2 // System.ComponentModel.Design.Serialization.ContextStack.cs
5 // Alejandro Sánchez Acosta (raciel@gnome.org)
6 // Andreas Nahr (ClassDevelopment@A-SoftTech.com)
7 // Ivan N. Zlatev (contact@i-nz.net)
9 // (C) Alejandro Sánchez Acosta
10 // (C) 2003 Andreas Nahr
11 // (C) 2007 Ivan N. Zlatev
15 // Permission is hereby granted, free of charge, to any person obtaining
16 // a copy of this software and associated documentation files (the
17 // "Software"), to deal in the Software without restriction, including
18 // without limitation the rights to use, copy, modify, merge, publish,
19 // distribute, sublicense, and/or sell copies of the Software, and to
20 // permit persons to whom the Software is furnished to do so, subject to
21 // the following conditions:
23 // The above copyright notice and this permission notice shall be
24 // included in all copies or substantial portions of the Software.
26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
36 using System
.Collections
;
38 namespace System
.ComponentModel
.Design
.Serialization
40 public sealed class ContextStack
42 private ArrayList _contextList
;
44 public ContextStack ()
46 _contextList
= new ArrayList ();
49 public object Current
{
51 int context_count
= _contextList
.Count
;
52 if (context_count
> 0)
53 return _contextList
[context_count
- 1];
58 public object this[Type type
] {
61 throw new ArgumentNullException ("type");
62 for (int i
= _contextList
.Count
- 1; i
>= 0; i
--) {
63 object context
= _contextList
[i
];
64 if (type
.IsInstanceOfType (context
))
71 public object this[int level
] {
74 throw new ArgumentOutOfRangeException ("level");
75 int context_count
= _contextList
.Count
;
76 if (context_count
> 0 && context_count
> level
)
77 return _contextList
[context_count
- 1 - level
];
85 int context_count
= _contextList
.Count
;
86 if (context_count
> 0) {
87 int lastItem
= context_count
- 1;
88 o
= _contextList
[lastItem
];
89 _contextList
.RemoveAt (lastItem
);
94 public void Push (object context
)
97 throw new ArgumentNullException ("context");
98 _contextList
.Add (context
);
102 public void Append (object context
)
105 throw new ArgumentNullException ("context");
106 _contextList
.Insert (0, context
);