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143 lines (139 loc) · 3.92 KB
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using System;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
using System.Text;
using ProcessNET.Native.Types;
namespace ProcessNET.Windows
{
[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
public struct Message
{
#if DEBUG
static TraceSwitch AllWinMessages = new TraceSwitch("AllWinMessages", "Output every received message");
#endif
IntPtr hWnd;
int msg;
IntPtr wparam;
IntPtr lparam;
IntPtr result;
public IntPtr HWnd
{
get { return hWnd; }
set { hWnd = value; }
}
public int Msg
{
get { return msg; }
set { msg = value; }
}
public IntPtr WParam
{
get { return wparam; }
set { wparam = value; }
}
public IntPtr LParam
{
get { return lparam; }
set { lparam = value; }
}
public IntPtr Result
{
get { return result; }
set { result = value; }
}
public object GetLParam(Type cls)
{
return Marshal.PtrToStructure(lparam, cls);
}
public static Message Create(IntPtr hWnd, WindowsMessages msg, IntPtr wparam, IntPtr lparam)
{
return Create(hWnd, (int)msg, wparam, lparam);
}
public static Message Create(IntPtr hWnd, int msg, IntPtr wparam, IntPtr lparam)
{
var m = new Message
{
hWnd = hWnd,
msg = msg,
wparam = wparam,
lparam = lparam,
result = IntPtr.Zero
};
#if DEBUG
if (AllWinMessages.TraceVerbose)
{
Debug.WriteLine(m.ToString());
}
#endif
return m;
}
public override bool Equals(object o)
{
if (!(o is Message))
{
return false;
}
var m = (Message)o;
return hWnd == m.hWnd &&
msg == m.msg &&
wparam == m.wparam &&
lparam == m.lparam &&
result == m.result;
}
public static bool operator !=(Message a, Message b)
{
return !a.Equals(b);
}
public static bool operator ==(Message a, Message b)
{
return a.Equals(b);
}
public override int GetHashCode()
{
return (int)hWnd << 4 | msg;
}
private static readonly CodeAccessPermission UnmanagedCode =
new SecurityPermission(SecurityPermissionFlag.UnmanagedCode);
public override string ToString()
{
// ASSURT : 151574. Link Demand on System.Windows.Forms.Message
// fails to protect overriden methods.
bool unrestricted = false;
try
{
UnmanagedCode.Demand();
unrestricted = true;
}
catch (SecurityException)
{
// eat the exception.
}
if (unrestricted)
{
return GetProperName(((WindowsMessages)Msg).ToString());
}
return base.ToString();
}
private static string GetProperName(string name)
{
var sb = new StringBuilder();
for (var i = 0; i < name.Length; i++)
{
var c = name[i];
if (i > 0 && char.IsUpper(c))
{
sb.Append(' ');
sb.Append(char.ToLowerInvariant(c));
}
else
{
sb.Append(c);
}
}
return sb.ToString();
}
}
}