134 lines
5.1 KiB
Python
Executable file
134 lines
5.1 KiB
Python
Executable file
#!/usr/bin/env python3
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# coding=utf-8
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#
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# Copyright (C) 2005,2007 Aaron Spike, aaron@ekips.org
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# Copyright (C) 2009 Alvin Penner, penner@vaxxine.com
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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"""
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This extension converts a path into a dashed line using 'stroke-dasharray'
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It is a modification of the file addnodes.py
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"""
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import inkex
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from inkex import bezier, CubicSuperPath, Group, PathElement
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from inkex.localization import inkex_gettext as _
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from inkex.paths.interfaces import ILengthSettings
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class Dashit(inkex.EffectExtension):
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"""Extension to convert paths into dash-array line"""
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def __init__(self):
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super(Dashit, self).__init__()
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self.not_converted = []
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def effect(self):
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for node in self.svg.selection:
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self.convert2dash(node)
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if self.not_converted:
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inkex.errormsg(
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_("Total number of objects not converted: {}\n").format(
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len(self.not_converted)
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)
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)
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# return list of IDs in case the user needs to find a specific object
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inkex.utils.debug(self.not_converted)
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def convert2dash(self, node):
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"""Convert each selected node's dash array"""
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if isinstance(node, Group):
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for child in node:
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self.convert2dash(child)
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elif isinstance(node, PathElement):
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self._convert(node)
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else:
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self.not_converted.append(node.get("id"))
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@staticmethod
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def _convert(node):
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dashes = []
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offset = 0
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overlap = 0
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dashes = node.get_computed_style("stroke-dasharray")
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offset = float(node.get_computed_style("stroke-dashoffset"))
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# Correct negative offsets
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while offset < 0:
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offset += sum(dashes)
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if not dashes:
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return
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new = inkex.Path()
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segment: inkex.Path.PathCommandProxy
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for segment in node.path.to_absolute().proxy_iterator():
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ismove = segment.letter == "M"
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if ismove:
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# Start a new subpath, reset dash counter.
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idash = 0
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dash = dashes[0]
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remaining_length = offset
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firstdrawn_index = -1
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else:
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remaining_length = segment.length() + overlap
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current = segment
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while dash < remaining_length:
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if not ismove:
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first_part, current = current.split(current.ilength(dash - overlap))
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if idash % 2: # create a gap
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new.append(inkex.paths.Move(first_part.cend_point))
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else:
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if firstdrawn_index == -1:
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firstdrawn_index = len(new)
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new.append(first_part.command)
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remaining_length = remaining_length - dash
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idash = (idash + 1) % len(dashes)
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dash = dashes[idash]
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overlap = 0
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# We have already drawn a gap
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if firstdrawn_index == -1:
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firstdrawn_index = None
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if ismove:
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new.append(segment.command)
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else:
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if idash % 2: # Process the final part of the segment
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new.append(inkex.paths.Move(current.cend_point))
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else:
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if current.letter == "Z":
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# In case of ZoneClose:
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# Replace the firstdrawn index with a moveto, and append the
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# command to the end to fix linejoins
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new.append(inkex.paths.Line(current.cend_point))
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if firstdrawn_index is not None and firstdrawn_index > -1:
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index = firstdrawn_index
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while new[index].letter != "M":
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element = new[index]
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new[index] = inkex.paths.Move(
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element.cend_point(0j, 0j)
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)
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new.append(element)
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index += 1
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else:
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if firstdrawn_index == -1:
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firstdrawn_index = len(new)
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new.append(current.to_non_shorthand())
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overlap = remaining_length
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node.style.pop("stroke-dasharray")
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node.pop("sodipodi:type")
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node.path = new
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if __name__ == "__main__":
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Dashit().run()
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