<!-- 文件预览组件(通过文件名获取文件url) -->
<script lang="ts" setup name="FilePreview">
import * as pdfjsLib from 'pdfjs-dist/build/pdf'
import 'pdfjs-dist/web/pdf_viewer.css'
import { ElLoading } from 'element-plus'
import { getPhotoUrl } from '@/api/file'
// 打印文件url
const props = defineProps({
  printFileName: {
    type: String,
  },
})
const pdfContainer = ref(null)
const pdfUrl = ref('')

async function loadPDF(url: string) {
  const loadingTask = pdfjsLib.getDocument(url)
  const pdf = await loadingTask.promise
  // 渲染逻辑（分页、Canvas绘制等）
}

/**
 * 初始化
 */
function init() {
  const loading = ElLoading.service({
    lock: true,
    text: '加载中...',
    background: 'rgba(255, 255, 255, 0.6)',
  })
  getPhotoUrl(props.printFileName!).then((res: any) => {
    console.log('文件名称', props.printFileName)
    pdfUrl.value = res.data
    loadPDF('/document.pdf')
    console.log('pdfurl', pdfUrl.value)
    loading.close()
  })
}

watch(() => props.printFileName, (newVal) => {
  console.log('newVal', newVal)
  if (newVal) {
    init()
  }
}, { immediate: true })
</script>

<template>
  <div ref="pdfContainer" />
</template>

<style scoped lang="scss">
.a {
  font-size: 10px;
}
</style>