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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/layout_thread_2020/lib.rs
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@ -23,7 +23,7 @@ use euclid::default::{Point2D as UntypedPoint2D, Rect as UntypedRect, Size2D as
use euclid::{Point2D, Scale, Size2D, Vector2D};
use fnv::FnvHashMap;
use fonts::{FontContext, FontContextWebFontMethods};
use fonts_traits::WebFontLoadFinishedCallback;
use fonts_traits::StylesheetWebFontLoadFinishedCallback;
use fxhash::FxHashMap;
use ipc_channel::ipc::IpcSender;
use layout::context::LayoutContext;
@ -602,7 +602,7 @@ impl LayoutThread {
stylesheet,
guard,
self.stylist.device(),
Arc::new(web_font_finished_loading_callback) as WebFontLoadFinishedCallback,
Arc::new(web_font_finished_loading_callback) as StylesheetWebFontLoadFinishedCallback,
);
}