import Vue from 'vue';
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import { isString, isObject } from 'element-ui/src/utils/types';
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const hasOwnProperty = Object.prototype.hasOwnProperty;
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export function noop() {};
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export function hasOwn(obj, key) {
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return hasOwnProperty.call(obj, key);
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};
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function extend(to, _from) {
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for (let key in _from) {
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to[key] = _from[key];
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}
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return to;
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};
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export function toObject(arr) {
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var res = {};
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for (let i = 0; i < arr.length; i++) {
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if (arr[i]) {
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extend(res, arr[i]);
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}
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}
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return res;
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};
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export const getValueByPath = function(object, prop) {
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prop = prop || '';
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const paths = prop.split('.');
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let current = object;
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let result = null;
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for (let i = 0, j = paths.length; i < j; i++) {
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const path = paths[i];
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if (!current) break;
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if (i === j - 1) {
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result = current[path];
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break;
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}
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current = current[path];
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}
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return result;
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};
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export function getPropByPath(obj, path, strict) {
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let tempObj = obj;
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path = path.replace(/\[(\w+)\]/g, '.$1');
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path = path.replace(/^\./, '');
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let keyArr = path.split('.');
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let i = 0;
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for (let len = keyArr.length; i < len - 1; ++i) {
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if (!tempObj && !strict) break;
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let key = keyArr[i];
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if (key in tempObj) {
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tempObj = tempObj[key];
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} else {
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if (strict) {
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throw new Error('please transfer a valid prop path to form item!');
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}
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break;
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}
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}
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return {
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o: tempObj,
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k: keyArr[i],
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v: tempObj ? tempObj[keyArr[i]] : null
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};
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};
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export const generateId = function() {
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return Math.floor(Math.random() * 10000);
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};
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export const valueEquals = (a, b) => {
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// see: https://stackoverflow.com/questions/3115982/how-to-check-if-two-arrays-are-equal-with-javascript
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if (a === b) return true;
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if (!(a instanceof Array)) return false;
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if (!(b instanceof Array)) return false;
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if (a.length !== b.length) return false;
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for (let i = 0; i !== a.length; ++i) {
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if (a[i] !== b[i]) return false;
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}
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return true;
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};
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export const escapeRegexpString = (value = '') => String(value).replace(/[|\\{}()[\]^$+*?.]/g, '\\$&');
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// TODO: use native Array.find, Array.findIndex when IE support is dropped
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export const arrayFindIndex = function(arr, pred) {
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for (let i = 0; i !== arr.length; ++i) {
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if (pred(arr[i])) {
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return i;
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}
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}
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return -1;
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};
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export const arrayFind = function(arr, pred) {
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const idx = arrayFindIndex(arr, pred);
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return idx !== -1 ? arr[idx] : undefined;
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};
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// coerce truthy value to array
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export const coerceTruthyValueToArray = function(val) {
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if (Array.isArray(val)) {
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return val;
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} else if (val) {
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return [val];
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} else {
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return [];
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}
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};
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export const isIE = function() {
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return !Vue.prototype.$isServer && !isNaN(Number(document.documentMode));
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};
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export const isEdge = function() {
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return !Vue.prototype.$isServer && navigator.userAgent.indexOf('Edge') > -1;
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};
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export const isFirefox = function() {
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return !Vue.prototype.$isServer && !!window.navigator.userAgent.match(/firefox/i);
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};
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export const autoprefixer = function(style) {
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if (typeof style !== 'object') return style;
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const rules = ['transform', 'transition', 'animation'];
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const prefixes = ['ms-', 'webkit-'];
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rules.forEach(rule => {
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const value = style[rule];
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if (rule && value) {
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prefixes.forEach(prefix => {
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style[prefix + rule] = value;
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});
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}
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});
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return style;
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};
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export const kebabCase = function(str) {
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const hyphenateRE = /([^-])([A-Z])/g;
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return str
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.replace(hyphenateRE, '$1-$2')
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.replace(hyphenateRE, '$1-$2')
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.toLowerCase();
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};
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export const capitalize = function(str) {
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if (!isString(str)) return str;
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return str.charAt(0).toUpperCase() + str.slice(1);
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};
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export const looseEqual = function(a, b) {
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const isObjectA = isObject(a);
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const isObjectB = isObject(b);
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if (isObjectA && isObjectB) {
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return JSON.stringify(a) === JSON.stringify(b);
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} else if (!isObjectA && !isObjectB) {
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return String(a) === String(b);
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} else {
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return false;
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}
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};
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export const arrayEquals = function(arrayA, arrayB) {
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arrayA = arrayA || [];
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arrayB = arrayB || [];
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if (arrayA.length !== arrayB.length) {
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return false;
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}
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for (let i = 0; i < arrayA.length; i++) {
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if (!looseEqual(arrayA[i], arrayB[i])) {
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return false;
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}
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}
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return true;
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};
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export const isEqual = function(value1, value2) {
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if (Array.isArray(value1) && Array.isArray(value2)) {
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return arrayEquals(value1, value2);
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}
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return looseEqual(value1, value2);
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};
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export const isEmpty = function(val) {
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// null or undefined
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if (val == null) return true;
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if (typeof val === 'boolean') return false;
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if (typeof val === 'number') return !val;
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if (val instanceof Error) return val.message === '';
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switch (Object.prototype.toString.call(val)) {
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// String or Array
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case '[object String]':
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case '[object Array]':
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return !val.length;
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// Map or Set or File
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case '[object File]':
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case '[object Map]':
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case '[object Set]': {
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return !val.size;
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}
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// Plain Object
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case '[object Object]': {
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return !Object.keys(val).length;
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}
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}
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return false;
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};
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export function rafThrottle(fn) {
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let locked = false;
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return function(...args) {
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if (locked) return;
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locked = true;
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window.requestAnimationFrame(_ => {
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fn.apply(this, args);
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locked = false;
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});
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};
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}
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export function objToArray(obj) {
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if (Array.isArray(obj)) {
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return obj;
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}
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return isEmpty(obj) ? [] : [obj];
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}
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