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/*
* (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004-2017 Apple Inc. 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
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#include "AffineTransform.h"
#include "FloatRect.h"
#include "TextFlags.h"
#include "TextPaintStyle.h"
#include <wtf/text/AtomicString.h>
namespace WebCore {
class FontCascade;
class RenderCombineText;
class ShadowData;
class TextRun;
struct TextPaintStyle;
enum RotationDirection { Counterclockwise, Clockwise };
static inline AffineTransform rotation(const FloatRect& boxRect, RotationDirection clockwise)
{
return clockwise ? AffineTransform(0, 1, -1, 0, boxRect.x() + boxRect.maxY(), boxRect.maxY() - boxRect.x())
: AffineTransform(0, -1, 1, 0, boxRect.x() - boxRect.maxY(), boxRect.x() + boxRect.maxY());
}
class TextPainter {
public:
TextPainter(GraphicsContext&);
void setStyle(const TextPaintStyle& textPaintStyle) { m_style = textPaintStyle; }
void setSelectionStyle(const TextPaintStyle& selectionPaintStyle) { m_selectionStyle = selectionPaintStyle; }
void setShadow(const ShadowData* shadow) { m_shadow = shadow; }
void setSelectionShadow(const ShadowData* selectionShadow) { m_selectionShadow = selectionShadow; }
void setFont(const FontCascade& font) { m_font = &font; }
void setIsHorizontal(bool isHorizontal) { m_textBoxIsHorizontal = isHorizontal; }
void setEmphasisMark(const AtomicString& mark, float offset, RenderCombineText*);
void paintRange(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin, unsigned start, unsigned end);
void paint(const TextRun&, unsigned length, const FloatRect& boxRect, const FloatPoint& textOrigin,
unsigned selectionStart = 0, unsigned selectionEnd = 0, bool paintSelectedTextOnly = false, bool paintSelectedTextSeparately = false, bool paintNonSelectedTextOnly = false);
private:
void paintTextOrEmphasisMarks(const FontCascade&, const TextRun&, const AtomicString& emphasisMark, float emphasisMarkOffset,
const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset);
void paintTextWithShadows(const ShadowData*, const FontCascade&, const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin,
unsigned startOffset, unsigned endOffset, const AtomicString& emphasisMark, float emphasisMarkOffset, bool stroked);
void paintTextAndEmphasisMarksIfNeeded(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset,
const TextPaintStyle&, const ShadowData*);
GraphicsContext& m_context;
const FontCascade* m_font { nullptr };
TextPaintStyle m_style;
TextPaintStyle m_selectionStyle;
const ShadowData* m_shadow { nullptr };
const ShadowData* m_selectionShadow { nullptr };
AtomicString m_emphasisMark;
RenderCombineText* m_combinedText { nullptr };
float m_emphasisMarkOffset { 0 };
bool m_textBoxIsHorizontal { true };
};
inline void TextPainter::setEmphasisMark(const AtomicString& mark, float offset, RenderCombineText* combinedText)
{
m_emphasisMark = mark;
m_emphasisMarkOffset = offset;
m_combinedText = combinedText;
}
class ShadowApplier {
public:
ShadowApplier(GraphicsContext&, const ShadowData*, const FloatRect& textRect, bool lastShadowIterationShouldDrawText = true, bool opaque = false, FontOrientation = Horizontal);
FloatSize extraOffset() const { return m_extraOffset; }
bool nothingToDraw() const { return m_nothingToDraw; }
bool didSaveContext() const { return m_didSaveContext; }
~ShadowApplier();
private:
bool isLastShadowIteration();
bool shadowIsCompletelyCoveredByText(bool textIsOpaque);
FloatSize m_extraOffset;
GraphicsContext& m_context;
const ShadowData* m_shadow;
bool m_onlyDrawsShadow : 1;
bool m_avoidDrawingShadow : 1;
bool m_nothingToDraw : 1;
bool m_didSaveContext : 1;
};
} // namespace WebCore
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