author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 24 Sep 2009 12:53:48 +0300 | |
changeset 11 | c8a366e56285 |
parent 1 | 7c90e6132015 |
permissions | -rw-r--r-- |
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/* |
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* This file is part of the html renderer for KDE. |
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* |
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* Copyright (C) 2000 Lars Knoll (knoll@kde.org) |
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* (C) 2000 Antti Koivisto (koivisto@kde.org) |
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* (C) 2000 Dirk Mueller (mueller@kde.org) |
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* Copyright (C) 2003, 2006 Apple Computer, Inc. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#ifndef Font_h |
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#define Font_h |
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#include "FontDescription.h" |
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#include <wtf/HashMap.h> |
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#if PLATFORM(QT) |
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#include <QtGui/qfont.h> |
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#include <QtGui/qfontmetrics.h> |
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#endif |
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namespace WebCore { |
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class FloatPoint; |
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class FloatRect; |
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class FontData; |
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class FontFallbackList; |
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class FontPlatformData; |
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class GlyphBuffer; |
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class GlyphPageTreeNode; |
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class GraphicsContext; |
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class IntPoint; |
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class TextStyle; |
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struct GlyphData; |
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class TextRun { |
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public: |
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TextRun(const UChar* c, int len) |
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:m_characters(c), m_len(len) |
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{} |
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TextRun(const String& s) |
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:m_characters(s.characters()), m_len(s.length()) |
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{} |
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const UChar operator[](int i) const { return m_characters[i]; } |
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const UChar* data(int i) const { return &m_characters[i]; } |
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const UChar* characters() const { return m_characters; } |
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int length() const { return m_len; } |
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private: |
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const UChar* m_characters; |
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int m_len; |
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}; |
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class Font { |
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public: |
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Font(); |
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Font(const FontDescription&, short letterSpacing, short wordSpacing); |
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#if !PLATFORM(QT) |
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Font(const FontPlatformData&, bool isPrinting); // This constructor is only used if the platform wants to start with a native font. |
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#endif |
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~Font(); |
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Font(const Font&); |
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Font& operator=(const Font&); |
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bool operator==(const Font& other) const |
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{ |
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// Our FontData doesn't have to be checked, since checking the font description will be fine. |
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// FIXME: This does not work if the font was made with the FontPlatformData constructor. |
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return m_fontDescription == other.m_fontDescription |
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&& m_letterSpacing == other.m_letterSpacing |
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&& m_wordSpacing == other.m_wordSpacing; |
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} |
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bool operator!=(const Font& other) const { |
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return !(*this == other); |
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} |
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const FontDescription& fontDescription() const { return m_fontDescription; } |
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int pixelSize() const { return fontDescription().computedPixelSize(); } |
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float size() const { return fontDescription().computedSize(); } |
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void update() const; |
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void drawText(GraphicsContext*, const TextRun&, const TextStyle&, const FloatPoint&, int from = 0, int to = -1) const; |
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int width(const TextRun&, const TextStyle&) const; |
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int width(const TextRun&) const; |
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float floatWidth(const TextRun&, const TextStyle&) const; |
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float floatWidth(const TextRun&) const; |
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int offsetForPosition(const TextRun&, const TextStyle&, int position, bool includePartialGlyphs) const; |
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FloatRect selectionRectForText(const TextRun&, const TextStyle&, const IntPoint&, int h, int from = 0, int to = -1) const; |
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bool isSmallCaps() const { return m_fontDescription.smallCaps(); } |
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short wordSpacing() const { return m_wordSpacing; } |
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short letterSpacing() const { return m_letterSpacing; } |
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void setWordSpacing(short s) { m_wordSpacing = s; } |
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void setLetterSpacing(short s) { m_letterSpacing = s; } |
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bool isFixedPitch() const; |
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bool isPrinterFont() const { return m_fontDescription.usePrinterFont(); } |
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FontFamily& firstFamily() { return m_fontDescription.firstFamily(); } |
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const FontFamily& family() const { return m_fontDescription.family(); } |
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bool italic() const { return m_fontDescription.italic(); } |
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unsigned weight() const { return m_fontDescription.weight(); } |
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bool bold() const { return m_fontDescription.bold(); } |
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#if !PLATFORM(QT) |
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bool isPlatformFont() const { return m_isPlatformFont; } |
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#endif |
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#if PLATFORM(QT) |
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inline const QFont &font() const { return m_font; } |
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inline const QFont &scFont() const { return m_scFont; } |
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#endif |
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// Metrics that we query the FontFallbackList for. |
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int ascent() const; |
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int descent() const; |
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int height() const { return ascent() + descent(); } |
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int lineSpacing() const; |
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float xHeight() const; |
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int spaceWidth() const; |
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int tabWidth() const { return 8 * spaceWidth(); } |
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#if !PLATFORM(QT) |
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const FontData* primaryFont() const; |
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const FontData* fontDataAt(unsigned) const; |
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const GlyphData& glyphDataForCharacter(UChar32, const UChar* cluster, unsigned clusterLength, bool mirror, bool attemptFontSubstitution) const; |
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// Used for complex text, and does not utilize the glyph map cache. |
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const FontData* fontDataForCharacters(const UChar*, int length) const; |
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private: |
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bool canUseGlyphCache(const TextRun&) const; |
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void drawSimpleText(GraphicsContext*, const TextRun&, const TextStyle&, const FloatPoint&, int from, int to) const; |
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void drawGlyphs(GraphicsContext*, const FontData*, const GlyphBuffer&, int from, int to, const FloatPoint&) const; |
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void drawGlyphBuffer(GraphicsContext*, const GlyphBuffer&, const TextRun&, const TextStyle&, const FloatPoint&) const; |
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void drawComplexText(GraphicsContext*, const TextRun&, const TextStyle&, const FloatPoint&, int from, int to) const; |
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float floatWidthForSimpleText(const TextRun&, const TextStyle&, GlyphBuffer*) const; |
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float floatWidthForComplexText(const TextRun&, const TextStyle&) const; |
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int offsetForPositionForSimpleText(const TextRun&, const TextStyle&, int position, bool includePartialGlyphs) const; |
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int offsetForPositionForComplexText(const TextRun&, const TextStyle&, int position, bool includePartialGlyphs) const; |
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FloatRect selectionRectForSimpleText(const TextRun&, const TextStyle&, const IntPoint&, int h, int from, int to) const; |
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FloatRect selectionRectForComplexText(const TextRun&, const TextStyle&, const IntPoint&, int h, int from, int to) const; |
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#endif |
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friend struct WidthIterator; |
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// Useful for debugging the different font rendering code paths. |
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public: |
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#if !PLATFORM(QT) |
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enum CodePath { Auto, Simple, Complex }; |
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static void setCodePath(CodePath); |
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static CodePath codePath; |
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static const uint8_t gRoundingHackCharacterTable[256]; |
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static bool isRoundingHackCharacter(UChar32 c) |
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{ |
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return (((c & ~0xFF) == 0 && gRoundingHackCharacterTable[c])); |
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} |
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#endif |
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static bool treatAsSpace(UChar c) { return c == ' ' || c == '\t' || c == '\n' || c == 0x00A0; } |
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static bool treatAsZeroWidthSpace(UChar c) { return c < 0x20 || (c >= 0x7F && c < 0xA0) || c == 0x200e || c == 0x200f || c == 0x200b; } |
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private: |
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FontDescription m_fontDescription; |
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#if !PLATFORM(QT) |
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mutable RefPtr<FontFallbackList> m_fontList; |
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mutable HashMap<int, GlyphPageTreeNode*> m_pages; |
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mutable GlyphPageTreeNode* m_pageZero; |
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#endif |
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short m_letterSpacing; |
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short m_wordSpacing; |
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#if !PLATFORM(QT) |
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bool m_isPlatformFont; |
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#else |
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QFont m_font; |
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QFont m_scFont; |
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int m_spaceWidth; |
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#endif |
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}; |
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} |
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#endif |