726 lines
19 KiB
Vue
726 lines
19 KiB
Vue
<template>
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<div>
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<el-dialog
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v-model="dialogFormVisible"
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:title="title"
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width="80%"
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:before-close="handleClose"
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class="file-preview-dialog"
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>
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<div class="preview-container">
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<!-- 加载状态 -->
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<div v-if="loading" class="loading-container">
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<el-icon class="is-loading" size="48">
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<Loading />
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</el-icon>
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<p>{{ loadingText }}</p>
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</div>
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<!-- 下载状态 -->
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<div v-else-if="downloading" class="loading-container">
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<el-icon class="is-loading" size="48">
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<Loading />
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</el-icon>
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<p>正在下载文件，请稍候...</p>
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<p class="download-progress" v-if="downloadProgress > 0">
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下载进度: {{ downloadProgress }}%
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</p>
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</div>
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<!-- 错误状态 -->
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<div v-else-if="error" class="error-container">
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<el-icon size="48" color="#F56C6C">
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<CircleClose />
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</el-icon>
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<p>文件预览失败</p>
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<p class="error-message">{{ errorMessage }}</p>
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<el-button type="primary" @click="retryPreview">重试</el-button>
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</div>
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<!-- 文件预览内容 -->
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<div v-else class="file-content">
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<!-- 图片预览 -->
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<div v-if="isImage" class="image-preview">
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<img :src="previewUrl" :alt="fileName" @load="handleImageLoad" />
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</div>
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<!-- PDF预览 - 使用 vue-pdf-embed -->
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<div v-else-if="isPdf" class="pdf-preview">
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<div class="pdf-controls" v-if="pageCount > 0">
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<el-button-group>
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<el-button :disabled="currentPage <= 1" @click="previousPage">
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<el-icon><ArrowLeft /></el-icon>
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上一页
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</el-button>
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<el-button>
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{{ currentPage }} / {{ pageCount }}
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</el-button>
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<el-button :disabled="currentPage >= pageCount" @click="nextPage">
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下一页
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<el-icon><ArrowRight /></el-icon>
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</el-button>
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</el-button-group>
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</div>
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<div class="pdf-viewer-container">
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<VuePdfEmbed
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:source="pdfSource"
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:page="currentPage"
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:scale="scale"
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@loaded="handlePdfLoaded"
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@rendered="handlePdfRendered"
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@error="handlePdfError"
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class="pdf-viewer"
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/>
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</div>
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</div>
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<!-- 视频预览 -->
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<div v-else-if="isVideo" class="video-preview">
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<video controls :src="previewUrl" class="video-player">
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您的浏览器不支持视频播放
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</video>
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</div>
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<!-- 音频预览 -->
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<div v-else-if="isAudio" class="audio-preview">
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<audio controls :src="previewUrl" class="audio-player">
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您的浏览器不支持音频播放
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</audio>
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</div>
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<!-- 文本预览 -->
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<div v-else-if="isText" class="text-preview">
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<pre>{{ textContent }}</pre>
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</div>
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<!-- Office文档预览（转换后） -->
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<div v-else-if="isConvertedOffice" class="office-preview">
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<!-- 转换后的Office文件也是PDF，使用相同的PDF预览器 -->
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<div class="pdf-controls" v-if="pageCount > 0">
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<el-button-group>
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<el-button :disabled="currentPage <= 1" @click="previousPage">
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<el-icon><ArrowLeft /></el-icon>
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上一页
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</el-button>
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<el-button>
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{{ currentPage }} / {{ pageCount }}
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</el-button>
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<el-button :disabled="currentPage >= pageCount" @click="nextPage">
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下一页
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<el-icon><ArrowRight /></el-icon>
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</el-button>
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</el-button-group>
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</div>
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<div class="pdf-viewer-container">
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<VuePdfEmbed
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:source="pdfSource"
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:page="currentPage"
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:scale="scale"
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@loaded="handlePdfLoaded"
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@rendered="handlePdfRendered"
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@error="handlePdfError"
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class="pdf-viewer"
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/>
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</div>
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</div>
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<!-- 不支持预览的文件类型 -->
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<div v-else class="unsupported-preview">
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<el-icon size="64" color="#909399">
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<Document />
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</el-icon>
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<p>不支持在线预览此文件类型</p>
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<p class="file-name">{{ fileName }}</p>
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<!-- <el-button type="primary" @click="downloadFile">下载文件</el-button> -->
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</div>
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</div>
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</div>
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<!-- 底部操作栏 -->
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<template #footer>
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<div class="dialog-footer">
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<!-- <el-button @click="downloadFile" :disabled="loading">
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<el-icon><Download /></el-icon>
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下载
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</el-button> -->
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<el-button type="primary" @click="close">
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关闭
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</el-button>
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</div>
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</template>
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</el-dialog>
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</div>
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</template>
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<script setup>
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import { ref, computed, getCurrentInstance, onUnmounted, nextTick } from 'vue'
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import { convertFileApi, getConvertStatusApi } from '@/api/conferencingRoom'
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import { ElMessage, ElMessageBox } from 'element-plus'
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import {
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Loading,
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CircleClose,
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Document,
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Download,
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ArrowLeft,
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ArrowRight,
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Plus,
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Minus,
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Refresh
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} from '@element-plus/icons-vue'
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import VuePdfEmbed from 'vue-pdf-embed'
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// 定义props
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const props = defineProps({
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fileType: {
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type: Array,
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default: () => ["pdf", "png", "jpg", "jpeg", "gif", "doc", "docx", "xls", "xlsx", "ppt", "pptx", "txt", "mp4", "mp3"],
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},
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roomId: {
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type: String,
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default: '',
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},
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})
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// 定义emits
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const emit = defineEmits(['fetch-data'])
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const { proxy } = getCurrentInstance()
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const enumType = ["doc", "docx", "xls", "xlsx", "ppt", "pptx"]
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// 响应式数据
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const dialogFormVisible = ref(false)
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const title = ref('')
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const loading = ref(false)
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const downloading = ref(false) // 新增：下载状态
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const downloadProgress = ref(0) // 新增：下载进度
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const loadingText = ref('正在加载...')
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const error = ref(false)
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const errorMessage = ref('')
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const previewUrl = ref('')
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const fileName = ref('')
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const textContent = ref('')
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const currentFileData = ref(null)
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const convertTaskId = ref('')
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const statusCheckInterval = ref(null)
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// PDF相关状态
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const pdfSource = ref('')
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const currentPage = ref(1)
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const pageCount = ref(0)
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const scale = ref(1.0)
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const pdfDocument = ref(null)
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// 计算属性
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const isImage = computed(() => {
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const ext = fileName.value.split('.').pop().toLowerCase()
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return ['png', 'jpg', 'jpeg', 'gif'].includes(ext)
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})
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const isPdf = computed(() => {
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const ext = fileName.value.split('.').pop().toLowerCase()
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return ext === 'pdf'
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})
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const isVideo = computed(() => {
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const ext = fileName.value.split('.').pop().toLowerCase()
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return ['mp4'].includes(ext)
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})
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const isAudio = computed(() => {
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const ext = fileName.value.split('.').pop().toLowerCase()
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return ['mp3'].includes(ext)
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})
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const isText = computed(() => {
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const ext = fileName.value.split('.').pop().toLowerCase()
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return ext === 'txt'
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})
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const isOffice = computed(() => {
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const ext = fileName.value.split('.').pop().toLowerCase()
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return enumType.includes(ext)
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})
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const isConvertedOffice = computed(() => {
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return previewUrl.value && previewUrl.value.endsWith('.pdf') && isOffice.value
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})
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// 显示弹框
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const showEdit = async (data) => {
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// 重置状态
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loading.value = true
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downloading.value = false
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downloadProgress.value = 0
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title.value = '文件预览'
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dialogFormVisible.value = true
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currentFileData.value = data
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fileName.value = data.fileName || data.fileUrl.split('/').pop()
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error.value = false
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previewUrl.value = ''
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textContent.value = ''
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resetPdfState()
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const fileExt = fileName.value.split('.').pop().toLowerCase()
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try {
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if (enumType.includes(fileExt)) {
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// Office文档需要转换
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await getFilePdf(data.fileUrl)
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} else if (fileExt === 'txt') {
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// 文本文件需要特殊处理
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await loadTextFile(data.fileUrl)
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} else if (fileExt === 'pdf') {
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// PDF文件使用vue-pdf-embed预览
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await loadPdfFile(data.fileUrl)
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} else {
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// 其他文件直接预览
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previewUrl.value = data.fileUrl
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loading.value = false
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}
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} catch (err) {
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handleError('文件加载失败', err)
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}
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}
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// 加载PDF文件
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const loadPdfFile = async (fileUrl) => {
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try {
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// 先显示下载状态
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loading.value = false
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downloading.value = true
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downloadProgress.value = 0
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// 使用fetch下载文件并跟踪进度
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const response = await fetch(fileUrl)
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if (!response.ok) {
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throw new Error('文件下载失败')
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}
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const contentLength = response.headers.get('content-length')
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const total = parseInt(contentLength, 10)
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let loaded = 0
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// 创建读取器
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const reader = response.body.getReader()
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const chunks = []
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while (true) {
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const { done, value } = await reader.read()
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if (done) break
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chunks.push(value)
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loaded += value.length
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// 更新下载进度
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if (total) {
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downloadProgress.value = Math.round((loaded / total) * 100)
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}
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}
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// 创建Blob URL
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const blob = new Blob(chunks)
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const blobUrl = URL.createObjectURL(blob)
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// 设置PDF源
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previewUrl.value = fileUrl
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pdfSource.value = blobUrl
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// 重置状态
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downloading.value = false
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downloadProgress.value = 0
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// 使用nextTick确保DOM更新
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nextTick(() => {
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// PDF组件会自动开始加载，loading状态会在handlePdfLoaded中设置为false
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})
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} catch (err) {
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downloading.value = false
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downloadProgress.value = 0
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handleError('PDF文件下载失败', err)
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}
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}
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// 加载文本文件
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const loadTextFile = async (fileUrl) => {
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try {
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const response = await fetch(fileUrl)
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if (!response.ok) throw new Error('无法加载文本文件')
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const text = await response.text()
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textContent.value = text
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loading.value = false
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} catch (err) {
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handleError('文本文件加载失败', err)
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}
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}
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// 上传文件获取office获取pdf文件
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async function getFilePdf(fileUrl) {
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try {
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loadingText.value = '正在转换文件...'
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const res = await convertFileApi({ file_url: fileUrl })
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if (res.meta.code !== 200) {
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throw new Error(res.meta.msg || '文件转换失败')
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}
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convertTaskId.value = res.data.task_id
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loadingText.value = '正在等待转换完成...'
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// 开始轮询转换状态
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startStatusPolling()
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} catch (err) {
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handleError('文件转换失败', err)
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}
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}
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// 开始轮询转换状态
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const startStatusPolling = () => {
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// 清除之前的轮询
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if (statusCheckInterval.value) {
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clearInterval(statusCheckInterval.value)
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}
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// 设置新的轮询
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statusCheckInterval.value = setInterval(async () => {
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try {
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const fileRes = await getConvertStatusApi(convertTaskId.value)
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if (fileRes.meta.code === 200) {
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if (fileRes.data.status === 'completed') {
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// 转换完成
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clearInterval(statusCheckInterval.value)
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previewUrl.value = fileRes.data.output_file
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pdfSource.value = fileRes.data.output_file
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loading.value = false
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} else if (fileRes.data.status === 'failed') {
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// 转换失败
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clearInterval(statusCheckInterval.value)
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throw new Error('文件转换失败')
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}
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// 其他状态继续等待
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} else {
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throw new Error(fileRes.meta.msg || '获取转换状态失败')
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}
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} catch (err) {
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clearInterval(statusCheckInterval.value)
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handleError('获取转换状态失败', err)
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}
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}, 2000) // 每2秒检查一次
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}
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// PDF相关方法
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const handlePdfLoaded = (data) => {
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pageCount.value = data.numPages
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pdfDocument.value = data
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loading.value = false
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}
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const handlePdfRendered = () => {
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console.log('PDF页面渲染完成')
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}
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const handlePdfError = (error) => {
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console.error('PDF加载错误:', error)
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handleError('PDF文件加载失败', error)
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}
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const previousPage = () => {
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if (currentPage.value > 1) {
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currentPage.value--
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}
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}
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const nextPage = () => {
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if (currentPage.value < pageCount.value) {
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currentPage.value++
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}
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}
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const zoomIn = () => {
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if (scale.value < 2) {
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scale.value = Math.round((scale.value + 0.1) * 10) / 10
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}
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}
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const zoomOut = () => {
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if (scale.value > 0.5) {
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scale.value = Math.round((scale.value - 0.1) * 10) / 10
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}
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}
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const resetZoom = () => {
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scale.value = 1.0
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}
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const resetPdfState = () => {
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pdfSource.value = ''
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currentPage.value = 1
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pageCount.value = 0
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scale.value = 1.0
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pdfDocument.value = null
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}
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// 处理图片加载完成
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const handleImageLoad = () => {
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loading.value = false
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}
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// 处理错误
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const handleError = (message, error) => {
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console.error('File preview error:', error)
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error.value = true
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errorMessage.value = message
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loading.value = false
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downloading.value = false
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downloadProgress.value = 0
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ElMessage.error(message)
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}
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// 重试预览
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const retryPreview = () => {
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if (currentFileData.value) {
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showEdit(currentFileData.value)
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}
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}
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// 下载文件
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const downloadFile = () => {
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if (currentFileData.value && currentFileData.value.fileUrl) {
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const link = document.createElement('a')
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link.href = currentFileData.value.fileUrl
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link.download = fileName.value
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document.body.appendChild(link)
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link.click()
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document.body.removeChild(link)
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} else {
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ElMessage.warning('无法下载文件')
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}
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}
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// 关闭按钮点击事件
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const close = () => {
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dialogFormVisible.value = false
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resetState()
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}
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// 处理对话框关闭
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const handleClose = (done) => {
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close()
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}
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// 重置状态
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const resetState = () => {
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// 清除轮询
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if (statusCheckInterval.value) {
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clearInterval(statusCheckInterval.value)
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statusCheckInterval.value = null
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}
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// 重置其他状态
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loading.value = false
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downloading.value = false
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downloadProgress.value = 0
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error.value = false
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previewUrl.value = ''
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textContent.value = ''
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currentFileData.value = null
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convertTaskId.value = ''
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resetPdfState()
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}
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// 组件卸载时清理
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onUnmounted(() => {
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if (statusCheckInterval.value) {
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clearInterval(statusCheckInterval.value)
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}
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})
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// 暴露方法给父组件
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defineExpose({
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showEdit,
|
||
close,
|
||
})
|
||
</script>
|
||
|
||
<style lang="scss" scoped>
|
||
.file-preview-dialog {
|
||
.preview-container {
|
||
min-height: 400px;
|
||
display: flex;
|
||
align-items: center;
|
||
justify-content: center;
|
||
|
||
.loading-container, .error-container {
|
||
text-align: center;
|
||
padding: 40px 0;
|
||
|
||
p {
|
||
margin-top: 16px;
|
||
color: #606266;
|
||
}
|
||
|
||
.error-message {
|
||
font-size: 14px;
|
||
color: #F56C6C;
|
||
margin-top: 8px;
|
||
}
|
||
|
||
.download-progress {
|
||
font-size: 14px;
|
||
color: #409EFF;
|
||
margin-top: 8px;
|
||
}
|
||
}
|
||
|
||
.file-content {
|
||
width: 100%;
|
||
height: 100%;
|
||
|
||
.image-preview {
|
||
text-align: center;
|
||
|
||
img {
|
||
max-width: 100%;
|
||
max-height: 70vh;
|
||
object-fit: contain;
|
||
}
|
||
}
|
||
|
||
.pdf-preview, .office-preview {
|
||
.pdf-controls {
|
||
display: flex;
|
||
justify-content: center;
|
||
align-items: center;
|
||
margin-bottom: 16px;
|
||
padding: 8px;
|
||
background: #f5f5f5;
|
||
border-radius: 4px;
|
||
flex-wrap: wrap;
|
||
gap: 8px;
|
||
}
|
||
|
||
.pdf-viewer-container {
|
||
height: 70vh;
|
||
overflow: auto;
|
||
border: 1px solid #e0e0e0;
|
||
border-radius: 4px;
|
||
background: #f9f9f9;
|
||
|
||
.pdf-viewer {
|
||
width: 100%;
|
||
min-height: 100%;
|
||
display: flex;
|
||
justify-content: center;
|
||
|
||
:deep(.vue-pdf-embed) {
|
||
text-align: center;
|
||
}
|
||
|
||
:deep(canvas) {
|
||
max-width: 100%;
|
||
height: auto;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
.video-preview {
|
||
text-align: center;
|
||
|
||
.video-player {
|
||
max-width: 100%;
|
||
max-height: 70vh;
|
||
}
|
||
}
|
||
|
||
.audio-preview {
|
||
text-align: center;
|
||
padding: 40px 0;
|
||
|
||
.audio-player {
|
||
width: 80%;
|
||
}
|
||
}
|
||
|
||
.text-preview {
|
||
height: 70vh;
|
||
overflow: auto;
|
||
background: #f5f5f5;
|
||
padding: 16px;
|
||
border-radius: 4px;
|
||
|
||
pre {
|
||
white-space: pre-wrap;
|
||
word-wrap: break-word;
|
||
margin: 0;
|
||
font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
|
||
font-size: 14px;
|
||
line-height: 1.5;
|
||
}
|
||
}
|
||
|
||
.unsupported-preview {
|
||
text-align: center;
|
||
padding: 40px 0;
|
||
|
||
p {
|
||
margin-top: 16px;
|
||
color: #606266;
|
||
}
|
||
|
||
.file-name {
|
||
font-size: 14px;
|
||
color: #909399;
|
||
margin-top: 8px;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
.dialog-footer {
|
||
display: flex;
|
||
justify-content: space-between;
|
||
}
|
||
}
|
||
|
||
@media (max-width: 768px) {
|
||
.file-preview-dialog {
|
||
width: 95% !important;
|
||
|
||
.preview-container {
|
||
min-height: 300px;
|
||
|
||
.file-content {
|
||
.pdf-preview, .office-preview {
|
||
.pdf-viewer-container {
|
||
height: 50vh;
|
||
}
|
||
}
|
||
|
||
.text-preview {
|
||
height: 50vh;
|
||
}
|
||
}
|
||
}
|
||
|
||
.pdf-controls {
|
||
flex-direction: column;
|
||
gap: 8px;
|
||
|
||
.el-button-group {
|
||
width: 100%;
|
||
display: flex;
|
||
|
||
.el-button {
|
||
flex: 1;
|
||
font-size: 12px;
|
||
padding: 8px 4px;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
</style> |