feat: make drag-file-upload support pdf file type

@@ -7,23 +7,26 @@
       :progress="uploadList[0].showProgress"
       :percentage="uploadList[0].percentage"
       :remove="true"
-            @remove-image="handleRemove"></image-purview>
+      @remove-image="handleRemove"
+    ></image-purview>
 
-        <div class="upload-box"  v-show="!uploadList[0]">
-            <Upload ref="upload"
+    <div v-show="!uploadList[0]" class="upload-box">
+      <Upload
+        ref="upload"
         :show-upload-list="false"
-                    :data="{bucket: bucket}"
+        :data="{ bucket: bucket }"
         :on-success="handleSuccess"
         :on-error="handleError"
         :default-file-list="defaultList"
-                    :format="['jpg','jpeg','png']"
+        :format="format"
         :max-size="2048"
         :on-format-error="handleFormatError"
         :on-exceeded-size="handleMaxSize"
-                    action="/Api/upload/image">
-                <Icon type="ios-cloud-upload-outline" title="上传图片"></Icon>
+        action="/Api/upload/image"
+      >
+        <Icon type="ios-cloud-upload-outline" :title="uploadIconTitle"></Icon>
       </Upload>
-            <Icon type="ios-cloud-outline" v-if="skn" title="调用图片服务" @click.native="browseOnline"></Icon>
+      <Icon v-if="skn" type="ios-cloud-outline" title="调用图片服务" @click.native="browseOnline"></Icon>
     </div>
 
     <modal-skn-image v-model="sknImageModel" :skn="skn" @selected="selected"></modal-skn-image>
@@ -33,13 +36,13 @@
 import _ from 'lodash';
 
 export default {
-    name: 'drag-file-upload',
+  name: 'DragFileUpload',
   props: {
     id: {
-            type: Object
+      type: Object,
     },
     defaultFile: {
-            type: String
+      type: String,
     },
     skn: {
       type: [String, Number],
@@ -48,11 +51,27 @@ export default {
       type: String,
       default() {
         return 'goodsimg';
-            }
-        }
+      },
+    },
+    format: {
+      type: Array,
+      default() {
+        return ['jpg', 'jpeg', 'png'];
+      },
+    },
+    formatErrMsg: {
+      type: Function,
+      default() {
+        return file => `文件 ${file.name} 格式不正确，请上传 jpg 或 png 格式的图片。`;
+      },
+    },
+    uploadIconTitle: {
+      type: String,
+      default: '上传图片',
+    },
   },
   data() {
-        let _this = this;
+    const _this = this;
 
     return {
       imgUrl: '',
@@ -60,17 +79,27 @@ export default {
       show: true,
       sknImageModel: false,
       uploadList: [],
-            defaultList: _this.defaultFile ? [{url: _this.defaultFile}] : []
+      defaultList: _this.defaultFile ? [{ url: _this.defaultFile }] : [],
     };
   },
+  watch: {
+    defaultFile(newValue) {
+      if (newValue) {
+        this.defaultList = [{ url: newValue }];
+      }
+    },
+  },
+  mounted() {
+    this.uploadList = this.$refs.upload.fileList;
+  },
   methods: {
     handleView(url) {
       this.imgUrl = url;
       this.visible = true;
     },
     handleRemove() {
-            let file = this.uploadList[0];
-            let files = this.$refs.upload.fileList;
+      const file = this.uploadList[0];
+      const files = this.$refs.upload.fileList;
 
       this.$refs.upload.fileList.splice(files.indexOf(file), 1);
       this.uploadList = this.$refs.upload.fileList;
@@ -91,38 +120,26 @@ export default {
     handleFormatError(file) {
       this.$Notice.warning({
         title: '文件格式不正确',
-                desc: '文件 ' + file.name + ' 格式不正确，请上传 jpg 或 png 格式的图片。'
+        desc: this.formatErrMsg(file),
       });
     },
     handleMaxSize(file) {
       this.$Notice.warning({
         title: '超出文件大小限制',
-                desc: '文件 ' + file.name + ' 太大，不能超过 2M。'
+        desc: '文件 ' + file.name + ' 太大，不能超过 2M。',
       });
     },
     browseOnline() {
       this.sknImageModel = true;
     },
     selected(url) {
-            this.uploadList = this.defaultList = [{url}];
-            this.$emit('success', this.id, {url});
+      this.uploadList = this.defaultList = [{ url }];
+      this.$emit('success', this.id, { url });
     },
-
   },
-    mounted() {
-        this.uploadList = this.$refs.upload.fileList;
-    },
-    watch: {
-        defaultFile: function(newValue) {
-            if (newValue) {
-                this.defaultList = [{url: newValue}];
-            }
-        }
-    }
 };
 </script>
 <style lang="scss">
-
 .upload-box {
   width: 100px;
   height: 100px;