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+import { deepClone } from '@/benyun/utils/index'
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+
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+const componentChild = {}
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+/**
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+ * 将./slots中的文件挂载到对象componentChild上
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+ * 文件名为key,对应JSON配置中的__config__.tag
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+ * 文件内容为value,解析JSON配置中的__slot__
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+ */
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+const slotsFiles = require.context('./slots', false, /\.js$/)
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+const keys = slotsFiles.keys() || []
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+keys.forEach(key => {
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+ const tag = key.replace(/^\.\/(.*)\.\w+$/, '$1')
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+ const value = slotsFiles(key).default
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+ componentChild[tag] = value
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+})
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+
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+function vModel(dataObject, defaultValue) {
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+ dataObject.props.value = defaultValue
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+
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+ dataObject.on.input = val => {
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+ this.$emit('input', val)
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+ }
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+}
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+
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+function mountSlotFiles(h, confClone, children) {
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+ const childObjs = componentChild[confClone.__config__.tag]
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+ if (childObjs) {
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+ Object.keys(childObjs).forEach(key => {
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+ const childFunc = childObjs[key]
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+ if (confClone.__slot__ && confClone.__slot__[key]) {
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+ children.push(childFunc(h, confClone, key))
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+ }
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+ })
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+ }
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+}
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+
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+function emitEvents(confClone) {
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+ ['on', 'nativeOn'].forEach(attr => {
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+ const eventKeyList = Object.keys(confClone[attr] || {})
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+ eventKeyList.forEach(key => {
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+ const val = confClone[attr][key]
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+ if (typeof val === 'string') {
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+ confClone[attr][key] = event => this.$emit(val, event)
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+ }
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+ })
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+ })
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+}
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+
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+function buildDataObject(confClone, dataObject) {
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+ Object.keys(confClone).forEach(key => {
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+ const val = confClone[key]
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+ if (key === '__vModel__') {
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+ vModel.call(this, dataObject, confClone.__config__.defaultValue)
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+ } else if (dataObject[key] !== undefined) {
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+ if (dataObject[key] === null
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+ || dataObject[key] instanceof RegExp
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+ || ['boolean', 'string', 'number', 'function'].includes(typeof dataObject[key])) {
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+ dataObject[key] = val
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+ } else if (Array.isArray(dataObject[key])) {
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+ dataObject[key] = [...dataObject[key], ...val]
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+ } else {
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+ dataObject[key] = { ...dataObject[key], ...val }
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+ }
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+ } else {
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+ dataObject.attrs[key] = val
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+ }
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+ })
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+
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+ // 清理属性
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+ clearAttrs(dataObject)
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+}
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+
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+function clearAttrs(dataObject) {
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+ delete dataObject.attrs.__config__
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+ delete dataObject.attrs.__slot__
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+ delete dataObject.attrs.__methods__
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+}
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+
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+function makeDataObject() {
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+ // 深入数据对象:
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+ // https://cn.vuejs.org/v2/guide/render-function.html#%E6%B7%B1%E5%85%A5%E6%95%B0%E6%8D%AE%E5%AF%B9%E8%B1%A1
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+ return {
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+ class: {},
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+ attrs: {},
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+ props: {},
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+ domProps: {},
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+ nativeOn: {},
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+ on: {},
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+ style: {},
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+ directives: [],
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+ scopedSlots: {},
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+ slot: null,
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+ key: null,
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+ ref: null,
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+ refInFor: true
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+ }
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+}
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+
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+export default {
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+ props: {
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+ conf: {
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+ type: Object,
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+ required: true
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+ }
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+ },
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+ render(h) {
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+ const dataObject = makeDataObject()
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+ const confClone = deepClone(this.conf)
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+ const children = this.$slots.default || []
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+
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+ // 如果slots文件夹存在与当前tag同名的文件,则执行文件中的代码
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+ mountSlotFiles.call(this, h, confClone, children)
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+
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+ // 将字符串类型的事件,发送为消息
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+ emitEvents.call(this, confClone)
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+
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+ // 将json表单配置转化为vue render可以识别的 “数据对象(dataObject)”
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+ buildDataObject.call(this, confClone, dataObject)
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+
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+ return h(this.conf.__config__.tag, dataObject, children)
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+ }
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+}
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