Beginning of CSS parser using frog parsering infrastructure.

frog/css/csstemplate.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('css.dart');
+
+class CssTemplate {
+  // TODO(terry): Add obfuscation mapping file.
+  static void xlate(String cssExpression, CssWorld world) {

[jimhug, 2011/11/09 16:04:03]

Speaking for Bob <smile>.  Any reason not to just make these top-level
functions?

[terry, 2011/11/09 21:56:06]

Good point Bob (Jim?) I'll do that.
Done.

+    Parser parser = new Parser(new SourceFile(SourceFile.IN_MEMORY_FILE,
+        cssExpression));
+    try {
+      var tree = parser.template(true);
+      if (tree != null) {
+        parser.validateTemplate(tree.selectors, world);
+      }
+    } catch (var cssException) {
+      print(cssException.toString());
+      throw cssException;
+    }
+  }
+
+  // Returns pretty printed tree of the expression.
+  static String xlateDebug(String cssExpression, CssWorld world) {
+    Parser parser = new Parser(new SourceFile(SourceFile.IN_MEMORY_FILE,
+        cssExpression));
+    String output = "";
+    String prettyTree = "";
+    try {
+      var tree = parser.template(true);
+      if (tree != null) {
+        prettyTree = tree.toDebugString();
+        parser.validateTemplate(tree.selectors, world);
+        output = prettyTree;
+      }
+    } catch (var cssException) {
+      String error = cssException.toString();
+      output = "$error\n$prettyTree";
+      throw cssException;
+    }
+
+    return output;
+  }
+
+}