127 lines
4.8 KiB
Python
127 lines
4.8 KiB
Python
"""This submodule contains tools for creating path objects from SVG files.
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The main tool being the svg2paths() function."""
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# External dependencies
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from __future__ import division, absolute_import, print_function
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from xml.dom.minidom import parse
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from os import path as os_path, getcwd
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from shutil import copyfile
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# Internal dependencies
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from .parser import parse_path
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def polyline2pathd(polyline_d):
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"""converts the string from a polyline d-attribute to a string for a Path
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object d-attribute"""
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points = polyline_d.replace(', ', ',')
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points = points.replace(' ,', ',')
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points = points.split()
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if points[0] == points[-1]:
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closed = True
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else:
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closed = False
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d = 'M' + points.pop(0).replace(',', ' ')
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for p in points:
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d += 'L' + p.replace(',', ' ')
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if closed:
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d += 'z'
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return d
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def svg2paths(svg_file_location,
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convert_lines_to_paths=True,
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convert_polylines_to_paths=True,
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convert_polygons_to_paths=True,
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return_svg_attributes=False):
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"""
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Converts an SVG file into a list of Path objects and a list of
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dictionaries containing their attributes. This currently supports
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SVG Path, Line, Polyline, and Polygon elements.
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:param svg_file_location: the location of the svg file
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:param convert_lines_to_paths: Set to False to disclude SVG-Line objects
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(converted to Paths)
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:param convert_polylines_to_paths: Set to False to disclude SVG-Polyline
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objects (converted to Paths)
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:param convert_polygons_to_paths: Set to False to disclude SVG-Polygon
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objects (converted to Paths)
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:param return_svg_attributes: Set to True and a dictionary of
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svg-attributes will be extracted and returned
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:return: list of Path objects, list of path attribute dictionaries, and
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(optionally) a dictionary of svg-attributes
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"""
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if os_path.dirname(svg_file_location) == '':
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svg_file_location = os_path.join(getcwd(), svg_file_location)
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# if pathless_svg:
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# copyfile(svg_file_location, pathless_svg)
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# doc = parse(pathless_svg)
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# else:
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doc = parse(svg_file_location)
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def dom2dict(element):
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"""Converts DOM elements to dictionaries of attributes."""
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keys = element.attributes.keys()
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values = [val.value for val in element.attributes.values()]
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return dict(zip(keys, values))
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# Use minidom to extract path strings from input SVG
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paths = [dom2dict(el) for el in doc.getElementsByTagName('path')]
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d_strings = [el['d'] for el in paths]
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attribute_dictionary_list = paths
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# if pathless_svg:
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# for el in doc.getElementsByTagName('path'):
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# el.parentNode.removeChild(el)
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# Use minidom to extract polyline strings from input SVG, convert to
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# path strings, add to list
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if convert_polylines_to_paths:
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plins = [dom2dict(el) for el in doc.getElementsByTagName('polyline')]
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d_strings += [polyline2pathd(pl['points']) for pl in plins]
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attribute_dictionary_list += plins
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# Use minidom to extract polygon strings from input SVG, convert to
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# path strings, add to list
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if convert_polygons_to_paths:
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pgons = [dom2dict(el) for el in doc.getElementsByTagName('polygon')]
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d_strings += [polyline2pathd(pg['points']) + 'z' for pg in pgons]
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attribute_dictionary_list += pgons
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if convert_lines_to_paths:
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lines = [dom2dict(el) for el in doc.getElementsByTagName('line')]
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d_strings += [('M' + l['x1'] + ' ' + l['y1'] +
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'L' + l['x2'] + ' ' + l['y2']) for l in lines]
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attribute_dictionary_list += lines
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# if pathless_svg:
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# with open(pathless_svg, "wb") as f:
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# doc.writexml(f)
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if return_svg_attributes:
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svg_attributes = dom2dict(doc.getElementsByTagName('svg')[0])
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doc.unlink()
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path_list = [parse_path(d) for d in d_strings]
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return path_list, attribute_dictionary_list, svg_attributes
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else:
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doc.unlink()
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path_list = [parse_path(d) for d in d_strings]
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return path_list, attribute_dictionary_list
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def svg2paths2(svg_file_location,
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convert_lines_to_paths=True,
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convert_polylines_to_paths=True,
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convert_polygons_to_paths=True,
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return_svg_attributes=True):
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"""Convenience function; identical to svg2paths() except that
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return_svg_attributes=True by default. See svg2paths() docstring for more
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info."""
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return svg2paths(svg_file_location=svg_file_location,
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convert_lines_to_paths=convert_lines_to_paths,
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convert_polylines_to_paths=convert_polylines_to_paths,
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convert_polygons_to_paths=convert_polygons_to_paths,
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return_svg_attributes=return_svg_attributes)
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