| <!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] --> |
| <html> |
| <head> |
| <title>Check that compositing traverses deeply enough to re-parent scrolling tree nodes</title> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| function doTest() { |
| requestAnimationFrame(() => { |
| document.getElementById('main').classList.add('changed'); |
| if (window.internals) |
| document.getElementById('scrollingTree').innerText = window.internals.scrollingStateTreeAsText() + "\n"; |
| |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }); |
| } |
| |
| window.addEventListener('load', doTest, false); |
| </script> |
| <style> |
| .scroller { |
| position: relative; |
| z-index: 0; /* We want z-order nesting */ |
| background-color: silver; |
| border: 1px solid black; |
| padding: 20px; |
| margin: 20px; |
| width: 400px; |
| height: 300px; |
| overflow: scroll; |
| } |
| |
| #main { |
| height: 500px; |
| } |
| |
| #main.changed { |
| /* Make it not a RenderLayer */ |
| position: static; |
| overflow: visible; |
| } |
| |
| .scrolling-content { |
| height: 1000px; |
| } |
| |
| .intermediate { |
| position: relative; |
| z-index: 0; |
| } |
| |
| .composited { |
| transform: translateZ(1px); |
| background-color: orange; |
| } |
| </style> |
| </head> |
| <body> |
| <div class="scroller" id="main"> |
| <div class="scrolling-content"> |
| Scrolling content |
| <div class="intermediate composited"> |
| Intermediate |
| <div class="inner scroller"> |
| <div class="scrolling-content"> |
| Inner scrolling content |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <pre id="scrollingTree"></pre> |
| </body> |
| </html> |
