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| 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 /** | |
| 6 * This provides classes to represent the internal structure of the | |
| 7 * arguments to `Intl.message`. It is used when parsing sources to extract | |
| 8 * messages or to generate code for message substitution. Normal programs | |
| 9 * using Intl would not import this library. | |
| 10 * | |
| 11 * While it's written | |
| 12 * in a somewhat abstract way, it has some assumptions about ICU-style | |
| 13 * message syntax for parameter substitutions, choices, selects, etc. | |
| 14 * | |
| 15 * For example, if we have the message | |
| 16 * plurals(num) => Intl.message("""${Intl.plural(num, | |
| 17 * zero : 'Is zero plural?', | |
| 18 * one : 'This is singular.', | |
| 19 * other : 'This is plural ($num).') | |
| 20 * }""", | |
| 21 * name: "plurals", args: [num], desc: "Basic plurals"); | |
| 22 * That is represented as a MainMessage which has only one message component, a | |
| 23 * Plural, but also has a name, list of arguments, and a description. | |
| 24 * The Plural has three different clauses. The `zero` clause is | |
| 25 * a LiteralString containing 'Is zero plural?'. The `other` clause is a | |
| 26 * CompositeMessage containing three pieces, a LiteralString for | |
| 27 * 'This is plural (', a VariableSubstitution for `num`. amd a LiteralString | |
| 28 * for '.)'. | |
| 29 * | |
| 30 * This representation isn't used at runtime. Rather, we read some format | |
| 31 * from a translation file, parse it into these objects, and they are then | |
| 32 * used to generate the code representation above. | |
| 33 */ | |
| 34 library intl_message; | |
| 35 | |
| 36 import 'package:analyzer/analyzer.dart'; | |
| 37 | |
| 38 /** A default function for the [Message.expanded] method. */ | |
| 39 _nullTransform(msg, chunk) => chunk; | |
| 40 | |
| 41 /** | |
| 42 * An abstract superclass for Intl.message/plural/gender calls in the | |
| 43 * program's source text. We | |
| 44 * assemble these into objects that can be used to write out some translation | |
| 45 * format and can also print themselves into code. | |
| 46 */ | |
| 47 abstract class Message { | |
| 48 | |
| 49 /** | |
| 50 * All [Message]s except a [MainMessage] are contained inside some parent, | |
| 51 * terminating at an Intl.message call which supplies the arguments we | |
| 52 * use for variable substitutions. | |
| 53 */ | |
| 54 Message parent; | |
| 55 | |
| 56 Message(this.parent); | |
| 57 | |
| 58 /** | |
| 59 * We find the arguments from the top-level [MainMessage] and use those to | |
| 60 * do variable substitutions. [MainMessage] overrides this to return | |
| 61 * the actual arguments. | |
| 62 */ | |
| 63 get arguments => parent == null ? const [] : parent.arguments; | |
| 64 | |
| 65 /** | |
| 66 * We find the examples from the top-level [MainMessage] and use those | |
| 67 * when writing out variables. [MainMessage] overrides this to return | |
| 68 * the actual examples. | |
| 69 */ | |
| 70 get examples => parent == null ? const [] : parent.examples; | |
| 71 | |
| 72 /** | |
| 73 * The name of the top-level [MainMessage]. | |
| 74 */ | |
| 75 String get name => parent == null ? '<unnamed>' : parent.name; | |
| 76 | |
| 77 String checkValidity(MethodInvocation node, List arguments, String outerName, | |
| 78 FormalParameterList outerArgs) { | |
| 79 var hasArgs = arguments.any( | |
| 80 (each) => each is NamedExpression && each.name.label.name == 'args'); | |
| 81 var hasParameters = !outerArgs.parameters.isEmpty; | |
| 82 if (!hasArgs && hasParameters) { | |
| 83 return "The 'args' argument for Intl.message must be specified"; | |
| 84 } | |
| 85 | |
| 86 var messageName = arguments.firstWhere((eachArg) => | |
| 87 eachArg is NamedExpression && eachArg.name.label.name == 'name', | |
| 88 orElse: () => null); | |
| 89 if (messageName == null) { | |
| 90 return "The 'name' argument for Intl.message must be specified"; | |
| 91 } | |
| 92 if (messageName.expression is! SimpleStringLiteral) { | |
| 93 return "The 'name' argument for Intl.message must be a simple string " | |
| 94 "literal."; | |
| 95 } | |
| 96 var hasOuterName = outerName != null; | |
| 97 var givenName = messageName.expression.value; | |
| 98 var simpleMatch = outerName == givenName; | |
| 99 ClassDeclaration classNode(n) { | |
| 100 if (n == null) return null; | |
| 101 if (n is ClassDeclaration) return n; | |
| 102 return classNode(n.parent); | |
| 103 } | |
| 104 var classDeclaration = classNode(node); | |
| 105 var classPlusMethod = classDeclaration == null | |
| 106 ? null | |
| 107 : "${classDeclaration.name.token.toString()}_$outerName"; | |
| 108 var classMatch = classPlusMethod != null && (givenName == classPlusMethod); | |
| 109 if (!(hasOuterName && (simpleMatch || classMatch))) { | |
| 110 return "The 'name' argument for Intl.message must match either" | |
| 111 "the name of the containing function or <className>_<methodName> (" | |
| 112 "'$givenName' vs. '$outerName')"; | |
| 113 } | |
| 114 var simpleArguments = arguments.where((each) => each is NamedExpression && | |
| 115 ["desc", "name"].contains(each.name.label.name)); | |
| 116 var values = simpleArguments.map((each) => each.expression).toList(); | |
| 117 for (var arg in values) { | |
| 118 if (arg is! StringLiteral) { | |
| 119 return ("Intl.message arguments must be string literals: $arg"); | |
| 120 } | |
| 121 } | |
| 122 return null; | |
| 123 } | |
| 124 | |
| 125 /** | |
| 126 * Turn a value, typically read from a translation file or created out of an | |
| 127 * AST for a source program, into the appropriate | |
| 128 * subclass. We expect to get literal Strings, variable substitutions | |
| 129 * represented by integers, things that are already MessageChunks and | |
| 130 * lists of the same. | |
| 131 */ | |
| 132 static Message from(value, Message parent) { | |
| 133 if (value is String) return new LiteralString(value, parent); | |
| 134 if (value is int) return new VariableSubstitution(value, parent); | |
| 135 if (value is Iterable) { | |
| 136 if (value.length == 1) return Message.from(value[0], parent); | |
| 137 var result = new CompositeMessage([], parent); | |
| 138 var items = value.map((x) => from(x, result)).toList(); | |
| 139 result.pieces.addAll(items); | |
| 140 return result; | |
| 141 } | |
| 142 // We assume this is already a Message. | |
| 143 value.parent = parent; | |
| 144 return value; | |
| 145 } | |
| 146 | |
| 147 /** | |
| 148 * Return a string representation of this message for use in generated Dart | |
| 149 * code. | |
| 150 */ | |
| 151 String toCode(); | |
| 152 | |
| 153 /** | |
| 154 * Escape the string for use in generated Dart code and validate that it | |
| 155 * doesn't doesn't contain any illegal interpolations. We only allow | |
| 156 * simple variables ("$foo", but not "${foo}") and Intl.gender/plural | |
| 157 * calls. | |
| 158 */ | |
| 159 String escapeAndValidateString(String value) { | |
| 160 const escapes = const { | |
| 161 r"\": r"\\", | |
| 162 '"': r'\"', | |
| 163 "\b": r"\b", | |
| 164 "\f": r"\f", | |
| 165 "\n": r"\n", | |
| 166 "\r": r"\r", | |
| 167 "\t": r"\t", | |
| 168 "\v": r"\v", | |
| 169 "'": r"\'", | |
| 170 }; | |
| 171 | |
| 172 _escape(String s) => (escapes[s] == null) ? s : escapes[s]; | |
| 173 | |
| 174 var escaped = value.splitMapJoin("", onNonMatch: _escape); | |
| 175 | |
| 176 // We don't allow any ${} expressions, only $variable to avoid malicious | |
| 177 // code. Disallow any usage of "${". If that makes a false positive | |
| 178 // on a translation that legitimately contains "\\${" or other variations, | |
| 179 // we'll live with that rather than risk a false negative. | |
| 180 var validInterpolations = new RegExp(r"(\$\w+)|(\${\w+})"); | |
| 181 var validMatches = validInterpolations.allMatches(escaped); | |
| 182 escapeInvalidMatches(Match m) { | |
| 183 var valid = validMatches.any((x) => x.start == m.start); | |
| 184 if (valid) { | |
| 185 return m.group(0); | |
| 186 } else { | |
| 187 return "\\${m.group(0)}"; | |
| 188 } | |
| 189 } | |
| 190 return escaped.replaceAllMapped("\$", escapeInvalidMatches); | |
| 191 } | |
| 192 | |
| 193 /** | |
| 194 * Expand this string out into a printed form. The function [f] will be | |
| 195 * applied to any sub-messages, allowing this to be used to generate a form | |
| 196 * suitable for a wide variety of translation file formats. | |
| 197 */ | |
| 198 String expanded([Function f]); | |
| 199 } | |
| 200 | |
| 201 /** | |
| 202 * Abstract class for messages with internal structure, representing the | |
| 203 * main Intl.message call, plurals, and genders. | |
| 204 */ | |
| 205 abstract class ComplexMessage extends Message { | |
| 206 ComplexMessage(parent) : super(parent); | |
| 207 | |
| 208 /** | |
| 209 * When we create these from strings or from AST nodes, we want to look up and | |
| 210 * set their attributes by string names, so we override the indexing operators | |
| 211 * so that they behave like maps with respect to those attribute names. | |
| 212 */ | |
| 213 operator [](x); | |
| 214 | |
| 215 /** | |
| 216 * When we create these from strings or from AST nodes, we want to look up and | |
| 217 * set their attributes by string names, so we override the indexing operators | |
| 218 * so that they behave like maps with respect to those attribute names. | |
| 219 */ | |
| 220 operator []=(x, y); | |
| 221 | |
| 222 List<String> get attributeNames; | |
| 223 | |
| 224 /** | |
| 225 * Return the name of the message type, as it will be generated into an | |
| 226 * ICU-type format. e.g. choice, select | |
| 227 */ | |
| 228 String get icuMessageName; | |
| 229 | |
| 230 /** | |
| 231 * Return the message name we would use for this when doing Dart code | |
| 232 * generation, e.g. "Intl.plural". | |
| 233 */ | |
| 234 String get dartMessageName; | |
| 235 } | |
| 236 | |
| 237 /** | |
| 238 * This represents a message chunk that is a list of multiple sub-pieces, | |
| 239 * each of which is in turn a [Message]. | |
| 240 */ | |
| 241 class CompositeMessage extends Message { | |
| 242 List<Message> pieces; | |
| 243 | |
| 244 CompositeMessage.withParent(parent) : super(parent); | |
| 245 CompositeMessage(this.pieces, ComplexMessage parent) : super(parent) { | |
| 246 pieces.forEach((x) => x.parent = this); | |
| 247 } | |
| 248 toCode() => pieces.map((each) => each.toCode()).join(''); | |
| 249 toString() => "CompositeMessage(" + pieces.toString() + ")"; | |
| 250 String expanded([Function f = _nullTransform]) => | |
| 251 pieces.map((chunk) => f(this, chunk)).join(""); | |
| 252 } | |
| 253 | |
| 254 /** Represents a simple constant string with no dynamic elements. */ | |
| 255 class LiteralString extends Message { | |
| 256 String string; | |
| 257 LiteralString(this.string, Message parent) : super(parent); | |
| 258 toCode() => escapeAndValidateString(string); | |
| 259 toString() => "Literal($string)"; | |
| 260 String expanded([Function f = _nullTransform]) => f(this, string); | |
| 261 } | |
| 262 | |
| 263 /** | |
| 264 * Represents an interpolation of a variable value in a message. We expect | |
| 265 * this to be specified as an [index] into the list of variables, or else | |
| 266 * as the name of a variable that exists in [arguments] and we will | |
| 267 * compute the variable name or the index based on the value of the other. | |
| 268 */ | |
| 269 class VariableSubstitution extends Message { | |
| 270 VariableSubstitution(this._index, Message parent) : super(parent); | |
| 271 | |
| 272 /** | |
| 273 * Create a substitution based on the name rather than the index. The name | |
| 274 * may have been used as all upper-case in the translation tool, so we | |
| 275 * save it separately and look it up case-insensitively once the parent | |
| 276 * (and its arguments) are definitely available. | |
| 277 */ | |
| 278 VariableSubstitution.named(String name, Message parent) : super(parent) { | |
| 279 _variableNameUpper = name.toUpperCase(); | |
| 280 } | |
| 281 | |
| 282 /** The index in the list of parameters of the containing function. */ | |
| 283 int _index; | |
| 284 int get index { | |
| 285 if (_index != null) return _index; | |
| 286 if (arguments.isEmpty) return null; | |
| 287 // We may have been given an all-uppercase version of the name, so compare | |
| 288 // case-insensitive. | |
| 289 _index = arguments | |
| 290 .map((x) => x.toUpperCase()) | |
| 291 .toList() | |
| 292 .indexOf(_variableNameUpper); | |
| 293 if (_index == -1) { | |
| 294 throw new ArgumentError( | |
| 295 "Cannot find parameter named '$_variableNameUpper' in " | |
| 296 "message named '$name'. Available " | |
| 297 "parameters are $arguments"); | |
| 298 } | |
| 299 return _index; | |
| 300 } | |
| 301 | |
| 302 /** | |
| 303 * The variable name we get from parsing. This may be an all uppercase version | |
| 304 * of the Dart argument name. | |
| 305 */ | |
| 306 String _variableNameUpper; | |
| 307 | |
| 308 /** | |
| 309 * The name of the variable in the parameter list of the containing function. | |
| 310 * Used when generating code for the interpolation. | |
| 311 */ | |
| 312 String get variableName => | |
| 313 _variableName == null ? _variableName = arguments[index] : _variableName; | |
| 314 String _variableName; | |
| 315 // Although we only allow simple variable references, we always enclose them | |
| 316 // in curly braces so that there's no possibility of ambiguity with | |
| 317 // surrounding text. | |
| 318 toCode() => "\${${variableName}}"; | |
| 319 toString() => "VariableSubstitution($index)"; | |
| 320 String expanded([Function f = _nullTransform]) => f(this, index); | |
| 321 } | |
| 322 | |
| 323 class MainMessage extends ComplexMessage { | |
| 324 MainMessage() : super(null); | |
| 325 | |
| 326 /** | |
| 327 * All the pieces of the message. When we go to print, these will | |
| 328 * all be expanded appropriately. The exact form depends on what we're | |
| 329 * printing it for See [expanded], [toCode]. | |
| 330 */ | |
| 331 List<Message> messagePieces = []; | |
| 332 | |
| 333 /** Verify that this looks like a correct Intl.message invocation. */ | |
| 334 String checkValidity(MethodInvocation node, List arguments, String outerName, | |
| 335 FormalParameterList outerArgs) { | |
| 336 if (arguments.first is! StringLiteral) { | |
| 337 return "Intl.message messages must be string literals"; | |
| 338 } | |
| 339 | |
| 340 return super.checkValidity(node, arguments, outerName, outerArgs); | |
| 341 } | |
| 342 | |
| 343 void addPieces(List<Message> messages) { | |
| 344 for (var each in messages) { | |
| 345 messagePieces.add(Message.from(each, this)); | |
| 346 } | |
| 347 } | |
| 348 | |
| 349 /** The description provided in the Intl.message call. */ | |
| 350 String description; | |
| 351 | |
| 352 /** The examples from the Intl.message call */ | |
| 353 Map<String, dynamic> examples; | |
| 354 | |
| 355 /** | |
| 356 * A field to disambiguate two messages that might have exactly the | |
| 357 * same text. The two messages will also need different names, but | |
| 358 * this can be used by machine translation tools to distinguish them. | |
| 359 */ | |
| 360 String meaning; | |
| 361 | |
| 362 /** | |
| 363 * The name, which may come from the function name, from the arguments | |
| 364 * to Intl.message, or we may just re-use the message. | |
| 365 */ | |
| 366 String _name; | |
| 367 | |
| 368 /** | |
| 369 * A placeholder for any other identifier that the translation format | |
| 370 * may want to use. | |
| 371 */ | |
| 372 String id; | |
| 373 | |
| 374 /** The arguments list from the Intl.message call. */ | |
| 375 List arguments; | |
| 376 | |
| 377 /** | |
| 378 * When generating code, we store translations for each locale | |
| 379 * associated with the original message. | |
| 380 */ | |
| 381 Map<String, String> translations = new Map(); | |
| 382 | |
| 383 /** | |
| 384 * If the message was not given a name, we use the entire message string as | |
| 385 * the name. | |
| 386 */ | |
| 387 String get name => _name == null ? computeName() : _name; | |
| 388 set name(String newName) { | |
| 389 _name = newName; | |
| 390 } | |
| 391 | |
| 392 String computeName() => name = expanded((msg, chunk) => ""); | |
| 393 | |
| 394 /** | |
| 395 * Return the full message, with any interpolation expressions transformed | |
| 396 * by [f] and all the results concatenated. The chunk argument to [f] may be | |
| 397 * either a String, an int or an object representing a more complex | |
| 398 * message entity. | |
| 399 * See [messagePieces]. | |
| 400 */ | |
| 401 String expanded([Function f = _nullTransform]) => | |
| 402 messagePieces.map((chunk) => f(this, chunk)).join(""); | |
| 403 | |
| 404 /** | |
| 405 * Record the translation for this message in the given locale, after | |
| 406 * suitably escaping it. | |
| 407 */ | |
| 408 void addTranslation(String locale, Message translated) { | |
| 409 translated.parent = this; | |
| 410 translations[locale] = translated.toCode(); | |
| 411 } | |
| 412 | |
| 413 toCode() => | |
| 414 throw new UnsupportedError("MainMessage.toCode requires a locale"); | |
| 415 | |
| 416 /** | |
| 417 * Generate code for this message, expecting it to be part of a map | |
| 418 * keyed by name with values the function that calls Intl.message. | |
| 419 */ | |
| 420 String toCodeForLocale(String locale) { | |
| 421 var out = new StringBuffer() | |
| 422 ..write('static $name(') | |
| 423 ..write(arguments.join(", ")) | |
| 424 ..write(') => "') | |
| 425 ..write(translations[locale]) | |
| 426 ..write('";'); | |
| 427 return out.toString(); | |
| 428 } | |
| 429 | |
| 430 /** | |
| 431 * The AST node will have the attribute names as strings, so we translate | |
| 432 * between those and the fields of the class. | |
| 433 */ | |
| 434 void operator []=(attributeName, value) { | |
| 435 switch (attributeName) { | |
| 436 case "desc": | |
| 437 description = value; | |
| 438 return; | |
| 439 case "examples": | |
| 440 examples = value; | |
| 441 return; | |
| 442 case "name": | |
| 443 name = value; | |
| 444 return; | |
| 445 // We use the actual args from the parser rather than what's given in the | |
| 446 // arguments to Intl.message. | |
| 447 case "args": | |
| 448 return; | |
| 449 case "meaning": | |
| 450 meaning = value; | |
| 451 return; | |
| 452 default: | |
| 453 return; | |
| 454 } | |
| 455 } | |
| 456 | |
| 457 /** | |
| 458 * The AST node will have the attribute names as strings, so we translate | |
| 459 * between those and the fields of the class. | |
| 460 */ | |
| 461 operator [](attributeName) { | |
| 462 switch (attributeName) { | |
| 463 case "desc": | |
| 464 return description; | |
| 465 case "examples": | |
| 466 return examples; | |
| 467 case "name": | |
| 468 return name; | |
| 469 // We use the actual args from the parser rather than what's given in the | |
| 470 // arguments to Intl.message. | |
| 471 case "args": | |
| 472 return []; | |
| 473 case "meaning": | |
| 474 return meaning; | |
| 475 default: | |
| 476 return null; | |
| 477 } | |
| 478 } | |
| 479 | |
| 480 // This is the top-level construct, so there's no meaningful ICU name. | |
| 481 get icuMessageName => ''; | |
| 482 | |
| 483 get dartMessageName => "message"; | |
| 484 | |
| 485 /** The parameters that the Intl.message call may provide. */ | |
| 486 get attributeNames => const ["name", "desc", "examples", "args", "meaning"]; | |
| 487 | |
| 488 String toString() => | |
| 489 "Intl.message(${expanded()}, $name, $description, $examples, $arguments)"; | |
| 490 } | |
| 491 | |
| 492 /** | |
| 493 * An abstract class to represent sub-sections of a message, primarily | |
| 494 * plurals and genders. | |
| 495 */ | |
| 496 abstract class SubMessage extends ComplexMessage { | |
| 497 SubMessage() : super(null); | |
| 498 | |
| 499 /** | |
| 500 * Creates the sub-message, given a list of [clauses] in the sort of form | |
| 501 * that we're likely to get them from parsing a translation file format, | |
| 502 * as a list of [key, value] where value may in turn be a list. | |
| 503 */ | |
| 504 SubMessage.from(this.mainArgument, List clauses, parent) : super(parent) { | |
| 505 for (var clause in clauses) { | |
| 506 this[clause.first] = (clause.last is List) ? clause.last : [clause.last]; | |
| 507 } | |
| 508 } | |
| 509 | |
| 510 toString() => expanded(); | |
| 511 | |
| 512 /** | |
| 513 * The name of the main argument, which is expected to have the value | |
| 514 * which is one of [attributeNames] and is used to decide which clause to use. | |
| 515 */ | |
| 516 String mainArgument; | |
| 517 | |
| 518 /** | |
| 519 * Return the arguments that affect this SubMessage as a map of | |
| 520 * argument names and values. | |
| 521 */ | |
| 522 Map argumentsOfInterestFor(MethodInvocation node) { | |
| 523 var basicArguments = node.argumentList.arguments; | |
| 524 var others = basicArguments.where((each) => each is NamedExpression); | |
| 525 return new Map.fromIterable(others, | |
| 526 key: (node) => node.name.label.token.value(), | |
| 527 value: (node) => node.expression); | |
| 528 } | |
| 529 | |
| 530 /** | |
| 531 * Return the list of attribute names to use when generating code. This | |
| 532 * may be different from [attributeNames] if there are multiple aliases | |
| 533 * that map to the same clause. | |
| 534 */ | |
| 535 List<String> get codeAttributeNames; | |
| 536 | |
| 537 String expanded([Function transform = _nullTransform]) { | |
| 538 fullMessageForClause(key) => | |
| 539 key + '{' + transform(parent, this[key]).toString() + '}'; | |
| 540 var clauses = attributeNames | |
| 541 .where((key) => this[key] != null) | |
| 542 .map(fullMessageForClause) | |
| 543 .toList(); | |
| 544 return "{$mainArgument,$icuMessageName, ${clauses.join("")}}"; | |
| 545 } | |
| 546 | |
| 547 String toCode() { | |
| 548 var out = new StringBuffer(); | |
| 549 out.write('\${'); | |
| 550 out.write(dartMessageName); | |
| 551 out.write('('); | |
| 552 out.write(mainArgument); | |
| 553 var args = codeAttributeNames.where((attribute) => this[attribute] != null); | |
| 554 args.fold( | |
| 555 out, (buffer, arg) => buffer..write(", $arg: '${this[arg].toCode()}'")); | |
| 556 out.write(")}"); | |
| 557 return out.toString(); | |
| 558 } | |
| 559 } | |
| 560 | |
| 561 /** | |
| 562 * Represents a message send of [Intl.gender] inside a message that is to | |
| 563 * be internationalized. This corresponds to an ICU message syntax "select" | |
| 564 * with "male", "female", and "other" as the possible options. | |
| 565 */ | |
| 566 class Gender extends SubMessage { | |
| 567 Gender(); | |
| 568 /** | |
| 569 * Create a new Gender providing [mainArgument] and the list of possible | |
| 570 * clauses. Each clause is expected to be a list whose first element is a | |
| 571 * variable name and whose second element is either a [String] or | |
| 572 * a list of strings and [Message] or [VariableSubstitution]. | |
| 573 */ | |
| 574 Gender.from(String mainArgument, List clauses, Message parent) | |
| 575 : super.from(mainArgument, clauses, parent); | |
| 576 | |
| 577 Message female; | |
| 578 Message male; | |
| 579 Message other; | |
| 580 | |
| 581 String get icuMessageName => "select"; | |
| 582 String get dartMessageName => 'Intl.gender'; | |
| 583 | |
| 584 get attributeNames => ["female", "male", "other"]; | |
| 585 get codeAttributeNames => attributeNames; | |
| 586 | |
| 587 /** | |
| 588 * The node will have the attribute names as strings, so we translate | |
| 589 * between those and the fields of the class. | |
| 590 */ | |
| 591 void operator []=(attributeName, rawValue) { | |
| 592 var value = Message.from(rawValue, this); | |
| 593 switch (attributeName) { | |
| 594 case "female": | |
| 595 female = value; | |
| 596 return; | |
| 597 case "male": | |
| 598 male = value; | |
| 599 return; | |
| 600 case "other": | |
| 601 other = value; | |
| 602 return; | |
| 603 default: | |
| 604 return; | |
| 605 } | |
| 606 } | |
| 607 Message operator [](String attributeName) { | |
| 608 switch (attributeName) { | |
| 609 case "female": | |
| 610 return female; | |
| 611 case "male": | |
| 612 return male; | |
| 613 case "other": | |
| 614 return other; | |
| 615 default: | |
| 616 return other; | |
| 617 } | |
| 618 } | |
| 619 } | |
| 620 | |
| 621 class Plural extends SubMessage { | |
| 622 Plural(); | |
| 623 Plural.from(String mainArgument, List clauses, Message parent) | |
| 624 : super.from(mainArgument, clauses, parent); | |
| 625 | |
| 626 Message zero; | |
| 627 Message one; | |
| 628 Message two; | |
| 629 Message few; | |
| 630 Message many; | |
| 631 Message other; | |
| 632 | |
| 633 String get icuMessageName => "plural"; | |
| 634 String get dartMessageName => "Intl.plural"; | |
| 635 | |
| 636 get attributeNames => ["=0", "=1", "=2", "few", "many", "other"]; | |
| 637 get codeAttributeNames => ["zero", "one", "two", "few", "many", "other"]; | |
| 638 | |
| 639 /** | |
| 640 * The node will have the attribute names as strings, so we translate | |
| 641 * between those and the fields of the class. | |
| 642 */ | |
| 643 void operator []=(String attributeName, rawValue) { | |
| 644 var value = Message.from(rawValue, this); | |
| 645 switch (attributeName) { | |
| 646 case "zero": | |
| 647 zero = value; | |
| 648 return; | |
| 649 case "=0": | |
| 650 zero = value; | |
| 651 return; | |
| 652 case "one": | |
| 653 one = value; | |
| 654 return; | |
| 655 case "=1": | |
| 656 one = value; | |
| 657 return; | |
| 658 case "two": | |
| 659 two = value; | |
| 660 return; | |
| 661 case "=2": | |
| 662 two = value; | |
| 663 return; | |
| 664 case "few": | |
| 665 few = value; | |
| 666 return; | |
| 667 case "many": | |
| 668 many = value; | |
| 669 return; | |
| 670 case "other": | |
| 671 other = value; | |
| 672 return; | |
| 673 default: | |
| 674 return; | |
| 675 } | |
| 676 } | |
| 677 | |
| 678 Message operator [](String attributeName) { | |
| 679 switch (attributeName) { | |
| 680 case "zero": | |
| 681 return zero; | |
| 682 case "=0": | |
| 683 return zero; | |
| 684 case "one": | |
| 685 return one; | |
| 686 case "=1": | |
| 687 return one; | |
| 688 case "two": | |
| 689 return two; | |
| 690 case "=2": | |
| 691 return two; | |
| 692 case "few": | |
| 693 return few; | |
| 694 case "many": | |
| 695 return many; | |
| 696 case "other": | |
| 697 return other; | |
| 698 default: | |
| 699 return other; | |
| 700 } | |
| 701 } | |
| 702 } | |
| 703 | |
| 704 /** | |
| 705 * Represents a message send of [Intl.select] inside a message that is to | |
| 706 * be internationalized. This corresponds to an ICU message syntax "select" | |
| 707 * with arbitrary options. | |
| 708 */ | |
| 709 class Select extends SubMessage { | |
| 710 Select(); | |
| 711 /** | |
| 712 * Create a new [Select] providing [mainArgument] and the list of possible | |
| 713 * clauses. Each clause is expected to be a list whose first element is a | |
| 714 * variable name and whose second element is either a String or | |
| 715 * a list of strings and [Message]s or [VariableSubstitution]s. | |
| 716 */ | |
| 717 Select.from(String mainArgument, List clauses, Message parent) | |
| 718 : super.from(mainArgument, clauses, parent); | |
| 719 | |
| 720 Map<String, Message> cases = new Map<String, Message>(); | |
| 721 | |
| 722 String get icuMessageName => "select"; | |
| 723 String get dartMessageName => 'Intl.select'; | |
| 724 | |
| 725 get attributeNames => cases.keys; | |
| 726 get codeAttributeNames => attributeNames; | |
| 727 | |
| 728 void operator []=(attributeName, rawValue) { | |
| 729 var value = Message.from(rawValue, this); | |
| 730 cases[attributeName] = value; | |
| 731 } | |
| 732 | |
| 733 Message operator [](String attributeName) { | |
| 734 var exact = cases[attributeName]; | |
| 735 return exact == null ? cases["other"] : exact; | |
| 736 } | |
| 737 | |
| 738 /** | |
| 739 * Return the arguments that we care about for the select. In this | |
| 740 * case they will all be passed in as a Map rather than as the named | |
| 741 * arguments used in Plural/Gender. | |
| 742 */ | |
| 743 Map argumentsOfInterestFor(MethodInvocation node) { | |
| 744 var casesArgument = node.argumentList.arguments[1]; | |
| 745 return new Map.fromIterable(casesArgument.entries, | |
| 746 key: (node) => node.key.value, value: (node) => node.value); | |
| 747 } | |
| 748 | |
| 749 /** | |
| 750 * Write out the generated representation of this message. This differs | |
| 751 * from Plural/Gender in that it prints a literal map rather than | |
| 752 * named arguments. | |
| 753 */ | |
| 754 String toCode() { | |
| 755 var out = new StringBuffer(); | |
| 756 out.write('\${'); | |
| 757 out.write(dartMessageName); | |
| 758 out.write('('); | |
| 759 out.write(mainArgument); | |
| 760 var args = codeAttributeNames; | |
| 761 out.write(", {"); | |
| 762 args.fold(out, | |
| 763 (buffer, arg) => buffer..write("'$arg': '${this[arg].toCode()}', ")); | |
| 764 out.write("})}"); | |
| 765 return out.toString(); | |
| 766 } | |
| 767 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1400473008:
Roll Observatory packages and add a roll script (Closed)
Base URL: git@github.com:dart-lang/observatory_pub_packages.git@master