| <!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] --> |
| <html> |
| <head> |
| <title>Scrolling tree should show slow-repaint reasons on the overflow and root nodes</title> |
| <style> |
| .scroller { |
| background-color: silver; |
| border: 1px solid black; |
| padding: 10px; |
| width: 400px; |
| height: 300px; |
| overflow: scroll; |
| } |
| |
| .scrolling-content { |
| height: 1000px; |
| } |
| |
| .fixed-background { |
| margin-top: 100px; |
| width: 400px; |
| height: 300px; |
| background-image: linear-gradient(green, blue); |
| } |
| |
| .adding .fixed-background { |
| background-attachment: scroll; |
| } |
| |
| .removing .fixed-background { |
| background-attachment: fixed; |
| } |
| |
| body.toggled .adding .fixed-background { |
| background-attachment: fixed; |
| } |
| |
| body.toggled .removing .fixed-background { |
| background-attachment: scroll; |
| } |
| |
| body.none .fixed-background { |
| background-attachment: scroll; |
| } |
| </style> |
| <script src="../../../resources/ui-helper.js"></script> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| async function doTest() |
| { |
| let output = ''; |
| UIHelper.delayFor(0); |
| |
| output += 'Before toggle:\n'; |
| if (window.internals) |
| output += window.internals.scrollingStateTreeAsText() + '\n'; |
| |
| document.body.classList.add('toggled'); |
| output += '\nAfter toggle:\n'; |
| if (window.internals) |
| output += window.internals.scrollingStateTreeAsText() + '\n'; |
| |
| document.body.classList.replace('toggled', 'none'); |
| output += '\nAfter removal:\n'; |
| if (window.internals) |
| output += window.internals.scrollingStateTreeAsText() + '\n'; |
| |
| document.getElementById('scrollingTree').innerText = output; |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| } |
| |
| window.addEventListener('load', doTest, false); |
| </script> |
| </head> |
| <body> |
| <div class="scroller adding"> |
| <div class="scrolling-content"> |
| Scrolling content |
| <div class="fixed-background"> |
| Fixed background |
| </div> |
| </div> |
| </div> |
| |
| <div class="scroller removing"> |
| <div class="scrolling-content"> |
| Scrolling content |
| <div class="fixed-background"> |
| Fixed background |
| </div> |
| </div> |
| </div> |
| |
| <pre id="scrollingTree"></pre> |
| </body> |
| </html> |
