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/*
* Copyright (C) 2022 Niels De Graef <nielsdegraef@gmail.com>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
using Folks;
/**
* A custom GtkFilter to filter {@link Chunk}s on a given property.
*/
public class Contacts.ChunkPropertyFilter : Gtk.Filter {
/** If not empty, only the properties in the string list will match */
public Gtk.StringList allowed_properties {
get { return this._allowed_properties; }
construct set {
this._allowed_properties = value;
value.items_changed.connect ((list, pos, removed, added) => {
if ((added > 0 && removed == 0) || list.get_n_items () == 0)
changed (Gtk.FilterChange.LESS_STRICT);
else if (added == 0 && removed > 0)
changed (Gtk.FilterChange.MORE_STRICT);
else
changed (Gtk.FilterChange.DIFFERENT);
});
}
}
private Gtk.StringList _allowed_properties = null;
/**
* Creates a ChunkPropertyFilter for a specific property
*/
public ChunkPropertyFilter (string[] properties) {
Object (allowed_properties: new Gtk.StringList (properties));
}
/**
* Creates a ChunkPropertyFilter for a specific property
*/
public ChunkPropertyFilter.for_single (string property_name) {
Object (allowed_properties: new Gtk.StringList ({ property_name }));
}
public override bool match (GLib.Object? item) {
unowned var chunk = (Chunk) item;
return match_property_name (chunk);
}
private bool match_property_name (Chunk chunk) {
if (this.allowed_properties.get_n_items () == 0)
return true;
for (uint i = 0; i < this.allowed_properties.get_n_items (); i++) {
if (chunk.property_name == this.allowed_properties.get_string (i))
return true;
}
return false;
}
public override Gtk.FilterMatch get_strictness () {
if (this.allowed_properties.get_n_items () == 0)
return Gtk.FilterMatch.ALL;
return Gtk.FilterMatch.SOME;
}
}
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