Display function signatures instead of just "Function".

client/lib/item.dart

 // Copyright (c) 2013, 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.
 
 library category_item;
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:dartdoc_viewer/data.dart';
@@ skipping 823 matching lines @@
     if (!isInherited || owner == null) return location;
     return owner.location..subMemberName = name;
   }
 
   // Helper to determine if this method is actually an unnamed constructor.
   bool get isUnnamedConstructor => isConstructor && name == '';
 
   String toString() => decoratedName;
 }
 
+/** The signature for a function that is passed in as a parameter to a method.*/
+class Closure extends Parameterized {
+  List<Parameter> parameters;
+  final NestedType returnType;
+  final String name;
+
+  Closure(String name, Map yaml, [Item owner]) :
+    name = name,
+    returnType = new NestedType(yaml['return'].first),
+    super('closure', null) {
+    parameters = getParameters(yaml['parameters']);
+    _owner = owner;
+  }
+
+  // For a method parameter we use the special anchor @method,parameter
+  // because the parameter name may not be unique on the page
+  DocsLocation get anchorHrefLocation {
+   if (owner == null) return null;
+
+   var ownerLocation = owner.anchorHrefLocation;
+   var ownerAnchor = ownerLocation.anchor;
+   ownerLocation.anchor = ownerAnchor == null ?
+       hashDecoratedName : "$ownerAnchor$hashDecoratedName";
+   return ownerLocation;
+  }
+
+  String get anchorHref => anchorHrefLocation.withAnchor;
+
+  String get hashDecoratedName => "$PARAMETER_SEPARATOR$name";
+}
+
 /**
  * A single parameter to a [Method].
  */
 class Parameter extends Item {
 
   final bool isOptional;
   final bool isNamed;
   final bool hasDefault;
   final NestedType type;
   final String defaultValue;
   final AnnotationGroup annotations;
+  final Closure functionDeclaration;
 
   Parameter(String name, Map yaml, [Item owner])
       : isOptional = _boolFor('optional', yaml),
         isNamed = _boolFor('named', yaml),
         hasDefault = _boolFor('default', yaml),
         type = new NestedType(yaml['type'].first),
         defaultValue = yaml['value'],
         annotations = new AnnotationGroup(yaml['annotations']),
+        functionDeclaration = yaml['functionDeclaration'] == null? null
+            : new Closure(name, yaml['functionDeclaration'], owner),
         super(name, null) {
     _owner = owner;
   }
 
   String get decoratedName => '$name$decoration';
 
   String get decoration {
     if (hasDefault) {
       return isNamed ? ': $defaultValue' : '=$defaultValue';
     }
@@ skipping 155 matching lines @@
 }
 
 
 bool _boolFor(String key, Map input) {
   var value = input[key];
   if (value == true || value == 'true') return true;
   if (value == null || value == false || value == 'false') return false;
   throw new FormatException("Invalid format, expected boolean key: $key"
       " value: $value");
 }