44 lines
947 B
Python
44 lines
947 B
Python
|
#!/usr/bin/env python
|
||
|
|
|
||
|
|
"""
|
||
|
|
Helpers for working with SVG.
|
||
|
|
"""
|
||
|
|
|
||
|
|
import xml.etree.ElementTree as ET
|
||
|
|
|
||
|
|
import six
|
||
|
|
|
||
|
|
HEADER = '<?xml version="1.0" standalone="no"?>\n' + \
|
||
|
|
'<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"\n' + \
|
||
|
|
'"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n'
|
||
|
|
|
||
|
|
|
||
|
|
def stringify(root):
|
||
|
|
"""
|
||
|
|
Convert an SVG XML tree to a unicode string.
|
||
|
|
"""
|
||
|
|
if six.PY3:
|
||
|
|
return ET.tostring(root, encoding='unicode')
|
||
|
|
else:
|
||
|
|
return ET.tostring(root, encoding='utf-8')
|
||
|
|
|
||
|
|
def save(f, root):
|
||
|
|
"""
|
||
|
|
Save an SVG XML tree to a file.
|
||
|
|
"""
|
||
|
|
f.write(HEADER)
|
||
|
|
f.write(stringify(root))
|
||
|
|
|
||
|
|
def translate(x, y):
|
||
|
|
"""
|
||
|
|
Generate an SVG transform statement representing a simple translation.
|
||
|
|
"""
|
||
|
|
return 'translate(%i %i)' % (x, y)
|
||
|
|
|
||
|
|
def rotate(deg, x, y):
|
||
|
|
"""
|
||
|
|
Generate an SVG transform statement representing rotation around a given
|
||
|
|
point.
|
||
|
|
"""
|
||
|
|
return 'rotate(%i %i %i)' % (deg, x, y)
|