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#!/usr/bin/env python
#
# Copyright (C) 2014 Martin Owens
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
"""
Merges styles into class based styles and removes.
"""
import inkex
import sys
from collections import defaultdict
class Style(dict):
"""Controls the style/css mechanics for this effect"""
def __init__(self, attr=None):
self.weights = defaultdict(int)
self.total = []
if attr:
self.parse(attr)
def parse(self, attr):
for name,value in [ a.split(':',1) for a in attr.split(';') if ':' in a ]:
self[name.strip()] = value.strip()
def entries(self):
return [ "%s:%s;" % (n,v) for (n,v) in self.iteritems() ]
def to_str(self, sep="\n "):
return " " + "\n ".join(self.entries())
def __str__(self):
return self.to_str()
def css(self, cls):
return ".%s {\n%s\n}" % (cls, str(self))
def remove(self, keys):
for key in keys:
self.pop(key, None)
def add(self, c, el):
self.total.append( (c, el) )
for name,value in c.iteritems():
if not self.has_key(name):
self[name] = value
if self[name] == value:
self.weights[name] += 1
def clean(self, threshold):
"""Removes any elements that aren't the same using a weighted threshold"""
for attr in self.keys():
if self.weights[attr] < len(self.total) - threshold:
self.pop(attr)
def all_matches(self):
"""Returns an iter for each added element who's style matches this style"""
for (c, el) in self.total:
if self == c:
yield (c, el)
def __eq__(self, o):
"""Not equals, prefer to overload 'in' but that doesn't seem possible"""
for arg in self.keys():
if o.has_key(arg) and self[arg] != o[arg]:
return False
return True
def get_styles(document):
nodes = []
for node in document.getroot().iterchildren():
if node.tag == inkex.addNS('style', 'svg'):
return node
nodes.append(node)
ret = inkex.etree.SubElement(document.getroot(), 'style', {})
# Reorder to make the style element FIRST
for node in nodes:
document.getroot().append(node)
return ret
class MergeStyles(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
self.OptionParser.add_option("-n", "--name",
action="store", type="string",
dest="name", default='',
help="Name of selected element's common class")
def effect(self):
newclass = self.options.name
elements = self.selected.values()
common = Style()
threshold = 1
for el in elements:
common.add(Style(el.attrib['style']), el)
common.clean(threshold)
if not common:
raise KeyError("There are no common styles between these elements.")
styles = get_styles(self.document)
styles.text = (styles.text or "") + "\n" + common.css( newclass )
for (st, el) in common.all_matches():
st.remove(common.keys())
el.attrib['style'] = st.to_str("")
olds = el.attrib.has_key('class') and el.attrib['class'].split() or []
if newclass not in olds:
olds.append(newclass)
el.attrib['class'] = ' '.join(olds)
if __name__ == '__main__':
e = MergeStyles()
e.affect()
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