Merge remote-tracking branch 'remotes/alistair23/tags/pull-riscv-to-apply-20210921...
[qemu.git] / ui / win32-kbd-hook.c
1 /*
2 * This work is licensed under the terms of the GNU GPL, version 2 or
3 * (at your option) any later version. See the COPYING file in the
4 * top-level directory.
5 *
6 * The win32 keyboard hooking code was imported from project spice-gtk.
7 */
8
9 #include "qemu/osdep.h"
10 #include "sysemu/sysemu.h"
11 #include "ui/win32-kbd-hook.h"
12
13 static Notifier win32_unhook_notifier;
14 static HHOOK win32_keyboard_hook;
15 static HWND win32_window;
16 static DWORD win32_grab;
17
18 static LRESULT CALLBACK keyboard_hook_cb(int code, WPARAM wparam, LPARAM lparam)
19 {
20 if (win32_window && code == HC_ACTION && win32_window == GetFocus()) {
21 KBDLLHOOKSTRUCT *hooked = (KBDLLHOOKSTRUCT *)lparam;
22
23 if (wparam != WM_KEYUP) {
24 DWORD dwmsg = (hooked->flags << 24) |
25 ((hooked->scanCode & 0xff) << 16) | 1;
26
27 switch (hooked->vkCode) {
28 case VK_CAPITAL:
29 /* fall through */
30 case VK_SCROLL:
31 /* fall through */
32 case VK_NUMLOCK:
33 /* fall through */
34 case VK_LSHIFT:
35 /* fall through */
36 case VK_RSHIFT:
37 /* fall through */
38 case VK_RCONTROL:
39 /* fall through */
40 case VK_LMENU:
41 /* fall through */
42 case VK_RMENU:
43 break;
44
45 case VK_LCONTROL:
46 /*
47 * When pressing AltGr, an extra VK_LCONTROL with a special
48 * scancode with bit 9 set is sent. Let's ignore the extra
49 * VK_LCONTROL, as that will make AltGr misbehave.
50 */
51 if (hooked->scanCode & 0x200) {
52 return 1;
53 }
54 break;
55
56 default:
57 if (win32_grab) {
58 SendMessage(win32_window, wparam, hooked->vkCode, dwmsg);
59 return 1;
60 }
61 break;
62 }
63
64 } else {
65 switch (hooked->vkCode) {
66 case VK_LCONTROL:
67 if (hooked->scanCode & 0x200) {
68 return 1;
69 }
70 break;
71 }
72 }
73 }
74
75 return CallNextHookEx(NULL, code, wparam, lparam);
76 }
77
78 static void keyboard_hook_unhook(Notifier *n, void *data)
79 {
80 UnhookWindowsHookEx(win32_keyboard_hook);
81 win32_keyboard_hook = NULL;
82 }
83
84 void win32_kbd_set_window(void *hwnd)
85 {
86 if (hwnd && !win32_keyboard_hook) {
87 /* note: the installing thread must have a message loop */
88 win32_keyboard_hook = SetWindowsHookEx(WH_KEYBOARD_LL, keyboard_hook_cb,
89 GetModuleHandle(NULL), 0);
90 if (win32_keyboard_hook) {
91 win32_unhook_notifier.notify = keyboard_hook_unhook;
92 qemu_add_exit_notifier(&win32_unhook_notifier);
93 }
94 }
95
96 win32_window = hwnd;
97 }
98
99 void win32_kbd_set_grab(bool grab)
100 {
101 win32_grab = grab;
102 }