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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
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gfx/layers/apz/test/mochitest/helper_tap_passive.html Normal file
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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width; initial-scale=1.0">
<title>Ensure APZ doesn't wait for passive listeners</title>
<script type="application/javascript" src="apz_test_native_event_utils.js"></script>
<script type="application/javascript" src="apz_test_utils.js"></script>
<script type="application/javascript" src="/tests/SimpleTest/paint_listener.js"></script>
<script type="application/javascript">
var touchdownTime;
function longPressLink() {
synthesizeNativeTouch(document.getElementById('b'), 5, 5, SpecialPowers.DOMWindowUtils.TOUCH_CONTACT, function() {
dump("Finished synthesizing touch-start, waiting for events...\n");
});
}
var touchstartReceived = false;
function recordEvent(e) {
if (!touchstartReceived) {
touchstartReceived = true;
is(e.type, 'touchstart', 'Got a touchstart');
e.preventDefault(); // should be a no-op because it's a passive listener
return;
}
// If APZ decides to wait for the content response on a particular input block,
// it needs to wait until both the touchstart and touchmove event are handled
// by the main thread. In this case there is no touchmove at all, so APZ would
// end up waiting indefinitely and time out the test. The fact that we get this
// contextmenu event (mouselongtap on Windows) at all means that APZ decided
// not to wait for the content response, which is the desired behaviour, since
// the touchstart listener was registered as a passive listener.
if (getPlatform() == "windows") {
is(e.type, 'mouselongtap', 'Got a mouselongtap');
} else {
is(e.type, 'contextmenu', 'Got a contextmenu');
}
e.preventDefault();
synthesizeNativeTouch(document.getElementById('b'), 5, 5, SpecialPowers.DOMWindowUtils.TOUCH_REMOVE, function() {
dump("Finished synthesizing touch-end to clear state; finishing test...\n");
subtestDone();
});
}
window.addEventListener('touchstart', recordEvent, { passive: true, capture: true });
if (getPlatform() == "windows") {
SpecialPowers.addChromeEventListener('mouselongtap', recordEvent, true);
} else {
window.addEventListener('contextmenu', recordEvent, true);
}
waitUntilApzStable()
.then(longPressLink);
</script>
</head>
<body>
<a id="b" href="#">Link to nowhere</a>
</body>
</html>