Title: [184626] branches/safari-601.1.32-branch/Source
Revision
184626
Author
[email protected]
Date
2015-05-20 00:58:18 -0700 (Wed, 20 May 2015)

Log Message

Merged r184596.  rdar://problem/21023785

Modified Paths

Diff

Modified: branches/safari-601.1.32-branch/Source/WebCore/ChangeLog (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/ChangeLog	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/ChangeLog	2015-05-20 07:58:18 UTC (rev 184626)
@@ -1,3 +1,58 @@
+2015-05-20  Babak Shafiei  <[email protected]>
+
+        Merge r184596.
+
+    2015-05-19  Brent Fulgham  <[email protected]>
+
+            REGRESSION(142590): Part 2: Scroll-snap points are improperly snapping to earlier index values (Scrolling Thread) 
+            https://bugs.webkit.org/show_bug.cgi?id=145175
+            <rdar://problem/21023785>
+
+            Reviewed by Beth Dakin.
+
+            Extend the main-thread scrolling changes done in Bug 145140 to also handle Scrolling Thread snapping.
+            The post-layout fixup (needed to handle window resize and device orientation changes) should not fire
+            while Scrolling Thread scroll-snap animations are running, since these animations will most likely
+            move the scroll view into the proper position. If we attempt to 'fix up' the scroll position before
+            these animations finish, we get an ugly 'jump' in the display.
+
+            * page/FrameView.cpp:
+            (WebCore::FrameView::isScrollSnapInProgress): New method based on isRubberBandInProgress, which considers
+            both the ScrollAnimator (main thread) scrolling, as well as the ScrollingCoordinator (Scrolling Thread)
+            scrolling operations. Returns true if a scroll-snap animation is still active.
+            * page/FrameView.h:
+            * page/scrolling/AsyncScrollingCoordinator.cpp:
+            (WebCore::AsyncScrollingCoordinator::isScrollSnapInProgress): Added. Returns scrolling tree's
+            'isScrollSnapInProgress' state.
+            * page/scrolling/AsyncScrollingCoordinator.h:
+            * page/scrolling/ScrollingCoordinator.h:
+            (WebCore::ScrollingCoordinator::isScrollSnapInProgress): Added default 'false' stub.
+            * page/scrolling/ScrollingTree.cpp:
+            (WebCore::ScrollingTree::ScrollingTree): Use modern C++11 initializers.
+            (WebCore::ScrollingTree::isScrollSnapInProgress): Added.
+            (WebCore::ScrollingTree::setMainFrameIsScrollSnapping): Added.
+            * page/scrolling/ScrollingTree.h:
+            * page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.h:
+            * page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.mm:
+            (WebCore::ScrollingTreeFrameScrollingNodeMac::handleWheelEvent): Update scrolling tree state to match the
+            ScrollController's scroll-snap state.
+            (WebCore::ScrollingTreeFrameScrollingNodeMac::startScrollSnapTimer): Added. When starting a scroll snap timer,
+            always set the scrolling tree scroll-snapping state to true.
+            (WebCore::ScrollingTreeFrameScrollingNodeMac::stopScrollSnapTimer): Added. When ending a scroll snap timer,
+            only set the scrolling tree scroll-snapping state to false if the other axis animator is inactive.
+            * platform/ScrollableArea.cpp:
+            (WebCore::ScrollableArea::updateScrollSnapState): Revise implementation to use its 'isScrollSnapInProgress'
+            method, rather than only looking at the ScrollAnimator (main thread) state.
+            * platform/ScrollableArea.h:
+            (WebCore::ScrollableArea::isScrollSnapInProgress): Added.
+            * platform/cocoa/ScrollController.h:
+            * platform/cocoa/ScrollController.mm:
+            (WebCore::ScrollController::hasActiveScrollSnapTimerForAxis): Added. Reports if the scroll snap animation
+            timer on the requested axis is running or not.
+            * rendering/RenderLayer.cpp:
+            (WebCore::RenderLayer::isScrollSnapInProgress): Added.
+            * rendering/RenderLayer.h:
+
 2015-05-19  Matthew Hanson  <[email protected]>
 
         Merge r184589. rdar://problem/21009192

Modified: branches/safari-601.1.32-branch/Source/WebCore/page/FrameView.cpp (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/page/FrameView.cpp	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/page/FrameView.cpp	2015-05-20 07:58:18 UTC (rev 184626)
@@ -897,6 +897,28 @@
     
     updateSnapOffsetsForScrollableArea(*this, *body, *renderView(), body->renderer()->style());
 }
+
+bool FrameView::isScrollSnapInProgress() const
+{
+    if (scrollbarsSuppressed())
+        return false;
+    
+    // If the scrolling thread updates the scroll position for this FrameView, then we should return
+    // ScrollingCoordinator::isScrollSnapInProgress().
+    if (Page* page = frame().page()) {
+        if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator()) {
+            if (!scrollingCoordinator->shouldUpdateScrollLayerPositionSynchronously())
+                return scrollingCoordinator->isScrollSnapInProgress();
+        }
+    }
+    
+    // If the main thread updates the scroll position for this FrameView, we should return
+    // ScrollAnimator::isScrollSnapInProgress().
+    if (ScrollAnimator* scrollAnimator = existingScrollAnimator())
+        return scrollAnimator->isScrollSnapInProgress();
+    
+    return false;
+}
 #endif
 
 bool FrameView::flushCompositingStateForThisFrame(Frame* rootFrameForFlush)

Modified: branches/safari-601.1.32-branch/Source/WebCore/page/FrameView.h (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/page/FrameView.h	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/page/FrameView.h	2015-05-20 07:58:18 UTC (rev 184626)
@@ -4,7 +4,7 @@
              (C) 1998, 1999 Torben Weis ([email protected])
              (C) 1999 Lars Knoll ([email protected])
              (C) 1999 Antti Koivisto ([email protected])
-   Copyright (C) 2004-2009, 2014 Apple Inc. All rights reserved.
+   Copyright (C) 2004-2009, 2014-2015 Apple Inc. All rights reserved.
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
@@ -538,7 +538,8 @@
     FloatRect exposedRect() const { return m_exposedRect; }
 
 #if ENABLE(CSS_SCROLL_SNAP)
-    virtual void updateSnapOffsets() override;
+    void updateSnapOffsets() override;
+    bool isScrollSnapInProgress() const override;
 #endif
 
     virtual float adjustScrollStepForFixedContent(float step, ScrollbarOrientation, ScrollGranularity) override;

Modified: branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.cpp (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.cpp	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.cpp	2015-05-20 07:58:18 UTC (rev 184626)
@@ -611,6 +611,13 @@
 }
 #endif
 
+#if ENABLE(CSS_SCROLL_SNAP)
+bool AsyncScrollingCoordinator::isScrollSnapInProgress() const
+{
+    return scrollingTree()->isScrollSnapInProgress();
+}
+#endif
+    
 } // namespace WebCore
 
 #endif // ENABLE(ASYNC_SCROLLING)

Modified: branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.h (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.h	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/AsyncScrollingCoordinator.h	2015-05-20 07:58:18 UTC (rev 184626)
@@ -102,6 +102,10 @@
     virtual bool isRubberBandInProgress() const override;
     virtual void setScrollPinningBehavior(ScrollPinningBehavior) override;
 
+#if ENABLE(CSS_SCROLL_SNAP)
+    bool isScrollSnapInProgress() const override;
+#endif
+
     WEBCORE_EXPORT virtual void syncChildPositions(const LayoutRect& viewportRect) override;
     WEBCORE_EXPORT virtual void scrollableAreaScrollbarLayerDidChange(ScrollableArea&, ScrollbarOrientation) override;
 

Modified: branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/ScrollingCoordinator.h (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/ScrollingCoordinator.h	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/ScrollingCoordinator.h	2015-05-20 07:58:18 UTC (rev 184626)
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011 Apple Inc. All rights reserved.
+ * Copyright (C) 2011, 2015 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -176,6 +176,7 @@
     virtual void syncChildPositions(const LayoutRect&) { }
     virtual String scrollingStateTreeAsText() const;
     virtual bool isRubberBandInProgress() const { return false; }
+    virtual bool isScrollSnapInProgress() const { return false; }
     virtual void setScrollPinningBehavior(ScrollPinningBehavior) { }
 
     // Generated a unique id for scroll layers.

Modified: branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/ScrollingTree.cpp (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/ScrollingTree.cpp	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/ScrollingTree.cpp	2015-05-20 07:58:18 UTC (rev 184626)
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012, 2013, 2014 Apple Inc. All rights reserved.
+ * Copyright (C) 2012-2015 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -39,20 +39,6 @@
 namespace WebCore {
 
 ScrollingTree::ScrollingTree()
-    : m_rubberBandsAtLeft(true)
-    , m_rubberBandsAtRight(true)
-    , m_rubberBandsAtTop(true)
-    , m_rubberBandsAtBottom(true)
-    , m_mainFramePinnedToTheLeft(true)
-    , m_mainFramePinnedToTheRight(true)
-    , m_mainFramePinnedToTheTop(true)
-    , m_mainFramePinnedToTheBottom(true)
-    , m_mainFrameIsRubberBanding(false)
-    , m_scrollPinningBehavior(DoNotPin)
-    , m_latchedNode(0)
-    , m_scrollingPerformanceLoggingEnabled(false)
-    , m_isHandlingProgrammaticScroll(false)
-    , m_fixedOrStickyNodeCount(0)
 {
 }
 
@@ -263,6 +249,20 @@
     m_mainFrameIsRubberBanding = isRubberBanding;
 }
 
+bool ScrollingTree::isScrollSnapInProgress()
+{
+    MutexLocker lock(m_mutex);
+    
+    return m_mainFrameIsScrollSnapping;
+}
+    
+void ScrollingTree::setMainFrameIsScrollSnapping(bool isScrollSnapping)
+{
+    MutexLocker locker(m_mutex);
+    
+    m_mainFrameIsScrollSnapping = isScrollSnapping;
+}
+
 void ScrollingTree::setCanRubberBandState(bool canRubberBandAtLeft, bool canRubberBandAtRight, bool canRubberBandAtTop, bool canRubberBandAtBottom)
 {
     MutexLocker locker(m_swipeStateMutex);

Modified: branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/ScrollingTree.h (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/ScrollingTree.h	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/ScrollingTree.h	2015-05-20 07:58:18 UTC (rev 184626)
@@ -64,6 +64,8 @@
     
     void setMainFrameIsRubberBanding(bool);
     bool isRubberBandInProgress();
+    void setMainFrameIsScrollSnapping(bool);
+    bool isScrollSnapInProgress();
 
     virtual void invalidate() { }
     WEBCORE_EXPORT virtual void commitNewTreeState(std::unique_ptr<ScrollingStateTree>);
@@ -161,24 +163,25 @@
     FloatPoint m_mainFrameScrollPosition;
 
     Mutex m_swipeStateMutex;
-    bool m_rubberBandsAtLeft;
-    bool m_rubberBandsAtRight;
-    bool m_rubberBandsAtTop;
-    bool m_rubberBandsAtBottom;
-    bool m_mainFramePinnedToTheLeft;
-    bool m_mainFramePinnedToTheRight;
-    bool m_mainFramePinnedToTheTop;
-    bool m_mainFramePinnedToTheBottom;
-    bool m_mainFrameIsRubberBanding;
-    ScrollPinningBehavior m_scrollPinningBehavior;
-    ScrollingNodeID m_latchedNode;
+    ScrollPinningBehavior m_scrollPinningBehavior { DoNotPin };
+    ScrollingNodeID m_latchedNode { 0 };
 
-    bool m_scrollingPerformanceLoggingEnabled;
+    unsigned m_fixedOrStickyNodeCount { 0 };
+
+    bool m_rubberBandsAtLeft { true };
+    bool m_rubberBandsAtRight { true };
+    bool m_rubberBandsAtTop { true };
+    bool m_rubberBandsAtBottom { true };
+    bool m_mainFramePinnedToTheLeft { true };
+    bool m_mainFramePinnedToTheRight { true };
+    bool m_mainFramePinnedToTheTop { true };
+    bool m_mainFramePinnedToTheBottom { true };
+    bool m_mainFrameIsRubberBanding { false };
+    bool m_mainFrameIsScrollSnapping { false };
+    bool m_scrollingPerformanceLoggingEnabled { false };
+    bool m_isHandlingProgrammaticScroll { false };
+};
     
-    bool m_isHandlingProgrammaticScroll;
-    unsigned m_fixedOrStickyNodeCount;
-};
-
 } // namespace WebCore
 
 #define SPECIALIZE_TYPE_TRAITS_SCROLLING_TREE(ToValueTypeName, predicate) \

Modified: branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.h (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.h	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.h	2015-05-20 07:58:18 UTC (rev 184626)
@@ -86,6 +86,8 @@
     LayoutUnit scrollOffsetOnAxis(ScrollEventAxis) const override;
     void immediateScrollOnAxis(ScrollEventAxis, float delta) override;
     float pageScaleFactor() const override;
+    void startScrollSnapTimer(ScrollEventAxis) override;
+    void stopScrollSnapTimer(ScrollEventAxis) override;
 #endif
 
     void logExposedUnfilledArea();

Modified: branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.mm (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.mm	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/page/scrolling/mac/ScrollingTreeFrameScrollingNodeMac.mm	2015-05-20 07:58:18 UTC (rev 184626)
@@ -185,6 +185,7 @@
 
     m_scrollController.handleWheelEvent(wheelEvent);
 #if ENABLE(CSS_SCROLL_SNAP)
+    scrollingTree().setMainFrameIsScrollSnapping(m_scrollController.isScrollSnapInProgress());
     if (m_scrollController.activeScrollSnapIndexDidChange())
         scrollingTree().setActiveScrollSnapIndices(scrollingNodeID(), m_scrollController.activeScrollSnapIndexForAxis(ScrollEventAxis::Horizontal), m_scrollController.activeScrollSnapIndexForAxis(ScrollEventAxis::Vertical));
 #endif
@@ -574,6 +575,18 @@
 {
     return frameScaleFactor();
 }
+
+void ScrollingTreeFrameScrollingNodeMac::startScrollSnapTimer(ScrollEventAxis)
+{
+    scrollingTree().setMainFrameIsScrollSnapping(true);
+}
+
+void ScrollingTreeFrameScrollingNodeMac::stopScrollSnapTimer(ScrollEventAxis axis)
+{
+    ScrollEventAxis otherAxis = (axis == ScrollEventAxis::Horizontal) ? ScrollEventAxis::Vertical : ScrollEventAxis::Horizontal;
+    if (!m_scrollController.hasActiveScrollSnapTimerForAxis(otherAxis))
+        scrollingTree().setMainFrameIsScrollSnapping(false);
+}
 #endif
 
 void ScrollingTreeFrameScrollingNodeMac::deferTestsForReason(WheelEventTestTrigger::ScrollableAreaIdentifier identifier, WheelEventTestTrigger::DeferTestTriggerReason reason) const

Modified: branches/safari-601.1.32-branch/Source/WebCore/platform/ScrollableArea.cpp (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/platform/ScrollableArea.cpp	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/platform/ScrollableArea.cpp	2015-05-20 07:58:18 UTC (rev 184626)
@@ -458,13 +458,13 @@
 void ScrollableArea::updateScrollSnapState()
 {
 #if PLATFORM(MAC)
-    if (ScrollAnimator* scrollAnimator = existingScrollAnimator()) {
+    if (ScrollAnimator* scrollAnimator = existingScrollAnimator())
         scrollAnimator->updateScrollAnimatorsAndTimers();
-        if (scrollAnimator->isScrollSnapInProgress())
-            return;
-    }
 #endif
 
+    if (isScrollSnapInProgress())
+        return;
+
     IntPoint currentPosition = scrollPosition();
     IntPoint correctedPosition = nearestActiveSnapPoint(currentPosition);
     

Modified: branches/safari-601.1.32-branch/Source/WebCore/platform/ScrollableArea.h (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/platform/ScrollableArea.h	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/platform/ScrollableArea.h	2015-05-20 07:58:18 UTC (rev 184626)
@@ -230,6 +230,7 @@
     virtual IntRect scrollableAreaBoundingBox() const = 0;
 
     virtual bool isRubberBandInProgress() const { return false; }
+    virtual bool isScrollSnapInProgress() const { return false; }
 
     virtual bool scrollAnimatorEnabled() const { return false; }
 

Modified: branches/safari-601.1.32-branch/Source/WebCore/platform/cocoa/ScrollController.h (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/platform/cocoa/ScrollController.h	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/platform/cocoa/ScrollController.h	2015-05-20 07:58:18 UTC (rev 184626)
@@ -124,6 +124,7 @@
     void setActiveScrollSnapIndexForAxis(ScrollEventAxis, unsigned);
     bool activeScrollSnapIndexDidChange() const { return m_activeScrollSnapIndexDidChange; }
     void setScrollSnapIndexDidChange(bool state) { m_activeScrollSnapIndexDidChange = state; }
+    bool hasActiveScrollSnapTimerForAxis(ScrollEventAxis) const;
 #endif
 
 private:

Modified: branches/safari-601.1.32-branch/Source/WebCore/platform/cocoa/ScrollController.mm (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/platform/cocoa/ScrollController.mm	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/platform/cocoa/ScrollController.mm	2015-05-20 07:58:18 UTC (rev 184626)
@@ -477,6 +477,11 @@
     return (axis == ScrollEventAxis::Horizontal) ? *m_horizontalScrollSnapState : *m_verticalScrollSnapState;
 }
 
+bool ScrollController::hasActiveScrollSnapTimerForAxis(ScrollEventAxis axis) const
+{
+    return (axis == ScrollEventAxis::Horizontal) ? m_horizontalScrollSnapTimer.isActive() : m_verticalScrollSnapTimer.isActive();
+}
+
 static inline WheelEventStatus toWheelEventStatus(PlatformWheelEventPhase phase, PlatformWheelEventPhase momentumPhase)
 {
     if (phase == PlatformWheelEventPhaseNone) {

Modified: branches/safari-601.1.32-branch/Source/WebCore/rendering/RenderLayer.cpp (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/rendering/RenderLayer.cpp	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/rendering/RenderLayer.cpp	2015-05-20 07:58:18 UTC (rev 184626)
@@ -3204,6 +3204,17 @@
     RenderBox* box = enclosingElement()->renderBox();
     updateSnapOffsetsForScrollableArea(*this, *downcast<HTMLElement>(enclosingElement()), *box, box->style());
 }
+
+bool RenderLayer::isScrollSnapInProgress() const
+{
+    if (!scrollsOverflow())
+        return false;
+    
+    if (ScrollAnimator* scrollAnimator = existingScrollAnimator())
+        return scrollAnimator->isScrollSnapInProgress();
+    
+    return false;
+}
 #endif
 
 int RenderLayer::verticalScrollbarWidth(OverlayScrollbarSizeRelevancy relevancy) const

Modified: branches/safari-601.1.32-branch/Source/WebCore/rendering/RenderLayer.h (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebCore/rendering/RenderLayer.h	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebCore/rendering/RenderLayer.h	2015-05-20 07:58:18 UTC (rev 184626)
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
+ * Copyright (C) 2003, 2009, 2012, 2015 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
@@ -877,6 +877,9 @@
     virtual bool isRubberBandInProgress() const override;
     virtual bool updatesScrollLayerPositionOnMainThread() const override { return true; }
     virtual bool forceUpdateScrollbarsOnMainThreadForPerformanceTesting() const override;
+#if ENABLE(CSS_SCROLL_SNAP)
+    bool isScrollSnapInProgress() const override;
+#endif
 
 #if PLATFORM(IOS)
     void registerAsTouchEventListenerForScrolling();

Modified: branches/safari-601.1.32-branch/Source/WebKit2/ChangeLog (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebKit2/ChangeLog	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebKit2/ChangeLog	2015-05-20 07:58:18 UTC (rev 184626)
@@ -1,3 +1,21 @@
+2015-05-20  Babak Shafiei  <[email protected]>
+
+        Merge r184596.
+
+    2015-05-19  Brent Fulgham  <[email protected]>
+
+            REGRESSION(142590): Part 2: Scroll-snap points are improperly snapping to earlier index values (Scrolling Thread) 
+            https://bugs.webkit.org/show_bug.cgi?id=145175
+            <rdar://problem/21023785>
+
+            Reviewed by Beth Dakin.
+
+            Add a stub implementation of isScrollSnapInProgress to match ScrollingCoordinator signature.
+
+            * WebProcess/Scrolling/RemoteScrollingCoordinator.h:
+            * WebProcess/Scrolling/RemoteScrollingCoordinator.mm:
+            (WebKit::RemoteScrollingCoordinator::isScrollSnapInProgress): Added stub.
+
 2015-05-18  Matthew Hanson  <[email protected]>
 
         Merge custom patch. rdar://problem/20950052

Modified: branches/safari-601.1.32-branch/Source/WebKit2/WebProcess/Scrolling/RemoteScrollingCoordinator.h (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebKit2/WebProcess/Scrolling/RemoteScrollingCoordinator.h	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebKit2/WebProcess/Scrolling/RemoteScrollingCoordinator.h	2015-05-20 07:58:18 UTC (rev 184626)
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Apple Inc. All rights reserved.
+ * Copyright (C) 2014-2015 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -66,6 +66,7 @@
 
     virtual bool isRubberBandInProgress() const override;
     virtual void setScrollPinningBehavior(WebCore::ScrollPinningBehavior) override;
+    bool isScrollSnapInProgress() const override;
 
     // IPC::MessageReceiver
     virtual void didReceiveMessage(IPC::Connection&, IPC::MessageDecoder&) override;

Modified: branches/safari-601.1.32-branch/Source/WebKit2/WebProcess/Scrolling/RemoteScrollingCoordinator.mm (184625 => 184626)


--- branches/safari-601.1.32-branch/Source/WebKit2/WebProcess/Scrolling/RemoteScrollingCoordinator.mm	2015-05-20 07:56:54 UTC (rev 184625)
+++ branches/safari-601.1.32-branch/Source/WebKit2/WebProcess/Scrolling/RemoteScrollingCoordinator.mm	2015-05-20 07:58:18 UTC (rev 184626)
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2014 Apple Inc. All rights reserved.
+ * Copyright (C) 2014-2015 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -79,6 +79,12 @@
     return false;
 }
 
+bool RemoteScrollingCoordinator::isScrollSnapInProgress() const
+{
+    // FIXME: need to maintain state in the web process?
+    return false;
+}
+
 void RemoteScrollingCoordinator::setScrollPinningBehavior(ScrollPinningBehavior)
 {
     // FIXME: send to the UI process.
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