third_party/WebKit/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/style/ComputedStyleConstants.h"
#include "platform/geometry/LayoutRect.h"
#include "wtf/Allocator.h"

namespace blink {

struct CompositionUnderline;
struct PaintInfo;

class Color;
class ComputedStyle;
class DocumentMarker;
class FloatPoint;
class FloatRect;
class Font;
class GraphicsContext;
class InlineTextBox;
class LayoutPoint;
class LayoutTextCombine;

enum class DocumentMarkerPaintPhase { Foreground, Background };

class InlineTextBoxPainter {
    STACK_ALLOCATED();
public:
    InlineTextBoxPainter(const InlineTextBox& inlineTextBox) : m_inlineTextBox(inlineTextBox) { }

    void paint(const PaintInfo&, const LayoutPoint&);
    void paintDocumentMarkers(const PaintInfo&, const LayoutPoint& boxOrigin, const ComputedStyle&, const Font&, DocumentMarkerPaintPhase);
    void paintDocumentMarker(GraphicsContext&, const LayoutPoint& boxOrigin, DocumentMarker*, const ComputedStyle&, const Font&, bool grammar);
    void paintTextMatchMarkerForeground(const PaintInfo&, const LayoutPoint& boxOrigin, DocumentMarker*, const ComputedStyle&, const Font&);
    void paintTextMatchMarkerBackground(const PaintInfo&, const LayoutPoint& boxOrigin, DocumentMarker*, const ComputedStyle&, const Font&);

    static void removeFromTextBlobCache(const InlineTextBox&);

private:
    enum class PaintOptions { Normal, CombinedText };

    void paintCompositionBackgrounds(GraphicsContext&, const LayoutPoint& boxOrigin, const ComputedStyle&, const Font&, bool useCustomUnderlines);
    void paintSingleCompositionBackgroundRun(GraphicsContext&, const LayoutPoint& boxOrigin, const ComputedStyle&, const Font&, Color backgroundColor, int startPos, int endPos);
    template <PaintOptions>
    void paintSelection(GraphicsContext&, const LayoutRect& boxRect, const ComputedStyle&, const Font&, Color textColor, LayoutTextCombine* = nullptr);
    void paintDecoration(const PaintInfo&, const LayoutPoint& boxOrigin, TextDecoration);
    void paintCompositionUnderline(GraphicsContext&, const LayoutPoint& boxOrigin, const CompositionUnderline&);
    unsigned underlinePaintStart(const CompositionUnderline&);
    unsigned underlinePaintEnd(const CompositionUnderline&);
    bool shouldPaintTextBox(const PaintInfo&);
    void expandToIncludeNewlineForSelection(LayoutRect&);

    const InlineTextBox& m_inlineTextBox;
};

} // namespace blink

#endif // InlineTextBoxPainter_h