Merge remote-tracking branch 'remotes/kraxel/tags/ui-20200520-pull-request' into staging

ui: windows keyboard fixes for gtk & sdl.
ui: require GTK 3.22 or newer.

# gpg: Signature made Wed 20 May 2020 09:41:48 BST
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/ui-20200520-pull-request:
  ui: increase min required GTK version to 3.22.0
  ui/gtk: use native keyboard scancodes on Windows
  ui/gtk: don't pass on win keys without keyboard grab
  ui/sdl2-input: use trace-events to debug key events
  ui/sdl2: start in full screen with grab enabled
  ui/sdl2: fix handling of AltGr key on Windows
  ui/gtk: remove unused variable ignore_keys
  ui/gtk: remove unused code
  ui/gkt: release all keys on grab-broken-event
  ui/gtk: fix handling of AltGr key on Windows
  ui/win32-kbd-hook: handle AltGr in a hook procedure

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

10 files changed, 264 insertions, 109 deletions

diff --git a/configure b/configure
index 26084fc53a..2fc05c4465 100755
--- a/configure
+++ b/configure
@@ -2897,7 +2897,7 @@ fi
 if test "$gtk" != "no"; then
     gtkpackage="gtk+-3.0"
     gtkx11package="gtk+-x11-3.0"
-    gtkversion="3.14.0"
+    gtkversion="3.22.0"
     if $pkg_config --exists "$gtkpackage >= $gtkversion"; then
         gtk_cflags=$($pkg_config --cflags $gtkpackage)
         gtk_libs=$($pkg_config --libs $gtkpackage)
diff --git a/include/ui/win32-kbd-hook.h b/include/ui/win32-kbd-hook.h
new file mode 100644
index 0000000000..4bd9f00f97
--- /dev/null
+++ b/include/ui/win32-kbd-hook.h
@@ -0,0 +1,14 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef UI_WIN32_KBD_HOOK_H
+#define UI_WIN32_KBD_HOOK_H
+
+void win32_kbd_set_window(void *hwnd);
+void win32_kbd_set_grab(bool grab);
+
+#endif
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index 45be5dc0ed..6a9e3135e8 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -32,6 +32,7 @@ stub-obj-y += trace-control.o
 stub-obj-y += uuid.o
 stub-obj-y += vm-stop.o
 stub-obj-y += vmstate.o
+stub-obj-y += win32-kbd-hook.o
 stub-obj-y += fd-register.o
 stub-obj-y += qmp_memory_device.o
 stub-obj-y += target-monitor-defs.o
diff --git a/stubs/win32-kbd-hook.c b/stubs/win32-kbd-hook.c
new file mode 100644
index 0000000000..1a084b081a
--- /dev/null
+++ b/stubs/win32-kbd-hook.c
@@ -0,0 +1,18 @@
+/*
+ * Win32 keyboard hook stubs
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version.  See the COPYING file in the
+ * top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "ui/win32-kbd-hook.h"
+
+void win32_kbd_set_window(void *hwnd)
+{
+}
+
+void win32_kbd_set_grab(bool grab)
+{
+}
diff --git a/ui/Makefile.objs b/ui/Makefile.objs
index e6da6ff047..504b196479 100644
--- a/ui/Makefile.objs
+++ b/ui/Makefile.objs
@@ -15,6 +15,9 @@ common-obj-$(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
diff --git a/ui/gtk.c b/ui/gtk.c
index 83f2f5d49b..d4b49bd7da 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -38,6 +38,10 @@
 
 #include "ui/console.h"
 #include "ui/gtk.h"
+#ifdef G_OS_WIN32
+#include <gdk/gdkwin32.h>
+#endif
+#include "ui/win32-kbd-hook.h"
 
 #include <glib/gi18n.h>
 #include <locale.h>
@@ -108,15 +112,6 @@
 # define VTE_CHECK_VERSION(a, b, c) 0
 #endif
 
-/* Some older mingw versions lack this constant or have
- * it conditionally defined */
-#ifdef _WIN32
-# ifndef MAPVK_VK_TO_VSC
-#  define MAPVK_VK_TO_VSC 0
-# endif
-#endif
-
-
 #define HOTKEY_MODIFIERS        (GDK_CONTROL_MASK | GDK_MOD1_MASK)
 
 static const guint16 *keycode_map;
@@ -173,8 +168,6 @@ struct GtkDisplayState {
 
     bool external_pause_update;
 
-    bool ignore_keys;
-
     DisplayOptions *opts;
 };
 
@@ -428,6 +421,16 @@ static void gd_widget_reparent(GtkWidget *from, GtkWidget *to,
     g_object_unref(G_OBJECT(widget));
 }
 
+static void *gd_win32_get_hwnd(VirtualConsole *vc)
+{
+#ifdef G_OS_WIN32
+    return gdk_win32_window_get_impl_hwnd(
+        gtk_widget_get_window(vc->window ? vc->window : vc->s->window));
+#else
+    return NULL;
+#endif
+}
+
 /** DisplayState Callbacks **/
 
 static void gd_update(DisplayChangeListener *dcl,
@@ -487,12 +490,7 @@ static void gd_refresh(DisplayChangeListener *dcl)
 
 static GdkDevice *gd_get_pointer(GdkDisplay *dpy)
 {
-#if GTK_CHECK_VERSION(3, 20, 0)
     return gdk_seat_get_pointer(gdk_display_get_default_seat(dpy));
-#else
-    return gdk_device_manager_get_client_pointer(
-        gdk_display_get_device_manager(dpy));
-#endif
 }
 
 static void gd_mouse_set(DisplayChangeListener *dcl,
@@ -874,27 +872,18 @@ static gboolean gd_motion_event(GtkWidget *widget, GdkEventMotion *motion,
 
     if (!qemu_input_is_absolute() && s->ptr_owner == vc) {
         GdkScreen *screen = gtk_widget_get_screen(vc->gfx.drawing_area);
+        GdkDisplay *dpy = gtk_widget_get_display(widget);
+        GdkWindow *win = gtk_widget_get_window(widget);
+        GdkMonitor *monitor = gdk_display_get_monitor_at_window(dpy, win);
+        GdkRectangle geometry;
         int screen_width, screen_height;
 
         int x = (int)motion->x_root;
         int y = (int)motion->y_root;
 
-#if GTK_CHECK_VERSION(3, 22, 0)
-        {
-            GdkDisplay *dpy = gtk_widget_get_display(widget);
-            GdkWindow *win = gtk_widget_get_window(widget);
-            GdkMonitor *monitor = gdk_display_get_monitor_at_window(dpy, win);
-            GdkRectangle geometry;
-            gdk_monitor_get_geometry(monitor, &geometry);
-            screen_width = geometry.width;
-            screen_height = geometry.height;
-        }
-#else
-        {
-            screen_width = gdk_screen_get_width(screen);
-            screen_height = gdk_screen_get_height(screen);
-        }
-#endif
+        gdk_monitor_get_geometry(monitor, &geometry);
+        screen_width = geometry.width;
+        screen_height = geometry.height;
 
         /* In relative mode check to see if client pointer hit
          * one of the screen edges, and if so move it back by
@@ -1023,8 +1012,8 @@ static const guint16 *gd_get_keymap(size_t *maplen)
 #ifdef GDK_WINDOWING_WIN32
     if (GDK_IS_WIN32_DISPLAY(dpy)) {
         trace_gd_keymap_windowing("win32");
-        *maplen = qemu_input_map_win32_to_qcode_len;
-        return qemu_input_map_win32_to_qcode;
+        *maplen = qemu_input_map_atset1_to_qcode_len;
+        return qemu_input_map_atset1_to_qcode;
     }
 #endif
 
@@ -1070,6 +1059,25 @@ static int gd_map_keycode(int scancode)
     return keycode_map[scancode];
 }
 
+static int gd_get_keycode(GdkEventKey *key)
+{
+#ifdef G_OS_WIN32
+    int scancode = gdk_event_get_scancode((GdkEvent *)key);
+
+    /* translate Windows native scancodes to atset1 keycodes */
+    switch (scancode & (KF_EXTENDED | 0xff)) {
+    case 0x145:     /* NUMLOCK */
+        return scancode & 0xff;
+    }
+
+    return scancode & KF_EXTENDED ?
+        0xe000 | (scancode & 0xff) : scancode & 0xff;
+
+#else
+    return key->hardware_keycode;
+#endif
+}
+
 static gboolean gd_text_key_down(GtkWidget *widget,
                                  GdkEventKey *key, void *opaque)
 {
@@ -1081,7 +1089,7 @@ static gboolean gd_text_key_down(GtkWidget *widget,
     } else if (key->length) {
         kbd_put_string_console(con, key->string, key->length);
     } else {
-        int qcode = gd_map_keycode(key->hardware_keycode);
+        int qcode = gd_map_keycode(gd_get_keycode(key));
         kbd_put_qcode_console(con, qcode, false);
     }
     return TRUE;
@@ -1090,18 +1098,19 @@ static gboolean gd_text_key_down(GtkWidget *widget,
 static gboolean gd_key_event(GtkWidget *widget, GdkEventKey *key, void *opaque)
 {
     VirtualConsole *vc = opaque;
-    GtkDisplayState *s = vc->s;
-    int qcode;
-
-    if (s->ignore_keys) {
-        s->ignore_keys = (key->type == GDK_KEY_PRESS);
-        return TRUE;
-    }
+    int keycode, qcode;
 
-#ifdef WIN32
+#ifdef G_OS_WIN32
     /* on windows, we ought to ignore the reserved key event? */
     if (key->hardware_keycode == 0xff)
         return false;
+
+    if (!vc->s->kbd_owner) {
+        if (key->hardware_keycode == VK_LWIN ||
+            key->hardware_keycode == VK_RWIN) {
+            return FALSE;
+        }
+    }
 #endif
 
     if (key->keyval == GDK_KEY_Pause
@@ -1117,9 +1126,10 @@ static gboolean gd_key_event(GtkWidget *widget, GdkEventKey *key, void *opaque)
         return TRUE;
     }
 
-    qcode = gd_map_keycode(key->hardware_keycode);
+    keycode = gd_get_keycode(key);
+    qcode = gd_map_keycode(keycode);
 
-    trace_gd_key_event(vc->label, key->hardware_keycode, qcode,
+    trace_gd_key_event(vc->label, keycode, qcode,
                        (key->type == GDK_KEY_PRESS) ? "down" : "up");
 
     qkbd_state_key_event(vc->gfx.kbd, qcode,
@@ -1128,6 +1138,25 @@ static gboolean gd_key_event(GtkWidget *widget, GdkEventKey *key, void *opaque)
     return TRUE;
 }
 
+static gboolean gd_grab_broken_event(GtkWidget *widget,
+                                     GdkEventGrabBroken *event, void *opaque)
+{
+#ifdef CONFIG_WIN32
+    /*
+     * On Windows the Ctrl-Alt-Del key combination can't be grabbed. This
+     * key combination leaves all three keys in a stuck condition. We use
+     * the grab-broken-event to release all keys.
+     */
+    if (event->keyboard) {
+        VirtualConsole *vc = opaque;
+        GtkDisplayState *s = vc->s;
+
+        gtk_release_modifiers(s);
+    }
+#endif
+    return TRUE;
+}
+
 static gboolean gd_event(GtkWidget *widget, GdkEvent *event, void *opaque)
 {
     if (event->type == GDK_MOTION_NOTIFY) {
@@ -1180,7 +1209,6 @@ static void gd_menu_switch_vc(GtkMenuItem *item, void *opaque)
         gtk_notebook_set_current_page(nb, page);
         gtk_widget_grab_focus(vc->focus);
     }
-    s->ignore_keys = false;
 }
 
 static void gd_accel_switch_vc(void *opaque)
@@ -1390,7 +1418,6 @@ static void gd_menu_zoom_fit(GtkMenuItem *item, void *opaque)
     gd_update_full_redraw(vc);
 }
 
-#if GTK_CHECK_VERSION(3, 20, 0)
 static void gd_grab_update(VirtualConsole *vc, bool kbd, bool ptr)
 {
     GdkDisplay *display = gtk_widget_get_display(vc->gfx.drawing_area);
@@ -1414,32 +1441,6 @@ static void gd_grab_update(VirtualConsole *vc, bool kbd, bool ptr)
         gdk_seat_ungrab(seat);
     }
 }
-#else
-static void gd_grab_devices(VirtualConsole *vc, bool grab,
-                            GdkInputSource source, GdkEventMask mask,
-                            GdkCursor *cursor)
-{
-    GdkDisplay *display = gtk_widget_get_display(vc->gfx.drawing_area);
-    GdkDeviceManager *mgr = gdk_display_get_device_manager(display);
-    GList *devs = gdk_device_manager_list_devices(mgr, GDK_DEVICE_TYPE_MASTER);
-    GList *tmp = devs;
-
-    for (tmp = devs; tmp; tmp = tmp->next) {
-        GdkDevice *dev = tmp->data;
-        if (gdk_device_get_source(dev) != source) {
-            continue;
-        }
-        if (grab) {
-            GdkWindow *win = gtk_widget_get_window(vc->gfx.drawing_area);
-            gdk_device_grab(dev, win, GDK_OWNERSHIP_NONE, FALSE,
-                            mask, cursor, GDK_CURRENT_TIME);
-        } else {
-            gdk_device_ungrab(dev, GDK_CURRENT_TIME);
-        }
-    }
-    g_list_free(devs);
-}
-#endif
 
 static void gd_grab_keyboard(VirtualConsole *vc, const char *reason)
 {
@@ -1451,13 +1452,8 @@ static void gd_grab_keyboard(VirtualConsole *vc, const char *reason)
         }
     }
 
-#if GTK_CHECK_VERSION(3, 20, 0)
+    win32_kbd_set_grab(true);
     gd_grab_update(vc, true, vc->s->ptr_owner == vc);
-#else
-    gd_grab_devices(vc, true, GDK_SOURCE_KEYBOARD,
-                   GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
-                   NULL);
-#endif
     vc->s->kbd_owner = vc;
     gd_update_caption(vc->s);
     trace_gd_grab(vc->label, "kbd", reason);
@@ -1472,11 +1468,8 @@ static void gd_ungrab_keyboard(GtkDisplayState *s)
     }
     s->kbd_owner = NULL;
 
-#if GTK_CHECK_VERSION(3, 20, 0)
+    win32_kbd_set_grab(false);
     gd_grab_update(vc, false, vc->s->ptr_owner == vc);
-#else
-    gd_grab_devices(vc, false, GDK_SOURCE_KEYBOARD, 0, NULL);
-#endif
     gd_update_caption(s);
     trace_gd_ungrab(vc->label, "kbd");
 }
@@ -1493,21 +1486,9 @@ static void gd_grab_pointer(VirtualConsole *vc, const char *reason)
         }
     }
 
-#if GTK_CHECK_VERSION(3, 20, 0)
     gd_grab_update(vc, vc->s->kbd_owner == vc, true);
     gdk_device_get_position(gd_get_pointer(display),
                             NULL, &vc->s->grab_x_root, &vc->s->grab_y_root);
-#else
-    gd_grab_devices(vc, true, GDK_SOURCE_MOUSE,
-                    GDK_POINTER_MOTION_MASK |
-                    GDK_BUTTON_PRESS_MASK |
-                    GDK_BUTTON_RELEASE_MASK |
-                    GDK_BUTTON_MOTION_MASK |
-                    GDK_SCROLL_MASK,
-                    vc->s->null_cursor);
-    gdk_device_get_position(gd_get_pointer(display),
-                            NULL, &vc->s->grab_x_root, &vc->s->grab_y_root);
-#endif
     vc->s->ptr_owner = vc;
     gd_update_caption(vc->s);
     trace_gd_grab(vc->label, "ptr", reason);
@@ -1524,17 +1505,10 @@ static void gd_ungrab_pointer(GtkDisplayState *s)
     s->ptr_owner = NULL;
 
     display = gtk_widget_get_display(vc->gfx.drawing_area);
-#if GTK_CHECK_VERSION(3, 20, 0)
     gd_grab_update(vc, vc->s->kbd_owner == vc, false);
     gdk_device_warp(gd_get_pointer(display),
                     gtk_widget_get_screen(vc->gfx.drawing_area),
                     vc->s->grab_x_root, vc->s->grab_y_root);
-#else
-    gd_grab_devices(vc, false, GDK_SOURCE_MOUSE, 0, NULL);
-    gdk_device_warp(gd_get_pointer(display),
-                    gtk_widget_get_screen(vc->gfx.drawing_area),
-                    vc->s->grab_x_root, vc->s->grab_y_root);
-#endif
     gd_update_caption(s);
     trace_gd_ungrab(vc->label, "ptr");
 }
@@ -1614,12 +1588,22 @@ static gboolean gd_leave_event(GtkWidget *widget, GdkEventCrossing *crossing,
     return TRUE;
 }
 
+static gboolean gd_focus_in_event(GtkWidget *widget,
+                                  GdkEventFocus *event, gpointer opaque)
+{
+    VirtualConsole *vc = opaque;
+
+    win32_kbd_set_window(gd_win32_get_hwnd(vc));
+    return TRUE;
+}
+
 static gboolean gd_focus_out_event(GtkWidget *widget,
-                                   GdkEventCrossing *crossing, gpointer opaque)
+                                   GdkEventFocus *event, gpointer opaque)
 {
     VirtualConsole *vc = opaque;
     GtkDisplayState *s = vc->s;
 
+    win32_kbd_set_window(NULL);
     gtk_release_modifiers(s);
     return TRUE;
 }
@@ -1878,10 +1862,14 @@ static void gd_connect_vc_gfx_signals(VirtualConsole *vc)
                          G_CALLBACK(gd_enter_event), vc);
         g_signal_connect(vc->gfx.drawing_area, "leave-notify-event",
                          G_CALLBACK(gd_leave_event), vc);
+        g_signal_connect(vc->gfx.drawing_area, "focus-in-event",
+                         G_CALLBACK(gd_focus_in_event), vc);
         g_signal_connect(vc->gfx.drawing_area, "focus-out-event",
                          G_CALLBACK(gd_focus_out_event), vc);
         g_signal_connect(vc->gfx.drawing_area, "configure-event",
                          G_CALLBACK(gd_configure), vc);
+        g_signal_connect(vc->gfx.drawing_area, "grab-broken-event",
+                         G_CALLBACK(gd_grab_broken_event), vc);
     } else {
         g_signal_connect(vc->gfx.drawing_area, "key-press-event",
                          G_CALLBACK(gd_text_key_down), vc);
diff --git a/ui/sdl2-input.c b/ui/sdl2-input.c
index 1f9fe831b3..f068382209 100644
--- a/ui/sdl2-input.c
+++ b/ui/sdl2-input.c
@@ -27,6 +27,7 @@
 #include "ui/console.h"
 #include "ui/input.h"
 #include "ui/sdl2.h"
+#include "trace.h"
 
 void sdl2_process_key(struct sdl2_console *scon,
                       SDL_KeyboardEvent *ev)
@@ -38,6 +39,8 @@ void sdl2_process_key(struct sdl2_console *scon,
         return;
     }
     qcode = qemu_input_map_usb_to_qcode[ev->keysym.scancode];
+    trace_sdl2_process_key(ev->keysym.scancode, qcode,
+                           ev->type == SDL_KEYDOWN ? "down" : "up");
     qkbd_state_key_event(scon->kbd, qcode, ev->type == SDL_KEYDOWN);
 
     if (!qemu_console_is_graphic(con)) {
diff --git a/ui/sdl2.c b/ui/sdl2.c
index 61c7956da3..b23a8f0a8e 100644
--- a/ui/sdl2.c
+++ b/ui/sdl2.c
@@ -30,6 +30,7 @@
 #include "ui/sdl2.h"
 #include "sysemu/runstate.h"
 #include "sysemu/sysemu.h"
+#include "ui/win32-kbd-hook.h"
 
 static int sdl2_num_outputs;
 static struct sdl2_console *sdl2_console;
@@ -220,6 +221,7 @@ static void sdl_grab_start(struct sdl2_console *scon)
     }
     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
     gui_grab = 1;
+    win32_kbd_set_grab(true);
     sdl_update_caption(scon);
 }
 
@@ -227,6 +229,7 @@ static void sdl_grab_end(struct sdl2_console *scon)
 {
     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
     gui_grab = 0;
+    win32_kbd_set_grab(false);
     sdl_show_cursor(scon);
     sdl_update_caption(scon);
 }
@@ -325,6 +328,19 @@ static int get_mod_state(void)
     }
 }
 
+static void *sdl2_win32_get_hwnd(struct sdl2_console *scon)
+{
+#ifdef CONFIG_WIN32
+    SDL_SysWMinfo info;
+
+    SDL_VERSION(&info.version);
+    if (SDL_GetWindowWMInfo(scon->real_window, &info)) {
+        return info.info.win.window;
+    }
+#endif
+    return NULL;
+}
+
 static void handle_keydown(SDL_Event *ev)
 {
     int win;
@@ -544,6 +560,11 @@ static void handle_windowevent(SDL_Event *ev)
         sdl2_redraw(scon);
         break;
     case SDL_WINDOWEVENT_FOCUS_GAINED:
+        win32_kbd_set_grab(gui_grab);
+        if (qemu_console_is_graphic(scon->dcl.con)) {
+            win32_kbd_set_window(sdl2_win32_get_hwnd(scon));
+        }
+        /* fall through */
     case SDL_WINDOWEVENT_ENTER:
         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
             absolute_mouse_grab(scon);
@@ -558,6 +579,9 @@ static void handle_windowevent(SDL_Event *ev)
         scon->ignore_hotkeys = get_mod_state();
         break;
     case SDL_WINDOWEVENT_FOCUS_LOST:
+        if (qemu_console_is_graphic(scon->dcl.con)) {
+            win32_kbd_set_window(NULL);
+        }
         if (gui_grab && !gui_fullscreen) {
             sdl_grab_end(scon);
         }
@@ -857,17 +881,16 @@ static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
         SDL_SetWindowIcon(sdl2_console[0].real_window, icon);
     }
 
-    gui_grab = 0;
-    if (gui_fullscreen) {
-        sdl_grab_start(0);
-    }
-
     mouse_mode_notifier.notify = sdl_mouse_mode_change;
     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 
     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
     sdl_cursor_normal = SDL_GetCursor();
 
+    if (gui_fullscreen) {
+        sdl_grab_start(&sdl2_console[0]);
+    }
+
     atexit(sdl_cleanup);
 }
 
diff --git a/ui/trace-events b/ui/trace-events
index 0dcda393c1..5367fd3f16 100644
--- a/ui/trace-events
+++ b/ui/trace-events
@@ -75,6 +75,9 @@ input_event_abs(int conidx, const char *axis, int value) "con %d, axis %s, value
 input_event_sync(void) ""
 input_mouse_mode(int absolute) "absolute %d"
 
+# sdl2-input.c
+sdl2_process_key(int sdl_scancode, int qcode, const char *action) "translated SDL scancode %d to QKeyCode %d (%s)"
+
 # spice-display.c
 qemu_spice_add_memslot(int qid, uint32_t slot_id, unsigned long virt_start, unsigned long virt_end, int async) "%d %u: host virt 0x%lx - 0x%lx async=%d"
 qemu_spice_del_memslot(int qid, uint32_t gid, uint32_t slot_id) "%d gid=%u sid=%u"
diff --git a/ui/win32-kbd-hook.c b/ui/win32-kbd-hook.c
new file mode 100644
index 0000000000..1ac237db9e
--- /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;
+}