From cd44dc59cdfc39534aef4d417e9f3c412e3be139 Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@nokia.com>
Date: Fri, 3 Feb 2012 09:55:33 +0100
Subject: Imported WebKit commit fce473cb4d55aa9fe9d0b0322a2fffecb731b961
 (http://svn.webkit.org/repository/webkit/trunk@106560)

---
 Source/WebCore/page/FrameView.cpp | 100 +++++++++++++++++---------------------
 1 file changed, 44 insertions(+), 56 deletions(-)

(limited to 'Source/WebCore/page/FrameView.cpp')

diff --git a/Source/WebCore/page/FrameView.cpp b/Source/WebCore/page/FrameView.cpp
index 56f6c60c2..9fc1cc605 100644
--- a/Source/WebCore/page/FrameView.cpp
+++ b/Source/WebCore/page/FrameView.cpp
@@ -131,10 +131,6 @@ FrameView::FrameView(Frame* frame)
     , m_fixedObjectCount(0)
     , m_layoutTimer(this, &FrameView::layoutTimerFired)
     , m_layoutRoot(0)
-#if ENABLE(SVG)
-    , m_inLayoutParentView(false)
-#endif
-    , m_hasPendingPostLayoutTasks(false)
     , m_inSynchronousPostLayout(false)
     , m_postLayoutTasksTimer(this, &FrameView::postLayoutTimerFired)
     , m_isTransparent(false)
@@ -186,7 +182,7 @@ PassRefPtr<FrameView> FrameView::create(Frame* frame, const IntSize& initialSize
 
 FrameView::~FrameView()
 {
-    if (m_hasPendingPostLayoutTasks) {
+    if (m_postLayoutTasksTimer.isActive()) {
         m_postLayoutTasksTimer.stop();
         m_actionScheduler->clear();
     }
@@ -222,7 +218,6 @@ void FrameView::reset()
     m_cannotBlitToWindow = false;
     m_isOverlapped = false;
     m_contentIsOpaque = false;
-    m_shouldLayoutFixedElementsRelativeToFrame = false;
     m_borderX = 30;
     m_borderY = 30;
     m_layoutTimer.stop();
@@ -232,7 +227,6 @@ void FrameView::reset()
     m_layoutSchedulingEnabled = true;
     m_inLayout = false;
     m_inSynchronousPostLayout = false;
-    m_hasPendingPostLayoutTasks = false;
     m_layoutCount = 0;
     m_nestedLayoutCount = 0;
     m_postLayoutTasksTimer.stop();
@@ -648,14 +642,15 @@ void FrameView::calculateScrollbarModesForLayout(ScrollbarMode& hMode, Scrollbar
     }    
 }
 
-#if ENABLE(FULLSCREEN_API) && USE(ACCELERATED_COMPOSITING)
+#if USE(ACCELERATED_COMPOSITING)
+
+#if ENABLE(FULLSCREEN_API)
 static bool isDocumentRunningFullScreenAnimation(Document* document)
 {
     return document->webkitIsFullScreen() && document->fullScreenRenderer() && document->isAnimatingFullScreen();
 }
 #endif
-    
-#if USE(ACCELERATED_COMPOSITING)
+
 void FrameView::updateCompositingLayers()
 {
     RenderView* root = rootRenderer(this);
@@ -720,7 +715,7 @@ GraphicsLayer* FrameView::layerForScrollCorner() const
     return root->compositor()->layerForScrollCorner();
 }
 
-#if PLATFORM(CHROMIUM) && ENABLE(RUBBER_BANDING)
+#if ENABLE(RUBBER_BANDING)
 GraphicsLayer* FrameView::layerForOverhangAreas() const
 {
     RenderView* root = rootRenderer(this);
@@ -746,7 +741,7 @@ bool FrameView::syncCompositingStateForThisFrame(Frame* rootFrameForSync)
     root->compositor()->flushPendingLayerChanges(rootFrameForSync == m_frame);
 
 #if ENABLE(FULLSCREEN_API)
-    // The fullScreenRenderer's graphicsLayer  has been re-parented, and the above recursive syncCompositingState
+    // The fullScreenRenderer's graphicsLayer has been re-parented, and the above recursive syncCompositingState
     // call will not cause the subtree under it to repaint.  Explicitly call the syncCompositingState on 
     // the fullScreenRenderer's graphicsLayer here:
     Document* document = m_frame->document();
@@ -901,9 +896,6 @@ static inline void collectFrameViewChildren(FrameView* frameView, Vector<RefPtr<
 inline void FrameView::forceLayoutParentViewIfNeeded()
 {
 #if ENABLE(SVG)
-    if (m_inLayoutParentView)
-        return;
-
     RenderPart* ownerRenderer = m_frame->ownerRenderer();
     if (!ownerRenderer || !ownerRenderer->frame())
         return;
@@ -913,28 +905,22 @@ inline void FrameView::forceLayoutParentViewIfNeeded()
         return;
 
     RenderSVGRoot* svgRoot = toRenderSVGRoot(contentBox);
-    if (!svgRoot->needsSizeNegotiationWithHostDocument())
+    if (svgRoot->everHadLayout() && !svgRoot->needsLayout())
         return;
 
-    ASSERT(!m_inLayoutParentView);
-    TemporaryChange<bool> resetInLayoutParentView(m_inLayoutParentView, true);
-
-    // Clear needs-size-negotiation flag in RenderSVGRoot, so the next call to our
-    // layout() method won't fire the size negotiation logic again.
-    svgRoot->scheduledSizeNegotiationWithHostDocument();
-    ASSERT(!svgRoot->needsSizeNegotiationWithHostDocument());
+    // If the embedded SVG document appears the first time, the ownerRenderer has already finished
+    // layout without knowing about the existence of the embedded SVG document, because RenderReplaced
+    // embeddedContentBox() returns 0, as long as the embedded document isn't loaded yet. Before
+    // bothering to lay out the SVG document, mark the ownerRenderer needing layout and ask its
+    // FrameView for a layout. After that the RenderEmbeddedObject (ownerRenderer) carries the
+    // correct size, which RenderSVGRoot::computeReplacedLogicalWidth/Height rely on, when laying
+    // out for the first time, or when the RenderSVGRoot size has changed dynamically (eg. via <script>).
+    RefPtr<FrameView> frameView = ownerRenderer->frame()->view();
 
     // Mark the owner renderer as needing layout.
     ownerRenderer->setNeedsLayoutAndPrefWidthsRecalc();
 
-    // Immediately relayout the child widgets, which can now calculate the SVG documents
-    // intrinsic size, negotiating with the parent object/embed/iframe.
-    RenderView* rootView = ownerRenderer->frame()->contentRenderer();
-    ASSERT(rootView);
-    rootView->updateWidgetPositions();
-
     // Synchronously enter layout, to layout the view containing the host object/embed/iframe.
-    FrameView* frameView = ownerRenderer->frame()->view();
     ASSERT(frameView);
     frameView->layout();
 #endif
@@ -994,11 +980,10 @@ void FrameView::layout(bool allowSubtree)
     {
         TemporaryChange<bool> changeSchedulingEnabled(m_layoutSchedulingEnabled, false);
 
-        if (!m_nestedLayoutCount && !m_inSynchronousPostLayout && m_hasPendingPostLayoutTasks && !inSubframeLayoutWithFrameFlattening) {
+        if (!m_nestedLayoutCount && !m_inSynchronousPostLayout && m_postLayoutTasksTimer.isActive() && !inSubframeLayoutWithFrameFlattening) {
             // This is a new top-level layout. If there are any remaining tasks from the previous
             // layout, finish them now.
             m_inSynchronousPostLayout = true;
-            m_postLayoutTasksTimer.stop();
             performPostLayoutTasks();
             m_inSynchronousPostLayout = false;
         }
@@ -1074,7 +1059,7 @@ void FrameView::layout(bool allowSubtree)
 
                     m_firstLayout = false;
                     m_firstLayoutCallbackPending = true;
-                    m_lastLayoutSize = LayoutSize(width(), height());
+                    m_lastLayoutSize = LayoutSize(layoutWidth(), layoutHeight());
                     m_lastZoomFactor = root->style()->zoom();
 
                     // Set the initial vMode to AlwaysOn if we're auto.
@@ -1122,6 +1107,7 @@ void FrameView::layout(bool allowSubtree)
 
             m_inLayout = true;
             beginDeferredRepaints();
+            forceLayoutParentViewIfNeeded();
             root->layout();
             endDeferredRepaints();
             m_inLayout = false;
@@ -1170,7 +1156,7 @@ void FrameView::layout(bool allowSubtree)
         updateOverflowStatus(layoutWidth() < contentsWidth(),
                              layoutHeight() < contentsHeight());
 
-    if (!m_hasPendingPostLayoutTasks) {
+    if (!m_postLayoutTasksTimer.isActive()) {
         if (!m_inSynchronousPostLayout) {
             if (inSubframeLayoutWithFrameFlattening) {
                 if (RenderView* root = rootRenderer(this))
@@ -1183,12 +1169,11 @@ void FrameView::layout(bool allowSubtree)
             }
         }
         
-        if (!m_hasPendingPostLayoutTasks && (needsLayout() || m_inSynchronousPostLayout || inSubframeLayoutWithFrameFlattening)) {
+        if (!m_postLayoutTasksTimer.isActive() && (needsLayout() || m_inSynchronousPostLayout || inSubframeLayoutWithFrameFlattening)) {
             // If we need layout or are already in a synchronous call to postLayoutTasks(), 
             // defer widget updates and event dispatch until after we return. postLayoutTasks()
             // can make us need to update again, and we can get stuck in a nasty cycle unless
             // we call it through the timer here.
-            m_hasPendingPostLayoutTasks = true;
             m_postLayoutTasksTimer.startOneShot(0);
             if (needsLayout()) {
                 m_actionScheduler->pause();
@@ -1210,7 +1195,6 @@ void FrameView::layout(bool allowSubtree)
         return;
 
     page->chrome()->client()->layoutUpdated(frame());
-    forceLayoutParentViewIfNeeded();
 }
 
 RenderBox* FrameView::embeddedContentBox() const
@@ -1419,7 +1403,7 @@ int FrameView::scrollXForFixedPosition() const
     // When the page is scaled, the scaled "viewport" with respect to which fixed object are positioned
     // doesn't move as fast as the content view, so that when the content is scrolled all the way to the
     // end, the bottom of the scaled "viewport" touches the bottom of the real viewport.
-    float dragFactor = shouldLayoutFixedElementsRelativeToFrame() ? 1 : (contentsWidth() - visibleContentWidth * frameScaleFactor) / maxX;
+    float dragFactor = fixedElementsLayoutRelativeToFrame() ? 1 : (contentsWidth() - visibleContentWidth * frameScaleFactor) / maxX;
 
     return x * dragFactor / frameScaleFactor;
 }
@@ -1450,7 +1434,7 @@ int FrameView::scrollYForFixedPosition() const
         return y;
 
     float frameScaleFactor = m_frame->frameScaleFactor();
-    float dragFactor = shouldLayoutFixedElementsRelativeToFrame() ? 1 : (contentsHeight() - visibleContentHeight * frameScaleFactor) / maxY;
+    float dragFactor = fixedElementsLayoutRelativeToFrame() ? 1 : (contentsHeight() - visibleContentHeight * frameScaleFactor) / maxY;
     return y * dragFactor / frameScaleFactor;
 }
 
@@ -1459,18 +1443,15 @@ IntSize FrameView::scrollOffsetForFixedPosition() const
     return IntSize(scrollXForFixedPosition(), scrollYForFixedPosition());
 }
 
-void FrameView::setShouldLayoutFixedElementsRelativeToFrame(bool shouldLayoutFixedElementsRelativeToFrame)
+bool FrameView::fixedElementsLayoutRelativeToFrame() const
 {
-    if (shouldLayoutFixedElementsRelativeToFrame == m_shouldLayoutFixedElementsRelativeToFrame)
-        return;
-
-    m_shouldLayoutFixedElementsRelativeToFrame = shouldLayoutFixedElementsRelativeToFrame;
-
-    if (!hasFixedObjects())
-        return;
+    ASSERT(m_frame);
+    if (!m_frame->settings())
+        return false;
 
-    setNeedsLayout();
+    return m_frame->settings()->fixedElementsLayoutRelativeToFrame();
 }
+
 IntPoint FrameView::currentMousePosition() const
 {
     return m_frame ? m_frame->eventHandler()->currentMousePosition() : IntPoint();
@@ -1717,6 +1698,14 @@ void FrameView::setScrollPosition(const IntPoint& scrollPoint)
     ScrollView::setScrollPosition(scrollPoint);
 }
 
+void FrameView::delegatesScrollingDidChange()
+{
+#if USE(ACCELERATED_COMPOSITING)
+    // When we switch to delgatesScrolling mode, we should destroy the scrolling/clipping layers in RenderLayerCompositor.
+    clearBackingStores();
+#endif
+}
+
 void FrameView::setFixedVisibleContentRect(const IntRect& visibleContentRect)
 {
     IntSize offset = scrollOffset();
@@ -1740,7 +1729,7 @@ void FrameView::scrollPositionChanged()
 #if USE(ACCELERATED_COMPOSITING)
     if (RenderView* root = rootRenderer(this)) {
         if (root->usesCompositing())
-            root->compositor()->frameViewDidScroll(scrollPosition());
+            root->compositor()->frameViewDidScroll();
     }
 #endif
 }
@@ -2093,8 +2082,6 @@ void FrameView::setNeedsLayout()
 
 void FrameView::unscheduleRelayout()
 {
-    m_postLayoutTasksTimer.stop();
-
     if (!m_layoutTimer.isActive())
         return;
 
@@ -2276,16 +2263,15 @@ bool FrameView::updateWidgets()
 
 void FrameView::flushAnyPendingPostLayoutTasks()
 {
-    if (!m_hasPendingPostLayoutTasks)
+    if (!m_postLayoutTasksTimer.isActive())
         return;
 
-    m_postLayoutTasksTimer.stop();
     performPostLayoutTasks();
 }
 
 void FrameView::performPostLayoutTasks()
 {
-    m_hasPendingPostLayoutTasks = false;
+    m_postLayoutTasksTimer.stop();
 
     m_frame->selection()->setCaretRectNeedsUpdate();
     m_frame->selection()->updateAppearance();
@@ -2294,6 +2280,8 @@ void FrameView::performPostLayoutTasks()
         if (m_firstLayoutCallbackPending) {
             m_firstLayoutCallbackPending = false;
             m_frame->loader()->didFirstLayout();
+            if (Page* page = m_frame->page())
+                page->startCountingRelevantRepaintedObjects();
         }
 
         // Ensure that we always send this eventually.
@@ -2322,7 +2310,7 @@ void FrameView::performPostLayoutTasks()
     m_actionScheduler->resume();
 
     if (!root->printing()) {
-        LayoutSize currentSize = LayoutSize(width(), height());
+        LayoutSize currentSize = LayoutSize(layoutWidth(), layoutHeight());
         float currentZoomFactor = root->style()->zoom();
         bool resized = !m_firstLayout && (currentSize != m_lastLayoutSize || currentZoomFactor != m_lastZoomFactor);
         m_lastLayoutSize = currentSize;
@@ -2866,7 +2854,7 @@ void FrameView::paintContents(GraphicsContext* p, const IntRect& rect)
     FontCachePurgePreventer fontCachePurgePreventer;
 
 #if USE(ACCELERATED_COMPOSITING)
-    if (!p->paintingDisabled())
+    if (!p->paintingDisabled() && !document->printing())
         syncCompositingStateForThisFrame(m_frame.get());
 #endif
 
-- 
cgit v1.2.1