Add script option to override shown icon

dunstrc

@@ -190,8 +190,8 @@
 # Every section that isn't one of the above is interpreted as a rules to
 # override settings for certain messages.
 # Messages can be matched by "appname", "summary", "body" or "icon" and
-# you can override the "timeout", "urgency", "foreground", "background"
-# and "format".
+# you can override the "timeout", "urgency", "foreground", "background",
+# "new_icon", and "format".
 # Shell-like globbing will get expanded.
 #
 # SCRIPTING
@@ -223,11 +223,13 @@
 #    appname = Pidgin
 #    summary = "*signed on*"
 #    urgency = low
+#    new_icon = "/usr/share/pixmaps/pidgin/status/16/log-in.png"
 #
 #[signed_off]
 #    appname = Pidgin
 #    summary = *signed off*
 #    urgency = low
+#    new_icon = "/usr/share/pixmaps/pidgin/status/16/log-out.png"
 #
 #[says]
 #    appname = Pidgin

rules.c

@@ -15,6 +15,8 @@ void rule_apply(rule_t * r, notification * n)
                 n->timeout = r->timeout;
         if (r->urgency != -1)
                 n->urgency = r->urgency;
+        if (r->new_icon)
+                n->icon = r->new_icon;
         if (r->fg)
                 n->color_strings[ColFG] = r->fg;
         if (r->bg)
@@ -50,6 +52,7 @@ void rule_init(rule_t * r)
         r->icon = NULL;
         r->timeout = -1;
         r->urgency = -1;
+        r->new_icon = NULL;
         r->fg = NULL;
         r->bg = NULL;
         r->format = NULL;

rules.h

@@ -17,6 +17,7 @@ typedef struct _rule_t {
         /* actions */
         int timeout;
         int urgency;
+        char *new_icon;
         char *fg;
         char *bg;
         const char *format;

settings.c

@@ -337,6 +337,7 @@ void load_settings(char *cmdline_config_path)
                                 free(urg);
                         }
                 }
+                r->new_icon = ini_get_string(cur_section, "new_icon", r->new_icon);
                 r->fg = ini_get_string(cur_section, "foreground", r->fg);
                 r->bg = ini_get_string(cur_section, "background", r->bg);
                 r->format = ini_get_string(cur_section, "format", r->format);

x.c

@@ -298,7 +298,7 @@ static cairo_t *get_icon_surface(char *icon_path)
                         fprintf(stderr,
                                 "Could not load icon: '%s'\n", icon_path);
         }
-        return NULL;
+        return icon_surface;
 }
 
 static colored_layout *r_init_shared(cairo_t *c, notification *n)