diff options
Diffstat (limited to 'src/librustdoc/html')
76 files changed, 22160 insertions, 0 deletions
diff --git a/src/librustdoc/html/escape.rs b/src/librustdoc/html/escape.rs new file mode 100644 index 000000000..4a19d0a44 --- /dev/null +++ b/src/librustdoc/html/escape.rs @@ -0,0 +1,40 @@ +//! HTML escaping. +//! +//! This module contains one unit struct, which can be used to HTML-escape a +//! string of text (for use in a format string). + +use std::fmt; + +/// Wrapper struct which will emit the HTML-escaped version of the contained +/// string when passed to a format string. +pub(crate) struct Escape<'a>(pub &'a str); + +impl<'a> fmt::Display for Escape<'a> { + fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { + // Because the internet is always right, turns out there's not that many + // characters to escape: http://stackoverflow.com/questions/7381974 + let Escape(s) = *self; + let pile_o_bits = s; + let mut last = 0; + for (i, ch) in s.char_indices() { + let s = match ch { + '>' => ">", + '<' => "<", + '&' => "&", + '\'' => "'", + '"' => """, + _ => continue, + }; + fmt.write_str(&pile_o_bits[last..i])?; + fmt.write_str(s)?; + // NOTE: we only expect single byte characters here - which is fine as long as we + // only match single byte characters + last = i + 1; + } + + if last < s.len() { + fmt.write_str(&pile_o_bits[last..])?; + } + Ok(()) + } +} diff --git a/src/librustdoc/html/format.rs b/src/librustdoc/html/format.rs new file mode 100644 index 000000000..36a47b05c --- /dev/null +++ b/src/librustdoc/html/format.rs @@ -0,0 +1,1688 @@ +//! HTML formatting module +//! +//! This module contains a large number of `fmt::Display` implementations for +//! various types in `rustdoc::clean`. These implementations all currently +//! assume that HTML output is desired, although it may be possible to redesign +//! them in the future to instead emit any format desired. + +use std::borrow::Cow; +use std::cell::Cell; +use std::fmt; +use std::iter::{self, once}; + +use rustc_ast as ast; +use rustc_attr::{ConstStability, StabilityLevel}; +use rustc_data_structures::captures::Captures; +use rustc_data_structures::fx::FxHashSet; +use rustc_hir as hir; +use rustc_hir::def::DefKind; +use rustc_hir::def_id::DefId; +use rustc_metadata::creader::{CStore, LoadedMacro}; +use rustc_middle::ty; +use rustc_middle::ty::DefIdTree; +use rustc_middle::ty::TyCtxt; +use rustc_span::symbol::kw; +use rustc_span::{sym, Symbol}; +use rustc_target::spec::abi::Abi; + +use itertools::Itertools; + +use crate::clean::{ + self, types::ExternalLocation, utils::find_nearest_parent_module, ExternalCrate, ItemId, + PrimitiveType, +}; +use crate::formats::item_type::ItemType; +use crate::html::escape::Escape; +use crate::html::render::Context; + +use super::url_parts_builder::estimate_item_path_byte_length; +use super::url_parts_builder::UrlPartsBuilder; + +pub(crate) trait Print { + fn print(self, buffer: &mut Buffer); +} + +impl<F> Print for F +where + F: FnOnce(&mut Buffer), +{ + fn print(self, buffer: &mut Buffer) { + (self)(buffer) + } +} + +impl Print for String { + fn print(self, buffer: &mut Buffer) { + buffer.write_str(&self); + } +} + +impl Print for &'_ str { + fn print(self, buffer: &mut Buffer) { + buffer.write_str(self); + } +} + +#[derive(Debug, Clone)] +pub(crate) struct Buffer { + for_html: bool, + buffer: String, +} + +impl core::fmt::Write for Buffer { + #[inline] + fn write_str(&mut self, s: &str) -> fmt::Result { + self.buffer.write_str(s) + } + + #[inline] + fn write_char(&mut self, c: char) -> fmt::Result { + self.buffer.write_char(c) + } + + #[inline] + fn write_fmt(&mut self, args: fmt::Arguments<'_>) -> fmt::Result { + self.buffer.write_fmt(args) + } +} + +impl Buffer { + pub(crate) fn empty_from(v: &Buffer) -> Buffer { + Buffer { for_html: v.for_html, buffer: String::new() } + } + + pub(crate) fn html() -> Buffer { + Buffer { for_html: true, buffer: String::new() } + } + + pub(crate) fn new() -> Buffer { + Buffer { for_html: false, buffer: String::new() } + } + + pub(crate) fn is_empty(&self) -> bool { + self.buffer.is_empty() + } + + pub(crate) fn into_inner(self) -> String { + self.buffer + } + + pub(crate) fn insert_str(&mut self, idx: usize, s: &str) { + self.buffer.insert_str(idx, s); + } + + pub(crate) fn push_str(&mut self, s: &str) { + self.buffer.push_str(s); + } + + pub(crate) fn push_buffer(&mut self, other: Buffer) { + self.buffer.push_str(&other.buffer); + } + + // Intended for consumption by write! and writeln! (std::fmt) but without + // the fmt::Result return type imposed by fmt::Write (and avoiding the trait + // import). + pub(crate) fn write_str(&mut self, s: &str) { + self.buffer.push_str(s); + } + + // Intended for consumption by write! and writeln! (std::fmt) but without + // the fmt::Result return type imposed by fmt::Write (and avoiding the trait + // import). + pub(crate) fn write_fmt(&mut self, v: fmt::Arguments<'_>) { + use fmt::Write; + self.buffer.write_fmt(v).unwrap(); + } + + pub(crate) fn to_display<T: Print>(mut self, t: T) -> String { + t.print(&mut self); + self.into_inner() + } + + pub(crate) fn is_for_html(&self) -> bool { + self.for_html + } + + pub(crate) fn reserve(&mut self, additional: usize) { + self.buffer.reserve(additional) + } + + pub(crate) fn len(&self) -> usize { + self.buffer.len() + } +} + +fn comma_sep<T: fmt::Display>( + items: impl Iterator<Item = T>, + space_after_comma: bool, +) -> impl fmt::Display { + display_fn(move |f| { + for (i, item) in items.enumerate() { + if i != 0 { + write!(f, ",{}", if space_after_comma { " " } else { "" })?; + } + fmt::Display::fmt(&item, f)?; + } + Ok(()) + }) +} + +pub(crate) fn print_generic_bounds<'a, 'tcx: 'a>( + bounds: &'a [clean::GenericBound], + cx: &'a Context<'tcx>, +) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| { + let mut bounds_dup = FxHashSet::default(); + + for (i, bound) in bounds.iter().filter(|b| bounds_dup.insert(b.clone())).enumerate() { + if i > 0 { + f.write_str(" + ")?; + } + fmt::Display::fmt(&bound.print(cx), f)?; + } + Ok(()) + }) +} + +impl clean::GenericParamDef { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| match &self.kind { + clean::GenericParamDefKind::Lifetime { outlives } => { + write!(f, "{}", self.name)?; + + if !outlives.is_empty() { + f.write_str(": ")?; + for (i, lt) in outlives.iter().enumerate() { + if i != 0 { + f.write_str(" + ")?; + } + write!(f, "{}", lt.print())?; + } + } + + Ok(()) + } + clean::GenericParamDefKind::Type { bounds, default, .. } => { + f.write_str(self.name.as_str())?; + + if !bounds.is_empty() { + if f.alternate() { + write!(f, ": {:#}", print_generic_bounds(bounds, cx))?; + } else { + write!(f, ": {}", print_generic_bounds(bounds, cx))?; + } + } + + if let Some(ref ty) = default { + if f.alternate() { + write!(f, " = {:#}", ty.print(cx))?; + } else { + write!(f, " = {}", ty.print(cx))?; + } + } + + Ok(()) + } + clean::GenericParamDefKind::Const { ty, default, .. } => { + if f.alternate() { + write!(f, "const {}: {:#}", self.name, ty.print(cx))?; + } else { + write!(f, "const {}: {}", self.name, ty.print(cx))?; + } + + if let Some(default) = default { + if f.alternate() { + write!(f, " = {:#}", default)?; + } else { + write!(f, " = {}", default)?; + } + } + + Ok(()) + } + }) + } +} + +impl clean::Generics { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| { + let mut real_params = + self.params.iter().filter(|p| !p.is_synthetic_type_param()).peekable(); + if real_params.peek().is_none() { + return Ok(()); + } + + if f.alternate() { + write!(f, "<{:#}>", comma_sep(real_params.map(|g| g.print(cx)), true)) + } else { + write!(f, "<{}>", comma_sep(real_params.map(|g| g.print(cx)), true)) + } + }) + } +} + +#[derive(Clone, Copy, PartialEq, Eq)] +pub(crate) enum Ending { + Newline, + NoNewline, +} + +/// * The Generics from which to emit a where-clause. +/// * The number of spaces to indent each line with. +/// * Whether the where-clause needs to add a comma and newline after the last bound. +pub(crate) fn print_where_clause<'a, 'tcx: 'a>( + gens: &'a clean::Generics, + cx: &'a Context<'tcx>, + indent: usize, + ending: Ending, +) -> impl fmt::Display + 'a + Captures<'tcx> { + use fmt::Write; + + display_fn(move |f| { + let mut where_predicates = gens.where_predicates.iter().filter(|pred| { + !matches!(pred, clean::WherePredicate::BoundPredicate { bounds, .. } if bounds.is_empty()) + }).map(|pred| { + display_fn(move |f| { + if f.alternate() { + f.write_str(" ")?; + } else { + f.write_str("<br>")?; + } + + match pred { + clean::WherePredicate::BoundPredicate { ty, bounds, bound_params } => { + let ty_cx = ty.print(cx); + let generic_bounds = print_generic_bounds(bounds, cx); + + if bound_params.is_empty() { + if f.alternate() { + write!(f, "{ty_cx:#}: {generic_bounds:#}") + } else { + write!(f, "{ty_cx}: {generic_bounds}") + } + } else { + if f.alternate() { + write!( + f, + "for<{:#}> {ty_cx:#}: {generic_bounds:#}", + comma_sep(bound_params.iter().map(|lt| lt.print()), true) + ) + } else { + write!( + f, + "for<{}> {ty_cx}: {generic_bounds}", + comma_sep(bound_params.iter().map(|lt| lt.print()), true) + ) + } + } + } + clean::WherePredicate::RegionPredicate { lifetime, bounds } => { + let mut bounds_display = String::new(); + for bound in bounds.iter().map(|b| b.print(cx)) { + write!(bounds_display, "{bound} + ")?; + } + bounds_display.truncate(bounds_display.len() - " + ".len()); + write!(f, "{}: {bounds_display}", lifetime.print()) + } + clean::WherePredicate::EqPredicate { lhs, rhs } => { + if f.alternate() { + write!(f, "{:#} == {:#}", lhs.print(cx), rhs.print(cx)) + } else { + write!(f, "{} == {}", lhs.print(cx), rhs.print(cx)) + } + } + } + }) + }).peekable(); + + if where_predicates.peek().is_none() { + return Ok(()); + } + + let where_preds = comma_sep(where_predicates, false); + let clause = if f.alternate() { + if ending == Ending::Newline { + // add a space so stripping <br> tags and breaking spaces still renders properly + format!(" where{where_preds}, ") + } else { + format!(" where{where_preds}") + } + } else { + let mut br_with_padding = String::with_capacity(6 * indent + 28); + br_with_padding.push_str("<br>"); + for _ in 0..indent + 4 { + br_with_padding.push_str(" "); + } + let where_preds = where_preds.to_string().replace("<br>", &br_with_padding); + + if ending == Ending::Newline { + let mut clause = " ".repeat(indent.saturating_sub(1)); + // add a space so stripping <br> tags and breaking spaces still renders properly + write!( + clause, + " <span class=\"where fmt-newline\">where{where_preds}, </span>" + )?; + clause + } else { + // insert a <br> tag after a single space but before multiple spaces at the start + if indent == 0 { + format!(" <br><span class=\"where\">where{where_preds}</span>") + } else { + let mut clause = br_with_padding; + clause.truncate(clause.len() - 5 * " ".len()); + write!(clause, " <span class=\"where\">where{where_preds}</span>")?; + clause + } + } + }; + write!(f, "{clause}") + }) +} + +impl clean::Lifetime { + pub(crate) fn print(&self) -> impl fmt::Display + '_ { + self.0.as_str() + } +} + +impl clean::Constant { + pub(crate) fn print(&self, tcx: TyCtxt<'_>) -> impl fmt::Display + '_ { + let expr = self.expr(tcx); + display_fn( + move |f| { + if f.alternate() { f.write_str(&expr) } else { write!(f, "{}", Escape(&expr)) } + }, + ) + } +} + +impl clean::PolyTrait { + fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| { + if !self.generic_params.is_empty() { + if f.alternate() { + write!( + f, + "for<{:#}> ", + comma_sep(self.generic_params.iter().map(|g| g.print(cx)), true) + )?; + } else { + write!( + f, + "for<{}> ", + comma_sep(self.generic_params.iter().map(|g| g.print(cx)), true) + )?; + } + } + if f.alternate() { + write!(f, "{:#}", self.trait_.print(cx)) + } else { + write!(f, "{}", self.trait_.print(cx)) + } + }) + } +} + +impl clean::GenericBound { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| match self { + clean::GenericBound::Outlives(lt) => write!(f, "{}", lt.print()), + clean::GenericBound::TraitBound(ty, modifier) => { + let modifier_str = match modifier { + hir::TraitBoundModifier::None => "", + hir::TraitBoundModifier::Maybe => "?", + // ~const is experimental; do not display those bounds in rustdoc + hir::TraitBoundModifier::MaybeConst => "", + }; + if f.alternate() { + write!(f, "{}{:#}", modifier_str, ty.print(cx)) + } else { + write!(f, "{}{}", modifier_str, ty.print(cx)) + } + } + }) + } +} + +impl clean::GenericArgs { + fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| { + match self { + clean::GenericArgs::AngleBracketed { args, bindings } => { + if !args.is_empty() || !bindings.is_empty() { + if f.alternate() { + f.write_str("<")?; + } else { + f.write_str("<")?; + } + let mut comma = false; + for arg in args.iter() { + if comma { + f.write_str(", ")?; + } + comma = true; + if f.alternate() { + write!(f, "{:#}", arg.print(cx))?; + } else { + write!(f, "{}", arg.print(cx))?; + } + } + for binding in bindings.iter() { + if comma { + f.write_str(", ")?; + } + comma = true; + if f.alternate() { + write!(f, "{:#}", binding.print(cx))?; + } else { + write!(f, "{}", binding.print(cx))?; + } + } + if f.alternate() { + f.write_str(">")?; + } else { + f.write_str(">")?; + } + } + } + clean::GenericArgs::Parenthesized { inputs, output } => { + f.write_str("(")?; + let mut comma = false; + for ty in inputs.iter() { + if comma { + f.write_str(", ")?; + } + comma = true; + if f.alternate() { + write!(f, "{:#}", ty.print(cx))?; + } else { + write!(f, "{}", ty.print(cx))?; + } + } + f.write_str(")")?; + if let Some(ref ty) = *output { + if f.alternate() { + write!(f, " -> {:#}", ty.print(cx))?; + } else { + write!(f, " -> {}", ty.print(cx))?; + } + } + } + } + Ok(()) + }) + } +} + +// Possible errors when computing href link source for a `DefId` +#[derive(PartialEq, Eq)] +pub(crate) enum HrefError { + /// This item is known to rustdoc, but from a crate that does not have documentation generated. + /// + /// This can only happen for non-local items. + /// + /// # Example + /// + /// Crate `a` defines a public trait and crate `b` – the target crate that depends on `a` – + /// implements it for a local type. + /// We document `b` but **not** `a` (we only _build_ the latter – with `rustc`): + /// + /// ```sh + /// rustc a.rs --crate-type=lib + /// rustdoc b.rs --crate-type=lib --extern=a=liba.rlib + /// ``` + /// + /// Now, the associated items in the trait impl want to link to the corresponding item in the + /// trait declaration (see `html::render::assoc_href_attr`) but it's not available since their + /// *documentation (was) not built*. + DocumentationNotBuilt, + /// This can only happen for non-local items when `--document-private-items` is not passed. + Private, + // Not in external cache, href link should be in same page + NotInExternalCache, +} + +// Panics if `syms` is empty. +pub(crate) fn join_with_double_colon(syms: &[Symbol]) -> String { + let mut s = String::with_capacity(estimate_item_path_byte_length(syms.len())); + s.push_str(syms[0].as_str()); + for sym in &syms[1..] { + s.push_str("::"); + s.push_str(sym.as_str()); + } + s +} + +/// This function is to get the external macro path because they are not in the cache used in +/// `href_with_root_path`. +fn generate_macro_def_id_path( + def_id: DefId, + cx: &Context<'_>, + root_path: Option<&str>, +) -> Result<(String, ItemType, Vec<Symbol>), HrefError> { + let tcx = cx.shared.tcx; + let crate_name = tcx.crate_name(def_id.krate).to_string(); + let cache = cx.cache(); + + let fqp: Vec<Symbol> = tcx + .def_path(def_id) + .data + .into_iter() + .filter_map(|elem| { + // extern blocks (and a few others things) have an empty name. + match elem.data.get_opt_name() { + Some(s) if !s.is_empty() => Some(s), + _ => None, + } + }) + .collect(); + let relative = fqp.iter().map(|elem| elem.to_string()); + let cstore = CStore::from_tcx(tcx); + // We need this to prevent a `panic` when this function is used from intra doc links... + if !cstore.has_crate_data(def_id.krate) { + debug!("No data for crate {}", crate_name); + return Err(HrefError::NotInExternalCache); + } + // Check to see if it is a macro 2.0 or built-in macro. + // More information in <https://rust-lang.github.io/rfcs/1584-macros.html>. + let is_macro_2 = match cstore.load_macro_untracked(def_id, tcx.sess) { + LoadedMacro::MacroDef(def, _) => { + // If `ast_def.macro_rules` is `true`, then it's not a macro 2.0. + matches!(&def.kind, ast::ItemKind::MacroDef(ast_def) if !ast_def.macro_rules) + } + _ => false, + }; + + let mut path = if is_macro_2 { + once(crate_name.clone()).chain(relative).collect() + } else { + vec![crate_name.clone(), relative.last().unwrap()] + }; + if path.len() < 2 { + // The minimum we can have is the crate name followed by the macro name. If shorter, then + // it means that that `relative` was empty, which is an error. + debug!("macro path cannot be empty!"); + return Err(HrefError::NotInExternalCache); + } + + if let Some(last) = path.last_mut() { + *last = format!("macro.{}.html", last); + } + + let url = match cache.extern_locations[&def_id.krate] { + ExternalLocation::Remote(ref s) => { + // `ExternalLocation::Remote` always end with a `/`. + format!("{}{}", s, path.join("/")) + } + ExternalLocation::Local => { + // `root_path` always end with a `/`. + format!("{}{}/{}", root_path.unwrap_or(""), crate_name, path.join("/")) + } + ExternalLocation::Unknown => { + debug!("crate {} not in cache when linkifying macros", crate_name); + return Err(HrefError::NotInExternalCache); + } + }; + Ok((url, ItemType::Macro, fqp)) +} + +pub(crate) fn href_with_root_path( + did: DefId, + cx: &Context<'_>, + root_path: Option<&str>, +) -> Result<(String, ItemType, Vec<Symbol>), HrefError> { + let tcx = cx.tcx(); + let def_kind = tcx.def_kind(did); + let did = match def_kind { + DefKind::AssocTy | DefKind::AssocFn | DefKind::AssocConst | DefKind::Variant => { + // documented on their parent's page + tcx.parent(did) + } + _ => did, + }; + let cache = cx.cache(); + let relative_to = &cx.current; + fn to_module_fqp(shortty: ItemType, fqp: &[Symbol]) -> &[Symbol] { + if shortty == ItemType::Module { fqp } else { &fqp[..fqp.len() - 1] } + } + + if !did.is_local() + && !cache.access_levels.is_public(did) + && !cache.document_private + && !cache.primitive_locations.values().any(|&id| id == did) + { + return Err(HrefError::Private); + } + + let mut is_remote = false; + let (fqp, shortty, mut url_parts) = match cache.paths.get(&did) { + Some(&(ref fqp, shortty)) => (fqp, shortty, { + let module_fqp = to_module_fqp(shortty, fqp.as_slice()); + debug!(?fqp, ?shortty, ?module_fqp); + href_relative_parts(module_fqp, relative_to).collect() + }), + None => { + if let Some(&(ref fqp, shortty)) = cache.external_paths.get(&did) { + let module_fqp = to_module_fqp(shortty, fqp); + ( + fqp, + shortty, + match cache.extern_locations[&did.krate] { + ExternalLocation::Remote(ref s) => { + is_remote = true; + let s = s.trim_end_matches('/'); + let mut builder = UrlPartsBuilder::singleton(s); + builder.extend(module_fqp.iter().copied()); + builder + } + ExternalLocation::Local => { + href_relative_parts(module_fqp, relative_to).collect() + } + ExternalLocation::Unknown => return Err(HrefError::DocumentationNotBuilt), + }, + ) + } else if matches!(def_kind, DefKind::Macro(_)) { + return generate_macro_def_id_path(did, cx, root_path); + } else { + return Err(HrefError::NotInExternalCache); + } + } + }; + if !is_remote { + if let Some(root_path) = root_path { + let root = root_path.trim_end_matches('/'); + url_parts.push_front(root); + } + } + debug!(?url_parts); + match shortty { + ItemType::Module => { + url_parts.push("index.html"); + } + _ => { + let prefix = shortty.as_str(); + let last = fqp.last().unwrap(); + url_parts.push_fmt(format_args!("{}.{}.html", prefix, last)); + } + } + Ok((url_parts.finish(), shortty, fqp.to_vec())) +} + +pub(crate) fn href( + did: DefId, + cx: &Context<'_>, +) -> Result<(String, ItemType, Vec<Symbol>), HrefError> { + href_with_root_path(did, cx, None) +} + +/// Both paths should only be modules. +/// This is because modules get their own directories; that is, `std::vec` and `std::vec::Vec` will +/// both need `../iter/trait.Iterator.html` to get at the iterator trait. +pub(crate) fn href_relative_parts<'fqp>( + fqp: &'fqp [Symbol], + relative_to_fqp: &[Symbol], +) -> Box<dyn Iterator<Item = Symbol> + 'fqp> { + for (i, (f, r)) in fqp.iter().zip(relative_to_fqp.iter()).enumerate() { + // e.g. linking to std::iter from std::vec (`dissimilar_part_count` will be 1) + if f != r { + let dissimilar_part_count = relative_to_fqp.len() - i; + let fqp_module = &fqp[i..fqp.len()]; + return Box::new( + iter::repeat(sym::dotdot) + .take(dissimilar_part_count) + .chain(fqp_module.iter().copied()), + ); + } + } + // e.g. linking to std::sync::atomic from std::sync + if relative_to_fqp.len() < fqp.len() { + Box::new(fqp[relative_to_fqp.len()..fqp.len()].iter().copied()) + // e.g. linking to std::sync from std::sync::atomic + } else if fqp.len() < relative_to_fqp.len() { + let dissimilar_part_count = relative_to_fqp.len() - fqp.len(); + Box::new(iter::repeat(sym::dotdot).take(dissimilar_part_count)) + // linking to the same module + } else { + Box::new(iter::empty()) + } +} + +/// Used to render a [`clean::Path`]. +fn resolved_path<'cx>( + w: &mut fmt::Formatter<'_>, + did: DefId, + path: &clean::Path, + print_all: bool, + use_absolute: bool, + cx: &'cx Context<'_>, +) -> fmt::Result { + let last = path.segments.last().unwrap(); + + if print_all { + for seg in &path.segments[..path.segments.len() - 1] { + write!(w, "{}::", if seg.name == kw::PathRoot { "" } else { seg.name.as_str() })?; + } + } + if w.alternate() { + write!(w, "{}{:#}", &last.name, last.args.print(cx))?; + } else { + let path = if use_absolute { + if let Ok((_, _, fqp)) = href(did, cx) { + format!( + "{}::{}", + join_with_double_colon(&fqp[..fqp.len() - 1]), + anchor(did, *fqp.last().unwrap(), cx) + ) + } else { + last.name.to_string() + } + } else { + anchor(did, last.name, cx).to_string() + }; + write!(w, "{}{}", path, last.args.print(cx))?; + } + Ok(()) +} + +fn primitive_link( + f: &mut fmt::Formatter<'_>, + prim: clean::PrimitiveType, + name: &str, + cx: &Context<'_>, +) -> fmt::Result { + primitive_link_fragment(f, prim, name, "", cx) +} + +fn primitive_link_fragment( + f: &mut fmt::Formatter<'_>, + prim: clean::PrimitiveType, + name: &str, + fragment: &str, + cx: &Context<'_>, +) -> fmt::Result { + let m = &cx.cache(); + let mut needs_termination = false; + if !f.alternate() { + match m.primitive_locations.get(&prim) { + Some(&def_id) if def_id.is_local() => { + let len = cx.current.len(); + let len = if len == 0 { 0 } else { len - 1 }; + write!( + f, + "<a class=\"primitive\" href=\"{}primitive.{}.html{fragment}\">", + "../".repeat(len), + prim.as_sym() + )?; + needs_termination = true; + } + Some(&def_id) => { + let loc = match m.extern_locations[&def_id.krate] { + ExternalLocation::Remote(ref s) => { + let cname_sym = ExternalCrate { crate_num: def_id.krate }.name(cx.tcx()); + let builder: UrlPartsBuilder = + [s.as_str().trim_end_matches('/'), cname_sym.as_str()] + .into_iter() + .collect(); + Some(builder) + } + ExternalLocation::Local => { + let cname_sym = ExternalCrate { crate_num: def_id.krate }.name(cx.tcx()); + Some(if cx.current.first() == Some(&cname_sym) { + iter::repeat(sym::dotdot).take(cx.current.len() - 1).collect() + } else { + iter::repeat(sym::dotdot) + .take(cx.current.len()) + .chain(iter::once(cname_sym)) + .collect() + }) + } + ExternalLocation::Unknown => None, + }; + if let Some(mut loc) = loc { + loc.push_fmt(format_args!("primitive.{}.html", prim.as_sym())); + write!(f, "<a class=\"primitive\" href=\"{}{fragment}\">", loc.finish())?; + needs_termination = true; + } + } + None => {} + } + } + write!(f, "{}", name)?; + if needs_termination { + write!(f, "</a>")?; + } + Ok(()) +} + +/// Helper to render type parameters +fn tybounds<'a, 'tcx: 'a>( + bounds: &'a [clean::PolyTrait], + lt: &'a Option<clean::Lifetime>, + cx: &'a Context<'tcx>, +) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| { + for (i, bound) in bounds.iter().enumerate() { + if i > 0 { + write!(f, " + ")?; + } + + fmt::Display::fmt(&bound.print(cx), f)?; + } + + if let Some(lt) = lt { + write!(f, " + ")?; + fmt::Display::fmt(<.print(), f)?; + } + Ok(()) + }) +} + +pub(crate) fn anchor<'a, 'cx: 'a>( + did: DefId, + text: Symbol, + cx: &'cx Context<'_>, +) -> impl fmt::Display + 'a { + let parts = href(did, cx); + display_fn(move |f| { + if let Ok((url, short_ty, fqp)) = parts { + write!( + f, + r#"<a class="{}" href="{}" title="{} {}">{}</a>"#, + short_ty, + url, + short_ty, + join_with_double_colon(&fqp), + text.as_str() + ) + } else { + write!(f, "{}", text) + } + }) +} + +fn fmt_type<'cx>( + t: &clean::Type, + f: &mut fmt::Formatter<'_>, + use_absolute: bool, + cx: &'cx Context<'_>, +) -> fmt::Result { + trace!("fmt_type(t = {:?})", t); + + match *t { + clean::Generic(name) => write!(f, "{}", name), + clean::Type::Path { ref path } => { + // Paths like `T::Output` and `Self::Output` should be rendered with all segments. + let did = path.def_id(); + resolved_path(f, did, path, path.is_assoc_ty(), use_absolute, cx) + } + clean::DynTrait(ref bounds, ref lt) => { + f.write_str("dyn ")?; + fmt::Display::fmt(&tybounds(bounds, lt, cx), f) + } + clean::Infer => write!(f, "_"), + clean::Primitive(clean::PrimitiveType::Never) => { + primitive_link(f, PrimitiveType::Never, "!", cx) + } + clean::Primitive(prim) => primitive_link(f, prim, prim.as_sym().as_str(), cx), + clean::BareFunction(ref decl) => { + if f.alternate() { + write!( + f, + "{:#}{}{:#}fn{:#}", + decl.print_hrtb_with_space(cx), + decl.unsafety.print_with_space(), + print_abi_with_space(decl.abi), + decl.decl.print(cx), + ) + } else { + write!( + f, + "{}{}{}", + decl.print_hrtb_with_space(cx), + decl.unsafety.print_with_space(), + print_abi_with_space(decl.abi) + )?; + primitive_link(f, PrimitiveType::Fn, "fn", cx)?; + write!(f, "{}", decl.decl.print(cx)) + } + } + clean::Tuple(ref typs) => { + match &typs[..] { + &[] => primitive_link(f, PrimitiveType::Unit, "()", cx), + &[ref one] => { + if let clean::Generic(name) = one { + primitive_link(f, PrimitiveType::Tuple, &format!("({name},)"), cx) + } else { + write!(f, "(")?; + // Carry `f.alternate()` into this display w/o branching manually. + fmt::Display::fmt(&one.print(cx), f)?; + write!(f, ",)") + } + } + many => { + let generic_names: Vec<Symbol> = many + .iter() + .filter_map(|t| match t { + clean::Generic(name) => Some(*name), + _ => None, + }) + .collect(); + let is_generic = generic_names.len() == many.len(); + if is_generic { + primitive_link( + f, + PrimitiveType::Tuple, + &format!("({})", generic_names.iter().map(|s| s.as_str()).join(", ")), + cx, + ) + } else { + write!(f, "(")?; + for (i, item) in many.iter().enumerate() { + if i != 0 { + write!(f, ", ")?; + } + // Carry `f.alternate()` into this display w/o branching manually. + fmt::Display::fmt(&item.print(cx), f)?; + } + write!(f, ")") + } + } + } + } + clean::Slice(ref t) => match **t { + clean::Generic(name) => { + primitive_link(f, PrimitiveType::Slice, &format!("[{name}]"), cx) + } + _ => { + write!(f, "[")?; + fmt::Display::fmt(&t.print(cx), f)?; + write!(f, "]") + } + }, + clean::Array(ref t, ref n) => { + primitive_link(f, PrimitiveType::Array, "[", cx)?; + fmt::Display::fmt(&t.print(cx), f)?; + if f.alternate() { + primitive_link(f, PrimitiveType::Array, &format!("; {}]", n), cx) + } else { + primitive_link(f, PrimitiveType::Array, &format!("; {}]", Escape(n)), cx) + } + } + clean::RawPointer(m, ref t) => { + let m = match m { + hir::Mutability::Mut => "mut", + hir::Mutability::Not => "const", + }; + + if matches!(**t, clean::Generic(_)) || t.is_assoc_ty() { + let text = if f.alternate() { + format!("*{} {:#}", m, t.print(cx)) + } else { + format!("*{} {}", m, t.print(cx)) + }; + primitive_link(f, clean::PrimitiveType::RawPointer, &text, cx) + } else { + primitive_link(f, clean::PrimitiveType::RawPointer, &format!("*{} ", m), cx)?; + fmt::Display::fmt(&t.print(cx), f) + } + } + clean::BorrowedRef { lifetime: ref l, mutability, type_: ref ty } => { + let lt = match l { + Some(l) => format!("{} ", l.print()), + _ => String::new(), + }; + let m = mutability.print_with_space(); + let amp = if f.alternate() { "&".to_string() } else { "&".to_string() }; + match **ty { + clean::DynTrait(ref bounds, ref trait_lt) + if bounds.len() > 1 || trait_lt.is_some() => + { + write!(f, "{}{}{}(", amp, lt, m)?; + fmt_type(ty, f, use_absolute, cx)?; + write!(f, ")") + } + clean::Generic(..) => { + primitive_link( + f, + PrimitiveType::Reference, + &format!("{}{}{}", amp, lt, m), + cx, + )?; + fmt_type(ty, f, use_absolute, cx) + } + _ => { + write!(f, "{}{}{}", amp, lt, m)?; + fmt_type(ty, f, use_absolute, cx) + } + } + } + clean::ImplTrait(ref bounds) => { + if f.alternate() { + write!(f, "impl {:#}", print_generic_bounds(bounds, cx)) + } else { + write!(f, "impl {}", print_generic_bounds(bounds, cx)) + } + } + clean::QPath { ref assoc, ref self_type, ref trait_, should_show_cast } => { + if f.alternate() { + if should_show_cast { + write!(f, "<{:#} as {:#}>::", self_type.print(cx), trait_.print(cx))? + } else { + write!(f, "{:#}::", self_type.print(cx))? + } + } else { + if should_show_cast { + write!(f, "<{} as {}>::", self_type.print(cx), trait_.print(cx))? + } else { + write!(f, "{}::", self_type.print(cx))? + } + }; + // It's pretty unsightly to look at `<A as B>::C` in output, and + // we've got hyperlinking on our side, so try to avoid longer + // notation as much as possible by making `C` a hyperlink to trait + // `B` to disambiguate. + // + // FIXME: this is still a lossy conversion and there should probably + // be a better way of representing this in general? Most of + // the ugliness comes from inlining across crates where + // everything comes in as a fully resolved QPath (hard to + // look at). + match href(trait_.def_id(), cx) { + Ok((ref url, _, ref path)) if !f.alternate() => { + write!( + f, + "<a class=\"associatedtype\" href=\"{url}#{shortty}.{name}\" \ + title=\"type {path}::{name}\">{name}</a>{args}", + url = url, + shortty = ItemType::AssocType, + name = assoc.name, + path = join_with_double_colon(path), + args = assoc.args.print(cx), + )?; + } + _ => write!(f, "{}{:#}", assoc.name, assoc.args.print(cx))?, + } + Ok(()) + } + } +} + +impl clean::Type { + pub(crate) fn print<'b, 'a: 'b, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'b + Captures<'tcx> { + display_fn(move |f| fmt_type(self, f, false, cx)) + } +} + +impl clean::Path { + pub(crate) fn print<'b, 'a: 'b, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'b + Captures<'tcx> { + display_fn(move |f| resolved_path(f, self.def_id(), self, false, false, cx)) + } +} + +impl clean::Impl { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + use_absolute: bool, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| { + if f.alternate() { + write!(f, "impl{:#} ", self.generics.print(cx))?; + } else { + write!(f, "impl{} ", self.generics.print(cx))?; + } + + if let Some(ref ty) = self.trait_ { + match self.polarity { + ty::ImplPolarity::Positive | ty::ImplPolarity::Reservation => {} + ty::ImplPolarity::Negative => write!(f, "!")?, + } + fmt::Display::fmt(&ty.print(cx), f)?; + write!(f, " for ")?; + } + + if let clean::Type::Tuple(types) = &self.for_ && + let [clean::Type::Generic(name)] = &types[..] && + (self.kind.is_fake_variadic() || self.kind.is_auto()) + { + // Hardcoded anchor library/core/src/primitive_docs.rs + // Link should match `# Trait implementations` + primitive_link_fragment(f, PrimitiveType::Tuple, &format!("({name}₁, {name}₂, …, {name}ₙ)"), "#trait-implementations-1", cx)?; + } else if let clean::BareFunction(bare_fn) = &self.for_ && + let [clean::Argument { type_: clean::Type::Generic(name), .. }] = &bare_fn.decl.inputs.values[..] && + (self.kind.is_fake_variadic() || self.kind.is_auto()) + { + // Hardcoded anchor library/core/src/primitive_docs.rs + // Link should match `# Trait implementations` + + let hrtb = bare_fn.print_hrtb_with_space(cx); + let unsafety = bare_fn.unsafety.print_with_space(); + let abi = print_abi_with_space(bare_fn.abi); + if f.alternate() { + write!( + f, + "{hrtb:#}{unsafety}{abi:#}", + )?; + } else { + write!( + f, + "{hrtb}{unsafety}{abi}", + )?; + } + let ellipsis = if bare_fn.decl.c_variadic { + ", ..." + } else { + "" + }; + primitive_link_fragment(f, PrimitiveType::Tuple, &format!("fn ({name}₁, {name}₂, …, {name}ₙ{ellipsis})"), "#trait-implementations-1", cx)?; + // Write output. + if let clean::FnRetTy::Return(ty) = &bare_fn.decl.output { + write!(f, " -> ")?; + fmt_type(ty, f, use_absolute, cx)?; + } + } else if let Some(ty) = self.kind.as_blanket_ty() { + fmt_type(ty, f, use_absolute, cx)?; + } else { + fmt_type(&self.for_, f, use_absolute, cx)?; + } + + fmt::Display::fmt(&print_where_clause(&self.generics, cx, 0, Ending::Newline), f)?; + Ok(()) + }) + } +} + +impl clean::Arguments { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| { + for (i, input) in self.values.iter().enumerate() { + if !input.name.is_empty() { + write!(f, "{}: ", input.name)?; + } + if f.alternate() { + write!(f, "{:#}", input.type_.print(cx))?; + } else { + write!(f, "{}", input.type_.print(cx))?; + } + if i + 1 < self.values.len() { + write!(f, ", ")?; + } + } + Ok(()) + }) + } +} + +impl clean::FnRetTy { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| match self { + clean::Return(clean::Tuple(tys)) if tys.is_empty() => Ok(()), + clean::Return(ty) if f.alternate() => { + write!(f, " -> {:#}", ty.print(cx)) + } + clean::Return(ty) => write!(f, " -> {}", ty.print(cx)), + clean::DefaultReturn => Ok(()), + }) + } +} + +impl clean::BareFunctionDecl { + fn print_hrtb_with_space<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| { + if !self.generic_params.is_empty() { + write!( + f, + "for<{}> ", + comma_sep(self.generic_params.iter().map(|g| g.print(cx)), true) + ) + } else { + Ok(()) + } + }) + } +} + +impl clean::FnDecl { + pub(crate) fn print<'b, 'a: 'b, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'b + Captures<'tcx> { + display_fn(move |f| { + let ellipsis = if self.c_variadic { ", ..." } else { "" }; + if f.alternate() { + write!( + f, + "({args:#}{ellipsis}){arrow:#}", + args = self.inputs.print(cx), + ellipsis = ellipsis, + arrow = self.output.print(cx) + ) + } else { + write!( + f, + "({args}{ellipsis}){arrow}", + args = self.inputs.print(cx), + ellipsis = ellipsis, + arrow = self.output.print(cx) + ) + } + }) + } + + /// * `header_len`: The length of the function header and name. In other words, the number of + /// characters in the function declaration up to but not including the parentheses. + /// <br>Used to determine line-wrapping. + /// * `indent`: The number of spaces to indent each successive line with, if line-wrapping is + /// necessary. + /// * `asyncness`: Whether the function is async or not. + pub(crate) fn full_print<'a, 'tcx: 'a>( + &'a self, + header_len: usize, + indent: usize, + asyncness: hir::IsAsync, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| self.inner_full_print(header_len, indent, asyncness, f, cx)) + } + + fn inner_full_print( + &self, + header_len: usize, + indent: usize, + asyncness: hir::IsAsync, + f: &mut fmt::Formatter<'_>, + cx: &Context<'_>, + ) -> fmt::Result { + let amp = if f.alternate() { "&" } else { "&" }; + let mut args = Buffer::html(); + let mut args_plain = Buffer::new(); + for (i, input) in self.inputs.values.iter().enumerate() { + if let Some(selfty) = input.to_self() { + match selfty { + clean::SelfValue => { + args.push_str("self"); + args_plain.push_str("self"); + } + clean::SelfBorrowed(Some(ref lt), mtbl) => { + write!(args, "{}{} {}self", amp, lt.print(), mtbl.print_with_space()); + write!(args_plain, "&{} {}self", lt.print(), mtbl.print_with_space()); + } + clean::SelfBorrowed(None, mtbl) => { + write!(args, "{}{}self", amp, mtbl.print_with_space()); + write!(args_plain, "&{}self", mtbl.print_with_space()); + } + clean::SelfExplicit(ref typ) => { + if f.alternate() { + write!(args, "self: {:#}", typ.print(cx)); + } else { + write!(args, "self: {}", typ.print(cx)); + } + write!(args_plain, "self: {:#}", typ.print(cx)); + } + } + } else { + if i > 0 { + args.push_str("<br>"); + } + if input.is_const { + args.push_str("const "); + args_plain.push_str("const "); + } + if !input.name.is_empty() { + write!(args, "{}: ", input.name); + write!(args_plain, "{}: ", input.name); + } + + if f.alternate() { + write!(args, "{:#}", input.type_.print(cx)); + } else { + write!(args, "{}", input.type_.print(cx)); + } + write!(args_plain, "{:#}", input.type_.print(cx)); + } + if i + 1 < self.inputs.values.len() { + args.push_str(","); + args_plain.push_str(","); + } + } + + let mut args_plain = format!("({})", args_plain.into_inner()); + let mut args = args.into_inner(); + + if self.c_variadic { + args.push_str(",<br> ..."); + args_plain.push_str(", ..."); + } + + let arrow_plain; + let arrow = if let hir::IsAsync::Async = asyncness { + let output = self.sugared_async_return_type(); + arrow_plain = format!("{:#}", output.print(cx)); + if f.alternate() { arrow_plain.clone() } else { format!("{}", output.print(cx)) } + } else { + arrow_plain = format!("{:#}", self.output.print(cx)); + if f.alternate() { arrow_plain.clone() } else { format!("{}", self.output.print(cx)) } + }; + + let declaration_len = header_len + args_plain.len() + arrow_plain.len(); + let output = if declaration_len > 80 { + let full_pad = format!("<br>{}", " ".repeat(indent + 4)); + let close_pad = format!("<br>{}", " ".repeat(indent)); + format!( + "({pad}{args}{close}){arrow}", + pad = if self.inputs.values.is_empty() { "" } else { &full_pad }, + args = args.replace("<br>", &full_pad), + close = close_pad, + arrow = arrow + ) + } else { + format!("({args}){arrow}", args = args.replace("<br>", " "), arrow = arrow) + }; + + if f.alternate() { + write!(f, "{}", output.replace("<br>", "\n")) + } else { + write!(f, "{}", output) + } + } +} + +impl clean::Visibility { + pub(crate) fn print_with_space<'a, 'tcx: 'a>( + self, + item_did: ItemId, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + use std::fmt::Write as _; + + let to_print: Cow<'static, str> = match self { + clean::Public => "pub ".into(), + clean::Inherited => "".into(), + clean::Visibility::Restricted(vis_did) => { + // FIXME(camelid): This may not work correctly if `item_did` is a module. + // However, rustdoc currently never displays a module's + // visibility, so it shouldn't matter. + let parent_module = find_nearest_parent_module(cx.tcx(), item_did.expect_def_id()); + + if vis_did.is_crate_root() { + "pub(crate) ".into() + } else if parent_module == Some(vis_did) { + // `pub(in foo)` where `foo` is the parent module + // is the same as no visibility modifier + "".into() + } else if parent_module + .and_then(|parent| find_nearest_parent_module(cx.tcx(), parent)) + == Some(vis_did) + { + "pub(super) ".into() + } else { + let path = cx.tcx().def_path(vis_did); + debug!("path={:?}", path); + // modified from `resolved_path()` to work with `DefPathData` + let last_name = path.data.last().unwrap().data.get_opt_name().unwrap(); + let anchor = anchor(vis_did, last_name, cx).to_string(); + + let mut s = "pub(in ".to_owned(); + for seg in &path.data[..path.data.len() - 1] { + let _ = write!(s, "{}::", seg.data.get_opt_name().unwrap()); + } + let _ = write!(s, "{}) ", anchor); + s.into() + } + } + }; + display_fn(move |f| write!(f, "{}", to_print)) + } + + /// This function is the same as print_with_space, except that it renders no links. + /// It's used for macros' rendered source view, which is syntax highlighted and cannot have + /// any HTML in it. + pub(crate) fn to_src_with_space<'a, 'tcx: 'a>( + self, + tcx: TyCtxt<'tcx>, + item_did: DefId, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + let to_print = match self { + clean::Public => "pub ".to_owned(), + clean::Inherited => String::new(), + clean::Visibility::Restricted(vis_did) => { + // FIXME(camelid): This may not work correctly if `item_did` is a module. + // However, rustdoc currently never displays a module's + // visibility, so it shouldn't matter. + let parent_module = find_nearest_parent_module(tcx, item_did); + + if vis_did.is_crate_root() { + "pub(crate) ".to_owned() + } else if parent_module == Some(vis_did) { + // `pub(in foo)` where `foo` is the parent module + // is the same as no visibility modifier + String::new() + } else if parent_module.and_then(|parent| find_nearest_parent_module(tcx, parent)) + == Some(vis_did) + { + "pub(super) ".to_owned() + } else { + format!("pub(in {}) ", tcx.def_path_str(vis_did)) + } + } + }; + display_fn(move |f| f.write_str(&to_print)) + } +} + +pub(crate) trait PrintWithSpace { + fn print_with_space(&self) -> &str; +} + +impl PrintWithSpace for hir::Unsafety { + fn print_with_space(&self) -> &str { + match self { + hir::Unsafety::Unsafe => "unsafe ", + hir::Unsafety::Normal => "", + } + } +} + +impl PrintWithSpace for hir::IsAsync { + fn print_with_space(&self) -> &str { + match self { + hir::IsAsync::Async => "async ", + hir::IsAsync::NotAsync => "", + } + } +} + +impl PrintWithSpace for hir::Mutability { + fn print_with_space(&self) -> &str { + match self { + hir::Mutability::Not => "", + hir::Mutability::Mut => "mut ", + } + } +} + +pub(crate) fn print_constness_with_space( + c: &hir::Constness, + s: Option<ConstStability>, +) -> &'static str { + match (c, s) { + // const stable or when feature(staged_api) is not set + ( + hir::Constness::Const, + Some(ConstStability { level: StabilityLevel::Stable { .. }, .. }), + ) + | (hir::Constness::Const, None) => "const ", + // const unstable or not const + _ => "", + } +} + +impl clean::Import { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| match self.kind { + clean::ImportKind::Simple(name) => { + if name == self.source.path.last() { + write!(f, "use {};", self.source.print(cx)) + } else { + write!(f, "use {} as {};", self.source.print(cx), name) + } + } + clean::ImportKind::Glob => { + if self.source.path.segments.is_empty() { + write!(f, "use *;") + } else { + write!(f, "use {}::*;", self.source.print(cx)) + } + } + }) + } +} + +impl clean::ImportSource { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| match self.did { + Some(did) => resolved_path(f, did, &self.path, true, false, cx), + _ => { + for seg in &self.path.segments[..self.path.segments.len() - 1] { + write!(f, "{}::", seg.name)?; + } + let name = self.path.last(); + if let hir::def::Res::PrimTy(p) = self.path.res { + primitive_link(f, PrimitiveType::from(p), name.as_str(), cx)?; + } else { + write!(f, "{}", name)?; + } + Ok(()) + } + }) + } +} + +impl clean::TypeBinding { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| { + f.write_str(self.assoc.name.as_str())?; + if f.alternate() { + write!(f, "{:#}", self.assoc.args.print(cx))?; + } else { + write!(f, "{}", self.assoc.args.print(cx))?; + } + match self.kind { + clean::TypeBindingKind::Equality { ref term } => { + if f.alternate() { + write!(f, " = {:#}", term.print(cx))?; + } else { + write!(f, " = {}", term.print(cx))?; + } + } + clean::TypeBindingKind::Constraint { ref bounds } => { + if !bounds.is_empty() { + if f.alternate() { + write!(f, ": {:#}", print_generic_bounds(bounds, cx))?; + } else { + write!(f, ": {}", print_generic_bounds(bounds, cx))?; + } + } + } + } + Ok(()) + }) + } +} + +pub(crate) fn print_abi_with_space(abi: Abi) -> impl fmt::Display { + display_fn(move |f| { + let quot = if f.alternate() { "\"" } else { """ }; + match abi { + Abi::Rust => Ok(()), + abi => write!(f, "extern {0}{1}{0} ", quot, abi.name()), + } + }) +} + +pub(crate) fn print_default_space<'a>(v: bool) -> &'a str { + if v { "default " } else { "" } +} + +impl clean::GenericArg { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + display_fn(move |f| match self { + clean::GenericArg::Lifetime(lt) => fmt::Display::fmt(<.print(), f), + clean::GenericArg::Type(ty) => fmt::Display::fmt(&ty.print(cx), f), + clean::GenericArg::Const(ct) => fmt::Display::fmt(&ct.print(cx.tcx()), f), + clean::GenericArg::Infer => fmt::Display::fmt("_", f), + }) + } +} + +impl clean::types::Term { + pub(crate) fn print<'a, 'tcx: 'a>( + &'a self, + cx: &'a Context<'tcx>, + ) -> impl fmt::Display + 'a + Captures<'tcx> { + match self { + clean::types::Term::Type(ty) => ty.print(cx), + _ => todo!(), + } + } +} + +pub(crate) fn display_fn( + f: impl FnOnce(&mut fmt::Formatter<'_>) -> fmt::Result, +) -> impl fmt::Display { + struct WithFormatter<F>(Cell<Option<F>>); + + impl<F> fmt::Display for WithFormatter<F> + where + F: FnOnce(&mut fmt::Formatter<'_>) -> fmt::Result, + { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + (self.0.take()).unwrap()(f) + } + } + + WithFormatter(Cell::new(Some(f))) +} diff --git a/src/librustdoc/html/highlight.rs b/src/librustdoc/html/highlight.rs new file mode 100644 index 000000000..05547ea15 --- /dev/null +++ b/src/librustdoc/html/highlight.rs @@ -0,0 +1,805 @@ +//! Basic syntax highlighting functionality. +//! +//! This module uses librustc_ast's lexer to provide token-based highlighting for +//! the HTML documentation generated by rustdoc. +//! +//! Use the `render_with_highlighting` to highlight some rust code. + +use crate::clean::PrimitiveType; +use crate::html::escape::Escape; +use crate::html::render::Context; + +use std::collections::VecDeque; +use std::fmt::{Display, Write}; + +use rustc_data_structures::fx::FxHashMap; +use rustc_lexer::{LiteralKind, TokenKind}; +use rustc_span::edition::Edition; +use rustc_span::symbol::Symbol; +use rustc_span::{BytePos, Span, DUMMY_SP}; + +use super::format::{self, Buffer}; +use super::render::LinkFromSrc; + +/// This type is needed in case we want to render links on items to allow to go to their definition. +pub(crate) struct HrefContext<'a, 'b, 'c> { + pub(crate) context: &'a Context<'b>, + /// This span contains the current file we're going through. + pub(crate) file_span: Span, + /// This field is used to know "how far" from the top of the directory we are to link to either + /// documentation pages or other source pages. + pub(crate) root_path: &'c str, +} + +/// Decorations are represented as a map from CSS class to vector of character ranges. +/// Each range will be wrapped in a span with that class. +pub(crate) struct DecorationInfo(pub(crate) FxHashMap<&'static str, Vec<(u32, u32)>>); + +/// Highlights `src`, returning the HTML output. +pub(crate) fn render_with_highlighting( + src: &str, + out: &mut Buffer, + class: Option<&str>, + playground_button: Option<&str>, + tooltip: Option<(Option<Edition>, &str)>, + edition: Edition, + extra_content: Option<Buffer>, + href_context: Option<HrefContext<'_, '_, '_>>, + decoration_info: Option<DecorationInfo>, +) { + debug!("highlighting: ================\n{}\n==============", src); + if let Some((edition_info, class)) = tooltip { + write!( + out, + "<div class='information'><div class='tooltip {}'{}>ⓘ</div></div>", + class, + if let Some(edition_info) = edition_info { + format!(" data-edition=\"{}\"", edition_info) + } else { + String::new() + }, + ); + } + + write_header(out, class, extra_content); + write_code(out, src, edition, href_context, decoration_info); + write_footer(out, playground_button); +} + +fn write_header(out: &mut Buffer, class: Option<&str>, extra_content: Option<Buffer>) { + write!(out, "<div class=\"example-wrap\">"); + if let Some(extra) = extra_content { + out.push_buffer(extra); + } + if let Some(class) = class { + write!(out, "<pre class=\"rust {}\">", class); + } else { + write!(out, "<pre class=\"rust\">"); + } + write!(out, "<code>"); +} + +/// Convert the given `src` source code into HTML by adding classes for highlighting. +/// +/// This code is used to render code blocks (in the documentation) as well as the source code pages. +/// +/// Some explanations on the last arguments: +/// +/// In case we are rendering a code block and not a source code file, `href_context` will be `None`. +/// To put it more simply: if `href_context` is `None`, the code won't try to generate links to an +/// item definition. +/// +/// More explanations about spans and how we use them here are provided in the +fn write_code( + out: &mut Buffer, + src: &str, + edition: Edition, + href_context: Option<HrefContext<'_, '_, '_>>, + decoration_info: Option<DecorationInfo>, +) { + // This replace allows to fix how the code source with DOS backline characters is displayed. + let src = src.replace("\r\n", "\n"); + let mut closing_tags: Vec<&'static str> = Vec::new(); + Classifier::new( + &src, + edition, + href_context.as_ref().map(|c| c.file_span).unwrap_or(DUMMY_SP), + decoration_info, + ) + .highlight(&mut |highlight| { + match highlight { + Highlight::Token { text, class } => string(out, Escape(text), class, &href_context), + Highlight::EnterSpan { class } => { + closing_tags.push(enter_span(out, class, &href_context)) + } + Highlight::ExitSpan => { + exit_span(out, closing_tags.pop().expect("ExitSpan without EnterSpan")) + } + }; + }); +} + +fn write_footer(out: &mut Buffer, playground_button: Option<&str>) { + writeln!(out, "</code></pre>{}</div>", playground_button.unwrap_or_default()); +} + +/// How a span of text is classified. Mostly corresponds to token kinds. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +enum Class { + Comment, + DocComment, + Attribute, + KeyWord, + // Keywords that do pointer/reference stuff. + RefKeyWord, + Self_(Span), + Op, + Macro(Span), + MacroNonTerminal, + String, + Number, + Bool, + Ident(Span), + Lifetime, + PreludeTy, + PreludeVal, + QuestionMark, + Decoration(&'static str), +} + +impl Class { + /// Returns the css class expected by rustdoc for each `Class`. + fn as_html(self) -> &'static str { + match self { + Class::Comment => "comment", + Class::DocComment => "doccomment", + Class::Attribute => "attribute", + Class::KeyWord => "kw", + Class::RefKeyWord => "kw-2", + Class::Self_(_) => "self", + Class::Op => "op", + Class::Macro(_) => "macro", + Class::MacroNonTerminal => "macro-nonterminal", + Class::String => "string", + Class::Number => "number", + Class::Bool => "bool-val", + Class::Ident(_) => "ident", + Class::Lifetime => "lifetime", + Class::PreludeTy => "prelude-ty", + Class::PreludeVal => "prelude-val", + Class::QuestionMark => "question-mark", + Class::Decoration(kind) => kind, + } + } + + /// In case this is an item which can be converted into a link to a definition, it'll contain + /// a "span" (a tuple representing `(lo, hi)` equivalent of `Span`). + fn get_span(self) -> Option<Span> { + match self { + Self::Ident(sp) | Self::Self_(sp) | Self::Macro(sp) => Some(sp), + Self::Comment + | Self::DocComment + | Self::Attribute + | Self::KeyWord + | Self::RefKeyWord + | Self::Op + | Self::MacroNonTerminal + | Self::String + | Self::Number + | Self::Bool + | Self::Lifetime + | Self::PreludeTy + | Self::PreludeVal + | Self::QuestionMark + | Self::Decoration(_) => None, + } + } +} + +enum Highlight<'a> { + Token { text: &'a str, class: Option<Class> }, + EnterSpan { class: Class }, + ExitSpan, +} + +struct TokenIter<'a> { + src: &'a str, +} + +impl<'a> Iterator for TokenIter<'a> { + type Item = (TokenKind, &'a str); + fn next(&mut self) -> Option<(TokenKind, &'a str)> { + if self.src.is_empty() { + return None; + } + let token = rustc_lexer::first_token(self.src); + let (text, rest) = self.src.split_at(token.len as usize); + self.src = rest; + Some((token.kind, text)) + } +} + +/// Classifies into identifier class; returns `None` if this is a non-keyword identifier. +fn get_real_ident_class(text: &str, edition: Edition, allow_path_keywords: bool) -> Option<Class> { + let ignore: &[&str] = + if allow_path_keywords { &["self", "Self", "super", "crate"] } else { &["self", "Self"] }; + if ignore.iter().any(|k| *k == text) { + return None; + } + Some(match text { + "ref" | "mut" => Class::RefKeyWord, + "false" | "true" => Class::Bool, + _ if Symbol::intern(text).is_reserved(|| edition) => Class::KeyWord, + _ => return None, + }) +} + +/// This iterator comes from the same idea than "Peekable" except that it allows to "peek" more than +/// just the next item by using `peek_next`. The `peek` method always returns the next item after +/// the current one whereas `peek_next` will return the next item after the last one peeked. +/// +/// You can use both `peek` and `peek_next` at the same time without problem. +struct PeekIter<'a> { + stored: VecDeque<(TokenKind, &'a str)>, + /// This position is reinitialized when using `next`. It is used in `peek_next`. + peek_pos: usize, + iter: TokenIter<'a>, +} + +impl<'a> PeekIter<'a> { + fn new(iter: TokenIter<'a>) -> Self { + Self { stored: VecDeque::new(), peek_pos: 0, iter } + } + /// Returns the next item after the current one. It doesn't interfer with `peek_next` output. + fn peek(&mut self) -> Option<&(TokenKind, &'a str)> { + if self.stored.is_empty() { + if let Some(next) = self.iter.next() { + self.stored.push_back(next); + } + } + self.stored.front() + } + /// Returns the next item after the last one peeked. It doesn't interfer with `peek` output. + fn peek_next(&mut self) -> Option<&(TokenKind, &'a str)> { + self.peek_pos += 1; + if self.peek_pos - 1 < self.stored.len() { + self.stored.get(self.peek_pos - 1) + } else if let Some(next) = self.iter.next() { + self.stored.push_back(next); + self.stored.back() + } else { + None + } + } +} + +impl<'a> Iterator for PeekIter<'a> { + type Item = (TokenKind, &'a str); + fn next(&mut self) -> Option<Self::Item> { + self.peek_pos = 0; + if let Some(first) = self.stored.pop_front() { Some(first) } else { self.iter.next() } + } +} + +/// Custom spans inserted into the source. Eg --scrape-examples uses this to highlight function calls +struct Decorations { + starts: Vec<(u32, &'static str)>, + ends: Vec<u32>, +} + +impl Decorations { + fn new(info: DecorationInfo) -> Self { + // Extract tuples (start, end, kind) into separate sequences of (start, kind) and (end). + let (mut starts, mut ends): (Vec<_>, Vec<_>) = info + .0 + .into_iter() + .flat_map(|(kind, ranges)| ranges.into_iter().map(move |(lo, hi)| ((lo, kind), hi))) + .unzip(); + + // Sort the sequences in document order. + starts.sort_by_key(|(lo, _)| *lo); + ends.sort(); + + Decorations { starts, ends } + } +} + +/// Processes program tokens, classifying strings of text by highlighting +/// category (`Class`). +struct Classifier<'a> { + tokens: PeekIter<'a>, + in_attribute: bool, + in_macro: bool, + in_macro_nonterminal: bool, + edition: Edition, + byte_pos: u32, + file_span: Span, + src: &'a str, + decorations: Option<Decorations>, +} + +impl<'a> Classifier<'a> { + /// Takes as argument the source code to HTML-ify, the rust edition to use and the source code + /// file span which will be used later on by the `span_correspondance_map`. + fn new( + src: &str, + edition: Edition, + file_span: Span, + decoration_info: Option<DecorationInfo>, + ) -> Classifier<'_> { + let tokens = PeekIter::new(TokenIter { src }); + let decorations = decoration_info.map(Decorations::new); + Classifier { + tokens, + in_attribute: false, + in_macro: false, + in_macro_nonterminal: false, + edition, + byte_pos: 0, + file_span, + src, + decorations, + } + } + + /// Convenient wrapper to create a [`Span`] from a position in the file. + fn new_span(&self, lo: u32, text: &str) -> Span { + let hi = lo + text.len() as u32; + let file_lo = self.file_span.lo(); + self.file_span.with_lo(file_lo + BytePos(lo)).with_hi(file_lo + BytePos(hi)) + } + + /// Concatenate colons and idents as one when possible. + fn get_full_ident_path(&mut self) -> Vec<(TokenKind, usize, usize)> { + let start = self.byte_pos as usize; + let mut pos = start; + let mut has_ident = false; + let edition = self.edition; + + loop { + let mut nb = 0; + while let Some((TokenKind::Colon, _)) = self.tokens.peek() { + self.tokens.next(); + nb += 1; + } + // Ident path can start with "::" but if we already have content in the ident path, + // the "::" is mandatory. + if has_ident && nb == 0 { + return vec![(TokenKind::Ident, start, pos)]; + } else if nb != 0 && nb != 2 { + if has_ident { + return vec![(TokenKind::Ident, start, pos), (TokenKind::Colon, pos, pos + nb)]; + } else { + return vec![(TokenKind::Colon, start, pos + nb)]; + } + } + + if let Some((None, text)) = self.tokens.peek().map(|(token, text)| { + if *token == TokenKind::Ident { + let class = get_real_ident_class(text, edition, true); + (class, text) + } else { + // Doesn't matter which Class we put in here... + (Some(Class::Comment), text) + } + }) { + // We only "add" the colon if there is an ident behind. + pos += text.len() + nb; + has_ident = true; + self.tokens.next(); + } else if nb > 0 && has_ident { + return vec![(TokenKind::Ident, start, pos), (TokenKind::Colon, pos, pos + nb)]; + } else if nb > 0 { + return vec![(TokenKind::Colon, start, start + nb)]; + } else if has_ident { + return vec![(TokenKind::Ident, start, pos)]; + } else { + return Vec::new(); + } + } + } + + /// Wraps the tokens iteration to ensure that the `byte_pos` is always correct. + /// + /// It returns the token's kind, the token as a string and its byte position in the source + /// string. + fn next(&mut self) -> Option<(TokenKind, &'a str, u32)> { + if let Some((kind, text)) = self.tokens.next() { + let before = self.byte_pos; + self.byte_pos += text.len() as u32; + Some((kind, text, before)) + } else { + None + } + } + + /// Exhausts the `Classifier` writing the output into `sink`. + /// + /// The general structure for this method is to iterate over each token, + /// possibly giving it an HTML span with a class specifying what flavor of + /// token is used. + fn highlight(mut self, sink: &mut dyn FnMut(Highlight<'a>)) { + loop { + if let Some(decs) = self.decorations.as_mut() { + let byte_pos = self.byte_pos; + let n_starts = decs.starts.iter().filter(|(i, _)| byte_pos >= *i).count(); + for (_, kind) in decs.starts.drain(0..n_starts) { + sink(Highlight::EnterSpan { class: Class::Decoration(kind) }); + } + + let n_ends = decs.ends.iter().filter(|i| byte_pos >= **i).count(); + for _ in decs.ends.drain(0..n_ends) { + sink(Highlight::ExitSpan); + } + } + + if self + .tokens + .peek() + .map(|t| matches!(t.0, TokenKind::Colon | TokenKind::Ident)) + .unwrap_or(false) + { + let tokens = self.get_full_ident_path(); + for (token, start, end) in &tokens { + let text = &self.src[*start..*end]; + self.advance(*token, text, sink, *start as u32); + self.byte_pos += text.len() as u32; + } + if !tokens.is_empty() { + continue; + } + } + if let Some((token, text, before)) = self.next() { + self.advance(token, text, sink, before); + } else { + break; + } + } + } + + /// Single step of highlighting. This will classify `token`, but maybe also a couple of + /// following ones as well. + /// + /// `before` is the position of the given token in the `source` string and is used as "lo" byte + /// in case we want to try to generate a link for this token using the + /// `span_correspondance_map`. + fn advance( + &mut self, + token: TokenKind, + text: &'a str, + sink: &mut dyn FnMut(Highlight<'a>), + before: u32, + ) { + let lookahead = self.peek(); + let no_highlight = |sink: &mut dyn FnMut(_)| sink(Highlight::Token { text, class: None }); + let class = match token { + TokenKind::Whitespace => return no_highlight(sink), + TokenKind::LineComment { doc_style } | TokenKind::BlockComment { doc_style, .. } => { + if doc_style.is_some() { + Class::DocComment + } else { + Class::Comment + } + } + // Consider this as part of a macro invocation if there was a + // leading identifier. + TokenKind::Bang if self.in_macro => { + self.in_macro = false; + sink(Highlight::Token { text, class: None }); + sink(Highlight::ExitSpan); + return; + } + + // Assume that '&' or '*' is the reference or dereference operator + // or a reference or pointer type. Unless, of course, it looks like + // a logical and or a multiplication operator: `&&` or `* `. + TokenKind::Star => match self.tokens.peek() { + Some((TokenKind::Whitespace, _)) => Class::Op, + Some((TokenKind::Ident, "mut")) => { + self.next(); + sink(Highlight::Token { text: "*mut", class: Some(Class::RefKeyWord) }); + return; + } + Some((TokenKind::Ident, "const")) => { + self.next(); + sink(Highlight::Token { text: "*const", class: Some(Class::RefKeyWord) }); + return; + } + _ => Class::RefKeyWord, + }, + TokenKind::And => match self.tokens.peek() { + Some((TokenKind::And, _)) => { + self.next(); + sink(Highlight::Token { text: "&&", class: Some(Class::Op) }); + return; + } + Some((TokenKind::Eq, _)) => { + self.next(); + sink(Highlight::Token { text: "&=", class: Some(Class::Op) }); + return; + } + Some((TokenKind::Whitespace, _)) => Class::Op, + Some((TokenKind::Ident, "mut")) => { + self.next(); + sink(Highlight::Token { text: "&mut", class: Some(Class::RefKeyWord) }); + return; + } + _ => Class::RefKeyWord, + }, + + // These can either be operators, or arrows. + TokenKind::Eq => match lookahead { + Some(TokenKind::Eq) => { + self.next(); + sink(Highlight::Token { text: "==", class: Some(Class::Op) }); + return; + } + Some(TokenKind::Gt) => { + self.next(); + sink(Highlight::Token { text: "=>", class: None }); + return; + } + _ => Class::Op, + }, + TokenKind::Minus if lookahead == Some(TokenKind::Gt) => { + self.next(); + sink(Highlight::Token { text: "->", class: None }); + return; + } + + // Other operators. + TokenKind::Minus + | TokenKind::Plus + | TokenKind::Or + | TokenKind::Slash + | TokenKind::Caret + | TokenKind::Percent + | TokenKind::Bang + | TokenKind::Lt + | TokenKind::Gt => Class::Op, + + // Miscellaneous, no highlighting. + TokenKind::Dot + | TokenKind::Semi + | TokenKind::Comma + | TokenKind::OpenParen + | TokenKind::CloseParen + | TokenKind::OpenBrace + | TokenKind::CloseBrace + | TokenKind::OpenBracket + | TokenKind::At + | TokenKind::Tilde + | TokenKind::Colon + | TokenKind::Unknown => return no_highlight(sink), + + TokenKind::Question => Class::QuestionMark, + + TokenKind::Dollar => match lookahead { + Some(TokenKind::Ident) => { + self.in_macro_nonterminal = true; + Class::MacroNonTerminal + } + _ => return no_highlight(sink), + }, + + // This might be the start of an attribute. We're going to want to + // continue highlighting it as an attribute until the ending ']' is + // seen, so skip out early. Down below we terminate the attribute + // span when we see the ']'. + TokenKind::Pound => { + match lookahead { + // Case 1: #![inner_attribute] + Some(TokenKind::Bang) => { + self.next(); + if let Some(TokenKind::OpenBracket) = self.peek() { + self.in_attribute = true; + sink(Highlight::EnterSpan { class: Class::Attribute }); + } + sink(Highlight::Token { text: "#", class: None }); + sink(Highlight::Token { text: "!", class: None }); + return; + } + // Case 2: #[outer_attribute] + Some(TokenKind::OpenBracket) => { + self.in_attribute = true; + sink(Highlight::EnterSpan { class: Class::Attribute }); + } + _ => (), + } + return no_highlight(sink); + } + TokenKind::CloseBracket => { + if self.in_attribute { + self.in_attribute = false; + sink(Highlight::Token { text: "]", class: None }); + sink(Highlight::ExitSpan); + return; + } + return no_highlight(sink); + } + TokenKind::Literal { kind, .. } => match kind { + // Text literals. + LiteralKind::Byte { .. } + | LiteralKind::Char { .. } + | LiteralKind::Str { .. } + | LiteralKind::ByteStr { .. } + | LiteralKind::RawStr { .. } + | LiteralKind::RawByteStr { .. } => Class::String, + // Number literals. + LiteralKind::Float { .. } | LiteralKind::Int { .. } => Class::Number, + }, + TokenKind::Ident | TokenKind::RawIdent if lookahead == Some(TokenKind::Bang) => { + self.in_macro = true; + sink(Highlight::EnterSpan { class: Class::Macro(self.new_span(before, text)) }); + sink(Highlight::Token { text, class: None }); + return; + } + TokenKind::Ident => match get_real_ident_class(text, self.edition, false) { + None => match text { + "Option" | "Result" => Class::PreludeTy, + "Some" | "None" | "Ok" | "Err" => Class::PreludeVal, + // "union" is a weak keyword and is only considered as a keyword when declaring + // a union type. + "union" if self.check_if_is_union_keyword() => Class::KeyWord, + _ if self.in_macro_nonterminal => { + self.in_macro_nonterminal = false; + Class::MacroNonTerminal + } + "self" | "Self" => Class::Self_(self.new_span(before, text)), + _ => Class::Ident(self.new_span(before, text)), + }, + Some(c) => c, + }, + TokenKind::RawIdent | TokenKind::UnknownPrefix | TokenKind::InvalidIdent => { + Class::Ident(self.new_span(before, text)) + } + TokenKind::Lifetime { .. } => Class::Lifetime, + }; + // Anything that didn't return above is the simple case where we the + // class just spans a single token, so we can use the `string` method. + sink(Highlight::Token { text, class: Some(class) }); + } + + fn peek(&mut self) -> Option<TokenKind> { + self.tokens.peek().map(|(token_kind, _text)| *token_kind) + } + + fn check_if_is_union_keyword(&mut self) -> bool { + while let Some(kind) = self.tokens.peek_next().map(|(token_kind, _text)| token_kind) { + if *kind == TokenKind::Whitespace { + continue; + } + return *kind == TokenKind::Ident; + } + false + } +} + +/// Called when we start processing a span of text that should be highlighted. +/// The `Class` argument specifies how it should be highlighted. +fn enter_span( + out: &mut Buffer, + klass: Class, + href_context: &Option<HrefContext<'_, '_, '_>>, +) -> &'static str { + string_without_closing_tag(out, "", Some(klass), href_context).expect( + "internal error: enter_span was called with Some(klass) but did not return a \ + closing HTML tag", + ) +} + +/// Called at the end of a span of highlighted text. +fn exit_span(out: &mut Buffer, closing_tag: &str) { + out.write_str(closing_tag); +} + +/// Called for a span of text. If the text should be highlighted differently +/// from the surrounding text, then the `Class` argument will be a value other +/// than `None`. +/// +/// The following sequences of callbacks are equivalent: +/// ```plain +/// enter_span(Foo), string("text", None), exit_span() +/// string("text", Foo) +/// ``` +/// +/// The latter can be thought of as a shorthand for the former, which is more +/// flexible. +/// +/// Note that if `context` is not `None` and that the given `klass` contains a `Span`, the function +/// will then try to find this `span` in the `span_correspondance_map`. If found, it'll then +/// generate a link for this element (which corresponds to where its definition is located). +fn string<T: Display>( + out: &mut Buffer, + text: T, + klass: Option<Class>, + href_context: &Option<HrefContext<'_, '_, '_>>, +) { + if let Some(closing_tag) = string_without_closing_tag(out, text, klass, href_context) { + out.write_str(closing_tag); + } +} + +/// This function writes `text` into `out` with some modifications depending on `klass`: +/// +/// * If `klass` is `None`, `text` is written into `out` with no modification. +/// * If `klass` is `Some` but `klass.get_span()` is `None`, it writes the text wrapped in a +/// `<span>` with the provided `klass`. +/// * If `klass` is `Some` and has a [`rustc_span::Span`], it then tries to generate a link (`<a>` +/// element) by retrieving the link information from the `span_correspondance_map` that was filled +/// in `span_map.rs::collect_spans_and_sources`. If it cannot retrieve the information, then it's +/// the same as the second point (`klass` is `Some` but doesn't have a [`rustc_span::Span`]). +fn string_without_closing_tag<T: Display>( + out: &mut Buffer, + text: T, + klass: Option<Class>, + href_context: &Option<HrefContext<'_, '_, '_>>, +) -> Option<&'static str> { + let Some(klass) = klass + else { + write!(out, "{}", text); + return None; + }; + let Some(def_span) = klass.get_span() + else { + write!(out, "<span class=\"{}\">{}", klass.as_html(), text); + return Some("</span>"); + }; + + let mut text_s = text.to_string(); + if text_s.contains("::") { + text_s = text_s.split("::").intersperse("::").fold(String::new(), |mut path, t| { + match t { + "self" | "Self" => write!( + &mut path, + "<span class=\"{}\">{}</span>", + Class::Self_(DUMMY_SP).as_html(), + t + ), + "crate" | "super" => { + write!(&mut path, "<span class=\"{}\">{}</span>", Class::KeyWord.as_html(), t) + } + t => write!(&mut path, "{}", t), + } + .expect("Failed to build source HTML path"); + path + }); + } + if let Some(href_context) = href_context { + if let Some(href) = + href_context.context.shared.span_correspondance_map.get(&def_span).and_then(|href| { + let context = href_context.context; + // FIXME: later on, it'd be nice to provide two links (if possible) for all items: + // one to the documentation page and one to the source definition. + // FIXME: currently, external items only generate a link to their documentation, + // a link to their definition can be generated using this: + // https://github.com/rust-lang/rust/blob/60f1a2fc4b535ead9c85ce085fdce49b1b097531/src/librustdoc/html/render/context.rs#L315-L338 + match href { + LinkFromSrc::Local(span) => context + .href_from_span(*span, true) + .map(|s| format!("{}{}", href_context.root_path, s)), + LinkFromSrc::External(def_id) => { + format::href_with_root_path(*def_id, context, Some(href_context.root_path)) + .ok() + .map(|(url, _, _)| url) + } + LinkFromSrc::Primitive(prim) => format::href_with_root_path( + PrimitiveType::primitive_locations(context.tcx())[prim], + context, + Some(href_context.root_path), + ) + .ok() + .map(|(url, _, _)| url), + } + }) + { + write!(out, "<a class=\"{}\" href=\"{}\">{}", klass.as_html(), href, text_s); + return Some("</a>"); + } + } + write!(out, "<span class=\"{}\">{}", klass.as_html(), text_s); + Some("</span>") +} + +#[cfg(test)] +mod tests; diff --git a/src/librustdoc/html/highlight/fixtures/decorations.html b/src/librustdoc/html/highlight/fixtures/decorations.html new file mode 100644 index 000000000..45f567880 --- /dev/null +++ b/src/librustdoc/html/highlight/fixtures/decorations.html @@ -0,0 +1,2 @@ +<span class="example"><span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="number">1</span>;</span> +<span class="kw">let</span> <span class="ident">y</span> <span class="op">=</span> <span class="number">2</span>;
\ No newline at end of file diff --git a/src/librustdoc/html/highlight/fixtures/dos_line.html b/src/librustdoc/html/highlight/fixtures/dos_line.html new file mode 100644 index 000000000..1c8dbffe7 --- /dev/null +++ b/src/librustdoc/html/highlight/fixtures/dos_line.html @@ -0,0 +1,3 @@ +<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">foo</span>() { +<span class="macro">println!</span>(<span class="string">"foo"</span>); +} diff --git a/src/librustdoc/html/highlight/fixtures/highlight.html b/src/librustdoc/html/highlight/fixtures/highlight.html new file mode 100644 index 000000000..abc2db179 --- /dev/null +++ b/src/librustdoc/html/highlight/fixtures/highlight.html @@ -0,0 +1,4 @@ +<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::a::foo</span>; +<span class="kw">use</span> <span class="ident"><span class="self">self</span>::whatever</span>; +<span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="ident"><span class="kw">super</span>::b::foo</span>; +<span class="kw">let</span> <span class="ident">y</span> <span class="op">=</span> <span class="ident"><span class="self">Self</span>::whatever</span>;
\ No newline at end of file diff --git a/src/librustdoc/html/highlight/fixtures/sample.html b/src/librustdoc/html/highlight/fixtures/sample.html new file mode 100644 index 000000000..b117a12e3 --- /dev/null +++ b/src/librustdoc/html/highlight/fixtures/sample.html @@ -0,0 +1,37 @@ + +<style> +.kw { color: #8959A8; } +.kw-2, .prelude-ty { color: #4271AE; } +.number, .string { color: #718C00; } +.self, .bool-val, .prelude-val, .attribute, .attribute .ident { color: #C82829; } +.macro, .macro-nonterminal { color: #3E999F; } +.lifetime { color: #B76514; } +.question-mark { color: #ff9011; } +</style> +<pre><code><span class="attribute">#![<span class="ident">crate_type</span> <span class="op">=</span> <span class="string">"lib"</span>]</span> + +<span class="kw">use</span> <span class="ident">std::path</span>::{<span class="ident">Path</span>, <span class="ident">PathBuf</span>}; + +<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_os</span> <span class="op">=</span> <span class="string">"linux"</span>)]</span> +<span class="kw">fn</span> <span class="ident">main</span>() -> () { + <span class="kw">let</span> <span class="ident">foo</span> <span class="op">=</span> <span class="bool-val">true</span> <span class="op">&&</span> <span class="bool-val">false</span> <span class="op">|</span><span class="op">|</span> <span class="bool-val">true</span>; + <span class="kw">let</span> <span class="kw">_</span>: <span class="kw-2">*const</span> () <span class="op">=</span> <span class="number">0</span>; + <span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">foo</span>; + <span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="op">&&</span><span class="ident">foo</span>; + <span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="kw-2">*</span><span class="ident">foo</span>; + <span class="macro">mac!</span>(<span class="ident">foo</span>, <span class="kw-2">&mut</span> <span class="ident">bar</span>); + <span class="macro">assert!</span>(<span class="self">self</span>.<span class="ident">length</span> <span class="op"><</span> <span class="ident">N</span> <span class="op">&&</span> <span class="ident">index</span> <span class="op"><</span><span class="op">=</span> <span class="self">self</span>.<span class="ident">length</span>); + <span class="ident">::std::env::var</span>(<span class="string">"gateau"</span>).<span class="ident">is_ok</span>(); + <span class="attribute">#[<span class="ident">rustfmt::skip</span>]</span> + <span class="kw">let</span> <span class="ident">s</span>:<span class="ident">std::path::PathBuf</span> <span class="op">=</span> <span class="ident">std::path::PathBuf::new</span>(); + <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">String::new</span>(); + + <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">s</span> { + <span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">x</span> => {} + } +} + +<span class="macro">macro_rules!</span> <span class="ident">bar</span> { + (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">foo</span>:<span class="ident">tt</span>) => {}; +} +</code></pre> diff --git a/src/librustdoc/html/highlight/fixtures/sample.rs b/src/librustdoc/html/highlight/fixtures/sample.rs new file mode 100644 index 000000000..fbfdc6767 --- /dev/null +++ b/src/librustdoc/html/highlight/fixtures/sample.rs @@ -0,0 +1,26 @@ +#![crate_type = "lib"] + +use std::path::{Path, PathBuf}; + +#[cfg(target_os = "linux")] +fn main() -> () { + let foo = true && false || true; + let _: *const () = 0; + let _ = &foo; + let _ = &&foo; + let _ = *foo; + mac!(foo, &mut bar); + assert!(self.length < N && index <= self.length); + ::std::env::var("gateau").is_ok(); + #[rustfmt::skip] + let s:std::path::PathBuf = std::path::PathBuf::new(); + let mut s = String::new(); + + match &s { + ref mut x => {} + } +} + +macro_rules! bar { + ($foo:tt) => {}; +} diff --git a/src/librustdoc/html/highlight/fixtures/union.html b/src/librustdoc/html/highlight/fixtures/union.html new file mode 100644 index 000000000..c0acf31a0 --- /dev/null +++ b/src/librustdoc/html/highlight/fixtures/union.html @@ -0,0 +1,8 @@ +<span class="kw">union</span> <span class="ident">Foo</span> { + <span class="ident">i</span>: <span class="ident">i8</span>, + <span class="ident">u</span>: <span class="ident">i8</span>, +} + +<span class="kw">fn</span> <span class="ident">main</span>() { + <span class="kw">let</span> <span class="ident">union</span> <span class="op">=</span> <span class="number">0</span>; +} diff --git a/src/librustdoc/html/highlight/fixtures/union.rs b/src/librustdoc/html/highlight/fixtures/union.rs new file mode 100644 index 000000000..269ee115d --- /dev/null +++ b/src/librustdoc/html/highlight/fixtures/union.rs @@ -0,0 +1,8 @@ +union Foo { + i: i8, + u: i8, +} + +fn main() { + let union = 0; +} diff --git a/src/librustdoc/html/highlight/tests.rs b/src/librustdoc/html/highlight/tests.rs new file mode 100644 index 000000000..1fea7e983 --- /dev/null +++ b/src/librustdoc/html/highlight/tests.rs @@ -0,0 +1,81 @@ +use super::{write_code, DecorationInfo}; +use crate::html::format::Buffer; +use expect_test::expect_file; +use rustc_data_structures::fx::FxHashMap; +use rustc_span::create_default_session_globals_then; +use rustc_span::edition::Edition; + +const STYLE: &str = r#" +<style> +.kw { color: #8959A8; } +.kw-2, .prelude-ty { color: #4271AE; } +.number, .string { color: #718C00; } +.self, .bool-val, .prelude-val, .attribute, .attribute .ident { color: #C82829; } +.macro, .macro-nonterminal { color: #3E999F; } +.lifetime { color: #B76514; } +.question-mark { color: #ff9011; } +</style> +"#; + +#[test] +fn test_html_highlighting() { + create_default_session_globals_then(|| { + let src = include_str!("fixtures/sample.rs"); + let html = { + let mut out = Buffer::new(); + write_code(&mut out, src, Edition::Edition2018, None, None); + format!("{}<pre><code>{}</code></pre>\n", STYLE, out.into_inner()) + }; + expect_file!["fixtures/sample.html"].assert_eq(&html); + }); +} + +#[test] +fn test_dos_backline() { + create_default_session_globals_then(|| { + let src = "pub fn foo() {\r\n\ + println!(\"foo\");\r\n\ +}\r\n"; + let mut html = Buffer::new(); + write_code(&mut html, src, Edition::Edition2018, None, None); + expect_file!["fixtures/dos_line.html"].assert_eq(&html.into_inner()); + }); +} + +#[test] +fn test_keyword_highlight() { + create_default_session_globals_then(|| { + let src = "use crate::a::foo; +use self::whatever; +let x = super::b::foo; +let y = Self::whatever;"; + + let mut html = Buffer::new(); + write_code(&mut html, src, Edition::Edition2018, None, None); + expect_file!["fixtures/highlight.html"].assert_eq(&html.into_inner()); + }); +} + +#[test] +fn test_union_highlighting() { + create_default_session_globals_then(|| { + let src = include_str!("fixtures/union.rs"); + let mut html = Buffer::new(); + write_code(&mut html, src, Edition::Edition2018, None, None); + expect_file!["fixtures/union.html"].assert_eq(&html.into_inner()); + }); +} + +#[test] +fn test_decorations() { + create_default_session_globals_then(|| { + let src = "let x = 1; +let y = 2;"; + let mut decorations = FxHashMap::default(); + decorations.insert("example", vec![(0, 10)]); + + let mut html = Buffer::new(); + write_code(&mut html, src, Edition::Edition2018, None, Some(DecorationInfo(decorations))); + expect_file!["fixtures/decorations.html"].assert_eq(&html.into_inner()); + }); +} diff --git a/src/librustdoc/html/layout.rs b/src/librustdoc/html/layout.rs new file mode 100644 index 000000000..7d6d4b71e --- /dev/null +++ b/src/librustdoc/html/layout.rs @@ -0,0 +1,103 @@ +use std::path::PathBuf; + +use rustc_data_structures::fx::FxHashMap; + +use crate::error::Error; +use crate::externalfiles::ExternalHtml; +use crate::html::format::{Buffer, Print}; +use crate::html::render::{ensure_trailing_slash, StylePath}; + +use askama::Template; + +#[derive(Clone)] +pub(crate) struct Layout { + pub(crate) logo: String, + pub(crate) favicon: String, + pub(crate) external_html: ExternalHtml, + pub(crate) default_settings: FxHashMap<String, String>, + pub(crate) krate: String, + /// The given user css file which allow to customize the generated + /// documentation theme. + pub(crate) css_file_extension: Option<PathBuf>, + /// If true, then scrape-examples.js will be included in the output HTML file + pub(crate) scrape_examples_extension: bool, +} + +pub(crate) struct Page<'a> { + pub(crate) title: &'a str, + pub(crate) css_class: &'a str, + pub(crate) root_path: &'a str, + pub(crate) static_root_path: Option<&'a str>, + pub(crate) description: &'a str, + pub(crate) keywords: &'a str, + pub(crate) resource_suffix: &'a str, +} + +impl<'a> Page<'a> { + pub(crate) fn get_static_root_path(&self) -> &str { + self.static_root_path.unwrap_or(self.root_path) + } +} + +#[derive(Template)] +#[template(path = "page.html")] +struct PageLayout<'a> { + static_root_path: &'a str, + page: &'a Page<'a>, + layout: &'a Layout, + themes: Vec<String>, + sidebar: String, + content: String, + krate_with_trailing_slash: String, + pub(crate) rustdoc_version: &'a str, +} + +pub(crate) fn render<T: Print, S: Print>( + layout: &Layout, + page: &Page<'_>, + sidebar: S, + t: T, + style_files: &[StylePath], +) -> String { + let static_root_path = page.get_static_root_path(); + let krate_with_trailing_slash = ensure_trailing_slash(&layout.krate).to_string(); + let mut themes: Vec<String> = style_files + .iter() + .map(StylePath::basename) + .collect::<Result<_, Error>>() + .unwrap_or_default(); + themes.sort(); + let rustdoc_version = rustc_interface::util::version_str().unwrap_or("unknown version"); + let content = Buffer::html().to_display(t); // Note: This must happen before making the sidebar. + let sidebar = Buffer::html().to_display(sidebar); + PageLayout { + static_root_path, + page, + layout, + themes, + sidebar, + content, + krate_with_trailing_slash, + rustdoc_version, + } + .render() + .unwrap() +} + +pub(crate) fn redirect(url: &str) -> String { + // <script> triggers a redirect before refresh, so this is fine. + format!( + r##"<!DOCTYPE html> +<html lang="en"> +<head> + <meta http-equiv="refresh" content="0;URL={url}"> + <title>Redirection</title> +</head> +<body> + <p>Redirecting to <a href="{url}">{url}</a>...</p> + <script>location.replace("{url}" + location.search + location.hash);</script> +</body> +</html>"##, + url = url, + ) +} diff --git a/src/librustdoc/html/length_limit.rs b/src/librustdoc/html/length_limit.rs new file mode 100644 index 000000000..bbdc91c8d --- /dev/null +++ b/src/librustdoc/html/length_limit.rs @@ -0,0 +1,119 @@ +//! See [`HtmlWithLimit`]. + +use std::fmt::Write; +use std::ops::ControlFlow; + +use crate::html::escape::Escape; + +/// A buffer that allows generating HTML with a length limit. +/// +/// This buffer ensures that: +/// +/// * all tags are closed, +/// * tags are closed in the reverse order of when they were opened (i.e., the correct HTML order), +/// * no tags are left empty (e.g., `<em></em>`) due to the length limit being reached, +/// * all text is escaped. +#[derive(Debug)] +pub(super) struct HtmlWithLimit { + buf: String, + len: usize, + limit: usize, + /// A list of tags that have been requested to be opened via [`Self::open_tag()`] + /// but have not actually been pushed to `buf` yet. This ensures that tags are not + /// left empty (e.g., `<em></em>`) due to the length limit being reached. + queued_tags: Vec<&'static str>, + /// A list of all tags that have been opened but not yet closed. + unclosed_tags: Vec<&'static str>, +} + +impl HtmlWithLimit { + /// Create a new buffer, with a limit of `length_limit`. + pub(super) fn new(length_limit: usize) -> Self { + let buf = if length_limit > 1000 { + // If the length limit is really large, don't preallocate tons of memory. + String::new() + } else { + // The length limit is actually a good heuristic for initial allocation size. + // Measurements showed that using it as the initial capacity ended up using less memory + // than `String::new`. + // See https://github.com/rust-lang/rust/pull/88173#discussion_r692531631 for more. + String::with_capacity(length_limit) + }; + Self { + buf, + len: 0, + limit: length_limit, + unclosed_tags: Vec::new(), + queued_tags: Vec::new(), + } + } + + /// Finish using the buffer and get the written output. + /// This function will close all unclosed tags for you. + pub(super) fn finish(mut self) -> String { + self.close_all_tags(); + self.buf + } + + /// Write some plain text to the buffer, escaping as needed. + /// + /// This function skips writing the text if the length limit was reached + /// and returns [`ControlFlow::Break`]. + pub(super) fn push(&mut self, text: &str) -> ControlFlow<(), ()> { + if self.len + text.len() > self.limit { + return ControlFlow::BREAK; + } + + self.flush_queue(); + write!(self.buf, "{}", Escape(text)).unwrap(); + self.len += text.len(); + + ControlFlow::CONTINUE + } + + /// Open an HTML tag. + /// + /// **Note:** HTML attributes have not yet been implemented. + /// This function will panic if called with a non-alphabetic `tag_name`. + pub(super) fn open_tag(&mut self, tag_name: &'static str) { + assert!( + tag_name.chars().all(|c| ('a'..='z').contains(&c)), + "tag_name contained non-alphabetic chars: {:?}", + tag_name + ); + self.queued_tags.push(tag_name); + } + + /// Close the most recently opened HTML tag. + pub(super) fn close_tag(&mut self) { + match self.unclosed_tags.pop() { + // Close the most recently opened tag. + Some(tag_name) => write!(self.buf, "</{}>", tag_name).unwrap(), + // There are valid cases where `close_tag()` is called without + // there being any tags to close. For example, this occurs when + // a tag is opened after the length limit is exceeded; + // `flush_queue()` will never be called, and thus, the tag will + // not end up being added to `unclosed_tags`. + None => {} + } + } + + /// Write all queued tags and add them to the `unclosed_tags` list. + fn flush_queue(&mut self) { + for tag_name in self.queued_tags.drain(..) { + write!(self.buf, "<{}>", tag_name).unwrap(); + + self.unclosed_tags.push(tag_name); + } + } + + /// Close all unclosed tags. + fn close_all_tags(&mut self) { + while !self.unclosed_tags.is_empty() { + self.close_tag(); + } + } +} + +#[cfg(test)] +mod tests; diff --git a/src/librustdoc/html/length_limit/tests.rs b/src/librustdoc/html/length_limit/tests.rs new file mode 100644 index 000000000..2d02b8a16 --- /dev/null +++ b/src/librustdoc/html/length_limit/tests.rs @@ -0,0 +1,120 @@ +use super::*; + +#[test] +fn empty() { + assert_eq!(HtmlWithLimit::new(0).finish(), ""); + assert_eq!(HtmlWithLimit::new(60).finish(), ""); +} + +#[test] +fn basic() { + let mut buf = HtmlWithLimit::new(60); + buf.push("Hello "); + buf.open_tag("em"); + buf.push("world"); + buf.close_tag(); + buf.push("!"); + assert_eq!(buf.finish(), "Hello <em>world</em>!"); +} + +#[test] +fn no_tags() { + let mut buf = HtmlWithLimit::new(60); + buf.push("Hello"); + buf.push(" world!"); + assert_eq!(buf.finish(), "Hello world!"); +} + +#[test] +fn limit_0() { + let mut buf = HtmlWithLimit::new(0); + buf.push("Hello "); + buf.open_tag("em"); + buf.push("world"); + buf.close_tag(); + buf.push("!"); + assert_eq!(buf.finish(), ""); +} + +#[test] +fn exactly_limit() { + let mut buf = HtmlWithLimit::new(12); + buf.push("Hello "); + buf.open_tag("em"); + buf.push("world"); + buf.close_tag(); + buf.push("!"); + assert_eq!(buf.finish(), "Hello <em>world</em>!"); +} + +#[test] +fn multiple_nested_tags() { + let mut buf = HtmlWithLimit::new(60); + buf.open_tag("p"); + buf.push("This is a "); + buf.open_tag("em"); + buf.push("paragraph"); + buf.open_tag("strong"); + buf.push("!"); + buf.close_tag(); + buf.close_tag(); + buf.close_tag(); + assert_eq!(buf.finish(), "<p>This is a <em>paragraph<strong>!</strong></em></p>"); +} + +#[test] +fn forgot_to_close_tags() { + let mut buf = HtmlWithLimit::new(60); + buf.open_tag("p"); + buf.push("This is a "); + buf.open_tag("em"); + buf.push("paragraph"); + buf.open_tag("strong"); + buf.push("!"); + assert_eq!(buf.finish(), "<p>This is a <em>paragraph<strong>!</strong></em></p>"); +} + +#[test] +fn past_the_limit() { + let mut buf = HtmlWithLimit::new(20); + buf.open_tag("p"); + (0..10).try_for_each(|n| { + buf.open_tag("strong"); + buf.push("word#")?; + buf.push(&n.to_string())?; + buf.close_tag(); + ControlFlow::CONTINUE + }); + buf.close_tag(); + assert_eq!( + buf.finish(), + "<p>\ + <strong>word#0</strong>\ + <strong>word#1</strong>\ + <strong>word#2</strong>\ + </p>" + ); +} + +#[test] +fn quickly_past_the_limit() { + let mut buf = HtmlWithLimit::new(6); + buf.open_tag("p"); + buf.push("Hello"); + buf.push(" World"); + // intentionally not closing <p> before finishing + assert_eq!(buf.finish(), "<p>Hello</p>"); +} + +#[test] +fn close_too_many() { + let mut buf = HtmlWithLimit::new(60); + buf.open_tag("p"); + buf.push("Hello"); + buf.close_tag(); + // This call does not panic because there are valid cases + // where `close_tag()` is called with no tags left to close. + // So `close_tag()` does nothing in this case. + buf.close_tag(); + assert_eq!(buf.finish(), "<p>Hello</p>"); +} diff --git a/src/librustdoc/html/markdown.rs b/src/librustdoc/html/markdown.rs new file mode 100644 index 000000000..52a2effca --- /dev/null +++ b/src/librustdoc/html/markdown.rs @@ -0,0 +1,1510 @@ +//! Markdown formatting for rustdoc. +//! +//! This module implements markdown formatting through the pulldown-cmark library. +//! +//! ``` +//! #![feature(rustc_private)] +//! +//! extern crate rustc_span; +//! +//! use rustc_span::edition::Edition; +//! use rustdoc::html::markdown::{HeadingOffset, IdMap, Markdown, ErrorCodes}; +//! +//! let s = "My *markdown* _text_"; +//! let mut id_map = IdMap::new(); +//! let md = Markdown { +//! content: s, +//! links: &[], +//! ids: &mut id_map, +//! error_codes: ErrorCodes::Yes, +//! edition: Edition::Edition2015, +//! playground: &None, +//! heading_offset: HeadingOffset::H2, +//! }; +//! let html = md.into_string(); +//! // ... something using html +//! ``` + +use rustc_data_structures::fx::FxHashMap; +use rustc_hir::def_id::DefId; +use rustc_hir::HirId; +use rustc_middle::ty::TyCtxt; +use rustc_span::edition::Edition; +use rustc_span::Span; + +use once_cell::sync::Lazy; +use std::borrow::Cow; +use std::cell::RefCell; +use std::collections::VecDeque; +use std::default::Default; +use std::fmt::Write; +use std::ops::{ControlFlow, Range}; +use std::str; + +use crate::clean::RenderedLink; +use crate::doctest; +use crate::html::escape::Escape; +use crate::html::format::Buffer; +use crate::html::highlight; +use crate::html::length_limit::HtmlWithLimit; +use crate::html::toc::TocBuilder; + +use pulldown_cmark::{ + html, BrokenLink, CodeBlockKind, CowStr, Event, LinkType, Options, Parser, Tag, +}; + +#[cfg(test)] +mod tests; + +const MAX_HEADER_LEVEL: u32 = 6; + +/// Options for rendering Markdown in the main body of documentation. +pub(crate) fn main_body_opts() -> Options { + Options::ENABLE_TABLES + | Options::ENABLE_FOOTNOTES + | Options::ENABLE_STRIKETHROUGH + | Options::ENABLE_TASKLISTS + | Options::ENABLE_SMART_PUNCTUATION +} + +/// Options for rendering Markdown in summaries (e.g., in search results). +pub(crate) fn summary_opts() -> Options { + Options::ENABLE_TABLES + | Options::ENABLE_FOOTNOTES + | Options::ENABLE_STRIKETHROUGH + | Options::ENABLE_TASKLISTS + | Options::ENABLE_SMART_PUNCTUATION +} + +#[derive(Debug, Clone, Copy)] +pub enum HeadingOffset { + H1 = 0, + H2, + H3, + H4, + H5, + H6, +} + +/// When `to_string` is called, this struct will emit the HTML corresponding to +/// the rendered version of the contained markdown string. +pub struct Markdown<'a> { + pub content: &'a str, + /// A list of link replacements. + pub links: &'a [RenderedLink], + /// The current list of used header IDs. + pub ids: &'a mut IdMap, + /// Whether to allow the use of explicit error codes in doctest lang strings. + pub error_codes: ErrorCodes, + /// Default edition to use when parsing doctests (to add a `fn main`). + pub edition: Edition, + pub playground: &'a Option<Playground>, + /// Offset at which we render headings. + /// E.g. if `heading_offset: HeadingOffset::H2`, then `# something` renders an `<h2>`. + pub heading_offset: HeadingOffset, +} +/// A tuple struct like `Markdown` that renders the markdown with a table of contents. +pub(crate) struct MarkdownWithToc<'a>( + pub(crate) &'a str, + pub(crate) &'a mut IdMap, + pub(crate) ErrorCodes, + pub(crate) Edition, + pub(crate) &'a Option<Playground>, +); +/// A tuple struct like `Markdown` that renders the markdown escaping HTML tags. +pub(crate) struct MarkdownHtml<'a>( + pub(crate) &'a str, + pub(crate) &'a mut IdMap, + pub(crate) ErrorCodes, + pub(crate) Edition, + pub(crate) &'a Option<Playground>, +); +/// A tuple struct like `Markdown` that renders only the first paragraph. +pub(crate) struct MarkdownSummaryLine<'a>(pub &'a str, pub &'a [RenderedLink]); + +#[derive(Copy, Clone, PartialEq, Debug)] +pub enum ErrorCodes { + Yes, + No, +} + +impl ErrorCodes { + pub(crate) fn from(b: bool) -> Self { + match b { + true => ErrorCodes::Yes, + false => ErrorCodes::No, + } + } + + pub(crate) fn as_bool(self) -> bool { + match self { + ErrorCodes::Yes => true, + ErrorCodes::No => false, + } + } +} + +/// Controls whether a line will be hidden or shown in HTML output. +/// +/// All lines are used in documentation tests. +enum Line<'a> { + Hidden(&'a str), + Shown(Cow<'a, str>), +} + +impl<'a> Line<'a> { + fn for_html(self) -> Option<Cow<'a, str>> { + match self { + Line::Shown(l) => Some(l), + Line::Hidden(_) => None, + } + } + + fn for_code(self) -> Cow<'a, str> { + match self { + Line::Shown(l) => l, + Line::Hidden(l) => Cow::Borrowed(l), + } + } +} + +// FIXME: There is a minor inconsistency here. For lines that start with ##, we +// have no easy way of removing a potential single space after the hashes, which +// is done in the single # case. This inconsistency seems okay, if non-ideal. In +// order to fix it we'd have to iterate to find the first non-# character, and +// then reallocate to remove it; which would make us return a String. +fn map_line(s: &str) -> Line<'_> { + let trimmed = s.trim(); + if trimmed.starts_with("##") { + Line::Shown(Cow::Owned(s.replacen("##", "#", 1))) + } else if let Some(stripped) = trimmed.strip_prefix("# ") { + // # text + Line::Hidden(stripped) + } else if trimmed == "#" { + // We cannot handle '#text' because it could be #[attr]. + Line::Hidden("") + } else { + Line::Shown(Cow::Borrowed(s)) + } +} + +/// Convert chars from a title for an id. +/// +/// "Hello, world!" -> "hello-world" +fn slugify(c: char) -> Option<char> { + if c.is_alphanumeric() || c == '-' || c == '_' { + if c.is_ascii() { Some(c.to_ascii_lowercase()) } else { Some(c) } + } else if c.is_whitespace() && c.is_ascii() { + Some('-') + } else { + None + } +} + +#[derive(Clone, Debug)] +pub struct Playground { + pub crate_name: Option<String>, + pub url: String, +} + +/// Adds syntax highlighting and playground Run buttons to Rust code blocks. +struct CodeBlocks<'p, 'a, I: Iterator<Item = Event<'a>>> { + inner: I, + check_error_codes: ErrorCodes, + edition: Edition, + // Information about the playground if a URL has been specified, containing an + // optional crate name and the URL. + playground: &'p Option<Playground>, +} + +impl<'p, 'a, I: Iterator<Item = Event<'a>>> CodeBlocks<'p, 'a, I> { + fn new( + iter: I, + error_codes: ErrorCodes, + edition: Edition, + playground: &'p Option<Playground>, + ) -> Self { + CodeBlocks { inner: iter, check_error_codes: error_codes, edition, playground } + } +} + +impl<'a, I: Iterator<Item = Event<'a>>> Iterator for CodeBlocks<'_, 'a, I> { + type Item = Event<'a>; + + fn next(&mut self) -> Option<Self::Item> { + let event = self.inner.next(); + let compile_fail; + let should_panic; + let ignore; + let edition; + let Some(Event::Start(Tag::CodeBlock(kind))) = event else { + return event; + }; + + let mut origtext = String::new(); + for event in &mut self.inner { + match event { + Event::End(Tag::CodeBlock(..)) => break, + Event::Text(ref s) => { + origtext.push_str(s); + } + _ => {} + } + } + let lines = origtext.lines().filter_map(|l| map_line(l).for_html()); + let text = lines.intersperse("\n".into()).collect::<String>(); + + let parse_result = match kind { + CodeBlockKind::Fenced(ref lang) => { + let parse_result = + LangString::parse_without_check(lang, self.check_error_codes, false); + if !parse_result.rust { + return Some(Event::Html( + format!( + "<div class=\"example-wrap\">\ + <pre class=\"language-{}\"><code>{}</code></pre>\ + </div>", + lang, + Escape(&text), + ) + .into(), + )); + } + parse_result + } + CodeBlockKind::Indented => Default::default(), + }; + + compile_fail = parse_result.compile_fail; + should_panic = parse_result.should_panic; + ignore = parse_result.ignore; + edition = parse_result.edition; + + let explicit_edition = edition.is_some(); + let edition = edition.unwrap_or(self.edition); + + let playground_button = self.playground.as_ref().and_then(|playground| { + let krate = &playground.crate_name; + let url = &playground.url; + if url.is_empty() { + return None; + } + let test = origtext + .lines() + .map(|l| map_line(l).for_code()) + .intersperse("\n".into()) + .collect::<String>(); + let krate = krate.as_ref().map(|s| &**s); + let (test, _, _) = + doctest::make_test(&test, krate, false, &Default::default(), edition, None); + let channel = if test.contains("#![feature(") { "&version=nightly" } else { "" }; + + // These characters don't need to be escaped in a URI. + // FIXME: use a library function for percent encoding. + fn dont_escape(c: u8) -> bool { + (b'a' <= c && c <= b'z') + || (b'A' <= c && c <= b'Z') + || (b'0' <= c && c <= b'9') + || c == b'-' + || c == b'_' + || c == b'.' + || c == b'~' + || c == b'!' + || c == b'\'' + || c == b'(' + || c == b')' + || c == b'*' + } + let mut test_escaped = String::new(); + for b in test.bytes() { + if dont_escape(b) { + test_escaped.push(char::from(b)); + } else { + write!(test_escaped, "%{:02X}", b).unwrap(); + } + } + Some(format!( + r#"<a class="test-arrow" target="_blank" href="{}?code={}{}&edition={}">Run</a>"#, + url, test_escaped, channel, edition, + )) + }); + + let tooltip = if ignore != Ignore::None { + Some((None, "ignore")) + } else if compile_fail { + Some((None, "compile_fail")) + } else if should_panic { + Some((None, "should_panic")) + } else if explicit_edition { + Some((Some(edition), "edition")) + } else { + None + }; + + // insert newline to clearly separate it from the + // previous block so we can shorten the html output + let mut s = Buffer::new(); + s.push_str("\n"); + highlight::render_with_highlighting( + &text, + &mut s, + Some(&format!( + "rust-example-rendered{}", + if let Some((_, class)) = tooltip { format!(" {}", class) } else { String::new() } + )), + playground_button.as_deref(), + tooltip, + edition, + None, + None, + None, + ); + Some(Event::Html(s.into_inner().into())) + } +} + +/// Make headings links with anchor IDs and build up TOC. +struct LinkReplacer<'a, I: Iterator<Item = Event<'a>>> { + inner: I, + links: &'a [RenderedLink], + shortcut_link: Option<&'a RenderedLink>, +} + +impl<'a, I: Iterator<Item = Event<'a>>> LinkReplacer<'a, I> { + fn new(iter: I, links: &'a [RenderedLink]) -> Self { + LinkReplacer { inner: iter, links, shortcut_link: None } + } +} + +impl<'a, I: Iterator<Item = Event<'a>>> Iterator for LinkReplacer<'a, I> { + type Item = Event<'a>; + + fn next(&mut self) -> Option<Self::Item> { + let mut event = self.inner.next(); + + // Replace intra-doc links and remove disambiguators from shortcut links (`[fn@f]`). + match &mut event { + // This is a shortcut link that was resolved by the broken_link_callback: `[fn@f]` + // Remove any disambiguator. + Some(Event::Start(Tag::Link( + // [fn@f] or [fn@f][] + LinkType::ShortcutUnknown | LinkType::CollapsedUnknown, + dest, + title, + ))) => { + debug!("saw start of shortcut link to {} with title {}", dest, title); + // If this is a shortcut link, it was resolved by the broken_link_callback. + // So the URL will already be updated properly. + let link = self.links.iter().find(|&link| *link.href == **dest); + // Since this is an external iterator, we can't replace the inner text just yet. + // Store that we saw a link so we know to replace it later. + if let Some(link) = link { + trace!("it matched"); + assert!(self.shortcut_link.is_none(), "shortcut links cannot be nested"); + self.shortcut_link = Some(link); + } + } + // Now that we're done with the shortcut link, don't replace any more text. + Some(Event::End(Tag::Link( + LinkType::ShortcutUnknown | LinkType::CollapsedUnknown, + dest, + _, + ))) => { + debug!("saw end of shortcut link to {}", dest); + if self.links.iter().any(|link| *link.href == **dest) { + assert!(self.shortcut_link.is_some(), "saw closing link without opening tag"); + self.shortcut_link = None; + } + } + // Handle backticks in inline code blocks, but only if we're in the middle of a shortcut link. + // [`fn@f`] + Some(Event::Code(text)) => { + trace!("saw code {}", text); + if let Some(link) = self.shortcut_link { + trace!("original text was {}", link.original_text); + // NOTE: this only replaces if the code block is the *entire* text. + // If only part of the link has code highlighting, the disambiguator will not be removed. + // e.g. [fn@`f`] + // This is a limitation from `collect_intra_doc_links`: it passes a full link, + // and does not distinguish at all between code blocks. + // So we could never be sure we weren't replacing too much: + // [fn@my_`f`unc] is treated the same as [my_func()] in that pass. + // + // NOTE: &[1..len() - 1] is to strip the backticks + if **text == link.original_text[1..link.original_text.len() - 1] { + debug!("replacing {} with {}", text, link.new_text); + *text = CowStr::Borrowed(&link.new_text); + } + } + } + // Replace plain text in links, but only in the middle of a shortcut link. + // [fn@f] + Some(Event::Text(text)) => { + trace!("saw text {}", text); + if let Some(link) = self.shortcut_link { + trace!("original text was {}", link.original_text); + // NOTE: same limitations as `Event::Code` + if **text == *link.original_text { + debug!("replacing {} with {}", text, link.new_text); + *text = CowStr::Borrowed(&link.new_text); + } + } + } + // If this is a link, but not a shortcut link, + // replace the URL, since the broken_link_callback was not called. + Some(Event::Start(Tag::Link(_, dest, _))) => { + if let Some(link) = self.links.iter().find(|&link| *link.original_text == **dest) { + *dest = CowStr::Borrowed(link.href.as_ref()); + } + } + // Anything else couldn't have been a valid Rust path, so no need to replace the text. + _ => {} + } + + // Yield the modified event + event + } +} + +/// Wrap HTML tables into `<div>` to prevent having the doc blocks width being too big. +struct TableWrapper<'a, I: Iterator<Item = Event<'a>>> { + inner: I, + stored_events: VecDeque<Event<'a>>, +} + +impl<'a, I: Iterator<Item = Event<'a>>> TableWrapper<'a, I> { + fn new(iter: I) -> Self { + Self { inner: iter, stored_events: VecDeque::new() } + } +} + +impl<'a, I: Iterator<Item = Event<'a>>> Iterator for TableWrapper<'a, I> { + type Item = Event<'a>; + + fn next(&mut self) -> Option<Self::Item> { + if let Some(first) = self.stored_events.pop_front() { + return Some(first); + } + + let event = self.inner.next()?; + + Some(match event { + Event::Start(Tag::Table(t)) => { + self.stored_events.push_back(Event::Start(Tag::Table(t))); + Event::Html(CowStr::Borrowed("<div>")) + } + Event::End(Tag::Table(t)) => { + self.stored_events.push_back(Event::Html(CowStr::Borrowed("</div>"))); + Event::End(Tag::Table(t)) + } + e => e, + }) + } +} + +type SpannedEvent<'a> = (Event<'a>, Range<usize>); + +/// Make headings links with anchor IDs and build up TOC. +struct HeadingLinks<'a, 'b, 'ids, I> { + inner: I, + toc: Option<&'b mut TocBuilder>, + buf: VecDeque<SpannedEvent<'a>>, + id_map: &'ids mut IdMap, + heading_offset: HeadingOffset, +} + +impl<'a, 'b, 'ids, I> HeadingLinks<'a, 'b, 'ids, I> { + fn new( + iter: I, + toc: Option<&'b mut TocBuilder>, + ids: &'ids mut IdMap, + heading_offset: HeadingOffset, + ) -> Self { + HeadingLinks { inner: iter, toc, buf: VecDeque::new(), id_map: ids, heading_offset } + } +} + +impl<'a, 'b, 'ids, I: Iterator<Item = SpannedEvent<'a>>> Iterator + for HeadingLinks<'a, 'b, 'ids, I> +{ + type Item = SpannedEvent<'a>; + + fn next(&mut self) -> Option<Self::Item> { + if let Some(e) = self.buf.pop_front() { + return Some(e); + } + + let event = self.inner.next(); + if let Some((Event::Start(Tag::Heading(level, _, _)), _)) = event { + let mut id = String::new(); + for event in &mut self.inner { + match &event.0 { + Event::End(Tag::Heading(..)) => break, + Event::Start(Tag::Link(_, _, _)) | Event::End(Tag::Link(..)) => {} + Event::Text(text) | Event::Code(text) => { + id.extend(text.chars().filter_map(slugify)); + self.buf.push_back(event); + } + _ => self.buf.push_back(event), + } + } + let id = self.id_map.derive(id); + + if let Some(ref mut builder) = self.toc { + let mut html_header = String::new(); + html::push_html(&mut html_header, self.buf.iter().map(|(ev, _)| ev.clone())); + let sec = builder.push(level as u32, html_header, id.clone()); + self.buf.push_front((Event::Html(format!("{} ", sec).into()), 0..0)); + } + + let level = + std::cmp::min(level as u32 + (self.heading_offset as u32), MAX_HEADER_LEVEL); + self.buf.push_back((Event::Html(format!("</a></h{}>", level).into()), 0..0)); + + let start_tags = format!( + "<h{level} id=\"{id}\">\ + <a href=\"#{id}\">", + id = id, + level = level + ); + return Some((Event::Html(start_tags.into()), 0..0)); + } + event + } +} + +/// Extracts just the first paragraph. +struct SummaryLine<'a, I: Iterator<Item = Event<'a>>> { + inner: I, + started: bool, + depth: u32, +} + +impl<'a, I: Iterator<Item = Event<'a>>> SummaryLine<'a, I> { + fn new(iter: I) -> Self { + SummaryLine { inner: iter, started: false, depth: 0 } + } +} + +fn check_if_allowed_tag(t: &Tag<'_>) -> bool { + matches!( + t, + Tag::Paragraph | Tag::Item | Tag::Emphasis | Tag::Strong | Tag::Link(..) | Tag::BlockQuote + ) +} + +fn is_forbidden_tag(t: &Tag<'_>) -> bool { + matches!(t, Tag::CodeBlock(_) | Tag::Table(_) | Tag::TableHead | Tag::TableRow | Tag::TableCell) +} + +impl<'a, I: Iterator<Item = Event<'a>>> Iterator for SummaryLine<'a, I> { + type Item = Event<'a>; + + fn next(&mut self) -> Option<Self::Item> { + if self.started && self.depth == 0 { + return None; + } + if !self.started { + self.started = true; + } + if let Some(event) = self.inner.next() { + let mut is_start = true; + let is_allowed_tag = match event { + Event::Start(ref c) => { + if is_forbidden_tag(c) { + return None; + } + self.depth += 1; + check_if_allowed_tag(c) + } + Event::End(ref c) => { + if is_forbidden_tag(c) { + return None; + } + self.depth -= 1; + is_start = false; + check_if_allowed_tag(c) + } + _ => true, + }; + return if !is_allowed_tag { + if is_start { + Some(Event::Start(Tag::Paragraph)) + } else { + Some(Event::End(Tag::Paragraph)) + } + } else { + Some(event) + }; + } + None + } +} + +/// Moves all footnote definitions to the end and add back links to the +/// references. +struct Footnotes<'a, I> { + inner: I, + footnotes: FxHashMap<String, (Vec<Event<'a>>, u16)>, +} + +impl<'a, I> Footnotes<'a, I> { + fn new(iter: I) -> Self { + Footnotes { inner: iter, footnotes: FxHashMap::default() } + } + + fn get_entry(&mut self, key: &str) -> &mut (Vec<Event<'a>>, u16) { + let new_id = self.footnotes.len() + 1; + let key = key.to_owned(); + self.footnotes.entry(key).or_insert((Vec::new(), new_id as u16)) + } +} + +impl<'a, I: Iterator<Item = SpannedEvent<'a>>> Iterator for Footnotes<'a, I> { + type Item = SpannedEvent<'a>; + + fn next(&mut self) -> Option<Self::Item> { + loop { + match self.inner.next() { + Some((Event::FootnoteReference(ref reference), range)) => { + let entry = self.get_entry(reference); + let reference = format!( + "<sup id=\"fnref{0}\"><a href=\"#fn{0}\">{0}</a></sup>", + (*entry).1 + ); + return Some((Event::Html(reference.into()), range)); + } + Some((Event::Start(Tag::FootnoteDefinition(def)), _)) => { + let mut content = Vec::new(); + for (event, _) in &mut self.inner { + if let Event::End(Tag::FootnoteDefinition(..)) = event { + break; + } + content.push(event); + } + let entry = self.get_entry(&def); + (*entry).0 = content; + } + Some(e) => return Some(e), + None => { + if !self.footnotes.is_empty() { + let mut v: Vec<_> = self.footnotes.drain().map(|(_, x)| x).collect(); + v.sort_by(|a, b| a.1.cmp(&b.1)); + let mut ret = String::from("<div class=\"footnotes\"><hr><ol>"); + for (mut content, id) in v { + write!(ret, "<li id=\"fn{}\">", id).unwrap(); + let mut is_paragraph = false; + if let Some(&Event::End(Tag::Paragraph)) = content.last() { + content.pop(); + is_paragraph = true; + } + html::push_html(&mut ret, content.into_iter()); + write!(ret, " <a href=\"#fnref{}\">↩</a>", id).unwrap(); + if is_paragraph { + ret.push_str("</p>"); + } + ret.push_str("</li>"); + } + ret.push_str("</ol></div>"); + return Some((Event::Html(ret.into()), 0..0)); + } else { + return None; + } + } + } + } + } +} + +pub(crate) fn find_testable_code<T: doctest::Tester>( + doc: &str, + tests: &mut T, + error_codes: ErrorCodes, + enable_per_target_ignores: bool, + extra_info: Option<&ExtraInfo<'_>>, +) { + let mut parser = Parser::new(doc).into_offset_iter(); + let mut prev_offset = 0; + let mut nb_lines = 0; + let mut register_header = None; + while let Some((event, offset)) = parser.next() { + match event { + Event::Start(Tag::CodeBlock(kind)) => { + let block_info = match kind { + CodeBlockKind::Fenced(ref lang) => { + if lang.is_empty() { + Default::default() + } else { + LangString::parse( + lang, + error_codes, + enable_per_target_ignores, + extra_info, + ) + } + } + CodeBlockKind::Indented => Default::default(), + }; + if !block_info.rust { + continue; + } + + let mut test_s = String::new(); + + while let Some((Event::Text(s), _)) = parser.next() { + test_s.push_str(&s); + } + let text = test_s + .lines() + .map(|l| map_line(l).for_code()) + .collect::<Vec<Cow<'_, str>>>() + .join("\n"); + + nb_lines += doc[prev_offset..offset.start].lines().count(); + // If there are characters between the preceding line ending and + // this code block, `str::lines` will return an additional line, + // which we subtract here. + if nb_lines != 0 && !&doc[prev_offset..offset.start].ends_with('\n') { + nb_lines -= 1; + } + let line = tests.get_line() + nb_lines + 1; + tests.add_test(text, block_info, line); + prev_offset = offset.start; + } + Event::Start(Tag::Heading(level, _, _)) => { + register_header = Some(level as u32); + } + Event::Text(ref s) if register_header.is_some() => { + let level = register_header.unwrap(); + if s.is_empty() { + tests.register_header("", level); + } else { + tests.register_header(s, level); + } + register_header = None; + } + _ => {} + } + } +} + +pub(crate) struct ExtraInfo<'tcx> { + id: ExtraInfoId, + sp: Span, + tcx: TyCtxt<'tcx>, +} + +enum ExtraInfoId { + Hir(HirId), + Def(DefId), +} + +impl<'tcx> ExtraInfo<'tcx> { + pub(crate) fn new(tcx: TyCtxt<'tcx>, hir_id: HirId, sp: Span) -> ExtraInfo<'tcx> { + ExtraInfo { id: ExtraInfoId::Hir(hir_id), sp, tcx } + } + + pub(crate) fn new_did(tcx: TyCtxt<'tcx>, did: DefId, sp: Span) -> ExtraInfo<'tcx> { + ExtraInfo { id: ExtraInfoId::Def(did), sp, tcx } + } + + fn error_invalid_codeblock_attr(&self, msg: &str, help: &str) { + let hir_id = match self.id { + ExtraInfoId::Hir(hir_id) => hir_id, + ExtraInfoId::Def(item_did) => { + match item_did.as_local() { + Some(item_did) => self.tcx.hir().local_def_id_to_hir_id(item_did), + None => { + // If non-local, no need to check anything. + return; + } + } + } + }; + self.tcx.struct_span_lint_hir( + crate::lint::INVALID_CODEBLOCK_ATTRIBUTES, + hir_id, + self.sp, + |lint| { + let mut diag = lint.build(msg); + diag.help(help); + diag.emit(); + }, + ); + } +} + +#[derive(Eq, PartialEq, Clone, Debug)] +pub(crate) struct LangString { + original: String, + pub(crate) should_panic: bool, + pub(crate) no_run: bool, + pub(crate) ignore: Ignore, + pub(crate) rust: bool, + pub(crate) test_harness: bool, + pub(crate) compile_fail: bool, + pub(crate) error_codes: Vec<String>, + pub(crate) edition: Option<Edition>, +} + +#[derive(Eq, PartialEq, Clone, Debug)] +pub(crate) enum Ignore { + All, + None, + Some(Vec<String>), +} + +impl Default for LangString { + fn default() -> Self { + Self { + original: String::new(), + should_panic: false, + no_run: false, + ignore: Ignore::None, + rust: true, + test_harness: false, + compile_fail: false, + error_codes: Vec::new(), + edition: None, + } + } +} + +impl LangString { + fn parse_without_check( + string: &str, + allow_error_code_check: ErrorCodes, + enable_per_target_ignores: bool, + ) -> LangString { + Self::parse(string, allow_error_code_check, enable_per_target_ignores, None) + } + + fn tokens(string: &str) -> impl Iterator<Item = &str> { + // Pandoc, which Rust once used for generating documentation, + // expects lang strings to be surrounded by `{}` and for each token + // to be proceeded by a `.`. Since some of these lang strings are still + // loose in the wild, we strip a pair of surrounding `{}` from the lang + // string and a leading `.` from each token. + + let string = string.trim(); + + let first = string.chars().next(); + let last = string.chars().last(); + + let string = if first == Some('{') && last == Some('}') { + &string[1..string.len() - 1] + } else { + string + }; + + string + .split(|c| c == ',' || c == ' ' || c == '\t') + .map(str::trim) + .map(|token| token.strip_prefix('.').unwrap_or(token)) + .filter(|token| !token.is_empty()) + } + + fn parse( + string: &str, + allow_error_code_check: ErrorCodes, + enable_per_target_ignores: bool, + extra: Option<&ExtraInfo<'_>>, + ) -> LangString { + let allow_error_code_check = allow_error_code_check.as_bool(); + let mut seen_rust_tags = false; + let mut seen_other_tags = false; + let mut data = LangString::default(); + let mut ignores = vec![]; + + data.original = string.to_owned(); + + for token in Self::tokens(string) { + match token { + "should_panic" => { + data.should_panic = true; + seen_rust_tags = !seen_other_tags; + } + "no_run" => { + data.no_run = true; + seen_rust_tags = !seen_other_tags; + } + "ignore" => { + data.ignore = Ignore::All; + seen_rust_tags = !seen_other_tags; + } + x if x.starts_with("ignore-") => { + if enable_per_target_ignores { + ignores.push(x.trim_start_matches("ignore-").to_owned()); + seen_rust_tags = !seen_other_tags; + } + } + "rust" => { + data.rust = true; + seen_rust_tags = true; + } + "test_harness" => { + data.test_harness = true; + seen_rust_tags = !seen_other_tags || seen_rust_tags; + } + "compile_fail" => { + data.compile_fail = true; + seen_rust_tags = !seen_other_tags || seen_rust_tags; + data.no_run = true; + } + x if x.starts_with("edition") => { + data.edition = x[7..].parse::<Edition>().ok(); + } + x if allow_error_code_check && x.starts_with('E') && x.len() == 5 => { + if x[1..].parse::<u32>().is_ok() { + data.error_codes.push(x.to_owned()); + seen_rust_tags = !seen_other_tags || seen_rust_tags; + } else { + seen_other_tags = true; + } + } + x if extra.is_some() => { + let s = x.to_lowercase(); + if let Some((flag, help)) = if s == "compile-fail" + || s == "compile_fail" + || s == "compilefail" + { + Some(( + "compile_fail", + "the code block will either not be tested if not marked as a rust one \ + or won't fail if it compiles successfully", + )) + } else if s == "should-panic" || s == "should_panic" || s == "shouldpanic" { + Some(( + "should_panic", + "the code block will either not be tested if not marked as a rust one \ + or won't fail if it doesn't panic when running", + )) + } else if s == "no-run" || s == "no_run" || s == "norun" { + Some(( + "no_run", + "the code block will either not be tested if not marked as a rust one \ + or will be run (which you might not want)", + )) + } else if s == "test-harness" || s == "test_harness" || s == "testharness" { + Some(( + "test_harness", + "the code block will either not be tested if not marked as a rust one \ + or the code will be wrapped inside a main function", + )) + } else { + None + } { + if let Some(extra) = extra { + extra.error_invalid_codeblock_attr( + &format!("unknown attribute `{}`. Did you mean `{}`?", x, flag), + help, + ); + } + } + seen_other_tags = true; + } + _ => seen_other_tags = true, + } + } + + // ignore-foo overrides ignore + if !ignores.is_empty() { + data.ignore = Ignore::Some(ignores); + } + + data.rust &= !seen_other_tags || seen_rust_tags; + + data + } +} + +impl Markdown<'_> { + pub fn into_string(self) -> String { + let Markdown { + content: md, + links, + ids, + error_codes: codes, + edition, + playground, + heading_offset, + } = self; + + // This is actually common enough to special-case + if md.is_empty() { + return String::new(); + } + let mut replacer = |broken_link: BrokenLink<'_>| { + links + .iter() + .find(|link| link.original_text.as_str() == &*broken_link.reference) + .map(|link| (link.href.as_str().into(), link.new_text.as_str().into())) + }; + + let p = Parser::new_with_broken_link_callback(md, main_body_opts(), Some(&mut replacer)); + let p = p.into_offset_iter(); + + let mut s = String::with_capacity(md.len() * 3 / 2); + + let p = HeadingLinks::new(p, None, ids, heading_offset); + let p = Footnotes::new(p); + let p = LinkReplacer::new(p.map(|(ev, _)| ev), links); + let p = TableWrapper::new(p); + let p = CodeBlocks::new(p, codes, edition, playground); + html::push_html(&mut s, p); + + s + } +} + +impl MarkdownWithToc<'_> { + pub(crate) fn into_string(self) -> String { + let MarkdownWithToc(md, ids, codes, edition, playground) = self; + + let p = Parser::new_ext(md, main_body_opts()).into_offset_iter(); + + let mut s = String::with_capacity(md.len() * 3 / 2); + + let mut toc = TocBuilder::new(); + + { + let p = HeadingLinks::new(p, Some(&mut toc), ids, HeadingOffset::H1); + let p = Footnotes::new(p); + let p = TableWrapper::new(p.map(|(ev, _)| ev)); + let p = CodeBlocks::new(p, codes, edition, playground); + html::push_html(&mut s, p); + } + + format!("<nav id=\"TOC\">{}</nav>{}", toc.into_toc().print(), s) + } +} + +impl MarkdownHtml<'_> { + pub(crate) fn into_string(self) -> String { + let MarkdownHtml(md, ids, codes, edition, playground) = self; + + // This is actually common enough to special-case + if md.is_empty() { + return String::new(); + } + let p = Parser::new_ext(md, main_body_opts()).into_offset_iter(); + + // Treat inline HTML as plain text. + let p = p.map(|event| match event.0 { + Event::Html(text) => (Event::Text(text), event.1), + _ => event, + }); + + let mut s = String::with_capacity(md.len() * 3 / 2); + + let p = HeadingLinks::new(p, None, ids, HeadingOffset::H1); + let p = Footnotes::new(p); + let p = TableWrapper::new(p.map(|(ev, _)| ev)); + let p = CodeBlocks::new(p, codes, edition, playground); + html::push_html(&mut s, p); + + s + } +} + +impl MarkdownSummaryLine<'_> { + pub(crate) fn into_string(self) -> String { + let MarkdownSummaryLine(md, links) = self; + // This is actually common enough to special-case + if md.is_empty() { + return String::new(); + } + + let mut replacer = |broken_link: BrokenLink<'_>| { + links + .iter() + .find(|link| link.original_text.as_str() == &*broken_link.reference) + .map(|link| (link.href.as_str().into(), link.new_text.as_str().into())) + }; + + let p = Parser::new_with_broken_link_callback(md, summary_opts(), Some(&mut replacer)); + + let mut s = String::new(); + + html::push_html(&mut s, LinkReplacer::new(SummaryLine::new(p), links)); + + s + } +} + +/// Renders a subset of Markdown in the first paragraph of the provided Markdown. +/// +/// - *Italics*, **bold**, and `inline code` styles **are** rendered. +/// - Headings and links are stripped (though the text *is* rendered). +/// - HTML, code blocks, and everything else are ignored. +/// +/// Returns a tuple of the rendered HTML string and whether the output was shortened +/// due to the provided `length_limit`. +fn markdown_summary_with_limit( + md: &str, + link_names: &[RenderedLink], + length_limit: usize, +) -> (String, bool) { + if md.is_empty() { + return (String::new(), false); + } + + let mut replacer = |broken_link: BrokenLink<'_>| { + link_names + .iter() + .find(|link| link.original_text.as_str() == &*broken_link.reference) + .map(|link| (link.href.as_str().into(), link.new_text.as_str().into())) + }; + + let p = Parser::new_with_broken_link_callback(md, summary_opts(), Some(&mut replacer)); + let mut p = LinkReplacer::new(p, link_names); + + let mut buf = HtmlWithLimit::new(length_limit); + let mut stopped_early = false; + p.try_for_each(|event| { + match &event { + Event::Text(text) => { + let r = + text.split_inclusive(char::is_whitespace).try_for_each(|word| buf.push(word)); + if r.is_break() { + stopped_early = true; + } + return r; + } + Event::Code(code) => { + buf.open_tag("code"); + let r = buf.push(code); + if r.is_break() { + stopped_early = true; + } else { + buf.close_tag(); + } + return r; + } + Event::Start(tag) => match tag { + Tag::Emphasis => buf.open_tag("em"), + Tag::Strong => buf.open_tag("strong"), + Tag::CodeBlock(..) => return ControlFlow::BREAK, + _ => {} + }, + Event::End(tag) => match tag { + Tag::Emphasis | Tag::Strong => buf.close_tag(), + Tag::Paragraph | Tag::Heading(..) => return ControlFlow::BREAK, + _ => {} + }, + Event::HardBreak | Event::SoftBreak => buf.push(" ")?, + _ => {} + }; + ControlFlow::CONTINUE + }); + + (buf.finish(), stopped_early) +} + +/// Renders a shortened first paragraph of the given Markdown as a subset of Markdown, +/// making it suitable for contexts like the search index. +/// +/// Will shorten to 59 or 60 characters, including an ellipsis (…) if it was shortened. +/// +/// See [`markdown_summary_with_limit`] for details about what is rendered and what is not. +pub(crate) fn short_markdown_summary(markdown: &str, link_names: &[RenderedLink]) -> String { + let (mut s, was_shortened) = markdown_summary_with_limit(markdown, link_names, 59); + + if was_shortened { + s.push('…'); + } + + s +} + +/// Renders the first paragraph of the provided markdown as plain text. +/// Useful for alt-text. +/// +/// - Headings, links, and formatting are stripped. +/// - Inline code is rendered as-is, surrounded by backticks. +/// - HTML and code blocks are ignored. +pub(crate) fn plain_text_summary(md: &str) -> String { + if md.is_empty() { + return String::new(); + } + + let mut s = String::with_capacity(md.len() * 3 / 2); + + for event in Parser::new_ext(md, summary_opts()) { + match &event { + Event::Text(text) => s.push_str(text), + Event::Code(code) => { + s.push('`'); + s.push_str(code); + s.push('`'); + } + Event::HardBreak | Event::SoftBreak => s.push(' '), + Event::Start(Tag::CodeBlock(..)) => break, + Event::End(Tag::Paragraph) => break, + Event::End(Tag::Heading(..)) => break, + _ => (), + } + } + + s +} + +#[derive(Debug)] +pub(crate) struct MarkdownLink { + pub kind: LinkType, + pub link: String, + pub range: Range<usize>, +} + +pub(crate) fn markdown_links<R>( + md: &str, + filter_map: impl Fn(MarkdownLink) -> Option<R>, +) -> Vec<R> { + if md.is_empty() { + return vec![]; + } + + let links = RefCell::new(vec![]); + + // FIXME: remove this function once pulldown_cmark can provide spans for link definitions. + let locate = |s: &str, fallback: Range<usize>| unsafe { + let s_start = s.as_ptr(); + let s_end = s_start.add(s.len()); + let md_start = md.as_ptr(); + let md_end = md_start.add(md.len()); + if md_start <= s_start && s_end <= md_end { + let start = s_start.offset_from(md_start) as usize; + let end = s_end.offset_from(md_start) as usize; + start..end + } else { + fallback + } + }; + + let span_for_link = |link: &CowStr<'_>, span: Range<usize>| { + // For diagnostics, we want to underline the link's definition but `span` will point at + // where the link is used. This is a problem for reference-style links, where the definition + // is separate from the usage. + match link { + // `Borrowed` variant means the string (the link's destination) may come directly from + // the markdown text and we can locate the original link destination. + // NOTE: LinkReplacer also provides `Borrowed` but possibly from other sources, + // so `locate()` can fall back to use `span`. + CowStr::Borrowed(s) => locate(s, span), + + // For anything else, we can only use the provided range. + CowStr::Boxed(_) | CowStr::Inlined(_) => span, + } + }; + + let mut push = |link: BrokenLink<'_>| { + let span = span_for_link(&link.reference, link.span); + filter_map(MarkdownLink { + kind: LinkType::ShortcutUnknown, + link: link.reference.to_string(), + range: span, + }) + .map(|link| links.borrow_mut().push(link)); + None + }; + let p = Parser::new_with_broken_link_callback(md, main_body_opts(), Some(&mut push)) + .into_offset_iter(); + + // There's no need to thread an IdMap through to here because + // the IDs generated aren't going to be emitted anywhere. + let mut ids = IdMap::new(); + let iter = Footnotes::new(HeadingLinks::new(p, None, &mut ids, HeadingOffset::H1)); + + for ev in iter { + if let Event::Start(Tag::Link( + // `<>` links cannot be intra-doc links so we skip them. + kind @ (LinkType::Inline + | LinkType::Reference + | LinkType::ReferenceUnknown + | LinkType::Collapsed + | LinkType::CollapsedUnknown + | LinkType::Shortcut + | LinkType::ShortcutUnknown), + dest, + _, + )) = ev.0 + { + debug!("found link: {dest}"); + let span = span_for_link(&dest, ev.1); + filter_map(MarkdownLink { kind, link: dest.into_string(), range: span }) + .map(|link| links.borrow_mut().push(link)); + } + } + + links.into_inner() +} + +#[derive(Debug)] +pub(crate) struct RustCodeBlock { + /// The range in the markdown that the code block occupies. Note that this includes the fences + /// for fenced code blocks. + pub(crate) range: Range<usize>, + /// The range in the markdown that the code within the code block occupies. + pub(crate) code: Range<usize>, + pub(crate) is_fenced: bool, + pub(crate) lang_string: LangString, +} + +/// Returns a range of bytes for each code block in the markdown that is tagged as `rust` or +/// untagged (and assumed to be rust). +pub(crate) fn rust_code_blocks(md: &str, extra_info: &ExtraInfo<'_>) -> Vec<RustCodeBlock> { + let mut code_blocks = vec![]; + + if md.is_empty() { + return code_blocks; + } + + let mut p = Parser::new_ext(md, main_body_opts()).into_offset_iter(); + + while let Some((event, offset)) = p.next() { + if let Event::Start(Tag::CodeBlock(syntax)) = event { + let (lang_string, code_start, code_end, range, is_fenced) = match syntax { + CodeBlockKind::Fenced(syntax) => { + let syntax = syntax.as_ref(); + let lang_string = if syntax.is_empty() { + Default::default() + } else { + LangString::parse(&*syntax, ErrorCodes::Yes, false, Some(extra_info)) + }; + if !lang_string.rust { + continue; + } + let (code_start, mut code_end) = match p.next() { + Some((Event::Text(_), offset)) => (offset.start, offset.end), + Some((_, sub_offset)) => { + let code = Range { start: sub_offset.start, end: sub_offset.start }; + code_blocks.push(RustCodeBlock { + is_fenced: true, + range: offset, + code, + lang_string, + }); + continue; + } + None => { + let code = Range { start: offset.end, end: offset.end }; + code_blocks.push(RustCodeBlock { + is_fenced: true, + range: offset, + code, + lang_string, + }); + continue; + } + }; + while let Some((Event::Text(_), offset)) = p.next() { + code_end = offset.end; + } + (lang_string, code_start, code_end, offset, true) + } + CodeBlockKind::Indented => { + // The ending of the offset goes too far sometime so we reduce it by one in + // these cases. + if offset.end > offset.start && md.get(offset.end..=offset.end) == Some("\n") { + ( + LangString::default(), + offset.start, + offset.end, + Range { start: offset.start, end: offset.end - 1 }, + false, + ) + } else { + (LangString::default(), offset.start, offset.end, offset, false) + } + } + }; + + code_blocks.push(RustCodeBlock { + is_fenced, + range, + code: Range { start: code_start, end: code_end }, + lang_string, + }); + } + } + + code_blocks +} + +#[derive(Clone, Default, Debug)] +pub struct IdMap { + map: FxHashMap<Cow<'static, str>, usize>, +} + +// The map is pre-initialized and cloned each time to avoid reinitializing it repeatedly. +static DEFAULT_ID_MAP: Lazy<FxHashMap<Cow<'static, str>, usize>> = Lazy::new(|| init_id_map()); + +fn init_id_map() -> FxHashMap<Cow<'static, str>, usize> { + let mut map = FxHashMap::default(); + // This is the list of IDs used in Javascript. + map.insert("settings".into(), 1); + map.insert("not-displayed".into(), 1); + map.insert("alternative-display".into(), 1); + map.insert("search".into(), 1); + // This is the list of IDs used in HTML generated in Rust (including the ones + // used in tera template files). + map.insert("mainThemeStyle".into(), 1); + map.insert("themeStyle".into(), 1); + map.insert("settings-menu".into(), 1); + map.insert("help-button".into(), 1); + map.insert("main-content".into(), 1); + map.insert("crate-search".into(), 1); + map.insert("toggle-all-docs".into(), 1); + map.insert("all-types".into(), 1); + map.insert("default-settings".into(), 1); + map.insert("rustdoc-vars".into(), 1); + map.insert("sidebar-vars".into(), 1); + map.insert("copy-path".into(), 1); + map.insert("TOC".into(), 1); + // This is the list of IDs used by rustdoc sections (but still generated by + // rustdoc). + map.insert("fields".into(), 1); + map.insert("variants".into(), 1); + map.insert("implementors-list".into(), 1); + map.insert("synthetic-implementors-list".into(), 1); + map.insert("foreign-impls".into(), 1); + map.insert("implementations".into(), 1); + map.insert("trait-implementations".into(), 1); + map.insert("synthetic-implementations".into(), 1); + map.insert("blanket-implementations".into(), 1); + map.insert("required-associated-types".into(), 1); + map.insert("provided-associated-types".into(), 1); + map.insert("provided-associated-consts".into(), 1); + map.insert("required-associated-consts".into(), 1); + map.insert("required-methods".into(), 1); + map.insert("provided-methods".into(), 1); + map.insert("implementors".into(), 1); + map.insert("synthetic-implementors".into(), 1); + map.insert("implementations-list".into(), 1); + map.insert("trait-implementations-list".into(), 1); + map.insert("synthetic-implementations-list".into(), 1); + map.insert("blanket-implementations-list".into(), 1); + map.insert("deref-methods".into(), 1); + map.insert("layout".into(), 1); + map +} + +impl IdMap { + pub fn new() -> Self { + IdMap { map: DEFAULT_ID_MAP.clone() } + } + + pub(crate) fn derive<S: AsRef<str> + ToString>(&mut self, candidate: S) -> String { + let id = match self.map.get_mut(candidate.as_ref()) { + None => candidate.to_string(), + Some(a) => { + let id = format!("{}-{}", candidate.as_ref(), *a); + *a += 1; + id + } + }; + + self.map.insert(id.clone().into(), 1); + id + } +} diff --git a/src/librustdoc/html/markdown/tests.rs b/src/librustdoc/html/markdown/tests.rs new file mode 100644 index 000000000..5c0bf0ed9 --- /dev/null +++ b/src/librustdoc/html/markdown/tests.rs @@ -0,0 +1,312 @@ +use super::{find_testable_code, plain_text_summary, short_markdown_summary}; +use super::{ErrorCodes, HeadingOffset, IdMap, Ignore, LangString, Markdown, MarkdownHtml}; +use rustc_span::edition::{Edition, DEFAULT_EDITION}; + +#[test] +fn test_unique_id() { + let input = [ + "foo", + "examples", + "examples", + "method.into_iter", + "examples", + "method.into_iter", + "foo", + "main-content", + "search", + "methods", + "examples", + "method.into_iter", + "assoc_type.Item", + "assoc_type.Item", + ]; + let expected = [ + "foo", + "examples", + "examples-1", + "method.into_iter", + "examples-2", + "method.into_iter-1", + "foo-1", + "main-content-1", + "search-1", + "methods", + "examples-3", + "method.into_iter-2", + "assoc_type.Item", + "assoc_type.Item-1", + ]; + + let mut map = IdMap::new(); + let actual: Vec<String> = input.iter().map(|s| map.derive(s.to_string())).collect(); + assert_eq!(&actual[..], expected); +} + +#[test] +fn test_lang_string_parse() { + fn t(lg: LangString) { + let s = &lg.original; + assert_eq!(LangString::parse(s, ErrorCodes::Yes, true, None), lg) + } + + t(Default::default()); + t(LangString { original: "rust".into(), ..Default::default() }); + t(LangString { original: ".rust".into(), ..Default::default() }); + t(LangString { original: "{rust}".into(), ..Default::default() }); + t(LangString { original: "{.rust}".into(), ..Default::default() }); + t(LangString { original: "sh".into(), rust: false, ..Default::default() }); + t(LangString { original: "ignore".into(), ignore: Ignore::All, ..Default::default() }); + t(LangString { + original: "ignore-foo".into(), + ignore: Ignore::Some(vec!["foo".to_string()]), + ..Default::default() + }); + t(LangString { original: "should_panic".into(), should_panic: true, ..Default::default() }); + t(LangString { original: "no_run".into(), no_run: true, ..Default::default() }); + t(LangString { original: "test_harness".into(), test_harness: true, ..Default::default() }); + t(LangString { + original: "compile_fail".into(), + no_run: true, + compile_fail: true, + ..Default::default() + }); + t(LangString { original: "no_run,example".into(), no_run: true, ..Default::default() }); + t(LangString { + original: "sh,should_panic".into(), + should_panic: true, + rust: false, + ..Default::default() + }); + t(LangString { original: "example,rust".into(), ..Default::default() }); + t(LangString { + original: "test_harness,.rust".into(), + test_harness: true, + ..Default::default() + }); + t(LangString { + original: "text, no_run".into(), + no_run: true, + rust: false, + ..Default::default() + }); + t(LangString { + original: "text,no_run".into(), + no_run: true, + rust: false, + ..Default::default() + }); + t(LangString { + original: "text,no_run, ".into(), + no_run: true, + rust: false, + ..Default::default() + }); + t(LangString { + original: "text,no_run,".into(), + no_run: true, + rust: false, + ..Default::default() + }); + t(LangString { + original: "edition2015".into(), + edition: Some(Edition::Edition2015), + ..Default::default() + }); + t(LangString { + original: "edition2018".into(), + edition: Some(Edition::Edition2018), + ..Default::default() + }); +} + +#[test] +fn test_lang_string_tokenizer() { + fn case(lang_string: &str, want: &[&str]) { + let have = LangString::tokens(lang_string).collect::<Vec<&str>>(); + assert_eq!(have, want, "Unexpected lang string split for `{}`", lang_string); + } + + case("", &[]); + case("foo", &["foo"]); + case("foo,bar", &["foo", "bar"]); + case(".foo,.bar", &["foo", "bar"]); + case("{.foo,.bar}", &["foo", "bar"]); + case(" {.foo,.bar} ", &["foo", "bar"]); + case("foo bar", &["foo", "bar"]); + case("foo\tbar", &["foo", "bar"]); + case("foo\t, bar", &["foo", "bar"]); + case(" foo , bar ", &["foo", "bar"]); + case(",,foo,,bar,,", &["foo", "bar"]); + case("foo=bar", &["foo=bar"]); + case("a-b-c", &["a-b-c"]); + case("a_b_c", &["a_b_c"]); +} + +#[test] +fn test_header() { + fn t(input: &str, expect: &str) { + let mut map = IdMap::new(); + let output = Markdown { + content: input, + links: &[], + ids: &mut map, + error_codes: ErrorCodes::Yes, + edition: DEFAULT_EDITION, + playground: &None, + heading_offset: HeadingOffset::H2, + } + .into_string(); + assert_eq!(output, expect, "original: {}", input); + } + + t("# Foo bar", "<h2 id=\"foo-bar\"><a href=\"#foo-bar\">Foo bar</a></h2>"); + t( + "## Foo-bar_baz qux", + "<h3 id=\"foo-bar_baz-qux\">\ + <a href=\"#foo-bar_baz-qux\">Foo-bar_baz qux</a></h3>", + ); + t( + "### **Foo** *bar* baz!?!& -_qux_-%", + "<h4 id=\"foo-bar-baz--qux-\">\ + <a href=\"#foo-bar-baz--qux-\"><strong>Foo</strong> \ + <em>bar</em> baz!?!& -<em>qux</em>-%</a>\ + </h4>", + ); + t( + "#### **Foo?** & \\*bar?!* _`baz`_ ❤ #qux", + "<h5 id=\"foo--bar--baz--qux\">\ + <a href=\"#foo--bar--baz--qux\"><strong>Foo?</strong> & *bar?!* \ + <em><code>baz</code></em> ❤ #qux</a>\ + </h5>", + ); +} + +#[test] +fn test_header_ids_multiple_blocks() { + let mut map = IdMap::new(); + fn t(map: &mut IdMap, input: &str, expect: &str) { + let output = Markdown { + content: input, + links: &[], + ids: map, + error_codes: ErrorCodes::Yes, + edition: DEFAULT_EDITION, + playground: &None, + heading_offset: HeadingOffset::H2, + } + .into_string(); + assert_eq!(output, expect, "original: {}", input); + } + + t(&mut map, "# Example", "<h2 id=\"example\"><a href=\"#example\">Example</a></h2>"); + t(&mut map, "# Panics", "<h2 id=\"panics\"><a href=\"#panics\">Panics</a></h2>"); + t(&mut map, "# Example", "<h2 id=\"example-1\"><a href=\"#example-1\">Example</a></h2>"); + t(&mut map, "# Search", "<h2 id=\"search-1\"><a href=\"#search-1\">Search</a></h2>"); + t(&mut map, "# Example", "<h2 id=\"example-2\"><a href=\"#example-2\">Example</a></h2>"); + t(&mut map, "# Panics", "<h2 id=\"panics-1\"><a href=\"#panics-1\">Panics</a></h2>"); +} + +#[test] +fn test_short_markdown_summary() { + fn t(input: &str, expect: &str) { + let output = short_markdown_summary(input, &[][..]); + assert_eq!(output, expect, "original: {}", input); + } + + t("", ""); + t("hello [Rust](https://www.rust-lang.org) :)", "hello Rust :)"); + t("*italic*", "<em>italic</em>"); + t("**bold**", "<strong>bold</strong>"); + t("Multi-line\nsummary", "Multi-line summary"); + t("Hard-break \nsummary", "Hard-break summary"); + t("hello [Rust] :)\n\n[Rust]: https://www.rust-lang.org", "hello Rust :)"); + t("hello [Rust](https://www.rust-lang.org \"Rust\") :)", "hello Rust :)"); + t("dud [link]", "dud [link]"); + t("code `let x = i32;` ...", "code <code>let x = i32;</code> …"); + t("type `Type<'static>` ...", "type <code>Type<'static></code> …"); + // Test to ensure escaping and length-limiting work well together. + // The output should be limited based on the input length, + // rather than the output, because escaped versions of characters + // are usually longer than how the character is actually displayed. + t( + "& & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & &", + "& & & & & & & & & & & & \ + & & & & & & & & & & & & \ + & & & & & …", + ); + t("# top header", "top header"); + t("# top header\n\nfollowed by a paragraph", "top header"); + t("## header", "header"); + t("first paragraph\n\nsecond paragraph", "first paragraph"); + t("```\nfn main() {}\n```", ""); + t("<div>hello</div>", ""); + t( + "a *very*, **very** long first paragraph. it has lots of `inline code: Vec<T>`. and it has a [link](https://www.rust-lang.org).\nthat was a soft line break! \nthat was a hard one\n\nsecond paragraph.", + "a <em>very</em>, <strong>very</strong> long first paragraph. it has lots of …", + ); +} + +#[test] +fn test_plain_text_summary() { + fn t(input: &str, expect: &str) { + let output = plain_text_summary(input); + assert_eq!(output, expect, "original: {}", input); + } + + t("", ""); + t("hello [Rust](https://www.rust-lang.org) :)", "hello Rust :)"); + t("**bold**", "bold"); + t("Multi-line\nsummary", "Multi-line summary"); + t("Hard-break \nsummary", "Hard-break summary"); + t("hello [Rust] :)\n\n[Rust]: https://www.rust-lang.org", "hello Rust :)"); + t("hello [Rust](https://www.rust-lang.org \"Rust\") :)", "hello Rust :)"); + t("dud [link]", "dud [link]"); + t("code `let x = i32;` ...", "code `let x = i32;` …"); + t("type `Type<'static>` ...", "type `Type<'static>` …"); + t("# top header", "top header"); + t("# top header\n\nfollowed by some text", "top header"); + t("## header", "header"); + t("first paragraph\n\nsecond paragraph", "first paragraph"); + t("```\nfn main() {}\n```", ""); + t("<div>hello</div>", ""); + t( + "a *very*, **very** long first paragraph. it has lots of `inline code: Vec<T>`. and it has a [link](https://www.rust-lang.org).\nthat was a soft line break! \nthat was a hard one\n\nsecond paragraph.", + "a very, very long first paragraph. it has lots of `inline code: Vec<T>`. and it has a link. that was a soft line break! that was a hard one", + ); +} + +#[test] +fn test_markdown_html_escape() { + fn t(input: &str, expect: &str) { + let mut idmap = IdMap::new(); + let output = + MarkdownHtml(input, &mut idmap, ErrorCodes::Yes, DEFAULT_EDITION, &None).into_string(); + assert_eq!(output, expect, "original: {}", input); + } + + t("`Struct<'a, T>`", "<p><code>Struct<'a, T></code></p>\n"); + t("Struct<'a, T>", "<p>Struct<’a, T></p>\n"); + t("Struct<br>", "<p>Struct<br></p>\n"); +} + +#[test] +fn test_find_testable_code_line() { + fn t(input: &str, expect: &[usize]) { + impl crate::doctest::Tester for Vec<usize> { + fn add_test(&mut self, _test: String, _config: LangString, line: usize) { + self.push(line); + } + } + let mut lines = Vec::<usize>::new(); + find_testable_code(input, &mut lines, ErrorCodes::No, false, None); + assert_eq!(lines, expect); + } + + t("", &[]); + t("```rust\n```", &[1]); + t(" ```rust\n```", &[1]); + t("\n```rust\n```", &[2]); + t("\n ```rust\n```", &[2]); + t("```rust\n```\n```rust\n```", &[1, 3]); + t("```rust\n```\n ```rust\n```", &[1, 3]); +} diff --git a/src/librustdoc/html/mod.rs b/src/librustdoc/html/mod.rs new file mode 100644 index 000000000..481ed16c0 --- /dev/null +++ b/src/librustdoc/html/mod.rs @@ -0,0 +1,15 @@ +pub(crate) mod escape; +pub(crate) mod format; +pub(crate) mod highlight; +pub(crate) mod layout; +mod length_limit; +// used by the error-index generator, so it needs to be public +pub mod markdown; +pub(crate) mod render; +pub(crate) mod sources; +pub(crate) mod static_files; +pub(crate) mod toc; +mod url_parts_builder; + +#[cfg(test)] +mod tests; diff --git a/src/librustdoc/html/render/context.rs b/src/librustdoc/html/render/context.rs new file mode 100644 index 000000000..2ed7a6f1b --- /dev/null +++ b/src/librustdoc/html/render/context.rs @@ -0,0 +1,762 @@ +use std::cell::RefCell; +use std::collections::BTreeMap; +use std::io; +use std::path::{Path, PathBuf}; +use std::rc::Rc; +use std::sync::mpsc::{channel, Receiver}; + +use rustc_data_structures::fx::{FxHashMap, FxHashSet}; +use rustc_hir::def_id::{DefId, LOCAL_CRATE}; +use rustc_middle::ty::TyCtxt; +use rustc_session::Session; +use rustc_span::edition::Edition; +use rustc_span::source_map::FileName; +use rustc_span::{sym, Symbol}; + +use super::print_item::{full_path, item_path, print_item}; +use super::search_index::build_index; +use super::write_shared::write_shared; +use super::{ + collect_spans_and_sources, print_sidebar, scrape_examples_help, AllTypes, LinkFromSrc, NameDoc, + StylePath, BASIC_KEYWORDS, +}; + +use crate::clean::{self, types::ExternalLocation, ExternalCrate}; +use crate::config::{ModuleSorting, RenderOptions}; +use crate::docfs::{DocFS, PathError}; +use crate::error::Error; +use crate::formats::cache::Cache; +use crate::formats::item_type::ItemType; +use crate::formats::FormatRenderer; +use crate::html::escape::Escape; +use crate::html::format::{join_with_double_colon, Buffer}; +use crate::html::markdown::{self, plain_text_summary, ErrorCodes, IdMap}; +use crate::html::{layout, sources}; +use crate::scrape_examples::AllCallLocations; +use crate::try_err; + +/// Major driving force in all rustdoc rendering. This contains information +/// about where in the tree-like hierarchy rendering is occurring and controls +/// how the current page is being rendered. +/// +/// It is intended that this context is a lightweight object which can be fairly +/// easily cloned because it is cloned per work-job (about once per item in the +/// rustdoc tree). +pub(crate) struct Context<'tcx> { + /// Current hierarchy of components leading down to what's currently being + /// rendered + pub(crate) current: Vec<Symbol>, + /// The current destination folder of where HTML artifacts should be placed. + /// This changes as the context descends into the module hierarchy. + pub(crate) dst: PathBuf, + /// A flag, which when `true`, will render pages which redirect to the + /// real location of an item. This is used to allow external links to + /// publicly reused items to redirect to the right location. + pub(super) render_redirect_pages: bool, + /// Tracks section IDs for `Deref` targets so they match in both the main + /// body and the sidebar. + pub(super) deref_id_map: FxHashMap<DefId, String>, + /// The map used to ensure all generated 'id=' attributes are unique. + pub(super) id_map: IdMap, + /// Shared mutable state. + /// + /// Issue for improving the situation: [#82381][] + /// + /// [#82381]: https://github.com/rust-lang/rust/issues/82381 + pub(crate) shared: Rc<SharedContext<'tcx>>, + /// This flag indicates whether source links should be generated or not. If + /// the source files are present in the html rendering, then this will be + /// `true`. + pub(crate) include_sources: bool, +} + +// `Context` is cloned a lot, so we don't want the size to grow unexpectedly. +#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))] +rustc_data_structures::static_assert_size!(Context<'_>, 128); + +/// Shared mutable state used in [`Context`] and elsewhere. +pub(crate) struct SharedContext<'tcx> { + pub(crate) tcx: TyCtxt<'tcx>, + /// The path to the crate root source minus the file name. + /// Used for simplifying paths to the highlighted source code files. + pub(crate) src_root: PathBuf, + /// This describes the layout of each page, and is not modified after + /// creation of the context (contains info like the favicon and added html). + pub(crate) layout: layout::Layout, + /// The local file sources we've emitted and their respective url-paths. + pub(crate) local_sources: FxHashMap<PathBuf, String>, + /// Show the memory layout of types in the docs. + pub(super) show_type_layout: bool, + /// The base-URL of the issue tracker for when an item has been tagged with + /// an issue number. + pub(super) issue_tracker_base_url: Option<String>, + /// The directories that have already been created in this doc run. Used to reduce the number + /// of spurious `create_dir_all` calls. + created_dirs: RefCell<FxHashSet<PathBuf>>, + /// This flag indicates whether listings of modules (in the side bar and documentation itself) + /// should be ordered alphabetically or in order of appearance (in the source code). + pub(super) module_sorting: ModuleSorting, + /// Additional CSS files to be added to the generated docs. + pub(crate) style_files: Vec<StylePath>, + /// Suffix to be added on resource files (if suffix is "-v2" then "light.css" becomes + /// "light-v2.css"). + pub(crate) resource_suffix: String, + /// Optional path string to be used to load static files on output pages. If not set, uses + /// combinations of `../` to reach the documentation root. + pub(crate) static_root_path: Option<String>, + /// The fs handle we are working with. + pub(crate) fs: DocFS, + pub(super) codes: ErrorCodes, + pub(super) playground: Option<markdown::Playground>, + all: RefCell<AllTypes>, + /// Storage for the errors produced while generating documentation so they + /// can be printed together at the end. + errors: Receiver<String>, + /// `None` by default, depends on the `generate-redirect-map` option flag. If this field is set + /// to `Some(...)`, it'll store redirections and then generate a JSON file at the top level of + /// the crate. + redirections: Option<RefCell<FxHashMap<String, String>>>, + + /// Correspondance map used to link types used in the source code pages to allow to click on + /// links to jump to the type's definition. + pub(crate) span_correspondance_map: FxHashMap<rustc_span::Span, LinkFromSrc>, + /// The [`Cache`] used during rendering. + pub(crate) cache: Cache, + + pub(crate) call_locations: AllCallLocations, +} + +impl SharedContext<'_> { + pub(crate) fn ensure_dir(&self, dst: &Path) -> Result<(), Error> { + let mut dirs = self.created_dirs.borrow_mut(); + if !dirs.contains(dst) { + try_err!(self.fs.create_dir_all(dst), dst); + dirs.insert(dst.to_path_buf()); + } + + Ok(()) + } + + pub(crate) fn edition(&self) -> Edition { + self.tcx.sess.edition() + } +} + +impl<'tcx> Context<'tcx> { + pub(crate) fn tcx(&self) -> TyCtxt<'tcx> { + self.shared.tcx + } + + pub(crate) fn cache(&self) -> &Cache { + &self.shared.cache + } + + pub(super) fn sess(&self) -> &'tcx Session { + self.shared.tcx.sess + } + + pub(super) fn derive_id(&mut self, id: String) -> String { + self.id_map.derive(id) + } + + /// String representation of how to get back to the root path of the 'doc/' + /// folder in terms of a relative URL. + pub(super) fn root_path(&self) -> String { + "../".repeat(self.current.len()) + } + + fn render_item(&mut self, it: &clean::Item, is_module: bool) -> String { + let mut title = String::new(); + if !is_module { + title.push_str(it.name.unwrap().as_str()); + } + if !it.is_primitive() && !it.is_keyword() { + if !is_module { + title.push_str(" in "); + } + // No need to include the namespace for primitive types and keywords + title.push_str(&join_with_double_colon(&self.current)); + }; + title.push_str(" - Rust"); + let tyname = it.type_(); + let desc = it.doc_value().as_ref().map(|doc| plain_text_summary(doc)); + let desc = if let Some(desc) = desc { + desc + } else if it.is_crate() { + format!("API documentation for the Rust `{}` crate.", self.shared.layout.krate) + } else { + format!( + "API documentation for the Rust `{}` {} in crate `{}`.", + it.name.as_ref().unwrap(), + tyname, + self.shared.layout.krate + ) + }; + let keywords = make_item_keywords(it); + let name; + let tyname_s = if it.is_crate() { + name = format!("{} crate", tyname); + name.as_str() + } else { + tyname.as_str() + }; + + if !self.render_redirect_pages { + let clone_shared = Rc::clone(&self.shared); + let page = layout::Page { + css_class: tyname_s, + root_path: &self.root_path(), + static_root_path: clone_shared.static_root_path.as_deref(), + title: &title, + description: &desc, + keywords: &keywords, + resource_suffix: &clone_shared.resource_suffix, + }; + let mut page_buffer = Buffer::html(); + print_item(self, it, &mut page_buffer, &page); + layout::render( + &clone_shared.layout, + &page, + |buf: &mut _| print_sidebar(self, it, buf), + move |buf: &mut Buffer| buf.push_buffer(page_buffer), + &clone_shared.style_files, + ) + } else { + if let Some(&(ref names, ty)) = self.cache().paths.get(&it.item_id.expect_def_id()) { + if self.current.len() + 1 != names.len() + || self.current.iter().zip(names.iter()).any(|(a, b)| a != b) + { + // We checked that the redirection isn't pointing to the current file, + // preventing an infinite redirection loop in the generated + // documentation. + + let mut path = String::new(); + for name in &names[..names.len() - 1] { + path.push_str(name.as_str()); + path.push('/'); + } + path.push_str(&item_path(ty, names.last().unwrap().as_str())); + match self.shared.redirections { + Some(ref redirections) => { + let mut current_path = String::new(); + for name in &self.current { + current_path.push_str(name.as_str()); + current_path.push('/'); + } + current_path.push_str(&item_path(ty, names.last().unwrap().as_str())); + redirections.borrow_mut().insert(current_path, path); + } + None => return layout::redirect(&format!("{}{}", self.root_path(), path)), + } + } + } + String::new() + } + } + + /// Construct a map of items shown in the sidebar to a plain-text summary of their docs. + fn build_sidebar_items(&self, m: &clean::Module) -> BTreeMap<String, Vec<NameDoc>> { + // BTreeMap instead of HashMap to get a sorted output + let mut map: BTreeMap<_, Vec<_>> = BTreeMap::new(); + let mut inserted: FxHashMap<ItemType, FxHashSet<Symbol>> = FxHashMap::default(); + + for item in &m.items { + if item.is_stripped() { + continue; + } + + let short = item.type_(); + let myname = match item.name { + None => continue, + Some(s) => s, + }; + if inserted.entry(short).or_default().insert(myname) { + let short = short.to_string(); + let myname = myname.to_string(); + map.entry(short).or_default().push(( + myname, + Some(item.doc_value().map_or_else(String::new, |s| plain_text_summary(&s))), + )); + } + } + + match self.shared.module_sorting { + ModuleSorting::Alphabetical => { + for items in map.values_mut() { + items.sort(); + } + } + ModuleSorting::DeclarationOrder => {} + } + map + } + + /// Generates a url appropriate for an `href` attribute back to the source of + /// this item. + /// + /// The url generated, when clicked, will redirect the browser back to the + /// original source code. + /// + /// If `None` is returned, then a source link couldn't be generated. This + /// may happen, for example, with externally inlined items where the source + /// of their crate documentation isn't known. + pub(super) fn src_href(&self, item: &clean::Item) -> Option<String> { + self.href_from_span(item.span(self.tcx()), true) + } + + pub(crate) fn href_from_span(&self, span: clean::Span, with_lines: bool) -> Option<String> { + if span.is_dummy() { + return None; + } + let mut root = self.root_path(); + let mut path = String::new(); + let cnum = span.cnum(self.sess()); + + // We can safely ignore synthetic `SourceFile`s. + let file = match span.filename(self.sess()) { + FileName::Real(ref path) => path.local_path_if_available().to_path_buf(), + _ => return None, + }; + let file = &file; + + let krate_sym; + let (krate, path) = if cnum == LOCAL_CRATE { + if let Some(path) = self.shared.local_sources.get(file) { + (self.shared.layout.krate.as_str(), path) + } else { + return None; + } + } else { + let (krate, src_root) = match *self.cache().extern_locations.get(&cnum)? { + ExternalLocation::Local => { + let e = ExternalCrate { crate_num: cnum }; + (e.name(self.tcx()), e.src_root(self.tcx())) + } + ExternalLocation::Remote(ref s) => { + root = s.to_string(); + let e = ExternalCrate { crate_num: cnum }; + (e.name(self.tcx()), e.src_root(self.tcx())) + } + ExternalLocation::Unknown => return None, + }; + + sources::clean_path(&src_root, file, false, |component| { + path.push_str(&component.to_string_lossy()); + path.push('/'); + }); + let mut fname = file.file_name().expect("source has no filename").to_os_string(); + fname.push(".html"); + path.push_str(&fname.to_string_lossy()); + krate_sym = krate; + (krate_sym.as_str(), &path) + }; + + let anchor = if with_lines { + let loline = span.lo(self.sess()).line; + let hiline = span.hi(self.sess()).line; + format!( + "#{}", + if loline == hiline { + loline.to_string() + } else { + format!("{}-{}", loline, hiline) + } + ) + } else { + "".to_string() + }; + Some(format!( + "{root}src/{krate}/{path}{anchor}", + root = Escape(&root), + krate = krate, + path = path, + anchor = anchor + )) + } +} + +/// Generates the documentation for `crate` into the directory `dst` +impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> { + fn descr() -> &'static str { + "html" + } + + const RUN_ON_MODULE: bool = true; + + fn init( + krate: clean::Crate, + options: RenderOptions, + cache: Cache, + tcx: TyCtxt<'tcx>, + ) -> Result<(Self, clean::Crate), Error> { + // need to save a copy of the options for rendering the index page + let md_opts = options.clone(); + let emit_crate = options.should_emit_crate(); + let RenderOptions { + output, + external_html, + id_map, + playground_url, + module_sorting, + themes: style_files, + default_settings, + extension_css, + resource_suffix, + static_root_path, + unstable_features, + generate_redirect_map, + show_type_layout, + generate_link_to_definition, + call_locations, + no_emit_shared, + .. + } = options; + + let src_root = match krate.src(tcx) { + FileName::Real(ref p) => match p.local_path_if_available().parent() { + Some(p) => p.to_path_buf(), + None => PathBuf::new(), + }, + _ => PathBuf::new(), + }; + // If user passed in `--playground-url` arg, we fill in crate name here + let mut playground = None; + if let Some(url) = playground_url { + playground = + Some(markdown::Playground { crate_name: Some(krate.name(tcx).to_string()), url }); + } + let mut layout = layout::Layout { + logo: String::new(), + favicon: String::new(), + external_html, + default_settings, + krate: krate.name(tcx).to_string(), + css_file_extension: extension_css, + scrape_examples_extension: !call_locations.is_empty(), + }; + let mut issue_tracker_base_url = None; + let mut include_sources = true; + + // Crawl the crate attributes looking for attributes which control how we're + // going to emit HTML + for attr in krate.module.attrs.lists(sym::doc) { + match (attr.name_or_empty(), attr.value_str()) { + (sym::html_favicon_url, Some(s)) => { + layout.favicon = s.to_string(); + } + (sym::html_logo_url, Some(s)) => { + layout.logo = s.to_string(); + } + (sym::html_playground_url, Some(s)) => { + playground = Some(markdown::Playground { + crate_name: Some(krate.name(tcx).to_string()), + url: s.to_string(), + }); + } + (sym::issue_tracker_base_url, Some(s)) => { + issue_tracker_base_url = Some(s.to_string()); + } + (sym::html_no_source, None) if attr.is_word() => { + include_sources = false; + } + _ => {} + } + } + + let (local_sources, matches) = collect_spans_and_sources( + tcx, + &krate, + &src_root, + include_sources, + generate_link_to_definition, + ); + + let (sender, receiver) = channel(); + let mut scx = SharedContext { + tcx, + src_root, + local_sources, + issue_tracker_base_url, + layout, + created_dirs: Default::default(), + module_sorting, + style_files, + resource_suffix, + static_root_path, + fs: DocFS::new(sender), + codes: ErrorCodes::from(unstable_features.is_nightly_build()), + playground, + all: RefCell::new(AllTypes::new()), + errors: receiver, + redirections: if generate_redirect_map { Some(Default::default()) } else { None }, + show_type_layout, + span_correspondance_map: matches, + cache, + call_locations, + }; + + // Add the default themes to the `Vec` of stylepaths + // + // Note that these must be added before `sources::render` is called + // so that the resulting source pages are styled + // + // `light.css` is not disabled because it is the stylesheet that stays loaded + // by the browser as the theme stylesheet. The theme system (hackily) works by + // changing the href to this stylesheet. All other themes are disabled to + // prevent rule conflicts + scx.style_files.push(StylePath { path: PathBuf::from("light.css") }); + scx.style_files.push(StylePath { path: PathBuf::from("dark.css") }); + scx.style_files.push(StylePath { path: PathBuf::from("ayu.css") }); + + let dst = output; + scx.ensure_dir(&dst)?; + + let mut cx = Context { + current: Vec::new(), + dst, + render_redirect_pages: false, + id_map, + deref_id_map: FxHashMap::default(), + shared: Rc::new(scx), + include_sources, + }; + + if emit_crate { + sources::render(&mut cx, &krate)?; + } + + if !no_emit_shared { + // Build our search index + let index = build_index(&krate, &mut Rc::get_mut(&mut cx.shared).unwrap().cache, tcx); + + // Write shared runs within a flock; disable thread dispatching of IO temporarily. + Rc::get_mut(&mut cx.shared).unwrap().fs.set_sync_only(true); + write_shared(&mut cx, &krate, index, &md_opts)?; + Rc::get_mut(&mut cx.shared).unwrap().fs.set_sync_only(false); + } + + Ok((cx, krate)) + } + + fn make_child_renderer(&self) -> Self { + Self { + current: self.current.clone(), + dst: self.dst.clone(), + render_redirect_pages: self.render_redirect_pages, + deref_id_map: FxHashMap::default(), + id_map: IdMap::new(), + shared: Rc::clone(&self.shared), + include_sources: self.include_sources, + } + } + + fn after_krate(&mut self) -> Result<(), Error> { + let crate_name = self.tcx().crate_name(LOCAL_CRATE); + let final_file = self.dst.join(crate_name.as_str()).join("all.html"); + let settings_file = self.dst.join("settings.html"); + let scrape_examples_help_file = self.dst.join("scrape-examples-help.html"); + + let mut root_path = self.dst.to_str().expect("invalid path").to_owned(); + if !root_path.ends_with('/') { + root_path.push('/'); + } + let shared = Rc::clone(&self.shared); + let mut page = layout::Page { + title: "List of all items in this crate", + css_class: "mod", + root_path: "../", + static_root_path: shared.static_root_path.as_deref(), + description: "List of all items in this crate", + keywords: BASIC_KEYWORDS, + resource_suffix: &shared.resource_suffix, + }; + let sidebar = if shared.cache.crate_version.is_some() { + format!("<h2 class=\"location\">Crate {}</h2>", crate_name) + } else { + String::new() + }; + let all = shared.all.replace(AllTypes::new()); + let v = layout::render( + &shared.layout, + &page, + sidebar, + |buf: &mut Buffer| all.print(buf), + &shared.style_files, + ); + shared.fs.write(final_file, v)?; + + // Generating settings page. + page.title = "Rustdoc settings"; + page.description = "Settings of Rustdoc"; + page.root_path = "./"; + + let sidebar = "<h2 class=\"location\">Settings</h2><div class=\"sidebar-elems\"></div>"; + let v = layout::render( + &shared.layout, + &page, + sidebar, + |buf: &mut Buffer| { + write!( + buf, + "<div class=\"main-heading\">\ + <h1 class=\"fqn\">\ + <span class=\"in-band\">Rustdoc settings</span>\ + </h1>\ + <span class=\"out-of-band\">\ + <a id=\"back\" href=\"javascript:void(0)\" onclick=\"history.back();\">\ + Back\ + </a>\ + </span>\ + </div>\ + <noscript>\ + <section>\ + You need to enable Javascript be able to update your settings.\ + </section>\ + </noscript>\ + <link rel=\"stylesheet\" type=\"text/css\" \ + href=\"{root_path}settings{suffix}.css\">\ + <script defer src=\"{root_path}settings{suffix}.js\"></script>", + root_path = page.static_root_path.unwrap_or(""), + suffix = page.resource_suffix, + ) + }, + &shared.style_files, + ); + shared.fs.write(settings_file, v)?; + + if shared.layout.scrape_examples_extension { + page.title = "About scraped examples"; + page.description = "How the scraped examples feature works in Rustdoc"; + let v = layout::render( + &shared.layout, + &page, + "", + scrape_examples_help(&*shared), + &shared.style_files, + ); + shared.fs.write(scrape_examples_help_file, v)?; + } + + if let Some(ref redirections) = shared.redirections { + if !redirections.borrow().is_empty() { + let redirect_map_path = + self.dst.join(crate_name.as_str()).join("redirect-map.json"); + let paths = serde_json::to_string(&*redirections.borrow()).unwrap(); + shared.ensure_dir(&self.dst.join(crate_name.as_str()))?; + shared.fs.write(redirect_map_path, paths)?; + } + } + + // No need for it anymore. + drop(shared); + + // Flush pending errors. + Rc::get_mut(&mut self.shared).unwrap().fs.close(); + let nb_errors = + self.shared.errors.iter().map(|err| self.tcx().sess.struct_err(&err).emit()).count(); + if nb_errors > 0 { + Err(Error::new(io::Error::new(io::ErrorKind::Other, "I/O error"), "")) + } else { + Ok(()) + } + } + + fn mod_item_in(&mut self, item: &clean::Item) -> Result<(), Error> { + // Stripped modules survive the rustdoc passes (i.e., `strip-private`) + // if they contain impls for public types. These modules can also + // contain items such as publicly re-exported structures. + // + // External crates will provide links to these structures, so + // these modules are recursed into, but not rendered normally + // (a flag on the context). + if !self.render_redirect_pages { + self.render_redirect_pages = item.is_stripped(); + } + let item_name = item.name.unwrap(); + self.dst.push(&*item_name.as_str()); + self.current.push(item_name); + + info!("Recursing into {}", self.dst.display()); + + let buf = self.render_item(item, true); + // buf will be empty if the module is stripped and there is no redirect for it + if !buf.is_empty() { + self.shared.ensure_dir(&self.dst)?; + let joint_dst = self.dst.join("index.html"); + self.shared.fs.write(joint_dst, buf)?; + } + + // Render sidebar-items.js used throughout this module. + if !self.render_redirect_pages { + let (clean::StrippedItem(box clean::ModuleItem(ref module)) | clean::ModuleItem(ref module)) = *item.kind + else { unreachable!() }; + let items = self.build_sidebar_items(module); + let js_dst = self.dst.join(&format!("sidebar-items{}.js", self.shared.resource_suffix)); + let v = format!("window.SIDEBAR_ITEMS = {};", serde_json::to_string(&items).unwrap()); + self.shared.fs.write(js_dst, v)?; + } + Ok(()) + } + + fn mod_item_out(&mut self) -> Result<(), Error> { + info!("Recursed; leaving {}", self.dst.display()); + + // Go back to where we were at + self.dst.pop(); + self.current.pop(); + Ok(()) + } + + fn item(&mut self, item: clean::Item) -> Result<(), Error> { + // Stripped modules survive the rustdoc passes (i.e., `strip-private`) + // if they contain impls for public types. These modules can also + // contain items such as publicly re-exported structures. + // + // External crates will provide links to these structures, so + // these modules are recursed into, but not rendered normally + // (a flag on the context). + if !self.render_redirect_pages { + self.render_redirect_pages = item.is_stripped(); + } + + let buf = self.render_item(&item, false); + // buf will be empty if the item is stripped and there is no redirect for it + if !buf.is_empty() { + let name = item.name.as_ref().unwrap(); + let item_type = item.type_(); + let file_name = &item_path(item_type, name.as_str()); + self.shared.ensure_dir(&self.dst)?; + let joint_dst = self.dst.join(file_name); + self.shared.fs.write(joint_dst, buf)?; + + if !self.render_redirect_pages { + self.shared.all.borrow_mut().append(full_path(self, &item), &item_type); + } + // If the item is a macro, redirect from the old macro URL (with !) + // to the new one (without). + if item_type == ItemType::Macro { + let redir_name = format!("{}.{}!.html", item_type, name); + if let Some(ref redirections) = self.shared.redirections { + let crate_name = &self.shared.layout.krate; + redirections.borrow_mut().insert( + format!("{}/{}", crate_name, redir_name), + format!("{}/{}", crate_name, file_name), + ); + } else { + let v = layout::redirect(file_name); + let redir_dst = self.dst.join(redir_name); + self.shared.fs.write(redir_dst, v)?; + } + } + } + Ok(()) + } + + fn cache(&self) -> &Cache { + &self.shared.cache + } +} + +fn make_item_keywords(it: &clean::Item) -> String { + format!("{}, {}", BASIC_KEYWORDS, it.name.as_ref().unwrap()) +} diff --git a/src/librustdoc/html/render/mod.rs b/src/librustdoc/html/render/mod.rs new file mode 100644 index 000000000..a262c8f7d --- /dev/null +++ b/src/librustdoc/html/render/mod.rs @@ -0,0 +1,2849 @@ +//! Rustdoc's HTML rendering module. +//! +//! This modules contains the bulk of the logic necessary for rendering a +//! rustdoc `clean::Crate` instance to a set of static HTML pages. This +//! rendering process is largely driven by the `format!` syntax extension to +//! perform all I/O into files and streams. +//! +//! The rendering process is largely driven by the `Context` and `Cache` +//! structures. The cache is pre-populated by crawling the crate in question, +//! and then it is shared among the various rendering threads. The cache is meant +//! to be a fairly large structure not implementing `Clone` (because it's shared +//! among threads). The context, however, should be a lightweight structure. This +//! is cloned per-thread and contains information about what is currently being +//! rendered. +//! +//! In order to speed up rendering (mostly because of markdown rendering), the +//! rendering process has been parallelized. This parallelization is only +//! exposed through the `crate` method on the context, and then also from the +//! fact that the shared cache is stored in TLS (and must be accessed as such). +//! +//! In addition to rendering the crate itself, this module is also responsible +//! for creating the corresponding search index and source file renderings. +//! These threads are not parallelized (they haven't been a bottleneck yet), and +//! both occur before the crate is rendered. + +pub(crate) mod search_index; + +#[cfg(test)] +mod tests; + +mod context; +mod print_item; +mod span_map; +mod write_shared; + +pub(crate) use self::context::*; +pub(crate) use self::span_map::{collect_spans_and_sources, LinkFromSrc}; + +use std::collections::VecDeque; +use std::default::Default; +use std::fmt; +use std::fs; +use std::iter::Peekable; +use std::path::PathBuf; +use std::rc::Rc; +use std::str; +use std::string::ToString; + +use rustc_ast_pretty::pprust; +use rustc_attr::{ConstStability, Deprecation, StabilityLevel}; +use rustc_data_structures::fx::{FxHashMap, FxHashSet}; +use rustc_hir::def::CtorKind; +use rustc_hir::def_id::DefId; +use rustc_hir::Mutability; +use rustc_middle::middle::stability; +use rustc_middle::ty; +use rustc_middle::ty::TyCtxt; +use rustc_span::{ + symbol::{sym, Symbol}, + BytePos, FileName, RealFileName, +}; +use serde::ser::SerializeSeq; +use serde::{Serialize, Serializer}; + +use crate::clean::{self, ItemId, RenderedLink, SelfTy}; +use crate::error::Error; +use crate::formats::cache::Cache; +use crate::formats::item_type::ItemType; +use crate::formats::{AssocItemRender, Impl, RenderMode}; +use crate::html::escape::Escape; +use crate::html::format::{ + href, join_with_double_colon, print_abi_with_space, print_constness_with_space, + print_default_space, print_generic_bounds, print_where_clause, Buffer, Ending, HrefError, + PrintWithSpace, +}; +use crate::html::highlight; +use crate::html::markdown::{HeadingOffset, IdMap, Markdown, MarkdownHtml, MarkdownSummaryLine}; +use crate::html::sources; +use crate::html::static_files::SCRAPE_EXAMPLES_HELP_MD; +use crate::scrape_examples::{CallData, CallLocation}; +use crate::try_none; +use crate::DOC_RUST_LANG_ORG_CHANNEL; + +/// A pair of name and its optional document. +pub(crate) type NameDoc = (String, Option<String>); + +pub(crate) fn ensure_trailing_slash(v: &str) -> impl fmt::Display + '_ { + crate::html::format::display_fn(move |f| { + if !v.ends_with('/') && !v.is_empty() { write!(f, "{}/", v) } else { f.write_str(v) } + }) +} + +// Helper structs for rendering items/sidebars and carrying along contextual +// information + +/// Struct representing one entry in the JS search index. These are all emitted +/// by hand to a large JS file at the end of cache-creation. +#[derive(Debug)] +pub(crate) struct IndexItem { + pub(crate) ty: ItemType, + pub(crate) name: String, + pub(crate) path: String, + pub(crate) desc: String, + pub(crate) parent: Option<DefId>, + pub(crate) parent_idx: Option<usize>, + pub(crate) search_type: Option<IndexItemFunctionType>, + pub(crate) aliases: Box<[Symbol]>, +} + +/// A type used for the search index. +#[derive(Debug)] +pub(crate) struct RenderType { + id: Option<RenderTypeId>, + generics: Option<Vec<RenderType>>, +} + +impl Serialize for RenderType { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + let id = match &self.id { + // 0 is a sentinel, everything else is one-indexed + None => 0, + Some(RenderTypeId::Index(idx)) => idx + 1, + _ => panic!("must convert render types to indexes before serializing"), + }; + if let Some(generics) = &self.generics { + let mut seq = serializer.serialize_seq(None)?; + seq.serialize_element(&id)?; + seq.serialize_element(generics)?; + seq.end() + } else { + id.serialize(serializer) + } + } +} + +#[derive(Clone, Debug)] +pub(crate) enum RenderTypeId { + DefId(DefId), + Primitive(clean::PrimitiveType), + Index(usize), +} + +/// Full type of functions/methods in the search index. +#[derive(Debug)] +pub(crate) struct IndexItemFunctionType { + inputs: Vec<RenderType>, + output: Vec<RenderType>, +} + +impl Serialize for IndexItemFunctionType { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + // If we couldn't figure out a type, just write `0`. + let has_missing = self + .inputs + .iter() + .chain(self.output.iter()) + .any(|i| i.id.is_none() && i.generics.is_none()); + if has_missing { + 0.serialize(serializer) + } else { + let mut seq = serializer.serialize_seq(None)?; + match &self.inputs[..] { + [one] if one.generics.is_none() => seq.serialize_element(one)?, + _ => seq.serialize_element(&self.inputs)?, + } + match &self.output[..] { + [] => {} + [one] if one.generics.is_none() => seq.serialize_element(one)?, + _ => seq.serialize_element(&self.output)?, + } + seq.end() + } + } +} + +#[derive(Debug, Clone)] +pub(crate) struct StylePath { + /// The path to the theme + pub(crate) path: PathBuf, +} + +impl StylePath { + pub(crate) fn basename(&self) -> Result<String, Error> { + Ok(try_none!(try_none!(self.path.file_stem(), &self.path).to_str(), &self.path).to_string()) + } +} + +fn write_srclink(cx: &Context<'_>, item: &clean::Item, buf: &mut Buffer) { + if let Some(l) = cx.src_href(item) { + write!(buf, "<a class=\"srclink\" href=\"{}\">source</a>", l) + } +} + +#[derive(Debug, Eq, PartialEq, Hash)] +struct ItemEntry { + url: String, + name: String, +} + +impl ItemEntry { + fn new(mut url: String, name: String) -> ItemEntry { + while url.starts_with('/') { + url.remove(0); + } + ItemEntry { url, name } + } +} + +impl ItemEntry { + pub(crate) fn print(&self) -> impl fmt::Display + '_ { + crate::html::format::display_fn(move |f| { + write!(f, "<a href=\"{}\">{}</a>", self.url, Escape(&self.name)) + }) + } +} + +impl PartialOrd for ItemEntry { + fn partial_cmp(&self, other: &ItemEntry) -> Option<::std::cmp::Ordering> { + Some(self.cmp(other)) + } +} + +impl Ord for ItemEntry { + fn cmp(&self, other: &ItemEntry) -> ::std::cmp::Ordering { + self.name.cmp(&other.name) + } +} + +#[derive(Debug)] +struct AllTypes { + structs: FxHashSet<ItemEntry>, + enums: FxHashSet<ItemEntry>, + unions: FxHashSet<ItemEntry>, + primitives: FxHashSet<ItemEntry>, + traits: FxHashSet<ItemEntry>, + macros: FxHashSet<ItemEntry>, + functions: FxHashSet<ItemEntry>, + typedefs: FxHashSet<ItemEntry>, + opaque_tys: FxHashSet<ItemEntry>, + statics: FxHashSet<ItemEntry>, + constants: FxHashSet<ItemEntry>, + attributes: FxHashSet<ItemEntry>, + derives: FxHashSet<ItemEntry>, + trait_aliases: FxHashSet<ItemEntry>, +} + +impl AllTypes { + fn new() -> AllTypes { + let new_set = |cap| FxHashSet::with_capacity_and_hasher(cap, Default::default()); + AllTypes { + structs: new_set(100), + enums: new_set(100), + unions: new_set(100), + primitives: new_set(26), + traits: new_set(100), + macros: new_set(100), + functions: new_set(100), + typedefs: new_set(100), + opaque_tys: new_set(100), + statics: new_set(100), + constants: new_set(100), + attributes: new_set(100), + derives: new_set(100), + trait_aliases: new_set(100), + } + } + + fn append(&mut self, item_name: String, item_type: &ItemType) { + let mut url: Vec<_> = item_name.split("::").skip(1).collect(); + if let Some(name) = url.pop() { + let new_url = format!("{}/{}.{}.html", url.join("/"), item_type, name); + url.push(name); + let name = url.join("::"); + match *item_type { + ItemType::Struct => self.structs.insert(ItemEntry::new(new_url, name)), + ItemType::Enum => self.enums.insert(ItemEntry::new(new_url, name)), + ItemType::Union => self.unions.insert(ItemEntry::new(new_url, name)), + ItemType::Primitive => self.primitives.insert(ItemEntry::new(new_url, name)), + ItemType::Trait => self.traits.insert(ItemEntry::new(new_url, name)), + ItemType::Macro => self.macros.insert(ItemEntry::new(new_url, name)), + ItemType::Function => self.functions.insert(ItemEntry::new(new_url, name)), + ItemType::Typedef => self.typedefs.insert(ItemEntry::new(new_url, name)), + ItemType::OpaqueTy => self.opaque_tys.insert(ItemEntry::new(new_url, name)), + ItemType::Static => self.statics.insert(ItemEntry::new(new_url, name)), + ItemType::Constant => self.constants.insert(ItemEntry::new(new_url, name)), + ItemType::ProcAttribute => self.attributes.insert(ItemEntry::new(new_url, name)), + ItemType::ProcDerive => self.derives.insert(ItemEntry::new(new_url, name)), + ItemType::TraitAlias => self.trait_aliases.insert(ItemEntry::new(new_url, name)), + _ => true, + }; + } + } +} + +impl AllTypes { + fn print(self, f: &mut Buffer) { + fn print_entries(f: &mut Buffer, e: &FxHashSet<ItemEntry>, title: &str, class: &str) { + if !e.is_empty() { + let mut e: Vec<&ItemEntry> = e.iter().collect(); + e.sort(); + write!( + f, + "<h3 id=\"{}\">{}</h3><ul class=\"{} docblock\">", + title.replace(' ', "-"), // IDs cannot contain whitespaces. + title, + class + ); + + for s in e.iter() { + write!(f, "<li>{}</li>", s.print()); + } + + f.write_str("</ul>"); + } + } + + f.write_str( + "<h1 class=\"fqn\">\ + <span class=\"in-band\">List of all items</span>\ + </h1>", + ); + // Note: print_entries does not escape the title, because we know the current set of titles + // doesn't require escaping. + print_entries(f, &self.structs, "Structs", "structs"); + print_entries(f, &self.enums, "Enums", "enums"); + print_entries(f, &self.unions, "Unions", "unions"); + print_entries(f, &self.primitives, "Primitives", "primitives"); + print_entries(f, &self.traits, "Traits", "traits"); + print_entries(f, &self.macros, "Macros", "macros"); + print_entries(f, &self.attributes, "Attribute Macros", "attributes"); + print_entries(f, &self.derives, "Derive Macros", "derives"); + print_entries(f, &self.functions, "Functions", "functions"); + print_entries(f, &self.typedefs, "Typedefs", "typedefs"); + print_entries(f, &self.trait_aliases, "Trait Aliases", "trait-aliases"); + print_entries(f, &self.opaque_tys, "Opaque Types", "opaque-types"); + print_entries(f, &self.statics, "Statics", "statics"); + print_entries(f, &self.constants, "Constants", "constants") + } +} + +fn scrape_examples_help(shared: &SharedContext<'_>) -> String { + let mut content = SCRAPE_EXAMPLES_HELP_MD.to_owned(); + content.push_str(&format!( + "## More information\n\n\ + If you want more information about this feature, please read the [corresponding chapter in the Rustdoc book]({}/rustdoc/scraped-examples.html).", + DOC_RUST_LANG_ORG_CHANNEL)); + + let mut ids = IdMap::default(); + format!( + "<div class=\"main-heading\">\ + <h1 class=\"fqn\">\ + <span class=\"in-band\">About scraped examples</span>\ + </h1>\ + </div>\ + <div>{}</div>", + Markdown { + content: &content, + links: &[], + ids: &mut ids, + error_codes: shared.codes, + edition: shared.edition(), + playground: &shared.playground, + heading_offset: HeadingOffset::H1 + } + .into_string() + ) +} + +fn document( + w: &mut Buffer, + cx: &mut Context<'_>, + item: &clean::Item, + parent: Option<&clean::Item>, + heading_offset: HeadingOffset, +) { + if let Some(ref name) = item.name { + info!("Documenting {}", name); + } + document_item_info(w, cx, item, parent); + if parent.is_none() { + document_full_collapsible(w, item, cx, heading_offset); + } else { + document_full(w, item, cx, heading_offset); + } +} + +/// Render md_text as markdown. +fn render_markdown( + w: &mut Buffer, + cx: &mut Context<'_>, + md_text: &str, + links: Vec<RenderedLink>, + heading_offset: HeadingOffset, +) { + write!( + w, + "<div class=\"docblock\">{}</div>", + Markdown { + content: md_text, + links: &links, + ids: &mut cx.id_map, + error_codes: cx.shared.codes, + edition: cx.shared.edition(), + playground: &cx.shared.playground, + heading_offset, + } + .into_string() + ) +} + +/// Writes a documentation block containing only the first paragraph of the documentation. If the +/// docs are longer, a "Read more" link is appended to the end. +fn document_short( + w: &mut Buffer, + item: &clean::Item, + cx: &mut Context<'_>, + link: AssocItemLink<'_>, + parent: &clean::Item, + show_def_docs: bool, +) { + document_item_info(w, cx, item, Some(parent)); + if !show_def_docs { + return; + } + if let Some(s) = item.doc_value() { + let mut summary_html = MarkdownSummaryLine(&s, &item.links(cx)).into_string(); + + if s.contains('\n') { + let link = format!(r#" <a{}>Read more</a>"#, assoc_href_attr(item, link, cx)); + + if let Some(idx) = summary_html.rfind("</p>") { + summary_html.insert_str(idx, &link); + } else { + summary_html.push_str(&link); + } + } + + write!(w, "<div class='docblock'>{}</div>", summary_html,); + } +} + +fn document_full_collapsible( + w: &mut Buffer, + item: &clean::Item, + cx: &mut Context<'_>, + heading_offset: HeadingOffset, +) { + document_full_inner(w, item, cx, true, heading_offset); +} + +fn document_full( + w: &mut Buffer, + item: &clean::Item, + cx: &mut Context<'_>, + heading_offset: HeadingOffset, +) { + document_full_inner(w, item, cx, false, heading_offset); +} + +fn document_full_inner( + w: &mut Buffer, + item: &clean::Item, + cx: &mut Context<'_>, + is_collapsible: bool, + heading_offset: HeadingOffset, +) { + if let Some(s) = item.collapsed_doc_value() { + debug!("Doc block: =====\n{}\n=====", s); + if is_collapsible { + w.write_str( + "<details class=\"rustdoc-toggle top-doc\" open>\ + <summary class=\"hideme\">\ + <span>Expand description</span>\ + </summary>", + ); + render_markdown(w, cx, &s, item.links(cx), heading_offset); + w.write_str("</details>"); + } else { + render_markdown(w, cx, &s, item.links(cx), heading_offset); + } + } + + let kind = match &*item.kind { + clean::ItemKind::StrippedItem(box kind) | kind => kind, + }; + + if let clean::ItemKind::FunctionItem(..) | clean::ItemKind::MethodItem(..) = kind { + render_call_locations(w, cx, item); + } +} + +/// Add extra information about an item such as: +/// +/// * Stability +/// * Deprecated +/// * Required features (through the `doc_cfg` feature) +fn document_item_info( + w: &mut Buffer, + cx: &mut Context<'_>, + item: &clean::Item, + parent: Option<&clean::Item>, +) { + let item_infos = short_item_info(item, cx, parent); + if !item_infos.is_empty() { + w.write_str("<span class=\"item-info\">"); + for info in item_infos { + w.write_str(&info); + } + w.write_str("</span>"); + } +} + +fn portability(item: &clean::Item, parent: Option<&clean::Item>) -> Option<String> { + let cfg = match (&item.cfg, parent.and_then(|p| p.cfg.as_ref())) { + (Some(cfg), Some(parent_cfg)) => cfg.simplify_with(parent_cfg), + (cfg, _) => cfg.as_deref().cloned(), + }; + + debug!("Portability {:?} - {:?} = {:?}", item.cfg, parent.and_then(|p| p.cfg.as_ref()), cfg); + + Some(format!("<div class=\"stab portability\">{}</div>", cfg?.render_long_html())) +} + +/// Render the stability, deprecation and portability information that is displayed at the top of +/// the item's documentation. +fn short_item_info( + item: &clean::Item, + cx: &mut Context<'_>, + parent: Option<&clean::Item>, +) -> Vec<String> { + let mut extra_info = vec![]; + let error_codes = cx.shared.codes; + + if let Some(depr @ Deprecation { note, since, is_since_rustc_version: _, suggestion: _ }) = + item.deprecation(cx.tcx()) + { + // We display deprecation messages for #[deprecated], but only display + // the future-deprecation messages for rustc versions. + let mut message = if let Some(since) = since { + let since = since.as_str(); + if !stability::deprecation_in_effect(&depr) { + if since == "TBD" { + String::from("Deprecating in a future Rust version") + } else { + format!("Deprecating in {}", Escape(since)) + } + } else { + format!("Deprecated since {}", Escape(since)) + } + } else { + String::from("Deprecated") + }; + + if let Some(note) = note { + let note = note.as_str(); + let html = MarkdownHtml( + note, + &mut cx.id_map, + error_codes, + cx.shared.edition(), + &cx.shared.playground, + ); + message.push_str(&format!(": {}", html.into_string())); + } + extra_info.push(format!( + "<div class=\"stab deprecated\"><span class=\"emoji\">👎</span> {}</div>", + message, + )); + } + + // Render unstable items. But don't render "rustc_private" crates (internal compiler crates). + // Those crates are permanently unstable so it makes no sense to render "unstable" everywhere. + if let Some((StabilityLevel::Unstable { reason: _, issue, .. }, feature)) = item + .stability(cx.tcx()) + .as_ref() + .filter(|stab| stab.feature != sym::rustc_private) + .map(|stab| (stab.level, stab.feature)) + { + let mut message = + "<span class=\"emoji\">🔬</span> This is a nightly-only experimental API.".to_owned(); + + let mut feature = format!("<code>{}</code>", Escape(feature.as_str())); + if let (Some(url), Some(issue)) = (&cx.shared.issue_tracker_base_url, issue) { + feature.push_str(&format!( + " <a href=\"{url}{issue}\">#{issue}</a>", + url = url, + issue = issue + )); + } + + message.push_str(&format!(" ({})", feature)); + + extra_info.push(format!("<div class=\"stab unstable\">{}</div>", message)); + } + + if let Some(portability) = portability(item, parent) { + extra_info.push(portability); + } + + extra_info +} + +// Render the list of items inside one of the sections "Trait Implementations", +// "Auto Trait Implementations," "Blanket Trait Implementations" (on struct/enum pages). +fn render_impls( + cx: &mut Context<'_>, + w: &mut Buffer, + impls: &[&&Impl], + containing_item: &clean::Item, + toggle_open_by_default: bool, +) { + let tcx = cx.tcx(); + let mut rendered_impls = impls + .iter() + .map(|i| { + let did = i.trait_did().unwrap(); + let provided_trait_methods = i.inner_impl().provided_trait_methods(tcx); + let assoc_link = AssocItemLink::GotoSource(did.into(), &provided_trait_methods); + let mut buffer = if w.is_for_html() { Buffer::html() } else { Buffer::new() }; + render_impl( + &mut buffer, + cx, + i, + containing_item, + assoc_link, + RenderMode::Normal, + None, + &[], + ImplRenderingParameters { + show_def_docs: true, + show_default_items: true, + show_non_assoc_items: true, + toggle_open_by_default, + }, + ); + buffer.into_inner() + }) + .collect::<Vec<_>>(); + rendered_impls.sort(); + w.write_str(&rendered_impls.join("")); +} + +/// Build a (possibly empty) `href` attribute (a key-value pair) for the given associated item. +fn assoc_href_attr(it: &clean::Item, link: AssocItemLink<'_>, cx: &Context<'_>) -> String { + let name = it.name.unwrap(); + let item_type = it.type_(); + + let href = match link { + AssocItemLink::Anchor(Some(ref id)) => Some(format!("#{}", id)), + AssocItemLink::Anchor(None) => Some(format!("#{}.{}", item_type, name)), + AssocItemLink::GotoSource(did, provided_methods) => { + // We're creating a link from the implementation of an associated item to its + // declaration in the trait declaration. + let item_type = match item_type { + // For historical but not technical reasons, the item type of methods in + // trait declarations depends on whether the method is required (`TyMethod`) or + // provided (`Method`). + ItemType::Method | ItemType::TyMethod => { + if provided_methods.contains(&name) { + ItemType::Method + } else { + ItemType::TyMethod + } + } + // For associated types and constants, no such distinction exists. + item_type => item_type, + }; + + match href(did.expect_def_id(), cx) { + Ok((url, ..)) => Some(format!("{}#{}.{}", url, item_type, name)), + // The link is broken since it points to an external crate that wasn't documented. + // Do not create any link in such case. This is better than falling back to a + // dummy anchor like `#{item_type}.{name}` representing the `id` of *this* impl item + // (that used to happen in older versions). Indeed, in most cases this dummy would + // coincide with the `id`. However, it would not always do so. + // In general, this dummy would be incorrect: + // If the type with the trait impl also had an inherent impl with an assoc. item of + // the *same* name as this impl item, the dummy would link to that one even though + // those two items are distinct! + // In this scenario, the actual `id` of this impl item would be + // `#{item_type}.{name}-{n}` for some number `n` (a disambiguator). + Err(HrefError::DocumentationNotBuilt) => None, + Err(_) => Some(format!("#{}.{}", item_type, name)), + } + } + }; + + // If there is no `href` for the reason explained above, simply do not render it which is valid: + // https://html.spec.whatwg.org/multipage/links.html#links-created-by-a-and-area-elements + href.map(|href| format!(" href=\"{}\"", href)).unwrap_or_default() +} + +fn assoc_const( + w: &mut Buffer, + it: &clean::Item, + ty: &clean::Type, + default: Option<&clean::ConstantKind>, + link: AssocItemLink<'_>, + extra: &str, + cx: &Context<'_>, +) { + write!( + w, + "{extra}{vis}const <a{href} class=\"constant\">{name}</a>: {ty}", + extra = extra, + vis = it.visibility.print_with_space(it.item_id, cx), + href = assoc_href_attr(it, link, cx), + name = it.name.as_ref().unwrap(), + ty = ty.print(cx), + ); + if let Some(default) = default { + write!(w, " = "); + + // FIXME: `.value()` uses `clean::utils::format_integer_with_underscore_sep` under the + // hood which adds noisy underscores and a type suffix to number literals. + // This hurts readability in this context especially when more complex expressions + // are involved and it doesn't add much of value. + // Find a way to print constants here without all that jazz. + write!(w, "{}", Escape(&default.value(cx.tcx()).unwrap_or_else(|| default.expr(cx.tcx())))); + } +} + +fn assoc_type( + w: &mut Buffer, + it: &clean::Item, + generics: &clean::Generics, + bounds: &[clean::GenericBound], + default: Option<&clean::Type>, + link: AssocItemLink<'_>, + indent: usize, + cx: &Context<'_>, +) { + write!( + w, + "{indent}type <a{href} class=\"associatedtype\">{name}</a>{generics}", + indent = " ".repeat(indent), + href = assoc_href_attr(it, link, cx), + name = it.name.as_ref().unwrap(), + generics = generics.print(cx), + ); + if !bounds.is_empty() { + write!(w, ": {}", print_generic_bounds(bounds, cx)) + } + write!(w, "{}", print_where_clause(generics, cx, indent, Ending::NoNewline)); + if let Some(default) = default { + write!(w, " = {}", default.print(cx)) + } +} + +fn assoc_method( + w: &mut Buffer, + meth: &clean::Item, + g: &clean::Generics, + d: &clean::FnDecl, + link: AssocItemLink<'_>, + parent: ItemType, + cx: &Context<'_>, + render_mode: RenderMode, +) { + let header = meth.fn_header(cx.tcx()).expect("Trying to get header from a non-function item"); + let name = meth.name.as_ref().unwrap(); + let vis = meth.visibility.print_with_space(meth.item_id, cx).to_string(); + // FIXME: Once https://github.com/rust-lang/rust/issues/67792 is implemented, we can remove + // this condition. + let constness = match render_mode { + RenderMode::Normal => { + print_constness_with_space(&header.constness, meth.const_stability(cx.tcx())) + } + RenderMode::ForDeref { .. } => "", + }; + let asyncness = header.asyncness.print_with_space(); + let unsafety = header.unsafety.print_with_space(); + let defaultness = print_default_space(meth.is_default()); + let abi = print_abi_with_space(header.abi).to_string(); + let href = assoc_href_attr(meth, link, cx); + + // NOTE: `{:#}` does not print HTML formatting, `{}` does. So `g.print` can't be reused between the length calculation and `write!`. + let generics_len = format!("{:#}", g.print(cx)).len(); + let mut header_len = "fn ".len() + + vis.len() + + constness.len() + + asyncness.len() + + unsafety.len() + + defaultness.len() + + abi.len() + + name.as_str().len() + + generics_len; + + let (indent, indent_str, end_newline) = if parent == ItemType::Trait { + header_len += 4; + let indent_str = " "; + render_attributes_in_pre(w, meth, indent_str); + (4, indent_str, Ending::NoNewline) + } else { + render_attributes_in_code(w, meth); + (0, "", Ending::Newline) + }; + w.reserve(header_len + "<a href=\"\" class=\"fnname\">{".len() + "</a>".len()); + write!( + w, + "{indent}{vis}{constness}{asyncness}{unsafety}{defaultness}{abi}fn <a{href} class=\"fnname\">{name}</a>\ + {generics}{decl}{notable_traits}{where_clause}", + indent = indent_str, + vis = vis, + constness = constness, + asyncness = asyncness, + unsafety = unsafety, + defaultness = defaultness, + abi = abi, + href = href, + name = name, + generics = g.print(cx), + decl = d.full_print(header_len, indent, header.asyncness, cx), + notable_traits = notable_traits_decl(d, cx), + where_clause = print_where_clause(g, cx, indent, end_newline), + ) +} + +/// Writes a span containing the versions at which an item became stable and/or const-stable. For +/// example, if the item became stable at 1.0.0, and const-stable at 1.45.0, this function would +/// write a span containing "1.0.0 (const: 1.45.0)". +/// +/// Returns `true` if a stability annotation was rendered. +/// +/// Stability and const-stability are considered separately. If the item is unstable, no version +/// will be written. If the item is const-unstable, "const: unstable" will be appended to the +/// span, with a link to the tracking issue if present. If an item's stability or const-stability +/// version matches the version of its enclosing item, that version will be omitted. +/// +/// Note that it is possible for an unstable function to be const-stable. In that case, the span +/// will include the const-stable version, but no stable version will be emitted, as a natural +/// consequence of the above rules. +fn render_stability_since_raw( + w: &mut Buffer, + ver: Option<Symbol>, + const_stability: Option<ConstStability>, + containing_ver: Option<Symbol>, + containing_const_ver: Option<Symbol>, +) -> bool { + let stable_version = ver.filter(|inner| !inner.is_empty() && Some(*inner) != containing_ver); + + let mut title = String::new(); + let mut stability = String::new(); + + if let Some(ver) = stable_version { + stability.push_str(ver.as_str()); + title.push_str(&format!("Stable since Rust version {}", ver)); + } + + let const_title_and_stability = match const_stability { + Some(ConstStability { level: StabilityLevel::Stable { since, .. }, .. }) + if Some(since) != containing_const_ver => + { + Some((format!("const since {}", since), format!("const: {}", since))) + } + Some(ConstStability { level: StabilityLevel::Unstable { issue, .. }, feature, .. }) => { + let unstable = if let Some(n) = issue { + format!( + r#"<a href="https://github.com/rust-lang/rust/issues/{}" title="Tracking issue for {}">unstable</a>"#, + n, feature + ) + } else { + String::from("unstable") + }; + + Some((String::from("const unstable"), format!("const: {}", unstable))) + } + _ => None, + }; + + if let Some((const_title, const_stability)) = const_title_and_stability { + if !title.is_empty() { + title.push_str(&format!(", {}", const_title)); + } else { + title.push_str(&const_title); + } + + if !stability.is_empty() { + stability.push_str(&format!(" ({})", const_stability)); + } else { + stability.push_str(&const_stability); + } + } + + if !stability.is_empty() { + write!(w, r#"<span class="since" title="{}">{}</span>"#, title, stability); + } + + !stability.is_empty() +} + +fn render_assoc_item( + w: &mut Buffer, + item: &clean::Item, + link: AssocItemLink<'_>, + parent: ItemType, + cx: &Context<'_>, + render_mode: RenderMode, +) { + match &*item.kind { + clean::StrippedItem(..) => {} + clean::TyMethodItem(m) => { + assoc_method(w, item, &m.generics, &m.decl, link, parent, cx, render_mode) + } + clean::MethodItem(m, _) => { + assoc_method(w, item, &m.generics, &m.decl, link, parent, cx, render_mode) + } + kind @ (clean::TyAssocConstItem(ty) | clean::AssocConstItem(ty, _)) => assoc_const( + w, + item, + ty, + match kind { + clean::TyAssocConstItem(_) => None, + clean::AssocConstItem(_, default) => Some(default), + _ => unreachable!(), + }, + link, + if parent == ItemType::Trait { " " } else { "" }, + cx, + ), + clean::TyAssocTypeItem(ref generics, ref bounds) => assoc_type( + w, + item, + generics, + bounds, + None, + link, + if parent == ItemType::Trait { 4 } else { 0 }, + cx, + ), + clean::AssocTypeItem(ref ty, ref bounds) => assoc_type( + w, + item, + &ty.generics, + bounds, + Some(ty.item_type.as_ref().unwrap_or(&ty.type_)), + link, + if parent == ItemType::Trait { 4 } else { 0 }, + cx, + ), + _ => panic!("render_assoc_item called on non-associated-item"), + } +} + +const ALLOWED_ATTRIBUTES: &[Symbol] = + &[sym::export_name, sym::link_section, sym::no_mangle, sym::repr, sym::non_exhaustive]; + +fn attributes(it: &clean::Item) -> Vec<String> { + it.attrs + .other_attrs + .iter() + .filter_map(|attr| { + if ALLOWED_ATTRIBUTES.contains(&attr.name_or_empty()) { + Some( + pprust::attribute_to_string(attr) + .replace("\\\n", "") + .replace('\n', "") + .replace(" ", " "), + ) + } else { + None + } + }) + .collect() +} + +// When an attribute is rendered inside a `<pre>` tag, it is formatted using +// a whitespace prefix and newline. +fn render_attributes_in_pre(w: &mut Buffer, it: &clean::Item, prefix: &str) { + for a in attributes(it) { + writeln!(w, "{}{}", prefix, a); + } +} + +// When an attribute is rendered inside a <code> tag, it is formatted using +// a div to produce a newline after it. +fn render_attributes_in_code(w: &mut Buffer, it: &clean::Item) { + for a in attributes(it) { + write!(w, "<div class=\"code-attribute\">{}</div>", a); + } +} + +#[derive(Copy, Clone)] +enum AssocItemLink<'a> { + Anchor(Option<&'a str>), + GotoSource(ItemId, &'a FxHashSet<Symbol>), +} + +impl<'a> AssocItemLink<'a> { + fn anchor(&self, id: &'a str) -> Self { + match *self { + AssocItemLink::Anchor(_) => AssocItemLink::Anchor(Some(id)), + ref other => *other, + } + } +} + +fn render_assoc_items( + w: &mut Buffer, + cx: &mut Context<'_>, + containing_item: &clean::Item, + it: DefId, + what: AssocItemRender<'_>, +) { + let mut derefs = FxHashSet::default(); + derefs.insert(it); + render_assoc_items_inner(w, cx, containing_item, it, what, &mut derefs) +} + +fn render_assoc_items_inner( + w: &mut Buffer, + cx: &mut Context<'_>, + containing_item: &clean::Item, + it: DefId, + what: AssocItemRender<'_>, + derefs: &mut FxHashSet<DefId>, +) { + info!("Documenting associated items of {:?}", containing_item.name); + let shared = Rc::clone(&cx.shared); + let cache = &shared.cache; + let Some(v) = cache.impls.get(&it) else { return }; + let (non_trait, traits): (Vec<_>, _) = v.iter().partition(|i| i.inner_impl().trait_.is_none()); + if !non_trait.is_empty() { + let mut tmp_buf = Buffer::empty_from(w); + let (render_mode, id) = match what { + AssocItemRender::All => { + tmp_buf.write_str( + "<h2 id=\"implementations\" class=\"small-section-header\">\ + Implementations\ + <a href=\"#implementations\" class=\"anchor\"></a>\ + </h2>", + ); + (RenderMode::Normal, "implementations-list".to_owned()) + } + AssocItemRender::DerefFor { trait_, type_, deref_mut_ } => { + let id = + cx.derive_id(small_url_encode(format!("deref-methods-{:#}", type_.print(cx)))); + if let Some(def_id) = type_.def_id(cx.cache()) { + cx.deref_id_map.insert(def_id, id.clone()); + } + write!( + tmp_buf, + "<h2 id=\"{id}\" class=\"small-section-header\">\ + <span>Methods from {trait_}<Target = {type_}></span>\ + <a href=\"#{id}\" class=\"anchor\"></a>\ + </h2>", + id = id, + trait_ = trait_.print(cx), + type_ = type_.print(cx), + ); + (RenderMode::ForDeref { mut_: deref_mut_ }, cx.derive_id(id)) + } + }; + let mut impls_buf = Buffer::empty_from(w); + for i in &non_trait { + render_impl( + &mut impls_buf, + cx, + i, + containing_item, + AssocItemLink::Anchor(None), + render_mode, + None, + &[], + ImplRenderingParameters { + show_def_docs: true, + show_default_items: true, + show_non_assoc_items: true, + toggle_open_by_default: true, + }, + ); + } + if !impls_buf.is_empty() { + w.push_buffer(tmp_buf); + write!(w, "<div id=\"{}\">", id); + w.push_buffer(impls_buf); + w.write_str("</div>"); + } + } + + if !traits.is_empty() { + let deref_impl = + traits.iter().find(|t| t.trait_did() == cx.tcx().lang_items().deref_trait()); + if let Some(impl_) = deref_impl { + let has_deref_mut = + traits.iter().any(|t| t.trait_did() == cx.tcx().lang_items().deref_mut_trait()); + render_deref_methods(w, cx, impl_, containing_item, has_deref_mut, derefs); + } + + // If we were already one level into rendering deref methods, we don't want to render + // anything after recursing into any further deref methods above. + if let AssocItemRender::DerefFor { .. } = what { + return; + } + + let (synthetic, concrete): (Vec<&&Impl>, Vec<&&Impl>) = + traits.iter().partition(|t| t.inner_impl().kind.is_auto()); + let (blanket_impl, concrete): (Vec<&&Impl>, _) = + concrete.into_iter().partition(|t| t.inner_impl().kind.is_blanket()); + + let mut impls = Buffer::empty_from(w); + render_impls(cx, &mut impls, &concrete, containing_item, true); + let impls = impls.into_inner(); + if !impls.is_empty() { + write!( + w, + "<h2 id=\"trait-implementations\" class=\"small-section-header\">\ + Trait Implementations\ + <a href=\"#trait-implementations\" class=\"anchor\"></a>\ + </h2>\ + <div id=\"trait-implementations-list\">{}</div>", + impls + ); + } + + if !synthetic.is_empty() { + w.write_str( + "<h2 id=\"synthetic-implementations\" class=\"small-section-header\">\ + Auto Trait Implementations\ + <a href=\"#synthetic-implementations\" class=\"anchor\"></a>\ + </h2>\ + <div id=\"synthetic-implementations-list\">", + ); + render_impls(cx, w, &synthetic, containing_item, false); + w.write_str("</div>"); + } + + if !blanket_impl.is_empty() { + w.write_str( + "<h2 id=\"blanket-implementations\" class=\"small-section-header\">\ + Blanket Implementations\ + <a href=\"#blanket-implementations\" class=\"anchor\"></a>\ + </h2>\ + <div id=\"blanket-implementations-list\">", + ); + render_impls(cx, w, &blanket_impl, containing_item, false); + w.write_str("</div>"); + } + } +} + +fn render_deref_methods( + w: &mut Buffer, + cx: &mut Context<'_>, + impl_: &Impl, + container_item: &clean::Item, + deref_mut: bool, + derefs: &mut FxHashSet<DefId>, +) { + let cache = cx.cache(); + let deref_type = impl_.inner_impl().trait_.as_ref().unwrap(); + let (target, real_target) = impl_ + .inner_impl() + .items + .iter() + .find_map(|item| match *item.kind { + clean::AssocTypeItem(box ref t, _) => Some(match *t { + clean::Typedef { item_type: Some(ref type_), .. } => (type_, &t.type_), + _ => (&t.type_, &t.type_), + }), + _ => None, + }) + .expect("Expected associated type binding"); + debug!("Render deref methods for {:#?}, target {:#?}", impl_.inner_impl().for_, target); + let what = + AssocItemRender::DerefFor { trait_: deref_type, type_: real_target, deref_mut_: deref_mut }; + if let Some(did) = target.def_id(cache) { + if let Some(type_did) = impl_.inner_impl().for_.def_id(cache) { + // `impl Deref<Target = S> for S` + if did == type_did || !derefs.insert(did) { + // Avoid infinite cycles + return; + } + } + render_assoc_items_inner(w, cx, container_item, did, what, derefs); + } else if let Some(prim) = target.primitive_type() { + if let Some(&did) = cache.primitive_locations.get(&prim) { + render_assoc_items_inner(w, cx, container_item, did, what, derefs); + } + } +} + +fn should_render_item(item: &clean::Item, deref_mut_: bool, tcx: TyCtxt<'_>) -> bool { + let self_type_opt = match *item.kind { + clean::MethodItem(ref method, _) => method.decl.self_type(), + clean::TyMethodItem(ref method) => method.decl.self_type(), + _ => None, + }; + + if let Some(self_ty) = self_type_opt { + let (by_mut_ref, by_box, by_value) = match self_ty { + SelfTy::SelfBorrowed(_, mutability) + | SelfTy::SelfExplicit(clean::BorrowedRef { mutability, .. }) => { + (mutability == Mutability::Mut, false, false) + } + SelfTy::SelfExplicit(clean::Type::Path { path }) => { + (false, Some(path.def_id()) == tcx.lang_items().owned_box(), false) + } + SelfTy::SelfValue => (false, false, true), + _ => (false, false, false), + }; + + (deref_mut_ || !by_mut_ref) && !by_box && !by_value + } else { + false + } +} + +fn notable_traits_decl(decl: &clean::FnDecl, cx: &Context<'_>) -> String { + let mut out = Buffer::html(); + + if let Some((did, ty)) = decl.output.as_return().and_then(|t| Some((t.def_id(cx.cache())?, t))) + { + if let Some(impls) = cx.cache().impls.get(&did) { + for i in impls { + let impl_ = i.inner_impl(); + if !impl_.for_.without_borrowed_ref().is_same(ty.without_borrowed_ref(), cx.cache()) + { + // Two different types might have the same did, + // without actually being the same. + continue; + } + if let Some(trait_) = &impl_.trait_ { + let trait_did = trait_.def_id(); + + if cx.cache().traits.get(&trait_did).map_or(false, |t| t.is_notable) { + if out.is_empty() { + write!( + &mut out, + "<span class=\"notable\">Notable traits for {}</span>\ + <code class=\"content\">", + impl_.for_.print(cx) + ); + } + + //use the "where" class here to make it small + write!( + &mut out, + "<span class=\"where fmt-newline\">{}</span>", + impl_.print(false, cx) + ); + for it in &impl_.items { + if let clean::AssocTypeItem(ref tydef, ref _bounds) = *it.kind { + out.push_str("<span class=\"where fmt-newline\"> "); + let empty_set = FxHashSet::default(); + let src_link = + AssocItemLink::GotoSource(trait_did.into(), &empty_set); + assoc_type( + &mut out, + it, + &tydef.generics, + &[], // intentionally leaving out bounds + Some(&tydef.type_), + src_link, + 0, + cx, + ); + out.push_str(";</span>"); + } + } + } + } + } + } + } + + if !out.is_empty() { + out.insert_str( + 0, + "<span class=\"notable-traits\"><span class=\"notable-traits-tooltip\">ⓘ\ + <span class=\"notable-traits-tooltiptext\"><span class=\"docblock\">", + ); + out.push_str("</code></span></span></span></span>"); + } + + out.into_inner() +} + +#[derive(Clone, Copy, Debug)] +struct ImplRenderingParameters { + show_def_docs: bool, + show_default_items: bool, + /// Whether or not to show methods. + show_non_assoc_items: bool, + toggle_open_by_default: bool, +} + +fn render_impl( + w: &mut Buffer, + cx: &mut Context<'_>, + i: &Impl, + parent: &clean::Item, + link: AssocItemLink<'_>, + render_mode: RenderMode, + use_absolute: Option<bool>, + aliases: &[String], + rendering_params: ImplRenderingParameters, +) { + let shared = Rc::clone(&cx.shared); + let cache = &shared.cache; + let traits = &cache.traits; + let trait_ = i.trait_did().map(|did| &traits[&did]); + let mut close_tags = String::new(); + + // For trait implementations, the `interesting` output contains all methods that have doc + // comments, and the `boring` output contains all methods that do not. The distinction is + // used to allow hiding the boring methods. + // `containing_item` is used for rendering stability info. If the parent is a trait impl, + // `containing_item` will the grandparent, since trait impls can't have stability attached. + fn doc_impl_item( + boring: &mut Buffer, + interesting: &mut Buffer, + cx: &mut Context<'_>, + item: &clean::Item, + parent: &clean::Item, + containing_item: &clean::Item, + link: AssocItemLink<'_>, + render_mode: RenderMode, + is_default_item: bool, + trait_: Option<&clean::Trait>, + rendering_params: ImplRenderingParameters, + ) { + let item_type = item.type_(); + let name = item.name.as_ref().unwrap(); + + let render_method_item = rendering_params.show_non_assoc_items + && match render_mode { + RenderMode::Normal => true, + RenderMode::ForDeref { mut_: deref_mut_ } => { + should_render_item(item, deref_mut_, cx.tcx()) + } + }; + + let in_trait_class = if trait_.is_some() { " trait-impl" } else { "" }; + + let mut doc_buffer = Buffer::empty_from(boring); + let mut info_buffer = Buffer::empty_from(boring); + let mut short_documented = true; + + if render_method_item { + if !is_default_item { + if let Some(t) = trait_ { + // The trait item may have been stripped so we might not + // find any documentation or stability for it. + if let Some(it) = t.items.iter().find(|i| i.name == item.name) { + // We need the stability of the item from the trait + // because impls can't have a stability. + if item.doc_value().is_some() { + document_item_info(&mut info_buffer, cx, it, Some(parent)); + document_full(&mut doc_buffer, item, cx, HeadingOffset::H5); + short_documented = false; + } else { + // In case the item isn't documented, + // provide short documentation from the trait. + document_short( + &mut doc_buffer, + it, + cx, + link, + parent, + rendering_params.show_def_docs, + ); + } + } + } else { + document_item_info(&mut info_buffer, cx, item, Some(parent)); + if rendering_params.show_def_docs { + document_full(&mut doc_buffer, item, cx, HeadingOffset::H5); + short_documented = false; + } + } + } else { + document_short( + &mut doc_buffer, + item, + cx, + link, + parent, + rendering_params.show_def_docs, + ); + } + } + let w = if short_documented && trait_.is_some() { interesting } else { boring }; + + let toggled = !doc_buffer.is_empty(); + if toggled { + let method_toggle_class = + if item_type == ItemType::Method { " method-toggle" } else { "" }; + write!(w, "<details class=\"rustdoc-toggle{}\" open><summary>", method_toggle_class); + } + match &*item.kind { + clean::MethodItem(..) | clean::TyMethodItem(_) => { + // Only render when the method is not static or we allow static methods + if render_method_item { + let id = cx.derive_id(format!("{}.{}", item_type, name)); + let source_id = trait_ + .and_then(|trait_| { + trait_.items.iter().find(|item| { + item.name.map(|n| n.as_str().eq(name.as_str())).unwrap_or(false) + }) + }) + .map(|item| format!("{}.{}", item.type_(), name)); + write!( + w, + "<section id=\"{}\" class=\"{}{} has-srclink\">", + id, item_type, in_trait_class, + ); + render_rightside(w, cx, item, containing_item, render_mode); + if trait_.is_some() { + // Anchors are only used on trait impls. + write!(w, "<a href=\"#{}\" class=\"anchor\"></a>", id); + } + w.write_str("<h4 class=\"code-header\">"); + render_assoc_item( + w, + item, + link.anchor(source_id.as_ref().unwrap_or(&id)), + ItemType::Impl, + cx, + render_mode, + ); + w.write_str("</h4>"); + w.write_str("</section>"); + } + } + kind @ (clean::TyAssocConstItem(ty) | clean::AssocConstItem(ty, _)) => { + let source_id = format!("{}.{}", item_type, name); + let id = cx.derive_id(source_id.clone()); + write!( + w, + "<section id=\"{}\" class=\"{}{} has-srclink\">", + id, item_type, in_trait_class + ); + render_rightside(w, cx, item, containing_item, render_mode); + if trait_.is_some() { + // Anchors are only used on trait impls. + write!(w, "<a href=\"#{}\" class=\"anchor\"></a>", id); + } + w.write_str("<h4 class=\"code-header\">"); + assoc_const( + w, + item, + ty, + match kind { + clean::TyAssocConstItem(_) => None, + clean::AssocConstItem(_, default) => Some(default), + _ => unreachable!(), + }, + link.anchor(if trait_.is_some() { &source_id } else { &id }), + "", + cx, + ); + w.write_str("</h4>"); + w.write_str("</section>"); + } + clean::TyAssocTypeItem(generics, bounds) => { + let source_id = format!("{}.{}", item_type, name); + let id = cx.derive_id(source_id.clone()); + write!(w, "<section id=\"{}\" class=\"{}{}\">", id, item_type, in_trait_class); + if trait_.is_some() { + // Anchors are only used on trait impls. + write!(w, "<a href=\"#{}\" class=\"anchor\"></a>", id); + } + w.write_str("<h4 class=\"code-header\">"); + assoc_type( + w, + item, + generics, + bounds, + None, + link.anchor(if trait_.is_some() { &source_id } else { &id }), + 0, + cx, + ); + w.write_str("</h4>"); + w.write_str("</section>"); + } + clean::AssocTypeItem(tydef, _bounds) => { + let source_id = format!("{}.{}", item_type, name); + let id = cx.derive_id(source_id.clone()); + write!( + w, + "<section id=\"{}\" class=\"{}{} has-srclink\">", + id, item_type, in_trait_class + ); + if trait_.is_some() { + // Anchors are only used on trait impls. + write!(w, "<a href=\"#{}\" class=\"anchor\"></a>", id); + } + w.write_str("<h4 class=\"code-header\">"); + assoc_type( + w, + item, + &tydef.generics, + &[], // intentionally leaving out bounds + Some(tydef.item_type.as_ref().unwrap_or(&tydef.type_)), + link.anchor(if trait_.is_some() { &source_id } else { &id }), + 0, + cx, + ); + w.write_str("</h4>"); + w.write_str("</section>"); + } + clean::StrippedItem(..) => return, + _ => panic!("can't make docs for trait item with name {:?}", item.name), + } + + w.push_buffer(info_buffer); + if toggled { + w.write_str("</summary>"); + w.push_buffer(doc_buffer); + w.push_str("</details>"); + } + } + + let mut impl_items = Buffer::empty_from(w); + let mut default_impl_items = Buffer::empty_from(w); + + for trait_item in &i.inner_impl().items { + doc_impl_item( + &mut default_impl_items, + &mut impl_items, + cx, + trait_item, + if trait_.is_some() { &i.impl_item } else { parent }, + parent, + link, + render_mode, + false, + trait_.map(|t| &t.trait_), + rendering_params, + ); + } + + fn render_default_items( + boring: &mut Buffer, + interesting: &mut Buffer, + cx: &mut Context<'_>, + t: &clean::Trait, + i: &clean::Impl, + parent: &clean::Item, + containing_item: &clean::Item, + render_mode: RenderMode, + rendering_params: ImplRenderingParameters, + ) { + for trait_item in &t.items { + let n = trait_item.name; + if i.items.iter().any(|m| m.name == n) { + continue; + } + let did = i.trait_.as_ref().unwrap().def_id(); + let provided_methods = i.provided_trait_methods(cx.tcx()); + let assoc_link = AssocItemLink::GotoSource(did.into(), &provided_methods); + + doc_impl_item( + boring, + interesting, + cx, + trait_item, + parent, + containing_item, + assoc_link, + render_mode, + true, + Some(t), + rendering_params, + ); + } + } + + // If we've implemented a trait, then also emit documentation for all + // default items which weren't overridden in the implementation block. + // We don't emit documentation for default items if they appear in the + // Implementations on Foreign Types or Implementors sections. + if rendering_params.show_default_items { + if let Some(t) = trait_ { + render_default_items( + &mut default_impl_items, + &mut impl_items, + cx, + &t.trait_, + i.inner_impl(), + &i.impl_item, + parent, + render_mode, + rendering_params, + ); + } + } + if render_mode == RenderMode::Normal { + let toggled = !(impl_items.is_empty() && default_impl_items.is_empty()); + if toggled { + close_tags.insert_str(0, "</details>"); + write!( + w, + "<details class=\"rustdoc-toggle implementors-toggle\"{}>", + if rendering_params.toggle_open_by_default { " open" } else { "" } + ); + write!(w, "<summary>") + } + render_impl_summary( + w, + cx, + i, + parent, + parent, + rendering_params.show_def_docs, + use_absolute, + aliases, + ); + if toggled { + write!(w, "</summary>") + } + + if let Some(ref dox) = i.impl_item.collapsed_doc_value() { + if trait_.is_none() && i.inner_impl().items.is_empty() { + w.write_str( + "<div class=\"item-info\">\ + <div class=\"stab empty-impl\">This impl block contains no items.</div> + </div>", + ); + } + write!( + w, + "<div class=\"docblock\">{}</div>", + Markdown { + content: &*dox, + links: &i.impl_item.links(cx), + ids: &mut cx.id_map, + error_codes: cx.shared.codes, + edition: cx.shared.edition(), + playground: &cx.shared.playground, + heading_offset: HeadingOffset::H4 + } + .into_string() + ); + } + } + if !default_impl_items.is_empty() || !impl_items.is_empty() { + w.write_str("<div class=\"impl-items\">"); + w.push_buffer(default_impl_items); + w.push_buffer(impl_items); + close_tags.insert_str(0, "</div>"); + } + w.write_str(&close_tags); +} + +// Render the items that appear on the right side of methods, impls, and +// associated types. For example "1.0.0 (const: 1.39.0) · source". +fn render_rightside( + w: &mut Buffer, + cx: &Context<'_>, + item: &clean::Item, + containing_item: &clean::Item, + render_mode: RenderMode, +) { + let tcx = cx.tcx(); + + // FIXME: Once https://github.com/rust-lang/rust/issues/67792 is implemented, we can remove + // this condition. + let (const_stability, const_stable_since) = match render_mode { + RenderMode::Normal => (item.const_stability(tcx), containing_item.const_stable_since(tcx)), + RenderMode::ForDeref { .. } => (None, None), + }; + + let mut rightside = Buffer::new(); + let has_stability = render_stability_since_raw( + &mut rightside, + item.stable_since(tcx), + const_stability, + containing_item.stable_since(tcx), + const_stable_since, + ); + let mut srclink = Buffer::empty_from(w); + write_srclink(cx, item, &mut srclink); + if has_stability && !srclink.is_empty() { + rightside.write_str(" · "); + } + rightside.push_buffer(srclink); + if !rightside.is_empty() { + write!(w, "<span class=\"rightside\">{}</span>", rightside.into_inner()); + } +} + +pub(crate) fn render_impl_summary( + w: &mut Buffer, + cx: &mut Context<'_>, + i: &Impl, + parent: &clean::Item, + containing_item: &clean::Item, + show_def_docs: bool, + use_absolute: Option<bool>, + // This argument is used to reference same type with different paths to avoid duplication + // in documentation pages for trait with automatic implementations like "Send" and "Sync". + aliases: &[String], +) { + let id = + cx.derive_id(get_id_for_impl(&i.inner_impl().for_, i.inner_impl().trait_.as_ref(), cx)); + let aliases = if aliases.is_empty() { + String::new() + } else { + format!(" data-aliases=\"{}\"", aliases.join(",")) + }; + write!(w, "<section id=\"{}\" class=\"impl has-srclink\"{}>", id, aliases); + render_rightside(w, cx, &i.impl_item, containing_item, RenderMode::Normal); + write!(w, "<a href=\"#{}\" class=\"anchor\"></a>", id); + write!(w, "<h3 class=\"code-header in-band\">"); + + if let Some(use_absolute) = use_absolute { + write!(w, "{}", i.inner_impl().print(use_absolute, cx)); + if show_def_docs { + for it in &i.inner_impl().items { + if let clean::AssocTypeItem(ref tydef, ref _bounds) = *it.kind { + w.write_str("<span class=\"where fmt-newline\"> "); + assoc_type( + w, + it, + &tydef.generics, + &[], // intentionally leaving out bounds + Some(&tydef.type_), + AssocItemLink::Anchor(None), + 0, + cx, + ); + w.write_str(";</span>"); + } + } + } + } else { + write!(w, "{}", i.inner_impl().print(false, cx)); + } + write!(w, "</h3>"); + + let is_trait = i.inner_impl().trait_.is_some(); + if is_trait { + if let Some(portability) = portability(&i.impl_item, Some(parent)) { + write!(w, "<span class=\"item-info\">{}</span>", portability); + } + } + + w.write_str("</section>"); +} + +fn print_sidebar(cx: &Context<'_>, it: &clean::Item, buffer: &mut Buffer) { + if it.is_struct() + || it.is_trait() + || it.is_primitive() + || it.is_union() + || it.is_enum() + || it.is_mod() + || it.is_typedef() + { + write!( + buffer, + "<h2 class=\"location\"><a href=\"#\">{}{}</a></h2>", + match *it.kind { + clean::ModuleItem(..) => + if it.is_crate() { + "Crate " + } else { + "Module " + }, + _ => "", + }, + it.name.as_ref().unwrap() + ); + } + + buffer.write_str("<div class=\"sidebar-elems\">"); + if it.is_crate() { + write!(buffer, "<div class=\"block\"><ul>"); + if let Some(ref version) = cx.cache().crate_version { + write!(buffer, "<li class=\"version\">Version {}</li>", Escape(version)); + } + write!(buffer, "<li><a id=\"all-types\" href=\"all.html\">All Items</a></li>"); + buffer.write_str("</ul></div>"); + } + + match *it.kind { + clean::StructItem(ref s) => sidebar_struct(cx, buffer, it, s), + clean::TraitItem(ref t) => sidebar_trait(cx, buffer, it, t), + clean::PrimitiveItem(_) => sidebar_primitive(cx, buffer, it), + clean::UnionItem(ref u) => sidebar_union(cx, buffer, it, u), + clean::EnumItem(ref e) => sidebar_enum(cx, buffer, it, e), + clean::TypedefItem(_) => sidebar_typedef(cx, buffer, it), + clean::ModuleItem(ref m) => sidebar_module(buffer, &m.items), + clean::ForeignTypeItem => sidebar_foreign_type(cx, buffer, it), + _ => {} + } + + // The sidebar is designed to display sibling functions, modules and + // other miscellaneous information. since there are lots of sibling + // items (and that causes quadratic growth in large modules), + // we refactor common parts into a shared JavaScript file per module. + // still, we don't move everything into JS because we want to preserve + // as much HTML as possible in order to allow non-JS-enabled browsers + // to navigate the documentation (though slightly inefficiently). + + if !it.is_mod() { + let path: String = cx.current.iter().map(|s| s.as_str()).intersperse("::").collect(); + + write!(buffer, "<h2 class=\"location\"><a href=\"index.html\">In {}</a></h2>", path); + } + + // Closes sidebar-elems div. + buffer.write_str("</div>"); +} + +fn get_next_url(used_links: &mut FxHashSet<String>, url: String) -> String { + if used_links.insert(url.clone()) { + return url; + } + let mut add = 1; + while !used_links.insert(format!("{}-{}", url, add)) { + add += 1; + } + format!("{}-{}", url, add) +} + +struct SidebarLink { + name: Symbol, + url: String, +} + +impl fmt::Display for SidebarLink { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "<a href=\"#{}\">{}</a>", self.url, self.name) + } +} + +impl PartialEq for SidebarLink { + fn eq(&self, other: &Self) -> bool { + self.url == other.url + } +} + +impl Eq for SidebarLink {} + +impl PartialOrd for SidebarLink { + fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> { + Some(self.cmp(other)) + } +} + +impl Ord for SidebarLink { + fn cmp(&self, other: &Self) -> std::cmp::Ordering { + self.url.cmp(&other.url) + } +} + +fn get_methods( + i: &clean::Impl, + for_deref: bool, + used_links: &mut FxHashSet<String>, + deref_mut: bool, + tcx: TyCtxt<'_>, +) -> Vec<SidebarLink> { + i.items + .iter() + .filter_map(|item| match item.name { + Some(name) if !name.is_empty() && item.is_method() => { + if !for_deref || should_render_item(item, deref_mut, tcx) { + Some(SidebarLink { + name, + url: get_next_url(used_links, format!("{}.{}", ItemType::Method, name)), + }) + } else { + None + } + } + _ => None, + }) + .collect::<Vec<_>>() +} + +fn get_associated_constants( + i: &clean::Impl, + used_links: &mut FxHashSet<String>, +) -> Vec<SidebarLink> { + i.items + .iter() + .filter_map(|item| match item.name { + Some(name) if !name.is_empty() && item.is_associated_const() => Some(SidebarLink { + name, + url: get_next_url(used_links, format!("{}.{}", ItemType::AssocConst, name)), + }), + _ => None, + }) + .collect::<Vec<_>>() +} + +// The point is to url encode any potential character from a type with genericity. +fn small_url_encode(s: String) -> String { + let mut st = String::new(); + let mut last_match = 0; + for (idx, c) in s.char_indices() { + let escaped = match c { + '<' => "%3C", + '>' => "%3E", + ' ' => "%20", + '?' => "%3F", + '\'' => "%27", + '&' => "%26", + ',' => "%2C", + ':' => "%3A", + ';' => "%3B", + '[' => "%5B", + ']' => "%5D", + '"' => "%22", + _ => continue, + }; + + st += &s[last_match..idx]; + st += escaped; + // NOTE: we only expect single byte characters here - which is fine as long as we + // only match single byte characters + last_match = idx + 1; + } + + if last_match != 0 { + st += &s[last_match..]; + st + } else { + s + } +} + +fn sidebar_assoc_items(cx: &Context<'_>, out: &mut Buffer, it: &clean::Item) { + let did = it.item_id.expect_def_id(); + let cache = cx.cache(); + + if let Some(v) = cache.impls.get(&did) { + let mut used_links = FxHashSet::default(); + let mut id_map = IdMap::new(); + + { + let used_links_bor = &mut used_links; + let mut assoc_consts = v + .iter() + .filter(|i| i.inner_impl().trait_.is_none()) + .flat_map(|i| get_associated_constants(i.inner_impl(), used_links_bor)) + .collect::<Vec<_>>(); + if !assoc_consts.is_empty() { + // We want links' order to be reproducible so we don't use unstable sort. + assoc_consts.sort(); + + print_sidebar_block( + out, + "implementations", + "Associated Constants", + assoc_consts.iter(), + ); + } + let mut methods = v + .iter() + .filter(|i| i.inner_impl().trait_.is_none()) + .flat_map(|i| get_methods(i.inner_impl(), false, used_links_bor, false, cx.tcx())) + .collect::<Vec<_>>(); + if !methods.is_empty() { + // We want links' order to be reproducible so we don't use unstable sort. + methods.sort(); + + print_sidebar_block(out, "implementations", "Methods", methods.iter()); + } + } + + if v.iter().any(|i| i.inner_impl().trait_.is_some()) { + if let Some(impl_) = + v.iter().find(|i| i.trait_did() == cx.tcx().lang_items().deref_trait()) + { + let mut derefs = FxHashSet::default(); + derefs.insert(did); + sidebar_deref_methods(cx, out, impl_, v, &mut derefs); + } + + let format_impls = |impls: Vec<&Impl>, id_map: &mut IdMap| { + let mut links = FxHashSet::default(); + + let mut ret = impls + .iter() + .filter_map(|it| { + let trait_ = it.inner_impl().trait_.as_ref()?; + let encoded = + id_map.derive(get_id_for_impl(&it.inner_impl().for_, Some(trait_), cx)); + + let i_display = format!("{:#}", trait_.print(cx)); + let out = Escape(&i_display); + let prefix = match it.inner_impl().polarity { + ty::ImplPolarity::Positive | ty::ImplPolarity::Reservation => "", + ty::ImplPolarity::Negative => "!", + }; + let generated = format!("<a href=\"#{}\">{}{}</a>", encoded, prefix, out); + if links.insert(generated.clone()) { Some(generated) } else { None } + }) + .collect::<Vec<String>>(); + ret.sort(); + ret + }; + + let (synthetic, concrete): (Vec<&Impl>, Vec<&Impl>) = + v.iter().partition::<Vec<_>, _>(|i| i.inner_impl().kind.is_auto()); + let (blanket_impl, concrete): (Vec<&Impl>, Vec<&Impl>) = + concrete.into_iter().partition::<Vec<_>, _>(|i| i.inner_impl().kind.is_blanket()); + + let concrete_format = format_impls(concrete, &mut id_map); + let synthetic_format = format_impls(synthetic, &mut id_map); + let blanket_format = format_impls(blanket_impl, &mut id_map); + + if !concrete_format.is_empty() { + print_sidebar_block( + out, + "trait-implementations", + "Trait Implementations", + concrete_format.iter(), + ); + } + + if !synthetic_format.is_empty() { + print_sidebar_block( + out, + "synthetic-implementations", + "Auto Trait Implementations", + synthetic_format.iter(), + ); + } + + if !blanket_format.is_empty() { + print_sidebar_block( + out, + "blanket-implementations", + "Blanket Implementations", + blanket_format.iter(), + ); + } + } + } +} + +fn sidebar_deref_methods( + cx: &Context<'_>, + out: &mut Buffer, + impl_: &Impl, + v: &[Impl], + derefs: &mut FxHashSet<DefId>, +) { + let c = cx.cache(); + + debug!("found Deref: {:?}", impl_); + if let Some((target, real_target)) = + impl_.inner_impl().items.iter().find_map(|item| match *item.kind { + clean::AssocTypeItem(box ref t, _) => Some(match *t { + clean::Typedef { item_type: Some(ref type_), .. } => (type_, &t.type_), + _ => (&t.type_, &t.type_), + }), + _ => None, + }) + { + debug!("found target, real_target: {:?} {:?}", target, real_target); + if let Some(did) = target.def_id(c) { + if let Some(type_did) = impl_.inner_impl().for_.def_id(c) { + // `impl Deref<Target = S> for S` + if did == type_did || !derefs.insert(did) { + // Avoid infinite cycles + return; + } + } + } + let deref_mut = v.iter().any(|i| i.trait_did() == cx.tcx().lang_items().deref_mut_trait()); + let inner_impl = target + .def_id(c) + .or_else(|| { + target.primitive_type().and_then(|prim| c.primitive_locations.get(&prim).cloned()) + }) + .and_then(|did| c.impls.get(&did)); + if let Some(impls) = inner_impl { + debug!("found inner_impl: {:?}", impls); + let mut used_links = FxHashSet::default(); + let mut ret = impls + .iter() + .filter(|i| i.inner_impl().trait_.is_none()) + .flat_map(|i| { + get_methods(i.inner_impl(), true, &mut used_links, deref_mut, cx.tcx()) + }) + .collect::<Vec<_>>(); + if !ret.is_empty() { + let id = if let Some(target_def_id) = real_target.def_id(c) { + cx.deref_id_map.get(&target_def_id).expect("Deref section without derived id") + } else { + "deref-methods" + }; + let title = format!( + "Methods from {}<Target={}>", + Escape(&format!("{:#}", impl_.inner_impl().trait_.as_ref().unwrap().print(cx))), + Escape(&format!("{:#}", real_target.print(cx))), + ); + // We want links' order to be reproducible so we don't use unstable sort. + ret.sort(); + print_sidebar_block(out, id, &title, ret.iter()); + } + } + + // Recurse into any further impls that might exist for `target` + if let Some(target_did) = target.def_id(c) { + if let Some(target_impls) = c.impls.get(&target_did) { + if let Some(target_deref_impl) = target_impls.iter().find(|i| { + i.inner_impl() + .trait_ + .as_ref() + .map(|t| Some(t.def_id()) == cx.tcx().lang_items().deref_trait()) + .unwrap_or(false) + }) { + sidebar_deref_methods(cx, out, target_deref_impl, target_impls, derefs); + } + } + } + } +} + +fn sidebar_struct(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item, s: &clean::Struct) { + let mut sidebar = Buffer::new(); + let fields = get_struct_fields_name(&s.fields); + + if !fields.is_empty() { + match s.struct_type { + CtorKind::Fictive => { + print_sidebar_block(&mut sidebar, "fields", "Fields", fields.iter()); + } + CtorKind::Fn => print_sidebar_title(&mut sidebar, "fields", "Tuple Fields"), + CtorKind::Const => {} + } + } + + sidebar_assoc_items(cx, &mut sidebar, it); + + if !sidebar.is_empty() { + write!(buf, "<section>{}</section>", sidebar.into_inner()); + } +} + +fn get_id_for_impl(for_: &clean::Type, trait_: Option<&clean::Path>, cx: &Context<'_>) -> String { + match trait_ { + Some(t) => small_url_encode(format!("impl-{:#}-for-{:#}", t.print(cx), for_.print(cx))), + None => small_url_encode(format!("impl-{:#}", for_.print(cx))), + } +} + +fn extract_for_impl_name(item: &clean::Item, cx: &Context<'_>) -> Option<(String, String)> { + match *item.kind { + clean::ItemKind::ImplItem(ref i) => { + i.trait_.as_ref().map(|trait_| { + // Alternative format produces no URLs, + // so this parameter does nothing. + (format!("{:#}", i.for_.print(cx)), get_id_for_impl(&i.for_, Some(trait_), cx)) + }) + } + _ => None, + } +} + +/// Don't call this function directly!!! Use `print_sidebar_title` or `print_sidebar_block` instead! +fn print_sidebar_title_inner(buf: &mut Buffer, id: &str, title: &str) { + write!( + buf, + "<h3 class=\"sidebar-title\">\ + <a href=\"#{}\">{}</a>\ + </h3>", + id, title + ); +} + +fn print_sidebar_title(buf: &mut Buffer, id: &str, title: &str) { + buf.push_str("<div class=\"block\">"); + print_sidebar_title_inner(buf, id, title); + buf.push_str("</div>"); +} + +fn print_sidebar_block( + buf: &mut Buffer, + id: &str, + title: &str, + items: impl Iterator<Item = impl fmt::Display>, +) { + buf.push_str("<div class=\"block\">"); + print_sidebar_title_inner(buf, id, title); + buf.push_str("<ul>"); + for item in items { + write!(buf, "<li>{}</li>", item); + } + buf.push_str("</ul></div>"); +} + +fn sidebar_trait(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item, t: &clean::Trait) { + buf.write_str("<section>"); + + fn print_sidebar_section( + out: &mut Buffer, + items: &[clean::Item], + id: &str, + title: &str, + filter: impl Fn(&clean::Item) -> bool, + mapper: impl Fn(&str) -> String, + ) { + let mut items: Vec<&str> = items + .iter() + .filter_map(|m| match m.name { + Some(ref name) if filter(m) => Some(name.as_str()), + _ => None, + }) + .collect::<Vec<_>>(); + + if !items.is_empty() { + items.sort_unstable(); + print_sidebar_block(out, id, title, items.into_iter().map(mapper)); + } + } + + print_sidebar_section( + buf, + &t.items, + "required-associated-types", + "Required Associated Types", + |m| m.is_ty_associated_type(), + |sym| format!("<a href=\"#{1}.{0}\">{0}</a>", sym, ItemType::AssocType), + ); + + print_sidebar_section( + buf, + &t.items, + "provided-associated-types", + "Provided Associated Types", + |m| m.is_associated_type(), + |sym| format!("<a href=\"#{1}.{0}\">{0}</a>", sym, ItemType::AssocType), + ); + + print_sidebar_section( + buf, + &t.items, + "required-associated-consts", + "Required Associated Constants", + |m| m.is_ty_associated_const(), + |sym| format!("<a href=\"#{1}.{0}\">{0}</a>", sym, ItemType::AssocConst), + ); + + print_sidebar_section( + buf, + &t.items, + "provided-associated-consts", + "Provided Associated Constants", + |m| m.is_associated_const(), + |sym| format!("<a href=\"#{1}.{0}\">{0}</a>", sym, ItemType::AssocConst), + ); + + print_sidebar_section( + buf, + &t.items, + "required-methods", + "Required Methods", + |m| m.is_ty_method(), + |sym| format!("<a href=\"#{1}.{0}\">{0}</a>", sym, ItemType::TyMethod), + ); + + print_sidebar_section( + buf, + &t.items, + "provided-methods", + "Provided Methods", + |m| m.is_method(), + |sym| format!("<a href=\"#{1}.{0}\">{0}</a>", sym, ItemType::Method), + ); + + if let Some(implementors) = cx.cache().implementors.get(&it.item_id.expect_def_id()) { + let mut res = implementors + .iter() + .filter(|i| !i.is_on_local_type(cx)) + .filter_map(|i| extract_for_impl_name(&i.impl_item, cx)) + .collect::<Vec<_>>(); + + if !res.is_empty() { + res.sort(); + print_sidebar_block( + buf, + "foreign-impls", + "Implementations on Foreign Types", + res.iter().map(|(name, id)| format!("<a href=\"#{}\">{}</a>", id, Escape(name))), + ); + } + } + + sidebar_assoc_items(cx, buf, it); + + print_sidebar_title(buf, "implementors", "Implementors"); + if t.is_auto(cx.tcx()) { + print_sidebar_title(buf, "synthetic-implementors", "Auto Implementors"); + } + + buf.push_str("</section>") +} + +fn sidebar_primitive(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item) { + let mut sidebar = Buffer::new(); + sidebar_assoc_items(cx, &mut sidebar, it); + + if !sidebar.is_empty() { + write!(buf, "<section>{}</section>", sidebar.into_inner()); + } +} + +fn sidebar_typedef(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item) { + let mut sidebar = Buffer::new(); + sidebar_assoc_items(cx, &mut sidebar, it); + + if !sidebar.is_empty() { + write!(buf, "<section>{}</section>", sidebar.into_inner()); + } +} + +fn get_struct_fields_name(fields: &[clean::Item]) -> Vec<String> { + let mut fields = fields + .iter() + .filter(|f| matches!(*f.kind, clean::StructFieldItem(..))) + .filter_map(|f| { + f.name.map(|name| format!("<a href=\"#structfield.{name}\">{name}</a>", name = name)) + }) + .collect::<Vec<_>>(); + fields.sort(); + fields +} + +fn sidebar_union(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item, u: &clean::Union) { + let mut sidebar = Buffer::new(); + let fields = get_struct_fields_name(&u.fields); + + if !fields.is_empty() { + print_sidebar_block(&mut sidebar, "fields", "Fields", fields.iter()); + } + + sidebar_assoc_items(cx, &mut sidebar, it); + + if !sidebar.is_empty() { + write!(buf, "<section>{}</section>", sidebar.into_inner()); + } +} + +fn sidebar_enum(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item, e: &clean::Enum) { + let mut sidebar = Buffer::new(); + + let mut variants = e + .variants() + .filter_map(|v| { + v.name + .as_ref() + .map(|name| format!("<a href=\"#variant.{name}\">{name}</a>", name = name)) + }) + .collect::<Vec<_>>(); + if !variants.is_empty() { + variants.sort_unstable(); + print_sidebar_block(&mut sidebar, "variants", "Variants", variants.iter()); + } + + sidebar_assoc_items(cx, &mut sidebar, it); + + if !sidebar.is_empty() { + write!(buf, "<section>{}</section>", sidebar.into_inner()); + } +} + +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +enum ItemSection { + Reexports, + PrimitiveTypes, + Modules, + Macros, + Structs, + Enums, + Constants, + Statics, + Traits, + Functions, + TypeDefinitions, + Unions, + Implementations, + TypeMethods, + Methods, + StructFields, + Variants, + AssociatedTypes, + AssociatedConstants, + ForeignTypes, + Keywords, + OpaqueTypes, + AttributeMacros, + DeriveMacros, + TraitAliases, +} + +impl ItemSection { + const ALL: &'static [Self] = { + use ItemSection::*; + // NOTE: The order here affects the order in the UI. + &[ + Reexports, + PrimitiveTypes, + Modules, + Macros, + Structs, + Enums, + Constants, + Statics, + Traits, + Functions, + TypeDefinitions, + Unions, + Implementations, + TypeMethods, + Methods, + StructFields, + Variants, + AssociatedTypes, + AssociatedConstants, + ForeignTypes, + Keywords, + OpaqueTypes, + AttributeMacros, + DeriveMacros, + TraitAliases, + ] + }; + + fn id(self) -> &'static str { + match self { + Self::Reexports => "reexports", + Self::Modules => "modules", + Self::Structs => "structs", + Self::Unions => "unions", + Self::Enums => "enums", + Self::Functions => "functions", + Self::TypeDefinitions => "types", + Self::Statics => "statics", + Self::Constants => "constants", + Self::Traits => "traits", + Self::Implementations => "impls", + Self::TypeMethods => "tymethods", + Self::Methods => "methods", + Self::StructFields => "fields", + Self::Variants => "variants", + Self::Macros => "macros", + Self::PrimitiveTypes => "primitives", + Self::AssociatedTypes => "associated-types", + Self::AssociatedConstants => "associated-consts", + Self::ForeignTypes => "foreign-types", + Self::Keywords => "keywords", + Self::OpaqueTypes => "opaque-types", + Self::AttributeMacros => "attributes", + Self::DeriveMacros => "derives", + Self::TraitAliases => "trait-aliases", + } + } + + fn name(self) -> &'static str { + match self { + Self::Reexports => "Re-exports", + Self::Modules => "Modules", + Self::Structs => "Structs", + Self::Unions => "Unions", + Self::Enums => "Enums", + Self::Functions => "Functions", + Self::TypeDefinitions => "Type Definitions", + Self::Statics => "Statics", + Self::Constants => "Constants", + Self::Traits => "Traits", + Self::Implementations => "Implementations", + Self::TypeMethods => "Type Methods", + Self::Methods => "Methods", + Self::StructFields => "Struct Fields", + Self::Variants => "Variants", + Self::Macros => "Macros", + Self::PrimitiveTypes => "Primitive Types", + Self::AssociatedTypes => "Associated Types", + Self::AssociatedConstants => "Associated Constants", + Self::ForeignTypes => "Foreign Types", + Self::Keywords => "Keywords", + Self::OpaqueTypes => "Opaque Types", + Self::AttributeMacros => "Attribute Macros", + Self::DeriveMacros => "Derive Macros", + Self::TraitAliases => "Trait Aliases", + } + } +} + +fn item_ty_to_section(ty: ItemType) -> ItemSection { + match ty { + ItemType::ExternCrate | ItemType::Import => ItemSection::Reexports, + ItemType::Module => ItemSection::Modules, + ItemType::Struct => ItemSection::Structs, + ItemType::Union => ItemSection::Unions, + ItemType::Enum => ItemSection::Enums, + ItemType::Function => ItemSection::Functions, + ItemType::Typedef => ItemSection::TypeDefinitions, + ItemType::Static => ItemSection::Statics, + ItemType::Constant => ItemSection::Constants, + ItemType::Trait => ItemSection::Traits, + ItemType::Impl => ItemSection::Implementations, + ItemType::TyMethod => ItemSection::TypeMethods, + ItemType::Method => ItemSection::Methods, + ItemType::StructField => ItemSection::StructFields, + ItemType::Variant => ItemSection::Variants, + ItemType::Macro => ItemSection::Macros, + ItemType::Primitive => ItemSection::PrimitiveTypes, + ItemType::AssocType => ItemSection::AssociatedTypes, + ItemType::AssocConst => ItemSection::AssociatedConstants, + ItemType::ForeignType => ItemSection::ForeignTypes, + ItemType::Keyword => ItemSection::Keywords, + ItemType::OpaqueTy => ItemSection::OpaqueTypes, + ItemType::ProcAttribute => ItemSection::AttributeMacros, + ItemType::ProcDerive => ItemSection::DeriveMacros, + ItemType::TraitAlias => ItemSection::TraitAliases, + } +} + +fn sidebar_module(buf: &mut Buffer, items: &[clean::Item]) { + use std::fmt::Write as _; + + let mut sidebar = String::new(); + + let item_sections_in_use: FxHashSet<_> = items + .iter() + .filter(|it| { + !it.is_stripped() + && it + .name + .or_else(|| { + if let clean::ImportItem(ref i) = *it.kind && + let clean::ImportKind::Simple(s) = i.kind { Some(s) } else { None } + }) + .is_some() + }) + .map(|it| item_ty_to_section(it.type_())) + .collect(); + for &sec in ItemSection::ALL.iter().filter(|sec| item_sections_in_use.contains(sec)) { + let _ = write!(sidebar, "<li><a href=\"#{}\">{}</a></li>", sec.id(), sec.name()); + } + + if !sidebar.is_empty() { + write!( + buf, + "<section>\ + <div class=\"block\">\ + <ul>{}</ul>\ + </div>\ + </section>", + sidebar + ); + } +} + +fn sidebar_foreign_type(cx: &Context<'_>, buf: &mut Buffer, it: &clean::Item) { + let mut sidebar = Buffer::new(); + sidebar_assoc_items(cx, &mut sidebar, it); + + if !sidebar.is_empty() { + write!(buf, "<section>{}</section>", sidebar.into_inner()); + } +} + +pub(crate) const BASIC_KEYWORDS: &str = "rust, rustlang, rust-lang"; + +/// Returns a list of all paths used in the type. +/// This is used to help deduplicate imported impls +/// for reexported types. If any of the contained +/// types are re-exported, we don't use the corresponding +/// entry from the js file, as inlining will have already +/// picked up the impl +fn collect_paths_for_type(first_ty: clean::Type, cache: &Cache) -> Vec<String> { + let mut out = Vec::new(); + let mut visited = FxHashSet::default(); + let mut work = VecDeque::new(); + + let mut process_path = |did: DefId| { + let get_extern = || cache.external_paths.get(&did).map(|s| s.0.clone()); + let fqp = cache.exact_paths.get(&did).cloned().or_else(get_extern); + + if let Some(path) = fqp { + out.push(join_with_double_colon(&path)); + } + }; + + work.push_back(first_ty); + + while let Some(ty) = work.pop_front() { + if !visited.insert(ty.clone()) { + continue; + } + + match ty { + clean::Type::Path { path } => process_path(path.def_id()), + clean::Type::Tuple(tys) => { + work.extend(tys.into_iter()); + } + clean::Type::Slice(ty) => { + work.push_back(*ty); + } + clean::Type::Array(ty, _) => { + work.push_back(*ty); + } + clean::Type::RawPointer(_, ty) => { + work.push_back(*ty); + } + clean::Type::BorrowedRef { type_, .. } => { + work.push_back(*type_); + } + clean::Type::QPath { self_type, trait_, .. } => { + work.push_back(*self_type); + process_path(trait_.def_id()); + } + _ => {} + } + } + out +} + +const MAX_FULL_EXAMPLES: usize = 5; +const NUM_VISIBLE_LINES: usize = 10; + +/// Generates the HTML for example call locations generated via the --scrape-examples flag. +fn render_call_locations(w: &mut Buffer, cx: &mut Context<'_>, item: &clean::Item) { + let tcx = cx.tcx(); + let def_id = item.item_id.expect_def_id(); + let key = tcx.def_path_hash(def_id); + let Some(call_locations) = cx.shared.call_locations.get(&key) else { return }; + + // Generate a unique ID so users can link to this section for a given method + let id = cx.id_map.derive("scraped-examples"); + write!( + w, + "<div class=\"docblock scraped-example-list\">\ + <span></span>\ + <h5 id=\"{id}\">\ + <a href=\"#{id}\">Examples found in repository</a>\ + <a class=\"scrape-help\" href=\"{root_path}scrape-examples-help.html\">?</a>\ + </h5>", + root_path = cx.root_path(), + id = id + ); + + // Create a URL to a particular location in a reverse-dependency's source file + let link_to_loc = |call_data: &CallData, loc: &CallLocation| -> (String, String) { + let (line_lo, line_hi) = loc.call_expr.line_span; + let (anchor, title) = if line_lo == line_hi { + ((line_lo + 1).to_string(), format!("line {}", line_lo + 1)) + } else { + ( + format!("{}-{}", line_lo + 1, line_hi + 1), + format!("lines {}-{}", line_lo + 1, line_hi + 1), + ) + }; + let url = format!("{}{}#{}", cx.root_path(), call_data.url, anchor); + (url, title) + }; + + // Generate the HTML for a single example, being the title and code block + let write_example = |w: &mut Buffer, (path, call_data): (&PathBuf, &CallData)| -> bool { + let contents = match fs::read_to_string(&path) { + Ok(contents) => contents, + Err(err) => { + let span = item.span(tcx).inner(); + tcx.sess + .span_err(span, &format!("failed to read file {}: {}", path.display(), err)); + return false; + } + }; + + // To reduce file sizes, we only want to embed the source code needed to understand the example, not + // the entire file. So we find the smallest byte range that covers all items enclosing examples. + assert!(!call_data.locations.is_empty()); + let min_loc = + call_data.locations.iter().min_by_key(|loc| loc.enclosing_item.byte_span.0).unwrap(); + let byte_min = min_loc.enclosing_item.byte_span.0; + let line_min = min_loc.enclosing_item.line_span.0; + let max_loc = + call_data.locations.iter().max_by_key(|loc| loc.enclosing_item.byte_span.1).unwrap(); + let byte_max = max_loc.enclosing_item.byte_span.1; + let line_max = max_loc.enclosing_item.line_span.1; + + // The output code is limited to that byte range. + let contents_subset = &contents[(byte_min as usize)..(byte_max as usize)]; + + // The call locations need to be updated to reflect that the size of the program has changed. + // Specifically, the ranges are all subtracted by `byte_min` since that's the new zero point. + let (mut byte_ranges, line_ranges): (Vec<_>, Vec<_>) = call_data + .locations + .iter() + .map(|loc| { + let (byte_lo, byte_hi) = loc.call_ident.byte_span; + let (line_lo, line_hi) = loc.call_expr.line_span; + let byte_range = (byte_lo - byte_min, byte_hi - byte_min); + + let line_range = (line_lo - line_min, line_hi - line_min); + let (line_url, line_title) = link_to_loc(call_data, loc); + + (byte_range, (line_range, line_url, line_title)) + }) + .unzip(); + + let (_, init_url, init_title) = &line_ranges[0]; + let needs_expansion = line_max - line_min > NUM_VISIBLE_LINES; + let locations_encoded = serde_json::to_string(&line_ranges).unwrap(); + + write!( + w, + "<div class=\"scraped-example {expanded_cls}\" data-locs=\"{locations}\">\ + <div class=\"scraped-example-title\">\ + {name} (<a href=\"{url}\">{title}</a>)\ + </div>\ + <div class=\"code-wrapper\">", + expanded_cls = if needs_expansion { "" } else { "expanded" }, + name = call_data.display_name, + url = init_url, + title = init_title, + // The locations are encoded as a data attribute, so they can be read + // later by the JS for interactions. + locations = Escape(&locations_encoded) + ); + + if line_ranges.len() > 1 { + write!(w, r#"<span class="prev">≺</span> <span class="next">≻</span>"#); + } + + if needs_expansion { + write!(w, r#"<span class="expand">↕</span>"#); + } + + // Look for the example file in the source map if it exists, otherwise return a dummy span + let file_span = (|| { + let source_map = tcx.sess.source_map(); + let crate_src = tcx.sess.local_crate_source_file.as_ref()?; + let abs_crate_src = crate_src.canonicalize().ok()?; + let crate_root = abs_crate_src.parent()?.parent()?; + let rel_path = path.strip_prefix(crate_root).ok()?; + let files = source_map.files(); + let file = files.iter().find(|file| match &file.name { + FileName::Real(RealFileName::LocalPath(other_path)) => rel_path == other_path, + _ => false, + })?; + Some(rustc_span::Span::with_root_ctxt( + file.start_pos + BytePos(byte_min), + file.start_pos + BytePos(byte_max), + )) + })() + .unwrap_or(rustc_span::DUMMY_SP); + + // The root path is the inverse of Context::current + let root_path = vec!["../"; cx.current.len() - 1].join(""); + + let mut decoration_info = FxHashMap::default(); + decoration_info.insert("highlight focus", vec![byte_ranges.remove(0)]); + decoration_info.insert("highlight", byte_ranges); + + sources::print_src( + w, + contents_subset, + call_data.edition, + file_span, + cx, + &root_path, + Some(highlight::DecorationInfo(decoration_info)), + sources::SourceContext::Embedded { offset: line_min }, + ); + write!(w, "</div></div>"); + + true + }; + + // The call locations are output in sequence, so that sequence needs to be determined. + // Ideally the most "relevant" examples would be shown first, but there's no general algorithm + // for determining relevance. Instead, we prefer the smallest examples being likely the easiest to + // understand at a glance. + let ordered_locations = { + let sort_criterion = |(_, call_data): &(_, &CallData)| { + // Use the first location because that's what the user will see initially + let (lo, hi) = call_data.locations[0].enclosing_item.byte_span; + hi - lo + }; + + let mut locs = call_locations.iter().collect::<Vec<_>>(); + locs.sort_by_key(sort_criterion); + locs + }; + + let mut it = ordered_locations.into_iter().peekable(); + + // An example may fail to write if its source can't be read for some reason, so this method + // continues iterating until a write succeeds + let write_and_skip_failure = |w: &mut Buffer, it: &mut Peekable<_>| { + while let Some(example) = it.next() { + if write_example(&mut *w, example) { + break; + } + } + }; + + // Write just one example that's visible by default in the method's description. + write_and_skip_failure(w, &mut it); + + // Then add the remaining examples in a hidden section. + if it.peek().is_some() { + write!( + w, + "<details class=\"rustdoc-toggle more-examples-toggle\">\ + <summary class=\"hideme\">\ + <span>More examples</span>\ + </summary>\ + <div class=\"hide-more\">Hide additional examples</div>\ + <div class=\"more-scraped-examples\">\ + <div class=\"toggle-line\"><div class=\"toggle-line-inner\"></div></div>\ + <div class=\"more-scraped-examples-inner\">" + ); + + // Only generate inline code for MAX_FULL_EXAMPLES number of examples. Otherwise we could + // make the page arbitrarily huge! + for _ in 0..MAX_FULL_EXAMPLES { + write_and_skip_failure(w, &mut it); + } + + // For the remaining examples, generate a <ul> containing links to the source files. + if it.peek().is_some() { + write!(w, r#"<div class="example-links">Additional examples can be found in:<br><ul>"#); + it.for_each(|(_, call_data)| { + let (url, _) = link_to_loc(call_data, &call_data.locations[0]); + write!( + w, + r#"<li><a href="{url}">{name}</a></li>"#, + url = url, + name = call_data.display_name + ); + }); + write!(w, "</ul></div>"); + } + + write!(w, "</div></div></details>"); + } + + write!(w, "</div>"); +} diff --git a/src/librustdoc/html/render/print_item.rs b/src/librustdoc/html/render/print_item.rs new file mode 100644 index 000000000..99cf42919 --- /dev/null +++ b/src/librustdoc/html/render/print_item.rs @@ -0,0 +1,1974 @@ +use clean::AttributesExt; + +use rustc_data_structures::fx::{FxHashMap, FxHashSet}; +use rustc_hir as hir; +use rustc_hir::def::CtorKind; +use rustc_hir::def_id::DefId; +use rustc_middle::middle::stability; +use rustc_middle::span_bug; +use rustc_middle::ty::layout::LayoutError; +use rustc_middle::ty::{Adt, TyCtxt}; +use rustc_span::hygiene::MacroKind; +use rustc_span::symbol::{kw, sym, Symbol}; +use rustc_target::abi::{Layout, Primitive, TagEncoding, Variants}; +use std::cmp::Ordering; +use std::fmt; +use std::rc::Rc; + +use super::{ + collect_paths_for_type, document, ensure_trailing_slash, item_ty_to_section, + notable_traits_decl, render_assoc_item, render_assoc_items, render_attributes_in_code, + render_attributes_in_pre, render_impl, render_stability_since_raw, write_srclink, + AssocItemLink, Context, ImplRenderingParameters, +}; +use crate::clean; +use crate::config::ModuleSorting; +use crate::formats::item_type::ItemType; +use crate::formats::{AssocItemRender, Impl, RenderMode}; +use crate::html::escape::Escape; +use crate::html::format::{ + join_with_double_colon, print_abi_with_space, print_constness_with_space, print_where_clause, + Buffer, Ending, PrintWithSpace, +}; +use crate::html::highlight; +use crate::html::layout::Page; +use crate::html::markdown::{HeadingOffset, MarkdownSummaryLine}; +use crate::html::url_parts_builder::UrlPartsBuilder; + +use askama::Template; +use itertools::Itertools; + +const ITEM_TABLE_OPEN: &str = "<div class=\"item-table\">"; +const ITEM_TABLE_CLOSE: &str = "</div>"; +const ITEM_TABLE_ROW_OPEN: &str = "<div class=\"item-row\">"; +const ITEM_TABLE_ROW_CLOSE: &str = "</div>"; + +// A component in a `use` path, like `string` in std::string::ToString +struct PathComponent { + path: String, + name: Symbol, +} + +#[derive(Template)] +#[template(path = "print_item.html")] +struct ItemVars<'a> { + page: &'a Page<'a>, + static_root_path: &'a str, + typ: &'a str, + name: &'a str, + item_type: &'a str, + path_components: Vec<PathComponent>, + stability_since_raw: &'a str, + src_href: Option<&'a str>, +} + +/// Calls `print_where_clause` and returns `true` if a `where` clause was generated. +fn print_where_clause_and_check<'a, 'tcx: 'a>( + buffer: &mut Buffer, + gens: &'a clean::Generics, + cx: &'a Context<'tcx>, +) -> bool { + let len_before = buffer.len(); + write!(buffer, "{}", print_where_clause(gens, cx, 0, Ending::Newline)); + len_before != buffer.len() +} + +pub(super) fn print_item( + cx: &mut Context<'_>, + item: &clean::Item, + buf: &mut Buffer, + page: &Page<'_>, +) { + debug_assert!(!item.is_stripped()); + let typ = match *item.kind { + clean::ModuleItem(_) => { + if item.is_crate() { + "Crate " + } else { + "Module " + } + } + clean::FunctionItem(..) | clean::ForeignFunctionItem(..) => "Function ", + clean::TraitItem(..) => "Trait ", + clean::StructItem(..) => "Struct ", + clean::UnionItem(..) => "Union ", + clean::EnumItem(..) => "Enum ", + clean::TypedefItem(..) => "Type Definition ", + clean::MacroItem(..) => "Macro ", + clean::ProcMacroItem(ref mac) => match mac.kind { + MacroKind::Bang => "Macro ", + MacroKind::Attr => "Attribute Macro ", + MacroKind::Derive => "Derive Macro ", + }, + clean::PrimitiveItem(..) => "Primitive Type ", + clean::StaticItem(..) | clean::ForeignStaticItem(..) => "Static ", + clean::ConstantItem(..) => "Constant ", + clean::ForeignTypeItem => "Foreign Type ", + clean::KeywordItem => "Keyword ", + clean::OpaqueTyItem(..) => "Opaque Type ", + clean::TraitAliasItem(..) => "Trait Alias ", + _ => { + // We don't generate pages for any other type. + unreachable!(); + } + }; + let mut stability_since_raw = Buffer::new(); + render_stability_since_raw( + &mut stability_since_raw, + item.stable_since(cx.tcx()), + item.const_stability(cx.tcx()), + None, + None, + ); + let stability_since_raw: String = stability_since_raw.into_inner(); + + // Write source tag + // + // When this item is part of a `crate use` in a downstream crate, the + // source link in the downstream documentation will actually come back to + // this page, and this link will be auto-clicked. The `id` attribute is + // used to find the link to auto-click. + let src_href = + if cx.include_sources && !item.is_primitive() { cx.src_href(item) } else { None }; + + let path_components = if item.is_primitive() || item.is_keyword() { + vec![] + } else { + let cur = &cx.current; + let amt = if item.is_mod() { cur.len() - 1 } else { cur.len() }; + cur.iter() + .enumerate() + .take(amt) + .map(|(i, component)| PathComponent { + path: "../".repeat(cur.len() - i - 1), + name: *component, + }) + .collect() + }; + + let item_vars = ItemVars { + page, + static_root_path: page.get_static_root_path(), + typ, + name: item.name.as_ref().unwrap().as_str(), + item_type: &item.type_().to_string(), + path_components, + stability_since_raw: &stability_since_raw, + src_href: src_href.as_deref(), + }; + + item_vars.render_into(buf).unwrap(); + + match &*item.kind { + clean::ModuleItem(ref m) => item_module(buf, cx, item, &m.items), + clean::FunctionItem(ref f) | clean::ForeignFunctionItem(ref f) => { + item_function(buf, cx, item, f) + } + clean::TraitItem(ref t) => item_trait(buf, cx, item, t), + clean::StructItem(ref s) => item_struct(buf, cx, item, s), + clean::UnionItem(ref s) => item_union(buf, cx, item, s), + clean::EnumItem(ref e) => item_enum(buf, cx, item, e), + clean::TypedefItem(ref t) => item_typedef(buf, cx, item, t), + clean::MacroItem(ref m) => item_macro(buf, cx, item, m), + clean::ProcMacroItem(ref m) => item_proc_macro(buf, cx, item, m), + clean::PrimitiveItem(_) => item_primitive(buf, cx, item), + clean::StaticItem(ref i) | clean::ForeignStaticItem(ref i) => item_static(buf, cx, item, i), + clean::ConstantItem(ref c) => item_constant(buf, cx, item, c), + clean::ForeignTypeItem => item_foreign_type(buf, cx, item), + clean::KeywordItem => item_keyword(buf, cx, item), + clean::OpaqueTyItem(ref e) => item_opaque_ty(buf, cx, item, e), + clean::TraitAliasItem(ref ta) => item_trait_alias(buf, cx, item, ta), + _ => { + // We don't generate pages for any other type. + unreachable!(); + } + } +} + +/// For large structs, enums, unions, etc, determine whether to hide their fields +fn should_hide_fields(n_fields: usize) -> bool { + n_fields > 12 +} + +fn toggle_open(w: &mut Buffer, text: impl fmt::Display) { + write!( + w, + "<details class=\"rustdoc-toggle type-contents-toggle\">\ + <summary class=\"hideme\">\ + <span>Show {}</span>\ + </summary>", + text + ); +} + +fn toggle_close(w: &mut Buffer) { + w.write_str("</details>"); +} + +fn item_module(w: &mut Buffer, cx: &mut Context<'_>, item: &clean::Item, items: &[clean::Item]) { + document(w, cx, item, None, HeadingOffset::H2); + + let mut indices = (0..items.len()).filter(|i| !items[*i].is_stripped()).collect::<Vec<usize>>(); + + // the order of item types in the listing + fn reorder(ty: ItemType) -> u8 { + match ty { + ItemType::ExternCrate => 0, + ItemType::Import => 1, + ItemType::Primitive => 2, + ItemType::Module => 3, + ItemType::Macro => 4, + ItemType::Struct => 5, + ItemType::Enum => 6, + ItemType::Constant => 7, + ItemType::Static => 8, + ItemType::Trait => 9, + ItemType::Function => 10, + ItemType::Typedef => 12, + ItemType::Union => 13, + _ => 14 + ty as u8, + } + } + + fn cmp( + i1: &clean::Item, + i2: &clean::Item, + idx1: usize, + idx2: usize, + tcx: TyCtxt<'_>, + ) -> Ordering { + let ty1 = i1.type_(); + let ty2 = i2.type_(); + if item_ty_to_section(ty1) != item_ty_to_section(ty2) + || (ty1 != ty2 && (ty1 == ItemType::ExternCrate || ty2 == ItemType::ExternCrate)) + { + return (reorder(ty1), idx1).cmp(&(reorder(ty2), idx2)); + } + let s1 = i1.stability(tcx).as_ref().map(|s| s.level); + let s2 = i2.stability(tcx).as_ref().map(|s| s.level); + if let (Some(a), Some(b)) = (s1, s2) { + match (a.is_stable(), b.is_stable()) { + (true, true) | (false, false) => {} + (false, true) => return Ordering::Less, + (true, false) => return Ordering::Greater, + } + } + let lhs = i1.name.unwrap_or(kw::Empty); + let rhs = i2.name.unwrap_or(kw::Empty); + compare_names(lhs.as_str(), rhs.as_str()) + } + + match cx.shared.module_sorting { + ModuleSorting::Alphabetical => { + indices.sort_by(|&i1, &i2| cmp(&items[i1], &items[i2], i1, i2, cx.tcx())); + } + ModuleSorting::DeclarationOrder => {} + } + // This call is to remove re-export duplicates in cases such as: + // + // ``` + // pub(crate) mod foo { + // pub(crate) mod bar { + // pub(crate) trait Double { fn foo(); } + // } + // } + // + // pub(crate) use foo::bar::*; + // pub(crate) use foo::*; + // ``` + // + // `Double` will appear twice in the generated docs. + // + // FIXME: This code is quite ugly and could be improved. Small issue: DefId + // can be identical even if the elements are different (mostly in imports). + // So in case this is an import, we keep everything by adding a "unique id" + // (which is the position in the vector). + indices.dedup_by_key(|i| { + ( + items[*i].item_id, + if items[*i].name.is_some() { Some(full_path(cx, &items[*i])) } else { None }, + items[*i].type_(), + if items[*i].is_import() { *i } else { 0 }, + ) + }); + + debug!("{:?}", indices); + let mut last_section = None; + + for &idx in &indices { + let myitem = &items[idx]; + if myitem.is_stripped() { + continue; + } + + let my_section = item_ty_to_section(myitem.type_()); + if Some(my_section) != last_section { + if last_section.is_some() { + w.write_str(ITEM_TABLE_CLOSE); + } + last_section = Some(my_section); + write!( + w, + "<h2 id=\"{id}\" class=\"small-section-header\">\ + <a href=\"#{id}\">{name}</a>\ + </h2>{}", + ITEM_TABLE_OPEN, + id = cx.derive_id(my_section.id().to_owned()), + name = my_section.name(), + ); + } + + match *myitem.kind { + clean::ExternCrateItem { ref src } => { + use crate::html::format::anchor; + + w.write_str(ITEM_TABLE_ROW_OPEN); + match *src { + Some(src) => write!( + w, + "<div class=\"item-left\"><code>{}extern crate {} as {};", + myitem.visibility.print_with_space(myitem.item_id, cx), + anchor(myitem.item_id.expect_def_id(), src, cx), + myitem.name.unwrap(), + ), + None => write!( + w, + "<div class=\"item-left\"><code>{}extern crate {};", + myitem.visibility.print_with_space(myitem.item_id, cx), + anchor(myitem.item_id.expect_def_id(), myitem.name.unwrap(), cx), + ), + } + w.write_str("</code></div>"); + w.write_str(ITEM_TABLE_ROW_CLOSE); + } + + clean::ImportItem(ref import) => { + let (stab, stab_tags) = if let Some(import_def_id) = import.source.did { + let ast_attrs = cx.tcx().get_attrs_unchecked(import_def_id); + let import_attrs = Box::new(clean::Attributes::from_ast(ast_attrs)); + + // Just need an item with the correct def_id and attrs + let import_item = clean::Item { + item_id: import_def_id.into(), + attrs: import_attrs, + cfg: ast_attrs.cfg(cx.tcx(), &cx.cache().hidden_cfg), + ..myitem.clone() + }; + + let stab = import_item.stability_class(cx.tcx()); + let stab_tags = Some(extra_info_tags(&import_item, item, cx.tcx())); + (stab, stab_tags) + } else { + (None, None) + }; + + let add = if stab.is_some() { " " } else { "" }; + + w.write_str(ITEM_TABLE_ROW_OPEN); + let id = match import.kind { + clean::ImportKind::Simple(s) => { + format!(" id=\"{}\"", cx.derive_id(format!("reexport.{}", s))) + } + clean::ImportKind::Glob => String::new(), + }; + write!( + w, + "<div class=\"item-left {stab}{add}import-item\"{id}>\ + <code>{vis}{imp}</code>\ + </div>\ + <div class=\"item-right docblock-short\">{stab_tags}</div>", + stab = stab.unwrap_or_default(), + vis = myitem.visibility.print_with_space(myitem.item_id, cx), + imp = import.print(cx), + stab_tags = stab_tags.unwrap_or_default(), + ); + w.write_str(ITEM_TABLE_ROW_CLOSE); + } + + _ => { + if myitem.name.is_none() { + continue; + } + + let unsafety_flag = match *myitem.kind { + clean::FunctionItem(_) | clean::ForeignFunctionItem(_) + if myitem.fn_header(cx.tcx()).unwrap().unsafety + == hir::Unsafety::Unsafe => + { + "<a title=\"unsafe function\" href=\"#\"><sup>⚠</sup></a>" + } + _ => "", + }; + + let stab = myitem.stability_class(cx.tcx()); + let add = if stab.is_some() { " " } else { "" }; + + let visibility_emoji = match myitem.visibility { + clean::Visibility::Restricted(_) => { + "<span title=\"Restricted Visibility\"> 🔒</span> " + } + _ => "", + }; + + let doc_value = myitem.doc_value().unwrap_or_default(); + w.write_str(ITEM_TABLE_ROW_OPEN); + write!( + w, + "<div class=\"item-left {stab}{add}module-item\">\ + <a class=\"{class}\" href=\"{href}\" title=\"{title}\">{name}</a>\ + {visibility_emoji}\ + {unsafety_flag}\ + {stab_tags}\ + </div>\ + <div class=\"item-right docblock-short\">{docs}</div>", + name = myitem.name.unwrap(), + visibility_emoji = visibility_emoji, + stab_tags = extra_info_tags(myitem, item, cx.tcx()), + docs = MarkdownSummaryLine(&doc_value, &myitem.links(cx)).into_string(), + class = myitem.type_(), + add = add, + stab = stab.unwrap_or_default(), + unsafety_flag = unsafety_flag, + href = item_path(myitem.type_(), myitem.name.unwrap().as_str()), + title = [full_path(cx, myitem), myitem.type_().to_string()] + .iter() + .filter_map(|s| if !s.is_empty() { Some(s.as_str()) } else { None }) + .collect::<Vec<_>>() + .join(" "), + ); + w.write_str(ITEM_TABLE_ROW_CLOSE); + } + } + } + + if last_section.is_some() { + w.write_str(ITEM_TABLE_CLOSE); + } +} + +/// Render the stability, deprecation and portability tags that are displayed in the item's summary +/// at the module level. +fn extra_info_tags(item: &clean::Item, parent: &clean::Item, tcx: TyCtxt<'_>) -> String { + let mut tags = String::new(); + + fn tag_html(class: &str, title: &str, contents: &str) -> String { + format!(r#"<span class="stab {}" title="{}">{}</span>"#, class, Escape(title), contents) + } + + // The trailing space after each tag is to space it properly against the rest of the docs. + if let Some(depr) = &item.deprecation(tcx) { + let mut message = "Deprecated"; + if !stability::deprecation_in_effect(depr) { + message = "Deprecation planned"; + } + tags += &tag_html("deprecated", "", message); + } + + // The "rustc_private" crates are permanently unstable so it makes no sense + // to render "unstable" everywhere. + if item.stability(tcx).as_ref().map(|s| s.is_unstable() && s.feature != sym::rustc_private) + == Some(true) + { + tags += &tag_html("unstable", "", "Experimental"); + } + + let cfg = match (&item.cfg, parent.cfg.as_ref()) { + (Some(cfg), Some(parent_cfg)) => cfg.simplify_with(parent_cfg), + (cfg, _) => cfg.as_deref().cloned(), + }; + + debug!("Portability {:?} - {:?} = {:?}", item.cfg, parent.cfg, cfg); + if let Some(ref cfg) = cfg { + tags += &tag_html("portability", &cfg.render_long_plain(), &cfg.render_short_html()); + } + + tags +} + +fn item_function(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, f: &clean::Function) { + let header = it.fn_header(cx.tcx()).expect("printing a function which isn't a function"); + let constness = print_constness_with_space(&header.constness, it.const_stability(cx.tcx())); + let unsafety = header.unsafety.print_with_space(); + let abi = print_abi_with_space(header.abi).to_string(); + let asyncness = header.asyncness.print_with_space(); + let visibility = it.visibility.print_with_space(it.item_id, cx).to_string(); + let name = it.name.unwrap(); + + let generics_len = format!("{:#}", f.generics.print(cx)).len(); + let header_len = "fn ".len() + + visibility.len() + + constness.len() + + asyncness.len() + + unsafety.len() + + abi.len() + + name.as_str().len() + + generics_len; + + wrap_into_docblock(w, |w| { + wrap_item(w, "fn", |w| { + render_attributes_in_pre(w, it, ""); + w.reserve(header_len); + write!( + w, + "{vis}{constness}{asyncness}{unsafety}{abi}fn \ + {name}{generics}{decl}{notable_traits}{where_clause}", + vis = visibility, + constness = constness, + asyncness = asyncness, + unsafety = unsafety, + abi = abi, + name = name, + generics = f.generics.print(cx), + where_clause = print_where_clause(&f.generics, cx, 0, Ending::Newline), + decl = f.decl.full_print(header_len, 0, header.asyncness, cx), + notable_traits = notable_traits_decl(&f.decl, cx), + ); + }); + }); + document(w, cx, it, None, HeadingOffset::H2) +} + +fn item_trait(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean::Trait) { + let bounds = bounds(&t.bounds, false, cx); + let required_types = t.items.iter().filter(|m| m.is_ty_associated_type()).collect::<Vec<_>>(); + let provided_types = t.items.iter().filter(|m| m.is_associated_type()).collect::<Vec<_>>(); + let required_consts = t.items.iter().filter(|m| m.is_ty_associated_const()).collect::<Vec<_>>(); + let provided_consts = t.items.iter().filter(|m| m.is_associated_const()).collect::<Vec<_>>(); + let required_methods = t.items.iter().filter(|m| m.is_ty_method()).collect::<Vec<_>>(); + let provided_methods = t.items.iter().filter(|m| m.is_method()).collect::<Vec<_>>(); + let count_types = required_types.len() + provided_types.len(); + let count_consts = required_consts.len() + provided_consts.len(); + let count_methods = required_methods.len() + provided_methods.len(); + let must_implement_one_of_functions = + cx.tcx().trait_def(t.def_id).must_implement_one_of.clone(); + + // Output the trait definition + wrap_into_docblock(w, |w| { + wrap_item(w, "trait", |w| { + render_attributes_in_pre(w, it, ""); + write!( + w, + "{}{}{}trait {}{}{}", + it.visibility.print_with_space(it.item_id, cx), + t.unsafety(cx.tcx()).print_with_space(), + if t.is_auto(cx.tcx()) { "auto " } else { "" }, + it.name.unwrap(), + t.generics.print(cx), + bounds + ); + + if !t.generics.where_predicates.is_empty() { + write!(w, "{}", print_where_clause(&t.generics, cx, 0, Ending::Newline)); + } else { + w.write_str(" "); + } + + if t.items.is_empty() { + w.write_str("{ }"); + } else { + // FIXME: we should be using a derived_id for the Anchors here + w.write_str("{\n"); + let mut toggle = false; + + // If there are too many associated types, hide _everything_ + if should_hide_fields(count_types) { + toggle = true; + toggle_open( + w, + format_args!( + "{} associated items", + count_types + count_consts + count_methods + ), + ); + } + for types in [&required_types, &provided_types] { + for t in types { + render_assoc_item( + w, + t, + AssocItemLink::Anchor(None), + ItemType::Trait, + cx, + RenderMode::Normal, + ); + w.write_str(";\n"); + } + } + // If there are too many associated constants, hide everything after them + // We also do this if the types + consts is large because otherwise we could + // render a bunch of types and _then_ a bunch of consts just because both were + // _just_ under the limit + if !toggle && should_hide_fields(count_types + count_consts) { + toggle = true; + toggle_open( + w, + format_args!( + "{} associated constant{} and {} method{}", + count_consts, + pluralize(count_consts), + count_methods, + pluralize(count_methods), + ), + ); + } + if count_types != 0 && (count_consts != 0 || count_methods != 0) { + w.write_str("\n"); + } + for consts in [&required_consts, &provided_consts] { + for c in consts { + render_assoc_item( + w, + c, + AssocItemLink::Anchor(None), + ItemType::Trait, + cx, + RenderMode::Normal, + ); + w.write_str(";\n"); + } + } + if !toggle && should_hide_fields(count_methods) { + toggle = true; + toggle_open(w, format_args!("{} methods", count_methods)); + } + if count_consts != 0 && count_methods != 0 { + w.write_str("\n"); + } + for (pos, m) in required_methods.iter().enumerate() { + render_assoc_item( + w, + m, + AssocItemLink::Anchor(None), + ItemType::Trait, + cx, + RenderMode::Normal, + ); + w.write_str(";\n"); + + if pos < required_methods.len() - 1 { + w.write_str("<span class=\"item-spacer\"></span>"); + } + } + if !required_methods.is_empty() && !provided_methods.is_empty() { + w.write_str("\n"); + } + for (pos, m) in provided_methods.iter().enumerate() { + render_assoc_item( + w, + m, + AssocItemLink::Anchor(None), + ItemType::Trait, + cx, + RenderMode::Normal, + ); + match *m.kind { + clean::MethodItem(ref inner, _) + if !inner.generics.where_predicates.is_empty() => + { + w.write_str(",\n { ... }\n"); + } + _ => { + w.write_str(" { ... }\n"); + } + } + + if pos < provided_methods.len() - 1 { + w.write_str("<span class=\"item-spacer\"></span>"); + } + } + if toggle { + toggle_close(w); + } + w.write_str("}"); + } + }); + }); + + // Trait documentation + document(w, cx, it, None, HeadingOffset::H2); + + fn write_small_section_header(w: &mut Buffer, id: &str, title: &str, extra_content: &str) { + write!( + w, + "<h2 id=\"{0}\" class=\"small-section-header\">\ + {1}<a href=\"#{0}\" class=\"anchor\"></a>\ + </h2>{2}", + id, title, extra_content + ) + } + + fn trait_item(w: &mut Buffer, cx: &mut Context<'_>, m: &clean::Item, t: &clean::Item) { + let name = m.name.unwrap(); + info!("Documenting {} on {:?}", name, t.name); + let item_type = m.type_(); + let id = cx.derive_id(format!("{}.{}", item_type, name)); + let mut content = Buffer::empty_from(w); + document(&mut content, cx, m, Some(t), HeadingOffset::H5); + let toggled = !content.is_empty(); + if toggled { + write!(w, "<details class=\"rustdoc-toggle\" open><summary>"); + } + write!(w, "<div id=\"{}\" class=\"method has-srclink\">", id); + write!(w, "<div class=\"rightside\">"); + + let has_stability = render_stability_since(w, m, t, cx.tcx()); + if has_stability { + w.write_str(" · "); + } + write_srclink(cx, m, w); + write!(w, "</div>"); + write!(w, "<h4 class=\"code-header\">"); + render_assoc_item( + w, + m, + AssocItemLink::Anchor(Some(&id)), + ItemType::Impl, + cx, + RenderMode::Normal, + ); + w.write_str("</h4>"); + w.write_str("</div>"); + if toggled { + write!(w, "</summary>"); + w.push_buffer(content); + write!(w, "</details>"); + } + } + + if !required_types.is_empty() { + write_small_section_header( + w, + "required-associated-types", + "Required Associated Types", + "<div class=\"methods\">", + ); + for t in required_types { + trait_item(w, cx, t, it); + } + w.write_str("</div>"); + } + if !provided_types.is_empty() { + write_small_section_header( + w, + "provided-associated-types", + "Provided Associated Types", + "<div class=\"methods\">", + ); + for t in provided_types { + trait_item(w, cx, t, it); + } + w.write_str("</div>"); + } + + if !required_consts.is_empty() { + write_small_section_header( + w, + "required-associated-consts", + "Required Associated Constants", + "<div class=\"methods\">", + ); + for t in required_consts { + trait_item(w, cx, t, it); + } + w.write_str("</div>"); + } + if !provided_consts.is_empty() { + write_small_section_header( + w, + "provided-associated-consts", + "Provided Associated Constants", + "<div class=\"methods\">", + ); + for t in provided_consts { + trait_item(w, cx, t, it); + } + w.write_str("</div>"); + } + + // Output the documentation for each function individually + if !required_methods.is_empty() || must_implement_one_of_functions.is_some() { + write_small_section_header( + w, + "required-methods", + "Required Methods", + "<div class=\"methods\">", + ); + + if let Some(list) = must_implement_one_of_functions.as_deref() { + write!( + w, + "<div class=\"stab must_implement\">At least one of the `{}` methods is required.</div>", + list.iter().join("`, `") + ); + } + + for m in required_methods { + trait_item(w, cx, m, it); + } + w.write_str("</div>"); + } + if !provided_methods.is_empty() { + write_small_section_header( + w, + "provided-methods", + "Provided Methods", + "<div class=\"methods\">", + ); + for m in provided_methods { + trait_item(w, cx, m, it); + } + w.write_str("</div>"); + } + + // If there are methods directly on this trait object, render them here. + render_assoc_items(w, cx, it, it.item_id.expect_def_id(), AssocItemRender::All); + + let cloned_shared = Rc::clone(&cx.shared); + let cache = &cloned_shared.cache; + let mut extern_crates = FxHashSet::default(); + if let Some(implementors) = cache.implementors.get(&it.item_id.expect_def_id()) { + // The DefId is for the first Type found with that name. The bool is + // if any Types with the same name but different DefId have been found. + let mut implementor_dups: FxHashMap<Symbol, (DefId, bool)> = FxHashMap::default(); + for implementor in implementors { + if let Some(did) = implementor.inner_impl().for_.without_borrowed_ref().def_id(cache) && + !did.is_local() { + extern_crates.insert(did.krate); + } + match implementor.inner_impl().for_.without_borrowed_ref() { + clean::Type::Path { ref path } if !path.is_assoc_ty() => { + let did = path.def_id(); + let &mut (prev_did, ref mut has_duplicates) = + implementor_dups.entry(path.last()).or_insert((did, false)); + if prev_did != did { + *has_duplicates = true; + } + } + _ => {} + } + } + + let (local, foreign) = + implementors.iter().partition::<Vec<_>, _>(|i| i.is_on_local_type(cx)); + + let (mut synthetic, mut concrete): (Vec<&&Impl>, Vec<&&Impl>) = + local.iter().partition(|i| i.inner_impl().kind.is_auto()); + + synthetic.sort_by(|a, b| compare_impl(a, b, cx)); + concrete.sort_by(|a, b| compare_impl(a, b, cx)); + + if !foreign.is_empty() { + write_small_section_header(w, "foreign-impls", "Implementations on Foreign Types", ""); + + for implementor in foreign { + let provided_methods = implementor.inner_impl().provided_trait_methods(cx.tcx()); + let assoc_link = + AssocItemLink::GotoSource(implementor.impl_item.item_id, &provided_methods); + render_impl( + w, + cx, + implementor, + it, + assoc_link, + RenderMode::Normal, + None, + &[], + ImplRenderingParameters { + show_def_docs: false, + show_default_items: false, + show_non_assoc_items: true, + toggle_open_by_default: false, + }, + ); + } + } + + write_small_section_header( + w, + "implementors", + "Implementors", + "<div class=\"item-list\" id=\"implementors-list\">", + ); + for implementor in concrete { + render_implementor(cx, implementor, it, w, &implementor_dups, &[]); + } + w.write_str("</div>"); + + if t.is_auto(cx.tcx()) { + write_small_section_header( + w, + "synthetic-implementors", + "Auto implementors", + "<div class=\"item-list\" id=\"synthetic-implementors-list\">", + ); + for implementor in synthetic { + render_implementor( + cx, + implementor, + it, + w, + &implementor_dups, + &collect_paths_for_type(implementor.inner_impl().for_.clone(), cache), + ); + } + w.write_str("</div>"); + } + } else { + // even without any implementations to write in, we still want the heading and list, so the + // implementors javascript file pulled in below has somewhere to write the impls into + write_small_section_header( + w, + "implementors", + "Implementors", + "<div class=\"item-list\" id=\"implementors-list\"></div>", + ); + + if t.is_auto(cx.tcx()) { + write_small_section_header( + w, + "synthetic-implementors", + "Auto implementors", + "<div class=\"item-list\" id=\"synthetic-implementors-list\"></div>", + ); + } + } + + // Include implementors in crates that depend on the current crate. + // + // This is complicated by the way rustdoc is invoked, which is basically + // the same way rustc is invoked: it gets called, one at a time, for each + // crate. When building the rustdocs for the current crate, rustdoc can + // see crate metadata for its dependencies, but cannot see metadata for its + // dependents. + // + // To make this work, we generate a "hook" at this stage, and our + // dependents can "plug in" to it when they build. For simplicity's sake, + // it's [JSONP]: a JavaScript file with the data we need (and can parse), + // surrounded by a tiny wrapper that the Rust side ignores, but allows the + // JavaScript side to include without having to worry about Same Origin + // Policy. The code for *that* is in `write_shared.rs`. + // + // This is further complicated by `#[doc(inline)]`. We want all copies + // of an inlined trait to reference the same JS file, to address complex + // dependency graphs like this one (lower crates depend on higher crates): + // + // ```text + // -------------------------------------------- + // | crate A: trait Foo | + // -------------------------------------------- + // | | + // -------------------------------- | + // | crate B: impl A::Foo for Bar | | + // -------------------------------- | + // | | + // --------------------------------------------- + // | crate C: #[doc(inline)] use A::Foo as Baz | + // | impl Baz for Quux | + // --------------------------------------------- + // ``` + // + // Basically, we want `C::Baz` and `A::Foo` to show the same set of + // impls, which is easier if they both treat `/implementors/A/trait.Foo.js` + // as the Single Source of Truth. + // + // We also want the `impl Baz for Quux` to be written to + // `trait.Foo.js`. However, when we generate plain HTML for `C::Baz`, + // we're going to want to generate plain HTML for `impl Baz for Quux` too, + // because that'll load faster, and it's better for SEO. And we don't want + // the same impl to show up twice on the same page. + // + // To make this work, the implementors JS file has a structure kinda + // like this: + // + // ```js + // JSONP({ + // "B": {"impl A::Foo for Bar"}, + // "C": {"impl Baz for Quux"}, + // }); + // ``` + // + // First of all, this means we can rebuild a crate, and it'll replace its own + // data if something changes. That is, `rustdoc` is idempotent. The other + // advantage is that we can list the crates that get included in the HTML, + // and ignore them when doing the JavaScript-based part of rendering. + // So C's HTML will have something like this: + // + // ```html + // <script type="text/javascript" src="/implementors/A/trait.Foo.js" + // data-ignore-extern-crates="A,B" async></script> + // ``` + // + // And, when the JS runs, anything in data-ignore-extern-crates is known + // to already be in the HTML, and will be ignored. + // + // [JSONP]: https://en.wikipedia.org/wiki/JSONP + let mut js_src_path: UrlPartsBuilder = std::iter::repeat("..") + .take(cx.current.len()) + .chain(std::iter::once("implementors")) + .collect(); + if let Some(did) = it.item_id.as_def_id() && + let get_extern = { || cache.external_paths.get(&did).map(|s| s.0.clone()) } && + let Some(fqp) = cache.exact_paths.get(&did).cloned().or_else(get_extern) { + js_src_path.extend(fqp[..fqp.len() - 1].iter().copied()); + js_src_path.push_fmt(format_args!("{}.{}.js", it.type_(), fqp.last().unwrap())); + } else { + js_src_path.extend(cx.current.iter().copied()); + js_src_path.push_fmt(format_args!("{}.{}.js", it.type_(), it.name.unwrap())); + } + let extern_crates = extern_crates + .into_iter() + .map(|cnum| cx.shared.tcx.crate_name(cnum).to_string()) + .collect::<Vec<_>>() + .join(","); + write!( + w, + "<script type=\"text/javascript\" src=\"{src}\" data-ignore-extern-crates=\"{extern_crates}\" async></script>", + src = js_src_path.finish(), + ); +} + +fn item_trait_alias(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean::TraitAlias) { + wrap_into_docblock(w, |w| { + wrap_item(w, "trait-alias", |w| { + render_attributes_in_pre(w, it, ""); + write!( + w, + "trait {}{}{} = {};", + it.name.unwrap(), + t.generics.print(cx), + print_where_clause(&t.generics, cx, 0, Ending::Newline), + bounds(&t.bounds, true, cx) + ); + }); + }); + + document(w, cx, it, None, HeadingOffset::H2); + + // Render any items associated directly to this alias, as otherwise they + // won't be visible anywhere in the docs. It would be nice to also show + // associated items from the aliased type (see discussion in #32077), but + // we need #14072 to make sense of the generics. + render_assoc_items(w, cx, it, it.item_id.expect_def_id(), AssocItemRender::All) +} + +fn item_opaque_ty(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean::OpaqueTy) { + wrap_into_docblock(w, |w| { + wrap_item(w, "opaque", |w| { + render_attributes_in_pre(w, it, ""); + write!( + w, + "type {}{}{where_clause} = impl {bounds};", + it.name.unwrap(), + t.generics.print(cx), + where_clause = print_where_clause(&t.generics, cx, 0, Ending::Newline), + bounds = bounds(&t.bounds, false, cx), + ); + }); + }); + + document(w, cx, it, None, HeadingOffset::H2); + + // Render any items associated directly to this alias, as otherwise they + // won't be visible anywhere in the docs. It would be nice to also show + // associated items from the aliased type (see discussion in #32077), but + // we need #14072 to make sense of the generics. + render_assoc_items(w, cx, it, it.item_id.expect_def_id(), AssocItemRender::All) +} + +fn item_typedef(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean::Typedef) { + fn write_content(w: &mut Buffer, cx: &Context<'_>, it: &clean::Item, t: &clean::Typedef) { + wrap_item(w, "typedef", |w| { + render_attributes_in_pre(w, it, ""); + write!(w, "{}", it.visibility.print_with_space(it.item_id, cx)); + write!( + w, + "type {}{}{where_clause} = {type_};", + it.name.unwrap(), + t.generics.print(cx), + where_clause = print_where_clause(&t.generics, cx, 0, Ending::Newline), + type_ = t.type_.print(cx), + ); + }); + } + + wrap_into_docblock(w, |w| write_content(w, cx, it, t)); + + document(w, cx, it, None, HeadingOffset::H2); + + let def_id = it.item_id.expect_def_id(); + // Render any items associated directly to this alias, as otherwise they + // won't be visible anywhere in the docs. It would be nice to also show + // associated items from the aliased type (see discussion in #32077), but + // we need #14072 to make sense of the generics. + render_assoc_items(w, cx, it, def_id, AssocItemRender::All); + document_type_layout(w, cx, def_id); +} + +fn item_union(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, s: &clean::Union) { + wrap_into_docblock(w, |w| { + wrap_item(w, "union", |w| { + render_attributes_in_pre(w, it, ""); + render_union(w, it, Some(&s.generics), &s.fields, "", cx); + }); + }); + + document(w, cx, it, None, HeadingOffset::H2); + + let mut fields = s + .fields + .iter() + .filter_map(|f| match *f.kind { + clean::StructFieldItem(ref ty) => Some((f, ty)), + _ => None, + }) + .peekable(); + if fields.peek().is_some() { + write!( + w, + "<h2 id=\"fields\" class=\"fields small-section-header\">\ + Fields<a href=\"#fields\" class=\"anchor\"></a>\ + </h2>" + ); + for (field, ty) in fields { + let name = field.name.expect("union field name"); + let id = format!("{}.{}", ItemType::StructField, name); + write!( + w, + "<span id=\"{id}\" class=\"{shortty} small-section-header\">\ + <a href=\"#{id}\" class=\"anchor field\"></a>\ + <code>{name}: {ty}</code>\ + </span>", + id = id, + name = name, + shortty = ItemType::StructField, + ty = ty.print(cx), + ); + if let Some(stability_class) = field.stability_class(cx.tcx()) { + write!(w, "<span class=\"stab {stab}\"></span>", stab = stability_class); + } + document(w, cx, field, Some(it), HeadingOffset::H3); + } + } + let def_id = it.item_id.expect_def_id(); + render_assoc_items(w, cx, it, def_id, AssocItemRender::All); + document_type_layout(w, cx, def_id); +} + +fn print_tuple_struct_fields(w: &mut Buffer, cx: &Context<'_>, s: &[clean::Item]) { + for (i, ty) in s.iter().enumerate() { + if i > 0 { + w.write_str(", "); + } + match *ty.kind { + clean::StrippedItem(box clean::StructFieldItem(_)) => w.write_str("_"), + clean::StructFieldItem(ref ty) => write!(w, "{}", ty.print(cx)), + _ => unreachable!(), + } + } +} + +fn item_enum(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, e: &clean::Enum) { + let count_variants = e.variants().count(); + wrap_into_docblock(w, |w| { + wrap_item(w, "enum", |w| { + render_attributes_in_pre(w, it, ""); + write!( + w, + "{}enum {}{}", + it.visibility.print_with_space(it.item_id, cx), + it.name.unwrap(), + e.generics.print(cx), + ); + if !print_where_clause_and_check(w, &e.generics, cx) { + // If there wasn't a `where` clause, we add a whitespace. + w.write_str(" "); + } + + let variants_stripped = e.has_stripped_entries(); + if count_variants == 0 && !variants_stripped { + w.write_str("{}"); + } else { + w.write_str("{\n"); + let toggle = should_hide_fields(count_variants); + if toggle { + toggle_open(w, format_args!("{} variants", count_variants)); + } + for v in e.variants() { + w.write_str(" "); + let name = v.name.unwrap(); + match *v.kind { + clean::VariantItem(ref var) => match var { + clean::Variant::CLike => write!(w, "{}", name), + clean::Variant::Tuple(ref s) => { + write!(w, "{}(", name); + print_tuple_struct_fields(w, cx, s); + w.write_str(")"); + } + clean::Variant::Struct(ref s) => { + render_struct( + w, + v, + None, + s.struct_type, + &s.fields, + " ", + false, + cx, + ); + } + }, + _ => unreachable!(), + } + w.write_str(",\n"); + } + + if variants_stripped { + w.write_str(" // some variants omitted\n"); + } + if toggle { + toggle_close(w); + } + w.write_str("}"); + } + }); + }); + + document(w, cx, it, None, HeadingOffset::H2); + + if count_variants != 0 { + write!( + w, + "<h2 id=\"variants\" class=\"variants small-section-header\">\ + Variants{}<a href=\"#variants\" class=\"anchor\"></a>\ + </h2>", + document_non_exhaustive_header(it) + ); + document_non_exhaustive(w, it); + for variant in e.variants() { + let id = cx.derive_id(format!("{}.{}", ItemType::Variant, variant.name.unwrap())); + write!( + w, + "<h3 id=\"{id}\" class=\"variant small-section-header\">\ + <a href=\"#{id}\" class=\"anchor field\"></a>\ + <code>{name}", + id = id, + name = variant.name.unwrap() + ); + if let clean::VariantItem(clean::Variant::Tuple(ref s)) = *variant.kind { + w.write_str("("); + print_tuple_struct_fields(w, cx, s); + w.write_str(")"); + } + w.write_str("</code>"); + render_stability_since(w, variant, it, cx.tcx()); + w.write_str("</h3>"); + + use crate::clean::Variant; + + let heading_and_fields = match &*variant.kind { + clean::VariantItem(Variant::Struct(s)) => Some(("Fields", &s.fields)), + // Documentation on tuple variant fields is rare, so to reduce noise we only emit + // the section if at least one field is documented. + clean::VariantItem(Variant::Tuple(fields)) + if fields.iter().any(|f| f.doc_value().is_some()) => + { + Some(("Tuple Fields", fields)) + } + _ => None, + }; + + if let Some((heading, fields)) = heading_and_fields { + let variant_id = + cx.derive_id(format!("{}.{}.fields", ItemType::Variant, variant.name.unwrap())); + write!(w, "<div class=\"sub-variant\" id=\"{id}\">", id = variant_id); + write!(w, "<h4>{heading}</h4>", heading = heading); + document_non_exhaustive(w, variant); + for field in fields { + match *field.kind { + clean::StrippedItem(box clean::StructFieldItem(_)) => {} + clean::StructFieldItem(ref ty) => { + let id = cx.derive_id(format!( + "variant.{}.field.{}", + variant.name.unwrap(), + field.name.unwrap() + )); + write!( + w, + "<div class=\"sub-variant-field\">\ + <span id=\"{id}\" class=\"variant small-section-header\">\ + <a href=\"#{id}\" class=\"anchor field\"></a>\ + <code>{f}: {t}</code>\ + </span>", + id = id, + f = field.name.unwrap(), + t = ty.print(cx) + ); + document(w, cx, field, Some(variant), HeadingOffset::H5); + write!(w, "</div>"); + } + _ => unreachable!(), + } + } + w.write_str("</div>"); + } + + document(w, cx, variant, Some(it), HeadingOffset::H4); + } + } + let def_id = it.item_id.expect_def_id(); + render_assoc_items(w, cx, it, def_id, AssocItemRender::All); + document_type_layout(w, cx, def_id); +} + +fn item_macro(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean::Macro) { + wrap_into_docblock(w, |w| { + highlight::render_with_highlighting( + &t.source, + w, + Some("macro"), + None, + None, + it.span(cx.tcx()).inner().edition(), + None, + None, + None, + ); + }); + document(w, cx, it, None, HeadingOffset::H2) +} + +fn item_proc_macro(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, m: &clean::ProcMacro) { + wrap_into_docblock(w, |w| { + let name = it.name.expect("proc-macros always have names"); + match m.kind { + MacroKind::Bang => { + wrap_item(w, "macro", |w| { + write!(w, "{}!() {{ /* proc-macro */ }}", name); + }); + } + MacroKind::Attr => { + wrap_item(w, "attr", |w| { + write!(w, "#[{}]", name); + }); + } + MacroKind::Derive => { + wrap_item(w, "derive", |w| { + write!(w, "#[derive({})]", name); + if !m.helpers.is_empty() { + w.push_str("\n{\n"); + w.push_str(" // Attributes available to this derive:\n"); + for attr in &m.helpers { + writeln!(w, " #[{}]", attr); + } + w.push_str("}\n"); + } + }); + } + } + }); + document(w, cx, it, None, HeadingOffset::H2) +} + +fn item_primitive(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item) { + document(w, cx, it, None, HeadingOffset::H2); + render_assoc_items(w, cx, it, it.item_id.expect_def_id(), AssocItemRender::All) +} + +fn item_constant(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, c: &clean::Constant) { + wrap_into_docblock(w, |w| { + wrap_item(w, "const", |w| { + render_attributes_in_code(w, it); + + write!( + w, + "{vis}const {name}: {typ}", + vis = it.visibility.print_with_space(it.item_id, cx), + name = it.name.unwrap(), + typ = c.type_.print(cx), + ); + + // FIXME: The code below now prints + // ` = _; // 100i32` + // if the expression is + // `50 + 50` + // which looks just wrong. + // Should we print + // ` = 100i32;` + // instead? + + let value = c.value(cx.tcx()); + let is_literal = c.is_literal(cx.tcx()); + let expr = c.expr(cx.tcx()); + if value.is_some() || is_literal { + write!(w, " = {expr};", expr = Escape(&expr)); + } else { + w.write_str(";"); + } + + if !is_literal { + if let Some(value) = &value { + let value_lowercase = value.to_lowercase(); + let expr_lowercase = expr.to_lowercase(); + + if value_lowercase != expr_lowercase + && value_lowercase.trim_end_matches("i32") != expr_lowercase + { + write!(w, " // {value}", value = Escape(value)); + } + } + } + }); + }); + + document(w, cx, it, None, HeadingOffset::H2) +} + +fn item_struct(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, s: &clean::Struct) { + wrap_into_docblock(w, |w| { + wrap_item(w, "struct", |w| { + render_attributes_in_code(w, it); + render_struct(w, it, Some(&s.generics), s.struct_type, &s.fields, "", true, cx); + }); + }); + + document(w, cx, it, None, HeadingOffset::H2); + + let mut fields = s + .fields + .iter() + .filter_map(|f| match *f.kind { + clean::StructFieldItem(ref ty) => Some((f, ty)), + _ => None, + }) + .peekable(); + if let CtorKind::Fictive | CtorKind::Fn = s.struct_type { + if fields.peek().is_some() { + write!( + w, + "<h2 id=\"fields\" class=\"fields small-section-header\">\ + {}{}<a href=\"#fields\" class=\"anchor\"></a>\ + </h2>", + if let CtorKind::Fictive = s.struct_type { "Fields" } else { "Tuple Fields" }, + document_non_exhaustive_header(it) + ); + document_non_exhaustive(w, it); + for (index, (field, ty)) in fields.enumerate() { + let field_name = + field.name.map_or_else(|| index.to_string(), |sym| sym.as_str().to_string()); + let id = cx.derive_id(format!("{}.{}", ItemType::StructField, field_name)); + write!( + w, + "<span id=\"{id}\" class=\"{item_type} small-section-header\">\ + <a href=\"#{id}\" class=\"anchor field\"></a>\ + <code>{name}: {ty}</code>\ + </span>", + item_type = ItemType::StructField, + id = id, + name = field_name, + ty = ty.print(cx) + ); + document(w, cx, field, Some(it), HeadingOffset::H3); + } + } + } + let def_id = it.item_id.expect_def_id(); + render_assoc_items(w, cx, it, def_id, AssocItemRender::All); + document_type_layout(w, cx, def_id); +} + +fn item_static(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, s: &clean::Static) { + wrap_into_docblock(w, |w| { + wrap_item(w, "static", |w| { + render_attributes_in_code(w, it); + write!( + w, + "{vis}static {mutability}{name}: {typ}", + vis = it.visibility.print_with_space(it.item_id, cx), + mutability = s.mutability.print_with_space(), + name = it.name.unwrap(), + typ = s.type_.print(cx) + ); + }); + }); + document(w, cx, it, None, HeadingOffset::H2) +} + +fn item_foreign_type(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item) { + wrap_into_docblock(w, |w| { + wrap_item(w, "foreigntype", |w| { + w.write_str("extern {\n"); + render_attributes_in_code(w, it); + write!( + w, + " {}type {};\n}}", + it.visibility.print_with_space(it.item_id, cx), + it.name.unwrap(), + ); + }); + }); + + document(w, cx, it, None, HeadingOffset::H2); + + render_assoc_items(w, cx, it, it.item_id.expect_def_id(), AssocItemRender::All) +} + +fn item_keyword(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item) { + document(w, cx, it, None, HeadingOffset::H2) +} + +/// Compare two strings treating multi-digit numbers as single units (i.e. natural sort order). +pub(crate) fn compare_names(mut lhs: &str, mut rhs: &str) -> Ordering { + /// Takes a non-numeric and a numeric part from the given &str. + fn take_parts<'a>(s: &mut &'a str) -> (&'a str, &'a str) { + let i = s.find(|c: char| c.is_ascii_digit()); + let (a, b) = s.split_at(i.unwrap_or(s.len())); + let i = b.find(|c: char| !c.is_ascii_digit()); + let (b, c) = b.split_at(i.unwrap_or(b.len())); + *s = c; + (a, b) + } + + while !lhs.is_empty() || !rhs.is_empty() { + let (la, lb) = take_parts(&mut lhs); + let (ra, rb) = take_parts(&mut rhs); + // First process the non-numeric part. + match la.cmp(ra) { + Ordering::Equal => (), + x => return x, + } + // Then process the numeric part, if both sides have one (and they fit in a u64). + if let (Ok(ln), Ok(rn)) = (lb.parse::<u64>(), rb.parse::<u64>()) { + match ln.cmp(&rn) { + Ordering::Equal => (), + x => return x, + } + } + // Then process the numeric part again, but this time as strings. + match lb.cmp(rb) { + Ordering::Equal => (), + x => return x, + } + } + + Ordering::Equal +} + +pub(super) fn full_path(cx: &Context<'_>, item: &clean::Item) -> String { + let mut s = join_with_double_colon(&cx.current); + s.push_str("::"); + s.push_str(item.name.unwrap().as_str()); + s +} + +pub(super) fn item_path(ty: ItemType, name: &str) -> String { + match ty { + ItemType::Module => format!("{}index.html", ensure_trailing_slash(name)), + _ => format!("{}.{}.html", ty, name), + } +} + +fn bounds(t_bounds: &[clean::GenericBound], trait_alias: bool, cx: &Context<'_>) -> String { + let mut bounds = String::new(); + if !t_bounds.is_empty() { + if !trait_alias { + bounds.push_str(": "); + } + for (i, p) in t_bounds.iter().enumerate() { + if i > 0 { + bounds.push_str(" + "); + } + bounds.push_str(&p.print(cx).to_string()); + } + } + bounds +} + +fn wrap_into_docblock<F>(w: &mut Buffer, f: F) +where + F: FnOnce(&mut Buffer), +{ + w.write_str("<div class=\"docblock item-decl\">"); + f(w); + w.write_str("</div>") +} + +fn wrap_item<F>(w: &mut Buffer, item_name: &str, f: F) +where + F: FnOnce(&mut Buffer), +{ + w.write_fmt(format_args!("<pre class=\"rust {}\"><code>", item_name)); + f(w); + w.write_str("</code></pre>"); +} + +fn render_stability_since( + w: &mut Buffer, + item: &clean::Item, + containing_item: &clean::Item, + tcx: TyCtxt<'_>, +) -> bool { + render_stability_since_raw( + w, + item.stable_since(tcx), + item.const_stability(tcx), + containing_item.stable_since(tcx), + containing_item.const_stable_since(tcx), + ) +} + +fn compare_impl<'a, 'b>(lhs: &'a &&Impl, rhs: &'b &&Impl, cx: &Context<'_>) -> Ordering { + let lhss = format!("{}", lhs.inner_impl().print(false, cx)); + let rhss = format!("{}", rhs.inner_impl().print(false, cx)); + + // lhs and rhs are formatted as HTML, which may be unnecessary + compare_names(&lhss, &rhss) +} + +fn render_implementor( + cx: &mut Context<'_>, + implementor: &Impl, + trait_: &clean::Item, + w: &mut Buffer, + implementor_dups: &FxHashMap<Symbol, (DefId, bool)>, + aliases: &[String], +) { + // If there's already another implementor that has the same abridged name, use the + // full path, for example in `std::iter::ExactSizeIterator` + let use_absolute = match implementor.inner_impl().for_ { + clean::Type::Path { ref path, .. } + | clean::BorrowedRef { type_: box clean::Type::Path { ref path, .. }, .. } + if !path.is_assoc_ty() => + { + implementor_dups[&path.last()].1 + } + _ => false, + }; + render_impl( + w, + cx, + implementor, + trait_, + AssocItemLink::Anchor(None), + RenderMode::Normal, + Some(use_absolute), + aliases, + ImplRenderingParameters { + show_def_docs: false, + show_default_items: false, + show_non_assoc_items: false, + toggle_open_by_default: false, + }, + ); +} + +fn render_union( + w: &mut Buffer, + it: &clean::Item, + g: Option<&clean::Generics>, + fields: &[clean::Item], + tab: &str, + cx: &Context<'_>, +) { + write!(w, "{}union {}", it.visibility.print_with_space(it.item_id, cx), it.name.unwrap(),); + + let where_displayed = g + .map(|g| { + write!(w, "{}", g.print(cx)); + print_where_clause_and_check(w, g, cx) + }) + .unwrap_or(false); + + // If there wasn't a `where` clause, we add a whitespace. + if !where_displayed { + w.write_str(" "); + } + + write!(w, "{{\n{}", tab); + let count_fields = + fields.iter().filter(|f| matches!(*f.kind, clean::StructFieldItem(..))).count(); + let toggle = should_hide_fields(count_fields); + if toggle { + toggle_open(w, format_args!("{} fields", count_fields)); + } + + for field in fields { + if let clean::StructFieldItem(ref ty) = *field.kind { + write!( + w, + " {}{}: {},\n{}", + field.visibility.print_with_space(field.item_id, cx), + field.name.unwrap(), + ty.print(cx), + tab + ); + } + } + + if it.has_stripped_entries().unwrap() { + write!(w, " /* private fields */\n{}", tab); + } + if toggle { + toggle_close(w); + } + w.write_str("}"); +} + +fn render_struct( + w: &mut Buffer, + it: &clean::Item, + g: Option<&clean::Generics>, + ty: CtorKind, + fields: &[clean::Item], + tab: &str, + structhead: bool, + cx: &Context<'_>, +) { + write!( + w, + "{}{}{}", + it.visibility.print_with_space(it.item_id, cx), + if structhead { "struct " } else { "" }, + it.name.unwrap() + ); + if let Some(g) = g { + write!(w, "{}", g.print(cx)) + } + match ty { + CtorKind::Fictive => { + let where_diplayed = g.map(|g| print_where_clause_and_check(w, g, cx)).unwrap_or(false); + + // If there wasn't a `where` clause, we add a whitespace. + if !where_diplayed { + w.write_str(" {"); + } else { + w.write_str("{"); + } + let count_fields = + fields.iter().filter(|f| matches!(*f.kind, clean::StructFieldItem(..))).count(); + let has_visible_fields = count_fields > 0; + let toggle = should_hide_fields(count_fields); + if toggle { + toggle_open(w, format_args!("{} fields", count_fields)); + } + for field in fields { + if let clean::StructFieldItem(ref ty) = *field.kind { + write!( + w, + "\n{} {}{}: {},", + tab, + field.visibility.print_with_space(field.item_id, cx), + field.name.unwrap(), + ty.print(cx), + ); + } + } + + if has_visible_fields { + if it.has_stripped_entries().unwrap() { + write!(w, "\n{} /* private fields */", tab); + } + write!(w, "\n{}", tab); + } else if it.has_stripped_entries().unwrap() { + write!(w, " /* private fields */ "); + } + if toggle { + toggle_close(w); + } + w.write_str("}"); + } + CtorKind::Fn => { + w.write_str("("); + for (i, field) in fields.iter().enumerate() { + if i > 0 { + w.write_str(", "); + } + match *field.kind { + clean::StrippedItem(box clean::StructFieldItem(..)) => write!(w, "_"), + clean::StructFieldItem(ref ty) => { + write!( + w, + "{}{}", + field.visibility.print_with_space(field.item_id, cx), + ty.print(cx), + ) + } + _ => unreachable!(), + } + } + w.write_str(")"); + if let Some(g) = g { + write!(w, "{}", print_where_clause(g, cx, 0, Ending::NoNewline)); + } + // We only want a ";" when we are displaying a tuple struct, not a variant tuple struct. + if structhead { + w.write_str(";"); + } + } + CtorKind::Const => { + // Needed for PhantomData. + if let Some(g) = g { + write!(w, "{}", print_where_clause(g, cx, 0, Ending::NoNewline)); + } + w.write_str(";"); + } + } +} + +fn document_non_exhaustive_header(item: &clean::Item) -> &str { + if item.is_non_exhaustive() { " (Non-exhaustive)" } else { "" } +} + +fn document_non_exhaustive(w: &mut Buffer, item: &clean::Item) { + if item.is_non_exhaustive() { + write!( + w, + "<details class=\"rustdoc-toggle non-exhaustive\">\ + <summary class=\"hideme\"><span>{}</span></summary>\ + <div class=\"docblock\">", + { + if item.is_struct() { + "This struct is marked as non-exhaustive" + } else if item.is_enum() { + "This enum is marked as non-exhaustive" + } else if item.is_variant() { + "This variant is marked as non-exhaustive" + } else { + "This type is marked as non-exhaustive" + } + } + ); + + if item.is_struct() { + w.write_str( + "Non-exhaustive structs could have additional fields added in future. \ + Therefore, non-exhaustive structs cannot be constructed in external crates \ + using the traditional <code>Struct { .. }</code> syntax; cannot be \ + matched against without a wildcard <code>..</code>; and \ + struct update syntax will not work.", + ); + } else if item.is_enum() { + w.write_str( + "Non-exhaustive enums could have additional variants added in future. \ + Therefore, when matching against variants of non-exhaustive enums, an \ + extra wildcard arm must be added to account for any future variants.", + ); + } else if item.is_variant() { + w.write_str( + "Non-exhaustive enum variants could have additional fields added in future. \ + Therefore, non-exhaustive enum variants cannot be constructed in external \ + crates and cannot be matched against.", + ); + } else { + w.write_str( + "This type will require a wildcard arm in any match statements or constructors.", + ); + } + + w.write_str("</div></details>"); + } +} + +fn document_type_layout(w: &mut Buffer, cx: &Context<'_>, ty_def_id: DefId) { + fn write_size_of_layout(w: &mut Buffer, layout: Layout<'_>, tag_size: u64) { + if layout.abi().is_unsized() { + write!(w, "(unsized)"); + } else { + let bytes = layout.size().bytes() - tag_size; + write!(w, "{size} byte{pl}", size = bytes, pl = if bytes == 1 { "" } else { "s" },); + } + } + + if !cx.shared.show_type_layout { + return; + } + + writeln!( + w, + "<h2 id=\"layout\" class=\"small-section-header\"> \ + Layout<a href=\"#layout\" class=\"anchor\"></a></h2>" + ); + writeln!(w, "<div class=\"docblock\">"); + + let tcx = cx.tcx(); + let param_env = tcx.param_env(ty_def_id); + let ty = tcx.type_of(ty_def_id); + match tcx.layout_of(param_env.and(ty)) { + Ok(ty_layout) => { + writeln!( + w, + "<div class=\"warning\"><p><strong>Note:</strong> Most layout information is \ + <strong>completely unstable</strong> and may even differ between compilations. \ + The only exception is types with certain <code>repr(...)</code> attributes. \ + Please see the Rust Reference’s \ + <a href=\"https://doc.rust-lang.org/reference/type-layout.html\">“Type Layout”</a> \ + chapter for details on type layout guarantees.</p></div>" + ); + w.write_str("<p><strong>Size:</strong> "); + write_size_of_layout(w, ty_layout.layout, 0); + writeln!(w, "</p>"); + if let Variants::Multiple { variants, tag, tag_encoding, .. } = + &ty_layout.layout.variants() + { + if !variants.is_empty() { + w.write_str( + "<p><strong>Size for each variant:</strong></p>\ + <ul>", + ); + + let Adt(adt, _) = ty_layout.ty.kind() else { + span_bug!(tcx.def_span(ty_def_id), "not an adt") + }; + + let tag_size = if let TagEncoding::Niche { .. } = tag_encoding { + 0 + } else if let Primitive::Int(i, _) = tag.primitive() { + i.size().bytes() + } else { + span_bug!(tcx.def_span(ty_def_id), "tag is neither niche nor int") + }; + + for (index, layout) in variants.iter_enumerated() { + let name = adt.variant(index).name; + write!(w, "<li><code>{name}</code>: ", name = name); + write_size_of_layout(w, *layout, tag_size); + writeln!(w, "</li>"); + } + w.write_str("</ul>"); + } + } + } + // This kind of layout error can occur with valid code, e.g. if you try to + // get the layout of a generic type such as `Vec<T>`. + Err(LayoutError::Unknown(_)) => { + writeln!( + w, + "<p><strong>Note:</strong> Unable to compute type layout, \ + possibly due to this type having generic parameters. \ + Layout can only be computed for concrete, fully-instantiated types.</p>" + ); + } + // This kind of error probably can't happen with valid code, but we don't + // want to panic and prevent the docs from building, so we just let the + // user know that we couldn't compute the layout. + Err(LayoutError::SizeOverflow(_)) => { + writeln!( + w, + "<p><strong>Note:</strong> Encountered an error during type layout; \ + the type was too big.</p>" + ); + } + Err(LayoutError::NormalizationFailure(_, _)) => { + writeln!( + w, + "<p><strong>Note:</strong> Encountered an error during type layout; \ + the type failed to be normalized.</p>" + ) + } + } + + writeln!(w, "</div>"); +} + +fn pluralize(count: usize) -> &'static str { + if count > 1 { "s" } else { "" } +} diff --git a/src/librustdoc/html/render/search_index.rs b/src/librustdoc/html/render/search_index.rs new file mode 100644 index 000000000..d672f0bb5 --- /dev/null +++ b/src/librustdoc/html/render/search_index.rs @@ -0,0 +1,589 @@ +use std::collections::hash_map::Entry; +use std::collections::BTreeMap; + +use rustc_data_structures::fx::FxHashMap; +use rustc_middle::ty::TyCtxt; +use rustc_span::def_id::LOCAL_CRATE; +use rustc_span::symbol::Symbol; +use serde::ser::{Serialize, SerializeStruct, Serializer}; + +use crate::clean; +use crate::clean::types::{ + FnRetTy, Function, GenericBound, Generics, ItemId, Type, WherePredicate, +}; +use crate::formats::cache::{Cache, OrphanImplItem}; +use crate::formats::item_type::ItemType; +use crate::html::format::join_with_double_colon; +use crate::html::markdown::short_markdown_summary; +use crate::html::render::{IndexItem, IndexItemFunctionType, RenderType, RenderTypeId}; + +/// Builds the search index from the collected metadata +pub(crate) fn build_index<'tcx>( + krate: &clean::Crate, + cache: &mut Cache, + tcx: TyCtxt<'tcx>, +) -> String { + let mut itemid_to_pathid = FxHashMap::default(); + let mut crate_paths = vec![]; + + // Attach all orphan items to the type's definition if the type + // has since been learned. + for &OrphanImplItem { parent, ref item, ref impl_generics } in &cache.orphan_impl_items { + if let Some(&(ref fqp, _)) = cache.paths.get(&parent) { + let desc = item + .doc_value() + .map_or_else(String::new, |s| short_markdown_summary(&s, &item.link_names(cache))); + cache.search_index.push(IndexItem { + ty: item.type_(), + name: item.name.unwrap().to_string(), + path: join_with_double_colon(&fqp[..fqp.len() - 1]), + desc, + parent: Some(parent), + parent_idx: None, + search_type: get_function_type_for_search(item, tcx, impl_generics.as_ref(), cache), + aliases: item.attrs.get_doc_aliases(), + }); + } + } + + let crate_doc = krate + .module + .doc_value() + .map_or_else(String::new, |s| short_markdown_summary(&s, &krate.module.link_names(cache))); + + // Aliases added through `#[doc(alias = "...")]`. Since a few items can have the same alias, + // we need the alias element to have an array of items. + let mut aliases: BTreeMap<String, Vec<usize>> = BTreeMap::new(); + + // Sort search index items. This improves the compressibility of the search index. + cache.search_index.sort_unstable_by(|k1, k2| { + // `sort_unstable_by_key` produces lifetime errors + let k1 = (&k1.path, &k1.name, &k1.ty, &k1.parent); + let k2 = (&k2.path, &k2.name, &k2.ty, &k2.parent); + std::cmp::Ord::cmp(&k1, &k2) + }); + + // Set up alias indexes. + for (i, item) in cache.search_index.iter().enumerate() { + for alias in &item.aliases[..] { + aliases.entry(alias.as_str().to_lowercase()).or_default().push(i); + } + } + + // Reduce `DefId` in paths into smaller sequential numbers, + // and prune the paths that do not appear in the index. + let mut lastpath = ""; + let mut lastpathid = 0usize; + + // First, on function signatures + let mut search_index = std::mem::replace(&mut cache.search_index, Vec::new()); + for item in search_index.iter_mut() { + fn convert_render_type( + ty: &mut RenderType, + cache: &mut Cache, + itemid_to_pathid: &mut FxHashMap<ItemId, usize>, + lastpathid: &mut usize, + crate_paths: &mut Vec<(ItemType, Symbol)>, + ) { + if let Some(generics) = &mut ty.generics { + for item in generics { + convert_render_type(item, cache, itemid_to_pathid, lastpathid, crate_paths); + } + } + let Cache { ref paths, ref external_paths, .. } = *cache; + let Some(id) = ty.id.clone() else { + assert!(ty.generics.is_some()); + return; + }; + let (itemid, path, item_type) = match id { + RenderTypeId::DefId(defid) => { + if let Some(&(ref fqp, item_type)) = + paths.get(&defid).or_else(|| external_paths.get(&defid)) + { + (ItemId::DefId(defid), *fqp.last().unwrap(), item_type) + } else { + ty.id = None; + return; + } + } + RenderTypeId::Primitive(primitive) => ( + ItemId::Primitive(primitive, LOCAL_CRATE), + primitive.as_sym(), + ItemType::Primitive, + ), + RenderTypeId::Index(_) => return, + }; + match itemid_to_pathid.entry(itemid) { + Entry::Occupied(entry) => ty.id = Some(RenderTypeId::Index(*entry.get())), + Entry::Vacant(entry) => { + let pathid = *lastpathid; + entry.insert(pathid); + *lastpathid += 1; + crate_paths.push((item_type, path)); + ty.id = Some(RenderTypeId::Index(pathid)); + } + } + } + if let Some(search_type) = &mut item.search_type { + for item in &mut search_type.inputs { + convert_render_type( + item, + cache, + &mut itemid_to_pathid, + &mut lastpathid, + &mut crate_paths, + ); + } + for item in &mut search_type.output { + convert_render_type( + item, + cache, + &mut itemid_to_pathid, + &mut lastpathid, + &mut crate_paths, + ); + } + } + } + + let Cache { ref paths, .. } = *cache; + + // Then, on parent modules + let crate_items: Vec<&IndexItem> = search_index + .iter_mut() + .map(|item| { + item.parent_idx = + item.parent.and_then(|defid| match itemid_to_pathid.entry(ItemId::DefId(defid)) { + Entry::Occupied(entry) => Some(*entry.get()), + Entry::Vacant(entry) => { + let pathid = lastpathid; + entry.insert(pathid); + lastpathid += 1; + + if let Some(&(ref fqp, short)) = paths.get(&defid) { + crate_paths.push((short, *fqp.last().unwrap())); + Some(pathid) + } else { + None + } + } + }); + + // Omit the parent path if it is same to that of the prior item. + if lastpath == &item.path { + item.path.clear(); + } else { + lastpath = &item.path; + } + + &*item + }) + .collect(); + + struct CrateData<'a> { + doc: String, + items: Vec<&'a IndexItem>, + paths: Vec<(ItemType, Symbol)>, + // The String is alias name and the vec is the list of the elements with this alias. + // + // To be noted: the `usize` elements are indexes to `items`. + aliases: &'a BTreeMap<String, Vec<usize>>, + } + + impl<'a> Serialize for CrateData<'a> { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + let has_aliases = !self.aliases.is_empty(); + let mut crate_data = + serializer.serialize_struct("CrateData", if has_aliases { 9 } else { 8 })?; + crate_data.serialize_field("doc", &self.doc)?; + crate_data.serialize_field( + "t", + &self.items.iter().map(|item| &item.ty).collect::<Vec<_>>(), + )?; + crate_data.serialize_field( + "n", + &self.items.iter().map(|item| &item.name).collect::<Vec<_>>(), + )?; + crate_data.serialize_field( + "q", + &self.items.iter().map(|item| &item.path).collect::<Vec<_>>(), + )?; + crate_data.serialize_field( + "d", + &self.items.iter().map(|item| &item.desc).collect::<Vec<_>>(), + )?; + crate_data.serialize_field( + "i", + &self + .items + .iter() + .map(|item| { + assert_eq!( + item.parent.is_some(), + item.parent_idx.is_some(), + "`{}` is missing idx", + item.name + ); + // 0 is a sentinel, everything else is one-indexed + item.parent_idx.map(|x| x + 1).unwrap_or(0) + }) + .collect::<Vec<_>>(), + )?; + crate_data.serialize_field( + "f", + &self + .items + .iter() + .map(|item| { + // Fake option to get `0` out as a sentinel instead of `null`. + // We want to use `0` because it's three less bytes. + enum FunctionOption<'a> { + Function(&'a IndexItemFunctionType), + None, + } + impl<'a> Serialize for FunctionOption<'a> { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + match self { + FunctionOption::None => 0.serialize(serializer), + FunctionOption::Function(ty) => ty.serialize(serializer), + } + } + } + match &item.search_type { + Some(ty) => FunctionOption::Function(ty), + None => FunctionOption::None, + } + }) + .collect::<Vec<_>>(), + )?; + crate_data.serialize_field( + "p", + &self.paths.iter().map(|(it, s)| (it, s.to_string())).collect::<Vec<_>>(), + )?; + if has_aliases { + crate_data.serialize_field("a", &self.aliases)?; + } + crate_data.end() + } + } + + // Collect the index into a string + format!( + r#""{}":{}"#, + krate.name(tcx), + serde_json::to_string(&CrateData { + doc: crate_doc, + items: crate_items, + paths: crate_paths, + aliases: &aliases, + }) + .expect("failed serde conversion") + // All these `replace` calls are because we have to go through JS string for JSON content. + .replace('\\', r"\\") + .replace('\'', r"\'") + // We need to escape double quotes for the JSON. + .replace("\\\"", "\\\\\"") + ) +} + +pub(crate) fn get_function_type_for_search<'tcx>( + item: &clean::Item, + tcx: TyCtxt<'tcx>, + impl_generics: Option<&(clean::Type, clean::Generics)>, + cache: &Cache, +) -> Option<IndexItemFunctionType> { + let (mut inputs, mut output) = match *item.kind { + clean::FunctionItem(ref f) => get_fn_inputs_and_outputs(f, tcx, impl_generics, cache), + clean::MethodItem(ref m, _) => get_fn_inputs_and_outputs(m, tcx, impl_generics, cache), + clean::TyMethodItem(ref m) => get_fn_inputs_and_outputs(m, tcx, impl_generics, cache), + _ => return None, + }; + + inputs.retain(|a| a.id.is_some() || a.generics.is_some()); + output.retain(|a| a.id.is_some() || a.generics.is_some()); + + Some(IndexItemFunctionType { inputs, output }) +} + +fn get_index_type(clean_type: &clean::Type, generics: Vec<RenderType>) -> RenderType { + RenderType { + id: get_index_type_id(clean_type), + generics: if generics.is_empty() { None } else { Some(generics) }, + } +} + +fn get_index_type_id(clean_type: &clean::Type) -> Option<RenderTypeId> { + match *clean_type { + clean::Type::Path { ref path, .. } => Some(RenderTypeId::DefId(path.def_id())), + clean::DynTrait(ref bounds, _) => { + let path = &bounds[0].trait_; + Some(RenderTypeId::DefId(path.def_id())) + } + clean::Primitive(p) => Some(RenderTypeId::Primitive(p)), + clean::BorrowedRef { ref type_, .. } | clean::RawPointer(_, ref type_) => { + get_index_type_id(type_) + } + clean::BareFunction(_) + | clean::Generic(_) + | clean::ImplTrait(_) + | clean::Tuple(_) + | clean::Slice(_) + | clean::Array(_, _) + | clean::QPath { .. } + | clean::Infer => None, + } +} + +/// The point of this function is to replace bounds with types. +/// +/// i.e. `[T, U]` when you have the following bounds: `T: Display, U: Option<T>` will return +/// `[Display, Option]`. If a type parameter has no trait bound, it is discarded. +/// +/// Important note: It goes through generics recursively. So if you have +/// `T: Option<Result<(), ()>>`, it'll go into `Option` and then into `Result`. +#[instrument(level = "trace", skip(tcx, res, cache))] +fn add_generics_and_bounds_as_types<'tcx, 'a>( + self_: Option<&'a Type>, + generics: &Generics, + arg: &'a Type, + tcx: TyCtxt<'tcx>, + recurse: usize, + res: &mut Vec<RenderType>, + cache: &Cache, +) { + fn insert_ty(res: &mut Vec<RenderType>, ty: Type, mut generics: Vec<RenderType>) { + // generics and impl trait are both identified by their generics, + // rather than a type name itself + let anonymous = ty.is_full_generic() || ty.is_impl_trait(); + let generics_empty = generics.is_empty(); + + if anonymous { + if generics_empty { + // This is a type parameter with no trait bounds (for example: `T` in + // `fn f<T>(p: T)`, so not useful for the rustdoc search because we would end up + // with an empty type with an empty name. Let's just discard it. + return; + } else if generics.len() == 1 { + // In this case, no need to go through an intermediate state if the type parameter + // contains only one trait bound. + // + // For example: + // + // `fn foo<T: Display>(r: Option<T>) {}` + // + // In this case, it would contain: + // + // ``` + // [{ + // name: "option", + // generics: [{ + // name: "", + // generics: [ + // name: "Display", + // generics: [] + // }] + // }] + // }] + // ``` + // + // After removing the intermediate (unnecessary) type parameter, it'll become: + // + // ``` + // [{ + // name: "option", + // generics: [{ + // name: "Display", + // generics: [] + // }] + // }] + // ``` + // + // To be noted that it can work if there is ONLY ONE trait bound, otherwise we still + // need to keep it as is! + res.push(generics.pop().unwrap()); + return; + } + } + let index_ty = get_index_type(&ty, generics); + if index_ty.id.is_none() && generics_empty { + return; + } + res.push(index_ty); + } + + if recurse >= 10 { + // FIXME: remove this whole recurse thing when the recursion bug is fixed + // See #59502 for the original issue. + return; + } + + // First, check if it's "Self". + let arg = if let Some(self_) = self_ { + match &*arg { + Type::BorrowedRef { type_, .. } if type_.is_self_type() => self_, + type_ if type_.is_self_type() => self_, + arg => arg, + } + } else { + arg + }; + + // If this argument is a type parameter and not a trait bound or a type, we need to look + // for its bounds. + if let Type::Generic(arg_s) = *arg { + // First we check if the bounds are in a `where` predicate... + if let Some(where_pred) = generics.where_predicates.iter().find(|g| match g { + WherePredicate::BoundPredicate { ty, .. } => ty.def_id(cache) == arg.def_id(cache), + _ => false, + }) { + let mut ty_generics = Vec::new(); + let bounds = where_pred.get_bounds().unwrap_or_else(|| &[]); + for bound in bounds.iter() { + if let GenericBound::TraitBound(poly_trait, _) = bound { + for param_def in poly_trait.generic_params.iter() { + match ¶m_def.kind { + clean::GenericParamDefKind::Type { default: Some(ty), .. } => { + add_generics_and_bounds_as_types( + self_, + generics, + ty, + tcx, + recurse + 1, + &mut ty_generics, + cache, + ) + } + _ => {} + } + } + } + } + insert_ty(res, arg.clone(), ty_generics); + } + // Otherwise we check if the trait bounds are "inlined" like `T: Option<u32>`... + if let Some(bound) = generics.params.iter().find(|g| g.is_type() && g.name == arg_s) { + let mut ty_generics = Vec::new(); + for bound in bound.get_bounds().unwrap_or(&[]) { + if let Some(path) = bound.get_trait_path() { + let ty = Type::Path { path }; + add_generics_and_bounds_as_types( + self_, + generics, + &ty, + tcx, + recurse + 1, + &mut ty_generics, + cache, + ); + } + } + insert_ty(res, arg.clone(), ty_generics); + } + } else if let Type::ImplTrait(ref bounds) = *arg { + let mut ty_generics = Vec::new(); + for bound in bounds { + if let Some(path) = bound.get_trait_path() { + let ty = Type::Path { path }; + add_generics_and_bounds_as_types( + self_, + generics, + &ty, + tcx, + recurse + 1, + &mut ty_generics, + cache, + ); + } + } + insert_ty(res, arg.clone(), ty_generics); + } else { + // This is not a type parameter. So for example if we have `T, U: Option<T>`, and we're + // looking at `Option`, we enter this "else" condition, otherwise if it's `T`, we don't. + // + // So in here, we can add it directly and look for its own type parameters (so for `Option`, + // we will look for them but not for `T`). + let mut ty_generics = Vec::new(); + if let Some(arg_generics) = arg.generics() { + for gen in arg_generics.iter() { + add_generics_and_bounds_as_types( + self_, + generics, + gen, + tcx, + recurse + 1, + &mut ty_generics, + cache, + ); + } + } + insert_ty(res, arg.clone(), ty_generics); + } +} + +/// Return the full list of types when bounds have been resolved. +/// +/// i.e. `fn foo<A: Display, B: Option<A>>(x: u32, y: B)` will return +/// `[u32, Display, Option]`. +fn get_fn_inputs_and_outputs<'tcx>( + func: &Function, + tcx: TyCtxt<'tcx>, + impl_generics: Option<&(clean::Type, clean::Generics)>, + cache: &Cache, +) -> (Vec<RenderType>, Vec<RenderType>) { + let decl = &func.decl; + + let combined_generics; + let (self_, generics) = if let Some(&(ref impl_self, ref impl_generics)) = impl_generics { + match (impl_generics.is_empty(), func.generics.is_empty()) { + (true, _) => (Some(impl_self), &func.generics), + (_, true) => (Some(impl_self), impl_generics), + (false, false) => { + let mut params = func.generics.params.clone(); + params.extend(impl_generics.params.clone()); + let mut where_predicates = func.generics.where_predicates.clone(); + where_predicates.extend(impl_generics.where_predicates.clone()); + combined_generics = clean::Generics { params, where_predicates }; + (Some(impl_self), &combined_generics) + } + } + } else { + (None, &func.generics) + }; + + let mut all_types = Vec::new(); + for arg in decl.inputs.values.iter() { + let mut args = Vec::new(); + add_generics_and_bounds_as_types(self_, generics, &arg.type_, tcx, 0, &mut args, cache); + if !args.is_empty() { + all_types.extend(args); + } else { + all_types.push(get_index_type(&arg.type_, vec![])); + } + } + + let mut ret_types = Vec::new(); + match decl.output { + FnRetTy::Return(ref return_type) => { + add_generics_and_bounds_as_types( + self_, + generics, + return_type, + tcx, + 0, + &mut ret_types, + cache, + ); + if ret_types.is_empty() { + ret_types.push(get_index_type(return_type, vec![])); + } + } + _ => {} + }; + (all_types, ret_types) +} diff --git a/src/librustdoc/html/render/span_map.rs b/src/librustdoc/html/render/span_map.rs new file mode 100644 index 000000000..34d590fb2 --- /dev/null +++ b/src/librustdoc/html/render/span_map.rs @@ -0,0 +1,203 @@ +use crate::clean::{self, PrimitiveType}; +use crate::html::sources; + +use rustc_data_structures::fx::FxHashMap; +use rustc_hir::def::{DefKind, Res}; +use rustc_hir::def_id::DefId; +use rustc_hir::intravisit::{self, Visitor}; +use rustc_hir::{ExprKind, HirId, Mod, Node}; +use rustc_middle::hir::nested_filter; +use rustc_middle::ty::TyCtxt; +use rustc_span::hygiene::MacroKind; +use rustc_span::{BytePos, ExpnKind, Span}; + +use std::path::{Path, PathBuf}; + +/// This enum allows us to store two different kinds of information: +/// +/// In case the `span` definition comes from the same crate, we can simply get the `span` and use +/// it as is. +/// +/// Otherwise, we store the definition `DefId` and will generate a link to the documentation page +/// instead of the source code directly. +#[derive(Debug)] +pub(crate) enum LinkFromSrc { + Local(clean::Span), + External(DefId), + Primitive(PrimitiveType), +} + +/// This function will do at most two things: +/// +/// 1. Generate a `span` correspondance map which links an item `span` to its definition `span`. +/// 2. Collect the source code files. +/// +/// It returns the `krate`, the source code files and the `span` correspondance map. +/// +/// Note about the `span` correspondance map: the keys are actually `(lo, hi)` of `span`s. We don't +/// need the `span` context later on, only their position, so instead of keep a whole `Span`, we +/// only keep the `lo` and `hi`. +pub(crate) fn collect_spans_and_sources( + tcx: TyCtxt<'_>, + krate: &clean::Crate, + src_root: &Path, + include_sources: bool, + generate_link_to_definition: bool, +) -> (FxHashMap<PathBuf, String>, FxHashMap<Span, LinkFromSrc>) { + let mut visitor = SpanMapVisitor { tcx, matches: FxHashMap::default() }; + + if include_sources { + if generate_link_to_definition { + tcx.hir().walk_toplevel_module(&mut visitor); + } + let sources = sources::collect_local_sources(tcx, src_root, krate); + (sources, visitor.matches) + } else { + (Default::default(), Default::default()) + } +} + +struct SpanMapVisitor<'tcx> { + pub(crate) tcx: TyCtxt<'tcx>, + pub(crate) matches: FxHashMap<Span, LinkFromSrc>, +} + +impl<'tcx> SpanMapVisitor<'tcx> { + /// This function is where we handle `hir::Path` elements and add them into the "span map". + fn handle_path(&mut self, path: &rustc_hir::Path<'_>) { + let info = match path.res { + // FIXME: For now, we handle `DefKind` if it's not a `DefKind::TyParam`. + // Would be nice to support them too alongside the other `DefKind` + // (such as primitive types!). + Res::Def(kind, def_id) if kind != DefKind::TyParam => Some(def_id), + Res::Local(_) => None, + Res::PrimTy(p) => { + // FIXME: Doesn't handle "path-like" primitives like arrays or tuples. + self.matches.insert(path.span, LinkFromSrc::Primitive(PrimitiveType::from(p))); + return; + } + Res::Err => return, + _ => return, + }; + if let Some(span) = self.tcx.hir().res_span(path.res) { + self.matches.insert(path.span, LinkFromSrc::Local(clean::Span::new(span))); + } else if let Some(def_id) = info { + self.matches.insert(path.span, LinkFromSrc::External(def_id)); + } + } + + /// Adds the macro call into the span map. Returns `true` if the `span` was inside a macro + /// expansion, whether or not it was added to the span map. + /// + /// The idea for the macro support is to check if the current `Span` comes from expansion. If + /// so, we loop until we find the macro definition by using `outer_expn_data` in a loop. + /// Finally, we get the information about the macro itself (`span` if "local", `DefId` + /// otherwise) and store it inside the span map. + fn handle_macro(&mut self, span: Span) -> bool { + if !span.from_expansion() { + return false; + } + // So if the `span` comes from a macro expansion, we need to get the original + // macro's `DefId`. + let mut data = span.ctxt().outer_expn_data(); + let mut call_site = data.call_site; + // Macros can expand to code containing macros, which will in turn be expanded, etc. + // So the idea here is to "go up" until we're back to code that was generated from + // macro expansion so that we can get the `DefId` of the original macro that was at the + // origin of this expansion. + while call_site.from_expansion() { + data = call_site.ctxt().outer_expn_data(); + call_site = data.call_site; + } + + let macro_name = match data.kind { + ExpnKind::Macro(MacroKind::Bang, macro_name) => macro_name, + // Even though we don't handle this kind of macro, this `data` still comes from + // expansion so we return `true` so we don't go any deeper in this code. + _ => return true, + }; + let link_from_src = match data.macro_def_id { + Some(macro_def_id) if macro_def_id.is_local() => { + LinkFromSrc::Local(clean::Span::new(data.def_site)) + } + Some(macro_def_id) => LinkFromSrc::External(macro_def_id), + None => return true, + }; + let new_span = data.call_site; + let macro_name = macro_name.as_str(); + // The "call_site" includes the whole macro with its "arguments". We only want + // the macro name. + let new_span = new_span.with_hi(new_span.lo() + BytePos(macro_name.len() as u32)); + self.matches.insert(new_span, link_from_src); + true + } +} + +impl<'tcx> Visitor<'tcx> for SpanMapVisitor<'tcx> { + type NestedFilter = nested_filter::All; + + fn nested_visit_map(&mut self) -> Self::Map { + self.tcx.hir() + } + + fn visit_path(&mut self, path: &'tcx rustc_hir::Path<'tcx>, _id: HirId) { + if self.handle_macro(path.span) { + return; + } + self.handle_path(path); + intravisit::walk_path(self, path); + } + + fn visit_mod(&mut self, m: &'tcx Mod<'tcx>, span: Span, id: HirId) { + // To make the difference between "mod foo {}" and "mod foo;". In case we "import" another + // file, we want to link to it. Otherwise no need to create a link. + if !span.overlaps(m.spans.inner_span) { + // Now that we confirmed it's a file import, we want to get the span for the module + // name only and not all the "mod foo;". + if let Some(Node::Item(item)) = self.tcx.hir().find(id) { + self.matches.insert( + item.ident.span, + LinkFromSrc::Local(clean::Span::new(m.spans.inner_span)), + ); + } + } + intravisit::walk_mod(self, m, id); + } + + fn visit_expr(&mut self, expr: &'tcx rustc_hir::Expr<'tcx>) { + if let ExprKind::MethodCall(segment, ..) = expr.kind { + if let Some(hir_id) = segment.hir_id { + let hir = self.tcx.hir(); + let body_id = hir.enclosing_body_owner(hir_id); + // FIXME: this is showing error messages for parts of the code that are not + // compiled (because of cfg)! + // + // See discussion in https://github.com/rust-lang/rust/issues/69426#issuecomment-1019412352 + let typeck_results = self.tcx.typeck_body( + hir.maybe_body_owned_by(body_id).expect("a body which isn't a body"), + ); + if let Some(def_id) = typeck_results.type_dependent_def_id(expr.hir_id) { + self.matches.insert( + segment.ident.span, + match hir.span_if_local(def_id) { + Some(span) => LinkFromSrc::Local(clean::Span::new(span)), + None => LinkFromSrc::External(def_id), + }, + ); + } + } + } else if self.handle_macro(expr.span) { + // We don't want to go deeper into the macro. + return; + } + intravisit::walk_expr(self, expr); + } + + fn visit_use(&mut self, path: &'tcx rustc_hir::Path<'tcx>, id: HirId) { + if self.handle_macro(path.span) { + return; + } + self.handle_path(path); + intravisit::walk_use(self, path, id); + } +} diff --git a/src/librustdoc/html/render/tests.rs b/src/librustdoc/html/render/tests.rs new file mode 100644 index 000000000..3175fbe56 --- /dev/null +++ b/src/librustdoc/html/render/tests.rs @@ -0,0 +1,54 @@ +use std::cmp::Ordering; + +use super::print_item::compare_names; +use super::{AllTypes, Buffer}; + +#[test] +fn test_compare_names() { + for &(a, b) in &[ + ("hello", "world"), + ("", "world"), + ("123", "hello"), + ("123", ""), + ("123test", "123"), + ("hello", ""), + ("hello", "hello"), + ("hello123", "hello123"), + ("hello123", "hello12"), + ("hello12", "hello123"), + ("hello01abc", "hello01xyz"), + ("hello0abc", "hello0"), + ("hello0", "hello0abc"), + ("01", "1"), + ] { + assert_eq!(compare_names(a, b), a.cmp(b), "{:?} - {:?}", a, b); + } + assert_eq!(compare_names("u8", "u16"), Ordering::Less); + assert_eq!(compare_names("u32", "u16"), Ordering::Greater); + assert_eq!(compare_names("u8_to_f64", "u16_to_f64"), Ordering::Less); + assert_eq!(compare_names("u32_to_f64", "u16_to_f64"), Ordering::Greater); + assert_eq!(compare_names("u16_to_f64", "u16_to_f64"), Ordering::Equal); + assert_eq!(compare_names("u16_to_f32", "u16_to_f64"), Ordering::Less); +} + +#[test] +fn test_name_sorting() { + let names = [ + "Apple", "Banana", "Fruit", "Fruit0", "Fruit00", "Fruit01", "Fruit1", "Fruit02", "Fruit2", + "Fruit20", "Fruit30x", "Fruit100", "Pear", + ]; + let mut sorted = names.to_owned(); + sorted.sort_by(|&l, r| compare_names(l, r)); + assert_eq!(names, sorted); +} + +#[test] +fn test_all_types_prints_header_once() { + // Regression test for #82477 + let all_types = AllTypes::new(); + + let mut buffer = Buffer::new(); + all_types.print(&mut buffer); + + assert_eq!(1, buffer.into_inner().matches("List of all items").count()); +} diff --git a/src/librustdoc/html/render/write_shared.rs b/src/librustdoc/html/render/write_shared.rs new file mode 100644 index 000000000..6fb41ff32 --- /dev/null +++ b/src/librustdoc/html/render/write_shared.rs @@ -0,0 +1,600 @@ +use std::ffi::OsStr; +use std::fmt::Write; +use std::fs::{self, File}; +use std::io::prelude::*; +use std::io::{self, BufReader}; +use std::path::{Component, Path, PathBuf}; +use std::rc::Rc; +use std::sync::LazyLock as Lazy; + +use itertools::Itertools; +use rustc_data_structures::flock; +use rustc_data_structures::fx::{FxHashMap, FxHashSet}; +use serde::Serialize; + +use super::{collect_paths_for_type, ensure_trailing_slash, Context, BASIC_KEYWORDS}; +use crate::clean::Crate; +use crate::config::{EmitType, RenderOptions}; +use crate::docfs::PathError; +use crate::error::Error; +use crate::html::{layout, static_files}; +use crate::{try_err, try_none}; + +static FILES_UNVERSIONED: Lazy<FxHashMap<&str, &[u8]>> = Lazy::new(|| { + map! { + "FiraSans-Regular.woff2" => static_files::fira_sans::REGULAR, + "FiraSans-Medium.woff2" => static_files::fira_sans::MEDIUM, + "FiraSans-LICENSE.txt" => static_files::fira_sans::LICENSE, + "SourceSerif4-Regular.ttf.woff2" => static_files::source_serif_4::REGULAR, + "SourceSerif4-Bold.ttf.woff2" => static_files::source_serif_4::BOLD, + "SourceSerif4-It.ttf.woff2" => static_files::source_serif_4::ITALIC, + "SourceSerif4-LICENSE.md" => static_files::source_serif_4::LICENSE, + "SourceCodePro-Regular.ttf.woff2" => static_files::source_code_pro::REGULAR, + "SourceCodePro-Semibold.ttf.woff2" => static_files::source_code_pro::SEMIBOLD, + "SourceCodePro-It.ttf.woff2" => static_files::source_code_pro::ITALIC, + "SourceCodePro-LICENSE.txt" => static_files::source_code_pro::LICENSE, + "NanumBarunGothic.ttf.woff2" => static_files::nanum_barun_gothic::REGULAR, + "NanumBarunGothic-LICENSE.txt" => static_files::nanum_barun_gothic::LICENSE, + "LICENSE-MIT.txt" => static_files::LICENSE_MIT, + "LICENSE-APACHE.txt" => static_files::LICENSE_APACHE, + "COPYRIGHT.txt" => static_files::COPYRIGHT, + } +}); + +enum SharedResource<'a> { + /// This file will never change, no matter what toolchain is used to build it. + /// + /// It does not have a resource suffix. + Unversioned { name: &'static str }, + /// This file may change depending on the toolchain. + /// + /// It has a resource suffix. + ToolchainSpecific { basename: &'static str }, + /// This file may change for any crate within a build, or based on the CLI arguments. + /// + /// This differs from normal invocation-specific files because it has a resource suffix. + InvocationSpecific { basename: &'a str }, +} + +impl SharedResource<'_> { + fn extension(&self) -> Option<&OsStr> { + use SharedResource::*; + match self { + Unversioned { name } + | ToolchainSpecific { basename: name } + | InvocationSpecific { basename: name } => Path::new(name).extension(), + } + } + + fn path(&self, cx: &Context<'_>) -> PathBuf { + match self { + SharedResource::Unversioned { name } => cx.dst.join(name), + SharedResource::ToolchainSpecific { basename } => cx.suffix_path(basename), + SharedResource::InvocationSpecific { basename } => cx.suffix_path(basename), + } + } + + fn should_emit(&self, emit: &[EmitType]) -> bool { + if emit.is_empty() { + return true; + } + let kind = match self { + SharedResource::Unversioned { .. } => EmitType::Unversioned, + SharedResource::ToolchainSpecific { .. } => EmitType::Toolchain, + SharedResource::InvocationSpecific { .. } => EmitType::InvocationSpecific, + }; + emit.contains(&kind) + } +} + +impl Context<'_> { + fn suffix_path(&self, filename: &str) -> PathBuf { + // We use splitn vs Path::extension here because we might get a filename + // like `style.min.css` and we want to process that into + // `style-suffix.min.css`. Path::extension would just return `css` + // which would result in `style.min-suffix.css` which isn't what we + // want. + let (base, ext) = filename.split_once('.').unwrap(); + let filename = format!("{}{}.{}", base, self.shared.resource_suffix, ext); + self.dst.join(&filename) + } + + fn write_shared( + &self, + resource: SharedResource<'_>, + contents: impl 'static + Send + AsRef<[u8]>, + emit: &[EmitType], + ) -> Result<(), Error> { + if resource.should_emit(emit) { + self.shared.fs.write(resource.path(self), contents) + } else { + Ok(()) + } + } + + fn write_minify( + &self, + resource: SharedResource<'_>, + contents: impl 'static + Send + AsRef<str> + AsRef<[u8]>, + minify: bool, + emit: &[EmitType], + ) -> Result<(), Error> { + if minify { + let contents = contents.as_ref(); + let contents = if resource.extension() == Some(OsStr::new("css")) { + minifier::css::minify(contents) + .map_err(|e| { + Error::new(format!("failed to minify CSS file: {}", e), resource.path(self)) + })? + .to_string() + } else { + minifier::js::minify(contents).to_string() + }; + self.write_shared(resource, contents, emit) + } else { + self.write_shared(resource, contents, emit) + } + } +} + +pub(super) fn write_shared( + cx: &mut Context<'_>, + krate: &Crate, + search_index: String, + options: &RenderOptions, +) -> Result<(), Error> { + // Write out the shared files. Note that these are shared among all rustdoc + // docs placed in the output directory, so this needs to be a synchronized + // operation with respect to all other rustdocs running around. + let lock_file = cx.dst.join(".lock"); + let _lock = try_err!(flock::Lock::new(&lock_file, true, true, true), &lock_file); + + // Minified resources are usually toolchain resources. If they're not, they should use `cx.write_minify` directly. + fn write_minify( + basename: &'static str, + contents: impl 'static + Send + AsRef<str> + AsRef<[u8]>, + cx: &Context<'_>, + options: &RenderOptions, + ) -> Result<(), Error> { + cx.write_minify( + SharedResource::ToolchainSpecific { basename }, + contents, + options.enable_minification, + &options.emit, + ) + } + + // Toolchain resources should never be dynamic. + let write_toolchain = |p: &'static _, c: &'static _| { + cx.write_shared(SharedResource::ToolchainSpecific { basename: p }, c, &options.emit) + }; + + // Crate resources should always be dynamic. + let write_crate = |p: &_, make_content: &dyn Fn() -> Result<Vec<u8>, Error>| { + let content = make_content()?; + cx.write_shared(SharedResource::InvocationSpecific { basename: p }, content, &options.emit) + }; + + // Given "foo.svg", return e.g. "url(\"foo1.58.0.svg\")" + fn ver_url(cx: &Context<'_>, basename: &'static str) -> String { + format!( + "url(\"{}\")", + SharedResource::ToolchainSpecific { basename } + .path(cx) + .file_name() + .unwrap() + .to_str() + .unwrap() + ) + } + + // We use the AUTOREPLACE mechanism to inject into our static JS and CSS certain + // values that are only known at doc build time. Since this mechanism is somewhat + // surprising when reading the code, please limit it to rustdoc.css. + write_minify( + "rustdoc.css", + static_files::RUSTDOC_CSS + .replace( + "/* AUTOREPLACE: */url(\"toggle-minus.svg\")", + &ver_url(cx, "toggle-minus.svg"), + ) + .replace("/* AUTOREPLACE: */url(\"toggle-plus.svg\")", &ver_url(cx, "toggle-plus.svg")) + .replace("/* AUTOREPLACE: */url(\"down-arrow.svg\")", &ver_url(cx, "down-arrow.svg")), + cx, + options, + )?; + + // Add all the static files. These may already exist, but we just + // overwrite them anyway to make sure that they're fresh and up-to-date. + write_minify("settings.css", static_files::SETTINGS_CSS, cx, options)?; + write_minify("noscript.css", static_files::NOSCRIPT_CSS, cx, options)?; + + // To avoid "light.css" to be overwritten, we'll first run over the received themes and only + // then we'll run over the "official" styles. + let mut themes: FxHashSet<String> = FxHashSet::default(); + + for entry in &cx.shared.style_files { + let theme = entry.basename()?; + let extension = + try_none!(try_none!(entry.path.extension(), &entry.path).to_str(), &entry.path); + + // Handle the official themes + match theme.as_str() { + "light" => write_minify("light.css", static_files::themes::LIGHT, cx, options)?, + "dark" => write_minify("dark.css", static_files::themes::DARK, cx, options)?, + "ayu" => write_minify("ayu.css", static_files::themes::AYU, cx, options)?, + _ => { + // Handle added third-party themes + let filename = format!("{}.{}", theme, extension); + write_crate(&filename, &|| Ok(try_err!(fs::read(&entry.path), &entry.path)))?; + } + }; + + themes.insert(theme.to_owned()); + } + + if (*cx.shared).layout.logo.is_empty() { + write_toolchain("rust-logo.svg", static_files::RUST_LOGO_SVG)?; + } + if (*cx.shared).layout.favicon.is_empty() { + write_toolchain("favicon.svg", static_files::RUST_FAVICON_SVG)?; + write_toolchain("favicon-16x16.png", static_files::RUST_FAVICON_PNG_16)?; + write_toolchain("favicon-32x32.png", static_files::RUST_FAVICON_PNG_32)?; + } + write_toolchain("wheel.svg", static_files::WHEEL_SVG)?; + write_toolchain("clipboard.svg", static_files::CLIPBOARD_SVG)?; + write_toolchain("down-arrow.svg", static_files::DOWN_ARROW_SVG)?; + write_toolchain("toggle-minus.svg", static_files::TOGGLE_MINUS_PNG)?; + write_toolchain("toggle-plus.svg", static_files::TOGGLE_PLUS_PNG)?; + + let mut themes: Vec<&String> = themes.iter().collect(); + themes.sort(); + + write_minify("main.js", static_files::MAIN_JS, cx, options)?; + write_minify("search.js", static_files::SEARCH_JS, cx, options)?; + write_minify("settings.js", static_files::SETTINGS_JS, cx, options)?; + + if cx.include_sources { + write_minify("source-script.js", static_files::sidebar::SOURCE_SCRIPT, cx, options)?; + } + + write_minify("storage.js", static_files::STORAGE_JS, cx, options)?; + + if cx.shared.layout.scrape_examples_extension { + cx.write_minify( + SharedResource::InvocationSpecific { basename: "scrape-examples.js" }, + static_files::SCRAPE_EXAMPLES_JS, + options.enable_minification, + &options.emit, + )?; + } + + if let Some(ref css) = cx.shared.layout.css_file_extension { + let buffer = try_err!(fs::read_to_string(css), css); + // This varies based on the invocation, so it can't go through the write_minify wrapper. + cx.write_minify( + SharedResource::InvocationSpecific { basename: "theme.css" }, + buffer, + options.enable_minification, + &options.emit, + )?; + } + write_minify("normalize.css", static_files::NORMALIZE_CSS, cx, options)?; + for (name, contents) in &*FILES_UNVERSIONED { + cx.write_shared(SharedResource::Unversioned { name }, contents, &options.emit)?; + } + + fn collect(path: &Path, krate: &str, key: &str) -> io::Result<(Vec<String>, Vec<String>)> { + let mut ret = Vec::new(); + let mut krates = Vec::new(); + + if path.exists() { + let prefix = format!(r#"{}["{}"]"#, key, krate); + for line in BufReader::new(File::open(path)?).lines() { + let line = line?; + if !line.starts_with(key) { + continue; + } + if line.starts_with(&prefix) { + continue; + } + ret.push(line.to_string()); + krates.push( + line[key.len() + 2..] + .split('"') + .next() + .map(|s| s.to_owned()) + .unwrap_or_else(String::new), + ); + } + } + Ok((ret, krates)) + } + + fn collect_json(path: &Path, krate: &str) -> io::Result<(Vec<String>, Vec<String>)> { + let mut ret = Vec::new(); + let mut krates = Vec::new(); + + if path.exists() { + let prefix = format!("\"{}\"", krate); + for line in BufReader::new(File::open(path)?).lines() { + let line = line?; + if !line.starts_with('"') { + continue; + } + if line.starts_with(&prefix) { + continue; + } + if line.ends_with(",\\") { + ret.push(line[..line.len() - 2].to_string()); + } else { + // Ends with "\\" (it's the case for the last added crate line) + ret.push(line[..line.len() - 1].to_string()); + } + krates.push( + line.split('"') + .find(|s| !s.is_empty()) + .map(|s| s.to_owned()) + .unwrap_or_else(String::new), + ); + } + } + Ok((ret, krates)) + } + + use std::ffi::OsString; + + #[derive(Debug)] + struct Hierarchy { + elem: OsString, + children: FxHashMap<OsString, Hierarchy>, + elems: FxHashSet<OsString>, + } + + impl Hierarchy { + fn new(elem: OsString) -> Hierarchy { + Hierarchy { elem, children: FxHashMap::default(), elems: FxHashSet::default() } + } + + fn to_json_string(&self) -> String { + let mut subs: Vec<&Hierarchy> = self.children.values().collect(); + subs.sort_unstable_by(|a, b| a.elem.cmp(&b.elem)); + let mut files = self + .elems + .iter() + .map(|s| format!("\"{}\"", s.to_str().expect("invalid osstring conversion"))) + .collect::<Vec<_>>(); + files.sort_unstable(); + let subs = subs.iter().map(|s| s.to_json_string()).collect::<Vec<_>>().join(","); + let dirs = if subs.is_empty() && files.is_empty() { + String::new() + } else { + format!(",[{}]", subs) + }; + let files = files.join(","); + let files = if files.is_empty() { String::new() } else { format!(",[{}]", files) }; + format!( + "[\"{name}\"{dirs}{files}]", + name = self.elem.to_str().expect("invalid osstring conversion"), + dirs = dirs, + files = files + ) + } + } + + if cx.include_sources { + let mut hierarchy = Hierarchy::new(OsString::new()); + for source in cx + .shared + .local_sources + .iter() + .filter_map(|p| p.0.strip_prefix(&cx.shared.src_root).ok()) + { + let mut h = &mut hierarchy; + let mut elems = source + .components() + .filter_map(|s| match s { + Component::Normal(s) => Some(s.to_owned()), + _ => None, + }) + .peekable(); + loop { + let cur_elem = elems.next().expect("empty file path"); + if elems.peek().is_none() { + h.elems.insert(cur_elem); + break; + } else { + let e = cur_elem.clone(); + h = h.children.entry(cur_elem.clone()).or_insert_with(|| Hierarchy::new(e)); + } + } + } + + let dst = cx.dst.join(&format!("source-files{}.js", cx.shared.resource_suffix)); + let make_sources = || { + let (mut all_sources, _krates) = + try_err!(collect_json(&dst, krate.name(cx.tcx()).as_str()), &dst); + all_sources.push(format!( + r#""{}":{}"#, + &krate.name(cx.tcx()), + hierarchy + .to_json_string() + // All these `replace` calls are because we have to go through JS string for JSON content. + .replace('\\', r"\\") + .replace('\'', r"\'") + // We need to escape double quotes for the JSON. + .replace("\\\"", "\\\\\"") + )); + all_sources.sort(); + let mut v = String::from("var sourcesIndex = JSON.parse('{\\\n"); + v.push_str(&all_sources.join(",\\\n")); + v.push_str("\\\n}');\ncreateSourceSidebar();\n"); + Ok(v.into_bytes()) + }; + write_crate("source-files.js", &make_sources)?; + } + + // Update the search index and crate list. + let dst = cx.dst.join(&format!("search-index{}.js", cx.shared.resource_suffix)); + let (mut all_indexes, mut krates) = + try_err!(collect_json(&dst, krate.name(cx.tcx()).as_str()), &dst); + all_indexes.push(search_index); + krates.push(krate.name(cx.tcx()).to_string()); + krates.sort(); + + // Sort the indexes by crate so the file will be generated identically even + // with rustdoc running in parallel. + all_indexes.sort(); + write_crate("search-index.js", &|| { + let mut v = String::from("var searchIndex = JSON.parse('{\\\n"); + v.push_str(&all_indexes.join(",\\\n")); + v.push_str( + r#"\ +}'); +if (typeof window !== 'undefined' && window.initSearch) {window.initSearch(searchIndex)}; +if (typeof exports !== 'undefined') {exports.searchIndex = searchIndex}; +"#, + ); + Ok(v.into_bytes()) + })?; + + write_crate("crates.js", &|| { + let krates = krates.iter().map(|k| format!("\"{}\"", k)).join(","); + Ok(format!("window.ALL_CRATES = [{}];", krates).into_bytes()) + })?; + + if options.enable_index_page { + if let Some(index_page) = options.index_page.clone() { + let mut md_opts = options.clone(); + md_opts.output = cx.dst.clone(); + md_opts.external_html = (*cx.shared).layout.external_html.clone(); + + crate::markdown::render(&index_page, md_opts, cx.shared.edition()) + .map_err(|e| Error::new(e, &index_page))?; + } else { + let shared = Rc::clone(&cx.shared); + let dst = cx.dst.join("index.html"); + let page = layout::Page { + title: "Index of crates", + css_class: "mod", + root_path: "./", + static_root_path: shared.static_root_path.as_deref(), + description: "List of crates", + keywords: BASIC_KEYWORDS, + resource_suffix: &shared.resource_suffix, + }; + + let content = format!( + "<h1 class=\"fqn\">\ + <span class=\"in-band\">List of all crates</span>\ + </h1><ul class=\"crate mod\">{}</ul>", + krates + .iter() + .map(|s| { + format!( + "<li><a class=\"crate mod\" href=\"{}index.html\">{}</a></li>", + ensure_trailing_slash(s), + s + ) + }) + .collect::<String>() + ); + let v = layout::render(&shared.layout, &page, "", content, &shared.style_files); + shared.fs.write(dst, v)?; + } + } + + // Update the list of all implementors for traits + let dst = cx.dst.join("implementors"); + let cache = cx.cache(); + for (&did, imps) in &cache.implementors { + // Private modules can leak through to this phase of rustdoc, which + // could contain implementations for otherwise private types. In some + // rare cases we could find an implementation for an item which wasn't + // indexed, so we just skip this step in that case. + // + // FIXME: this is a vague explanation for why this can't be a `get`, in + // theory it should be... + let (remote_path, remote_item_type) = match cache.exact_paths.get(&did) { + Some(p) => match cache.paths.get(&did).or_else(|| cache.external_paths.get(&did)) { + Some((_, t)) => (p, t), + None => continue, + }, + None => match cache.external_paths.get(&did) { + Some((p, t)) => (p, t), + None => continue, + }, + }; + + #[derive(Serialize)] + struct Implementor { + text: String, + synthetic: bool, + types: Vec<String>, + } + + let implementors = imps + .iter() + .filter_map(|imp| { + // If the trait and implementation are in the same crate, then + // there's no need to emit information about it (there's inlining + // going on). If they're in different crates then the crate defining + // the trait will be interested in our implementation. + // + // If the implementation is from another crate then that crate + // should add it. + if imp.impl_item.item_id.krate() == did.krate || !imp.impl_item.item_id.is_local() { + None + } else { + Some(Implementor { + text: imp.inner_impl().print(false, cx).to_string(), + synthetic: imp.inner_impl().kind.is_auto(), + types: collect_paths_for_type(imp.inner_impl().for_.clone(), cache), + }) + } + }) + .collect::<Vec<_>>(); + + // Only create a js file if we have impls to add to it. If the trait is + // documented locally though we always create the file to avoid dead + // links. + if implementors.is_empty() && !cache.paths.contains_key(&did) { + continue; + } + + let implementors = format!( + r#"implementors["{}"] = {};"#, + krate.name(cx.tcx()), + serde_json::to_string(&implementors).unwrap() + ); + + let mut mydst = dst.clone(); + for part in &remote_path[..remote_path.len() - 1] { + mydst.push(part.to_string()); + } + cx.shared.ensure_dir(&mydst)?; + mydst.push(&format!("{}.{}.js", remote_item_type, remote_path[remote_path.len() - 1])); + + let (mut all_implementors, _) = + try_err!(collect(&mydst, krate.name(cx.tcx()).as_str(), "implementors"), &mydst); + all_implementors.push(implementors); + // Sort the implementors by crate so the file will be generated + // identically even with rustdoc running in parallel. + all_implementors.sort(); + + let mut v = String::from("(function() {var implementors = {};\n"); + for implementor in &all_implementors { + writeln!(v, "{}", *implementor).unwrap(); + } + v.push_str( + "if (window.register_implementors) {\ + window.register_implementors(implementors);\ + } else {\ + window.pending_implementors = implementors;\ + }", + ); + v.push_str("})()"); + cx.shared.fs.write(mydst, v)?; + } + Ok(()) +} diff --git a/src/librustdoc/html/sources.rs b/src/librustdoc/html/sources.rs new file mode 100644 index 000000000..d0fd637ba --- /dev/null +++ b/src/librustdoc/html/sources.rs @@ -0,0 +1,303 @@ +use crate::clean; +use crate::docfs::PathError; +use crate::error::Error; +use crate::html::format::Buffer; +use crate::html::highlight; +use crate::html::layout; +use crate::html::render::{Context, BASIC_KEYWORDS}; +use crate::visit::DocVisitor; + +use rustc_data_structures::fx::{FxHashMap, FxHashSet}; +use rustc_hir::def_id::LOCAL_CRATE; +use rustc_middle::ty::TyCtxt; +use rustc_session::Session; +use rustc_span::edition::Edition; +use rustc_span::source_map::FileName; + +use std::ffi::OsStr; +use std::fs; +use std::path::{Component, Path, PathBuf}; +use std::rc::Rc; + +pub(crate) fn render(cx: &mut Context<'_>, krate: &clean::Crate) -> Result<(), Error> { + info!("emitting source files"); + + let dst = cx.dst.join("src").join(krate.name(cx.tcx()).as_str()); + cx.shared.ensure_dir(&dst)?; + + let mut collector = SourceCollector { dst, cx, emitted_local_sources: FxHashSet::default() }; + collector.visit_crate(krate); + Ok(()) +} + +pub(crate) fn collect_local_sources<'tcx>( + tcx: TyCtxt<'tcx>, + src_root: &Path, + krate: &clean::Crate, +) -> FxHashMap<PathBuf, String> { + let mut lsc = LocalSourcesCollector { tcx, local_sources: FxHashMap::default(), src_root }; + lsc.visit_crate(krate); + lsc.local_sources +} + +struct LocalSourcesCollector<'a, 'tcx> { + tcx: TyCtxt<'tcx>, + local_sources: FxHashMap<PathBuf, String>, + src_root: &'a Path, +} + +fn is_real_and_local(span: clean::Span, sess: &Session) -> bool { + span.cnum(sess) == LOCAL_CRATE && span.filename(sess).is_real() +} + +impl LocalSourcesCollector<'_, '_> { + fn add_local_source(&mut self, item: &clean::Item) { + let sess = self.tcx.sess; + let span = item.span(self.tcx); + // skip all synthetic "files" + if !is_real_and_local(span, sess) { + return; + } + let filename = span.filename(sess); + let p = if let FileName::Real(file) = filename { + match file.into_local_path() { + Some(p) => p, + None => return, + } + } else { + return; + }; + if self.local_sources.contains_key(&*p) { + // We've already emitted this source + return; + } + + let mut href = String::new(); + clean_path(self.src_root, &p, false, |component| { + href.push_str(&component.to_string_lossy()); + href.push('/'); + }); + + let mut src_fname = p.file_name().expect("source has no filename").to_os_string(); + src_fname.push(".html"); + href.push_str(&src_fname.to_string_lossy()); + self.local_sources.insert(p, href); + } +} + +impl DocVisitor for LocalSourcesCollector<'_, '_> { + fn visit_item(&mut self, item: &clean::Item) { + self.add_local_source(item); + + self.visit_item_recur(item) + } +} + +/// Helper struct to render all source code to HTML pages +struct SourceCollector<'a, 'tcx> { + cx: &'a mut Context<'tcx>, + + /// Root destination to place all HTML output into + dst: PathBuf, + emitted_local_sources: FxHashSet<PathBuf>, +} + +impl DocVisitor for SourceCollector<'_, '_> { + fn visit_item(&mut self, item: &clean::Item) { + if !self.cx.include_sources { + return; + } + + let tcx = self.cx.tcx(); + let span = item.span(tcx); + let sess = tcx.sess; + + // If we're not rendering sources, there's nothing to do. + // If we're including source files, and we haven't seen this file yet, + // then we need to render it out to the filesystem. + if is_real_and_local(span, sess) { + let filename = span.filename(sess); + let span = span.inner(); + let pos = sess.source_map().lookup_source_file(span.lo()); + let file_span = span.with_lo(pos.start_pos).with_hi(pos.end_pos); + // If it turns out that we couldn't read this file, then we probably + // can't read any of the files (generating html output from json or + // something like that), so just don't include sources for the + // entire crate. The other option is maintaining this mapping on a + // per-file basis, but that's probably not worth it... + self.cx.include_sources = match self.emit_source(&filename, file_span) { + Ok(()) => true, + Err(e) => { + self.cx.shared.tcx.sess.span_err( + span, + &format!( + "failed to render source code for `{}`: {}", + filename.prefer_local(), + e, + ), + ); + false + } + }; + } + + self.visit_item_recur(item) + } +} + +impl SourceCollector<'_, '_> { + /// Renders the given filename into its corresponding HTML source file. + fn emit_source( + &mut self, + filename: &FileName, + file_span: rustc_span::Span, + ) -> Result<(), Error> { + let p = match *filename { + FileName::Real(ref file) => { + if let Some(local_path) = file.local_path() { + local_path.to_path_buf() + } else { + unreachable!("only the current crate should have sources emitted"); + } + } + _ => return Ok(()), + }; + if self.emitted_local_sources.contains(&*p) { + // We've already emitted this source + return Ok(()); + } + + let contents = match fs::read_to_string(&p) { + Ok(contents) => contents, + Err(e) => { + return Err(Error::new(e, &p)); + } + }; + + // Remove the utf-8 BOM if any + let contents = contents.strip_prefix('\u{feff}').unwrap_or(&contents); + + let shared = Rc::clone(&self.cx.shared); + // Create the intermediate directories + let mut cur = self.dst.clone(); + let mut root_path = String::from("../../"); + clean_path(&shared.src_root, &p, false, |component| { + cur.push(component); + root_path.push_str("../"); + }); + + shared.ensure_dir(&cur)?; + + let src_fname = p.file_name().expect("source has no filename").to_os_string(); + let mut fname = src_fname.clone(); + fname.push(".html"); + cur.push(&fname); + + let title = format!("{} - source", src_fname.to_string_lossy()); + let desc = format!("Source of the Rust file `{}`.", filename.prefer_remapped()); + let page = layout::Page { + title: &title, + css_class: "source", + root_path: &root_path, + static_root_path: shared.static_root_path.as_deref(), + description: &desc, + keywords: BASIC_KEYWORDS, + resource_suffix: &shared.resource_suffix, + }; + let v = layout::render( + &shared.layout, + &page, + "", + |buf: &mut _| { + let cx = &mut self.cx; + print_src( + buf, + contents, + cx.shared.edition(), + file_span, + cx, + &root_path, + None, + SourceContext::Standalone, + ) + }, + &shared.style_files, + ); + shared.fs.write(cur, v)?; + self.emitted_local_sources.insert(p); + Ok(()) + } +} + +/// Takes a path to a source file and cleans the path to it. This canonicalizes +/// things like ".." to components which preserve the "top down" hierarchy of a +/// static HTML tree. Each component in the cleaned path will be passed as an +/// argument to `f`. The very last component of the path (ie the file name) will +/// be passed to `f` if `keep_filename` is true, and ignored otherwise. +pub(crate) fn clean_path<F>(src_root: &Path, p: &Path, keep_filename: bool, mut f: F) +where + F: FnMut(&OsStr), +{ + // make it relative, if possible + let p = p.strip_prefix(src_root).unwrap_or(p); + + let mut iter = p.components().peekable(); + + while let Some(c) = iter.next() { + if !keep_filename && iter.peek().is_none() { + break; + } + + match c { + Component::ParentDir => f("up".as_ref()), + Component::Normal(c) => f(c), + _ => continue, + } + } +} + +pub(crate) enum SourceContext { + Standalone, + Embedded { offset: usize }, +} + +/// Wrapper struct to render the source code of a file. This will do things like +/// adding line numbers to the left-hand side. +pub(crate) fn print_src( + buf: &mut Buffer, + s: &str, + edition: Edition, + file_span: rustc_span::Span, + context: &Context<'_>, + root_path: &str, + decoration_info: Option<highlight::DecorationInfo>, + source_context: SourceContext, +) { + let lines = s.lines().count(); + let mut line_numbers = Buffer::empty_from(buf); + line_numbers.write_str("<pre class=\"line-numbers\">"); + match source_context { + SourceContext::Standalone => { + for line in 1..=lines { + writeln!(line_numbers, "<span id=\"{0}\">{0}</span>", line) + } + } + SourceContext::Embedded { offset } => { + for line in 1..=lines { + writeln!(line_numbers, "<span>{0}</span>", line + offset) + } + } + } + line_numbers.write_str("</pre>"); + highlight::render_with_highlighting( + s, + buf, + None, + None, + None, + edition, + Some(line_numbers), + Some(highlight::HrefContext { context, file_span, root_path }), + decoration_info, + ); +} diff --git a/src/librustdoc/html/static/.eslintrc.js b/src/librustdoc/html/static/.eslintrc.js new file mode 100644 index 000000000..fcd925bb3 --- /dev/null +++ b/src/librustdoc/html/static/.eslintrc.js @@ -0,0 +1,96 @@ +module.exports = { + "env": { + "browser": true, + "es6": true + }, + "extends": "eslint:recommended", + "parserOptions": { + "ecmaVersion": 2015, + "sourceType": "module" + }, + "rules": { + "linebreak-style": [ + "error", + "unix" + ], + "semi": [ + "error", + "always" + ], + "quotes": [ + "error", + "double" + ], + "linebreak-style": [ + "error", + "unix" + ], + "no-trailing-spaces": "error", + "no-var": ["error"], + "prefer-const": ["error"], + "prefer-arrow-callback": ["error"], + "brace-style": [ + "error", + "1tbs", + { "allowSingleLine": false } + ], + "keyword-spacing": [ + "error", + { "before": true, "after": true } + ], + "arrow-spacing": [ + "error", + { "before": true, "after": true } + ], + "key-spacing": [ + "error", + { "beforeColon": false, "afterColon": true, "mode": "strict" } + ], + "func-call-spacing": ["error", "never"], + "space-infix-ops": "error", + "space-before-function-paren": ["error", "never"], + "space-before-blocks": "error", + "comma-dangle": ["error", "always-multiline"], + "comma-style": ["error", "last"], + "max-len": ["error", { "code": 100, "tabWidth": 4 }], + "eol-last": ["error", "always"], + "arrow-parens": ["error", "as-needed"], + "no-unused-vars": [ + "error", + { + "argsIgnorePattern": "^_", + "varsIgnorePattern": "^_" + } + ], + "eqeqeq": "error", + "no-const-assign": "error", + "no-debugger": "error", + "no-dupe-args": "error", + "no-dupe-else-if": "error", + "no-dupe-keys": "error", + "no-duplicate-case": "error", + "no-ex-assign": "error", + "no-fallthrough": "error", + "no-invalid-regexp": "error", + "no-import-assign": "error", + "no-self-compare": "error", + "no-template-curly-in-string": "error", + "block-scoped-var": "error", + "guard-for-in": "error", + "no-alert": "error", + "no-confusing-arrow": "error", + "no-div-regex": "error", + "no-floating-decimal": "error", + "no-implicit-globals": "error", + "no-implied-eval": "error", + "no-label-var": "error", + "no-lonely-if": "error", + "no-mixed-operators": "error", + "no-multi-assign": "error", + "no-return-assign": "error", + "no-script-url": "error", + "no-sequences": "error", + "no-throw-literal": "error", + "no-div-regex": "error", + } +}; diff --git a/src/librustdoc/html/static/COPYRIGHT.txt b/src/librustdoc/html/static/COPYRIGHT.txt new file mode 100644 index 000000000..34e48134c --- /dev/null +++ b/src/librustdoc/html/static/COPYRIGHT.txt @@ -0,0 +1,46 @@ +These documentation pages include resources by third parties. This copyright +file applies only to those resources. The following third party resources are +included, and carry their own copyright notices and license terms: + +* Fira Sans (FiraSans-Regular.woff2, FiraSans-Medium.woff2): + + Copyright (c) 2014, Mozilla Foundation https://mozilla.org/ + with Reserved Font Name Fira Sans. + + Copyright (c) 2014, Telefonica S.A. + + Licensed under the SIL Open Font License, Version 1.1. + See FiraSans-LICENSE.txt. + +* rustdoc.css, main.js, and playpen.js: + + Copyright 2015 The Rust Developers. + Licensed under the Apache License, Version 2.0 (see LICENSE-APACHE.txt) or + the MIT license (LICENSE-MIT.txt) at your option. + +* normalize.css: + + Copyright (c) Nicolas Gallagher and Jonathan Neal. + Licensed under the MIT license (see LICENSE-MIT.txt). + +* Source Code Pro (SourceCodePro-Regular.ttf.woff2, + SourceCodePro-Semibold.ttf.woff2, SourceCodePro-It.ttf.woff2): + + Copyright 2010, 2012 Adobe Systems Incorporated (http://www.adobe.com/), + with Reserved Font Name 'Source'. All Rights Reserved. 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Source is a trademark of Adobe in the United + States and/or other countries. + + Licensed under the SIL Open Font License, Version 1.1. + See SourceSerif4-LICENSE.md. + +This copyright file is intended to be distributed with rustdoc output. diff --git a/src/librustdoc/html/static/LICENSE-APACHE.txt b/src/librustdoc/html/static/LICENSE-APACHE.txt new file mode 100644 index 000000000..16fe87b06 --- /dev/null +++ b/src/librustdoc/html/static/LICENSE-APACHE.txt @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + +TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + +1. 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IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. diff --git a/src/librustdoc/html/static/css/normalize.css b/src/librustdoc/html/static/css/normalize.css new file mode 100644 index 000000000..fdb8a8c65 --- /dev/null +++ b/src/librustdoc/html/static/css/normalize.css @@ -0,0 +1,2 @@ +/* ignore-tidy-linelength */ +/*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */ html{line-height:1.15;-webkit-text-size-adjust:100%}body{margin:0}main{display:block}h1{font-size:2em;margin:0.67em 0}hr{box-sizing:content-box;height:0;overflow:visible}pre{font-family:monospace, monospace;font-size:1em}a{background-color:transparent}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}b,strong{font-weight:bolder}code,kbd,samp{font-family:monospace, monospace;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-0.25em}sup{top:-0.5em}img{border-style:none}button,input,optgroup,select,textarea{font-family:inherit;font-size:100%;line-height:1.15;margin:0}button,input{overflow:visible}button,select{text-transform:none}[type="button"],[type="reset"],[type="submit"],button{-webkit-appearance:button}[type="button"]::-moz-focus-inner,[type="reset"]::-moz-focus-inner,[type="submit"]::-moz-focus-inner,button::-moz-focus-inner{border-style:none;padding:0}[type="button"]:-moz-focusring,[type="reset"]:-moz-focusring,[type="submit"]:-moz-focusring,button:-moz-focusring{outline:1px dotted ButtonText}fieldset{padding:0.35em 0.75em 0.625em}legend{box-sizing:border-box;color:inherit;display:table;max-width:100%;padding:0;white-space:normal}progress{vertical-align:baseline}textarea{overflow:auto}[type="checkbox"],[type="radio"]{box-sizing:border-box;padding:0}[type="number"]::-webkit-inner-spin-button,[type="number"]::-webkit-outer-spin-button{height:auto}[type="search"]{-webkit-appearance:textfield;outline-offset:-2px}[type="search"]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}details{display:block}summary{display:list-item}template{display:none}[hidden]{display:none} diff --git a/src/librustdoc/html/static/css/noscript.css b/src/librustdoc/html/static/css/noscript.css new file mode 100644 index 000000000..0a19a99ab --- /dev/null +++ b/src/librustdoc/html/static/css/noscript.css @@ -0,0 +1,20 @@ +/* +This whole CSS file is used only in case rustdoc is rendered with javascript disabled. Since a lot +of content is hidden by default (depending on the settings too), we have to overwrite some of the +rules. +*/ + +#main-content .attributes { + /* Since there is no toggle (the "[-]") when JS is disabled, no need for this margin either. */ + margin-left: 0 !important; +} + +#copy-path { + /* It requires JS to work so no need to display it in this case. */ + display: none; +} + +.sub { + /* The search bar and related controls don't work without JS */ + display: none; +} diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css new file mode 100644 index 000000000..83fe14550 --- /dev/null +++ b/src/librustdoc/html/static/css/rustdoc.css @@ -0,0 +1,2335 @@ +/* See FiraSans-LICENSE.txt for the Fira Sans license. */ +@font-face { + font-family: 'Fira Sans'; + font-style: normal; + font-weight: 400; + src: local('Fira Sans'), + url("FiraSans-Regular.woff2") format("woff2"); + font-display: swap; +} +@font-face { + font-family: 'Fira Sans'; + font-style: normal; + font-weight: 500; + src: local('Fira Sans Medium'), + url("FiraSans-Medium.woff2") format("woff2"); + font-display: swap; +} + +/* See SourceSerif4-LICENSE.md for the Source Serif 4 license. */ +@font-face { + font-family: 'Source Serif 4'; + font-style: normal; + font-weight: 400; + src: local('Source Serif 4'), + url("SourceSerif4-Regular.ttf.woff2") format("woff2"); + font-display: swap; +} +@font-face { + font-family: 'Source Serif 4'; + font-style: italic; + font-weight: 400; + src: local('Source Serif 4 Italic'), + url("SourceSerif4-It.ttf.woff2") format("woff2"); + font-display: swap; +} +@font-face { + font-family: 'Source Serif 4'; + font-style: normal; + font-weight: 700; + src: local('Source Serif 4 Bold'), + url("SourceSerif4-Bold.ttf.woff2") format("woff2"); + font-display: swap; +} + +/* See SourceCodePro-LICENSE.txt for the Source Code Pro license. */ +@font-face { + font-family: 'Source Code Pro'; + font-style: normal; + font-weight: 400; + /* Avoid using locally installed font because bad versions are in circulation: + * see https://github.com/rust-lang/rust/issues/24355 */ + src: url("SourceCodePro-Regular.ttf.woff2") format("woff2"); + font-display: swap; +} +@font-face { + font-family: 'Source Code Pro'; + font-style: italic; + font-weight: 400; + src: url("SourceCodePro-It.ttf.woff2") format("woff2"); + font-display: swap; +} +@font-face { + font-family: 'Source Code Pro'; + font-style: normal; + font-weight: 600; + src: url("SourceCodePro-Semibold.ttf.woff2") format("woff2"); + font-display: swap; +} + +/* Avoid using legacy CJK serif fonts in Windows like Batang. */ +@font-face { + font-family: 'NanumBarunGothic'; + src: url("NanumBarunGothic.ttf.woff2") format("woff2"); + font-display: swap; + unicode-range: U+AC00-D7AF, U+1100-11FF, U+3130-318F, U+A960-A97F, U+D7B0-D7FF; +} + +* { + -webkit-box-sizing: border-box; + -moz-box-sizing: border-box; + box-sizing: border-box; +} + +/* This part handles the "default" theme being used depending on the system one. */ +html { + content: ""; +} +@media (prefers-color-scheme: light) { + html { + content: "light"; + } +} +@media (prefers-color-scheme: dark) { + html { + content: "dark"; + } +} + +/* General structure and fonts */ + +body { + /* Line spacing at least 1.5 per Web Content Accessibility Guidelines + https://www.w3.org/WAI/WCAG21/Understanding/visual-presentation.html */ + font: 1rem/1.5 "Source Serif 4", NanumBarunGothic, serif; + margin: 0; + position: relative; + /* We use overflow-wrap: break-word for Safari, which doesn't recognize + `anywhere`: https://developer.mozilla.org/en-US/docs/Web/CSS/overflow-wrap */ + overflow-wrap: break-word; + /* Then override it with `anywhere`, which is required to make non-Safari browsers break + more aggressively when we want them to. */ + overflow-wrap: anywhere; + + -webkit-font-feature-settings: "kern", "liga"; + -moz-font-feature-settings: "kern", "liga"; + font-feature-settings: "kern", "liga"; + + background-color: var(--main-background-color); + color: var(--main-color); +} + +h1 { + font-size: 1.5rem; /* 24px */ +} +h2 { + font-size: 1.375rem; /* 22px */ +} +h3 { + font-size: 1.25rem; /* 20px */ +} +h1, h2, h3, h4, h5, h6 { + font-weight: 500; +} +h1, h2, h3, h4 { + margin: 20px 0 15px 0; + padding-bottom: 6px; +} +.docblock h3, .docblock h4, h5, h6 { + margin: 15px 0 5px 0; +} +h1.fqn { + margin: 0; + padding: 0; + border-bottom-color: var(--headings-border-bottom-color); +} +h2, h3, h4 { + border-bottom-color: var(--headings-border-bottom-color); +} +.main-heading { + display: flex; + flex-wrap: wrap; + justify-content: space-between; + padding-bottom: 6px; + margin-bottom: 15px; +} +.main-heading a:hover { + text-decoration: underline; +} +#toggle-all-docs { + text-decoration: none; +} +/* The only headings that get underlines are: + Markdown-generated headings within the top-doc + Rustdoc-generated h2 section headings (e.g. "Implementations", "Required Methods", etc) + Underlines elsewhere in the documentation break up visual flow and tend to invert + section hierarchies. */ +h2, +.top-doc .docblock > h3, +.top-doc .docblock > h4 { + border-bottom: 1px solid var(--headings-border-bottom-color); +} +h3.code-header { + font-size: 1.125rem; /* 18px */ +} +h4.code-header { + font-size: 1rem; +} +.code-header { + font-weight: 600; + border-bottom-style: none; + margin: 0; + padding: 0; + margin-top: 0.6em; + margin-bottom: 0.4em; +} +.impl, +.impl-items .method, +.methods .method, +.impl-items .type, +.methods .type, +.impl-items .associatedconstant, +.methods .associatedconstant, +.impl-items .associatedtype, +.methods .associatedtype { + flex-basis: 100%; + font-weight: 600; + position: relative; +} + +div.impl-items > div { + padding-left: 0; +} + +h1, h2, h3, h4, h5, h6, +.sidebar, +.mobile-topbar, +a.source, +.search-input, +.search-results .result-name, +.content table td:first-child > a, +.item-left > a, +.out-of-band, +span.since, +#source-sidebar, #sidebar-toggle, +details.rustdoc-toggle > summary::before, +div.impl-items > div:not(.docblock):not(.item-info), +.content ul.crate a.crate, +a.srclink, +#main-content > .since, +#help-button > button, +details.rustdoc-toggle.top-doc > summary, +details.rustdoc-toggle.top-doc > summary::before, +details.rustdoc-toggle.non-exhaustive > summary, +details.rustdoc-toggle.non-exhaustive > summary::before, +.scraped-example-title, +.more-examples-toggle summary, .more-examples-toggle .hide-more, +.example-links a, +/* This selector is for the items listed in the "all items" page. */ +#main-content > ul.docblock > li > a { + font-family: "Fira Sans", Arial, NanumBarunGothic, sans-serif; +} + +h1, h2, h3, h4, +a#toggle-all-docs, +a.anchor, +.small-section-header a, +#source-sidebar a, +pre.rust a, +.sidebar h2 a, +.sidebar h3 a, +.mobile-topbar h2 a, +.in-band a, +.search-results a, +.module-item .stab, +.import-item .stab, +.result-name .primitive > i, .result-name .keyword > i, +.content .method .where, +.content .fn .where, +.content .where.fmt-newline { + color: var(--main-color); +} + +ol, ul { + padding-left: 24px; +} +ul ul, ol ul, ul ol, ol ol { + margin-bottom: .625em; +} + +p { + /* Paragraph spacing at least 1.5 times line spacing per Web Content Accessibility Guidelines. + Line-height is 1.5rem, so line spacing is .5rem; .75em is 1.5 times that. + https://www.w3.org/WAI/WCAG21/Understanding/visual-presentation.html */ + margin: 0 0 .75em 0; +} + +summary { + outline: none; +} + +/* Fix some style changes due to normalize.css 8 */ + +td, +th { + padding: 0; +} + +table { + border-collapse: collapse; +} + +button, +input, +optgroup, +select, +textarea { + color: inherit; + font: inherit; + margin: 0; +} + +button { + /* Buttons on Safari have different default padding than other platforms. Make them the same. */ + padding: 1px 6px; +} + +/* end tweaks for normalize.css 8 */ + +.rustdoc { + display: flex; + flex-direction: row; + flex-wrap: nowrap; +} + +main { + position: relative; + flex-grow: 1; + padding: 10px 15px 40px 45px; + min-width: 0; +} + +.source main { + padding: 15px; +} + +.width-limiter { + max-width: 960px; + margin-right: auto; +} + +.source .width-limiter { + max-width: unset; +} + +details:not(.rustdoc-toggle) summary { + margin-bottom: .6em; +} + +code, pre, a.test-arrow, .code-header { + font-family: "Source Code Pro", monospace; +} +.docblock code, .docblock-short code { + border-radius: 3px; + padding: 0 0.125em; +} +.docblock pre code, .docblock-short pre code { + padding: 0; +} +pre { + padding: 14px; +} +.docblock.item-decl { + margin-left: 0; +} +.item-decl pre { + overflow-x: auto; +} + +.source .content pre { + padding: 20px; +} + +img { + max-width: 100%; +} + +li { + position: relative; +} + +.source .content { + max-width: none; + overflow: visible; + margin-left: 0px; +} + +nav.sub { + position: relative; + font-size: 1rem; +} + +.sub-container { + display: flex; + flex-direction: row; + flex-wrap: nowrap; +} + +.sub-logo-container { + display: none; + margin-right: 20px; +} + +.source .sub-logo-container { + display: block; +} + +.source .sub-logo-container > img { + height: 60px; + width: 60px; + object-fit: contain; +} + +.sidebar, .mobile-topbar, .sidebar-menu-toggle { + background-color: var(--sidebar-background-color); +} + +.sidebar { + font-size: 0.875rem; + width: 250px; + min-width: 200px; + overflow-y: scroll; + position: sticky; + height: 100vh; + top: 0; + left: 0; +} + +.sidebar-elems, +.sidebar > .location { + padding-left: 24px; +} + +.sidebar .location { + overflow-wrap: anywhere; +} + +.rustdoc.source .sidebar { + width: 50px; + min-width: 0px; + max-width: 300px; + flex-grow: 0; + flex-shrink: 0; + flex-basis: auto; + border-right: 1px solid; + overflow-x: hidden; + /* The sidebar is by default hidden */ + overflow-y: hidden; +} + +.rustdoc.source .sidebar .sidebar-logo { + display: none; +} + +.source .sidebar, #sidebar-toggle, #source-sidebar { + background-color: var(--sidebar-background-color); +} + +#sidebar-toggle > button:hover, #sidebar-toggle > button:focus { + background-color: var(--sidebar-background-color-hover); +} + +.source .sidebar > *:not(#sidebar-toggle) { + opacity: 0; + visibility: hidden; +} + +.source-sidebar-expanded .source .sidebar { + overflow-y: auto; +} + +.source-sidebar-expanded .source .sidebar > *:not(#sidebar-toggle) { + opacity: 1; + visibility: visible; +} + +#all-types { + margin-top: 1em; +} + +/* Improve the scrollbar display on firefox */ +* { + scrollbar-width: initial; + scrollbar-color: var(--scrollbar-color); +} +.sidebar { + scrollbar-width: thin; + scrollbar-color: var(--scrollbar-color); +} + +/* Improve the scrollbar display on webkit-based browsers */ +::-webkit-scrollbar { + width: 12px; +} +.sidebar::-webkit-scrollbar { + width: 8px; +} +::-webkit-scrollbar-track { + -webkit-box-shadow: inset 0; + background-color: var(--scrollbar-track-background-color); +} +.sidebar::-webkit-scrollbar-track { + background-color: var(--scrollbar-track-background-color); +} +::-webkit-scrollbar-thumb, .sidebar::-webkit-scrollbar-thumb { + background-color: var(--scrollbar-thumb-background-color); +} + +/* Everything else */ + +.hidden { + display: none !important; +} + +.sidebar .logo-container { + display: flex; + margin-top: 10px; + margin-bottom: 10px; + justify-content: center; +} + +.version { + overflow-wrap: break-word; +} + +.logo-container > img { + height: 100px; + width: 100px; +} + +.location:empty { + border: none; +} + +.location a:first-of-type { + font-weight: 500; +} + +.block { + padding: 0; +} +.block ul, .block li { + padding: 0; + margin: 0; + list-style: none; +} + +.block a, +h2.location a { + display: block; + padding: 0.25rem; + margin-left: -0.25rem; + + text-overflow: ellipsis; + overflow: hidden; +} + +.sidebar h2 { + border-bottom: none; + font-weight: 500; + padding: 0; + margin: 0; + margin-top: 0.7rem; + margin-bottom: 0.7rem; +} + +.sidebar h3 { + font-size: 1.125rem; /* 18px */ + font-weight: 500; + padding: 0; + margin: 0; +} + +.sidebar-elems .block { + margin-bottom: 2em; +} + +.sidebar-elems .block li a { + white-space: nowrap; +} + +.mobile-topbar { + display: none; +} + +.source .content pre.rust { + white-space: pre; + overflow: auto; + padding-left: 0; +} + +.rustdoc .example-wrap { + display: inline-flex; + margin-bottom: 10px; +} + +.example-wrap { + position: relative; + width: 100%; +} + +.example-wrap > pre.line-number { + overflow: initial; + border: 1px solid; + padding: 13px 8px; + text-align: right; + border-top-left-radius: 5px; + border-bottom-left-radius: 5px; +} + +.example-wrap > pre.rust a:hover { + text-decoration: underline; +} + +.line-numbers { + text-align: right; +} +.rustdoc:not(.source) .example-wrap > pre:not(.line-number) { + width: 100%; + overflow-x: auto; +} + +.rustdoc:not(.source) .example-wrap > pre.line-numbers { + width: auto; + overflow-x: visible; +} + +.rustdoc .example-wrap > pre { + margin: 0; +} + +#search { + position: relative; +} + +.search-loading { + text-align: center; +} + +#results > table { + width: 100%; + table-layout: fixed; +} + +.content > .example-wrap pre.line-numbers { + position: relative; + -webkit-user-select: none; + -moz-user-select: none; + -ms-user-select: none; + user-select: none; +} +.line-numbers span { + cursor: pointer; +} + +.docblock-short { + overflow-wrap: break-word; + overflow-wrap: anywhere; +} +.docblock-short p { + display: inline; +} + +.docblock-short p { + overflow: hidden; + text-overflow: ellipsis; + margin: 0; +} +/* Wrap non-pre code blocks (`text`) but not (```text```). */ +.docblock > :not(pre) > code, +.docblock-short > :not(pre) > code { + white-space: pre-wrap; +} + +.top-doc .docblock h2 { font-size: 1.375rem; } +.top-doc .docblock h3 { font-size: 1.25rem; } +.top-doc .docblock h4, +.top-doc .docblock h5 { + font-size: 1.125rem; +} +.top-doc .docblock h6 { + font-size: 1rem; +} + +.docblock h5 { font-size: 1rem; } +.docblock h6 { font-size: 0.875rem; } +.docblock h1, .docblock h2, .docblock h3, .docblock h4, .docblock h5, .docblock h6 { + border-bottom-color: var(--headings-border-bottom-color); +} + +.docblock { + margin-left: 24px; + position: relative; +} + +.docblock > :not(.information):not(.more-examples-toggle) { + max-width: 100%; + overflow-x: auto; +} + +.content .out-of-band { + flex-grow: 0; + font-size: 1.125rem; + font-weight: normal; + float: right; +} + +.method > .code-header, .trait-impl > .code-header { + max-width: calc(100% - 41px); + display: block; +} + +.content .in-band { + flex-grow: 1; + margin: 0px; + padding: 0px; + overflow-wrap: break-word; + overflow-wrap: anywhere; +} + +.in-band > code, .in-band > .code-header { + display: inline-block; +} + +.docblock code, .docblock-short code, +pre, .rustdoc.source .example-wrap { + background-color: var(--code-block-background-color); +} + +#main-content { + position: relative; +} +#main-content > .since { + top: inherit; +} + +.content table:not(.table-display) { + border-spacing: 0 5px; +} +.content td { vertical-align: top; } +.content td:first-child { padding-right: 20px; } +.content td p:first-child { margin-top: 0; } +.content td h1, .content td h2 { margin-left: 0; font-size: 1.125rem; } +.content tr:first-child td { border-top: 0; } + +.docblock table { + margin: .5em 0; + width: calc(100% - 2px); + overflow-x: auto; + display: block; +} + +.docblock table td { + padding: .5em; + border: 1px dashed; +} + +.docblock table th { + padding: .5em; + text-align: left; + border: 1px solid; +} + +.fields + table { + margin-bottom: 1em; +} + +.content .item-list { + list-style-type: none; + padding: 0; +} + +.content .multi-column { + -moz-column-count: 5; + -moz-column-gap: 2.5em; + -webkit-column-count: 5; + -webkit-column-gap: 2.5em; + column-count: 5; + column-gap: 2.5em; +} +.content .multi-column li { width: 100%; display: inline-block; } + +.content > .methods > .method { + font-size: 1rem; + position: relative; +} +/* Shift "where ..." part of method or fn definition down a line */ +.content .method .where, +.content .fn .where, +.content .where.fmt-newline { + display: block; + font-size: 0.875rem; +} + +.content .methods > div:not(.notable-traits):not(.method) { + margin-left: 40px; + margin-bottom: 15px; +} + +.content .docblock > .impl-items { + margin-left: 20px; + margin-top: -34px; +} +.content .docblock >.impl-items .table-display { + margin: 0; +} +.content .docblock >.impl-items table td { + padding: 0; +} +.content .docblock > .impl-items .table-display, .impl-items table td { + border: none; +} + +.item-info { + display: block; +} + +.content .item-info code { + font-size: 0.875rem; +} + +.content .item-info { + position: relative; + margin-left: 24px; +} + +.sub-variant > div > .item-info { + margin-top: initial; +} + +.content .impl-items .docblock, .content .impl-items .item-info { + margin-bottom: .6em; +} + +.content .impl-items > .item-info { + margin-left: 40px; +} + +.methods > .item-info, .content .impl-items > .item-info { + margin-top: -8px; +} + +.impl-items { + flex-basis: 100%; +} + +#main-content > .item-info { + margin-top: 0; + margin-left: 0; +} + +nav.sub { + flex-grow: 1; + margin-bottom: 25px; +} +.source nav.sub { + margin-left: 32px; +} +nav.main { + padding: 20px 0; + text-align: center; +} +nav.main .current { + border-top: 1px solid; + border-bottom: 1px solid; +} +nav.main .separator { + border: 1px solid; + display: inline-block; + height: 23px; + margin: 0 20px; +} +nav.sum { text-align: right; } +nav.sub form { display: inline; } + +a { + text-decoration: none; + background: transparent; +} + +.small-section-header { + display: flex; + justify-content: space-between; + position: relative; +} + +.small-section-header:hover > .anchor { + display: initial; +} + +.in-band:hover > .anchor, .impl:hover > .anchor, .method.trait-impl:hover > .anchor, +.type.trait-impl:hover > .anchor, .associatedconstant.trait-impl:hover > .anchor, +.associatedtype.trait-impl:hover > .anchor { + display: inline-block; + position: absolute; +} +.anchor { + display: none; + position: absolute; + left: -0.5em; + background: none !important; +} +.anchor.field { + left: -5px; +} +.small-section-header > .anchor { + left: -15px; + padding-right: 8px; +} +h2.small-section-header > .anchor { + padding-right: 6px; +} +.anchor::before { + content: '§'; +} + +.docblock a:not(.srclink):not(.test-arrow):not(.scrape-help):hover, +.docblock-short a:not(.srclink):not(.test-arrow):not(.scrape-help):hover, .item-info a { + text-decoration: underline; +} + +.block a.current.crate { font-weight: 500; } + +/* In most contexts we use `overflow-wrap: anywhere` to ensure that we can wrap + as much as needed on mobile (see + src/test/rustdoc-gui/type-declaration-overflow.goml for an example of why + this matters). The `anywhere` value means: + + "Soft wrap opportunities introduced by the word break are considered when + calculating min-content intrinsic sizes." + + https://developer.mozilla.org/en-US/docs/Web/CSS/overflow-wrap#values + + For table layouts, that becomes a problem: the browser tries to make each + column as narrow as possible, and `overflow-wrap: anywhere` means it can do + so by breaking words - even if some other column could be shrunk without + breaking words! This shows up, for instance, in the `Structs` / `Modules` / + `Functions` (etcetera) sections of a module page, and when a docblock + contains a table. + + So, for table layouts, override the default with break-word, which does + _not_ affect min-content intrinsic sizes. +*/ +table, +.item-table { + overflow-wrap: break-word; +} + +.item-table { + display: table; +} +.item-row { + display: table-row; +} +.item-left, .item-right { + display: table-cell; +} +.item-left { + padding-right: 1.25rem; +} + +.search-container { + position: relative; + display: flex; + height: 34px; +} +.search-container > * { + height: 100%; +} +.search-results-title { + display: inline; +} +#search-settings { + font-size: 1.5rem; + font-weight: 500; + margin-bottom: 20px; +} +#crate-search { + min-width: 115px; + margin-top: 5px; + padding-left: 0.15em; + padding-right: 23px; + border: 1px solid; + border-radius: 4px; + outline: none; + cursor: pointer; + -moz-appearance: none; + -webkit-appearance: none; + /* Removes default arrow from firefox */ + background-repeat: no-repeat; + background-color: transparent; + background-size: 20px; + background-position: calc(100% - 1px) 56%; + background-image: /* AUTOREPLACE: */url("down-arrow.svg"); + max-width: 100%; + text-overflow: ellipsis; +} +.search-container { + margin-top: 4px; +} +.search-input { + /* Override Normalize.css: it has a rule that sets + -webkit-appearance: textfield for search inputs. That + causes rounded corners and no border on iOS Safari. */ + -webkit-appearance: none; + /* Override Normalize.css: we have margins and do + not want to overflow - the `moz` attribute is necessary + until Firefox 29, too early to drop at this point */ + -moz-box-sizing: border-box !important; + box-sizing: border-box !important; + outline: none; + border: 1px solid; + border-radius: 2px; + padding: 8px; + font-size: 1rem; + width: 100%; +} + +.search-results { + display: none; + padding-bottom: 2em; +} + +.search-results.active { + display: block; + /* prevent overhanging tabs from moving the first result */ + clear: both; +} + +.search-results .desc > span { + white-space: nowrap; + text-overflow: ellipsis; + overflow: hidden; + display: block; +} + +.search-results > a { + display: block; + width: 100%; + /* A little margin ensures the browser's outlining of focused links has room to display. */ + margin-left: 2px; + margin-right: 2px; + border-bottom: 1px solid #aaa3; +} + +.search-results > a > div { + display: flex; + flex-flow: row wrap; +} + +.search-results .result-name, .search-results div.desc, .search-results .result-description { + width: 50%; +} +.search-results .result-name { + padding-right: 1em; +} + +.search-results .result-name > span { + display: inline-block; + margin: 0; + font-weight: normal; +} + +.popover { + font-size: 1rem; + position: absolute; + right: 0; + z-index: 2; + display: block; + margin-top: 7px; + border-radius: 3px; + border: 1px solid; + font-size: 1rem; +} + +/* This rule is to draw the little arrow connecting the settings menu to the gear icon. */ +.popover::before { + content: ''; + position: absolute; + right: 11px; + border: solid; + border-width: 1px 1px 0 0; + display: inline-block; + padding: 4px; + transform: rotate(-45deg); + top: -5px; +} + +.popover, .popover::before { + background-color: var(--main-background-color); + color: var(--main-color); +} + +#help-button .popover { + max-width: 600px; +} + +#help-button .popover::before { + right: 48px; +} + +#help-button dt { + float: left; + clear: left; + display: block; + margin-right: 0.5rem; +} +#help-button span.top, #help-button span.bottom { + text-align: center; + display: block; + font-size: 1.125rem; +} +#help-button span.top { + text-align: center; + display: block; + margin: 10px 0; + border-bottom: 1px solid; + padding-bottom: 4px; + margin-bottom: 6px; +} +#help-button span.bottom { + clear: both; + border-top: 1px solid; +} +.side-by-side { + text-align: initial; +} +.side-by-side > div { + width: 50%; + float: left; + padding: 0 20px 20px 17px; +} + +.item-info .stab { + width: fit-content; + /* This min-height is needed to unify the height of the stab elements because some of them + have emojis. + */ + min-height: 36px; + display: flex; + align-items: center; + white-space: pre-wrap; +} +.stab { + padding: 3px; + margin-bottom: 5px; + font-size: 0.875rem; + font-weight: normal; +} +.stab p { + display: inline; + margin: 0; +} + +.stab .emoji { + font-size: 1.25rem; +} + +/* Black one-pixel outline around emoji shapes */ +.emoji { + text-shadow: + 1px 0 0 black, + -1px 0 0 black, + 0 1px 0 black, + 0 -1px 0 black; +} + +.module-item .stab, +.import-item .stab { + border-radius: 3px; + display: inline-block; + font-size: 0.875rem; + line-height: 1.2; + margin-bottom: 0; + margin-left: 0.3125em; + padding: 2px; + vertical-align: text-bottom; +} + +.module-item.unstable, +.import-item.unstable { + opacity: 0.65; +} + +.since { + font-weight: normal; + font-size: initial; +} + +.rightside { + padding-left: 12px; + padding-right: 2px; + position: initial; +} + +.impl-items .srclink, .impl .srclink, .methods .srclink { + /* Override header settings otherwise it's too bold */ + font-weight: normal; + font-size: 1rem; +} + +.rightside { + float: right; +} + +.variants_table { + width: 100%; +} + +.variants_table tbody tr td:first-child { + width: 1%; /* make the variant name as small as possible */ +} + +td.summary-column { + width: 100%; +} + +.summary { + padding-right: 0px; +} + +pre.rust .question-mark { + font-weight: bold; +} + +a.test-arrow { + display: inline-block; + visibility: hidden; + position: absolute; + padding: 5px 10px 5px 10px; + border-radius: 5px; + font-size: 1.375rem; + top: 5px; + right: 5px; + z-index: 1; +} +.example-wrap:hover .test-arrow { + visibility: visible; +} +a.test-arrow:hover{ + text-decoration: none; +} + +.code-attribute { + font-weight: 300; +} + +.item-spacer { + width: 100%; + height: 12px; +} + +.out-of-band > span.since { + position: initial; + font-size: 1.25rem; +} + +h3.variant { + font-weight: 600; + font-size: 1.125rem; + margin-bottom: 10px; + border-bottom: none; +} + +.sub-variant h4 { + font-size: 1rem; + font-weight: 400; + border-bottom: none; + margin-top: 0; + margin-bottom: 0; +} + +.sub-variant { + margin-left: 24px; + margin-bottom: 40px; +} + +.sub-variant > .sub-variant-field { + margin-left: 24px; +} + +.toggle-label { + display: inline-block; + margin-left: 4px; + margin-top: 3px; +} + +:target > code, :target > .code-header { + opacity: 1; +} + +:target { + padding-right: 3px; +} + +.information { + position: absolute; + left: -25px; + margin-top: 7px; + z-index: 1; +} + +.tooltip { + position: relative; + display: inline-block; + cursor: pointer; +} + +.tooltip::after { + display: none; + text-align: center; + padding: 5px 3px 3px 3px; + border-radius: 6px; + margin-left: 5px; + font-size: 1rem; +} + +.tooltip.ignore::after { + content: "This example is not tested"; +} +.tooltip.compile_fail::after { + content: "This example deliberately fails to compile"; +} +.tooltip.should_panic::after { + content: "This example panics"; +} +.tooltip.edition::after { + content: "This code runs with edition " attr(data-edition); +} + +.tooltip::before { + content: " "; + position: absolute; + top: 50%; + left: 16px; + margin-top: -5px; + border-width: 5px; + border-style: solid; + display: none; +} + +.tooltip:hover::before, .tooltip:hover::after { + display: inline; +} + +.tooltip.compile_fail, .tooltip.should_panic, .tooltip.ignore { + font-weight: bold; + font-size: 1.25rem; +} + +.notable-traits-tooltip { + display: inline-block; + cursor: pointer; +} + +.notable-traits:hover .notable-traits-tooltiptext, +.notable-traits .notable-traits-tooltiptext.force-tooltip { + display: inline-block; +} + +.notable-traits .notable-traits-tooltiptext { + display: none; + padding: 5px 3px 3px 3px; + border-radius: 6px; + margin-left: 5px; + z-index: 10; + font-size: 1rem; + cursor: default; + position: absolute; + border: 1px solid; +} + +.notable-traits-tooltip::after { + /* The margin on the tooltip does not capture hover events, + this extends the area of hover enough so that mouse hover is not + lost when moving the mouse to the tooltip */ + content: "\00a0\00a0\00a0"; +} + +.notable-traits .notable, .notable-traits .docblock { + margin: 0; +} + +.notable-traits .notable { + margin: 0; + margin-bottom: 13px; + font-size: 1.1875rem; + font-weight: 600; + display: block; +} + +.notable-traits .docblock code.content{ + margin: 0; + padding: 0; + font-size: 1.25rem; +} + +/* Example code has the "Run" button that needs to be positioned relative to the pre */ +pre.rust.rust-example-rendered { + position: relative; +} + +pre.rust { + tab-size: 4; + -moz-tab-size: 4; +} + +.search-failed { + text-align: center; + margin-top: 20px; + display: none; +} + +.search-failed.active { + display: block; +} + +.search-failed > ul { + text-align: left; + max-width: 570px; + margin-left: auto; + margin-right: auto; +} + +#titles { + height: 35px; +} + +#titles > button { + float: left; + width: 33.3%; + text-align: center; + font-size: 1.125rem; + cursor: pointer; + border: 0; + border-top: 2px solid; +} + +#titles > button:first-child:last-child { + margin-right: 1px; + width: calc(100% - 1px); +} + +#titles > button:not(:last-child) { + margin-right: 1px; + width: calc(33.3% - 1px); +} + +#titles > button > div.count { + display: inline-block; + font-size: 1rem; +} + +.notable-traits { + cursor: pointer; + z-index: 2; + margin-left: 5px; +} + +#sidebar-toggle { + position: sticky; + top: 0; + left: 0; + font-weight: bold; + font-size: 1.25rem; + border-bottom: 1px solid; + display: flex; + height: 40px; + justify-content: center; + align-items: center; + z-index: 10; +} +#source-sidebar { + width: 100%; + z-index: 1; + overflow: auto; +} +#source-sidebar > .title { + font-size: 1.5rem; + text-align: center; + border-bottom: 1px solid; + margin-bottom: 6px; +} +#sidebar-toggle > button { + background: none; + color: inherit; + cursor: pointer; + text-align: center; + border: none; + outline: none; + position: absolute; + top: 0; + bottom: 0; + left: 0; + right: 0; + /* work around button layout strangeness: https://stackoverflow.com/q/7271561 */ + width: 100%; + /* iOS button gradient: https://stackoverflow.com/q/5438567 */ + -webkit-appearance: none; + opacity: 1; +} +#settings-menu, #help-button { + margin-left: 4px; + outline: none; +} + +#copy-path { + height: 34px; +} +#settings-menu > a, #help-button > button, #copy-path { + padding: 5px; + width: 33px; + border: 1px solid; + border-radius: 2px; + cursor: pointer; +} +#settings-menu { + padding: 0; +} +#settings-menu > a, #help-button > button { + padding: 5px; + height: 100%; + display: block; +} + +@keyframes rotating { + from { + transform: rotate(0deg); + } + to { + transform: rotate(360deg); + } +} +#settings-menu.rotate > a img { + animation: rotating 2s linear infinite; +} + +.setting-line .radio-line input:checked { + box-shadow: inset 0 0 0 3px var(--main-background-color); + background-color: var(--settings-input-color); +} +.setting-line .radio-line input:focus { + box-shadow: 0 0 1px 1px var(--settings-input-color); +} +/* In here we combine both `:focus` and `:checked` properties. */ +.setting-line .radio-line input:checked:focus { + box-shadow: inset 0 0 0 3px var(--main-background-color), + 0 0 2px 2px var(--settings-input-color); +} +.setting-line .radio-line input:hover { + border-color: var(--settings-input-color) !important; +} +input:checked + .slider { + background-color: var(--settings-input-color); +} + +#help-button > button { + text-align: center; + /* Rare exception to specifying font sizes in rem. Since this is acting + as an icon, it's okay to specify their sizes in pixels. */ + font-size: 20px; + padding-top: 2px; +} + +#copy-path { + background: initial; + margin-left: 10px; + padding: 0; + padding-left: 2px; + border: 0; +} + +#theme-choices { + display: none; + position: absolute; + left: 0; + top: 28px; + border: 1px solid; + border-radius: 3px; + z-index: 1; + cursor: pointer; +} + +#theme-choices > button { + border: none; + width: 100%; + padding: 4px 8px; + text-align: center; + background: rgba(0,0,0,0); + overflow-wrap: normal; +} + +#theme-choices > button:not(:first-child) { + border-top: 1px solid; +} + +kbd { + display: inline-block; + padding: 3px 5px; + font: 15px monospace; + line-height: 10px; + vertical-align: middle; + border: solid 1px; + border-radius: 3px; + cursor: default; +} + +.hidden-by-impl-hider, +.hidden-by-usual-hider { + /* important because of conflicting rule for small screens */ + display: none !important; +} + +#implementations-list > h3 > span.in-band { + width: 100%; +} + +.table-display { + width: 100%; + border: 0; + border-collapse: collapse; + border-spacing: 0; + font-size: 1rem; +} + +.table-display tr td:first-child { + padding-right: 0; +} + +.table-display tr td:last-child { + float: right; +} +.table-display .out-of-band { + position: relative; + font-size: 1.125rem; + display: block; +} + +.table-display td:hover .anchor { + display: block; + top: 2px; + left: -5px; +} + +#main-content > ul { + padding-left: 10px; +} +#main-content > ul > li { + list-style: none; +} + +.non-exhaustive { + margin-bottom: 1em; +} + +details.dir-entry { + padding-left: 4px; +} + +details.dir-entry > summary { + margin: 0 0 0 13px; + list-style-position: outside; + cursor: pointer; +} + +details.dir-entry div.folders, details.dir-entry div.files { + padding-left: 23px; +} + +details.dir-entry a { + display: block; +} + +/* The hideme class is used on summary tags that contain a span with + placeholder text shown only when the toggle is closed. For instance, + "Expand description" or "Show methods". */ +details.rustdoc-toggle > summary.hideme { + cursor: pointer; +} + +details.rustdoc-toggle > summary { + list-style: none; +} +details.rustdoc-toggle > summary::-webkit-details-marker, +details.rustdoc-toggle > summary::marker { + display: none; +} + +details.rustdoc-toggle > summary.hideme > span { + margin-left: 9px; +} + +details.rustdoc-toggle > summary::before { + content: ""; + cursor: pointer; + width: 16px; + height: 16px; + background-repeat: no-repeat; + background-position: top left; + display: inline-block; + vertical-align: middle; + opacity: .5; +} + +/* Screen readers see the text version at the end the line. + Visual readers see the icon at the start of the line, but small and transparent. */ +details.rustdoc-toggle > summary::after { + content: "Expand"; + overflow: hidden; + width: 0; + height: 0; + position: absolute; +} + +details.rustdoc-toggle > summary.hideme::after { + /* "hideme" toggles already have a description when they're contracted */ + content: ""; +} + +details.rustdoc-toggle > summary:focus::before, +details.rustdoc-toggle > summary:hover::before { + opacity: 1; +} + +details.rustdoc-toggle.top-doc > summary, +details.rustdoc-toggle.top-doc > summary::before, +details.rustdoc-toggle.non-exhaustive > summary, +details.rustdoc-toggle.non-exhaustive > summary::before { + font-size: 1rem; +} + +details.non-exhaustive { + margin-bottom: 8px; +} + +details.rustdoc-toggle > summary.hideme::before { + position: relative; +} + +details.rustdoc-toggle > summary:not(.hideme)::before { + position: absolute; + left: -24px; + top: 4px; +} + +.impl-items > details.rustdoc-toggle > summary:not(.hideme)::before { + position: absolute; + left: -24px; +} + +/* When a "hideme" summary is open and the "Expand description" or "Show + methods" text is hidden, we want the [-] toggle that remains to not + affect the layout of the items to its right. To do that, we use + absolute positioning. Note that we also set position: relative + on the parent <details> to make this work properly. */ +details.rustdoc-toggle[open] > summary.hideme { + position: absolute; +} + +details.rustdoc-toggle { + position: relative; +} + +details.rustdoc-toggle[open] > summary.hideme > span { + display: none; +} + +details.rustdoc-toggle[open] > summary::before, +details.rustdoc-toggle[open] > summary.hideme::before { + background-image: /* AUTOREPLACE: */url("toggle-minus.svg"); +} + +details.rustdoc-toggle > summary::before { + background-image: /* AUTOREPLACE: */url("toggle-plus.svg"); +} + +details.rustdoc-toggle[open] > summary::before, +details.rustdoc-toggle[open] > summary.hideme::before { + width: 16px; + height: 16px; + background-repeat: no-repeat; + background-position: top left; + display: inline-block; + content: ""; +} + +details.rustdoc-toggle[open] > summary::after, +details.rustdoc-toggle[open] > summary.hideme::after { + content: "Collapse"; +} + +/* This is needed in docblocks to have the "▶" element to be on the same line. */ +.docblock summary > * { + display: inline-block; +} + +/* Media Queries */ + +/* +WARNING: RUSTDOC_MOBILE_BREAKPOINT MEDIA QUERY; +If you update this line, then you also need to update the line with the same warning +in storage.js plus the media query with (max-width: 700px) +*/ +@media (min-width: 701px) { + /* In case there is no documentation before a code block, we need to add some margin at the top + to prevent an overlay between the "collapse toggle" and the information tooltip. + However, it's not needed with smaller screen width because the doc/code block is always put + "one line" below. */ + .docblock > .information:first-child > .tooltip { + margin-top: 16px; + } + + /* When we expand the sidebar on the source code page, we hide the logo on the left of the + search bar to have more space. */ + .source-sidebar-expanded .source .sidebar + main .width-limiter .sub-logo-container.rust-logo { + display: none; + } + + .source-sidebar-expanded .source .sidebar { + width: 300px; + } +} + +/* +WARNING: RUSTDOC_MOBILE_BREAKPOINT MEDIA QUERY +If you update this line, then you also need to update the line with the same warning +in storage.js plus the media query with (min-width: 701px) +*/ +@media (max-width: 700px) { + /* When linking to an item with an `id` (for instance, by clicking a link in the sidebar, + or visiting a URL with a fragment like `#method.new`, we don't want the item to be obscured + by the topbar. Anything with an `id` gets scroll-margin-top equal to .mobile-topbar's size. + */ + *[id] { + scroll-margin-top: 45px; + } + + .rustdoc { + padding-top: 0px; + /* Sidebar should overlay main content, rather than pushing main content to the right. + Turn off `display: flex` on the body element. */ + display: block; + } + + main { + padding-left: 15px; + padding-top: 0px; + } + + .rustdoc, + .main-heading { + flex-direction: column; + } + + .content .out-of-band { + text-align: left; + margin-left: initial; + padding: initial; + } + + .content .out-of-band .since::before { + content: "Since "; + } + + #copy-path { + display: none; + } + + /* Hide the logo and item name from the sidebar. Those are displayed + in the mobile-topbar instead. */ + .sidebar .sidebar-logo, + .sidebar .location { + display: none; + } + + .sidebar-elems { + margin-top: 1em; + } + + .sidebar { + position: fixed; + top: 45px; + /* Hide the sidebar offscreen while not in use. Doing this instead of display: none means + the sidebar stays visible for screen readers, which is useful for navigation. */ + left: -1000px; + margin-left: 0; + margin: 0; + padding: 0; + z-index: 11; + /* Reduce height slightly to account for mobile topbar. */ + height: calc(100vh - 45px); + } + + /* The source view uses a different design for the sidebar toggle, and doesn't have a topbar, + so don't bump down the main content or the sidebar. */ + .source main, + .rustdoc.source .sidebar { + top: 0; + padding: 0; + height: 100vh; + border: 0; + } + + .sidebar.shown, + .source-sidebar-expanded .source .sidebar, + .sidebar:focus-within { + left: 0; + } + + .rustdoc.source > .sidebar { + position: fixed; + margin: 0; + z-index: 11; + width: 0; + } + + .mobile-topbar .location a { + padding: 0; + margin: 0; + } + + .mobile-topbar .location { + border: none; + padding: 0; + margin: auto 0.5em auto auto; + text-overflow: ellipsis; + overflow: hidden; + white-space: nowrap; + /* Rare exception to specifying font sizes in rem. Since the topbar + height is specified in pixels, this also has to be specified in + pixels to avoid overflowing the topbar when the user sets a bigger + font size. */ + font-size: 24px; + } + + .mobile-topbar .logo-container { + max-height: 45px; + } + + .mobile-topbar .logo-container > img { + max-width: 35px; + max-height: 35px; + margin-left: 20px; + margin-top: 5px; + margin-bottom: 5px; + } + + .mobile-topbar { + display: flex; + flex-direction: row; + position: sticky; + z-index: 10; + font-size: 2rem; + height: 45px; + width: 100%; + left: 0; + top: 0; + } + + .source .mobile-topbar { + display: none; + } + + .sidebar-menu-toggle { + width: 45px; + /* Rare exception to specifying font sizes in rem. Since this is acting + as an icon, it's okay to specify its sizes in pixels. */ + font-size: 32px; + border: none; + } + + .sidebar-elems { + background-color: var(--sidebar-background-color); + } + + .source nav:not(.sidebar).sub { + margin-left: 32px; + } + + .content { + margin-left: 0px; + } + + .source .content { + margin-top: 10px; + } + + #search { + margin-left: 0; + padding: 0; + } + + .anchor { + display: none !important; + } + + .notable-traits { + position: absolute; + left: -22px; + top: 24px; + } + + #titles > button > div.count { + float: left; + width: 100%; + } + + #titles { + height: 50px; + } + + /* Because of ios, we need to actually have a full height sidebar title so the + * actual sidebar can show up. But then we need to make it transparent so we don't + * hide content. The filler just allows to create the background for the sidebar + * title. But because of the absolute position, I had to lower the z-index. + */ + #sidebar-filler { + position: fixed; + left: 45px; + width: calc(100% - 45px); + top: 0; + height: 45px; + z-index: -1; + border-bottom: 1px solid; + } + + #main-content > details.rustdoc-toggle > summary::before, + #main-content > div > details.rustdoc-toggle > summary::before { + left: -11px; + } + + #sidebar-toggle { + position: fixed; + left: 1px; + top: 100px; + width: 30px; + font-size: 1.5rem; + text-align: center; + padding: 0; + z-index: 10; + border-top-right-radius: 3px; + border-bottom-right-radius: 3px; + cursor: pointer; + font-weight: bold; + border: 1px solid; + border-left: 0; + } + + .source-sidebar-expanded #sidebar-toggle { + left: unset; + top: unset; + width: unset; + border-top-right-radius: unset; + border-bottom-right-radius: unset; + position: sticky; + border: 0; + border-bottom: 1px solid; + } + + #source-sidebar { + z-index: 11; + } + + #main-content > .line-numbers { + margin-top: 0; + } + + .notable-traits .notable-traits-tooltiptext { + left: 0; + top: 100%; + } + + /* We don't display the help button on mobile devices. */ + #help-button { + display: none; + } + + /* Display an alternating layout on tablets and phones */ + .item-table { + display: block; + } + .item-row { + display: flex; + flex-flow: column wrap; + } + .item-left, .item-right { + width: 100%; + } + + /* Display an alternating layout on tablets and phones */ + .search-results > a { + border-bottom: 1px solid #aaa9; + padding: 5px 0px; + } + .search-results .result-name, .search-results div.desc, .search-results .result-description { + width: 100%; + } + .search-results div.desc, .search-results .result-description, .item-right { + padding-left: 2em; + } + + .source-sidebar-expanded .source .sidebar { + max-width: 100vw; + width: 100vw; + } + + /* Position of the "[-]" element. */ + details.rustdoc-toggle:not(.top-doc) > summary { + margin-left: 10px; + } + .impl-items > details.rustdoc-toggle > summary:not(.hideme)::before, + #main-content > details.rustdoc-toggle:not(.top-doc) > summary::before, + #main-content > div > details.rustdoc-toggle > summary::before { + left: -11px; + } +} + +@media print { + nav.sidebar, nav.sub, .content .out-of-band, a.srclink, #copy-path, + details.rustdoc-toggle[open] > summary::before, details.rustdoc-toggle > summary::before, + details.rustdoc-toggle.top-doc > summary { + display: none; + } + + .docblock { + margin-left: 0; + } + + main { + padding: 10px; + } +} + +@media (max-width: 464px) { + #titles, #titles > button { + height: 73px; + } + + #main-content > table:not(.table-display) td { + word-break: break-word; + width: 50%; + } + + #crate-search { + border-radius: 4px; + } + + .docblock { + margin-left: 12px; + } + + .docblock code { + overflow-wrap: break-word; + overflow-wrap: anywhere; + } + + .sub-container { + flex-direction: column; + } + + .sub-logo-container { + align-self: center; + } + + .source .sub-logo-container > img { + height: 35px; + width: 35px; + } + + #sidebar-toggle { + top: 10px; + } + .source-sidebar-expanded #sidebar-toggle { + top: unset; + } +} + +.method-toggle summary, +.implementors-toggle summary, +.impl { + margin-bottom: 0.75em; +} + +.method-toggle[open] { + margin-bottom: 2em; +} + +.implementors-toggle[open] { + margin-bottom: 2em; +} + +#trait-implementations-list .method-toggle, +#synthetic-implementations-list .method-toggle, +#blanket-implementations-list .method-toggle { + margin-bottom: 1em; +} + +/* Begin: styles for --scrape-examples feature */ + +.scraped-example-list .scrape-help { + margin-left: 10px; + padding: 0 4px; + font-weight: normal; + font-size: 12px; + position: relative; + bottom: 1px; + background: transparent; + border-width: 1px; + border-style: solid; + border-radius: 50px; +} + +.scraped-example .code-wrapper { + position: relative; + display: flex; + flex-direction: row; + flex-wrap: wrap; + width: 100%; +} + +.scraped-example:not(.expanded) .code-wrapper { + max-height: 240px; +} + +.scraped-example:not(.expanded) .code-wrapper pre { + overflow-y: hidden; + max-height: 240px; + padding-bottom: 0; +} + +.scraped-example:not(.expanded) .code-wrapper pre.line-numbers { + overflow-x: hidden; +} + +.scraped-example .code-wrapper .prev { + position: absolute; + top: 0.25em; + right: 2.25em; + z-index: 100; + cursor: pointer; +} + +.scraped-example .code-wrapper .next { + position: absolute; + top: 0.25em; + right: 1.25em; + z-index: 100; + cursor: pointer; +} + +.scraped-example .code-wrapper .expand { + position: absolute; + top: 0.25em; + right: 0.25em; + z-index: 100; + cursor: pointer; +} + +.scraped-example:not(.expanded) .code-wrapper:before { + content: " "; + width: 100%; + height: 5px; + position: absolute; + z-index: 100; + top: 0; +} + +.scraped-example:not(.expanded) .code-wrapper:after { + content: " "; + width: 100%; + height: 5px; + position: absolute; + z-index: 100; + bottom: 0; +} + +.scraped-example .code-wrapper .line-numbers { + margin: 0; + padding: 14px 0; +} + +.scraped-example .code-wrapper .line-numbers span { + padding: 0 14px; +} + +.scraped-example .code-wrapper .example-wrap { + flex: 1; + overflow-x: auto; + overflow-y: hidden; + margin-bottom: 0; +} + +.scraped-example:not(.expanded) .code-wrapper .example-wrap { + overflow-x: hidden; +} + +.scraped-example .code-wrapper .example-wrap pre.rust { + overflow-x: inherit; + width: inherit; + overflow-y: hidden; +} + + +.more-examples-toggle { + max-width: calc(100% + 25px); + margin-top: 10px; + margin-left: -25px; +} + +.more-examples-toggle .hide-more { + margin-left: 25px; + margin-bottom: 5px; + cursor: pointer; +} + +.more-scraped-examples { + margin-left: 5px; + display: flex; + flex-direction: row; +} + +.more-scraped-examples-inner { + /* 20px is width of toggle-line + toggle-line-inner */ + width: calc(100% - 20px); +} + +.toggle-line { + align-self: stretch; + margin-right: 10px; + margin-top: 5px; + padding: 0 4px; + cursor: pointer; +} + +.toggle-line-inner { + min-width: 2px; + height: 100%; +} + +.more-scraped-examples .scraped-example { + margin-bottom: 20px; +} + +.more-scraped-examples .scraped-example:last-child { + margin-bottom: 0; +} + +.example-links a { + margin-top: 20px; +} + +.example-links ul { + margin-bottom: 0; +} + +/* End: styles for --scrape-examples feature */ diff --git a/src/librustdoc/html/static/css/settings.css b/src/librustdoc/html/static/css/settings.css new file mode 100644 index 000000000..e82ec0426 --- /dev/null +++ b/src/librustdoc/html/static/css/settings.css @@ -0,0 +1,90 @@ +.setting-line { + margin: 0.6em 0 0.6em 0.3em; + position: relative; +} + +.setting-line .choices { + display: flex; + flex-wrap: wrap; +} + +.setting-line .radio-line input { + margin-right: 0.3em; + height: 1.2rem; + width: 1.2rem; + border: 1px solid; + outline: none; + -webkit-appearance: none; + cursor: pointer; + border-radius: 50%; +} +.setting-line .radio-line input + span { + padding-bottom: 1px; +} + +.radio-line .setting-name { + width: 100%; +} + +.radio-line .choice { + margin-top: 0.1em; + margin-bottom: 0.1em; + min-width: 3.8em; + padding: 0.3em; + display: flex; + align-items: center; + cursor: pointer; +} +.radio-line .choice + .choice { + margin-left: 0.5em; +} + +.toggle { + position: relative; + width: 100%; + margin-right: 20px; + display: flex; + align-items: center; + cursor: pointer; +} + +.toggle input { + opacity: 0; + position: absolute; +} + +.slider { + position: relative; + width: 45px; + min-width: 45px; + display: block; + height: 28px; + margin-right: 20px; + cursor: pointer; + background-color: #ccc; + transition: .3s; +} + +.slider:before { + position: absolute; + content: ""; + height: 19px; + width: 19px; + left: 4px; + bottom: 4px; + transition: .3s; +} + +input:checked + .slider:before { + transform: translateX(19px); +} + +.setting-line > .sub-settings { + padding-left: 42px; + width: 100%; + display: block; +} + +#settings .setting-line { + margin: 1.2em 0.6em; +} diff --git a/src/librustdoc/html/static/css/themes/ayu.css b/src/librustdoc/html/static/css/themes/ayu.css new file mode 100644 index 000000000..c42cac59b --- /dev/null +++ b/src/librustdoc/html/static/css/themes/ayu.css @@ -0,0 +1,563 @@ +/* +Based off of the Ayu theme +Original by Dempfi (https://github.com/dempfi/ayu) +*/ + +:root { + --main-background-color: #0f1419; + --main-color: #c5c5c5; + --settings-input-color: #ffb454; + --sidebar-background-color: #14191f; + --sidebar-background-color-hover: rgba(70, 70, 70, 0.33); + --code-block-background-color: #191f26; + --scrollbar-track-background-color: transparent; + --scrollbar-thumb-background-color: #5c6773; + --scrollbar-color: #5c6773 #24292f; + --headings-border-bottom-color: #5c6773; +} + +.slider { + background-color: #ccc; +} +.slider:before { + background-color: white; +} +input:focus + .slider { + box-shadow: 0 0 0 2px #0a84ff, 0 0 0 6px rgba(10, 132, 255, 0.3); +} + +h1, h2, h3, h4 { + color: white; +} +h1.fqn a { + color: #fff; +} +h4 { + border: none; +} + +.in-band { + background-color: #0f1419; +} + +.docblock code { + color: #ffb454; +} +.code-header { + color: #e6e1cf; +} +.docblock pre > code, pre > code { + color: #e6e1cf; +} +span code { + color: #e6e1cf; +} +.docblock a > code { + color: #39AFD7 !important; +} +pre, .rustdoc.source .example-wrap { + color: #e6e1cf; +} + +.rust-logo { + filter: drop-shadow(1px 0 0px #fff) + drop-shadow(0 1px 0 #fff) + drop-shadow(-1px 0 0 #fff) + drop-shadow(0 -1px 0 #fff); +} + +.sidebar .current, +.sidebar a:hover { + background-color: transparent; + color: #ffb44c; +} + +.sidebar-elems .location { + color: #ff7733; +} + +.line-numbers span { color: #5c6773; } +.line-numbers .line-highlighted { + color: #708090; + background-color: rgba(255, 236, 164, 0.06); + padding-right: 4px; + border-right: 1px solid #ffb44c; +} + +.docblock table td, .docblock table th { + border-color: #5c6773; +} + +.search-results a:hover { + background-color: #777; +} + +.search-results a:focus { + color: #000 !important; + background-color: #c6afb3; +} +.search-results a { + color: #0096cf; +} +.search-results a div.desc { + color: #c5c5c5; +} + +.content .item-info::before { color: #ccc; } + +.content span.foreigntype, .content a.foreigntype { color: #ffa0a5; } +.content span.union, .content a.union { color: #ffa0a5; } +.content span.constant, .content a.constant, +.content span.static, .content a.static { color: #39AFD7; } +.content span.primitive, .content a.primitive { color: #ffa0a5; } +.content span.traitalias, .content a.traitalias { color: #39AFD7; } +.content span.keyword, .content a.keyword { color: #39AFD7; } + +.content span.externcrate, .content span.mod, .content a.mod { + color: #39AFD7; +} +.content span.struct, .content a.struct { + color: #ffa0a5; +} +.content span.enum, .content a.enum { + color: #ffa0a5; +} +.content span.trait, .content a.trait { + color: #39AFD7; +} +.content span.type, .content a.type { + color: #39AFD7; +} +.content span.type, +.content a.type, +.block a.current.type { color: #39AFD7; } +.content span.associatedtype, +.content a.associatedtype, +.block a.current.associatedtype { color: #39AFD7; } +.content span.fn, .content a.fn, .content span.method, +.content a.method, .content span.tymethod, +.content a.tymethod, .content .fnname { + color: #fdd687; +} +.content span.attr, .content a.attr, .content span.derive, +.content a.derive, .content span.macro, .content a.macro { + color: #a37acc; +} + +.sidebar a { color: #53b1db; } +.sidebar a.current.type { color: #53b1db; } +.sidebar a.current.associatedtype { color: #53b1db; } + +pre.rust .comment { color: #788797; } +pre.rust .doccomment { color: #a1ac88; } + +nav.main .current { + border-top-color: #5c6773; + border-bottom-color: #5c6773; +} +nav.main .separator { + border: 1px solid #5c6773; +} +a { + color: #39AFD7; +} + +.sidebar h2 a, +.sidebar h3 a { + color: white; +} +.search-results a { + color: #0096cf; +} +body.source .example-wrap pre.rust a { + background: #333; +} + +details.rustdoc-toggle > summary.hideme > span, +details.rustdoc-toggle > summary::before { + color: #999; +} + +details.rustdoc-toggle > summary::before { + filter: invert(100%); +} + +#crate-search, .search-input { + background-color: #141920; + border-color: #424c57; +} + +#crate-search { + /* Without the `!important`, the border-color is ignored for `<select>`... + It cannot be in the group above because `.search-input` has a different border color on + hover. */ + border-color: #424c57 !important; +} + +.search-input { + color: #ffffff; +} + +.module-item .stab, +.import-item .stab { + color: #000; +} + +/* Created this empty rule to satisfy the theme checks. */ +.stab.empty-impl {} +.stab.must_implement {} + +.stab.unstable, +.stab.deprecated, +.stab.portability, +.stab.empty-impl, +.stab.must_implement { + color: #c5c5c5; + background: #314559 !important; + border-style: none !important; + border-radius: 4px; + padding: 3px 6px 3px 6px; +} + +.stab.portability > code { + color: #e6e1cf; + background: none; +} + +.rightside, +.out-of-band { + color: grey; +} + +.result-name .primitive > i, .result-name .keyword > i { + color: #788797; +} + +.line-numbers :target { background-color: transparent; } + +/* Code highlighting */ +pre.rust .number, pre.rust .string { color: #b8cc52; } +pre.rust .kw, pre.rust .kw-2, pre.rust .prelude-ty, +pre.rust .bool-val, pre.rust .prelude-val, +pre.rust .op, pre.rust .lifetime { color: #ff7733; } +pre.rust .macro, pre.rust .macro-nonterminal { color: #a37acc; } +pre.rust .question-mark { + color: #ff9011; +} +pre.rust .self { + color: #36a3d9; + font-style: italic; +} +pre.rust .attribute { + color: #e6e1cf; +} +pre.rust .attribute .ident, pre.rust .attribute .op { + color: #e6e1cf; +} + +.example-wrap > pre.line-number { + color: #5c67736e; + border: none; +} + +a.test-arrow { + font-size: 100%; + color: #788797; + border-radius: 4px; + background-color: rgba(57, 175, 215, 0.09); +} + +a.test-arrow:hover { + background-color: rgba(57, 175, 215, 0.368); + color: #c5c5c5; +} + +.toggle-label, +.code-attribute { + color: #999; +} + +:target { + background: rgba(255, 236, 164, 0.06); + border-right: 3px solid rgba(255, 180, 76, 0.85); +} + +pre.compile_fail { + border-left: 2px solid rgba(255,0,0,.4); +} + +pre.compile_fail:hover, .information:hover + pre.compile_fail { + border-left: 2px solid #f00; +} + +pre.should_panic { + border-left: 2px solid rgba(255,0,0,.4); +} + +pre.should_panic:hover, .information:hover + pre.should_panic { + border-left: 2px solid #f00; +} + +pre.ignore { + border-left: 2px solid rgba(255,142,0,.6); +} + +pre.ignore:hover, .information:hover + pre.ignore { + border-left: 2px solid #ff9200; +} + +.tooltip.compile_fail { + color: rgba(255,0,0,.5); +} + +.information > .compile_fail:hover { + color: #f00; +} + +.tooltip.should_panic { + color: rgba(255,0,0,.5); +} + +.information > .should_panic:hover { + color: #f00; +} + +.tooltip.ignore { + color: rgba(255,142,0,.6); +} + +.information > .ignore:hover { + color: #ff9200; +} + +.search-failed a { + color: #39AFD7; +} + +.tooltip::after { + background-color: #314559; + color: #c5c5c5; + border: 1px solid #5c6773; +} + +.tooltip::before { + border-color: transparent #314559 transparent transparent; +} + +.notable-traits-tooltiptext { + background-color: #314559; + border-color: #5c6773; +} + +.notable-traits-tooltiptext .notable { + border-bottom-color: #5c6773; +} + +#titles > button.selected { + background-color: #141920 !important; + border-bottom: 1px solid #ffb44c !important; + border-top: none; +} + +#titles > button:not(.selected) { + background-color: transparent !important; + border: none; +} + +#titles > button:hover { + border-bottom: 1px solid rgba(242, 151, 24, 0.3); +} + +#titles > button > div.count { + color: #888; +} + +/* rules that this theme does not need to set, here to satisfy the rule checker */ +/* note that a lot of these are partially set in some way (meaning they are set +individually rather than as a group) */ +/* FIXME: these rules should be at the bottom of the file but currently must be +above the `@media (max-width: 700px)` rules due to a bug in the css checker */ +/* see https://github.com/rust-lang/rust/pull/71237#issuecomment-618170143 */ +.search-input:focus {} +.content span.attr,.content a.attr,.block a.current.attr,.content span.derive,.content a.derive, +.block a.current.derive,.content span.macro,.content a.macro,.block a.current.macro {} +.content span.struct,.content a.struct,.block a.current.struct {} +#titles>button:hover,#titles>button.selected {} +.content span.typedef,.content a.typedef,.block a.current.typedef {} +.content span.union,.content a.union,.block a.current.union {} +pre.rust .lifetime {} +.stab.unstable {} +h2, +h3:not(.impl):not(.method):not(.type):not(.tymethod), h4:not(.method):not(.type):not(.tymethod) {} +.content span.enum,.content a.enum,.block a.current.enum {} +.content span.constant,.content a.constant,.block a.current.constant,.content span.static, +.content a.static, .block a.current.static {} +.content span.keyword,.content a.keyword,.block a.current.keyword {} +pre.rust .comment {} +.content span.traitalias,.content a.traitalias,.block a.current.traitalias {} +.content span.fn,.content a.fn,.block a.current.fn,.content span.method,.content a.method, +.block a.current.method,.content span.tymethod,.content a.tymethod,.block a.current.tymethod, +.content .fnname {} +pre.rust .kw {} +pre.rust .self,pre.rust .bool-val,pre.rust .prelude-val,pre.rust .attribute, +pre.rust .attribute .ident {} +.content span.foreigntype,.content a.foreigntype,.block a.current.foreigntype {} +pre.rust .doccomment {} +.stab.deprecated {} +.content a.attr,.content a.derive,.content a.macro {} +.stab.portability {} +.content span.primitive,.content a.primitive,.block a.current.primitive {} +.content span.externcrate,.content span.mod,.content a.mod,.block a.current.mod {} +pre.rust .kw-2,pre.rust .prelude-ty {} +.content span.trait,.content a.trait,.block a.current.trait {} + +.search-results a:focus span {} +a.result-trait:focus {} +a.result-traitalias:focus {} +a.result-mod:focus, +a.result-externcrate:focus {} +a.result-mod:focus {} +a.result-externcrate:focus {} +a.result-enum:focus {} +a.result-struct:focus {} +a.result-union:focus {} +a.result-fn:focus, +a.result-method:focus, +a.result-tymethod:focus {} +a.result-type:focus {} +a.result-associatedtype:focus {} +a.result-foreigntype:focus {} +a.result-attr:focus, +a.result-derive:focus, +a.result-macro:focus {} +a.result-constant:focus, +a.result-static:focus {} +a.result-primitive:focus {} +a.result-keyword:focus {} + +.sidebar a.current.enum {} +.sidebar a.current.struct {} +.sidebar a.current.foreigntype {} +.sidebar a.current.attr, +.sidebar a.current.derive, +.sidebar a.current.macro {} +.sidebar a.current.union {} +.sidebar a.current.constant +.sidebar a.current.static {} +.sidebar a.current.primitive {} +.sidebar a.current.externcrate +.sidebar a.current.mod {} +.sidebar a.current.trait {} +.sidebar a.current.traitalias {} +.sidebar a.current.fn, +.sidebar a.current.method, +.sidebar a.current.tymethod {} +.sidebar a.current.keyword {} + +@media (max-width: 700px) { + .sidebar-elems { + border-right-color: #5c6773; + } +} + +kbd { + color: #c5c5c5; + background-color: #314559; + border-color: #5c6773; + border-bottom-color: #5c6773; + box-shadow: inset 0 -1px 0 #5c6773; +} + +#settings-menu > a, #help-button > button { + border-color: #5c6773; + background-color: #0f1419; + color: #fff; +} + +#settings-menu > a img { + filter: invert(100); +} + +.popover, .popover::before, +#help-button span.top, #help-button span.bottom { + border-color: #5c6773; +} + +#copy-path { + color: #fff; +} +#copy-path > img { + filter: invert(70%); +} +#copy-path:hover > img { + filter: invert(100%); +} + +#settings-menu > a:hover, #settings-menu > a:focus, +#help-button > button:hover, #help-button > button:focus { + border-color: #e0e0e0; +} + +#theme-choices { + border-color: #5c6773; + background-color: #0f1419; +} + +#theme-choices > button:not(:first-child) { + border-top-color: #5c6773; +} + +#theme-choices > button:hover, #theme-choices > button:focus { + background-color: rgba(110, 110, 110, 0.33); +} + +.search-results .result-name span.alias { + color: #c5c5c5; +} +.search-results .result-name span.grey { + color: #999; +} + +#source-sidebar > .title { + color: #fff; + border-bottom-color: #5c6773; +} +#source-sidebar div.files > a:hover, details.dir-entry summary:hover, +#source-sidebar div.files > a:focus, details.dir-entry summary:focus { + background-color: #14191f; + color: #ffb44c; +} +#source-sidebar div.files > a.selected { + background-color: #14191f; + color: #ffb44c; +} + +.scraped-example-list .scrape-help { + border-color: #aaa; + color: #eee; +} +.scraped-example-list .scrape-help:hover { + border-color: white; + color: white; +} +.more-examples-toggle summary, .more-examples-toggle .hide-more { + color: #999; +} +.scraped-example .example-wrap .rust span.highlight { + background: rgb(91, 59, 1); +} +.scraped-example .example-wrap .rust span.highlight.focus { + background: rgb(124, 75, 15); +} +.scraped-example:not(.expanded) .code-wrapper:before { + background: linear-gradient(to bottom, rgba(15, 20, 25, 1), rgba(15, 20, 25, 0)); +} +.scraped-example:not(.expanded) .code-wrapper:after { + background: linear-gradient(to top, rgba(15, 20, 25, 1), rgba(15, 20, 25, 0)); +} +.toggle-line-inner { + background: #999; +} +.toggle-line:hover .toggle-line-inner { + background: #c5c5c5; +} diff --git a/src/librustdoc/html/static/css/themes/dark.css b/src/librustdoc/html/static/css/themes/dark.css new file mode 100644 index 000000000..a550eb1c1 --- /dev/null +++ b/src/librustdoc/html/static/css/themes/dark.css @@ -0,0 +1,409 @@ +:root { + --main-background-color: #353535; + --main-color: #ddd; + --settings-input-color: #2196f3; + --sidebar-background-color: #505050; + --sidebar-background-color-hover: #676767; + --code-block-background-color: #2A2A2A; + --scrollbar-track-background-color: #717171; + --scrollbar-thumb-background-color: rgba(32, 34, 37, .6); + --scrollbar-color: rgba(32,34,37,.6) #5a5a5a; + --headings-border-bottom-color: #d2d2d2; +} + +.slider { + background-color: #ccc; +} +.slider:before { + background-color: white; +} +input:focus + .slider { + box-shadow: 0 0 0 2px #0a84ff, 0 0 0 6px rgba(10, 132, 255, 0.3); +} + +.in-band { + background-color: #353535; +} + +.rust-logo { + filter: drop-shadow(1px 0 0px #fff) + drop-shadow(0 1px 0 #fff) + drop-shadow(-1px 0 0 #fff) + drop-shadow(0 -1px 0 #fff) +} + +.sidebar .current, +.sidebar a:hover { + background: #444; +} + +.line-numbers span { color: #3B91E2; } +.line-numbers .line-highlighted { + background-color: #0a042f !important; +} + +.docblock table td, .docblock table th { + border-color: #ddd; +} + +.search-results a:hover { + background-color: #777; +} + +.search-results a:focus { + color: #eee !important; + background-color: #616161; +} +.search-results a:focus span { color: #eee !important; } +a.result-trait:focus { background-color: #013191; } +a.result-traitalias:focus { background-color: #013191; } +a.result-mod:focus, +a.result-externcrate:focus { background-color: #884719; } +a.result-enum:focus { background-color: #194e9f; } +a.result-struct:focus { background-color: #194e9f; } +a.result-union:focus { background-color: #194e9f; } +a.result-fn:focus, +a.result-method:focus, +a.result-tymethod:focus { background-color: #4950ed; } +a.result-type:focus { background-color: #194e9f; } +a.result-associatedtype:focus { background-color: #884719; } +a.result-foreigntype:focus { background-color: #194e9f; } +a.result-attr:focus, +a.result-derive:focus, +a.result-macro:focus { background-color: #217d1c; } +a.result-constant:focus, +a.result-static:focus { background-color: #884719; } +a.result-primitive:focus { background-color: #194e9f; } +a.result-keyword:focus { background-color: #884719; } + +.content .item-info::before { color: #ccc; } + +.content span.enum, .content a.enum, .block a.current.enum { color: #2dbfb8; } +.content span.struct, .content a.struct, .block a.current.struct { color: #2dbfb8; } +.content span.type, .content a.type, .block a.current.type { color: #2dbfb8; } +.content span.associatedtype, +.content a.associatedtype, +.block a.current.associatedtype { color: #D2991D; } +.content span.foreigntype, .content a.foreigntype, .block a.current.foreigntype { color: #2dbfb8; } +.content span.attr, .content a.attr, .block a.current.attr, +.content span.derive, .content a.derive, .block a.current.derive, +.content span.macro, .content a.macro, .block a.current.macro { color: #09bd00; } +.content span.union, .content a.union, .block a.current.union { color: #2dbfb8; } +.content span.constant, .content a.constant, .block a.current.constant, +.content span.static, .content a.static, .block a.current.static { color: #D2991D; } +.content span.primitive, .content a.primitive, .block a.current.primitive { color: #2dbfb8; } +.content span.externcrate, +.content span.mod, .content a.mod, .block a.current.mod { color: #D2991D; } +.content span.trait, .content a.trait, .block a.current.trait { color: #b78cf2; } +.content span.traitalias, .content a.traitalias, .block a.current.traitalias { color: #b78cf2; } +.content span.fn, .content a.fn, .block a.current.fn, +.content span.method, .content a.method, .block a.current.method, +.content span.tymethod, .content a.tymethod, .block a.current.tymethod, +.content .fnname{ color: #2BAB63; } +.content span.keyword, .content a.keyword, .block a.current.keyword { color: #D2991D; } + +.sidebar a { color: #fdbf35; } +.sidebar a.current.enum { color: #12ece2; } +.sidebar a.current.struct { color: #12ece2; } +.sidebar a.current.type { color: #12ece2; } +.sidebar a.current.associatedtype { color: #fdbf35; } +.sidebar a.current.foreigntype { color: #12ece2; } +.sidebar a.current.attr, +.sidebar a.current.derive, +.sidebar a.current.macro { color: #0be900; } +.sidebar a.current.union { color: #12ece2; } +.sidebar a.current.constant +.sidebar a.current.static { color: #fdbf35; } +.sidebar a.current.primitive { color: #12ece2; } +.sidebar a.current.externcrate +.sidebar a.current.mod { color: #fdbf35; } +.sidebar a.current.trait { color: #cca7ff; } +.sidebar a.current.traitalias { color: #cca7ff; } +.sidebar a.current.fn, +.sidebar a.current.method, +.sidebar a.current.tymethod { color: #32d479; } +.sidebar a.current.keyword { color: #fdbf35; } + +pre.rust .comment { color: #8d8d8b; } +pre.rust .doccomment { color: #8ca375; } + +nav.main .current { + border-top-color: #eee; + border-bottom-color: #eee; +} +nav.main .separator { + border-color: #eee; +} + +a { + color: #D2991D; +} + +body.source .example-wrap pre.rust a { + background: #333; +} + +details.rustdoc-toggle > summary.hideme > span, +details.rustdoc-toggle > summary::before { + color: #999; +} + +details.rustdoc-toggle > summary::before { + filter: invert(100%); +} + +#crate-search, .search-input { + color: #111; + background-color: #f0f0f0; + border-color: #f0f0f0; +} + +#crate-search { + /* Without the `!important`, the border-color is ignored for `<select>`... + It cannot be in the group above because `.search-input` has a different border color on + hover. */ + border-color: #f0f0f0 !important; +} + +.search-input { + border-color: #e0e0e0; +} + +.search-input:focus { + border-color: #008dfd; +} + +.stab.empty-impl { background: #FFF5D6; border-color: #FFC600; color: #2f2f2f; } +.stab.unstable { background: #FFF5D6; border-color: #FFC600; color: #2f2f2f; } +.stab.deprecated { background: #ffc4c4; border-color: #db7b7b; color: #2f2f2f; } +.stab.must_implement { background: #F3DFFF; border-color: #b07bdb; color: #2f2f2f; } +.stab.portability { background: #F3DFFF; border-color: #b07bdb; color: #2f2f2f; } +.stab.portability > code { background: none; } + +.rightside, +.out-of-band { + color: grey; +} + +.line-numbers :target { background-color: transparent; } + +/* Code highlighting */ +pre.rust .kw { color: #ab8ac1; } +pre.rust .kw-2, pre.rust .prelude-ty { color: #769acb; } +pre.rust .number, pre.rust .string { color: #83a300; } +pre.rust .self, pre.rust .bool-val, pre.rust .prelude-val, +pre.rust .attribute, pre.rust .attribute .ident { color: #ee6868; } +pre.rust .macro, pre.rust .macro-nonterminal { color: #3E999F; } +pre.rust .lifetime { color: #d97f26; } +pre.rust .question-mark { + color: #ff9011; +} + +.example-wrap > pre.line-number { + border-color: #4a4949; +} + +a.test-arrow { + color: #dedede; + background-color: rgba(78, 139, 202, 0.2); +} + +a.test-arrow:hover{ + background-color: #4e8bca; +} + +.toggle-label, +.code-attribute { + color: #999; +} + +:target { + background-color: #494a3d; + border-right: 3px solid #bb7410; +} + +pre.compile_fail { + border-left: 2px solid rgba(255,0,0,.8); +} + +pre.compile_fail:hover, .information:hover + pre.compile_fail { + border-left: 2px solid #f00; +} + +pre.should_panic { + border-left: 2px solid rgba(255,0,0,.8); +} + +pre.should_panic:hover, .information:hover + pre.should_panic { + border-left: 2px solid #f00; +} + +pre.ignore { + border-left: 2px solid rgba(255,142,0,.6); +} + +pre.ignore:hover, .information:hover + pre.ignore { + border-left: 2px solid #ff9200; +} + +.tooltip.compile_fail { + color: rgba(255,0,0,.8); +} + +.information > .compile_fail:hover { + color: #f00; +} + +.tooltip.should_panic { + color: rgba(255,0,0,.8); +} + +.information > .should_panic:hover { + color: #f00; +} + +.tooltip.ignore { + color: rgba(255,142,0,.6); +} + +.information > .ignore:hover { + color: #ff9200; +} + +.search-failed a { + color: #0089ff; +} + +.tooltip::after { + background-color: #000; + color: #fff; + border-color: #000; +} + +.tooltip::before { + border-color: transparent black transparent transparent; +} + +.notable-traits-tooltiptext { + background-color: #111; + border-color: #777; +} + +.notable-traits-tooltiptext .notable { + border-bottom-color: #d2d2d2; +} + +#titles > button:not(.selected) { + background-color: #252525; + border-top-color: #252525; +} + +#titles > button:hover, #titles > button.selected { + border-top-color: #0089ff; + background-color: #353535; +} + +#titles > button > div.count { + color: #888; +} + +@media (max-width: 700px) { + .sidebar-elems { + border-right-color: #000; + } +} + +kbd { + color: #000; + background-color: #fafbfc; + border-color: #d1d5da; + border-bottom-color: #c6cbd1; + box-shadow: inset 0 -1px 0 #c6cbd1; +} + +#settings-menu > a, #help-button > button { + border-color: #e0e0e0; + background: #f0f0f0; + color: #000; +} + +#settings-menu > a:hover, #settings-menu > a:focus, +#help-button > button:hover, #help-button > button:focus { + border-color: #ffb900; +} + +.popover, .popover::before, +#help-button span.top, #help-button span.bottom { + border-color: #d2d2d2; +} + +#copy-path { + color: #999; +} +#copy-path > img { + filter: invert(50%); +} +#copy-path:hover > img { + filter: invert(65%); +} + +#theme-choices { + border-color: #e0e0e0; + background-color: #353535; +} + +#theme-choices > button:not(:first-child) { + border-top-color: #e0e0e0; +} + +#theme-choices > button:hover, #theme-choices > button:focus { + background-color: #4e4e4e; +} + +.search-results .result-name span.alias { + color: #fff; +} +.search-results .result-name span.grey { + color: #ccc; +} + +#source-sidebar > .title { + border-bottom-color: #ccc; +} +#source-sidebar div.files > a:hover, details.dir-entry summary:hover, +#source-sidebar div.files > a:focus, details.dir-entry summary:focus { + background-color: #444; +} +#source-sidebar div.files > a.selected { + background-color: #333; +} + +.scraped-example-list .scrape-help { + border-color: #aaa; + color: #eee; +} +.scraped-example-list .scrape-help:hover { + border-color: white; + color: white; +} +.more-examples-toggle summary, .more-examples-toggle .hide-more { + color: #999; +} +.scraped-example .example-wrap .rust span.highlight { + background: rgb(91, 59, 1); +} +.scraped-example .example-wrap .rust span.highlight.focus { + background: rgb(124, 75, 15); +} +.scraped-example:not(.expanded) .code-wrapper:before { + background: linear-gradient(to bottom, rgba(53, 53, 53, 1), rgba(53, 53, 53, 0)); +} +.scraped-example:not(.expanded) .code-wrapper:after { + background: linear-gradient(to top, rgba(53, 53, 53, 1), rgba(53, 53, 53, 0)); +} +.toggle-line-inner { + background: #999; +} +.toggle-line:hover .toggle-line-inner { + background: #c5c5c5; +} diff --git a/src/librustdoc/html/static/css/themes/light.css b/src/librustdoc/html/static/css/themes/light.css new file mode 100644 index 000000000..b751acff1 --- /dev/null +++ b/src/librustdoc/html/static/css/themes/light.css @@ -0,0 +1,395 @@ +:root { + --main-background-color: white; + --main-color: black; + --settings-input-color: #2196f3; + --sidebar-background-color: #F5F5F5; + --sidebar-background-color-hover: #E0E0E0; + --code-block-background-color: #F5F5F5; + --scrollbar-track-background-color: #dcdcdc; + --scrollbar-thumb-background-color: rgba(36, 37, 39, 0.6); + --scrollbar-color: rgba(36, 37, 39, 0.6) #d9d9d9; + --headings-border-bottom-color: #ddd; +} + +.slider { + background-color: #ccc; +} +.slider:before { + background-color: white; +} +input:focus + .slider { + box-shadow: 0 0 0 2px #0a84ff, 0 0 0 6px rgba(10, 132, 255, 0.3); +} + +.in-band { + background-color: white; +} + +.rust-logo { + /* This rule exists to force other themes to explicitly style the logo. + * Rustdoc has a custom linter for this purpose. + */ +} + +.sidebar .current, +.sidebar a:hover { + background-color: #fff; +} + +.line-numbers span { color: #c67e2d; } +.line-numbers .line-highlighted { + background-color: #FDFFD3 !important; +} + +.docblock table td, .docblock table th { + border-color: #ddd; +} + +.search-results a:hover { + background-color: #ddd; +} + +.search-results a:focus { + color: #000 !important; + background-color: #ccc; +} +.search-results a:focus span { color: #000 !important; } +a.result-trait:focus { background-color: #c7b6ff; } +a.result-traitalias:focus { background-color: #c7b6ff; } +a.result-mod:focus, +a.result-externcrate:focus { background-color: #afc6e4; } +a.result-enum:focus { background-color: #e7b1a0; } +a.result-struct:focus { background-color: #e7b1a0; } +a.result-union:focus { background-color: #e7b1a0; } +a.result-fn:focus, +a.result-method:focus, +a.result-tymethod:focus { background-color: #c6afb3; } +a.result-type:focus { background-color: #e7b1a0; } +a.result-associatedtype:focus { background-color: #afc6e4; } +a.result-foreigntype:focus { background-color: #e7b1a0; } +a.result-attr:focus, +a.result-derive:focus, +a.result-macro:focus { background-color: #8ce488; } +a.result-constant:focus, +a.result-static:focus { background-color: #afc6e4; } +a.result-primitive:focus { background-color: #e7b1a0; } +a.result-keyword:focus { background-color: #afc6e4; } + +.content .item-info::before { color: #ccc; } + +.content span.enum, .content a.enum, .block a.current.enum { color: #AD378A; } +.content span.struct, .content a.struct, .block a.current.struct { color: #AD378A; } +.content span.type, .content a.type, .block a.current.type { color: #AD378A; } +.content span.foreigntype, .content a.foreigntype, .block a.current.foreigntype { color: #3873AD; } +.content span.associatedtype, +.content a.associatedtype, +.block a.current.associatedtype { color: #3873AD; } +.content span.attr, .content a.attr, .block a.current.attr, +.content span.derive, .content a.derive, .block a.current.derive, +.content span.macro, .content a.macro, .block a.current.macro { color: #068000; } +.content span.union, .content a.union, .block a.current.union { color: #AD378A; } +.content span.constant, .content a.constant, .block a.current.constant, +.content span.static, .content a.static, .block a.current.static { color: #3873AD; } +.content span.primitive, .content a.primitive, .block a.current.primitive { color: #AD378A; } +.content span.externcrate, +.content span.mod, .content a.mod, .block a.current.mod { color: #3873AD; } +.content span.trait, .content a.trait, .block a.current.trait { color: #6E4FC9; } +.content span.traitalias, .content a.traitalias, .block a.current.traitalias { color: #5137AD; } +.content span.fn, .content a.fn, .block a.current.fn, +.content span.method, .content a.method, .block a.current.method, +.content span.tymethod, .content a.tymethod, .block a.current.tymethod, +.content .fnname { color: #AD7C37; } +.content span.keyword, .content a.keyword, .block a.current.keyword { color: #3873AD; } + +.sidebar a { color: #356da4; } +.sidebar a.current.enum { color: #a63283; } +.sidebar a.current.struct { color: #a63283; } +.sidebar a.current.type { color: #a63283; } +.sidebar a.current.associatedtype { color: #356da4; } +.sidebar a.current.foreigntype { color: #356da4; } +.sidebar a.current.attr, +.sidebar a.current.derive, +.sidebar a.current.macro { color: #067901; } +.sidebar a.current.union { color: #a63283; } +.sidebar a.current.constant +.sidebar a.current.static { color: #356da4; } +.sidebar a.current.primitive { color: #a63283; } +.sidebar a.current.externcrate +.sidebar a.current.mod { color: #356da4; } +.sidebar a.current.trait { color: #6849c3; } +.sidebar a.current.traitalias { color: #4b349e; } +.sidebar a.current.fn, +.sidebar a.current.method, +.sidebar a.current.tymethod { color: #a67736; } +.sidebar a.current.keyword { color: #356da4; } + +nav.main .current { + border-top-color: #000; + border-bottom-color: #000; +} +nav.main .separator { + border: 1px solid #000; +} + +a { + color: #3873AD; +} + +body.source .example-wrap pre.rust a { + background: #eee; +} + +details.rustdoc-toggle > summary.hideme > span, +details.rustdoc-toggle > summary::before { + color: #999; +} + +#crate-search, .search-input { + background-color: white; + border-color: #e0e0e0; +} + +#crate-search { + /* Without the `!important`, the border-color is ignored for `<select>`... + It cannot be in the group above because `.search-input` has a different border color on + hover. */ + border-color: #e0e0e0 !important; +} + +.search-input:focus { + border-color: #66afe9; +} + +.stab.empty-impl { background: #FFF5D6; border-color: #FFC600; } +.stab.unstable { background: #FFF5D6; border-color: #FFC600; } +.stab.deprecated { background: #ffc4c4; border-color: #db7b7b; } +.stab.must_implement { background: #F3DFFF; border-color: #b07bdb; } +.stab.portability { background: #F3DFFF; border-color: #b07bdb; } +.stab.portability > code { background: none; } + +.rightside, +.out-of-band { + color: grey; +} + +.line-numbers :target { background-color: transparent; } + +/* Code highlighting */ +pre.rust .kw { color: #8959A8; } +pre.rust .kw-2, pre.rust .prelude-ty { color: #4271AE; } +pre.rust .number, pre.rust .string { color: #718C00; } +pre.rust .self, pre.rust .bool-val, pre.rust .prelude-val, +pre.rust .attribute, pre.rust .attribute .ident { color: #C82829; } +pre.rust .comment { color: #8E908C; } +pre.rust .doccomment { color: #4D4D4C; } +pre.rust .macro, pre.rust .macro-nonterminal { color: #3E999F; } +pre.rust .lifetime { color: #B76514; } +pre.rust .question-mark { + color: #ff9011; +} + +.example-wrap > pre.line-number { + border-color: #c7c7c7; +} + +a.test-arrow { + color: #f5f5f5; + background-color: rgba(78, 139, 202, 0.2); +} + +a.test-arrow:hover{ + background-color: #4e8bca; +} + +.toggle-label, +.code-attribute { + color: #999; +} + +:target { + background: #FDFFD3; + border-right: 3px solid #AD7C37; +} + +pre.compile_fail { + border-left: 2px solid rgba(255,0,0,.5); +} + +pre.compile_fail:hover, .information:hover + pre.compile_fail { + border-left: 2px solid #f00; +} + +pre.should_panic { + border-left: 2px solid rgba(255,0,0,.5); +} + +pre.should_panic:hover, .information:hover + pre.should_panic { + border-left: 2px solid #f00; +} + +pre.ignore { + border-left: 2px solid rgba(255,142,0,.6); +} + +pre.ignore:hover, .information:hover + pre.ignore { + border-left: 2px solid #ff9200; +} + +.tooltip.compile_fail { + color: rgba(255,0,0,.5); +} + +.information > .compile_fail:hover { + color: #f00; +} + +.tooltip.should_panic { + color: rgba(255,0,0,.5); +} + +.information > .should_panic:hover { + color: #f00; +} + +.tooltip.ignore { + color: rgba(255,142,0,.6); +} + +.information > .ignore:hover { + color: #ff9200; +} + +.search-failed a { + color: #3873AD; +} + +.tooltip::after { + background-color: #000; + color: #fff; +} + +.tooltip::before { + border-color: transparent black transparent transparent; +} + +.notable-traits-tooltiptext { + background-color: #eee; + border-color: #999; +} + +.notable-traits-tooltiptext .notable { + border-bottom-color: #DDDDDD; +} + +#titles > button:not(.selected) { + background-color: #e6e6e6; + border-top-color: #e6e6e6; +} + +#titles > button:hover, #titles > button.selected { + background-color: #ffffff; + border-top-color: #0089ff; +} + +#titles > button > div.count { + color: #888; +} + +@media (max-width: 700px) { + .sidebar-elems { + border-right-color: #000; + } +} + +kbd { + color: #000; + background-color: #fafbfc; + border-color: #d1d5da; + border-bottom-color: #c6cbd1; + box-shadow: inset 0 -1px 0 #c6cbd1; +} + +#settings-menu > a, #help-button > button { + border-color: #e0e0e0; + background-color: #fff; +} + +#settings-menu > a:hover, #settings-menu > a:focus, +#help-button > button:hover, #help-button > button:focus { + border-color: #717171; +} + +.popover, .popover::before, +#help-button span.top, #help-button span.bottom { + border-color: #DDDDDD; +} + +#copy-path { + color: #999; +} +#copy-path > img { + filter: invert(50%); +} +#copy-path:hover > img { + filter: invert(35%); +} + +#theme-choices { + border-color: #ccc; + background-color: #fff; +} + +#theme-choices > button:not(:first-child) { + border-top-color: #e0e0e0; +} + +#theme-choices > button:hover, #theme-choices > button:focus { + background-color: #eee; +} + +.search-results .result-name span.alias { + color: #000; +} +.search-results .result-name span.grey { + color: #999; +} + +#source-sidebar > .title { + border-bottom-color: #ccc; +} +#source-sidebar div.files > a:hover, details.dir-entry summary:hover, +#source-sidebar div.files > a:focus, details.dir-entry summary:focus { + background-color: #E0E0E0; +} +#source-sidebar div.files > a.selected { + background-color: #fff; +} +.scraped-example-list .scrape-help { + border-color: #555; + color: #333; +} +.scraped-example-list .scrape-help:hover { + border-color: black; + color: black; +} +.more-examples-toggle summary, .more-examples-toggle .hide-more { + color: #999; +} +.scraped-example .example-wrap .rust span.highlight { + background: #fcffd6; +} +.scraped-example .example-wrap .rust span.highlight.focus { + background: #f6fdb0; +} +.scraped-example:not(.expanded) .code-wrapper:before { + background: linear-gradient(to bottom, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0)); +} +.scraped-example:not(.expanded) .code-wrapper:after { + background: linear-gradient(to top, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0)); +} +.toggle-line-inner { + background: #ccc; +} +.toggle-line:hover .toggle-line-inner { + background: #999; +} diff --git a/src/librustdoc/html/static/fonts/FiraSans-LICENSE.txt b/src/librustdoc/html/static/fonts/FiraSans-LICENSE.txt new file mode 100644 index 000000000..ff9afab06 --- /dev/null +++ b/src/librustdoc/html/static/fonts/FiraSans-LICENSE.txt @@ -0,0 +1,94 @@ +Digitized data copyright (c) 2012-2015, The Mozilla Foundation and Telefonica S.A. +with Reserved Font Name < Fira >, + +This Font Software is licensed under the SIL Open Font License, Version 1.1. +This license is copied below, and is also available with a FAQ at: +http://scripts.sil.org/OFL + + +----------------------------------------------------------- +SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 +----------------------------------------------------------- + +PREAMBLE +The goals of the Open Font License (OFL) are to stimulate worldwide +development of collaborative font projects, to support the font creation +efforts of academic and linguistic communities, and to provide a free and +open framework in which fonts may be shared and improved in partnership +with others. + +The OFL allows the licensed fonts to be used, studied, modified and +redistributed freely as long as they are not sold by themselves. The +fonts, including any derivative works, can be bundled, embedded, +redistributed and/or sold with any software provided that any reserved +names are not used by derivative works. The fonts and derivatives, +however, cannot be released under any other type of license. The +requirement for fonts to remain under this license does not apply +to any document created using the fonts or their derivatives. + +DEFINITIONS +"Font Software" refers to the set of files released by the Copyright +Holder(s) under this license and clearly marked as such. This may +include source files, build scripts and documentation. + +"Reserved Font Name" refers to any names specified as such after the +copyright statement(s). + +"Original Version" refers to the collection of Font Software components as +distributed by the Copyright Holder(s). + +"Modified Version" refers to any derivative made by adding to, deleting, +or substituting -- in part or in whole -- any of the components of the +Original Version, by changing formats or by porting the Font Software to a +new environment. + +"Author" refers to any designer, engineer, programmer, technical +writer or other person who contributed to the Font Software. + +PERMISSION & CONDITIONS +Permission is hereby granted, free of charge, to any person obtaining +a copy of the Font Software, to use, study, copy, merge, embed, modify, +redistribute, and sell modified and unmodified copies of the Font +Software, subject to the following conditions: + +1) Neither the Font Software nor any of its individual components, +in Original or Modified Versions, may be sold by itself. + +2) Original or Modified Versions of the Font Software may be bundled, +redistributed and/or sold with any software, provided that each copy +contains the above copyright notice and this license. These can be +included either as stand-alone text files, human-readable headers or +in the appropriate machine-readable metadata fields within text or +binary files as long as those fields can be easily viewed by the user. + +3) No Modified Version of the Font Software may use the Reserved Font +Name(s) unless explicit written permission is granted by the corresponding +Copyright Holder. This restriction only applies to the primary font name as +presented to the users. + +4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font +Software shall not be used to promote, endorse or advertise any +Modified Version, except to acknowledge the contribution(s) of the +Copyright Holder(s) and the Author(s) or with their explicit written +permission. + +5) The Font Software, modified or unmodified, in part or in whole, +must be distributed entirely under this license, and must not be +distributed under any other license. The requirement for fonts to +remain under this license does not apply to any document created +using the Font Software. + +TERMINATION +This license becomes null and void if any of the above conditions are +not met. + +DISCLAIMER +THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT +OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE +COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, +INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL +DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM +OTHER DEALINGS IN THE FONT SOFTWARE. diff --git a/src/librustdoc/html/static/fonts/FiraSans-Medium.woff2 b/src/librustdoc/html/static/fonts/FiraSans-Medium.woff2 Binary files differnew file mode 100644 index 000000000..7a1e5fc54 --- /dev/null +++ b/src/librustdoc/html/static/fonts/FiraSans-Medium.woff2 diff --git a/src/librustdoc/html/static/fonts/FiraSans-Regular.woff2 b/src/librustdoc/html/static/fonts/FiraSans-Regular.woff2 Binary files differnew file mode 100644 index 000000000..e766e06cc --- /dev/null +++ b/src/librustdoc/html/static/fonts/FiraSans-Regular.woff2 diff --git a/src/librustdoc/html/static/fonts/NanumBarunGothic-LICENSE.txt b/src/librustdoc/html/static/fonts/NanumBarunGothic-LICENSE.txt new file mode 100644 index 000000000..0bf46682b --- /dev/null +++ b/src/librustdoc/html/static/fonts/NanumBarunGothic-LICENSE.txt @@ -0,0 +1,99 @@ +Copyright (c) 2010, NAVER Corporation (https://www.navercorp.com/), + +with Reserved Font Name Nanum, Naver Nanum, NanumGothic, Naver NanumGothic, +NanumMyeongjo, Naver NanumMyeongjo, NanumBrush, Naver NanumBrush, NanumPen, +Naver NanumPen, Naver NanumGothicEco, NanumGothicEco, Naver NanumMyeongjoEco, +NanumMyeongjoEco, Naver NanumGothicLight, NanumGothicLight, NanumBarunGothic, +Naver NanumBarunGothic, NanumSquareRound, NanumBarunPen, MaruBuri + +This Font Software is licensed under the SIL Open Font License, Version 1.1. +This license is copied below, and is also available with a FAQ at: +http://scripts.sil.org/OFL + + +----------------------------------------------------------- +SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 +----------------------------------------------------------- + +PREAMBLE +The goals of the Open Font License (OFL) are to stimulate worldwide +development of collaborative font projects, to support the font creation +efforts of academic and linguistic communities, and to provide a free and +open framework in which fonts may be shared and improved in partnership +with others. + +The OFL allows the licensed fonts to be used, studied, modified and +redistributed freely as long as they are not sold by themselves. The +fonts, including any derivative works, can be bundled, embedded, +redistributed and/or sold with any software provided that any reserved +names are not used by derivative works. The fonts and derivatives, +however, cannot be released under any other type of license. The +requirement for fonts to remain under this license does not apply +to any document created using the fonts or their derivatives. + +DEFINITIONS +"Font Software" refers to the set of files released by the Copyright +Holder(s) under this license and clearly marked as such. This may +include source files, build scripts and documentation. + +"Reserved Font Name" refers to any names specified as such after the +copyright statement(s). + +"Original Version" refers to the collection of Font Software components as +distributed by the Copyright Holder(s). + +"Modified Version" refers to any derivative made by adding to, deleting, +or substituting -- in part or in whole -- any of the components of the +Original Version, by changing formats or by porting the Font Software to a +new environment. + +"Author" refers to any designer, engineer, programmer, technical +writer or other person who contributed to the Font Software. + +PERMISSION & CONDITIONS +Permission is hereby granted, free of charge, to any person obtaining +a copy of the Font Software, to use, study, copy, merge, embed, modify, +redistribute, and sell modified and unmodified copies of the Font +Software, subject to the following conditions: + +1) Neither the Font Software nor any of its individual components, +in Original or Modified Versions, may be sold by itself. + +2) Original or Modified Versions of the Font Software may be bundled, +redistributed and/or sold with any software, provided that each copy +contains the above copyright notice and this license. These can be +included either as stand-alone text files, human-readable headers or +in the appropriate machine-readable metadata fields within text or +binary files as long as those fields can be easily viewed by the user. + +3) No Modified Version of the Font Software may use the Reserved Font +Name(s) unless explicit written permission is granted by the corresponding +Copyright Holder. This restriction only applies to the primary font name as +presented to the users. + +4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font +Software shall not be used to promote, endorse or advertise any +Modified Version, except to acknowledge the contribution(s) of the +Copyright Holder(s) and the Author(s) or with their explicit written +permission. + +5) The Font Software, modified or unmodified, in part or in whole, +must be distributed entirely under this license, and must not be +distributed under any other license. The requirement for fonts to +remain under this license does not apply to any document created +using the Font Software. + +TERMINATION +This license becomes null and void if any of the above conditions are +not met. + +DISCLAIMER +THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT +OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE +COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, +INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL +DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM +OTHER DEALINGS IN THE FONT SOFTWARE. diff --git a/src/librustdoc/html/static/fonts/NanumBarunGothic.ttf.woff2 b/src/librustdoc/html/static/fonts/NanumBarunGothic.ttf.woff2 Binary files differnew file mode 100644 index 000000000..1866ad4bc --- /dev/null +++ b/src/librustdoc/html/static/fonts/NanumBarunGothic.ttf.woff2 diff --git a/src/librustdoc/html/static/fonts/SourceCodePro-It.ttf.woff2 b/src/librustdoc/html/static/fonts/SourceCodePro-It.ttf.woff2 Binary files differnew file mode 100644 index 000000000..462c34efc --- /dev/null +++ b/src/librustdoc/html/static/fonts/SourceCodePro-It.ttf.woff2 diff --git a/src/librustdoc/html/static/fonts/SourceCodePro-LICENSE.txt b/src/librustdoc/html/static/fonts/SourceCodePro-LICENSE.txt new file mode 100644 index 000000000..07542572e --- /dev/null +++ b/src/librustdoc/html/static/fonts/SourceCodePro-LICENSE.txt @@ -0,0 +1,93 @@ +Copyright 2010, 2012 Adobe Systems Incorporated (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries. + +This Font Software is licensed under the SIL Open Font License, Version 1.1. + +This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL + + +----------------------------------------------------------- +SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 +----------------------------------------------------------- + +PREAMBLE +The goals of the Open Font License (OFL) are to stimulate worldwide +development of collaborative font projects, to support the font creation +efforts of academic and linguistic communities, and to provide a free and +open framework in which fonts may be shared and improved in partnership +with others. + +The OFL allows the licensed fonts to be used, studied, modified and +redistributed freely as long as they are not sold by themselves. The +fonts, including any derivative works, can be bundled, embedded, +redistributed and/or sold with any software provided that any reserved +names are not used by derivative works. The fonts and derivatives, +however, cannot be released under any other type of license. The +requirement for fonts to remain under this license does not apply +to any document created using the fonts or their derivatives. + +DEFINITIONS +"Font Software" refers to the set of files released by the Copyright +Holder(s) under this license and clearly marked as such. This may +include source files, build scripts and documentation. + +"Reserved Font Name" refers to any names specified as such after the +copyright statement(s). + +"Original Version" refers to the collection of Font Software components as +distributed by the Copyright Holder(s). + +"Modified Version" refers to any derivative made by adding to, deleting, +or substituting -- in part or in whole -- any of the components of the +Original Version, by changing formats or by porting the Font Software to a +new environment. + +"Author" refers to any designer, engineer, programmer, technical +writer or other person who contributed to the Font Software. + +PERMISSION & CONDITIONS +Permission is hereby granted, free of charge, to any person obtaining +a copy of the Font Software, to use, study, copy, merge, embed, modify, +redistribute, and sell modified and unmodified copies of the Font +Software, subject to the following conditions: + +1) Neither the Font Software nor any of its individual components, +in Original or Modified Versions, may be sold by itself. + +2) Original or Modified Versions of the Font Software may be bundled, +redistributed and/or sold with any software, provided that each copy +contains the above copyright notice and this license. These can be +included either as stand-alone text files, human-readable headers or +in the appropriate machine-readable metadata fields within text or +binary files as long as those fields can be easily viewed by the user. + +3) No Modified Version of the Font Software may use the Reserved Font +Name(s) unless explicit written permission is granted by the corresponding +Copyright Holder. This restriction only applies to the primary font name as +presented to the users. + +4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font +Software shall not be used to promote, endorse or advertise any +Modified Version, except to acknowledge the contribution(s) of the +Copyright Holder(s) and the Author(s) or with their explicit written +permission. + +5) The Font Software, modified or unmodified, in part or in whole, +must be distributed entirely under this license, and must not be +distributed under any other license. The requirement for fonts to +remain under this license does not apply to any document created +using the Font Software. + +TERMINATION +This license becomes null and void if any of the above conditions are +not met. + +DISCLAIMER +THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT +OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE +COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, +INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL +DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM +OTHER DEALINGS IN THE FONT SOFTWARE. diff --git a/src/librustdoc/html/static/fonts/SourceCodePro-Regular.ttf.woff2 b/src/librustdoc/html/static/fonts/SourceCodePro-Regular.ttf.woff2 Binary files differnew file mode 100644 index 000000000..10b558e0b --- /dev/null +++ b/src/librustdoc/html/static/fonts/SourceCodePro-Regular.ttf.woff2 diff --git a/src/librustdoc/html/static/fonts/SourceCodePro-Semibold.ttf.woff2 b/src/librustdoc/html/static/fonts/SourceCodePro-Semibold.ttf.woff2 Binary files differnew file mode 100644 index 000000000..5ec64eef0 --- /dev/null +++ b/src/librustdoc/html/static/fonts/SourceCodePro-Semibold.ttf.woff2 diff --git a/src/librustdoc/html/static/fonts/SourceSerif4-Bold.ttf.woff2 b/src/librustdoc/html/static/fonts/SourceSerif4-Bold.ttf.woff2 Binary files differnew file mode 100644 index 000000000..db57d2145 --- /dev/null +++ b/src/librustdoc/html/static/fonts/SourceSerif4-Bold.ttf.woff2 diff --git a/src/librustdoc/html/static/fonts/SourceSerif4-It.ttf.woff2 b/src/librustdoc/html/static/fonts/SourceSerif4-It.ttf.woff2 Binary files differnew file mode 100644 index 000000000..1cbc021a3 --- /dev/null +++ b/src/librustdoc/html/static/fonts/SourceSerif4-It.ttf.woff2 diff --git a/src/librustdoc/html/static/fonts/SourceSerif4-LICENSE.md b/src/librustdoc/html/static/fonts/SourceSerif4-LICENSE.md new file mode 100644 index 000000000..68ea18924 --- /dev/null +++ b/src/librustdoc/html/static/fonts/SourceSerif4-LICENSE.md @@ -0,0 +1,93 @@ +Copyright 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries. + +This Font Software is licensed under the SIL Open Font License, Version 1.1. + +This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL + + +----------------------------------------------------------- +SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 +----------------------------------------------------------- + +PREAMBLE +The goals of the Open Font License (OFL) are to stimulate worldwide +development of collaborative font projects, to support the font creation +efforts of academic and linguistic communities, and to provide a free and +open framework in which fonts may be shared and improved in partnership +with others. + +The OFL allows the licensed fonts to be used, studied, modified and +redistributed freely as long as they are not sold by themselves. The +fonts, including any derivative works, can be bundled, embedded, +redistributed and/or sold with any software provided that any reserved +names are not used by derivative works. The fonts and derivatives, +however, cannot be released under any other type of license. The +requirement for fonts to remain under this license does not apply +to any document created using the fonts or their derivatives. + +DEFINITIONS +"Font Software" refers to the set of files released by the Copyright +Holder(s) under this license and clearly marked as such. This may +include source files, build scripts and documentation. + +"Reserved Font Name" refers to any names specified as such after the +copyright statement(s). + +"Original Version" refers to the collection of Font Software components as +distributed by the Copyright Holder(s). + +"Modified Version" refers to any derivative made by adding to, deleting, +or substituting -- in part or in whole -- any of the components of the +Original Version, by changing formats or by porting the Font Software to a +new environment. + +"Author" refers to any designer, engineer, programmer, technical +writer or other person who contributed to the Font Software. + +PERMISSION & CONDITIONS +Permission is hereby granted, free of charge, to any person obtaining +a copy of the Font Software, to use, study, copy, merge, embed, modify, +redistribute, and sell modified and unmodified copies of the Font +Software, subject to the following conditions: + +1) Neither the Font Software nor any of its individual components, +in Original or Modified Versions, may be sold by itself. + +2) Original or Modified Versions of the Font Software may be bundled, +redistributed and/or sold with any software, provided that each copy +contains the above copyright notice and this license. These can be +included either as stand-alone text files, human-readable headers or +in the appropriate machine-readable metadata fields within text or +binary files as long as those fields can be easily viewed by the user. + +3) No Modified Version of the Font Software may use the Reserved Font +Name(s) unless explicit written permission is granted by the corresponding +Copyright Holder. This restriction only applies to the primary font name as +presented to the users. + +4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font +Software shall not be used to promote, endorse or advertise any +Modified Version, except to acknowledge the contribution(s) of the +Copyright Holder(s) and the Author(s) or with their explicit written +permission. + +5) The Font Software, modified or unmodified, in part or in whole, +must be distributed entirely under this license, and must not be +distributed under any other license. The requirement for fonts to +remain under this license does not apply to any document created +using the Font Software. + +TERMINATION +This license becomes null and void if any of the above conditions are +not met. + +DISCLAIMER +THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT +OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. 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\ No newline at end of file diff --git a/src/librustdoc/html/static/js/README.md b/src/librustdoc/html/static/js/README.md new file mode 100644 index 000000000..1fd859ad7 --- /dev/null +++ b/src/librustdoc/html/static/js/README.md @@ -0,0 +1,15 @@ +# Rustdoc JS + +These JavaScript files are incorporated into the rustdoc binary at build time, +and are minified and written to the filesystem as part of the doc build process. + +We use the [Closure Compiler](https://github.com/google/closure-compiler/wiki/Annotating-JavaScript-for-the-Closure-Compiler) +dialect of JSDoc to comment our code and annotate params and return types. +To run a check: + + ./x.py doc library/std + npm i -g google-closure-compiler + google-closure-compiler -W VERBOSE \ + build/<YOUR PLATFORM>/doc/{search-index*.js,crates*.js} \ + src/librustdoc/html/static/js/{search.js,main.js,storage.js} \ + --externs src/librustdoc/html/static/js/externs.js >/dev/null diff --git a/src/librustdoc/html/static/js/externs.js b/src/librustdoc/html/static/js/externs.js new file mode 100644 index 000000000..ecbe15a59 --- /dev/null +++ b/src/librustdoc/html/static/js/externs.js @@ -0,0 +1,142 @@ +// This file contains type definitions that are processed by the Closure Compiler but are +// not put into the JavaScript we include as part of the documentation. It is used for +// type checking. See README.md in this directory for more info. + +/* eslint-disable */ +let searchState; +function initSearch(searchIndex){} + +/** + * @typedef {{ + * name: string, + * fullPath: Array<string>, + * pathWithoutLast: Array<string>, + * pathLast: string, + * generics: Array<QueryElement>, + * }} + */ +let QueryElement; + +/** + * @typedef {{ + * pos: number, + * totalElems: number, + * typeFilter: (null|string), + * userQuery: string, + * }} + */ +let ParserState; + +/** + * @typedef {{ + * original: string, + * userQuery: string, + * typeFilter: number, + * elems: Array<QueryElement>, + * args: Array<QueryElement>, + * returned: Array<QueryElement>, + * foundElems: number, + * }} + */ +let ParsedQuery; + +/** + * @typedef {{ + * crate: string, + * desc: string, + * id: number, + * name: string, + * normalizedName: string, + * parent: (Object|null|undefined), + * path: string, + * ty: (Number|null|number), + * type: (Array<?>|null) + * }} + */ +let Row; + +/** + * @typedef {{ + * in_args: Array<Object>, + * returned: Array<Object>, + * others: Array<Object>, + * query: ParsedQuery, + * }} + */ +let ResultsTable; + +/** + * @typedef {{ + * desc: string, + * displayPath: string, + * fullPath: string, + * href: string, + * id: number, + * lev: number, + * name: string, + * normalizedName: string, + * parent: (Object|undefined), + * path: string, + * ty: number, + * }} + */ +let Results; + +/** + * A pair of [inputs, outputs], or 0 for null. This is stored in the search index. + * The JavaScript deserializes this into FunctionSearchType. + * + * Numeric IDs are *ONE-indexed* into the paths array (`p`). Zero is used as a sentinel for `null` + * because `null` is four bytes while `0` is one byte. + * + * An input or output can be encoded as just a number if there is only one of them, AND + * it has no generics. The no generics rule exists to avoid ambiguity: imagine if you had + * a function with a single output, and that output had a single generic: + * + * fn something() -> Result<usize, usize> + * + * If output was allowed to be any RawFunctionType, it would look like this + * + * [[], [50, [3, 3]]] + * + * The problem is that the above output could be interpreted as either a type with ID 50 and two + * generics, or it could be interpreted as a pair of types, the first one with ID 50 and the second + * with ID 3 and a single generic parameter that is also ID 3. We avoid this ambiguity by choosing + * in favor of the pair of types interpretation. This is why the `(number|Array<RawFunctionType>)` + * is used instead of `(RawFunctionType|Array<RawFunctionType>)`. + * + * @typedef {( + * 0 | + * [(number|Array<RawFunctionType>)] | + * [(number|Array<RawFunctionType>), (number|Array<RawFunctionType>)] + * )} + */ +let RawFunctionSearchType; + +/** + * A single function input or output type. This is either a single path ID, or a pair of + * [path ID, generics]. + * + * Numeric IDs are *ONE-indexed* into the paths array (`p`). Zero is used as a sentinel for `null` + * because `null` is four bytes while `0` is one byte. + * + * @typedef {number | [number, Array<RawFunctionType>]} + */ +let RawFunctionType; + +/** + * @typedef {{ + * inputs: Array<FunctionType>, + * outputs: Array<FunctionType>, + * }} + */ +let FunctionSearchType; + +/** + * @typedef {{ + * name: (null|string), + * ty: (null|number), + * generics: Array<FunctionType>, + * }} + */ +let FunctionType; diff --git a/src/librustdoc/html/static/js/main.js b/src/librustdoc/html/static/js/main.js new file mode 100644 index 000000000..0702b2b0b --- /dev/null +++ b/src/librustdoc/html/static/js/main.js @@ -0,0 +1,974 @@ +// Local js definitions: +/* global addClass, getSettingValue, hasClass, searchState */ +/* global onEach, onEachLazy, removeClass */ + +"use strict"; + +// Get a value from the rustdoc-vars div, which is used to convey data from +// Rust to the JS. If there is no such element, return null. +function getVar(name) { + const el = document.getElementById("rustdoc-vars"); + if (el) { + return el.attributes["data-" + name].value; + } else { + return null; + } +} + +// Given a basename (e.g. "storage") and an extension (e.g. ".js"), return a URL +// for a resource under the root-path, with the resource-suffix. +function resourcePath(basename, extension) { + return getVar("root-path") + basename + getVar("resource-suffix") + extension; +} + +function hideMain() { + addClass(document.getElementById(MAIN_ID), "hidden"); +} + +function showMain() { + removeClass(document.getElementById(MAIN_ID), "hidden"); +} + +function elemIsInParent(elem, parent) { + while (elem && elem !== document.body) { + if (elem === parent) { + return true; + } + elem = elem.parentElement; + } + return false; +} + +function blurHandler(event, parentElem, hideCallback) { + if (!elemIsInParent(document.activeElement, parentElem) && + !elemIsInParent(event.relatedTarget, parentElem) + ) { + hideCallback(); + } +} + +(function() { + window.rootPath = getVar("root-path"); + window.currentCrate = getVar("current-crate"); +}()); + +function setMobileTopbar() { + // FIXME: It would be nicer to generate this text content directly in HTML, + // but with the current code it's hard to get the right information in the right place. + const mobileLocationTitle = document.querySelector(".mobile-topbar h2.location"); + const locationTitle = document.querySelector(".sidebar h2.location"); + if (mobileLocationTitle && locationTitle) { + mobileLocationTitle.innerHTML = locationTitle.innerHTML; + } +} + +// Gets the human-readable string for the virtual-key code of the +// given KeyboardEvent, ev. +// +// This function is meant as a polyfill for KeyboardEvent#key, +// since it is not supported in IE 11 or Chrome for Android. We also test for +// KeyboardEvent#keyCode because the handleShortcut handler is +// also registered for the keydown event, because Blink doesn't fire +// keypress on hitting the Escape key. +// +// So I guess you could say things are getting pretty interoperable. +function getVirtualKey(ev) { + if ("key" in ev && typeof ev.key !== "undefined") { + return ev.key; + } + + const c = ev.charCode || ev.keyCode; + if (c === 27) { + return "Escape"; + } + return String.fromCharCode(c); +} + +const MAIN_ID = "main-content"; +const SETTINGS_BUTTON_ID = "settings-menu"; +const ALTERNATIVE_DISPLAY_ID = "alternative-display"; +const NOT_DISPLAYED_ID = "not-displayed"; +const HELP_BUTTON_ID = "help-button"; + +function getSettingsButton() { + return document.getElementById(SETTINGS_BUTTON_ID); +} + +function getHelpButton() { + return document.getElementById(HELP_BUTTON_ID); +} + +// Returns the current URL without any query parameter or hash. +function getNakedUrl() { + return window.location.href.split("?")[0].split("#")[0]; +} + +/** + * This function inserts `newNode` after `referenceNode`. It doesn't work if `referenceNode` + * doesn't have a parent node. + * + * @param {HTMLElement} newNode + * @param {HTMLElement} referenceNode + */ +function insertAfter(newNode, referenceNode) { + referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling); +} + +/** + * This function creates a new `<section>` with the given `id` and `classes` if it doesn't already + * exist. + * + * More information about this in `switchDisplayedElement` documentation. + * + * @param {string} id + * @param {string} classes + */ +function getOrCreateSection(id, classes) { + let el = document.getElementById(id); + + if (!el) { + el = document.createElement("section"); + el.id = id; + el.className = classes; + insertAfter(el, document.getElementById(MAIN_ID)); + } + return el; +} + +/** + * Returns the `<section>` element which contains the displayed element. + * + * @return {HTMLElement} + */ +function getAlternativeDisplayElem() { + return getOrCreateSection(ALTERNATIVE_DISPLAY_ID, "content hidden"); +} + +/** + * Returns the `<section>` element which contains the not-displayed elements. + * + * @return {HTMLElement} + */ +function getNotDisplayedElem() { + return getOrCreateSection(NOT_DISPLAYED_ID, "hidden"); +} + +/** + * To nicely switch between displayed "extra" elements (such as search results or settings menu) + * and to alternate between the displayed and not displayed elements, we hold them in two different + * `<section>` elements. They work in pair: one holds the hidden elements while the other + * contains the displayed element (there can be only one at the same time!). So basically, we switch + * elements between the two `<section>` elements. + * + * @param {HTMLElement} elemToDisplay + */ +function switchDisplayedElement(elemToDisplay) { + const el = getAlternativeDisplayElem(); + + if (el.children.length > 0) { + getNotDisplayedElem().appendChild(el.firstElementChild); + } + if (elemToDisplay === null) { + addClass(el, "hidden"); + showMain(); + return; + } + el.appendChild(elemToDisplay); + hideMain(); + removeClass(el, "hidden"); +} + +function browserSupportsHistoryApi() { + return window.history && typeof window.history.pushState === "function"; +} + +// eslint-disable-next-line no-unused-vars +function loadCss(cssFileName) { + const link = document.createElement("link"); + link.href = resourcePath(cssFileName, ".css"); + link.type = "text/css"; + link.rel = "stylesheet"; + document.getElementsByTagName("head")[0].appendChild(link); +} + +(function() { + function loadScript(url) { + const script = document.createElement("script"); + script.src = url; + document.head.append(script); + } + + getSettingsButton().onclick = event => { + addClass(getSettingsButton(), "rotate"); + event.preventDefault(); + // Sending request for the CSS and the JS files at the same time so it will + // hopefully be loaded when the JS will generate the settings content. + loadCss("settings"); + loadScript(resourcePath("settings", ".js")); + }; + + window.searchState = { + loadingText: "Loading search results...", + input: document.getElementsByClassName("search-input")[0], + outputElement: () => { + let el = document.getElementById("search"); + if (!el) { + el = document.createElement("section"); + el.id = "search"; + getNotDisplayedElem().appendChild(el); + } + return el; + }, + title: document.title, + titleBeforeSearch: document.title, + timeout: null, + // On the search screen, so you remain on the last tab you opened. + // + // 0 for "In Names" + // 1 for "In Parameters" + // 2 for "In Return Types" + currentTab: 0, + // tab and back preserves the element that was focused. + focusedByTab: [null, null, null], + clearInputTimeout: () => { + if (searchState.timeout !== null) { + clearTimeout(searchState.timeout); + searchState.timeout = null; + } + }, + isDisplayed: () => searchState.outputElement().parentElement.id === ALTERNATIVE_DISPLAY_ID, + // Sets the focus on the search bar at the top of the page + focus: () => { + searchState.input.focus(); + }, + // Removes the focus from the search bar. + defocus: () => { + searchState.input.blur(); + }, + showResults: search => { + if (search === null || typeof search === "undefined") { + search = searchState.outputElement(); + } + switchDisplayedElement(search); + searchState.mouseMovedAfterSearch = false; + document.title = searchState.title; + }, + hideResults: () => { + switchDisplayedElement(null); + document.title = searchState.titleBeforeSearch; + // We also remove the query parameter from the URL. + if (browserSupportsHistoryApi()) { + history.replaceState(null, window.currentCrate + " - Rust", + getNakedUrl() + window.location.hash); + } + }, + getQueryStringParams: () => { + const params = {}; + window.location.search.substring(1).split("&"). + map(s => { + const pair = s.split("="); + params[decodeURIComponent(pair[0])] = + typeof pair[1] === "undefined" ? null : decodeURIComponent(pair[1]); + }); + return params; + }, + setup: () => { + const search_input = searchState.input; + if (!searchState.input) { + return; + } + let searchLoaded = false; + function loadSearch() { + if (!searchLoaded) { + searchLoaded = true; + loadScript(resourcePath("search", ".js")); + loadScript(resourcePath("search-index", ".js")); + } + } + + search_input.addEventListener("focus", () => { + search_input.origPlaceholder = search_input.placeholder; + search_input.placeholder = "Type your search here."; + loadSearch(); + }); + + if (search_input.value !== "") { + loadSearch(); + } + + const params = searchState.getQueryStringParams(); + if (params.search !== undefined) { + const search = searchState.outputElement(); + search.innerHTML = "<h3 class=\"search-loading\">" + + searchState.loadingText + "</h3>"; + searchState.showResults(search); + loadSearch(); + } + }, + }; + + function getPageId() { + if (window.location.hash) { + const tmp = window.location.hash.replace(/^#/, ""); + if (tmp.length > 0) { + return tmp; + } + } + return null; + } + + const toggleAllDocsId = "toggle-all-docs"; + let savedHash = ""; + + function handleHashes(ev) { + if (ev !== null && searchState.isDisplayed() && ev.newURL) { + // This block occurs when clicking on an element in the navbar while + // in a search. + switchDisplayedElement(null); + const hash = ev.newURL.slice(ev.newURL.indexOf("#") + 1); + if (browserSupportsHistoryApi()) { + // `window.location.search`` contains all the query parameters, not just `search`. + history.replaceState(null, "", + getNakedUrl() + window.location.search + "#" + hash); + } + const elem = document.getElementById(hash); + if (elem) { + elem.scrollIntoView(); + } + } + // This part is used in case an element is not visible. + if (savedHash !== window.location.hash) { + savedHash = window.location.hash; + if (savedHash.length === 0) { + return; + } + expandSection(savedHash.slice(1)); // we remove the '#' + } + } + + function onHashChange(ev) { + // If we're in mobile mode, we should hide the sidebar in any case. + const sidebar = document.getElementsByClassName("sidebar")[0]; + removeClass(sidebar, "shown"); + handleHashes(ev); + } + + function openParentDetails(elem) { + while (elem) { + if (elem.tagName === "DETAILS") { + elem.open = true; + } + elem = elem.parentNode; + } + } + + function expandSection(id) { + openParentDetails(document.getElementById(id)); + } + + function handleEscape(ev) { + searchState.clearInputTimeout(); + switchDisplayedElement(null); + if (browserSupportsHistoryApi()) { + history.replaceState(null, window.currentCrate + " - Rust", + getNakedUrl() + window.location.hash); + } + ev.preventDefault(); + searchState.defocus(); + window.hidePopoverMenus(); + } + + function handleShortcut(ev) { + // Don't interfere with browser shortcuts + const disableShortcuts = getSettingValue("disable-shortcuts") === "true"; + if (ev.ctrlKey || ev.altKey || ev.metaKey || disableShortcuts) { + return; + } + + if (document.activeElement.tagName === "INPUT" && + document.activeElement.type !== "checkbox") { + switch (getVirtualKey(ev)) { + case "Escape": + handleEscape(ev); + break; + } + } else { + switch (getVirtualKey(ev)) { + case "Escape": + handleEscape(ev); + break; + + case "s": + case "S": + ev.preventDefault(); + searchState.focus(); + break; + + case "+": + case "-": + ev.preventDefault(); + toggleAllDocs(); + break; + + case "?": + showHelp(); + break; + + default: + break; + } + } + } + + document.addEventListener("keypress", handleShortcut); + document.addEventListener("keydown", handleShortcut); + + function addSidebarItems() { + if (!window.SIDEBAR_ITEMS) { + return; + } + const sidebar = document.getElementsByClassName("sidebar-elems")[0]; + + /** + * Append to the sidebar a "block" of links - a heading along with a list (`<ul>`) of items. + * + * @param {string} shortty - A short type name, like "primitive", "mod", or "macro" + * @param {string} id - The HTML id of the corresponding section on the module page. + * @param {string} longty - A long, capitalized, plural name, like "Primitive Types", + * "Modules", or "Macros". + */ + function block(shortty, id, longty) { + const filtered = window.SIDEBAR_ITEMS[shortty]; + if (!filtered) { + return; + } + + const div = document.createElement("div"); + div.className = "block " + shortty; + const h3 = document.createElement("h3"); + h3.innerHTML = `<a href="index.html#${id}">${longty}</a>`; + div.appendChild(h3); + const ul = document.createElement("ul"); + + for (const item of filtered) { + const name = item[0]; + const desc = item[1]; // can be null + + let klass = shortty; + let path; + if (shortty === "mod") { + path = name + "/index.html"; + } else { + path = shortty + "." + name + ".html"; + } + const current_page = document.location.href.split("/").pop(); + if (path === current_page) { + klass += " current"; + } + const link = document.createElement("a"); + link.href = path; + link.title = desc; + link.className = klass; + link.textContent = name; + const li = document.createElement("li"); + li.appendChild(link); + ul.appendChild(li); + } + div.appendChild(ul); + sidebar.appendChild(div); + } + + if (sidebar) { + block("primitive", "primitives", "Primitive Types"); + block("mod", "modules", "Modules"); + block("macro", "macros", "Macros"); + block("struct", "structs", "Structs"); + block("enum", "enums", "Enums"); + block("union", "unions", "Unions"); + block("constant", "constants", "Constants"); + block("static", "static", "Statics"); + block("trait", "traits", "Traits"); + block("fn", "functions", "Functions"); + block("type", "types", "Type Definitions"); + block("foreigntype", "foreign-types", "Foreign Types"); + block("keyword", "keywords", "Keywords"); + block("traitalias", "trait-aliases", "Trait Aliases"); + } + } + + window.register_implementors = imp => { + const implementors = document.getElementById("implementors-list"); + const synthetic_implementors = document.getElementById("synthetic-implementors-list"); + const inlined_types = new Set(); + + if (synthetic_implementors) { + // This `inlined_types` variable is used to avoid having the same implementation + // showing up twice. For example "String" in the "Sync" doc page. + // + // By the way, this is only used by and useful for traits implemented automatically + // (like "Send" and "Sync"). + onEachLazy(synthetic_implementors.getElementsByClassName("impl"), el => { + const aliases = el.getAttribute("data-aliases"); + if (!aliases) { + return; + } + aliases.split(",").forEach(alias => { + inlined_types.add(alias); + }); + }); + } + + let currentNbImpls = implementors.getElementsByClassName("impl").length; + const traitName = document.querySelector("h1.fqn > .in-band > .trait").textContent; + const baseIdName = "impl-" + traitName + "-"; + const libs = Object.getOwnPropertyNames(imp); + // We don't want to include impls from this JS file, when the HTML already has them. + // The current crate should always be ignored. Other crates that should also be + // ignored are included in the attribute `data-ignore-extern-crates`. + const ignoreExternCrates = document + .querySelector("script[data-ignore-extern-crates]") + .getAttribute("data-ignore-extern-crates"); + for (const lib of libs) { + if (lib === window.currentCrate || ignoreExternCrates.indexOf(lib) !== -1) { + continue; + } + const structs = imp[lib]; + + struct_loop: + for (const struct of structs) { + const list = struct.synthetic ? synthetic_implementors : implementors; + + if (struct.synthetic) { + for (const struct_type of struct.types) { + if (inlined_types.has(struct_type)) { + continue struct_loop; + } + inlined_types.add(struct_type); + } + } + + const code = document.createElement("h3"); + code.innerHTML = struct.text; + addClass(code, "code-header"); + addClass(code, "in-band"); + + onEachLazy(code.getElementsByTagName("a"), elem => { + const href = elem.getAttribute("href"); + + if (href && href.indexOf("http") !== 0) { + elem.setAttribute("href", window.rootPath + href); + } + }); + + const currentId = baseIdName + currentNbImpls; + const anchor = document.createElement("a"); + anchor.href = "#" + currentId; + addClass(anchor, "anchor"); + + const display = document.createElement("div"); + display.id = currentId; + addClass(display, "impl"); + display.appendChild(anchor); + display.appendChild(code); + list.appendChild(display); + currentNbImpls += 1; + } + } + }; + if (window.pending_implementors) { + window.register_implementors(window.pending_implementors); + } + + function addSidebarCrates() { + if (!window.ALL_CRATES) { + return; + } + const sidebarElems = document.getElementsByClassName("sidebar-elems")[0]; + if (!sidebarElems) { + return; + } + // Draw a convenient sidebar of known crates if we have a listing + const div = document.createElement("div"); + div.className = "block crate"; + div.innerHTML = "<h3>Crates</h3>"; + const ul = document.createElement("ul"); + div.appendChild(ul); + + for (const crate of window.ALL_CRATES) { + let klass = "crate"; + if (window.rootPath !== "./" && crate === window.currentCrate) { + klass += " current"; + } + const link = document.createElement("a"); + link.href = window.rootPath + crate + "/index.html"; + link.className = klass; + link.textContent = crate; + + const li = document.createElement("li"); + li.appendChild(link); + ul.appendChild(li); + } + sidebarElems.appendChild(div); + } + + + function labelForToggleButton(sectionIsCollapsed) { + if (sectionIsCollapsed) { + // button will expand the section + return "+"; + } + // button will collapse the section + // note that this text is also set in the HTML template in ../render/mod.rs + return "\u2212"; // "\u2212" is "−" minus sign + } + + function toggleAllDocs() { + const innerToggle = document.getElementById(toggleAllDocsId); + if (!innerToggle) { + return; + } + let sectionIsCollapsed = false; + if (hasClass(innerToggle, "will-expand")) { + removeClass(innerToggle, "will-expand"); + onEachLazy(document.getElementsByClassName("rustdoc-toggle"), e => { + if (!hasClass(e, "type-contents-toggle")) { + e.open = true; + } + }); + innerToggle.title = "collapse all docs"; + } else { + addClass(innerToggle, "will-expand"); + onEachLazy(document.getElementsByClassName("rustdoc-toggle"), e => { + if (e.parentNode.id !== "implementations-list" || + (!hasClass(e, "implementors-toggle") && + !hasClass(e, "type-contents-toggle")) + ) { + e.open = false; + } + }); + sectionIsCollapsed = true; + innerToggle.title = "expand all docs"; + } + innerToggle.children[0].innerText = labelForToggleButton(sectionIsCollapsed); + } + + (function() { + const toggles = document.getElementById(toggleAllDocsId); + if (toggles) { + toggles.onclick = toggleAllDocs; + } + + const hideMethodDocs = getSettingValue("auto-hide-method-docs") === "true"; + const hideImplementations = getSettingValue("auto-hide-trait-implementations") === "true"; + const hideLargeItemContents = getSettingValue("auto-hide-large-items") !== "false"; + + function setImplementorsTogglesOpen(id, open) { + const list = document.getElementById(id); + if (list !== null) { + onEachLazy(list.getElementsByClassName("implementors-toggle"), e => { + e.open = open; + }); + } + } + + if (hideImplementations) { + setImplementorsTogglesOpen("trait-implementations-list", false); + setImplementorsTogglesOpen("blanket-implementations-list", false); + } + + onEachLazy(document.getElementsByClassName("rustdoc-toggle"), e => { + if (!hideLargeItemContents && hasClass(e, "type-contents-toggle")) { + e.open = true; + } + if (hideMethodDocs && hasClass(e, "method-toggle")) { + e.open = false; + } + + }); + + const pageId = getPageId(); + if (pageId !== null) { + expandSection(pageId); + } + }()); + + (function() { + // To avoid checking on "rustdoc-line-numbers" value on every loop... + let lineNumbersFunc = () => {}; + if (getSettingValue("line-numbers") === "true") { + lineNumbersFunc = x => { + const count = x.textContent.split("\n").length; + const elems = []; + for (let i = 0; i < count; ++i) { + elems.push(i + 1); + } + const node = document.createElement("pre"); + addClass(node, "line-number"); + node.innerHTML = elems.join("\n"); + x.parentNode.insertBefore(node, x); + }; + } + onEachLazy(document.getElementsByClassName("rust-example-rendered"), e => { + if (hasClass(e, "compile_fail")) { + e.addEventListener("mouseover", function() { + this.parentElement.previousElementSibling.childNodes[0].style.color = "#f00"; + }); + e.addEventListener("mouseout", function() { + this.parentElement.previousElementSibling.childNodes[0].style.color = ""; + }); + } else if (hasClass(e, "ignore")) { + e.addEventListener("mouseover", function() { + this.parentElement.previousElementSibling.childNodes[0].style.color = "#ff9200"; + }); + e.addEventListener("mouseout", function() { + this.parentElement.previousElementSibling.childNodes[0].style.color = ""; + }); + } + lineNumbersFunc(e); + }); + }()); + + function hideSidebar() { + const sidebar = document.getElementsByClassName("sidebar")[0]; + removeClass(sidebar, "shown"); + } + + function handleClick(id, f) { + const elem = document.getElementById(id); + if (elem) { + elem.addEventListener("click", f); + } + } + handleClick(MAIN_ID, () => { + hideSidebar(); + }); + + onEachLazy(document.getElementsByTagName("a"), el => { + // For clicks on internal links (<A> tags with a hash property), we expand the section we're + // jumping to *before* jumping there. We can't do this in onHashChange, because it changes + // the height of the document so we wind up scrolled to the wrong place. + if (el.hash) { + el.addEventListener("click", () => { + expandSection(el.hash.slice(1)); + hideSidebar(); + }); + } + }); + + onEachLazy(document.querySelectorAll(".rustdoc-toggle > summary:not(.hideme)"), el => { + el.addEventListener("click", e => { + if (e.target.tagName !== "SUMMARY" && e.target.tagName !== "A") { + e.preventDefault(); + } + }); + }); + + onEachLazy(document.getElementsByClassName("notable-traits"), e => { + e.onclick = function() { + this.getElementsByClassName("notable-traits-tooltiptext")[0] + .classList.toggle("force-tooltip"); + }; + }); + + const sidebar_menu_toggle = document.getElementsByClassName("sidebar-menu-toggle")[0]; + if (sidebar_menu_toggle) { + sidebar_menu_toggle.addEventListener("click", () => { + const sidebar = document.getElementsByClassName("sidebar")[0]; + if (!hasClass(sidebar, "shown")) { + addClass(sidebar, "shown"); + } else { + removeClass(sidebar, "shown"); + } + }); + } + + function helpBlurHandler(event) { + blurHandler(event, getHelpButton(), window.hidePopoverMenus); + } + + function buildHelpMenu() { + const book_info = document.createElement("span"); + book_info.className = "top"; + book_info.innerHTML = "You can find more information in \ + <a href=\"https://doc.rust-lang.org/rustdoc/\">the rustdoc book</a>."; + + const shortcuts = [ + ["?", "Show this help dialog"], + ["S", "Focus the search field"], + ["↑", "Move up in search results"], + ["↓", "Move down in search results"], + ["← / →", "Switch result tab (when results focused)"], + ["⏎", "Go to active search result"], + ["+", "Expand all sections"], + ["-", "Collapse all sections"], + ].map(x => "<dt>" + + x[0].split(" ") + .map((y, index) => ((index & 1) === 0 ? "<kbd>" + y + "</kbd>" : " " + y + " ")) + .join("") + "</dt><dd>" + x[1] + "</dd>").join(""); + const div_shortcuts = document.createElement("div"); + addClass(div_shortcuts, "shortcuts"); + div_shortcuts.innerHTML = "<h2>Keyboard Shortcuts</h2><dl>" + shortcuts + "</dl></div>"; + + const infos = [ + "Prefix searches with a type followed by a colon (e.g., <code>fn:</code>) to \ + restrict the search to a given item kind.", + "Accepted kinds are: <code>fn</code>, <code>mod</code>, <code>struct</code>, \ + <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, \ + and <code>const</code>.", + "Search functions by type signature (e.g., <code>vec -> usize</code> or \ + <code>-> vec</code>)", + "Search multiple things at once by splitting your query with comma (e.g., \ + <code>str,u8</code> or <code>String,struct:Vec,test</code>)", + "You can look for items with an exact name by putting double quotes around \ + your request: <code>\"string\"</code>", + "Look for items inside another one by searching for a path: <code>vec::Vec</code>", + ].map(x => "<p>" + x + "</p>").join(""); + const div_infos = document.createElement("div"); + addClass(div_infos, "infos"); + div_infos.innerHTML = "<h2>Search Tricks</h2>" + infos; + + const rustdoc_version = document.createElement("span"); + rustdoc_version.className = "bottom"; + const rustdoc_version_code = document.createElement("code"); + rustdoc_version_code.innerText = "rustdoc " + getVar("rustdoc-version"); + rustdoc_version.appendChild(rustdoc_version_code); + + const container = document.createElement("div"); + container.className = "popover"; + container.style.display = "none"; + + const side_by_side = document.createElement("div"); + side_by_side.className = "side-by-side"; + side_by_side.appendChild(div_shortcuts); + side_by_side.appendChild(div_infos); + + container.appendChild(book_info); + container.appendChild(side_by_side); + container.appendChild(rustdoc_version); + + const help_button = getHelpButton(); + help_button.appendChild(container); + + container.onblur = helpBlurHandler; + container.onclick = event => { + event.preventDefault(); + }; + help_button.onblur = helpBlurHandler; + help_button.children[0].onblur = helpBlurHandler; + + return container; + } + + /** + * Hide all the popover menus. + */ + window.hidePopoverMenus = function() { + onEachLazy(document.querySelectorAll(".search-container .popover"), elem => { + elem.style.display = "none"; + }); + }; + + /** + * Returns the help menu element (not the button). + * + * @param {boolean} buildNeeded - If this argument is `false`, the help menu element won't be + * built if it doesn't exist. + * + * @return {HTMLElement} + */ + function getHelpMenu(buildNeeded) { + let menu = getHelpButton().querySelector(".popover"); + if (!menu && buildNeeded) { + menu = buildHelpMenu(); + } + return menu; + } + + /** + * Show the help popup menu. + */ + function showHelp() { + const menu = getHelpMenu(true); + if (menu.style.display === "none") { + window.hidePopoverMenus(); + menu.style.display = ""; + } + } + + document.querySelector(`#${HELP_BUTTON_ID} > button`).addEventListener("click", event => { + const target = event.target; + if (target.tagName !== "BUTTON" || target.parentElement.id !== HELP_BUTTON_ID) { + return; + } + const menu = getHelpMenu(true); + const shouldShowHelp = menu.style.display === "none"; + if (shouldShowHelp) { + showHelp(); + } else { + window.hidePopoverMenus(); + } + }); + + setMobileTopbar(); + addSidebarItems(); + addSidebarCrates(); + onHashChange(null); + window.addEventListener("hashchange", onHashChange); + searchState.setup(); +}()); + +(function() { + let reset_button_timeout = null; + + window.copy_path = but => { + const parent = but.parentElement; + const path = []; + + onEach(parent.childNodes, child => { + if (child.tagName === "A") { + path.push(child.textContent); + } + }); + + const el = document.createElement("textarea"); + el.value = path.join("::"); + el.setAttribute("readonly", ""); + // To not make it appear on the screen. + el.style.position = "absolute"; + el.style.left = "-9999px"; + + document.body.appendChild(el); + el.select(); + document.execCommand("copy"); + document.body.removeChild(el); + + // There is always one children, but multiple childNodes. + but.children[0].style.display = "none"; + + let tmp; + if (but.childNodes.length < 2) { + tmp = document.createTextNode("✓"); + but.appendChild(tmp); + } else { + onEachLazy(but.childNodes, e => { + if (e.nodeType === Node.TEXT_NODE) { + tmp = e; + return true; + } + }); + tmp.textContent = "✓"; + } + + if (reset_button_timeout !== null) { + window.clearTimeout(reset_button_timeout); + } + + function reset_button() { + tmp.textContent = ""; + reset_button_timeout = null; + but.children[0].style.display = ""; + } + + reset_button_timeout = window.setTimeout(reset_button, 1000); + }; +}()); diff --git a/src/librustdoc/html/static/js/scrape-examples.js b/src/librustdoc/html/static/js/scrape-examples.js new file mode 100644 index 000000000..fd7a14497 --- /dev/null +++ b/src/librustdoc/html/static/js/scrape-examples.js @@ -0,0 +1,106 @@ +/* global addClass, hasClass, removeClass, onEachLazy */ + +"use strict"; + +(function() { + // Number of lines shown when code viewer is not expanded + const MAX_LINES = 10; + + // Scroll code block to the given code location + function scrollToLoc(elt, loc) { + const lines = elt.querySelector(".line-numbers"); + let scrollOffset; + + // If the block is greater than the size of the viewer, + // then scroll to the top of the block. Otherwise scroll + // to the middle of the block. + if (loc[1] - loc[0] > MAX_LINES) { + const line = Math.max(0, loc[0] - 1); + scrollOffset = lines.children[line].offsetTop; + } else { + const wrapper = elt.querySelector(".code-wrapper"); + const halfHeight = wrapper.offsetHeight / 2; + const offsetMid = (lines.children[loc[0]].offsetTop + + lines.children[loc[1]].offsetTop) / 2; + scrollOffset = offsetMid - halfHeight; + } + + lines.scrollTo(0, scrollOffset); + elt.querySelector(".rust").scrollTo(0, scrollOffset); + } + + function updateScrapedExample(example) { + const locs = JSON.parse(example.attributes.getNamedItem("data-locs").textContent); + let locIndex = 0; + const highlights = Array.prototype.slice.call(example.querySelectorAll(".highlight")); + const link = example.querySelector(".scraped-example-title a"); + + if (locs.length > 1) { + // Toggle through list of examples in a given file + const onChangeLoc = changeIndex => { + removeClass(highlights[locIndex], "focus"); + changeIndex(); + scrollToLoc(example, locs[locIndex][0]); + addClass(highlights[locIndex], "focus"); + + const url = locs[locIndex][1]; + const title = locs[locIndex][2]; + + link.href = url; + link.innerHTML = title; + }; + + example.querySelector(".prev") + .addEventListener("click", () => { + onChangeLoc(() => { + locIndex = (locIndex - 1 + locs.length) % locs.length; + }); + }); + + example.querySelector("next") + .addEventListener("click", () => { + onChangeLoc(() => { + locIndex = (locIndex + 1) % locs.length; + }); + }); + } + + const expandButton = example.querySelector(".expand"); + if (expandButton) { + expandButton.addEventListener("click", () => { + if (hasClass(example, "expanded")) { + removeClass(example, "expanded"); + scrollToLoc(example, locs[0][0]); + } else { + addClass(example, "expanded"); + } + }); + } + + // Start with the first example in view + scrollToLoc(example, locs[0][0]); + } + + const firstExamples = document.querySelectorAll(".scraped-example-list > .scraped-example"); + onEachLazy(firstExamples, updateScrapedExample); + onEachLazy(document.querySelectorAll(".more-examples-toggle"), toggle => { + // Allow users to click the left border of the <details> section to close it, + // since the section can be large and finding the [+] button is annoying. + onEachLazy(toggle.querySelectorAll(".toggle-line, .hide-more"), button => { + button.addEventListener("click", () => { + toggle.open = false; + }); + }); + + const moreExamples = toggle.querySelectorAll(".scraped-example"); + toggle.querySelector("summary").addEventListener("click", () => { + // Wrapping in setTimeout ensures the update happens after the elements are actually + // visible. This is necessary since updateScrapedExample calls scrollToLoc which + // depends on offsetHeight, a property that requires an element to be visible to + // compute correctly. + setTimeout(() => { + onEachLazy(moreExamples, updateScrapedExample); + }); + }, {once: true}); + }); +})(); diff --git a/src/librustdoc/html/static/js/search.js b/src/librustdoc/html/static/js/search.js new file mode 100644 index 000000000..75c7bd45a --- /dev/null +++ b/src/librustdoc/html/static/js/search.js @@ -0,0 +1,2297 @@ +/* global addClass, getNakedUrl, getSettingValue */ +/* global onEachLazy, removeClass, searchState, browserSupportsHistoryApi, exports */ + +"use strict"; + +(function() { +// This mapping table should match the discriminants of +// `rustdoc::formats::item_type::ItemType` type in Rust. +const itemTypes = [ + "mod", + "externcrate", + "import", + "struct", + "enum", + "fn", + "type", + "static", + "trait", + "impl", + "tymethod", + "method", + "structfield", + "variant", + "macro", + "primitive", + "associatedtype", + "constant", + "associatedconstant", + "union", + "foreigntype", + "keyword", + "existential", + "attr", + "derive", + "traitalias", +]; + +// used for special search precedence +const TY_PRIMITIVE = itemTypes.indexOf("primitive"); +const TY_KEYWORD = itemTypes.indexOf("keyword"); +const ROOT_PATH = typeof window !== "undefined" ? window.rootPath : "../"; + +function hasOwnPropertyRustdoc(obj, property) { + return Object.prototype.hasOwnProperty.call(obj, property); +} + +// In the search display, allows to switch between tabs. +function printTab(nb) { + let iter = 0; + let foundCurrentTab = false; + let foundCurrentResultSet = false; + onEachLazy(document.getElementById("titles").childNodes, elem => { + if (nb === iter) { + addClass(elem, "selected"); + foundCurrentTab = true; + } else { + removeClass(elem, "selected"); + } + iter += 1; + }); + iter = 0; + onEachLazy(document.getElementById("results").childNodes, elem => { + if (nb === iter) { + addClass(elem, "active"); + foundCurrentResultSet = true; + } else { + removeClass(elem, "active"); + } + iter += 1; + }); + if (foundCurrentTab && foundCurrentResultSet) { + searchState.currentTab = nb; + } else if (nb !== 0) { + printTab(0); + } +} + +/** + * A function to compute the Levenshtein distance between two strings + * Licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported + * Full License can be found at http://creativecommons.org/licenses/by-sa/3.0/legalcode + * This code is an unmodified version of the code written by Marco de Wit + * and was found at https://stackoverflow.com/a/18514751/745719 + */ +const levenshtein_row2 = []; +function levenshtein(s1, s2) { + if (s1 === s2) { + return 0; + } + const s1_len = s1.length, s2_len = s2.length; + if (s1_len && s2_len) { + let i1 = 0, i2 = 0, a, b, c, c2; + const row = levenshtein_row2; + while (i1 < s1_len) { + row[i1] = ++i1; + } + while (i2 < s2_len) { + c2 = s2.charCodeAt(i2); + a = i2; + ++i2; + b = i2; + for (i1 = 0; i1 < s1_len; ++i1) { + c = a + (s1.charCodeAt(i1) !== c2 ? 1 : 0); + a = row[i1]; + b = b < a ? (b < c ? b + 1 : c) : (a < c ? a + 1 : c); + row[i1] = b; + } + } + return b; + } + return s1_len + s2_len; +} + +function initSearch(rawSearchIndex) { + const MAX_LEV_DISTANCE = 3; + const MAX_RESULTS = 200; + const NO_TYPE_FILTER = -1; + /** + * @type {Array<Row>} + */ + let searchIndex; + let currentResults; + const ALIASES = Object.create(null); + + function isWhitespace(c) { + return " \t\n\r".indexOf(c) !== -1; + } + + function isSpecialStartCharacter(c) { + return "<\"".indexOf(c) !== -1; + } + + function isEndCharacter(c) { + return ",>-".indexOf(c) !== -1; + } + + function isStopCharacter(c) { + return isWhitespace(c) || isEndCharacter(c); + } + + function isErrorCharacter(c) { + return "()".indexOf(c) !== -1; + } + + function itemTypeFromName(typename) { + for (let i = 0, len = itemTypes.length; i < len; ++i) { + if (itemTypes[i] === typename) { + return i; + } + } + + throw new Error("Unknown type filter `" + typename + "`"); + } + + /** + * If we encounter a `"`, then we try to extract the string from it until we find another `"`. + * + * This function will throw an error in the following cases: + * * There is already another string element. + * * We are parsing a generic argument. + * * There is more than one element. + * * There is no closing `"`. + * + * @param {ParsedQuery} query + * @param {ParserState} parserState + * @param {boolean} isInGenerics + */ + function getStringElem(query, parserState, isInGenerics) { + if (isInGenerics) { + throw new Error("`\"` cannot be used in generics"); + } else if (query.literalSearch) { + throw new Error("Cannot have more than one literal search element"); + } else if (parserState.totalElems - parserState.genericsElems > 0) { + throw new Error("Cannot use literal search when there is more than one element"); + } + parserState.pos += 1; + const start = parserState.pos; + const end = getIdentEndPosition(parserState); + if (parserState.pos >= parserState.length) { + throw new Error("Unclosed `\"`"); + } else if (parserState.userQuery[end] !== "\"") { + throw new Error(`Unexpected \`${parserState.userQuery[end]}\` in a string element`); + } else if (start === end) { + throw new Error("Cannot have empty string element"); + } + // To skip the quote at the end. + parserState.pos += 1; + query.literalSearch = true; + } + + /** + * Returns `true` if the current parser position is starting with "::". + * + * @param {ParserState} parserState + * + * @return {boolean} + */ + function isPathStart(parserState) { + return parserState.userQuery.slice(parserState.pos, parserState.pos + 2) === "::"; + } + + /** + * Returns `true` if the current parser position is starting with "->". + * + * @param {ParserState} parserState + * + * @return {boolean} + */ + function isReturnArrow(parserState) { + return parserState.userQuery.slice(parserState.pos, parserState.pos + 2) === "->"; + } + + /** + * Returns `true` if the given `c` character is valid for an ident. + * + * @param {string} c + * + * @return {boolean} + */ + function isIdentCharacter(c) { + return ( + c === "_" || + (c >= "0" && c <= "9") || + (c >= "a" && c <= "z") || + (c >= "A" && c <= "Z")); + } + + /** + * Returns `true` if the given `c` character is a separator. + * + * @param {string} c + * + * @return {boolean} + */ + function isSeparatorCharacter(c) { + return c === "," || isWhitespaceCharacter(c); + } + + /** + * Returns `true` if the given `c` character is a whitespace. + * + * @param {string} c + * + * @return {boolean} + */ + function isWhitespaceCharacter(c) { + return c === " " || c === "\t"; + } + + /** + * @param {ParsedQuery} query + * @param {ParserState} parserState + * @param {string} name - Name of the query element. + * @param {Array<QueryElement>} generics - List of generics of this query element. + * + * @return {QueryElement} - The newly created `QueryElement`. + */ + function createQueryElement(query, parserState, name, generics, isInGenerics) { + if (name === "*" || (name.length === 0 && generics.length === 0)) { + return; + } + if (query.literalSearch && parserState.totalElems - parserState.genericsElems > 0) { + throw new Error("You cannot have more than one element if you use quotes"); + } + const pathSegments = name.split("::"); + if (pathSegments.length > 1) { + for (let i = 0, len = pathSegments.length; i < len; ++i) { + const pathSegment = pathSegments[i]; + + if (pathSegment.length === 0) { + if (i === 0) { + throw new Error("Paths cannot start with `::`"); + } else if (i + 1 === len) { + throw new Error("Paths cannot end with `::`"); + } + throw new Error("Unexpected `::::`"); + } + } + } + // In case we only have something like `<p>`, there is no name. + if (pathSegments.length === 0 || (pathSegments.length === 1 && pathSegments[0] === "")) { + throw new Error("Found generics without a path"); + } + parserState.totalElems += 1; + if (isInGenerics) { + parserState.genericsElems += 1; + } + return { + name: name, + fullPath: pathSegments, + pathWithoutLast: pathSegments.slice(0, pathSegments.length - 1), + pathLast: pathSegments[pathSegments.length - 1], + generics: generics, + }; + } + + /** + * This function goes through all characters until it reaches an invalid ident character or the + * end of the query. It returns the position of the last character of the ident. + * + * @param {ParserState} parserState + * + * @return {integer} + */ + function getIdentEndPosition(parserState) { + let end = parserState.pos; + let foundExclamation = false; + while (parserState.pos < parserState.length) { + const c = parserState.userQuery[parserState.pos]; + if (!isIdentCharacter(c)) { + if (c === "!") { + if (foundExclamation) { + throw new Error("Cannot have more than one `!` in an ident"); + } else if (parserState.pos + 1 < parserState.length && + isIdentCharacter(parserState.userQuery[parserState.pos + 1]) + ) { + throw new Error("`!` can only be at the end of an ident"); + } + foundExclamation = true; + } else if (isErrorCharacter(c)) { + throw new Error(`Unexpected \`${c}\``); + } else if ( + isStopCharacter(c) || + isSpecialStartCharacter(c) || + isSeparatorCharacter(c) + ) { + break; + } else if (c === ":") { // If we allow paths ("str::string" for example). + if (!isPathStart(parserState)) { + break; + } + // Skip current ":". + parserState.pos += 1; + foundExclamation = false; + } else { + throw new Error(`Unexpected \`${c}\``); + } + } + parserState.pos += 1; + end = parserState.pos; + } + return end; + } + + /** + * @param {ParsedQuery} query + * @param {ParserState} parserState + * @param {Array<QueryElement>} elems - This is where the new {QueryElement} will be added. + * @param {boolean} isInGenerics + */ + function getNextElem(query, parserState, elems, isInGenerics) { + const generics = []; + + let start = parserState.pos; + let end; + // We handle the strings on their own mostly to make code easier to follow. + if (parserState.userQuery[parserState.pos] === "\"") { + start += 1; + getStringElem(query, parserState, isInGenerics); + end = parserState.pos - 1; + } else { + end = getIdentEndPosition(parserState); + } + if (parserState.pos < parserState.length && + parserState.userQuery[parserState.pos] === "<" + ) { + if (isInGenerics) { + throw new Error("Unexpected `<` after `<`"); + } else if (start >= end) { + throw new Error("Found generics without a path"); + } + parserState.pos += 1; + getItemsBefore(query, parserState, generics, ">"); + } + if (start >= end && generics.length === 0) { + return; + } + elems.push( + createQueryElement( + query, + parserState, + parserState.userQuery.slice(start, end), + generics, + isInGenerics + ) + ); + } + + /** + * This function parses the next query element until it finds `endChar`, calling `getNextElem` + * to collect each element. + * + * If there is no `endChar`, this function will implicitly stop at the end without raising an + * error. + * + * @param {ParsedQuery} query + * @param {ParserState} parserState + * @param {Array<QueryElement>} elems - This is where the new {QueryElement} will be added. + * @param {string} endChar - This function will stop when it'll encounter this + * character. + */ + function getItemsBefore(query, parserState, elems, endChar) { + let foundStopChar = true; + + while (parserState.pos < parserState.length) { + const c = parserState.userQuery[parserState.pos]; + if (c === endChar) { + break; + } else if (isSeparatorCharacter(c)) { + parserState.pos += 1; + foundStopChar = true; + continue; + } else if (c === ":" && isPathStart(parserState)) { + throw new Error("Unexpected `::`: paths cannot start with `::`"); + } else if (c === ":" || isEndCharacter(c)) { + let extra = ""; + if (endChar === ">") { + extra = "`<`"; + } else if (endChar === "") { + extra = "`->`"; + } + throw new Error("Unexpected `" + c + "` after " + extra); + } + if (!foundStopChar) { + if (endChar !== "") { + throw new Error(`Expected \`,\`, \` \` or \`${endChar}\`, found \`${c}\``); + } + throw new Error(`Expected \`,\` or \` \`, found \`${c}\``); + } + const posBefore = parserState.pos; + getNextElem(query, parserState, elems, endChar === ">"); + // This case can be encountered if `getNextElem` encounted a "stop character" right from + // the start. For example if you have `,,` or `<>`. In this case, we simply move up the + // current position to continue the parsing. + if (posBefore === parserState.pos) { + parserState.pos += 1; + } + foundStopChar = false; + } + // We are either at the end of the string or on the `endChar`` character, let's move forward + // in any case. + parserState.pos += 1; + } + + /** + * Checks that the type filter doesn't have unwanted characters like `<>` (which are ignored + * if empty). + * + * @param {ParserState} parserState + */ + function checkExtraTypeFilterCharacters(parserState) { + const query = parserState.userQuery; + + for (let pos = 0; pos < parserState.pos; ++pos) { + if (!isIdentCharacter(query[pos]) && !isWhitespaceCharacter(query[pos])) { + throw new Error(`Unexpected \`${query[pos]}\` in type filter`); + } + } + } + + /** + * Parses the provided `query` input to fill `parserState`. If it encounters an error while + * parsing `query`, it'll throw an error. + * + * @param {ParsedQuery} query + * @param {ParserState} parserState + */ + function parseInput(query, parserState) { + let c, before; + let foundStopChar = true; + + while (parserState.pos < parserState.length) { + c = parserState.userQuery[parserState.pos]; + if (isStopCharacter(c)) { + foundStopChar = true; + if (isSeparatorCharacter(c)) { + parserState.pos += 1; + continue; + } else if (c === "-" || c === ">") { + if (isReturnArrow(parserState)) { + break; + } + throw new Error(`Unexpected \`${c}\` (did you mean \`->\`?)`); + } + throw new Error(`Unexpected \`${c}\``); + } else if (c === ":" && !isPathStart(parserState)) { + if (parserState.typeFilter !== null) { + throw new Error("Unexpected `:`"); + } + if (query.elems.length === 0) { + throw new Error("Expected type filter before `:`"); + } else if (query.elems.length !== 1 || parserState.totalElems !== 1) { + throw new Error("Unexpected `:`"); + } else if (query.literalSearch) { + throw new Error("You cannot use quotes on type filter"); + } + checkExtraTypeFilterCharacters(parserState); + // The type filter doesn't count as an element since it's a modifier. + parserState.typeFilter = query.elems.pop().name; + parserState.pos += 1; + parserState.totalElems = 0; + query.literalSearch = false; + foundStopChar = true; + continue; + } + if (!foundStopChar) { + if (parserState.typeFilter !== null) { + throw new Error(`Expected \`,\`, \` \` or \`->\`, found \`${c}\``); + } + throw new Error(`Expected \`,\`, \` \`, \`:\` or \`->\`, found \`${c}\``); + } + before = query.elems.length; + getNextElem(query, parserState, query.elems, false); + if (query.elems.length === before) { + // Nothing was added, weird... Let's increase the position to not remain stuck. + parserState.pos += 1; + } + foundStopChar = false; + } + while (parserState.pos < parserState.length) { + c = parserState.userQuery[parserState.pos]; + if (isReturnArrow(parserState)) { + parserState.pos += 2; + // Get returned elements. + getItemsBefore(query, parserState, query.returned, ""); + // Nothing can come afterward! + if (query.returned.length === 0) { + throw new Error("Expected at least one item after `->`"); + } + break; + } else { + parserState.pos += 1; + } + } + } + + /** + * Takes the user search input and returns an empty `ParsedQuery`. + * + * @param {string} userQuery + * + * @return {ParsedQuery} + */ + function newParsedQuery(userQuery) { + return { + original: userQuery, + userQuery: userQuery.toLowerCase(), + typeFilter: NO_TYPE_FILTER, + elems: [], + returned: [], + // Total number of "top" elements (does not include generics). + foundElems: 0, + literalSearch: false, + error: null, + }; + } + + /** + * Build an URL with search parameters. + * + * @param {string} search - The current search being performed. + * @param {string|null} filterCrates - The current filtering crate (if any). + * + * @return {string} + */ + function buildUrl(search, filterCrates) { + let extra = "?search=" + encodeURIComponent(search); + + if (filterCrates !== null) { + extra += "&filter-crate=" + encodeURIComponent(filterCrates); + } + return getNakedUrl() + extra + window.location.hash; + } + + /** + * Return the filtering crate or `null` if there is none. + * + * @return {string|null} + */ + function getFilterCrates() { + const elem = document.getElementById("crate-search"); + + if (elem && + elem.value !== "All crates" && + hasOwnPropertyRustdoc(rawSearchIndex, elem.value) + ) { + return elem.value; + } + return null; + } + + /** + * Parses the query. + * + * The supported syntax by this parser is as follow: + * + * ident = *(ALPHA / DIGIT / "_") [!] + * path = ident *(DOUBLE-COLON ident) + * arg = path [generics] + * arg-without-generic = path + * type-sep = COMMA/WS *(COMMA/WS) + * nonempty-arg-list = *(type-sep) arg *(type-sep arg) *(type-sep) + * nonempty-arg-list-without-generics = *(type-sep) arg-without-generic + * *(type-sep arg-without-generic) *(type-sep) + * generics = OPEN-ANGLE-BRACKET [ nonempty-arg-list-without-generics ] *(type-sep) + * CLOSE-ANGLE-BRACKET/EOF + * return-args = RETURN-ARROW *(type-sep) nonempty-arg-list + * + * exact-search = [type-filter *WS COLON] [ RETURN-ARROW ] *WS QUOTE ident QUOTE [ generics ] + * type-search = [type-filter *WS COLON] [ nonempty-arg-list ] [ return-args ] + * + * query = *WS (exact-search / type-search) *WS + * + * type-filter = ( + * "mod" / + * "externcrate" / + * "import" / + * "struct" / + * "enum" / + * "fn" / + * "type" / + * "static" / + * "trait" / + * "impl" / + * "tymethod" / + * "method" / + * "structfield" / + * "variant" / + * "macro" / + * "primitive" / + * "associatedtype" / + * "constant" / + * "associatedconstant" / + * "union" / + * "foreigntype" / + * "keyword" / + * "existential" / + * "attr" / + * "derive" / + * "traitalias") + * + * OPEN-ANGLE-BRACKET = "<" + * CLOSE-ANGLE-BRACKET = ">" + * COLON = ":" + * DOUBLE-COLON = "::" + * QUOTE = %x22 + * COMMA = "," + * RETURN-ARROW = "->" + * + * ALPHA = %x41-5A / %x61-7A ; A-Z / a-z + * DIGIT = %x30-39 + * WS = %x09 / " " + * + * @param {string} val - The user query + * + * @return {ParsedQuery} - The parsed query + */ + function parseQuery(userQuery) { + userQuery = userQuery.trim(); + const parserState = { + length: userQuery.length, + pos: 0, + // Total number of elements (includes generics). + totalElems: 0, + genericsElems: 0, + typeFilter: null, + userQuery: userQuery.toLowerCase(), + }; + let query = newParsedQuery(userQuery); + + try { + parseInput(query, parserState); + if (parserState.typeFilter !== null) { + let typeFilter = parserState.typeFilter; + if (typeFilter === "const") { + typeFilter = "constant"; + } + query.typeFilter = itemTypeFromName(typeFilter); + } + } catch (err) { + query = newParsedQuery(userQuery); + query.error = err.message; + query.typeFilter = -1; + return query; + } + + if (!query.literalSearch) { + // If there is more than one element in the query, we switch to literalSearch in any + // case. + query.literalSearch = parserState.totalElems > 1; + } + query.foundElems = query.elems.length + query.returned.length; + return query; + } + + /** + * Creates the query results. + * + * @param {Array<Result>} results_in_args + * @param {Array<Result>} results_returned + * @param {Array<Result>} results_in_args + * @param {ParsedQuery} parsedQuery + * + * @return {ResultsTable} + */ + function createQueryResults(results_in_args, results_returned, results_others, parsedQuery) { + return { + "in_args": results_in_args, + "returned": results_returned, + "others": results_others, + "query": parsedQuery, + }; + } + + /** + * Executes the parsed query and builds a {ResultsTable}. + * + * @param {ParsedQuery} parsedQuery - The parsed user query + * @param {Object} searchWords - The list of search words to query against + * @param {Object} [filterCrates] - Crate to search in if defined + * @param {Object} [currentCrate] - Current crate, to rank results from this crate higher + * + * @return {ResultsTable} + */ + function execQuery(parsedQuery, searchWords, filterCrates, currentCrate) { + const results_others = {}, results_in_args = {}, results_returned = {}; + + function transformResults(results) { + const duplicates = {}; + const out = []; + + for (const result of results) { + if (result.id > -1) { + const obj = searchIndex[result.id]; + obj.lev = result.lev; + const res = buildHrefAndPath(obj); + obj.displayPath = pathSplitter(res[0]); + obj.fullPath = obj.displayPath + obj.name; + // To be sure than it some items aren't considered as duplicate. + obj.fullPath += "|" + obj.ty; + + if (duplicates[obj.fullPath]) { + continue; + } + duplicates[obj.fullPath] = true; + + obj.href = res[1]; + out.push(obj); + if (out.length >= MAX_RESULTS) { + break; + } + } + } + return out; + } + + function sortResults(results, isType, preferredCrate) { + const userQuery = parsedQuery.userQuery; + const ar = []; + for (const entry in results) { + if (hasOwnPropertyRustdoc(results, entry)) { + const result = results[entry]; + result.word = searchWords[result.id]; + result.item = searchIndex[result.id] || {}; + ar.push(result); + } + } + results = ar; + // if there are no results then return to default and fail + if (results.length === 0) { + return []; + } + + results.sort((aaa, bbb) => { + let a, b; + + // sort by exact match with regard to the last word (mismatch goes later) + a = (aaa.word !== userQuery); + b = (bbb.word !== userQuery); + if (a !== b) { + return a - b; + } + + // Sort by non levenshtein results and then levenshtein results by the distance + // (less changes required to match means higher rankings) + a = (aaa.lev); + b = (bbb.lev); + if (a !== b) { + return a - b; + } + + // sort by crate (current crate comes first) + a = (aaa.item.crate !== preferredCrate); + b = (bbb.item.crate !== preferredCrate); + if (a !== b) { + return a - b; + } + + // sort by item name length (longer goes later) + a = aaa.word.length; + b = bbb.word.length; + if (a !== b) { + return a - b; + } + + // sort by item name (lexicographically larger goes later) + a = aaa.word; + b = bbb.word; + if (a !== b) { + return (a > b ? +1 : -1); + } + + // sort by index of keyword in item name (no literal occurrence goes later) + a = (aaa.index < 0); + b = (bbb.index < 0); + if (a !== b) { + return a - b; + } + // (later literal occurrence, if any, goes later) + a = aaa.index; + b = bbb.index; + if (a !== b) { + return a - b; + } + + // special precedence for primitive and keyword pages + if ((aaa.item.ty === TY_PRIMITIVE && bbb.item.ty !== TY_KEYWORD) || + (aaa.item.ty === TY_KEYWORD && bbb.item.ty !== TY_PRIMITIVE)) { + return -1; + } + if ((bbb.item.ty === TY_PRIMITIVE && aaa.item.ty !== TY_PRIMITIVE) || + (bbb.item.ty === TY_KEYWORD && aaa.item.ty !== TY_KEYWORD)) { + return 1; + } + + // sort by description (no description goes later) + a = (aaa.item.desc === ""); + b = (bbb.item.desc === ""); + if (a !== b) { + return a - b; + } + + // sort by type (later occurrence in `itemTypes` goes later) + a = aaa.item.ty; + b = bbb.item.ty; + if (a !== b) { + return a - b; + } + + // sort by path (lexicographically larger goes later) + a = aaa.item.path; + b = bbb.item.path; + if (a !== b) { + return (a > b ? +1 : -1); + } + + // que sera, sera + return 0; + }); + + let nameSplit = null; + if (parsedQuery.elems.length === 1) { + const hasPath = typeof parsedQuery.elems[0].path === "undefined"; + nameSplit = hasPath ? null : parsedQuery.elems[0].path; + } + + for (const result of results) { + // this validation does not make sense when searching by types + if (result.dontValidate) { + continue; + } + const name = result.item.name.toLowerCase(), + path = result.item.path.toLowerCase(), + parent = result.item.parent; + + if (!isType && !validateResult(name, path, nameSplit, parent)) { + result.id = -1; + } + } + return transformResults(results); + } + + /** + * This function checks if the object (`row`) generics match the given type (`elem`) + * generics. If there are no generics on `row`, `defaultLev` is returned. + * + * @param {Row} row - The object to check. + * @param {QueryElement} elem - The element from the parsed query. + * @param {integer} defaultLev - This is the value to return in case there are no generics. + * + * @return {integer} - Returns the best match (if any) or `MAX_LEV_DISTANCE + 1`. + */ + function checkGenerics(row, elem, defaultLev) { + if (row.generics.length === 0) { + return elem.generics.length === 0 ? defaultLev : MAX_LEV_DISTANCE + 1; + } else if (row.generics.length > 0 && row.generics[0].name === null) { + return checkGenerics(row.generics[0], elem, defaultLev); + } + // The names match, but we need to be sure that all generics kinda + // match as well. + let elem_name; + if (elem.generics.length > 0 && row.generics.length >= elem.generics.length) { + const elems = Object.create(null); + for (const entry of row.generics) { + elem_name = entry.name; + if (elem_name === "") { + // Pure generic, needs to check into it. + if (checkGenerics(entry, elem, MAX_LEV_DISTANCE + 1) !== 0) { + return MAX_LEV_DISTANCE + 1; + } + continue; + } + if (elems[elem_name] === undefined) { + elems[elem_name] = 0; + } + elems[elem_name] += 1; + } + // We need to find the type that matches the most to remove it in order + // to move forward. + for (const generic of elem.generics) { + let match = null; + if (elems[generic.name]) { + match = generic.name; + } else { + for (elem_name in elems) { + if (!hasOwnPropertyRustdoc(elems, elem_name)) { + continue; + } + if (elem_name === generic) { + match = elem_name; + break; + } + } + } + if (match === null) { + return MAX_LEV_DISTANCE + 1; + } + elems[match] -= 1; + if (elems[match] === 0) { + delete elems[match]; + } + } + return 0; + } + return MAX_LEV_DISTANCE + 1; + } + + /** + * This function checks if the object (`row`) matches the given type (`elem`) and its + * generics (if any). + * + * @param {Row} row + * @param {QueryElement} elem - The element from the parsed query. + * + * @return {integer} - Returns a Levenshtein distance to the best match. + */ + function checkIfInGenerics(row, elem) { + let lev = MAX_LEV_DISTANCE + 1; + for (const entry of row.generics) { + lev = Math.min(checkType(entry, elem, true), lev); + if (lev === 0) { + break; + } + } + return lev; + } + + /** + * This function checks if the object (`row`) matches the given type (`elem`) and its + * generics (if any). + * + * @param {Row} row + * @param {QueryElement} elem - The element from the parsed query. + * @param {boolean} literalSearch + * + * @return {integer} - Returns a Levenshtein distance to the best match. If there is + * no match, returns `MAX_LEV_DISTANCE + 1`. + */ + function checkType(row, elem, literalSearch) { + if (row.name === null) { + // This is a pure "generic" search, no need to run other checks. + if (row.generics.length > 0) { + return checkIfInGenerics(row, elem); + } + return MAX_LEV_DISTANCE + 1; + } + + let lev = levenshtein(row.name, elem.name); + if (literalSearch) { + if (lev !== 0) { + // The name didn't match, let's try to check if the generics do. + if (elem.generics.length === 0) { + const checkGeneric = row.generics.length > 0; + if (checkGeneric && row.generics + .findIndex(tmp_elem => tmp_elem.name === elem.name) !== -1) { + return 0; + } + } + return MAX_LEV_DISTANCE + 1; + } else if (elem.generics.length > 0) { + return checkGenerics(row, elem, MAX_LEV_DISTANCE + 1); + } + return 0; + } else if (row.generics.length > 0) { + if (elem.generics.length === 0) { + if (lev === 0) { + return 0; + } + // The name didn't match so we now check if the type we're looking for is inside + // the generics! + lev = checkIfInGenerics(row, elem); + // Now whatever happens, the returned distance is "less good" so we should mark + // it as such, and so we add 0.5 to the distance to make it "less good". + return lev + 0.5; + } else if (lev > MAX_LEV_DISTANCE) { + // So our item's name doesn't match at all and has generics. + // + // Maybe it's present in a sub generic? For example "f<A<B<C>>>()", if we're + // looking for "B<C>", we'll need to go down. + return checkIfInGenerics(row, elem); + } else { + // At this point, the name kinda match and we have generics to check, so + // let's go! + const tmp_lev = checkGenerics(row, elem, lev); + if (tmp_lev > MAX_LEV_DISTANCE) { + return MAX_LEV_DISTANCE + 1; + } + // We compute the median value of both checks and return it. + return (tmp_lev + lev) / 2; + } + } else if (elem.generics.length > 0) { + // In this case, we were expecting generics but there isn't so we simply reject this + // one. + return MAX_LEV_DISTANCE + 1; + } + // No generics on our query or on the target type so we can return without doing + // anything else. + return lev; + } + + /** + * This function checks if the object (`row`) has an argument with the given type (`elem`). + * + * @param {Row} row + * @param {QueryElement} elem - The element from the parsed query. + * @param {integer} typeFilter + * + * @return {integer} - Returns a Levenshtein distance to the best match. If there is no + * match, returns `MAX_LEV_DISTANCE + 1`. + */ + function findArg(row, elem, typeFilter) { + let lev = MAX_LEV_DISTANCE + 1; + + if (row && row.type && row.type.inputs && row.type.inputs.length > 0) { + for (const input of row.type.inputs) { + if (!typePassesFilter(typeFilter, input.ty)) { + continue; + } + lev = Math.min(lev, checkType(input, elem, parsedQuery.literalSearch)); + if (lev === 0) { + return 0; + } + } + } + return parsedQuery.literalSearch ? MAX_LEV_DISTANCE + 1 : lev; + } + + /** + * This function checks if the object (`row`) returns the given type (`elem`). + * + * @param {Row} row + * @param {QueryElement} elem - The element from the parsed query. + * @param {integer} typeFilter + * + * @return {integer} - Returns a Levenshtein distance to the best match. If there is no + * match, returns `MAX_LEV_DISTANCE + 1`. + */ + function checkReturned(row, elem, typeFilter) { + let lev = MAX_LEV_DISTANCE + 1; + + if (row && row.type && row.type.output.length > 0) { + const ret = row.type.output; + for (const ret_ty of ret) { + if (!typePassesFilter(typeFilter, ret_ty.ty)) { + continue; + } + lev = Math.min(lev, checkType(ret_ty, elem, parsedQuery.literalSearch)); + if (lev === 0) { + return 0; + } + } + } + return parsedQuery.literalSearch ? MAX_LEV_DISTANCE + 1 : lev; + } + + function checkPath(contains, ty) { + if (contains.length === 0) { + return 0; + } + let ret_lev = MAX_LEV_DISTANCE + 1; + const path = ty.path.split("::"); + + if (ty.parent && ty.parent.name) { + path.push(ty.parent.name.toLowerCase()); + } + + const length = path.length; + const clength = contains.length; + if (clength > length) { + return MAX_LEV_DISTANCE + 1; + } + for (let i = 0; i < length; ++i) { + if (i + clength > length) { + break; + } + let lev_total = 0; + let aborted = false; + for (let x = 0; x < clength; ++x) { + const lev = levenshtein(path[i + x], contains[x]); + if (lev > MAX_LEV_DISTANCE) { + aborted = true; + break; + } + lev_total += lev; + } + if (!aborted) { + ret_lev = Math.min(ret_lev, Math.round(lev_total / clength)); + } + } + return ret_lev; + } + + function typePassesFilter(filter, type) { + // No filter or Exact mach + if (filter <= NO_TYPE_FILTER || filter === type) return true; + + // Match related items + const name = itemTypes[type]; + switch (itemTypes[filter]) { + case "constant": + return name === "associatedconstant"; + case "fn": + return name === "method" || name === "tymethod"; + case "type": + return name === "primitive" || name === "associatedtype"; + case "trait": + return name === "traitalias"; + } + + // No match + return false; + } + + function createAliasFromItem(item) { + return { + crate: item.crate, + name: item.name, + path: item.path, + desc: item.desc, + ty: item.ty, + parent: item.parent, + type: item.type, + is_alias: true, + }; + } + + function handleAliases(ret, query, filterCrates, currentCrate) { + const lowerQuery = query.toLowerCase(); + // We separate aliases and crate aliases because we want to have current crate + // aliases to be before the others in the displayed results. + const aliases = []; + const crateAliases = []; + if (filterCrates !== null) { + if (ALIASES[filterCrates] && ALIASES[filterCrates][lowerQuery]) { + const query_aliases = ALIASES[filterCrates][lowerQuery]; + for (const alias of query_aliases) { + aliases.push(createAliasFromItem(searchIndex[alias])); + } + } + } else { + Object.keys(ALIASES).forEach(crate => { + if (ALIASES[crate][lowerQuery]) { + const pushTo = crate === currentCrate ? crateAliases : aliases; + const query_aliases = ALIASES[crate][lowerQuery]; + for (const alias of query_aliases) { + pushTo.push(createAliasFromItem(searchIndex[alias])); + } + } + }); + } + + const sortFunc = (aaa, bbb) => { + if (aaa.path < bbb.path) { + return 1; + } else if (aaa.path === bbb.path) { + return 0; + } + return -1; + }; + crateAliases.sort(sortFunc); + aliases.sort(sortFunc); + + const pushFunc = alias => { + alias.alias = query; + const res = buildHrefAndPath(alias); + alias.displayPath = pathSplitter(res[0]); + alias.fullPath = alias.displayPath + alias.name; + alias.href = res[1]; + + ret.others.unshift(alias); + if (ret.others.length > MAX_RESULTS) { + ret.others.pop(); + } + }; + + aliases.forEach(pushFunc); + crateAliases.forEach(pushFunc); + } + + /** + * This function adds the given result into the provided `results` map if it matches the + * following condition: + * + * * If it is a "literal search" (`parsedQuery.literalSearch`), then `lev` must be 0. + * * If it is not a "literal search", `lev` must be <= `MAX_LEV_DISTANCE`. + * + * The `results` map contains information which will be used to sort the search results: + * + * * `fullId` is a `string`` used as the key of the object we use for the `results` map. + * * `id` is the index in both `searchWords` and `searchIndex` arrays for this element. + * * `index` is an `integer`` used to sort by the position of the word in the item's name. + * * `lev` is the main metric used to sort the search results. + * + * @param {Results} results + * @param {string} fullId + * @param {integer} id + * @param {integer} index + * @param {integer} lev + */ + function addIntoResults(results, fullId, id, index, lev) { + if (lev === 0 || (!parsedQuery.literalSearch && lev <= MAX_LEV_DISTANCE)) { + if (results[fullId] !== undefined) { + const result = results[fullId]; + if (result.dontValidate || result.lev <= lev) { + return; + } + } + results[fullId] = { + id: id, + index: index, + dontValidate: parsedQuery.literalSearch, + lev: lev, + }; + } + } + + /** + * This function is called in case the query is only one element (with or without generics). + * This element will be compared to arguments' and returned values' items and also to items. + * + * Other important thing to note: since there is only one element, we use levenshtein + * distance for name comparisons. + * + * @param {Row} row + * @param {integer} pos - Position in the `searchIndex`. + * @param {QueryElement} elem - The element from the parsed query. + * @param {Results} results_others - Unqualified results (not in arguments nor in + * returned values). + * @param {Results} results_in_args - Matching arguments results. + * @param {Results} results_returned - Matching returned arguments results. + */ + function handleSingleArg( + row, + pos, + elem, + results_others, + results_in_args, + results_returned + ) { + if (!row || (filterCrates !== null && row.crate !== filterCrates)) { + return; + } + let lev, lev_add = 0, index = -1; + const fullId = row.id; + + const in_args = findArg(row, elem, parsedQuery.typeFilter); + const returned = checkReturned(row, elem, parsedQuery.typeFilter); + + addIntoResults(results_in_args, fullId, pos, index, in_args); + addIntoResults(results_returned, fullId, pos, index, returned); + + if (!typePassesFilter(parsedQuery.typeFilter, row.ty)) { + return; + } + const searchWord = searchWords[pos]; + + if (parsedQuery.literalSearch) { + if (searchWord === elem.name) { + addIntoResults(results_others, fullId, pos, -1, 0); + } + return; + } + + // No need to check anything else if it's a "pure" generics search. + if (elem.name.length === 0) { + if (row.type !== null) { + lev = checkGenerics(row.type, elem, MAX_LEV_DISTANCE + 1); + addIntoResults(results_others, fullId, pos, index, lev); + } + return; + } + + if (elem.fullPath.length > 1) { + lev = checkPath(elem.pathWithoutLast, row); + if (lev > MAX_LEV_DISTANCE || (parsedQuery.literalSearch && lev !== 0)) { + return; + } else if (lev > 0) { + lev_add = lev / 10; + } + } + + if (searchWord.indexOf(elem.pathLast) > -1 || + row.normalizedName.indexOf(elem.pathLast) > -1 + ) { + index = row.normalizedName.indexOf(elem.pathLast); + } + lev = levenshtein(searchWord, elem.pathLast); + if (lev > 0 && elem.pathLast.length > 2 && searchWord.indexOf(elem.pathLast) > -1) { + if (elem.pathLast.length < 6) { + lev = 1; + } else { + lev = 0; + } + } + lev += lev_add; + if (lev > MAX_LEV_DISTANCE) { + return; + } else if (index !== -1 && elem.fullPath.length < 2) { + lev -= 1; + } + if (lev < 0) { + lev = 0; + } + addIntoResults(results_others, fullId, pos, index, lev); + } + + /** + * This function is called in case the query has more than one element. In this case, it'll + * try to match the items which validates all the elements. For `aa -> bb` will look for + * functions which have a parameter `aa` and has `bb` in its returned values. + * + * @param {Row} row + * @param {integer} pos - Position in the `searchIndex`. + * @param {Object} results + */ + function handleArgs(row, pos, results) { + if (!row || (filterCrates !== null && row.crate !== filterCrates)) { + return; + } + + let totalLev = 0; + let nbLev = 0; + + // If the result is too "bad", we return false and it ends this search. + function checkArgs(elems, callback) { + for (const elem of elems) { + // There is more than one parameter to the query so all checks should be "exact" + const lev = callback(row, elem, NO_TYPE_FILTER); + if (lev <= 1) { + nbLev += 1; + totalLev += lev; + } else { + return false; + } + } + return true; + } + if (!checkArgs(parsedQuery.elems, findArg)) { + return; + } + if (!checkArgs(parsedQuery.returned, checkReturned)) { + return; + } + + if (nbLev === 0) { + return; + } + const lev = Math.round(totalLev / nbLev); + addIntoResults(results, row.id, pos, 0, lev); + } + + function innerRunQuery() { + let elem, i, nSearchWords, in_returned, row; + + if (parsedQuery.foundElems === 1) { + if (parsedQuery.elems.length === 1) { + elem = parsedQuery.elems[0]; + for (i = 0, nSearchWords = searchWords.length; i < nSearchWords; ++i) { + // It means we want to check for this element everywhere (in names, args and + // returned). + handleSingleArg( + searchIndex[i], + i, + elem, + results_others, + results_in_args, + results_returned + ); + } + } else if (parsedQuery.returned.length === 1) { + // We received one returned argument to check, so looking into returned values. + elem = parsedQuery.returned[0]; + for (i = 0, nSearchWords = searchWords.length; i < nSearchWords; ++i) { + row = searchIndex[i]; + in_returned = checkReturned(row, elem, parsedQuery.typeFilter); + addIntoResults(results_others, row.id, i, -1, in_returned); + } + } + } else if (parsedQuery.foundElems > 0) { + for (i = 0, nSearchWords = searchWords.length; i < nSearchWords; ++i) { + handleArgs(searchIndex[i], i, results_others); + } + } + } + + if (parsedQuery.error === null) { + innerRunQuery(); + } + + const ret = createQueryResults( + sortResults(results_in_args, true, currentCrate), + sortResults(results_returned, true, currentCrate), + sortResults(results_others, false, currentCrate), + parsedQuery); + handleAliases(ret, parsedQuery.original.replace(/"/g, ""), filterCrates, currentCrate); + if (parsedQuery.error !== null && ret.others.length !== 0) { + // It means some doc aliases were found so let's "remove" the error! + ret.query.error = null; + } + return ret; + } + + /** + * Validate performs the following boolean logic. For example: + * "File::open" will give IF A PARENT EXISTS => ("file" && "open") + * exists in (name || path || parent) OR => ("file" && "open") exists in + * (name || path ) + * + * This could be written functionally, but I wanted to minimise + * functions on stack. + * + * @param {string} name - The name of the result + * @param {string} path - The path of the result + * @param {string} keys - The keys to be used (["file", "open"]) + * @param {Object} parent - The parent of the result + * + * @return {boolean} - Whether the result is valid or not + */ + function validateResult(name, path, keys, parent) { + if (!keys || !keys.length) { + return true; + } + for (const key of keys) { + // each check is for validation so we negate the conditions and invalidate + if (!( + // check for an exact name match + name.indexOf(key) > -1 || + // then an exact path match + path.indexOf(key) > -1 || + // next if there is a parent, check for exact parent match + (parent !== undefined && parent.name !== undefined && + parent.name.toLowerCase().indexOf(key) > -1) || + // lastly check to see if the name was a levenshtein match + levenshtein(name, key) <= MAX_LEV_DISTANCE)) { + return false; + } + } + return true; + } + + function nextTab(direction) { + const next = (searchState.currentTab + direction + 3) % searchState.focusedByTab.length; + searchState.focusedByTab[searchState.currentTab] = document.activeElement; + printTab(next); + focusSearchResult(); + } + + // Focus the first search result on the active tab, or the result that + // was focused last time this tab was active. + function focusSearchResult() { + const target = searchState.focusedByTab[searchState.currentTab] || + document.querySelectorAll(".search-results.active a").item(0) || + document.querySelectorAll("#titles > button").item(searchState.currentTab); + if (target) { + target.focus(); + } + } + + function buildHrefAndPath(item) { + let displayPath; + let href; + const type = itemTypes[item.ty]; + const name = item.name; + let path = item.path; + + if (type === "mod") { + displayPath = path + "::"; + href = ROOT_PATH + path.replace(/::/g, "/") + "/" + + name + "/index.html"; + } else if (type === "import") { + displayPath = item.path + "::"; + href = ROOT_PATH + item.path.replace(/::/g, "/") + "/index.html#reexport." + name; + } else if (type === "primitive" || type === "keyword") { + displayPath = ""; + href = ROOT_PATH + path.replace(/::/g, "/") + + "/" + type + "." + name + ".html"; + } else if (type === "externcrate") { + displayPath = ""; + href = ROOT_PATH + name + "/index.html"; + } else if (item.parent !== undefined) { + const myparent = item.parent; + let anchor = "#" + type + "." + name; + const parentType = itemTypes[myparent.ty]; + let pageType = parentType; + let pageName = myparent.name; + + if (parentType === "primitive") { + displayPath = myparent.name + "::"; + } else if (type === "structfield" && parentType === "variant") { + // Structfields belonging to variants are special: the + // final path element is the enum name. + const enumNameIdx = item.path.lastIndexOf("::"); + const enumName = item.path.substr(enumNameIdx + 2); + path = item.path.substr(0, enumNameIdx); + displayPath = path + "::" + enumName + "::" + myparent.name + "::"; + anchor = "#variant." + myparent.name + ".field." + name; + pageType = "enum"; + pageName = enumName; + } else { + displayPath = path + "::" + myparent.name + "::"; + } + href = ROOT_PATH + path.replace(/::/g, "/") + + "/" + pageType + + "." + pageName + + ".html" + anchor; + } else { + displayPath = item.path + "::"; + href = ROOT_PATH + item.path.replace(/::/g, "/") + + "/" + type + "." + name + ".html"; + } + return [displayPath, href]; + } + + function escape(content) { + const h1 = document.createElement("h1"); + h1.textContent = content; + return h1.innerHTML; + } + + function pathSplitter(path) { + const tmp = "<span>" + path.replace(/::/g, "::</span><span>"); + if (tmp.endsWith("<span>")) { + return tmp.slice(0, tmp.length - 6); + } + return tmp; + } + + /** + * Render a set of search results for a single tab. + * @param {Array<?>} array - The search results for this tab + * @param {ParsedQuery} query + * @param {boolean} display - True if this is the active tab + */ + function addTab(array, query, display) { + let extraClass = ""; + if (display === true) { + extraClass = " active"; + } + + const output = document.createElement("div"); + let length = 0; + if (array.length > 0) { + output.className = "search-results " + extraClass; + + array.forEach(item => { + const name = item.name; + const type = itemTypes[item.ty]; + + length += 1; + + let extra = ""; + if (type === "primitive") { + extra = " <i>(primitive type)</i>"; + } else if (type === "keyword") { + extra = " <i>(keyword)</i>"; + } + + const link = document.createElement("a"); + link.className = "result-" + type; + link.href = item.href; + + const wrapper = document.createElement("div"); + const resultName = document.createElement("div"); + resultName.className = "result-name"; + + if (item.is_alias) { + const alias = document.createElement("span"); + alias.className = "alias"; + + const bold = document.createElement("b"); + bold.innerText = item.alias; + alias.appendChild(bold); + + alias.insertAdjacentHTML( + "beforeend", + "<span class=\"grey\"><i> - see </i></span>"); + + resultName.appendChild(alias); + } + resultName.insertAdjacentHTML( + "beforeend", + item.displayPath + "<span class=\"" + type + "\">" + name + extra + "</span>"); + wrapper.appendChild(resultName); + + const description = document.createElement("div"); + description.className = "desc"; + const spanDesc = document.createElement("span"); + spanDesc.insertAdjacentHTML("beforeend", item.desc); + + description.appendChild(spanDesc); + wrapper.appendChild(description); + link.appendChild(wrapper); + output.appendChild(link); + }); + } else if (query.error === null) { + output.className = "search-failed" + extraClass; + output.innerHTML = "No results :(<br/>" + + "Try on <a href=\"https://duckduckgo.com/?q=" + + encodeURIComponent("rust " + query.userQuery) + + "\">DuckDuckGo</a>?<br/><br/>" + + "Or try looking in one of these:<ul><li>The <a " + + "href=\"https://doc.rust-lang.org/reference/index.html\">Rust Reference</a> " + + " for technical details about the language.</li><li><a " + + "href=\"https://doc.rust-lang.org/rust-by-example/index.html\">Rust By " + + "Example</a> for expository code examples.</a></li><li>The <a " + + "href=\"https://doc.rust-lang.org/book/index.html\">Rust Book</a> for " + + "introductions to language features and the language itself.</li><li><a " + + "href=\"https://docs.rs\">Docs.rs</a> for documentation of crates released on" + + " <a href=\"https://crates.io/\">crates.io</a>.</li></ul>"; + } + return [output, length]; + } + + function makeTabHeader(tabNb, text, nbElems) { + if (searchState.currentTab === tabNb) { + return "<button class=\"selected\">" + text + + " <div class=\"count\">(" + nbElems + ")</div></button>"; + } + return "<button>" + text + " <div class=\"count\">(" + nbElems + ")</div></button>"; + } + + /** + * @param {ResultsTable} results + * @param {boolean} go_to_first + * @param {string} filterCrates + */ + function showResults(results, go_to_first, filterCrates) { + const search = searchState.outputElement(); + if (go_to_first || (results.others.length === 1 + && getSettingValue("go-to-only-result") === "true" + // By default, the search DOM element is "empty" (meaning it has no children not + // text content). Once a search has been run, it won't be empty, even if you press + // ESC or empty the search input (which also "cancels" the search). + && (!search.firstChild || search.firstChild.innerText !== searchState.loadingText)) + ) { + const elem = document.createElement("a"); + elem.href = results.others[0].href; + removeClass(elem, "active"); + // For firefox, we need the element to be in the DOM so it can be clicked. + document.body.appendChild(elem); + elem.click(); + return; + } + if (results.query === undefined) { + results.query = parseQuery(searchState.input.value); + } + + currentResults = results.query.userQuery; + + const ret_others = addTab(results.others, results.query, true); + const ret_in_args = addTab(results.in_args, results.query, false); + const ret_returned = addTab(results.returned, results.query, false); + + // Navigate to the relevant tab if the current tab is empty, like in case users search + // for "-> String". If they had selected another tab previously, they have to click on + // it again. + let currentTab = searchState.currentTab; + if ((currentTab === 0 && ret_others[1] === 0) || + (currentTab === 1 && ret_in_args[1] === 0) || + (currentTab === 2 && ret_returned[1] === 0)) { + if (ret_others[1] !== 0) { + currentTab = 0; + } else if (ret_in_args[1] !== 0) { + currentTab = 1; + } else if (ret_returned[1] !== 0) { + currentTab = 2; + } + } + + let crates = ""; + const crates_list = Object.keys(rawSearchIndex); + if (crates_list.length > 1) { + crates = " in <select id=\"crate-search\"><option value=\"All crates\">" + + "All crates</option>"; + for (const c of crates_list) { + crates += `<option value="${c}" ${c === filterCrates && "selected"}>${c}</option>`; + } + crates += "</select>"; + } + + let typeFilter = ""; + if (results.query.typeFilter !== NO_TYPE_FILTER) { + typeFilter = " (type: " + escape(itemTypes[results.query.typeFilter]) + ")"; + } + + let output = "<div id=\"search-settings\">" + + `<h1 class="search-results-title">Results for ${escape(results.query.userQuery)}` + + `${typeFilter}</h1>${crates}</div>`; + if (results.query.error !== null) { + output += `<h3>Query parser error: "${results.query.error}".</h3>`; + output += "<div id=\"titles\">" + + makeTabHeader(0, "In Names", ret_others[1]) + + "</div>"; + currentTab = 0; + } else if (results.query.foundElems <= 1 && results.query.returned.length === 0) { + output += "<div id=\"titles\">" + + makeTabHeader(0, "In Names", ret_others[1]) + + makeTabHeader(1, "In Parameters", ret_in_args[1]) + + makeTabHeader(2, "In Return Types", ret_returned[1]) + + "</div>"; + } else { + const signatureTabTitle = + results.query.elems.length === 0 ? "In Function Return Types" : + results.query.returned.length === 0 ? "In Function Parameters" : + "In Function Signatures"; + output += "<div id=\"titles\">" + + makeTabHeader(0, signatureTabTitle, ret_others[1]) + + "</div>"; + currentTab = 0; + } + + const resultsElem = document.createElement("div"); + resultsElem.id = "results"; + resultsElem.appendChild(ret_others[0]); + resultsElem.appendChild(ret_in_args[0]); + resultsElem.appendChild(ret_returned[0]); + + search.innerHTML = output; + const crateSearch = document.getElementById("crate-search"); + if (crateSearch) { + crateSearch.addEventListener("input", updateCrate); + } + search.appendChild(resultsElem); + // Reset focused elements. + searchState.showResults(search); + const elems = document.getElementById("titles").childNodes; + searchState.focusedByTab = []; + let i = 0; + for (const elem of elems) { + const j = i; + elem.onclick = () => printTab(j); + searchState.focusedByTab.push(null); + i += 1; + } + printTab(currentTab); + } + + /** + * Perform a search based on the current state of the search input element + * and display the results. + * @param {Event} [e] - The event that triggered this search, if any + * @param {boolean} [forced] + */ + function search(e, forced) { + const params = searchState.getQueryStringParams(); + const query = parseQuery(searchState.input.value.trim()); + + if (e) { + e.preventDefault(); + } + + if (!forced && query.userQuery === currentResults) { + if (query.userQuery.length > 0) { + putBackSearch(); + } + return; + } + + let filterCrates = getFilterCrates(); + + // In case we have no information about the saved crate and there is a URL query parameter, + // we override it with the URL query parameter. + if (filterCrates === null && params["filter-crate"] !== undefined) { + filterCrates = params["filter-crate"]; + } + + // Update document title to maintain a meaningful browser history + searchState.title = "Results for " + query.original + " - Rust"; + + // Because searching is incremental by character, only the most + // recent search query is added to the browser history. + if (browserSupportsHistoryApi()) { + const newURL = buildUrl(query.original, filterCrates); + + if (!history.state && !params.search) { + history.pushState(null, "", newURL); + } else { + history.replaceState(null, "", newURL); + } + } + + showResults( + execQuery(query, searchWords, filterCrates, window.currentCrate), + params.go_to_first, + filterCrates); + } + + /** + * Convert a list of RawFunctionType / ID to object-based FunctionType. + * + * Crates often have lots of functions in them, and it's common to have a large number of + * functions that operate on a small set of data types, so the search index compresses them + * by encoding function parameter and return types as indexes into an array of names. + * + * Even when a general-purpose compression algorithm is used, this is still a win. I checked. + * https://github.com/rust-lang/rust/pull/98475#issue-1284395985 + * + * The format for individual function types is encoded in + * librustdoc/html/render/mod.rs: impl Serialize for RenderType + * + * @param {null|Array<RawFunctionType>} types + * @param {Array<{name: string, ty: number}>} lowercasePaths + * + * @return {Array<FunctionSearchType>} + */ + function buildItemSearchTypeAll(types, lowercasePaths) { + const PATH_INDEX_DATA = 0; + const GENERICS_DATA = 1; + return types.map(type => { + let pathIndex, generics; + if (typeof type === "number") { + pathIndex = type; + generics = []; + } else { + pathIndex = type[PATH_INDEX_DATA]; + generics = buildItemSearchTypeAll(type[GENERICS_DATA], lowercasePaths); + } + return { + // `0` is used as a sentinel because it's fewer bytes than `null` + name: pathIndex === 0 ? null : lowercasePaths[pathIndex - 1].name, + ty: pathIndex === 0 ? null : lowercasePaths[pathIndex - 1].ty, + generics: generics, + }; + }); + } + + /** + * Convert from RawFunctionSearchType to FunctionSearchType. + * + * Crates often have lots of functions in them, and function signatures are sometimes complex, + * so rustdoc uses a pretty tight encoding for them. This function converts it to a simpler, + * object-based encoding so that the actual search code is more readable and easier to debug. + * + * The raw function search type format is generated using serde in + * librustdoc/html/render/mod.rs: impl Serialize for IndexItemFunctionType + * + * @param {RawFunctionSearchType} functionSearchType + * @param {Array<{name: string, ty: number}>} lowercasePaths + * + * @return {null|FunctionSearchType} + */ + function buildFunctionSearchType(functionSearchType, lowercasePaths) { + const INPUTS_DATA = 0; + const OUTPUT_DATA = 1; + // `0` is used as a sentinel because it's fewer bytes than `null` + if (functionSearchType === 0) { + return null; + } + let inputs, output; + if (typeof functionSearchType[INPUTS_DATA] === "number") { + const pathIndex = functionSearchType[INPUTS_DATA]; + inputs = [{ + name: pathIndex === 0 ? null : lowercasePaths[pathIndex - 1].name, + ty: pathIndex === 0 ? null : lowercasePaths[pathIndex - 1].ty, + generics: [], + }]; + } else { + inputs = buildItemSearchTypeAll(functionSearchType[INPUTS_DATA], lowercasePaths); + } + if (functionSearchType.length > 1) { + if (typeof functionSearchType[OUTPUT_DATA] === "number") { + const pathIndex = functionSearchType[OUTPUT_DATA]; + output = [{ + name: pathIndex === 0 ? null : lowercasePaths[pathIndex - 1].name, + ty: pathIndex === 0 ? null : lowercasePaths[pathIndex - 1].ty, + generics: [], + }]; + } else { + output = buildItemSearchTypeAll(functionSearchType[OUTPUT_DATA], lowercasePaths); + } + } else { + output = []; + } + return { + inputs, output, + }; + } + + function buildIndex(rawSearchIndex) { + searchIndex = []; + /** + * @type {Array<string>} + */ + const searchWords = []; + let i, word; + let currentIndex = 0; + let id = 0; + + for (const crate in rawSearchIndex) { + if (!hasOwnPropertyRustdoc(rawSearchIndex, crate)) { + continue; + } + + let crateSize = 0; + + /** + * The raw search data for a given crate. `n`, `t`, `d`, and `q`, `i`, and `f` + * are arrays with the same length. n[i] contains the name of an item. + * t[i] contains the type of that item (as a small integer that represents an + * offset in `itemTypes`). d[i] contains the description of that item. + * + * q[i] contains the full path of the item, or an empty string indicating + * "same as q[i-1]". + * + * i[i] contains an item's parent, usually a module. For compactness, + * it is a set of indexes into the `p` array. + * + * f[i] contains function signatures, or `0` if the item isn't a function. + * Functions are themselves encoded as arrays. The first item is a list of + * types representing the function's inputs, and the second list item is a list + * of types representing the function's output. Tuples are flattened. + * Types are also represented as arrays; the first item is an index into the `p` + * array, while the second is a list of types representing any generic parameters. + * + * `a` defines aliases with an Array of pairs: [name, offset], where `offset` + * points into the n/t/d/q/i/f arrays. + * + * `doc` contains the description of the crate. + * + * `p` is a list of path/type pairs. It is used for parents and function parameters. + * + * @type {{ + * doc: string, + * a: Object, + * n: Array<string>, + * t: Array<Number>, + * d: Array<string>, + * q: Array<string>, + * i: Array<Number>, + * f: Array<RawFunctionSearchType>, + * p: Array<Object>, + * }} + */ + const crateCorpus = rawSearchIndex[crate]; + + searchWords.push(crate); + // This object should have exactly the same set of fields as the "row" + // object defined below. Your JavaScript runtime will thank you. + // https://mathiasbynens.be/notes/shapes-ics + const crateRow = { + crate: crate, + ty: 1, // == ExternCrate + name: crate, + path: "", + desc: crateCorpus.doc, + parent: undefined, + type: null, + id: id, + normalizedName: crate.indexOf("_") === -1 ? crate : crate.replace(/_/g, ""), + }; + id += 1; + searchIndex.push(crateRow); + currentIndex += 1; + + // an array of (Number) item types + const itemTypes = crateCorpus.t; + // an array of (String) item names + const itemNames = crateCorpus.n; + // an array of (String) full paths (or empty string for previous path) + const itemPaths = crateCorpus.q; + // an array of (String) descriptions + const itemDescs = crateCorpus.d; + // an array of (Number) the parent path index + 1 to `paths`, or 0 if none + const itemParentIdxs = crateCorpus.i; + // an array of (Object | null) the type of the function, if any + const itemFunctionSearchTypes = crateCorpus.f; + // an array of [(Number) item type, + // (String) name] + const paths = crateCorpus.p; + // an array of [(String) alias name + // [Number] index to items] + const aliases = crateCorpus.a; + + // an array of [{name: String, ty: Number}] + const lowercasePaths = []; + + // convert `rawPaths` entries into object form + // generate normalizedPaths for function search mode + let len = paths.length; + for (i = 0; i < len; ++i) { + lowercasePaths.push({ty: paths[i][0], name: paths[i][1].toLowerCase()}); + paths[i] = {ty: paths[i][0], name: paths[i][1]}; + } + + // convert `item*` into an object form, and construct word indices. + // + // before any analysis is performed lets gather the search terms to + // search against apart from the rest of the data. This is a quick + // operation that is cached for the life of the page state so that + // all other search operations have access to this cached data for + // faster analysis operations + len = itemTypes.length; + let lastPath = ""; + for (i = 0; i < len; ++i) { + // This object should have exactly the same set of fields as the "crateRow" + // object defined above. + if (typeof itemNames[i] === "string") { + word = itemNames[i].toLowerCase(); + searchWords.push(word); + } else { + word = ""; + searchWords.push(""); + } + const row = { + crate: crate, + ty: itemTypes[i], + name: itemNames[i], + path: itemPaths[i] ? itemPaths[i] : lastPath, + desc: itemDescs[i], + parent: itemParentIdxs[i] > 0 ? paths[itemParentIdxs[i] - 1] : undefined, + type: buildFunctionSearchType(itemFunctionSearchTypes[i], lowercasePaths), + id: id, + normalizedName: word.indexOf("_") === -1 ? word : word.replace(/_/g, ""), + }; + id += 1; + searchIndex.push(row); + lastPath = row.path; + crateSize += 1; + } + + if (aliases) { + ALIASES[crate] = Object.create(null); + for (const alias_name in aliases) { + if (!hasOwnPropertyRustdoc(aliases, alias_name)) { + continue; + } + + if (!hasOwnPropertyRustdoc(ALIASES[crate], alias_name)) { + ALIASES[crate][alias_name] = []; + } + for (const local_alias of aliases[alias_name]) { + ALIASES[crate][alias_name].push(local_alias + currentIndex); + } + } + } + currentIndex += crateSize; + } + return searchWords; + } + + /** + * Callback for when the search form is submitted. + * @param {Event} [e] - The event that triggered this call, if any + */ + function onSearchSubmit(e) { + e.preventDefault(); + searchState.clearInputTimeout(); + search(); + } + + function putBackSearch() { + const search_input = searchState.input; + if (!searchState.input) { + return; + } + if (search_input.value !== "" && !searchState.isDisplayed()) { + searchState.showResults(); + if (browserSupportsHistoryApi()) { + history.replaceState(null, "", + buildUrl(search_input.value, getFilterCrates())); + } + document.title = searchState.title; + } + } + + function registerSearchEvents() { + const params = searchState.getQueryStringParams(); + + // Populate search bar with query string search term when provided, + // but only if the input bar is empty. This avoid the obnoxious issue + // where you start trying to do a search, and the index loads, and + // suddenly your search is gone! + if (searchState.input.value === "") { + searchState.input.value = params.search || ""; + } + + const searchAfter500ms = () => { + searchState.clearInputTimeout(); + if (searchState.input.value.length === 0) { + if (browserSupportsHistoryApi()) { + history.replaceState(null, window.currentCrate + " - Rust", + getNakedUrl() + window.location.hash); + } + searchState.hideResults(); + } else { + searchState.timeout = setTimeout(search, 500); + } + }; + searchState.input.onkeyup = searchAfter500ms; + searchState.input.oninput = searchAfter500ms; + document.getElementsByClassName("search-form")[0].onsubmit = onSearchSubmit; + searchState.input.onchange = e => { + if (e.target !== document.activeElement) { + // To prevent doing anything when it's from a blur event. + return; + } + // Do NOT e.preventDefault() here. It will prevent pasting. + searchState.clearInputTimeout(); + // zero-timeout necessary here because at the time of event handler execution the + // pasted content is not in the input field yet. Shouldn’t make any difference for + // change, though. + setTimeout(search, 0); + }; + searchState.input.onpaste = searchState.input.onchange; + + searchState.outputElement().addEventListener("keydown", e => { + // We only handle unmodified keystrokes here. We don't want to interfere with, + // for instance, alt-left and alt-right for history navigation. + if (e.altKey || e.ctrlKey || e.shiftKey || e.metaKey) { + return; + } + // up and down arrow select next/previous search result, or the + // search box if we're already at the top. + if (e.which === 38) { // up + const previous = document.activeElement.previousElementSibling; + if (previous) { + previous.focus(); + } else { + searchState.focus(); + } + e.preventDefault(); + } else if (e.which === 40) { // down + const next = document.activeElement.nextElementSibling; + if (next) { + next.focus(); + } + const rect = document.activeElement.getBoundingClientRect(); + if (window.innerHeight - rect.bottom < rect.height) { + window.scrollBy(0, rect.height); + } + e.preventDefault(); + } else if (e.which === 37) { // left + nextTab(-1); + e.preventDefault(); + } else if (e.which === 39) { // right + nextTab(1); + e.preventDefault(); + } + }); + + searchState.input.addEventListener("keydown", e => { + if (e.which === 40) { // down + focusSearchResult(); + e.preventDefault(); + } + }); + + searchState.input.addEventListener("focus", () => { + putBackSearch(); + }); + + searchState.input.addEventListener("blur", () => { + searchState.input.placeholder = searchState.input.origPlaceholder; + }); + + // Push and pop states are used to add search results to the browser + // history. + if (browserSupportsHistoryApi()) { + // Store the previous <title> so we can revert back to it later. + const previousTitle = document.title; + + window.addEventListener("popstate", e => { + const params = searchState.getQueryStringParams(); + // Revert to the previous title manually since the History + // API ignores the title parameter. + document.title = previousTitle; + // When browsing forward to search results the previous + // search will be repeated, so the currentResults are + // cleared to ensure the search is successful. + currentResults = null; + // Synchronize search bar with query string state and + // perform the search. This will empty the bar if there's + // nothing there, which lets you really go back to a + // previous state with nothing in the bar. + if (params.search && params.search.length > 0) { + searchState.input.value = params.search; + // Some browsers fire "onpopstate" for every page load + // (Chrome), while others fire the event only when actually + // popping a state (Firefox), which is why search() is + // called both here and at the end of the startSearch() + // function. + search(e); + } else { + searchState.input.value = ""; + // When browsing back from search results the main page + // visibility must be reset. + searchState.hideResults(); + } + }); + } + + // This is required in firefox to avoid this problem: Navigating to a search result + // with the keyboard, hitting enter, and then hitting back would take you back to + // the doc page, rather than the search that should overlay it. + // This was an interaction between the back-forward cache and our handlers + // that try to sync state between the URL and the search input. To work around it, + // do a small amount of re-init on page show. + window.onpageshow = () => { + const qSearch = searchState.getQueryStringParams().search; + if (searchState.input.value === "" && qSearch) { + searchState.input.value = qSearch; + } + search(); + }; + } + + function updateCrate(ev) { + if (ev.target.value === "All crates") { + // If we don't remove it from the URL, it'll be picked up again by the search. + const params = searchState.getQueryStringParams(); + const query = searchState.input.value.trim(); + if (!history.state && !params.search) { + history.pushState(null, "", buildUrl(query, null)); + } else { + history.replaceState(null, "", buildUrl(query, null)); + } + } + // In case you "cut" the entry from the search input, then change the crate filter + // before paste back the previous search, you get the old search results without + // the filter. To prevent this, we need to remove the previous results. + currentResults = null; + search(undefined, true); + } + + /** + * @type {Array<string>} + */ + const searchWords = buildIndex(rawSearchIndex); + if (typeof window !== "undefined") { + registerSearchEvents(); + // If there's a search term in the URL, execute the search now. + if (window.searchState.getQueryStringParams().search) { + search(); + } + } + + if (typeof exports !== "undefined") { + exports.initSearch = initSearch; + exports.execQuery = execQuery; + exports.parseQuery = parseQuery; + } + return searchWords; +} + +if (typeof window !== "undefined") { + window.initSearch = initSearch; + if (window.searchIndex !== undefined) { + initSearch(window.searchIndex); + } +} else { + // Running in Node, not a browser. Run initSearch just to produce the + // exports. + initSearch({}); +} + + +})(); diff --git a/src/librustdoc/html/static/js/settings.js b/src/librustdoc/html/static/js/settings.js new file mode 100644 index 000000000..797b931af --- /dev/null +++ b/src/librustdoc/html/static/js/settings.js @@ -0,0 +1,272 @@ +// Local js definitions: +/* global getSettingValue, getVirtualKey, updateLocalStorage, updateSystemTheme */ +/* global addClass, removeClass, onEach, onEachLazy, blurHandler, elemIsInParent */ +/* global MAIN_ID, getVar, getSettingsButton */ + +"use strict"; + +(function() { + const isSettingsPage = window.location.pathname.endsWith("/settings.html"); + + function changeSetting(settingName, value) { + updateLocalStorage(settingName, value); + + switch (settingName) { + case "theme": + case "preferred-dark-theme": + case "preferred-light-theme": + case "use-system-theme": + updateSystemTheme(); + updateLightAndDark(); + break; + } + } + + function handleKey(ev) { + // Don't interfere with browser shortcuts + if (ev.ctrlKey || ev.altKey || ev.metaKey) { + return; + } + switch (getVirtualKey(ev)) { + case "Enter": + case "Return": + case "Space": + ev.target.checked = !ev.target.checked; + ev.preventDefault(); + break; + } + } + + function showLightAndDark() { + addClass(document.getElementById("theme").parentElement, "hidden"); + removeClass(document.getElementById("preferred-light-theme").parentElement, "hidden"); + removeClass(document.getElementById("preferred-dark-theme").parentElement, "hidden"); + } + + function hideLightAndDark() { + addClass(document.getElementById("preferred-light-theme").parentElement, "hidden"); + addClass(document.getElementById("preferred-dark-theme").parentElement, "hidden"); + removeClass(document.getElementById("theme").parentElement, "hidden"); + } + + function updateLightAndDark() { + if (getSettingValue("use-system-theme") !== "false") { + showLightAndDark(); + } else { + hideLightAndDark(); + } + } + + function setEvents(settingsElement) { + updateLightAndDark(); + onEachLazy(settingsElement.getElementsByClassName("slider"), elem => { + const toggle = elem.previousElementSibling; + const settingId = toggle.id; + const settingValue = getSettingValue(settingId); + if (settingValue !== null) { + toggle.checked = settingValue === "true"; + } + toggle.onchange = function() { + changeSetting(this.id, this.checked); + }; + toggle.onkeyup = handleKey; + toggle.onkeyrelease = handleKey; + }); + onEachLazy(settingsElement.getElementsByClassName("select-wrapper"), elem => { + const select = elem.getElementsByTagName("select")[0]; + const settingId = select.id; + const settingValue = getSettingValue(settingId); + if (settingValue !== null) { + select.value = settingValue; + } + select.onchange = function() { + changeSetting(this.id, this.value); + }; + }); + onEachLazy(settingsElement.querySelectorAll("input[type=\"radio\"]"), elem => { + const settingId = elem.name; + const settingValue = getSettingValue(settingId); + if (settingValue !== null && settingValue !== "null") { + elem.checked = settingValue === elem.value; + } + elem.addEventListener("change", ev => { + changeSetting(ev.target.name, ev.target.value); + }); + }); + } + + /** + * This function builds the sections inside the "settings page". It takes a `settings` list + * as argument which describes each setting and how to render it. It returns a string + * representing the raw HTML. + * + * @param {Array<Object>} settings + * + * @return {string} + */ + function buildSettingsPageSections(settings) { + let output = ""; + + for (const setting of settings) { + output += "<div class=\"setting-line\">"; + const js_data_name = setting["js_name"]; + const setting_name = setting["name"]; + + if (setting["options"] !== undefined) { + // This is a select setting. + output += `<div class="radio-line" id="${js_data_name}">\ + <span class="setting-name">${setting_name}</span>\ + <div class="choices">`; + onEach(setting["options"], option => { + const checked = option === setting["default"] ? " checked" : ""; + + output += `<label for="${js_data_name}-${option}" class="choice">\ + <input type="radio" name="${js_data_name}" \ + id="${js_data_name}-${option}" value="${option}"${checked}>\ + <span>${option}</span>\ + </label>`; + }); + output += "</div></div>"; + } else { + // This is a toggle. + const checked = setting["default"] === true ? " checked" : ""; + output += `<label class="toggle">\ + <input type="checkbox" id="${js_data_name}"${checked}>\ + <span class="slider"></span>\ + <span class="label">${setting_name}</span>\ + </label>`; + } + output += "</div>"; + } + return output; + } + + /** + * This function builds the "settings page" and returns the generated HTML element. + * + * @return {HTMLElement} + */ + function buildSettingsPage() { + const themes = getVar("themes").split(","); + const settings = [ + { + "name": "Use system theme", + "js_name": "use-system-theme", + "default": true, + }, + { + "name": "Theme", + "js_name": "theme", + "default": "light", + "options": themes, + }, + { + "name": "Preferred light theme", + "js_name": "preferred-light-theme", + "default": "light", + "options": themes, + }, + { + "name": "Preferred dark theme", + "js_name": "preferred-dark-theme", + "default": "dark", + "options": themes, + }, + { + "name": "Auto-hide item contents for large items", + "js_name": "auto-hide-large-items", + "default": true, + }, + { + "name": "Auto-hide item methods' documentation", + "js_name": "auto-hide-method-docs", + "default": false, + }, + { + "name": "Auto-hide trait implementation documentation", + "js_name": "auto-hide-trait-implementations", + "default": false, + }, + { + "name": "Directly go to item in search if there is only one result", + "js_name": "go-to-only-result", + "default": false, + }, + { + "name": "Show line numbers on code examples", + "js_name": "line-numbers", + "default": false, + }, + { + "name": "Disable keyboard shortcuts", + "js_name": "disable-shortcuts", + "default": false, + }, + ]; + + // Then we build the DOM. + const elementKind = isSettingsPage ? "section" : "div"; + const innerHTML = `<div class="settings">${buildSettingsPageSections(settings)}</div>`; + const el = document.createElement(elementKind); + el.id = "settings"; + el.className = "popover"; + el.innerHTML = innerHTML; + + if (isSettingsPage) { + document.getElementById(MAIN_ID).appendChild(el); + } else { + el.setAttribute("tabindex", "-1"); + getSettingsButton().appendChild(el); + } + return el; + } + + const settingsMenu = buildSettingsPage(); + + function displaySettings() { + settingsMenu.style.display = ""; + } + + function settingsBlurHandler(event) { + blurHandler(event, getSettingsButton(), window.hidePopoverMenus); + } + + if (isSettingsPage) { + // We replace the existing "onclick" callback to do nothing if clicked. + getSettingsButton().onclick = function(event) { + event.preventDefault(); + }; + } else { + // We replace the existing "onclick" callback. + const settingsButton = getSettingsButton(); + const settingsMenu = document.getElementById("settings"); + settingsButton.onclick = function(event) { + if (elemIsInParent(event.target, settingsMenu)) { + return; + } + event.preventDefault(); + const shouldDisplaySettings = settingsMenu.style.display === "none"; + + window.hidePopoverMenus(); + if (shouldDisplaySettings) { + displaySettings(); + } + }; + settingsButton.onblur = settingsBlurHandler; + settingsButton.querySelector("a").onblur = settingsBlurHandler; + onEachLazy(settingsMenu.querySelectorAll("input"), el => { + el.onblur = settingsBlurHandler; + }); + settingsMenu.onblur = settingsBlurHandler; + } + + // We now wait a bit for the web browser to end re-computing the DOM... + setTimeout(() => { + setEvents(settingsMenu); + // The setting menu is already displayed if we're on the settings page. + if (!isSettingsPage) { + displaySettings(); + } + removeClass(getSettingsButton(), "rotate"); + }, 0); +})(); diff --git a/src/librustdoc/html/static/js/source-script.js b/src/librustdoc/html/static/js/source-script.js new file mode 100644 index 000000000..c45d61429 --- /dev/null +++ b/src/librustdoc/html/static/js/source-script.js @@ -0,0 +1,241 @@ +// From rust: +/* global sourcesIndex */ + +// Local js definitions: +/* global addClass, getCurrentValue, onEachLazy, removeClass, browserSupportsHistoryApi */ +/* global updateLocalStorage */ + +"use strict"; + +(function() { + +const rootPath = document.getElementById("rustdoc-vars").attributes["data-root-path"].value; +let oldScrollPosition = 0; + +const NAME_OFFSET = 0; +const DIRS_OFFSET = 1; +const FILES_OFFSET = 2; + +function closeSidebarIfMobile() { + if (window.innerWidth < window.RUSTDOC_MOBILE_BREAKPOINT) { + updateLocalStorage("source-sidebar-show", "false"); + } +} + +function createDirEntry(elem, parent, fullPath, hasFoundFile) { + const dirEntry = document.createElement("details"); + const summary = document.createElement("summary"); + + dirEntry.className = "dir-entry"; + + fullPath += elem[NAME_OFFSET] + "/"; + + summary.innerText = elem[NAME_OFFSET]; + dirEntry.appendChild(summary); + + const folders = document.createElement("div"); + folders.className = "folders"; + if (elem[DIRS_OFFSET]) { + for (const dir of elem[DIRS_OFFSET]) { + if (createDirEntry(dir, folders, fullPath, false)) { + dirEntry.open = true; + hasFoundFile = true; + } + } + } + dirEntry.appendChild(folders); + + const files = document.createElement("div"); + files.className = "files"; + if (elem[FILES_OFFSET]) { + for (const file_text of elem[FILES_OFFSET]) { + const file = document.createElement("a"); + file.innerText = file_text; + file.href = rootPath + "src/" + fullPath + file_text + ".html"; + file.addEventListener("click", closeSidebarIfMobile); + const w = window.location.href.split("#")[0]; + if (!hasFoundFile && w === file.href) { + file.className = "selected"; + dirEntry.open = true; + hasFoundFile = true; + } + files.appendChild(file); + } + } + dirEntry.appendChild(files); + parent.appendChild(dirEntry); + return hasFoundFile; +} + +function toggleSidebar() { + const child = this.parentNode.children[0]; + if (child.innerText === ">") { + if (window.innerWidth < window.RUSTDOC_MOBILE_BREAKPOINT) { + // This is to keep the scroll position on mobile. + oldScrollPosition = window.scrollY; + document.body.style.position = "fixed"; + document.body.style.top = `-${oldScrollPosition}px`; + } + addClass(document.documentElement, "source-sidebar-expanded"); + child.innerText = "<"; + updateLocalStorage("source-sidebar-show", "true"); + } else { + if (window.innerWidth < window.RUSTDOC_MOBILE_BREAKPOINT) { + // This is to keep the scroll position on mobile. + document.body.style.position = ""; + document.body.style.top = ""; + // The scroll position is lost when resetting the style, hence why we store it in + // `oldScroll`. + window.scrollTo(0, oldScrollPosition); + } + removeClass(document.documentElement, "source-sidebar-expanded"); + child.innerText = ">"; + updateLocalStorage("source-sidebar-show", "false"); + } +} + +function createSidebarToggle() { + const sidebarToggle = document.createElement("div"); + sidebarToggle.id = "sidebar-toggle"; + + const inner = document.createElement("button"); + + if (getCurrentValue("source-sidebar-show") === "true") { + inner.innerText = "<"; + } else { + inner.innerText = ">"; + } + inner.onclick = toggleSidebar; + + sidebarToggle.appendChild(inner); + return sidebarToggle; +} + +// This function is called from "source-files.js", generated in `html/render/mod.rs`. +// eslint-disable-next-line no-unused-vars +function createSourceSidebar() { + const container = document.querySelector("nav.sidebar"); + + const sidebarToggle = createSidebarToggle(); + container.insertBefore(sidebarToggle, container.firstChild); + + const sidebar = document.createElement("div"); + sidebar.id = "source-sidebar"; + + let hasFoundFile = false; + + const title = document.createElement("div"); + title.className = "title"; + title.innerText = "Files"; + sidebar.appendChild(title); + Object.keys(sourcesIndex).forEach(key => { + sourcesIndex[key][NAME_OFFSET] = key; + hasFoundFile = createDirEntry(sourcesIndex[key], sidebar, "", + hasFoundFile); + }); + + container.appendChild(sidebar); + // Focus on the current file in the source files sidebar. + const selected_elem = sidebar.getElementsByClassName("selected")[0]; + if (typeof selected_elem !== "undefined") { + selected_elem.focus(); + } +} + +const lineNumbersRegex = /^#?(\d+)(?:-(\d+))?$/; + +function highlightSourceLines(match) { + if (typeof match === "undefined") { + match = window.location.hash.match(lineNumbersRegex); + } + if (!match) { + return; + } + let from = parseInt(match[1], 10); + let to = from; + if (typeof match[2] !== "undefined") { + to = parseInt(match[2], 10); + } + if (to < from) { + const tmp = to; + to = from; + from = tmp; + } + let elem = document.getElementById(from); + if (!elem) { + return; + } + const x = document.getElementById(from); + if (x) { + x.scrollIntoView(); + } + onEachLazy(document.getElementsByClassName("line-numbers"), e => { + onEachLazy(e.getElementsByTagName("span"), i_e => { + removeClass(i_e, "line-highlighted"); + }); + }); + for (let i = from; i <= to; ++i) { + elem = document.getElementById(i); + if (!elem) { + break; + } + addClass(elem, "line-highlighted"); + } +} + +const handleSourceHighlight = (function() { + let prev_line_id = 0; + + const set_fragment = name => { + const x = window.scrollX, + y = window.scrollY; + if (browserSupportsHistoryApi()) { + history.replaceState(null, null, "#" + name); + highlightSourceLines(); + } else { + location.replace("#" + name); + } + // Prevent jumps when selecting one or many lines + window.scrollTo(x, y); + }; + + return ev => { + let cur_line_id = parseInt(ev.target.id, 10); + // It can happen when clicking not on a line number span. + if (isNaN(cur_line_id)) { + return; + } + ev.preventDefault(); + + if (ev.shiftKey && prev_line_id) { + // Swap selection if needed + if (prev_line_id > cur_line_id) { + const tmp = prev_line_id; + prev_line_id = cur_line_id; + cur_line_id = tmp; + } + + set_fragment(prev_line_id + "-" + cur_line_id); + } else { + prev_line_id = cur_line_id; + + set_fragment(cur_line_id); + } + }; +}()); + +window.addEventListener("hashchange", () => { + const match = window.location.hash.match(lineNumbersRegex); + if (match) { + return highlightSourceLines(match); + } +}); + +onEachLazy(document.getElementsByClassName("line-numbers"), el => { + el.addEventListener("click", handleSourceHighlight); +}); + +highlightSourceLines(); + +window.createSourceSidebar = createSourceSidebar; +})(); diff --git a/src/librustdoc/html/static/js/storage.js b/src/librustdoc/html/static/js/storage.js new file mode 100644 index 000000000..0c5389d45 --- /dev/null +++ b/src/librustdoc/html/static/js/storage.js @@ -0,0 +1,268 @@ +// storage.js is loaded in the `<head>` of all rustdoc pages and doesn't +// use `async` or `defer`. That means it blocks further parsing and rendering +// of the page: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script. +// This makes it the correct place to act on settings that affect the display of +// the page, so we don't see major layout changes during the load of the page. +"use strict"; + +const darkThemes = ["dark", "ayu"]; +window.currentTheme = document.getElementById("themeStyle"); +window.mainTheme = document.getElementById("mainThemeStyle"); + +// WARNING: RUSTDOC_MOBILE_BREAKPOINT MEDIA QUERY +// If you update this line, then you also need to update the two media queries with the same +// warning in rustdoc.css +window.RUSTDOC_MOBILE_BREAKPOINT = 701; + +const settingsDataset = (function() { + const settingsElement = document.getElementById("default-settings"); + if (settingsElement === null) { + return null; + } + const dataset = settingsElement.dataset; + if (dataset === undefined) { + return null; + } + return dataset; +})(); + +function getSettingValue(settingName) { + const current = getCurrentValue(settingName); + if (current !== null) { + return current; + } + if (settingsDataset !== null) { + // See the comment for `default_settings.into_iter()` etc. in + // `Options::from_matches` in `librustdoc/config.rs`. + const def = settingsDataset[settingName.replace(/-/g,"_")]; + if (def !== undefined) { + return def; + } + } + return null; +} + +const localStoredTheme = getSettingValue("theme"); + +const savedHref = []; + +// eslint-disable-next-line no-unused-vars +function hasClass(elem, className) { + return elem && elem.classList && elem.classList.contains(className); +} + +// eslint-disable-next-line no-unused-vars +function addClass(elem, className) { + if (!elem || !elem.classList) { + return; + } + elem.classList.add(className); +} + +// eslint-disable-next-line no-unused-vars +function removeClass(elem, className) { + if (!elem || !elem.classList) { + return; + } + elem.classList.remove(className); +} + +/** + * Run a callback for every element of an Array. + * @param {Array<?>} arr - The array to iterate over + * @param {function(?)} func - The callback + * @param {boolean} [reversed] - Whether to iterate in reverse + */ +function onEach(arr, func, reversed) { + if (arr && arr.length > 0 && func) { + if (reversed) { + const length = arr.length; + for (let i = length - 1; i >= 0; --i) { + if (func(arr[i])) { + return true; + } + } + } else { + for (const elem of arr) { + if (func(elem)) { + return true; + } + } + } + } + return false; +} + +/** + * Turn an HTMLCollection or a NodeList into an Array, then run a callback + * for every element. This is useful because iterating over an HTMLCollection + * or a "live" NodeList while modifying it can be very slow. + * https://developer.mozilla.org/en-US/docs/Web/API/HTMLCollection + * https://developer.mozilla.org/en-US/docs/Web/API/NodeList + * @param {NodeList<?>|HTMLCollection<?>} lazyArray - An array to iterate over + * @param {function(?)} func - The callback + * @param {boolean} [reversed] - Whether to iterate in reverse + */ +function onEachLazy(lazyArray, func, reversed) { + return onEach( + Array.prototype.slice.call(lazyArray), + func, + reversed); +} + +function updateLocalStorage(name, value) { + try { + window.localStorage.setItem("rustdoc-" + name, value); + } catch (e) { + // localStorage is not accessible, do nothing + } +} + +function getCurrentValue(name) { + try { + return window.localStorage.getItem("rustdoc-" + name); + } catch (e) { + return null; + } +} + +function switchTheme(styleElem, mainStyleElem, newTheme, saveTheme) { + const newHref = mainStyleElem.href.replace( + /\/rustdoc([^/]*)\.css/, "/" + newTheme + "$1" + ".css"); + + // If this new value comes from a system setting or from the previously + // saved theme, no need to save it. + if (saveTheme) { + updateLocalStorage("theme", newTheme); + } + + if (styleElem.href === newHref) { + return; + } + + let found = false; + if (savedHref.length === 0) { + onEachLazy(document.getElementsByTagName("link"), el => { + savedHref.push(el.href); + }); + } + onEach(savedHref, el => { + if (el === newHref) { + found = true; + return true; + } + }); + if (found) { + styleElem.href = newHref; + } +} + +// This function is called from "main.js". +// eslint-disable-next-line no-unused-vars +function useSystemTheme(value) { + if (value === undefined) { + value = true; + } + + updateLocalStorage("use-system-theme", value); + + // update the toggle if we're on the settings page + const toggle = document.getElementById("use-system-theme"); + if (toggle && toggle instanceof HTMLInputElement) { + toggle.checked = value; + } +} + +const updateSystemTheme = (function() { + if (!window.matchMedia) { + // fallback to the CSS computed value + return () => { + const cssTheme = getComputedStyle(document.documentElement) + .getPropertyValue("content"); + + switchTheme( + window.currentTheme, + window.mainTheme, + JSON.parse(cssTheme) || "light", + true + ); + }; + } + + // only listen to (prefers-color-scheme: dark) because light is the default + const mql = window.matchMedia("(prefers-color-scheme: dark)"); + + function handlePreferenceChange(mql) { + const use = theme => { + switchTheme(window.currentTheme, window.mainTheme, theme, true); + }; + // maybe the user has disabled the setting in the meantime! + if (getSettingValue("use-system-theme") !== "false") { + const lightTheme = getSettingValue("preferred-light-theme") || "light"; + const darkTheme = getSettingValue("preferred-dark-theme") || "dark"; + + if (mql.matches) { + use(darkTheme); + } else { + // prefers a light theme, or has no preference + use(lightTheme); + } + // note: we save the theme so that it doesn't suddenly change when + // the user disables "use-system-theme" and reloads the page or + // navigates to another page + } else { + use(getSettingValue("theme")); + } + } + + mql.addListener(handlePreferenceChange); + + return () => { + handlePreferenceChange(mql); + }; +})(); + +function switchToSavedTheme() { + switchTheme( + window.currentTheme, + window.mainTheme, + getSettingValue("theme") || "light", + false + ); +} + +if (getSettingValue("use-system-theme") !== "false" && window.matchMedia) { + // update the preferred dark theme if the user is already using a dark theme + // See https://github.com/rust-lang/rust/pull/77809#issuecomment-707875732 + if (getSettingValue("use-system-theme") === null + && getSettingValue("preferred-dark-theme") === null + && darkThemes.indexOf(localStoredTheme) >= 0) { + updateLocalStorage("preferred-dark-theme", localStoredTheme); + } + + // call the function to initialize the theme at least once! + updateSystemTheme(); +} else { + switchToSavedTheme(); +} + +if (getSettingValue("source-sidebar-show") === "true") { + // At this point in page load, `document.body` is not available yet. + // Set a class on the `<html>` element instead. + addClass(document.documentElement, "source-sidebar-expanded"); +} + +// If we navigate away (for example to a settings page), and then use the back or +// forward button to get back to a page, the theme may have changed in the meantime. +// But scripts may not be re-loaded in such a case due to the bfcache +// (https://web.dev/bfcache/). The "pageshow" event triggers on such navigations. +// Use that opportunity to update the theme. +// We use a setTimeout with a 0 timeout here to put the change on the event queue. +// For some reason, if we try to change the theme while the `pageshow` event is +// running, it sometimes fails to take effect. The problem manifests on Chrome, +// specifically when talking to a remote website with no caching. +window.addEventListener("pageshow", ev => { + if (ev.persisted) { + setTimeout(switchToSavedTheme, 0); + } +}); diff --git a/src/librustdoc/html/static/scrape-examples-help.md b/src/librustdoc/html/static/scrape-examples-help.md new file mode 100644 index 000000000..035b2e18b --- /dev/null +++ b/src/librustdoc/html/static/scrape-examples-help.md @@ -0,0 +1,34 @@ +Rustdoc will automatically scrape examples of documented items from the `examples/` directory of a project. These examples will be included within the generated documentation for that item. For example, if your library contains a public function: + +```rust +// src/lib.rs +pub fn a_func() {} +``` + +And you have an example calling this function: + +```rust +// examples/ex.rs +fn main() { + a_crate::a_func(); +} +``` + +Then this code snippet will be included in the documentation for `a_func`. + +## How to read scraped examples + +Scraped examples are shown as blocks of code from a given file. The relevant item will be highlighted. If the file is larger than a couple lines, only a small window will be shown which you can expand by clicking ↕ in the top-right. If a file contains multiple instances of an item, you can use the ≺ and ≻ buttons to toggle through each instance. + +If there is more than one file that contains examples, then you should click "More examples" to see these examples. + + +## How Rustdoc scrapes examples + +When you run `cargo doc`, Rustdoc will analyze all the crates that match Cargo's `--examples` filter for instances of items that occur in the crates being documented. Then Rustdoc will include the source code of these instances in the generated documentation. + +Rustdoc has a few techniques to ensure this doesn't overwhelm documentation readers, and that it doesn't blow up the page size: + +1. For a given item, a maximum of 5 examples are included in the page. The remaining examples are just links to source code. +2. Only one example is shown by default, and the remaining examples are hidden behind a toggle. +3. For a given file that contains examples, only the item containing the examples will be included in the generated documentation. diff --git a/src/librustdoc/html/static_files.rs b/src/librustdoc/html/static_files.rs new file mode 100644 index 000000000..75f2b7e35 --- /dev/null +++ b/src/librustdoc/html/static_files.rs @@ -0,0 +1,168 @@ +//! Static files bundled with documentation output. +//! +//! All the static files are included here for centralized access in case anything other than the +//! HTML rendering code (say, the theme checker) needs to access one of these files. +//! +//! Note about types: CSS and JavaScript files are included as `&'static str` to allow for the +//! minifier to run on them. All other files are included as `&'static [u8]` so they can be +//! directly written to a `Write` handle. + +/// The file contents of the main `rustdoc.css` file, responsible for the core layout of the page. +pub(crate) static RUSTDOC_CSS: &str = include_str!("static/css/rustdoc.css"); + +/// The file contents of `settings.css`, responsible for the items on the settings page. +pub(crate) static SETTINGS_CSS: &str = include_str!("static/css/settings.css"); + +/// The file contents of the `noscript.css` file, used in case JS isn't supported or is disabled. +pub(crate) static NOSCRIPT_CSS: &str = include_str!("static/css/noscript.css"); + +/// The file contents of `normalize.css`, included to even out standard elements between browser +/// implementations. +pub(crate) static NORMALIZE_CSS: &str = include_str!("static/css/normalize.css"); + +/// The file contents of `main.js`, which contains the core JavaScript used on documentation pages, +/// including search behavior and docblock folding, among others. +pub(crate) static MAIN_JS: &str = include_str!("static/js/main.js"); + +/// The file contents of `search.js`, which contains the search behavior. +pub(crate) static SEARCH_JS: &str = include_str!("static/js/search.js"); + +/// The file contents of `settings.js`, which contains the JavaScript used to handle the settings +/// page. +pub(crate) static SETTINGS_JS: &str = include_str!("static/js/settings.js"); + +/// The file contents of `storage.js`, which contains functionality related to browser Local +/// Storage, used to store documentation settings. +pub(crate) static STORAGE_JS: &str = include_str!("static/js/storage.js"); + +/// The file contents of `scraped-examples.js`, which contains functionality related to the +/// --scrape-examples flag that inserts automatically-found examples of usages of items. +pub(crate) static SCRAPE_EXAMPLES_JS: &str = include_str!("static/js/scrape-examples.js"); + +pub(crate) static SCRAPE_EXAMPLES_HELP_MD: &str = include_str!("static/scrape-examples-help.md"); + +/// The file contents of `wheel.svg`, the icon used for the settings button. +pub(crate) static WHEEL_SVG: &[u8] = include_bytes!("static/images/wheel.svg"); + +/// The file contents of `clipboard.svg`, the icon used for the "copy path" button. +pub(crate) static CLIPBOARD_SVG: &[u8] = include_bytes!("static/images/clipboard.svg"); + +/// The file contents of `down-arrow.svg`, the icon used for the crate choice combobox. +pub(crate) static DOWN_ARROW_SVG: &[u8] = include_bytes!("static/images/down-arrow.svg"); + +/// The file contents of `toggle-minus.svg`, the icon used for opened toggles. +pub(crate) static TOGGLE_MINUS_PNG: &[u8] = include_bytes!("static/images/toggle-minus.svg"); + +/// The file contents of `toggle-plus.svg`, the icon used for closed toggles. +pub(crate) static TOGGLE_PLUS_PNG: &[u8] = include_bytes!("static/images/toggle-plus.svg"); + +/// The contents of `COPYRIGHT.txt`, the license listing for files distributed with documentation +/// output. +pub(crate) static COPYRIGHT: &[u8] = include_bytes!("static/COPYRIGHT.txt"); + +/// The contents of `LICENSE-APACHE.txt`, the text of the Apache License, version 2.0. +pub(crate) static LICENSE_APACHE: &[u8] = include_bytes!("static/LICENSE-APACHE.txt"); + +/// The contents of `LICENSE-MIT.txt`, the text of the MIT License. +pub(crate) static LICENSE_MIT: &[u8] = include_bytes!("static/LICENSE-MIT.txt"); + +/// The contents of `rust-logo.svg`, the default icon of the documentation. +pub(crate) static RUST_LOGO_SVG: &[u8] = include_bytes!("static/images/rust-logo.svg"); + +/// The default documentation favicons (SVG and PNG fallbacks) +pub(crate) static RUST_FAVICON_SVG: &[u8] = include_bytes!("static/images/favicon.svg"); +pub(crate) static RUST_FAVICON_PNG_16: &[u8] = include_bytes!("static/images/favicon-16x16.png"); +pub(crate) static RUST_FAVICON_PNG_32: &[u8] = include_bytes!("static/images/favicon-32x32.png"); + +/// The built-in themes given to every documentation site. +pub(crate) mod themes { + /// The "light" theme, selected by default when no setting is available. Used as the basis for + /// the `--check-theme` functionality. + pub(crate) static LIGHT: &str = include_str!("static/css/themes/light.css"); + + /// The "dark" theme. + pub(crate) static DARK: &str = include_str!("static/css/themes/dark.css"); + + /// The "ayu" theme. + pub(crate) static AYU: &str = include_str!("static/css/themes/ayu.css"); +} + +/// Files related to the Fira Sans font. +pub(crate) mod fira_sans { + /// The file `FiraSans-Regular.woff2`, the Regular variant of the Fira Sans font in woff2. + pub(crate) static REGULAR: &[u8] = include_bytes!("static/fonts/FiraSans-Regular.woff2"); + + /// The file `FiraSans-Medium.woff2`, the Medium variant of the Fira Sans font in woff2. + pub(crate) static MEDIUM: &[u8] = include_bytes!("static/fonts/FiraSans-Medium.woff2"); + + /// The file `FiraSans-LICENSE.txt`, the license text for the Fira Sans font. + pub(crate) static LICENSE: &[u8] = include_bytes!("static/fonts/FiraSans-LICENSE.txt"); +} + +/// Files related to the Source Serif 4 font. +pub(crate) mod source_serif_4 { + /// The file `SourceSerif4-Regular.ttf.woff2`, the Regular variant of the Source Serif 4 font in + /// woff2. + pub(crate) static REGULAR: &[u8] = + include_bytes!("static/fonts/SourceSerif4-Regular.ttf.woff2"); + + /// The file `SourceSerif4-Bold.ttf.woff2`, the Bold variant of the Source Serif 4 font in + /// woff2. + pub(crate) static BOLD: &[u8] = include_bytes!("static/fonts/SourceSerif4-Bold.ttf.woff2"); + + /// The file `SourceSerif4-It.ttf.woff2`, the Italic variant of the Source Serif 4 font in + /// woff2. + pub(crate) static ITALIC: &[u8] = include_bytes!("static/fonts/SourceSerif4-It.ttf.woff2"); + + /// The file `SourceSerif4-LICENSE.txt`, the license text for the Source Serif 4 font. + pub(crate) static LICENSE: &[u8] = include_bytes!("static/fonts/SourceSerif4-LICENSE.md"); +} + +/// Files related to the Source Code Pro font. +pub(crate) mod source_code_pro { + /// The file `SourceCodePro-Regular.ttf.woff2`, the Regular variant of the Source Code Pro font + /// in woff2. + pub(crate) static REGULAR: &[u8] = + include_bytes!("static/fonts/SourceCodePro-Regular.ttf.woff2"); + + /// The file `SourceCodePro-Semibold.ttf.woff2`, the Semibold variant of the Source Code Pro + /// font in woff2. + pub(crate) static SEMIBOLD: &[u8] = + include_bytes!("static/fonts/SourceCodePro-Semibold.ttf.woff2"); + + /// The file `SourceCodePro-It.ttf.woff2`, the Italic variant of the Source Code Pro font in + /// woff2. + pub(crate) static ITALIC: &[u8] = include_bytes!("static/fonts/SourceCodePro-It.ttf.woff2"); + + /// The file `SourceCodePro-LICENSE.txt`, the license text of the Source Code Pro font. + pub(crate) static LICENSE: &[u8] = include_bytes!("static/fonts/SourceCodePro-LICENSE.txt"); +} + +/// Files related to the Nanum Barun Gothic font. +/// +/// These files are used to avoid some legacy CJK serif fonts in Windows. +/// +/// Note that the Noto Sans KR font, which was used previously but was not very readable on Windows, +/// has been replaced by the Nanum Barun Gothic font. This is due to Windows' implementation of font +/// rendering that distorts OpenType fonts too much. +/// +/// The font files were generated with these commands: +/// +/// ```sh +/// pyftsubset NanumBarunGothic.ttf \ +/// --unicodes=U+AC00-D7AF,U+1100-11FF,U+3130-318F,U+A960-A97F,U+D7B0-D7FF \ +/// --output-file=NanumBarunGothic.ttf.woff2 --flavor=woff2 +/// ``` +pub(crate) mod nanum_barun_gothic { + /// The file `NanumBarunGothic.ttf.woff2`, the Regular variant of the Nanum Barun Gothic font. + pub(crate) static REGULAR: &[u8] = include_bytes!("static/fonts/NanumBarunGothic.ttf.woff2"); + + /// The file `NanumBarunGothic-LICENSE.txt`, the license text of the Nanum Barun Gothic font. + pub(crate) static LICENSE: &[u8] = include_bytes!("static/fonts/NanumBarunGothic-LICENSE.txt"); +} + +/// Files related to the sidebar in rustdoc sources. +pub(crate) mod sidebar { + /// File script to handle sidebar. + pub(crate) static SOURCE_SCRIPT: &str = include_str!("static/js/source-script.js"); +} diff --git a/src/librustdoc/html/templates/STYLE.md b/src/librustdoc/html/templates/STYLE.md new file mode 100644 index 000000000..fff65e3b5 --- /dev/null +++ b/src/librustdoc/html/templates/STYLE.md @@ -0,0 +1,37 @@ +# Style for Templates + +This directory has templates in the [Tera templating language](teradoc), which is very +similar to [Jinja2](jinjadoc) and [Django](djangodoc) templates, and also to [Askama](askamadoc). + +[teradoc]: https://tera.netlify.app/docs/#templates +[jinjadoc]: https://jinja.palletsprojects.com/en/3.0.x/templates/ +[djangodoc]: https://docs.djangoproject.com/en/3.2/topics/templates/ +[askamadoc]: https://docs.rs/askama/0.10.5/askama/ + +We want our rendered output to have as little unnecessary whitespace as +possible, so that pages load quickly. To achieve that we use Tera's +[whitespace control] features. At the end of most lines, we put an empty comment +tag with the whitespace control characters: `{#- -#}`. This causes all +whitespace between the end of the line and the beginning of the next, including +indentation, to be omitted on render. Sometimes we want to preserve a single +space. In those cases we put the space at the end of the line, followed by +`{# -#}`, which is a directive to remove following whitespace but not preceding. +We also use the whitespace control characters in most instances of tags with +control flow, for example `{%- if foo -%}`. + +[whitespace control]: https://tera.netlify.app/docs/#whitespace-control + +We want our templates to be readable, so we use indentation and newlines +liberally. We indent by four spaces after opening an HTML tag _or_ a Tera +tag. In most cases an HTML tag should be followed by a newline, but if the +tag has simple contents and fits with its close tag on a single line, the +contents don't necessarily need a new line. + +Tera templates support quite sophisticated control flow. To keep our templates +simple and understandable, we use only a subset: `if` and `for`. In particular +we avoid [assignments in the template logic](assignments) and [Tera +macros](macros). This also may make things easier if we switch to a different +Jinja-style template system, like Askama, in the future. + +[assignments]: https://tera.netlify.app/docs/#assignments +[macros]: https://tera.netlify.app/docs/#macros diff --git a/src/librustdoc/html/templates/page.html b/src/librustdoc/html/templates/page.html new file mode 100644 index 000000000..8e25f6764 --- /dev/null +++ b/src/librustdoc/html/templates/page.html @@ -0,0 +1,148 @@ +<!DOCTYPE html> {#- -#} +<html lang="en"> {#- -#} +<head> {#- -#} + <meta charset="utf-8"> {#- -#} + <meta name="viewport" content="width=device-width, initial-scale=1.0"> {#- -#} + <meta name="generator" content="rustdoc"> {#- -#} + <meta name="description" content="{{page.description}}"> {#- -#} + <meta name="keywords" content="{{page.keywords}}"> {#- -#} + <title>{{page.title}}</title> {#- -#} + <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}SourceSerif4-Regular.ttf.woff2"> {#- -#} + <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}FiraSans-Regular.woff2"> {#- -#} + <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}FiraSans-Medium.woff2"> {#- -#} + <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}SourceCodePro-Regular.ttf.woff2"> {#- -#} + <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}SourceSerif4-Bold.ttf.woff2"> {#- -#} + <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}SourceCodePro-Semibold.ttf.woff2"> {#- -#} + <link rel="stylesheet" type="text/css" {# -#} + href="{{static_root_path|safe}}normalize{{page.resource_suffix}}.css"> {#- -#} + <link rel="stylesheet" type="text/css" {# -#} + href="{{static_root_path|safe}}rustdoc{{page.resource_suffix}}.css" {# -#} + id="mainThemeStyle"> {#- -#} + {%- for theme in themes -%} + <link rel="stylesheet" type="text/css" {# -#} + href="{{static_root_path|safe}}{{theme}}{{page.resource_suffix}}.css" {# -#} + {%- if theme == "light" -%} + id="themeStyle" + {%- else -%} + disabled + {%- endif -%} + > + {%- endfor -%} + <script id="default-settings" {# -#} + {% for (k, v) in layout.default_settings %} + data-{{k}}="{{v}}" + {%- endfor -%} + ></script> {#- -#} + <script src="{{static_root_path|safe}}storage{{page.resource_suffix}}.js"></script> {#- -#} + {%- if page.css_class.contains("crate") -%} + <script defer src="{{page.root_path|safe}}crates{{page.resource_suffix}}.js"></script> {#- -#} + {%- else if page.css_class == "source" -%} + <script defer src="{{static_root_path|safe}}source-script{{page.resource_suffix}}.js"></script> {#- -#} + <script defer src="{{page.root_path|safe}}source-files{{page.resource_suffix}}.js"></script> {#- -#} + {%- else if !page.css_class.contains("mod") -%} + <script defer src="sidebar-items{{page.resource_suffix}}.js"></script> {#- -#} + {%- endif -%} + <script defer src="{{static_root_path|safe}}main{{page.resource_suffix}}.js"></script> {#- -#} + {%- if layout.scrape_examples_extension -%} + <script defer src="{{page.root_path|safe}}scrape-examples{{page.resource_suffix}}.js"></script> {#- -#} + {%- endif -%} + <noscript> {#- -#} + <link rel="stylesheet" {# -#} + href="{{static_root_path|safe}}noscript{{page.resource_suffix}}.css"> {#- -#} + </noscript> {#- -#} + {%- if layout.css_file_extension.is_some() -%} + <link rel="stylesheet" type="text/css" {# -#} + href="{{static_root_path|safe}}theme{{page.resource_suffix}}.css"> {#- -#} + {%- endif -%} + {%- if !layout.favicon.is_empty() -%} + <link rel="icon" href="{{layout.favicon}}"> {#- -#} + {%- else -%} + <link rel="alternate icon" type="image/png" {# -#} + href="{{static_root_path|safe}}favicon-16x16{{page.resource_suffix}}.png"> {#- -#} + <link rel="alternate icon" type="image/png" {# -#} + href="{{static_root_path|safe}}favicon-32x32{{page.resource_suffix}}.png"> {#- -#} + <link rel="icon" type="image/svg+xml" {# -#} + href="{{static_root_path|safe}}favicon{{page.resource_suffix}}.svg"> {#- -#} + {%- endif -%} + {{- layout.external_html.in_header|safe -}} +</head> {#- -#} +<body class="rustdoc {{page.css_class}}"> {#- -#} + <!--[if lte IE 11]> {#- -#} + <div class="warning"> {#- -#} + This old browser is unsupported and will most likely display funky things. {#- -#} + </div> {#- -#} + <![endif]--> {#- -#} + {{- layout.external_html.before_content|safe -}} + <nav class="mobile-topbar"> {#- -#} + <button class="sidebar-menu-toggle">☰</button> {#- -#} + <a class="sidebar-logo" href="{{page.root_path|safe}}{{krate_with_trailing_slash|safe}}index.html"> {#- -#} + <div class="logo-container"> {#- -#} + {%- if !layout.logo.is_empty() -%} + <img src="{{layout.logo}}" alt="logo"> {#- -#} + {%- else -%} + <img class="rust-logo" src="{{static_root_path|safe}}rust-logo{{page.resource_suffix}}.svg" alt="logo"> {#- -#} + {%- endif -%} + </div> {#- -#} + </a> {#- -#} + <h2 class="location"></h2> {#- -#} + </nav> {#- -#} + <nav class="sidebar"> {#- -#} + <a class="sidebar-logo" href="{{page.root_path|safe}}{{krate_with_trailing_slash|safe}}index.html"> {#- -#} + <div class="logo-container"> {#- -#} + {%- if !layout.logo.is_empty() %} + <img src="{{layout.logo}}" alt="logo"> {#- -#} + {%- else -%} + <img class="rust-logo" src="{{static_root_path|safe}}rust-logo{{page.resource_suffix}}.svg" alt="logo"> {#- -#} + {%- endif -%} + </div> {#- -#} + </a> {#- -#} + {{- sidebar|safe -}} + </nav> {#- -#} + <main> {#- -#} + <div class="width-limiter"> {#- -#} + <div class="sub-container"> {#- -#} + <a class="sub-logo-container" href="{{page.root_path|safe}}{{krate_with_trailing_slash|safe}}index.html"> {#- -#} + {%- if !layout.logo.is_empty() %} + <img src="{{layout.logo}}" alt="logo"> {#- -#} + {%- else -%} + <img class="rust-logo" src="{{static_root_path|safe}}rust-logo{{page.resource_suffix}}.svg" alt="logo"> {#- -#} + {%- endif -%} + </a> {#- -#} + <nav class="sub"> {#- -#} + <form class="search-form"> {#- -#} + <div class="search-container"> {#- -#} + <span></span> {#- This empty span is a hacky fix for Safari - See #93184 -#} + <input {# -#} + class="search-input" {# -#} + name="search" {# -#} + autocomplete="off" {# -#} + spellcheck="false" {# -#} + placeholder="Click or press ‘S’ to search, ‘?’ for more options…" {# -#} + type="search"> {#- -#} + <div id="help-button" title="help" tabindex="-1"> {#- -#} + <button type="button">?</button> {#- -#} + </div> {#- -#} + <div id="settings-menu" tabindex="-1"> {#- -#} + <a href="{{page.root_path|safe}}settings.html" title="settings"> {#- -#} + <img width="22" height="22" alt="Change settings" {# -#} + src="{{static_root_path|safe}}wheel{{page.resource_suffix}}.svg"> {#- -#} + </a> {#- -#} + </div> {#- -#} + </div> {#- -#} + </form> {#- -#} + </nav> {#- -#} + </div> {#- -#} + <section id="main-content" class="content">{{- content|safe -}}</section> {#- -#} + </div> {#- -#} + </main> {#- -#} + {{- layout.external_html.after_content|safe -}} + <div id="rustdoc-vars" {# -#} + data-root-path="{{page.root_path|safe}}" {# -#} + data-current-crate="{{layout.krate}}" {# -#} + data-themes="{{themes|join(",") }}" {# -#} + data-resource-suffix="{{page.resource_suffix}}" {# -#} + data-rustdoc-version="{{rustdoc_version}}" {# -#} + > {#- -#} + </div> {#- -#} +</body> {#- -#} +</html> {#- -#} diff --git a/src/librustdoc/html/templates/print_item.html b/src/librustdoc/html/templates/print_item.html new file mode 100644 index 000000000..c755157d2 --- /dev/null +++ b/src/librustdoc/html/templates/print_item.html @@ -0,0 +1,30 @@ +<div class="main-heading"> {#- -#} + <h1 class="fqn"> {#- -#} + <span class="in-band"> {#- -#} + {{-typ-}} + {#- The breadcrumbs of the item path, like std::string -#} + {%- for component in path_components -%} + <a href="{{component.path|safe}}index.html">{{component.name}}</a>::<wbr> + {%- endfor -%} + <a class="{{item_type}}" href="#">{{name}}</a> {#- -#} + <button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"> {#- -#} + <img src="{{static_root_path|safe}}clipboard{{page.resource_suffix}}.svg" {# -#} + width="19" height="18" {# -#} + alt="Copy item path"> {#- -#} + </button> {#- -#} + </span> {#- -#} + </h1> {#- -#} + <span class="out-of-band"> {#- -#} + {% if !stability_since_raw.is_empty() %} + {{- stability_since_raw|safe }} · {# -#} + {% endif %} + {%- match src_href -%} + {%- when Some with (href) -%} + <a class="srclink" href="{{href|safe}}">source</a> · {# -#} + {%- else -%} + {%- endmatch -%} + <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs"> {#- -#} + [<span class="inner">−</span>] {#- -#} + </a> {#- -#} + </span> {#- -#} +</div> {#- -#} diff --git a/src/librustdoc/html/tests.rs b/src/librustdoc/html/tests.rs new file mode 100644 index 000000000..437d3995e --- /dev/null +++ b/src/librustdoc/html/tests.rs @@ -0,0 +1,50 @@ +use crate::html::format::href_relative_parts; +use rustc_span::{sym, Symbol}; + +fn assert_relative_path(expected: &[Symbol], relative_to_fqp: &[Symbol], fqp: &[Symbol]) { + // No `create_default_session_globals_then` call is needed here because all + // the symbols used are static, and no `Symbol::intern` calls occur. + assert_eq!(expected, href_relative_parts(&fqp, &relative_to_fqp).collect::<Vec<_>>()); +} + +#[test] +fn href_relative_parts_basic() { + let relative_to_fqp = &[sym::std, sym::vec]; + let fqp = &[sym::std, sym::iter]; + assert_relative_path(&[sym::dotdot, sym::iter], relative_to_fqp, fqp); +} + +#[test] +fn href_relative_parts_parent_module() { + let relative_to_fqp = &[sym::std, sym::vec]; + let fqp = &[sym::std]; + assert_relative_path(&[sym::dotdot], relative_to_fqp, fqp); +} + +#[test] +fn href_relative_parts_different_crate() { + let relative_to_fqp = &[sym::std, sym::vec]; + let fqp = &[sym::core, sym::iter]; + assert_relative_path(&[sym::dotdot, sym::dotdot, sym::core, sym::iter], relative_to_fqp, fqp); +} + +#[test] +fn href_relative_parts_same_module() { + let relative_to_fqp = &[sym::std, sym::vec]; + let fqp = &[sym::std, sym::vec]; + assert_relative_path(&[], relative_to_fqp, fqp); +} + +#[test] +fn href_relative_parts_child_module() { + let relative_to_fqp = &[sym::std]; + let fqp = &[sym::std, sym::vec]; + assert_relative_path(&[sym::vec], relative_to_fqp, fqp); +} + +#[test] +fn href_relative_parts_root() { + let relative_to_fqp = &[]; + let fqp = &[sym::std]; + assert_relative_path(&[sym::std], relative_to_fqp, fqp); +} diff --git a/src/librustdoc/html/toc.rs b/src/librustdoc/html/toc.rs new file mode 100644 index 000000000..a12c2a6a1 --- /dev/null +++ b/src/librustdoc/html/toc.rs @@ -0,0 +1,191 @@ +//! Table-of-contents creation. + +/// A (recursive) table of contents +#[derive(Debug, PartialEq)] +pub(crate) struct Toc { + /// The levels are strictly decreasing, i.e. + /// + /// `entries[0].level >= entries[1].level >= ...` + /// + /// Normally they are equal, but can differ in cases like A and B, + /// both of which end up in the same `Toc` as they have the same + /// parent (Main). + /// + /// ```text + /// # Main + /// ### A + /// ## B + /// ``` + entries: Vec<TocEntry>, +} + +impl Toc { + fn count_entries_with_level(&self, level: u32) -> usize { + self.entries.iter().filter(|e| e.level == level).count() + } +} + +#[derive(Debug, PartialEq)] +pub(crate) struct TocEntry { + level: u32, + sec_number: String, + name: String, + id: String, + children: Toc, +} + +/// Progressive construction of a table of contents. +#[derive(PartialEq)] +pub(crate) struct TocBuilder { + top_level: Toc, + /// The current hierarchy of parent headings, the levels are + /// strictly increasing (i.e., `chain[0].level < chain[1].level < + /// ...`) with each entry being the most recent occurrence of a + /// heading with that level (it doesn't include the most recent + /// occurrences of every level, just, if it *is* in `chain` then + /// it is the most recent one). + /// + /// We also have `chain[0].level <= top_level.entries[last]`. + chain: Vec<TocEntry>, +} + +impl TocBuilder { + pub(crate) fn new() -> TocBuilder { + TocBuilder { top_level: Toc { entries: Vec::new() }, chain: Vec::new() } + } + + /// Converts into a true `Toc` struct. + pub(crate) fn into_toc(mut self) -> Toc { + // we know all levels are >= 1. + self.fold_until(0); + self.top_level + } + + /// Collapse the chain until the first heading more important than + /// `level` (i.e., lower level) + /// + /// Example: + /// + /// ```text + /// ## A + /// # B + /// # C + /// ## D + /// ## E + /// ### F + /// #### G + /// ### H + /// ``` + /// + /// If we are considering H (i.e., level 3), then A and B are in + /// self.top_level, D is in C.children, and C, E, F, G are in + /// self.chain. + /// + /// When we attempt to push H, we realize that first G is not the + /// parent (level is too high) so it is popped from chain and put + /// into F.children, then F isn't the parent (level is equal, aka + /// sibling), so it's also popped and put into E.children. + /// + /// This leaves us looking at E, which does have a smaller level, + /// and, by construction, it's the most recent thing with smaller + /// level, i.e., it's the immediate parent of H. + fn fold_until(&mut self, level: u32) { + let mut this = None; + loop { + match self.chain.pop() { + Some(mut next) => { + next.children.entries.extend(this); + if next.level < level { + // this is the parent we want, so return it to + // its rightful place. + self.chain.push(next); + return; + } else { + this = Some(next); + } + } + None => { + self.top_level.entries.extend(this); + return; + } + } + } + } + + /// Push a level `level` heading into the appropriate place in the + /// hierarchy, returning a string containing the section number in + /// `<num>.<num>.<num>` format. + pub(crate) fn push(&mut self, level: u32, name: String, id: String) -> &str { + assert!(level >= 1); + + // collapse all previous sections into their parents until we + // get to relevant heading (i.e., the first one with a smaller + // level than us) + self.fold_until(level); + + let mut sec_number; + { + let (toc_level, toc) = match self.chain.last() { + None => { + sec_number = String::new(); + (0, &self.top_level) + } + Some(entry) => { + sec_number = entry.sec_number.clone(); + sec_number.push('.'); + (entry.level, &entry.children) + } + }; + // fill in any missing zeros, e.g., for + // # Foo (1) + // ### Bar (1.0.1) + for _ in toc_level..level - 1 { + sec_number.push_str("0."); + } + let number = toc.count_entries_with_level(level); + sec_number.push_str(&(number + 1).to_string()) + } + + self.chain.push(TocEntry { + level, + name, + sec_number, + id, + children: Toc { entries: Vec::new() }, + }); + + // get the thing we just pushed, so we can borrow the string + // out of it with the right lifetime + let just_inserted = self.chain.last_mut().unwrap(); + &just_inserted.sec_number + } +} + +impl Toc { + fn print_inner(&self, v: &mut String) { + use std::fmt::Write as _; + + v.push_str("<ul>"); + for entry in &self.entries { + // recursively format this table of contents + let _ = write!( + v, + "\n<li><a href=\"#{id}\">{num} {name}</a>", + id = entry.id, + num = entry.sec_number, + name = entry.name + ); + entry.children.print_inner(&mut *v); + v.push_str("</li>"); + } + v.push_str("</ul>"); + } + pub(crate) fn print(&self) -> String { + let mut v = String::new(); + self.print_inner(&mut v); + v + } +} + +#[cfg(test)] +mod tests; diff --git a/src/librustdoc/html/toc/tests.rs b/src/librustdoc/html/toc/tests.rs new file mode 100644 index 000000000..014f34686 --- /dev/null +++ b/src/librustdoc/html/toc/tests.rs @@ -0,0 +1,79 @@ +use super::{Toc, TocBuilder, TocEntry}; + +#[test] +fn builder_smoke() { + let mut builder = TocBuilder::new(); + + // this is purposely not using a fancy macro like below so + // that we're sure that this is doing the correct thing, and + // there's been no macro mistake. + macro_rules! push { + ($level: expr, $name: expr) => { + assert_eq!(builder.push($level, $name.to_string(), "".to_string()), $name); + }; + } + push!(2, "0.1"); + push!(1, "1"); + { + push!(2, "1.1"); + { + push!(3, "1.1.1"); + push!(3, "1.1.2"); + } + push!(2, "1.2"); + { + push!(3, "1.2.1"); + push!(3, "1.2.2"); + } + } + push!(1, "2"); + push!(1, "3"); + { + push!(4, "3.0.0.1"); + { + push!(6, "3.0.0.1.0.1"); + } + push!(4, "3.0.0.2"); + push!(2, "3.1"); + { + push!(4, "3.1.0.1"); + } + } + + macro_rules! toc { + ($(($level: expr, $name: expr, $(($sub: tt))* )),*) => { + Toc { + entries: vec![ + $( + TocEntry { + level: $level, + name: $name.to_string(), + sec_number: $name.to_string(), + id: "".to_string(), + children: toc!($($sub),*) + } + ),* + ] + } + } + } + let expected = toc!( + (2, "0.1",), + ( + 1, + "1", + ((2, "1.1", ((3, "1.1.1",))((3, "1.1.2",))))(( + 2, + "1.2", + ((3, "1.2.1",))((3, "1.2.2",)) + )) + ), + (1, "2",), + ( + 1, + "3", + ((4, "3.0.0.1", ((6, "3.0.0.1.0.1",))))((4, "3.0.0.2",))((2, "3.1", ((4, "3.1.0.1",)))) + ) + ); + assert_eq!(expected, builder.into_toc()); +} diff --git a/src/librustdoc/html/url_parts_builder.rs b/src/librustdoc/html/url_parts_builder.rs new file mode 100644 index 000000000..1e6af6af6 --- /dev/null +++ b/src/librustdoc/html/url_parts_builder.rs @@ -0,0 +1,180 @@ +use std::fmt::{self, Write}; + +use rustc_span::Symbol; + +/// A builder that allows efficiently and easily constructing the part of a URL +/// after the domain: `nightly/core/str/struct.Bytes.html`. +/// +/// This type is a wrapper around the final `String` buffer, +/// but its API is like that of a `Vec` of URL components. +#[derive(Debug)] +pub(crate) struct UrlPartsBuilder { + buf: String, +} + +impl UrlPartsBuilder { + /// Create an empty buffer. + #[allow(dead_code)] + pub(crate) fn new() -> Self { + Self { buf: String::new() } + } + + /// Create an empty buffer with capacity for the specified number of bytes. + fn with_capacity_bytes(count: usize) -> Self { + Self { buf: String::with_capacity(count) } + } + + /// Create a buffer with one URL component. + /// + /// # Examples + /// + /// Basic usage: + /// + /// ```ignore (private-type) + /// let builder = UrlPartsBuilder::singleton("core"); + /// assert_eq!(builder.finish(), "core"); + /// ``` + /// + /// Adding more components afterward. + /// + /// ```ignore (private-type) + /// let mut builder = UrlPartsBuilder::singleton("core"); + /// builder.push("str"); + /// builder.push_front("nightly"); + /// assert_eq!(builder.finish(), "nightly/core/str"); + /// ``` + pub(crate) fn singleton(part: &str) -> Self { + Self { buf: part.to_owned() } + } + + /// Push a component onto the buffer. + /// + /// # Examples + /// + /// Basic usage: + /// + /// ```ignore (private-type) + /// let mut builder = UrlPartsBuilder::new(); + /// builder.push("core"); + /// builder.push("str"); + /// builder.push("struct.Bytes.html"); + /// assert_eq!(builder.finish(), "core/str/struct.Bytes.html"); + /// ``` + pub(crate) fn push(&mut self, part: &str) { + if !self.buf.is_empty() { + self.buf.push('/'); + } + self.buf.push_str(part); + } + + /// Push a component onto the buffer, using [`format!`]'s formatting syntax. + /// + /// # Examples + /// + /// Basic usage (equivalent to the example for [`UrlPartsBuilder::push`]): + /// + /// ```ignore (private-type) + /// let mut builder = UrlPartsBuilder::new(); + /// builder.push("core"); + /// builder.push("str"); + /// builder.push_fmt(format_args!("{}.{}.html", "struct", "Bytes")); + /// assert_eq!(builder.finish(), "core/str/struct.Bytes.html"); + /// ``` + pub(crate) fn push_fmt(&mut self, args: fmt::Arguments<'_>) { + if !self.buf.is_empty() { + self.buf.push('/'); + } + self.buf.write_fmt(args).unwrap() + } + + /// Push a component onto the front of the buffer. + /// + /// # Examples + /// + /// Basic usage: + /// + /// ```ignore (private-type) + /// let mut builder = UrlPartsBuilder::new(); + /// builder.push("core"); + /// builder.push("str"); + /// builder.push_front("nightly"); + /// builder.push("struct.Bytes.html"); + /// assert_eq!(builder.finish(), "nightly/core/str/struct.Bytes.html"); + /// ``` + pub(crate) fn push_front(&mut self, part: &str) { + let is_empty = self.buf.is_empty(); + self.buf.reserve(part.len() + if !is_empty { 1 } else { 0 }); + self.buf.insert_str(0, part); + if !is_empty { + self.buf.insert(part.len(), '/'); + } + } + + /// Get the final `String` buffer. + pub(crate) fn finish(self) -> String { + self.buf + } +} + +/// This is just a guess at the average length of a URL part, +/// used for [`String::with_capacity`] calls in the [`FromIterator`] +/// and [`Extend`] impls, and for [estimating item path lengths]. +/// +/// The value `8` was chosen for two main reasons: +/// +/// * It seems like a good guess for the average part length. +/// * jemalloc's size classes are all multiples of eight, +/// which means that the amount of memory it allocates will often match +/// the amount requested, avoiding wasted bytes. +/// +/// [estimating item path lengths]: estimate_item_path_byte_length +const AVG_PART_LENGTH: usize = 8; + +/// Estimate the number of bytes in an item's path, based on how many segments it has. +/// +/// **Note:** This is only to be used with, e.g., [`String::with_capacity()`]; +/// the return value is just a rough estimate. +pub(crate) const fn estimate_item_path_byte_length(segment_count: usize) -> usize { + AVG_PART_LENGTH * segment_count +} + +impl<'a> FromIterator<&'a str> for UrlPartsBuilder { + fn from_iter<T: IntoIterator<Item = &'a str>>(iter: T) -> Self { + let iter = iter.into_iter(); + let mut builder = Self::with_capacity_bytes(AVG_PART_LENGTH * iter.size_hint().0); + iter.for_each(|part| builder.push(part)); + builder + } +} + +impl<'a> Extend<&'a str> for UrlPartsBuilder { + fn extend<T: IntoIterator<Item = &'a str>>(&mut self, iter: T) { + let iter = iter.into_iter(); + self.buf.reserve(AVG_PART_LENGTH * iter.size_hint().0); + iter.for_each(|part| self.push(part)); + } +} + +impl FromIterator<Symbol> for UrlPartsBuilder { + fn from_iter<T: IntoIterator<Item = Symbol>>(iter: T) -> Self { + // This code has to be duplicated from the `&str` impl because of + // `Symbol::as_str`'s lifetimes. + let iter = iter.into_iter(); + let mut builder = Self::with_capacity_bytes(AVG_PART_LENGTH * iter.size_hint().0); + iter.for_each(|part| builder.push(part.as_str())); + builder + } +} + +impl Extend<Symbol> for UrlPartsBuilder { + fn extend<T: IntoIterator<Item = Symbol>>(&mut self, iter: T) { + // This code has to be duplicated from the `&str` impl because of + // `Symbol::as_str`'s lifetimes. + let iter = iter.into_iter(); + self.buf.reserve(AVG_PART_LENGTH * iter.size_hint().0); + iter.for_each(|part| self.push(part.as_str())); + } +} + +#[cfg(test)] +mod tests; diff --git a/src/librustdoc/html/url_parts_builder/tests.rs b/src/librustdoc/html/url_parts_builder/tests.rs new file mode 100644 index 000000000..636e1ab55 --- /dev/null +++ b/src/librustdoc/html/url_parts_builder/tests.rs @@ -0,0 +1,64 @@ +use super::*; + +fn t(builder: UrlPartsBuilder, expect: &str) { + assert_eq!(builder.finish(), expect); +} + +#[test] +fn empty() { + t(UrlPartsBuilder::new(), ""); +} + +#[test] +fn singleton() { + t(UrlPartsBuilder::singleton("index.html"), "index.html"); +} + +#[test] +fn push_several() { + let mut builder = UrlPartsBuilder::new(); + builder.push("core"); + builder.push("str"); + builder.push("struct.Bytes.html"); + t(builder, "core/str/struct.Bytes.html"); +} + +#[test] +fn push_front_empty() { + let mut builder = UrlPartsBuilder::new(); + builder.push_front("page.html"); + t(builder, "page.html"); +} + +#[test] +fn push_front_non_empty() { + let mut builder = UrlPartsBuilder::new(); + builder.push("core"); + builder.push("str"); + builder.push("struct.Bytes.html"); + builder.push_front("nightly"); + t(builder, "nightly/core/str/struct.Bytes.html"); +} + +#[test] +fn push_fmt() { + let mut builder = UrlPartsBuilder::new(); + builder.push_fmt(format_args!("{}", "core")); + builder.push("str"); + builder.push_front("nightly"); + builder.push_fmt(format_args!("{}.{}.html", "struct", "Bytes")); + t(builder, "nightly/core/str/struct.Bytes.html"); +} + +#[test] +fn collect() { + t(["core", "str"].into_iter().collect(), "core/str"); + t(["core", "str", "struct.Bytes.html"].into_iter().collect(), "core/str/struct.Bytes.html"); +} + +#[test] +fn extend() { + let mut builder = UrlPartsBuilder::singleton("core"); + builder.extend(["str", "struct.Bytes.html"]); + t(builder, "core/str/struct.Bytes.html"); +} |
