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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 the ScrollAnimator can schedule " + |
| 14 "animations on the compositor when it adds a temporary main thread " + |
| 15 "scrolling reason."); |
| 16 |
| 17 // From ScrollingCoordinator::mainThreadScrollingReasonsAsText. |
| 18 var ANIMATING_TEXT = 'Animating scroll on main thread'; |
| 19 // From ScrollAnimatorCompositorCoordinator::RunState. |
| 20 var RUNNING_ON_COMPOSITOR = 2; |
| 21 var RUNNING_ON_COMPOSITOR_BUT_NEEDS_UPDATE = 3; |
| 22 |
| 23 function finishTest() { |
| 24 requestAnimationFrame(function() { |
| 25 // Check that main thread scrolling reason is removed. |
| 26 shouldBeTrue("internals.mainThreadScrollingReasons(document) == ''"); |
| 27 finishJSTest(); |
| 28 }); |
| 29 } |
| 30 |
| 31 function needsUpdateOrRunningOnCompositor(node) { |
| 32 var state = internals.getScrollAnimationState(node); |
| 33 return state == RUNNING_ON_COMPOSITOR || |
| 34 state == RUNNING_ON_COMPOSITOR_BUT_NEEDS_UPDATE; |
| 35 } |
| 36 |
| 37 function runTest() { |
| 38 if (document.scrollingElement.scrollTop == 0) { |
| 39 requestAnimationFrame(runTest); |
| 40 } else { |
| 41 // Check that initiated by main thread and running on the compositor. |
| 42 shouldBeTrue("internals.getScrollAnimationState(document) " + |
| 43 "== RUNNING_ON_COMPOSITOR"); |
| 44 // Check that main thread scrolling reason is added. |
| 45 shouldBeTrue("internals.mainThreadScrollingReasons(document) " + |
| 46 "== ANIMATING_TEXT"); |
| 47 |
| 48 // Scroll 1 more tick down. |
| 49 eventSender.mouseScrollBy(0, -1); |
| 50 shouldBeTrue("internals.getScrollAnimationState(document) " + |
| 51 "== RUNNING_ON_COMPOSITOR_BUT_NEEDS_UPDATE"); |
| 52 |
| 53 requestAnimationFrame(function() { |
| 54 // Check that the temporary main thread scrolling is still there |
| 55 // and running on the compositor. |
| 56 shouldBeTrue("internals.mainThreadScrollingReasons(document) " + |
| 57 "== ANIMATING_TEXT"); |
| 58 shouldBeTrue("needsUpdateOrRunningOnCompositor(document)"); |
| 59 shouldBecomeEqual("document.scrollingElement.scrollTop == 80", |
| 60 "true", finishTest); |
| 61 }); |
| 62 } |
| 63 } |
| 64 |
| 65 onload = function() { |
| 66 if (!window.eventSender || !window.internals) { |
| 67 debug("This test requires window.eventSender.") |
| 68 finishJSTest(); |
| 69 return; |
| 70 } |
| 71 internals.settings.setScrollAnimatorEnabled(true); |
| 72 |
| 73 document.scrollingElement.scrollTop = 0; |
| 74 |
| 75 // Scroll 1 ticks down. |
| 76 eventSender.mouseMoveTo(20, 20); |
| 77 eventSender.mouseScrollBy(0, -1); |
| 78 runTest(); |
| 79 }; |
| 80 |
| 81 </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