[1/6] gtk: check for existing grabs in gd_grab_{pointer, keyboard}

If a grab is already active for our window, do nothing.
If a grab is already active for another window, release it.

Cleanup some checks and ungrab calls in the code which are
not needed any more.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ui/gtk.c | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

On Wed, Sep 9, 2015 at 11:28 AM, Gerd Hoffmann <kraxel@redhat.com> wrote:
> If a grab is already active for our window, do nothing.
> If a grab is already active for another window, release it.
>
> Cleanup some checks and ungrab calls in the code which are
> not needed any more.
>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>  ui/gtk.c | 25 ++++++++++++++++++++-----
>  1 file changed, 20 insertions(+), 5 deletions(-)
>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

> diff --git a/ui/gtk.c b/ui/gtk.c
> index df2a79e..24a1edb 100644
> --- a/ui/gtk.c
> +++ b/ui/gtk.c
> @@ -167,6 +167,8 @@ struct GtkDisplayState {
>
>  static void gd_grab_pointer(VirtualConsole *vc);
>  static void gd_ungrab_pointer(GtkDisplayState *s);
> +static void gd_grab_keyboard(VirtualConsole *vc);
> +static void gd_ungrab_keyboard(GtkDisplayState *s);
>
>  /** Utility Functions **/
>
> @@ -849,7 +851,6 @@ static gboolean gd_button_event(GtkWidget *widget, GdkEventButton *button,
>      /* implicitly grab the input at the first click in the relative mode */
>      if (button->button == 1 && button->type == GDK_BUTTON_PRESS &&
>          !qemu_input_is_absolute() && s->ptr_owner != vc) {
> -        gd_ungrab_pointer(s);
>          if (!vc->window) {
>              gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(s->grab_item),
>                                             TRUE);
> @@ -1259,6 +1260,14 @@ static void gd_grab_devices(VirtualConsole *vc, bool grab,
>
>  static void gd_grab_keyboard(VirtualConsole *vc)
>  {
> +    if (vc->s->kbd_owner) {
> +        if (vc->s->kbd_owner == vc) {
> +            return;
> +        } else {
> +            gd_ungrab_keyboard(vc->s);
> +        }
> +    }
> +
>  #if GTK_CHECK_VERSION(3, 0, 0)
>      gd_grab_devices(vc, true, GDK_SOURCE_KEYBOARD,
>                     GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
> @@ -1292,6 +1301,15 @@ static void gd_ungrab_keyboard(GtkDisplayState *s)
>  static void gd_grab_pointer(VirtualConsole *vc)
>  {
>      GdkDisplay *display = gtk_widget_get_display(vc->gfx.drawing_area);
> +
> +    if (vc->s->ptr_owner) {
> +        if (vc->s->ptr_owner == vc) {
> +            return;
> +        } else {
> +            gd_ungrab_pointer(vc->s);
> +        }
> +    }
> +
>  #if GTK_CHECK_VERSION(3, 0, 0)
>      GdkDeviceManager *mgr = gdk_display_get_device_manager(display);
>      gd_grab_devices(vc, true, GDK_SOURCE_MOUSE,
> @@ -1352,9 +1370,7 @@ static void gd_menu_grab_input(GtkMenuItem *item, void *opaque)
>      VirtualConsole *vc = gd_vc_find_current(s);
>
>      if (gd_is_grab_active(s)) {
> -        if (!gd_grab_on_hover(s)) {
> -            gd_grab_keyboard(vc);
> -        }
> +        gd_grab_keyboard(vc);
>          gd_grab_pointer(vc);
>      } else {
>          gd_ungrab_keyboard(s);
> @@ -1415,7 +1431,6 @@ static gboolean gd_enter_event(GtkWidget *widget, GdkEventCrossing *crossing,
>      GtkDisplayState *s = vc->s;
>
>      if (gd_grab_on_hover(s)) {
> -        gd_ungrab_keyboard(s);
>          gd_grab_keyboard(vc);
>          gd_update_caption(s);
>      }
> --
> 1.8.3.1
>
>