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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 part of csslib.visitor; | |
| 6 | |
| 7 /** | |
| 8 * Visitor that produces a formatted string representation of the CSS tree. | |
| 9 */ | |
| 10 class CssPrinter extends Visitor { | |
| 11 StringBuffer _buff = new StringBuffer(); | |
| 12 bool prettyPrint = true; | |
| 13 | |
| 14 /** | |
| 15 * Walk the [tree] Stylesheet. [pretty] if true emits line breaks, extra | |
| 16 * spaces, friendly property values, etc., if false emits compacted output. | |
| 17 */ | |
| 18 void visitTree(StyleSheet tree, {bool pretty: false}) { | |
| 19 prettyPrint = pretty; | |
| 20 _buff = new StringBuffer(); | |
| 21 visitStyleSheet(tree); | |
| 22 } | |
| 23 | |
| 24 /** Appends [str] to the output buffer. */ | |
| 25 void emit(String str) { | |
| 26 _buff.write(str); | |
| 27 } | |
| 28 | |
| 29 /** Returns the output buffer. */ | |
| 30 String toString() => _buff.toString().trim(); | |
| 31 | |
| 32 String get _newLine => prettyPrint ? '\n' : ' '; | |
| 33 String get _sp => prettyPrint ? ' ' : ''; | |
| 34 | |
| 35 // TODO(terry): When adding obfuscation we'll need isOptimized (compact w/ | |
| 36 // obufuscation) and have isTesting (compact no obfuscation) and | |
| 37 // isCompact would be !prettyPrint. We'll need another boolean | |
| 38 // flag for obfuscation. | |
| 39 bool get _isTesting => !prettyPrint; | |
| 40 | |
| 41 void visitCssComment(CssComment node) { | |
| 42 emit('/* ${node.comment} */'); | |
| 43 } | |
| 44 | |
| 45 void visitCommentDefinition(CommentDefinition node) { | |
| 46 emit('<!-- ${node.comment} -->'); | |
| 47 } | |
| 48 | |
| 49 void visitMediaExpression(MediaExpression node) { | |
| 50 emit(node.andOperator ? ' AND ' : ' '); | |
| 51 emit('(${node.mediaFeature}:'); | |
| 52 visitExpressions(node.exprs); | |
| 53 emit(')'); | |
| 54 } | |
| 55 | |
| 56 void visitMediaQuery(MediaQuery query) { | |
| 57 var unary = query.hasUnary ? ' ${query.unary}' : ''; | |
| 58 var mediaType = query.hasMediaType ? ' ${query.mediaType}' : ''; | |
| 59 emit('$unary$mediaType'); | |
| 60 for (var expression in query.expressions) { | |
| 61 visitMediaExpression(expression); | |
| 62 } | |
| 63 } | |
| 64 | |
| 65 void emitMediaQueries(queries) { | |
| 66 var queriesLen = queries.length; | |
| 67 for (var i = 0; i < queriesLen; i++) { | |
| 68 var query = queries[i]; | |
| 69 if (query.hasMediaType && i > 0) emit(','); | |
| 70 visitMediaQuery(query); | |
| 71 } | |
| 72 } | |
| 73 | |
| 74 void visitMediaDirective(MediaDirective node) { | |
| 75 emit(' @media'); | |
| 76 emitMediaQueries(node.mediaQueries); | |
| 77 emit(' {'); | |
| 78 for (var ruleset in node.rulesets) { | |
| 79 ruleset.visit(this); | |
| 80 } | |
| 81 emit('$_newLine\}'); | |
| 82 } | |
| 83 | |
| 84 void visitHostDirective(HostDirective node) { | |
| 85 emit('\n@host {'); | |
| 86 for (var ruleset in node.rulesets) { | |
| 87 ruleset.visit(this); | |
| 88 } | |
| 89 emit('$_newLine\}'); | |
| 90 } | |
| 91 | |
| 92 /** | |
| 93 * @page : pseudoPage { | |
| 94 * decls | |
| 95 * } | |
| 96 */ | |
| 97 void visitPageDirective(PageDirective node) { | |
| 98 emit('$_newLine@page'); | |
| 99 if (node.hasIdent || node.hasPseudoPage) { | |
| 100 if (node.hasIdent) emit(' '); | |
| 101 emit(node._ident); | |
| 102 emit(node.hasPseudoPage ? ':${node._pseudoPage}' : ''); | |
| 103 } | |
| 104 emit(' '); | |
| 105 | |
| 106 var declsMargin = node._declsMargin; | |
| 107 var declsMarginLength = declsMargin.length; | |
| 108 for (var i = 0; i < declsMarginLength; i++) { | |
| 109 if (i > 0) emit(_newLine); | |
| 110 emit('{$_newLine'); | |
| 111 declsMargin[i].visit(this); | |
| 112 emit('}'); | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 /** @charset "charset encoding" */ | |
| 117 void visitCharsetDirective(CharsetDirective node) { | |
| 118 emit('$_newLine@charset "${node.charEncoding}";'); | |
| 119 } | |
| 120 | |
| 121 void visitImportDirective(ImportDirective node) { | |
| 122 bool isStartingQuote(String ch) => ('\'"'.indexOf(ch[0]) >= 0); | |
| 123 | |
| 124 if (_isTesting) { | |
| 125 // Emit assuming url() was parsed; most suite tests use url function. | |
| 126 emit(' @import url(${node.import})'); | |
| 127 } else if (isStartingQuote(node.import)) { | |
| 128 emit(' @import ${node.import}'); | |
| 129 } else { | |
| 130 // url(...) isn't needed only a URI can follow an @import directive; emit | |
| 131 // url as a string. | |
| 132 emit(' @import "${node.import}"'); | |
| 133 } | |
| 134 emitMediaQueries(node.mediaQueries); | |
| 135 emit(';'); | |
| 136 } | |
| 137 | |
| 138 void visitKeyFrameDirective(KeyFrameDirective node) { | |
| 139 emit('$_newLine${node.keyFrameName} '); | |
| 140 node.name.visit(this); | |
| 141 emit('$_sp{$_newLine'); | |
| 142 for (final block in node._blocks) { | |
| 143 block.visit(this); | |
| 144 } | |
| 145 emit('}'); | |
| 146 } | |
| 147 | |
| 148 void visitFontFaceDirective(FontFaceDirective node) { | |
| 149 emit('$_newLine@font-face '); | |
| 150 emit('$_sp{$_newLine'); | |
| 151 node._declarations.visit(this); | |
| 152 emit('}'); | |
| 153 } | |
| 154 | |
| 155 void visitKeyFrameBlock(KeyFrameBlock node) { | |
| 156 emit('$_sp$_sp'); | |
| 157 node._blockSelectors.visit(this); | |
| 158 emit('$_sp{$_newLine'); | |
| 159 node._declarations.visit(this); | |
| 160 emit('$_sp$_sp}$_newLine'); | |
| 161 } | |
| 162 | |
| 163 void visitStyletDirective(StyletDirective node) { | |
| 164 emit('/* @stylet export as ${node.dartClassName} */\n'); | |
| 165 } | |
| 166 | |
| 167 void visitNamespaceDirective(NamespaceDirective node) { | |
| 168 bool isStartingQuote(String ch) => ('\'"'.indexOf(ch) >= 0); | |
| 169 | |
| 170 if (isStartingQuote(node._uri)) { | |
| 171 emit(' @namespace ${node.prefix}"${node._uri}"'); | |
| 172 } else { | |
| 173 if (_isTesting) { | |
| 174 // Emit exactly was we parsed. | |
| 175 emit(' @namespace ${node.prefix}url(${node._uri})'); | |
| 176 } else { | |
| 177 // url(...) isn't needed only a URI can follow a: | |
| 178 // @namespace prefix directive. | |
| 179 emit(' @namespace ${node.prefix}${node._uri}'); | |
| 180 } | |
| 181 } | |
| 182 emit(';'); | |
| 183 } | |
| 184 | |
| 185 void visitVarDefinitionDirective(VarDefinitionDirective node) { | |
| 186 visitVarDefinition(node.def); | |
| 187 emit(';$_newLine'); | |
| 188 } | |
| 189 | |
| 190 void visitMixinRulesetDirective(MixinRulesetDirective node) { | |
| 191 emit('@mixin ${node.name} {'); | |
| 192 for (var ruleset in node.rulesets) { | |
| 193 ruleset.visit(this); | |
| 194 } | |
| 195 emit('}'); | |
| 196 } | |
| 197 | |
| 198 void visitMixinDeclarationDirective(MixinDeclarationDirective node) { | |
| 199 emit('@mixin ${node.name} {\n'); | |
| 200 visitDeclarationGroup(node.declarations); | |
| 201 emit('}'); | |
| 202 } | |
| 203 | |
| 204 /** | |
| 205 * Added optional newLine for handling @include at top-level vs/ inside of | |
| 206 * a declaration group. | |
| 207 */ | |
| 208 void visitIncludeDirective(IncludeDirective node, [bool topLevel = true]) { | |
| 209 if (topLevel) emit(_newLine); | |
| 210 emit('@include ${node.name}'); | |
| 211 emit(';'); | |
| 212 } | |
| 213 | |
| 214 void visitContentDirective(ContentDirective node) { | |
| 215 // TODO(terry): TBD | |
| 216 } | |
| 217 | |
| 218 void visitRuleSet(RuleSet node) { | |
| 219 emit("$_newLine"); | |
| 220 node._selectorGroup.visit(this); | |
| 221 emit(" {$_newLine"); | |
| 222 node._declarationGroup.visit(this); | |
| 223 emit("}"); | |
| 224 } | |
| 225 | |
| 226 void visitDeclarationGroup(DeclarationGroup node) { | |
| 227 var declarations = node.declarations; | |
| 228 var declarationsLength = declarations.length; | |
| 229 for (var i = 0; i < declarationsLength; i++) { | |
| 230 if (i > 0) emit(_newLine); | |
| 231 emit("$_sp$_sp"); | |
| 232 declarations[i].visit(this); | |
| 233 emit(";"); | |
| 234 } | |
| 235 if (declarationsLength > 0) emit(_newLine); | |
| 236 } | |
| 237 | |
| 238 void visitMarginGroup(MarginGroup node) { | |
| 239 var margin_sym_name = | |
| 240 TokenKind.idToValue(TokenKind.MARGIN_DIRECTIVES, node.margin_sym); | |
| 241 | |
| 242 emit("@$margin_sym_name {$_newLine"); | |
| 243 | |
| 244 visitDeclarationGroup(node); | |
| 245 | |
| 246 emit("}$_newLine"); | |
| 247 } | |
| 248 | |
| 249 void visitDeclaration(Declaration node) { | |
| 250 String importantAsString() => node.important ? '$_sp!important' : ''; | |
| 251 | |
| 252 emit("${node.property}: "); | |
| 253 node._expression.visit(this); | |
| 254 | |
| 255 emit("${importantAsString()}"); | |
| 256 } | |
| 257 | |
| 258 void visitVarDefinition(VarDefinition node) { | |
| 259 emit("var-${node.definedName}: "); | |
| 260 node._expression.visit(this); | |
| 261 } | |
| 262 | |
| 263 void visitIncludeMixinAtDeclaration(IncludeMixinAtDeclaration node) { | |
| 264 // Don't emit a new line we're inside of a declaration group. | |
| 265 visitIncludeDirective(node.include, false); | |
| 266 } | |
| 267 | |
| 268 void visitExtendDeclaration(ExtendDeclaration node) { | |
| 269 emit("@extend "); | |
| 270 for (var selector in node.selectors) { | |
| 271 selector.visit(this); | |
| 272 } | |
| 273 } | |
| 274 | |
| 275 void visitSelectorGroup(SelectorGroup node) { | |
| 276 var selectors = node.selectors; | |
| 277 var selectorsLength = selectors.length; | |
| 278 for (var i = 0; i < selectorsLength; i++) { | |
| 279 if (i > 0) emit(',$_sp'); | |
| 280 selectors[i].visit(this); | |
| 281 } | |
| 282 } | |
| 283 | |
| 284 void visitSimpleSelectorSequence(SimpleSelectorSequence node) { | |
| 285 emit('${node._combinatorToString}'); | |
| 286 node.simpleSelector.visit(this); | |
| 287 } | |
| 288 | |
| 289 void visitSimpleSelector(SimpleSelector node) { | |
| 290 emit(node.name); | |
| 291 } | |
| 292 | |
| 293 void visitNamespaceSelector(NamespaceSelector node) { | |
| 294 emit(node.toString()); | |
| 295 } | |
| 296 | |
| 297 void visitElementSelector(ElementSelector node) { | |
| 298 emit(node.toString()); | |
| 299 } | |
| 300 | |
| 301 void visitAttributeSelector(AttributeSelector node) { | |
| 302 emit(node.toString()); | |
| 303 } | |
| 304 | |
| 305 void visitIdSelector(IdSelector node) { | |
| 306 emit(node.toString()); | |
| 307 } | |
| 308 | |
| 309 void visitClassSelector(ClassSelector node) { | |
| 310 emit(node.toString()); | |
| 311 } | |
| 312 | |
| 313 void visitPseudoClassSelector(PseudoClassSelector node) { | |
| 314 emit(node.toString()); | |
| 315 } | |
| 316 | |
| 317 void visitPseudoElementSelector(PseudoElementSelector node) { | |
| 318 emit(node.toString()); | |
| 319 } | |
| 320 | |
| 321 void visitPseudoClassFunctionSelector(PseudoClassFunctionSelector node) { | |
| 322 emit(":${node.name}("); | |
| 323 node.expression.visit(this); | |
| 324 emit(')'); | |
| 325 } | |
| 326 | |
| 327 void visitPseudoElementFunctionSelector(PseudoElementFunctionSelector node) { | |
| 328 emit("::${node.name}("); | |
| 329 node.expression.visit(this); | |
| 330 emit(')'); | |
| 331 } | |
| 332 | |
| 333 void visitNegationSelector(NegationSelector node) { | |
| 334 emit(':not('); | |
| 335 node.negationArg.visit(this); | |
| 336 emit(')'); | |
| 337 } | |
| 338 | |
| 339 void visitSelectorExpression(SelectorExpression node) { | |
| 340 var expressions = node.expressions; | |
| 341 var expressionsLength = expressions.length; | |
| 342 for (var i = 0; i < expressionsLength; i++) { | |
| 343 // Add space seperator between terms without an operator. | |
| 344 var expression = expressions[i]; | |
| 345 expression.visit(this); | |
| 346 } | |
| 347 } | |
| 348 | |
| 349 void visitUnicodeRangeTerm(UnicodeRangeTerm node) { | |
| 350 if (node.hasSecond) { | |
| 351 emit("U+${node.first}-${node.second}"); | |
| 352 } else { | |
| 353 emit("U+${node.first}"); | |
| 354 } | |
| 355 } | |
| 356 | |
| 357 void visitLiteralTerm(LiteralTerm node) { | |
| 358 emit(node.text); | |
| 359 } | |
| 360 | |
| 361 void visitHexColorTerm(HexColorTerm node) { | |
| 362 var mappedName; | |
| 363 if (_isTesting && (node.value is! BAD_HEX_VALUE)) { | |
| 364 mappedName = TokenKind.hexToColorName(node.value); | |
| 365 } | |
| 366 if (mappedName == null) { | |
| 367 mappedName = '#${node.text}'; | |
| 368 } | |
| 369 | |
| 370 emit(mappedName); | |
| 371 } | |
| 372 | |
| 373 void visitNumberTerm(NumberTerm node) { | |
| 374 visitLiteralTerm(node); | |
| 375 } | |
| 376 | |
| 377 void visitUnitTerm(UnitTerm node) { | |
| 378 emit(node.toString()); | |
| 379 } | |
| 380 | |
| 381 void visitLengthTerm(LengthTerm node) { | |
| 382 emit(node.toString()); | |
| 383 } | |
| 384 | |
| 385 void visitPercentageTerm(PercentageTerm node) { | |
| 386 emit('${node.text}%'); | |
| 387 } | |
| 388 | |
| 389 void visitEmTerm(EmTerm node) { | |
| 390 emit('${node.text}em'); | |
| 391 } | |
| 392 | |
| 393 void visitExTerm(ExTerm node) { | |
| 394 emit('${node.text}ex'); | |
| 395 } | |
| 396 | |
| 397 void visitAngleTerm(AngleTerm node) { | |
| 398 emit(node.toString()); | |
| 399 } | |
| 400 | |
| 401 void visitTimeTerm(TimeTerm node) { | |
| 402 emit(node.toString()); | |
| 403 } | |
| 404 | |
| 405 void visitFreqTerm(FreqTerm node) { | |
| 406 emit(node.toString()); | |
| 407 } | |
| 408 | |
| 409 void visitFractionTerm(FractionTerm node) { | |
| 410 emit('${node.text}fr'); | |
| 411 } | |
| 412 | |
| 413 void visitUriTerm(UriTerm node) { | |
| 414 emit('url("${node.text}")'); | |
| 415 } | |
| 416 | |
| 417 void visitResolutionTerm(ResolutionTerm node) { | |
| 418 emit(node.toString()); | |
| 419 } | |
| 420 | |
| 421 void visitViewportTerm(ViewportTerm node) { | |
| 422 emit(node.toString()); | |
| 423 } | |
| 424 | |
| 425 void visitFunctionTerm(FunctionTerm node) { | |
| 426 // TODO(terry): Optimize rgb to a hexcolor. | |
| 427 emit('${node.text}('); | |
| 428 node._params.visit(this); | |
| 429 emit(')'); | |
| 430 } | |
| 431 | |
| 432 void visitGroupTerm(GroupTerm node) { | |
| 433 emit('('); | |
| 434 var terms = node._terms; | |
| 435 var termsLength = terms.length; | |
| 436 for (var i = 0; i < termsLength; i++) { | |
| 437 if (i > 0) emit('$_sp'); | |
| 438 terms[i].visit(this); | |
| 439 } | |
| 440 emit(')'); | |
| 441 } | |
| 442 | |
| 443 void visitItemTerm(ItemTerm node) { | |
| 444 emit('[${node.text}]'); | |
| 445 } | |
| 446 | |
| 447 void visitIE8Term(IE8Term node) { | |
| 448 visitLiteralTerm(node); | |
| 449 } | |
| 450 | |
| 451 void visitOperatorSlash(OperatorSlash node) { | |
| 452 emit('/'); | |
| 453 } | |
| 454 | |
| 455 void visitOperatorComma(OperatorComma node) { | |
| 456 emit(','); | |
| 457 } | |
| 458 | |
| 459 void visitOperatorPlus(OperatorPlus node) { | |
| 460 emit('+'); | |
| 461 } | |
| 462 | |
| 463 void visitOperatorMinus(OperatorMinus node) { | |
| 464 emit('-'); | |
| 465 } | |
| 466 | |
| 467 void visitVarUsage(VarUsage node) { | |
| 468 emit('var(${node.name}'); | |
| 469 if (!node.defaultValues.isEmpty) { | |
| 470 emit(','); | |
| 471 for (var defaultValue in node.defaultValues) { | |
| 472 emit(' '); | |
| 473 defaultValue.visit(this); | |
| 474 } | |
| 475 } | |
| 476 emit(')'); | |
| 477 } | |
| 478 | |
| 479 void visitExpressions(Expressions node) { | |
| 480 var expressions = node.expressions; | |
| 481 var expressionsLength = expressions.length; | |
| 482 for (var i = 0; i < expressionsLength; i++) { | |
| 483 // Add space seperator between terms without an operator. | |
| 484 // TODO(terry): Should have a BinaryExpression to solve this problem. | |
| 485 var expression = expressions[i]; | |
| 486 if (i > 0 && | |
| 487 !(expression is OperatorComma || expression is OperatorSlash)) { | |
| 488 emit(' '); | |
| 489 } | |
| 490 expression.visit(this); | |
| 491 } | |
| 492 } | |
| 493 | |
| 494 void visitBinaryExpression(BinaryExpression node) { | |
| 495 // TODO(terry): TBD | |
| 496 throw UnimplementedError; | |
| 497 } | |
| 498 | |
| 499 void visitUnaryExpression(UnaryExpression node) { | |
| 500 // TODO(terry): TBD | |
| 501 throw UnimplementedError; | |
| 502 } | |
| 503 | |
| 504 void visitIdentifier(Identifier node) { | |
| 505 emit(node.name); | |
| 506 } | |
| 507 | |
| 508 void visitWildcard(Wildcard node) { | |
| 509 emit('*'); | |
| 510 } | |
| 511 | |
| 512 void visitDartStyleExpression(DartStyleExpression node) { | |
| 513 // TODO(terry): TBD | |
| 514 throw UnimplementedError; | |
| 515 } | |
| 516 } | |
| OLD | NEW |
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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