avalon2
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an elegant efficient express mvvm framework
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<a href="../index.html">all files</a> / <a href="index.html">vmodel/</a> share.js
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<div class='fl pad1y space-right2'>
<span class="strong">93.08% </span>
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<span class="strong">91.04% </span>
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<span class="strong">100% </span>
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<span class='fraction'>13/13</span>
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<span class="strong">93.08% </span>
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<span class='fraction'>121/130</span>
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<span class="cline-any cline-yes">1×</span></td><td class="text"><pre class="prettyprint lang-js">import { avalon, platform, isObject, modern } from '../seed/core'
import { $$skipArray } from './reserved'
import { Mutation } from './Mutation'
import { Computed } from './Computed'
/**
* 这里放置ViewModel模块的共用方法
* avalon.define: 全框架最重要的方法,生成用户VM
* IProxy, 基本用户数据产生的一个数据对象,基于$model与vmodel之间的形态
* modelFactory: 生成用户VM
* canHijack: 判定此属性是否该被劫持,加入数据监听与分发的的逻辑
* createProxy: listFactory与modelFactory的封装
* createAccessor: 实现数据监听与分发的重要对象
* itemFactory: ms-for循环中产生的代理VM的生成工厂
* fuseFactory: 两个ms-controller间产生的代理VM的生成工厂
*/
avalon.define = function(definition) {
var $id = definition.$id
if (!$id) {
avalon.error('vm.$id must be specified')
}
if (avalon.vmodels[$id]) {
avalon.warn('error:[' + $id + '] had defined!')
}
var vm = platform.modelFactory(definition)
return avalon.vmodels[$id] = vm
}
/**
* 在末来的版本,avalon改用Proxy来创建VM,因此
*/
export function IProxy(definition, dd) {
avalon.mix(this, definition)
avalon.mix(this, $$skipArray)
this.$hashcode = avalon.makeHashCode('$')
this.$id = this.$id || this.$hashcode
this.$events = {
__dep__: dd || new Mutation(this.$id)
}
<span class="missing-if-branch" title="if path not taken" >I</span>if (avalon.config.inProxyMode) {
<span class="cstat-no" title="statement not covered" > delete this.$mutations</span>
<span class="cstat-no" title="statement not covered" > this.$accessors = {}</span>
<span class="cstat-no" title="statement not covered" > this.$computed = {}</span>
<span class="cstat-no" title="statement not covered" > this.$track = ''</span>
} else {
this.$accessors = {
$model: modelAccessor
}
}
if (dd === void 0) {
this.$watch = platform.watchFactory(this.$events)
this.$fire = platform.fireFactory(this.$events)
} else {
delete this.$watch
delete this.$fire
}
}
platform.modelFactory = function modelFactory(definition, dd) {
var $computed = definition.$computed || {}
delete definition.$computed
var core = new IProxy(definition, dd)
var $accessors = core.$accessors
var keys = []
platform.hideProperty(core, '$mutations', {})
for (let key in definition) {
if (key in $$skipArray)
continue
var val = definition[key]
keys.push(key)
if (canHijack(key, val)) {
$accessors[key] = createAccessor(key, val)
}
}
for (let key in $computed) {
<span class="missing-if-branch" title="if path not taken" >I</span>if (key in $$skipArray)
<span class="cstat-no" title="statement not covered" > continue</span>
var val = $computed[key]
if (typeof val === 'function') {
val = {
get: val
}
}
<span class="missing-if-branch" title="else path not taken" >E</span>if (val && val.get) {
val.getter = val.get
val.setter = val.set
avalon.Array.ensure(keys, key)
$accessors[key] = createAccessor(key, val, true)
}
}
//将系统API以unenumerable形式加入vm,
//添加用户的其他不可监听属性或方法
//重写$track
//并在IE6-8中增添加不存在的hasOwnPropert方法
var vm = platform.createViewModel(core, $accessors, core)
platform.afterCreate(vm, core, keys, !dd)
return vm
}
var $proxyItemBackdoorMap = {}
export function canHijack(key, val, $proxyItemBackdoor) {
if (key in $$skipArray)
return false
if (key.charAt(0) === '$') {
<span class="missing-if-branch" title="if path not taken" >I</span>if ($proxyItemBackdoor) {
<span class="cstat-no" title="statement not covered" > if (!$proxyItemBackdoorMap[key]) {</span>
<span class="cstat-no" title="statement not covered" > $proxyItemBackdoorMap[key] = 1</span>
<span class="cstat-no" title="statement not covered" > avalon.warn(`ms-for中的变量${key}不再建议以$为前缀`)</span>
}
<span class="cstat-no" title="statement not covered" > return true</span>
}
return false
}
if (val == null) {
avalon.warn('定义vmodel时' + key + '的属性值不能为null undefine')
return true
}
if (/error|date|function|regexp/.test(avalon.type(val))) {
return false
}
return !(val && val.nodeName && val.nodeType)
}
export function createProxy(target, dd) {
if (target && target.$events) {
return target
}
var vm
if (Array.isArray(target)) {
vm = platform.listFactory(target, false, dd)
} else if (isObject(target)) {
vm = platform.modelFactory(target, dd)
}
return vm
}
platform.createProxy = createProxy
platform.itemFactory = function itemFactory(before, after) {
var keyMap = before.$model
var core = new IProxy(keyMap)
var state = avalon.shadowCopy(core.$accessors, before.$accessors) //防止互相污染
var data = after.data
//core是包含系统属性的对象
//keyMap是不包含系统属性的对象, keys
for (var key in data) {
var val = keyMap[key] = core[key] = data[key]
state[key] = createAccessor(key, val)
}
var keys = Object.keys(keyMap)
var vm = platform.createViewModel(core, state, core)
platform.afterCreate(vm, core, keys)
return vm
}
function createAccessor(key, val, isComputed) {
var mutation = null
var Accessor = isComputed ? Computed : Mutation
return {
get: function Getter() {
if (!mutation) {
mutation = new Accessor(key, val, this)
}
return mutation.get()
},
set: function Setter(newValue) {
if (!mutation) {
mutation = new Accessor(key, val, this)
}
mutation.set(newValue)
},
enumerable: true,
configurable: true
}
}
platform.fuseFactory = function fuseFactory(before, after) {
var keyMap = avalon.mix(before.$model, after.$model)
var core = new IProxy(avalon.mix(keyMap, {
$id: before.$id + after.$id
}))
var state = avalon.mix(core.$accessors,
before.$accessors, after.$accessors) //防止互相污染
var keys = Object.keys(keyMap)
//将系统API以unenumerable形式加入vm,并在IE6-8中添加hasOwnPropert方法
var vm = platform.createViewModel(core, state, core)
platform.afterCreate(vm, core, keys, false)
return vm
}
function toJson(val) {
var xtype = avalon.type(val)
if (xtype === 'array') {
var array = []
for (var i = 0; i < val.length; i++) {
array[i] = toJson(val[i])
}
return array
} else if (xtype === 'object') {
if (typeof val.$track === 'string') {
var obj = {}
var arr = val.$track.match(/[^☥]+/g) || []
arr.forEach(function(i) {
var value = val[i]
obj[i] = value && value.$events ? toJson(value) : value
})
return obj
}
}
return val
}
var modelAccessor = {
get: function() {
return toJson(this)
},
set: avalon.noop,
enumerable: false,
configurable: true
}
platform.toJson = toJson
platform.modelAccessor = modelAccessor</pre></td></tr>
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