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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
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gfx/layers/apz/test/mochitest/helper_bug1280013.html Normal file
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<!DOCTYPE HTML>
<html style="overflow:hidden">
<head>
<meta charset="utf-8">
<!-- The viewport tag will result in APZ being in a "zoomed-in" state, assuming
the device width is less than 980px. -->
<meta name="viewport" content="width=980; initial-scale=1.0">
<title>Test for bug 1280013</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>
<script type="application/javascript">
function* test(testDriver) {
SimpleTest.ok(screen.height > 500, "Screen height must be at least 500 pixels for this test to work");
// This listener will trigger the test to continue once APZ is done with
// processing the scroll.
SpecialPowers.Services.obs.addObserver(testDriver, "APZ:TransformEnd", false);
// Scroll down to the iframe. Do it in two drags instead of one in case the
// device screen is short
yield synthesizeNativeTouchDrag(document.body, 10, 400, 0, -(350 + TOUCH_SLOP));
yield synthesizeNativeTouchDrag(document.body, 10, 400, 0, -(350 + TOUCH_SLOP));
// Now the top of the visible area should be at y=700 of the top-level page,
// so if the screen is >= 500px tall, the entire iframe should be visible, at
// least vertically.
// However, because of the overflow:hidden on the root elements, all this
// scrolling is happening in APZ and is not reflected in the main-thread
// scroll position (it is stored in the callback transform instead). We check
// this by checking the scroll offset.
yield flushApzRepaints(testDriver);
SimpleTest.is(window.scrollY, 0, "Main-thread scroll position is still at 0");
// Scroll the iframe by 300px. Note that since the main-thread scroll position
// is still 0, the subframe's getBoundingClientRect is going to be off by
// 700 pixels, so we compensate for that here.
var subframe = document.getElementById('subframe');
yield synthesizeNativeTouchDrag(subframe, 10, 200 - 700, 0, -(300 + TOUCH_SLOP));
// Remove the observer, we don't need it any more.
SpecialPowers.Services.obs.removeObserver(testDriver, "APZ:TransformEnd", false);
// Flush any pending paints
yield flushApzRepaints(testDriver);
// get the displayport for the subframe
var utils = SpecialPowers.getDOMWindowUtils(window);
var contentPaints = utils.getContentAPZTestData().paints;
var lastPaint = convertScrollFrameData(contentPaints[contentPaints.length - 1].scrollFrames);
var foundIt = 0;
for (var scrollId in lastPaint) {
if (('contentDescription' in lastPaint[scrollId]) &&
(lastPaint[scrollId]['contentDescription'].includes('tall_html'))) {
var dp = getPropertyAsRect(lastPaint, scrollId, 'criticalDisplayport');
SimpleTest.ok(dp.y <= 0, 'The critical displayport top should be less than or equal to zero to cover the visible part of the subframe; it is ' + dp.y);
SimpleTest.ok(dp.y + dp.h >= subframe.clientHeight, 'The critical displayport bottom should be greater than the clientHeight; it is ' + (dp.y + dp.h));
foundIt++;
}
}
SimpleTest.is(foundIt, 1, "Found exactly one critical displayport for the subframe we were interested in.");
}
waitUntilApzStable()
.then(runContinuation(test))
.then(subtestDone);
</script>
</head>
<body style="overflow:hidden">
The iframe below is at (0, 800). Scroll it into view, and then scroll the contents. The content should be fully rendered in high-resolution.
<iframe id="subframe" style="position:absolute; left: 0px; top: 800px; width: 600px; height: 350px" src="helper_tall.html"></iframe>
</body>
</html>