128 lines
5.2 KiB
C++
128 lines
5.2 KiB
C++
/*
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* (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 2000 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2004-2017 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#pragma once
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#include "AffineTransform.h"
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#include "FloatRect.h"
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#include "GlyphDisplayListCache.h"
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#include "TextFlags.h"
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#include "TextPaintStyle.h"
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#include <wtf/text/AtomString.h>
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namespace WebCore {
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class FilterOperations;
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class FontCascade;
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class RenderCombineText;
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class ShadowData;
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class TextRun;
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struct TextPaintStyle;
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enum RotationDirection { Counterclockwise, Clockwise };
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static inline AffineTransform rotation(const FloatRect& boxRect, RotationDirection clockwise)
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{
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return clockwise ? AffineTransform(0, 1, -1, 0, boxRect.x() + boxRect.maxY(), boxRect.maxY() - boxRect.x())
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: AffineTransform(0, -1, 1, 0, boxRect.x() - boxRect.maxY(), boxRect.x() + boxRect.maxY());
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}
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class TextPainter {
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public:
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TextPainter(GraphicsContext&);
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void setStyle(const TextPaintStyle& textPaintStyle) { m_style = textPaintStyle; }
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void setShadow(const ShadowData* shadow) { m_shadow = shadow; }
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void setShadowColorFilter(const FilterOperations* colorFilter) { m_shadowColorFilter = colorFilter; }
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void setFont(const FontCascade& font) { m_font = &font; }
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void setIsHorizontal(bool isHorizontal) { m_textBoxIsHorizontal = isHorizontal; }
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void setEmphasisMark(const AtomString& mark, float offset, const RenderCombineText*);
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void paint(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin);
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void paintRange(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin, unsigned start, unsigned end);
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template<typename LayoutRun>
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void setGlyphDisplayListIfNeeded(const LayoutRun& run, const PaintInfo& paintInfo, const FontCascade& font, GraphicsContext& context, const TextRun& textRun)
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{
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if (!TextPainter::shouldUseGlyphDisplayList(paintInfo))
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TextPainter::removeGlyphDisplayList(run);
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else
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m_glyphDisplayList = GlyphDisplayListCache<LayoutRun>::singleton().get(run, font, context, textRun);
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}
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template<typename LayoutRun>
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static void removeGlyphDisplayList(const LayoutRun& run) { GlyphDisplayListCache<LayoutRun>::singleton().remove(run); }
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static void clearGlyphDisplayLists();
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static bool shouldUseGlyphDisplayList(const PaintInfo&);
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private:
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void paintTextOrEmphasisMarks(const FontCascade&, const TextRun&, const AtomString& emphasisMark, float emphasisMarkOffset,
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const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset);
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void paintTextWithShadows(const ShadowData*, const FilterOperations*, const FontCascade&, const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin,
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unsigned startOffset, unsigned endOffset, const AtomString& emphasisMark, float emphasisMarkOffset, bool stroked);
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void paintTextAndEmphasisMarksIfNeeded(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset,
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const TextPaintStyle&, const ShadowData*, const FilterOperations*);
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GraphicsContext& m_context;
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const FontCascade* m_font { nullptr };
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TextPaintStyle m_style;
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AtomString m_emphasisMark;
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const ShadowData* m_shadow { nullptr };
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const FilterOperations* m_shadowColorFilter { nullptr };
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const RenderCombineText* m_combinedText { nullptr };
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DisplayList::DisplayList* m_glyphDisplayList { nullptr };
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float m_emphasisMarkOffset { 0 };
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bool m_textBoxIsHorizontal { true };
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};
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inline void TextPainter::setEmphasisMark(const AtomString& mark, float offset, const RenderCombineText* combinedText)
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{
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m_emphasisMark = mark;
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m_emphasisMarkOffset = offset;
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m_combinedText = combinedText;
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}
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class ShadowApplier {
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public:
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ShadowApplier(GraphicsContext&, const ShadowData*, const FilterOperations* colorFilter, const FloatRect& textRect, bool lastShadowIterationShouldDrawText = true, bool opaque = false, FontOrientation = FontOrientation::Horizontal);
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FloatSize extraOffset() const { return m_extraOffset; }
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bool nothingToDraw() const { return m_nothingToDraw; }
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bool didSaveContext() const { return m_didSaveContext; }
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~ShadowApplier();
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private:
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bool isLastShadowIteration();
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bool shadowIsCompletelyCoveredByText(bool textIsOpaque);
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FloatSize m_extraOffset;
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GraphicsContext& m_context;
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const ShadowData* m_shadow;
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bool m_onlyDrawsShadow : 1;
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bool m_avoidDrawingShadow : 1;
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bool m_nothingToDraw : 1;
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bool m_didSaveContext : 1;
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};
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} // namespace WebCore
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