#ifndef Font_h
#define Font_h
#include "platform/PlatformExport.h"
#include "platform/fonts/FontDescription.h"
#include "platform/fonts/FontFallbackList.h"
#include "platform/fonts/SimpleFontData.h"
#include "platform/text/TextDirection.h"
#include "platform/text/TextPath.h"
#include "wtf/HashMap.h"
#include "wtf/HashSet.h"
#include "wtf/MathExtras.h"
#include "wtf/unicode/CharacterNames.h"
#ifdef Complex
#undef Complex
#endif
namespace WebCore {
class FloatPoint;
class FloatRect;
class FontData;
class FontMetrics;
class FontPlatformData;
class FontSelector;
class GlyphBuffer;
class GraphicsContext;
class TextRun;
struct TextRunPaintInfo;
struct GlyphData;
struct GlyphOverflow {
GlyphOverflow()
: left(0)
, right(0)
, top(0)
, bottom(0)
, computeBounds(false)
{
}
int left;
int right;
int top;
int bottom;
bool computeBounds;
};
class PLATFORM_EXPORT Font {
public:
Font();
Font(const FontDescription&);
~Font();
Font(const Font&);
Font& operator=(const Font&);
bool operator==(const Font& other) const;
bool operator!=(const Font& other) const { return !(*this == other); }
const FontDescription& fontDescription() const { return m_fontDescription; }
void update(PassRefPtr<FontSelector>) const;
enum CustomFontNotReadyAction { DoNotPaintIfFontNotReady, UseFallbackIfFontNotReady };
void drawText(GraphicsContext*, const TextRunPaintInfo&, const FloatPoint&, CustomFontNotReadyAction = DoNotPaintIfFontNotReady) const;
void drawEmphasisMarks(GraphicsContext*, const TextRunPaintInfo&, const AtomicString& mark, const FloatPoint&) const;
float width(const TextRun&, HashSet<const SimpleFontData*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
float width(const TextRun&, int& charsConsumed, Glyph& glyphId) const;
int offsetForPosition(const TextRun&, float position, bool includePartialGlyphs) const;
FloatRect selectionRectForText(const TextRun&, const FloatPoint&, int h, int from = 0, int to = -1, bool accountForGlyphBounds = false) const;
bool isFixedPitch() const;
const FontMetrics& fontMetrics() const { return primaryFont()->fontMetrics(); }
float spaceWidth() const { return primaryFont()->spaceWidth() + fontDescription().letterSpacing(); }
float tabWidth(const SimpleFontData&, unsigned tabSize, float position) const;
float tabWidth(unsigned tabSize, float position) const { return tabWidth(*primaryFont(), tabSize, position); }
int emphasisMarkAscent(const AtomicString&) const;
int emphasisMarkDescent(const AtomicString&) const;
int emphasisMarkHeight(const AtomicString&) const;
const SimpleFontData* primaryFont() const;
const FontData* fontDataAt(unsigned) const;
inline GlyphData glyphDataForCharacter(UChar32 c, bool mirror, FontDataVariant variant = AutoVariant) const
{
return glyphDataAndPageForCharacter(c, mirror, variant).first;
}
#if OS(MACOSX)
const SimpleFontData* fontDataForCombiningCharacterSequence(const UChar*, size_t length, FontDataVariant) const;
#endif
std::pair<GlyphData, GlyphPage*> glyphDataAndPageForCharacter(UChar32, bool mirror, FontDataVariant = AutoVariant) const;
bool primaryFontHasGlyphForCharacter(UChar32) const;
CodePath codePath(const TextRun&) const;
private:
enum ForTextEmphasisOrNot { NotForTextEmphasis, ForTextEmphasis };
float getGlyphsAndAdvancesForSimpleText(const TextRun&, int from, int to, GlyphBuffer&, ForTextEmphasisOrNot = NotForTextEmphasis) const;
void drawSimpleText(GraphicsContext*, const TextRunPaintInfo&, const FloatPoint&) const;
void drawEmphasisMarksForSimpleText(GraphicsContext*, const TextRunPaintInfo&, const AtomicString& mark, const FloatPoint&) const;
void drawGlyphs(GraphicsContext*, const SimpleFontData*, const GlyphBuffer&, unsigned from, unsigned numGlyphs, const FloatPoint&, const FloatRect& textRect) const;
void drawGlyphBuffer(GraphicsContext*, const TextRunPaintInfo&, const GlyphBuffer&, const FloatPoint&) const;
void drawEmphasisMarks(GraphicsContext*, const TextRunPaintInfo&, const GlyphBuffer&, const AtomicString&, const FloatPoint&) const;
float floatWidthForSimpleText(const TextRun&, HashSet<const SimpleFontData*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
int offsetForPositionForSimpleText(const TextRun&, float position, bool includePartialGlyphs) const;
FloatRect selectionRectForSimpleText(const TextRun&, const FloatPoint&, int h, int from, int to, bool accountForGlyphBounds) const;
bool getEmphasisMarkGlyphData(const AtomicString&, GlyphData&) const;
float getGlyphsAndAdvancesForComplexText(const TextRun&, int from, int to, GlyphBuffer&, ForTextEmphasisOrNot = NotForTextEmphasis) const;
void drawComplexText(GraphicsContext*, const TextRunPaintInfo&, const FloatPoint&) const;
void drawEmphasisMarksForComplexText(GraphicsContext*, const TextRunPaintInfo&, const AtomicString& mark, const FloatPoint&) const;
float floatWidthForComplexText(const TextRun&, HashSet<const SimpleFontData*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
int offsetForPositionForComplexText(const TextRun&, float position, bool includePartialGlyphs) const;
FloatRect selectionRectForComplexText(const TextRun&, const FloatPoint&, int h, int from, int to) const;
friend struct WidthIterator;
friend class SVGTextRunRenderingContext;
public:
static void setCodePath(CodePath);
static CodePath codePath();
static CodePath s_codePath;
FontSelector* fontSelector() const;
FontFallbackList* fontList() const { return m_fontFallbackList.get(); }
void willUseFontData() const;
private:
bool loadingCustomFonts() const
{
return m_fontFallbackList && m_fontFallbackList->loadingCustomFonts();
}
bool shouldSkipDrawing() const
{
return m_fontFallbackList && m_fontFallbackList->shouldSkipDrawing();
}
FontDescription m_fontDescription;
mutable RefPtr<FontFallbackList> m_fontFallbackList;
};
inline Font::~Font()
{
}
inline const SimpleFontData* Font::primaryFont() const
{
ASSERT(m_fontFallbackList);
return m_fontFallbackList->primarySimpleFontData(m_fontDescription);
}
inline const FontData* Font::fontDataAt(unsigned index) const
{
ASSERT(m_fontFallbackList);
return m_fontFallbackList->fontDataAt(m_fontDescription, index);
}
inline bool Font::isFixedPitch() const
{
ASSERT(m_fontFallbackList);
return m_fontFallbackList->isFixedPitch(m_fontDescription);
}
inline FontSelector* Font::fontSelector() const
{
return m_fontFallbackList ? m_fontFallbackList->fontSelector() : 0;
}
inline float Font::tabWidth(const SimpleFontData& fontData, unsigned tabSize, float position) const
{
if (!tabSize)
return fontDescription().letterSpacing();
float tabWidth = tabSize * fontData.spaceWidth() + fontDescription().letterSpacing();
return tabWidth - fmodf(position, tabWidth);
}
}
#endif