1 #!/usr/bin/env python
2 """
3 Copyright (C) 2005 Aaron Spike, aaron@ekips.org
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 """
20 import inkex, os, simplepath, cubicsuperpath
21 from ffgeom import *
22 import gettext
23 _ = gettext.gettext
25 try:
26 from subprocess import Popen, PIPE
27 bsubprocess = True
28 except:
29 bsubprocess = False
31 class Project(inkex.Effect):
32 def __init__(self):
33 inkex.Effect.__init__(self)
34 def effect(self):
35 if len(self.options.ids) < 2:
36 inkex.errormsg(_("This extension requires two selected paths. \nThe second path must be exactly four nodes long."))
37 exit()
39 #obj is selected second
40 obj = self.selected[self.options.ids[0]]
41 trafo = self.selected[self.options.ids[1]]
42 if obj.get(inkex.addNS('type','sodipodi')):
43 inkex.errormsg(_("The first selected object is of type '%s'.\nTry using the procedure Path->Object to Path." % obj.get(inkex.addNS('type','sodipodi'))))
44 exit()
45 if obj.tag == inkex.addNS('path','svg') or obj.tag == inkex.addNS('g','svg'):
46 if trafo.tag == inkex.addNS('path','svg'):
47 #distil trafo into four node points
48 trafo = cubicsuperpath.parsePath(trafo.get('d'))
49 if len(trafo[0]) < 4:
50 inkex.errormsg(_("This extension requires that the second selected path be four nodes long."))
51 exit()
52 trafo = [[Point(csp[1][0],csp[1][1]) for csp in subs] for subs in trafo][0][:4]
54 #vectors pointing away from the trafo origin
55 self.t1 = Segment(trafo[0],trafo[1])
56 self.t2 = Segment(trafo[1],trafo[2])
57 self.t3 = Segment(trafo[3],trafo[2])
58 self.t4 = Segment(trafo[0],trafo[3])
60 #query inkscape about the bounding box of obj
61 self.q = {'x':0,'y':0,'width':0,'height':0}
62 file = self.args[-1]
63 id = self.options.ids[0]
64 for query in self.q.keys():
65 if bsubprocess:
66 p = Popen('inkscape --query-%s --query-id=%s "%s"' % (query,id,file), shell=True, stdout=PIPE, stderr=PIPE)
67 rc = p.wait()
68 self.q[query] = float(p.stdout.read())
69 err = p.stderr.read()
70 else:
71 f,err = os.popen3('inkscape --query-%s --query-id=%s "%s"' % (query,id,file))[1:]
72 self.q[query] = float(f.read())
73 f.close()
74 err.close()
76 if obj.tag == inkex.addNS("path",'svg'):
77 self.process_path(obj)
78 if obj.tag == inkex.addNS("g",'svg'):
79 self.process_group(obj)
80 else:
81 if trafo.tag == inkex.addNS('g','svg'):
82 inkex.errormsg(_("The second selected object is a group, not a path.\nTry using the procedure Object->Ungroup."))
83 else:
84 inkex.errormsg(_("The second selected object is not a path.\nTry using the procedure Path->Object to Path."))
85 exit()
86 else:
87 inkex.errormsg(_("The first selected object is not a path.\nTry using the procedure Path->Object to Path."))
88 exit()
90 def process_group(self,group):
91 for node in group:
92 if node.tag == inkex.addNS('path','svg'):
93 self.process_path(node)
94 if node.tag == inkex.addNS('g','svg'):
95 self.process_group(node)
97 def process_path(self,path):
98 d = path.get('d')
99 p = cubicsuperpath.parsePath(d)
100 for subs in p:
101 for csp in subs:
102 csp[0] = self.trafopoint(csp[0])
103 csp[1] = self.trafopoint(csp[1])
104 csp[2] = self.trafopoint(csp[2])
105 path.set('d',cubicsuperpath.formatPath(p))
107 def trafopoint(self,(x,y)):
108 #Transform algorithm thanks to Jose Hevia (freon)
109 vector = Segment(Point(self.q['x'],self.q['y']),Point(x,y))
110 xratio = abs(vector.delta_x())/self.q['width']
111 yratio = abs(vector.delta_y())/self.q['height']
113 horz = Segment(self.t1.pointAtRatio(xratio),self.t3.pointAtRatio(xratio))
114 vert = Segment(self.t4.pointAtRatio(yratio),self.t2.pointAtRatio(yratio))
116 p = intersectSegments(vert,horz)
117 return [p['x'],p['y']]
119 if __name__ == '__main__':
120 e = Project()
121 e.affect()
124 # vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99