Implement a murder command

The murder command destroys the client that a given surface is connected
to.

include/sway/commands.h

@@ -150,6 +150,7 @@ sway_cmd cmd_input;
 sway_cmd cmd_seat;
 sway_cmd cmd_ipc;
 sway_cmd cmd_kill;
+sway_cmd cmd_murder;
 sway_cmd cmd_layout;
 sway_cmd cmd_log_colors;
 sway_cmd cmd_mark;

include/sway/tree/view.h

@@ -272,6 +272,8 @@ void view_set_tiled(struct sway_view *view, bool tiled);
 
 void view_close(struct sway_view *view);
 
+void view_murder(struct sway_view *view);
+
 void view_close_popups(struct sway_view *view);
 
 // view implementation

sway/commands.c

@@ -124,6 +124,7 @@ static const struct cmd_handler command_handlers[] = {
 	{ "mark", cmd_mark },
 	{ "max_render_time", cmd_max_render_time },
 	{ "move", cmd_move },
+	{ "murder", cmd_murder },
 	{ "nop", cmd_nop },
 	{ "opacity", cmd_opacity },
 	{ "reload", cmd_reload },

sway/commands/murder.c

@@ -0,0 +1,31 @@
+#include "log.h"
+#include "sway/input/input-manager.h"
+#include "sway/input/seat.h"
+#include "sway/tree/container.h"
+#include "sway/tree/view.h"
+#include "sway/tree/workspace.h"
+#include "sway/commands.h"
+
+static void close_container_iterator(struct sway_container *con, void *data) {
+	if (con->view) {
+		view_murder(con->view);
+	}
+}
+
+struct cmd_results *cmd_murder(int argc, char **argv) {
+    if (!root->outputs->length) {
+		return cmd_results_new(CMD_INVALID,
+				"Can't run this command while there's no outputs connected.");
+	}
+	struct sway_container *con = config->handler_context.container;
+	struct sway_workspace *ws = config->handler_context.workspace;
+
+	if (con) {
+		close_container_iterator(con, NULL);
+		container_for_each_child(con, close_container_iterator, NULL);
+	} else {
+		workspace_for_each_container(ws, close_container_iterator, NULL);
+	}
+
+	return cmd_results_new(CMD_SUCCESS, NULL);
+}

sway/meson.build

@@ -73,6 +73,7 @@ sway_sources = files(
 	'commands/inhibit_idle.c',
 	'commands/kill.c',
 	'commands/mark.c',
+  'commands/murder.c',
 	'commands/max_render_time.c',
 	'commands/opacity.c',
 	'commands/include.c',

sway/tree/view.c

@@ -454,6 +454,11 @@ void view_close(struct sway_view *view) {
 	}
 }
 
+void view_murder(struct sway_view *view) {
+	struct wl_client *client = wl_resource_get_client(view->surface->resource);
+	wl_client_destroy(client);
+}
+
 void view_close_popups(struct sway_view *view) {
 	if (view->impl->close_popups) {
 		view->impl->close_popups(view);