1 files changed, 75 insertions, 0 deletions
diff --git a/share/extensions/handles.py b/share/extensions/handles.py
new file mode 100755
index 0000000..07a1974
--- /dev/null
+++ b/share/extensions/handles.py
@@ -0,0 +1,75 @@
+#!/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):
+            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.transform(node.transform)
+            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()