45 lines
1.2 KiB
TypeScript
45 lines
1.2 KiB
TypeScript
/*
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This file is part of TALER
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(C) 2016 Inria
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* General helper components
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*
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* @author Florian Dold
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*/
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export interface StateHolder<T> {
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(): T;
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(newState: T): void;
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}
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/**
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* Component that doesn't hold its state in one object,
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* but has multiple state holders.
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*/
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export abstract class ImplicitStateComponent<PropType> extends React.Component<PropType, any> {
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makeState<StateType>(initial: StateType): StateHolder<StateType> {
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let state: StateType = initial;
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return (s?: StateType): StateType => {
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if (s !== undefined) {
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state = s;
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this.setState({} as any);
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}
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return state;
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};
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}
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}
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