import {
transactionStart,
transactionEnd,
reportObserved,
propagateChanged
} from './transaction'
import {
avalon,
platform
} from '../seed/core'
/**
*
与Computed等共享UUID
*/
export let obid = 1
export function Mutation(expr, value, vm) { //构造函数
this.expr = expr
if (value) {
var childVm = platform.createProxy(value, this)
if (childVm) {
value = childVm
}
}
this.value = value
this.vm = vm
try {
vm.$mutations[expr] = this
} catch (ignoreIE) {}
this.uuid = ++obid
this.updateVersion()
this.mapIDs = {}
this.observers = []
}
Mutation.prototype = {
get() {
if (avalon.trackingAction) {
this.collect() //被收集
var childOb = this.value
if (childOb && childOb.$events) {
if (Array.isArray(childOb)) {
childOb.forEach(function(item) {
if (item && item.$events) {
item.$events.__dep__.collect()
}
})
} else if (avalon.deepCollect) {
for (var key in childOb) {
Eif (childOb.hasOwnProperty(key)) {
var collectIt = childOb[key]
}
}
}
}
}
return this.value
},
collect() {
avalon.track(name, '被收集')
reportObserved(this)
},
updateVersion() {
this.version = Math.random() + Math.random()
},
notify() {
transactionStart()
propagateChanged(this)
transactionEnd()
},
set(newValue) {
var oldValue = this.value
if (newValue !== oldValue) {
if (avalon.isObject(newValue)) {
var hash = oldValue && oldValue.$hashcode
var childVM = platform.createProxy(newValue, this)
Eif (childVM) {
if (hash) {
childVM.$hashcode = hash
}
newValue = childVM
}
}
this.value = newValue
this.updateVersion()
this.notify()
}
}
} |