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">parser/</a> index.js
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<span class="strong">98.63% </span>
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<span class='fraction'>72/73</span>
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<span class="strong">88.89% </span>
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<span class="strong">100% </span>
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<span class='fraction'>12/12</span>
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<span class="strong">98.63% </span>
<span class="quiet">Lines</span>
<span class='fraction'>72/73</span>
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<div class='fl pad1y'>
<span class="strong">2 statements, 1 function, 3 branches</span>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import { avalon, msie, Cache } from '../seed/core'
import { clearString, stringPool, fill, rfill, dig } from '../vtree/clearString'
var keyMap = avalon.oneObject("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")
export var skipMap = avalon.mix({
Math: 1,
Date: 1,
$event: 1,
window: 1,
__vmodel__: 1,
avalon: 1
}, keyMap)
var rvmKey = /(^|[^\w\u00c0-\uFFFF_])(@|##)(?=[$\w])/g
var ruselessSp = /\s*(\.|\|)\s*/g
var rshortCircuit = /\|\|/g
var brackets = /\(([^)]*)\)/
var rpipeline = /\|(?=\?\?)/
var rregexp = /(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\\\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})]))/g
var robjectProp = /\.[\w\.\$]+/g //对象的属性 el.xxx 中的xxx
var robjectKey = /(\{|\,)\s*([\$\w]+)\s*:/g //对象的键名与冒号 {xxx:1,yyy: 2}中的xxx, yyy
var rfilterName = /\|(\w+)/g
var rlocalVar = /[$a-zA-Z_][$a-zA-Z0-9_]*/g
var exprCache = new Cache(300)
function addScopeForLocal(str) {
return str.replace(robjectProp, dig).
replace(rlocalVar, function (el) {
if (!skipMap[el]) {
return "__vmodel__." + el
}
return el
})
}
export function addScope(expr, type) {
var cacheKey = expr + ':' + type
var cache = exprCache.get(cacheKey)
if (cache) {
return cache.slice(0)
}
stringPool.map = {}
//https://github.com/RubyLouvre/avalon/issues/1849
var input = expr.replace(rregexp, function(a,b){
return b+dig(a.slice(b.length))
}) //移除所有正则
input = clearString(input) //移除所有字符串
input = input.replace(rshortCircuit, dig). //移除所有短路运算符
replace(ruselessSp, '$1'). //移除.|两端空白
replace(robjectKey, function(_,a,b){ //移除所有键名
return a+dig(b)+':' //比如 ms-widget="[{is:'ms-address-wrap', $id:'address'}]"这样极端的情况
}).
replace(rvmKey, '$1__vmodel__.'). //转换@与##为__vmodel__
replace(rfilterName, function (a, b) { //移除所有过滤器的名字
return '|' + dig(b)
})
input = addScopeForLocal(input) //在本地变量前添加__vmodel__
var filters = input.split(rpipeline) //根据管道符切割表达式
var body = filters.shift().replace(rfill, fill).trim()
<span class="missing-if-branch" title="if path not taken" >I</span>if (/\?\?\d/.test(body)) {
<span class="cstat-no" title="statement not covered" > body = body.replace(rfill, fill)</span>
}
if (filters.length) {
filters = filters.map(function (filter) {
var bracketArgs = ''
filter = filter.replace(brackets, function (a, b) {
<span class="missing-if-branch" title="else path not taken" >E</span>if (/\S/.test(b)) {
bracketArgs += ',' + b //还原字符串,正则,短路运算符
}
return ''
})
var arg = '[' + avalon.quote(filter.trim()) + bracketArgs + ']'
return arg
})
filters = 'avalon.composeFilters(' + filters + ')(__value__)'
filters = filters.replace(rfill, fill)
} else {
filters = ''
}
return exprCache.put(cacheKey, [body, filters])
}
var rhandleName = /^__vmodel__\.[$\w\.]+$/
var rfixIE678 = /__vmodel__\.([^(]+)\(([^)]*)\)/
export function makeHandle(body) {
if (rhandleName.test(body)) {
body = body + '($event)'
}
/* istanbul ignore if */
<span class="skip-if-branch" title="if path not taken" >I</span>if (msie < 9) {
<span class="cstat-skip" title="statement not covered" > body = body.replace(rfixIE678, <span class="fstat-skip" title="function not covered" >function (a, b, c) {</span></span>
<span class="cstat-skip" title="statement not covered" > return '__vmodel__.' + b + '.call(__vmodel__' + (/\S/.test(c) ? ',' + c : '') + ')'</span>
})
}
return body
}
export function createGetter(expr, type) {
var arr = addScope(expr, type), body
if (!arr[1]) {
body = arr[0]
} else {
body = arr[1].replace(/__value__\)$/, arr[0] + ')')
}
try {
return new Function('__vmodel__', 'return ' + body + ';')
/* istanbul ignore next */
} catch (e) {
avalon.log('parse getter: [', expr, body, ']error')
return avalon.noop
}
}
/**
* 生成表达式设值函数
* @param {String} expr
*/
export function createSetter(expr, type) {
var arr = addScope(expr, type)
var body = 'try{ ' + arr[0] + ' = __value__}catch(e){}'
try {
return new Function('__vmodel__', '__value__', body + ';')
/* istanbul ignore next */
} catch (e) {
avalon.log('parse setter: ', expr, ' error')
return avalon.noop
}
}</pre></td></tr>
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