Add path information to the window title

The title is broken in a literal prefix and in a path suffix.
Both can be configured via X-resources.

main.c

@@ -314,6 +314,7 @@ void load_image(int new)
 	close_info();
 	open_info();
 	arl_setup(&arl, files[fileidx].path);
+	win_set_title(&win, files[fileidx].path);
 
 	if (img.multi.cnt > 0 && img.multi.animate)
 		set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
@@ -939,6 +940,7 @@ int main(int argc, char **argv)
 		load_image(fileidx);
 	}
 	win_open(&win);
+	win_set_title(&win, files[fileidx].path);
 	win_set_cursor(&win, CURSOR_WATCH);
 
 	atexit(cleanup);

sxiv.1

@@ -387,6 +387,21 @@ Color of the window foreground and bar background
 .B font
 Name of Xft bar font
 .TP
+.B titlePrefix
+Any string literal to be used as the window title prefix.
+.TP
+.B titleSuffix
+The format of the window title suffix.
+
+.EX
+    Value  Format
+    0      Basename of file
+    1      Basename of directory
+    2      Full path to file
+    3      Full path to directory
+    4      Empty string
+.EE
+.TP
 Please see xrdb(1) on how to change them.
 .SH STATUS BAR
 The information displayed on the left side of the status bar can be replaced

sxiv.h

@@ -115,6 +115,16 @@ typedef enum {
 	FF_TN_INIT = 4
 } fileflags_t;
 
+typedef enum {
+	BASE_CFILE,
+	BASE_CDIR,
+	CFILE,
+	CDIR,
+	EMPTY,
+
+	SUFFIXMODE_COUNT,
+} suffixmode_t;
+
 typedef struct {
 	const char *name; /* as given by user */
 	const char *path; /* always absolute */
@@ -410,6 +420,10 @@ struct win {
 	XftColor bg;
 	XftColor fg;
 
+	suffixmode_t suffixmode;
+	const char   *prefix;
+	const char   *suffix;
+
 	int x;
 	int y;
 	unsigned int w;

thumbs.c

@@ -35,6 +35,7 @@ void exif_auto_orientate(const fileinfo_t*);
 Imlib_Image img_open(const fileinfo_t*);
 
 static char *cache_dir;
+extern const int fileidx;
 
 char* tns_cache_filepath(const char *filepath)
 {
@@ -531,6 +532,7 @@ bool tns_move_selection(tns_t *tns, direction_t dir, int cnt)
 		if (!tns->dirty)
 			tns_highlight(tns, *tns->sel, true);
 	}
+	win_set_title(tns->win, tns->files[fileidx].path);
 	return *tns->sel != old;
 }
 

window.c

@@ -24,6 +24,7 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <libgen.h>
 #include <locale.h>
 #include <X11/cursorfont.h>
 #include <X11/Xatom.h>
@@ -119,6 +120,10 @@ void win_init(win_t *win)
 	f = win_res(db, RES_CLASS ".font", "monospace-8");
 	win_init_font(e, f);
 
+	win->prefix = win_res(db, RES_CLASS ".titlePrefix", "sxiv - ");
+	win->suffixmode = strtol(win_res(db, RES_CLASS ".titleSuffix", "0"),
+	                         NULL, 10) % SUFFIXMODE_COUNT;
+
 	bg = win_res(db, RES_CLASS ".background", "white");
 	fg = win_res(db, RES_CLASS ".foreground", "black");
 	win_alloc_color(e, bg, &win->bg);
@@ -238,8 +243,6 @@ void win_open(win_t *win)
 	}
 	free(icon_data);
 
-	win_set_title(win, "sxiv");
-
 	classhint.res_class = RES_CLASS;
 	classhint.res_name = options->res_name != NULL ? options->res_name : "sxiv";
 	XSetClassHint(e->dpy, win->xwin, &classhint);
@@ -443,17 +446,55 @@ void win_draw_rect(win_t *win, int x, int y, int w, int h, bool fill, int lw,
 		XDrawRectangle(win->env.dpy, win->buf.pm, gc, x, y, w, h);
 }
 
-void win_set_title(win_t *win, const char *title)
+void win_set_title(win_t *win, const char *path)
 {
-	XStoreName(win->env.dpy, win->xwin, title);
-	XSetIconName(win->env.dpy, win->xwin, title);
+	char *title, *suffix="";
+	static bool first_time = true;
+
+	/* Return if window is not ready yet, otherwise we get an X fault. */
+	if (win->xwin == None)
+		return;
 
+	/* Get title suffix type from X-resources. Default: BASE_CDIR. */
+	suffix = estrdup(path);
+	switch (win->suffixmode) {
+		case CFILE:
+			win->suffix = suffix;
+			break;
+		case BASE_CFILE:
+			win->suffix = basename(suffix);
+			break;
+		case CDIR:
+			win->suffix = dirname(suffix);
+			break;
+		case BASE_CDIR:
+			win->suffix = basename(dirname(suffix));
+			break;
+		case SUFFIXMODE_COUNT: // Never happens
+		case EMPTY:
+			win->suffix = "";
+			break;
+	}
+
+	/* Set the title. Some WM's that don't comply to EMWH (e.g. mwm) only use
+	 * WM_NAME for the window title, which is set by XStoreName below. */
+	title = emalloc(strlen(win->prefix) + strlen(win->suffix) + 1);
+	(void)sprintf(title, "%s%s", win->prefix, win->suffix);
 	XChangeProperty(win->env.dpy, win->xwin, atoms[ATOM__NET_WM_NAME],
 	                XInternAtom(win->env.dpy, "UTF8_STRING", False), 8,
 	                PropModeReplace, (unsigned char *) title, strlen(title));
-	XChangeProperty(win->env.dpy, win->xwin, atoms[ATOM__NET_WM_ICON_NAME],
-	                XInternAtom(win->env.dpy, "UTF8_STRING", False), 8,
-	                PropModeReplace, (unsigned char *) title, strlen(title));
+	free(title);
+	free(suffix);
+
+	/* These three atoms won't change and thus only need to be set once. */
+	if (first_time) {
+		XStoreName(win->env.dpy, win->xwin, "sxiv");
+		XSetIconName(win->env.dpy, win->xwin, "sxiv");
+		XChangeProperty(win->env.dpy, win->xwin, atoms[ATOM__NET_WM_ICON_NAME],
+		                XInternAtom(win->env.dpy, "UTF8_STRING", False), 8,
+		                PropModeReplace, (unsigned char *)"sxiv", strlen("sxiv"));
+		first_time = false;
+	}
 }
 
 void win_set_cursor(win_t *win, cursor_t cursor)