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| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <script src="../../../../../resources/js-test.js"></script> |
| 3 <style> |
| 4 body { |
| 5 width: 2000px; |
| 6 height: 2000px; |
| 7 } |
| 8 </style> |
| 9 |
| 10 <script> |
| 11 var jsTestIsAsync = true; |
| 12 |
| 13 description("This test verifies that smooth scrolls initiated on the main " + |
| 14 "thread add the appropriate main thread scrolling reason."); |
| 15 |
| 16 // From ScrollingCoordinator::mainThreadScrollingReasonsAsText. |
| 17 var ANIMATING_TEXT = 'Animating scroll on main thread'; |
| 18 var RUNNING_ON_COMPOSITOR = 2; |
| 19 |
| 20 function finishTest() { |
| 21 requestAnimationFrame(function() { |
| 22 // Check that main thread scrolling reason is removed. |
| 23 shouldBeTrue("internals.mainThreadScrollingReasons(document) == ''"); |
| 24 finishJSTest(); |
| 25 }); |
| 26 } |
| 27 |
| 28 function runTest() { |
| 29 if (document.scrollingElement.scrollTop == 0) { |
| 30 requestAnimationFrame(runTest); |
| 31 } else { |
| 32 // Check that initiated by main thread and running on the compositor. |
| 33 shouldBeTrue("internals.getScrollAnimationState(document) " + |
| 34 "== RUNNING_ON_COMPOSITOR"); |
| 35 // Check that main thread scrolling reason is added. |
| 36 shouldBeTrue("internals.mainThreadScrollingReasons(document) " + |
| 37 "== ANIMATING_TEXT"); |
| 38 shouldBecomeEqual("document.scrollingElement.scrollTop == 40", |
| 39 "true", finishTest); |
| 40 } |
| 41 } |
| 42 |
| 43 onload = function() { |
| 44 if (!window.eventSender || !window.internals) { |
| 45 debug("This test requires window.eventSender.") |
| 46 finishJSTest(); |
| 47 return; |
| 48 } |
| 49 internals.settings.setScrollAnimatorEnabled(true); |
| 50 |
| 51 document.scrollingElement.scrollTop = 0; |
| 52 |
| 53 // Scroll 1 ticks down. |
| 54 eventSender.mouseMoveTo(20, 20); |
| 55 eventSender.mouseScrollBy(0, -1); |
| 56 runTest(); |
| 57 }; |
| 58 |
| 59 </script> |
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Chromium Code Reviews
Issue 1648293003:
Fix smooth scroll jump when switching scroll handling between MT and CC (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master