feat(image-viewer): add image-viewer

site/mobile/mobile.config.js

@@ -40,6 +40,11 @@ export default {
       name: 'image',
       component: () => import('tdesign-mobile-react/image/_example/index.tsx'),
     },
+    {
+      title: 'ImageViewer 图片预览',
+      name: 'image-viewer',
+      component: () => import('tdesign-mobile-react/image-viewer/_example/index.tsx'),
+    },
     {
       title: 'Overlay 遮罩层',
       name: 'overlay',

site/web/site.config.js

@@ -382,12 +382,14 @@ export const docs = [
         component: () => import('tdesign-mobile-react/image/image.md'),
         componentEn: () => import('tdesign-mobile-react/image/image.en-US.md'),
       },
-      // {
-      //   title: 'ImageViewer 图片预览',
-      //   name: 'image-viewer',
-      //   path: '/mobile-react/components/image-viewer',
-      //   component: () => import('tdesign-mobile-react/image-viewer/image-viewer.md'),
-      // },
+      {
+        title: 'ImageViewer 图片预览',
+        titleEn: 'ImageViewer',
+        name: 'ImageViewer',
+        path: '/mobile-react/components/image-viewer',
+        component: () => import('tdesign-mobile-react/image-viewer/image-viewer.md'),
+        componentEn: () => import('tdesign-mobile-react/image-viewer/image-viewer.en-US.md'),
+      },
       // {
       //   title: 'List 列表',
       //   name: 'list',

src/image-viewer/_example/align.tsx

@@ -0,0 +1,31 @@
+import React, { useState } from 'react';
+import { ImageViewer, Button, type ImageInfo } from 'tdesign-mobile-react';
+
+const images: ImageInfo[] = [
+  {
+    url: 'https://tdesign.gtimg.com/mobile/demos/swiper1.png',
+    align: 'start',
+  },
+  {
+    url: 'https://tdesign.gtimg.com/mobile/demos/swiper2.png',
+    align: 'end',
+  },
+  {
+    url: 'https://tdesign.gtimg.com/mobile/demos/swiper2.png',
+    align: 'center',
+  },
+];
+
+export default function AlignDemo() {
+  const [visible, setVisible] = useState(false);
+
+  return (
+    <div className="image-example">
+      <Button block size="large" variant="outline" theme="primary" onClick={() => setVisible(true)}>
+        基础图片预览 + 对齐方式
+      </Button>
+
+      <ImageViewer images={images} visible={visible} onClose={() => setVisible(false)} />
+    </div>
+  );
+}

src/image-viewer/_example/base.tsx

@@ -0,0 +1,21 @@
+import React, { useState } from 'react';
+import { ImageViewer, Button } from 'tdesign-mobile-react';
+
+const images = [
+  'https://tdesign.gtimg.com/mobile/demos/swiper1.png',
+  'https://tdesign.gtimg.com/mobile/demos/swiper2.png',
+];
+
+export default function BaseDemo() {
+  const [visible, setVisible] = useState(false);
+
+  return (
+    <div className="image-example">
+      <Button block size="large" variant="outline" theme="primary" onClick={() => setVisible(true)}>
+        基础图片预览
+      </Button>
+
+      <ImageViewer images={images} visible={visible} onClose={() => setVisible(false)} />
+    </div>
+  );
+}

src/image-viewer/_example/index.tsx

@@ -0,0 +1,27 @@
+import React from 'react';
+import TDemoBlock from '../../../site/mobile/components/DemoBlock';
+import TDemoHeader from '../../../site/mobile/components/DemoHeader';
+import BaseDemo from './base';
+import AlignDemo from './align';
+import OperationDemo from './operation';
+import './style/index.less';
+
+export default function ImageViewerDemo() {
+  return (
+    <div className="tdesign-mobile-demo">
+      <TDemoHeader
+        title="ImageViewer 图片预览"
+        summary="图片全屏放大预览效果，包含全屏背景色、页码位置样式、增加操作等规范"
+      />
+      <TDemoBlock title="01 组件类型" summary="图片预览类型" padding={true}>
+        <BaseDemo />
+      </TDemoBlock>
+      <TDemoBlock title="02 组件类型" summary="图片预览类型，可设置垂直对齐方式" padding={true}>
+        <AlignDemo />
+      </TDemoBlock>
+      <TDemoBlock title="03 组件类型" summary="带操作图片预览" padding={true}>
+        <OperationDemo />
+      </TDemoBlock>
+    </div>
+  );
+}

src/image-viewer/_example/operation.tsx

@@ -0,0 +1,27 @@
+import React, { useState } from 'react';
+import { ImageViewer, Button } from 'tdesign-mobile-react';
+
+const images = [
+  'https://tdesign.gtimg.com/mobile/demos/swiper1.png',
+  'https://tdesign.gtimg.com/mobile/demos/swiper2.png',
+];
+
+export default function OperationDemo() {
+  const [visible, setVisible] = useState(false);
+
+  return (
+    <div className="image-example">
+      <Button block size="large" variant="outline" theme="primary" onClick={() => setVisible(true)}>
+        带操作图片预览
+      </Button>
+
+      <ImageViewer
+        images={images}
+        visible={visible}
+        showIndex={true}
+        deleteBtn={true}
+        onClose={() => setVisible(false)}
+      />
+    </div>
+  );
+}

src/image-viewer/_example/style/index.less

@@ -0,0 +1,4 @@
+.tdesign-mobile-demo {
+  background-color: #fff;
+  min-height: 100%;
+}

src/image-viewer/defaultProps.ts

@@ -0,0 +1,15 @@
+/**
+ * 该文件为脚本自动生成文件，请勿随意修改。如需修改请联系 PMC
+ * */
+
+import { TdImageViewerProps } from './type';
+
+export const imageViewerDefaultProps: TdImageViewerProps = {
+  closeBtn: true,
+  deleteBtn: false,
+  images: [],
+  defaultIndex: 0,
+  maxZoom: 3,
+  showIndex: false,
+  defaultVisible: false,
+};

src/image-viewer/image-viewer.en-US.md

@@ -0,0 +1,25 @@
+:: BASE_DOC ::
+
+## API
+
+### ImageViewer Props
+
+name | type | default | description | required
+-- | -- | -- | -- | --
+className | String | - | className of component | N
+style | Object | - | CSS(Cascading Style Sheets)，Typescript：`React.CSSProperties` | N
+closeBtn | TNode | true | Typescript：`boolean \| TNode`。[see more ts definition](https://github.com/Tencent/tdesign-mobile-react/blob/develop/src/common.ts) | N
+deleteBtn | TNode | false | Typescript：`boolean \| TNode`。[see more ts definition](https://github.com/Tencent/tdesign-mobile-react/blob/develop/src/common.ts) | N
+images | Array | [] | Typescript：`Array<string \| ImageInfo>` `interface ImageInfo { url: string; align: 'start' \| 'center' \| 'end' }`。[see more ts definition](https://github.com/Tencent/tdesign-mobile-react/tree/develop/src/image-viewer/type.ts) | N
+index | Number | 0 | \- | N
+defaultIndex | Number | 0 | uncontrolled property | N
+index | Number | - | \- | N
+defaultIndex | Number | - | uncontrolled property | N
+maxZoom | Number | 3 | Typescript：`number` | N
+showIndex | Boolean | false | \- | N
+visible | Boolean | false | hide or show image viewer | N
+defaultVisible | Boolean | false | hide or show image viewer。uncontrolled property | N
+onClose | Function |  | Typescript：`(context: { trigger: 'overlay' \| 'close-btn', visible: boolean, index: number }) => void`<br/> | N
+onDelete | Function |  | Typescript：`(index: number) => void`<br/> | N
+onIndexChange | Function |  | Typescript：`(index: number, context: { trigger: 'prev' \| 'next' \| 'current' }) => void`<br/> | N
+onIndexChange | Function |  | Typescript：`(index: number, context: { trigger: 'prev' \| 'next' }) => void`<br/> | N

src/image-viewer/image-viewer.md

@@ -0,0 +1,25 @@
+:: BASE_DOC ::
+
+## API
+
+### ImageViewer Props
+
+名称 | 类型 | 默认值 | 描述 | 必传
+-- | -- | -- | -- | --
+className | String | - | 类名 | N
+style | Object | - | 样式，TS 类型：`React.CSSProperties` | N
+closeBtn | TNode | true | 是否展示关闭按钮，值为 `true` 显示默认关闭按钮；值为 `false` 则不显示关闭按钮；也可以完全自定义关闭按钮。TS 类型：`boolean \| TNode`。[通用类型定义](https://github.com/Tencent/tdesign-mobile-react/blob/develop/src/common.ts) | N
+deleteBtn | TNode | false | 是否显示删除操作，前提需要开启页码。TS 类型：`boolean \| TNode`。[通用类型定义](https://github.com/Tencent/tdesign-mobile-react/blob/develop/src/common.ts) | N
+images | Array | [] | 图片数组。TS 类型：`Array<string \| ImageInfo>` `interface ImageInfo { url: string; align: 'start' \| 'center' \| 'end' }`。[详细类型定义](https://github.com/Tencent/tdesign-mobile-react/tree/develop/src/image-viewer/type.ts) | N
+index | Number | 0 | 当前预览图片所在的下标 | N
+defaultIndex | Number | 0 | 当前预览图片所在的下标。非受控属性 | N
+index | Number | - | 当前预览图片所在的下标 | N
+defaultIndex | Number | - | 当前预览图片所在的下标。非受控属性 | N
+maxZoom | Number | 3 | 【开发中】最大放大比例。TS 类型：`number` | N
+showIndex | Boolean | false | 是否显示页码 | N
+visible | Boolean | false | 隐藏/显示预览 | N
+defaultVisible | Boolean | false | 隐藏/显示预览。非受控属性 | N
+onClose | Function |  | TS 类型：`(context: { trigger: 'overlay' \| 'close-btn', visible: boolean, index: number }) => void`<br/>关闭时触发 | N
+onDelete | Function |  | TS 类型：`(index: number) => void`<br/>点击删除操作按钮时触发 | N
+onIndexChange | Function |  | TS 类型：`(index: number, context: { trigger: 'prev' \| 'next' \| 'current' }) => void`<br/>预览图片切换时触发，`context.prev` 切换到上一张图片，`context.next` 切换到下一张图片 | N
+onIndexChange | Function |  | TS 类型：`(index: number, context: { trigger: 'prev' \| 'next' }) => void`<br/>预览图片切换时触发，`context.prev` 切换到上一张图片，`context.next` 切换到下一张图片 | N

src/image-viewer/image-viewer.tsx

@@ -0,0 +1,160 @@
+import React, { MouseEvent, useRef, useState } from 'react';
+import { CloseIcon, DeleteIcon } from 'tdesign-icons-react';
+import { TdImageViewerProps, ImageInfo } from './type';
+import { StyledProps } from '../common';
+import { usePrefixClass } from '../hooks/useClass';
+import useDefault from '../_util/useDefault';
+import noop from '../_util/noop';
+import useDefaultProps from '../hooks/useDefaultProps';
+import { imageViewerDefaultProps } from './defaultProps';
+import { Swiper as TSwiper } from '../swiper';
+import parseTNode from '../_util/parseTNode';
+import TSwiperItem from '../swiper/SwiperItem';
+
+export interface ImageViewerProps extends TdImageViewerProps, StyledProps {}
+
+const ImageViewer: React.FC<ImageViewerProps> = (props) => {
+  const { visible, defaultVisible, onClose, index, defaultIndex, onIndexChange, closeBtn, deleteBtn, onDelete } =
+    useDefaultProps<ImageViewerProps>(props, imageViewerDefaultProps);
+
+  const [show, setShow] = useDefault<boolean, any>(visible, defaultVisible, noop);
+  const [currentIndex, setCurrentIndex] = useDefault(index, defaultIndex, onIndexChange);
+  const [innerState, setInnerState] = useState({
+    dblTapZooming: false, // double tap zooming
+    zooming: false, // pinch zooming
+    scale: 1,
+    touchIndex: 0,
+    dragging: false,
+    draggedX: 0,
+    draggedY: 0,
+    extraDraggedX: 0,
+  });
+
+  const swiperRootRef = useRef<HTMLDivElement>(null);
+  const rootRef = useRef<HTMLDivElement>(null);
+
+  const beforeClose = () => {
+    setInnerState({
+      ...innerState,
+      dblTapZooming: false,
+      zooming: false,
+      scale: 1,
+      dragging: false,
+      draggedX: 0,
+      draggedY: 0,
+      extraDraggedX: 0,
+    });
+  };
+
+  const imageViewerClass = usePrefixClass('image-viewer');
+  const handleClose = (e: MouseEvent, trigger: 'overlay' | 'close-btn') => {
+    beforeClose();
+    setShow(false);
+    onClose?.({ trigger, visible: false, index });
+  };
+  const handleDelete = () => {
+    onDelete?.(currentIndex ?? 0);
+  };
+
+  const getPreloadImageIndex = () => {
+    const lastIndex = props.images.length - 1;
+    if ([undefined, 0].includes(currentIndex)) {
+      return [0, 1, lastIndex];
+    }
+    if (currentIndex === lastIndex) {
+      return [lastIndex, lastIndex - 1, 0];
+    }
+    const prev = currentIndex - 1 >= 0 ? currentIndex - 1 : lastIndex;
+    const next = currentIndex + 1 <= lastIndex ? currentIndex + 1 : 0;
+    return [currentIndex, prev, next];
+  };
+
+  const preloadImageIndex = getPreloadImageIndex();
+
+  const imageInfoList = props.images.map((image, index) => {
+    let imageInfo: ImageInfo;
+    if (typeof image === 'string') {
+      imageInfo = {
+        url: image,
+        align: 'center',
+      };
+    } else {
+      imageInfo = image;
+    }
+    return {
+      image: imageInfo,
+      preload: preloadImageIndex.includes(index),
+    };
+  });
+
+  const onSwiperChange = (index: number) => {
+    if (currentIndex !== index) {
+      const trigger = currentIndex < index ? 'next' : 'prev';
+      setCurrentIndex(index, { trigger });
+    }
+  };
+
+  const getImageTransform = () => {
+    const { scale, draggedX, draggedY } = innerState;
+    return `matrix(${scale}, 0, 0, ${scale}, ${draggedX}, ${draggedY})`;
+  };
+  const getImageTransitionDuration = () => {
+    const { zooming, dragging } = innerState;
+    return zooming || dragging ? { transitionDuration: '0s' } : { transitionDuration: '0.3s' };
+  };
+
+  return (
+    show && (
+      <div ref={rootRef} className={imageViewerClass}>
+        <div className={`${imageViewerClass}__mask`} onClick={(e) => handleClose(e, 'overlay')}></div>
+        <TSwiper
+          ref={swiperRootRef}
+          autoplay={false}
+          height={'100vh'}
+          className={`${imageViewerClass}__content`}
+          onChange={onSwiperChange}
+          current={currentIndex}
+          defaultCurrent={currentIndex}
+        >
+          {imageInfoList.map((info, index) => (
+            <TSwiperItem
+              key={index}
+              className={`${imageViewerClass}__swiper-item`}
+              style={{ touchAction: 'none', alignItems: info.image.align, display: 'flex' }}
+            >
+              <img
+                src={info.image.url}
+                style={{
+                  transform: index === innerState.touchIndex ? getImageTransform() : 'matrix(1, 0, 0, 1, 0, 0)',
+                  ...getImageTransitionDuration(),
+                  height: '100%',
+                }}
+                className={`${imageViewerClass}__img`}
+              />
+            </TSwiperItem>
+          ))}
+        </TSwiper>
+
+        <div className={`${imageViewerClass}__nav`}>
+          <div className={`${imageViewerClass}__nav-close`} onClick={(e) => handleClose(e, 'close-btn')}>
+            {parseTNode(closeBtn, null, <CloseIcon />)}
+          </div>
+
+          {props.showIndex && (
+            <div className={`${imageViewerClass}__nav-index`}>
+              {`${Math.min((currentIndex ?? 0) + 1, props.images?.length)}/${props.images?.length}`}
+            </div>
+          )}
+
+          <div className={`${imageViewerClass}__nav-delete`} onClick={handleDelete}>
+            {parseTNode(deleteBtn, null, <DeleteIcon />)}
+          </div>
+        </div>
+      </div>
+    )
+  );
+};
+
+ImageViewer.displayName = 'ImageViewer';
+
+export default ImageViewer;

src/image-viewer/index.ts

@@ -0,0 +1,9 @@
+import _ImageViewer from './image-viewer';
+
+import './style/index.js';
+
+export type { ImageViewerProps } from './image-viewer';
+export * from './type';
+
+export const ImageViewer = _ImageViewer;
+export default ImageViewer;

src/image-viewer/style/css.js

@@ -0,0 +1 @@
+import './index.css';

src/image-viewer/style/index.js

@@ -0,0 +1 @@
+import '../../_common/style/mobile/components/image-viewer/v2/_index.less';