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">directives/duplex/</a> share.js
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<div class='fl pad1y space-right2'>
<span class="strong">100% </span>
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<span class="strong">89.55% </span>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import { avalon, createFragment } from '../../seed/core'
import { rcheckedType } from '../../dom/rcheckedType'
import { lookupOption } from './option'
import { addScope, makeHandle } from '../../parser/index'
import { fromString } from '../../vtree/fromString'
var rchangeFilter = /\|\s*change\b/
var rdebounceFilter = /\|\s*debounce(?:\(([^)]+)\))?/
export function duplexBeforeInit() {
var expr = this.expr
if (rchangeFilter.test(expr)) {
this.isChanged = true
expr = expr.replace(rchangeFilter, '')
}
var match = expr.match(rdebounceFilter)
if (match) {
expr = expr.replace(rdebounceFilter, '')
<span class="missing-if-branch" title="else path not taken" >E</span>if (!this.isChanged) {
this.debounceTime = parseInt(match[1], 10) || 300
}
}
this.expr = expr
}
export function duplexInit() {
var expr = this.expr
var node = this.node
var etype = node.props.type
this.parseValue = parseValue
//处理数据转换器
var parsers = this.param, dtype
var isChecked = false
parsers = parsers ? parsers.split('-').map(function (a) {
if (a === 'checked') {
isChecked = true
}
return a
}) : []
node.duplex = this
if (rcheckedType.test(etype) && isChecked) {
//如果是radio, checkbox,判定用户使用了checked格式函数没有
parsers = []
dtype = 'radio'
this.isChecked = isChecked
}
this.parsers = parsers
if (!/input|textarea|select/.test(node.nodeName)) {
<span class="missing-if-branch" title="else path not taken" >E</span>if ('contenteditable' in node.props) {
dtype = 'contenteditable'
}
} else if (!dtype) {
dtype = node.nodeName === 'select' ? 'select' :
etype === 'checkbox' ? 'checkbox' :
etype === 'radio' ? 'radio' :
'input'
}
this.dtype = dtype
var isChanged = false, debounceTime = 0
//判定是否使用了 change debounce 过滤器
// this.isChecked = /boolean/.test(parsers)
if (dtype !== 'input' && dtype !== 'contenteditable') {
delete this.isChange
delete this.debounceTime
} else <span class="missing-if-branch" title="else path not taken" >E</span>if (!this.isChecked) {
this.isString = true
}
var cb = node.props['data-duplex-changed']
if (cb) {
var arr = addScope(cb, 'xx')
var body = makeHandle(arr[0])
this.userCb = new Function('$event', 'var __vmodel__ = this\nreturn ' + body)
}
}
export function duplexDiff(newVal, oldVal) {
if (Array.isArray(newVal)) {
<span class="missing-if-branch" title="else path not taken" >E</span>if (newVal + '' !== this.compareVal) {
this.compareVal = newVal + ''
return true
}
} else {
newVal = this.parseValue(newVal)
if (!this.isChecked) {
this.value = newVal += ''
}
if (newVal !== this.compareVal) {
this.compareVal = newVal
return true
}
}
}
export function duplexValidate(node, vdom) {
//将当前虚拟DOM的duplex添加到它上面的表单元素的validate指令的fields数组中
var field = vdom.duplex
var rules = vdom.rules
if (rules && !field.validator) {
while (node && node.nodeType === 1) {
var validator = node._ms_validate_
if (validator) {
field.rules = rules
field.validator = validator
<span class="missing-if-branch" title="else path not taken" >E</span>if (avalon.Array.ensure(validator.fields, field)) {
validator.addField(field)
}
break
}
node = node.parentNode
}
}
}
export var valueHijack = true
try { //#272 IE9-IE11, firefox
var setters = {}
var aproto = HTMLInputElement.prototype
var bproto = HTMLTextAreaElement.prototype
var newSetter = function (value) { // jshint ignore:line
setters[this.tagName].call(this, value)
var data = this._ms_duplex_
if (!this.caret && data && data.isString) {
data.duplexCb.call(this, { type: 'setter' })
}
}
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
})
valueHijack = false
} 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
}
function parseValue(val) {
for (var i = 0, k; k = this.parsers[i++];) {
var fn = avalon.parsers[k]
<span class="missing-if-branch" title="else path not taken" >E</span>if (fn) {
val = fn.call(this, val)
}
}
return val
}
export var updateView = {
input: function () {//处理单个value值处理
this.node.props.value = this.value + ''
this.dom.value = this.value
},
updateChecked: function (vdom, checked) {
<span class="missing-if-branch" title="else path not taken" >E</span>if (vdom.dom) {
vdom.dom.defaultChecked = vdom.dom.checked = checked
}
},
radio: function () {//处理单个checked属性
var node = this.node
var nodeValue = node.props.value
var checked
if (this.isChecked) {
checked = !!this.value
} else {
checked = this.value + '' === nodeValue
}
node.props.checked = checked
updateView.updateChecked(node, checked)
},
checkbox: function () {//处理多个checked属性
var node = this.node
var props = node.props
var value = props.value+''
var values = [].concat(this.value)
var checked = values.some(function (el) {
return el + ''=== value
})
props.defaultChecked = props.checked = checked
updateView.updateChecked(node, checked)
},
select: function () {//处理子级的selected属性
var a = Array.isArray(this.value) ?
this.value.map(String) : this.value + ''
lookupOption(this.node, a)
},
contenteditable: function () {//处理单个innerHTML
var vnodes = fromString(this.value)
var fragment = createFragment()
for (var i = 0, el; el = vnodes[i++];) {
var child = avalon.vdom(el, 'toDOM')
fragment.appendChild(child)
}
avalon.clearHTML(this.dom).appendChild(fragment)
var list = this.node.children
list.length = 0
Array.prototype.push.apply(list, vnodes)
this.duplexCb.call(this.dom)
}
}
</pre></td></tr>
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