add NodeViewWrapper and NodeViewContent to vue-2

packages/vue-2/src/NodeViewWrapper.ts

@@ -0,0 +1,30 @@
+import Vue from 'vue'
+
+export const NodeViewWrapper = Vue.extend({
+  props: {
+    as: {
+      type: String,
+      default: 'div',
+    },
+  },
+
+  inject: ['onDragStart'],
+
+  render(createElement) {
+    return createElement(
+      this.as, {
+        style: {
+          whiteSpace: 'normal',
+        },
+        attrs: {
+          'data-node-view-wrapper': '',
+        },
+        on: {
+          // @ts-ignore
+          dragstart: this.onDragStart,
+        },
+      },
+      this.$slots.default,
+    )
+  },
+})