--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/platform/Font.h	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,207 @@
+/*
+ * 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 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 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); // 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
+    {
+        // Our FontData doesn't have to be checked, since checking the font description will be fine.
+        // FIXME: This does not work if the font was made with the FontPlatformData constructor.
+        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
+    
+    // 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;
+    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;
+    // 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 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;
+    
+    // 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])); 
+    }
+#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