small enhancement in invetory sticker, added quick svg reload extension

extensions/fablabchemnitz/inventory_sticker/inventory_sticker.py

@@ -397,15 +397,9 @@ class InventorySticker(inkex.Effect):
         root.set("viewBox", "%f %f %f %f" % (0, 0, sticker_width, sticker_height))
 
         #clean the document (make it blank) to avoid printing duplicated things
-        ct = 0
         for node in self.document.xpath('//*', namespaces=inkex.NSS):
-            ct = ct + 1
-            if ct > 3: #we keep svg:svg, sodipodi:namedview and svg:defs which defines the default canvas without any content inside
-                #inkex.errormsg(str(node))
-                try:
-                    root.remove(node)
-                except Exception as e:
-                    pass
+            if node.TAG not in ('svg', 'defs', 'namedview'):
+                node.delete()
             
         #set the document units
         self.document.getroot().find(inkex.addNS("namedview", "sodipodi")).set("inkscape:document-units", "px")

extensions/fablabchemnitz/reload/reload.inx

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+	<name>Reload drawing</name>
+	<id>fablabchemnitz.de.reload</id>
+	<effect needs-document="true" needs-live-preview="false">
+		<object-type>all</object-type>
+		<effects-menu>
+            <submenu name="FabLab Chemnitz"/>
+		</effects-menu>
+	</effect>
+	<script>
+		<command location="inx" interpreter="python">reload.py</command>
+	</script>
+</inkscape-extension>

extensions/fablabchemnitz/reload/reload.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+
+import inkex
+from lxml import etree
+
+class Reload(inkex.EffectExtension):
+
+    def effect(self):
+        currentDoc = self.document_path()
+        if currentDoc == "":
+            self.msg("Your document is not saved as a permanent file yet. Cannot reload.")
+            exit(1)
+        stream = open(self.document_path(), 'r')
+        p = etree.XMLParser(huge_tree=True)
+        doc = etree.parse(stream, parser=etree.XMLParser(huge_tree=True))
+        stream.close()
+        root = self.document.getroot()
+        kept = [] #required. if we delete them directly without adding new defs or namedview, inkscape will crash
+        for node in self.document.xpath('//*', namespaces=inkex.NSS):
+            if node.TAG not in ('svg', 'defs', 'namedview'):
+                node.delete()
+            elif node.TAG in ('defs', 'namedview'): #except 'svg'
+                kept.append(node)
+        
+        children = doc.getroot().getchildren()
+        for child in children:
+           root.append(child)
+        for k in kept:
+            k.delete()
+    
+if __name__ == '__main__':
+    Reload().run()