Create form.js

add form component.

src/platforms/app-plus-nvue/runtime/components/form.js

+import {
+  emitter,
+  listeners
+} from '../mixins'
+
+const NATIVE_COMPONENT_TYPES = ['u-input', 'u-textarea']
+
+function getForm (weex) {
+  const modulePlus = weex.requireModule('plus')
+  return {
+    name: 'Form',
+    mixins: [emitter, listeners],
+    data: function data () {
+      return {
+        childrenList: []
+      }
+    },
+    listeners: {
+      '@form-submit': '_onSubmit',
+      '@form-reset': '_onReset',
+      '@form-group-update': '_formGroupUpdateHandler'
+    },
+    methods: {
+      _onSubmit ($event) {
+        const data = this._getNativeFormData() || {}
+        this.childrenList.forEach(function (vm) {
+          if (vm._getFormData && vm._getFormData().key) {
+            data[vm._getFormData().key] = vm._getFormData().value
+          }
+        })
+        this.$trigger('submit', {
+          value: data
+        })
+      },
+      _onReset ($event) {
+        this.$trigger('reset', {})
+        this._getNativeFormData(true)
+        this.childrenList.forEach(function (vm) {
+          vm._resetFormData && vm._resetFormData()
+        })
+      },
+      _formGroupUpdateHandler ($event) {
+        if ($event.type === 'add') {
+          this.childrenList.push($event.vm)
+        }
+        else {
+          const index = this.childrenList.indexOf($event.vm)
+          this.childrenList.splice(index, 1)
+        }
+      },
+      _getNativeFormData (isClear) {
+        const data = {}
+
+        function find (nodes) {
+          nodes.forEach(function (node) {
+            if (NATIVE_COMPONENT_TYPES.indexOf(node.tag) >= 0 && node.data.attrs && node.data.attrs['name']) {
+              if (isClear) {
+                node.elm.setValue('')
+              }
+              else {
+                data[node.data.attrs['name']] = modulePlus.getValue(node.elm.nodeId)
+              }
+            }
+            if (node.children) {
+              find(node.children)
+            }
+          })
+        }
+
+        find(this.$vnode.componentOptions.children)
+
+        return data
+      }
+    },
+    render (createElement) {
+      const _vm = this
+      return createElement('view', _vm._g({}, _vm.$listeners), [_vm._t('default')], 2)
+    }
+  }
+}
+
+export default function init (Vue, weex) {
+  Vue.component('form', getForm(weex))
+}