зеркало из https://github.com/mozilla/gecko-dev.git
Bug 367028 - Prevent drag-and-drop operation while dragging a scrollbar; r=masayuki
Differential Revision: https://phabricator.services.mozilla.com/D131736
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Родитель
875a34857d
Коммит
e88b81fa72
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@ -1267,8 +1267,9 @@ void nsSliderFrame::DragThumb(bool aGrabMouseEvents) {
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mDragFinished = !aGrabMouseEvents;
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if (aGrabMouseEvents) {
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PresShell::SetCapturingContent(GetContent(),
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CaptureFlags::IgnoreAllowedState);
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PresShell::SetCapturingContent(
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GetContent(),
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CaptureFlags::IgnoreAllowedState | CaptureFlags::PreventDragStart);
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} else {
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PresShell::ReleaseCapturingContent();
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}
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@ -8,3 +8,5 @@ support-files =
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skip-if = toolkit == 'android' #bug 798806
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[test_bug563416.html]
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skip-if = toolkit == 'android'
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[test_drag_thumb_in_link.html]
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skip-if = toolkit == 'android'
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@ -0,0 +1,76 @@
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<!DOCTYPE HTML>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=367028
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-->
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<head>
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<title>Test for Bug 367028</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<script src="/tests/SimpleTest/EventUtils.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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<style>
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#scroller {
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display: block;
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width: 200px;
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height: 100px;
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overflow: scroll;
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background: beige;
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border: 1px solid black;
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}
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#biggerblock {
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display: block;
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width: 100px;
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height: 150px;
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line-height: 150px;
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white-space: nowrap;
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overflow: hidden;
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background: khaki;
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}
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</style>
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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=367028">Mozilla Bug 367028</a>
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<p id="display"></p>
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<div id="content" style="display: none"></div>
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<a id="scroller" href="#">
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block anchor<span id="biggerblock">bigger block</span>
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</a>
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<script type="application/javascript">
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function waitForEvent(aTarget, aEvent) {
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return new Promise(aResolve => {
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aTarget.addEventListener(aEvent, aResolve, { once: true });
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});
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}
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/** Test for Bug 367028 **/
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add_task(async function drag_thumb_in_link() {
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let scroller = document.getElementById("scroller");
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scroller.ondragstart = function(e) {
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e.preventDefault();
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ok(false, "dragging on scroller bar should not trigger drag-and-drop operation");
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scroller.ondragstart = null;
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};
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// Click the scroll bar.
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let x = scroller.getBoundingClientRect().width - 5;
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let y = scroller.getBoundingClientRect().height - 70;
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synthesizeMouse(scroller, x, y, { type : "mousedown" }, window);
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synthesizeMouse(scroller, x, y, { type : "mousemove" }, window);
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let scrollPromise = waitForEvent(scroller, "scroll");
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x = scroller.getBoundingClientRect().width + 20;
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y = scroller.getBoundingClientRect().height - 30;
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synthesizeMouse(scroller, x, y, { type : "mousemove" }, window);
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synthesizeMouse(scroller, x, y, { type : "mouseup" }, window);
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await scrollPromise;
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ok(true, "Dragging scroller bar should scroll");
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scroller.ondragstart = null;
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});
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</script>
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</body>
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</html>
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