Stephen A Pohl
5c406a7341
After a top-level navigation, the new PresShell has no per-PresShell mouse state until a real mouse event arrives. PresShell::SynthesizeMouseMove bails on that empty state, so a JS-driven cursor or :hover change (e.g. `body.style.cursor = 'none'` triggered by a keypress) does not take effect until the user moves the mouse. PointerEventHandler still holds the static last-mouse state from before the navigation. When the previous owning PresShell has been torn down, claim that state for the new PresShell. The existing path in ProcessSynthMouseMoveEvent then dispatches a synthetic eMouseMove at the cached position. Gate the claim with three checks. Skip if another live PresShell still owns the state (e.g. a popup). Skip unless the widget that originally recorded the state matches aRootPresShell's widget, since PresShell::IsRoot() means root of the in-process presContext tree and the previous owner could have been on a different top-level window in the same content process. And use a new sLastMousePointerId static for the recovered pointerId, since sLastPointerId tracks any pointer (including touch) and would mismatch the eMouseMove dispatched downstream. Differential Revision: https://phabricator.services.mozilla.com/D301688
23 lines
471 B
HTML
23 lines
471 B
HTML
<!doctype html>
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<title>Test for bug 2038491: synth mouse move dispatches after top-level navigation</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<script>
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SimpleTest.waitForExplicitFinish();
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function reportResult(passed, msg) {
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ok(passed, msg);
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SimpleTest.finish();
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}
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function runTest() {
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window.open(
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"file_synthmousemove_after_navigation.html",
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"_blank",
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"width=400,height=400"
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);
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}
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SimpleTest.waitForFocus(runTest);
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</script>
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