[mirror_qemu.git] / ui / win32-kbd-hook.c

/*
 * This work is licensed under the terms of the GNU GPL, version 2 or
 * (at your option) any later version.  See the COPYING file in the
 * top-level directory.
 *
 * The win32 keyboard hooking code was imported from project spice-gtk.
 */

#include "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "ui/win32-kbd-hook.h"

static Notifier win32_unhook_notifier;
static HHOOK win32_keyboard_hook;
static HWND win32_window;
static DWORD win32_grab;

static LRESULT CALLBACK keyboard_hook_cb(int code, WPARAM wparam, LPARAM lparam)
{
    if  (win32_window && code == HC_ACTION && win32_window == GetFocus()) {
        KBDLLHOOKSTRUCT *hooked = (KBDLLHOOKSTRUCT *)lparam;

        if (wparam != WM_KEYUP) {
            DWORD dwmsg = (hooked->flags << 24) |
                          ((hooked->scanCode & 0xff) << 16) | 1;

            switch (hooked->vkCode) {
            case VK_CAPITAL:
                /* fall through */
            case VK_SCROLL:
                /* fall through */
            case VK_NUMLOCK:
                /* fall through */
            case VK_LSHIFT:
                /* fall through */
            case VK_RSHIFT:
                /* fall through */
            case VK_RCONTROL:
                /* fall through */
            case VK_LMENU:
                /* fall through */
            case VK_RMENU:
                break;

            case VK_LCONTROL:
                /*
                 * When pressing AltGr, an extra VK_LCONTROL with a special
                 * scancode with bit 9 set is sent. Let's ignore the extra
                 * VK_LCONTROL, as that will make AltGr misbehave.
                 */
                if (hooked->scanCode & 0x200) {
                    return 1;
                }
                break;

            default:
                if (win32_grab) {
                    SendMessage(win32_window, wparam, hooked->vkCode, dwmsg);
                    return 1;
                }
                break;
            }

        } else {
            switch (hooked->vkCode) {
            case VK_LCONTROL:
                if (hooked->scanCode & 0x200) {
                    return 1;
                }
                break;
            }
        }
    }

    return CallNextHookEx(NULL, code, wparam, lparam);
}

static void keyboard_hook_unhook(Notifier *n, void *data)
{
    UnhookWindowsHookEx(win32_keyboard_hook);
    win32_keyboard_hook = NULL;
}

void win32_kbd_set_window(void *hwnd)
{
    if (hwnd && !win32_keyboard_hook) {
        /* note: the installing thread must have a message loop */
        win32_keyboard_hook = SetWindowsHookEx(WH_KEYBOARD_LL, keyboard_hook_cb,
                                               GetModuleHandle(NULL), 0);
        if (win32_keyboard_hook) {
            win32_unhook_notifier.notify = keyboard_hook_unhook;
            qemu_add_exit_notifier(&win32_unhook_notifier);
        }
    }

    win32_window = hwnd;
}

void win32_kbd_set_grab(bool grab)
{
    win32_grab = grab;
}
Commit	Line	Data
2df9f571 VR	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	}