input-linux: add option to toggle grab on all devices
Maintain a list of all input devices. Add an option to make grab
work across all devices (so toggling grab on the keybard can switch
over the mouse too).
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1457087116-4379-3-git-send-email-kraxel@redhat.com
diff --git a/ui/input-linux.c b/ui/input-linux.c
index 5374a2e..ad43963 100644
--- a/ui/input-linux.c
+++ b/ui/input-linux.c
@@ -134,14 +134,19 @@
int fd;
bool grab_request;
bool grab_active;
+ bool grab_all;
bool keydown[KEY_CNT];
int keycount;
int wheel;
+ QTAILQ_ENTRY(InputLinux) next;
};
+static QTAILQ_HEAD(, InputLinux) inputs = QTAILQ_HEAD_INITIALIZER(inputs);
+
static void input_linux_toggle_grab(InputLinux *il)
{
intptr_t request = !il->grab_active;
+ InputLinux *item;
int rc;
rc = ioctl(il->fd, EVIOCGRAB, request);
@@ -149,6 +154,19 @@
return;
}
il->grab_active = !il->grab_active;
+
+ if (!il->grab_all) {
+ return;
+ }
+ QTAILQ_FOREACH(item, &inputs, next) {
+ if (item == il || item->grab_all) {
+ /* avoid endless loops */
+ continue;
+ }
+ if (item->grab_active != il->grab_active) {
+ input_linux_toggle_grab(item);
+ }
+ }
}
static void input_linux_event_keyboard(void *opaque)
@@ -238,6 +256,11 @@
break;
}
+ /* only send event to guest when grab is active */
+ if (!il->grab_active) {
+ continue;
+ }
+
switch (event.type) {
case EV_KEY:
switch (event.code) {
@@ -292,6 +315,8 @@
int rc, ver;
il->evdev = qemu_opt_get(opts, "evdev");
+ il->grab_all = qemu_opt_get_bool(opts, "grab-all", false);
+
if (!il->evdev) {
error_setg(errp, "no input device specified");
goto err_free;
@@ -328,6 +353,7 @@
goto err_close;
}
input_linux_toggle_grab(il);
+ QTAILQ_INSERT_TAIL(&inputs, il, next);
return 0;
err_close:
@@ -345,6 +371,9 @@
{
.name = "evdev",
.type = QEMU_OPT_STRING,
+ },{
+ .name = "grab-all",
+ .type = QEMU_OPT_BOOL,
},
{ /* end of list */ }
},
