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-rwxr-xr-xshare/extensions/convert2dashes.py105
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diff --git a/share/extensions/convert2dashes.py b/share/extensions/convert2dashes.py
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+++ b/share/extensions/convert2dashes.py
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+#!/usr/bin/env python
+# coding=utf-8
+#
+# Copyright (C) 2005,2007 Aaron Spike, aaron@ekips.org
+# Copyright (C) 2009 Alvin Penner, penner@vaxxine.com
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+"""
+This extension converts a path into a dashed line using 'stroke-dasharray'
+It is a modification of the file addnodes.py
+"""
+import inkex
+from inkex import bezier, CubicSuperPath, Group, PathElement
+from inkex.localization import inkex_gettext as _
+
+
+class Dashit(inkex.EffectExtension):
+ """Extension to convert paths into dash-array line"""
+
+ def __init__(self):
+ super(Dashit, self).__init__()
+ self.not_converted = []
+
+ def effect(self):
+ for node in self.svg.selection:
+ self.convert2dash(node)
+ if self.not_converted:
+ inkex.errormsg(
+ _("Total number of objects not converted: {}\n").format(
+ len(self.not_converted)
+ )
+ )
+ # return list of IDs in case the user needs to find a specific object
+ inkex.debug(self.not_converted)
+
+ def convert2dash(self, node):
+ """Convert each selected node's dash array"""
+ if isinstance(node, Group):
+ for child in node:
+ self.convert2dash(child)
+ elif isinstance(node, PathElement):
+ self._convert(node)
+ else:
+ self.not_converted.append(node.get("id"))
+
+ @staticmethod
+ def _convert(node):
+ dashes = []
+ offset = 0
+ style = node.specified_style()
+ dashes = style("stroke-dasharray")
+ offset = style("stroke-dashoffset")
+ if not dashes:
+ return
+ new = []
+ for sub in node.path.to_superpath():
+ idash = 0
+ dash = dashes[0]
+ length = float(offset)
+ while dash < length:
+ length = length - dash
+ idash = (idash + 1) % len(dashes)
+ dash = dashes[idash]
+ new.append([sub[0][:]])
+ i = 1
+ while i < len(sub):
+ dash = dash - length
+ length = bezier.cspseglength(new[-1][-1], sub[i])
+ while dash < length:
+ new[-1][-1], nxt, sub[i] = bezier.cspbezsplitatlength(
+ new[-1][-1], sub[i], dash / length
+ )
+ if idash % 2: # create a gap
+ new.append([nxt[:]])
+ else: # splice the curve
+ new[-1].append(nxt[:])
+ length = length - dash
+ idash = (idash + 1) % len(dashes)
+ dash = dashes[idash]
+ if idash % 2:
+ new.append([sub[i]])
+ else:
+ new[-1].append(sub[i])
+ i += 1
+ style.pop("stroke-dasharray")
+ node.pop("sodipodi:type")
+ node.path = CubicSuperPath(new).to_path(rtol=1e-10)
+ node.style = style
+
+
+if __name__ == "__main__":
+ Dashit().run()