1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
//
// System.Security.Permissions.FileDialogPermission.cs
//
// Author
// Sebastien Pouliot <sebastien@ximian.com>
//
// Copyright (C) 2003 Motus Technologies. http://www.motus.com
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
namespace System.Security.Permissions {
[Serializable]
public sealed class FileDialogPermission : CodeAccessPermission, IUnrestrictedPermission, IBuiltInPermission {
private const int version = 1;
private FileDialogPermissionAccess _access;
// Constructors
public FileDialogPermission (PermissionState state)
{
if (CheckPermissionState (state, true) == PermissionState.Unrestricted)
_access = FileDialogPermissionAccess.OpenSave;
else
_access = FileDialogPermissionAccess.None;
}
public FileDialogPermission (FileDialogPermissionAccess access)
{
// reuse validation by the Flags property
Access = access;
}
// Properties
public FileDialogPermissionAccess Access {
get { return _access; }
set {
if (!Enum.IsDefined (typeof (FileDialogPermissionAccess), value)) {
string msg = String.Format (Locale.GetText ("Invalid enum {0}"), value);
throw new ArgumentException (msg, "FileDialogPermissionAccess");
}
_access = value;
}
}
// Methods
public override IPermission Copy ()
{
return new FileDialogPermission (_access);
}
public override void FromXml (SecurityElement esd)
{
// General validation in CodeAccessPermission
CheckSecurityElement (esd, "esd", version, version);
// Note: we do not (yet) care about the return value
// as we only accept version 1 (min/max values)
if (IsUnrestricted (esd)) {
_access = FileDialogPermissionAccess.OpenSave;
}
else {
string a = esd.Attribute ("Access");
if (a == null)
_access = FileDialogPermissionAccess.None;
else {
_access = (FileDialogPermissionAccess) Enum.Parse (
typeof (FileDialogPermissionAccess), a);
}
}
}
public override IPermission Intersect (IPermission target)
{
FileDialogPermission fdp = Cast (target);
if (fdp == null)
return null;
FileDialogPermissionAccess a = (_access & fdp._access);
return ((a == FileDialogPermissionAccess.None) ? null : new FileDialogPermission (a));
}
public override bool IsSubsetOf (IPermission target)
{
FileDialogPermission fdp = Cast (target);
if (fdp == null)
return false;
return ((_access & fdp._access) == _access);
}
public bool IsUnrestricted ()
{
return (_access == FileDialogPermissionAccess.OpenSave);
}
#if !NET_2_0
// Same results as base class - so why is it overrided ?
public override string ToString ()
{
return base.ToString ();
}
#endif
public override SecurityElement ToXml ()
{
SecurityElement se = Element (1);
switch (_access) {
case FileDialogPermissionAccess.Open:
se.AddAttribute ("Access", "Open");
break;
case FileDialogPermissionAccess.Save:
se.AddAttribute ("Access", "Save");
break;
case FileDialogPermissionAccess.OpenSave:
se.AddAttribute ("Unrestricted", "true");
break;
}
return se;
}
public override IPermission Union (IPermission target)
{
FileDialogPermission fdp = Cast (target);
if (fdp == null)
return Copy ();
if (IsUnrestricted () || fdp.IsUnrestricted ())
return new FileDialogPermission (PermissionState.Unrestricted);
return new FileDialogPermission (_access | fdp._access);
}
// IBuiltInPermission
int IBuiltInPermission.GetTokenIndex ()
{
return (int) BuiltInToken.FileDialog;
}
// helpers
private FileDialogPermission Cast (IPermission target)
{
if (target == null)
return null;
FileDialogPermission fdp = (target as FileDialogPermission);
if (fdp == null) {
ThrowInvalidPermission (target, typeof (FileDialogPermission));
}
return fdp;
}
}
}
|
