1 files changed, 91 insertions, 0 deletions
diff --git a/share/extensions/restack.py b/share/extensions/restack.py
new file mode 100755
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+++ b/share/extensions/restack.py
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+#!/usr/bin/env python
+#
+# Copyright (C) 2007-2011 Rob Antonishen; rob.antonishen@gmail.com
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+
+import random
+
+import inkex
+from inkex.utils import KeyDict
+from inkex import SvgDocumentElement
+
+# Old settings, supported because users click 'ok' without looking.
+XAN = KeyDict({'l': 'left', 'r': 'right', 'm': 'center_x'})
+YAN = KeyDict({'t': 'top', 'b': 'bottom', 'm': 'center_y'})
+CUSTOM_DIRECTION = {270: 'tb', 90: 'bt', 0: 'lr', 360: 'lr', 180: 'rl'}
+
+class Restack(inkex.EffectExtension):
+    """Change the z-order of objects based on their position on the canvas"""
+    restack_help = staticmethod(lambda: None)
+
+    def add_arguments(self, pars):
+        pars.add_argument("--tab", type=self.arg_method('restack'), default=self.restack_positional)
+        pars.add_argument("--direction", default="tb", help="direction to restack")
+        pars.add_argument("--angle", type=float, default=0.0, help="arbitrary angle")
+        pars.add_argument("--xanchor", default="m", help="horizontal point to compare")
+        pars.add_argument("--yanchor", default="m", help="vertical point to compare")
+        pars.add_argument("--zsort", default="rev", help="Restack mode based on Z-Order")
+        pars.add_argument("--nb_direction", default='', help='Direction tab')
+
+    def effect(self):
+        if not self.svg.selected:
+            raise inkex.AbortExtension("There is no selection to restack.")
+
+        # process selection to get list of objects to be arranged
+        parentnode = None
+        for node in self.svg.selection.filter(SvgDocumentElement):
+            parentnode = node
+            self.svg.set_selection(*list(node))
+
+        if parentnode is None:
+            parentnode = self.svg.get_current_layer()
+
+        self.options.tab(parentnode)
+
+    def restack_positional(self, parentnode):
+        """Restack based on canvas position"""
+        # move them to the top of the object stack in this order.
+        for node in sorted(self.svg.selected.values(), key=self._sort):
+            parentnode.append(node)
+        return True
+
+    def _sort(self, node):
+        x, y = self.options.xanchor, self.options.yanchor
+        selbox = self.svg.selection.bounding_box()
+        direction = self.options.direction
+        if 'custom' in self.options.nb_direction:
+            direction = self.options.angle
+        return node.bounding_box().get_anchor(x, y, direction, selbox)
+
+    def restack_z_order(self, parentnode):
+        """Restack based on z-order"""
+        objects = list(self.svg.selected.values())
+        if self.options.zsort == "rev":
+            objects.reverse()
+        elif self.options.zsort == "rand":
+            random.shuffle(objects)
+        if parentnode is not None:
+            for item in objects:
+                parentnode.append(item)
+        return True
+
+if __name__ == '__main__':
+    Restack().run()