ObjectPainter::paintAsStackingContext()

third_party/WebKit/Source/core/paint/ObjectPainter.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ObjectPainter_h
 #define ObjectPainter_h
 
 #include "core/style/ComputedStyleConstants.h"
 #include "wtf/Allocator.h"
 #include "wtf/Vector.h"
@@ skipping 13 matching lines @@
     STACK_ALLOCATED();
 public:
     ObjectPainter(const LayoutObject& layoutObject) : m_layoutObject(layoutObject) { }
 
     void paintOutline(const PaintInfo&, const LayoutPoint& paintOffset);
     void paintInlineChildrenOutlines(const PaintInfo&, const LayoutPoint& paintOffset);
     void addPDFURLRectIfNeeded(const PaintInfo&, const LayoutPoint& paintOffset);
 
     static void drawLineForBoxSide(GraphicsContext&, int x1, int y1, int x2, int y2, BoxSide, Color, EBorderStyle, int adjbw1, int adjbw2, bool antialias = false);
 
+    // Paints the object atomically as if it created a new stacking context, for:
+    // - inline blocks, inline tables, inline-level replaced elements (Section 7.2.1.4 in
+    //   http://www.w3.org/TR/CSS2/zindex.html#painting-order),
+    // - non-positioned floating objects (Section 5 in http://www.w3.org/TR/CSS2/zindex.html#painting-order),
+    // - flex items (http://www.w3.org/TR/css-flexbox-1/#painting),
+    // - grid items (http://www.w3.org/TR/css-grid-1/#z-order),
+    // - custom scrollbar parts.
+    // It is expected that the caller will call this function independent of the value of paintInfo.phase,
+    // and this function will do atomic paint (for PaintPhaseForeground), normal paint (for PaintPhaseSelection
+    // and PaintPhaseTextClip) or nothing (other paint phases) according to paintInfo.phase.
+    void paintAsPseudoStackingContext(const PaintInfo&, const LayoutPoint& paintOffset);
+
 private:
     static void drawDashedOrDottedBoxSide(GraphicsContext&, int x1, int y1, int x2, int y2,
         BoxSide, Color, int thickness, EBorderStyle, bool antialias);
     static void drawDoubleBoxSide(GraphicsContext&, int x1, int y1, int x2, int y2,
         int length, BoxSide, Color, int thickness, int adjacentWidth1, int adjacentWidth2, bool antialias);
     static void drawRidgeOrGrooveBoxSide(GraphicsContext&, int x1, int y1, int x2, int y2,
         BoxSide, Color, EBorderStyle, int adjacentWidth1, int adjacentWidth2, bool antialias);
     static void drawSolidBoxSide(GraphicsContext&, int x1, int y1, int x2, int y2,
         BoxSide, Color, int adjacentWidth1, int adjacentWidth2, bool antialias);
 
     const LayoutObject& m_layoutObject;
 };
 
 } // namespace blink
 
 #endif