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script: do not update Document rendering when waiting on asynchronous canvas image updates (#39022)

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This is fixup for #37776. We forget to skip documents with
waiting_on_canvas_image_updates flag.

Testing: Existing WPT tests and manual testing
Fixes: #39021

---------

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
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Sam 2025-08-29 17:09:19 +02:00 • committed by GitHub
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4
components/script/dom/document.rs
View file

@ -2743,6 +2743,10 @@ impl Document {
self.waiting_on_canvas_image_updates.set(false);
}
pub(crate) fn waiting_on_canvas_image_updates(&self) -> bool {
self.waiting_on_canvas_image_updates.get()
}
/// From <https://drafts.csswg.org/css-font-loading/#fontfaceset-pending-on-the-environment>:
///
/// > A FontFaceSet is pending on the environment if any of the following are true:

4
components/script/script_thread.rs
View file

@ -1158,6 +1158,10 @@ impl ScriptThread {
continue;
}
if document.waiting_on_canvas_image_updates() {
continue;
}
// TODO(#31581): The steps in the "Revealing the document" section need to be implemented
// `process_pending_input_events` handles the focusing steps as well as other events
// from the compositor.