Impliment i3-style marks

This commit adds three commands to sway: `show_marks`, `mark` and
`unmark`. Marks are displayed right-aligned in the window border as i3
does. Marks may be found using criteria.

Fixes #1007

1 files changed, 31 insertions, 0 deletions

diff --git a/sway/commands/unmark.c b/sway/commands/unmark.c
new file mode 100644
index 00000000..34a2ae44
--- /dev/null
+++ b/sway/commands/unmark.c
@@ -0,0 +1,31 @@
+#include <string.h>
+#include <strings.h>
+#include "sway/commands.h"
+#include "list.h"
+#include "stringop.h"
+
+struct cmd_results *cmd_unmark(int argc, char **argv) {
+	swayc_t *view = get_focused_container(&root_container);
+
+	if (view->marks) {
+		if (argc) {
+			char *mark = join_args(argv, argc);
+			int index;
+			if ((index = list_seq_find(view->marks, (int (*)(const void *, const void *))strcmp, mark)) != -1) {
+				free(view->marks->items[index]);
+				list_del(view->marks, index);
+
+				if (view->marks->length == 0) {
+					list_free(view->marks);
+					view->marks = NULL;
+				}
+			}
+			free(mark);
+		} else {
+			list_foreach(view->marks, free);
+			list_free(view->marks);
+			view->marks = NULL;
+		}
+	}
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}