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+/*
+ * 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 "TextRun.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 SimpleFontData;
+class SVGFontElement;
+
+struct GlyphData;
+
+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;
+ float floatWidth(const TextRun& run, int extraCharsAvailable, int& charsConsumed, String& glyphName) 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(); }
+ FontWeight weight() const { return m_fontDescription.weight(); }
+
+#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;
+ int lineGap() 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;
+ float floatWidthUsingSVGFont(const TextRun&, int extraCharsAvailable, int& charsConsumed, String& glyphName) 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;
+
+public:
+#if PLATFORM(QT)
+ FontSelector* fontSelector() const { return 0; }
+#else
+ // Useful for debugging the different font rendering code paths.
+ enum CodePath { Auto, Simple, Complex };
+ static void setCodePath(CodePath);
+ static CodePath codePath();
+ static CodePath s_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) || c == 0xFFFC; }
+
+#if ENABLE(SVG_FONTS)
+ bool isSVGFont() const;
+ SVGFontElement* svgFont() const;
+#endif
+
+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
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