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diff --git a/share/extensions/merge_styles.py b/share/extensions/merge_styles.py
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+#!/usr/bin/env python
+# coding=utf-8
+#
+# Copyright (C) 2014-2019 Martin Owens
+#
+# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+"""
+Merges styles into class based styles and removes.
+"""
+
+import inkex
+from inkex.localization import inkex_gettext as _
+
+
+class MergeStyles(inkex.EffectExtension):
+ """Merge any styles which are the same for CSS"""
+
+ def add_arguments(self, pars):
+ self.arg_parser.add_argument(
+ "-n",
+ "--name",
+ type=str,
+ dest="name",
+ help="Name of selected element's common class",
+ )
+
+ def effect(self):
+ """Apply the style effect"""
+ newclass = self.options.name
+ if not newclass:
+ newclass = self.svg.get_unique_id("css")
+
+ elements = self.svg.selection.values()
+ common = None
+
+ for elem in elements:
+ style = set(elem.style.items())
+ if common is not None:
+ common &= style
+ else:
+ common = style
+
+ if not common:
+ return inkex.errormsg(
+ _("There are no common styles between these elements.")
+ )
+
+ self.svg.stylesheet.add("." + newclass, inkex.Style(sorted(common)))
+
+ for elem in elements:
+ elem.style -= dict(common).keys()
+ elem.classes.append(newclass)
+ return True
+
+
+if __name__ == "__main__":
+ MergeStyles().run()