avalon.js

/*==================================================
 Copyright (c) 2013-2015 司徒正美 and other contributors
 http://www.cnblogs.com/rubylouvre/
 https://github.com/RubyLouvre
 http://weibo.com/jslouvre/
 
 Released under the MIT license
 avalon.js 1.44 built in 2015.6.17
 support IE6+ and other browsers
 ==================================================*/
(function(global, factory) {

    if (typeof module === "object" && typeof module.exports === "object") {
        // For CommonJS and CommonJS-like environments where a proper `window`
        // is present, execute the factory and get avalon.
        // For environments that do not have a `window` with a `document`
        // (such as Node.js), expose a factory as module.exports.
        // This accentuates the need for the creation of a real `window`.
        // e.g. var avalon = require("avalon")(window);
        module.exports = global.document ? factory(global, true) : function(w) {
            if (!w.document) {
                throw new Error("Avalon requires a window with a document")
            }
            return factory(w)
        }
    } else {
        factory(global)
    }

// Pass this if window is not defined yet
}(typeof window !== "undefined" ? window : this, function(window, noGlobal){

/*********************************************************************
 *                    全局变量及方法                                  *
 **********************************************************************/
var expose = new Date() - 0
//http://stackoverflow.com/questions/7290086/javascript-use-strict-and-nicks-find-global-function
var DOC = window.document
var head = DOC.getElementsByTagName("head")[0] //HEAD元素
var ifGroup = head.insertBefore(document.createElement("avalon"), head.firstChild) //避免IE6 base标签BUG
ifGroup.innerHTML = "X<style id='avalonStyle'>.avalonHide{ display: none!important }</style>"
ifGroup.setAttribute("ms-skip", "1")
ifGroup.className = "avalonHide"
var rnative = /\[native code\]/ //判定是否原生函数
function log() {
    if (window.console && avalon.config.debug) {
        // http://stackoverflow.com/questions/8785624/how-to-safely-wrap-console-log
        Function.apply.call(console.log, console, arguments)
    }
}


var subscribers = "$" + expose
var otherRequire = window.require
var otherDefine = window.define
var innerRequire
var stopRepeatAssign = false
var rword = /[^, ]+/g //切割字符串为一个个小块，以空格或豆号分开它们，结合replace实现字符串的forEach
var rcomplexType = /^(?:object|array)$/
var rsvg = /^\[object SVG\w*Element\]$/
var rwindow = /^\[object (?:Window|DOMWindow|global)\]$/
var oproto = Object.prototype
var ohasOwn = oproto.hasOwnProperty
var serialize = oproto.toString
var ap = Array.prototype
var aslice = ap.slice
var Registry = {} //将函数曝光到此对象上，方便访问器收集依赖
var W3C = window.dispatchEvent
var root = DOC.documentElement
var avalonFragment = DOC.createDocumentFragment()
var cinerator = DOC.createElement("div")
var class2type = {}
"Boolean Number String Function Array Date RegExp Object Error".replace(rword, function(name) {
    class2type["[object " + name + "]"] = name.toLowerCase()
})


function noop() {
}


function oneObject(array, val) {
    if (typeof array === "string") {
        array = array.match(rword) || []
    }
    var result = {},
            value = val !== void 0 ? val : 1
    for (var i = 0, n = array.length; i < n; i++) {
        result[array[i]] = value
    }
    return result
}

//生成UUID http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript
var generateID = function(prefix) {
    prefix = prefix || "avalon"
    return String(Math.random() + Math.random()).replace(/\d\.\d{4}/, prefix)
}
function IE() {
    if (window.VBArray) {
        var mode = document.documentMode
        return mode ? mode : window.XMLHttpRequest ? 7 : 6
    } else {
        return 0
    }
}
var IEVersion = IE()

avalon = function(el) { //创建jQuery式的无new 实例化结构
    return new avalon.init(el)
}

/*视浏览器情况采用最快的异步回调*/
avalon.nextTick = new function() {// jshint ignore:line
    var tickImmediate = window.setImmediate
    var tickObserver = window.MutationObserver
    var tickPost = W3C && window.postMessage
    if (tickImmediate) {
        return tickImmediate.bind(window)
    }

    var queue = []
    function callback() {
        var n = queue.length
        for (var i = 0; i < n; i++) {
            queue[i]()
        }
        queue = queue.slice(n)
    }

    if (tickObserver) {
        var node = document.createTextNode("avalon")
        new tickObserver(callback).observe(node, {characterData: true})// jshint ignore:line
        return function(fn) {
            queue.push(fn)
            node.data = Math.random()
        }
    }

    if (tickPost) {
        window.addEventListener("message", function(e) {
            var source = e.source
            if ((source === window || source === null) && e.data === "process-tick") {
                e.stopPropagation()
                callback()
            }
        })

        return function(fn) {
            queue.push(fn)
            window.postMessage('process-tick', '*')
        }
    }

    return function(fn) {
        setTimeout(fn, 0)
    }
}// jshint ignore:line
/*********************************************************************
 *                 avalon的静态方法定义区                              *
 **********************************************************************/
avalon.init = function(el) {
    this[0] = this.element = el
}
avalon.fn = avalon.prototype = avalon.init.prototype

avalon.type = function(obj) { //取得目标的类型
    if (obj == null) {
        return String(obj)
    }
    // 早期的webkit内核浏览器实现了已废弃的ecma262v4标准，可以将正则字面量当作函数使用，因此typeof在判定正则时会返回function
    return typeof obj === "object" || typeof obj === "function" ?
            class2type[serialize.call(obj)] || "object" :
            typeof obj
}

var isFunction = typeof alert === "object" ? function(fn) {
    try {
        return /^\s*\bfunction\b/.test(fn + "")
    } catch (e) {
        return false
    }
} : function(fn) {
    return serialize.call(fn) === "[object Function]"
}
avalon.isFunction = isFunction

avalon.isWindow = function(obj) {
    if (!obj)
        return false
    // 利用IE678 window == document为true,document == window竟然为false的神奇特性
    // 标准浏览器及IE9，IE10等使用 正则检测
    return obj == obj.document && obj.document != obj //jshint ignore:line
}

function isWindow(obj) {
    return rwindow.test(serialize.call(obj))
}
if (isWindow(window)) {
    avalon.isWindow = isWindow
}
var enu
for (enu in avalon({})) {
    break
}
var enumerateBUG = enu !== "0" //IE6下为true, 其他为false
/*判定是否是一个朴素的javascript对象（Object），不是DOM对象，不是BOM对象，不是自定义类的实例*/
avalon.isPlainObject = function(obj, key) {
    if (!obj || avalon.type(obj) !== "object" || obj.nodeType || avalon.isWindow(obj)) {
        return false;
    }
    try { //IE内置对象没有constructor
        if (obj.constructor && !ohasOwn.call(obj, "constructor") && !ohasOwn.call(obj.constructor.prototype, "isPrototypeOf")) {
            return false;
        }
    } catch (e) { //IE8 9会在这里抛错
        return false;
    }
    if (enumerateBUG) {
        for (key in obj) {
            return ohasOwn.call(obj, key)
        }
    }
    for (key in obj) {
    }
    return key === void 0 || ohasOwn.call(obj, key)
}
if (rnative.test(Object.getPrototypeOf)) {
    avalon.isPlainObject = function(obj) {
        // 简单的 typeof obj === "object"检测，会致使用isPlainObject(window)在opera下通不过
        return serialize.call(obj) === "[object Object]" && Object.getPrototypeOf(obj) === oproto
    }
}
//与jQuery.extend方法，可用于浅拷贝，深拷贝
avalon.mix = avalon.fn.mix = function() {
    var options, name, src, copy, copyIsArray, clone,
            target = arguments[0] || {},
            i = 1,
            length = arguments.length,
            deep = false

    // 如果第一个参数为布尔,判定是否深拷贝
    if (typeof target === "boolean") {
        deep = target
        target = arguments[1] || {}
        i++
    }

    //确保接受方为一个复杂的数据类型
    if (typeof target !== "object" && !isFunction(target)) {
        target = {}
    }

    //如果只有一个参数，那么新成员添加于mix所在的对象上
    if (i === length) {
        target = this
        i--
    }

    for (; i < length; i++) {
        //只处理非空参数
        if ((options = arguments[i]) != null) {
            for (name in options) {
                src = target[name]
                try {
                    copy = options[name] //当options为VBS对象时报错
                } catch (e) {
                    continue
                }

                // 防止环引用
                if (target === copy) {
                    continue
                }
                if (deep && copy && (avalon.isPlainObject(copy) || (copyIsArray = Array.isArray(copy)))) {

                    if (copyIsArray) {
                        copyIsArray = false
                        clone = src && Array.isArray(src) ? src : []

                    } else {
                        clone = src && avalon.isPlainObject(src) ? src : {}
                    }

                    target[name] = avalon.mix(deep, clone, copy)
                } else if (copy !== void 0) {
                    target[name] = copy
                }
            }
        }
    }
    return target
}

function _number(a, len) { //用于模拟slice, splice的效果
    a = Math.floor(a) || 0
    return a < 0 ? Math.max(len + a, 0) : Math.min(a, len);
}
avalon.mix({
    rword: rword,
    subscribers: subscribers,
    version: 1.44,
    ui: {},
    log: log,
    slice: W3C ? function(nodes, start, end) {
        return aslice.call(nodes, start, end)
    } : function(nodes, start, end) {
        var ret = []
        var len = nodes.length
        if (end === void 0)
            end = len
        if (typeof end === "number" && isFinite(end)) {
            start = _number(start, len)
            end = _number(end, len)
            for (var i = start; i < end; ++i) {
                ret[i - start] = nodes[i]
            }
        }
        return ret
    },
    noop: noop,
    /*如果不用Error对象封装一下，str在控制台下可能会乱码*/
    error: function(str, e) {
        throw  (e || Error)(str)
    },
    /*将一个以空格或逗号隔开的字符串或数组,转换成一个键值都为1的对象*/
    oneObject: oneObject,
    /* avalon.range(10)
     => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
     avalon.range(1, 11)
     => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
     avalon.range(0, 30, 5)
     => [0, 5, 10, 15, 20, 25]
     avalon.range(0, -10, -1)
     => [0, -1, -2, -3, -4, -5, -6, -7, -8, -9]
     avalon.range(0)
     => []*/
    range: function(start, end, step) { // 用于生成整数数组
        step || (step = 1)
        if (end == null) {
            end = start || 0
            start = 0
        }
        var index = -1,
                length = Math.max(0, Math.ceil((end - start) / step)),
                result = new Array(length)
        while (++index < length) {
            result[index] = start
            start += step
        }
        return result
    },
    eventHooks: {},
    /*绑定事件*/
    bind: function(el, type, fn, phase) {
        var hooks = avalon.eventHooks
        var hook = hooks[type]
        if (typeof hook === "object") {
            type = hook.type
            if (hook.deel) {
                 fn = hook.deel(el, type, fn, phase)
            }
        }
        var callback = W3C ? fn : function(e) {
            fn.call(el, fixEvent(e));
        }
        if (W3C) {
            el.addEventListener(type, callback, !!phase)
        } else {
            el.attachEvent("on" + type, callback)
        }
        return callback
    },
    /*卸载事件*/
    unbind: function(el, type, fn, phase) {
        var hooks = avalon.eventHooks
        var hook = hooks[type]
        var callback = fn || noop
        if (typeof hook === "object") {
            type = hook.type
            if (hook.deel) {
                fn = hook.deel(el, type, fn, false)
            }
        }
        if (W3C) {
            el.removeEventListener(type, callback, !!phase)
        } else {
            el.detachEvent("on" + type, callback)
        }
    },
    /*读写删除元素节点的样式*/
    css: function(node, name, value) {
        if (node instanceof avalon) {
            node = node[0]
        }
        var prop = /[_-]/.test(name) ? camelize(name) : name, fn
        name = avalon.cssName(prop) || prop
        if (value === void 0 || typeof value === "boolean") { //获取样式
            fn = cssHooks[prop + ":get"] || cssHooks["@:get"]
            if (name === "background") {
                name = "backgroundColor"
            }
            var val = fn(node, name)
            return value === true ? parseFloat(val) || 0 : val
        } else if (value === "") { //请除样式
            node.style[name] = ""
        } else { //设置样式
            if (value == null || value !== value) {
                return
            }
            if (isFinite(value) && !avalon.cssNumber[prop]) {
                value += "px"
            }
            fn = cssHooks[prop + ":set"] || cssHooks["@:set"]
            fn(node, name, value)
        }
    },
    /*遍历数组与对象,回调的第一个参数为索引或键名,第二个或元素或键值*/
    each: function(obj, fn) {
        if (obj) { //排除null, undefined
            var i = 0
            if (isArrayLike(obj)) {
                for (var n = obj.length; i < n; i++) {
                    if (fn(i, obj[i]) === false)
                        break
                }
            } else {
                for (i in obj) {
                    if (obj.hasOwnProperty(i) && fn(i, obj[i]) === false) {
                        break
                    }
                }
            }
        }
    },
    //收集元素的data-{{prefix}}-*属性，并转换为对象
    getWidgetData: function(elem, prefix) {
        var raw = avalon(elem).data()
        var result = {}
        for (var i in raw) {
            if (i.indexOf(prefix) === 0) {
                result[i.replace(prefix, "").replace(/\w/, function(a) {
                    return a.toLowerCase()
                })] = raw[i]
            }
        }
        return result
    },
    Array: {
        /*只有当前数组不存在此元素时只添加它*/
        ensure: function(target, item) {
            if (target.indexOf(item) === -1) {
                return target.push(item)
            }
        },
        /*移除数组中指定位置的元素，返回布尔表示成功与否*/
        removeAt: function(target, index) {
            return !!target.splice(index, 1).length
        },
        /*移除数组中第一个匹配传参的那个元素，返回布尔表示成功与否*/
        remove: function(target, item) {
            var index = target.indexOf(item)
            if (~index)
                return avalon.Array.removeAt(target, index)
            return false
        }
    }
})

var bindingHandlers = avalon.bindingHandlers = {}
var bindingExecutors = avalon.bindingExecutors = {}

/*判定是否类数组，如节点集合，纯数组，arguments与拥有非负整数的length属性的纯JS对象*/
function isArrayLike(obj) {
    if (!obj)
        return false
    var n = obj.length
    if (n === (n >>> 0)) { //检测length属性是否为非负整数
        var type = serialize.call(obj).slice(8, -1)
        if (/(?:regexp|string|function|window|global)$/i.test(type))
            return false
        if (type === "Array")
            return true
        try {
            if ({}.propertyIsEnumerable.call(obj, "length") === false) { //如果是原生对象
                return  /^\s?function/.test(obj.item || obj.callee)
            }
            return true
        } catch (e) { //IE的NodeList直接抛错
            return !obj.window //IE6-8 window
        }
    }
    return false
}


// https://github.com/rsms/js-lru
var Cache = new function() {// jshint ignore:line
    function LRU(maxLength) {
        this.size = 0
        this.limit = maxLength
        this.head = this.tail = void 0
        this._keymap = {}
    }

    var p = LRU.prototype

    p.put = function(key, value) {
        var entry = {
            key: key,
            value: value
        }
        this._keymap[key] = entry
        if (this.tail) {
            this.tail.newer = entry
            entry.older = this.tail
        } else {
            this.head = entry
        }
        this.tail = entry
        if (this.size === this.limit) {
            this.shift()
        } else {
            this.size++
        }
        return value
    }

    p.shift = function() {
        var entry = this.head
        if (entry) {
            this.head = this.head.newer
            this.head.older =
                    entry.newer =
                    entry.older =
                    this._keymap[entry.key] = void 0
        }
    }
    p.get = function(key) {
        var entry = this._keymap[key]
        if (entry === void 0)
            return
        if (entry === this.tail) {
            return  entry.value
        }
        // HEAD--------------TAIL
        //   <.older   .newer>
        //  <--- add direction --
        //   A  B  C  <D>  E
        if (entry.newer) {
            if (entry === this.head) {
                this.head = entry.newer
            }
            entry.newer.older = entry.older // C <-- E.
        }
        if (entry.older) {
            entry.older.newer = entry.newer // C. --> E
        }
        entry.newer = void 0 // D --x
        entry.older = this.tail // D. --> E
        if (this.tail) {
            this.tail.newer = entry // E. <-- D
        }
        this.tail = entry
        return entry.value
    }
    return LRU
}// jshint ignore:line

/*********************************************************************
 *                         javascript 底层补丁                       *
 **********************************************************************/
if (!"司徒正美".trim) {
    var rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g
    String.prototype.trim = function () {
        return this.replace(rtrim, "")
    }
}
var hasDontEnumBug = !({
    'toString': null
}).propertyIsEnumerable('toString'),
        hasProtoEnumBug = (function () {
        }).propertyIsEnumerable('prototype'),
        dontEnums = [
            "toString",
            "toLocaleString",
            "valueOf",
            "hasOwnProperty",
            "isPrototypeOf",
            "propertyIsEnumerable",
            "constructor"
        ],
        dontEnumsLength = dontEnums.length;
if (!Object.keys) {
    Object.keys = function (object) { //ecma262v5 15.2.3.14
        var theKeys = []
        var skipProto = hasProtoEnumBug && typeof object === "function"
        if (typeof object === "string" || (object && object.callee)) {
            for (var i = 0; i < object.length; ++i) {
                theKeys.push(String(i))
            }
        } else {
            for (var name in object) {
                if (!(skipProto && name === "prototype") && ohasOwn.call(object, name)) {
                    theKeys.push(String(name))
                }
            }
        }

        if (hasDontEnumBug) {
            var ctor = object.constructor,
                    skipConstructor = ctor && ctor.prototype === object
            for (var j = 0; j < dontEnumsLength; j++) {
                var dontEnum = dontEnums[j]
                if (!(skipConstructor && dontEnum === "constructor") && ohasOwn.call(object, dontEnum)) {
                    theKeys.push(dontEnum)
                }
            }
        }
        return theKeys
    }
}
if (!Array.isArray) {
    Array.isArray = function (a) {
        return serialize.call(a) === "[object Array]"
    }
}

if (!noop.bind) {
    Function.prototype.bind = function (scope) {
        if (arguments.length < 2 && scope === void 0)
            return this
        var fn = this,
                argv = arguments
        return function () {
            var args = [],
                    i
            for (i = 1; i < argv.length; i++)
                args.push(argv[i])
            for (i = 0; i < arguments.length; i++)
                args.push(arguments[i])
            return fn.apply(scope, args)
        }
    }
}

function iterator(vars, body, ret) {
    var fun = 'for(var ' + vars + 'i=0,n = this.length; i < n; i++){' + body.replace('_', '((i in this) && fn.call(scope,this[i],i,this))') + '}' + ret
    /* jshint ignore:start */
    return Function("fn,scope", fun)
    /* jshint ignore:end */
}
if (!rnative.test([].map)) {
    avalon.mix(ap, {
        //定位操作，返回数组中第一个等于给定参数的元素的索引值。
        indexOf: function (item, index) {
            var n = this.length,
                    i = ~~index
            if (i < 0)
                i += n
            for (; i < n; i++)
                if (this[i] === item)
                    return i
            return -1
        },
        //定位操作，同上，不过是从后遍历。
        lastIndexOf: function (item, index) {
            var n = this.length,
                    i = index == null ? n - 1 : index
            if (i < 0)
                i = Math.max(0, n + i)
            for (; i >= 0; i--)
                if (this[i] === item)
                    return i
            return -1
        },
        //迭代操作，将数组的元素挨个儿传入一个函数中执行。Prototype.js的对应名字为each。
        forEach: iterator("", '_', ""),
        //迭代类 在数组中的每个项上运行一个函数，如果此函数的值为真，则此元素作为新数组的元素收集起来，并返回新数组
        filter: iterator('r=[],j=0,', 'if(_)r[j++]=this[i]', 'return r'),
        //收集操作，将数组的元素挨个儿传入一个函数中执行，然后把它们的返回值组成一个新数组返回。Prototype.js的对应名字为collect。
        map: iterator('r=[],', 'r[i]=_', 'return r'),
        //只要数组中有一个元素满足条件（放进给定函数返回true），那么它就返回true。Prototype.js的对应名字为any。
        some: iterator("", 'if(_)return true', 'return false'),
        //只有数组中的元素都满足条件（放进给定函数返回true），它才返回true。Prototype.js的对应名字为all。
        every: iterator("", 'if(!_)return false', 'return true')
    })
}
/*********************************************************************
 *                           DOM 底层补丁                             *
 **********************************************************************/

function fixContains(root, el) {
    try { //IE6-8,游离于DOM树外的文本节点，访问parentNode有时会抛错
        while ((el = el.parentNode))
            if (el === root)
                return true
        return false
    } catch (e) {
        return false
    }
}
avalon.contains = fixContains
//IE6-11的文档对象没有contains
if (!DOC.contains) {
    DOC.contains = function (b) {
        return fixContains(DOC, b)
    }
}

function outerHTML() {
    return new XMLSerializer().serializeToString(this)
}

if (window.SVGElement) {
    //safari5+是把contains方法放在Element.prototype上而不是Node.prototype
    if (!DOC.createTextNode("x").contains) {
        Node.prototype.contains = function (arg) {//IE6-8没有Node对象
            return !!(this.compareDocumentPosition(arg) & 16)
        }
    }
    var svgns = "http://www.w3.org/2000/svg"
    var svg = DOC.createElementNS(svgns, "svg")
    svg.innerHTML = '<circle cx="50" cy="50" r="40" fill="red" />'
    if (!rsvg.test(svg.firstChild)) { // #409
        function enumerateNode(node, targetNode) {// jshint ignore:line
            if (node && node.childNodes) {
                var nodes = node.childNodes
                for (var i = 0, el; el = nodes[i++]; ) {
                    if (el.tagName) {
                        var svg = DOC.createElementNS(svgns,
                                el.tagName.toLowerCase())
                        ap.forEach.call(el.attributes, function (attr) {
                            svg.setAttribute(attr.name, attr.value) //复制属性
                        })// jshint ignore:line
                        // 递归处理子节点
                        enumerateNode(el, svg)
                        targetNode.appendChild(svg)
                    }
                }
            }
        }
        Object.defineProperties(SVGElement.prototype, {
            "outerHTML": {//IE9-11,firefox不支持SVG元素的innerHTML,outerHTML属性
                enumerable: true,
                configurable: true,
                get: outerHTML,
                set: function (html) {
                    var tagName = this.tagName.toLowerCase(),
                            par = this.parentNode,
                            frag = avalon.parseHTML(html)
                    // 操作的svg，直接插入
                    if (tagName === "svg") {
                        par.insertBefore(frag, this)
                        // svg节点的子节点类似
                    } else {
                        var newFrag = DOC.createDocumentFragment()
                        enumerateNode(frag, newFrag)
                        par.insertBefore(newFrag, this)
                    }
                    par.removeChild(this)
                }
            },
            "innerHTML": {
                enumerable: true,
                configurable: true,
                get: function () {
                    var s = this.outerHTML
                    var ropen = new RegExp("<" + this.nodeName + '\\b(?:(["\'])[^"]*?(\\1)|[^>])*>', "i")
                    var rclose = new RegExp("<\/" + this.nodeName + ">$", "i")
                    return s.replace(ropen, "").replace(rclose, "")
                },
                set: function (html) {
                    if (avalon.clearHTML) {
                        avalon.clearHTML(this)
                        var frag = avalon.parseHTML(html)
                        enumerateNode(frag, this)
                    }
                }
            }
        })
    }
}
if (!root.outerHTML && window.HTMLElement) { //firefox 到11时才有outerHTML
    HTMLElement.prototype.__defineGetter__("outerHTML", outerHTML);
}

//============================= event binding =======================
var rmouseEvent = /^(?:mouse|contextmenu|drag)|click/
function fixEvent(event) {
    var ret = {}
    for (var i in event) {
        ret[i] = event[i]
    }
    var target = ret.target = event.srcElement
    if (event.type.indexOf("key") === 0) {
        ret.which = event.charCode != null ? event.charCode : event.keyCode
    } else if (rmouseEvent.test(event.type)) {
        var doc = target.ownerDocument || DOC
        var box = doc.compatMode === "BackCompat" ? doc.body : doc.documentElement
        ret.pageX = event.clientX + (box.scrollLeft >> 0) - (box.clientLeft >> 0)
        ret.pageY = event.clientY + (box.scrollTop >> 0) - (box.clientTop >> 0)
        ret.wheelDeltaY = ret.wheelDelta
        ret.wheelDeltaX = 0
    }
    ret.timeStamp = new Date() - 0
    ret.originalEvent = event
    ret.preventDefault = function () { //阻止默认行为
        event.returnValue = false
    }
    ret.stopPropagation = function () { //阻止事件在DOM树中的传播
        event.cancelBubble = true
    }
    return ret
}

var eventHooks = avalon.eventHooks
//针对firefox, chrome修正mouseenter, mouseleave
if (!("onmouseenter" in root)) {
    avalon.each({
        mouseenter: "mouseover",
        mouseleave: "mouseout"
    }, function (origType, fixType) {
        eventHooks[origType] = {
            type: fixType,
            deel: function (elem, _, fn) {
                return function (e) {
                    var t = e.relatedTarget
                    if (!t || (t !== elem && !(elem.compareDocumentPosition(t) & 16))) {
                        delete e.type
                        e.type = origType
                        return fn.call(elem, e)
                    }
                }
            }
        }
    })
}
//针对IE9+, w3c修正animationend
avalon.each({
    AnimationEvent: "animationend",
    WebKitAnimationEvent: "webkitAnimationEnd"
}, function (construct, fixType) {
    if (window[construct] && !eventHooks.animationend) {
        eventHooks.animationend = {
            type: fixType
        }
    }
})
//针对IE6-8修正input
if (!("oninput" in DOC.createElement("input"))) {
    eventHooks.input = {
        type: "propertychange",
        deel: function (elem, _, fn) {
            return function (e) {
                if (e.propertyName === "value") {
                    e.type = "input"
                    return fn.call(elem, e)
                }
            }
        }
    }
}
if (DOC.onmousewheel === void 0) {
    /* IE6-11 chrome mousewheel wheelDetla 下 -120 上 120
     firefox DOMMouseScroll detail 下3 上-3
     firefox wheel detlaY 下3 上-3
     IE9-11 wheel deltaY 下40 上-40
     chrome wheel deltaY 下100 上-100 */
    var fixWheelType = DOC.onwheel !== void 0 ? "wheel" : "DOMMouseScroll"
    var fixWheelDelta = fixWheelType === "wheel" ? "deltaY" : "detail"
    eventHooks.mousewheel = {
        type: fixWheelType,
        deel: function (elem, _, fn) {
            return function (e) {
                e.wheelDeltaY = e.wheelDelta = e[fixWheelDelta] > 0 ? -120 : 120
                e.wheelDeltaX = 0
                if (Object.defineProperty) {
                    Object.defineProperty(e, "type", {
                        value: "mousewheel"
                    })
                }
                fn.call(elem, e)
            }
        }
    }
}


/*********************************************************************
 *                           配置系统                                 *
 **********************************************************************/

function kernel(settings) {
    for (var p in settings) {
        if (!ohasOwn.call(settings, p))
            continue
        var val = settings[p]
        if (typeof kernel.plugins[p] === "function") {
            kernel.plugins[p](val)
        } else if (typeof kernel[p] === "object") {
            avalon.mix(kernel[p], val)
        } else {
            kernel[p] = val
        }
    }
    return this
}
var openTag, closeTag, rexpr, rexprg, rbind, rregexp = /[-.*+?^${}()|[\]\/\\]/g

function escapeRegExp(target) {
    //http://stevenlevithan.com/regex/xregexp/
    //将字符串安全格式化为正则表达式的源码
    return (target + "").replace(rregexp, "\\$&")
}

var plugins = {
    loader: function (builtin) {
        var flag = innerRequire && builtin
        window.require = flag ? innerRequire : otherRequire
        window.define = flag ? innerRequire.define : otherDefine
    },
    interpolate: function (array) {
        openTag = array[0]
        closeTag = array[1]
        if (openTag === closeTag) {
            throw new SyntaxError("openTag!==closeTag")
        } else if (array + "" === "<!--,-->") {
            kernel.commentInterpolate = true
        } else {
            var test = openTag + "test" + closeTag
            cinerator.innerHTML = test
            if (cinerator.innerHTML !== test && cinerator.innerHTML.indexOf("&lt;") > -1) {
                throw new SyntaxError("此定界符不合法")
            }
            cinerator.innerHTML = ""
        }
        var o = escapeRegExp(openTag),
                c = escapeRegExp(closeTag)
        rexpr = new RegExp(o + "(.*?)" + c)
        rexprg = new RegExp(o + "(.*?)" + c, "g")
        rbind = new RegExp(o + ".*?" + c + "|\\sms-")
    }
}

kernel.debug = true
kernel.plugins = plugins
kernel.plugins['interpolate'](["{{", "}}"])
kernel.paths = {}
kernel.shim = {}
kernel.maxRepeatSize = 100
avalon.config = kernel
var ravalon = /(\w+)\[(avalonctrl)="(\S+)"\]/
var findNodes = DOC.querySelectorAll ? function(str) {
    return DOC.querySelectorAll(str)
} : function(str) {
    var match = str.match(ravalon)
    var all = DOC.getElementsByTagName(match[1])
    var nodes = []
    for (var i = 0, el; el = all[i++]; ) {
        if (el.getAttribute(match[2]) === match[3]) {
            nodes.push(el)
        }
    }
    return nodes
}
/*********************************************************************
 *                            事件总线                               *
 **********************************************************************/
var EventBus = {
    $watch: function (type, callback) {
        if (typeof callback === "function") {
            var callbacks = this.$events[type]
            if (callbacks) {
                callbacks.push(callback)
            } else {
                this.$events[type] = [callback]
            }
        } else { //重新开始监听此VM的第一重简单属性的变动
            this.$events = this.$watch.backup
        }
        return this
    },
    $unwatch: function (type, callback) {
        var n = arguments.length
        if (n === 0) { //让此VM的所有$watch回调无效化
            this.$watch.backup = this.$events
            this.$events = {}
        } else if (n === 1) {
            this.$events[type] = []
        } else {
            var callbacks = this.$events[type] || []
            var i = callbacks.length
            while (~--i < 0) {
                if (callbacks[i] === callback) {
                    return callbacks.splice(i, 1)
                }
            }
        }
        return this
    },
    $fire: function (type) {
        var special, i, v, callback
        if (/^(\w+)!(\S+)$/.test(type)) {
            special = RegExp.$1
            type = RegExp.$2
        }
        var events = this.$events
        if (!events)
            return
        var args = aslice.call(arguments, 1)
        var detail = [type].concat(args)
        if (special === "all") {
            for (i in avalon.vmodels) {
                v = avalon.vmodels[i]
                if (v !== this) {
                    v.$fire.apply(v, detail)
                }
            }
        } else if (special === "up" || special === "down") {
            var elements = events.expr ? findNodes(events.expr) : []
            if (elements.length === 0)
                return
            for (i in avalon.vmodels) {
                v = avalon.vmodels[i]
                if (v !== this) {
                    if (v.$events.expr) {
                        var eventNodes = findNodes(v.$events.expr)
                        if (eventNodes.length === 0) {
                            continue
                        }
                        //循环两个vmodel中的节点，查找匹配（向上匹配或者向下匹配）的节点并设置标识
                        /* jshint ignore:start */
                        ap.forEach.call(eventNodes, function (node) {
                            ap.forEach.call(elements, function (element) {
                                var ok = special === "down" ? element.contains(node) : //向下捕获
                                        node.contains(element) //向上冒泡
                                if (ok) {
                                    node._avalon = v //符合条件的加一个标识
                                }
                            });
                        })
                        /* jshint ignore:end */
                    }
                }
            }
            var nodes = DOC.getElementsByTagName("*") //实现节点排序
            var alls = []
            ap.forEach.call(nodes, function (el) {
                if (el._avalon) {
                    alls.push(el._avalon)
                    el._avalon = ""
                    el.removeAttribute("_avalon")
                }
            })
            if (special === "up") {
                alls.reverse()
            }
            for (i = 0; callback = alls[i++]; ) {
                if (callback.$fire.apply(callback, detail) === false) {
                    break
                }
            }
        } else {
            var callbacks = events[type] || []
            var all = events.$all || []
            for (i = 0; callback = callbacks[i++]; ) {
                if (isFunction(callback))
                    callback.apply(this, args)
            }
            for (i = 0; callback = all[i++]; ) {
                if (isFunction(callback))
                    callback.apply(this, arguments)
            }
        }
    }
}

/*********************************************************************
 *                           modelFactory                             *
 **********************************************************************/
//avalon最核心的方法的两个方法之一（另一个是avalon.scan），返回一个ViewModel(VM)
var VMODELS = avalon.vmodels = {} //所有vmodel都储存在这里
avalon.define = function (id, factory) {
    var $id = id.$id || id
    if (!$id) {
        log("warning: vm必须指定$id")
    }
    if (VMODELS[$id]) {
        log("warning: " + $id + " 已经存在于avalon.vmodels中")
    }
    if (typeof id === "object") {
        var model = modelFactory(id)
    } else {
        var scope = {
            $watch: noop
        }
        factory(scope) //得到所有定义

        model = modelFactory(scope) //偷天换日，将scope换为model
        stopRepeatAssign = true
        factory(model)
        stopRepeatAssign = false
    }
    model.$id = $id
    return VMODELS[$id] = model
}

//一些不需要被监听的属性
var $$skipArray = String("$id,$watch,$unwatch,$fire,$events,$model,$skipArray,$proxy,$compute").match(rword)
var defineProperty = Object.defineProperty
var canHideOwn = true
//如果浏览器不支持ecma262v5的Object.defineProperties或者存在BUG，比如IE8
//标准浏览器使用__defineGetter__, __defineSetter__实现
try {
    defineProperty({}, "_", {
        value: "x"
    })
    var defineProperties = Object.defineProperties
} catch (e) {
    canHideOwn = false
}

function modelFactory(source, $special, $model) {
    if (Array.isArray(source)) {
        var arr = source.concat()
        source.length = 0
        var collection = arrayFactory(source)
        collection.pushArray(arr)
        return collection
    }
    //0 null undefined || Node || VModel(fix IE6-8 createWithProxy $val: val引发的BUG)
    if (!source || source.nodeType > 0 || (source.$id && source.$events)) {
        return source
    }
    var $skipArray = Array.isArray(source.$skipArray) ? source.$skipArray : []
    $skipArray.$special = $special || {} //强制要监听的属性
    var $vmodel = {} //要返回的对象, 它在IE6-8下可能被偷龙转凤
    $model = $model || {} //vmodels.$model属性
    var $events = {} //vmodel.$events属性
    var accessors = {} //监控属性
    var computed = []
    $$skipArray.forEach(function (name) {
        delete source[name]
    })

    for (var i in source) {
        (function (name, val, accessor) {
            $model[name] = val
            if (!isObservable(name, val, $skipArray)) {
                return //过滤所有非监控属性
            }
            //总共产生三种accessor
            $events[name] = []
            var valueType = avalon.type(val)
            //总共产生三种accessor
            if (valueType === "object" && isFunction(val.get) && Object.keys(val).length <= 2) {
                accessor = makeComputedAccessor(name, val)
                computed.push(accessor)
            } else if (rcomplexType.test(valueType)) {
                accessor = makeComplexAccessor(name, val, valueType, $events[name])
            } else {
                accessor = makeSimpleAccessor(name, val)
            }
            accessors[name] = accessor
        })(i, source[i])// jshint ignore:line
    }

    $vmodel = defineProperties($vmodel, descriptorFactory(accessors), source) //生成一个空的ViewModel
    for (var name in source) {
        if (!accessors[name]) {
            $vmodel[name] = source[name]
        }
    }
    //添加$id, $model, $events, $watch, $unwatch, $fire
    $vmodel.$id = generateID()
    $vmodel.$model = $model
    $vmodel.$events = $events
    for (i in EventBus) {
        var fn = EventBus[i]
        if (!W3C) { //在IE6-8下，VB对象的方法里的this并不指向自身，需要用bind处理一下
            fn = fn.bind($vmodel)
        }
        $vmodel[i] = fn
    }
    if (canHideOwn) {
        Object.defineProperty($vmodel, "hasOwnProperty", {
            value: function (name) {
                return name in this.$model
            },
            writable: false,
            enumerable: false,
            configurable: true
        })

    } else {
        /* jshint ignore:start */
        $vmodel.hasOwnProperty = function (name) {
            return name in $vmodel.$model
        }
        /* jshint ignore:end */
    }

    $vmodel.$compute = function () {
        computed.forEach(function (accessor) {
            dependencyDetection.begin({
                callback: function (vm, dependency) {//dependency为一个accessor
                    var name = dependency._name
                    if (dependency !== accessor) {
                        var list = vm.$events[name]
                        accessor.vm = $vmodel
                        injectDependency(list, accessor.digest)
                    }
                }
            })
            try {
                accessor.get.call($vmodel)
            } finally {
                dependencyDetection.end()
            }
        })
    }
    $vmodel.$compute()
    return $vmodel
}
//创建一个简单访问器
function makeSimpleAccessor(name, value) {
    function accessor(value) {
        var oldValue = accessor._value
        if (arguments.length > 0) {
            if (!stopRepeatAssign && !isEqual(value, oldValue)) {
                accessor.updateValue(this, value)
                accessor.notify(this, value, oldValue)
            }
            return this
        } else {
            dependencyDetection.collectDependency(this, accessor)
            return oldValue
        }
    }
    accessorFactory(accessor, name)
    accessor._value = value
    return accessor;
}

//创建一个计算访问器
function makeComputedAccessor(name, options) {
    options.set = options.set || noop
    function accessor(value) {//计算属性
        var oldValue = accessor._value
        var init = "_value" in accessor
        if (arguments.length > 0) {
            if (stopRepeatAssign) {
                return this
            }
            accessor.set.call(this, value)
            return this
        } else {
            //将依赖于自己的高层访问器或视图刷新函数（以绑定对象形式）放到自己的订阅数组中
            value = accessor.get.call(this)
            if (oldValue !== value) {
                accessor.updateValue(this, value)
                init && accessor.notify(this, value, oldValue) //触发$watch回调
            }
            //将自己注入到低层访问器的订阅数组中
            return value
        }
    }
    accessor.set = options.set || noop
    accessor.get = options.get
    accessorFactory(accessor, name)
    var id
    accessor.digest = function () {
        accessor.updateValue = globalUpdateModelValue
        accessor.notify = noop
        accessor.call(accessor.vm)
        clearTimeout(id)//如果计算属性存在多个依赖项，那么等它们都更新了才更新视图
        id = setTimeout(function () {
            accessorFactory(accessor, accessor._name)
            accessor.call(accessor.vm)
        })
    }
    return accessor
}

//创建一个复杂访问器
function makeComplexAccessor(name, initValue, valueType, list) {
    function accessor(value) {
        var oldValue = accessor._value
        var son = accessor._vmodel
        if (arguments.length > 0) {
            if (stopRepeatAssign) {
                return this
            }
            if (valueType === "array") {
                var old = son._
                son._ = []
                son.clear()
                son._ = old
                son.pushArray(value)
            } else if (valueType === "object") {
                var $proxy = son.$proxy
                var observes = this.$events[name] || []
                son = accessor._vmodel = modelFactory(value)
                son.$events[subscribers] = observes
                son.$proxy = $proxy
                if (observes.length) {
                    observes.forEach(function (data) {
                        if (data.rollback) {
                            data.rollback() //还原 ms-with ms-on
                        }
                        bindingHandlers[data.type](data, data.vmodels)
                    })
                }
            }
            accessor.updateValue(this, son.$model)
            accessor.notify(this, this._value, oldValue)
            return this
        } else {
            dependencyDetection.collectDependency(this, accessor)
            return son
        }
    }
    accessorFactory(accessor, name)
    var son = accessor._vmodel = modelFactory(initValue)
    son.$events[subscribers] = list
    return accessor
}

function globalUpdateValue(vmodel, value) {
    vmodel.$model[this._name] = this._value = value
}
function globalUpdateModelValue(vmodel, value) {
    vmodel.$model[this._name] = value
}
function globalNotify(vmodel, value, oldValue) {
    var name = this._name
    var array = vmodel.$events[name] //刷新值
    if (array) {
        fireDependencies(array) //同步视图
        EventBus.$fire.call(vmodel, name, value, oldValue) //触发$watch回调
    }
}

function accessorFactory(accessor, name) {
    accessor._name = name
    //同时更新_value与model
    accessor.updateValue = globalUpdateValue
    accessor.notify = globalNotify
}

//比较两个值是否相等
var isEqual = Object.is || function (v1, v2) {
    if (v1 === 0 && v2 === 0) {
        return 1 / v1 === 1 / v2
    } else if (v1 !== v1) {
        return v2 !== v2
    } else {
        return v1 === v2
    }
}

function isObservable(name, value, $skipArray) {
    if (isFunction(value) || value && value.nodeType) {
        return false
    }
    if ($skipArray.indexOf(name) !== -1) {
        return false
    }
    var $special = $skipArray.$special
    if (name && name.charAt(0) === "$" && !$special[name]) {
        return false
    }
    return true
}

var descriptorFactory = W3C ? function (obj) {
    var descriptors = {}
    for (var i in obj) {
        descriptors[i] = {
            get: obj[i],
            set: obj[i],
            enumerable: true,
            configurable: true
        }
    }
    return descriptors
} : function (a) {
    return a
}


//===================修复浏览器对Object.defineProperties的支持=================
if (!canHideOwn) {
    if ("__defineGetter__" in avalon) {
        defineProperty = function (obj, prop, desc) {
            if ('value' in desc) {
                obj[prop] = desc.value
            }
            if ("get" in desc) {
                obj.__defineGetter__(prop, desc.get)
            }
            if ('set' in desc) {
                obj.__defineSetter__(prop, desc.set)
            }
            return obj
        }
        defineProperties = function (obj, descs) {
            for (var prop in descs) {
                if (descs.hasOwnProperty(prop)) {
                    defineProperty(obj, prop, descs[prop])
                }
            }
            return obj
        }
    }
    if (IEVersion) {
        var VBClassPool = {}
        window.execScript([// jshint ignore:line
            "Function parseVB(code)",
            "\tExecuteGlobal(code)",
            "End Function" //转换一段文本为VB代码
        ].join("\n"), "VBScript")
        function VBMediator(instance, accessors, name, value) {// jshint ignore:line
            var accessor = accessors[name]
            if (arguments.length === 4) {
                accessor.call(instance, value)
            } else {
                return accessor.call(instance)
            }
        }
        defineProperties = function (name, accessors, properties) {
            // jshint ignore:line
            var buffer = []
            buffer.push(
                    "\r\n\tPrivate [__data__], [__proxy__]",
                    "\tPublic Default Function [__const__](d, p)",
                    "\t\tSet [__data__] = d: set [__proxy__] = p",
                    "\t\tSet [__const__] = Me", //链式调用
                    "\tEnd Function")
            //添加普通属性,因为VBScript对象不能像JS那样随意增删属性，必须在这里预先定义好
            for (name in properties) {
                if (!accessors.hasOwnProperty(name)) {
                    buffer.push("\tPublic [" + name + "]")
                }
            }
            $$skipArray.forEach(function (name) {
                if (!accessors.hasOwnProperty(name)) {
                    buffer.push("\tPublic [" + name + "]")
                }
            })
            buffer.push("\tPublic [" + 'hasOwnProperty' + "]")
            //添加访问器属性 
            for (name in accessors) {
                buffer.push(
                        //由于不知对方会传入什么,因此set, let都用上
                        "\tPublic Property Let [" + name + "](val" + expose + ")", //setter
                        "\t\tCall [__proxy__](Me,[__data__], \"" + name + "\", val" + expose + ")",
                        "\tEnd Property",
                        "\tPublic Property Set [" + name + "](val" + expose + ")", //setter
                        "\t\tCall [__proxy__](Me,[__data__], \"" + name + "\", val" + expose + ")",
                        "\tEnd Property",
                        "\tPublic Property Get [" + name + "]", //getter
                        "\tOn Error Resume Next", //必须优先使用set语句,否则它会误将数组当字符串返回
                        "\t\tSet[" + name + "] = [__proxy__](Me,[__data__],\"" + name + "\")",
                        "\tIf Err.Number <> 0 Then",
                        "\t\t[" + name + "] = [__proxy__](Me,[__data__],\"" + name + "\")",
                        "\tEnd If",
                        "\tOn Error Goto 0",
                        "\tEnd Property")

            }

            buffer.push("End Class")
            var body = buffer.join("\r\n")
            var className =VBClassPool[body]   
            if (!className) {
                className = generateID("VBClass")
                window.parseVB("Class " + className + body)
                window.parseVB([
                    "Function " + className + "Factory(a, b)", //创建实例并传入两个关键的参数
                    "\tDim o",
                    "\tSet o = (New " + className + ")(a, b)",
                    "\tSet " + className + "Factory = o",
                    "End Function"
                ].join("\r\n"))
                VBClassPool[body] = className
            }
            var ret = window[className + "Factory"](accessors, VBMediator) //得到其产品
            return ret //得到其产品
        }
    }
}

/*********************************************************************
 *          监控数组（与ms-each, ms-repeat配合使用）                     *
 **********************************************************************/

function arrayFactory(model) {
    var array = []
    array.$id = generateID()
    array.$model = model //数据模型
    array.$events = {}
    array.$events[subscribers] = []
    array._ = modelFactory({
        length: model.length
    })
    array._.$watch("length", function (a, b) {
        array.$fire("length", a, b)
    })
    for (var i in EventBus) {
        array[i] = EventBus[i]
    }
    array.$map = {
        el: 1
    }
    array.$proxy = []
    avalon.mix(array, arrayPrototype)
    return array
}

function mutateArray(method, pos, n, index, method2, pos2, n2) {
    var oldLen = this.length, loop = 2
    while (--loop) {
        switch (method) {
            case "add":
                /* jshint ignore:start */
                var m = pos + n
                var array = this.$model.slice(pos, m).map(function (el) {
                    if (rcomplexType.test(avalon.type(el))) {//转换为VM
                        return el.$id ? el : modelFactory(el, 0, el)
                    } else {
                        return el
                    }
                })
                _splice.apply(this, [pos, 0].concat(array))
                /* jshint ignore:end */
                for (var i = pos; i < m; i++) {//生成代理VM
                    var proxy = eachProxyAgent(i, this)
                    this.$proxy.splice(i, 0, proxy)
                }
                this._fire("add", pos, n)
                break
            case "del":
                var ret = this._splice(pos, n)
                var removed = this.$proxy.splice(pos, n) //回收代理VM
                eachProxyRecycler(removed, "each")
                this._fire("del", pos, n)
                break
        }
        if (method2) {
            method = method2
            pos = pos2
            n = n2
            loop = 2
            method2 = 0
        }
    }
    resetIndex(this.$proxy, index)
    if (this.length !== oldLen) {
        this._.length = this.length
    }
    return ret
}

var _splice = ap.splice
var arrayPrototype = {
    _splice: _splice,
    _fire: function (method, a, b) {
        fireDependencies(this.$events[subscribers], method, a, b)
    },
    size: function () { //取得数组长度，这个函数可以同步视图，length不能
        return this._.length
    },
    pushArray: function (array) {
        var m = array.length, n = this.length
        if (m) {
            ap.push.apply(this.$model, array)
            mutateArray.call(this, "add", n, m, Math.max(0, n - 1))
        }
        return  m + n
    },
    push: function () {
        //http://jsperf.com/closure-with-arguments
        var array = []
        var i, n = arguments.length
        for (i = 0; i < n; i++) {
            array[i] = arguments[i]
        }
        return this.pushArray(array)
    },
    unshift: function () {
        var m = arguments.length, n = this.length
        if (m) {
            ap.unshift.apply(this.$model, arguments)
            mutateArray.call(this, "add", 0, m, 0)
        }
        return  m + n //IE67的unshift不会返回长度
    },
    shift: function () {
        if (this.length) {
            var el = this.$model.shift()
            mutateArray.call(this, "del", 0, 1, 0)
            return el //返回被移除的元素
        }
    },
    pop: function () {
        var n = this.length
        if (n) {
            var el = this.$model.pop()
            mutateArray.call(this, "del", n - 1, 1, Math.max(0, n - 2))
            return el //返回被移除的元素
        }
    },
    splice: function (start) {
        var m = arguments.length, args = [], change
        var removed = _splice.apply(this.$model, arguments)
        if (removed.length) { //如果用户删掉了元素
            args.push("del", start, removed.length, 0)
            change = true
        }
        if (m > 2) {  //如果用户添加了元素
            if (change) {
                args.splice(3, 1, 0, "add", start, m - 2)
            } else {
                args.push("add", start, m - 2, 0)
            }
            change = true
        }
        if (change) { //返回被移除的元素
            return mutateArray.apply(this, args)
        } else {
            return []
        }
    },
    contains: function (el) { //判定是否包含
        return this.indexOf(el) !== -1
    },
    remove: function (el) { //移除第一个等于给定值的元素
        return this.removeAt(this.indexOf(el))
    },
    removeAt: function (index) { //移除指定索引上的元素
        if (index >= 0) {
            this.$model.splice(index, 1)
            return mutateArray.call(this, "del", index, 1, 0)
        }
        return  []
    },
    clear: function () {
        eachProxyRecycler(this.$proxy, "each")
        this.$model.length = this.$proxy.length = this.length = this._.length = 0 //清空数组
        this._fire("clear", 0)
        return this
    },
    removeAll: function (all) { //移除N个元素
        if (Array.isArray(all)) {
            for (var i = this.length - 1; i >= 0; i--) {
                if (all.indexOf(this[i]) !== -1) {
                    this.removeAt(i)
                }
            }
        } else if (typeof all === "function") {
            for (i = this.length - 1; i >= 0; i--) {
                if (all(this[i], i)) {
                    this.removeAt(i)
                }
            }
        } else {
            this.clear()
        }
    },
    ensure: function (el) {
        if (!this.contains(el)) { //只有不存在才push
            this.push(el)
        }
        return this
    },
    set: function (index, val) {
        if (index >= 0) {
            var valueType = avalon.type(val)
            if (val && val.$model) {
                val = val.$model
            }
            var target = this[index]
            if (valueType === "object") {
                for (var i in val) {
                    if (target.hasOwnProperty(i)) {
                        target[i] = val[i]
                    }
                }
            } else if (valueType === "array") {
                target.clear().push.apply(target, val)
            } else if (target !== val) {
                this[index] = val
                this.$model[index] = val
                var proxy = this.$proxy[index]
                if (proxy) {
                    fireDependencies(proxy.$events.$index)
                }
            }
        }
        return this
    }
}
//相当于原来bindingExecutors.repeat 的index分支
function resetIndex(array, pos) {
    var last = array.length - 1
    for (var el; el = array[pos]; pos++) {
        el.$index = pos
        el.$first = pos === 0
        el.$last = pos === last
    }
}

function sortByIndex(array, indexes) {
    var map = {};
    for (var i = 0, n = indexes.length; i < n; i++) {
        map[i] = array[i] // preserve
        var j = indexes[i]
        if (j in map) {
            array[i] = map[j]
            delete map[j]
        } else {
            array[i] = array[j]
        }
    }
}

"sort,reverse".replace(rword, function (method) {
    arrayPrototype[method] = function () {
        var newArray = this.$model//这是要排序的新数组
        var oldArray = newArray.concat() //保持原来状态的旧数组
        var mask = Math.random()
        var indexes = []
        var hasSort
        ap[method].apply(newArray, arguments) //排序
        for (var i = 0, n = oldArray.length; i < n; i++) {
            var neo = newArray[i]
            var old = oldArray[i]
            if (isEqual(neo, old)) {
                indexes.push(i)
            } else {
                var index = oldArray.indexOf(neo)
                indexes.push(index)//得到新数组的每个元素在旧数组对应的位置
                oldArray[index] = mask    //屏蔽已经找过的元素
                hasSort = true
            }
        }
        if (hasSort) {
            sortByIndex(this, indexes)
            sortByIndex(this.$proxy, indexes)
            this._fire("move", indexes)
            resetIndex(this.$proxy, 0)
        }
        return this
    }
})

var eachProxyPool = []

function eachProxyFactory() {
    var source = {
        $index: NaN,
        $first: NaN,
        $last: NaN,
        $map: {},
        $host: {},
        $outer: {},
        $remove: avalon.noop,
        el: {
            get: function () {
                //avalon1.4.4中，计算属性的订阅数组不再添加绑定对象
                return this.$host[this.$index]
            },
            set: function (val) {
                this.$host.set(this.$index, val)
            }
        }
    }

    var second = {
        $last: 1,
        $first: 1,
        $index: 1
    }
    var proxy = modelFactory(source, second)
    proxy.$id = generateID("$proxy$each")
    return proxy
}

function eachProxyAgent(index, host) {
    var proxy = eachProxyPool.shift()
    if (!proxy) {
        proxy = eachProxyFactory( )
    }else{
        proxy.$compute()
    }
    var last = host.length - 1
    proxy.$host = host
    proxy.$index = index
    proxy.$first = index === 0
    proxy.$last = index === last
    proxy.$map = host.$map
    proxy.$remove = function () {
        return host.removeAt(proxy.$index)
    }
    return proxy
}

/*********************************************************************
 *                           依赖调度系统                             *
 **********************************************************************/
//检测两个对象间的依赖关系
var dependencyDetection = (function () {
    var outerFrames = []
    var currentFrame
    return {
        begin: function (accessorObject) {
            //accessorObject为一个拥有callback的对象
            outerFrames.push(currentFrame)
            currentFrame = accessorObject
        },
        end: function () {
            currentFrame = outerFrames.pop()
        },
        collectDependency: function (vmodel, accessor) {
            if (currentFrame) {
                //被dependencyDetection.begin调用
                currentFrame.callback(vmodel, accessor);
            }
        }
    };
})()
//将绑定对象注入到其依赖项的订阅数组中
var ronduplex = /^(duplex|on)$/
avalon.injectBinding = function (data) {
    var fn = data.evaluator
    if (fn) { //如果是求值函数
        dependencyDetection.begin({
            callback: function (vmodel, dependency) {
                injectDependency(vmodel.$events[dependency._name], data)
            }
        })
        try {
            var c = ronduplex.test(data.type) ? data : fn.apply(0, data.args)
            data.handler(c, data.element, data)
        } catch (e) {
            //log("warning:exception throwed in [avalon.injectBinding] " + e)
            delete data.evaluator
            var node = data.element
            if (node.nodeType === 3) {
                var parent = node.parentNode
                if (kernel.commentInterpolate) {
                    parent.replaceChild(DOC.createComment(data.value), node)
                } else {
                    node.data = openTag + data.value + closeTag
                }
            }
        } finally {
            dependencyDetection.end()
        }
    }
}

//将依赖项(比它高层的访问器或构建视图刷新函数的绑定对象)注入到订阅者数组 
function injectDependency(list, data) {
    data = data || Registry[expose]
    if (list && data && avalon.Array.ensure(list, data) && data.element) {
        injectDisposeQueue(data, list)
    }
}

//通知依赖于这个访问器的订阅者更新自身
function fireDependencies(list) {
    if (list && list.length) {
        if (new Date() - beginTime > 444 && typeof list[0] === "object") {
            rejectDisposeQueue()
        }
        var args = aslice.call(arguments, 1)
        for (var i = list.length, fn; fn = list[--i]; ) {
            var el = fn.element
            if (el && el.parentNode) {
                if (fn.$repeat) {
                    fn.handler.apply(fn, args) //处理监控数组的方法
                } else if (fn.type !== "on") { //事件绑定只能由用户触发,不能由程序触发
                    var fun = fn.evaluator || noop
                    fn.handler(fun.apply(0, fn.args || []), el, fn)
                }
            }
        }
    }
}
/*********************************************************************
 *                          定时GC回收机制                             *
 **********************************************************************/
var disposeCount = 0
var disposeQueue = avalon.$$subscribers = []
var beginTime = new Date()
var oldInfo = {}
function getUid(obj) { //IE9+,标准浏览器
    return obj.uniqueNumber || (obj.uniqueNumber = ++disposeCount)
}

//添加到回收列队中
function injectDisposeQueue(data, list) {
    var elem = data.element
    if (!data.uuid) {
        if (elem.nodeType !== 1) {
            data.uuid = data.type + (data.pos || 0) + "-" + getUid(elem.parentNode)
        } else {
            data.uuid = data.name + "-" + getUid(elem)
        }
    }
    var lists = data.lists || (data.lists = [])
    avalon.Array.ensure(lists, list)
    list.$uuid = list.$uuid || generateID()
    if (!disposeQueue[data.uuid]) {
        disposeQueue[data.uuid] = 1
        disposeQueue.push(data)
    }
}

function rejectDisposeQueue(data) {
    if(avalon.optimize)
        return
    var i = disposeQueue.length
    var n = i
    var allTypes = []
    var iffishTypes = {}
    var newInfo = {}
    //对页面上所有绑定对象进行分门别类, 只检测个数发生变化的类型
    while (data = disposeQueue[--i]) {
        var type = data.type
        if (newInfo[type]) {
            newInfo[type]++
        } else {
            newInfo[type] = 1
            allTypes.push(type)
        }
    }
    var diff = false
    allTypes.forEach(function (type) {
        if (oldInfo[type] !== newInfo[type]) {
            iffishTypes[type] = 1
            diff = true
        }
    })
    i = n
    if (diff) {
        while (data = disposeQueue[--i]) {
            if (!data.element)
                continue
            if (iffishTypes[data.type] && shouldDispose(data.element)) { //如果它没有在DOM树
                disposeQueue.splice(i, 1)
                delete disposeQueue[data.uuid]
                var lists = data.lists
                for (var k = 0, list; list = lists[k++]; ) {
                    avalon.Array.remove(lists, list)
                    avalon.Array.remove(list, data)
                }
                disposeData(data)
            }
        }
    }
    oldInfo = newInfo
    beginTime = new Date()
}

function disposeData(data) {
    data.element = null
    data.rollback && data.rollback()
    for (var key in data) {
        data[key] = null
    }
}

function shouldDispose(el) {
    try {//IE下，如果文本节点脱离DOM树，访问parentNode会报错
        if (!el.parentNode) {
            return true
        }
    } catch (e) {
        return true
    }

    return el.msRetain ? 0 : (el.nodeType === 1 ? !root.contains(el) : !avalon.contains(root, el))
}

/************************************************************************
 *            HTML处理(parseHTML, innerHTML, clearHTML)                  *
 ************************************************************************/
// We have to close these tags to support XHTML 
var tagHooks = {
    area: [1, "<map>", "</map>"],
    param: [1, "<object>", "</object>"],
    col: [2, "<table><colgroup>", "</colgroup></table>"],
    legend: [1, "<fieldset>", "</fieldset>"],
    option: [1, "<select multiple='multiple'>", "</select>"],
    thead: [1, "<table>", "</table>"],
    tr: [2, "<table>", "</table>"],
    td: [3, "<table><tr>", "</tr></table>"],
    g: [1, '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1">', '</svg>'],
    //IE6-8在用innerHTML生成节点时，不能直接创建no-scope元素与HTML5的新标签
    _default: W3C ? [0, "", ""] : [1, "X<div>", "</div>"] //div可以不用闭合
}
tagHooks.th = tagHooks.td
tagHooks.optgroup = tagHooks.option
tagHooks.tbody = tagHooks.tfoot = tagHooks.colgroup = tagHooks.caption = tagHooks.thead
String("circle,defs,ellipse,image,line,path,polygon,polyline,rect,symbol,text,use").replace(rword, function (tag) {
    tagHooks[tag] = tagHooks.g //处理SVG
})
var rtagName = /<([\w:]+)/  //取得其tagName
var rxhtml = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/ig
var rcreate = W3C ? /[^\d\D]/ : /(<(?:script|link|style|meta|noscript))/ig
var scriptTypes = oneObject(["", "text/javascript", "text/ecmascript", "application/ecmascript", "application/javascript"])
var rnest = /<(?:tb|td|tf|th|tr|col|opt|leg|cap|area)/ //需要处理套嵌关系的标签
var script = DOC.createElement("script")
var rhtml = /<|&#?\w+;/
avalon.parseHTML = function (html) {
    var fragment = avalonFragment.cloneNode(false)
    if (typeof html !== "string") {
        return fragment
    }
    if (!rhtml.test(html)) {
        fragment.appendChild(DOC.createTextNode(html))
        return fragment
    }
    html = html.replace(rxhtml, "<$1></$2>").trim()
    var tag = (rtagName.exec(html) || ["", ""])[1].toLowerCase(),
            //取得其标签名
            wrap = tagHooks[tag] || tagHooks._default,
            wrapper = cinerator,
            firstChild, neo
    if (!W3C) { //fix IE
        html = html.replace(rcreate, "<br class=msNoScope>$1") //在link style script等标签之前添加一个补丁
    }
    wrapper.innerHTML = wrap[1] + html + wrap[2]
    var els = wrapper.getElementsByTagName("script")
    if (els.length) { //使用innerHTML生成的script节点不会发出请求与执行text属性
        for (var i = 0, el; el = els[i++]; ) {
            if (scriptTypes[el.type]) {
                //以偷龙转凤方式恢复执行脚本功能
                neo = script.cloneNode(false) //FF不能省略参数
                ap.forEach.call(el.attributes, function (attr) {
                    if (attr && attr.specified) {
                        neo[attr.name] = attr.value //复制其属性
                        neo.setAttribute(attr.name, attr.value)
                    }
                })  // jshint ignore:line
                neo.text = el.text
                el.parentNode.replaceChild(neo, el) //替换节点
            }
        }
    }
    if (!W3C) { //fix IE
        var target = wrap[1] === "X<div>" ? wrapper.lastChild.firstChild : wrapper.lastChild
        if (target && target.tagName === "TABLE" && tag !== "tbody") {
            //IE6-7处理 <thead> --> <thead>,<tbody>
            //<tfoot> --> <tfoot>,<tbody>
            //<table> --> <table><tbody></table>
            for (els = target.childNodes, i = 0; el = els[i++]; ) {
                if (el.tagName === "TBODY" && !el.innerHTML) {
                    target.removeChild(el)
                    break
                }
            }
        }
        els = wrapper.getElementsByTagName("br")
        var n = els.length
        while (el = els[--n]) {
            if (el.className === "msNoScope") {
                el.parentNode.removeChild(el)
            }
        }
        for (els = wrapper.all, i = 0; el = els[i++]; ) { //fix VML
            if (isVML(el)) {
                fixVML(el)
            }
        }
    }
    //移除我们为了符合套嵌关系而添加的标签
    for (i = wrap[0]; i--; wrapper = wrapper.lastChild) {
    }
    while (firstChild = wrapper.firstChild) { // 将wrapper上的节点转移到文档碎片上！
        fragment.appendChild(firstChild)
    }
    return fragment
}

function isVML(src) {
    var nodeName = src.nodeName
    return nodeName.toLowerCase() === nodeName && src.scopeName && src.outerText === ""
}

function fixVML(node) {
    if (node.currentStyle.behavior !== "url(#default#VML)") {
        node.style.behavior = "url(#default#VML)"
        node.style.display = "inline-block"
        node.style.zoom = 1 //hasLayout
    }
}
avalon.innerHTML = function (node, html) {
    if (!W3C && (!rcreate.test(html) && !rnest.test(html))) {
        try {
            node.innerHTML = html
            return
        } catch (e) {
        }
    }
    var a = this.parseHTML(html)
    this.clearHTML(node).appendChild(a)
}
avalon.clearHTML = function (node) {
    node.textContent = ""
    while (node.firstChild) {
        node.removeChild(node.firstChild)
    }
    return node
}

/*********************************************************************
 *                  avalon的原型方法定义区                            *
 **********************************************************************/

function hyphen(target) {
    //转换为连字符线风格
    return target.replace(/([a-z\d])([A-Z]+)/g, "$1-$2").toLowerCase()
}

function camelize(target) {
    //提前判断，提高getStyle等的效率
    if (!target || target.indexOf("-") < 0 && target.indexOf("_") < 0) {
        return target
    }
    //转换为驼峰风格
    return target.replace(/[-_][^-_]/g, function(match) {
        return match.charAt(1).toUpperCase()
    })
}

var fakeClassListMethods = {
    _toString: function() {
        var node = this.node
        var cls = node.className
        var str = typeof cls === "string" ? cls : cls.baseVal
        return str.split(/\s+/).join(" ")
    },
    _contains: function(cls) {
        return (" " + this + " ").indexOf(" " + cls + " ") > -1
    },
    _add: function(cls) {
        if (!this.contains(cls)) {
            this._set(this + " " + cls)
        }
    },
    _remove: function(cls) {
        this._set((" " + this + " ").replace(" " + cls + " ", " "))
    },
    __set: function(cls) {
        cls = cls.trim()
        var node = this.node
        if (rsvg.test(node)) {
            //SVG元素的className是一个对象 SVGAnimatedString { baseVal="", animVal=""}，只能通过set/getAttribute操作
            node.setAttribute("class", cls)
        } else {
            node.className = cls
        }
    } //toggle存在版本差异，因此不使用它
}

    function fakeClassList(node) {
        if (!("classList" in node)) {
            node.classList = {
                node: node
            }
            for (var k in fakeClassListMethods) {
                node.classList[k.slice(1)] = fakeClassListMethods[k]
            }
        }
        return node.classList
    }


    "add,remove".replace(rword, function(method) {
        avalon.fn[method + "Class"] = function(cls) {
            var el = this[0]
            //https://developer.mozilla.org/zh-CN/docs/Mozilla/Firefox/Releases/26
            if (cls && typeof cls === "string" && el && el.nodeType === 1) {
                cls.replace(/\S+/g, function(c) {
                    fakeClassList(el)[method](c)
                })
            }
            return this
        }
    })
    avalon.fn.mix({
        hasClass: function(cls) {
            var el = this[0] || {}
            return el.nodeType === 1 && fakeClassList(el).contains(cls)
        },
        toggleClass: function(value, stateVal) {
            var className, i = 0
            var classNames = String(value).split(/\s+/)
            var isBool = typeof stateVal === "boolean"
            while ((className = classNames[i++])) {
                var state = isBool ? stateVal : !this.hasClass(className)
                this[state ? "addClass" : "removeClass"](className)
            }
            return this
        },
        attr: function(name, value) {
            if (arguments.length === 2) {
                this[0].setAttribute(name, value)
                return this
            } else {
                return this[0].getAttribute(name)
            }
        },
        data: function(name, value) {
            name = "data-" + hyphen(name || "")
            switch (arguments.length) {
                case 2:
                    this.attr(name, value)
                    return this
                case 1:
                    var val = this.attr(name)
                    return parseData(val)
                case 0:
                    var ret = {}
                    ap.forEach.call(this[0].attributes, function(attr) {
                        if (attr) {
                            name = attr.name
                            if (!name.indexOf("data-")) {
                                name = camelize(name.slice(5))
                                ret[name] = parseData(attr.value)
                            }
                        }
                    })
                    return ret
            }
        },
        removeData: function(name) {
            name = "data-" + hyphen(name)
            this[0].removeAttribute(name)
            return this
        },
        css: function(name, value) {
            if (avalon.isPlainObject(name)) {
                for (var i in name) {
                    avalon.css(this, i, name[i])
                }
            } else {
                var ret = avalon.css(this, name, value)
            }
            return ret !== void 0 ? ret : this
        },
        position: function() {
            var offsetParent, offset,
                elem = this[0],
                parentOffset = {
                    top: 0,
                    left: 0
                }
            if (!elem) {
                return
            }
            if (this.css("position") === "fixed") {
                offset = elem.getBoundingClientRect()
            } else {
                offsetParent = this.offsetParent() //得到真正的offsetParent
                offset = this.offset() // 得到正确的offsetParent
                if (offsetParent[0].tagName !== "HTML") {
                    parentOffset = offsetParent.offset()
                }
                parentOffset.top += avalon.css(offsetParent[0], "borderTopWidth", true)
                parentOffset.left += avalon.css(offsetParent[0], "borderLeftWidth", true)

                // Subtract offsetParent scroll positions
                parentOffset.top -= offsetParent.scrollTop()
                parentOffset.left -= offsetParent.scrollLeft()
            }
            return {
                top: offset.top - parentOffset.top - avalon.css(elem, "marginTop", true),
                left: offset.left - parentOffset.left - avalon.css(elem, "marginLeft", true)
            }
        },
        offsetParent: function() {
            var offsetParent = this[0].offsetParent
            while (offsetParent && avalon.css(offsetParent, "position") === "static") {
                offsetParent = offsetParent.offsetParent;
            }
            return avalon(offsetParent || root)
        },
        bind: function(type, fn, phase) {
            if (this[0]) { //此方法不会链
                return avalon.bind(this[0], type, fn, phase)
            }
        },
        unbind: function(type, fn, phase) {
            if (this[0]) {
                avalon.unbind(this[0], type, fn, phase)
            }
            return this
        },
        val: function(value) {
            var node = this[0]
            if (node && node.nodeType === 1) {
                var get = arguments.length === 0
                var access = get ? ":get" : ":set"
                var fn = valHooks[getValType(node) + access]
                if (fn) {
                    var val = fn(node, value)
                } else if (get) {
                    return (node.value || "").replace(/\r/g, "")
                } else {
                    node.value = value
                }
            }
            return get ? val : this
        }
    })

    function parseData(data) {
        try {
            if (typeof data === "object")
                return data
            data = data === "true" ? true :
                data === "false" ? false :
                data === "null" ? null : +data + "" === data ? +data : rbrace.test(data) ? avalon.parseJSON(data) : data
        } catch (e) {}
        return data
    }
var rbrace = /(?:\{[\s\S]*\}|\[[\s\S]*\])$/,
    rvalidchars = /^[\],:{}\s]*$/,
    rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g,
    rvalidescape = /\\(?:["\\\/bfnrt]|u[\da-fA-F]{4})/g,
    rvalidtokens = /"[^"\\\r\n]*"|true|false|null|-?(?:\d+\.|)\d+(?:[eE][+-]?\d+|)/g
avalon.parseJSON = window.JSON ? JSON.parse : function(data) {
    if (typeof data === "string") {
        data = data.trim();
        if (data) {
            if (rvalidchars.test(data.replace(rvalidescape, "@")
                .replace(rvalidtokens, "]")
                .replace(rvalidbraces, ""))) {
                return (new Function("return " + data))() // jshint ignore:line
            }
        }
        avalon.error("Invalid JSON: " + data)
    }
    return data
}

//生成avalon.fn.scrollLeft, avalon.fn.scrollTop方法
avalon.each({
    scrollLeft: "pageXOffset",
    scrollTop: "pageYOffset"
}, function(method, prop) {
    avalon.fn[method] = function(val) {
        var node = this[0] || {}, win = getWindow(node),
            top = method === "scrollTop"
        if (!arguments.length) {
            return win ? (prop in win) ? win[prop] : root[method] : node[method]
        } else {
            if (win) {
                win.scrollTo(!top ? val : avalon(win).scrollLeft(), top ? val : avalon(win).scrollTop())
            } else {
                node[method] = val
            }
        }
    }
})

function getWindow(node) {
    return node.window && node.document ? node : node.nodeType === 9 ? node.defaultView || node.parentWindow : false;
}
//=============================css相关=======================
var cssHooks = avalon.cssHooks = {}
var prefixes = ["", "-webkit-", "-o-", "-moz-", "-ms-"]
var cssMap = {
    "float": W3C ? "cssFloat" : "styleFloat"
}
avalon.cssNumber = oneObject("columnCount,order,fillOpacity,fontWeight,lineHeight,opacity,orphans,widows,zIndex,zoom")

avalon.cssName = function(name, host, camelCase) {
    if (cssMap[name]) {
        return cssMap[name]
    }
    host = host || root.style
    for (var i = 0, n = prefixes.length; i < n; i++) {
        camelCase = camelize(prefixes[i] + name)
        if (camelCase in host) {
            return (cssMap[name] = camelCase)
        }
    }
    return null
}
cssHooks["@:set"] = function(node, name, value) {
    try { //node.style.width = NaN;node.style.width = "xxxxxxx";node.style.width = undefine 在旧式IE下会抛异常
        node.style[name] = value
    } catch (e) {}
}
if (window.getComputedStyle) {
    cssHooks["@:get"] = function(node, name) {
        if (!node || !node.style) {
            throw new Error("getComputedStyle要求传入一个节点 " + node)
        }
        var ret, styles = getComputedStyle(node, null)
            if (styles) {
                ret = name === "filter" ? styles.getPropertyValue(name) : styles[name]
                if (ret === "") {
                    ret = node.style[name] //其他浏览器需要我们手动取内联样式
                }
            }
        return ret
    }
    cssHooks["opacity:get"] = function(node) {
        var ret = cssHooks["@:get"](node, "opacity")
        return ret === "" ? "1" : ret
    }
} else {
    var rnumnonpx = /^-?(?:\d*\.)?\d+(?!px)[^\d\s]+$/i
    var rposition = /^(top|right|bottom|left)$/
    var ralpha = /alpha\([^)]*\)/i
    var ie8 = !! window.XDomainRequest
    var salpha = "DXImageTransform.Microsoft.Alpha"
    var border = {
        thin: ie8 ? '1px' : '2px',
        medium: ie8 ? '3px' : '4px',
        thick: ie8 ? '5px' : '6px'
    }
    cssHooks["@:get"] = function(node, name) {
        //取得精确值，不过它有可能是带em,pc,mm,pt,%等单位
        var currentStyle = node.currentStyle
        var ret = currentStyle[name]
        if ((rnumnonpx.test(ret) && !rposition.test(ret))) {
            //①，保存原有的style.left, runtimeStyle.left,
            var style = node.style,
                left = style.left,
                rsLeft = node.runtimeStyle.left
                //②由于③处的style.left = xxx会影响到currentStyle.left，
                //因此把它currentStyle.left放到runtimeStyle.left，
                //runtimeStyle.left拥有最高优先级，不会style.left影响
                node.runtimeStyle.left = currentStyle.left
                //③将精确值赋给到style.left，然后通过IE的另一个私有属性 style.pixelLeft
                //得到单位为px的结果；fontSize的分支见http://bugs.jquery.com/ticket/760
                style.left = name === 'fontSize' ? '1em' : (ret || 0)
                ret = style.pixelLeft + "px"
                //④还原 style.left，runtimeStyle.left
            style.left = left
            node.runtimeStyle.left = rsLeft
        }
        if (ret === "medium") {
            name = name.replace("Width", "Style")
            //border width 默认值为medium，即使其为0"
            if (currentStyle[name] === "none") {
                ret = "0px"
            }
        }
        return ret === "" ? "auto" : border[ret] || ret
    }
    cssHooks["opacity:set"] = function(node, name, value) {
        var style = node.style
        var opacity = isFinite(value) && value <= 1 ? "alpha(opacity=" + value * 100 + ")" : ""
        var filter = style.filter || "";
        style.zoom = 1
        //不能使用以下方式设置透明度
        //node.filters.alpha.opacity = value * 100
        style.filter = (ralpha.test(filter) ?
            filter.replace(ralpha, opacity) :
            filter + " " + opacity).trim()
        if (!style.filter) {
            style.removeAttribute("filter")
        }
    }
    cssHooks["opacity:get"] = function(node) {
        //这是最快的获取IE透明值的方式，不需要动用正则了！
        var alpha = node.filters.alpha || node.filters[salpha],
            op = alpha && alpha.enabled ? alpha.opacity : 100
        return (op / 100) + "" //确保返回的是字符串
    }
}

"top,left".replace(rword, function(name) {
    cssHooks[name + ":get"] = function(node) {
        var computed = cssHooks["@:get"](node, name)
        return /px$/.test(computed) ? computed :
            avalon(node).position()[name] + "px"
    }
})

var cssShow = {
    position: "absolute",
    visibility: "hidden",
    display: "block"
}

var rdisplayswap = /^(none|table(?!-c[ea]).+)/

    function showHidden(node, array) {
        //http://www.cnblogs.com/rubylouvre/archive/2012/10/27/2742529.html
        if (node.offsetWidth <= 0) { //opera.offsetWidth可能小于0
            if (rdisplayswap.test(cssHooks["@:get"](node, "display"))) {
                var obj = {
                    node: node
                }
                for (var name in cssShow) {
                    obj[name] = node.style[name]
                    node.style[name] = cssShow[name]
                }
                array.push(obj)
            }
            var parent = node.parentNode
            if (parent && parent.nodeType === 1) {
                showHidden(parent, array)
            }
        }
    }
    "Width,Height".replace(rword, function(name) { //fix 481
        var method = name.toLowerCase(),
            clientProp = "client" + name,
            scrollProp = "scroll" + name,
            offsetProp = "offset" + name
            cssHooks[method + ":get"] = function(node, which, override) {
                var boxSizing = -4
                if (typeof override === "number") {
                    boxSizing = override
                }
                which = name === "Width" ? ["Left", "Right"] : ["Top", "Bottom"]
                var ret = node[offsetProp] // border-box 0
                if (boxSizing === 2) { // margin-box 2
                    return ret + avalon.css(node, "margin" + which[0], true) + avalon.css(node, "margin" + which[1], true)
                }
                if (boxSizing < 0) { // padding-box  -2
                    ret = ret - avalon.css(node, "border" + which[0] + "Width", true) - avalon.css(node, "border" + which[1] + "Width", true)
                }
                if (boxSizing === -4) { // content-box -4
                    ret = ret - avalon.css(node, "padding" + which[0], true) - avalon.css(node, "padding" + which[1], true)
                }
                return ret
            }
        cssHooks[method + "&get"] = function(node) {
            var hidden = [];
            showHidden(node, hidden);
            var val = cssHooks[method + ":get"](node)
            for (var i = 0, obj; obj = hidden[i++];) {
                node = obj.node
                for (var n in obj) {
                    if (typeof obj[n] === "string") {
                        node.style[n] = obj[n]
                    }
                }
            }
            return val;
        }
        avalon.fn[method] = function(value) { //会忽视其display
            var node = this[0]
            if (arguments.length === 0) {
                if (node.setTimeout) { //取得窗口尺寸,IE9后可以用node.innerWidth /innerHeight代替
                    return node["inner" + name] || node.document.documentElement[clientProp]
                }
                if (node.nodeType === 9) { //取得页面尺寸
                    var doc = node.documentElement
                    //FF chrome    html.scrollHeight< body.scrollHeight
                    //IE 标准模式 : html.scrollHeight> body.scrollHeight
                    //IE 怪异模式 : html.scrollHeight 最大等于可视窗口多一点？
                    return Math.max(node.body[scrollProp], doc[scrollProp], node.body[offsetProp], doc[offsetProp], doc[clientProp])
                }
                return cssHooks[method + "&get"](node)
            } else {
                return this.css(method, value)
            }
        }
        avalon.fn["inner" + name] = function() {
            return cssHooks[method + ":get"](this[0], void 0, -2)
        }
        avalon.fn["outer" + name] = function(includeMargin) {
            return cssHooks[method + ":get"](this[0], void 0, includeMargin === true ? 2 : 0)
        }
    })
    avalon.fn.offset = function() { //取得距离页面左右角的坐标
        var node = this[0],
            box = {
                left: 0,
                top: 0
            }
        if (!node || !node.tagName || !node.ownerDocument) {
            return box
        }
        var doc = node.ownerDocument,
            body = doc.body,
            root = doc.documentElement,
            win = doc.defaultView || doc.parentWindow
        if (!avalon.contains(root, node)) {
            return box
        }
        //http://hkom.blog1.fc2.com/?mode=m&no=750 body的偏移量是不包含margin的
        //我们可以通过getBoundingClientRect来获得元素相对于client的rect.
        //http://msdn.microsoft.com/en-us/library/ms536433.aspx
        if (node.getBoundingClientRect) {
            box = node.getBoundingClientRect() // BlackBerry 5, iOS 3 (original iPhone)
        }
        //chrome/IE6: body.scrollTop, firefox/other: root.scrollTop
        var clientTop = root.clientTop || body.clientTop,
            clientLeft = root.clientLeft || body.clientLeft,
            scrollTop = Math.max(win.pageYOffset || 0, root.scrollTop, body.scrollTop),
            scrollLeft = Math.max(win.pageXOffset || 0, root.scrollLeft, body.scrollLeft)
            // 把滚动距离加到left,top中去。
            // IE一些版本中会自动为HTML元素加上2px的border，我们需要去掉它
            // http://msdn.microsoft.com/en-us/library/ms533564(VS.85).aspx
            return {
                top: box.top + scrollTop - clientTop,
                left: box.left + scrollLeft - clientLeft
            }
    }

    //==================================val相关============================

    function getValType(elem) {
        var ret = elem.tagName.toLowerCase()
        return ret === "input" && /checkbox|radio/.test(elem.type) ? "checked" : ret
    }
var roption = /^<option(?:\s+\w+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s>]+))?)*\s+value[\s=]/i
var valHooks = {
    "option:get": IEVersion ? function(node) {
        //在IE11及W3C，如果没有指定value，那么node.value默认为node.text（存在trim作），但IE9-10则是取innerHTML(没trim操作)
        //specified并不可靠，因此通过分析outerHTML判定用户有没有显示定义value
        return roption.test(node.outerHTML) ? node.value : node.text.trim()
    } : function(node) {
        return node.value
    },
    "select:get": function(node, value) {
        var option, options = node.options,
            index = node.selectedIndex,
            getter = valHooks["option:get"],
            one = node.type === "select-one" || index < 0,
            values = one ? null : [],
            max = one ? index + 1 : options.length,
            i = index < 0 ? max : one ? index : 0
        for (; i < max; i++) {
            option = options[i]
            //旧式IE在reset后不会改变selected，需要改用i === index判定
            //我们过滤所有disabled的option元素，但在safari5下，如果设置select为disable，那么其所有孩子都disable
            //因此当一个元素为disable，需要检测其是否显式设置了disable及其父节点的disable情况
            if ((option.selected || i === index) && !option.disabled) {
                value = getter(option)
                if (one) {
                    return value
                }
                //收集所有selected值组成数组返回
                values.push(value)
            }
        }
        return values
    },
    "select:set": function(node, values, optionSet) {
        values = [].concat(values) //强制转换为数组
        var getter = valHooks["option:get"]
        for (var i = 0, el; el = node.options[i++];) {
            if ((el.selected = values.indexOf(getter(el)) > -1)) {
                optionSet = true
            }
        }
        if (!optionSet) {
            node.selectedIndex = -1
        }
    }
}

/*********************************************************************
 *                          编译系统                                  *
 **********************************************************************/
var meta = {
    '\b': '\\b',
    '\t': '\\t',
    '\n': '\\n',
    '\f': '\\f',
    '\r': '\\r',
    '"': '\\"',
    '\\': '\\\\'
}
var quote = window.JSON && JSON.stringify || function(str) {
    return '"' + str.replace(/[\\\"\x00-\x1f]/g, function(a) {
        var c = meta[a];
        return typeof c === 'string' ? c :
                '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
    }) + '"'
}

var keywords = [
    "break,case,catch,continue,debugger,default,delete,do,else,false",
    "finally,for,function,if,in,instanceof,new,null,return,switch,this",
    "throw,true,try,typeof,var,void,while,with", /* 关键字*/
    "abstract,boolean,byte,char,class,const,double,enum,export,extends",
    "final,float,goto,implements,import,int,interface,long,native",
    "package,private,protected,public,short,static,super,synchronized",
    "throws,transient,volatile", /*保留字*/
    "arguments,let,yield,undefined" /* ECMA 5 - use strict*/].join(",")
var rrexpstr = /\/\*[\w\W]*?\*\/|\/\/[^\n]*\n|\/\/[^\n]*$|"(?:[^"\\]|\\[\w\W])*"|'(?:[^'\\]|\\[\w\W])*'|[\s\t\n]*\.[\s\t\n]*[$\w\.]+/g
var rsplit = /[^\w$]+/g
var rkeywords = new RegExp(["\\b" + keywords.replace(/,/g, '\\b|\\b') + "\\b"].join('|'), 'g')
var rnumber = /\b\d[^,]*/g
var rcomma = /^,+|,+$/g
var variablePool = new Cache(512)
var getVariables = function (code) {
    var key = "," + code.trim()
    var ret = variablePool.get(key)
    if (ret) {
        return ret
    }
    var match = code
            .replace(rrexpstr, "")
            .replace(rsplit, ",")
            .replace(rkeywords, "")
            .replace(rnumber, "")
            .replace(rcomma, "")
            .split(/^$|,+/)
    return variablePool.put(key, uniqSet(match))
}
/*添加赋值语句*/

function addAssign(vars, scope, name, data) {
    var ret = [],
            prefix = " = " + name + "."
    var isProxy = /\$proxy\$each/.test(scope.$id)
    for (var i = vars.length, prop; prop = vars[--i]; ) {
        var el = isProxy && scope.$map[prop] ? "el" : prop
        if (scope.hasOwnProperty(el)) {
            ret.push(prop + prefix + el)
            data.vars.push(prop)
            if (data.type === "duplex") {
                vars.get = name + "." + el
            }
            vars.splice(i, 1)
        }
    }
    return ret
}

function uniqSet(array) {
    var ret = [],
            unique = {}
    for (var i = 0; i < array.length; i++) {
        var el = array[i]
        var id = el && typeof el.$id === "string" ? el.$id : el
        if (!unique[id]) {
            unique[id] = ret.push(el)
        }
    }
    return ret
}
//缓存求值函数，以便多次利用
var evaluatorPool = new Cache(128)
//取得求值函数及其传参
var rduplex = /\w\[.*\]|\w\.\w/
var rproxy = /(\$proxy\$[a-z]+)\d+$/
var rthimRightParentheses = /\)\s*$/
var rthimOtherParentheses = /\)\s*\|/g
var rquoteFilterName = /\|\s*([$\w]+)/g
var rpatchBracket = /"\s*\["/g
var rthimLeftParentheses = /"\s*\(/g
function parseFilter(val, filters) {
    filters = filters
            .replace(rthimRightParentheses, "")//处理最后的小括号
            .replace(rthimOtherParentheses, function () {//处理其他小括号
                return "],|"
            })
            .replace(rquoteFilterName, function (a, b) { //处理|及它后面的过滤器的名字
                return "[" + quote(b)
            })
            .replace(rpatchBracket, function () {
                return '"],["'
            })
            .replace(rthimLeftParentheses, function () {
                return '",'
            }) + "]"
    return  "return avalon.filters.$filter(" + val + ", " + filters + ")"
}

function parseExpr(code, scopes, data) {
    var dataType = data.type
    var filters = data.filters || ""
    var exprId = scopes.map(function (el) {
        return String(el.$id).replace(rproxy, "$1")
    }) + code + dataType + filters
    var vars = getVariables(code).concat(),
            assigns = [],
            names = [],
            args = [],
            prefix = ""
    //args 是一个对象数组， names 是将要生成的求值函数的参数
    scopes = uniqSet(scopes)
    data.vars = []
    for (var i = 0, sn = scopes.length; i < sn; i++) {
        if (vars.length) {
            var name = "vm" + expose + "_" + i
            names.push(name)
            args.push(scopes[i])
            assigns.push.apply(assigns, addAssign(vars, scopes[i], name, data))
        }
    }
    if (!assigns.length && dataType === "duplex") {
        return
    }
    if (dataType !== "duplex" && (code.indexOf("||") > -1 || code.indexOf("&&") > -1)) {
        //https://github.com/RubyLouvre/avalon/issues/583
        data.vars.forEach(function (v) {
            var reg = new RegExp("\\b" + v + "(?:\\.\\w+|\\[\\w+\\])+", "ig")
            code = code.replace(reg, function (_) {
                var c = _.charAt(v.length)
                var r = IEVersion ? code.slice(arguments[1] + _.length) : RegExp.rightContext
                var method = /^\s*\(/.test(r)
                if (c === "." || c === "[" || method) {//比如v为aa,我们只匹配aa.bb,aa[cc],不匹配aaa.xxx
                    var name = "var" + String(Math.random()).replace(/^0\./, "")
                    if (method) {//array.size()
                        var array = _.split(".")
                        if (array.length > 2) {
                            var last = array.pop()
                            assigns.push(name + " = " + array.join("."))
                            return name + "." + last
                        } else {
                            return _
                        }
                    }
                    assigns.push(name + " = " + _)
                    return name
                } else {
                    return _
                }
            })
        })
    }
    //---------------args----------------
    data.args = args
    //---------------cache----------------
    delete data.vars
    var fn = evaluatorPool.get(exprId) //直接从缓存，免得重复生成
    if (fn) {
        data.evaluator = fn
        return
    }
    prefix = assigns.join(", ")
    if (prefix) {
        prefix = "var " + prefix
    }
    if (/\S/.test(filters)) { //文本绑定，双工绑定才有过滤器
        if (!/text|html/.test(data.type)) {
            throw Error("ms-" + data.type + "不支持过滤器")
        }
        code = "\nvar ret" + expose + " = " + code + ";\r\n"
        code += parseFilter("ret" + expose, filters)
    } else if (dataType === "duplex") { //双工绑定
        var _body = "'use strict';\nreturn function(vvv){\n\t" +
                prefix +
                ";\n\tif(!arguments.length){\n\t\treturn " +
                code +
                "\n\t}\n\t" + (!rduplex.test(code) ? vars.get : code) +
                "= vvv;\n} "
        try {
            fn = Function.apply(noop, names.concat(_body))
            data.evaluator = evaluatorPool.put(exprId, fn)
        } catch (e) {
            log("debug: parse error," + e.message)
        }
        return
    } else if (dataType === "on") { //事件绑定
        if (code.indexOf("(") === -1) {
            code += ".call(this, $event)"
        } else {
            code = code.replace("(", ".call(this,")
        }
        names.push("$event")
        code = "\nreturn " + code + ";" //IE全家 Function("return ")出错，需要Function("return ;")
        var lastIndex = code.lastIndexOf("\nreturn")
        var header = code.slice(0, lastIndex)
        var footer = code.slice(lastIndex)
        code = header + "\n" + footer
    } else { //其他绑定
        code = "\nreturn " + code + ";" //IE全家 Function("return ")出错，需要Function("return ;")
    }
    try {
        fn = Function.apply(noop, names.concat("'use strict';\n" + prefix + code))
        data.evaluator = evaluatorPool.put(exprId, fn)
    } catch (e) {
        log("debug: parse error," + e.message)
    } finally {
        vars = assigns = names = null //释放内存
    }
}


//parseExpr的智能引用代理

function parseExprProxy(code, scopes, data, tokens, noRegister) {
    if (Array.isArray(tokens)) {
        code = tokens.map(function (el) {
            return el.expr ? "(" + el.value + ")" : quote(el.value)
        }).join(" + ")
    }
    parseExpr(code, scopes, data)
    if (data.evaluator && !noRegister) {
        data.handler = bindingExecutors[data.handlerName || data.type]
        //方便调试
        //这里非常重要,我们通过判定视图刷新函数的element是否在DOM树决定
        //将它移出订阅者列表
        avalon.injectBinding(data)
    }
}
avalon.parseExprProxy = parseExprProxy
/*********************************************************************
 *                           扫描系统                                 *
 **********************************************************************/

avalon.scan = function(elem, vmodel) {
    elem = elem || root
    var vmodels = vmodel ? [].concat(vmodel) : []
    scanTag(elem, vmodels)
}

//http://www.w3.org/TR/html5/syntax.html#void-elements
var stopScan = oneObject("area,base,basefont,br,col,command,embed,hr,img,input,link,meta,param,source,track,wbr,noscript,script,style,textarea".toUpperCase())

function checkScan(elem, callback, innerHTML) {
    var id = setTimeout(function() {
        var currHTML = elem.innerHTML
        clearTimeout(id)
        if (currHTML === innerHTML) {
            callback()
        } else {
            checkScan(elem, callback, currHTML)
        }
    })
}


function createSignalTower(elem, vmodel) {
    var id = elem.getAttribute("avalonctrl") || vmodel.$id
    elem.setAttribute("avalonctrl", id)
    vmodel.$events.expr = elem.tagName + '[avalonctrl="' + id + '"]'
}

var getBindingCallback = function(elem, name, vmodels) {
    var callback = elem.getAttribute(name)
    if (callback) {
        for (var i = 0, vm; vm = vmodels[i++]; ) {
            if (vm.hasOwnProperty(callback) && typeof vm[callback] === "function") {
                return vm[callback]
            }
        }
    }
}

function executeBindings(bindings, vmodels) {
    for (var i = 0, data; data = bindings[i++]; ) {
        data.vmodels = vmodels
        bindingHandlers[data.type](data, vmodels)
        if (data.evaluator && data.element && data.element.nodeType === 1) { //移除数据绑定，防止被二次解析
            //chrome使用removeAttributeNode移除不存在的特性节点时会报错 https://github.com/RubyLouvre/avalon/issues/99
            data.element.removeAttribute(data.name)
        }
    }
    bindings.length = 0
}

//https://github.com/RubyLouvre/avalon/issues/636
var mergeTextNodes = IEVersion && window.MutationObserver ? function (elem) {
    var node = elem.firstChild, text
    while (node) {
        var aaa = node.nextSibling
        if (node.nodeType === 3) {
            if (text) {
                text.nodeValue += node.nodeValue
                elem.removeChild(node)
            } else {
                text = node
            }
        } else {
            text = null
        }
        node = aaa
    }
} : 0

var rmsAttr = /ms-(\w+)-?(.*)/
var priorityMap = {
    "if": 10,
    "repeat": 90,
    "data": 100,
    "widget": 110,
    "each": 1400,
    "with": 1500,
    "duplex": 2000,
    "on": 3000
}

var events = oneObject("animationend,blur,change,input,click,dblclick,focus,keydown,keypress,keyup,mousedown,mouseenter,mouseleave,mousemove,mouseout,mouseover,mouseup,scan,scroll,submit")
var obsoleteAttrs = oneObject("value,title,alt,checked,selected,disabled,readonly,enabled")
function bindingSorter(a, b) {
    return a.priority - b.priority
}

function scanAttr(elem, vmodels, match) {
    var scanNode = true
    if (vmodels.length) {
        var attributes = getAttributes ? getAttributes(elem) : elem.attributes
        var bindings = []
        var fixAttrs = []
        var msData = {}
        for (var i = 0, attr; attr = attributes[i++]; ) {
            if (attr.specified) {
                if (match = attr.name.match(rmsAttr)) {
                    //如果是以指定前缀命名的
                    var type = match[1]
                    var param = match[2] || ""
                    var value = attr.value
                    var name = attr.name
                    if (events[type]) {
                        param = type
                        type = "on"
                    } else if (obsoleteAttrs[type]) {
                        if (type === "enabled") {//吃掉ms-enabled绑定,用ms-disabled代替
                            log("warning!ms-enabled或ms-attr-enabled已经被废弃")
                            type = "disabled"
                            value = "!(" + value + ")"
                        }
                        param = type
                        type = "attr"
                        name = "ms-" + type + "-"+ param
                        fixAttrs.push([attr.name, name, value])
                    }
                    msData[name] = value
                    if (typeof bindingHandlers[type] === "function") {
                        var binding = {
                            type: type,
                            param: param,
                            element: elem,
                            name: name,
                            value: value,
                             //chrome与firefox下Number(param)得到的值不一样 #855
                            priority:  (priorityMap[type] || type.charCodeAt(0) * 10 )+ (Number(param.replace(/\D/g, "")) || 0)
                        }
                        if (type === "html" || type === "text") {
                            var token = getToken(value)
                            avalon.mix(binding, token)
                            binding.filters = binding.filters.replace(rhasHtml, function () {
                                binding.type = "html"
                                binding.group = 1
                                return ""
                            })// jshint ignore:line
                        } else if (type === "duplex") {
                            var hasDuplex = name
                        } else if (name === "ms-if-loop") {
                            binding.priority += 100
                        }
                        bindings.push(binding)
                        if (type === "widget") {
                            elem.msData = elem.msData || msData
                        }
                    }
                }
            }
        }
        if (bindings.length) {
            bindings.sort(bindingSorter)
            fixAttrs.forEach(function (arr) {
                log("warning!请改用" + arr[1] + "代替" + arr[0] + "!")
                elem.removeAttribute(arr[0])
                elem.setAttribute(arr[1], arr[2])
            })
            //http://bugs.jquery.com/ticket/7071
            //在IE下对VML读取type属性,会让此元素所有属性都变成<Failed>
            if (hasDuplex) {
                if (msData["ms-attr-checked"]) {
                    log("warning!一个控件不能同时定义ms-attr-checked与" + hasDuplex)
                }
                if (msData["ms-attr-value"]) {
                    log("warning!一个控件不能同时定义ms-attr-value与" + hasDuplex)
                }
            }
            for (i = 0; binding = bindings[i]; i++) {
                type = binding.type
                if (rnoscanAttrBinding.test(type)) {
                    return executeBindings(bindings.slice(0, i + 1), vmodels)
                } else if (scanNode) {
                    scanNode = !rnoscanNodeBinding.test(type)
                }
            }
            executeBindings(bindings, vmodels)
        }
    }
    if (scanNode && !stopScan[elem.tagName] && rbind.test(elem.innerHTML.replace(rlt, "<").replace(rgt, ">"))) {
        mergeTextNodes && mergeTextNodes(elem)
        scanNodeList(elem, vmodels) //扫描子孙元素
    }
}

var rnoscanAttrBinding = /^if|widget|repeat$/
var rnoscanNodeBinding = /^each|with|html|include$/
//IE67下，在循环绑定中，一个节点如果是通过cloneNode得到，自定义属性的specified为false，无法进入里面的分支，
//但如果我们去掉scanAttr中的attr.specified检测，一个元素会有80+个特性节点（因为它不区分固有属性与自定义属性），很容易卡死页面
if (!"1" [0]) {
    var attrPool = new Cache(512)
    var rattrs = /\s+(ms-[^=\s]+)(?:=("[^"]*"|'[^']*'|[^\s>]+))?/g,
            rquote = /^['"]/,
            rtag = /<\w+\b(?:(["'])[^"]*?(\1)|[^>])*>/i,
            ramp = /&amp;/g
    //IE6-8解析HTML5新标签，会将它分解两个元素节点与一个文本节点
    //<body><section>ddd</section></body>
    //        window.onload = function() {
    //            var body = document.body
    //            for (var i = 0, el; el = body.children[i++]; ) {
    //                avalon.log(el.outerHTML)
    //            }
    //        }
    //依次输出<SECTION>, </SECTION>
    var getAttributes = function (elem) {
        var html = elem.outerHTML
        //处理IE6-8解析HTML5新标签的情况，及<br>等半闭合标签outerHTML为空的情况
        if (html.slice(0, 2) === "</" || !html.trim()) {
            return []
        }
        var str = html.match(rtag)[0]
        var attributes = [],
                match,
                k, v
        var ret = attrPool.get(str)
        if (ret) {
            return ret
        }
        while (k = rattrs.exec(str)) {
            v = k[2]
            if (v) {
                v = (rquote.test(v) ? v.slice(1, -1) : v).replace(ramp, "&")
            }
            var name = k[1].toLowerCase()
            match = name.match(rmsAttr)
            var binding = {
                name: name,
                specified: true,
                value: v || ""
            }
            attributes.push(binding)
        }
        return attrPool.put(str, attributes)
    }
}

//function scanNodeList(parent, vmodels) {
//    var node = parent.firstChild
//    while (node) {
//        var nextNode = node.nextSibling
//        scanNode(node, node.nodeType, vmodels)
//        node = nextNode
//    }
//}
function scanNodeList(parent, vmodels) {
    var nodes = avalon.slice(parent.childNodes)
    scanNodeArray(nodes, vmodels)
}

function scanNodeArray(nodes, vmodels) {
    for (var i = 0, node; node = nodes[i++]; ) {
        scanNode(node, node.nodeType, vmodels)
    }
}
function scanNode(node, nodeType, vmodels) {
    if (nodeType === 1) {
        scanTag(node, vmodels) //扫描元素节点
        if( node.msCallback){
            node.msCallback()
            node.msCallback = void 0
       }
    } else if (nodeType === 3 && rexpr.test(node.data)){
        scanText(node, vmodels) //扫描文本节点
    } else if (kernel.commentInterpolate && nodeType === 8 && !rexpr.test(node.nodeValue)) {
        scanText(node, vmodels) //扫描注释节点
    }
}
function scanTag(elem, vmodels, node) {
    //扫描顺序  ms-skip(0) --> ms-important(1) --> ms-controller(2) --> ms-if(10) --> ms-repeat(100) 
    //--> ms-if-loop(110) --> ms-attr(970) ...--> ms-each(1400)-->ms-with(1500)--〉ms-duplex(2000)垫后
    var a = elem.getAttribute("ms-skip")
    //#360 在旧式IE中 Object标签在引入Flash等资源时,可能出现没有getAttributeNode,innerHTML的情形
    if (!elem.getAttributeNode) {
        return log("warning " + elem.tagName + " no getAttributeNode method")
    }
    var b = elem.getAttributeNode("ms-important")
    var c = elem.getAttributeNode("ms-controller")
    if (typeof a === "string") {
        return
    } else if (node = b || c) {
        var newVmodel = avalon.vmodels[node.value]
        if (!newVmodel) {
            return
        }
        //ms-important不包含父VM，ms-controller相反
        vmodels = node === b ? [newVmodel] : [newVmodel].concat(vmodels)
        var name = node.name
        elem.removeAttribute(name) //removeAttributeNode不会刷新[ms-controller]样式规则
        avalon(elem).removeClass(name)
        createSignalTower(elem, newVmodel)
    }
    scanAttr(elem, vmodels) //扫描特性节点
}
var rhasHtml = /\|\s*html\s*/,
        r11a = /\|\|/g,
        rlt = /&lt;/g,
        rgt = /&gt;/g,
        rstringLiteral  = /(['"])(\\\1|.)+?\1/g
function getToken(value, pos) {
    if (value.indexOf("|") > 0) {
        var scapegoat = value.replace( rstringLiteral, function(_){
            return Array(_.length+1).join("1")// jshint ignore:line
        })
        var index = scapegoat.replace(r11a, "\u1122\u3344").indexOf("|") //干掉所有短路或
        if (index > -1) {
            return {
                filters: value.slice(index),
                value: value.slice(0, index),
                pos: pos || 0,
                expr: true
            }
        }
    }
    return {
        value: value,
        filters: "",
        expr: true
    }
}

function scanExpr(str) {
    var tokens = [],
            value, start = 0,
            stop
    do {
        stop = str.indexOf(openTag, start)
        if (stop === -1) {
            break
        }
        value = str.slice(start, stop)
        if (value) { // {{ 左边的文本
            tokens.push({
                value: value,
                filters: "",
                expr: false
            })
        }
        start = stop + openTag.length
        stop = str.indexOf(closeTag, start)
        if (stop === -1) {
            break
        }
        value = str.slice(start, stop)
        if (value) { //处理{{ }}插值表达式
            tokens.push(getToken(value, start))
        }
        start = stop + closeTag.length
    } while (1)
    value = str.slice(start)
    if (value) { //}} 右边的文本
        tokens.push({
            value: value,
            expr: false,
            filters: ""
        })
    }
    return tokens
}

function scanText(textNode, vmodels) {
    var bindings = []
    if (textNode.nodeType === 8) {
        var token = getToken(textNode.nodeValue)
        var tokens = [token]
    } else {
        tokens = scanExpr(textNode.data)
    }
    if (tokens.length) {
        for (var i = 0; token = tokens[i++]; ) {
            var node = DOC.createTextNode(token.value) //将文本转换为文本节点，并替换原来的文本节点
            if (token.expr) {
                token.type = "text"
                token.element = node
                token.filters = token.filters.replace(rhasHtml, function() {
                    token.type = "html"
                    return ""
                })// jshint ignore:line
                bindings.push(token) //收集带有插值表达式的文本
            }
            avalonFragment.appendChild(node)
        }
        textNode.parentNode.replaceChild(avalonFragment, textNode)
        if (bindings.length)
            executeBindings(bindings, vmodels)
    }
}

var bools = ["autofocus,autoplay,async,allowTransparency,checked,controls",
    "declare,disabled,defer,defaultChecked,defaultSelected",
    "contentEditable,isMap,loop,multiple,noHref,noResize,noShade",
    "open,readOnly,selected"
].join(",")
var boolMap = {}
bools.replace(rword, function(name) {
    boolMap[name.toLowerCase()] = name
})

var propMap = { //属性名映射
    "accept-charset": "acceptCharset",
    "char": "ch",
    "charoff": "chOff",
    "class": "className",
    "for": "htmlFor",
    "http-equiv": "httpEquiv"
}

var anomaly = ["accessKey,bgColor,cellPadding,cellSpacing,codeBase,codeType,colSpan",
    "dateTime,defaultValue,frameBorder,longDesc,maxLength,marginWidth,marginHeight",
    "rowSpan,tabIndex,useMap,vSpace,valueType,vAlign"
].join(",")
anomaly.replace(rword, function(name) {
    propMap[name.toLowerCase()] = name
})

var rnoscripts = /<noscript.*?>(?:[\s\S]+?)<\/noscript>/img
var rnoscriptText = /<noscript.*?>([\s\S]+?)<\/noscript>/im

var getXHR = function() {
    return new(window.XMLHttpRequest || ActiveXObject)("Microsoft.XMLHTTP") // jshint ignore:line
}

var templatePool = avalon.templateCache = {}

bindingHandlers.attr = function(data, vmodels) {
    var text = data.value.trim(),
        simple = true
    if (text.indexOf(openTag) > -1 && text.indexOf(closeTag) > 2) {
        simple = false
        if (rexpr.test(text) && RegExp.rightContext === "" && RegExp.leftContext === "") {
            simple = true
            text = RegExp.$1
        }
    }
    if (data.type === "include") {
        var elem = data.element
        data.includeRendered = getBindingCallback(elem, "data-include-rendered", vmodels)
        data.includeLoaded = getBindingCallback(elem, "data-include-loaded", vmodels)
        var outer = data.includeReplace = !! avalon(elem).data("includeReplace")
        if (avalon(elem).data("includeCache")) {
            data.templateCache = {}
        }
        data.startInclude = DOC.createComment("ms-include")
        data.endInclude = DOC.createComment("ms-include-end")
        if (outer) {
            data.element = data.startInclude
            elem.parentNode.insertBefore(data.startInclude, elem)
            elem.parentNode.insertBefore(data.endInclude, elem.nextSibling)
        } else {
            elem.insertBefore(data.startInclude, elem.firstChild)
            elem.appendChild(data.endInclude)
        }
    }
    data.handlerName = "attr" //handleName用于处理多种绑定共用同一种bindingExecutor的情况
    parseExprProxy(text, vmodels, data, (simple ? 0 : scanExpr(data.value)))
}

bindingExecutors.attr = function(val, elem, data) {
    var method = data.type,
        attrName = data.param
    if (method === "css") {
        avalon(elem).css(attrName, val)
    } else if (method === "attr") {
       
        // ms-attr-class="xxx" vm.xxx="aaa bbb ccc"将元素的className设置为aaa bbb ccc
        // ms-attr-class="xxx" vm.xxx=false  清空元素的所有类名
        // ms-attr-name="yyy"  vm.yyy="ooo" 为元素设置name属性
        var toRemove = (val === false) || (val === null) || (val === void 0)

        if (!W3C && propMap[attrName]) { //旧式IE下需要进行名字映射
            attrName = propMap[attrName]
        }
        var bool = boolMap[attrName]
        if (typeof elem[bool] === "boolean") {
            elem[bool] = !! val //布尔属性必须使用el.xxx = true|false方式设值
            if (!val) { //如果为false, IE全系列下相当于setAttribute(xxx,''),会影响到样式,需要进一步处理
                toRemove = true
            }
        }
        if (toRemove) {
            return elem.removeAttribute(attrName)
        }
        //SVG只能使用setAttribute(xxx, yyy), VML只能使用elem.xxx = yyy ,HTML的固有属性必须elem.xxx = yyy
        var isInnate = rsvg.test(elem) ? false : (DOC.namespaces && isVML(elem)) ? true : attrName in elem.cloneNode(false)
        if (isInnate) {
            elem[attrName] = val
        } else {
            elem.setAttribute(attrName, val)
        }
    } else if (method === "include" && val) {
        var vmodels = data.vmodels
        var rendered = data.includeRendered
        var loaded = data.includeLoaded
        var replace = data.includeReplace
        var target = replace ? elem.parentNode : elem
        var scanTemplate = function(text) {
            if (loaded) {
                var newText = loaded.apply(target, [text].concat(vmodels))
                if (typeof newText === "string")
                    text = newText
            }
            if (rendered) {
                checkScan(target, function() {
                    rendered.call(target)
                }, NaN)
            }
            var lastID = data.includeLastID
            if (data.templateCache && lastID && lastID !== val) {
                var lastTemplate = data.templateCache[lastID]
                if (!lastTemplate) {
                    lastTemplate = data.templateCache[lastID] = DOC.createElement("div")
                    ifGroup.appendChild(lastTemplate)
                }
            }
            data.includeLastID = val
            while (true) {
                var node = data.startInclude.nextSibling
                if (node && node !== data.endInclude) {
                    target.removeChild(node)
                    if (lastTemplate)
                        lastTemplate.appendChild(node)
                } else {
                    break
                }
            }
            var dom = getTemplateNodes(data, val, text)
            var nodes = avalon.slice(dom.childNodes)
            target.insertBefore(dom, data.endInclude)
            scanNodeArray(nodes, vmodels)
        }

        if (data.param === "src") {
            if (typeof templatePool[val] === "string") {
                avalon.nextTick(function() {
                    scanTemplate(templatePool[val])
                })
            } else if (Array.isArray(templatePool[val])) { //#805 防止在循环绑定中发出许多相同的请求
                templatePool[val].push(scanTemplate)
            } else {
                var xhr = getXHR()
                xhr.onreadystatechange = function() {
                    if (xhr.readyState === 4) {
                        var s = xhr.status
                        if (s >= 200 && s < 300 || s === 304 || s === 1223) {
                            var text = xhr.responseText
                            for (var f = 0, fn; fn = templatePool[val][f++];) {
                                fn(text)
                            }
                            templatePool[val] = text
                        }
                    }
                }
                templatePool[val] = [scanTemplate]
                xhr.open("GET", val, true)
                if ("withCredentials" in xhr) {
                    xhr.withCredentials = true
                }
                xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest")
                xhr.send(null)
            }
        } else {
            //IE系列与够新的标准浏览器支持通过ID取得元素（firefox14+）
            //http://tjvantoll.com/2012/07/19/dom-element-references-as-global-variables/
            var el = val && val.nodeType === 1 ? val : DOC.getElementById(val)
            if (el) {
                if (el.tagName === "NOSCRIPT" && !(el.innerHTML || el.fixIE78)) { //IE7-8 innerText,innerHTML都无法取得其内容，IE6能取得其innerHTML
                    xhr = getXHR() //IE9-11与chrome的innerHTML会得到转义的内容，它们的innerText可以
                    xhr.open("GET", location, false) //谢谢Nodejs 乱炖群 深圳-纯属虚构
                    xhr.send(null)
                    //http://bbs.csdn.net/topics/390349046?page=1#post-393492653
                    var noscripts = DOC.getElementsByTagName("noscript")
                    var array = (xhr.responseText || "").match(rnoscripts) || []
                    var n = array.length
                    for (var i = 0; i < n; i++) {
                        var tag = noscripts[i]
                        if (tag) { //IE6-8中noscript标签的innerHTML,innerText是只读的
                            tag.style.display = "none" //http://haslayout.net/css/noscript-Ghost-Bug
                            tag.fixIE78 = (array[i].match(rnoscriptText) || ["", "&nbsp;"])[1]
                        }
                    }
                }
                avalon.nextTick(function() {
                    scanTemplate(el.fixIE78 || el.value || el.innerText || el.innerHTML)
                })
            }
        }
    } else {
        if (!root.hasAttribute && typeof val === "string" && (method === "src" || method === "href")) {
            val = val.replace(/&amp;/g, "&") //处理IE67自动转义的问题
        }
        elem[method] = val
        if (window.chrome && elem.tagName === "EMBED") {
            var parent = elem.parentNode //#525  chrome1-37下embed标签动态设置src不能发生请求
            var comment = document.createComment("ms-src")
            parent.replaceChild(comment, elem)
            parent.replaceChild(elem, comment)
        }
    }
}

function getTemplateNodes(data, id, text) {
    var div = data.templateCache && data.templateCache[id]
    if (div) {
        var dom = DOC.createDocumentFragment(),
            firstChild
        while (firstChild = div.firstChild) {
            dom.appendChild(firstChild)
        }
        return dom
    }
    return avalon.parseHTML(text)
}

//这几个指令都可以使用插值表达式，如ms-src="aaa/{{b}}/{{c}}.html"
"title,alt,src,value,css,include,href".replace(rword, function(name) {
    bindingHandlers[name] = bindingHandlers.attr
})
//根据VM的属性值或表达式的值切换类名，ms-class="xxx yyy zzz:flag" 
//http://www.cnblogs.com/rubylouvre/archive/2012/12/17/2818540.html
bindingHandlers["class"] = function(data, vmodels) {
    var oldStyle = data.param,
        text = data.value,
        rightExpr
        data.handlerName = "class"
    if (!oldStyle || isFinite(oldStyle)) {
        data.param = "" //去掉数字
        var noExpr = text.replace(rexprg, function(a) {
            return a.replace(/./g, "0")
            //return Math.pow(10, a.length - 1) //将插值表达式插入10的N-1次方来占位
        })
        var colonIndex = noExpr.indexOf(":") //取得第一个冒号的位置
        if (colonIndex === -1) { // 比如 ms-class="aaa bbb ccc" 的情况
            var className = text
        } else { // 比如 ms-class-1="ui-state-active:checked" 的情况 
            className = text.slice(0, colonIndex)
            rightExpr = text.slice(colonIndex + 1)
            parseExpr(rightExpr, vmodels, data) //决定是添加还是删除
            if (!data.evaluator) {
                log("debug: ms-class '" + (rightExpr || "").trim() + "' 不存在于VM中")
                return false
            } else {
                data._evaluator = data.evaluator
                data._args = data.args
            }
        }
        var hasExpr = rexpr.test(className) //比如ms-class="width{{w}}"的情况
        if (!hasExpr) {
            data.immobileClass = className
        }
        parseExprProxy("", vmodels, data, (hasExpr ? scanExpr(className) : 0))
    } else {
        data.immobileClass = data.oldStyle = data.param
        parseExprProxy(text, vmodels, data)
    }
}

bindingExecutors["class"] = function(val, elem, data) {
    var $elem = avalon(elem),
        method = data.type
    if (method === "class" && data.oldStyle) { //如果是旧风格
        $elem.toggleClass(data.oldStyle, !! val)
    } else {
        //如果存在冒号就有求值函数
        data.toggleClass = data._evaluator ? !! data._evaluator.apply(elem, data._args) : true
        data.newClass = data.immobileClass || val
        if (data.oldClass && data.newClass !== data.oldClass) {
            $elem.removeClass(data.oldClass)
        }
        data.oldClass = data.newClass
        switch (method) {
            case "class":
                $elem.toggleClass(data.newClass, data.toggleClass)
                break
            case "hover":
            case "active":
                if (!data.hasBindEvent) { //确保只绑定一次
                    var activate = "mouseenter" //在移出移入时切换类名
                    var abandon = "mouseleave"
                    if (method === "active") { //在聚焦失焦中切换类名
                        elem.tabIndex = elem.tabIndex || -1
                        activate = "mousedown"
                        abandon = "mouseup"
                        var fn0 = $elem.bind("mouseleave", function() {
                            data.toggleClass && $elem.removeClass(data.newClass)
                        })
                    }
                    var fn1 = $elem.bind(activate, function() {
                        data.toggleClass && $elem.addClass(data.newClass)
                    })
                    var fn2 = $elem.bind(abandon, function() {
                        data.toggleClass && $elem.removeClass(data.newClass)
                    })
                    data.rollback = function() {
                        $elem.unbind("mouseleave", fn0)
                        $elem.unbind(activate, fn1)
                        $elem.unbind(abandon, fn2)
                    }
                    data.hasBindEvent = true
                }
                break;
        }
    }
}

"hover,active".replace(rword, function(method) {
    bindingHandlers[method] = bindingHandlers["class"]
})
//ms-controller绑定已经在scanTag 方法中实现
//ms-css绑定已由ms-attr绑定实现


// bindingHandlers.data 定义在if.js
bindingExecutors.data = function(val, elem, data) {
	var key = "data-" + data.param
	if (val && typeof val === "object") {
		elem[key] = val
	} else {
		elem.setAttribute(key, String(val))
	}
}
//双工绑定
var duplexBinding = bindingHandlers.duplex = function(data, vmodels) {
    var elem = data.element,
        hasCast
        parseExprProxy(data.value, vmodels, data, 0, 1)

        data.changed = getBindingCallback(elem, "data-duplex-changed", vmodels) || noop
    if (data.evaluator && data.args) {
        var params = []
        var casting = oneObject("string,number,boolean,checked")
        if (elem.type === "radio" && data.param === "") {
            data.param = "checked"
        }
        if (elem.msData) {
            elem.msData["ms-duplex"] = data.value
        }
        data.param.replace(/\w+/g, function(name) {
            if (/^(checkbox|radio)$/.test(elem.type) && /^(radio|checked)$/.test(name)) {
                if (name === "radio")
                    log("ms-duplex-radio已经更名为ms-duplex-checked")
                name = "checked"
                data.isChecked = true
            }
            if (name === "bool") {
                name = "boolean"
                log("ms-duplex-bool已经更名为ms-duplex-boolean")
            } else if (name === "text") {
                name = "string"
                log("ms-duplex-text已经更名为ms-duplex-string")
            }
            if (casting[name]) {
                hasCast = true
            }
            avalon.Array.ensure(params, name)
        })
        if (!hasCast) {
            params.push("string")
        }
        data.param = params.join("-")
        data.bound = function(type, callback) {
            if (elem.addEventListener) {
                elem.addEventListener(type, callback, false)
            } else {
                elem.attachEvent("on" + type, callback)
            }
            var old = data.rollback
            data.rollback = function() {
                elem.avalonSetter = null
                avalon.unbind(elem, type, callback)
                old && old()
            }
        }
        for (var i in avalon.vmodels) {
            var v = avalon.vmodels[i]
            v.$fire("avalon-ms-duplex-init", data)
        }
        var cpipe = data.pipe || (data.pipe = pipe)
        cpipe(null, data, "init")
        var tagName = elem.tagName
        duplexBinding[tagName] && duplexBinding[tagName](elem, data.evaluator.apply(null, data.args), data)
    }
}
//不存在 bindingExecutors.duplex

    function fixNull(val) {
        return val == null ? "" : val
    }
avalon.duplexHooks = {
    checked: {
        get: function(val, data) {
            return !data.element.oldValue
        }
    },
    string: {
        get: function(val) { //同步到VM
            return val
        },
        set: fixNull
    },
    "boolean": {
        get: function(val) {
            return val === "true"
        },
        set: fixNull
    },
    number: {
        get: function(val, data) {
            var number = parseFloat(val)
            if (-val === -number) {
                return number
            }
            var arr = /strong|medium|weak/.exec(data.element.getAttribute("data-duplex-number")) || ["medium"]
            switch (arr[0]) {
                case "strong":
                    return 0
                case "medium":
                    return val === "" ? "" : 0
                case "weak":
                    return val
            }
        },
        set: fixNull
    }
}

function pipe(val, data, action, e) {
    data.param.replace(/\w+/g, function(name) {
        var hook = avalon.duplexHooks[name]
        if (hook && typeof hook[action] === "function") {
            val = hook[action](val, data)
        }
    })
    return val
}

var TimerID, ribbon = []

    avalon.tick = function(fn) {
        if (ribbon.push(fn) === 1) {
            TimerID = setInterval(ticker, 60)
        }
    }

    function ticker() {
        for (var n = ribbon.length - 1; n >= 0; n--) {
            var el = ribbon[n]
            if (el() === false) {
                ribbon.splice(n, 1)
            }
        }
        if (!ribbon.length) {
            clearInterval(TimerID)
        }
    }

var watchValueInTimer = noop
var rmsinput = /text|password|hidden/
new function() { // jshint ignore:line
    try { //#272 IE9-IE11, firefox
        var setters = {}
        var aproto = HTMLInputElement.prototype
        var bproto = HTMLTextAreaElement.prototype

            function newSetter(value) { // jshint ignore:line
                if (avalon.optimize ||  this.parentNode) {
                    setters[this.tagName].call(this, value)
                    if (!rmsinput.test(this.type))
                        return
                    if (!this.msFocus && this.avalonSetter) {
                        this.avalonSetter()
                    }
                }
            }
        var inputProto = HTMLInputElement.prototype
        Object.getOwnPropertyNames(inputProto) //故意引发IE6-8等浏览器报错
        setters["INPUT"] = Object.getOwnPropertyDescriptor(aproto, "value").set
        Object.defineProperty(aproto, "value", {
            set: newSetter
        })
        setters["TEXTAREA"] = Object.getOwnPropertyDescriptor(bproto, "value").set
        Object.defineProperty(bproto, "value", {
            set: newSetter
        })
    } catch (e) {
        //在chrome 43中 ms-duplex终于不需要使用定时器实现双向绑定了
        // http://updates.html5rocks.com/2015/04/DOM-attributes-now-on-the-prototype
        // https://docs.google.com/document/d/1jwA8mtClwxI-QJuHT7872Z0pxpZz8PBkf2bGAbsUtqs/edit?pli=1
        watchValueInTimer = avalon.tick
    }
} // jshint ignore:line
if (IEVersion) {
    avalon.bind(DOC, "selectionchange", function(e) {
        var el = DOC.activeElement
        if (el && typeof el.avalonSetter === "function") {
            el.avalonSetter()
        }
    })
}

//处理radio, checkbox, text, textarea, password
duplexBinding.INPUT = function(element, evaluator, data) {
    var $type = element.type,
        bound = data.bound,
        $elem = avalon(element),
        composing = false

        function callback(value) {
            data.changed.call(this, value, data)
        }

        function compositionStart() {
            composing = true
        }

        function compositionEnd() {
            composing = false
        }
        //当value变化时改变model的值
    var updateVModel = function() {
        if (composing) //处理中文输入法在minlengh下引发的BUG
            return
        var val = element.oldValue = element.value //防止递归调用形成死循环
        var lastValue = data.pipe(val, data, "get")
        if ($elem.data("duplexObserve") !== false) {
            evaluator(lastValue)
            callback.call(element, lastValue)
            if ($elem.data("duplex-focus")) {
                avalon.nextTick(function() {
                    element.focus()
                })
            }
        }
    }
    //当model变化时,它就会改变value的值
    data.handler = function() {
        var val = data.pipe(evaluator(), data, "set") + "" //fix #673
        if (val !== element.oldValue) {
            element.value = val
        }
    }
    if (data.isChecked || $type === "radio") {
        var IE6 = IEVersion === 6
        updateVModel = function() {
            if ($elem.data("duplexObserve") !== false) {
                var lastValue = data.pipe(element.value, data, "get")
                evaluator(lastValue)
                callback.call(element, lastValue)
            }
        }
        data.handler = function() {
            var val = evaluator()
            var checked = data.isChecked ? !! val : val + "" === element.value
            element.oldValue = checked
            if (IE6) {
                setTimeout(function() {
                    //IE8 checkbox, radio是使用defaultChecked控制选中状态，
                    //并且要先设置defaultChecked后设置checked
                    //并且必须设置延迟
                    element.defaultChecked = checked
                    element.checked = checked
                }, 31)
            } else {
                element.checked = checked
            }
        }
        bound("click", updateVModel)
    } else if ($type === "checkbox") {
        updateVModel = function() {
            if ($elem.data("duplexObserve") !== false) {
                var method = element.checked ? "ensure" : "remove"
                var array = evaluator()
                if (!Array.isArray(array)) {
                    log("ms-duplex应用于checkbox上要对应一个数组")
                    array = [array]
                }
                avalon.Array[method](array, data.pipe(element.value, data, "get"))
                callback.call(element, array)
            }
        }

        data.handler = function() {
            var array = [].concat(evaluator()) //强制转换为数组
            element.checked = array.indexOf(data.pipe(element.value, data, "get")) > -1
        }
        bound(W3C ? "change" : "click", updateVModel)
    } else {
        var events = element.getAttribute("data-duplex-event") || "input"
        if (element.attributes["data-event"]) {
            log("data-event指令已经废弃，请改用data-duplex-event")
        }

        function delay(e) { // jshint ignore:line
            setTimeout(function() {
                updateVModel(e)
            })
        }
        events.replace(rword, function(name) {
            switch (name) {
                case "input":
                    if (!IEVersion) { // W3C
                        bound("input", updateVModel)
                        //非IE浏览器才用这个
                        bound("compositionstart", compositionStart)
                        bound("compositionend", compositionEnd)
                        bound("DOMAutoComplete", updateVModel)
                    } else { //onpropertychange事件无法区分是程序触发还是用户触发
                        // IE下通过selectionchange事件监听IE9+点击input右边的X的清空行为，及粘贴，剪切，删除行为
                        if (IEVersion > 8) {
                            bound("input", updateVModel) //IE9使用propertychange无法监听中文输入改动
                        } else {
                            bound("propertychange", function(e) { //IE6-8下第一次修改时不会触发,需要使用keydown或selectionchange修正
                                if (e.propertyName === "value") {
                                    updateVModel()
                                }
                            })
                        }
                        bound("dragend", delay)
                        //http://www.cnblogs.com/rubylouvre/archive/2013/02/17/2914604.html
                        //http://www.matts411.com/post/internet-explorer-9-oninput/
                    }
                    break
                default:
                    bound(name, updateVModel)
                    break
            }
        })
        bound("focus", function() {
            element.msFocus = true
        })
        bound("blur", function() {
            element.msFocus = false
        })

        if (rmsinput.test($type)) {
            watchValueInTimer(function() {
                if (avalon.optimize || element.parentNode) {
                    if (!element.msFocus && element.oldValue !== element.value) {
                        updateVModel()
                    }
                } else if (!element.msRetain) {
                    return false
                }
            })
        }

        element.avalonSetter = updateVModel //#765
    }

    element.oldValue = element.value
    avalon.injectBinding(data)
    callback.call(element, element.value)
}
duplexBinding.TEXTAREA = duplexBinding.INPUT
duplexBinding.SELECT = function(element, evaluator, data) {
    var $elem = avalon(element)

        function updateVModel() {
            if ($elem.data("duplexObserve") !== false) {
                var val = $elem.val() //字符串或字符串数组
                if (Array.isArray(val)) {
                    val = val.map(function(v) {
                        return data.pipe(v, data, "get")
                    })
                } else {
                    val = data.pipe(val, data, "get")
                }
                if (val + "" !== element.oldValue) {
                    evaluator(val)
                }
                data.changed.call(element, val, data)
            }
        }
    data.handler = function() {
        var val = evaluator()
        val = val && val.$model || val
        if (Array.isArray(val)) {
            if (!element.multiple) {
                log("ms-duplex在<select multiple=true>上要求对应一个数组")
            }
        } else {
            if (element.multiple) {
                log("ms-duplex在<select multiple=false>不能对应一个数组")
            }
        }
        //必须变成字符串后才能比较
        val = Array.isArray(val) ? val.map(String) : val + ""
        if (val + "" !== element.oldValue) {
            $elem.val(val)
            element.oldValue = val + ""
        }
    }
    data.bound("change", updateVModel)
    element.msCallback = function() {
        avalon.injectBinding(data)
        data.changed.call(element, evaluator(), data)
    }
}
// bindingHandlers.html 定义在if.js
bindingExecutors.html = function (val, elem, data) {
    var isHtmlFilter = elem.nodeType !== 1
    var parent = isHtmlFilter ? elem.parentNode : elem
    if (!parent)
        return
    val = val == null ? "" : val
    if (data.oldText !== val) {
        data.oldText = val
    } else {
        return
    }
    if (elem.nodeType === 3) {
        var signature = generateID("html")
        parent.insertBefore(DOC.createComment(signature), elem)
        data.element = DOC.createComment(signature + ":end")
        parent.replaceChild(data.element, elem)
        elem = data.element
    }
    if (typeof val !== "object") {//string, number, boolean
        var fragment = avalon.parseHTML(String(val))
    } else if (val.nodeType === 11) { //将val转换为文档碎片
        fragment = val
    } else if (val.nodeType === 1 || val.item) {
        var nodes = val.nodeType === 1 ? val.childNodes : val.item
        fragment = avalonFragment.cloneNode(true)
        while (nodes[0]) {
            fragment.appendChild(nodes[0])
        }
    }

    nodes = avalon.slice(fragment.childNodes)
    //插入占位符, 如果是过滤器,需要有节制地移除指定的数量,如果是html指令,直接清空
    if (isHtmlFilter) {
        var endValue = elem.nodeValue.slice(0, -4)
        while (true) {
            var node = elem.previousSibling
            if (!node || node.nodeType === 8 && node.nodeValue === endValue) {
                break
            } else {
                parent.removeChild(node)
            }
        }
        parent.insertBefore(fragment, elem)
    } else {
        avalon.clearHTML(elem).appendChild(fragment)
    }
    scanNodeArray(nodes, data.vmodels)
}
bindingHandlers["if"] =
    bindingHandlers.data =
    bindingHandlers.text =
    bindingHandlers.html =
    function(data, vmodels) {
        parseExprProxy(data.value, vmodels, data)
}

bindingExecutors["if"] = function(val, elem, data) {
     try {
         if(!elem.parentNode) return
     } catch(e) {return}
    // console.log(elem.parentNode)
    if (val) { //插回DOM树
        if (elem.nodeType === 8) {
            elem.parentNode.replaceChild(data.template, elem)
         //   animate.enter(data.template, elem.parentNode)
            elem = data.element = data.template //这时可能为null
        }
        if (elem.getAttribute(data.name)) {
            elem.removeAttribute(data.name)
            scanAttr(elem, data.vmodels)
        }
        data.rollback = null
    } else { //移出DOM树，并用注释节点占据原位置
        if (elem.nodeType === 1) {
            var node = data.element = DOC.createComment("ms-if")
            elem.parentNode.replaceChild(node, elem)
       //     animate.leave(elem, node.parentNode, node)
            data.template = elem //元素节点
            ifGroup.appendChild(elem)
            data.rollback = function() {
                if (elem.parentNode === ifGroup) {
                    ifGroup.removeChild(elem)
                }
            }
        }
    }
}
//ms-important绑定已经在scanTag 方法中实现
//ms-include绑定已由ms-attr绑定实现

var rdash = /\(([^)]*)\)/
bindingHandlers.on = function(data, vmodels) {
    var value = data.value
    data.type = "on"
    var eventType = data.param.replace(/-\d+$/, "") // ms-on-mousemove-10
    if (typeof bindingHandlers.on[eventType + "Hook"] === "function") {
        bindingHandlers.on[eventType + "Hook"](data)
    }
    if (value.indexOf("(") > 0 && value.indexOf(")") > -1) {
        var matched = (value.match(rdash) || ["", ""])[1].trim()
        if (matched === "" || matched === "$event") { // aaa() aaa($event)当成aaa处理
            value = value.replace(rdash, "")
        }
    }
    parseExprProxy(value, vmodels, data)
}

bindingExecutors.on = function(callback, elem, data) {
    callback = function(e) {
        var fn = data.evaluator || noop
        return fn.apply(this, data.args.concat(e))
    }
    var eventType = data.param.replace(/-\d+$/, "") // ms-on-mousemove-10
    if (eventType === "scan") {
        callback.call(elem, {
            type: eventType
        })
    } else if (typeof data.specialBind === "function") {
        data.specialBind(elem, callback)
    } else {
        var removeFn = avalon.bind(elem, eventType, callback)
    }
    data.rollback = function() {
        if (typeof data.specialUnbind === "function") {
            data.specialUnbind()
        } else {
            avalon.unbind(elem, eventType, removeFn)
        }
    }
}
bindingHandlers.repeat = function (data, vmodels) {
    var type = data.type
    parseExprProxy(data.value, vmodels, data, 0, 1)
    var freturn = false
    try {
        var $repeat = data.$repeat = data.evaluator.apply(0, data.args || [])
        var xtype = avalon.type($repeat)
        if (xtype !== "object" && xtype !== "array") {
            freturn = true
            avalon.log("warning:" + data.value + "只能是对象或数组")
        }
    } catch (e) {
        freturn = true
    }
    var arr = data.value.split(".") || []
    if (arr.length > 1) {
        arr.pop()
        var n = arr[0]
        for (var i = 0, v; v = vmodels[i++]; ) {
            if (v && v.hasOwnProperty(n)) {
                var events = v[n].$events || {}
                events[subscribers] = events[subscribers] || []
                events[subscribers].push(data)
                break
            }
        }
    }

    var elem = data.element
    if (elem.nodeType === 1) {
        elem.removeAttribute(data.name)
        data.sortedCallback = getBindingCallback(elem, "data-with-sorted", vmodels)
        data.renderedCallback = getBindingCallback(elem, "data-" + type + "-rendered", vmodels)
        var signature = generateID(type)
        var start = DOC.createComment(signature)
        var end = DOC.createComment(signature + ":end")
        data.signature = signature
        data.template = avalonFragment.cloneNode(false)
        if (type === "repeat") {
            var parent = elem.parentNode
            parent.replaceChild(end, elem)
            parent.insertBefore(start, end)
            data.template.appendChild(elem)
        } else {
            while (elem.firstChild) {
                data.template.appendChild(elem.firstChild)
            }
            elem.appendChild(start)
            elem.appendChild(end)
        }
        data.element = end
        data.handler = bindingExecutors.repeat
        data.rollback = function () {
            var elem = data.element
            if (!elem)
                return
            data.handler("clear")
        }
    }

    if (freturn) {
        return
    }

    data.$outer = {}
    var check0 = "$key"
    var check1 = "$val"
    if (Array.isArray($repeat)) {
        if (!$repeat.$map) {
            $repeat.$map = {
                el: 1
            }
            var m = $repeat.length
            var $proxy = []
            for (i = 0; i < m; i++) {//生成代理VM
                $proxy.push(eachProxyAgent(i, $repeat))
            }
            $repeat.$proxy = $proxy
        }
        $repeat.$map[data.param || "el"] = 1
        check0 = "$first"
        check1 = "$last"
    }
    for (i = 0; v = vmodels[i++]; ) {
        if (v.hasOwnProperty(check0) && v.hasOwnProperty(check1)) {
            data.$outer = v
            break
        }
    }
    var $events = $repeat.$events
    var $list = ($events || {})[subscribers]
    injectDependency($list, data)
    if (xtype === "object") {
        data.$with = true
        $repeat.$proxy || ($repeat.$proxy = {})
        data.handler("append", $repeat)
    } else if ($repeat.length) {
        data.handler("add", 0, $repeat.length)
    }
}

bindingExecutors.repeat = function (method, pos, el) {
    if (method) {
        var data = this, start, fragment
        var end = data.element
        var comments = getComments(data)
        var parent = end.parentNode
        var transation = avalonFragment.cloneNode(false)
        switch (method) {
            case "add": //在pos位置后添加el数组（pos为插入位置,el为要插入的个数）
                var n = pos + el
                var fragments = []
                var array = data.$repeat
                for (var i = pos; i < n; i++) {
                    var proxy = array.$proxy[i]
                    proxy.$outer = data.$outer
                    shimController(data, transation, proxy, fragments)
                }
                var now = new Date - 0
                avalon.optimize = avalon.optimize || now
                for (i = 0; fragment = fragments[i++]; ) {
                    scanNodeArray(fragment.nodes, fragment.vmodels)
                    fragment.nodes = fragment.vmodels = null
                }
                if(avalon.optimize === now){
                    delete avalon.optimize
                }
                parent.insertBefore(transation, comments[pos] || end)
                console.log("插入操作花费了 "+ (new Date - now))
                break
            case "del": //将pos后的el个元素删掉(pos, el都是数字)
                sweepNodes(comments[pos], comments[pos + el] || end)
                break
            case "clear":
                start = comments[0]
                if (start) {
                    sweepNodes(start, end)
                }
                break
            case "move":
                start = comments[0]
                if (start) {
                    var signature = start.nodeValue
                    var rooms = []
                    var room = [],
                            node
                    sweepNodes(start, end, function () {
                        room.unshift(this)
                        if (this.nodeValue === signature) {
                            rooms.unshift(room)
                            room = []
                        }
                    })
                    sortByIndex(rooms, pos)
                    while (room = rooms.shift()) {
                        while (node = room.shift()) {
                            transation.appendChild(node)
                        }
                    }
                    parent.insertBefore(transation, end)
                }
                break
            case "append":
                var object = pos //原来第2参数， 被循环对象
                var pool = object.$proxy   //代理对象组成的hash
                var keys = []
                fragments = []
                for (var key in pool) {
                    if (!object.hasOwnProperty(key)) {
                        proxyRecycler(pool[key], withProxyPool) //去掉之前的代理VM
                        delete(pool[key])
                    }
                }
                for (key in object) { //得到所有键名
                    if (object.hasOwnProperty(key) && key !== "hasOwnProperty" && key !== "$proxy") {
                        keys.push(key)
                    }
                }
                if (data.sortedCallback) { //如果有回调，则让它们排序
                    var keys2 = data.sortedCallback.call(parent, keys)
                    if (keys2 && Array.isArray(keys2) && keys2.length) {
                        keys = keys2
                    }
                }

                for (i = 0; key = keys[i++]; ) {
                    if (key !== "hasOwnProperty") {
                        pool[key] = withProxyAgent(pool[key], key, data)
                        shimController(data, transation, pool[key], fragments)
                    }
                }

                parent.insertBefore(transation, end)
                for (i = 0; fragment = fragments[i++]; ) {
                    scanNodeArray(fragment.nodes, fragment.vmodels)
                    fragment.nodes = fragment.vmodels = null
                }
                break
        }
        if (method === "clear")
            method = "del"
        var callback = data.renderedCallback || noop,
                args = arguments
        checkScan(parent, function () {
            callback.apply(parent, args)
            if (parent.oldValue && parent.tagName === "SELECT") { //fix #503
                avalon(parent).val(parent.oldValue.split(","))
            }
        }, NaN)
    }
}

"with,each".replace(rword, function (name) {
    bindingHandlers[name] = bindingHandlers.repeat
})
avalon.pool = eachProxyPool
function shimController(data, transation, proxy, fragments) {
    var content = data.template.cloneNode(true)
    var nodes = avalon.slice(content.childNodes)
    if (!data.$with) {
        content.insertBefore(DOC.createComment(data.signature), content.firstChild)
    }
    transation.appendChild(content)
    var nv = [proxy].concat(data.vmodels)
    var fragment = {
        nodes: nodes,
        vmodels: nv
    }
    fragments.push(fragment)
}

function getComments(data) {
    var end = data.element
    var signature = end.nodeValue.replace(":end", "")
    var node = end.previousSibling
    var array = []
    while (node) {
        if (node.nodeValue === signature) {
            array.unshift(node)
        }
        node = node.previousSibling
    }
    return array
}


//移除掉start与end之间的节点(保留end)
function sweepNodes(start, end, callback) {
    while (true) {
        var node = end.previousSibling
        if (!node)
            break
        node.parentNode.removeChild(node)
        callback && callback.call(node)
        if (node === start) {
            break
        }
    }
}

// 为ms-each,ms-with, ms-repeat会创建一个代理VM，
// 通过它们保持一个下上文，让用户能调用$index,$first,$last,$remove,$key,$val,$outer等属性与方法
// 所有代理VM的产生,消费,收集,存放通过xxxProxyFactory,xxxProxyAgent, recycleProxies,xxxProxyPool实现
var withProxyPool = []
function withProxyFactory() {
    var proxy = modelFactory({
        $key: "",
        $outer: {},
        $host: {},
        $val: {
            get: function () {
                return this.$host[this.$key]
            },
            set: function (val) {
                this.$host[this.$key] = val
            }
        }
    }, {
        $val: 1
    })
    proxy.$id = generateID("$proxy$with")
    return proxy
}

function withProxyAgent(proxy, key, data) {
    proxy = proxy || withProxyPool.pop()
    if (!proxy) {
        proxy = withProxyFactory()
    }
    var host = data.$repeat
    proxy.$key = key
    proxy.$host = host
    proxy.$outer = data.$outer
    if (host.$events) {
        proxy.$events.$val = host.$events[key]
    } else {
        proxy.$events = {}
    }
    return proxy
}

function eachProxyRecycler(proxies) {
    proxies.forEach(function (proxy) {
        proxyRecycler(proxy, eachProxyPool)
    })
    proxies.length = 0
}

function proxyRecycler(proxy, proxyPool) {
    for (var i in proxy.$events) {
        if (Array.isArray(proxy.$events[i])) {
            proxy.$events[i].forEach(function (data) {
                if (typeof data === "object")
                    disposeData(data)
            })// jshint ignore:line
            proxy.$events[i].length = 0
        }
    }
    proxy.$host = proxy.$outer = {}
    if (proxyPool.unshift(proxy) > kernel.maxRepeatSize) {
        proxyPool.pop()
    }
}
/*********************************************************************
 *                         各种指令                                  *
 **********************************************************************/
//ms-skip绑定已经在scanTag 方法中实现
// bindingHandlers.text 定义在if.js
bindingExecutors.text = function(val, elem) {
    val = val == null ? "" : val //不在页面上显示undefined null
    if (elem.nodeType === 3) { //绑定在文本节点上
        try { //IE对游离于DOM树外的节点赋值会报错
            elem.data = val
        } catch (e) {}
    } else { //绑定在特性节点上
        if ("textContent" in elem) {
            elem.textContent = val
        } else {
            elem.innerText = val
        }
    }
}
function parseDisplay(nodeName, val) {
    //用于取得此类标签的默认display值
    var key = "_" + nodeName
    if (!parseDisplay[key]) {
        var node = DOC.createElement(nodeName)
        root.appendChild(node)
        if (W3C) {
            val = getComputedStyle(node, null).display
        } else {
            val = node.currentStyle.display
        }
        root.removeChild(node)
        parseDisplay[key] = val
    }
    return parseDisplay[key]
}

avalon.parseDisplay = parseDisplay

bindingHandlers.visible = function(data, vmodels) {
    var elem = avalon(data.element)
    var display = elem.css("display")
    if (display === "none") {
        var style = elem[0].style
        var has = /visibility/i.test(style.cssText)
        var visible = elem.css("visibility")
        style.display = ""
        style.visibility = "hidden"
        display = elem.css("display")
        if (display === "none") {
            display = parseDisplay(elem[0].nodeName)
        }
        style.visibility = has ? visible : ""
    }
    data.display = display
    parseExprProxy(data.value, vmodels, data)
}

bindingExecutors.visible = function(val, elem, data) {
    elem.style.display = val ? data.display : "none"
}
bindingHandlers.widget = function(data, vmodels) {
    var args = data.value.match(rword)
    var elem = data.element
    var widget = args[0]
    var id = args[1]
    if (!id || id === "$") { //没有定义或为$时，取组件名+随机数
        id = generateID(widget)
    }
    var optName = args[2] || widget //没有定义，取组件名
    var constructor = avalon.ui[widget]
    if (typeof constructor === "function") { //ms-widget="tabs,tabsAAA,optname"
        vmodels = elem.vmodels || vmodels
        for (var i = 0, v; v = vmodels[i++];) {
            if (v.hasOwnProperty(optName) && typeof v[optName] === "object") {
                var vmOptions = v[optName]
                vmOptions = vmOptions.$model || vmOptions
                break
            }
        }
        if (vmOptions) {
            var wid = vmOptions[widget + "Id"]
            if (typeof wid === "string") {
                log("warning!不再支持" + widget + "Id")
                id = wid
            }
        }
        //抽取data-tooltip-text、data-tooltip-attr属性，组成一个配置对象
        var widgetData = avalon.getWidgetData(elem, widget)
        data.value = [widget, id, optName].join(",")
        data[widget + "Id"] = id
        data.evaluator = noop
        elem.msData["ms-widget-id"] = id
        var options = data[widget + "Options"] = avalon.mix({}, constructor.defaults, vmOptions || {}, widgetData)
        elem.removeAttribute("ms-widget")
        var vmodel = constructor(elem, data, vmodels) || {} //防止组件不返回VM
        if (vmodel.$id) {
            avalon.vmodels[id] = vmodel
            createSignalTower(elem, vmodel)
            try {
                vmodel.$init(function() {
                    avalon.scan(elem, [vmodel].concat(vmodels))
                    if (typeof options.onInit === "function") {
                        options.onInit.call(elem, vmodel, options, vmodels)
                    }
                })
            } catch (e) {}
            data.rollback = function() {
                try {
                    vmodel.widgetElement = null
                    vmodel.$remove()
                } catch (e) {}
                elem.msData = {}
                delete avalon.vmodels[vmodel.$id]
            }
            injectDisposeQueue(data, widgetList)
            if (window.chrome) {
                elem.addEventListener("DOMNodeRemovedFromDocument", function() {
                    setTimeout(rejectDisposeQueue)
                })
            }
        } else {
            avalon.scan(elem, vmodels)
        }
    } else if (vmodels.length) { //如果该组件还没有加载，那么保存当前的vmodels
        elem.vmodels = vmodels
    }
}
var widgetList = []
//不存在 bindingExecutors.widget
/*********************************************************************
 *                             自带过滤器                            *
 **********************************************************************/
var rscripts = /<script[^>]*>([\S\s]*?)<\/script\s*>/gim
var ron = /\s+(on[^=\s]+)(?:=("[^"]*"|'[^']*'|[^\s>]+))?/g
var ropen = /<\w+\b(?:(["'])[^"]*?(\1)|[^>])*>/ig
var rsanitize = {
    a: /\b(href)\=("javascript[^"]*"|'javascript[^']*')/ig,
    img: /\b(src)\=("javascript[^"]*"|'javascript[^']*')/ig,
    form: /\b(action)\=("javascript[^"]*"|'javascript[^']*')/ig
}
var rsurrogate = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g
var rnoalphanumeric = /([^\#-~| |!])/g;

function numberFormat(number, decimals, point, thousands) {
    //form http://phpjs.org/functions/number_format/
    //number	必需，要格式化的数字
    //decimals	可选，规定多少个小数位。
    //point	可选，规定用作小数点的字符串（默认为 . ）。
    //thousands	可选，规定用作千位分隔符的字符串（默认为 , ），如果设置了该参数，那么所有其他参数都是必需的。
    number = (number + '')
            .replace(/[^0-9+\-Ee.]/g, '')
    var n = !isFinite(+number) ? 0 : +number,
            prec = !isFinite(+decimals) ? 3 : Math.abs(decimals),
            sep = thousands || ",",
            dec = point || ".",
            s = '',
            toFixedFix = function(n, prec) {
                var k = Math.pow(10, prec)
                return '' + (Math.round(n * k) / k)
                        .toFixed(prec)
            }
    // Fix for IE parseFloat(0.55).toFixed(0) = 0;
    s = (prec ? toFixedFix(n, prec) : '' + Math.round(n))
            .split('.')
    if (s[0].length > 3) {
        s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep)
    }
    if ((s[1] || '')
            .length < prec) {
        s[1] = s[1] || ''
        s[1] += new Array(prec - s[1].length + 1)
                .join('0')
    }
    return s.join(dec)
}


var filters = avalon.filters = {
    uppercase: function(str) {
        return str.toUpperCase()
    },
    lowercase: function(str) {
        return str.toLowerCase()
    },
    truncate: function(str, length, truncation) {
        //length，新字符串长度，truncation，新字符串的结尾的字段,返回新字符串
        length = length || 30
        truncation = typeof truncation === "string" ?  truncation : "..." 
        return str.length > length ? str.slice(0, length - truncation.length) + truncation : String(str)
    },
    $filter: function(val) {
        for (var i = 1, n = arguments.length; i < n; i++) {
            var array = arguments[i]
            var fn = avalon.filters[array.shift()]
            if (typeof fn === "function") {
                var arr = [val].concat(array)
                val = fn.apply(null, arr)
            }
        }
        return val
    },
    camelize: camelize,
    //https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet
    //    <a href="javasc&NewLine;ript&colon;alert('XSS')">chrome</a> 
    //    <a href="data:text/html;base64, PGltZyBzcmM9eCBvbmVycm9yPWFsZXJ0KDEpPg==">chrome</a>
    //    <a href="jav	ascript:alert('XSS');">IE67chrome</a>
    //    <a href="jav&#x09;ascript:alert('XSS');">IE67chrome</a>
    //    <a href="jav&#x0A;ascript:alert('XSS');">IE67chrome</a>
    sanitize: function(str) {
        return str.replace(rscripts, "").replace(ropen, function(a, b) {
            var match = a.toLowerCase().match(/<(\w+)\s/)
            if (match) { //处理a标签的href属性，img标签的src属性，form标签的action属性
                var reg = rsanitize[match[1]]
                if (reg) {
                    a = a.replace(reg, function(s, name, value) {
                        var quote = value.charAt(0)
                        return name + "=" + quote + "javascript:void(0)" + quote// jshint ignore:line
                    })
                }
            }
            return a.replace(ron, " ").replace(/\s+/g, " ") //移除onXXX事件
        })
    },
    escape: function(str) {
        //将字符串经过 str 转义得到适合在页面中显示的内容, 例如替换 < 为 &lt 
        return String(str).
                replace(/&/g, '&amp;').
                replace(rsurrogate, function(value) {
                    var hi = value.charCodeAt(0)
                    var low = value.charCodeAt(1)
                    return '&#' + (((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000) + ';'
                }).
                replace(rnoalphanumeric, function(value) {
                    return '&#' + value.charCodeAt(0) + ';'
                }).
                replace(/</g, '&lt;').
                replace(/>/g, '&gt;')
    },
    currency: function(amount, symbol, fractionSize) {
        return (symbol || "\uFFE5") + numberFormat(amount, isFinite(fractionSize) ? fractionSize : 2)
    },
    number: numberFormat
}
/*
 'yyyy': 4 digit representation of year (e.g. AD 1 => 0001, AD 2010 => 2010)
 'yy': 2 digit representation of year, padded (00-99). (e.g. AD 2001 => 01, AD 2010 => 10)
 'y': 1 digit representation of year, e.g. (AD 1 => 1, AD 199 => 199)
 'MMMM': Month in year (January-December)
 'MMM': Month in year (Jan-Dec)
 'MM': Month in year, padded (01-12)
 'M': Month in year (1-12)
 'dd': Day in month, padded (01-31)
 'd': Day in month (1-31)
 'EEEE': Day in Week,(Sunday-Saturday)
 'EEE': Day in Week, (Sun-Sat)
 'HH': Hour in day, padded (00-23)
 'H': Hour in day (0-23)
 'hh': Hour in am/pm, padded (01-12)
 'h': Hour in am/pm, (1-12)
 'mm': Minute in hour, padded (00-59)
 'm': Minute in hour (0-59)
 'ss': Second in minute, padded (00-59)
 's': Second in minute (0-59)
 'a': am/pm marker
 'Z': 4 digit (+sign) representation of the timezone offset (-1200-+1200)
 format string can also be one of the following predefined localizable formats:
 
 'medium': equivalent to 'MMM d, y h:mm:ss a' for en_US locale (e.g. Sep 3, 2010 12:05:08 pm)
 'short': equivalent to 'M/d/yy h:mm a' for en_US locale (e.g. 9/3/10 12:05 pm)
 'fullDate': equivalent to 'EEEE, MMMM d,y' for en_US locale (e.g. Friday, September 3, 2010)
 'longDate': equivalent to 'MMMM d, y' for en_US locale (e.g. September 3, 2010
 'mediumDate': equivalent to 'MMM d, y' for en_US locale (e.g. Sep 3, 2010)
 'shortDate': equivalent to 'M/d/yy' for en_US locale (e.g. 9/3/10)
 'mediumTime': equivalent to 'h:mm:ss a' for en_US locale (e.g. 12:05:08 pm)
 'shortTime': equivalent to 'h:mm a' for en_US locale (e.g. 12:05 pm)
 */
new function() {// jshint ignore:line
    function toInt(str) {
        return parseInt(str, 10) || 0
    }

    function padNumber(num, digits, trim) {
        var neg = ""
        if (num < 0) {
            neg = '-'
            num = -num
        }
        num = "" + num
        while (num.length < digits)
            num = "0" + num
        if (trim)
            num = num.substr(num.length - digits)
        return neg + num
    }

    function dateGetter(name, size, offset, trim) {
        return function(date) {
            var value = date["get" + name]()
            if (offset > 0 || value > -offset)
                value += offset
            if (value === 0 && offset === -12) {
                value = 12
            }
            return padNumber(value, size, trim)
        }
    }

    function dateStrGetter(name, shortForm) {
        return function(date, formats) {
            var value = date["get" + name]()
            var get = (shortForm ? ("SHORT" + name) : name).toUpperCase()
            return formats[get][value]
        }
    }

    function timeZoneGetter(date) {
        var zone = -1 * date.getTimezoneOffset()
        var paddedZone = (zone >= 0) ? "+" : ""
        paddedZone += padNumber(Math[zone > 0 ? "floor" : "ceil"](zone / 60), 2) + padNumber(Math.abs(zone % 60), 2)
        return paddedZone
    }
    //取得上午下午

    function ampmGetter(date, formats) {
        return date.getHours() < 12 ? formats.AMPMS[0] : formats.AMPMS[1]
    }
    var DATE_FORMATS = {
        yyyy: dateGetter("FullYear", 4),
        yy: dateGetter("FullYear", 2, 0, true),
        y: dateGetter("FullYear", 1),
        MMMM: dateStrGetter("Month"),
        MMM: dateStrGetter("Month", true),
        MM: dateGetter("Month", 2, 1),
        M: dateGetter("Month", 1, 1),
        dd: dateGetter("Date", 2),
        d: dateGetter("Date", 1),
        HH: dateGetter("Hours", 2),
        H: dateGetter("Hours", 1),
        hh: dateGetter("Hours", 2, -12),
        h: dateGetter("Hours", 1, -12),
        mm: dateGetter("Minutes", 2),
        m: dateGetter("Minutes", 1),
        ss: dateGetter("Seconds", 2),
        s: dateGetter("Seconds", 1),
        sss: dateGetter("Milliseconds", 3),
        EEEE: dateStrGetter("Day"),
        EEE: dateStrGetter("Day", true),
        a: ampmGetter,
        Z: timeZoneGetter
    }
    var rdateFormat = /((?:[^yMdHhmsaZE']+)|(?:'(?:[^']|'')*')|(?:E+|y+|M+|d+|H+|h+|m+|s+|a|Z))(.*)/
    var raspnetjson = /^\/Date\((\d+)\)\/$/
    filters.date = function(date, format) {
        var locate = filters.date.locate,
                text = "",
                parts = [],
                fn, match
        format = format || "mediumDate"
        format = locate[format] || format
        if (typeof date === "string") {
            if (/^\d+$/.test(date)) {
                date = toInt(date)
            } else if (raspnetjson.test(date)) {
                date = +RegExp.$1
            } else {
                var trimDate = date.trim()
                var dateArray = [0, 0, 0, 0, 0, 0, 0]
                var oDate = new Date(0)
                //取得年月日
                trimDate = trimDate.replace(/^(\d+)\D(\d+)\D(\d+)/, function(_, a, b, c) {
                    var array = c.length === 4 ? [c, a, b] : [a, b, c]
                    dateArray[0] = toInt(array[0])     //年
                    dateArray[1] = toInt(array[1]) - 1 //月
                    dateArray[2] = toInt(array[2])     //日
                    return ""
                })
                var dateSetter = oDate.setFullYear
                var timeSetter = oDate.setHours
                trimDate = trimDate.replace(/[T\s](\d+):(\d+):?(\d+)?\.?(\d)?/, function(_, a, b, c, d) {
                    dateArray[3] = toInt(a) //小时
                    dateArray[4] = toInt(b) //分钟
                    dateArray[5] = toInt(c) //秒
                    if (d) {                //毫秒
                        dateArray[6] = Math.round(parseFloat("0." + d) * 1000)
                    }
                    return ""
                })
                var tzHour = 0
                var tzMin = 0
                trimDate = trimDate.replace(/Z|([+-])(\d\d):?(\d\d)/, function(z, symbol, c, d) {
                    dateSetter = oDate.setUTCFullYear
                    timeSetter = oDate.setUTCHours
                    if (symbol) {
                        tzHour = toInt(symbol + c)
                        tzMin = toInt(symbol + d)
                    }
                    return ""
                })

                dateArray[3] -= tzHour
                dateArray[4] -= tzMin
                dateSetter.apply(oDate, dateArray.slice(0, 3))
                timeSetter.apply(oDate, dateArray.slice(3))
                date = oDate
            }
        }
        if (typeof date === "number") {
            date = new Date(date)
        }
        if (avalon.type(date) !== "date") {
            return
        }
        while (format) {
            match = rdateFormat.exec(format)
            if (match) {
                parts = parts.concat(match.slice(1))
                format = parts.pop()
            } else {
                parts.push(format)
                format = null
            }
        }
        parts.forEach(function(value) {
            fn = DATE_FORMATS[value]
            text += fn ? fn(date, locate) : value.replace(/(^'|'$)/g, "").replace(/''/g, "'")
        })
        return text
    }
    var locate = {
        AMPMS: {
            0: "上午",
            1: "下午"
        },
        DAY: {
            0: "星期日",
            1: "星期一",
            2: "星期二",
            3: "星期三",
            4: "星期四",
            5: "星期五",
            6: "星期六"
        },
        MONTH: {
            0: "1月",
            1: "2月",
            2: "3月",
            3: "4月",
            4: "5月",
            5: "6月",
            6: "7月",
            7: "8月",
            8: "9月",
            9: "10月",
            10: "11月",
            11: "12月"
        },
        SHORTDAY: {
            "0": "周日",
            "1": "周一",
            "2": "周二",
            "3": "周三",
            "4": "周四",
            "5": "周五",
            "6": "周六"
        },
        fullDate: "y年M月d日EEEE",
        longDate: "y年M月d日",
        medium: "yyyy-M-d H:mm:ss",
        mediumDate: "yyyy-M-d",
        mediumTime: "H:mm:ss",
        "short": "yy-M-d ah:mm",
        shortDate: "yy-M-d",
        shortTime: "ah:mm"
    }
    locate.SHORTMONTH = locate.MONTH
    filters.date.locate = locate
}// jshint ignore:line
/*********************************************************************
 *                      AMD加载器                                   *
 **********************************************************************/
//https://www.devbridge.com/articles/understanding-amd-requirejs/
//http://maxogden.com/nested-dependencies.html
var modules = avalon.modules = {
    "domReady!": {
        exports: avalon,
        state: 3
    },
    "avalon": {
        exports: avalon,
        state: 4
    }
}
//Object(modules[id]).state拥有如下值 
// undefined  没有定义
// 1(send)    已经发出请求
// 2(loading) 已经被执行但还没有执行完成，在这个阶段define方法会被执行
// 3(loaded)  执行完毕，通过onload/onreadystatechange回调判定，在这个阶段checkDeps方法会执行
// 4(execute)  其依赖也执行完毕, 值放到exports对象上，在这个阶段fireFactory方法会执行
modules.exports = modules.avalon

new function () {// jshint ignore:line
    var loadings = [] //正在加载中的模块列表
    var factorys = [] //放置define方法的factory函数
    var rjsext = /\.js$/i
    function makeRequest(name, config) {
//1. 去掉资源前缀
        var res = "js"
        name = name.replace(/^(\w+)\!/, function (a, b) {
            res = b
            return ""
        })
        if (res === "ready") {
            log("debug: ready!已经被废弃，请使用domReady!")
            res = "domReady"
        }
//2. 去掉querystring, hash
        var query = ""
        name = name.replace(rquery, function (a) {
            query = a
            return ""
        })
        //3. 去掉扩展名
        var suffix = "." + res
        var ext = /js|css/.test(suffix) ? suffix : ""
        name = name.replace(/\.[a-z0-9]+$/g, function (a) {
            if (a === suffix) {
                ext = a
                return ""
            } else {
                return a
            }
        })
        var req = avalon.mix({
            query: query,
            ext: ext,
            res: res,
            name: name,
            toUrl: toUrl
        }, config)
        req.toUrl(name)
        return req
    }

    function fireRequest(req) {
        var name = req.name
        var res = req.res
        //1. 如果该模块已经发出请求，直接返回
        var module = modules[name]
        var urlNoQuery = name && req.urlNoQuery
        if (module && module.state >= 1) {
            return name
        }
        module = modules[urlNoQuery]
        if (module && module.state >= 3) {
            innerRequire(module.deps || [], module.factory, urlNoQuery)
            return urlNoQuery
        }
        if (name && !module) {
            module = modules[urlNoQuery] = {
                id: urlNoQuery,
                state: 1 //send
            }
            var wrap = function (obj) {
                resources[res] = obj
                obj.load(name, req, function (a) {
                    if (arguments.length && a !== void 0) {
                        module.exports = a
                    }
                    module.state = 4
                    checkDeps()
                })
            }

            if (!resources[res]) {
                innerRequire([res], wrap)
            } else {
                wrap(resources[res])
            }
        }
        return name ? urlNoQuery : res + "!"
    }

//核心API之一 require
    var requireQueue = []
    var isUserFirstRequire = false
    innerRequire = avalon.require = function (array, factory, parentUrl, defineConfig) {
        if (!isUserFirstRequire) {
            requireQueue.push(avalon.slice(arguments))
            if (arguments.length <= 2) {
                isUserFirstRequire = true
                var queue = requireQueue.splice(0, requireQueue.length), args
                while (args = queue.shift()) {
                    innerRequire.apply(null, args)
                }
            }
            return
        }

        if (!Array.isArray(array)) {
            avalon.error("require方法的第一个参数应为数组 " + array)
        }
        var deps = [] // 放置所有依赖项的完整路径
        var uniq = {}
        var id = parentUrl || "callback" + setTimeout("1")// jshint ignore:line
        defineConfig = defineConfig || {}
        defineConfig.baseUrl = kernel.baseUrl
        var isBuilt = !!defineConfig.built
        if (parentUrl) {
            defineConfig.parentUrl = parentUrl.substr(0, parentUrl.lastIndexOf("/"))
            defineConfig.mapUrl = parentUrl.replace(rjsext, "")
        }
        if (isBuilt) {
            var req = makeRequest(defineConfig.defineName, defineConfig)
            id = req.urlNoQuery
        } else {
            array.forEach(function (name) {
                var req = makeRequest(name, defineConfig)
                var url = fireRequest(req) //加载资源，并返回该资源的完整地址
                if (url) {
                    if (!uniq[url]) {
                        deps.push(url)
                        uniq[url] = "司徒正美" //去重
                    }
                }
            })
        }

        var module = modules[id]
        if (!module || module.state !== 4) {
            modules[id] = {
                id: id,
                deps: isBuilt ? array.concat() : deps,
                factory: factory || noop,
                state: 3
            }
        }
        if (!module) {
            //如果此模块是定义在另一个JS文件中, 那必须等该文件加载完毕, 才能放到检测列队中
            loadings.push(id)
        }
        checkDeps()
    }

//核心API之二 require
    innerRequire.define = function (name, deps, factory) { //模块名,依赖列表,模块本身
        if (typeof name !== "string") {
            factory = deps
            deps = name
            name = "anonymous"
        }
        if (!Array.isArray(deps)) {
            factory = deps
            deps = []
        }
        var config = {
            built: !isUserFirstRequire, //用r.js打包后,所有define会放到requirejs之前
            defineName: name
        }
        var args = [deps, factory, config]
        factory.require = function (url) {
            args.splice(2, 0, url)
            if (modules[url]) {
                modules[url].state = 3 //loaded
                var isCycle = false
                try {
                    isCycle = checkCycle(modules[url].deps, url)
                } catch (e) {
                }
                if (isCycle) {
                    avalon.error(url + "模块与之前的模块存在循环依赖，请不要直接用script标签引入" + url + "模块")
                }
            }
            delete factory.require //释放内存
            innerRequire.apply(null, args) //0,1,2 --> 1,2,0
        }
//根据标准,所有遵循W3C标准的浏览器,script标签会按标签的出现顺序执行。
//老的浏览器中，加载也是按顺序的：一个文件下载完成后，才开始下载下一个文件。
//较新的浏览器中（IE8+ 、FireFox3.5+ 、Chrome4+ 、Safari4+），为了减小请求时间以优化体验，
//下载可以是并行的，但是执行顺序还是按照标签出现的顺序。
//但如果script标签是动态插入的, 就未必按照先请求先执行的原则了,目测只有firefox遵守
//唯一比较一致的是,IE10+及其他标准浏览器,一旦开始解析脚本, 就会一直堵在那里,直接脚本解析完毕
//亦即，先进入loading阶段的script标签(模块)必然会先进入loaded阶段
        var url = config.built ? "unknown" : getCurrentScript()
        if (url) {
            var module = modules[url]
            if (module) {
                module.state = 2
            }
            factory.require(url)
        } else {//合并前后的safari，合并后的IE6-9走此分支
            factorys.push(factory)
        }
    }
//核心API之三 require.config(settings)
    innerRequire.config = kernel
    //核心API之四 define.amd 标识其符合AMD规范
    innerRequire.define.amd = modules

    //==========================对用户配置项进行再加工==========================
    var allpaths = kernel["orig.paths"] = {}
    var allmaps = kernel["orig.map"] = {}
    var allpackages = kernel["packages"] = []
    var allargs = kernel["orig.args"] = {}
    avalon.mix(plugins, {
        paths: function (hash) {
            avalon.mix(allpaths, hash)
            kernel.paths = makeIndexArray(allpaths)
        },
        map: function (hash) {
            avalon.mix(allmaps, hash)
            var list = makeIndexArray(allmaps, 1, 1)
            avalon.each(list, function (_, item) {
                item.val = makeIndexArray(item.val)
            })
            kernel.map = list
        },
        packages: function (array) {
            array = array.concat(allpackages)
            var uniq = {}
            var ret = []
            for (var i = 0, pkg; pkg = array[i++]; ) {
                pkg = typeof pkg === "string" ? {name: pkg} : pkg
                var name = pkg.name
                if (!uniq[name]) {
                    var url = joinPath(pkg.location || name, pkg.main || "main")
                    url = url.replace(rjsext, "")
                    ret.push(pkg)
                    uniq[name] = pkg.location = url
                    pkg.reg = makeMatcher(name)
                }
            }
            kernel.packages = ret.sort()
        },
        urlArgs: function (hash) {
            if (typeof hash === "string") {
                hash = {"*": hash}
            }
            avalon.mix(allargs, hash)
            kernel.urlArgs = makeIndexArray(allargs, 1)
        },
        baseUrl: function (url) {
            if (!isAbsUrl(url)) {
                var baseElement = head.getElementsByTagName("base")[0]
                if (baseElement) {
                    head.removeChild(baseElement)
                }
                var node = DOC.createElement("a")
                node.href = url
                url = getFullUrl(node, "href")
                if (baseElement) {
                    head.insertBefore(baseElement, head.firstChild)
                }
            }
            if (url.length > 3)
                kernel.baseUrl = url
        },
        shim: function (obj) {
            for (var i in obj) {
                var value = obj[i]
                if (Array.isArray(value)) {
                    value = obj[i] = {
                        deps: value
                    }
                }
                if (!value.exportsFn && (value.exports || value.init)) {
                    value.exportsFn = makeExports(value)
                }
            }
            kernel.shim = obj
        }

    })


    //==============================内部方法=================================
    function checkCycle(deps, nick) {
        //检测是否存在循环依赖
        for (var i = 0, id; id = deps[i++]; ) {
            if (modules[id].state !== 4 &&
                    (id === nick || checkCycle(modules[id].deps, nick))) {
                return true
            }
        }
    }

    function checkFail(node, onError, fuckIE) {
        var id = trimQuery(node.src) //检测是否死链
        node.onload = node.onreadystatechange = node.onerror = null
        if (onError || (fuckIE && modules[id] && !modules[id].state)) {
            setTimeout(function () {
                head.removeChild(node)
                node = null // 处理旧式IE下的循环引用问题
            })
            log("debug: 加载 " + id + " 失败" + onError + " " + (!modules[id].state))
        } else {
            return true
        }
    }

    function checkDeps() {
        //检测此JS模块的依赖是否都已安装完毕,是则安装自身
        loop: for (var i = loadings.length, id; id = loadings[--i]; ) {
            var obj = modules[id],
                    deps = obj.deps
            if (!deps)
                continue
            for (var j = 0, key; key = deps[j]; j++) {
                if (Object(modules[key]).state !== 4) {
                    continue loop
                }
            }
            //如果deps是空对象或者其依赖的模块的状态都是2
            if (obj.state !== 4) {
                loadings.splice(i, 1) //必须先移除再安装，防止在IE下DOM树建完后手动刷新页面，会多次执行它
                fireFactory(obj.id, obj.deps, obj.factory)
                checkDeps() //如果成功,则再执行一次,以防有些模块就差本模块没有安装好
            }
        }
    }

    var rreadyState = /complete|loaded/
    function loadJS(url, id, callback) {
        //通过script节点加载目标模块
        var node = DOC.createElement("script")
        node.className = subscribers //让getCurrentScript只处理类名为subscribers的script节点
        var supportLoad = "onload" in node
        var onEvent = supportLoad ? "onload" : "onreadystatechange"
        function onload() {
            var factory = factorys.pop()
            factory && factory.require(id)
            if (callback) {
                callback()
            }
            if (checkFail(node, false, !supportLoad)) {
                log("debug: 已成功加载 " + url)
                id && loadings.push(id)
                checkDeps()
            }
        }
        var index = 0, loadID
        node[onEvent] = supportLoad ? onload : function () {
            if (rreadyState.test(node.readyState)) {
                ++index
                if (index === 1) {
                    loadID = setTimeout(onload, 500)
                } else {
                    clearTimeout(loadID)
                    onload()
                }
            }
        }
        node.onerror = function () {
            checkFail(node, true)
        }

        head.insertBefore(node, head.firstChild) //chrome下第二个参数不能为null
        node.src = url //插入到head的第一个节点前，防止IE6下head标签没闭合前使用appendChild抛错
        log("debug: 正准备加载 " + url) //更重要的是IE6下可以收窄getCurrentScript的寻找范围
    }

    var resources = innerRequire.plugins = {
        //三大常用资源插件 js!, css!, text!, ready!
        ready: {
            load: noop
        },
        js: {
            load: function (name, req, onLoad) {
                var url = req.url
                var id = req.urlNoQuery
                var shim = kernel.shim[name.replace(rjsext, "")]
                if (shim) { //shim机制
                    innerRequire(shim.deps || [], function () {
                        var args = avalon.slice(arguments)
                        loadJS(url, id, function () {
                            onLoad(shim.exportsFn ? shim.exportsFn.apply(0, args) : void 0)
                        })
                    })
                } else {
                    loadJS(url, id)
                }
            }
        },
        css: {
            load: function (name, req, onLoad) {
                var url = req.url
                var node = DOC.createElement("link")
                node.rel = "stylesheet"
                node.href = url
                head.insertBefore(node, head.firstChild)
                log("debug: 已成功加载 " + url)
                onLoad()
            }
        },
        text: {
            load: function (name, req, onLoad) {
                var url = req.url
                var xhr = getXHR()
                xhr.onreadystatechange = function () {
                    if (xhr.readyState === 4) {
                        var status = xhr.status;
                        if (status > 399 && status < 600) {
                            avalon.error(url + " 对应资源不存在或没有开启 CORS")
                        } else {
                            log("debug: 已成功加载 " + url)
                            onLoad(xhr.responseText)
                        }
                    }
                }
                var time = "_=" + (new Date() - 0)
                var _url = url.indexOf("?") === -1 ? url + "?" + time : url + "&" + time
                xhr.open("GET", _url, true)
                if ("withCredentials" in xhr) {//这是处理跨域
                    xhr.withCredentials = true
                }
                xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest")//告诉后端这是AJAX请求
                xhr.send()
                log("debug: 正准备加载 " + url)
            }
        }
    }
    innerRequire.checkDeps = checkDeps

    var rquery = /(\?[^#]*)$/
    function trimQuery(url) {
        return (url || "").replace(rquery, "")
    }

    function isAbsUrl(path) {
        //http://stackoverflow.com/questions/10687099/how-to-test-if-a-url-string-is-absolute-or-relative
        return  /^(?:[a-z]+:)?\/\//i.test(String(path))
    }

    function getFullUrl(node, src) {
        return"1"[0] ? node[src] : node.getAttribute(src, 4)
    }

    function getCurrentScript() {
        // inspireb by https://github.com/samyk/jiagra/blob/master/jiagra.js
        var stack
        try {
            a.b.c() //强制报错,以便捕获e.stack
        } catch (e) { //safari5的sourceURL，firefox的fileName，它们的效果与e.stack不一样
            stack = e.stack
            if (!stack && window.opera) {
                //opera 9没有e.stack,但有e.Backtrace,但不能直接取得,需要对e对象转字符串进行抽取
                stack = (String(e).match(/of linked script \S+/g) || []).join(" ")
            }
        }
        if (stack) {
            /**e.stack最后一行在所有支持的浏览器大致如下:
             *chrome23:
             * at http://113.93.50.63/data.js:4:1
             *firefox17:
             *@http://113.93.50.63/query.js:4
             *opera12:http://www.oldapps.com/opera.php?system=Windows_XP
             *@http://113.93.50.63/data.js:4
             *IE10:
             *  at Global code (http://113.93.50.63/data.js:4:1)
             *  //firefox4+ 可以用document.currentScript
             */
            stack = stack.split(/[@ ]/g).pop() //取得最后一行,最后一个空格或@之后的部分
            stack = stack[0] === "(" ? stack.slice(1, -1) : stack.replace(/\s/, "") //去掉换行符
            return trimQuery(stack.replace(/(:\d+)?:\d+$/i, "")) //去掉行号与或许存在的出错字符起始位置
        }
        var nodes = head.getElementsByTagName("script") //只在head标签中寻找
        for (var i = nodes.length, node; node = nodes[--i]; ) {
            if (node.className === subscribers && node.readyState === "interactive") {
                var url = getFullUrl(node, "src")
                return node.className = trimQuery(url)
            }
        }
    }

    var rcallback = /^callback\d+$/
    function fireFactory(id, deps, factory) {
        var module = Object(modules[id])
        module.state = 4
        for (var i = 0, array = [], d; d = deps[i++]; ) {
            if (d === "exports") {
                var obj = module.exports || (module.exports = {})
                array.push(obj)
            } else {
                array.push(modules[d].exports)
            }
        }
        try {
            var ret = factory.apply(window, array)
        } catch (e) {
            log("执行[" + id + "]模块的factory抛错： " + e)
        }
        if (ret !== void 0) {
            module.exports = ret
        }
        if (rcallback.test(id)) {
            delete modules[id]
        }
        delete module.factory
        return ret
    }
    function toUrl(id) {
        if (id.indexOf(this.res + "!") === 0) {
            id = id.slice(this.res.length + 1) //处理define("css!style",[], function(){})的情况
        }
        var url = id
        //1. 是否命中paths配置项
        var usePath = 0
        var baseUrl = this.baseUrl
        var rootUrl = this.parentUrl || baseUrl
        eachIndexArray(id, kernel.paths, function (value, key) {
            url = url.replace(key, value)
            usePath = 1
        })
        //2. 是否命中packages配置项
        if (!usePath) {
            eachIndexArray(id, kernel.packages, function (value, key, item) {
                url = url.replace(item.name, item.location)
            })
        }
        //3. 是否命中map配置项
        if (this.mapUrl) {
            eachIndexArray(this.mapUrl, kernel.map, function (array) {
                eachIndexArray(url, array, function (mdValue, mdKey) {
                    url = url.replace(mdKey, mdValue)
                    rootUrl = baseUrl
                })
            })
        }
        var ext = this.ext
        if (ext && usePath && url.slice(-ext.length) === ext) {
            url = url.slice(0, -ext.length)
        }
        //4. 转换为绝对路径
        if (!isAbsUrl(url)) {
            rootUrl = this.built || /^\w/.test(url) ? baseUrl : rootUrl
            url = joinPath(rootUrl, url)
        }
        //5. 还原扩展名，query
        var urlNoQuery = url + ext
        url = urlNoQuery + this.query
        //6. 处理urlArgs
        eachIndexArray(id, kernel.urlArgs, function (value) {
            url += (url.indexOf("?") === -1 ? "?" : "&") + value;
        })
        this.url = url
        return  this.urlNoQuery = urlNoQuery
    }

    function makeIndexArray(hash, useStar, part) {
        //创建一个经过特殊算法排好序的数组
        var index = hash2array(hash, useStar, part)
        index.sort(descSorterByName)
        return index
    }

    function makeMatcher(prefix) {
        return new RegExp('^' + prefix + '(/|$)')
    }

    function makeExports(value) {
        return function () {
            var ret
            if (value.init) {
                ret = value.init.apply(window, arguments)
            }
            return ret || (value.exports && getGlobal(value.exports))
        }
    }


    function hash2array(hash, useStar, part) {
        var array = [];
        for (var key in hash) {
            if (ohasOwn.call(hash, key)) {
                var item = {
                    name: key,
                    val: hash[key]
                }
                array.push(item)
                item.reg = key === "*" && useStar ? /^/ : makeMatcher(key)
                if (part && key !== "*") {
                    item.reg = new RegExp('\/' + key.replace(/^\//, "") + '(/|$)')
                }
            }
        }
        return array
    }

    function eachIndexArray(moduleID, array, matcher) {
        array = array || []
        for (var i = 0, el; el = array[i++]; ) {
            if (el.reg.test(moduleID)) {
                matcher(el.val, el.name, el)
                return false
            }
        }
    }
    // 根据元素的name项进行数组字符数逆序的排序函数
    function descSorterByName(a, b) {
        var aaa = a.name
        var bbb = b.name
        if (bbb === "*") {
            return -1
        }
        if (aaa === "*") {
            return 1
        }
        return bbb.length - aaa.length
    }

    var rdeuce = /\/\w+\/\.\./
    function joinPath(a, b) {
        if (a.charAt(a.length - 1) !== "/") {
            a += "/"
        }
        if (b.slice(0, 2) === "./") { //相对于兄弟路径
            return a + b.slice(2)
        }
        if (b.slice(0, 2) === "..") { //相对于父路径
            a += b
            while (rdeuce.test(a)) {
                a = a.replace(rdeuce, "")
            }
            return a
        }
        if (b.slice(0, 1) === "/") {
            return a + b.slice(1)
        }
        return a + b
    }

    function getGlobal(value) {
        if (!value) {
            return value
        }
        var g = window
        value.split(".").forEach(function (part) {
            g = g[part]
        })
        return g
    }

    var mainNode = DOC.scripts[DOC.scripts.length - 1]
    var dataMain = mainNode.getAttribute("data-main")
    if (dataMain) {
        plugins.baseUrl(dataMain)
        var href = kernel.baseUrl
        kernel.baseUrl = href.slice(0, href.lastIndexOf("/") + 1)
        loadJS(href.replace(rjsext, "") + ".js")
    } else {
        var loaderUrl = trimQuery(getFullUrl(mainNode, "src"))
        kernel.baseUrl = loaderUrl.slice(0, loaderUrl.lastIndexOf("/") + 1)
    }
}// jshint ignore:line

/*********************************************************************
 *                           DOMReady                               *
 **********************************************************************/

var readyList = [], isReady
var fireReady = function(fn) {
    isReady = true
    if (innerRequire) {
        modules["domReady!"].state = 4
        innerRequire.checkDeps()
    }
    while(fn = readyList.shift()){
        fn(avalon)
    }
}

function doScrollCheck() {
    try { //IE下通过doScrollCheck检测DOM树是否建完
        root.doScroll("left")
        fireReady()
    } catch (e) {
        setTimeout(doScrollCheck)
    }
}

if (DOC.readyState === "complete") {
    setTimeout(fireReady) //如果在domReady之外加载
} else if (W3C) {
    DOC.addEventListener("DOMContentLoaded", fireReady)
} else {
    DOC.attachEvent("onreadystatechange", function() {
        if (DOC.readyState === "complete") {
            fireReady()
        }
    })
    try {
        var isTop = window.frameElement === null
    } catch (e) {
    }
    if (root.doScroll && isTop && window.external) {//fix IE iframe BUG
        doScrollCheck()
    }
}
avalon.bind(window, "load", fireReady)

avalon.ready = function(fn) {
    if (!isReady) {
        readyList.push(fn)
    } else {
        fn(avalon)
    }
}

avalon.config({
    loader: true
})

avalon.ready(function() {
    avalon.scan(DOC.body)
})

// Register as a named AMD module, since avalon can be concatenated with other
// files that may use define, but not via a proper concatenation script that
// understands anonymous AMD modules. A named AMD is safest and most robust
// way to register. Lowercase avalon is used because AMD module names are
// derived from file names, and Avalon is normally delivered in a lowercase
// file name. Do this after creating the global so that if an AMD module wants
// to call noConflict to hide this version of avalon, it will work.

// Note that for maximum portability, libraries that are not avalon should
// declare themselves as anonymous modules, and avoid setting a global if an
// AMD loader is present. avalon is a special case. For more information, see
// https://github.com/jrburke/requirejs/wiki/Updating-existing-libraries#wiki-anon
    if (typeof define === "function" && define.amd) {
        define("avalon", [], function() {
            return avalon
        })
    }
// Map over avalon in case of overwrite
    var _avalon = window.avalon
    avalon.noConflict = function(deep) {
        if (deep && window.avalon === avalon) {
            window.avalon = _avalon
        }
        return avalon
    }
// Expose avalon identifiers, even in AMD
// and CommonJS for browser emulators
    if (noGlobal === void 0) {
        window.avalon = avalon
    }
    return avalon

}));