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+<!DOCTYPE HTML>
+<html>
+<head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width; initial-scale=1.0">
+ <title>Dragging the mouse on a content-implemented scrollbar</title>
+ <script type="application/javascript" src="apz_test_native_event_utils.js"></script>
+ <script type="application/javascript" src="apz_test_utils.js"></script>
+ <script type="application/javascript" src="/tests/SimpleTest/paint_listener.js"></script>
+ <style>
+ body {
+ background: linear-gradient(135deg, red, blue);
+ }
+ #scrollbar {
+ position:fixed;
+ top: 0;
+ right: 10px;
+ height: 100%;
+ width: 150px;
+ background-color: gray;
+ }
+ </style>
+ <script type="text/javascript">
+var bar = null;
+var mouseDown = false;
+
+function moveTo(mouseY, testDriver) {
+ var fraction = (mouseY - bar.getBoundingClientRect().top) / bar.getBoundingClientRect().height;
+ fraction = Math.max(0, fraction);
+ fraction = Math.min(1, fraction);
+ var oldScrollPos = document.scrollingElement.scrollTop;
+ var newScrollPos = fraction * window.scrollMaxY;
+ SimpleTest.ok(newScrollPos > oldScrollPos, "Scroll position strictly increased");
+ // split the scroll in two with a paint in between, just to increase the
+ // complexity of the simulated web content, and to ensure this works as well.
+ document.scrollingElement.scrollTop = (oldScrollPos + newScrollPos) / 2;
+ waitForAllPaints(function() {
+ document.scrollingElement.scrollTop = newScrollPos;
+ testDriver();
+ });
+}
+
+function setupDragging(testDriver) {
+ bar = document.getElementById('scrollbar');
+ mouseDown = false;
+
+ bar.addEventListener('mousedown', function(e) {
+ mouseDown = true;
+ moveTo(e.clientY, testDriver);
+ }, true);
+
+ bar.addEventListener('mousemove', function(e) {
+ if (mouseDown) {
+ dump("Got mousemove clientY " + e.clientY + "\n");
+ moveTo(e.clientY, testDriver);
+ e.stopPropagation();
+ }
+ }, true);
+
+ bar.addEventListener('mouseup', function(e) {
+ mouseDown = false;
+ }, true);
+
+ window.addEventListener('mousemove', function(e) {
+ if (mouseDown) {
+ SimpleTest.ok(false, "The mousemove at " + e.clientY + " was not stopped by the bar listener, and is a glitchy event!");
+ setTimeout(testDriver, 0);
+ }
+ }, false);
+}
+
+function* test(testDriver) {
+ setupDragging(testDriver);
+
+ // Move the mouse to the "scrollbar" (the div upon which dragging changes scroll position)
+ yield synthesizeNativeMouseEvent(bar, 10, 10, nativeMouseMoveEventMsg(), testDriver);
+ // mouse down
+ yield synthesizeNativeMouseEvent(bar, 10, 10, nativeMouseDownEventMsg());
+ // drag vertically by 400px, in 50px increments
+ yield synthesizeNativeMouseEvent(bar, 10, 60, nativeMouseMoveEventMsg());
+ yield synthesizeNativeMouseEvent(bar, 10, 110, nativeMouseMoveEventMsg());
+ yield synthesizeNativeMouseEvent(bar, 10, 160, nativeMouseMoveEventMsg());
+ yield synthesizeNativeMouseEvent(bar, 10, 210, nativeMouseMoveEventMsg());
+ yield synthesizeNativeMouseEvent(bar, 10, 260, nativeMouseMoveEventMsg());
+ yield synthesizeNativeMouseEvent(bar, 10, 310, nativeMouseMoveEventMsg());
+ yield synthesizeNativeMouseEvent(bar, 10, 360, nativeMouseMoveEventMsg());
+ yield synthesizeNativeMouseEvent(bar, 10, 410, nativeMouseMoveEventMsg());
+ // and release
+ yield synthesizeNativeMouseEvent(bar, 10, 410, nativeMouseUpEventMsg(), testDriver);
+}
+
+waitUntilApzStable()
+.then(runContinuation(test))
+.then(subtestDone);
+
+ </script>
+</head>
+<body>
+
+<div id="scrollbar">Drag up and down on this bar. The background/scrollbar shouldn't glitch</div>
+This is a tall page<br/>
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+
+</body>
+</html>