--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libervia/frontends/quick_frontend/quick_list_manager.py	Fri Jun 02 14:12:38 2023 +0200
@@ -0,0 +1,72 @@
+#!/usr/bin/env python3
+
+
+# Libervia: a Salut à Toi frontend
+# Copyright (C) 2013-2016 Adrien Cossa <souliane@mailoo.org>
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+class QuickTagList(object):
+    """This class manages a sorted list of tagged items, and a complementary sorted list of suggested but non tagged items."""
+
+    def __init__(self, items=None):
+        """
+
+        @param items (list): the suggested list of non tagged items
+        """
+        self.tagged = []
+        self.original = (
+            items[:] if items else []
+        )  # XXX: copy the list! It will be modified
+        self.untagged = (
+            items[:] if items else []
+        )  # XXX: copy the list! It will be modified
+        self.untagged.sort()
+
+    @property
+    def items(self):
+        """Return a sorted list of all items, tagged or untagged.
+        
+        @return list
+        """
+        res = list(set(self.tagged).union(self.untagged))
+        res.sort()
+        return res
+
+    def tag(self, items):
+        """Tag some items.
+
+        @param items (list): items to be tagged
+        """
+        for item in items:
+            if item not in self.tagged:
+                self.tagged.append(item)
+            if item in self.untagged:
+                self.untagged.remove(item)
+        self.tagged.sort()
+        self.untagged.sort()
+
+    def untag(self, items):
+        """Untag some items.
+  
+        @param items (list): items to be untagged
+        """
+        for item in items:
+            if item not in self.untagged and item in self.original:
+                self.untagged.append(item)
+            if item in self.tagged:
+                self.tagged.remove(item)
+        self.tagged.sort()
+        self.untagged.sort()