blob: 98a7d54c689c2db6e3cd41163b78c9079a4f5f07 (
plain)
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
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
namespace System.Security.Permissions {
using System;
using System.Text;
using System.Security;
using System.Security.Util;
using System.IO;
using System.Runtime.Serialization;
using System.Reflection;
using System.Collections;
using System.Globalization;
using System.Diagnostics.Contracts;
[Serializable]
[Flags]
[System.Runtime.InteropServices.ComVisible(true)]
public enum FileDialogPermissionAccess {
None = 0x00,
Open = 0x01,
Save = 0x02,
OpenSave = Open | Save
}
[Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class FileDialogPermission : CodeAccessPermission, IUnrestrictedPermission, IBuiltInPermission {
FileDialogPermissionAccess access;
public FileDialogPermission(PermissionState state) {
if (state == PermissionState.Unrestricted) {
SetUnrestricted(true);
}
else if (state == PermissionState.None) {
SetUnrestricted(false);
Reset();
}
else {
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPermissionState"));
}
}
public FileDialogPermission(FileDialogPermissionAccess access) {
VerifyAccess(access);
this.access = access;
}
public FileDialogPermissionAccess Access {
get {
return access;
}
set {
VerifyAccess(value);
access = value;
}
}
public override IPermission Copy() {
return new FileDialogPermission(this.access);
}
/// <internalonly/>
int IBuiltInPermission.GetTokenIndex() {
return FileDialogPermission.GetTokenIndex();
}
internal static int GetTokenIndex() {
return BuiltInPermissionIndex.FileDialogPermissionIndex;
}
public override IPermission Intersect(IPermission target) {
if (target == null) {
return null;
}
else if (!VerifyType(target)) {
throw new ArgumentException(Environment.GetResourceString("Argument_WrongType", this.GetType().FullName));
}
FileDialogPermission operand = (FileDialogPermission)target;
FileDialogPermissionAccess intersectAccess = access & operand.Access;
if (intersectAccess == FileDialogPermissionAccess.None)
return null;
else
return new FileDialogPermission(intersectAccess);
}
public override bool IsSubsetOf(IPermission target) {
if (target == null) {
// Only safe subset if this is empty
return access == FileDialogPermissionAccess.None;
}
try {
FileDialogPermission operand = (FileDialogPermission)target;
if (operand.IsUnrestricted()) {
return true;
}
else if (this.IsUnrestricted()) {
return false;
}
else {
int open = (int)(access & FileDialogPermissionAccess.Open);
int save = (int)(access & FileDialogPermissionAccess.Save);
int openTarget = (int)(operand.Access & FileDialogPermissionAccess.Open);
int saveTarget = (int)(operand.Access & FileDialogPermissionAccess.Save);
return open <= openTarget && save <= saveTarget;
}
}
catch (InvalidCastException) {
throw new ArgumentException(Environment.GetResourceString("Argument_WrongType", this.GetType().FullName));
}
}
public bool IsUnrestricted() {
return access == FileDialogPermissionAccess.OpenSave;
}
void Reset() {
access = FileDialogPermissionAccess.None;
}
void SetUnrestricted( bool unrestricted ) {
if (unrestricted) {
access = FileDialogPermissionAccess.OpenSave;
}
}
public override IPermission Union(IPermission target) {
if (target == null) {
return this.Copy();
}
else if (!VerifyType(target)) {
throw new ArgumentException(Environment.GetResourceString("Argument_WrongType", this.GetType().FullName));
}
FileDialogPermission operand = (FileDialogPermission)target;
return new FileDialogPermission(access | operand.Access);
}
static void VerifyAccess(FileDialogPermissionAccess access) {
if ((access & ~FileDialogPermissionAccess.OpenSave) != 0 ) {
throw new ArgumentException(Environment.GetResourceString("Arg_EnumIllegalVal", (int)access));
}
Contract.EndContractBlock();
}
}
}
|
