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#!/usr/bin/env python3
#coding:utf-8
# Author: ao2
# Purpose: create Inkscape layers with svgwrite
# Created: 26.01.2018
# License: MIT License
# Copyright (C) 2018 Antonio Ospite <ao2@ao2.it>
import svgwrite
from svgwrite.data.types import SVGAttribute
class InkscapeDrawing(svgwrite.Drawing):
"""An svgwrite.Drawing subclass which supports Inkscape layers"""
INKSCAPE_NAMESPACE = 'http://www.inkscape.org/namespaces/inkscape'
SODIPODI_NAMESPACE = 'http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd'
def __init__(self, *args, **kwargs):
super(InkscapeDrawing, self).__init__(*args, **kwargs)
inkscape_attributes = {
'xmlns:inkscape': SVGAttribute('xmlns:inkscape',
anim=False,
types=[],
const=frozenset([self.INKSCAPE_NAMESPACE])),
'xmlns:sodipodi': SVGAttribute('xmlns:sodipodi',
anim=False,
types=[],
const=frozenset([self.SODIPODI_NAMESPACE])),
'inkscape:groupmode': SVGAttribute('inkscape:groupmode',
anim=False,
types=[],
const=frozenset(['layer'])),
'inkscape:label': SVGAttribute('inkscape:label',
anim=False,
types=frozenset(['string']),
const=[]),
'sodipodi:insensitive': SVGAttribute('sodipodi:insensitive',
anim=False,
types=frozenset(['string']),
const=[])
}
self.validator.attributes.update(inkscape_attributes)
elements = self.validator.elements
svg_attributes = set(elements['svg'].valid_attributes)
svg_attributes.add('xmlns:inkscape')
svg_attributes.add('xmlns:sodipodi')
elements['svg'].valid_attributes = frozenset(svg_attributes)
g_attributes = set(elements['g'].valid_attributes)
g_attributes.add('inkscape:groupmode')
g_attributes.add('inkscape:label')
g_attributes.add('sodipodi:insensitive')
elements['g'].valid_attributes = frozenset(g_attributes)
self['xmlns:inkscape'] = self.INKSCAPE_NAMESPACE
self['xmlns:sodipodi'] = self.SODIPODI_NAMESPACE
def layer(self, **kwargs):
"""Create an inkscape layer.
An optional 'label' keyword argument can be passed to set a user
friendly name for the layer."""
label = kwargs.pop('label', None)
new_layer = self.g(**kwargs)
new_layer['inkscape:groupmode'] = 'layer'
if label:
new_layer['inkscape:label'] = label
return new_layer
def main():
svg = InkscapeDrawing('inkscape-test.svg', profile='full', size=(640, 480))
layer = svg.layer(label="Layer one")
layer["sodipodi:insensitive"] = "true"
svg.add(layer)
line = svg.line((100, 100), (300, 100),
stroke=svgwrite.rgb(10, 10, 16, '%'),
stroke_width='10')
layer.add(line)
text = svg.text('Test', insert=(100, 100), font_size='100', fill='red')
layer.add(text)
svg.save()
if __name__ == "__main__":
main()
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