jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
ui/win32-kbd-hook: handle AltGr in a hook procedure
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>
authored by
Volker Rümelin
and committed by
Gerd Hoffmann
2df9f571
debe78ce
+138
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include/ui/win32-kbd-hook.h
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include/ui/win32-kbd-hook.h
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/*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef UI_WIN32_KBD_HOOK_H
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#define UI_WIN32_KBD_HOOK_H
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void win32_kbd_set_window(void *hwnd);
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void win32_kbd_set_grab(bool grab);
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#endif
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stubs/Makefile.objs
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stubs/Makefile.objs
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stubs/win32-kbd-hook.c
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stubs/win32-kbd-hook.c
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/*
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* Win32 keyboard hook stubs
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*
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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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#include "qemu/osdep.h"
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#include "ui/win32-kbd-hook.h"
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void win32_kbd_set_window(void *hwnd)
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{
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}
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void win32_kbd_set_grab(bool grab)
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{
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}
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ui/Makefile.objs
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ui/Makefile.objs
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common-obj-$(CONFIG_COCOA) += cocoa.o
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common-obj-$(CONFIG_VNC) += $(vnc-obj-y)
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common-obj-$(call lnot,$(CONFIG_VNC)) += vnc-stubs.o
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ifneq (,$(findstring m,$(CONFIG_SDL)$(CONFIG_GTK)))
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common-obj-$(CONFIG_WIN32) += win32-kbd-hook.o
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endif
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# ui-sdl module
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common-obj-$(CONFIG_SDL) += sdl.mo
+102
ui/win32-kbd-hook.c
+102
ui/win32-kbd-hook.c
···
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/*
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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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}