blob: 0ea04eb4ff171b806d745699611fa3aa12a7e167 [file] [log] [blame]
/*
* This file is part of the html renderer for KDE.
*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* (C) 2000 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2006, 2007 Apple Computer, Inc.
*
* 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.
*
*/
#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 FontSelector;
class GlyphBuffer;
class GlyphPageTreeNode;
class GraphicsContext;
class IntPoint;
class RenderObject;
class SimpleFontData;
class SVGPaintServer;
struct GlyphData;
class TextRun {
public:
TextRun(const UChar* c, int len, bool allowTabs = false, int xpos = 0, int padding = 0, bool rtl = false, bool directionalOverride = false,
bool applyRunRounding = true, bool applyWordRounding = true)
: m_characters(c)
, m_len(len)
, m_allowTabs(allowTabs)
, m_xpos(xpos)
, m_padding(padding)
, m_rtl(rtl)
, m_directionalOverride(directionalOverride)
, m_applyRunRounding(applyRunRounding)
, m_applyWordRounding(applyWordRounding)
, m_disableSpacing(false)
#if ENABLE(SVG_FONTS)
, m_referencingRenderObject(0)
, m_activePaintServer(0)
#endif
{
}
TextRun(const String& s, bool allowTabs = false, int xpos = 0, int padding = 0, bool rtl = false, bool directionalOverride = false,
bool applyRunRounding = true, bool applyWordRounding = true)
: m_characters(s.characters())
, m_len(s.length())
, m_allowTabs(allowTabs)
, m_xpos(xpos)
, m_padding(padding)
, m_rtl(rtl)
, m_directionalOverride(directionalOverride)
, m_applyRunRounding(applyRunRounding)
, m_applyWordRounding(applyWordRounding)
, m_disableSpacing(false)
#if ENABLE(SVG_FONTS)
, m_referencingRenderObject(0)
, m_activePaintServer(0)
#endif
{
}
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; }
void setText(const UChar* c, int len) { m_characters = c; m_len = len; }
bool allowTabs() const { return m_allowTabs; }
int xPos() const { return m_xpos; }
int padding() const { return m_padding; }
bool rtl() const { return m_rtl; }
bool ltr() const { return !m_rtl; }
bool directionalOverride() const { return m_directionalOverride; }
bool applyRunRounding() const { return m_applyRunRounding; }
bool applyWordRounding() const { return m_applyWordRounding; }
bool spacingDisabled() const { return m_disableSpacing; }
void disableSpacing() { m_disableSpacing = true; }
void disableRoundingHacks() { m_applyRunRounding = m_applyWordRounding = false; }
void setRTL(bool b) { m_rtl = b; }
void setDirectionalOverride(bool override) { m_directionalOverride = override; }
#if ENABLE(SVG_FONTS)
RenderObject* referencingRenderObject() const { return m_referencingRenderObject; }
void setReferencingRenderObject(RenderObject* object) { m_referencingRenderObject = object; }
SVGPaintServer* activePaintServer() const { return m_activePaintServer; }
void setActivePaintServer(SVGPaintServer* object) { m_activePaintServer = object; }
#endif
private:
const UChar* m_characters;
int m_len;
bool m_allowTabs;
int m_xpos;
int m_padding;
bool m_rtl;
bool m_directionalOverride;
bool m_applyRunRounding;
bool m_applyWordRounding;
bool m_disableSpacing;
#if ENABLE(SVG_FONTS)
RenderObject* m_referencingRenderObject;
SVGPaintServer* m_activePaintServer;
#endif
};
class Font {
public:
Font();
Font(const FontDescription&, short letterSpacing, short wordSpacing);
#if !PLATFORM(QT)
Font(const FontPlatformData&, bool isPrinting); // This constructor is only used if the platform wants to start with a native font.
#endif
~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; }
int pixelSize() const { return fontDescription().computedPixelSize(); }
float size() const { return fontDescription().computedSize(); }
void update(PassRefPtr<FontSelector>) const;
void drawText(GraphicsContext*, const TextRun&, const FloatPoint&, int from = 0, int to = -1) const;
int width(const TextRun&) const;
float floatWidth(const TextRun&) const;
int offsetForPosition(const TextRun&, int position, bool includePartialGlyphs) const;
FloatRect selectionRectForText(const TextRun&, 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; }
#if !PLATFORM(QT)
void setWordSpacing(short s) { m_wordSpacing = s; }
void setLetterSpacing(short s) { m_letterSpacing = s; }
#else
void setWordSpacing(short s);
void setLetterSpacing(short s);
#endif
bool isFixedPitch() const;
bool isPrinterFont() const { return m_fontDescription.usePrinterFont(); }
FontRenderingMode renderingMode() const { return m_fontDescription.renderingMode(); }
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
// Metrics that we query the FontFallbackList for.
int ascent() const;
int descent() const;
int height() const { return ascent() + descent(); }
int lineSpacing() const;
float xHeight() const;
unsigned unitsPerEm() const;
int spaceWidth() const;
int tabWidth() const { return 8 * spaceWidth(); }
#if !PLATFORM(QT)
const SimpleFontData* primaryFont() const {
if (!m_cachedPrimaryFont)
cachePrimaryFont();
return m_cachedPrimaryFont;
}
const FontData* fontDataAt(unsigned) const;
const GlyphData& glyphDataForCharacter(UChar32, bool mirror, bool forceSmallCaps = false) const;
// Used for complex text, and does not utilize the glyph map cache.
const FontData* fontDataForCharacters(const UChar*, int length) const;
private:
bool canUseGlyphCache(const TextRun&) const;
void drawSimpleText(GraphicsContext*, const TextRun&, const FloatPoint&, int from, int to) const;
#if ENABLE(SVG_FONTS)
void drawTextUsingSVGFont(GraphicsContext*, const TextRun&, const FloatPoint&, int from, int to) const;
float floatWidthUsingSVGFont(const TextRun&) const;
FloatRect selectionRectForTextUsingSVGFont(const TextRun&, const IntPoint&, int h, int from, int to) const;
int offsetForPositionForTextUsingSVGFont(const TextRun&, int position, bool includePartialGlyphs) const;
#endif
void drawGlyphs(GraphicsContext*, const SimpleFontData*, const GlyphBuffer&, int from, int to, const FloatPoint&) const;
void drawGlyphBuffer(GraphicsContext*, const GlyphBuffer&, const TextRun&, const FloatPoint&) const;
void drawComplexText(GraphicsContext*, const TextRun&, const FloatPoint&, int from, int to) const;
float floatWidthForSimpleText(const TextRun&, GlyphBuffer*) const;
float floatWidthForComplexText(const TextRun&) const;
int offsetForPositionForSimpleText(const TextRun&, int position, bool includePartialGlyphs) const;
int offsetForPositionForComplexText(const TextRun&, int position, bool includePartialGlyphs) const;
FloatRect selectionRectForSimpleText(const TextRun&, const IntPoint&, int h, int from, int to) const;
FloatRect selectionRectForComplexText(const TextRun&, const IntPoint&, int h, int from, int to) const;
void cachePrimaryFont() const;
#endif
friend struct WidthIterator;
// Useful for debugging the different font rendering code paths.
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]));
}
FontSelector* fontSelector() const;
#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 || c >= 0x202a && c <= 0x202e; }
private:
FontDescription m_fontDescription;
#if !PLATFORM(QT)
mutable RefPtr<FontFallbackList> m_fontList;
mutable HashMap<int, GlyphPageTreeNode*> m_pages;
mutable GlyphPageTreeNode* m_pageZero;
mutable const SimpleFontData* m_cachedPrimaryFont;
#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