Add kbd_mouse_has_absolute()

kbd_mouse_is_absolute tells us whether the current mouse handler is an absolute
device.  kbd_mouse_has_absolute tells us whether we have any device that is
capable of absolute input.

This lets us tell a user that they have configured an absolute device but that
the guest is not currently using it.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

2 files changed, 18 insertions, 0 deletions

diff --git a/console.h b/console.h
index 94d9caea1f..f3c619f0f8 100644
--- a/console.h
+++ b/console.h
@@ -53,8 +53,13 @@ void qemu_remove_led_event_handler(QEMUPutLEDEntry *entry);
 void kbd_put_keycode(int keycode);
 void kbd_put_ledstate(int ledstate);
 void kbd_mouse_event(int dx, int dy, int dz, int buttons_state);
+
+/* Does the current mouse generate absolute events */
 int kbd_mouse_is_absolute(void);
 
+/* Of all the mice, is there one that generates absolute events */
+int kbd_mouse_has_absolute(void);
+
 struct MouseTransformInfo {
     /* Touchscreen resolution */
     int x;
diff --git a/input.c b/input.c
index 397bfc5396..8d5a14d2da 100644
--- a/input.c
+++ b/input.c
@@ -153,6 +153,19 @@ int kbd_mouse_is_absolute(void)
     return QTAILQ_FIRST(&mouse_handlers)->qemu_put_mouse_event_absolute;
 }
 
+int kbd_mouse_has_absolute(void)
+{
+    QEMUPutMouseEntry *entry;
+
+    QTAILQ_FOREACH(entry, &mouse_handlers, node) {
+        if (entry->qemu_put_mouse_event_absolute) {
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
 static void info_mice_iter(QObject *data, void *opaque)
 {
     QDict *mouse;