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| 1 // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are |
| 4 // met: |
| 5 // |
| 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided |
| 11 // with the distribution. |
| 12 // * Neither the name of Google Inc. nor the names of its |
| 13 // contributors may be used to endorse or promote products derived |
| 14 // from this software without specific prior written permission. |
| 15 // |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 |
| 28 #include "collator.h" |
| 29 |
| 30 #include "unicode/coll.h" |
| 31 #include "unicode/locid.h" |
| 32 #include "unicode/ucol.h" |
| 33 |
| 34 namespace v8 { |
| 35 namespace internal { |
| 36 |
| 37 v8::Persistent<v8::FunctionTemplate> Collator::collator_template_; |
| 38 |
| 39 icu::Collator* Collator::UnpackCollator(v8::Handle<v8::Object> obj) { |
| 40 if (collator_template_->HasInstance(obj)) { |
| 41 return static_cast<icu::Collator*>(obj->GetPointerFromInternalField(0)); |
| 42 } |
| 43 |
| 44 return NULL; |
| 45 } |
| 46 |
| 47 void Collator::DeleteCollator(v8::Persistent<v8::Value> object, void* param) { |
| 48 v8::Persistent<v8::Object> persistent_object = |
| 49 v8::Persistent<v8::Object>::Cast(object); |
| 50 |
| 51 // First delete the hidden C++ object. |
| 52 // Unpacking should never return NULL here. That would only happen if |
| 53 // this method is used as the weak callback for persistent handles not |
| 54 // pointing to a break iterator. |
| 55 delete UnpackCollator(persistent_object); |
| 56 |
| 57 // Then dispose of the persistent handle to JS object. |
| 58 persistent_object.Dispose(); |
| 59 } |
| 60 |
| 61 // Throws a JavaScript exception. |
| 62 static v8::Handle<v8::Value> ThrowUnexpectedObjectError() { |
| 63 // Returns undefined, and schedules an exception to be thrown. |
| 64 return v8::ThrowException(v8::Exception::Error( |
| 65 v8::String::New("Collator method called on an object " |
| 66 "that is not a Collator."))); |
| 67 } |
| 68 |
| 69 // Extract a boolean option named in |option| and set it to |result|. |
| 70 // Return true if it's specified. Otherwise, return false. |
| 71 static bool ExtractBooleanOption(const v8::Local<v8::Object>& options, |
| 72 const char* option, |
| 73 bool* result) { |
| 74 v8::HandleScope handle_scope; |
| 75 v8::TryCatch try_catch; |
| 76 v8::Handle<v8::Value> value = options->Get(v8::String::New(option)); |
| 77 if (try_catch.HasCaught()) { |
| 78 return false; |
| 79 } |
| 80 // No need to check if |value| is empty because it's taken care of |
| 81 // by TryCatch above. |
| 82 if (!value->IsUndefined() && !value->IsNull()) { |
| 83 if (value->IsBoolean()) { |
| 84 *result = value->BooleanValue(); |
| 85 return true; |
| 86 } |
| 87 } |
| 88 return false; |
| 89 } |
| 90 |
| 91 // When there's an ICU error, throw a JavaScript error with |message|. |
| 92 static v8::Handle<v8::Value> ThrowExceptionForICUError(const char* message) { |
| 93 return v8::ThrowException(v8::Exception::Error(v8::String::New(message))); |
| 94 } |
| 95 |
| 96 v8::Handle<v8::Value> Collator::CollatorCompare(const v8::Arguments& args) { |
| 97 if (args.Length() != 2 || !args[0]->IsString() || !args[1]->IsString()) { |
| 98 return v8::ThrowException(v8::Exception::SyntaxError( |
| 99 v8::String::New("Two string arguments are required."))); |
| 100 } |
| 101 |
| 102 icu::Collator* collator = UnpackCollator(args.Holder()); |
| 103 if (!collator) { |
| 104 return ThrowUnexpectedObjectError(); |
| 105 } |
| 106 |
| 107 v8::String::Value string_value1(args[0]); |
| 108 v8::String::Value string_value2(args[1]); |
| 109 const UChar* string1 = reinterpret_cast<const UChar*>(*string_value1); |
| 110 const UChar* string2 = reinterpret_cast<const UChar*>(*string_value2); |
| 111 UErrorCode status = U_ZERO_ERROR; |
| 112 UCollationResult result = collator->compare( |
| 113 string1, string_value1.length(), string2, string_value2.length(), status); |
| 114 |
| 115 if (U_FAILURE(status)) { |
| 116 return ThrowExceptionForICUError( |
| 117 "Unexpected failure in Collator.compare."); |
| 118 } |
| 119 |
| 120 return v8::Int32::New(result); |
| 121 } |
| 122 |
| 123 v8::Handle<v8::Value> Collator::JSCollator(const v8::Arguments& args) { |
| 124 v8::HandleScope handle_scope; |
| 125 |
| 126 if (args.Length() != 2 || !args[0]->IsString() || !args[1]->IsObject()) { |
| 127 return v8::ThrowException(v8::Exception::SyntaxError( |
| 128 v8::String::New("Locale and collation options are required."))); |
| 129 } |
| 130 |
| 131 v8::String::AsciiValue locale(args[0]); |
| 132 icu::Locale icu_locale(*locale); |
| 133 |
| 134 icu::Collator* collator = NULL; |
| 135 UErrorCode status = U_ZERO_ERROR; |
| 136 collator = icu::Collator::createInstance(icu_locale, status); |
| 137 |
| 138 if (U_FAILURE(status)) { |
| 139 delete collator; |
| 140 return ThrowExceptionForICUError("Failed to create collator."); |
| 141 } |
| 142 |
| 143 v8::Local<v8::Object> options(args[1]->ToObject()); |
| 144 |
| 145 // Below, we change collation options that are explicitly specified |
| 146 // by a caller in JavaScript. Otherwise, we don't touch because |
| 147 // we don't want to change the locale-dependent default value. |
| 148 // The three options below are very likely to have the same default |
| 149 // across locales, but I haven't checked them all. Others we may add |
| 150 // in the future have certainly locale-dependent default (e.g. |
| 151 // caseFirst is upperFirst for Danish while is off for most other locales). |
| 152 |
| 153 bool ignore_case, ignore_accents, numeric; |
| 154 |
| 155 if (ExtractBooleanOption(options, "ignoreCase", &ignore_case)) { |
| 156 collator->setAttribute(UCOL_CASE_LEVEL, ignore_case ? UCOL_OFF : UCOL_ON, |
| 157 status); |
| 158 if (U_FAILURE(status)) { |
| 159 delete collator; |
| 160 return ThrowExceptionForICUError("Failed to set ignoreCase."); |
| 161 } |
| 162 } |
| 163 |
| 164 // Accents are taken into account with strength secondary or higher. |
| 165 if (ExtractBooleanOption(options, "ignoreAccents", &ignore_accents)) { |
| 166 if (!ignore_accents) { |
| 167 collator->setStrength(icu::Collator::SECONDARY); |
| 168 } else { |
| 169 collator->setStrength(icu::Collator::PRIMARY); |
| 170 } |
| 171 } |
| 172 |
| 173 if (ExtractBooleanOption(options, "numeric", &numeric)) { |
| 174 collator->setAttribute(UCOL_NUMERIC_COLLATION, |
| 175 numeric ? UCOL_ON : UCOL_OFF, status); |
| 176 if (U_FAILURE(status)) { |
| 177 delete collator; |
| 178 return ThrowExceptionForICUError("Failed to set numeric sort option."); |
| 179 } |
| 180 } |
| 181 |
| 182 if (collator_template_.IsEmpty()) { |
| 183 v8::Local<v8::FunctionTemplate> raw_template(v8::FunctionTemplate::New()); |
| 184 raw_template->SetClassName(v8::String::New("v8Locale.Collator")); |
| 185 |
| 186 // Define internal field count on instance template. |
| 187 v8::Local<v8::ObjectTemplate> object_template = |
| 188 raw_template->InstanceTemplate(); |
| 189 |
| 190 // Set aside internal fields for icu collator. |
| 191 object_template->SetInternalFieldCount(1); |
| 192 |
| 193 // Define all of the prototype methods on prototype template. |
| 194 v8::Local<v8::ObjectTemplate> proto = raw_template->PrototypeTemplate(); |
| 195 proto->Set(v8::String::New("compare"), |
| 196 v8::FunctionTemplate::New(CollatorCompare)); |
| 197 |
| 198 collator_template_ = |
| 199 v8::Persistent<v8::FunctionTemplate>::New(raw_template); |
| 200 } |
| 201 |
| 202 // Create an empty object wrapper. |
| 203 v8::Local<v8::Object> local_object = |
| 204 collator_template_->GetFunction()->NewInstance(); |
| 205 v8::Persistent<v8::Object> wrapper = |
| 206 v8::Persistent<v8::Object>::New(local_object); |
| 207 |
| 208 // Set collator as internal field of the resulting JS object. |
| 209 wrapper->SetPointerInInternalField(0, collator); |
| 210 |
| 211 // Make object handle weak so we can delete iterator once GC kicks in. |
| 212 wrapper.MakeWeak(NULL, DeleteCollator); |
| 213 |
| 214 return wrapper; |
| 215 } |
| 216 |
| 217 } } // namespace v8::internal |
| 218 |
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