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Direktori : /home/opti/workflow/src/public/app-assets/vendors/js/charts/echarts/zrender/core/ |
Current File : /home/opti/workflow/src/public/app-assets/vendors/js/charts/echarts/zrender/core/util.js |
/** * @module zrender/core/util */ define(function(require) { var Gradient = require('../graphic/Gradient'); // 用于处理merge时无法遍历Date等对象的问题 var BUILTIN_OBJECT = { '[object Function]': 1, '[object RegExp]': 1, '[object Date]': 1, '[object Error]': 1, '[object CanvasGradient]': 1 }; var objToString = Object.prototype.toString; var arrayProto = Array.prototype; var nativeForEach = arrayProto.forEach; var nativeFilter = arrayProto.filter; var nativeSlice = arrayProto.slice; var nativeMap = arrayProto.map; var nativeReduce = arrayProto.reduce; /** * @param {*} source * @return {*} 拷贝后的新对象 */ function clone(source) { if (typeof source == 'object' && source !== null) { var result = source; if (source instanceof Array) { result = []; for (var i = 0, len = source.length; i < len; i++) { result[i] = clone(source[i]); } } else if ( !isBuildInObject(source) // 是否为 dom 对象 && !isDom(source) ) { result = {}; for (var key in source) { if (source.hasOwnProperty(key)) { result[key] = clone(source[key]); } } } return result; } return source; } /** * @memberOf module:zrender/core/util * @param {*} target * @param {*} source * @param {boolean} [overwrite=false] */ function merge(target, source, overwrite) { // We should escapse that source is string // and enter for ... in ... if (!isObject(source) || !isObject(target)) { return overwrite ? clone(source) : target; } for (var key in source) { if (source.hasOwnProperty(key)) { var targetProp = target[key]; var sourceProp = source[key]; if (isObject(sourceProp) && isObject(targetProp) && !isArray(sourceProp) && !isArray(targetProp) && !isDom(sourceProp) && !isDom(targetProp) && !isBuildInObject(sourceProp) && !isBuildInObject(targetProp) ) { // 如果需要递归覆盖,就递归调用merge merge(targetProp, sourceProp, overwrite); } else if (overwrite || !(key in target)) { // 否则只处理overwrite为true,或者在目标对象中没有此属性的情况 // NOTE,在 target[key] 不存在的时候也是直接覆盖 target[key] = clone(source[key], true); } } } return target; } /** * @param {Array} targetAndSources The first item is target, and the rests are source. * @param {boolean} [overwrite=false] * @return {*} target */ function mergeAll(targetAndSources, overwrite) { var result = targetAndSources[0]; for (var i = 1, len = targetAndSources.length; i < len; i++) { result = merge(result, targetAndSources[i], overwrite); } return result; } /** * @param {*} target * @param {*} source * @memberOf module:zrender/core/util */ function extend(target, source) { for (var key in source) { if (source.hasOwnProperty(key)) { target[key] = source[key]; } } return target; } /** * @param {*} target * @param {*} source * @param {boolen} [overlay=false] * @memberOf module:zrender/core/util */ function defaults(target, source, overlay) { for (var key in source) { if (source.hasOwnProperty(key) && (overlay ? source[key] != null : target[key] == null) ) { target[key] = source[key]; } } return target; } function createCanvas() { return document.createElement('canvas'); } // FIXME var _ctx; function getContext() { if (!_ctx) { // Use util.createCanvas instead of createCanvas // because createCanvas may be overwritten in different environment _ctx = util.createCanvas().getContext('2d'); } return _ctx; } /** * 查询数组中元素的index * @memberOf module:zrender/core/util */ function indexOf(array, value) { if (array) { if (array.indexOf) { return array.indexOf(value); } for (var i = 0, len = array.length; i < len; i++) { if (array[i] === value) { return i; } } } return -1; } /** * 构造类继承关系 * * @memberOf module:zrender/core/util * @param {Function} clazz 源类 * @param {Function} baseClazz 基类 */ function inherits(clazz, baseClazz) { var clazzPrototype = clazz.prototype; function F() {} F.prototype = baseClazz.prototype; clazz.prototype = new F(); for (var prop in clazzPrototype) { clazz.prototype[prop] = clazzPrototype[prop]; } clazz.prototype.constructor = clazz; clazz.superClass = baseClazz; } /** * @memberOf module:zrender/core/util * @param {Object|Function} target * @param {Object|Function} sorce * @param {boolean} overlay */ function mixin(target, source, overlay) { target = 'prototype' in target ? target.prototype : target; source = 'prototype' in source ? source.prototype : source; defaults(target, source, overlay); } /** * @param {Array|TypedArray} data */ function isArrayLike(data) { if (! data) { return; } if (typeof data == 'string') { return false; } return typeof data.length == 'number'; } /** * 数组或对象遍历 * @memberOf module:zrender/core/util * @param {Object|Array} obj * @param {Function} cb * @param {*} [context] */ function each(obj, cb, context) { if (!(obj && cb)) { return; } if (obj.forEach && obj.forEach === nativeForEach) { obj.forEach(cb, context); } else if (obj.length === +obj.length) { for (var i = 0, len = obj.length; i < len; i++) { cb.call(context, obj[i], i, obj); } } else { for (var key in obj) { if (obj.hasOwnProperty(key)) { cb.call(context, obj[key], key, obj); } } } } /** * 数组映射 * @memberOf module:zrender/core/util * @param {Array} obj * @param {Function} cb * @param {*} [context] * @return {Array} */ function map(obj, cb, context) { if (!(obj && cb)) { return; } if (obj.map && obj.map === nativeMap) { return obj.map(cb, context); } else { var result = []; for (var i = 0, len = obj.length; i < len; i++) { result.push(cb.call(context, obj[i], i, obj)); } return result; } } /** * @memberOf module:zrender/core/util * @param {Array} obj * @param {Function} cb * @param {Object} [memo] * @param {*} [context] * @return {Array} */ function reduce(obj, cb, memo, context) { if (!(obj && cb)) { return; } if (obj.reduce && obj.reduce === nativeReduce) { return obj.reduce(cb, memo, context); } else { for (var i = 0, len = obj.length; i < len; i++) { memo = cb.call(context, memo, obj[i], i, obj); } return memo; } } /** * 数组过滤 * @memberOf module:zrender/core/util * @param {Array} obj * @param {Function} cb * @param {*} [context] * @return {Array} */ function filter(obj, cb, context) { if (!(obj && cb)) { return; } if (obj.filter && obj.filter === nativeFilter) { return obj.filter(cb, context); } else { var result = []; for (var i = 0, len = obj.length; i < len; i++) { if (cb.call(context, obj[i], i, obj)) { result.push(obj[i]); } } return result; } } /** * 数组项查找 * @memberOf module:zrender/core/util * @param {Array} obj * @param {Function} cb * @param {*} [context] * @return {Array} */ function find(obj, cb, context) { if (!(obj && cb)) { return; } for (var i = 0, len = obj.length; i < len; i++) { if (cb.call(context, obj[i], i, obj)) { return obj[i]; } } } /** * @memberOf module:zrender/core/util * @param {Function} func * @param {*} context * @return {Function} */ function bind(func, context) { var args = nativeSlice.call(arguments, 2); return function () { return func.apply(context, args.concat(nativeSlice.call(arguments))); }; } /** * @memberOf module:zrender/core/util * @param {Function} func * @return {Function} */ function curry(func) { var args = nativeSlice.call(arguments, 1); return function () { return func.apply(this, args.concat(nativeSlice.call(arguments))); }; } /** * @memberOf module:zrender/core/util * @param {*} value * @return {boolean} */ function isArray(value) { return objToString.call(value) === '[object Array]'; } /** * @memberOf module:zrender/core/util * @param {*} value * @return {boolean} */ function isFunction(value) { return typeof value === 'function'; } /** * @memberOf module:zrender/core/util * @param {*} value * @return {boolean} */ function isString(value) { return objToString.call(value) === '[object String]'; } /** * @memberOf module:zrender/core/util * @param {*} value * @return {boolean} */ function isObject(value) { // Avoid a V8 JIT bug in Chrome 19-20. // See https://code.google.com/p/v8/issues/detail?id=2291 for more details. var type = typeof value; return type === 'function' || (!!value && type == 'object'); } /** * @memberOf module:zrender/core/util * @param {*} value * @return {boolean} */ function isBuildInObject(value) { return !!BUILTIN_OBJECT[objToString.call(value)] || (value instanceof Gradient); } /** * @memberOf module:zrender/core/util * @param {*} value * @return {boolean} */ function isDom(value) { return value && value.nodeType === 1 && typeof(value.nodeName) == 'string'; } /** * If value1 is not null, then return value1, otherwise judget rest of values. * @memberOf module:zrender/core/util * @return {*} Final value */ function retrieve(values) { for (var i = 0, len = arguments.length; i < len; i++) { if (arguments[i] != null) { return arguments[i]; } } } /** * @memberOf module:zrender/core/util * @param {Array} arr * @param {number} startIndex * @param {number} endIndex * @return {Array} */ function slice() { return Function.call.apply(nativeSlice, arguments); } /** * @memberOf module:zrender/core/util * @param {boolean} condition * @param {string} message */ function assert(condition, message) { if (!condition) { throw new Error(message); } } var util = { inherits: inherits, mixin: mixin, clone: clone, merge: merge, mergeAll: mergeAll, extend: extend, defaults: defaults, getContext: getContext, createCanvas: createCanvas, indexOf: indexOf, slice: slice, find: find, isArrayLike: isArrayLike, each: each, map: map, reduce: reduce, filter: filter, bind: bind, curry: curry, isArray: isArray, isString: isString, isObject: isObject, isFunction: isFunction, isBuildInObject: isBuildInObject, isDom: isDom, retrieve: retrieve, assert: assert, noop: function () {} }; return util; });