| <!DOCTYPE HTML> |
| <!-- |
| This test checks that when overlay scrollbars are repositioned due to |
| accelerated overflow scrolling, that their position accounts for any |
| intervening, composited ancestors. The test is working correctly if the |
| scrollbars are correctly positioned on top of the scroller and the scrolled |
| contents. |
| --> |
| <style> |
| #scroller { |
| overflow: scroll; |
| width: 100px; |
| height: 100px; |
| border: 1px solid black; |
| } |
| |
| .scrolled { |
| background: blue; |
| width: 60px; |
| height: 40px; |
| margin: 4px; |
| position: relative; |
| } |
| |
| #fixed { |
| background: green; |
| position: fixed; |
| left: 60px; |
| top: 60px; |
| width: 80px; |
| height: 80px; |
| } |
| |
| #intervening { |
| background: papayawhip; |
| width: 300px; |
| height: 300px; |
| backface-visibility: hidden; |
| margin: 90px; |
| } |
| </style> |
| <div id="intervening"> |
| <div id="scroller"> |
| <div id="fixed"></div> |
| <div class="scrolled"></div> |
| <div class="scrolled"></div> |
| <div class="scrolled"></div> |
| <div class="scrolled"></div> |
| </div> |
| </div> |
| <script> |
| if (window.internals) { |
| window.internals.runtimeFlags.overlayScrollbarsEnabled = true; |
| window.internals.settings.setPreferCompositingToLCDTextEnabled(true); |
| } |
| |
| if (window.testRunner) |
| window.testRunner.dumpAsTextWithPixelResults(); |
| |
| onload = function() { |
| if (window.internals && window.testRunner) |
| window.testRunner.setCustomTextOutput(window.internals.layerTreeAsText(document)); |
| }; |
| </script> |
