New CSS parser written in Dart to replace pyparser

utils/css/test.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-//#import('../file_system.dart');
-
-#import("dart:dom");
-#import('css.dart');
-#import('../../frog/lang.dart', prefix:'lang');
-
-
-void runCss([bool debug = false, bool parseOnly = false]) {
-  final HTMLTextAreaElement classes = document.getElementById('classes');
-  final HTMLTextAreaElement expression = document.getElementById('expression');
-  final HTMLDivElement result = document.getElementById('result');
-
-  List<String> knownWorld = classes.value.split("\n");
-  List<String> knownClasses = [];
-  List<String> knownIds = [];
-  for (name in knownWorld) {
-    if (name.startsWith('.')) {
-      knownClasses.add(name.substring(1));
-    } else if (name.startsWith('#')) {
-      knownIds.add(name.substring(1));
-    }
-  }
-
-  CssWorld cssWorld = new CssWorld(knownClasses, knownIds);
-  bool templateValid = true;
-  String dumpTree = "";
-
-  String cssExpr = expression.value;
-  if (!debug) {
-    try {
-      cssParseAndValidate(cssExpr, cssWorld);
-    } catch (var cssException) {
-      templateValid = false;
-      dumpTree = cssException.toString();
-    }
-  } else if (parseOnly) {
-    try {
-      Parser parser = new Parser(new lang.SourceFile(
-          lang.SourceFile.IN_MEMORY_FILE, cssExpr));
-      List<SelectorGroup> groups = parser.preprocess();
-      StringBuffer groupTree = new StringBuffer();
-      for (group in groups) {
-        String prettySelector = group.toString();
-        groupTree.add("${prettySelector}\n");
-        groupTree.add("-----\n");
-        groupTree.add(group.toDebugString());
-      }
-      dumpTree = groupTree.toString();
-    } catch (var cssParseException) {
-      templateValid = false;
-      dumpTree = cssParseException.toString();
-    }
-  } else {
-    try {
-      dumpTree = cssParseAndValidateDebug(cssExpr, cssWorld);
-    } catch (var cssException) {
-      templateValid = false;
-      dumpTree = cssException.toString();
-    }
-  }
-
-  final var bgcolor = templateValid ? "white" : "red";
-  final var color = templateValid ? "black" : "white";
-  final var valid = templateValid ? "VALID" : "NOT VALID";
-  String resultStyle = 'margin: 0; height: 138px; width: 100%; border: 0; border-top: 1px solid black;';
-  result.innerHTML = '''
-    <div style="font-weight: bold; background-color: $bgcolor; color: $color;">
-      Expression: $cssExpr is $valid
-    </div>
-    <textarea style="$resultStyle">$dumpTree</textarea>
-  ''';
-}
-
-void main() {
-  var element = document.createElement('div');
-  element.innerHTML = '''
-    <div style="position: absolute; top: 10px; width: 200px;" align=center>
-      <span style="font-weight:bold;">Classes</span><br/>
-      <textarea id="classes" style="width: 200px; height: 310px;">.foobar\n.xyzzy\n.test\n.dummy\n#myId\n#myStory</textarea>
-    </div>
-    <div style="left: 225px; position: absolute; top: 10px;">
-      <span style="font-weight:bold;">Selector Expression</span><br/>
-      <textarea id="expression" style="width: 400px; height: 100px;"></textarea>
-      <br/>
-    </div>
-    <button onclick="runCss(true, true)" style="position: absolute; left: 430px; top: 135px;">Parse</button>
-    <button onclick="runCss()" style="position: absolute; left: 500px; top: 135px;">Check</button>
-    <button onclick="runCss(true)" style="position: absolute; left: 570px; top: 135px;">Debug</button>
-    <div style="top: 160px; left: 225px; position: absolute;">
-      <span style="font-weight:bold;">Result</span><br/>
-      <div id="result" style="width: 400px; height: 158px; border: black solid 1px;"></textarea>
-    </div>
-  ''';
-
-  document.body.appendChild(element);
-
-  // TODO(terry): Needed so runCss isn't shakened out.
-  if (false) {
-    runCss();
-  }
-
-  initCssWorld();
-}