69 lines
1.8 KiB
TypeScript
69 lines
1.8 KiB
TypeScript
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import { useSyncExternalStore } from 'react';
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type Listener = () => void;
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export type AppearanceChromeSnapshot = {
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accentMode: 'theme' | 'custom';
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customAccent: string;
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};
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const DEFAULT_SNAPSHOT: AppearanceChromeSnapshot = Object.freeze({
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accentMode: 'theme',
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customAccent: '',
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});
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/**
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* External store for app accent chrome so Terminal leaves can apply custom
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* accent without TerminalLayer rebuilding on every color-picker drag tick.
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*/
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class AppearanceChromeStore {
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private snapshot: AppearanceChromeSnapshot = DEFAULT_SNAPSHOT;
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private listeners = new Set<Listener>();
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getSnapshot = (): AppearanceChromeSnapshot => this.snapshot;
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subscribe = (listener: Listener): (() => void) => {
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this.listeners.add(listener);
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return () => {
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this.listeners.delete(listener);
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};
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};
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setSnapshot(next: AppearanceChromeSnapshot): void {
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if (
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this.snapshot.accentMode === next.accentMode
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&& this.snapshot.customAccent === next.customAccent
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) {
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return;
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}
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this.snapshot = next;
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for (const listener of this.listeners) {
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listener();
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}
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}
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}
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export const appearanceChromeStore = new AppearanceChromeStore();
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export function publishAppearanceChromeSnapshot(
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snapshot: AppearanceChromeSnapshot,
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): void {
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appearanceChromeStore.setSnapshot(snapshot);
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}
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export function getAppearanceChromeSnapshot(): AppearanceChromeSnapshot {
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return appearanceChromeStore.getSnapshot();
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}
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export function subscribeAppearanceChrome(listener: Listener): () => void {
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return appearanceChromeStore.subscribe(listener);
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}
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export function useAppearanceChromeStore(): AppearanceChromeSnapshot {
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return useSyncExternalStore(
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subscribeAppearanceChrome,
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getAppearanceChromeSnapshot,
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getAppearanceChromeSnapshot,
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);
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}
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