1/*
2state.mjs - <short description TODO>
3Copyright (C) 2022 Strudel contributors - see <https://codeberg.org/uzu/strudel/src/branch/main/packages/core/state.mjs>
4This 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 <https://www.gnu.org/licenses/>.
5*/
6
7export class State {
8  constructor(span, controls = {}) {
9    this.span = span;
10    this.controls = controls;
11  }
12
13  // Returns new State with different span
14  setSpan(span) {
15    return new State(span, this.controls);
16  }
17
18  withSpan(func) {
19    return this.setSpan(func(this.span));
20  }
21
22  // Returns new State with added controls.
23  setControls(controls) {
24    return new State(this.span, { ...this.controls, ...controls });
25  }
26}
27
28export default State;