mirror of https://github.com/procxx/kepka.git
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
//
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// This file is part of Kepka,
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// an unofficial desktop version of Telegram messaging app,
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// see https://github.com/procxx/kepka
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//
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// Kepka is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// It is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// In addition, as a special exception, the copyright holders give permission
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// to link the code of portions of this program with the OpenSSL library.
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//
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// Full license: https://github.com/procxx/kepka/blob/master/LICENSE
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// Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
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// Copyright (c) 2017- Kepka Contributors, https://github.com/procxx
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//
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#pragma once
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namespace Data {
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template <
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typename FlagsType,
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typename FlagsType::Type kEssential = -1>
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class Flags {
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public:
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struct Change {
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Change(FlagsType diff, FlagsType value)
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: diff(diff)
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, value(value) {
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}
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FlagsType diff = 0;
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FlagsType value = 0;
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};
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Flags() = default;
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Flags(FlagsType value) : _value(value) {
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}
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void set(FlagsType which) {
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if (auto diff = which ^ _value) {
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_value = which;
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updated(diff);
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}
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}
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void add(FlagsType which) {
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if (auto diff = which & ~_value) {
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_value |= which;
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updated(diff);
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}
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}
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void remove(FlagsType which) {
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if (auto diff = which & _value) {
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_value &= ~which;
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updated(diff);
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}
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}
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FlagsType current() const {
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return _value;
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}
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// rpl::producer<Change> changes() const {
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// return _changes.events();
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// }
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// rpl::producer<Change> value() const {
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// return _changes.events_starting_with({
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// FlagsType::from_raw(kEssential),
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// _value });
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// }
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private:
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void updated(FlagsType diff) {
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if ((diff &= FlagsType::from_raw(kEssential))) {
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_changes.fire({ diff, _value });
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}
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}
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FlagsType _value = 0;
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//rpl::event_stream<Change> _changes;
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};
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} // namespace Data
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