+/*
+ * Implementation of 'swap [container] [with] id|con_id|mark <arg>'.
+ *
+ */
+void cmd_swap(I3_CMD, const char *mode, const char *arg) {
+ HANDLE_EMPTY_MATCH;
+
+ owindow *match = TAILQ_FIRST(&owindows);
+ if (match == NULL) {
+ DLOG("No match found for swapping.\n");
+ return;
+ }
+
+ Con *con;
+ if (strcmp(mode, "id") == 0) {
+ long target;
+ if (!parse_long(arg, &target, 0)) {
+ yerror("Failed to parse %s into a window id.\n", arg);
+ return;
+ }
+
+ con = con_by_window_id(target);
+ } else if (strcmp(mode, "con_id") == 0) {
+ long target;
+ if (!parse_long(arg, &target, 0)) {
+ yerror("Failed to parse %s into a container id.\n", arg);
+ return;
+ }
+
+ con = con_by_con_id(target);
+ } else if (strcmp(mode, "mark") == 0) {
+ con = con_by_mark(arg);
+ } else {
+ yerror("Unhandled swap mode \"%s\". This is a bug.\n", mode);
+ return;
+ }
+
+ if (con == NULL) {
+ yerror("Could not find container for %s = %s\n", mode, arg);
+ return;
+ }
+
+ if (match != TAILQ_LAST(&owindows, owindows_head)) {
+ DLOG("More than one container matched the swap command, only using the first one.");
+ }
+
+ if (match->con == NULL) {
+ DLOG("Match %p has no container.\n", match);
+ ysuccess(false);
+ return;
+ }
+
+ DLOG("Swapping %p with %p.\n", match->con, con);
+ bool result = con_swap(match->con, con);
+
+ cmd_output->needs_tree_render = true;
+ ysuccess(result);
+}
+