@antv/g2plot
Version:
An interactive and responsive charting library
89 lines • 2.78 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.deepAssign = void 0;
var MAX_MIX_LEVEL = 5; // 最大比对层级
var toString = {}.toString;
// 类型检测
var isType = function (value, type) { return toString.call(value) === '[object ' + type + ']'; };
var isArray = function (value) {
return isType(value, 'Array');
};
var isObjectLike = function (value) {
/**
* isObjectLike({}) => true
* isObjectLike([1, 2, 3]) => true
* isObjectLike(Function) => false
*/
return typeof value === 'object' && value !== null;
};
var isPlainObject = function (value) {
/**
* isObjectLike(new Foo) => false
* isObjectLike([1, 2, 3]) => false
* isObjectLike({ x: 0, y: 0 }) => true
*/
if (!isObjectLike(value) || !isType(value, 'Object')) {
return false;
}
var proto = value;
while (Object.getPrototypeOf(proto) !== null) {
proto = Object.getPrototypeOf(proto);
}
return Object.getPrototypeOf(value) === proto;
};
/***
* @param {any} dist
* @param {any} src
* @param {number} level 当前层级
* @param {number} maxLevel 最大层级
*/
var deep = function (dist, src, level, maxLevel) {
level = level || 0;
maxLevel = maxLevel || MAX_MIX_LEVEL;
for (var key in src) {
if (Object.prototype.hasOwnProperty.call(src, key)) {
var value = src[key];
if (!value) {
// null 、 undefined 等情况直接赋值
dist[key] = value;
}
else {
if (isPlainObject(value)) {
if (!isPlainObject(dist[key])) {
dist[key] = {};
}
if (level < maxLevel) {
deep(dist[key], value, level + 1, maxLevel);
}
else {
// 层级过深直接赋值，性能问题
dist[key] = src[key];
}
}
else if (isArray(value)) {
dist[key] = [];
dist[key] = dist[key].concat(value);
}
else {
dist[key] = value;
}
}
}
}
};
/**
* deepAssign 功能类似 deepMix
* 不同点在于 deepAssign 会将 null undefined 等类型直接覆盖给 source
* 详细参考： __tests__/unit/utils/deep-assign-spec.ts
*/
exports.deepAssign = function (rst) {
var args = [];
for (var _i = 1; _i < arguments.length; _i++) {
args[_i - 1] = arguments[_i];
}
for (var i = 0; i < args.length; i += 1) {
deep(rst, args[i]);
}
return rst;
};
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