53 lines
1.6 KiB
HTML
53 lines
1.6 KiB
HTML
<html class="reftest-wait">
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<!--
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For bug 1266833; syncing the scroll offset to APZ properly when the scroll
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position is clamped to a smaller value during a frame reconstruction.
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-->
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<script>
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function run() {
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document.body.scrollTop = document.body.scrollTopMax;
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// Let the scroll position propagate to APZ before we do the frame
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// reconstruction. Ideally we would wait for flushApzRepaints here but
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// we don't have access to DOMWindowUtils in a reftest, so we just wait
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// 100ms to approximate it. With bug 1266833 fixed, this test should
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// never fail regardless of what this timeout value is.
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setTimeout(frameReconstruction, 100);
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}
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function frameReconstruction() {
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document.body.classList.toggle('noscroll');
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document.documentElement.classList.toggle('reconstruct-body');
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document.getElementById('spacer').style.height = '100%';
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document.documentElement.classList.remove('reftest-wait');
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}
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</script>
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<style>
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html, body {
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margin: 0;
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padding: 0;
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background-color: green;
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}
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.noscroll {
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overflow: hidden;
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height: 100%;
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}
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/* Toggling this on and off triggers a frame reconstruction on the <body> */
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html.reconstruct-body::before {
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top: 0;
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content: '';
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display: block;
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height: 2px;
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position: absolute;
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width: 100%;
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z-index: 99;
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}
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</style>
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<body onload="setTimeout(run, 0)">
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<div id="spacer" style="height: 5000px">
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This is the top of the page.
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</div>
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This is the bottom of the page.
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</body>
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