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script: Ensure that leaving the WebView sets the cursor back to the default cursor (#38759)

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This changes makes a variety of changes to ensure that the cursor is set
back to the default cursor when it leaves the `WebView`:

1. Display list updates can come after a mouse leaves the `WebView`, so
   when refreshing the cursor after the update, base the updated cursor
   on the last hovered location in the `DocumentEventHandler`, rather
   than the compositor. This allows us to catch when the last hovered
   position is `None` (ie the cursor has left the `WebView`).
2. When handling `MouseLeftViewport` events for the cursor leaving the
   entire WebView, properly set the
   MouseLeftViewport::focus_moving_to_another_iframe` on the input event
   passed to the script thread.
3. When moving out of the `WebView` entirely, explicitly ask the
   embedder to set the cursor back to the default.

Testing: This change adds a unit test verifying this behavior.
Fixes: #38710.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-08-22 00:49:56 -07:00 • committed by GitHub
parent 66adf2bf9f
commit 4784ff0375
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11 changed files with 164 additions and 90 deletions
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3
components/shared/embedder/lib.rs
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@ -55,9 +55,10 @@ pub enum ShutdownState {
/// A cursor for the window. This is different from a CSS cursor (see
/// `CursorKind`) in that it has no `Auto` value.
#[repr(u8)]
#[derive(Clone, Copy, Debug, Deserialize, Eq, MallocSizeOf, PartialEq, Serialize)]
#[derive(Clone, Copy, Debug, Default, Deserialize, Eq, MallocSizeOf, PartialEq, Serialize)]
pub enum Cursor {
None,
#[default]
Default,
Pointer,
ContextMenu,