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script: add skeleton implementation of FontFace API (#35262)

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This patch implements the `FontFace` interface, but with some caveats

1. The interface is only exposed on `Window`. Support for Workers will
   be handled in the future.
2. The concept of `css-connected` `FontFace` is not implemented, so
   `@font-face` rules in stylesheets will not be represented in the DOM.
3. The constructor only supports using `url()` strings as source
   and `ArrayBuffer` and `ArrayBufferView` are not supported yet.

A skeleton implementation of the `load` method of `FontFaceSet` is also
implemented in this patch. The intention is to support some web pages
that don't load without this method.

Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>
This commit is contained in:
Mukilan Thiyagarajan 2025-02-19 11:20:01 +05:30 • committed by GitHub
parent 29e0fad21e
commit 56840e0a35
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52 changed files with 1160 additions and 551 deletions
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4
components/script/task_source.rs
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@ -27,6 +27,8 @@ pub(crate) enum TaskSourceName {
Canvas,
DOMManipulation,
FileReading,
/// <https://drafts.csswg.org/css-font-loading/#task-source>
FontLoading,
HistoryTraversal,
Networking,
PerformanceTimeline,
@ -48,6 +50,7 @@ impl From<TaskSourceName> for ScriptThreadEventCategory {
TaskSourceName::Canvas => ScriptThreadEventCategory::ScriptEvent,
TaskSourceName::DOMManipulation => ScriptThreadEventCategory::ScriptEvent,
TaskSourceName::FileReading => ScriptThreadEventCategory::FileRead,
TaskSourceName::FontLoading => ScriptThreadEventCategory::FontLoading,
TaskSourceName::HistoryTraversal => ScriptThreadEventCategory::HistoryEvent,
TaskSourceName::Networking => ScriptThreadEventCategory::NetworkEvent,
TaskSourceName::PerformanceTimeline => {
@ -71,6 +74,7 @@ impl TaskSourceName {
TaskSourceName::Canvas,
TaskSourceName::DOMManipulation,
TaskSourceName::FileReading,
TaskSourceName::FontLoading,
TaskSourceName::HistoryTraversal,
TaskSourceName::Networking,
TaskSourceName::PerformanceTimeline,