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script: Move TaskManager to GlobalScope (#34827)

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This is a simplification of the internal `TaskQueue` API that moves the
`TaskManager` to the `GlobalScope` itself. In addition, the handling of
cancellers is moved to the `TaskManager` as well. This means that no
arguments other than the `task` are necessary for queueing tasks, which
makes the API a lot easier to use and cleaner.

`TaskSource` now also keeps a copy of the canceller with it, so that
they always know the proper way to cancel any tasks queued on them.

There is one complication here. The event loop `sender` for dedicated
workers is constantly changing as it is set to `None` when not handling
messages. This is because this sender keeps a handle to the main
thread's `Worker` object, preventing garbage collection while any
messages are still in flight or being handled. This change allows
setting the `sender` on the `TaskManager` to `None` to allow proper
garbabge collection.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-01-04 09:41:50 +01:00 • committed by GitHub
parent 75a22cfe2e
commit b2eda71952
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54 changed files with 1060 additions and 1516 deletions
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5
components/script/dom/textcontrol.rs
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@ -300,8 +300,8 @@ impl<'a, E: TextControlElement> TextControlSelection<'a, E> {
// Step 6
if textinput.selection_state() != original_selection_state {
let window = self.element.owner_window();
window
self.element
.owner_window()
.task_manager()
.user_interaction_task_source()
.queue_event(
@ -309,7 +309,6 @@ impl<'a, E: TextControlElement> TextControlSelection<'a, E> {
atom!("select"),
EventBubbles::Bubbles,
EventCancelable::NotCancelable,
&window,
);
}