From e4497785fd1664f41f53f3e11ac21f2aa6dd681d Mon Sep 17 00:00:00 2001
From: "liang.chao" <1360241448@qq.com>
Date: Sat, 29 Nov 2025 14:48:04 +0800
Subject: [PATCH] =?UTF-8?q?=E6=8F=90=E4=BA=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/views/viewFile/viewFile.vue | 481 +++++++-------------------------
 1 file changed, 103 insertions(+), 378 deletions(-)

diff --git a/src/views/viewFile/viewFile.vue b/src/views/viewFile/viewFile.vue
index b22194a8..6e84b348 100644
--- a/src/views/viewFile/viewFile.vue
+++ b/src/views/viewFile/viewFile.vue
@@ -1,5 +1,4 @@
 <template>
-  <!-- 预览文件 -->
   <el-dialog
     v-model="dialogVisible"
     :title="title"
@@ -9,88 +8,53 @@
     :append-to-body="true"
     :width="width > 500 ? '700px' : '500px'"
   >
-    <div style="text-align:center">
+    <div style="text-align: center; height: 70vh; display: flex; align-items: center; justify-content: center;">
+      <!-- Loading 状态 -->
+      <div v-if="loading" class="loading-state">
+        <el-icon class="is-loading"><Loading /></el-icon>
+        <p>加载中...</p>
+      </div>
+
+      <!-- 错误状态 -->
+      <div v-else-if="error" class="error-state">
+        <el-icon><Warning /></el-icon>
+        <p>文件加载失败</p>
+        <el-button size="small" @click="retryLoad">重试</el-button>
+      </div>
+
       <!-- 图片预览 -->
-      <template v-if="isImage">
-        <div class="image-toolbar">
-          <!-- <el-button size="small" @click="downloadFile"><el-icon><Download /></el-icon> 下载</el-button> -->
-        </div>
+      <template v-else-if="isImage">
         <el-image
           :src="processedFileUrl"
-          :preview-src-list="previewList"
+          :preview-src-list="[processedFileUrl]"
           fit="contain"
-          style="max-width:100%;max-height:70vh"
+          style="max-width: 100%; max-height: 70vh;"
         >
           <template #error>
-            <div class="image-slot">
+            <div class="image-error">
               <el-icon><Picture /></el-icon>
+              <p>图片加载失败</p>
             </div>
           </template>
         </el-image>
       </template>
 
       <!-- PDF 预览 -->
+      <template v-else-if="isPdf">
+        <div class="pdf-viewer">
+          <iframe
+            :src="processedFileUrl"
+            style="width: 100%; height: 100%; border: none;"
+            frameborder="0"
+          ></iframe>
+        </div>
+      </template>
+
+      <!-- 不支持的类型 -->
       <template v-else>
-        <div class="pdf-container">
-          <!-- PDF加载状态 -->
-          <div v-if="pdfLoading" class="pdf-loading">
-            <el-icon class="is-loading"><Loading /></el-icon>
-            <p>PDF加载中...</p>
-          </div>
-
-          <!-- PDF错误状态 -->
-          <div v-else-if="pdfError" class="pdf-error">
-            <el-icon><Warning /></el-icon>
-            <p>PDF加载失败</p>
-            <el-button size="small" @click="retryLoadPdf">重试</el-button>
-          </div>
-
-          <!-- PDF内容 -->
-          <div v-else class="pdf-content">
-            <!-- PDF工具栏 -->
-            <div class="pdf-toolbar">
-              <div class="pdf-controls">
-                <el-button
-                  size="small"
-                  :disabled="currentPage <= 1"
-                  @click="prevPage"
-                >
-                  <el-icon><ArrowLeft /></el-icon> 上一页
-                </el-button>
-                <span class="page-info">
-                  {{ currentPage }} / {{ numPages }}
-                </span>
-                <el-button
-                  size="small"
-                  :disabled="currentPage >= numPages"
-                  @click="nextPage"
-                >
-                  下一页 <el-icon><ArrowRight /></el-icon>
-                </el-button>
-              </div>
-              <div class="pdf-actions">
-                <!-- <el-button size="small" @click="downloadFile"><el-icon><Download /></el-icon> 下载</el-button> -->
-              </div>
-            </div>
-
-            <!-- PDF显示区域 -->
-            <div class="pdf-viewer" @wheel="handleWheel" ref="pdfViewer">
-              <!-- 注意：vue-pdf 需要安装兼容 Vue3 的版本 -->
-              <!-- <pdf
-                :src="processedFileUrl"
-                :page="currentPage"
-                @num-pages="numPages = $event"
-                @loaded="onPdfLoaded"
-                @error="onPdfError"
-                style="width:100%;height:70vh"
-              /> -->
-              <div class="pdf-placeholder">
-                <el-icon><Document /></el-icon>
-                <p>PDF预览功能</p>
-                <p>需要安装 vue-pdf 的 Vue3 兼容版本</p>
-              </div>
-            </div>
-          </div>
+        <div class="unsupported">
+          <el-icon><Document /></el-icon>
+          <p>不支持的文件类型</p>
         </div>
       </template>
     </div>
@@ -98,294 +62,115 @@
 </template>
 
 <script setup>
-import { ref, reactive, computed, onMounted, watch, nextTick } from 'vue'
+import { ref, computed, onMounted } from 'vue'
 import {
-  Document,
   Picture,
   Loading,
   Warning,
-  ArrowLeft,
-  ArrowRight,
-  Download
+  Document
 } from '@element-plus/icons-vue'
-// 注意：需要安装兼容 Vue3 的 pdf 组件
-// import pdf from 'vue-pdf'
 import { getFileAsBase64Api } from '@/api/archivesManagement/fileManager/fileManager'
 
 const props = defineProps({
-  width: {
-    type: [Number, String],
-    default: 600
-  },
-  hight: {
-    type: [Number, String],
-    default: 400
-  },
-  dataForm: {
-    type: Object,
-    default: () => ({})
-  },
-  title: {
-    type: String,
-    default: '文件预览'
-  },
-  disabled: {
-    type: Boolean,
-    default: false
-  },
-  isAdd: {
-    type: String,
-    default: ''
-  },
-  rowData: {
-    type: Object,
-    default: () => ({})
-  },
-  projectId: {
-    type: String,
-    default: ''
-  }
+  width: { type: [Number, String], default: 600 },
+  title: { type: String, default: '文件预览' },
+  rowData: { type: Object, default: () => ({}) }
 })
 
-const emit = defineEmits(['closeDialog', 'showColose'])
+const emit = defineEmits(['closeDialog'])
 
 // 响应式数据
 const dialogVisible = ref(true)
 const fileUrl = ref('')
 const fileName = ref('')
-const previewList = ref([])
-const pdfLoading = ref(false)
-const pdfError = ref(false)
-const currentPage = ref(1)
-const numPages = ref(0)
-const wheelTimeout = ref(null)
-const isWheelScrolling = ref(false)
-const pdfViewer = ref()
+const loading = ref(false)
+const error = ref(false)
 
-// 计算属性
+// 判断是否是图片
 const isImage = computed(() => {
   const exts = ['.jpg', '.jpeg', '.png', '.gif', '.bmp', '.webp']
-  const url = (fileUrl.value || '')
   const name = (fileName.value || '').toLowerCase()
-  return exts.some(ext => url.endsWith(ext) || name.endsWith(ext))
+  return exts.some(ext => name.endsWith(ext))
 })
 
+// 判断是否是 PDF
 const isPdf = computed(() => {
-  const exts = ['.pdf']
-  const url = (fileUrl.value || '')
   const name = (fileName.value || '').toLowerCase()
-  return exts.some(ext => url.endsWith(ext) || name.endsWith(ext))
+  return name.endsWith('.pdf')
 })
 
+// 获取图片 MIME 类型
+function getImageMimeType() {
+  const name = (fileName.value || '').toLowerCase()
+  if (name.endsWith('.png')) return 'image/png'
+  if (name.endsWith('.gif')) return 'image/gif'
+  if (name.endsWith('.bmp')) return 'image/bmp'
+  if (name.endsWith('.webp')) return 'image/webp'
+  return 'image/jpeg'
+}
+
+// 处理后的文件 URL（添加 data: 前缀）
 const processedFileUrl = computed(() => {
-  if (fileUrl.value && !fileUrl.value.startsWith('data:')) {
-    if (isPdf.value) {
-      return `data:application/pdf;base64,${fileUrl.value}`
-    } else if (isImage.value) {
-      const imageType = getImageMimeType()
-      return `data:${imageType};base64,${fileUrl.value}`
-    }
+  const url = fileUrl.value
+  if (!url) return ''
+
+  if (url.startsWith('data:')) return url
+
+  if (isPdf.value) {
+    return `data:application/pdf;base64,${url}`
+  } else if (isImage.value) {
+    const mime = getImageMimeType()
+    return `data:${mime};base64,${url}`
   }
-  return fileUrl.value
+  return url
 })
 
-// 方法
+// 关闭弹窗
 const handleClose = () => {
   dialogVisible.value = false
   emit('closeDialog')
 }
 
-/* 获取文件的base64 */
-const getFileAsBase64 = async () => {
-  if (isPdf.value) {
-    pdfLoading.value = true
-    pdfError.value = false
-  }
+// 获取文件 base64
+const loadFile = async () => {
+  loading.value = true
+  error.value = false
 
   try {
     const res = await getFileAsBase64Api({ id: props.rowData.fileId })
-    const obj = res.data
-    fileUrl.value = obj?.fileBase64 || ''
-    fileName.value = obj?.fileName || ''
+    const obj = res.data.data
 
-    if (isImage.value && fileUrl.value) {
-      previewList.value = [processedFileUrl.value]
+    if (!obj?.fileBase64) {
+      throw new Error('文件数据为空')
     }
-  } catch (error) {
-    if (isPdf.value) {
-      pdfError.value = true
-      pdfLoading.value = false
-    }
-    console.error('获取文件失败:', error)
+
+    fileName.value = obj.fileName || ''
+    fileUrl.value = obj.fileBase64
+
+    loading.value = false
+  } catch (err) {
+    console.error('获取文件失败:', err)
+    error.value = true
+    loading.value = false
   }
 }
 
-// PDF相关方法
-const resetPdfState = () => {
-  currentPage.value = 1
-  numPages.value = 0
-  pdfLoading.value = false
-  pdfError.value = false
-  isWheelScrolling.value = false
-  if (wheelTimeout.value) {
-    clearTimeout(wheelTimeout.value)
-    wheelTimeout.value = null
-  }
+// 重试
+const retryLoad = () => {
+  loadFile()
 }
 
-const onPdfLoaded = () => {
-  pdfLoading.value = false
-  pdfError.value = false
-}
-
-const onPdfError = (error) => {
-  pdfLoading.value = false
-  pdfError.value = true
-  console.error('PDF加载失败:', error)
-}
-
-const retryLoadPdf = () => {
-  resetPdfState()
-  getFileAsBase64()
-}
-
-const prevPage = () => {
-  if (currentPage.value > 1) {
-    currentPage.value--
-  }
-}
-
-const nextPage = () => {
-  if (currentPage.value < numPages.value) {
-    currentPage.value++
-  }
-}
-
-// 下载文件
-const downloadFile = () => {
-  if (!fileUrl.value) return
-  const filename = fileName.value || '文件'
-
-  let mime = isPdf.value ? 'application/pdf' : getImageMimeType()
-
-  let base64Data = fileUrl.value
-  if (typeof base64Data === 'string' && base64Data.startsWith('data:')) {
-    try {
-      const parts = base64Data.split(',')
-      const header = parts[0]
-      const dataPart = parts[1]
-      const match = header.match(/^data:(.*?);base64$/)
-      if (match && match[1]) mime = match[1]
-      base64Data = dataPart
-    } catch (e) {
-      // 解析失败则按原样处理
-    }
-  }
-
-  const blob = base64ToBlob(base64Data, mime)
-  const url = URL.createObjectURL(blob)
-  const a = document.createElement('a')
-  a.style.display = 'none'
-  a.href = url
-  a.download = filename
-  document.body.appendChild(a)
-  a.click()
-  document.body.removeChild(a)
-  URL.revokeObjectURL(url)
-}
-
-// base64转Blob
-const base64ToBlob = (base64, mime) => {
-  const byteChars = atob(base64)
-  const sliceSize = 1024
-  const byteArrays = []
-  for (let offset = 0; offset < byteChars.length; offset += sliceSize) {
-    const slice = byteChars.slice(offset, offset + sliceSize)
-    const byteNumbers = new Array(slice.length)
-    for (let i = 0; i < slice.length; i++) {
-      byteNumbers[i] = slice.charCodeAt(i)
-    }
-    const byteArray = new Uint8Array(byteNumbers)
-    byteArrays.push(byteArray)
-  }
-  return new Blob(byteArrays, { type: mime || 'application/octet-stream' })
-}
-
-// 获取图片MIME类型
-const getImageMimeType = () => {
-  const name = (fileName.value || '').toLowerCase()
-  if (name.endsWith('.jpg') || name.endsWith('.jpeg')) {
-    return 'image/jpeg'
-  } else if (name.endsWith('.png')) {
-    return 'image/png'
-  } else if (name.endsWith('.gif')) {
-    return 'image/gif'
-  } else if (name.endsWith('.bmp')) {
-    return 'image/bmp'
-  } else if (name.endsWith('.webp')) {
-    return 'image/webp'
-  }
-  return 'image/jpeg'
-}
-
-// 处理滚轮事件
-const handleWheel = (event) => {
-  event.preventDefault()
-
-  if (isWheelScrolling.value) {
-    return
-  }
-
-  isWheelScrolling.value = true
-
-  if (wheelTimeout.value) {
-    clearTimeout(wheelTimeout.value)
-  }
-
-  if (event.deltaY > 0) {
-    nextPage()
-  } else if (event.deltaY < 0) {
-    prevPage()
-  }
-
-  wheelTimeout.value = setTimeout(() => {
-    isWheelScrolling.value = false
-  }, 300)
-}
-
-// 监听器
-watch(isPdf, (newVal) => {
-  if (newVal) {
-    resetPdfState()
-  }
-})
-
 // 生命周期
 onMounted(() => {
-  getFileAsBase64()
+  loadFile()
 })
 </script>
 
 <style scoped>
-.image-slot {
-  width: 100%;
-  height: 240px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  color: #909399;
-  font-size: 24px;
-}
-
-/* PDF预览样式 */
-.pdf-container {
-  width: 100%;
-  height: 70vh;
-  position: relative;
-}
-
-.pdf-loading,
-.pdf-error {
+.loading-state,
+.error-state,
+.image-error,
+.unsupported {
   display: flex;
   flex-direction: column;
   align-items: center;
@@ -395,89 +180,29 @@ onMounted(() => {
   font-size: 16px;
 }
 
-.pdf-loading .el-icon {
+.loading-state .el-icon,
+.error-state .el-icon,
+.unsupported .el-icon {
   font-size: 32px;
   margin-bottom: 16px;
-  animation: rotating 2s linear infinite;
 }
 
-.pdf-error .el-icon {
-  font-size: 32px;
-  margin-bottom: 16px;
-  color: #F56C6C;
+.error-state .el-icon {
+  color: #f56c6c;
 }
 
-.pdf-content {
-  height: 100%;
-  display: flex;
-  flex-direction: column;
-}
-
-.pdf-toolbar {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  padding: 8px 12px;
-  background: #f5f5f5;
-  border-bottom: 1px solid #e4e7ed;
-  flex-shrink: 0;
-}
-
-.pdf-controls {
-  display: flex;
-  align-items: center;
-  gap: 8px;
-}
-
-.image-toolbar {
-  display: flex;
-  justify-content: flex-end;
-  padding: 4px 0 8px 0;
-}
-
-.pdf-actions {
-  display: flex;
-  align-items: center;
-  gap: 8px;
-}
-
-.page-info {
-  font-size: 14px;
-  color: #606266;
-  min-width: 60px;
-  text-align: center;
+.unsupported .el-icon {
+  font-size: 48px;
 }
 
 .pdf-viewer {
-  flex: 1;
-  overflow: hidden;
-  display: flex;
-  justify-content: center;
+  width: 100%;
+  height: 70vh;
   background: #f8f9fa;
-  cursor: pointer;
-}
-
-.pdf-placeholder {
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: center;
-  height: 100%;
-  color: #909399;
-  font-size: 16px;
-}
-
-.pdf-placeholder .el-icon {
-  font-size: 48px;
-  margin-bottom: 16px;
 }
 
 @keyframes rotating {
-  0% {
-    transform: rotate(0deg);
-  }
-  100% {
-    transform: rotate(360deg);
-  }
+  0% { transform: rotate(0deg); }
+  100% { transform: rotate(360deg); }
 }
 </style>