From 80a28a8d5964d2b95fca5b74d1be5e2879c91426 Mon Sep 17 00:00:00 2001
From: Mario Voigt <mario.voigt@stadtfabrikanten.org>
Date: Thu, 3 Sep 2020 00:16:04 +0200
Subject: [PATCH] Added Filter to Layer

---
 extensions/fablabchemnitz/filter_layer.inx | 21 ++++++
 extensions/fablabchemnitz/filter_layer.py  | 85 ++++++++++++++++++++++
 2 files changed, 106 insertions(+)
 create mode 100644 extensions/fablabchemnitz/filter_layer.inx
 create mode 100644 extensions/fablabchemnitz/filter_layer.py

diff --git a/extensions/fablabchemnitz/filter_layer.inx b/extensions/fablabchemnitz/filter_layer.inx
new file mode 100644
index 00000000..94b21d91
--- /dev/null
+++ b/extensions/fablabchemnitz/filter_layer.inx
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+    <name>Filter To Layer</name>
+    <id>fablabchemnitz.de.filter_layer</id>
+    <param name="type" type="optiongroup" gui-text="Filter to current layer:">
+        <option>Add</option>
+        <option>Remove</option>
+    </param>
+    <param name="help-info" type="description">Filter from selected item: Apply only for the future draws and for selected item. Problem: you can't add more live effects to elements.</param>
+    <effect needs-document="no">
+        <object-type>all</object-type>
+        <effects-menu>
+            <submenu name="FabLab Chemnitz">
+                <submenu name="Groups and Layers"/>
+            </submenu>
+        </effects-menu>
+    </effect>
+    <script>
+        <command location="inx" interpreter="python">filter_layer.py</command>
+    </script>
+</inkscape-extension>
\ No newline at end of file
diff --git a/extensions/fablabchemnitz/filter_layer.py b/extensions/fablabchemnitz/filter_layer.py
new file mode 100644
index 00000000..d1a62eb2
--- /dev/null
+++ b/extensions/fablabchemnitz/filter_layer.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python3
+'''
+This extension adds or removes filters to current layer
+
+Copyright (C) 2012 Jabiertxo Arraiza, jabier.arraiza@marker.es
+
+Version 0.3
+
+TODO:
+Comment Better!!!
+
+CHANGE LOG 
+0.1 Start  30/07/2012
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+'''
+
+import inkex
+import sys
+import re
+
+class FilterAndLiveEffectsLayer(inkex.Effect):
+
+    def __init__(self):
+        inkex.Effect.__init__(self)
+        self.arg_parser.add_argument('--type', default = 'Add', help = 'Add or remove filters to current layer')
+    
+    def selectTop(self):
+        selected = []
+        selectedSorted = None
+        if self.svg.selected is not None:
+            for id, node in self.svg.selected.items():
+                selected.append(id)
+            for node in self.document.getroot().iter():
+                idNode = node.get("id")
+                if idNode in selected:
+                    selectedSorted = node
+        return selectedSorted
+
+    def effect(self):
+        svg = self.document.getroot()
+        typeOperation = self.options.type
+        xpathStr = '//sodipodi:namedview'
+        namedview = svg.xpath(xpathStr, namespaces=inkex.NSS)
+        idLayer = namedview[0].get('{http://www.inkscape.org/namespaces/inkscape}current-layer');
+        xpathStr = '//svg:g[@id="'+idLayer+'"]'
+        layer = svg.xpath(xpathStr, namespaces=inkex.NSS)
+        if typeOperation == "Add":
+            element = self.selectTop()
+            if element is not None:
+                if element.get('style'):
+                    matchObj = re.search( r'filter:url\(#.*?[^\)]\)', element.get('style'), re.M|re.I)
+                    if matchObj:
+                        filter = matchObj.group()
+                        element.set('style',element.get('style').replace(filter,"").replace(";;",";"))
+                        if layer[0].get('style'):
+                            matchObj = re.search( r'filter:url\(#.*?[^\)]\)', layer[0].get('style'), re.M|re.I)
+                            if matchObj:
+                                element.set('style',element.get('style').replace(matchObj.group(),"").replace(";;",";"))
+                            style = layer[0].get('style')+ ";" + filter;
+                            layer[0].set('style',style.replace(";;",";"))
+                        else:
+                            layer[0].set('style',filter)
+            else:
+                inkex.utils.debug("Nothing selected")
+        else: #Remove action
+            if layer[0].get('style'):
+                matchObj = re.search( r'filter:url\(#.*?[^\)]\)', layer[0].get('style'), re.M|re.I)
+                if matchObj:
+                    layer[0].set('style',layer[0].get('style').replace(matchObj.group(),"").replace(";;",";"))
+
+if __name__ == '__main__':    
+    FilterAndLiveEffectsLayer().run()
\ No newline at end of file