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Implement basics of link preloading (#37036)

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These changes allow a minimal set of checks for font-src
CSP checks to pass.

Part of #4577
Part of #35035

---------

Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>
This commit is contained in:
Tim van der Lippe 2025-05-29 13:26:27 +02:00 • committed by GitHub
parent 9dc1391bef
commit 36e4886da1
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GPG key ID: B5690EEEBB952194
174 changed files with 2814 additions and 1097 deletions
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32
components/script/dom/htmlimageelement.rs
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@ -34,9 +34,8 @@ use servo_url::ServoUrl;
use servo_url::origin::MutableOrigin;
use style::attr::{AttrValue, LengthOrPercentageOrAuto, parse_integer, parse_length};
use style::context::QuirksMode;
use style::media_queries::MediaList;
use style::parser::ParserContext;
use style::stylesheets::{CssRuleType, Origin, UrlExtraData};
use style::stylesheets::{CssRuleType, Origin};
use style::values::specified::AbsoluteLength;
use style::values::specified::length::{Length, NoCalcLength};
use style::values::specified::source_size_list::SourceSizeList;
@ -678,7 +677,7 @@ impl HTMLImageElement {
// Step 4.6
if let Some(x) = element.get_attribute(&ns!(), &local_name!("media")) {
if !self.matches_environment(x.value().to_string()) {
if !elem.matches_environment(&x.value()) {
continue;
}
}
@ -722,33 +721,6 @@ impl HTMLImageElement {
result
}
/// <https://html.spec.whatwg.org/multipage/#matches-the-environment>
fn matches_environment(&self, media_query: String) -> bool {
let document = self.owner_document();
let quirks_mode = document.quirks_mode();
let document_url_data = UrlExtraData(document.url().get_arc());
// FIXME(emilio): This should do the same that we do for other media
// lists regarding the rule type and such, though it doesn't really
// matter right now...
//
// Also, ParsingMode::all() is wrong, and should be DEFAULT.
let context = ParserContext::new(
Origin::Author,
&document_url_data,
Some(CssRuleType::Style),
ParsingMode::all(),
quirks_mode,
/* namespaces = */ Default::default(),
None,
None,
);
let mut parserInput = ParserInput::new(&media_query);
let mut parser = Parser::new(&mut parserInput);
let media_list = MediaList::parse(&context, &mut parser);
let result = media_list.evaluate(document.window().layout().device(), quirks_mode);
result
}
/// <https://html.spec.whatwg.org/multipage/#normalise-the-source-densities>
fn normalise_source_densities(&self, source_set: &mut SourceSet, width: Option<Length>) {
// Step 1