SVGTextMetricsBuilder.h [plain text]
#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(RenderSVGInlineText&);
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*);
void measureTextRenderer(RenderSVGInlineText&, MeasureTextData*);
RenderSVGInlineText* m_text;
TextRun m_run;
unsigned m_textPosition;
bool m_isComplexText;
SVGTextMetrics m_currentMetrics;
float m_totalWidth;
std::unique_ptr<WidthIterator> m_simpleWidthIterator;
SVGTextMetrics m_complexStartToCurrentMetrics;
};
}