Move painting code from InlineTextBox to InlineTextBoxPainter.

Source/core/paint/InlineTextBoxPainter.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 InlineTextBoxPainter_h
+#define InlineTextBoxPainter_h
+
+#include "core/rendering/style/RenderStyleConstants.h"
+
+namespace blink {
+
+struct CompositionUnderline;
+struct PaintInfo;
+
+class Color;
+class DocumentMarker;
+class FloatPoint;
+class Font;
+class GraphicsContext;
+class InlineTextBox;
+class LayoutPoint;
+class RenderStyle;
+
+class InlineTextBoxPainter {
+public:
+    InlineTextBoxPainter(InlineTextBox& inlineTextBox) : m_inlineTextBox(inlineTextBox) { }
+
+    void paint(PaintInfo&, const LayoutPoint&);
+    void paintDocumentMarkers(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, bool background);
+    void paintDocumentMarker(GraphicsContext*, const FloatPoint& boxOrigin, DocumentMarker*, RenderStyle*, const Font&, bool grammar);
+    void paintTextMatchMarker(GraphicsContext*, const FloatPoint& boxOrigin, DocumentMarker*, RenderStyle*, const Font&);
+
+    static void removeFromTextBlobCache(InlineTextBox&);
+
+private:
+    void paintCompositionBackgrounds(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, bool useCustomUnderlines);
+    void paintSingleCompositionBackgroundRun(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, Color backgroundColor, int startPos, int endPos);
+    void paintSelection(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, Color textColor);
+    void paintDecoration(GraphicsContext*, const FloatPoint& boxOrigin, TextDecoration);
+    void paintCompositionUnderline(GraphicsContext*, const FloatPoint& boxOrigin, const CompositionUnderline&);
+    unsigned underlinePaintStart(const CompositionUnderline&);
+    unsigned underlinePaintEnd(const CompositionUnderline&);
+
+    InlineTextBox& m_inlineTextBox;
+};
+
+} // namespace blink
+
+#endif // InlineTextBoxPainter_h