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     def __init__(self, *args, **kwargs):
  16         super(InkscapeDrawing, self).__init__(*args, **kwargs)
  17
  18         inkscape_attributes = {
  19             'xmlns:inkscape': SVGAttribute('xmlns:inkscape',
  20                                            anim=False,
  21                                            types=[],
  22                                            const=frozenset(['http://www.inkscape.org/namespaces/inkscape'])),
  23             'xmlns:sodipodi': SVGAttribute('xmlns:sodipodi',
  24                                            anim=False,
  25                                            types=[],
  26                                            const=frozenset(['http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd'])),
  27             'inkscape:groupmode': SVGAttribute('inkscape:groupmode',
  28                                                anim=False,
  29                                                types=[],
  30                                                const=frozenset(['layer'])),
  31             'inkscape:label': SVGAttribute('inkscape:label',
  32                                            anim=False,
  33                                            types=frozenset(['string']),
  34                                            const=[]),
  35             'sodipodi:insensitive': SVGAttribute('sodipodi:insensitive',
  36                                            anim=False,
  37                                            types=frozenset(['string']),
  38                                            const=[])
  39         }
  40
  41         self.validator.attributes.update(inkscape_attributes)
  42
  43         elements = self.validator.elements
  44
  45         svg_attributes = set(elements['svg'].valid_attributes)
  46         svg_attributes.add('xmlns:inkscape')
  47         svg_attributes.add('xmlns:sodipodi')
  48         elements['svg'].valid_attributes = frozenset(svg_attributes)
  49
  50         g_attributes = set(elements['g'].valid_attributes)
  51         g_attributes.add('inkscape:groupmode')
  52         g_attributes.add('inkscape:label')
  53         g_attributes.add('sodipodi:insensitive')
  54         elements['g'].valid_attributes = frozenset(g_attributes)
  55
  56         self['xmlns:inkscape'] = 'http://www.inkscape.org/namespaces/inkscape'
  57         self['xmlns:sodipodi'] = 'http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd'
  58
  59     def layer(self, **kwargs):
  60         """Create an inkscape layer.
  61
  62         An optional 'label' keyword argument can be passed to set a user
  63         friendly name for the layer."""
  64         label = kwargs.pop('label', None)
  65
  66         new_layer = self.g(**kwargs)
  67         new_layer['inkscape:groupmode'] = 'layer'
  68
  69         if label:
  70             new_layer['inkscape:label'] = label
  71
  72         return new_layer
  73
  74
  75 def main():
  76     svg = InkscapeDrawing('inkscape-test.svg', profile='full', size=(640, 480))
  77
  78     layer = svg.layer(label="Layer one")
  79     layer["sodipodi:insensitive"] = "true"
  80     svg.add(layer)
  81
  82     line = svg.line((100, 100), (300, 100),
  83                     stroke=svgwrite.rgb(10, 10, 16, '%'),
  84                     stroke_width='10')
  85     layer.add(line)
  86
  87     text = svg.text('Test', insert=(100, 100), font_size='100', fill='red')
  88     layer.add(text)
  89
  90     svg.save()
  91
  92
  93 if __name__ == "__main__":
  94     main()