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Rename InputEvent::MouseLeave to InputEvent::MouseLeftViewport (#38695)

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1. `InputEvent::MouseLeave` indicates that mouse has left the viewport
(fired by embedder) or iframe (synthesized in Constellation
f24f225db8/components/constellation/constellation_webview.rs (L119-L122)).
Its handler in script is named as `handle_mouse_leave_event`, which is
very misleading as we have DOM event
[mouseleave](https://w3c.github.io/uievents/#event-type-mouseleave). I
rename it to `MouseLeftViewport` to be consistent with
`WindowEvent::CursorLeft`:
f24f225db8/ports/servoshell/desktop/headed_window.rs (L632-L638)
2. Add doc and rename function, such as `handle_mouse_move_event` to
`handle_native_mouse_move_event` to be closer to
[spec](https://w3c.github.io/uievents/#handle-native-mouse-move).

Testing: Just renaming + skipping unnecessary hit-test in simple case.
Fixes: Nothing but preparing for #38670 and #38435.

---------

Signed-off-by: Euclid Ye <euclid.ye@huawei.com>
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Euclid Ye 2025-08-15 17:54:54 +08:00 • committed by GitHub
parent 8b574539d1
commit 494493ceb7
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6 changed files with 33 additions and 27 deletions
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2
components/constellation/tracing.rs
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@ -96,7 +96,7 @@ mod from_compositor {
InputEvent::Keyboard(..) => target_variant!("Keyboard"),
InputEvent::MouseButton(..) => target_variant!("MouseButton"),
InputEvent::MouseMove(..) => target_variant!("MouseMove"),
InputEvent::MouseLeave(..) => target_variant!("MouseLeave"),
InputEvent::MouseLeftViewport(..) => target_variant!("MouseLeftViewport"),
InputEvent::Touch(..) => target_variant!("Touch"),
InputEvent::Wheel(..) => target_variant!("Wheel"),
InputEvent::Scroll(..) => target_variant!("Scroll"),