1 //
2 // Copyright (C) 2010 Novell Inc. http://novell.com
3 //
4 // Permission is hereby granted, free of charge, to any person obtaining
5 // a copy of this software and associated documentation files (the
6 // "Software"), to deal in the Software without restriction, including
7 // without limitation the rights to use, copy, modify, merge, publish,
8 // distribute, sublicense, and/or sell copies of the Software, and to
9 // permit persons to whom the Software is furnished to do so, subject to
10 // the following conditions:
11 //
12 // The above copyright notice and this permission notice shall be
13 // included in all copies or substantial portions of the Software.
14 //
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 //
23 using System;
24 using System.Collections;
25 using System.Collections.Generic;
26 using System.ComponentModel;
27 using System.Reflection;
28 using System.Windows.Markup;
29 using System.Xaml.Schema;
30 
31 namespace System.Windows.Markup
32 {
33 	[MarkupExtensionReturnType (typeof (Array))]
34 	[ContentProperty ("Items")]
35 	[System.Runtime.CompilerServices.TypeForwardedFrom (Consts.AssemblyPresentationFramework_3_5)]
36 	public class ArrayExtension : MarkupExtension
37 	{
ArrayExtension()38 		public ArrayExtension ()
39 		{
40 			items = new ArrayList ();
41 		}
42 
ArrayExtension(Array elements)43 		public ArrayExtension (Array elements)
44 		{
45 			if (elements == null)
46 				throw new ArgumentNullException ("elements");
47 			Type = elements.GetType ().GetElementType ();
48 			items = new ArrayList (elements);
49 		}
50 
ArrayExtension(Type arrayType)51 		public ArrayExtension (Type arrayType)
52 		{
53 			if (arrayType == null)
54 				throw new ArgumentNullException ("arrayType");
55 			Type = arrayType;
56 			items = new ArrayList ();
57 		}
58 
59 		[ConstructorArgument ("arrayType")]
60 		public Type Type { get; set; }
61 
62 		IList items;
63 		[DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
64 		public IList Items {
65 			get { return items; }
66 		}
67 
AddChild(Object value)68 		public void AddChild (Object value)
69 		{
70 			// null is allowed.
71 			Items.Add (value);
72 		}
73 
AddText(string text)74 		public void AddText (string text)
75 		{
76 			// null is allowed.
77 			Items.Add (text);
78 		}
79 
ProvideValue(IServiceProvider serviceProvider)80 		public override object ProvideValue (IServiceProvider serviceProvider)
81 		{
82 			if (Type == null)
83 				throw new InvalidOperationException ("Type property must be set before calling ProvideValue method");
84 
85 			bool invalid = false;
86 			foreach (var item in Items) {
87 				if (item == null) {
88 					if (Type.IsValueType)
89 						invalid = true;
90 				}
91 				else if (!Type.IsAssignableFrom (item.GetType ()))
92 					invalid = true;
93 				if (invalid)
94 					throw new InvalidOperationException (String.Format ("Item in the array must be an instance of '{0}'", Type));
95 			}
96 			Array a = Array.CreateInstance (Type, Items.Count);
97 			Items.CopyTo (a, 0);
98 			return a;
99 		}
100 	}
101 }
102