<script>
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import { deepClone } from '@/utils/index'
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import render from '@/components/render/render.js'
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const ruleTrigger = {
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'el-input': 'blur',
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'el-input-number': 'blur',
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'el-select': 'change',
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'el-radio-group': 'change',
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'el-checkbox-group': 'change',
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'el-cascader': 'change',
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'el-time-picker': 'change',
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'el-date-picker': 'change',
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'el-rate': 'change'
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}
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const layouts = {
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colFormItem(h, scheme) {
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const config = scheme.__config__
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const listeners = buildListeners.call(this, scheme)
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let labelWidth = config.labelWidth ? `${config.labelWidth}px` : null
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if (config.showLabel === false) labelWidth = '0'
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return (
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<el-col span={config.span}>
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<el-form-item label-width={labelWidth} prop={scheme.__vModel__}
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label={config.showLabel ? config.label : ''}>
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<render conf={scheme} on={listeners} />
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</el-form-item>
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</el-col>
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)
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},
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rowFormItem(h, scheme) {
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let child = renderChildren.apply(this, arguments)
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if (scheme.type === 'flex') {
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child = <el-row type={scheme.type} justify={scheme.justify} align={scheme.align}>
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{child}
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</el-row>
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}
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return (
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<el-col span={scheme.span}>
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<el-row gutter={scheme.gutter}>
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{child}
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</el-row>
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</el-col>
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)
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}
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}
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function renderFrom(h) {
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const { formConfCopy } = this
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return (
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<el-row gutter={formConfCopy.gutter}>
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<el-form
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size={formConfCopy.size}
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label-position={formConfCopy.labelPosition}
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disabled={formConfCopy.disabled}
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label-width={`${formConfCopy.labelWidth}px`}
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ref={formConfCopy.formRef}
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// model不能直接赋值 https://github.com/vuejs/jsx/issues/49#issuecomment-472013664
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props={{ model: this[formConfCopy.formModel] }}
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rules={this[formConfCopy.formRules]}
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>
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{renderFormItem.call(this, h, formConfCopy.fields)}
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{formConfCopy.formBtns && formBtns.call(this, h)}
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</el-form>
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</el-row>
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)
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}
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function formBtns(h) {
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return <el-col>
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<el-form-item size="large">
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<el-button type="primary" onClick={this.submitForm}>提交</el-button>
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<el-button onClick={this.resetForm}>重置</el-button>
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</el-form-item>
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</el-col>
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}
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function renderFormItem(h, elementList) {
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return elementList.map(scheme => {
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const config = scheme.__config__
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const layout = layouts[config.layout]
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if (layout) {
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return layout.call(this, h, scheme)
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}
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throw new Error(`没有与${config.layout}匹配的layout`)
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})
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}
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function renderChildren(h, scheme) {
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const config = scheme.__config__
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if (!Array.isArray(config.children)) return null
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return renderFormItem.call(this, h, config.children)
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}
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function setValue(event, config, scheme) {
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this.$set(config, 'defaultValue', event)
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this.$set(this[this.formConf.formModel], scheme.__vModel__, event)
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}
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function buildListeners(scheme) {
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const config = scheme.__config__
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const methods = this.formConf.__methods__ || {}
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const listeners = {}
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// 给__methods__中的方法绑定this和event
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Object.keys(methods).forEach(key => {
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listeners[key] = event => methods[key].call(this, event)
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})
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// 响应 render.js 中的 vModel $emit('input', val)
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listeners.input = event => setValue.call(this, event, config, scheme)
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return listeners
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}
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export default {
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components: {
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render
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},
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props: {
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formConf: {
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type: Object,
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required: true
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}
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},
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data() {
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const data = {
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formConfCopy: deepClone(this.formConf),
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[this.formConf.formModel]: {},
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[this.formConf.formRules]: {}
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}
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this.initFormData(data.formConfCopy.fields, data[this.formConf.formModel])
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this.buildRules(data.formConfCopy.fields, data[this.formConf.formRules])
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return data
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},
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methods: {
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initFormData(componentList, formData) {
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componentList.forEach(cur => {
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const config = cur.__config__
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if (cur.__vModel__) formData[cur.__vModel__] = config.defaultValue
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if (config.children) this.initFormData(config.children, formData)
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})
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},
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buildRules(componentList, rules) {
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componentList.forEach(cur => {
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const config = cur.__config__
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if (Array.isArray(config.regList)) {
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if (config.required) {
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const required = { required: config.required, message: cur.placeholder }
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if (Array.isArray(config.defaultValue)) {
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required.type = 'array'
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required.message = `请至少选择一个${config.label}`
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}
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required.message === undefined && (required.message = `${config.label}不能为空`)
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config.regList.push(required)
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}
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rules[cur.__vModel__] = config.regList.map(item => {
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item.pattern && (item.pattern = eval(item.pattern))
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item.trigger = ruleTrigger && ruleTrigger[config.tag]
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return item
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})
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}
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if (config.children) this.buildRules(config.children, rules)
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})
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},
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resetForm() {
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this.formConfCopy = deepClone(this.formConf)
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this.$refs[this.formConf.formRef].resetFields()
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},
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submitForm() {
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this.$refs[this.formConf.formRef].validate(valid => {
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if (!valid) return false
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// 触发sumit事件
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this.$emit('submit', this[this.formConf.formModel])
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return true
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})
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}
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},
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render(h) {
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return renderFrom.call(this, h)
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}
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}
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</script>
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