Added VH To Line extension

extensions/fablabchemnitz_vh_to_line.inx

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+   <name>Convert Vertical/Horizontal To Line</name>
+   <id>fablabchemnitz.de.vh_to_line</id>
+   <effect>
+      <object-type>path</object-type>
+      <effects-menu>
+        <submenu name="FabLab Chemnitz">
+            <submenu name="Modify existing Path(s)"/>
+        </submenu>
+      </effects-menu>
+   </effect>
+   <script>
+      <command location="inx" interpreter="python">fablabchemnitz_vh_to_line.py</command>
+   </script>
+</inkscape-extension>

extensions/fablabchemnitz_vh_to_line.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+
+#M 60.403,71.0937 V 89.268022 135.773
+
+"""
+Extension for InkScape 1.X
+
+This extension converts an SVG path's d attribute the following way: find each V (vertical line) and each H (horizontal line) and replace it by a generic line (L type). 
+A lot of extensions do not work with V and H, but with L commands. So this is just a helper extension for other extensions :-)
+
+Example conversion:
+from: M 60.403,71.0937 V 89.268022 135.773
+to:   M 60.403 71.0937 L 60.403 89.268 L 60.403 135.773
+
+Author: Mario Voigt / FabLab Chemnitz
+Mail: mario.voigt@stadtfabrikanten.org
+Date: 23.08.2020
+Last patch: 23.08.2020
+License: GNU GPL v3
+"""
+
+from math import *
+import inkex
+from inkex.paths import Path, CubicSuperPath
+
+class VHToLine(inkex.Effect):
+    def __init__(self):
+        inkex.Effect.__init__(self)
+
+    def effect(self):
+        if len(self.svg.selected) == 0: exit("Please select at least one path.")
+        for obj in self.svg.selected: # The objects are the paths, which may be compound
+            curr = self.svg.selected[obj]
+            raw = Path(curr.get("d")).to_arrays()
+            subpaths, prev = [], 0
+            for i in range(len(raw)): # Breaks compound paths into simple paths
+                if raw[i][0] == 'M' and i != 0:
+                    subpaths.append(raw[prev:i])
+                    prev = i
+            subpaths.append(raw[prev:])
+			
+            seg = []
+            for simpath in subpaths:
+                closed = False
+                if simpath[-1][0] == 'Z':
+                    closed = True
+                    if simpath[-2][0] == 'L': simpath[-1][1] = simpath[0][1]
+                    else: simpath.pop()
+                for i in range(len(simpath)):
+                    if simpath[i][0] == 'V': # vertical and horizontal lines only have one point in args, but 2 are required
+                        #inkex.utils.debug(simpath[i][0])
+                        simpath[i][0]='L' #overwrite V with regular L command
+                        add=simpath[i-1][1][0] #read the X value from previous segment
+                        simpath[i][1].append(simpath[i][1][0]) #add the second (missing) argument by taking argument from previous segment
+                        simpath[i][1][0]=add #replace with recent X after Y was appended
+                    if simpath[i][0] == 'H': # vertical and horizontal lines only have one point in args, but 2 are required
+                        #inkex.utils.debug(simpath[i][0])
+                        simpath[i][0]='L' #overwrite H with regular L command
+                        simpath[i][1].append(simpath[i-1][1][1]) #add the second (missing) argument by taking argument from previous segment				
+                    #inkex.utils.debug(simpath[i])
+                    seg.append(simpath[i])
+            curr.set("d", Path(seg))
+			
+VHToLine().run()