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- #!/usr/bin/env python
- """
- inkex.py
- A helper module for creating Inkscape extensions
-
- 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 sys, copy, optparse
-
- #a dictionary of all of the xmlns prefixes in a standard inkscape doc
- NSS = {
- u'sodipodi' :u'http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd',
- u'cc' :u'http://web.resource.org/cc/',
- u'svg' :u'http://www.w3.org/2000/svg',
- u'dc' :u'http://purl.org/dc/elements/1.1/',
- u'rdf' :u'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
- u'inkscape' :u'http://www.inkscape.org/namespaces/inkscape',
- u'xlink' :u'http://www.w3.org/1999/xlink'
- }
-
- try:
- import xml.dom.ext
- import xml.dom.ext.reader.Sax2
- import xml.xpath
- except:
- sys.exit('The inkex.py module requires PyXML. Please download the latest version from <http://pyxml.sourceforge.net/>.')
-
- def debug(what):
- sys.stderr.write(str(what) + "\n")
- return what
-
- def check_inkbool(option, opt, value):
- if str(value).capitalize() == 'True':
- return True
- elif str(value).capitalize() == 'False':
- return False
- else:
- raise OptionValueError("option %s: invalid inkbool value: %s" % (opt, value))
-
- class InkOption(optparse.Option):
- TYPES = optparse.Option.TYPES + ("inkbool",)
- TYPE_CHECKER = copy.copy(optparse.Option.TYPE_CHECKER)
- TYPE_CHECKER["inkbool"] = check_inkbool
-
-
- class Effect:
- """A class for creating Inkscape SVG Effects"""
- def __init__(self):
- self.document=None
- self.selected={}
- self.options=None
- self.args=None
- self.OptionParser = optparse.OptionParser(usage="usage: %prog [options] SVGfile",option_class=InkOption)
- self.OptionParser.add_option("--id",
- action="append", type="string", dest="ids", default=[],
- help="id attribute of object to manipulate")
- def effect(self):
- pass
- def getoptions(self,args=sys.argv[1:]):
- """Collect command line arguments"""
- self.options, self.args = self.OptionParser.parse_args(args)
- def parse(self,file=None):
- """Parse document in specified file or on stdin"""
- reader = xml.dom.ext.reader.Sax2.Reader()
- try:
- try:
- stream = open(file,'r')
- except:
- stream = open(self.args[-1],'r')
- except:
- stream = sys.stdin
- self.document = reader.fromStream(stream)
- stream.close()
- def getposinlayer(self):
- ctx = xml.xpath.Context.Context(self.document,processorNss=NSS)
- #defaults
- self.current_layer = self.document.documentElement
- self.view_center = (0.0,0.0)
-
- layerattr = xml.xpath.Evaluate('//sodipodi:namedview/@inkscape:current-layer',self.document,context=ctx)
- if layerattr:
- layername = layerattr[0].value
- layer = xml.xpath.Evaluate('//g[@id="%s"]' % layername,self.document,context=ctx)
- if layer:
- self.current_layer = layer[0]
-
- xattr = xml.xpath.Evaluate('//sodipodi:namedview/@inkscape:cx',self.document,context=ctx)
- yattr = xml.xpath.Evaluate('//sodipodi:namedview/@inkscape:cy',self.document,context=ctx)
- if xattr and yattr:
- x = xattr[0].value
- y = yattr[0].value
- if x and y:
- self.view_center = (float(x),float(y))
- def getselected(self):
- """Collect selected nodes"""
- for id in self.options.ids:
- path = '//*[@id="%s"]' % id
- for node in xml.xpath.Evaluate(path,self.document):
- self.selected[id] = node
- def output(self):
- """Serialize document into XML on stdout"""
- xml.dom.ext.Print(self.document)
- def affect(self):
- """Affect an SVG document with a callback effect"""
- self.getoptions()
- self.parse()
- self.getposinlayer()
- self.getselected()
- self.effect()
- self.output()
-