player: receive and handle mouse click event

Implement handling of the INPUT_EVENT_MOUSE event in the player
to toggle play/pause functionality.

src/player/input.c

@@ -856,6 +856,16 @@ vlc_player_input_NavigationFallback(struct vlc_player_input *input, int nav_type
     }
 }
 
+static void
+vlc_player_input_MouseFallback(struct vlc_player_input *input,
+                               const struct vlc_input_event_mouse *ev)
+{
+    vlc_player_t *player = input->player;
+
+    if (vlc_mouse_HasPressed(&ev->oldmouse, &ev->newmouse, MOUSE_BUTTON_LEFT))
+        vlc_player_TogglePause(player);
+}
+
 static void
 input_thread_Events(input_thread_t *input_thread,
                     const struct vlc_input_event *event, void *user_data)
@@ -1035,6 +1045,9 @@ input_thread_Events(input_thread_t *input_thread,
         case INPUT_EVENT_NAV_FAILED:
             vlc_player_input_NavigationFallback(input, event->nav_type);
             break;
+        case INPUT_EVENT_MOUSE:
+            vlc_player_input_MouseFallback(input, &event->mouse_data);
+            break;
         default:
             break;
     }