fix kkFile预览提出公共方法，加水印

src/components/UploadFile.vue

@@ -54,6 +54,7 @@ import { downloadFile, getFileAccessHttpUrl } from '@/api/manage'
 import { getFileInfo } from '@/api/api'
 import { previewPdf } from '@/utils/previewPdf'
 import Vue from 'vue'
+import { kkFilePreview } from '../utils/kkFilePreview'
 
 const FILE_TYPE_ALL = 'all'
 const FILE_TYPE_IMG = 'image'
@@ -327,8 +328,7 @@ export default {
         return
       }
       // 其余可预览文件仍使用KKFile进行预览
-      const url = `${window._CONFIG.onlinePreviewDomainURL}?url=${encodeURIComponent(Base64.encode(fileFullUrl))}`
-      window.open(url)
+      kkFilePreview(fileFullUrl)
     },
     handleDownload (file) {
       // 下载文件