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// 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.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]
[System.Runtime.InteropServices.ComVisible(true)]
public enum UIPermissionWindow
{
// No window use allowed at all.
NoWindows = 0x0,
// Only allow safe subwindow use (for embedded components).
SafeSubWindows = 0x01,
// Safe top-level window use only (see specification for details).
SafeTopLevelWindows = 0x02,
// All windows and all event may be used.
AllWindows = 0x03,
}
[Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public enum UIPermissionClipboard
{
// No clipboard access is allowed.
NoClipboard = 0x0,
// Paste from the same app domain only.
OwnClipboard = 0x1,
// Any clipboard access is allowed.
AllClipboard = 0x2,
}
[System.Runtime.InteropServices.ComVisible(true)]
[Serializable]
sealed public class UIPermission
: CodeAccessPermission, IUnrestrictedPermission, IBuiltInPermission
{
//------------------------------------------------------
//
// PRIVATE STATE DATA
//
//------------------------------------------------------
private UIPermissionWindow m_windowFlag;
private UIPermissionClipboard m_clipboardFlag;
//------------------------------------------------------
//
// PUBLIC CONSTRUCTORS
//
//------------------------------------------------------
public UIPermission(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 UIPermission(UIPermissionWindow windowFlag, UIPermissionClipboard clipboardFlag )
{
VerifyWindowFlag( windowFlag );
VerifyClipboardFlag( clipboardFlag );
m_windowFlag = windowFlag;
m_clipboardFlag = clipboardFlag;
}
public UIPermission(UIPermissionWindow windowFlag )
{
VerifyWindowFlag( windowFlag );
m_windowFlag = windowFlag;
}
public UIPermission(UIPermissionClipboard clipboardFlag )
{
VerifyClipboardFlag( clipboardFlag );
m_clipboardFlag = clipboardFlag;
}
//------------------------------------------------------
//
// PUBLIC ACCESSOR METHODS
//
//------------------------------------------------------
public UIPermissionWindow Window
{
set
{
VerifyWindowFlag(value);
m_windowFlag = value;
}
get
{
return m_windowFlag;
}
}
public UIPermissionClipboard Clipboard
{
set
{
VerifyClipboardFlag(value);
m_clipboardFlag = value;
}
get
{
return m_clipboardFlag;
}
}
//------------------------------------------------------
//
// PRIVATE AND PROTECTED HELPERS FOR ACCESSORS AND CONSTRUCTORS
//
//------------------------------------------------------
private static void VerifyWindowFlag(UIPermissionWindow flag)
{
if (flag < UIPermissionWindow.NoWindows || flag > UIPermissionWindow.AllWindows)
{
throw new ArgumentException(Environment.GetResourceString("Arg_EnumIllegalVal", (int)flag));
}
Contract.EndContractBlock();
}
private static void VerifyClipboardFlag(UIPermissionClipboard flag)
{
if (flag < UIPermissionClipboard.NoClipboard || flag > UIPermissionClipboard.AllClipboard)
{
throw new ArgumentException(Environment.GetResourceString("Arg_EnumIllegalVal", (int)flag));
}
Contract.EndContractBlock();
}
private void Reset()
{
m_windowFlag = UIPermissionWindow.NoWindows;
m_clipboardFlag = UIPermissionClipboard.NoClipboard;
}
private void SetUnrestricted( bool unrestricted )
{
if (unrestricted)
{
m_windowFlag = UIPermissionWindow.AllWindows;
m_clipboardFlag = UIPermissionClipboard.AllClipboard;
}
}
#if false
//------------------------------------------------------
//
// OBJECT METHOD OVERRIDES
//
//------------------------------------------------------
public String ToString()
{
#if _DEBUG
StringBuilder sb = new StringBuilder();
sb.Append("UIPermission(");
if (IsUnrestricted())
{
sb.Append("Unrestricted");
}
else
{
sb.Append(m_stateNameTableWindow[m_windowFlag]);
sb.Append(", ");
sb.Append(m_stateNameTableClipboard[m_clipboardFlag]);
}
sb.Append(")");
return sb.ToString();
#else
return super.ToString();
#endif
}
#endif
//------------------------------------------------------
//
// CODEACCESSPERMISSION IMPLEMENTATION
//
//------------------------------------------------------
public bool IsUnrestricted()
{
return m_windowFlag == UIPermissionWindow.AllWindows && m_clipboardFlag == UIPermissionClipboard.AllClipboard;
}
//------------------------------------------------------
//
// IPERMISSION IMPLEMENTATION
//
//------------------------------------------------------
public override bool IsSubsetOf(IPermission target)
{
if (target == null)
{
// Only safe subset if this is empty
return m_windowFlag == UIPermissionWindow.NoWindows && m_clipboardFlag == UIPermissionClipboard.NoClipboard;
}
try
{
UIPermission operand = (UIPermission)target;
if (operand.IsUnrestricted())
return true;
else if (this.IsUnrestricted())
return false;
else
return this.m_windowFlag <= operand.m_windowFlag && this.m_clipboardFlag <= operand.m_clipboardFlag;
}
catch (InvalidCastException)
{
throw new
ArgumentException(
Environment.GetResourceString("Argument_WrongType", this.GetType().FullName)
);
}
}
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)
);
}
UIPermission operand = (UIPermission)target;
UIPermissionWindow isectWindowFlags = m_windowFlag < operand.m_windowFlag ? m_windowFlag : operand.m_windowFlag;
UIPermissionClipboard isectClipboardFlags = m_clipboardFlag < operand.m_clipboardFlag ? m_clipboardFlag : operand.m_clipboardFlag;
if (isectWindowFlags == UIPermissionWindow.NoWindows && isectClipboardFlags == UIPermissionClipboard.NoClipboard)
return null;
else
return new UIPermission(isectWindowFlags, isectClipboardFlags);
}
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)
);
}
UIPermission operand = (UIPermission)target;
UIPermissionWindow isectWindowFlags = m_windowFlag > operand.m_windowFlag ? m_windowFlag : operand.m_windowFlag;
UIPermissionClipboard isectClipboardFlags = m_clipboardFlag > operand.m_clipboardFlag ? m_clipboardFlag : operand.m_clipboardFlag;
if (isectWindowFlags == UIPermissionWindow.NoWindows && isectClipboardFlags == UIPermissionClipboard.NoClipboard)
return null;
else
return new UIPermission(isectWindowFlags, isectClipboardFlags);
}
public override IPermission Copy()
{
return new UIPermission(this.m_windowFlag, this.m_clipboardFlag);
}
/// <internalonly/>
int IBuiltInPermission.GetTokenIndex()
{
return UIPermission.GetTokenIndex();
}
internal static int GetTokenIndex()
{
return BuiltInPermissionIndex.UIPermissionIndex;
}
}
}
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