Added bbox adjust extension

extensions/fablabchemnitz/epilog_bbox_adjust.inx

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+	<_name>Epilog Dashboard BBox Adjust</_name>
+	<id>fablabchemnitz.de.epilog_bbox_adjust</id>
+	<effect needs-document="true" needs-live-preview="false">
+		<menu-tip>Widen the document to send all lines properly to Epilog Dashboard (adds 1.0 doc units of extra offset)</menu-tip>
+		<object-type>all</object-type>
+		<effects-menu>
+            <submenu name="FabLab Chemnitz">
+				<submenu name="Various">
+            </submenu>
+		</effects-menu>
+	</effect>
+	<script>
+		<command reldir="inx" interpreter="python">epilog_bbox_adjust.py</command>
+	</script>
+</inkscape-extension>

extensions/fablabchemnitz/epilog_bbox_adjust.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+
+'''
+This tool is a helper to adjust the document border including an offset value, which is added. 
+Sending vector data to Epilog Dashboard often results in trimmed paths. This leads to wrong geometry where the laser misses to cut them.
+So we add a default (small) amount of 0.05 doc units to expand the document's canvas
+'''
+
+import inkex
+from inkex import Transform
+
+class BBoxAdjust(inkex.EffectExtension):
+
+    def effect(self):
+        offset = 1.0 #in documents' units
+
+        # create a new bounding box and get the bbox size of all elements of the document (we cannot use the page's bbox)
+        bbox = inkex.BoundingBox()
+        for element in self.svg.root.getchildren():
+            if isinstance (element, inkex.ShapeElement):
+                bbox += element.bounding_box()
+
+        # adjust the viewBox to the bbox size and add the desired offset
+        self.document.getroot().attrib['viewBox'] = f'{-offset} {-offset} {bbox.width + offset * 2} {bbox.height + offset * 2}'
+        self.document.getroot().attrib['width'] = f'{bbox.width + offset * 2}' + self.svg.unit
+        self.document.getroot().attrib['height'] = f'{bbox.height + offset * 2}' + self.svg.unit
+
+        # translate all elements to fit the adjusted viewBox
+        mat = Transform("translate(%f, %f)" % (-bbox.left,-bbox.top)).matrix
+        for element in self.svg.root.getchildren():
+            if isinstance (element, inkex.ShapeElement):
+                element.transform = Transform(mat) * element.transform
+
+if __name__ == '__main__':
+    BBoxAdjust().run()