Support for parsing all CSS and producing one CSS file

lib/src/info.dart

 // Copyright (c) 2012, 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.
 
 /**
  * Datatypes holding information extracted by the analyzer and used by later
  * phases of the compiler.
  */
 library info;
 
@@ skipping 180 matching lines @@
 
   /**
    * The inverse of [externalCode]. If this .dart file was imported via a script
    * tag, this refers to the HTML file that imported it.
    */
   LibraryInfo htmlFile;
 
   /** File where the top-level code was defined. */
   Path get inputPath;
 
-  /** Stylesheet with <style>...</style> */
-  StringBuffer cssSource = new StringBuffer();
-
   /** Parsed cssSource. */
-  StyleSheet styleSheet;
+  List<StyleSheet> styleSheets = [];
 
   /**
    * Name of the file that will hold any generated Dart code for this library
    * unit.
    */
   String _getOutputFilename(NameMangler mangle);
 
   /** This is used in transforming Dart code to track modified files. */
   bool modified = false;
 
@@ skipping 53 matching lines @@
    * All custom element definitions defined in this file or imported via
    *`<link rel='components'>` tag. Maps from the tag name to the component
    * information. This map is sorted by the tag name.
    */
   final Map<String, ComponentInfo> components =
       new SplayTreeMap<String, ComponentInfo>();
 
   /** Files imported with `<link rel="component">` */
   final List<Path> componentLinks = <Path>[];
 
+  /** Files imported with `<link rel="stylesheet">` */
+  final List<Path> styleSheetHref = <Path>[];
+
   /** Root is associated with the body info. */
   ElementInfo bodyInfo;
 
   FileInfo(this.path, [this.isEntryPoint = false]);
 
   /**
    * Query for an ElementInfo matching the provided [tag], starting from the
    * [bodyInfo].
    */
   ElementInfo query(String tag) => new _QueryInfo(tag).visit(bodyInfo);
@@ skipping 474 matching lines @@
   }
 
   visitChildren(ElementInfo info) {
     for (var child in info.children) {
       var result = visit(child);
       if (result != null) return result;
     }
     return null;
   }
 }