| Index: third_party/WebKit/LayoutTests/virtual/threaded/fast/scroll-behavior/smooth-scroll/main-thread-scrolling-reason-correctness.html
|
| diff --git a/third_party/WebKit/LayoutTests/virtual/threaded/fast/scroll-behavior/smooth-scroll/main-thread-scrolling-reason-correctness.html b/third_party/WebKit/LayoutTests/virtual/threaded/fast/scroll-behavior/smooth-scroll/main-thread-scrolling-reason-correctness.html
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..2c785326444dda114f2a25f332cabb728b0386c1
|
| --- /dev/null
|
| +++ b/third_party/WebKit/LayoutTests/virtual/threaded/fast/scroll-behavior/smooth-scroll/main-thread-scrolling-reason-correctness.html
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| @@ -0,0 +1,81 @@
|
| +<!DOCTYPE html>
|
| +<script src="../../../../../resources/js-test.js"></script>
|
| +<style>
|
| +body {
|
| + width: 2000px;
|
| + height: 2000px;
|
| +}
|
| +</style>
|
| +
|
| +<script>
|
| +var jsTestIsAsync = true;
|
| +
|
| +description("This test verifies that the ScrollAnimator can schedule " +
|
| + "animations on the compositor when it adds a temporary main thread " +
|
| + "scrolling reason.");
|
| +
|
| +// From ScrollingCoordinator::mainThreadScrollingReasonsAsText.
|
| +var ANIMATING_TEXT = 'Animating scroll on main thread';
|
| +// From ScrollAnimatorCompositorCoordinator::RunState.
|
| +var RUNNING_ON_COMPOSITOR = 2;
|
| +var RUNNING_ON_COMPOSITOR_BUT_NEEDS_UPDATE = 3;
|
| +
|
| +function finishTest() {
|
| + requestAnimationFrame(function() {
|
| + // Check that main thread scrolling reason is removed.
|
| + shouldBeTrue("internals.mainThreadScrollingReasons(document) == ''");
|
| + finishJSTest();
|
| + });
|
| +}
|
| +
|
| +function needsUpdateOrRunningOnCompositor(node) {
|
| + var state = internals.getScrollAnimationState(node);
|
| + return state == RUNNING_ON_COMPOSITOR ||
|
| + state == RUNNING_ON_COMPOSITOR_BUT_NEEDS_UPDATE;
|
| +}
|
| +
|
| +function runTest() {
|
| + if (document.scrollingElement.scrollTop == 0) {
|
| + requestAnimationFrame(runTest);
|
| + } else {
|
| + // Check that initiated by main thread and running on the compositor.
|
| + shouldBeTrue("internals.getScrollAnimationState(document) " +
|
| + "== RUNNING_ON_COMPOSITOR");
|
| + // Check that main thread scrolling reason is added.
|
| + shouldBeTrue("internals.mainThreadScrollingReasons(document) " +
|
| + "== ANIMATING_TEXT");
|
| +
|
| + // Scroll 1 more tick down.
|
| + eventSender.mouseScrollBy(0, -1);
|
| + shouldBeTrue("internals.getScrollAnimationState(document) " +
|
| + "== RUNNING_ON_COMPOSITOR_BUT_NEEDS_UPDATE");
|
| +
|
| + requestAnimationFrame(function() {
|
| + // Check that the temporary main thread scrolling is still there
|
| + // and running on the compositor.
|
| + shouldBeTrue("internals.mainThreadScrollingReasons(document) " +
|
| + "== ANIMATING_TEXT");
|
| + shouldBeTrue("needsUpdateOrRunningOnCompositor(document)");
|
| + shouldBecomeEqual("document.scrollingElement.scrollTop == 80",
|
| + "true", finishTest);
|
| + });
|
| + }
|
| +}
|
| +
|
| +onload = function() {
|
| + if (!window.eventSender || !window.internals) {
|
| + debug("This test requires window.eventSender.")
|
| + finishJSTest();
|
| + return;
|
| + }
|
| + internals.settings.setScrollAnimatorEnabled(true);
|
| +
|
| + document.scrollingElement.scrollTop = 0;
|
| +
|
| + // Scroll 1 ticks down.
|
| + eventSender.mouseMoveTo(20, 20);
|
| + eventSender.mouseScrollBy(0, -1);
|
| + runTest();
|
| +};
|
| +
|
| +</script>
|
|
|
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