third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.cpp - Issue 1850703002: Revert "Adapt and reland old position sticky implementation from https://codereview.chromium.org/34…

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Unified Diff: third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.cpp

Issue 1850703002: Revert "Adapt and reland old position sticky implementation from https://codereview.chromium.org/34… (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Created 4 years, 9 months ago

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Index: third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.cpp

diff --git a/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.cpp b/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.cpp

index c380c484c06e9fdcc71712a7b9147b19a73c3b34..ec810c2c7f00da3660424e507362925b6e61d90b 100644

--- a/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.cpp

+++ b/third_party/WebKit/Source/core/page/scrolling/ScrollingCoordinator.cpp

@@ -936,8 +936,7 @@ bool ScrollingCoordinator::hasVisibleSlowRepaintViewportConstrainedObjects(Frame

for (const LayoutObject* layoutObject : *viewportConstrainedObjects) {

ASSERT(layoutObject->isBoxModelObject() && layoutObject->hasLayer());

- ASSERT(layoutObject->style()->position() == FixedPosition

- || layoutObject->style()->position() == StickyPosition);

+ ASSERT(layoutObject->style()->position() == FixedPosition);

PaintLayer* layer = toLayoutBoxModelObject(layoutObject)->layer();

// Whether the Layer scrolls with the viewport is a tree-depenent

@@ -986,8 +985,6 @@ MainThreadScrollingReasons ScrollingCoordinator::mainThreadScrollingReasons() co

if (frameView->hasBackgroundAttachmentFixedObjects())

reasons |= MainThreadScrollingReason::kHasBackgroundAttachmentFixedObjects;

- if (frameView->hasStickyPositionObjects())

- reasons |= MainThreadScrollingReason::kHasStickyPositionObjects;

FrameView::ScrollingReasons scrollingReasons = frameView->getScrollingReasons();

const bool mayBeScrolledByInput = (scrollingReasons == FrameView::Scrollable);

const bool mayBeScrolledByScript = mayBeScrolledByInput || (scrollingReasons ==

@@ -1013,8 +1010,6 @@ String ScrollingCoordinator::mainThreadScrollingReasonsAsText(MainThreadScrollin

stringBuilder.appendLiteral("Has background-attachment:fixed, ");

if (reasons & MainThreadScrollingReason::kHasNonLayerViewportConstrainedObjects)

stringBuilder.appendLiteral("Has non-layer viewport-constrained objects, ");

- if (reasons & MainThreadScrollingReason::kHasStickyPositionObjects)

- stringBuilder.appendLiteral("Has sticky position objects, ");

if (reasons & MainThreadScrollingReason::kThreadedScrollingDisabled)

stringBuilder.appendLiteral("Threaded scrolling is disabled, ");

if (reasons & MainThreadScrollingReason::kAnimatingScrollOnMainThread)