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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Test that scroll snap wont't happen on zoomed content</title>
<script src="apz_test_utils.js"></script>
<script src="apz_test_native_event_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<style>
body {
margin: 0;
}
html {
overflow-y: scroll;
scroll-snap-type: y proximity;
}
.snap {
width: 100vw;
height: 100vh;
background-color: blue;
position: absolute;
top: 200px;
scroll-snap-align: start;
}
</style>
</head>
<body>
<div class="snap"></div>
<div style="width: 100%; height: 500vh;"></div>
<script type="application/javascript">
async function test() {
let transformEndPromise = promiseTransformEnd();
// Use scrollToVisual() to scroll visual viewport.
SpecialPowers.DOMWindowUtils.scrollToVisual(
100, 400,
SpecialPowers.DOMWindowUtils.UPDATE_TYPE_MAIN_THREAD,
SpecialPowers.DOMWindowUtils.SCROLL_MODE_SMOOTH);
// Wait for the end of the scroll.
await transformEndPromise;
await waitToClearOutAnyPotentialScrolls();
const pageTop = visualViewport.pageTop;
const pageLeft = visualViewport.pageLeft;
let eventFired = false;
window.visualViewport.addEventListener("scroll", () => {
eventFired = true;
});
// Trigger a scroll snap, it should nothing.
SpecialPowers.wrap(document.documentElement).mozScrollSnap();
await waitToClearOutAnyPotentialScrolls();
ok(!eventFired, "No visual scroll should happen");
// Sanity checks to see whether the visual viewport hasn't been changed.
is(visualViewport.pageTop, pageTop);
is(visualViewport.pageLeft, pageLeft);
}
SpecialPowers.DOMWindowUtils.setResolutionAndScaleTo(10.0);
waitUntilApzStable()
.then(test)
.then(subtestDone, subtestFailed);
</script>
</body>
</html>