jjb-lc-designable/shared/clone.js

基于alibaba-designable源码二次封装的表单设计器。

import { isFn } from './types';
import { instOf } from './instanceof';
const NATIVE_KEYS = [['Map', map => new Map(map)], ['WeakMap', map => new WeakMap(map)], ['WeakSet', set => new WeakSet(set)], ['Set', set => new Set(set)], ['Date', date => new Date(date)], 'FileList', 'File', 'URL', 'RegExp', ['Promise', promise => new Promise((resolve, reject) => promise.then(resolve, reject))]];
const isNativeObject = values => {
  for (let i = 0; i < NATIVE_KEYS.length; i++) {
    const item = NATIVE_KEYS[i];
    if (Array.isArray(item) && item[0]) {
      if (instOf(values, item[0])) {
        return item[1] ? item[1] : item[0];
      }
    } else {
      if (instOf(values, item)) {
        return item;
      }
    }
  }
};
export const shallowClone = values => {
  let nativeClone;
  if (Array.isArray(values)) {
    return values.slice(0);
  } else if (isNativeObject(values)) {
    nativeClone = isNativeObject(values);
    return isFn(nativeClone) ? nativeClone(values) : values;
  } else if (typeof values === 'object' && !!values) {
    return {
      ...values
    };
  }
};
export const clone = (values, filter) => {
  let nativeClone;
  if (Array.isArray(values)) {
    return values.map(item => clone(item, filter));
  } else if (isNativeObject(values)) {
    nativeClone = isNativeObject(values);
    return isFn(nativeClone) ? nativeClone(values) : values;
  } else if (typeof values === 'object' && !!values) {
    if ('$$typeof' in values && '_owner' in values) {
      return values;
    }
    if (values._isAMomentObject) {
      return values;
    }
    if (values._isJSONSchemaObject) {
      return values;
    }
    if (isFn(values.toJS)) {
      return values;
    }
    if (isFn(values.toJSON)) {
      return values;
    }
    if (Object.getOwnPropertySymbols(values || {}).length) {
      return values;
    }
    const res = {};
    for (const key in values) {
      if (Object.hasOwnProperty.call(values, key)) {
        if (isFn(filter)) {
          if (filter(values[key], key)) {
            res[key] = clone(values[key], filter);
          } else {
            res[key] = values[key];
          }
        } else {
          res[key] = clone(values[key], filter);
        }
      }
    }
    return res;
  } else {
    return values;
  }
};