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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/178661">178661</a></dd>
<dt>Author</dt> <dd>bfulgham@apple.com</dd>
<dt>Date</dt> <dd>2015-01-19 12:02:01 -0800 (Mon, 19 Jan 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>Layers need to be already updated before we call adjustViewSize
https://bugs.webkit.org/show_bug.cgi?id=135514
Reviewed by Simon Fraser.
Tested by 'fast/dynamic/layer-no-longer-paginated.html'
Defer painting operations until we have finished layout. This
has a couple of benefits:
(1) We do not attempt to modify render layers during layout.
(2) In WK1 we do not attempt to paint during layout.
Add a new virtual predicate to ScrollView indicating when we are in
layout so that calls to setContentsSize do not attempt
to adjust scrollbars.
Modify FrameView to set its ScrollView state to block paint
operations during layout. Also add a post-layout handler to
complete the scrollbar updates after layout is finished.
* WebCore.exp.in: Move linker symbol to ScrollView (from FrameView).
* page/FrameView.cpp:
(WebCore::FrameView::layout):
(WebCore::FrameView::shouldDeferScrollUpdateAfterContentSizeChange): Added.
(WebCore::FrameView::scrollPositionChangedViaPlatformWidget): Removed (Renamed).
(WebCore::FrameView::scrollPositionChangedViaPlatformWidgetImpl): Added (Renamed)
(WebCore::FrameView::paintContents): Do not paint if we are inside view size adjustment.
* page/FrameView.h:
* platform/ScrollView.cpp:
(WebCore::ScrollView::scrollPositionChangedViaPlatformWidget): Added. Checks whether we need to defer
painting, and calls virtual scrollPositionChangedViaPlatformWidgetImpl if we do not.
(WebCore::FrameView::scrollPositionChangedViaPlatformWidgetImpl): Added.
(WebCore::ScrollView::handleDeferredScrollUpdateAfterContentSizeChange): Added.
(WebCore::ScrollView::scrollTo): If we should defer painting, cache the
the scroll delta and apply it after the layout is complete.
(WebCore::ScrollView::completeUpdatesAfterScrollTo): Split off part of 'scrollTo' into its own method
so we can reuse it in handleDeferredScrollUpdateAfterContentSizeChange.
* platform/ScrollView.h:
(WebCore::ScrollView::shouldDeferScrollUpdateAfterContentSizeChange): Added.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreWebCoreexpin">trunk/Source/WebCore/WebCore.exp.in</a></li>
<li><a href="#trunkSourceWebCorepageFrameViewcpp">trunk/Source/WebCore/page/FrameView.cpp</a></li>
<li><a href="#trunkSourceWebCorepageFrameViewh">trunk/Source/WebCore/page/FrameView.h</a></li>
<li><a href="#trunkSourceWebCoreplatformScrollViewcpp">trunk/Source/WebCore/platform/ScrollView.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformScrollViewh">trunk/Source/WebCore/platform/ScrollView.h</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (178660 => 178661)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2015-01-19 19:45:24 UTC (rev 178660)
+++ trunk/Source/WebCore/ChangeLog 2015-01-19 20:02:01 UTC (rev 178661)
</span><span class="lines">@@ -1,3 +1,45 @@
</span><ins>+2015-01-19 Brent Fulgham <bfulgham@apple.com>
+
+ Layers need to be already updated before we call adjustViewSize
+ https://bugs.webkit.org/show_bug.cgi?id=135514
+
+ Reviewed by Simon Fraser.
+
+ Tested by 'fast/dynamic/layer-no-longer-paginated.html'
+
+ Defer painting operations until we have finished layout. This
+ has a couple of benefits:
+ (1) We do not attempt to modify render layers during layout.
+ (2) In WK1 we do not attempt to paint during layout.
+
+ Add a new virtual predicate to ScrollView indicating when we are in
+ layout so that calls to setContentsSize do not attempt
+ to adjust scrollbars.
+
+ Modify FrameView to set its ScrollView state to block paint
+ operations during layout. Also add a post-layout handler to
+ complete the scrollbar updates after layout is finished.
+
+ * WebCore.exp.in: Move linker symbol to ScrollView (from FrameView).
+ * page/FrameView.cpp:
+ (WebCore::FrameView::layout):
+ (WebCore::FrameView::shouldDeferScrollUpdateAfterContentSizeChange): Added.
+ (WebCore::FrameView::scrollPositionChangedViaPlatformWidget): Removed (Renamed).
+ (WebCore::FrameView::scrollPositionChangedViaPlatformWidgetImpl): Added (Renamed)
+ (WebCore::FrameView::paintContents): Do not paint if we are inside view size adjustment.
+ * page/FrameView.h:
+ * platform/ScrollView.cpp:
+ (WebCore::ScrollView::scrollPositionChangedViaPlatformWidget): Added. Checks whether we need to defer
+ painting, and calls virtual scrollPositionChangedViaPlatformWidgetImpl if we do not.
+ (WebCore::FrameView::scrollPositionChangedViaPlatformWidgetImpl): Added.
+ (WebCore::ScrollView::handleDeferredScrollUpdateAfterContentSizeChange): Added.
+ (WebCore::ScrollView::scrollTo): If we should defer painting, cache the
+ the scroll delta and apply it after the layout is complete.
+ (WebCore::ScrollView::completeUpdatesAfterScrollTo): Split off part of 'scrollTo' into its own method
+ so we can reuse it in handleDeferredScrollUpdateAfterContentSizeChange.
+ * platform/ScrollView.h:
+ (WebCore::ScrollView::shouldDeferScrollUpdateAfterContentSizeChange): Added.
+
</ins><span class="cx"> 2015-01-16 Ada Chan <adachan@apple.com>
</span><span class="cx">
</span><span class="cx"> HTMLMediaElement::isPlayingAudio() should return false if the element is explicitly muted by script.
</span></span></pre></div>
<a id="trunkSourceWebCoreWebCoreexpin"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/WebCore.exp.in (178660 => 178661)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/WebCore.exp.in 2015-01-19 19:45:24 UTC (rev 178660)
+++ trunk/Source/WebCore/WebCore.exp.in 2015-01-19 20:02:01 UTC (rev 178661)
</span><span class="lines">@@ -95,6 +95,7 @@
</span><span class="cx"> __ZN7WebCore10ScrollView23setPaintsEntireContentsEb
</span><span class="cx"> __ZN7WebCore10ScrollView23setScrollbarsSuppressedEbb
</span><span class="cx"> __ZN7WebCore10ScrollView24windowResizerRectChangedEv
</span><ins>+__ZN7WebCore10ScrollView38scrollPositionChangedViaPlatformWidgetERKNS_8IntPointES3_
</ins><span class="cx"> __ZN7WebCore10ScrollView4hideEv
</span><span class="cx"> __ZN7WebCore10ScrollView4showEv
</span><span class="cx"> __ZN7WebCore10ScrollView5paintEPNS_15GraphicsContextERKNS_7IntRectE
</span><span class="lines">@@ -1491,7 +1492,6 @@
</span><span class="cx"> __ZN7WebCore9FrameView34setViewportSizeForCSSViewportUnitsENS_7IntSizeE
</span><span class="cx"> __ZN7WebCore9FrameView37setScrollingPerformanceLoggingEnabledEb
</span><span class="cx"> __ZN7WebCore9FrameView37updateLayoutAndStyleIfNeededRecursiveEv
</span><del>-__ZN7WebCore9FrameView38scrollPositionChangedViaPlatformWidgetERKNS_8IntPointES3_
</del><span class="cx"> __ZN7WebCore9FrameView39flushCompositingStateIncludingSubframesEv
</span><span class="cx"> __ZN7WebCore9FrameView52disableLayerFlushThrottlingTemporarilyForInteractionEv
</span><span class="cx"> __ZN7WebCore9FrameView6createERNS_5FrameE
</span></span></pre></div>
<a id="trunkSourceWebCorepageFrameViewcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/FrameView.cpp (178660 => 178661)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/FrameView.cpp 2015-01-19 19:45:24 UTC (rev 178660)
+++ trunk/Source/WebCore/page/FrameView.cpp 2015-01-19 20:02:01 UTC (rev 178661)
</span><span class="lines">@@ -1161,7 +1161,7 @@
</span><span class="cx">
</span><span class="cx"> if (!allowSubtree && m_layoutRoot) {
</span><span class="cx"> m_layoutRoot->markContainingBlocksForLayout(false);
</span><del>- m_layoutRoot = 0;
</del><ins>+ m_layoutRoot = nullptr;
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> ASSERT(frame().view() == this);
</span><span class="lines">@@ -1358,7 +1358,9 @@
</span><span class="cx"> layer->updateLayerPositionsAfterLayout(renderView()->layer(), updateLayerPositionFlags(layer, subtree, m_needsFullRepaint));
</span><span class="cx">
</span><span class="cx"> updateCompositingLayersAfterLayout();
</span><del>-
</del><ins>+
+ m_layoutPhase = InPostLayerPositionsUpdatedAfterLayout;
+
</ins><span class="cx"> m_layoutCount++;
</span><span class="cx">
</span><span class="cx"> #if PLATFORM(COCOA) || PLATFORM(WIN) || PLATFORM(GTK) || PLATFORM(EFL)
</span><span class="lines">@@ -1378,6 +1380,8 @@
</span><span class="cx">
</span><span class="cx"> updateCanBlitOnScrollRecursively();
</span><span class="cx">
</span><ins>+ handleDeferredScrollUpdateAfterContentSizeChange();
+
</ins><span class="cx"> if (document.hasListenerType(Document::OVERFLOWCHANGED_LISTENER))
</span><span class="cx"> updateOverflowStatus(layoutWidth() < contentsWidth(), layoutHeight() < contentsHeight());
</span><span class="cx">
</span><span class="lines">@@ -1409,6 +1413,11 @@
</span><span class="cx"> --m_nestedLayoutCount;
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+bool FrameView::shouldDeferScrollUpdateAfterContentSizeChange()
+{
+ return (m_layoutPhase < InPostLayout) && (m_layoutPhase != OutsideLayout);
+}
+
</ins><span class="cx"> RenderBox* FrameView::embeddedContentBox() const
</span><span class="cx"> {
</span><span class="cx"> RenderView* renderView = this->renderView();
</span><span class="lines">@@ -2097,7 +2106,7 @@
</span><span class="cx"> frame().loader().client().didChangeScrollOffset();
</span><span class="cx"> }
</span><span class="cx">
</span><del>-void FrameView::scrollPositionChangedViaPlatformWidget(const IntPoint& oldPosition, const IntPoint& newPosition)
</del><ins>+void FrameView::scrollPositionChangedViaPlatformWidgetImpl(const IntPoint& oldPosition, const IntPoint& newPosition)
</ins><span class="cx"> {
</span><span class="cx"> updateLayerPositionsAfterScrolling();
</span><span class="cx"> updateCompositingLayersAfterScrolling();
</span><span class="lines">@@ -2181,6 +2190,8 @@
</span><span class="cx">
</span><span class="cx"> void FrameView::updateCompositingLayersAfterScrolling()
</span><span class="cx"> {
</span><ins>+ ASSERT(m_layoutPhase >= InPostLayout || m_layoutPhase == OutsideLayout);
+
</ins><span class="cx"> if (!shouldUpdateCompositingLayersAfterScrolling())
</span><span class="cx"> return;
</span><span class="cx">
</span><span class="lines">@@ -3812,6 +3823,11 @@
</span><span class="cx">
</span><span class="cx"> void FrameView::paintContents(GraphicsContext* context, const IntRect& dirtyRect)
</span><span class="cx"> {
</span><ins>+ if (m_layoutPhase == InViewSizeAdjust)
+ return;
+
+ ASSERT(m_layoutPhase == InPostLayerPositionsUpdatedAfterLayout || m_layoutPhase == OutsideLayout);
+
</ins><span class="cx"> #ifndef NDEBUG
</span><span class="cx"> bool fillWithRed;
</span><span class="cx"> if (frame().document()->printing())
</span></span></pre></div>
<a id="trunkSourceWebCorepageFrameViewh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/FrameView.h (178660 => 178661)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/FrameView.h 2015-01-19 19:45:24 UTC (rev 178660)
+++ trunk/Source/WebCore/page/FrameView.h 2015-01-19 20:02:01 UTC (rev 178661)
</span><span class="lines">@@ -235,7 +235,6 @@
</span><span class="cx"> virtual void setFixedVisibleContentRect(const IntRect&) override;
</span><span class="cx"> #endif
</span><span class="cx"> WEBCORE_EXPORT virtual void setScrollPosition(const IntPoint&) override;
</span><del>- WEBCORE_EXPORT void scrollPositionChangedViaPlatformWidget(const IntPoint& oldPosition, const IntPoint& newPosition);
</del><span class="cx"> virtual void updateLayerPositionsAfterScrolling() override;
</span><span class="cx"> virtual void updateCompositingLayersAfterScrolling() override;
</span><span class="cx"> virtual bool requestScrollPositionUpdate(const IntPoint&) override;
</span><span class="lines">@@ -542,6 +541,7 @@
</span><span class="cx"> InLayout,
</span><span class="cx"> InViewSizeAdjust,
</span><span class="cx"> InPostLayout,
</span><ins>+ InPostLayerPositionsUpdatedAfterLayout,
</ins><span class="cx"> };
</span><span class="cx"> LayoutPhase layoutPhase() const { return m_layoutPhase; }
</span><span class="cx">
</span><span class="lines">@@ -558,6 +558,10 @@
</span><span class="cx">
</span><span class="cx"> bool shouldUpdateCompositingLayersAfterScrolling() const;
</span><span class="cx">
</span><ins>+ virtual bool shouldDeferScrollUpdateAfterContentSizeChange() override;
+
+ virtual void scrollPositionChangedViaPlatformWidgetImpl(const IntPoint& oldPosition, const IntPoint& newPosition) override;
+
</ins><span class="cx"> void applyOverflowToViewport(RenderElement*, ScrollbarMode& hMode, ScrollbarMode& vMode);
</span><span class="cx"> void applyPaginationToViewport();
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformScrollViewcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/ScrollView.cpp (178660 => 178661)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/ScrollView.cpp 2015-01-19 19:45:24 UTC (rev 178660)
+++ trunk/Source/WebCore/platform/ScrollView.cpp 2015-01-19 20:02:01 UTC (rev 178661)
</span><span class="lines">@@ -457,10 +457,41 @@
</span><span class="cx"> scrollTo(newOffset);
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+void ScrollView::scrollPositionChangedViaPlatformWidget(const IntPoint& oldPosition, const IntPoint& newPosition)
+{
+ // We should not attempt to actually modify (paint) platform widgets if the layout phase
+ // is not complete. Instead, defer the scroll event until the layout finishes.
+ if (shouldDeferScrollUpdateAfterContentSizeChange()) {
+ // We only care about the most recent scroll position change request
+ m_deferredScrollPositions = std::make_unique<std::pair<IntPoint, IntPoint>>(std::make_pair(oldPosition, newPosition));
+ return;
+ }
+
+ scrollPositionChangedViaPlatformWidgetImpl(oldPosition, newPosition);
+}
+
+void ScrollView::handleDeferredScrollUpdateAfterContentSizeChange()
+{
+ ASSERT(!shouldDeferScrollUpdateAfterContentSizeChange());
+
+ if (!m_deferredScrollDelta && !m_deferredScrollPositions)
+ return;
+
+ ASSERT(static_cast<bool>(m_deferredScrollDelta) != static_cast<bool>(m_deferredScrollPositions));
+
+ if (m_deferredScrollDelta)
+ completeUpdatesAfterScrollTo(*m_deferredScrollDelta);
+ else if (m_deferredScrollPositions)
+ scrollPositionChangedViaPlatformWidgetImpl(m_deferredScrollPositions->first, m_deferredScrollPositions->second);
+
+ m_deferredScrollDelta = nullptr;
+ m_deferredScrollPositions = nullptr;
+}
+
</ins><span class="cx"> void ScrollView::scrollTo(const IntSize& newOffset)
</span><span class="cx"> {
</span><span class="cx"> IntSize scrollDelta = newOffset - m_scrollOffset;
</span><del>- if (scrollDelta == IntSize())
</del><ins>+ if (scrollDelta.isZero())
</ins><span class="cx"> return;
</span><span class="cx"> m_scrollOffset = newOffset;
</span><span class="cx">
</span><span class="lines">@@ -473,6 +504,19 @@
</span><span class="cx"> return;
</span><span class="cx"> }
</span><span class="cx"> #endif
</span><ins>+ // We should not attempt to actually modify layer contents if the layout phase
+ // is not complete. Instead, defer the scroll event until the layout finishes.
+ if (shouldDeferScrollUpdateAfterContentSizeChange()) {
+ ASSERT(!m_deferredScrollDelta);
+ m_deferredScrollDelta = std::make_unique<IntSize>(scrollDelta);
+ return;
+ }
+
+ completeUpdatesAfterScrollTo(scrollDelta);
+}
+
+void ScrollView::completeUpdatesAfterScrollTo(const IntSize& scrollDelta)
+{
</ins><span class="cx"> updateLayerPositionsAfterScrolling();
</span><span class="cx"> scrollContents(scrollDelta);
</span><span class="cx"> updateCompositingLayersAfterScrolling();
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformScrollViewh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/ScrollView.h (178660 => 178661)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/ScrollView.h 2015-01-19 19:45:24 UTC (rev 178660)
+++ trunk/Source/WebCore/platform/ScrollView.h 2015-01-19 20:02:01 UTC (rev 178661)
</span><span class="lines">@@ -379,6 +379,8 @@
</span><span class="cx">
</span><span class="cx"> virtual bool isScrollView() const override { return true; }
</span><span class="cx">
</span><ins>+ WEBCORE_EXPORT void scrollPositionChangedViaPlatformWidget(const IntPoint& oldPosition, const IntPoint& newPosition);
+
</ins><span class="cx"> protected:
</span><span class="cx"> ScrollView();
</span><span class="cx">
</span><span class="lines">@@ -417,10 +419,18 @@
</span><span class="cx"> float platformTopContentInset() const;
</span><span class="cx"> void platformSetTopContentInset(float);
</span><span class="cx">
</span><ins>+ virtual void handleDeferredScrollUpdateAfterContentSizeChange();
+
+ virtual bool shouldDeferScrollUpdateAfterContentSizeChange() { return false; }
+
+ virtual void scrollPositionChangedViaPlatformWidgetImpl(const IntPoint&, const IntPoint&) { }
+
</ins><span class="cx"> private:
</span><span class="cx"> virtual IntRect visibleContentRectInternal(VisibleContentRectIncludesScrollbars, VisibleContentRectBehavior) const override;
</span><span class="cx"> WEBCORE_EXPORT IntRect unobscuredContentRectInternal(VisibleContentRectIncludesScrollbars = ExcludeScrollbars) const;
</span><span class="cx">
</span><ins>+ void completeUpdatesAfterScrollTo(const IntSize& scrollDelta);
+
</ins><span class="cx"> RefPtr<Scrollbar> m_horizontalScrollbar;
</span><span class="cx"> RefPtr<Scrollbar> m_verticalScrollbar;
</span><span class="cx"> ScrollbarMode m_horizontalScrollbarMode;
</span><span class="lines">@@ -450,6 +460,10 @@
</span><span class="cx"> IntSize m_fixedLayoutSize;
</span><span class="cx"> IntSize m_contentsSize;
</span><span class="cx">
</span><ins>+ std::unique_ptr<IntSize> m_deferredScrollDelta; // Needed for WebKit scrolling
+ std::unique_ptr<std::pair<IntPoint, IntPoint>> m_deferredScrollPositions; // Needed for platform widget scrolling
+
+
</ins><span class="cx"> int m_scrollbarsAvoidingResizer;
</span><span class="cx"> bool m_scrollbarsSuppressed;
</span><span class="cx">
</span></span></pre>
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