svgwrite_inkscape_drawing.py

   1 #!/usr/bin/env python
   2 #coding:utf-8
   3 # Author:  ao2
   4 # Purpose: create Inkscape layers with svgwrite
   5 # Created: 26.01.2018
   6 # License: MIT License
   7 # Copyright (C) 2018  Antonio Ospite <ao2@ao2.it>
   8
   9 import svgwrite
  10 from svgwrite.data.types import SVGAttribute
  11
  12
  13 class InkscapeDrawing(svgwrite.Drawing):
  14     """An svgwrite.Drawing subclass which supports Inkscape layers"""
  15     INKSCAPE_NAMESPACE = 'http://www.inkscape.org/namespaces/inkscape'
  16     SODIPODI_NAMESPACE = 'http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd'
  17
  18     def __init__(self, *args, **kwargs):
  19         super(InkscapeDrawing, self).__init__(*args, **kwargs)
  20
  21         inkscape_attributes = {
  22             'xmlns:inkscape': SVGAttribute('xmlns:inkscape',
  23                                            anim=False,
  24                                            types=[],
  25                                            const=frozenset([self.INKSCAPE_NAMESPACE])),
  26             'xmlns:sodipodi': SVGAttribute('xmlns:sodipodi',
  27                                            anim=False,
  28                                            types=[],
  29                                            const=frozenset([self.SODIPODI_NAMESPACE])),
  30             'inkscape:groupmode': SVGAttribute('inkscape:groupmode',
  31                                                anim=False,
  32                                                types=[],
  33                                                const=frozenset(['layer'])),
  34             'inkscape:label': SVGAttribute('inkscape:label',
  35                                            anim=False,
  36                                            types=frozenset(['string']),
  37                                            const=[]),
  38             'sodipodi:insensitive': SVGAttribute('sodipodi:insensitive',
  39                                                  anim=False,
  40                                                  types=frozenset(['string']),
  41                                                  const=[])
  42         }
  43
  44         self.validator.attributes.update(inkscape_attributes)
  45
  46         elements = self.validator.elements
  47
  48         svg_attributes = set(elements['svg'].valid_attributes)
  49         svg_attributes.add('xmlns:inkscape')
  50         svg_attributes.add('xmlns:sodipodi')
  51         elements['svg'].valid_attributes = frozenset(svg_attributes)
  52
  53         g_attributes = set(elements['g'].valid_attributes)
  54         g_attributes.add('inkscape:groupmode')
  55         g_attributes.add('inkscape:label')
  56         g_attributes.add('sodipodi:insensitive')
  57         elements['g'].valid_attributes = frozenset(g_attributes)
  58
  59         self['xmlns:inkscape'] = self.INKSCAPE_NAMESPACE
  60         self['xmlns:sodipodi'] = self.SODIPODI_NAMESPACE
  61
  62     def layer(self, **kwargs):
  63         """Create an inkscape layer.
  64
  65         An optional 'label' keyword argument can be passed to set a user
  66         friendly name for the layer."""
  67         label = kwargs.pop('label', None)
  68
  69         new_layer = self.g(**kwargs)
  70         new_layer['inkscape:groupmode'] = 'layer'
  71
  72         if label:
  73             new_layer['inkscape:label'] = label
  74
  75         return new_layer
  76
  77
  78 def main():
  79     svg = InkscapeDrawing('inkscape-test.svg', profile='full', size=(640, 480))
  80
  81     layer = svg.layer(label="Layer one")
  82     layer["sodipodi:insensitive"] = "true"
  83     svg.add(layer)
  84
  85     line = svg.line((100, 100), (300, 100),
  86                     stroke=svgwrite.rgb(10, 10, 16, '%'),
  87                     stroke_width='10')
  88     layer.add(line)
  89
  90     text = svg.text('Test', insert=(100, 100), font_size='100', fill='red')
  91     layer.add(text)
  92
  93     svg.save()
  94
  95
  96 if __name__ == "__main__":
  97     main()