Added back several extensions

extensions/fablabchemnitz/delete_above/delete_above.inx

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+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+  <name>Delete Above</name>
+  <id>fablabchemnitz.de.delete_above</id>
+  <effect>
+    <object-type>all</object-type>
+      <effects-menu>
+        <submenu name="FabLab Chemnitz">
+            <submenu name="Various"/>
+        </submenu>
+      </effects-menu>
+  </effect>
+  <script>
+    <command location="inx" interpreter="python">delete_above.py</command>
+  </script>
+</inkscape-extension>

extensions/fablabchemnitz/delete_above/delete_above.py

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+#!/usr/bin/env python3
+"""
+Inkscape plugin: delete the selected object(s) and any objects on top of them.
+
+I.E. delete the selected node(s) and any other nodes that are completely
+within the bounding-boxes of the selected nodes that have a greater z-order
+
+Simply put, you select a "background" rectangle, then use this plugin to
+delete it and everything that appears on top of it.
+"""
+
+import collections
+import subprocess
+import os
+import pprint
+import inkex
+
+Point = collections.namedtuple('Point', ['x', 'y'])
+
+Box = collections.namedtuple('Box', ['tl', 'tr', 'br', 'bl'])
+# tl=top left, tr=top right, br=bottom right, bl=bottom left
+
+nodeInfo = collections.namedtuple('nodeInfo',
+                                     ['x', 'y', 'width', 'height'])
+
+
+def contains(outer, inner):
+    """ Return true if the Box inner is completely within the Box outer """
+    return inner.tl.x >= outer.tl.x and inner.tl.y >= outer.tl.y and \
+           inner.br.x <= outer.br.x and inner.br.y <= outer.br.y
+
+
+class DeleteAbove(inkex.EffectExtension):
+    """ Delete the selected node and everything above it """
+    node_info = None
+
+    def load_node_info(self):
+        """ Ask inkscape for information about all object bounding boxes """
+        node_info = dict()
+        command = ['inkscape', '--query-all', self.options.input_file]
+        check_output = subprocess.check_output
+
+        with open(os.devnull, 'w') as null:
+            for line in check_output(command, stderr=null).splitlines():
+                raw_id, raw_x, raw_y, raw_width, raw_height = line.split(b',')
+                node_info[raw_id.decode("UTF-8")] = nodeInfo(float(raw_x),
+                                                   float(raw_y),
+                                                   float(raw_width),
+                                                   float(raw_height))
+
+        self.node_info = node_info
+        return
+
+    def remove(self, node):
+        """ Remove the specified node from the document tree """
+        parent = node.getparent()
+        if parent is None:
+            return
+        parent.remove(node)
+
+    def bbox(self, node):
+        """ Return the bounding-box of the given node """
+        node_id = node.get('id')
+        #inkex.utils.debug("Check if " + str(node_id) + " is in " + str(self.node_info))
+        info = self.node_info[node_id]           
+        
+        x = info.x
+        y = info.y
+        width = info.width
+        height = info.height
+
+        return Box(Point(x, y),
+                   Point(x + width, y),
+                   Point(x + width, y + height),
+                   Point(x, y + height))
+
+    def effect(self):
+        """
+        For every selected node, remove it and all items on top of it
+        """
+        self.load_node_info()
+        nodes_to_remove = list()
+
+        for id, node in self.svg.selected.items():
+            selected_node_bbox = self.bbox(node)
+            nodes_to_remove.append(node)
+
+            # search the document tree for the selected node
+            # when found, every subsequent node will be "above" it.
+            # (i.e. svg documents draw from the background up, so a background
+            # node will appear first, then nodes that are progressively
+            # closer to the viewer will appear subsequently in the svg file)
+            found_selected_node = False
+            for node in self.document.getiterator():
+                if not found_selected_node:
+                    if node == node:
+                        found_selected_node = True
+                    continue
+                # Hereafter we are iterating over all nodes above the
+                # selected node. We need to delete them if they appear to
+                # be "on top of" the selection (i.e. within the bounding box
+                # of the selection)
+                try:
+                    node_bbox = self.bbox(node)
+                except KeyError:
+                    continue
+                if contains(selected_node_bbox, node_bbox):
+                    nodes_to_remove.append(node)
+
+        # Now we remove the items we've previously found. Search and remove
+        # need to be separate bulk steps because tree search is disrupted by
+        # tree modification
+        for condemned_node in set(nodes_to_remove):
+            self.remove(condemned_node)
+
+if __name__ == '__main__':
+    if False:
+        # Some tools for debug use
+        PPRINTER = pprint.PrettyPrinter(indent=4)
+        FMT = PPRINTER.pformat
+        DUMP = lambda obj: inkex.debug(FMT(obj))
+
+    DeleteAbove().run()

extensions/fablabchemnitz/delete_above/meta.json

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+[
+  {
+    "name": "Delete Above",
+    "id": "fablabchemnitz.de.delete_above",
+    "path": "delete_above",
+    "dependent_extensions": null,
+    "original_name": "Delete Above",
+    "original_id": "com.galvanist.sw.plugins.deleteabove",
+    "license": "BSD-3-Clause License",
+    "license_url": "https://github.com/glvnst/cruft/blob/master/delete_above/LICENSE.txt",
+    "comment": "",
+    "source_url": "https://gitea.fablabchemnitz.de/FabLab_Chemnitz/mightyscape-1.2/src/branch/master/extensions/fablabchemnitz/delete_above",
+    "fork_url": "https://github.com/glvnst/cruft/tree/master/delete_above",
+    "documentation_url": "https://stadtfabrikanten.org/display/IFM/Delete+Above",
+    "inkscape_gallery_url": null,
+    "main_authors": [
+      "github.com/glvnst",
+      "github.com/eridur-de"
+    ]
+  }
+]