LayoutTests/compositing/overflow/out-of-flow-pos-descendants-should-affect-all-ancestors.html - Issue 14863002: Only update composited-scrolling state once after layout.

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Issue 14863002: Only update composited-scrolling state once after layout. (Closed) Base URL: svn://svn.chromium.org/blink/trunk

Patch Set: subtreeHasOutOfFlowPositionedDescendant -> subtreeContainsOutOfFlowPositionedLayer Created 7 years, 7 months ago

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	1 <!DOCTYPE html>

	2 <html>

	3 <head>

	4 <style>

	5 div {

	6 height: 500px;

	7 width: 500px;

	8 padding: 3px;

	9 border-style: solid;

	10 border-color: black;

	11 border-width: 1px;

	12 overflow: scroll;

	13 }

	14

	15 .filler {

	16 position: relative;

	17 top: 1000px;

	18 }

	19

	20 button {

	21 display: none;

	22 }

	23 </style>

	24 <script>

	25 // This test ensures that when an element's style changes in such a

	26 // way that it remains out-of-flow positioned, but its containing

	27 // block changes, we correctly update elements' has-unclipped-

	28 // descendant property. Since no layers will opt out due to stacking

	29 // issues, we can judge whether we're setting this state correctly

	30 // by which layers opt-in.
	Julien - ping for review 2013/05/09 23:26:41 Ideally this should be visible by someone opening Ideally this should be visible by someone opening the test (if it starts failing e.g.).
	31 if (window.internals)

	32 window.internals.settings.setAcceleratedCompositingForOverflowSc rollEnabled(true);

	33

	34 if (window.testRunner)

	35 window.testRunner.dumpAsText();

	36

	37 function doTest()

	38 {

	39 if (!window.internals) {

	40 document.getElementById('toggle1').style.display = 'block';

	41 document.getElementById('toggle2').style.display = 'block';

	42 document.body.offsetTop;

	43 return;

	44 }

	45

	46 var result = window.internals.layerTreeAsText(document);

	47 var oofp1 = document.getElementById('oofp1');

	48 var oofp2 = document.getElementById('oofp2');

	49

	50 oofp1.style.position = 'fixed';

	51 document.body.offsetTop;

	52 result += window.internals.layerTreeAsText(document);

	53

	54 oofp2.style.position = 'fixed';

	55 document.body.offsetTop;

	56 result += window.internals.layerTreeAsText(document);

	57

	58 oofp1.style.position = 'absolute';

	59 document.body.offsetTop;

	60 result += window.internals.layerTreeAsText(document);

	61

	62 oofp2.style.position = 'absolute';

	63 document.body.offsetTop;

	64 result += window.internals.layerTreeAsText(document);

	65

	66 document.getElementById('console').innerHTML = result;

	67 }

	68

	69 window.addEventListener('load', doTest, false);

	70 </script>

	71 </head>

	72 <body>

	73 <div>

	74 <div style="width: 450px; height: 450px">

	75 <div style="width: 400px; height: 400px">

	76 <div style="width: 350px; height: 350px">

	77 <div style="position: relative; width: 300px; height: 15 0px">

	78 <div id="oofp1" style="position: absolute; backgroun d-color: red; height: 50px; width: 50px; left: 50px; overflow: hidden">

	79 </div>

	80 <div class="filler"></div>

	81 </div>

	82 <div style="position: relative; width: 300px; height: 15 0px">

	83 <div style="width: 250px; height: 100px">

	84 <div id="oofp2" style="position: absolute; backg round-color: red; height: 50px; width: 50px; left: 50px; overflow: hidden"></div >

	85 <div class="filler"></div>

	86 </div>

	87 <div class="filler"></div>

	88 </div>

	89 <div class="filler"></div>

	90 </div>

	91 <div class="filler"></div>

	92 </div>

	93 <div class="filler"></div>

	94 </div>

	95 <div class="filler"></div>

	96 </div>

	97 <pre id='console'>This test requires window.internals</pre>

	98

	99 <button id='toggle1' onClick="document.getElementById('oofp1').style.pos ition = document.getElementById('oofp1').style.position === 'fixed' ? 'absolute' : 'fixed'">toggle 1</button>

	100 <button id='toggle2' onClick="document.getElementById('oofp2').style.pos ition = document.getElementById('oofp2').style.position === 'fixed' ? 'absolute' : 'fixed'">toggle 2</button>

	101 </body>

	102 </html>

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