The Tor Browser / file comparison
comparison: dom/encoding/FallbackEncoding.cpp
dom/encoding/FallbackEncoding.cpp
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
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replaced
| -1:000000000000 | 0:a13fde5dd5b9 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include "mozilla/dom/FallbackEncoding.h" | |
| 6 | |
| 7 #include "mozilla/dom/EncodingUtils.h" | |
| 8 #include "nsUConvPropertySearch.h" | |
| 9 #include "nsIChromeRegistry.h" | |
| 10 #include "mozilla/Preferences.h" | |
| 11 #include "mozilla/Services.h" | |
| 12 | |
| 13 namespace mozilla { | |
| 14 namespace dom { | |
| 15 | |
| 16 static const char* localesFallbacks[][3] = { | |
| 17 #include "localesfallbacks.properties.h" | |
| 18 }; | |
| 19 | |
| 20 static const char* domainsFallbacks[][3] = { | |
| 21 #include "domainsfallbacks.properties.h" | |
| 22 }; | |
| 23 | |
| 24 static const char* nonParticipatingDomains[][3] = { | |
| 25 #include "nonparticipatingdomains.properties.h" | |
| 26 }; | |
| 27 | |
| 28 FallbackEncoding* FallbackEncoding::sInstance = nullptr; | |
| 29 bool FallbackEncoding::sGuessFallbackFromTopLevelDomain = true; | |
| 30 | |
| 31 FallbackEncoding::FallbackEncoding() | |
| 32 { | |
| 33 MOZ_COUNT_CTOR(FallbackEncoding); | |
| 34 MOZ_ASSERT(!FallbackEncoding::sInstance, | |
| 35 "Singleton already exists."); | |
| 36 } | |
| 37 | |
| 38 FallbackEncoding::~FallbackEncoding() | |
| 39 { | |
| 40 MOZ_COUNT_DTOR(FallbackEncoding); | |
| 41 } | |
| 42 | |
| 43 void | |
| 44 FallbackEncoding::Get(nsACString& aFallback) | |
| 45 { | |
| 46 if (!mFallback.IsEmpty()) { | |
| 47 aFallback = mFallback; | |
| 48 return; | |
| 49 } | |
| 50 | |
| 51 const nsAdoptingCString& override = | |
| 52 Preferences::GetCString("intl.charset.fallback.override"); | |
| 53 // Don't let the user break things by setting the override to unreasonable | |
| 54 // values via about:config | |
| 55 if (!EncodingUtils::FindEncodingForLabel(override, mFallback) || | |
| 56 !EncodingUtils::IsAsciiCompatible(mFallback) || | |
| 57 mFallback.EqualsLiteral("UTF-8")) { | |
| 58 mFallback.Truncate(); | |
| 59 } | |
| 60 | |
| 61 if (!mFallback.IsEmpty()) { | |
| 62 aFallback = mFallback; | |
| 63 return; | |
| 64 } | |
| 65 | |
| 66 nsAutoCString locale; | |
| 67 nsCOMPtr<nsIXULChromeRegistry> registry = | |
| 68 mozilla::services::GetXULChromeRegistryService(); | |
| 69 if (registry) { | |
| 70 registry->GetSelectedLocale(NS_LITERAL_CSTRING("global"), locale); | |
| 71 } | |
| 72 | |
| 73 // Let's lower case the string just in case unofficial language packs | |
| 74 // don't stick to conventions. | |
| 75 ToLowerCase(locale); // ASCII lowercasing with CString input! | |
| 76 | |
| 77 // Special case Traditional Chinese before throwing away stuff after the | |
| 78 // language itself. Today we only ship zh-TW, but be defensive about | |
| 79 // possible future values. | |
| 80 if (locale.EqualsLiteral("zh-tw") || | |
| 81 locale.EqualsLiteral("zh-hk") || | |
| 82 locale.EqualsLiteral("zh-mo") || | |
| 83 locale.EqualsLiteral("zh-hant")) { | |
| 84 mFallback.AssignLiteral("Big5"); | |
| 85 aFallback = mFallback; | |
| 86 return; | |
| 87 } | |
| 88 | |
| 89 // Throw away regions and other variants to accommodate weird stuff seen | |
| 90 // in telemetry--apparently unofficial language packs. | |
| 91 int32_t index = locale.FindChar('-'); | |
| 92 if (index >= 0) { | |
| 93 locale.Truncate(index); | |
| 94 } | |
| 95 | |
| 96 if (NS_FAILED(nsUConvPropertySearch::SearchPropertyValue( | |
| 97 localesFallbacks, ArrayLength(localesFallbacks), locale, mFallback))) { | |
| 98 mFallback.AssignLiteral("windows-1252"); | |
| 99 } | |
| 100 | |
| 101 aFallback = mFallback; | |
| 102 } | |
| 103 | |
| 104 void | |
| 105 FallbackEncoding::FromLocale(nsACString& aFallback) | |
| 106 { | |
| 107 MOZ_ASSERT(FallbackEncoding::sInstance, | |
| 108 "Using uninitialized fallback cache."); | |
| 109 FallbackEncoding::sInstance->Get(aFallback); | |
| 110 } | |
| 111 | |
| 112 // PrefChangedFunc | |
| 113 void | |
| 114 FallbackEncoding::PrefChanged(const char*, void*) | |
| 115 { | |
| 116 MOZ_ASSERT(FallbackEncoding::sInstance, | |
| 117 "Pref callback called with null fallback cache."); | |
| 118 FallbackEncoding::sInstance->Invalidate(); | |
| 119 } | |
| 120 | |
| 121 void | |
| 122 FallbackEncoding::Initialize() | |
| 123 { | |
| 124 MOZ_ASSERT(!FallbackEncoding::sInstance, | |
| 125 "Initializing pre-existing fallback cache."); | |
| 126 FallbackEncoding::sInstance = new FallbackEncoding; | |
| 127 Preferences::RegisterCallback(FallbackEncoding::PrefChanged, | |
| 128 "intl.charset.fallback.override", | |
| 129 nullptr); | |
| 130 Preferences::RegisterCallback(FallbackEncoding::PrefChanged, | |
| 131 "general.useragent.locale", | |
| 132 nullptr); | |
| 133 Preferences::AddBoolVarCache(&sGuessFallbackFromTopLevelDomain, | |
| 134 "intl.charset.fallback.tld"); | |
| 135 } | |
| 136 | |
| 137 void | |
| 138 FallbackEncoding::Shutdown() | |
| 139 { | |
| 140 MOZ_ASSERT(FallbackEncoding::sInstance, | |
| 141 "Releasing non-existent fallback cache."); | |
| 142 delete FallbackEncoding::sInstance; | |
| 143 FallbackEncoding::sInstance = nullptr; | |
| 144 } | |
| 145 | |
| 146 bool | |
| 147 FallbackEncoding::IsParticipatingTopLevelDomain(const nsACString& aTLD) | |
| 148 { | |
| 149 nsAutoCString dummy; | |
| 150 return NS_FAILED(nsUConvPropertySearch::SearchPropertyValue( | |
| 151 nonParticipatingDomains, | |
| 152 ArrayLength(nonParticipatingDomains), | |
| 153 aTLD, | |
| 154 dummy)); | |
| 155 } | |
| 156 | |
| 157 void | |
| 158 FallbackEncoding::FromTopLevelDomain(const nsACString& aTLD, | |
| 159 nsACString& aFallback) | |
| 160 { | |
| 161 if (NS_FAILED(nsUConvPropertySearch::SearchPropertyValue( | |
| 162 domainsFallbacks, ArrayLength(domainsFallbacks), aTLD, aFallback))) { | |
| 163 aFallback.AssignLiteral("windows-1252"); | |
| 164 } | |
| 165 } | |
| 166 | |
| 167 } // namespace dom | |
| 168 } // namespace mozilla |
