Comment 12 for bug 489299

onox,

Just a quick note. They're probably not on your Gentoo system but the icons in question (folder-music, folder-picture etc) are available in Debian/Ubuntu.

Cairo-menu does the following when setting the icons for bookmarks menu item: It uses the lda book mark api, but I expect that is just based on the gio api so it should work with gio implementation also.

Get the icon name. Look for a icon of the form "folder"+icon_name. If it's not present then just use the stock icon.

If you want to see to code in question look around line 394 or gnome-menu-builder.c in cairo-menu.