add sandbox gadget event to indicate gadget removal

ref T6443

src/bin/e_gadget_loader.c

@@ -59,11 +59,21 @@ _gadget_gravity(void *data, struct e_gadget *e_gadget EINA_UNUSED, uint32_t grav
    win_emit(data, "gadget_site_gravity", gravity);
 }
 
+static void
+_gadget_removed(void *data, struct e_gadget *e_gadget EINA_UNUSED)
+{
+   Evas_Object *win;
+
+   win = eina_list_data_get(eina_hash_find(wins, &data));
+   evas_object_smart_callback_call(win, "gadget_removed", NULL);
+}
+
 static const struct e_gadget_listener _gadget_listener =
 {
    _gadget_anchor,
    _gadget_orient,
    _gadget_gravity,
+   _gadget_removed,
 };
 
 static void

src/bin/e_gadget_runner.c

@@ -349,6 +349,8 @@ runner_removed(void *data, Evas_Object *obj EINA_UNUSED, void *event_info)
 {
    Instance *inst = data;
    if (inst->box != event_info) return;
+   if (inst->ci->sandbox && inst->gadget_resource)
+     e_gadget_send_gadget_removed(inst->gadget_resource);
    rconfig->items = eina_list_remove(rconfig->items, inst->ci);
    eina_stringshare_del(inst->ci->cmd);
    E_FREE(inst->ci);

src/protocol/e-gadget.xml

@@ -30,6 +30,7 @@
     <event name="gadget_gravity">
       <arg name="gravity" type="uint" enum="gravity"/>
     </event>
+    <event name="gadget_removed"/>
     <request name="open_uri">
       <arg name="uri" type="string"/>
     </request>