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Diffstat (limited to 'dxf_export/inkex.py')
| -rwxr-xr-x | dxf_export/inkex.py | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/dxf_export/inkex.py b/dxf_export/inkex.py new file mode 100755 index 0000000..e487822 --- /dev/null +++ b/dxf_export/inkex.py @@ -0,0 +1,241 @@ +#!/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 +import gettext +from math import * +_ = gettext.gettext + +#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://creativecommons.org/ns#', +u'ccOLD' :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, 'm':3543.3070866, + 'km':3543307.0866, 'pc':15.0, 'yd':3240 , 'ft':1080} +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 + +def uutounit(val, unit): + return val/uuconv[unit] + +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 errormsg(msg): + """Intended for end-user-visible error messages. + + (Currently just writes to stderr with an appended newline, but could do + something better in future: e.g. could add markup to distinguish error + messages from status messages or debugging output.) + + Note that this should always be combined with translation: + + import gettext + _ = gettext.gettext + ... + inkex.errormsg(_("This extension requires two selected paths.")) + """ + sys.stderr.write((unicode(msg) + "\n").encode("UTF-8")) + +def check_inkbool(option, opt, value): + if str(value).capitalize() == 'True': + return True + elif str(value).capitalize() == 'False': + return False + else: + raise optparse.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 + +class Effect: + """A class for creating Inkscape SVG Effects""" + + def __init__(self, *args, **kwargs): + self.document=None + self.original_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 + + 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""" + try: + try: + stream = open(file,'r') + except: + stream = open(self.svg_file,'r') + except: + stream = sys.stdin + p = etree.XMLParser(huge_tree=True) + self.document = etree.parse(stream, parser=p) + self.original_document = copy.deepcopy(self.document) + 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 + + def getselected(self): + """Collect selected nodes""" + for i in self.options.ids: + path = '//*[@id="%s"]' % i + for node in self.document.xpath(path, namespaces=NSS): + self.selected[i] = node + + def getElementById(self, id): + path = '//*[@id="%s"]' % id + el_list = self.document.xpath(path, namespaces=NSS) + if el_list: + return el_list[0] + else: + return None + + def getParentNode(self, node): + for parent in self.document.getiterator(): + if node in parent.getchildren(): + return parent + break + + + def getdocids(self): + docIdNodes = self.document.xpath('//@id', namespaces=NSS) + for m in docIdNodes: + self.doc_ids[m] = 1 + + def getNamedView(self): + return self.document.xpath('//sodipodi:namedview', namespaces=NSS)[0] + + def createGuide(self, posX, posY, angle): + atts = { + 'position': str(posX)+','+str(posY), + 'orientation': str(sin(radians(angle)))+','+str(-cos(radians(angle))) + } + guide = etree.SubElement( + self.getNamedView(), + addNS('guide','sodipodi'), atts ) + return guide + + def output(self): + """Serialize document into XML on stdout""" + original = etree.tostring(self.original_document) + result = etree.tostring(self.document) + if original != result: + self.document.write(sys.stdout) + + def affect(self, args=sys.argv[1:], output=True): + """Affect an SVG document with a callback effect""" + self.svg_file = args[-1] + self.getoptions(args) + self.parse() + self.getposinlayer() + self.getselected() + self.getdocids() + self.effect() + if output: 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 += random.choice('0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ') + self.doc_ids[new_id] = 1 + return new_id + + def xpathSingle(self, path): + try: + retval = self.document.xpath(path, namespaces=NSS)[0] + except: + errormsg(_("No matching node for expression: %s") % path) + retval = None + return retval + + +# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 encoding=utf-8 textwidth=99 |