| <!DOCTYPE html> <!-- webkit-test-runner [ useFlexibleViewport=true AsyncOverflowScrollingEnabled=true AsyncFrameScrollingEnabled=true ] --> |
| <html> |
| <head> |
| <title>Dragging a view should not snap back when the scroll event triggers a relayout</title> |
| <style type="text/css"> |
| html { |
| scroll-snap-type: both mandatory |
| } |
| |
| html, body { |
| margin: 0; |
| height: 100%; |
| width: 100%; |
| } |
| |
| .horizontal-drawer { |
| width: 500%; |
| height: 100%; |
| } |
| |
| .block { |
| float: left; |
| height: 100%; |
| width: 20%; |
| scroll-snap-align: start; |
| } |
| |
| #console, #output { |
| position: fixed; |
| top: 0px; |
| left: 0px; |
| } |
| </style> |
| <script src="../../../resources/js-test.js"></script> |
| <script src="../../../resources/ui-helper.js"></script> |
| <script> |
| window.jsTestIsAsync = true; |
| |
| async function onLoad() |
| { |
| let sawZero = false; |
| window.addEventListener('scroll', () => { |
| document.getElementById('output').innerText = document.scrollingElement.scrollLeft; |
| sawZero ||= document.scrollingElement.scrollLeft == 0; |
| }) |
| |
| if (window.eventSender == undefined) { |
| document.getElementById('console').innerText = "A scroll drag should not snap until user interaction is finished."; |
| return; |
| } |
| |
| try { |
| await UIHelper.dragFromPointToPoint(150, 150, 50, 150, 0.1); |
| await UIHelper.waitForTargetScrollAnimationToSettle(document.scrollingElement); |
| expectTrue(document.scrollingElement.scrollLeft == window.innerWidth, "horizontal drag snapped to next snap point"); |
| expectTrue(sawZero === false, "relayouts should not caused the scroll area to snap back"); |
| } catch (e) { |
| console.log(e); |
| } finally { |
| finishJSTest(); |
| } |
| } |
| </script> |
| </head> |
| <body onload="onLoad();"> |
| <div class="horizontal-drawer"> |
| <div class="block" style="background: #80475E"></div> |
| <div class="block" style="background: #CC5A71"></div> |
| <div class="block" style="background: #80475E"></div> |
| </div> |
| <p id="console"></p> |
| <p id="output"></p> |
| </body> |
| </html> |
