New command: i_alternate, go to last image, issue #65

commands.c

@@ -46,6 +46,7 @@ extern win_t win;
 
 extern fileinfo_t *files;
 extern int filecnt, fileidx;
+extern int alternate;
 
 extern int prefix;
 
@@ -155,6 +156,15 @@ bool i_navigate(arg_t a) {
 	return false;
 }
 
+bool i_alternate(arg_t a) {
+	if (mode == MODE_IMAGE) {
+		load_image(alternate);
+		return true;
+	} else {
+		return false;
+	}
+}
+
 bool it_first(arg_t a) {
 	if (mode == MODE_IMAGE && fileidx != 0) {
 		load_image(0);

commands.h

@@ -49,6 +49,7 @@ bool t_reload_all(arg_t);
 bool it_reload_image(arg_t);
 bool it_remove_image(arg_t);
 bool i_navigate(arg_t);
+bool i_alternate(arg_t);
 bool it_first(arg_t);
 bool it_n_or_last(arg_t);
 bool i_navigate_frame(arg_t);

config.def.h

@@ -73,6 +73,7 @@ static const keymap_t keys[] = {
 	{ false,  XK_BackSpace,     i_navigate,           (arg_t) -1 },
 	{ false,  XK_bracketright,  i_navigate,           (arg_t) +10 },
 	{ false,  XK_bracketleft,   i_navigate,           (arg_t) -10 },
+	{ true,   XK_6,             i_alternate,          (arg_t) None },
 	{ false,  XK_g,             it_first,             (arg_t) None },
 	{ false,  XK_G,             it_n_or_last,         (arg_t) None },
 

main.c

@@ -62,6 +62,7 @@ win_t win;
 
 fileinfo_t *files;
 int filecnt, fileidx;
+int alternate;
 size_t filesize;
 
 int prefix;
@@ -217,6 +218,7 @@ void load_image(int new) {
 	}
 
 	files[new].loaded = true;
+	alternate = fileidx;
 	fileidx = new;
 	if (stat(files[new].path, &fstats) == 0)
 		filesize = fstats.st_size;