clean up container_get_default_layout

include/sway/tree/layout.h

@@ -55,9 +55,8 @@ void container_move_to(struct sway_container* container,
 void container_move(struct sway_container *container,
 		enum movement_direction dir, int move_amt);
 
-// TODO move to output.c
 enum sway_container_layout container_get_default_layout(
-		struct sway_container *output);
+		struct sway_container *con);
 
 // TODO move to output.c
 void container_sort_workspaces(struct sway_container *output);

sway/commands/layout.c

@@ -28,8 +28,7 @@ struct cmd_results *cmd_layout(int argc, char **argv) {
 	if (strcasecmp(argv[0], "default") == 0) {
 		container_set_layout(parent, parent->prev_layout);
 		if (parent->layout == L_NONE) {
-			struct sway_container *output = container_parent(parent, C_OUTPUT);
-			container_set_layout(parent, container_get_default_layout(output));
+			container_set_layout(parent, container_get_default_layout(parent));
 		}
 	} else {
 		if (parent->layout != L_TABBED && parent->layout != L_STACKED) {

sway/tree/container.c

@@ -405,7 +405,7 @@ struct sway_container *container_workspace_create(struct sway_container *output,
 	workspace->name = !name ? NULL : strdup(name);
 	workspace->prev_layout = L_NONE;
 	workspace->layout = container_get_default_layout(output);
-	workspace->workspace_layout = container_get_default_layout(output);
+	workspace->workspace_layout = workspace->layout;
 
 	container_add_child(output, workspace);
 	container_sort_workspaces(output);

sway/tree/layout.c

@@ -168,12 +168,22 @@ void container_move(struct sway_container *container,
 }
 
 enum sway_container_layout container_get_default_layout(
-		struct sway_container *output) {
+		struct sway_container *con) {
+	if (con->type != C_OUTPUT) {
+		con = container_parent(con, C_OUTPUT);
+	}
+
+	if (!sway_assert(con != NULL,
+			"container_get_default_layout must be called on an attached "
+			" container below the root container")) {
+		return 0;
+	}
+
 	if (config->default_layout != L_NONE) {
 		return config->default_layout;
 	} else if (config->default_orientation != L_NONE) {
 		return config->default_orientation;
-	} else if (output->width >= output->height) {
+	} else if (con->width >= con->height) {
 		return L_HORIZ;
 	} else {
 		return L_VERT;