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| 1 /* | |
| 2 * Copyright (C) 2010, 2013 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' | |
| 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS | |
| 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
| 23 * THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "core/platform/Language.h" | |
| 28 | |
| 29 #include "public/platform/Platform.h" | |
| 30 #include "wtf/text/WTFString.h" | |
| 31 | |
| 32 namespace WebCore { | |
| 33 | |
| 34 static String platformLanguage() | |
| 35 { | |
| 36 DEFINE_STATIC_LOCAL(String, computedDefaultLanguage, ()); | |
| 37 if (computedDefaultLanguage.isEmpty()) { | |
| 38 computedDefaultLanguage.append(WebKit::Platform::current()->defaultLocal
e()); | |
| 39 ASSERT(!computedDefaultLanguage.isEmpty()); | |
| 40 } | |
| 41 return computedDefaultLanguage; | |
| 42 } | |
| 43 | |
| 44 String defaultLanguage() | |
| 45 { | |
| 46 Vector<String> languages = userPreferredLanguages(); | |
| 47 if (languages.size()) | |
| 48 return languages[0]; | |
| 49 | |
| 50 return emptyString(); | |
| 51 } | |
| 52 | |
| 53 static Vector<String>& preferredLanguagesOverride() | |
| 54 { | |
| 55 DEFINE_STATIC_LOCAL(Vector<String>, override, ()); | |
| 56 return override; | |
| 57 } | |
| 58 | |
| 59 Vector<String> userPreferredLanguagesOverride() | |
| 60 { | |
| 61 return preferredLanguagesOverride(); | |
| 62 } | |
| 63 | |
| 64 void overrideUserPreferredLanguages(const Vector<String>& override) | |
| 65 { | |
| 66 preferredLanguagesOverride() = override; | |
| 67 } | |
| 68 | |
| 69 Vector<String> userPreferredLanguages() | |
| 70 { | |
| 71 Vector<String>& override = preferredLanguagesOverride(); | |
| 72 if (!override.isEmpty()) | |
| 73 return override; | |
| 74 | |
| 75 Vector<String> languages; | |
| 76 languages.reserveInitialCapacity(1); | |
| 77 languages.append(platformLanguage()); | |
| 78 return languages; | |
| 79 } | |
| 80 | |
| 81 static String canonicalLanguageIdentifier(const String& languageCode) | |
| 82 { | |
| 83 String lowercaseLanguageCode = languageCode.lower(); | |
| 84 | |
| 85 if (lowercaseLanguageCode.length() >= 3 && lowercaseLanguageCode[2] == '_') | |
| 86 lowercaseLanguageCode.replace(2, 1, "-"); | |
| 87 | |
| 88 return lowercaseLanguageCode; | |
| 89 } | |
| 90 | |
| 91 size_t indexOfBestMatchingLanguageInList(const String& language, const Vector<St
ring>& languageList) | |
| 92 { | |
| 93 String languageWithoutLocaleMatch; | |
| 94 String languageMatchButNotLocale; | |
| 95 size_t languageWithoutLocaleMatchIndex = 0; | |
| 96 size_t languageMatchButNotLocaleMatchIndex = 0; | |
| 97 bool canMatchLanguageOnly = (language.length() == 2 || (language.length() >=
3 && language[2] == '-')); | |
| 98 | |
| 99 for (size_t i = 0; i < languageList.size(); ++i) { | |
| 100 String canonicalizedLanguageFromList = canonicalLanguageIdentifier(langu
ageList[i]); | |
| 101 | |
| 102 if (language == canonicalizedLanguageFromList) | |
| 103 return i; | |
| 104 | |
| 105 if (canMatchLanguageOnly && canonicalizedLanguageFromList.length() >= 2)
{ | |
| 106 if (language[0] == canonicalizedLanguageFromList[0] && language[1] =
= canonicalizedLanguageFromList[1]) { | |
| 107 if (!languageWithoutLocaleMatch.length() && canonicalizedLanguag
eFromList.length() == 2) { | |
| 108 languageWithoutLocaleMatch = languageList[i]; | |
| 109 languageWithoutLocaleMatchIndex = i; | |
| 110 } | |
| 111 if (!languageMatchButNotLocale.length() && canonicalizedLanguage
FromList.length() >= 3) { | |
| 112 languageMatchButNotLocale = languageList[i]; | |
| 113 languageMatchButNotLocaleMatchIndex = i; | |
| 114 } | |
| 115 } | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 // If we have both a language-only match and a languge-but-not-locale match,
return the | |
| 120 // languge-only match as is considered a "better" match. For example, if the
list | |
| 121 // provided has both "en-GB" and "en" and the user prefers "en-US" we will r
eturn "en". | |
| 122 if (languageWithoutLocaleMatch.length()) | |
| 123 return languageWithoutLocaleMatchIndex; | |
| 124 | |
| 125 if (languageMatchButNotLocale.length()) | |
| 126 return languageMatchButNotLocaleMatchIndex; | |
| 127 | |
| 128 return languageList.size(); | |
| 129 } | |
| 130 | |
| 131 } | |
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Chromium Code Reviews
Issue 25195003:
Prepare to move core/platform/text into blink_platform.dll (Closed)
Base URL: svn://svn.chromium.org/blink/trunk