Introduce GenericFontFamilySettings.

Source/platform/fonts/GenericFontFamilySettings.h

+/*
+ * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 GenericFontFamilySettings_h
+#define GenericFontFamilySettings_h
+
+#include "platform/PlatformExport.h"
+#include "wtf/HashMap.h"
+#include "wtf/text/AtomicString.h"
+#include "wtf/text/AtomicStringHash.h"
+
+
+namespace WebCore {
+
+class PLATFORM_EXPORT GenericFontFamilySettings {
+    WTF_MAKE_NONCOPYABLE(GenericFontFamilySettings); WTF_MAKE_FAST_ALLOCATED;
+
+public:
+    GenericFontFamilySettings()
+    {
+    }
+
+    void setStandard(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    const AtomicString& standard(UScriptCode = USCRIPT_COMMON) const;
+
+    void setFixed(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    const AtomicString& fixed(UScriptCode = USCRIPT_COMMON) const;
+
+    void setSerif(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    const AtomicString& serif(UScriptCode = USCRIPT_COMMON) const;
+
+    void setSansSerif(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    const AtomicString& sansSerif(UScriptCode = USCRIPT_COMMON) const;
+
+    void setCursive(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    const AtomicString& cursive(UScriptCode = USCRIPT_COMMON) const;
+
+    void setFantasy(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    const AtomicString& fantasy(UScriptCode = USCRIPT_COMMON) const;
+
+    void setPictograph(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    const AtomicString& pictograph(UScriptCode = USCRIPT_COMMON) const;
+
+    // Only called by InternalSettings to clear font family maps.
+    void reset();
+
+private:
+    // UScriptCode uses -1 and 0 for UScriptInvalidCode and UScriptCommon.
+    // We need to use -2 and -3 for empty value and deleted value.
+    struct UScriptCodeHashTraits : WTF::GenericHashTraits<int> {
+        static const bool emptyValueIsZero = false;
+        static int emptyValue() { return -2; }
+        static void constructDeletedValue(int& slot) { slot = -3; }
+        static bool isDeletedValue(int value) { return value == -3; }
+    };
+
+    typedef HashMap<int, AtomicString, DefaultHash<int>::Hash, UScriptCodeHashTraits> ScriptFontFamilyMap;
+
+    void setGenericFontFamilyMap(ScriptFontFamilyMap&, const AtomicString&, UScriptCode);
+    const AtomicString& genericFontFamilyForScript(const ScriptFontFamilyMap&, UScriptCode) const;
+
+    ScriptFontFamilyMap m_standardFontFamilyMap;
+    ScriptFontFamilyMap m_serifFontFamilyMap;
+    ScriptFontFamilyMap m_fixedFontFamilyMap;
+    ScriptFontFamilyMap m_sansSerifFontFamilyMap;
+    ScriptFontFamilyMap m_cursiveFontFamilyMap;
+    ScriptFontFamilyMap m_fantasyFontFamilyMap;
+    ScriptFontFamilyMap m_pictographFontFamilyMap;
+};
+
+}
+
+#endif