Source code
Revision control
Copy as Markdown
Other Tools
<html>
<head>
<title>Pointer Events interaction with drag and drop</title>
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" type="text/css" href="../pointerevent_styles.css">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<!-- Additional helper script for common checks across event types -->
<script type="text/javascript" src="../pointerevent_support.js"></script>
<script>
var eventList = ['pointerdown', 'pointerup', 'pointercancel', 'gotpointercapture', 'lostpointercapture', 'dragstart', 'mousedown'];
PhaseEnum = {
DndWithoutCapture: 0,
DndWithCapture: 1,
DndWithCaptureMouse: 2,
DndPrevented: 3,
Done: 4,
};
var phase = PhaseEnum.DndWithoutCapture;
var received_events = [];
var pointerId = -1;
function resetTestState() {
phase = PhaseEnum.DndWithoutCapture;
}
function run() {
var test_pointerEvent = setup_pointerevent_test("pointer events vs drag and drop", ['mouse']);
var target0 = document.querySelector('#target0');
var target1 = document.querySelector('#target1');
function handleEvent(e) {
if (e.type == 'pointerdown') {
received_events = [];
if (phase == PhaseEnum.DndWithCapture) {
target0.setPointerCapture(e.pointerId);
} else if (phase == PhaseEnum.DndWithCaptureMouse) {
pointerId = e.pointerId;
}
}
if (e.type == 'mousedown') {
if (phase == PhaseEnum.DndWithCaptureMouse) {
target0.setPointerCapture(pointerId);
}
}
received_events.push(e.type + "@" + e.target.id);
if (e.type == 'dragstart') {
e.dataTransfer.setData('text/plain', 'dragstart test');
if (phase == PhaseEnum.DndPrevented)
e.preventDefault();
}
if (phase == PhaseEnum.DndWithoutCapture && e.type == 'pointercancel') {
phase++;
test(() => {
assert_equals(received_events.join(', '), "pointerdown@target0, mousedown@target0, dragstart@target0, pointercancel@target0", "Pointercancel should be fired with the expected order when drag operation starts.");
}, "Pointercancel when drag operation starts");
} else if (phase == PhaseEnum.DndWithCapture && e.type == 'lostpointercapture') {
test(() => {
assert_equals(received_events.join(', '), "pointerdown@target0, mousedown@target0, gotpointercapture@target0, dragstart@target0, pointercancel@target0, lostpointercapture@target0", "Pointercancel and lostpointercapture should be fired with the expected order when drag operation starts.");
}, "Pointercancel while capturing when drag operation starts");
phase++;
} else if (phase == PhaseEnum.DndWithCaptureMouse && e.type == 'lostpointercapture') {
test(() => {
assert_equals(received_events.join(', '), "pointerdown@target0, mousedown@target0, gotpointercapture@target0, dragstart@target0, pointercancel@target0, lostpointercapture@target0", "Pointercancel and lostpointercapture should be fired with the expected order when drag operation starts.");
}, "Pointercancel while capturing on mousedown when drag operation starts");
phase++;
} else if (phase == PhaseEnum.DndPrevented && e.type == 'pointerup') {
test(() => {
assert_equals(received_events.join(', '), "pointerdown@target0, mousedown@target0, dragstart@target0, pointerup@target1", "Pointerevent stream shouldn't get interrupted when drag is prevented.");
}, "Pointerevent stream when drag is prevented.");
phase++;
test_pointerEvent.done();
}
}
eventList.forEach(function(eventName) {
on_event(target0, eventName, handleEvent);
on_event(target1, eventName, handleEvent);
});
}
</script>
</head>
<body onload="run()">
<h1>Pointer Events interaction with drag and drop</h1>
<h2 id="pointerTypeDescription"></h2>
<h4>
Test Description: This test checks that the pointercancel (and if needed lostpointercapture) is dispatched when drag starts.
<ol>
<li>Press down on the black square.</li>
<li>Move your pointer to purple square and release.</li>
<li>Repeat the first two steps.</li>
<li>Repeat the first two steps once again.</li>
<li>Repeat the first two steps once again.</li>
</ol>
Test passes if the proper behavior of the events is observed.
</h4>
<div id="testContainer">
<div draggable="true" id="target0"></div>
<div id="target1"></div>
</div>
</body>
</html>