src/cursor.c: Reduce damage on button hover detection

diff --git a/src/cursor.c b/src/cursor.c
index f0498d6700a98b9a53e3b09f69094efdbc6e0f75..8e3227c7504ae64434cbad0d943c64549968fc46 100644 (file)
--- a/src/cursor.c
+++ b/src/cursor.c
@@ -170,10 +170,28 @@ input_inhibit_blocks_surface(struct seat *seat, struct wl_resource *resource)
                inhibiting_client != wl_resource_get_client(resource);
 }
 
+static struct output *
+get_output(struct server *server, struct wlr_cursor *cursor)
+{
+       struct wlr_output *wlr_output = wlr_output_layout_output_at(
+                       server->output_layout, cursor->x, cursor->y);
+       return output_from_wlr_output(server, wlr_output);
+}
+
+static void
+damage_whole_current_output(struct server *server)
+{
+       struct output *output = get_output(server, server->seat.cursor);
+       if (output) {
+               wlr_output_damage_add_whole(output->damage);
+       }
+}
+
 static void
 process_cursor_motion(struct server *server, uint32_t time)
 {
        static bool cursor_name_set_by_server;
+       static enum ssd_part_type last_button_hover = LAB_SSD_NONE;
 
        /* If the mode is non-passthrough, delegate to those functions. */
        if (server->input_mode == LAB_INPUT_STATE_MOVE) {
@@ -257,7 +275,17 @@ process_cursor_motion(struct server *server, uint32_t time)
        }
 
        /* Required for iconify/maximize/close button mouse-over deco */
-       damage_all_outputs(server);
+       if (ssd_is_button(view_area)) {
+               if (last_button_hover != view_area) {
+                       /* Cursor entered new button area */
+                       damage_whole_current_output(server);
+                       last_button_hover = view_area;
+               }
+       } else if (last_button_hover != LAB_SSD_NONE) {
+               /* Cursor left button area */
+               damage_whole_current_output(server);
+               last_button_hover = LAB_SSD_NONE;
+       }
 
        if (surface &&
            !input_inhibit_blocks_surface(&server->seat, surface->resource)) {