1 files changed, 95 insertions, 0 deletions
diff --git a/share/extensions/path_number_nodes.py b/share/extensions/path_number_nodes.py
new file mode 100755
index 0000000..e43fce4
--- /dev/null
+++ b/share/extensions/path_number_nodes.py
@@ -0,0 +1,95 @@
+#!/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.
+#
+import math
+
+import inkex
+from inkex import TextElement, Circle
+from inkex.localization import inkex_gettext as _
+
+
+class NumberNodes(inkex.EffectExtension):
+    """Replace the selection's nodes with numbered dots according to the options"""
+
+    def add_arguments(self, pars):
+        pars.add_argument(
+            "--dotsize", default="10px", help="Size of the dots on the path nodes"
+        )
+        pars.add_argument("--fontsize", default="20px", help="Size of node labels")
+        pars.add_argument(
+            "--start", type=int, default=1, help="First number in the sequence"
+        )
+        pars.add_argument(
+            "--step", type=int, default=1, help="Numbering step between two nodes"
+        )
+        pars.add_argument("--tab", help="The selected UI-tab when OK was pressed")
+
+    def effect(self):
+        filtered = self.svg.selection.filter(inkex.PathElement)
+        if not filtered:
+            raise inkex.AbortExtension(_("Please select at least one path object."))
+        for node in filtered:
+            self.add_dot(node)
+
+    def add_dot(self, node: inkex.PathElement):
+        """Add a dot label for this path element"""
+        group: inkex.Group = node.getparent().add(inkex.Group())
+        dot_group = group.add(inkex.Group())
+        num_group = group.add(inkex.Group())
+        path_trans_applied = node.path.transform(node.composed_transform())
+        group.transform = -node.getparent().composed_transform()
+
+        style = inkex.Style({"stroke": "none", "fill": "#000"})
+
+        for step, (x, y) in enumerate(path_trans_applied.end_points):
+            circle = dot_group.add(
+                Circle(
+                    cx=str(x),
+                    cy=str(y),
+                    r=str(self.svg.unittouu(self.options.dotsize) / 2),
+                )
+            )
+            circle.style = style
+            num_group.append(
+                self.add_text(
+                    x + (self.svg.unittouu(self.options.dotsize) / 2),
+                    y - (self.svg.unittouu(self.options.dotsize) / 2),
+                    self.options.start + (self.options.step * step),
+                )
+            )
+
+        node.delete()
+
+    def add_text(self, x, y, text):
+        """Add a text label at the given location"""
+        elem = TextElement(x=str(x), y=str(y))
+        elem.text = str(text)
+        elem.style = {
+            "font-size": self.svg.unittouu(self.options.fontsize),
+            "fill-opacity": "1.0",
+            "stroke": "none",
+            "font-weight": "normal",
+            "font-style": "normal",
+            "fill": "#999",
+        }
+        return elem
+
+
+if __name__ == "__main__":
+    NumberNodes().run()