scene_graph: Implement toplevel clipping

1 files changed, 21 insertions, 6 deletions

diff --git a/sway/tree/view.c b/sway/tree/view.c
index 3bc0855b..d6984178 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -893,14 +893,29 @@ void view_update_size(struct sway_view *view) {
         container_set_geometry_from_content(con);
 }
 
-void view_center_surface(struct sway_view *view) {
+void view_center_and_clip_surface(struct sway_view *view) {
         struct sway_container *con = view->container;
-        // We always center the current coordinates rather than the next, as the
-        // geometry immediately affects the currently active rendering.
-        int x = (int) fmax(0, (con->current.content_width - view->geometry.width) / 2);
-        int y = (int) fmax(0, (con->current.content_height - view->geometry.height) / 2);
 
-        wlr_scene_node_set_position(&view->content_tree->node, x, y);
+        if (container_is_floating(con)) {
+                // We always center the current coordinates rather than the next, as the
+                // geometry immediately affects the currently active rendering.
+                int x = (int) fmax(0, (con->current.content_width - view->geometry.width) / 2);
+                int y = (int) fmax(0, (con->current.content_height - view->geometry.height) / 2);
+
+                wlr_scene_node_set_position(&view->content_tree->node, x, y);
+        } else {
+                wlr_scene_node_set_position(&view->content_tree->node, 0, 0);
+        }
+
+        // only make sure to clip the content if there is content to clip
+        if (!wl_list_empty(&con->view->content_tree->children)) {
+                wlr_scene_subsurface_tree_set_clip(&con->view->content_tree->node, &(struct wlr_box){
+                        .x = con->view->geometry.x,
+                        .y = con->view->geometry.y,
+                        .width = con->current.content_width,
+                        .height = con->current.content_height,
+                });
+        }
 }
 
 struct sway_view *view_from_wlr_surface(struct wlr_surface *wlr_surface) {