commands: Learn 'move workspace to output <direction|name>'.

include/layout.h

@@ -47,6 +47,7 @@ void swap_geometry(swayc_t *a, swayc_t *b);
 
 void move_container(swayc_t* container, enum movement_direction direction);
 void move_container_to(swayc_t* container, swayc_t* destination);
+void move_workspace_to(swayc_t* workspace, swayc_t* destination);
 
 // Layout
 void update_geometry(swayc_t *view);

sway.5.txt

@@ -102,9 +102,9 @@ Commands
 	Moves the focused container to the workspace identified by _name_.
 	_name_ may be a special workspace name. See **workspace**.
 
-**move** <container|window> to output <name|direction>::
-	Moves the focused container to the output identified by _name_ or _direction_.
-	_direction_ may be one of _up_, _down_, _left_, _right_.
+**move** <container|window|workspace> to output <name|direction>::
+	Moves the focused container or workspace to the output identified by _name_ or
+	_direction_. _direction_ may be one of _up_, _down_, _left_, _right_.
 
 **mouse_warping** <output|none>::
 	When _output_: place mouse at center of newly focused window when changing

sway/commands.c

@@ -556,7 +556,7 @@ static struct cmd_results *cmd_move(int argc, char **argv) {
 	}
 	const char* expected_syntax = "Expected 'move <left|right|up|down>' or "
 		"'move <container|window> to workspace <name>' or "
-		"'move <container|window> to output <name|direction>'";
+		"'move <container|window|workspace> to output <name|direction>'";
 	swayc_t *view = get_focused_container(&root_container);
 
 	if (strcasecmp(argv[0], "left") == 0) {
@@ -607,6 +607,25 @@ static struct cmd_results *cmd_move(int argc, char **argv) {
 		} else {
 			return cmd_results_new(CMD_INVALID, "move", expected_syntax);
 		}
+	} else if (strcasecmp(argv[0], "workspace") == 0) {
+		// move workspace (to output x)
+		swayc_t *output = NULL;
+		if ((error = checkarg(argc, "move workspace", EXPECTED_EQUAL_TO, 4))) {
+			return error;
+		} else if (strcasecmp(argv[1], "to") != 0 || strcasecmp(argv[2], "output") != 0) {
+			return cmd_results_new(CMD_INVALID, "move", expected_syntax);
+		} else if (!(output = output_by_name(argv[3]))) {
+			return cmd_results_new(CMD_FAILURE, "move workspace",
+				"Can't find output with name/at direction '%s'", argv[3]);
+		}
+		if (view->type == C_WORKSPACE) {
+			// This probably means we're moving an empty workspace, but
+			// that's fine.
+			move_workspace_to(view, output);
+		} else {
+			swayc_t *workspace = swayc_parent_by_type(view, C_WORKSPACE);
+			move_workspace_to(workspace, output);
+		}
 	} else if (strcasecmp(argv[0], "scratchpad") == 0) {
 		// move scratchpad ...
 		if (view->type != C_CONTAINER && view->type != C_VIEW) {

sway/layout.c

@@ -317,6 +317,30 @@ void move_container_to(swayc_t* container, swayc_t* destination) {
 	}
 }
 
+void move_workspace_to(swayc_t* workspace, swayc_t* destination) {
+	if (workspace == destination || swayc_is_parent_of(workspace, destination)) {
+		return;
+	}
+	swayc_t *src_op = remove_child(workspace);
+	// reset container geometry
+	workspace->width = workspace->height = 0;
+	add_child(destination, workspace);
+	// Refocus destination (change to new workspace)
+	set_focused_container(get_focused_view(workspace));
+	arrange_windows(destination, -1, -1);
+	update_visibility(destination);
+
+	// make sure source output has a workspace
+	if (src_op->children->length == 0) {
+		char *ws_name = workspace_next_name();
+		swayc_t *ws = new_workspace(src_op, ws_name);
+		ws->is_focused = true;
+		free(ws_name);
+	}
+	set_focused_container(get_focused_view(src_op));
+	update_visibility(src_op);
+}
+
 void update_geometry(swayc_t *container) {
 	if (container->type != C_VIEW) {
 		return;