From: Volker Rümelin <vr_qemu@t-online.de>
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>
---
include/ui/win32-kbd-hook.h | 14 +++++
stubs/win32-kbd-hook.c | 18 +++++++
ui/win32-kbd-hook.c | 102 ++++++++++++++++++++++++++++++++++++
stubs/Makefile.objs | 1 +
ui/Makefile.objs | 3 ++
5 files changed, 138 insertions(+)
create mode 100644 include/ui/win32-kbd-hook.h
create mode 100644 stubs/win32-kbd-hook.c
create mode 100644 ui/win32-kbd-hook.c
diff --git a/include/ui/win32-kbd-hook.h b/include/ui/win32-kbd-hook.h
new file mode 100644
index 000000000000..4bd9f00f973f
--- /dev/null
+++ b/include/ui/win32-kbd-hook.h
@@ -0,0 +1,14 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef UI_WIN32_KBD_HOOK_H
+#define UI_WIN32_KBD_HOOK_H
+
+void win32_kbd_set_window(void *hwnd);
+void win32_kbd_set_grab(bool grab);
+
+#endif
diff --git a/stubs/win32-kbd-hook.c b/stubs/win32-kbd-hook.c
new file mode 100644
index 000000000000..1a084b081ab6
--- /dev/null
+++ b/stubs/win32-kbd-hook.c
@@ -0,0 +1,18 @@
+/*
+ * Win32 keyboard hook stubs
+ *
+ * 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.
+ */
+
+#include "qemu/osdep.h"
+#include "ui/win32-kbd-hook.h"
+
+void win32_kbd_set_window(void *hwnd)
+{
+}
+
+void win32_kbd_set_grab(bool grab)
+{
+}
diff --git a/ui/win32-kbd-hook.c b/ui/win32-kbd-hook.c
new file mode 100644
index 000000000000..1ac237db9e9d
--- /dev/null
+++ b/ui/win32-kbd-hook.c
@@ -0,0 +1,102 @@
+/*
+ * 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;
+}
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index 45be5dc0ed78..6a9e3135e8f9 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -32,6 +32,7 @@ stub-obj-y += trace-control.o
stub-obj-y += uuid.o
stub-obj-y += vm-stop.o
stub-obj-y += vmstate.o
+stub-obj-y += win32-kbd-hook.o
stub-obj-y += fd-register.o
stub-obj-y += qmp_memory_device.o
stub-obj-y += target-monitor-defs.o
diff --git a/ui/Makefile.objs b/ui/Makefile.objs
index e6da6ff047fd..504b19647977 100644
--- a/ui/Makefile.objs
+++ b/ui/Makefile.objs
@@ -15,6 +15,9 @@ common-obj-$(CONFIG_SPICE) += spice-core.o spice-input.o spice-display.o
common-obj-$(CONFIG_COCOA) += cocoa.o
common-obj-$(CONFIG_VNC) += $(vnc-obj-y)
common-obj-$(call lnot,$(CONFIG_VNC)) += vnc-stubs.o
+ifneq (,$(findstring m,$(CONFIG_SDL)$(CONFIG_GTK)))
+common-obj-$(CONFIG_WIN32) += win32-kbd-hook.o
+endif
# ui-sdl module
common-obj-$(CONFIG_SDL) += sdl.mo
--
2.18.4
On 5/20/20 10:43 AM, Gerd Hoffmann wrote: > From: Volker Rümelin <vr_qemu@t-online.de> > > 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 This patch content doesn't match exactly the content of the message-id. There are some build-sys changes. > Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> > --- > include/ui/win32-kbd-hook.h | 14 +++++ > stubs/win32-kbd-hook.c | 18 +++++++ > ui/win32-kbd-hook.c | 102 ++++++++++++++++++++++++++++++++++++ > stubs/Makefile.objs | 1 + > ui/Makefile.objs | 3 ++ > 5 files changed, 138 insertions(+) > create mode 100644 include/ui/win32-kbd-hook.h > create mode 100644 stubs/win32-kbd-hook.c > create mode 100644 ui/win32-kbd-hook.c [...] > diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs > index 45be5dc0ed78..6a9e3135e8f9 100644 > --- a/stubs/Makefile.objs > +++ b/stubs/Makefile.objs > @@ -32,6 +32,7 @@ stub-obj-y += trace-control.o > stub-obj-y += uuid.o > stub-obj-y += vm-stop.o > stub-obj-y += vmstate.o > +stub-obj-y += win32-kbd-hook.o > stub-obj-y += fd-register.o > stub-obj-y += qmp_memory_device.o > stub-obj-y += target-monitor-defs.o > diff --git a/ui/Makefile.objs b/ui/Makefile.objs > index e6da6ff047fd..504b19647977 100644 > --- a/ui/Makefile.objs > +++ b/ui/Makefile.objs > @@ -15,6 +15,9 @@ common-obj-$(CONFIG_SPICE) += spice-core.o spice-input.o spice-display.o > common-obj-$(CONFIG_COCOA) += cocoa.o > common-obj-$(CONFIG_VNC) += $(vnc-obj-y) > common-obj-$(call lnot,$(CONFIG_VNC)) += vnc-stubs.o > +ifneq (,$(findstring m,$(CONFIG_SDL)$(CONFIG_GTK))) If we limit this object compilation, shouldn't we also limit the stub? > +common-obj-$(CONFIG_WIN32) += win32-kbd-hook.o > +endif > > # ui-sdl module > common-obj-$(CONFIG_SDL) += sdl.mo >
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