| <!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] --> |
| <html> |
| <head> |
| <title>Tests that with nested scrollers, we trigger geometry updates on relative layers within the correct ancestor to get backing store attachment right.</title> |
| <style> |
| main { |
| display: flex; |
| position: absolute; |
| width: 700px; |
| height: 500px; |
| border: 1px solid black; |
| } |
| |
| .left { |
| flex-basis: 20%; |
| flex-grow: 0; |
| min-width: 16rem; |
| } |
| |
| .main { |
| flex-grow: 1; |
| flex-shrink: 1; |
| min-width: 20rem; |
| } |
| |
| .panel { |
| display: flex; |
| flex-direction: column; |
| flex-shrink: 0; |
| overflow: hidden; |
| } |
| |
| .scroller { |
| overflow: scroll; |
| } |
| |
| .article-content { |
| margin: 0 auto; |
| max-width: 60rem; |
| overflow: hidden; |
| } |
| |
| .content { |
| position: relative; |
| background-color: silver; |
| height: 1000px; |
| } |
| |
| .relative-box { |
| position: relative; |
| height: 200px; |
| margin: 300px 10px; |
| background-color: silver; |
| border: 1px solid gray; |
| } |
| </style> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| window.addEventListener('load', () => { |
| setTimeout(() => { |
| let scroller = document.getElementById('target'); |
| scroller.scrollTo(0, 1000); |
| if (window.internals) |
| document.getElementById('layers').innerText = window.internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_CLIPPING + internals.LAYER_TREE_INCLUDES_BACKING_STORE_ATTACHED); |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }, 0); |
| }, false); |
| </script> |
| </head> |
| <body> |
| <main> |
| <nav class="left panel"> |
| <div class="scroller"> |
| <div class="content"> |
| </div> |
| </div> |
| </nav> |
| <article class="main panel"> |
| <div id="target" class="scroller"> |
| <div class="article-content"> |
| <div class="relative-box"> |
| </div> |
| <div class="relative-box"> |
| </div> |
| <div class="relative-box"> |
| </div> |
| <div class="relative-box"> |
| </div> |
| <div class="relative-box"> |
| </div> |
| </div> |
| </div> |
| </article> |
| </main> |
| <pre id="layers"></pre> |
| </body> |
| </html> |
| |
