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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 "src/extensions/experimental/break-iterator.h" | |
| 29 | |
| 30 #include <string.h> | |
| 31 | |
| 32 #include "unicode/brkiter.h" | |
| 33 #include "unicode/locid.h" | |
| 34 #include "unicode/rbbi.h" | |
| 35 | |
| 36 namespace v8 { | |
| 37 namespace internal { | |
| 38 | |
| 39 v8::Persistent<v8::FunctionTemplate> BreakIterator::break_iterator_template_; | |
| 40 | |
| 41 icu::BreakIterator* BreakIterator::UnpackBreakIterator( | |
| 42 v8::Handle<v8::Object> obj) { | |
| 43 if (break_iterator_template_->HasInstance(obj)) { | |
| 44 return static_cast<icu::BreakIterator*>( | |
| 45 obj->GetPointerFromInternalField(0)); | |
| 46 } | |
| 47 | |
| 48 return NULL; | |
| 49 } | |
| 50 | |
| 51 icu::UnicodeString* BreakIterator::ResetAdoptedText( | |
| 52 v8::Handle<v8::Object> obj, v8::Handle<v8::Value> value) { | |
| 53 // Get the previous value from the internal field. | |
| 54 icu::UnicodeString* text = static_cast<icu::UnicodeString*>( | |
| 55 obj->GetPointerFromInternalField(1)); | |
| 56 delete text; | |
| 57 | |
| 58 // Assign new value to the internal pointer. | |
| 59 v8::String::Value text_value(value); | |
| 60 text = new icu::UnicodeString( | |
| 61 reinterpret_cast<const UChar*>(*text_value), text_value.length()); | |
| 62 obj->SetPointerInInternalField(1, text); | |
| 63 | |
| 64 // Return new unicode string pointer. | |
| 65 return text; | |
| 66 } | |
| 67 | |
| 68 void BreakIterator::DeleteBreakIterator(v8::Persistent<v8::Value> object, | |
| 69 void* param) { | |
| 70 v8::Persistent<v8::Object> persistent_object = | |
| 71 v8::Persistent<v8::Object>::Cast(object); | |
| 72 | |
| 73 // First delete the hidden C++ object. | |
| 74 // Unpacking should never return NULL here. That would only happen if | |
| 75 // this method is used as the weak callback for persistent handles not | |
| 76 // pointing to a break iterator. | |
| 77 delete UnpackBreakIterator(persistent_object); | |
| 78 | |
| 79 delete static_cast<icu::UnicodeString*>( | |
| 80 persistent_object->GetPointerFromInternalField(1)); | |
| 81 | |
| 82 // Then dispose of the persistent handle to JS object. | |
| 83 persistent_object.Dispose(); | |
| 84 } | |
| 85 | |
| 86 // Throws a JavaScript exception. | |
| 87 static v8::Handle<v8::Value> ThrowUnexpectedObjectError() { | |
| 88 // Returns undefined, and schedules an exception to be thrown. | |
| 89 return v8::ThrowException(v8::Exception::Error( | |
| 90 v8::String::New("BreakIterator method called on an object " | |
| 91 "that is not a BreakIterator."))); | |
| 92 } | |
| 93 | |
| 94 v8::Handle<v8::Value> BreakIterator::BreakIteratorAdoptText( | |
| 95 const v8::Arguments& args) { | |
| 96 if (args.Length() != 1 || !args[0]->IsString()) { | |
| 97 return v8::ThrowException(v8::Exception::SyntaxError( | |
| 98 v8::String::New("Text input is required."))); | |
| 99 } | |
| 100 | |
| 101 icu::BreakIterator* break_iterator = UnpackBreakIterator(args.Holder()); | |
| 102 if (!break_iterator) { | |
| 103 return ThrowUnexpectedObjectError(); | |
| 104 } | |
| 105 | |
| 106 break_iterator->setText(*ResetAdoptedText(args.Holder(), args[0])); | |
| 107 | |
| 108 return v8::Undefined(); | |
| 109 } | |
| 110 | |
| 111 v8::Handle<v8::Value> BreakIterator::BreakIteratorFirst( | |
| 112 const v8::Arguments& args) { | |
| 113 icu::BreakIterator* break_iterator = UnpackBreakIterator(args.Holder()); | |
| 114 if (!break_iterator) { | |
| 115 return ThrowUnexpectedObjectError(); | |
| 116 } | |
| 117 | |
| 118 return v8::Int32::New(break_iterator->first()); | |
| 119 } | |
| 120 | |
| 121 v8::Handle<v8::Value> BreakIterator::BreakIteratorNext( | |
| 122 const v8::Arguments& args) { | |
| 123 icu::BreakIterator* break_iterator = UnpackBreakIterator(args.Holder()); | |
| 124 if (!break_iterator) { | |
| 125 return ThrowUnexpectedObjectError(); | |
| 126 } | |
| 127 | |
| 128 return v8::Int32::New(break_iterator->next()); | |
| 129 } | |
| 130 | |
| 131 v8::Handle<v8::Value> BreakIterator::BreakIteratorCurrent( | |
| 132 const v8::Arguments& args) { | |
| 133 icu::BreakIterator* break_iterator = UnpackBreakIterator(args.Holder()); | |
| 134 if (!break_iterator) { | |
| 135 return ThrowUnexpectedObjectError(); | |
| 136 } | |
| 137 | |
| 138 return v8::Int32::New(break_iterator->current()); | |
| 139 } | |
| 140 | |
| 141 v8::Handle<v8::Value> BreakIterator::BreakIteratorBreakType( | |
| 142 const v8::Arguments& args) { | |
| 143 icu::BreakIterator* break_iterator = UnpackBreakIterator(args.Holder()); | |
| 144 if (!break_iterator) { | |
| 145 return ThrowUnexpectedObjectError(); | |
| 146 } | |
| 147 | |
| 148 // TODO(cira): Remove cast once ICU fixes base BreakIterator class. | |
| 149 icu::RuleBasedBreakIterator* rule_based_iterator = | |
| 150 static_cast<icu::RuleBasedBreakIterator*>(break_iterator); | |
| 151 int32_t status = rule_based_iterator->getRuleStatus(); | |
| 152 // Keep return values in sync with JavaScript BreakType enum. | |
| 153 if (status >= UBRK_WORD_NONE && status < UBRK_WORD_NONE_LIMIT) { | |
| 154 return v8::Int32::New(UBRK_WORD_NONE); | |
| 155 } else if (status >= UBRK_WORD_NUMBER && status < UBRK_WORD_NUMBER_LIMIT) { | |
| 156 return v8::Int32::New(UBRK_WORD_NUMBER); | |
| 157 } else if (status >= UBRK_WORD_LETTER && status < UBRK_WORD_LETTER_LIMIT) { | |
| 158 return v8::Int32::New(UBRK_WORD_LETTER); | |
| 159 } else if (status >= UBRK_WORD_KANA && status < UBRK_WORD_KANA_LIMIT) { | |
| 160 return v8::Int32::New(UBRK_WORD_KANA); | |
| 161 } else if (status >= UBRK_WORD_IDEO && status < UBRK_WORD_IDEO_LIMIT) { | |
| 162 return v8::Int32::New(UBRK_WORD_IDEO); | |
| 163 } else { | |
| 164 return v8::Int32::New(-1); | |
| 165 } | |
| 166 } | |
| 167 | |
| 168 v8::Handle<v8::Value> BreakIterator::JSBreakIterator( | |
| 169 const v8::Arguments& args) { | |
| 170 v8::HandleScope handle_scope; | |
| 171 | |
| 172 if (args.Length() != 2 || !args[0]->IsString() || !args[1]->IsString()) { | |
| 173 return v8::ThrowException(v8::Exception::SyntaxError( | |
| 174 v8::String::New("Locale and iterator type are required."))); | |
| 175 } | |
| 176 | |
| 177 v8::String::Utf8Value locale(args[0]); | |
| 178 icu::Locale icu_locale(*locale); | |
| 179 | |
| 180 UErrorCode status = U_ZERO_ERROR; | |
| 181 icu::BreakIterator* break_iterator = NULL; | |
| 182 v8::String::Utf8Value type(args[1]); | |
| 183 if (!strcmp(*type, "character")) { | |
| 184 break_iterator = | |
| 185 icu::BreakIterator::createCharacterInstance(icu_locale, status); | |
| 186 } else if (!strcmp(*type, "word")) { | |
| 187 break_iterator = | |
| 188 icu::BreakIterator::createWordInstance(icu_locale, status); | |
| 189 } else if (!strcmp(*type, "sentence")) { | |
| 190 break_iterator = | |
| 191 icu::BreakIterator::createSentenceInstance(icu_locale, status); | |
| 192 } else if (!strcmp(*type, "line")) { | |
| 193 break_iterator = | |
| 194 icu::BreakIterator::createLineInstance(icu_locale, status); | |
| 195 } else { | |
| 196 return v8::ThrowException(v8::Exception::SyntaxError( | |
| 197 v8::String::New("Invalid iterator type."))); | |
| 198 } | |
| 199 | |
| 200 if (U_FAILURE(status)) { | |
| 201 delete break_iterator; | |
| 202 return v8::ThrowException(v8::Exception::Error( | |
| 203 v8::String::New("Failed to create break iterator."))); | |
| 204 } | |
| 205 | |
| 206 if (break_iterator_template_.IsEmpty()) { | |
| 207 v8::Local<v8::FunctionTemplate> raw_template(v8::FunctionTemplate::New()); | |
| 208 | |
| 209 raw_template->SetClassName(v8::String::New("v8Locale.v8BreakIterator")); | |
| 210 | |
| 211 // Define internal field count on instance template. | |
| 212 v8::Local<v8::ObjectTemplate> object_template = | |
| 213 raw_template->InstanceTemplate(); | |
| 214 | |
| 215 // Set aside internal fields for icu break iterator and adopted text. | |
| 216 object_template->SetInternalFieldCount(2); | |
| 217 | |
| 218 // Define all of the prototype methods on prototype template. | |
| 219 v8::Local<v8::ObjectTemplate> proto = raw_template->PrototypeTemplate(); | |
| 220 proto->Set(v8::String::New("adoptText"), | |
| 221 v8::FunctionTemplate::New(BreakIteratorAdoptText)); | |
| 222 proto->Set(v8::String::New("first"), | |
| 223 v8::FunctionTemplate::New(BreakIteratorFirst)); | |
| 224 proto->Set(v8::String::New("next"), | |
| 225 v8::FunctionTemplate::New(BreakIteratorNext)); | |
| 226 proto->Set(v8::String::New("current"), | |
| 227 v8::FunctionTemplate::New(BreakIteratorCurrent)); | |
| 228 proto->Set(v8::String::New("breakType"), | |
| 229 v8::FunctionTemplate::New(BreakIteratorBreakType)); | |
| 230 | |
| 231 break_iterator_template_ = | |
| 232 v8::Persistent<v8::FunctionTemplate>::New(raw_template); | |
| 233 } | |
| 234 | |
| 235 // Create an empty object wrapper. | |
| 236 v8::Local<v8::Object> local_object = | |
| 237 break_iterator_template_->GetFunction()->NewInstance(); | |
| 238 v8::Persistent<v8::Object> wrapper = | |
| 239 v8::Persistent<v8::Object>::New(local_object); | |
| 240 | |
| 241 // Set break iterator as internal field of the resulting JS object. | |
| 242 wrapper->SetPointerInInternalField(0, break_iterator); | |
| 243 // Make sure that the pointer to adopted text is NULL. | |
| 244 wrapper->SetPointerInInternalField(1, NULL); | |
| 245 | |
| 246 // Make object handle weak so we can delete iterator once GC kicks in. | |
| 247 wrapper.MakeWeak(NULL, DeleteBreakIterator); | |
| 248 | |
| 249 return wrapper; | |
| 250 } | |
| 251 | |
| 252 } } // namespace v8::internal | |
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Chromium Code Reviews
Issue 9016034:
Removing experimental i18n code from v8 repository. Internationalization support is hosted under ... (Closed)
Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/