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-rwxr-xr-xshare/extensions/handles.py63
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diff --git a/share/extensions/handles.py b/share/extensions/handles.py
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+#!/usr/bin/env python
+# coding=utf-8
+#
+# Copyright (C) 2005 Aaron Spike, aaron@ekips.org
+#
+# 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.
+#
+"""
+Draws handles of selected paths.
+"""
+
+import inkex
+from inkex.paths import Path, Curve, Move, Line, Quadratic
+from inkex.transforms import Vector2d
+
+class Handles(inkex.EffectExtension):
+ """
+ Renders the handle lines for the selected curves onto the canvas.
+ """
+ def effect(self):
+ for node in self.svg.selection.filter(inkex.PathElement).values():
+ result = Path()
+ prev = Vector2d()
+ start = None
+ for seg in node.path.to_absolute():
+ if start is None:
+ start = seg.end_point(start, prev)
+ if isinstance(seg, Curve):
+ result += [
+ Move(seg.x2, seg.y2), Line(prev.x, prev.y),
+ Move(seg.x3, seg.y3), Line(seg.x4, seg.y4),
+ ]
+ elif isinstance(seg, Quadratic):
+ result += [
+ Move(seg.x2, seg.y2), Line(prev.x, prev.y),
+ Move(seg.x2, seg.y2), Line(seg.x3, seg.y3)
+ ]
+ prev = seg.end_point(start, prev)
+
+ if not result:
+ continue
+
+ elem = node.getparent().add(inkex.PathElement())
+ elem.path = result
+ elem.style = {'stroke-linejoin': 'miter', 'stroke-width': '1.0px',
+ 'stroke-opacity': '1.0', 'fill-opacity': '1.0',
+ 'stroke': '#000000', 'stroke-linecap': 'butt',
+ 'fill': 'none'}
+
+if __name__ == '__main__':
+ Handles().run()