
While this sounds counter-intuitive, the image-path hint value might also be used with URIs or icon names. As per freedesktop standard: The "app_icon" parameter and "image-path" hint should be either an URI (file:// is the only URI schema supported right now) or a name in a freedesktop.org-compliant icon theme (not a GTK+ stock ID). Thus the image-path hint should also be parsed as it happens for the app_icon. Reuse same logic, by falling back on _iconForNotificationData with the hint value. https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/285