#ifndef Font_h
#define Font_h
#include "FontDescription.h"
#include <wtf/HashMap.h>
#if PLATFORM(QT)
#include <QtGui/qfont.h>
#include <QtGui/qfontmetrics.h>
#endif
namespace WebCore {
class FloatPoint;
class FloatRect;
class FontData;
class FontFallbackList;
class FontPlatformData;
class GlyphBuffer;
class GlyphPageTreeNode;
class GraphicsContext;
class IntPoint;
class TextStyle;
struct GlyphData;
class TextRun {
public:
TextRun(const UChar* c, int len)
:m_characters(c), m_len(len)
{}
TextRun(const String& s)
:m_characters(s.characters()), m_len(s.length())
{}
const UChar operator[](int i) const { return m_characters[i]; }
const UChar* data(int i) const { return &m_characters[i]; }
const UChar* characters() const { return m_characters; }
int length() const { return m_len; }
private:
const UChar* m_characters;
int m_len;
};
class Font {
public:
Font();
Font(const FontDescription&, short letterSpacing, short wordSpacing);
#if !PLATFORM(QT)
Font(const FontPlatformData&, bool isPrinting); #endif
~Font();
Font(const Font&);
Font& operator=(const Font&);
bool operator==(const Font& other) const
{
return m_fontDescription == other.m_fontDescription
&& m_letterSpacing == other.m_letterSpacing
&& m_wordSpacing == other.m_wordSpacing;
}
bool operator!=(const Font& other) const {
return !(*this == other);
}
const FontDescription& fontDescription() const { return m_fontDescription; }
int pixelSize() const { return fontDescription().computedPixelSize(); }
float size() const { return fontDescription().computedSize(); }
void update() const;
void drawText(GraphicsContext*, const TextRun&, const TextStyle&, const FloatPoint&, int from = 0, int to = -1) const;
int width(const TextRun&, const TextStyle&) const;
int width(const TextRun&) const;
float floatWidth(const TextRun&, const TextStyle&) const;
float floatWidth(const TextRun&) const;
int offsetForPosition(const TextRun&, const TextStyle&, int position, bool includePartialGlyphs) const;
FloatRect selectionRectForText(const TextRun&, const TextStyle&, const IntPoint&, int h, int from = 0, int to = -1) const;
bool isSmallCaps() const { return m_fontDescription.smallCaps(); }
short wordSpacing() const { return m_wordSpacing; }
short letterSpacing() const { return m_letterSpacing; }
void setWordSpacing(short s) { m_wordSpacing = s; }
void setLetterSpacing(short s) { m_letterSpacing = s; }
bool isFixedPitch() const;
bool isPrinterFont() const { return m_fontDescription.usePrinterFont(); }
FontFamily& firstFamily() { return m_fontDescription.firstFamily(); }
const FontFamily& family() const { return m_fontDescription.family(); }
bool italic() const { return m_fontDescription.italic(); }
unsigned weight() const { return m_fontDescription.weight(); }
bool bold() const { return m_fontDescription.bold(); }
#if !PLATFORM(QT)
bool isPlatformFont() const { return m_isPlatformFont; }
#endif
#if PLATFORM(QT)
inline const QFont &font() const { return m_font; }
inline const QFont &scFont() const { return m_scFont; }
#endif
int ascent() const;
int descent() const;
int height() const { return ascent() + descent(); }
int lineSpacing() const;
float xHeight() const;
int spaceWidth() const;
int tabWidth() const { return 8 * spaceWidth(); }
#if !PLATFORM(QT)
const FontData* primaryFont() const;
const FontData* fontDataAt(unsigned) const;
const GlyphData& glyphDataForCharacter(UChar32, const UChar* cluster, unsigned clusterLength, bool mirror, bool attemptFontSubstitution) const;
const FontData* fontDataForCharacters(const UChar*, int length) const;
private:
bool canUseGlyphCache(const TextRun&) const;
void drawSimpleText(GraphicsContext*, const TextRun&, const TextStyle&, const FloatPoint&, int from, int to) const;
void drawGlyphs(GraphicsContext*, const FontData*, const GlyphBuffer&, int from, int to, const FloatPoint&) const;
void drawGlyphBuffer(GraphicsContext*, const GlyphBuffer&, const TextRun&, const TextStyle&, const FloatPoint&) const;
void drawComplexText(GraphicsContext*, const TextRun&, const TextStyle&, const FloatPoint&, int from, int to) const;
float floatWidthForSimpleText(const TextRun&, const TextStyle&, GlyphBuffer*) const;
float floatWidthForComplexText(const TextRun&, const TextStyle&) const;
int offsetForPositionForSimpleText(const TextRun&, const TextStyle&, int position, bool includePartialGlyphs) const;
int offsetForPositionForComplexText(const TextRun&, const TextStyle&, int position, bool includePartialGlyphs) const;
FloatRect selectionRectForSimpleText(const TextRun&, const TextStyle&, const IntPoint&, int h, int from, int to) const;
FloatRect selectionRectForComplexText(const TextRun&, const TextStyle&, const IntPoint&, int h, int from, int to) const;
#endif
friend struct WidthIterator;
public:
#if !PLATFORM(QT)
enum CodePath { Auto, Simple, Complex };
static void setCodePath(CodePath);
static CodePath codePath;
static const uint8_t gRoundingHackCharacterTable[256];
static bool isRoundingHackCharacter(UChar32 c)
{
return (((c & ~0xFF) == 0 && gRoundingHackCharacterTable[c]));
}
#endif
static bool treatAsSpace(UChar c) { return c == ' ' || c == '\t' || c == '\n' || c == 0x00A0; }
static bool treatAsZeroWidthSpace(UChar c) { return c < 0x20 || (c >= 0x7F && c < 0xA0) || c == 0x200e || c == 0x200f; }
private:
FontDescription m_fontDescription;
#if !PLATFORM(QT)
mutable RefPtr<FontFallbackList> m_fontList;
mutable HashMap<int, GlyphPageTreeNode*> m_pages;
mutable GlyphPageTreeNode* m_pageZero;
#endif
short m_letterSpacing;
short m_wordSpacing;
#if !PLATFORM(QT)
bool m_isPlatformFont;
#else
QFont m_font;
QFont m_scFont;
int m_spaceWidth;
#endif
};
}
#endif