Divorce PaintInvalidationState from LayoutState

Source/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 1527 matching lines @@
             }
 
             layerRenderer->invalidatePaintRectangle(geometry.destRect());
             if (geometry.destRect() == rendererRect)
                 return true;
         }
     }
     return false;
 }
 
-void RenderBox::invalidateTreeAfterLayout(const RenderLayerModelObject& paintInvalidationContainer)
+void RenderBox::invalidateTreeAfterLayout(const PaintInvalidationState& paintInvalidationState)
 {
     // FIXME: Currently only using this logic for RenderBox and its ilk. Ideally, RenderBlockFlows with
     // inline children should track a dirty rect in local coordinates for dirty lines instead of invalidating
     // the world.
     // FIXME: We should still be recursing through inline's children, as they can have boxes, but we don't
     // appear to have tests for this?
     // FIXME: SVG should probably also go through this unified paint invalidation system.
     ASSERT(!needsLayout());
 
     if (!shouldCheckForPaintInvalidationAfterLayout())
         return;
 
     bool establishesNewPaintInvalidationContainer = isPaintInvalidationContainer();
-    const RenderLayerModelObject& newPaintInvalidationContainer = *adjustCompositedContainerForSpecialAncestors(establishesNewPaintInvalidationContainer ? this : &paintInvalidationContainer);
+    const RenderLayerModelObject& newPaintInvalidationContainer = *adjustCompositedContainerForSpecialAncestors(establishesNewPaintInvalidationContainer ? this : &paintInvalidationState.paintInvalidationContainer());
     // FIXME: This assert should be re-enabled when we move paint invalidation to after compositing update. crbug.com/360286
     // ASSERT(&newPaintInvalidationContainer == containerForPaintInvalidation());
 
     const LayoutRect oldPaintInvalidationRect = previousPaintInvalidationRect();
     const LayoutPoint oldPositionFromPaintInvalidationContainer = previousPositionFromPaintInvalidationContainer();
-    setPreviousPaintInvalidationRect(boundsRectForPaintInvalidation(&newPaintInvalidationContainer));
-    setPreviousPositionFromPaintInvalidationContainer(RenderLayer::positionFromPaintInvalidationContainer(this, &newPaintInvalidationContainer));
+    setPreviousPaintInvalidationRect(boundsRectForPaintInvalidation(&newPaintInvalidationContainer, &paintInvalidationState));
+    setPreviousPositionFromPaintInvalidationContainer(RenderLayer::positionFromPaintInvalidationContainer(this, &newPaintInvalidationContainer, &paintInvalidationState));
 
     // If we are set to do a full paint invalidation that means the RenderView will be
     // issue paint invalidations. We can then skip issuing of paint invalidations for the child
     // renderers as they'll be covered by the RenderView.
     if (view()->doingFullRepaint()) {
-        LayoutState state(*this, isTableRow() ? LayoutSize() : locationOffset());
-        RenderObject::invalidateTreeAfterLayout(newPaintInvalidationContainer);
+        PaintInvalidationState childTreeWalkState(paintInvalidationState, *this, newPaintInvalidationContainer);
+        RenderObject::invalidateTreeAfterLayout(childTreeWalkState);
         return;
     }
 
     if ((onlyNeededPositionedMovementLayout() && compositingState() != PaintsIntoOwnBacking)
         || (shouldDoFullPaintInvalidationIfSelfPaintingLayer()
             && hasLayer()
             && layer()->isSelfPaintingLayer())) {
         setShouldDoFullPaintInvalidationAfterLayout(true);
     }
 
     if (!invalidatePaintIfNeeded(&newPaintInvalidationContainer, oldPaintInvalidationRect, oldPositionFromPaintInvalidationContainer))
         invalidatePaintForOverflowIfNeeded();
 
     // Issue paint invalidations for any scrollbars if there is a scrollable area for this renderer.
     if (enclosingLayer()) {
         if (RenderLayerScrollableArea* area = enclosingLayer()->scrollableArea()) {
             if (area->hasVerticalBarDamage())
                 invalidatePaintRectangle(area->verticalBarDamage());
             if (area->hasHorizontalBarDamage())
                 invalidatePaintRectangle(area->horizontalBarDamage());
             area->resetScrollbarDamage();
         }
     }
 
-    // FIXME: LayoutState should be enabled for other paint invalidation containers than the RenderView. crbug.com/363834
-    if (establishesNewPaintInvalidationContainer && !isRenderView()) {
-        ForceHorriblySlowRectMapping slowRectMapping(*this);
-        RenderObject::invalidateTreeAfterLayout(newPaintInvalidationContainer);
-    } else {
-        // FIXME: This concept of a tree walking state for fast lookups should be generalized away from
-        // just layout.
-        // FIXME: Table rows shouldn't be special-cased.
-        LayoutState state(*this, isTableRow() ? LayoutSize() : locationOffset());
-        RenderObject::invalidateTreeAfterLayout(newPaintInvalidationContainer);
-    }
+    PaintInvalidationState childTreeWalkState(paintInvalidationState, *this, newPaintInvalidationContainer);
+    RenderObject::invalidateTreeAfterLayout(childTreeWalkState);
 }
 
 bool RenderBox::pushContentsClip(PaintInfo& paintInfo, const LayoutPoint& accumulatedOffset, ContentsClipBehavior contentsClipBehavior)
 {
     if (paintInfo.phase == PaintPhaseBlockBackground || paintInfo.phase == PaintPhaseSelfOutline || paintInfo.phase == PaintPhaseMask)
         return false;
 
     bool isControlClip = hasControlClip();
     bool isOverflowClip = hasOverflowClip() && !layer()->isSelfPaintingLayer();
 
@@ skipping 160 matching lines @@
     if (!logicalHeightLength.isFixed()) {
         LayoutUnit fillFallbackExtent = containingBlockStyle->isHorizontalWritingMode() ? view()->frameView()->visibleHeight() : view()->frameView()->visibleWidth();
         LayoutUnit fillAvailableExtent = containingBlock()->availableLogicalHeight(ExcludeMarginBorderPadding);
         return std::min(fillAvailableExtent, fillFallbackExtent);
     }
 
     // Use the content box logical height as specified by the style.
     return cb->adjustContentBoxLogicalHeightForBoxSizing(logicalHeightLength.value());
 }
 
-void RenderBox::mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState& transformState, MapCoordinatesFlags mode, bool* wasFixed) const
+void RenderBox::mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState& transformState, MapCoordinatesFlags mode, bool* wasFixed, const PaintInvalidationState* paintInvalidationState) const
 {
     if (repaintContainer == this)
         return;
 
-    if (RenderView* v = view()) {
-        if (v->canMapUsingLayoutStateForContainer(repaintContainer)) {
-            LayoutState* layoutState = v->layoutState();
-            LayoutSize offset = layoutState->paintOffset() + locationOffset();
-            if (style()->hasInFlowPosition() && layer())
-                offset += layer()->offsetForInFlowPosition();
-            transformState.move(offset);
-            return;
-        }
+    if (paintInvalidationState && paintInvalidationState->canMapToContainer(repaintContainer)) {
+        LayoutSize offset = paintInvalidationState->paintOffset() + locationOffset();
+        if (style()->hasInFlowPosition() && layer())
+            offset += layer()->offsetForInFlowPosition();
+        transformState.move(offset);
+        return;
     }
 
     bool containerSkipped;
     RenderObject* o = container(repaintContainer, &containerSkipped);
     if (!o)
         return;
 
     bool isFixedPos = style()->position() == FixedPosition;
     bool hasTransform = hasLayer() && layer()->transform();
     // If this box has a transform, it acts as a fixed position container for fixed descendants,
@@ skipping 24 matching lines @@
         return;
     }
 
     mode &= ~ApplyContainerFlip;
 
     o->mapLocalToContainer(repaintContainer, transformState, mode, wasFixed);
 }
 
 void RenderBox::mapAbsoluteToLocalPoint(MapCoordinatesFlags mode, TransformState& transformState) const
 {
-    // We don't expect to be called during layout.
-    ASSERT(!view() || !view()->layoutStateCachedOffsetsEnabled());
-
     bool isFixedPos = style()->position() == FixedPosition;
     bool hasTransform = hasLayer() && layer()->transform();
     if (hasTransform && !isFixedPos) {
         // If this box has a transform, it acts as a fixed position container for fixed descendants,
         // and may itself also be fixed position. So propagate 'fixed' up only if this box is fixed position.
         mode &= ~IsFixed;
     } else if (isFixedPos)
         mode |= IsFixed;
 
     RenderBoxModelObject::mapAbsoluteToLocalPoint(mode, transformState);
@@ skipping 97 matching lines @@
 {
     if (inlineBoxWrapper()) {
         if (!documentBeingDestroyed())
             inlineBoxWrapper()->remove();
         inlineBoxWrapper()->destroy();
         ASSERT(m_rareData);
         m_rareData->m_inlineBoxWrapper = 0;
     }
 }
 
-LayoutRect RenderBox::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer) const
+LayoutRect RenderBox::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
 {
     if (style()->visibility() != VISIBLE && enclosingLayer()->subtreeIsInvisible())
         return LayoutRect();
 
     LayoutRect r = visualOverflowRect();
-    mapRectToPaintInvalidationBacking(paintInvalidationContainer, r);
+    mapRectToPaintInvalidationBacking(paintInvalidationContainer, r, paintInvalidationState);
     return r;
 }
 
-void RenderBox::mapRectToPaintInvalidationBacking(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect& rect, bool fixed) const
+void RenderBox::mapRectToPaintInvalidationBacking(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect& rect, bool fixed, const PaintInvalidationState* paintInvalidationState) const
 {
     // The rect we compute at each step is shifted by our x/y offset in the parent container's coordinate space.
     // Only when we cross a writing mode boundary will we have to possibly flipForWritingMode (to convert into a more appropriate
     // offset corner for the enclosing container).  This allows for a fully RL or BT document to repaint
     // properly even during layout, since the rect remains flipped all the way until the end.
     //
     // RenderView::computeRectForRepaint then converts the rect to physical coordinates.  We also convert to
     // physical when we hit a paintInvalidationContainer boundary. Therefore the final rect returned is always in the
     // physical coordinate space of the paintInvalidationContainer.
     RenderStyle* styleToUse = style();
-    if (RenderView* v = view()) {
-        // LayoutState is only valid for root-relative, non-fixed position repainting
-        if (v->canMapUsingLayoutStateForContainer(paintInvalidationContainer) && styleToUse->position() != FixedPosition) {
-            LayoutState* layoutState = v->layoutState();
 
-            if (layer() && layer()->transform())
-                rect = layer()->transform()->mapRect(pixelSnappedIntRect(rect));
+    if (paintInvalidationState && paintInvalidationState->canMapToContainer(paintInvalidationContainer) && styleToUse->position() != FixedPosition) {
+        if (layer() && layer()->transform())
+            rect = layer()->transform()->mapRect(pixelSnappedIntRect(rect));
 
-            // We can't trust the bits on RenderObject, because this might be called while re-resolving style.
-            if (styleToUse->hasInFlowPosition() && layer())
-                rect.move(layer()->offsetForInFlowPosition());
+        // We can't trust the bits on RenderObject, because this might be called while re-resolving style.
+        if (styleToUse->hasInFlowPosition() && layer())
+            rect.move(layer()->offsetForInFlowPosition());
 
-            rect.moveBy(location());
-            rect.move(layoutState->paintOffset());
-            if (layoutState->isClipped())
-                rect.intersect(layoutState->clipRect());
-            return;
-        }
+        rect.moveBy(location());
+        rect.move(paintInvalidationState->paintOffset());
+        if (paintInvalidationState->isClipped())
+            rect.intersect(paintInvalidationState->clipRect());
+        return;
     }
 
     if (hasReflection())
         rect.unite(reflectedRect(rect));
 
     if (paintInvalidationContainer == this) {
         if (paintInvalidationContainer->style()->isFlippedBlocksWritingMode())
             flipForWritingMode(rect);
         return;
     }
@@ skipping 48 matching lines @@
             return;
     }
 
     if (containerSkipped) {
         // If the paintInvalidationContainer is below o, then we need to map the rect into paintInvalidationContainer's coordinates.
         LayoutSize containerOffset = paintInvalidationContainer->offsetFromAncestorContainer(o);
         rect.move(-containerOffset);
         return;
     }
 
-    o->mapRectToPaintInvalidationBacking(paintInvalidationContainer, rect, fixed);
+    o->mapRectToPaintInvalidationBacking(paintInvalidationContainer, rect, fixed, paintInvalidationState);
 }
 
 void RenderBox::invalidatePaintForOverhangingFloats(bool)
 {
 }
 
 void RenderBox::updateLogicalWidth()
 {
     LogicalExtentComputedValues computedValues;
     computeLogicalWidth(computedValues);
@@ skipping 2578 matching lines @@
         return 0;
 
     if (!layoutState && !flowThreadContainingBlock())
         return 0;
 
     RenderBlock* containerBlock = containingBlock();
     return containerBlock->offsetFromLogicalTopOfFirstPage() + logicalTop();
 }
 
 } // namespace WebCore