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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use cssparser::SourceLocation;
use nsstring::nsCString;
use servo_arc::Arc;
use style::context::QuirksMode;
use style::gecko::data::GeckoStyleSheet;
use style::gecko_bindings::bindings;
use style::gecko_bindings::bindings::Gecko_LoadStyleSheet;
use style::gecko_bindings::structs::{Loader, LoaderReusableStyleSheets};
use style::gecko_bindings::structs::{
SheetLoadData, SheetLoadDataHolder, StyleSheet as DomStyleSheet,
};
use style::gecko_bindings::sugar::refptr::RefPtr;
use style::global_style_data::GLOBAL_STYLE_DATA;
use style::media_queries::MediaList;
use style::parser::ParserContext;
use style::shared_lock::{Locked, SharedRwLock};
use style::stylesheets::import_rule::{ImportLayer, ImportSheet, ImportSupportsCondition};
use style::stylesheets::AllowImportRules;
use style::stylesheets::{ImportRule, Origin, StylesheetLoader as StyleStylesheetLoader};
use style::stylesheets::{StylesheetContents, UrlExtraData};
use style::use_counters::UseCounters;
use style::values::CssUrl;
pub struct StylesheetLoader(
*mut Loader,
*mut DomStyleSheet,
*mut SheetLoadData,
*mut LoaderReusableStyleSheets,
);
impl StylesheetLoader {
pub fn new(
loader: *mut Loader,
parent: *mut DomStyleSheet,
parent_load_data: *mut SheetLoadData,
reusable_sheets: *mut LoaderReusableStyleSheets,
) -> Self {
StylesheetLoader(loader, parent, parent_load_data, reusable_sheets)
}
}
impl StyleStylesheetLoader for StylesheetLoader {
fn request_stylesheet(
&self,
url: CssUrl,
source_location: SourceLocation,
_context: &ParserContext,
lock: &SharedRwLock,
media: Arc<Locked<MediaList>>,
supports: Option<ImportSupportsCondition>,
layer: ImportLayer,
) -> Arc<Locked<ImportRule>> {
// Ensure the supports conditions for this @import are true, if not, refuse to load
if !supports.as_ref().map_or(true, |s| s.enabled) {
return Arc::new(lock.wrap(ImportRule {
url,
stylesheet: ImportSheet::new_refused(),
supports,
layer,
source_location,
}));
}
// After we get this raw pointer ImportRule will be moved into a lock and Arc
// and so the Arc<Url> pointer inside will also move,
// but the Url it points to or the allocating backing the String inside that Url won’t,
// so this raw pointer will still be valid.
let child_sheet =
unsafe { Gecko_LoadStyleSheet(self.0, self.1, self.2, self.3, &url, media.into()) };
debug_assert!(
!child_sheet.is_null(),
"Import rules should always have a strong sheet"
);
let sheet = unsafe { GeckoStyleSheet::from_addrefed(child_sheet) };
let stylesheet = ImportSheet::new(sheet);
Arc::new(lock.wrap(ImportRule {
url,
stylesheet,
supports,
layer,
source_location,
}))
}
}
pub struct AsyncStylesheetParser {
load_data: RefPtr<SheetLoadDataHolder>,
extra_data: UrlExtraData,
bytes: nsCString,
origin: Origin,
quirks_mode: QuirksMode,
line_number_offset: u32,
should_record_use_counters: bool,
allow_import_rules: AllowImportRules,
}
impl AsyncStylesheetParser {
pub fn new(
load_data: RefPtr<SheetLoadDataHolder>,
extra_data: UrlExtraData,
bytes: nsCString,
origin: Origin,
quirks_mode: QuirksMode,
line_number_offset: u32,
should_record_use_counters: bool,
allow_import_rules: AllowImportRules,
) -> Self {
AsyncStylesheetParser {
load_data,
extra_data,
bytes,
origin,
quirks_mode,
line_number_offset,
should_record_use_counters,
allow_import_rules,
}
}
pub fn parse(self) {
let global_style_data = &*GLOBAL_STYLE_DATA;
let input: &str = unsafe { (*self.bytes).as_str_unchecked() };
let use_counters = if self.should_record_use_counters {
Some(Box::new(UseCounters::default()))
} else {
None
};
// Note: Parallel CSS parsing doesn't report CSS errors. When errors are
// being logged, Gecko prevents the parallel parsing path from running.
let sheet = StylesheetContents::from_str(
input,
self.extra_data.clone(),
self.origin,
&global_style_data.shared_lock,
Some(&self),
None,
self.quirks_mode.into(),
self.line_number_offset,
use_counters.as_deref(),
self.allow_import_rules,
/* sanitized_output = */ None,
);
unsafe {
bindings::Gecko_StyleSheet_FinishAsyncParse(
self.load_data.get(),
sheet.into(),
use_counters.map_or(std::ptr::null_mut(), Box::into_raw),
);
}
}
}
impl StyleStylesheetLoader for AsyncStylesheetParser {
fn request_stylesheet(
&self,
url: CssUrl,
source_location: SourceLocation,
_context: &ParserContext,
lock: &SharedRwLock,
media: Arc<Locked<MediaList>>,
supports: Option<ImportSupportsCondition>,
layer: ImportLayer,
) -> Arc<Locked<ImportRule>> {
// Ensure the supports conditions for this @import are true, if not, refuse to load
if !supports.as_ref().map_or(true, |s| s.enabled) {
return Arc::new(lock.wrap(ImportRule {
url: url.clone(),
stylesheet: ImportSheet::new_refused(),
supports,
layer,
source_location,
}));
}
let stylesheet = ImportSheet::new_pending();
let rule = Arc::new(lock.wrap(ImportRule {
url: url.clone(),
stylesheet,
supports,
layer,
source_location,
}));
unsafe {
bindings::Gecko_LoadStyleSheetAsync(
self.load_data.get(),
&url,
media.into(),
rule.clone().into(),
);
}
rule
}
}
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