--- a/src/3rdparty/webkit/WebCore/page/FrameView.cpp	Tue Jul 06 15:10:48 2010 +0300
+++ b/src/3rdparty/webkit/WebCore/page/FrameView.cpp	Wed Aug 18 10:37:55 2010 +0300
@@ -80,23 +80,25 @@
 
 double FrameView::sCurrentPaintTimeStamp = 0.0;
 
+// REPAINT_THROTTLING now chooses default values for throttling parameters.
+// Should be removed when applications start using runtime configuration.
 #if ENABLE(REPAINT_THROTTLING)
 // Normal delay
-static const double deferredRepaintDelay = 0.025;
+double FrameView::s_deferredRepaintDelay = 0.025;
 // Negative value would mean that first few repaints happen without a delay
-static const double initialDeferredRepaintDelayDuringLoading = 0;
+double FrameView::s_initialDeferredRepaintDelayDuringLoading = 0;
 // The delay grows on each repaint to this maximum value
-static const double maxDeferredRepaintDelayDuringLoading = 2.5;
+double FrameView::s_maxDeferredRepaintDelayDuringLoading = 2.5;
 // On each repaint the delay increses by this amount
-static const double deferredRepaintDelayIncrementDuringLoading = 0.5;
+double FrameView::s_deferredRepaintDelayIncrementDuringLoading = 0.5;
 #else
 // FIXME: Repaint throttling could be good to have on all platform.
 // The balance between CPU use and repaint frequency will need some tuning for desktop.
 // More hooks may be needed to reset the delay on things like GIF and CSS animations.
-static const double deferredRepaintDelay = 0;
-static const double initialDeferredRepaintDelayDuringLoading = 0;
-static const double maxDeferredRepaintDelayDuringLoading = 0;
-static const double deferredRepaintDelayIncrementDuringLoading = 0;
+double FrameView::s_deferredRepaintDelay = 0;
+double FrameView::s_initialDeferredRepaintDelayDuringLoading = 0;
+double FrameView::s_maxDeferredRepaintDelayDuringLoading = 0;
+double FrameView::s_deferredRepaintDelayIncrementDuringLoading = 0;
 #endif
 
 // The maximum number of updateWidgets iterations that should be done before returning.
@@ -200,7 +202,7 @@
     m_deferringRepaints = 0;
     m_repaintCount = 0;
     m_repaintRects.clear();
-    m_deferredRepaintDelay = initialDeferredRepaintDelayDuringLoading;
+    m_deferredRepaintDelay = s_initialDeferredRepaintDelayDuringLoading;
     m_deferredRepaintTimer.stop();
     m_lastPaintTime = 0;
     m_paintBehavior = PaintBehaviorNormal;
@@ -882,7 +884,7 @@
 {
     const size_t fixedObjectThreshold = 5;
 
-    ListHashSet<RenderBox*>* positionedObjects = 0;
+    RenderBlock::PositionedObjectsListHashSet* positionedObjects = 0;
     if (RenderView* root = m_frame->contentRenderer())
         positionedObjects = root->positionedObjects();
 
@@ -894,14 +896,14 @@
     // Get the rects of the fixed objects visible in the rectToScroll
     Vector<IntRect, fixedObjectThreshold> subRectToUpdate;
     bool updateInvalidatedSubRect = true;
-    ListHashSet<RenderBox*>::const_iterator end = positionedObjects->end();
-    for (ListHashSet<RenderBox*>::const_iterator it = positionedObjects->begin(); it != end; ++it) {
+    RenderBlock::PositionedObjectsListHashSet::const_iterator end = positionedObjects->end();
+    for (RenderBlock::PositionedObjectsListHashSet::const_iterator it = positionedObjects->begin(); it != end; ++it) {
         RenderBox* renderBox = *it;
         if (renderBox->style()->position() != FixedPosition)
             continue;
-        IntRect topLevelRect;
-        IntRect updateRect = renderBox->paintingRootRect(topLevelRect);
-        updateRect.move(-scrollX(), -scrollY());
+        IntRect updateRect = renderBox->layer()->repaintRectIncludingDescendants();
+        updateRect = contentsToWindow(updateRect);
+
         updateRect.intersect(rectToScroll);
         if (!updateRect.isEmpty()) {
             if (subRectToUpdate.size() >= fixedObjectThreshold) {
@@ -1060,7 +1062,11 @@
 void FrameView::scrollPositionChanged()
 {
     frame()->eventHandler()->sendScrollEvent();
+    repaintFixedElementsAfterScrolling();
+}
 
+void FrameView::repaintFixedElementsAfterScrolling()
+{
     // For fixed position elements, update widget positions and compositing layers after scrolling,
     // but only if we're not inside of layout.
     // FIXME: we could skip this if we knew the page had no fixed position elements.
@@ -1214,13 +1220,13 @@
 {
     Document* document = m_frame->document();
     if (!document || (!document->parsing() && !document->docLoader()->requestCount())) {
-        m_deferredRepaintDelay = deferredRepaintDelay;
+        m_deferredRepaintDelay = s_deferredRepaintDelay;
         return;
     }
-    if (m_deferredRepaintDelay < maxDeferredRepaintDelayDuringLoading) {
-        m_deferredRepaintDelay += deferredRepaintDelayIncrementDuringLoading;
-        if (m_deferredRepaintDelay > maxDeferredRepaintDelayDuringLoading)
-            m_deferredRepaintDelay = maxDeferredRepaintDelayDuringLoading;
+    if (m_deferredRepaintDelay < s_maxDeferredRepaintDelayDuringLoading) {
+        m_deferredRepaintDelay += s_deferredRepaintDelayIncrementDuringLoading;
+        if (m_deferredRepaintDelay > s_maxDeferredRepaintDelayDuringLoading)
+            m_deferredRepaintDelay = s_maxDeferredRepaintDelayDuringLoading;
     }
 }
 
@@ -1309,14 +1315,13 @@
 {
     ASSERT(m_frame->view() == this);
 
-    if (!m_layoutSchedulingEnabled || (m_frame->contentRenderer()
-            && m_frame->contentRenderer()->needsLayout())) {
+    if (m_frame->contentRenderer() && m_frame->contentRenderer()->needsLayout()) {
         if (relayoutRoot)
             relayoutRoot->markContainingBlocksForLayout(false);
         return;
     }
 
-    if (layoutPending()) {
+    if (layoutPending() || !m_layoutSchedulingEnabled) {
         if (m_layoutRoot != relayoutRoot) {
             if (isObjectAncestorContainerOf(m_layoutRoot, relayoutRoot)) {
                 // Keep the current root
@@ -1333,7 +1338,7 @@
                 relayoutRoot->markContainingBlocksForLayout(false);
             }
         }
-    } else {
+    } else if (m_layoutSchedulingEnabled) {
         int delay = m_frame->document()->minimumLayoutDelay();
         m_layoutRoot = relayoutRoot;
         m_delayedLayout = delay != 0;
@@ -2139,4 +2144,28 @@
     return parentPoint;
 }
 
+// Normal delay
+void FrameView::setRepaintThrottlingDeferredRepaintDelay(double p)
+{
+    s_deferredRepaintDelay = p;
+}
+
+// Negative value would mean that first few repaints happen without a delay
+void FrameView::setRepaintThrottlingnInitialDeferredRepaintDelayDuringLoading(double p)
+{
+    s_initialDeferredRepaintDelayDuringLoading = p;
+}
+
+// The delay grows on each repaint to this maximum value
+void FrameView::setRepaintThrottlingMaxDeferredRepaintDelayDuringLoading(double p)
+{
+    s_maxDeferredRepaintDelayDuringLoading = p;
+}
+
+// On each repaint the delay increases by this amount
+void FrameView::setRepaintThrottlingDeferredRepaintDelayIncrementDuringLoading(double p)
+{
+    s_deferredRepaintDelayIncrementDuringLoading = p;
+}
+
 } // namespace WebCore