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style: Implement scripting media feature

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Implemented the scripting media feature.

Not locked behind a pref as it does not do anything new or particularly
give new data which could be used for fingerprinting (see <noscript>,
etc).

Also added new WPT tests (none previously). Not supported in any other
browsers yet.

Test page: https://goose.icu/media-scripting

Differential Revision: https://phabricator.services.mozilla.com/D172995
This commit is contained in:
CanadaHonk 2023-03-28 08:01:49 +00:00 • committed by Martin Robinson
parent d2217be803
commit 46a569ef45
1 changed files with 33 additions and 1 deletions
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34
components/style/gecko/media_features.rs
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@ -563,6 +563,32 @@ fn eval_moz_platform(_: &Context, query_value: Option<Platform>) -> bool {
unsafe { bindings::Gecko_MediaFeatures_MatchesPlatform(query_value) } unsafe { bindings::Gecko_MediaFeatures_MatchesPlatform(query_value) }
} }
/// Values for the scripting media feature.
/// https://drafts.csswg.org/mediaqueries-5/#scripting
#[derive(Clone, Copy, Debug, FromPrimitive, Parse, PartialEq, ToCss)]
#[repr(u8)]
pub enum Scripting {
/// Scripting is not supported or not enabled
None,
/// Scripting is supported and enabled, but only for initial page load
/// We will never match this value as it is intended for non-browser user agents,
/// but it is part of the spec so we should still parse it.
/// See: https://github.com/w3c/csswg-drafts/issues/8621
InitialOnly,
/// Scripting is supported and enabled
Enabled
}
/// https://drafts.csswg.org/mediaqueries-5/#scripting
fn eval_scripting(context: &Context, query_value: Option<Scripting>) -> bool {
let scripting =
unsafe { bindings::Gecko_MediaFeatures_Scripting(context.device().document()) };
match query_value {
Some(v) => v == scripting,
None => scripting != Scripting::None,
}
}
fn eval_moz_windows_non_native_menus(context: &Context) -> bool { fn eval_moz_windows_non_native_menus(context: &Context) -> bool {
unsafe { bindings::Gecko_MediaFeatures_WindowsNonNativeMenus(context.device().document()) } unsafe { bindings::Gecko_MediaFeatures_WindowsNonNativeMenus(context.device().document()) }
} }
@ -643,7 +669,7 @@ macro_rules! bool_pref_feature {
/// to support new types in these entries and (2) ensuring that either /// to support new types in these entries and (2) ensuring that either
/// nsPresContext::MediaFeatureValuesChanged is called when the value that /// nsPresContext::MediaFeatureValuesChanged is called when the value that
/// would be returned by the evaluator function could change. /// would be returned by the evaluator function could change.
pub static MEDIA_FEATURES: [QueryFeatureDescription; 65] = [ pub static MEDIA_FEATURES: [QueryFeatureDescription; 66] = [
feature!( feature!(
atom!("width"), atom!("width"),
AllowsRanges::Yes, AllowsRanges::Yes,
@ -826,6 +852,12 @@ pub static MEDIA_FEATURES: [QueryFeatureDescription; 65] = [
keyword_evaluator!(eval_video_dynamic_range, DynamicRange), keyword_evaluator!(eval_video_dynamic_range, DynamicRange),
FeatureFlags::empty(), FeatureFlags::empty(),
), ),
feature!(
atom!("scripting"),
AllowsRanges::No,
keyword_evaluator!(eval_scripting, Scripting),
FeatureFlags::empty(),
),
// Evaluates to the preferred color scheme for content. Only useful in // Evaluates to the preferred color scheme for content. Only useful in
// chrome context, where the chrome color-scheme and the content // chrome context, where the chrome color-scheme and the content
// color-scheme might differ. // color-scheme might differ.