misskey/packages/frontend/src/scripts/merge.ts
かっこかり 16eccad492
enhance(frontend): シンタックスハイライトにテーマを適用できるように (#13175)
* enhance(frontend): シンタックスハイライトにテーマを適用できるように

* Update Changelog

* こっちも

* テーマの値がディープマージされるように

* 常にテーマ設定に準じるように

* テーマ更新時に新しいshikiテーマを読み込むように
2024-02-06 15:03:07 +09:00

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/*
* SPDX-FileCopyrightText: syuilo and other misskey contributors
* SPDX-License-Identifier: AGPL-3.0-only
*/
import { deepClone } from './clone.js';
import type { Cloneable } from './clone.js';
function isPureObject(value: unknown): value is Record<string | number | symbol, unknown> {
return typeof value === 'object' && value !== null && !Array.isArray(value);
}
/**
* valueにないキーをdefからもらう再帰的\
* nullはそのまま、undefinedはdefの値
**/
export function deepMerge<X extends Record<string | number | symbol, unknown>>(value: X, def: X): X {
if (isPureObject(value) && isPureObject(def)) {
const result = deepClone(value as Cloneable) as X;
for (const [k, v] of Object.entries(def) as [keyof X, X[keyof X]][]) {
if (!Object.prototype.hasOwnProperty.call(value, k) || value[k] === undefined) {
result[k] = v;
} else if (isPureObject(v) && isPureObject(result[k])) {
const child = deepClone(result[k] as Cloneable) as X[keyof X] & Record<string | number | symbol, unknown>;
result[k] = deepMerge<typeof v>(child, v);
}
}
return result;
}
return value;
}