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2df9f5718d
Import win32 keyboard hooking code from project spice-gtk. This patch removes the extra left control key up/down input events inserted by Windows for the right alt key up/down input events with international keyboard layouts. Additionally there's some code to grab the keyboard. The next patches will use this code. Only Windows needs this. Signed-off-by: Volker Rümelin <vr_qemu@t-online.de> Message-id: 20200516072014.7766-1-vr_qemu@t-online.de Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* (at your option) any later version. See the COPYING file in the
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* top-level directory.
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*
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* The win32 keyboard hooking code was imported from project spice-gtk.
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*/
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#include "qemu/osdep.h"
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#include "sysemu/sysemu.h"
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#include "ui/win32-kbd-hook.h"
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static Notifier win32_unhook_notifier;
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static HHOOK win32_keyboard_hook;
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static HWND win32_window;
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static DWORD win32_grab;
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static LRESULT CALLBACK keyboard_hook_cb(int code, WPARAM wparam, LPARAM lparam)
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{
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if (win32_window && code == HC_ACTION && win32_window == GetFocus()) {
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KBDLLHOOKSTRUCT *hooked = (KBDLLHOOKSTRUCT *)lparam;
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if (wparam != WM_KEYUP) {
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DWORD dwmsg = (hooked->flags << 24) |
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((hooked->scanCode & 0xff) << 16) | 1;
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switch (hooked->vkCode) {
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case VK_CAPITAL:
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/* fall through */
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case VK_SCROLL:
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/* fall through */
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case VK_NUMLOCK:
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/* fall through */
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case VK_LSHIFT:
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/* fall through */
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case VK_RSHIFT:
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/* fall through */
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case VK_RCONTROL:
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/* fall through */
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case VK_LMENU:
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/* fall through */
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case VK_RMENU:
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break;
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case VK_LCONTROL:
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/*
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* When pressing AltGr, an extra VK_LCONTROL with a special
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* scancode with bit 9 set is sent. Let's ignore the extra
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* VK_LCONTROL, as that will make AltGr misbehave.
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*/
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if (hooked->scanCode & 0x200) {
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return 1;
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}
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break;
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default:
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if (win32_grab) {
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SendMessage(win32_window, wparam, hooked->vkCode, dwmsg);
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return 1;
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}
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break;
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}
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} else {
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switch (hooked->vkCode) {
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case VK_LCONTROL:
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if (hooked->scanCode & 0x200) {
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return 1;
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}
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break;
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}
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}
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}
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return CallNextHookEx(NULL, code, wparam, lparam);
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}
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static void keyboard_hook_unhook(Notifier *n, void *data)
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{
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UnhookWindowsHookEx(win32_keyboard_hook);
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win32_keyboard_hook = NULL;
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}
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void win32_kbd_set_window(void *hwnd)
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{
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if (hwnd && !win32_keyboard_hook) {
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/* note: the installing thread must have a message loop */
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win32_keyboard_hook = SetWindowsHookEx(WH_KEYBOARD_LL, keyboard_hook_cb,
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GetModuleHandle(NULL), 0);
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if (win32_keyboard_hook) {
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win32_unhook_notifier.notify = keyboard_hook_unhook;
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qemu_add_exit_notifier(&win32_unhook_notifier);
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}
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}
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win32_window = hwnd;
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}
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void win32_kbd_set_grab(bool grab)
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{
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win32_grab = grab;
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}
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