'''
Copyright (C) 2006 Jean-Francois Barraud, barraud@math.univ-lille1.fr
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
barraud@math.univ-lille1.fr
This code defines a basic class (PathModifier) of effects whose purpose is
to somehow deform given objects: one common tasks for all such effect is to
convert shapes, groups, clones to paths. The class has several functions to
make this (more or less!) easy.
As an exemple, a second class (Diffeo) is derived from it,
to implement deformations of the form X=f(x,y), Y=g(x,y)...
TODO: Several handy functions are defined, that might in fact be of general
interest and that should be shipped out in separate files...
'''
import inkex, cubicsuperpath, bezmisc, simplestyle
from simpletransform import *
import copy, math, re, random
import gettext
_ = gettext.gettext
def zSort(inNode,idList):
sortedList=[]
theid = inNode.get("id")
if theid in idList:
sortedList.append(theid)
for child in inNode:
if len(sortedList)==len(idList):
break
sortedList+=zSort(child,idList)
return sortedList
class PathModifier(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
def duplicateNodes(self, aList):
clones={}
for id,node in aList.iteritems():
clone=copy.deepcopy(node)
myid = node.tag.split('}')[-1]
clone.set("id", self.uniqueId(myid))
node.getparent().append(clone)
clones[clone.get("id")]=clone
return(clones)
def uniqueId(self, prefix):
id="%s%04i"%(prefix,random.randint(0,9999))
while len(self.document.getroot().xpath('//*[@id="%s"]' % id,namespaces=inkex.NSS)):
id="%s%04i"%(prefix,random.randint(0,9999))
return(id)
def expandGroups(self,aList,transferTransform=True):
for id, node in aList.items():
if node.tag == inkex.addNS('g','svg') or node.tag=='g':
mat=parseTransform(node.get("transform"))
for child in node:
if transferTransform:
applyTransformToNode(mat,child)
aList.update(self.expandGroups({child.get('id'):child}))
if transferTransform and node.get("transform"):
del node.attrib["transform"]
del aList[id]
return(aList)
def expandGroupsUnlinkClones(self,aList,transferTransform=True,doReplace=True):
for id in aList.keys()[:]:
node=aList[id]
if node.tag == inkex.addNS('g','svg') or node.tag=='g':
self.expandGroups(aList,transferTransform)
self.expandGroupsUnlinkClones(aList,transferTransform,doReplace)
elif node.tag == inkex.addNS('use','svg') or node.tag=='use':
refnode=self.refNode(node)
newnode=self.unlinkClone(node,doReplace)
del aList[id]
style = simplestyle.parseStyle(node.get('style') or "")
refstyle=simplestyle.parseStyle(refnode.get('style') or "")
style.update(refstyle)
newnode.set('style',simplestyle.formatStyle(style))
newid=newnode.get('id')
aList.update(self.expandGroupsUnlinkClones({newid:newnode},transferTransform,doReplace))
return aList
def recursNewIds(self,node):
if node.get('id'):
node.set('id',self.uniqueId(node.tag))
for child in node:
self.recursNewIds(child)
def refNode(self,node):
if node.get(inkex.addNS('href','xlink')):
refid=node.get(inkex.addNS('href','xlink'))
path = '//*[@id="%s"]' % refid[1:]
newNode = self.document.getroot().xpath(path, namespaces=inkex.NSS)[0]
return newNode
else:
raise AssertionError, "Trying to follow empty xlink.href attribute."
def unlinkClone(self,node,doReplace):
if node.tag == inkex.addNS('use','svg') or node.tag=='use':
newNode = copy.deepcopy(self.refNode(node))
self.recursNewIds(newNode)
applyTransformToNode(parseTransform(node.get('transform')),newNode)
if doReplace:
parent=node.getparent()
parent.insert(parent.index(node),newNode)
parent.remove(node)
return newNode
else:
raise AssertionError, "Only clones can be unlinked..."
def rectToPath(self,node,doReplace=True):
if node.tag == inkex.addNS('rect','svg'):
x =float(node.get('x'))
y =float(node.get('y'))
try:
rx=float(node.get('rx'))
ry=float(node.get('ry'))
except:
rx=0
ry=0
w =float(node.get('width' ))
h =float(node.get('height'))
d ='M %f,%f '%(x+rx,y)
d+='L %f,%f '%(x+w-rx,y)
d+='A %f,%f,%i,%i,%i,%f,%f '%(rx,ry,0,0,1,x+w,y+ry)
d+='L %f,%f '%(x+w,y+h-ry)
d+='A %f,%f,%i,%i,%i,%f,%f '%(rx,ry,0,0,1,x+w-rx,y+h)
d+='L %f,%f '%(x+rx,y+h)
d+='A %f,%f,%i,%i,%i,%f,%f '%(rx,ry,0,0,1,x,y+h-ry)
d+='L %f,%f '%(x,y+ry)
d+='A %f,%f,%i,%i,%i,%f,%f '%(rx,ry,0,0,1,x+rx,y)
newnode=inkex.etree.Element('path')
newnode.set('d',d)
newnode.set('id', self.uniqueId('path'))
newnode.set('style',node.get('style'))
nnt = node.get('transform')
if nnt:
newnode.set('transform',nnt)
fuseTransform(newnode)
if doReplace:
parent=node.getparent()
parent.insert(parent.index(node),newnode)
parent.remove(node)
return newnode
def groupToPath(self,node,doReplace=True):
if node.tag == inkex.addNS('g','svg'):
newNode = inkex.etree.SubElement(self.current_layer,inkex.addNS('path','svg'))
newstyle = simplestyle.parseStyle(node.get('style') or "")
newp = []
for child in node:
childstyle = simplestyle.parseStyle(child.get('style') or "")
childstyle.update(newstyle)
newstyle.update(childstyle)
childAsPath = self.objectToPath(child,False)
newp += cubicsuperpath.parsePath(childAsPath.get('d'))
newNode.set('d',cubicsuperpath.formatPath(newp))
newNode.set('style',simplestyle.formatStyle(newstyle))
self.current_layer.remove(newNode)
if doReplace:
parent=node.getparent()
parent.insert(parent.index(node),newNode)
parent.remove(node)
return newNode
else:
raise AssertionError
def objectToPath(self,node,doReplace=True):
if node.tag == inkex.addNS('rect','svg'):
return(self.rectToPath(node,doReplace))
if node.tag == inkex.addNS('g','svg'):
return(self.groupToPath(node,doReplace))
elif node.tag == inkex.addNS('path','svg') or node.tag == 'path':
for attName in node.attrib.keys():
if ("sodipodi" in attName) or ("inkscape" in attName):
del node.attrib[attName]
fuseTransform(node)
return node
elif node.tag == inkex.addNS('use','svg') or node.tag == 'use':
newNode = self.unlinkClone(node,doReplace)
return self.objectToPath(newNode,doReplace)
else:
inkex.errormsg(_("Please first convert objects to paths! (Got [%s].)") % node.tag)
return None
def objectsToPaths(self,aList,doReplace=True):
newSelection={}
for id,node in aList.items():
newnode=self.objectToPath(node,doReplace)
del aList[id]
aList[newnode.get('id')]=newnode
def effect(self):
self.objectsToPaths(self.selected, True)
self.bbox=computeBBox(self.selected.values())
for id, node in self.selected.iteritems():
if node.tag == inkex.addNS('path','svg'):
d = node.get('d')
p = cubicsuperpath.parsePath(d)
node.set('d',cubicsuperpath.formatPath(p))
class Diffeo(PathModifier):
def __init__(self):
inkex.Effect.__init__(self)
def applyDiffeo(self,bpt,vects=()):
'''
bpt is a base point and for v in vectors, v'=v-p is a tangent vector at bpt.
Defaults to identity!
'''
for v in vects:
v[0]-=bpt[0]
v[1]-=bpt[1]
for v in vects:
v[0]+=bpt[0]
v[1]+=bpt[1]
def effect(self):
self.expandGroupsUnlinkClones(self.selected, True)
self.expandGroups(self.selected, True)
self.objectsToPaths(self.selected, True)
self.bbox=computeBBox(self.selected.values())
for id, node in self.selected.iteritems():
if node.tag == inkex.addNS('path','svg') or node.tag=='path':
d = node.get('d')
p = cubicsuperpath.parsePath(d)
for sub in p:
for ctlpt in sub:
self.applyDiffeo(ctlpt[1],(ctlpt[0],ctlpt[2]))
node.set('d',cubicsuperpath.formatPath(p))