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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. | |
31 if (window.internals) { | |
32 window.internals.settings.setAcceleratedCompositingForOverflowSc
rollEnabled(true); | |
33 window.internals.settings.setCompositorDrivenAcceleratedScrollin
gEnabled(false); | |
34 } | |
35 | |
36 if (window.testRunner) | |
37 window.testRunner.dumpAsText(); | |
38 | |
39 function doTest() | |
40 { | |
41 if (!window.internals) { | |
42 document.getElementById('toggle1').style.display = 'block'; | |
43 document.getElementById('toggle2').style.display = 'block'; | |
44 document.body.offsetTop; | |
45 return; | |
46 } | |
47 | |
48 var result = window.internals.layerTreeAsText(document); | |
49 var oofp1 = document.getElementById('oofp1'); | |
50 var oofp2 = document.getElementById('oofp2'); | |
51 | |
52 oofp1.style.position = 'fixed'; | |
53 document.body.offsetTop; | |
54 result += window.internals.layerTreeAsText(document); | |
55 | |
56 oofp2.style.position = 'fixed'; | |
57 document.body.offsetTop; | |
58 result += window.internals.layerTreeAsText(document); | |
59 | |
60 oofp1.style.position = 'absolute'; | |
61 document.body.offsetTop; | |
62 result += window.internals.layerTreeAsText(document); | |
63 | |
64 oofp2.style.position = 'absolute'; | |
65 document.body.offsetTop; | |
66 result += window.internals.layerTreeAsText(document); | |
67 | |
68 document.getElementById('console').innerHTML = result; | |
69 } | |
70 | |
71 window.addEventListener('load', doTest, false); | |
72 </script> | |
73 </head> | |
74 <body> | |
75 <div> | |
76 <div style="width: 450px; height: 450px"> | |
77 <div style="width: 400px; height: 400px"> | |
78 <div style="width: 350px; height: 350px"> | |
79 <div style="position: relative; width: 300px; height: 15
0px"> | |
80 <div id="oofp1" style="position: absolute; backgroun
d-color: red; height: 50px; width: 50px; left: 50px; overflow: hidden"> | |
81 </div> | |
82 <div class="filler"></div> | |
83 </div> | |
84 <div style="position: relative; width: 300px; height: 15
0px"> | |
85 <div style="width: 250px; height: 100px"> | |
86 <div id="oofp2" style="position: absolute; backg
round-color: red; height: 50px; width: 50px; left: 50px; overflow: hidden"></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 <div class="filler"></div> | |
98 </div> | |
99 <pre id='console'>This test requires window.internals</pre> | |
100 | |
101 <button id='toggle1' onClick="document.getElementById('oofp1').style.pos
ition = document.getElementById('oofp1').style.position === 'fixed' ? 'absolute'
: 'fixed'">toggle 1</button> | |
102 <button id='toggle2' onClick="document.getElementById('oofp2').style.pos
ition = document.getElementById('oofp2').style.position === 'fixed' ? 'absolute'
: 'fixed'">toggle 2</button> | |
103 </body> | |
104 </html> | |
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