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/*
* Copyright (C) Research In Motion Limited 2010-2012. 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 "SVGTextLayoutAttributes.h"
#include "TextRun.h"
#include "WidthIterator.h"
namespace WebCore {
class RenderElement;
class RenderSVGInlineText;
class RenderSVGText;
struct MeasureTextData;
class SVGTextMetricsBuilder {
WTF_MAKE_NONCOPYABLE(SVGTextMetricsBuilder);
public:
SVGTextMetricsBuilder();
void measureTextRenderer(RenderSVGText&, RenderSVGInlineText* stopAtLeaf);
void buildMetricsAndLayoutAttributes(RenderSVGText&, RenderSVGInlineText* stopAtLeaf, SVGCharacterDataMap& allCharactersMap);
private:
bool advance();
void advanceSimpleText();
void advanceComplexText();
bool currentCharacterStartsSurrogatePair() const;
void initializeMeasurementWithTextRenderer(RenderSVGInlineText&);
void walkTree(RenderElement&, RenderSVGInlineText* stopAtLeaf, MeasureTextData&);
std::tuple<unsigned, UChar> measureTextRenderer(RenderSVGInlineText&, const MeasureTextData&, std::tuple<unsigned, UChar>);
SingleThreadWeakPtr<RenderSVGInlineText> m_text;
TextRun m_run;
unsigned m_textPosition;
bool m_isComplexText { false };
bool m_canUseSimplifiedTextMeasuring { false };
SVGTextMetrics m_currentMetrics;
float m_totalWidth;
// Simple text only.
std::unique_ptr<WidthIterator> m_simpleWidthIterator;
// Complex text only.
SVGTextMetrics m_complexStartToCurrentMetrics;
};
} // namespace WebCore
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