transaction: Account for full size when centering content

The centering logic needs to take borders, titlebars and CSDs into
account. Instead of using the main surface geometry, use the container
and view geometry, which account for this.

sway/desktop/transaction.c

@@ -255,20 +255,20 @@ static void apply_container_state(struct sway_container *container,
 	// the container. This is important for fullscreen views which
 	// refuse to resize to the size of the output.
 	if (view && view->surface) {
-		if (view->surface->current.width < container->width) {
-			container->surface_x = container->content_x +
-				(container->content_width - view->surface->current.width) / 2;
+		if (view->geometry.width < container->current.content_width) {
+			container->surface_x = container->current.content_x +
+				(container->current.content_width - view->geometry.width) / 2;
 		} else {
-			container->surface_x = container->content_x;
+			container->surface_x = container->current.content_x;
 		}
-		if (view->surface->current.height < container->height) {
-			container->surface_y = container->content_y +
-				(container->content_height - view->surface->current.height) / 2;
+		if (view->geometry.height < container->current.content_height) {
+			container->surface_y = container->current.content_y +
+				(container->current.content_height - view->geometry.height) / 2;
 		} else {
-			container->surface_y = container->content_y;
+			container->surface_y = container->current.content_y;
 		}
-		container->surface_width = view->surface->current.width;
-		container->surface_height = view->surface->current.height;
+		container->surface_width = container->current.content_width;
+		container->surface_height = container->current.content_height;
 	}
 
 	if (!container->node.destroying) {