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1 /* | 1 /* |
2 * Copyright (c) 2011 Google Inc. All rights reserved. | 2 * Copyright (c) 2011 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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34 #include "platform/fonts/AcceptLanguagesResolver.h" | 34 #include "platform/fonts/AcceptLanguagesResolver.h" |
35 #include "platform/fonts/SimpleFontData.h" | 35 #include "platform/fonts/SimpleFontData.h" |
36 #include "platform/fonts/FontDescription.h" | 36 #include "platform/fonts/FontDescription.h" |
37 #include "platform/fonts/FontFaceCreationParams.h" | 37 #include "platform/fonts/FontFaceCreationParams.h" |
38 #include "platform/text/LocaleToScriptMapping.h" | 38 #include "platform/text/LocaleToScriptMapping.h" |
39 #include "third_party/skia/include/core/SkTypeface.h" | 39 #include "third_party/skia/include/core/SkTypeface.h" |
40 #include "third_party/skia/include/ports/SkFontMgr.h" | 40 #include "third_party/skia/include/ports/SkFontMgr.h" |
41 | 41 |
42 namespace blink { | 42 namespace blink { |
43 | 43 |
44 // SkFontMgr requires script-based locale names, like "zh-Hant" and "zh-Hans", | 44 PassRefPtr<SimpleFontData> FontCache::fallbackFontForCharacter(const FontDescrip
tion& fontDescription, UChar32 c, const SimpleFontData*) |
45 // instead of "zh-CN" and "zh-TW". | |
46 static CString toSkFontMgrLocale(const String& locale) | |
47 { | |
48 if (!locale.startsWith("zh", TextCaseInsensitive)) | |
49 return locale.ascii(); | |
50 | |
51 switch (localeToScriptCodeForFontSelection(locale)) { | |
52 case USCRIPT_SIMPLIFIED_HAN: | |
53 return "zh-Hans"; | |
54 case USCRIPT_TRADITIONAL_HAN: | |
55 return "zh-Hant"; | |
56 default: | |
57 return locale.ascii(); | |
58 } | |
59 } | |
60 | |
61 static AtomicString getFamilyNameForCharacter(UChar32 c, const FontDescription&
fontDescription) | |
62 { | 45 { |
63 RefPtr<SkFontMgr> fm = adoptRef(SkFontMgr::RefDefault()); | 46 RefPtr<SkFontMgr> fm = adoptRef(SkFontMgr::RefDefault()); |
64 const char* bcp47Locales[3]; | 47 AtomicString familyName = getFamilyNameForCharacter(fm.get(), c, fontDescrip
tion); |
65 int localeCount = 0; | |
66 if (const char* hanLocale = AcceptLanguagesResolver::preferredHanSkFontMgrLo
cale()) | |
67 bcp47Locales[localeCount++] = hanLocale; | |
68 CString defaultLocale = toSkFontMgrLocale(defaultLanguage()); | |
69 bcp47Locales[localeCount++] = defaultLocale.data(); | |
70 CString fontLocale; | |
71 if (!fontDescription.locale().isEmpty()) { | |
72 fontLocale = toSkFontMgrLocale(fontDescription.locale()); | |
73 bcp47Locales[localeCount++] = fontLocale.data(); | |
74 } | |
75 RefPtr<SkTypeface> typeface = adoptRef(fm->matchFamilyStyleCharacter(0, SkFo
ntStyle(), bcp47Locales, localeCount, c)); | |
76 if (!typeface) | |
77 return emptyAtom; | |
78 | |
79 SkString skiaFamilyName; | |
80 typeface->getFamilyName(&skiaFamilyName); | |
81 return skiaFamilyName.c_str(); | |
82 } | |
83 | |
84 PassRefPtr<SimpleFontData> FontCache::fallbackFontForCharacter(const FontDescrip
tion& fontDescription, UChar32 c, const SimpleFontData*) | |
85 { | |
86 AtomicString familyName = getFamilyNameForCharacter(c, fontDescription); | |
87 if (familyName.isEmpty()) | 48 if (familyName.isEmpty()) |
88 return getLastResortFallbackFont(fontDescription, DoNotRetain); | 49 return getLastResortFallbackFont(fontDescription, DoNotRetain); |
89 return fontDataFromFontPlatformData(getFontPlatformData(fontDescription, Fon
tFaceCreationParams(familyName)), DoNotRetain); | 50 return fontDataFromFontPlatformData(getFontPlatformData(fontDescription, Fon
tFaceCreationParams(familyName)), DoNotRetain); |
90 } | 51 } |
91 | 52 |
92 // static | 53 // static |
93 AtomicString FontCache::getGenericFamilyNameForScript(const AtomicString& family
Name, const FontDescription& fontDescription) | 54 AtomicString FontCache::getGenericFamilyNameForScript(const AtomicString& family
Name, const FontDescription& fontDescription) |
94 { | 55 { |
95 // This is a hack to use the preferred font for CJK scripts. | 56 // This is a hack to use the preferred font for CJK scripts. |
96 // FIXME: Use new Skia API once Android system supports per-family and per-s
cript fallback fonts. | 57 // FIXME: Use new Skia API once Android system supports per-family and per-s
cript fallback fonts. |
97 UChar32 examplerChar; | 58 UChar32 examplerChar; |
98 switch (fontDescription.script()) { | 59 switch (fontDescription.script()) { |
99 case USCRIPT_SIMPLIFIED_HAN: | 60 case USCRIPT_SIMPLIFIED_HAN: |
100 case USCRIPT_TRADITIONAL_HAN: | 61 case USCRIPT_TRADITIONAL_HAN: |
101 case USCRIPT_KATAKANA_OR_HIRAGANA: | 62 case USCRIPT_KATAKANA_OR_HIRAGANA: |
102 examplerChar = 0x4E00; // A common character in Japanese and Chinese. | 63 examplerChar = 0x4E00; // A common character in Japanese and Chinese. |
103 break; | 64 break; |
104 case USCRIPT_HANGUL: | 65 case USCRIPT_HANGUL: |
105 examplerChar = 0xAC00; | 66 examplerChar = 0xAC00; |
106 break; | 67 break; |
107 default: | 68 default: |
108 // For other scripts, use the default generic family mapping logic. | 69 // For other scripts, use the default generic family mapping logic. |
109 return familyName; | 70 return familyName; |
110 } | 71 } |
111 | 72 |
112 return getFamilyNameForCharacter(examplerChar, fontDescription); | 73 RefPtr<SkFontMgr> fm = adoptRef(SkFontMgr::RefDefault()); |
| 74 return getFamilyNameForCharacter(fm.get(), examplerChar, fontDescription); |
113 } | 75 } |
114 | 76 |
115 } // namespace blink | 77 } // namespace blink |
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