-
Notifications
You must be signed in to change notification settings - Fork 1
/
WindowsClipboard.cs
206 lines (166 loc) · 4.61 KB
/
WindowsClipboard.cs
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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
static class WindowsClipboard
{
public static async Task SetTextAsync(string text, CancellationToken cancellation)
{
await TryOpenClipboardAsync(cancellation);
InnerSet(text);
}
public static void SetText(string text)
{
TryOpenClipboard();
InnerSet(text);
}
static void InnerSet(string text)
{
EmptyClipboard();
IntPtr hGlobal = default;
try
{
var bytes = (text.Length + 1) * 2;
hGlobal = Marshal.AllocHGlobal(bytes);
if (hGlobal == default)
{
ThrowWin32();
}
var target = GlobalLock(hGlobal);
if (target == default)
{
ThrowWin32();
}
try
{
Marshal.Copy(text.ToCharArray(), 0, target, text.Length);
}
finally
{
GlobalUnlock(target);
}
if (SetClipboardData(cfUnicodeText, hGlobal) == default)
{
ThrowWin32();
}
hGlobal = default;
}
finally
{
if (hGlobal != default)
{
Marshal.FreeHGlobal(hGlobal);
}
CloseClipboard();
}
}
static async Task TryOpenClipboardAsync(CancellationToken cancellation)
{
var num = 10;
while (true)
{
if (OpenClipboard(default))
{
break;
}
if (--num == 0)
{
ThrowWin32();
}
await Task.Delay(100, cancellation);
}
}
static void TryOpenClipboard()
{
var num = 10;
while (true)
{
if (OpenClipboard(default))
{
break;
}
if (--num == 0)
{
ThrowWin32();
}
Thread.Sleep(100);
}
}
public static async Task<string?> GetTextAsync(CancellationToken cancellation)
{
if (!IsClipboardFormatAvailable(cfUnicodeText))
{
return null;
}
await TryOpenClipboardAsync(cancellation);
return InnerGet();
}
public static string? GetText()
{
if (!IsClipboardFormatAvailable(cfUnicodeText))
{
return null;
}
TryOpenClipboard();
return InnerGet();
}
static string? InnerGet()
{
IntPtr handle = default;
IntPtr pointer = default;
try
{
handle = GetClipboardData(cfUnicodeText);
if (handle == default)
{
return null;
}
pointer = GlobalLock(handle);
if (pointer == default)
{
return null;
}
var size = GlobalSize(handle);
var buff = new byte[size];
Marshal.Copy(pointer, buff, 0, size);
return Encoding.Unicode.GetString(buff).TrimEnd('\0');
}
finally
{
if (pointer != default)
{
GlobalUnlock(handle);
}
CloseClipboard();
}
}
const uint cfUnicodeText = 13;
static void ThrowWin32()
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
[DllImport("User32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool IsClipboardFormatAvailable(uint format);
[DllImport("User32.dll", SetLastError = true)]
static extern IntPtr GetClipboardData(uint uFormat);
[DllImport("kernel32.dll", SetLastError = true)]
static extern IntPtr GlobalLock(IntPtr hMem);
[DllImport("kernel32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool GlobalUnlock(IntPtr hMem);
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool OpenClipboard(IntPtr hWndNewOwner);
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool CloseClipboard();
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr SetClipboardData(uint uFormat, IntPtr data);
[DllImport("user32.dll")]
static extern bool EmptyClipboard();
[DllImport("Kernel32.dll", SetLastError = true)]
static extern int GlobalSize(IntPtr hMem);
}