#!/usr/bin/env python """ inkex.py A helper module for creating Inkscape extensions Copyright (C) 2005,2007 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, random, re #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', u'xml' :u'http://www.w3.org/XML/1998/namespace' } #a dictionary of unit to user unit conversion factors uuconv = {'in':90.0, 'pt':1.25, 'px':1, 'mm':3.5433070866, 'cm':35.433070866, 'pc':15.0} def unittouu(string): '''Returns userunits given a string representation of units in another system''' unit = re.compile('(%s)$' % '|'.join(uuconv.keys())) param = re.compile(r'(([-+]?[0-9]+(\.[0-9]*)?|[-+]?\.[0-9]+)([eE][-+]?[0-9]+)?)') p = param.match(string) u = unit.search(string) if p: retval = float(p.string[p.start():p.end()]) else: retval = 0.0 if u: try: return retval * uuconv[u.string[u.start():u.end()]] except KeyError: pass return retval try: from lxml import etree except: sys.exit('The fantastic lxml wrapper for libxml2 is required by inkex.py and therefore this extension. Please download and install the latest version from <http://cheeseshop.python.org/pypi/lxml/>, or install it through your package manager by a command like: sudo apt-get install python-lxml') 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)) def addNS(tag, ns=None): val = tag if ns!=None and len(ns)>0 and NSS.has_key(ns) and len(tag)>0 and tag[0]!='{': val = "{%s}%s" % (NSS[ns], tag) return val class InkOption(optparse.Option): TYPES = optparse.Option.TYPES + ("inkbool",) TYPE_CHECKER = copy.copy(optparse.Option.TYPE_CHECKER) TYPE_CHECKER["inkbool"] = check_inkbool 00084 class Effect: """A class for creating Inkscape SVG Effects""" def __init__(self, *args, **kwargs): self.id_characters = '0123456789abcdefghijklmnopqrstuvwkyzABCDEFGHIJKLMNOPQRSTUVWXYZ' self.document=None self.ctx=None self.selected={} self.doc_ids={} 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 00100 def getoptions(self,args=sys.argv[1:]): """Collect command line arguments""" self.options, self.args = self.OptionParser.parse_args(args) 00103 def parse(self,file=None): """Parse document in specified file or on stdin""" try: try: stream = open(file,'r') except: stream = open(self.args[-1],'r') except: stream = sys.stdin self.document = etree.parse(stream) stream.close() def getposinlayer(self): #defaults self.current_layer = self.document.getroot() self.view_center = (0.0,0.0) layerattr = self.document.xpath('//sodipodi:namedview/@inkscape:current-layer', namespaces=NSS) if layerattr: layername = layerattr[0] layer = self.document.xpath('//svg:g[@id="%s"]' % layername, namespaces=NSS) if layer: self.current_layer = layer[0] xattr = self.document.xpath('//sodipodi:namedview/@inkscape:cx', namespaces=NSS) yattr = self.document.xpath('//sodipodi:namedview/@inkscape:cy', namespaces=NSS) doc_height = unittouu(self.document.getroot().get('height')) if xattr and yattr: x = xattr[0] y = yattr[0] if x and y: self.view_center = (float(x), doc_height - float(y)) # FIXME: y-coordinate flip, eliminate it when it's gone in Inkscape 00134 def getselected(self): """Collect selected nodes""" for id in self.options.ids: path = '//*[@id="%s"]' % id for node in self.document.xpath(path, namespaces=NSS): self.selected[id] = node def getdocids(self): docIdNodes = self.document.xpath('//@id', namespaces=NSS) for m in docIdNodes: self.doc_ids[m] = 1 00144 def output(self): """Serialize document into XML on stdout""" self.document.write(sys.stdout) 00147 def affect(self): """Affect an SVG document with a callback effect""" self.getoptions() self.parse() self.getposinlayer() self.getselected() self.getdocids() self.effect() self.output() def uniqueId(self, old_id, make_new_id = True): new_id = old_id if make_new_id: while new_id in self.doc_ids: new_id = "%s%s" % (new_id,random.choice(self.id_characters)) self.doc_ids[new_id] = 1 return new_id def xpathSingle(self, path): try: retval = self.document.xpath(path, namespaces=NSS)[0] except: debug("No matching node for expression: %s" % path) retval = None return retval