Reset title when an empty title string is given

With this patch, st will reset its window title when an empty string is
given as the terminal title. For example:
	printf "\033]0;\007"

Some applications, like termdown, expect this functionality. xterm
implements it, but it seems that most other terminal emulators don't.
In any case, I don't see why there should ever be a case where the st
window doesn't have a title property.

1 files changed, 6 insertions, 0 deletions

diff --git a/x.c b/x.c
index b36fb8c..bd23686 100644
--- a/x.c
+++ b/x.c
@@ -1617,6 +1617,9 @@ xseticontitle(char *p)
         XTextProperty prop;
         DEFAULT(p, opt_title);
 
+        if (p[0] == '\0')
+                p = opt_title;
+
         if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
                                         &prop) != Success)
                 return;
@@ -1631,6 +1634,9 @@ xsettitle(char *p)
         XTextProperty prop;
         DEFAULT(p, opt_title);
 
+        if (p[0] == '\0')
+                p = opt_title;
+
         if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
                                         &prop) != Success)
                 return;