зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
2.7 KiB
HTML
88 строки
2.7 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=607464
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-->
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<head>
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<title>Test for Bug 607464</title>
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<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<script type="text/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
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<script type="text/javascript" src="/tests/gfx/layers/apz/test/mochitest/apz_test_utils.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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</head>
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<body>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=607464">Mozilla Bug 607464</a>
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<p id="display"></p>
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<div id="content" style="display: none">
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</div>
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<pre id="test">
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<script type="application/javascript;version=1.7">
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/**
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* Test for Bug 607464:
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* Pixel scrolling shouldn't scroll smoothly, even if general.smoothScroll is on.
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**/
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function scrollDown150PxWithPixelScrolling(scrollbox) {
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var win = scrollbox.ownerDocument.defaultView;
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let event = {
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deltaMode: WheelEvent.DOM_DELTA_PIXEL,
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deltaY: 30.0,
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lineOrPageDeltaY: 1
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};
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// A pixel scroll with lineOrPageDeltaY.
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synthesizeWheel(scrollbox, 10, 10, event, win);
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// then 4 pixel scrolls without lineOrPageDeltaY.
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event.lineOrPageDeltaY = 0;
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for (let i = 0; i < 4; ++i) {
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synthesizeWheel(scrollbox, 10, 10, event, win);
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}
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// Note: the line scroll shouldn't have any effect because it has
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// hasPixels = true set on it. We send it to emulate normal
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// behavior.
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}
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function runTest() {
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var win = open('data:text/html,<!DOCTYPE html>\n' +
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'<div id="scrollbox" style="height: 100px; overflow: auto;">' +
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' <div style="height: 1000px;"></div>' +
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'</div>', '_blank', 'width=300,height=300');
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SimpleTest.waitForFocus(function () {
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var scrollbox = win.document.getElementById("scrollbox");
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let scrollTopBefore = scrollbox.scrollTop;
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win.addEventListener("scroll", function(e) {
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is(scrollbox.scrollTop % 30, 0,
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"Pixel scrolling should happen instantly, not smoothly. The " +
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"scroll position " + scrollbox.scrollTop + " in this sequence of wheel " +
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"events should be a multiple of 30.");
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if (scrollbox.scrollTop == 150) {
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win.close();
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SimpleTest.finish();
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}
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}, true);
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flushApzRepaints(function() {
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scrollDown150PxWithPixelScrolling(scrollbox);
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}, win);
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}, win);
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}
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window.onload = function() {
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SpecialPowers.pushPrefEnv({
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"set":[["general.smoothScroll", true],
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["mousewheel.acceleration.start", -1],
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["mousewheel.system_scroll_override_on_root_content.enabled", false]]}, runTest);
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}
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SimpleTest.waitForExplicitFinish();
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SimpleTest.testInChaosMode();
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</script>
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</pre>
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</body>
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</html>
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