#!/usr/bin/env python

from xml.dom import minidom
import gconf
import os
import random

client = gconf.client_get_default()

def decodeWP(node):
	results = {}
	for value in node.childNodes:
		if value.nodeType==1:
			ndata = ''
			for val in value.childNodes:
                                if val.nodeType==3: # TEXT_NODE
                                        ndata = ndata + val.data
			results[value.tagName] = ndata
	return results;

settings = os.path.expanduser('~') + '/.gnome2/backgrounds.xml'
xmldoc = minidom.parse(settings)

wallpapers = [];
for child in xmldoc.childNodes:
	if child.nodeType==1:
		if child.tagName=='wallpapers':
			for wp in child.childNodes:
				if wp.nodeType==1:
					if wp.tagName=='wallpaper':
						wallpapers.append(decodeWP(wp))

random.seed()
index = random.randint(0, len(wallpapers)-1)
changeSet = gconf.ChangeSet()

wp = wallpapers[index]
gs = '/desktop/gnome/background/'

print 'Setting background to: ' + wp['name']
changeSet.set_string(gs + 'picture_filename',   wp['filename'])
changeSet.set_string(gs + 'picture_options',    wp['options'])
changeSet.set_string(gs + 'primary_color',      wp['pcolor'])
changeSet.set_string(gs + 'secondary_color',    wp['scolor'])
changeSet.set_string(gs + 'color_shading_type', wp['shade_type'])

client.commit_change_set(changeSet, True)