implement `get_tree` command

1 files changed, 27 insertions, 1 deletions

diff --git a/sway/container.c b/sway/container.c
index 21538ab4..a7e46571 100644
--- a/sway/container.c
+++ b/sway/container.c
@@ -75,6 +75,30 @@ static void free_swayc(swayc_t *cont) {
         free(cont);
 }
 
+static void update_root_geometry() {
+        int width = 0;
+        int height = 0;
+        swayc_t *child;
+        int child_width;
+        int child_height;
+
+        for (int i = 0; i < root_container.children->length; ++i) {
+                child = root_container.children->items[i];
+                child_width = child->width + child->x;
+                child_height = child->height + child->y;
+                if (child_width > width) {
+                        width = child_width;
+                }
+
+                if (child_height > height) {
+                        height = child_height;
+                }
+        }
+
+        root_container.width = width;
+        root_container.height = height;
+}
+
 // New containers
 
 swayc_t *new_output(wlc_handle handle) {
@@ -167,6 +191,7 @@ swayc_t *new_output(wlc_handle handle) {
         }
 
         free(ws_name);
+        update_root_geometry();
         return output;
 }
 
@@ -361,7 +386,7 @@ void floating_view_sane_size(swayc_t *view) {
                 view->desired_width = config->floating_maximum_width;
         }
 
-        sway_log(L_DEBUG, "Sane values for view to %d x %d @ %.f, %.f", 
+        sway_log(L_DEBUG, "Sane values for view to %d x %d @ %.f, %.f",
                 view->desired_width, view->desired_height, view->x, view->y);
 
         return;
@@ -393,6 +418,7 @@ swayc_t *destroy_output(swayc_t *output) {
         }
         sway_log(L_DEBUG, "OUTPUT: Destroying output '%" PRIuPTR "'", output->handle);
         free_swayc(output);
+        update_root_geometry();
         return &root_container;
 }