| OLD | NEW |
|---|
| (Empty) |
| 1 #!/usr/bin/python | |
| 2 # Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | |
| 3 # for details. All rights reserved. Use of this source code is governed by a | |
| 4 # BSD-style license that can be found in the LICENSE file. | |
| 5 | |
| 6 import re | |
| 7 import subprocess | |
| 8 import tempfile | |
| 9 | |
| 10 from pegparser import * | |
| 11 | |
| 12 # IDL grammar variants. | |
| 13 WEBIDL_SYNTAX = 0 | |
| 14 WEBKIT_SYNTAX = 1 | |
| 15 FREMONTCUT_SYNTAX = 2 | |
| 16 | |
| 17 | |
| 18 class IDLParser(object): | |
| 19 """IDLParser is a PEG based IDL files parser.""" | |
| 20 | |
| 21 def __init__(self, syntax=WEBIDL_SYNTAX): | |
| 22 """Constructor. | |
| 23 | |
| 24 Initializes the IDLParser by defining the grammar and initializing | |
| 25 a PEGParserinstance. | |
| 26 | |
| 27 Args: | |
| 28 syntax -- supports either WEBIDL_SYNTAX (0) or WEBKIT_SYNTAX (1) | |
| 29 """ | |
| 30 self._syntax = syntax | |
| 31 self._pegparser = PegParser(self._idl_grammar(), | |
| 32 self._whitespace_grammar(), | |
| 33 strings_are_tokens=True) | |
| 34 | |
| 35 def _idl_grammar(self): | |
| 36 """Returns the PEG grammar for IDL parsing.""" | |
| 37 | |
| 38 # utilities: | |
| 39 def syntax_switch(w3c_syntax, webkit_syntax, fremontcut_syntax=None): | |
| 40 """Returns w3c_syntax or web_syntax, depending on the current | |
| 41 configuration. | |
| 42 """ | |
| 43 if self._syntax == WEBIDL_SYNTAX: | |
| 44 return w3c_syntax | |
| 45 elif self._syntax == WEBKIT_SYNTAX: | |
| 46 return webkit_syntax | |
| 47 elif self._syntax == FREMONTCUT_SYNTAX: | |
| 48 if fremontcut_syntax is not None: | |
| 49 return fremontcut_syntax | |
| 50 return w3c_syntax | |
| 51 else: | |
| 52 raise RuntimeError('unsupported IDL syntax %s' % syntax) | |
| 53 | |
| 54 # The following grammar is based on the Web IDL's LL(1) grammar | |
| 55 # (specified in: http://dev.w3.org/2006/webapi/WebIDL/#idl-grammar). | |
| 56 # It is adjusted to PEG grammar, as well as to also support | |
| 57 # WebKit IDL and FremontCut grammar. | |
| 58 | |
| 59 ###################### BEGIN GRAMMAR ##################### | |
| 60 | |
| 61 def Id(): | |
| 62 return re.compile(r'[\w\_]+') | |
| 63 | |
| 64 def _Definitions(): | |
| 65 return MAYBE(MANY(_Definition)) | |
| 66 | |
| 67 def _Definition(): | |
| 68 return syntax_switch( | |
| 69 # Web IDL: | |
| 70 OR(Module, Interface, ExceptionDef, TypeDef, ImplStmt, | |
| 71 ValueTypeDef, Const), | |
| 72 # WebKit: | |
| 73 OR(Module, Interface)) | |
| 74 | |
| 75 def Module(): | |
| 76 return syntax_switch( | |
| 77 # Web IDL: | |
| 78 [MAYBE(ExtAttrs), 'module', Id, '{', _Definitions, '}', | |
| 79 MAYBE(';')], | |
| 80 # WebKit: | |
| 81 ['module', MAYBE(ExtAttrs), Id, '{', _Definitions, '}', | |
| 82 MAYBE(';')], | |
| 83 # FremontCut: | |
| 84 [MAYBE(_Annotations), MAYBE(ExtAttrs), 'module', Id, | |
| 85 '{', _Definitions, '}', MAYBE(';')]) | |
| 86 | |
| 87 def Interface(): | |
| 88 return syntax_switch( | |
| 89 # Web IDL: | |
| 90 [MAYBE(ExtAttrs), 'interface', Id, MAYBE(_ParentInterfaces), | |
| 91 MAYBE(['{', MAYBE(MANY(_Member)), '}']), ';'], | |
| 92 # WebKit: | |
| 93 ['interface', MAYBE(ExtAttrs), Id, MAYBE(_ParentInterfaces), | |
| 94 MAYBE(['{', MAYBE(MANY(_Member)), '}']), MAYBE(';')], | |
| 95 # FremontCut: | |
| 96 [MAYBE(_Annotations), MAYBE(ExtAttrs), 'interface', | |
| 97 Id, MAYBE(_ParentInterfaces), MAYBE(['{', MAYBE(MANY(_Member)), | |
| 98 '}']), ';']) | |
| 99 | |
| 100 def _Member(): | |
| 101 return syntax_switch( | |
| 102 # Web IDL: | |
| 103 OR(Const, Attribute, Operation, ExtAttrs), | |
| 104 # WebKit: | |
| 105 OR(Const, Attribute, Operation), | |
| 106 # FremontCut: | |
| 107 OR(Const, Attribute, Operation)) | |
| 108 | |
| 109 # Interface inheritance: | |
| 110 def _ParentInterfaces(): | |
| 111 return [':', MANY(ParentInterface, separator=',')] | |
| 112 | |
| 113 def ParentInterface(): | |
| 114 return syntax_switch( | |
| 115 # Web IDL: | |
| 116 [InterfaceType], | |
| 117 # WebKit: | |
| 118 [InterfaceType], | |
| 119 # FremontCut: | |
| 120 [MAYBE(_Annotations), InterfaceType]) | |
| 121 | |
| 122 # TypeDef (Web IDL): | |
| 123 def TypeDef(): | |
| 124 return ['typedef', Type, Id, ';'] | |
| 125 | |
| 126 # TypeDef (Old-school W3C IDLs) | |
| 127 def ValueTypeDef(): | |
| 128 return ['valuetype', Id, Type, ';'] | |
| 129 | |
| 130 # Implements Statement (Web IDL): | |
| 131 def ImplStmt(): | |
| 132 return [ImplStmtImplementor, 'implements', ImplStmtImplemented, | |
| 133 ';'] | |
| 134 | |
| 135 def ImplStmtImplementor(): | |
| 136 return ScopedName | |
| 137 | |
| 138 def ImplStmtImplemented(): | |
| 139 return ScopedName | |
| 140 | |
| 141 # Constants: | |
| 142 def Const(): | |
| 143 return syntax_switch( | |
| 144 # Web IDL: | |
| 145 [MAYBE(ExtAttrs), 'const', Type, Id, '=', ConstExpr, ';'], | |
| 146 # WebKit: | |
| 147 [MAYBE(ExtAttrs), 'const', Type, Id, '=', ConstExpr, ';'], | |
| 148 # FremontCut: | |
| 149 [MAYBE(_Annotations), MAYBE(ExtAttrs), 'const', Type, Id, '=', | |
| 150 ConstExpr, ';']) | |
| 151 | |
| 152 def ConstExpr(): | |
| 153 return OR(_BooleanLiteral, | |
| 154 _IntegerLiteral, | |
| 155 _FloatLiteral) | |
| 156 | |
| 157 def _BooleanLiteral(): | |
| 158 return re.compile(r'true|false') | |
| 159 | |
| 160 def _IntegerLiteral(): | |
| 161 return OR(re.compile(r'(0x)?[0-9ABCDEF]+'), | |
| 162 re.compile(r'[0-9]+')) | |
| 163 | |
| 164 def _FloatLiteral(): | |
| 165 return re.compile(r'[0-9]+\.[0-9]*') | |
| 166 | |
| 167 # Attributes: | |
| 168 def Attribute(): | |
| 169 return syntax_switch( | |
| 170 # Web IDL: | |
| 171 [MAYBE(ExtAttrs), MAYBE(Stringifier), MAYBE(ReadOnly), | |
| 172 'attribute', Type, Id, MAYBE(_AttrRaises), ';'], | |
| 173 # WebKit: | |
| 174 [MAYBE(Stringifier), MAYBE(ReadOnly), 'attribute', | |
| 175 MAYBE(ExtAttrs), Type, Id, MAYBE(_AttrRaises), ';'], | |
| 176 # FremontCut: | |
| 177 [MAYBE(_Annotations), MAYBE(ExtAttrs), | |
| 178 MAYBE(_AttrGetterSetter), MAYBE(Stringifier), MAYBE(ReadOnly), | |
| 179 'attribute', Type, Id, MAYBE(_AttrRaises), ';']) | |
| 180 | |
| 181 def _AttrRaises(): | |
| 182 return syntax_switch( | |
| 183 # Web IDL: | |
| 184 MANY(OR(GetRaises, SetRaises)), | |
| 185 # WebKit: | |
| 186 MANY(OR(GetRaises, SetRaises, Raises), separator=',')) | |
| 187 | |
| 188 # Special fremontcut feature: | |
| 189 def _AttrGetterSetter(): | |
| 190 return OR(AttrGetter, AttrSetter) | |
| 191 | |
| 192 def AttrGetter(): | |
| 193 return 'getter' | |
| 194 | |
| 195 def AttrSetter(): | |
| 196 return 'setter' | |
| 197 | |
| 198 def ReadOnly(): | |
| 199 return 'readonly' | |
| 200 | |
| 201 def GetRaises(): | |
| 202 return syntax_switch( | |
| 203 # Web IDL: | |
| 204 ['getraises', '(', _ScopedNames, ')'], | |
| 205 # WebKit: | |
| 206 ['getter', 'raises', '(', _ScopedNames, ')']) | |
| 207 | |
| 208 def SetRaises(): | |
| 209 return syntax_switch( | |
| 210 # Web IDL: | |
| 211 ['setraises', '(', _ScopedNames, ')'], | |
| 212 # WebKit: | |
| 213 ['setter', 'raises', '(', _ScopedNames, ')']) | |
| 214 | |
| 215 # Operation: | |
| 216 def Operation(): | |
| 217 return syntax_switch( | |
| 218 # Web IDL: | |
| 219 [MAYBE(ExtAttrs), MAYBE(Static), MAYBE(Stringifier), MAYBE(_Specials), | |
| 220 ReturnType, MAYBE(Id), '(', _Arguments, ')', MAYBE(Raises), | |
| 221 ';'], | |
| 222 # WebKit: | |
| 223 [MAYBE(ExtAttrs), MAYBE(Static), | |
| 224 ReturnType, MAYBE(Id), '(', _Arguments, ')', | |
| 225 MAYBE(Raises), ';'], | |
| 226 # FremontCut: | |
| 227 [MAYBE(_Annotations), MAYBE(ExtAttrs), MAYBE(Static), MAYBE(Stringifier)
, | |
| 228 MAYBE(_Specials), ReturnType, MAYBE(Id), '(', _Arguments, ')', | |
| 229 MAYBE(Raises), ';']) | |
| 230 | |
| 231 def Static(): | |
| 232 return 'static' | |
| 233 | |
| 234 def _Specials(): | |
| 235 return MANY(Special) | |
| 236 | |
| 237 def Special(): | |
| 238 return re.compile(r'getter|setter|creator|deleter|caller') | |
| 239 | |
| 240 def Stringifier(): | |
| 241 return 'stringifier' | |
| 242 | |
| 243 def Raises(): | |
| 244 return ['raises', '(', _ScopedNames, ')'] | |
| 245 | |
| 246 # Operation arguments: | |
| 247 def _Arguments(): | |
| 248 return MAYBE(MANY(Argument, ',')) | |
| 249 | |
| 250 def Argument(): | |
| 251 return syntax_switch( | |
| 252 # Web IDL: | |
| 253 [MAYBE(ExtAttrs), MAYBE(Optional), MAYBE('in'), | |
| 254 MAYBE(Optional), Type, MAYBE(AnEllipsis), Id], | |
| 255 # WebKit: | |
| 256 [MAYBE(Optional), MAYBE('in'), MAYBE(Optional), | |
| 257 MAYBE(ExtAttrs), Type, Id]) | |
| 258 | |
| 259 def Optional(): | |
| 260 return 'optional' | |
| 261 | |
| 262 def AnEllipsis(): | |
| 263 return '...' | |
| 264 | |
| 265 # Exceptions (Web IDL). | |
| 266 def ExceptionDef(): | |
| 267 return ['exception', Id, '{', MAYBE(MANY(_ExceptionMember)), '}', | |
| 268 ';'] | |
| 269 | |
| 270 def _ExceptionMember(): | |
| 271 return OR(Const, ExceptionField, ExtAttrs) | |
| 272 | |
| 273 def ExceptionField(): | |
| 274 return [Type, Id, ';'] | |
| 275 | |
| 276 # Types: | |
| 277 def Type(): | |
| 278 return _Type | |
| 279 | |
| 280 def ReturnType(): | |
| 281 return OR(VoidType, _Type) | |
| 282 | |
| 283 def InterfaceType(): | |
| 284 return ScopedName | |
| 285 | |
| 286 def _Type(): | |
| 287 return OR(AnyArrayType, AnyType, ObjectType, _NullableType) | |
| 288 | |
| 289 def _NullableType(): | |
| 290 return [OR(_IntegerType, BooleanType, OctetType, FloatType, | |
| 291 DoubleType, SequenceType, DOMStringArrayType, ScopedName), | |
| 292 MAYBE(Nullable)] | |
| 293 | |
| 294 def Nullable(): | |
| 295 return '?' | |
| 296 | |
| 297 def SequenceType(): | |
| 298 return ['sequence', '<', Type, '>'] | |
| 299 | |
| 300 def AnyType(): | |
| 301 return 'any' | |
| 302 | |
| 303 def AnyArrayType(): | |
| 304 # TODO(sra): Do more general handling of array types. | |
| 305 return 'any[]' | |
| 306 | |
| 307 def ObjectType(): | |
| 308 return re.compile(r'(object|Object)\b') # both spellings. | |
| 309 | |
| 310 def VoidType(): | |
| 311 return 'void' | |
| 312 | |
| 313 def _IntegerType(): | |
| 314 return [MAYBE(Unsigned), OR(ByteType, IntType, LongLongType, | |
| 315 LongType, OctetType, ShortType)] | |
| 316 | |
| 317 def Unsigned(): | |
| 318 return 'unsigned' | |
| 319 | |
| 320 def ShortType(): | |
| 321 return 'short' | |
| 322 | |
| 323 def LongLongType(): | |
| 324 return ['long', 'long'] | |
| 325 | |
| 326 def LongType(): | |
| 327 return 'long' | |
| 328 | |
| 329 def IntType(): | |
| 330 return 'int' | |
| 331 | |
| 332 def ByteType(): | |
| 333 return 'byte' | |
| 334 | |
| 335 def OctetType(): | |
| 336 return 'octet' | |
| 337 | |
| 338 def BooleanType(): | |
| 339 return 'boolean' | |
| 340 | |
| 341 def FloatType(): | |
| 342 return 'float' | |
| 343 | |
| 344 def DoubleType(): | |
| 345 return 'double' | |
| 346 | |
| 347 def _ScopedNames(): | |
| 348 return MANY(ScopedName, separator=',') | |
| 349 | |
| 350 def ScopedName(): | |
| 351 return re.compile(r'[\w\_\:\.\<\>]+') | |
| 352 | |
| 353 def DOMStringArrayType(): | |
| 354 return 'DOMString[]' | |
| 355 | |
| 356 # Extended Attributes: | |
| 357 def ExtAttrs(): | |
| 358 return ['[', MAYBE(MANY(ExtAttr, ',')), ']'] | |
| 359 | |
| 360 def ExtAttr(): | |
| 361 return [Id, MAYBE(OR(['=', ExtAttrValue], ExtAttrArgList))] | |
| 362 | |
| 363 def ExtAttrValue(): | |
| 364 return OR(ExtAttrFunctionValue, re.compile(r'[\w&0-9:\-\|]+')) | |
| 365 | |
| 366 def ExtAttrFunctionValue(): | |
| 367 return [Id, ExtAttrArgList] | |
| 368 | |
| 369 def ExtAttrArgList(): | |
| 370 return ['(', MAYBE(MANY(Argument, ',')), ')'] | |
| 371 | |
| 372 # Annotations - used in the FremontCut IDL grammar: | |
| 373 def _Annotations(): | |
| 374 return MANY(Annotation) | |
| 375 | |
| 376 def Annotation(): | |
| 377 return ['@', Id, MAYBE(_AnnotationBody)] | |
| 378 | |
| 379 def _AnnotationBody(): | |
| 380 return ['(', MAYBE(MANY(AnnotationArg, ',')), ')'] | |
| 381 | |
| 382 def AnnotationArg(): | |
| 383 return [Id, MAYBE(['=', AnnotationArgValue])] | |
| 384 | |
| 385 def AnnotationArgValue(): | |
| 386 return re.compile(r'[\w&0-9:/\-\.]+') | |
| 387 | |
| 388 ###################### END GRAMMAR ##################### | |
| 389 | |
| 390 # Return the grammar's root rule: | |
| 391 return MANY(_Definition) | |
| 392 | |
| 393 def _whitespace_grammar(self): | |
| 394 return OR(re.compile(r'\s+'), | |
| 395 re.compile(r'//.*'), | |
| 396 re.compile(r'#.*'), | |
| 397 re.compile(r'/\*.*?\*/', re.S)) | |
| 398 | |
| 399 def _pre_process(self, content, defines, includePaths): | |
| 400 """Pre-processes the content using gcc. | |
| 401 | |
| 402 WebKit IDLs require pre-processing by gcc. This is done by invoking | |
| 403 gcc in a sub-process and capturing the results. | |
| 404 | |
| 405 Returns: | |
| 406 The result of running gcc on the content. | |
| 407 | |
| 408 Args: | |
| 409 content -- text to process. | |
| 410 defines -- an array of pre-processor defines. | |
| 411 includePaths -- an array of path strings. | |
| 412 """ | |
| 413 # FIXME: Handle gcc not found, or any other processing errors | |
| 414 gcc = 'gcc' | |
| 415 cmd = [gcc, '-E', '-P', '-C', '-x', 'c++']; | |
| 416 for define in defines: | |
| 417 cmd.append('-D%s' % define) | |
| 418 cmd.append('-') | |
| 419 pipe = subprocess.Popen(cmd, stdin=subprocess.PIPE, | |
| 420 stdout=subprocess.PIPE, stderr=subprocess.PIPE) | |
| 421 (content, stderr) = pipe.communicate(content) | |
| 422 return content | |
| 423 | |
| 424 def parse(self, content, defines=[], includePaths=[]): | |
| 425 """Parse the give content string. | |
| 426 | |
| 427 The WebKit IDL syntax also allows gcc pre-processing instructions. | |
| 428 Lists of defined variables and include paths can be provided. | |
| 429 | |
| 430 Returns: | |
| 431 An abstract syntax tree (AST). | |
| 432 | |
| 433 Args: | |
| 434 content -- text to parse. | |
| 435 defines -- an array of pre-processor defines. | |
| 436 includePaths -- an array of path strings used by the | |
| 437 gcc pre-processor. | |
| 438 """ | |
| 439 if self._syntax == WEBKIT_SYNTAX: | |
| 440 content = self._pre_process(content, defines, includePaths) | |
| 441 | |
| 442 return self._pegparser.parse(content) | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 9845043:
Rename client/{dom,html} to lib/{dom,html} . (Closed)
Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/