First step of PaintInvalidator implementation

third_party/WebKit/Source/core/layout/LayoutTable.cpp

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 24 matching lines @@
 #include "core/layout/LayoutTableCell.h"
 #include "core/layout/LayoutTableCol.h"
 #include "core/layout/LayoutTableSection.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/SubtreeLayoutScope.h"
 #include "core/layout/TableLayoutAlgorithmAuto.h"
 #include "core/layout/TableLayoutAlgorithmFixed.h"
 #include "core/layout/TextAutosizer.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/PaintLayer.h"
+#include "core/paint/TablePaintInvalidator.h"
 #include "core/paint/TablePainter.h"
 #include "core/style/StyleInheritedData.h"
 #include "wtf/PtrUtil.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 LayoutTable::LayoutTable(Element* element)
     : LayoutBlock(element)
@@ skipping 1360 matching lines @@
 
 const BorderValue& LayoutTable::tableEndBorderAdjoiningCell(const LayoutTableCell* cell) const
 {
     ASSERT(cell->isFirstOrLastCellInRow());
     if (hasSameDirectionAs(cell->row()))
         return style()->borderEnd();
 
     return style()->borderStart();
 }
 
+void LayoutTable::ensureIsReadyForPaintInvalidation()
+{
+    LayoutBlock::ensureIsReadyForPaintInvalidation();
+    recalcCollapsedBordersIfNeeded();
+}
+
 PaintInvalidationReason LayoutTable::invalidatePaintIfNeeded(const PaintInvalidationState& paintInvalidationState)
 {
-    // Information of collapsed borders doesn't affect layout and are for painting only.
-    // Do it now instead of during painting to invalidate table cells if needed.
-    recalcCollapsedBordersIfNeeded();
     if (collapseBorders() && !m_collapsedBorders.isEmpty())
         paintInvalidationState.paintingLayer().setNeedsPaintPhaseDescendantBlockBackgrounds();
 
     return LayoutBlock::invalidatePaintIfNeeded(paintInvalidationState);
 }
 
-void LayoutTable::invalidatePaintOfSubtreesIfNeeded(const PaintInvalidationState& childPaintInvalidationState)
+PaintInvalidationReason LayoutTable::invalidatePaintIfNeeded(const PaintInvalidatorContext& context) const
 {
-    // Table cells paint background from the containing column group, column, section and row.
-    // If background of any of them changed, we need to invalidate all affected cells.
-    // Here use shouldDoFullPaintInvalidation() as a broader condition of background change.
-
-    // If any col changed background, we'll check all cells for background changes.
-    bool hasColChangedBackground = false;
-    for (LayoutTableCol* col = firstColumn(); col; col = col->nextColumn()) {
-        if (col->backgroundChangedSinceLastPaintInvalidation()) {
-            hasColChangedBackground = true;
-            break;
-        }
-    }
-    for (LayoutObject* child = firstChild(); child; child = child->nextSibling()) {
-        if (!child->isTableSection())
-            continue;
-        LayoutTableSection* section = toLayoutTableSection(child);
-        if (!hasColChangedBackground && !section->shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState())
-            continue;
-        for (LayoutTableRow* row = section->firstRow(); row; row = row->nextRow()) {
-            if (!hasColChangedBackground && !section->backgroundChangedSinceLastPaintInvalidation() && !row->backgroundChangedSinceLastPaintInvalidation())
-                continue;
-            for (LayoutTableCell* cell = row->firstCell(); cell; cell = cell->nextCell()) {
-                bool invalidated = false;
-                // Table cells paint container's background on the container's backing instead of its own (if any),
-                // so we must invalidate it by the containers.
-                if (section->backgroundChangedSinceLastPaintInvalidation()) {
-                    section->slowSetPaintingLayerNeedsRepaintAndInvalidateDisplayItemClient(*cell, PaintInvalidationStyleChange);
-                    invalidated = true;
-                } else if (hasColChangedBackground) {
-                    ColAndColGroup colAndColGroup = colElementAtAbsoluteColumn(cell->absoluteColumnIndex());
-                    LayoutTableCol* column = colAndColGroup.col;
-                    LayoutTableCol* columnGroup = colAndColGroup.colgroup;
-                    if ((columnGroup && columnGroup->backgroundChangedSinceLastPaintInvalidation())
-                        || (column && column->backgroundChangedSinceLastPaintInvalidation())) {
-                        section->slowSetPaintingLayerNeedsRepaintAndInvalidateDisplayItemClient(*cell, PaintInvalidationStyleChange);
-                        invalidated = true;
-                    }
-                }
-                if ((!invalidated || row->hasSelfPaintingLayer()) && row->backgroundChangedSinceLastPaintInvalidation())
-                    row->slowSetPaintingLayerNeedsRepaintAndInvalidateDisplayItemClient(*cell, PaintInvalidationStyleChange);
-            }
-        }
-    }
-    LayoutBlock::invalidatePaintOfSubtreesIfNeeded(childPaintInvalidationState);
+    return TablePaintInvalidator(*this, context).invalidatePaintIfNeeded();
 }
 
 LayoutUnit LayoutTable::paddingTop() const
 {
     if (collapseBorders())
         return LayoutUnit();
 
     return LayoutBlock::paddingTop();
 }
 
@@ skipping 15 matching lines @@
 
 LayoutUnit LayoutTable::paddingRight() const
 {
     if (collapseBorders())
         return LayoutUnit();
 
     return LayoutBlock::paddingRight();
 }
 
 } // namespace blink