Set terminal window title using OSC escape sequences

include/tig/display.h

@@ -26,6 +26,7 @@ void update_status(const char *msg, ...) PRINTF_LIKE(1, 2);
 void update_status_with_context(const char *context, const char *msg, ...) PRINTF_LIKE(2, 3);
 void report(const char *msg, ...) PRINTF_LIKE(1, 2);
 void report_clear(void);
+void set_terminal_title(const char *title);
 
 /*
  * Display management.

src/display.c

@@ -571,6 +571,15 @@ report_clear(void)
 	update_view_title(view);
 }
 
+static void
+restore_terminal_title(void)
+{
+	static const char restore_seq[] = "\033[23;2t";
+
+	if (opt_tty.fd >= 0)
+		write(opt_tty.fd, restore_seq, sizeof(restore_seq) - 1);
+}
+
 static void
 done_display(void)
 {
@@ -581,6 +590,7 @@ done_display(void)
 		}
 		curs_set(1);
 		endwin();
+		restore_terminal_title();
 	}
 	cursed = false;
 
@@ -606,6 +616,29 @@ set_terminal_modes(void)
 	leaveok(stdscr, false);
 }
 
+void
+set_terminal_title(const char *title)
+{
+	char buf[SIZEOF_STR];
+	int len;
+
+	if (opt_tty.fd < 0)
+		return;
+
+	len = snprintf(buf, sizeof(buf), "\033]0;%s\007", title);
+	if (len > 0 && (size_t) len < sizeof(buf))
+		write(opt_tty.fd, buf, len);
+}
+
+static void
+save_terminal_title(void)
+{
+	static const char save_seq[] = "\033[22;2t";
+
+	if (opt_tty.fd >= 0)
+		write(opt_tty.fd, save_seq, sizeof(save_seq) - 1);
+}
+
 void
 init_tty(void)
 {
@@ -665,6 +698,7 @@ init_display(void)
 		die("Failed to initialize curses");
 
 	set_terminal_modes();
+	save_terminal_title();
 	init_colors();
 
 	getmaxyx(stdscr, y, x);

src/view.c

@@ -664,6 +664,37 @@ update_view(struct view *view)
 	return true;
 }
 
+static const char *
+get_repo_name(void)
+{
+	static char name[SIZEOF_REF];
+	char *resolved, *base, *dir;
+
+	if (*name)
+		return name;
+
+	if (!*repo.git_dir) {
+		string_ncopy(name, "unknown", 7);
+		return name;
+	}
+
+	resolved = realpath(repo.git_dir, NULL);
+	if (!resolved) {
+		string_ncopy(name, "unknown", 7);
+		return name;
+	}
+
+	base = basename(resolved);
+	if (!strcmp(base, ".git")) {
+		dir = dirname(resolved);
+		base = basename(dir);
+	}
+
+	string_ncopy(name, base, strlen(base));
+	free(resolved);
+	return name;
+}
+
 void
 update_view_title(struct view *view)
 {
@@ -712,6 +743,14 @@ update_view_title(struct view *view)
 	lines = view->lines ? MIN(view_lines, view->lines) * 100 / view->lines : 0;
 	mvwprintw(window, 0, view->width - count_digits(lines) - 1, "%u%%", lines);
 
+	if (view == display[current_view]) {
+		char title[SIZEOF_STR];
+
+		snprintf(title, sizeof(title), "tig (%s): %s",
+			 get_repo_name(), view->name);
+		set_terminal_title(title);
+	}
+
 	wnoutrefresh(window);
 }