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bridge.js
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bridge.js
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var cache = require('./cache')
var redirector = require('./redirector')
var conf = require('./conf')
var fns = require('./fns')
var navigate = route({type: 'navigateTo'})
var redirect = route({type: 'redirectTo'})
var switchTab = route({type: 'switchTab'})
var reLaunch = route({type: 'reLaunch'})
var routeMethods = {navigate, redirect, switchTab, reLaunch}
var bindNavigate = clickDelegate('navigate')
var bindRedirect = clickDelegate('redirect')
var bindSwitch = clickDelegate('switchTab')
var bindReLaunch = clickDelegate('reLaunch')
var channel = {}
var dispatcher
var getRef
module.exports = {
channel,
dispatcher: function (d) {
dispatcher = d
},
ref: function (fn) {
getRef = fn
},
mount: function (e) {
var payload = e.detail
switch(payload.type) {
case 'attached':
let ref = getRef && getRef(payload.id)
if (!ref) return
let refName = ref._$ref
if (refName && this.$refs) {
this.$refs[refName] = ref
}
ref._$attached(this)
break
case 'event:call':
let method = this[payload.method]
method && method.apply(this, payload.args)
default:
break
}
},
redirectDelegate: function (emitter, dispatcher) {
;['navigateTo', 'redirectTo', 'switchTab', 'reLaunch'].forEach(function (k) {
emitter.on(k, function (url) {
var name = getPageName(url)
name && dispatcher.emit(k+':'+name, url, fns.queryParse(url.split('?')[1]))
})
})
},
methods: function (ctx) {
/**
* 缓存
*/
ctx.$cache = cache
ctx.$session = cache.session
/**
* 存一次,取一次
*/
ctx.$put = put
/**
* 只能被取一次
*/
ctx.$take = take
/**
* 实例引用集合
*/
ctx.$refs = {}
/**
* 路由方法
*/
ctx.$route = ctx.$navigate = navigate
ctx.$redirect = redirect
ctx.$switch = switchTab
ctx.$launch = reLaunch
ctx.$back = back
/**
* 页面预加载
*/
ctx.$preload = preload
/**
* 点击跳转代理
*/
ctx.$bindRoute = ctx.$bindNavigate = bindNavigate
ctx.$bindRedirect = bindRedirect
ctx.$bindSwitch = bindSwitch
ctx.$bindReLaunch = bindReLaunch
/**
* 页面信息
*/
ctx.$curPage = getPage
ctx.$curPageName = curPageName
},
getPageName
}
/**
* Navigate handler
*/
function route ({type}) {
// url: $page[?name=value]
return function (url, config) {
var parts = url.split(/\?/)
var pagepath = parts[0]
if (/^[\w\-]+$/.test(pagepath)) {
pagepath = (conf.get('customRouteResolve') || conf.get('routeResolve'))(pagepath)
}
if (!pagepath) {
throw new Error('Invalid path:', pagepath)
}
config = config || {}
// append querystring
config.url = pagepath + (parts[1] ? '?' + parts[1] : '')
redirector[type](config)
}
}
function clickDelegate(type) {
var _route = routeMethods[type]
return function (e) {
if (!e) return
var dataset = e.currentTarget.dataset
var before = dataset.before
var after = dataset.after
var url = dataset.url
var ctx = this
try {
if (ctx && before && ctx[before]) ctx[before].call(ctx, e)
} finally {
if (!url) return
_route(url)
if (ctx && after && ctx[after]) ctx[after].call(ctx, e)
}
}
}
function back(delta) {
wx.navigateBack({
delta: delta || 1
})
}
function preload(url){
var name = getPageName(url)
name && dispatcher && dispatcher.emit('preload:'+name, url, fns.queryParse(url.split('?')[1]))
}
function getPage() {
return getCurrentPages().slice(0).pop()
}
function getPageName(url) {
var m = /^[\w\-]+(?=\?|$)/.exec(url)
return m ? m[0] : conf.get('nameResolve')(url)
}
function curPageName () {
var route = getPage().route
if (!route) return ''
return getPageName(route)
}
function put (key, value) {
channel[key] = value
return this
}
function take (key) {
var v = channel[key]
// 释放引用
channel[key] = null
return v
}