Add LayoutLocale class

third_party/WebKit/Source/platform/fonts/win/FontFallbackWin.cpp

 /*
  * Copyright (c) 2006, 2007, 2008, 2009, 2010, 2012 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:
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  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 300 matching lines @@
     // this ICU locale tells the current UI locale of Chrome.
     UScriptCode hanScript = scriptCodeForHanFromLocale(
         icu::Locale::getDefault().getName(), '_');
     // For other locales, use the simplified Chinese font for Han.
     const UChar* localeFamily = scriptFontMap[hanScript == USCRIPT_COMMON
         ? USCRIPT_SIMPLIFIED_HAN : hanScript];
     if (localeFamily)
         scriptFontMap[USCRIPT_HAN] = localeFamily;
 }
 
-static UScriptCode scriptForHan(UScriptCode contentScript,
-    const AtomicString& contentLocale)
+static UScriptCode scriptForHan(const LayoutLocale& contentLocale)
 {
-    UScriptCode script = scriptCodeForHanFromLocale(contentScript, contentLocale);
-    if (script != USCRIPT_COMMON)
+    UScriptCode script = contentLocale.scriptForHan();
+    if (script != USCRIPT_HAN)
         return script;
     script = AcceptLanguagesResolver::preferredHanScript();
     if (script != USCRIPT_COMMON)
         return script;
     // Use UI locale. See initializeScriptFontMap().
     return USCRIPT_HAN;
 }
 
 // There are a lot of characters in USCRIPT_COMMON that can be covered
 // by fonts for scripts closely related to them. See
@@ skipping 138 matching lines @@
 // FIXME:
 //  - Handle 'Inherited', 'Common' and 'Unknown'
 //    (see http://www.unicode.org/reports/tr24/#Usage_Model )
 //    For 'Inherited' and 'Common', perhaps we need to
 //    accept another parameter indicating the previous family
 //    and just return it.
 //  - All the characters (or characters up to the point a single
 //    font can cover) need to be taken into account
 const UChar* getFallbackFamily(UChar32 character,
     FontDescription::GenericFamilyType generic,
-    UScriptCode contentScript,
-    const AtomicString& contentLocale,
+    const LayoutLocale& contentLocale,
     UScriptCode* scriptChecked,
     FontFallbackPriority fallbackPriority,
     SkFontMgr* fontManager)
 {
     ASSERT(character);
     ASSERT(fontManager);
     UBlockCode block = fallbackPriority == FontFallbackPriority::EmojiEmoji ?
         UBLOCK_EMOTICONS : ublock_getCode(character);
     const UChar* family = getFontBasedOnUnicodeBlock(block, fontManager);
     if (family) {
@@ skipping 10 matching lines @@
     // they're fully covered by Chinese, Japanese and Korean fonts.
     if (0xFF00 < character && character < 0xFF5F)
         script = USCRIPT_HAN;
 
     if (script == USCRIPT_COMMON)
         script = getScriptBasedOnUnicodeBlock(character);
 
     // For unified-Han scripts, try the lang attribute, system, or
     // accept-languages.
     if (script == USCRIPT_HAN)
-        script = scriptForHan(contentScript, contentLocale);
+        script = scriptForHan(contentLocale);
 
     family = getFontFamilyForScript(script, generic, fontManager);
     // Another lame work-around to cover non-BMP characters.
     // If the font family for script is not found or the character is
     // not in BMP (> U+FFFF), we resort to the hard-coded list of
     // fallback fonts for now.
     if (!family || character > 0xFFFF) {
         int plane = character >> 16;
         switch (plane) {
         case 1:
@@ skipping 14 matching lines @@
             family = L"lucida sans unicode";
         }
     }
 
     if (scriptChecked)
         *scriptChecked = script;
     return family;
 }
 
 } // namespace blink