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// Copyright 2014-2017 The html5ever Project Developers. See the
// COPYRIGHT file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use crate::interface::{LimitedQuirks, NoQuirks, Quirks, QuirksMode};
use crate::tendril::StrTendril;
use crate::tokenizer::Doctype;
// These should all be lowercase, for ASCII-case-insensitive matching.
static QUIRKY_PUBLIC_PREFIXES: &'static [&'static str] = &[
"-//advasoft ltd//dtd html 3.0 aswedit + extensions//",
"-//as//dtd html 3.0 aswedit + extensions//",
"-//ietf//dtd html 2.0 level 1//",
"-//ietf//dtd html 2.0 level 2//",
"-//ietf//dtd html 2.0 strict level 1//",
"-//ietf//dtd html 2.0 strict level 2//",
"-//ietf//dtd html 2.0 strict//",
"-//ietf//dtd html 2.0//",
"-//ietf//dtd html 2.1e//",
"-//ietf//dtd html 3.0//",
"-//ietf//dtd html 3.2 final//",
"-//ietf//dtd html 3.2//",
"-//ietf//dtd html 3//",
"-//ietf//dtd html level 0//",
"-//ietf//dtd html level 1//",
"-//ietf//dtd html level 2//",
"-//ietf//dtd html level 3//",
"-//ietf//dtd html strict level 0//",
"-//ietf//dtd html strict level 1//",
"-//ietf//dtd html strict level 2//",
"-//ietf//dtd html strict level 3//",
"-//ietf//dtd html strict//",
"-//ietf//dtd html//",
"-//metrius//dtd metrius presentational//",
"-//microsoft//dtd internet explorer 2.0 html strict//",
"-//microsoft//dtd internet explorer 2.0 html//",
"-//microsoft//dtd internet explorer 2.0 tables//",
"-//microsoft//dtd internet explorer 3.0 html strict//",
"-//microsoft//dtd internet explorer 3.0 html//",
"-//microsoft//dtd internet explorer 3.0 tables//",
"-//netscape comm. corp.//dtd html//",
"-//netscape comm. corp.//dtd strict html//",
"-//o'reilly and associates//dtd html 2.0//",
"-//o'reilly and associates//dtd html extended 1.0//",
"-//o'reilly and associates//dtd html extended relaxed 1.0//",
"-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//",
"-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//",
"-//spyglass//dtd html 2.0 extended//",
"-//sq//dtd html 2.0 hotmetal + extensions//",
"-//sun microsystems corp.//dtd hotjava html//",
"-//sun microsystems corp.//dtd hotjava strict html//",
"-//w3c//dtd html 3 1995-03-24//",
"-//w3c//dtd html 3.2 draft//",
"-//w3c//dtd html 3.2 final//",
"-//w3c//dtd html 3.2//",
"-//w3c//dtd html 3.2s draft//",
"-//w3c//dtd html 4.0 frameset//",
"-//w3c//dtd html 4.0 transitional//",
"-//w3c//dtd html experimental 19960712//",
"-//w3c//dtd html experimental 970421//",
"-//w3c//dtd w3 html//",
"-//w3o//dtd w3 html 3.0//",
"-//webtechs//dtd mozilla html 2.0//",
"-//webtechs//dtd mozilla html//",
];
static QUIRKY_PUBLIC_MATCHES: &'static [&'static str] = &[
"-//w3o//dtd w3 html strict 3.0//en//",
"-/w3c/dtd html 4.0 transitional/en",
"html",
];
static QUIRKY_SYSTEM_MATCHES: &'static [&'static str] =
&["http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"];
static LIMITED_QUIRKY_PUBLIC_PREFIXES: &'static [&'static str] = &[
"-//w3c//dtd xhtml 1.0 frameset//",
"-//w3c//dtd xhtml 1.0 transitional//",
];
static HTML4_PUBLIC_PREFIXES: &'static [&'static str] = &[
"-//w3c//dtd html 4.01 frameset//",
"-//w3c//dtd html 4.01 transitional//",
];
pub fn doctype_error_and_quirks(doctype: &Doctype, iframe_srcdoc: bool) -> (bool, QuirksMode) {
fn opt_string_as_slice<'t>(x: &'t Option<String>) -> Option<&'t str> {
x.as_ref().map(|y| &y[..])
}
fn opt_tendril_as_slice<'t>(x: &'t Option<StrTendril>) -> Option<&'t str> {
match *x {
Some(ref t) => Some(t),
None => None,
}
}
fn opt_to_ascii_lower(x: Option<&str>) -> Option<String> {
x.map(|y| y.to_ascii_lowercase())
}
let name = opt_tendril_as_slice(&doctype.name);
let public = opt_tendril_as_slice(&doctype.public_id);
let system = opt_tendril_as_slice(&doctype.system_id);
let err = match (name, public, system) {
(Some("html"), None, None) |
(Some("html"), None, Some("about:legacy-compat")) |
(Some("html"), Some("-//W3C//DTD HTML 4.0//EN"), None) |
(
Some("html"),
Some("-//W3C//DTD HTML 4.0//EN"),
Some("http://www.w3.org/TR/REC-html40/strict.dtd"),
) |
(Some("html"), Some("-//W3C//DTD HTML 4.01//EN"), None) |
(
Some("html"),
Some("-//W3C//DTD HTML 4.01//EN"),
Some("http://www.w3.org/TR/html4/strict.dtd"),
) |
(
Some("html"),
Some("-//W3C//DTD XHTML 1.0 Strict//EN"),
Some("http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"),
) |
(
Some("html"),
Some("-//W3C//DTD XHTML 1.1//EN"),
Some("http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"),
) => false,
_ => true,
};
// FIXME: We could do something asymptotically faster here.
// But there aren't many strings, and this happens at most once per parse.
fn contains_pfx(haystack: &[&str], needle: &str) -> bool {
haystack.iter().any(|&x| needle.starts_with(x))
}
// Quirks-mode matches are case-insensitive.
let public = opt_to_ascii_lower(public);
let system = opt_to_ascii_lower(system);
let quirk = match (opt_string_as_slice(&public), opt_string_as_slice(&system)) {
_ if doctype.force_quirks => Quirks,
_ if name != Some("html") => Quirks,
_ if iframe_srcdoc => NoQuirks,
(Some(ref p), _) if QUIRKY_PUBLIC_MATCHES.contains(p) => Quirks,
(_, Some(ref s)) if QUIRKY_SYSTEM_MATCHES.contains(s) => Quirks,
(Some(p), _) if contains_pfx(QUIRKY_PUBLIC_PREFIXES, p) => Quirks,
(Some(p), _) if contains_pfx(LIMITED_QUIRKY_PUBLIC_PREFIXES, p) => LimitedQuirks,
(Some(p), s) if contains_pfx(HTML4_PUBLIC_PREFIXES, p) => match s {
None => Quirks,
Some(_) => LimitedQuirks,
},
_ => NoQuirks,
};
(err, quirk)
}
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