perf(Uploader): update style & adjust event order (#2886)

fix #2879

example/pages/uploader/index.js

@@ -2,7 +2,7 @@ import Page from '../../common/page';
 
 Page({
   data: {
-    fileList: [],
+    fileList1: [],
     fileList2: [
       { url: 'https://img.yzcdn.cn/vant/leaf.jpg' },
       { url: 'https://img.yzcdn.cn/vant/tree.jpg' }

packages/common/style/var.less

@@ -522,22 +522,29 @@
 // Uploader
 @uploader-size: 80px;
 @uploader-icon-size: 24px;
-@uploader-icon-color: @gray-6;
+@uploader-icon-color: @gray-4;
 @uploader-text-color: @gray-6;
 @uploader-text-font-size: @font-size-sm;
-@uploader-upload-border-color: @gray-3;
-@uploader-upload-border-radius: 4px;
-@uploader-upload-background-color: @white;
+@uploader-upload-border-radius: 8px;
+@uploader-upload-background-color: @gray-1;
+@uploader-upload-active-color: @active-color;
 @uploader-delete-color: @gray-6;
 @uploader-delete-icon-size: 18px;
 @uploader-delete-background-color: @white;
 @uploader-file-background-color: @background-color;
 @uploader-file-icon-size: 20px;
 @uploader-file-icon-color: @gray-7;
+@uploader-file-name-padding: 0 @padding-base;
+@uploader-file-name-margin-top: @padding-xs;
 @uploader-file-name-font-size: @font-size-sm;
 @uploader-file-name-text-color: @gray-7;
+@uploader-mask-background-color: fade(@gray-8, 88%);
+@uploader-mask-icon-size: 22px;
+@uploader-mask-message-font-size: @font-size-sm;
+@uploader-mask-message-line-height: 14px;
+@uploader-loading-icon-size: 22px;
+@uploader-loading-icon-color: @white;
 @uploader-disabled-opacity: @disabled-opacity;
-
 // DropdownMenu
 @dropdown-menu-height: 50px;
 @dropdown-menu-background-color: @white;

packages/uploader/index.less

@@ -29,13 +29,13 @@
     height: @uploader-size;
     margin: 0 @padding-xs @padding-xs 0;
     background-color: @uploader-upload-background-color;
-    border: 1px dashed @uploader-upload-border-color;
     border-radius: @uploader-upload-border-radius;
 
+    &:active {
+      background-color: @uploader-upload-active-color;
+    }
+
     &-icon {
-      display: inline-block;
-      width: 24px;
-      height: 24px;
       color: @uploader-icon-color;
       font-size: @uploader-icon-size;
     }
@@ -54,11 +54,13 @@
   &__preview {
     position: relative;
     margin: 0 @padding-xs @padding-xs 0;
+    cursor: pointer;
 
     &-image {
       display: block;
       width: @uploader-size;
       height: @uploader-size;
+      overflow: hidden;
       border-radius: @uploader-upload-border-radius;
     }
 
@@ -84,9 +86,6 @@
     border-radius: @uploader-upload-border-radius;
 
     &-icon {
-      display: inline-block;
-      width: 20px;
-      height: 20px;
       color: @uploader-file-icon-color;
       font-size: @uploader-file-icon-size;
     }
@@ -94,8 +93,8 @@
     &-name {
       box-sizing: border-box;
       width: 100%;
-      margin-top: @padding-xs;
-      padding: 0 5px;
+      margin-top: @uploader-file-name-margin-top;
+      padding: @uploader-file-name-padding;
       color: @uploader-file-name-text-color;
       font-size: @uploader-file-name-font-size;
       text-align: center;

packages/uploader/index.ts

@@ -1,5 +1,6 @@
 import { VantComponent } from '../common/component';
-import { isImageFile, isVideo } from './utils';
+import { isImageFile, isVideo, chooseFile, isPromise } from './utils';
+import { chooseImageProps, chooseVideoProps } from './shared';
 
 VantComponent({
   props: {
@@ -7,6 +8,8 @@ VantComponent({
     multiple: Boolean,
     uploadText: String,
     useBeforeRead: Boolean,
+    afterRead: null,
+    beforeRead: null,
     previewSize: {
       type: null,
       value: 90
@@ -19,14 +22,6 @@ VantComponent({
       type: String,
       value: 'image'
     },
-    sizeType: {
-      type: Array,
-      value: ['original', 'compressed']
-    },
-    capture: {
-      type: Array,
-      value: ['album', 'camera']
-    },
     fileList: {
       type: Array,
       value: [],
@@ -60,27 +55,16 @@ VantComponent({
       type: String,
       value: 'scaleToFill'
     },
-    camera: {
-      type: String,
-      value: 'back'
-    },
-    compressed: {
-      type: Boolean,
-      value: true
-    },
-    maxDuration: {
-      type: Number,
-      value: 60
-    },
     uploadIcon: {
       type: String,
-      value: 'plus'
-    }
+      value: 'photograph'
+    },
+    ...chooseImageProps,
+    ...chooseVideoProps
   },
 
   data: {
     lists: [],
-    computedPreviewSize: '',
     isInCount: true
   },
 
@@ -95,128 +79,116 @@ VantComponent({
       this.setData({ lists, isInCount: lists.length < maxCount });
     },
 
+    getDetail(index) {
+      return {
+        name: this.data.name,
+        index: index == null ? this.data.fileList.length : index
+      };
+    },
+
     startUpload() {
-      if (this.data.disabled) return;
-      const {
-        name = '',
-        capture,
-        maxCount,
-        multiple,
-        maxSize,
-        accept,
-        sizeType,
-        lists,
-        camera,
-        compressed,
-        maxDuration,
-        useBeforeRead = false // 是否定义了 beforeRead
-      } = this.data;
+      const { maxCount, multiple, accept, lists, disabled } = this.data;
 
-      let chooseFile = null;
-      const newMaxCount = maxCount - lists.length;
-      // 设置为只选择图片的时候使用 chooseImage 来实现
-      if (accept === 'image') {
-        chooseFile = new Promise((resolve, reject) => {
-          wx.chooseImage({
-            count: multiple ? (newMaxCount > 9 ? 9 : newMaxCount) : 1, // 最多可以选择的数量，如果不支持多选则数量为1
-            sourceType: capture, // 选择图片的来源，相册还是相机
-            sizeType,
-            success: resolve,
-            fail: reject
-          });
-        });
-      } else if (accept === 'video') {
-        chooseFile = new Promise((resolve, reject) => {
-          wx.chooseVideo({
-            sourceType: capture,
-            compressed,
-            maxDuration,
-            camera,
-            success: resolve,
-            fail: reject
-          });
-        });
-      } else {
-        chooseFile = new Promise((resolve, reject) => {
-          wx.chooseMessageFile({
-            count: multiple ? newMaxCount : 1, // 最多可以选择的数量，如果不支持多选则数量为1
-            type: 'file',
-            success: resolve,
-            fail: reject
-          });
-        });
-      }
+      if (disabled) return;
 
-      chooseFile
-        .then(
-          (
-            res:
-              | WechatMiniprogram.ChooseImageSuccessCallbackResult
-              | WechatMiniprogram.ChooseMessageFileSuccessCallbackResult
-              | WechatMiniprogram.ChooseVideoSuccessCallbackResult
-          ) => {
-            let file = null;
+      chooseFile({
+        ...this.data,
+        maxCount: maxCount - lists.length
+      })
+        .then(res => {
+          let file = null;
 
-            if (isVideo(res, accept)) {
-              file = {
-                path: res.tempFilePath,
-                ...res
-              };
-            } else {
-              file = multiple ? res.tempFiles : res.tempFiles[0];
-            }
-
-            // 检查文件大小
-            if (file instanceof Array) {
-              const sizeEnable = file.every(item => item.size <= maxSize);
-              if (!sizeEnable) {
-                this.$emit('oversize', { name });
-                return;
-              }
-            } else if (file.size > maxSize) {
-              this.$emit('oversize', { name });
-              return;
-            }
-
-            // 触发上传之前的钩子函数
-            if (useBeforeRead) {
-              this.$emit('before-read', {
-                file,
-                name,
-                callback: (result: boolean) => {
-                  if (result) {
-                    // 开始上传
-                    this.$emit('after-read', { file, name });
-                  }
-                }
-              });
-            } else {
-              this.$emit('after-read', { file, name });
-            }
+          if (isVideo(res, accept)) {
+            file = {
+              path: res.tempFilePath,
+              ...res
+            };
+          } else {
+            file = multiple ? res.tempFiles : res.tempFiles[0];
           }
-        )
+
+          this.onBeforeRead(file);
+        })
         .catch(error => {
           this.$emit('error', error);
         });
     },
 
-    deleteItem(event) {
-      const { index } = event.currentTarget.dataset;
-      this.$emit('delete', { index, name: this.data.name });
+    onBeforeRead(file) {
+      const { beforeRead, useBeforeRead } = this.data;
+      let res: boolean | Promise<any> = true;
+
+      if (typeof beforeRead === 'function') {
+        res = beforeRead(file, this.getDetail());
+      }
+
+      if (useBeforeRead) {
+        res = new Promise((resolve, reject) => {
+          this.$emit('before-read', {
+            file,
+            ...this.getDetail(),
+            callback: (ok: boolean) => {
+              ok ? resolve() : reject();
+            }
+          });
+        });
+      }
+
+      if (!res) {
+        return;
+      }
+
+      if (isPromise(res)) {
+        res.then((data: any) => this.onAfterRead(data || file));
+      } else {
+        this.onAfterRead(file);
+      }
     },
 
-    doPreviewImage(event) {
-      if (!this.data.previewFullImage) return;
-      const curUrl = event.currentTarget.dataset.url;
-      const images = this.data.lists
-        .filter(item => item.isImage)
-        .map(item => item.url || item.path);
+    onAfterRead(file) {
+      const { maxSize } = this.data;
+      const oversize = Array.isArray(file)
+        ? file.some(item => item.size > maxSize)
+        : file.size > maxSize;
 
-      this.$emit('click-preview', { url: curUrl, name: this.data.name });
+      if (oversize) {
+        this.$emit('oversize', { file, ...this.getDetail() });
+        return;
+      }
+
+      if (typeof this.data.afterRead === 'function') {
+        this.data.afterRead(file, this.getDetail());
+      }
+
+      this.$emit('after-read', { file, ...this.getDetail() });
+    },
+
+    deleteItem(event) {
+      const { index } = event.currentTarget.dataset;
+
+      this.$emit('delete', {
+        ...this.getDetail(index),
+        file: this.data.fileList[index]
+      });
+    },
+
+    onPreviewImage(event) {
+      const { index } = event.currentTarget.dataset;
+      const { lists } = this.data;
+      const item = lists[index];
+
+      this.$emit('click-preview', {
+        url: item.url || item.path,
+        ...this.getDetail(index)
+      });
+
+      if (!this.data.previewFullImage) return;
 
       wx.previewImage({
-        urls: images,
-        current: curUrl,
+        urls: lists
+          .filter(item => item.isImage)
+          .map(item => item.url || item.path),
+        current: item.url || item.path,
         fail() {
           wx.showToast({ title: '预览图片失败', icon: 'none' });
         }

packages/uploader/index.wxml

@@ -16,8 +16,8 @@
         alt="{{ item.name || ('图片' + index) }}"
         class="van-uploader__preview-image"
         style="width: {{ utils.addUnit(previewSize) }}; height: {{ utils.addUnit(previewSize) }};"
-        data-url="{{ item.url || item.path }}"
-        bind:tap="doPreviewImage"
+        data-index="{{ index }}"
+        bind:tap="onPreviewImage"
       />
       <view
         wx:else

packages/uploader/shared.ts

@@ -0,0 +1,31 @@
+// props for choose image
+export const chooseImageProps = {
+  sizeType: {
+    type: Array,
+    value: ['original', 'compressed']
+  },
+  capture: {
+    type: Array,
+    value: ['album', 'camera']
+  }
+};
+
+// props for choose video
+export const chooseVideoProps = {
+  capture: {
+    type: Array,
+    value: ['album', 'camera']
+  },
+  compressed: {
+    type: Boolean,
+    value: true
+  },
+  maxDuration: {
+    type: Number,
+    value: 60
+  },
+  camera: {
+    type: String,
+    value: 'back'
+  }
+};

packages/uploader/utils.ts

@@ -31,8 +31,67 @@ export function isImageFile(item: File): boolean {
 }
 
 export function isVideo(
-  res,
-  accept
+  res: any,
+  accept: string
 ): res is WechatMiniprogram.ChooseVideoSuccessCallbackResult {
   return accept === 'video';
 }
+
+export function chooseFile({
+  accept,
+  multiple,
+  capture,
+  compressed,
+  maxDuration,
+  sizeType,
+  camera,
+  maxCount
+}): Promise<
+  | WechatMiniprogram.ChooseImageSuccessCallbackResult
+  | WechatMiniprogram.ChooseVideoSuccessCallbackResult
+  | WechatMiniprogram.ChooseMessageFileSuccessCallbackResult
+> {
+  if (accept === 'image') {
+    return new Promise((resolve, reject) => {
+      wx.chooseImage({
+        count: multiple ? Math.min(maxCount, 9) : 1, // 最多可以选择的数量，如果不支持多选则数量为1
+        sourceType: capture, // 选择图片的来源，相册还是相机
+        sizeType,
+        success: resolve,
+        fail: reject
+      });
+    });
+  }
+  if (accept === 'video') {
+    return new Promise((resolve, reject) => {
+      wx.chooseVideo({
+        sourceType: capture,
+        compressed,
+        maxDuration,
+        camera,
+        success: resolve,
+        fail: reject
+      });
+    });
+  }
+  return new Promise((resolve, reject) => {
+    wx.chooseMessageFile({
+      count: multiple ? maxCount : 1, // 最多可以选择的数量，如果不支持多选则数量为1
+      type: 'file',
+      success: resolve,
+      fail: reject
+    });
+  });
+}
+
+export function isFunction(val: unknown): val is Function {
+  return typeof val === 'function';
+}
+
+export function isObject(val: any): val is Record<any, any> {
+  return val !== null && typeof val === 'object';
+}
+
+export function isPromise<T = any>(val: unknown): val is Promise<T> {
+  return isObject(val) && isFunction(val.then) && isFunction(val.catch);
+}