69 lines
1.8 KiB
Svelte
69 lines
1.8 KiB
Svelte
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<!--
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Copyright: Ankitects Pty Ltd and contributors
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License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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-->
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<script lang="typescript" context="module">
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import { writable } from "svelte/store";
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type T = unknown;
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type UpdaterMap = Map<string, (event: Event) => T>;
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type StateMap = Map<string, T>;
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const updaterMap = new Map() as UpdaterMap;
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const stateMap = new Map() as StateMap;
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const stateStore = writable(stateMap);
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function updateAllStateWithCallback(callback: (key: string) => T): void {
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stateStore.update(
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(map: StateMap): StateMap => {
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const newMap = new Map() as StateMap;
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for (const key of map.keys()) {
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newMap.set(key, callback(key));
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}
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return newMap;
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}
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);
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}
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export function updateAllState(event: Event): void {
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updateAllStateWithCallback((key: string): T => updaterMap.get(key)(event));
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}
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export function resetAllState(state: T): void {
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updateAllStateWithCallback((): T => state);
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}
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function updateStateByKey(key: string, event: MouseEvent): void {
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stateStore.update(
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(map: StateMap): StateMap => {
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map.set(key, updaterMap.get(key)(event));
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return map;
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}
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);
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}
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</script>
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<script lang="typescript">
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export let key: string;
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export let update: (event: Event) => T;
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export let state: T;
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updaterMap.set(key, update);
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stateStore.subscribe((map: StateMap): (() => void) => {
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state = Boolean(map.get(key));
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return () => map.delete(key);
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});
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stateMap.set(key, state);
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function updateState(event: Event): void {
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updateStateByKey(key, event);
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}
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</script>
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<slot {state} {updateState} />
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