node文件资源管理器的图片预览从零实现
作者:寒露
使用技术
- 使用 Next.js 的 Image 组件显示图片。自带图片压缩生成快速预览的 webp 格式图片
- 使用 antd 的 PreviewGroup 组件实现原图浏览,自带缩小、放大、上一张、下一张等功能
功能实现
文件树
explorer/src/app/path/[[...path]]/card-display.tsx
explorer/src/app/path/[[...path]]/page.tsx
explorer/src/components/preview/ext-rxp.tsx
explorer/src/components/preview/index.tsx
explorer/src/components/preview/proview-group-context.tsx
explorer/src/components/use-replace-pathname.ts
文件路径:explorer/src/components/preview/ext-rxp.tsx
一些判断文件后缀名方法
export const ImgRxp = /\.(jpg|jpeg|gif|png|webp|ico)$/i const RawRxp = /\.(cr2|arw)/i const GifRxp = /\.(gif)$/i const ZipRxp = /\.(zip|rar|7z|tar\.xz|tar)(\.+\d+)?$/i const VideoRxp = /\.(mp4|mkv|mov|wmv|avi|avchd|flv|f4v|swf)(\.+\d+)?$/i export const isRaw = (path: string) => RawRxp.test(path) export const isImage = (path: string) => ImgRxp.test(path) export const isGif = (path: string) => GifRxp.test(path) export const isZip = (path: string) => ZipRxp.test(path) export const isVideo = (path: string) => VideoRxp.test(path)
文件路径:explorer/src/components/preview/index.tsx
预览封装组件,根据是否为文件夹、视频、图片、压缩包显示不同的 icon。
点击图片时,使用 antd 的 PreviewGroup 组件查看原图。
import React from 'react' import { FileOutlined, FileZipOutlined, FolderOutlined, VideoCameraOutlined } from '@ant-design/icons' import Image from 'next/image' import { isGif, isImage, isVideo, isZip } from '@/components/preview/ext-rxp' import { usePreviewGroupDispatch } from '@/components/preview/proview-group-context' import { ReaddirItemType } from '@/explorer-manager/src/type' import { useReplacePathname } from '@/components/use-replace-pathname' const Preview: React.FC<{ item: ReaddirItemType }> = ({ item }) => { const previewGroupDispatch = usePreviewGroupDispatch() const { name, is_directory } = item const { staticPath, joinSearchPath } = useReplacePathname() if (is_directory) { return <FolderOutlined /> } if (isVideo(name)) { return <VideoCameraOutlined /> } if (isImage(name)) { const image_path = staticPath(name) return ( <Image onClick={() => previewGroupDispatch(name)} src={image_path} alt={name} fill sizes="375px" style={{ objectFit: 'scale-down', //"contain" | "cover" | "fill" | "none" | "scale-down" }} unoptimized={isGif(image_path)} placeholder="empty" /> ) } if (isZip(name)) { return <FileZipOutlined /> } return <FileOutlined /> } export default Preview
文件路径:explorer/src/components/preview/proview-group-context.tsx
antd PreviewGroup 组件封装。
需要在顶层目录插入 PreviewGroupProvider 上下文组件,导出 usePreviewGroup、usePreviewGroupDispatch 读写方法。
'use client' import React from 'react' import { Image as AntdImage } from 'antd' import { findIndex } from 'lodash' import { isImage } from '@/components/preview/ext-rxp' import { useReplacePathname } from '@/components/use-replace-pathname' import createCtx from '@/lib/create-ctx' import { useReaddirContext } from '@/app/path/readdir-context' export const PreviewGroupContent = createCtx<string>() export const usePreviewGroup = PreviewGroupContent.useStore export const usePreviewGroupDispatch = PreviewGroupContent.useDispatch const AntdImagePreviewGroup: React.FC<React.PropsWithChildren> = ({ children }) => { const { staticPath } = useReplacePathname() const readdir_list = useReaddirContext() const image_list = readdir_list.filter((item) => isImage(item.name)) const name = usePreviewGroup() const previewGroupDispatch = usePreviewGroupDispatch() return ( <AntdImage.PreviewGroup preview={{ visible: !!name, current: findIndex(image_list, { name }), onVisibleChange: () => { previewGroupDispatch('') }, onChange: (current) => { previewGroupDispatch(image_list[current].name) }, }} items={image_list.map(({ name }) => staticPath(name))} > {children} </AntdImage.PreviewGroup> ) } const PreviewGroupProvider: React.FC<{ children: React.ReactNode }> = ({ children }) => { return ( <PreviewGroupContent.ContextProvider value={''}> <AntdImagePreviewGroup>{children}</AntdImagePreviewGroup> </PreviewGroupContent.ContextProvider> ) } export default PreviewGroupProvider
文件路径:explorer/src/components/use-replace-pathname.ts
添加一个获取不同路径的hooks
- replace\_pathname 将不需要的一级路径 /path/ 过滤掉
- joinSearchPath 拼接过滤掉 /path/ 的 pathname
- joinPath 拼接未过滤的 pathname
- staticPath 拼接得到获取文件地址
import { usePathname } from 'next/navigation' export const pathExp = /(^\/)?path/ export const encodePathItem = (path: string) => { return path .split('/') .map((text) => encodeURIComponent(text)) .join('/') } export const useReplacePathname = () => { const pathname = decodeURIComponent(usePathname() || '') const replace_pathname = pathname.replace(pathExp, '') const joinSearchPath = (path: string) => encodePathItem(`${replace_pathname}/${path}`) const joinPath = (path: string) => encodePathItem(`${pathname}/${path}`) const staticPath = (path: string) => `/static${joinSearchPath(path)}` return { pathname: pathname, replace_pathname: replace_pathname, joinSearchPath: joinSearchPath, joinPath: joinPath, staticPath: staticPath, } }
文件路径:explorer/src/app/path/[[...path]]/card-display.tsx
将 Preview 组件插入 List Item 内
... import Preview from '@/components/preview' const CardDisplay: React.FC = () => { const pathname = usePathname() const readdir = useReaddirContext() const column = useCardColumnContext() return ( <List ... <div style={{ position: 'absolute', width: '100%', height: '100%' }}> <Preview item={item} /> </div> ...
文件路径:explorer/src/app/path/[[...path]]/page.tsx
将 PreviewGroupProvider 组件插入最顶部
... import PreviewGroupProvider from '@/components/preview/proview-group-context' const Page: React.FC = () => { const display_type = useDisplayTypeContext() return <PreviewGroupProvider>{display_type === 'table' ? <TableDisplay /> : <CardDisplay />}</PreviewGroupProvider> } export default Page
效果
git-repo
以上就是node文件资源管理器的图片预览从零实现的详细内容,更多关于node文件图片预览的资料请关注脚本之家其它相关文章!