#!/usr/bin/env python 
'''
Copyright (C) 2005 Aaron Spike, aaron@ekips.org

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
'''

import inkex, base64

class MyEffect(inkex.Effect):
	def __init__(self):
		inkex.Effect.__init__(self)
		self.OptionParser.add_option("--filepath",
						action="store", type="string", 
						dest="filepath", default=None,
						help="")
	def effect(self):
		ctx = inkex.xml.xpath.Context.Context(self.document,processorNss=inkex.NSS)
		
		# exbed the first embedded image
		path = self.options.filepath
		if (path != ''):
			if (self.options.ids):
				for id, node in self.selected.iteritems():
					if node.tagName == 'image':
						xlink = node.attributes.getNamedItemNS(inkex.NSS[u'xlink'],'href')
						if (xlink.value[:4]=='data'):
							comma = xlink.value.find(',')
							if comma>0:
								data = base64.decodestring(xlink.value[comma:])
								open(path,'wb').write(data)
								xlink.value = path
							else:
								inkex.debug('Difficulty finding the image data.')
							break

e = MyEffect()
e.affect()
