Add Gtk.IconInfo.filename

src/Gtk/IconInfo.js

@@ -0,0 +1,4 @@
+export const getFilenameImpl =
+  iconInfo =>
+    iconInfo.get_filename()
+

src/Gtk/IconInfo.purs

@@ -1,4 +1,14 @@
-module Gtk.IconInfo where
+module Gtk.IconInfo (GtkIconInfo, filename) where
+
+import Data.Maybe (Maybe)
+import Data.Nullable (Nullable, toMaybe)
+import Prelude ((<<<))
 
 foreign import data GtkIconInfo ∷ Type
 
+-- | Returns the full path to the icon, unless it's a builtin icon.
+filename ∷ GtkIconInfo → Maybe String
+filename = toMaybe <<< getFilenameImpl
+
+foreign import getFilenameImpl ∷ GtkIconInfo → Nullable String
+