зеркало из https://github.com/mozilla/gecko-dev.git
47 строки
1.5 KiB
HTML
47 строки
1.5 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test that scaled elements with scrolled contents don't repaint unnecessarily when we scroll inside them</title>
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<script src="/tests/SimpleTest/paint_listener.js"></script>
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</head>
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<!-- Need a timeout here to allow paint unsuppression before we start the test -->
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<body onload="setTimeout(startTest,0)" style="background:white;">
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<iframe id="t" style="-moz-transform: scale(0.48979); -moz-transform-origin:top left; width:500px; height:600px;"
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src="transformed_scrolling_repaints_3_window_frame.html">
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</iframe>
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<pre id="test">
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<script type="application/javascript">
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var SimpleTest = window.opener.SimpleTest;
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var SpecialPowers = window.opener.SpecialPowers;
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var is = window.opener.is;
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var smoothScrollPref = "general.smoothScroll";
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function startTest() {
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SpecialPowers.pushPrefEnv({"set":[[smoothScrollPref, false]]}, runTest);
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}
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async function runTest() {
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let t = document.getElementById("t");
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let e = t.contentDocument.getElementById("e");
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t.contentWindow.scrollTo(0,0);
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let utils = SpecialPowers.getDOMWindowUtils(window);
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for (let i = 0; i < 15; i++) {
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let painted = utils.checkAndClearPaintedState(e);
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// We ignore the first few scrolls, to ensure we have triggered activity
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// heuristics.
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if (i >= 5) {
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is(painted, false,
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"Fully-visible scrolled element should not have been painted");
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}
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t.contentWindow.scrollByLines(1);
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await promiseAllPaintsDone(null, true);
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}
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SimpleTest.finish();
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window.close();
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}
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</script>
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</pre>
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</body>
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</html>
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