Handle subsurfaces in view_child_damage

1 files changed, 20 insertions, 1 deletions

diff --git a/sway/tree/view.c b/sway/tree/view.c
index 50d25c4f..ae73a687 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -630,6 +630,25 @@ void view_update_size(struct sway_view *view, int width, int height) {
         container_set_geometry_from_floating_view(view->container);
 }
 
+static void subsurface_get_root_coords(struct sway_view_child *child,
+                int *root_sx, int *root_sy) {
+        struct wlr_surface *surface = child->surface;
+        *root_sx = -child->view->geometry.x;
+        *root_sy = -child->view->geometry.y;
+
+        while (surface && wlr_surface_is_subsurface(surface)) {
+                struct wlr_subsurface *subsurface =
+                        wlr_subsurface_from_wlr_surface(surface);
+                *root_sx += subsurface->current.x;
+                *root_sy += subsurface->current.y;
+                surface = subsurface->parent;
+        }
+}
+
+static const struct sway_view_child_impl subsurface_impl = {
+        .get_root_coords = subsurface_get_root_coords,
+};
+
 static void view_subsurface_create(struct sway_view *view,
                 struct wlr_subsurface *subsurface) {
         struct sway_view_child *child = calloc(1, sizeof(struct sway_view_child));
@@ -637,7 +656,7 @@ static void view_subsurface_create(struct sway_view *view,
                 wlr_log(WLR_ERROR, "Allocation failed");
                 return;
         }
-        view_child_init(child, NULL, view, subsurface->surface);
+        view_child_init(child, &subsurface_impl, view, subsurface->surface);
 }
 
 static void view_child_damage(struct sway_view_child *child, bool whole) {