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+/*
+ * Copyright (C) 2006, 2008 Apple Computer, Inc. All rights reserved.
+ * Copyright (C) 2007-2008 Torch Mobile, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * its contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef FontCache_h
+#define FontCache_h
+
+#include <limits.h>
+#include <wtf/Forward.h>
+#include <wtf/Vector.h>
+#include <wtf/unicode/Unicode.h>
+
+#if PLATFORM(WIN)
+#include <objidl.h>
+#include <mlang.h>
+#endif
+
+namespace WebCore
+{
+
+class Font;
+class FontPlatformData;
+class FontData;
+class FontDescription;
+class FontSelector;
+class SimpleFontData;
+
+class FontCache : public Noncopyable {
+public:
+ friend FontCache* fontCache();
+
+ const FontData* getFontData(const Font&, int& familyIndex, FontSelector*);
+ void releaseFontData(const SimpleFontData*);
+
+ // This method is implemented by the platform.
+ // FIXME: Font data returned by this method never go inactive because callers don't track and release them.
+ const SimpleFontData* getFontDataForCharacters(const Font&, const UChar* characters, int length);
+
+ // Also implemented by the platform.
+ void platformInit();
+
+#if OS(WINCE) && !PLATFORM(QT)
+#if defined(IMLANG_FONT_LINK) && (IMLANG_FONT_LINK == 2)
+ IMLangFontLink2* getFontLinkInterface();
+#else
+ IMLangFontLink* getFontLinkInterface();
+#endif
+ static void comInitialize();
+ static void comUninitialize();
+ static IMultiLanguage* getMultiLanguageInterface();
+#elif PLATFORM(WIN)
+ IMLangFontLink2* getFontLinkInterface();
+#endif
+
+ void getTraitsInFamily(const AtomicString&, Vector<unsigned>&);
+
+ SimpleFontData* getCachedFontData(const FontDescription& fontDescription, const AtomicString& family, bool checkingAlternateName = false);
+ SimpleFontData* getLastResortFallbackFont(const FontDescription&);
+
+ void addClient(FontSelector*);
+ void removeClient(FontSelector*);
+
+ unsigned generation();
+ void invalidate();
+
+ size_t fontDataCount();
+ size_t inactiveFontDataCount();
+ void purgeInactiveFontData(int count = INT_MAX);
+
+private:
+ FontCache();
+ ~FontCache();
+
+ // FIXME: This method should eventually be removed.
+ FontPlatformData* getCachedFontPlatformData(const FontDescription&, const AtomicString& family, bool checkingAlternateName = false);
+
+ // These methods are implemented by each platform.
+ SimpleFontData* getSimilarFontPlatformData(const Font&);
+ FontPlatformData* createFontPlatformData(const FontDescription&, const AtomicString& family);
+
+ SimpleFontData* getCachedFontData(const FontPlatformData*);
+
+ friend class SimpleFontData; // For getCachedFontData(const FontPlatformData*)
+ friend class FontFallbackList;
+};
+
+// Get the global fontCache.
+FontCache* fontCache();
+
+}
+
+#endif