javascript - 如何在 webpack 和 Vuejs 中使用带有工具栏的完整 PDF.js 查看器？

Question

我正在使用 vue.js spa 和 webpack 尝试使用 mozilla 的 PDF.js 显示 PDF。我得到了 examples工作起来很容易，但我很难让工具栏正常工作。我需要带有 require('pdfjs-dist/webpack') 的 PDFjs，因此它不会发送“已设置假 worker ”警告。我真的找不到解释如何将完整查看器与 webpack 一起使用的 SO 问题/指南或视频。这个项目的文档也几乎不存在，我想我也尽了一切可能在那里找到。

抱歉，如果这看起来像一个愚蠢的问题，但我花了很多时间来解决这个问题并点击了我可以通过谷歌搜索找到的每个链接。

先谢谢大家

我已经从示例中获得的代码:

var PDFJS = require('pdfjs-dist/webpack');

  const url = 'the-url-to-my-pdf';
  const canvasContainer = document.getElementById('preview');

  function renderPage(page) {
    const viewport = page.getViewport(2);
    let canvas = document.createElement('canvas');
    let canvasWrapper = document.createElement('div');
    canvasWrapper.classList.add('page');
    const ctx = canvas.getContext('2d');
    const renderContext = {
      canvasContext: ctx,
      viewport: viewport
    };
    canvas.height = viewport.height;
    canvas.width = viewport.width;
    canvasWrapper.appendChild(canvas);
    canvasContainer.appendChild(canvasWrapper);

    page.render(renderContext);
  }

  function renderPages(pdfDoc) {
    for(var num = 1; num <= pdfDoc.numPages; num++) {
      pdfDoc.getPage(num).then(renderPage);
    }
  }

  PDFJS.getDocument(url).then(renderPages);

元素 'preview' 只是多个 pdf 页面的包装器 div

Answer 1

这是一个完整的例子——完整​​的单文件 Vue 组件:

<template>
  <div class="pdfjs">
    <div id="outerContainer">

      <div id="sidebarContainer">
        <div id="toolbarSidebar">
          <div class="splitToolbarButton toggled">
            <button id="viewThumbnail" class="toolbarButton group toggled" title="Show Thumbnails" tabindex="2" data-l10n-id="thumbs">
              <span data-l10n-id="thumbs_label">Thumbnails</span>
            </button>
            <button id="viewOutline" class="toolbarButton group" title="Show Document Outline (double-click to expand/collapse all items)" tabindex="3" data-l10n-id="document_outline">
              <span data-l10n-id="document_outline_label">Document Outline</span>
            </button>
            <button id="viewAttachments" class="toolbarButton group" title="Show Attachments" tabindex="4" data-l10n-id="attachments">
              <span data-l10n-id="attachments_label">Attachments</span>
            </button>
          </div>
        </div>
        <div id="sidebarContent">
          <div id="thumbnailView">
          </div>
          <div id="outlineView" class="hidden">
          </div>
          <div id="attachmentsView" class="hidden">
          </div>
        </div>
      </div>  <!-- sidebarContainer -->

      <div id="mainContainer">
        <div class="findbar hidden doorHanger hiddenSmallView" id="findbar">
          <label for="findInput" class="toolbarLabel" data-l10n-id="find_label">Find:</label>
          <input id="findInput" class="toolbarField" tabindex="91">
          <div class="splitToolbarButton">
            <button class="toolbarButton findPrevious" title="" id="findPrevious" tabindex="92" data-l10n-id="find_previous">
              <span data-l10n-id="find_previous_label">Previous</span>
            </button>
            <div class="splitToolbarButtonSeparator"></div>
            <button class="toolbarButton findNext" title="" id="findNext" tabindex="93" data-l10n-id="find_next">
              <span data-l10n-id="find_next_label">Next</span>
            </button>
          </div>
          <input type="checkbox" id="findHighlightAll" class="toolbarField" tabindex="94">
          <label for="findHighlightAll" class="toolbarLabel" data-l10n-id="find_highlight">Highlight all</label>
          <input type="checkbox" id="findMatchCase" class="toolbarField" tabindex="95">
          <label for="findMatchCase" class="toolbarLabel" data-l10n-id="find_match_case_label">Match case</label>
          <span id="findResultsCount" class="toolbarLabel hidden"></span>
          <span id="findMsg" class="toolbarLabel"></span>
        </div>  <!-- findbar -->

        <div id="secondaryToolbar" class="secondaryToolbar hidden doorHangerRight">
          <div id="secondaryToolbarButtonContainer">
            <button id="secondaryPresentationMode" class="secondaryToolbarButton presentationMode visibleLargeView" title="Switch to Presentation Mode" tabindex="51" data-l10n-id="presentation_mode">
              <span data-l10n-id="presentation_mode_label">Presentation Mode</span>
            </button>

            <button id="secondaryOpenFile" class="secondaryToolbarButton openFile visibleLargeView" title="Open File" tabindex="52" data-l10n-id="open_file">
              <span data-l10n-id="open_file_label">Open</span>
            </button>

            <button id="secondaryPrint" class="secondaryToolbarButton print visibleMediumView" title="Print" tabindex="53" data-l10n-id="print">
              <span data-l10n-id="print_label">Print</span>
            </button>

            <button id="secondaryDownload" class="secondaryToolbarButton download visibleMediumView" title="Download" tabindex="54" data-l10n-id="download">
              <span data-l10n-id="download_label">Download</span>
            </button>

            <a href="#" id="secondaryViewBookmark" class="secondaryToolbarButton bookmark visibleSmallView" title="Current view (copy or open in new window)" tabindex="55" data-l10n-id="bookmark">
              <span data-l10n-id="bookmark_label">Current View</span>
            </a>

            <div class="horizontalToolbarSeparator visibleLargeView"></div>

            <button id="firstPage" class="secondaryToolbarButton firstPage" title="Go to First Page" tabindex="56" data-l10n-id="first_page">
              <span data-l10n-id="first_page_label">Go to First Page</span>
            </button>
            <button id="lastPage" class="secondaryToolbarButton lastPage" title="Go to Last Page" tabindex="57" data-l10n-id="last_page">
              <span data-l10n-id="last_page_label">Go to Last Page</span>
            </button>

            <div class="horizontalToolbarSeparator"></div>

            <button id="pageRotateCw" class="secondaryToolbarButton rotateCw" title="Rotate Clockwise" tabindex="58" data-l10n-id="page_rotate_cw">
              <span data-l10n-id="page_rotate_cw_label">Rotate Clockwise</span>
            </button>
            <button id="pageRotateCcw" class="secondaryToolbarButton rotateCcw" title="Rotate Counterclockwise" tabindex="59" data-l10n-id="page_rotate_ccw">
              <span data-l10n-id="page_rotate_ccw_label">Rotate Counterclockwise</span>
            </button>

            <div class="horizontalToolbarSeparator"></div>

            <button id="toggleHandTool" class="secondaryToolbarButton handTool" title="Enable hand tool" tabindex="60" data-l10n-id="hand_tool_enable">
              <span data-l10n-id="hand_tool_enable_label">Enable hand tool</span>
            </button>

            <div class="horizontalToolbarSeparator"></div>

            <button id="documentProperties" class="secondaryToolbarButton documentProperties" title="Document Properties…" tabindex="61" data-l10n-id="document_properties">
              <span data-l10n-id="document_properties_label">Document Properties…</span>
            </button>
          </div>
        </div>  <!-- secondaryToolbar -->

        <div class="toolbar">
          <div id="toolbarContainer">
            <div id="toolbarViewer">
              <div id="toolbarViewerLeft">
                <button id="sidebarToggle" class="toolbarButton" title="Toggle Sidebar" tabindex="11" data-l10n-id="toggle_sidebar">
                  <span data-l10n-id="toggle_sidebar_label">Toggle Sidebar</span>
                </button>
                <div class="toolbarButtonSpacer"></div>
                <button id="viewFind" class="toolbarButton group hiddenSmallView" title="Find in Document" tabindex="12" data-l10n-id="findbar">
                  <span data-l10n-id="findbar_label">Find</span>
                </button>
                <div class="splitToolbarButton">
                  <button class="toolbarButton pageUp" title="Previous Page" id="previous" tabindex="13" data-l10n-id="previous">
                    <span data-l10n-id="previous_label">Previous</span>
                  </button>
                  <div class="splitToolbarButtonSeparator"></div>
                  <button class="toolbarButton pageDown" title="Next Page" id="next" tabindex="14" data-l10n-id="next">
                    <span data-l10n-id="next_label">Next</span>
                  </button>
                </div>
                <input type="number" id="pageNumber" class="toolbarField pageNumber" title="Page" value="1" size="4" min="1" tabindex="15" data-l10n-id="page">
                <span id="numPages" class="toolbarLabel"></span>
              </div>
              <div id="toolbarViewerRight">
                <button id="presentationMode" class="toolbarButton presentationMode hiddenLargeView" title="Switch to Presentation Mode" tabindex="31" data-l10n-id="presentation_mode">
                  <span data-l10n-id="presentation_mode_label">Presentation Mode</span>
                </button>

                <button id="openFile" class="toolbarButton openFile hiddenLargeView" title="Open File" tabindex="32" data-l10n-id="open_file">
                  <span data-l10n-id="open_file_label">Open</span>
                </button>

                <button id="print" class="toolbarButton print hiddenMediumView" title="Print" tabindex="33" data-l10n-id="print">
                  <span data-l10n-id="print_label">Print</span>
                </button>

                <button id="download" class="toolbarButton download hiddenMediumView" title="Download" tabindex="34" data-l10n-id="download">
                  <span data-l10n-id="download_label">Download</span>
                </button>
                <a href="#" id="viewBookmark" class="toolbarButton bookmark hiddenSmallView" title="Current view (copy or open in new window)" tabindex="35" data-l10n-id="bookmark">
                  <span data-l10n-id="bookmark_label">Current View</span>
                </a>

                <div class="verticalToolbarSeparator hiddenSmallView"></div>

                <button id="secondaryToolbarToggle" class="toolbarButton" title="Tools" tabindex="36" data-l10n-id="tools">
                  <span data-l10n-id="tools_label">Tools</span>
                </button>
              </div>
              <div id="toolbarViewerMiddle">
                <div class="splitToolbarButton">
                  <button id="zoomOut" class="toolbarButton zoomOut" title="Zoom Out" tabindex="21" data-l10n-id="zoom_out">
                    <span data-l10n-id="zoom_out_label">Zoom Out</span>
                  </button>
                  <div class="splitToolbarButtonSeparator"></div>
                  <button id="zoomIn" class="toolbarButton zoomIn" title="Zoom In" tabindex="22" data-l10n-id="zoom_in">
                    <span data-l10n-id="zoom_in_label">Zoom In</span>
                  </button>
                </div>
                <span id="scaleSelectContainer" class="dropdownToolbarButton">
                  <select id="scaleSelect" title="Zoom" tabindex="23" data-l10n-id="zoom">
                    <option id="pageAutoOption" title="" value="auto" selected="selected" data-l10n-id="page_scale_auto">Automatic Zoom</option>
                    <option id="pageActualOption" title="" value="page-actual" data-l10n-id="page_scale_actual">Actual Size</option>
                    <option id="pageFitOption" title="" value="page-fit" data-l10n-id="page_scale_fit">Fit Page</option>
                    <option id="pageWidthOption" title="" value="page-width" data-l10n-id="page_scale_width">Full Width</option>
                    <option id="customScaleOption" title="" value="custom" disabled="disabled" hidden="true"></option>
                    <option title="" value="0.5" data-l10n-id="page_scale_percent" data-l10n-args='{ "scale": 50 }'>50%</option>
                    <option title="" value="0.75" data-l10n-id="page_scale_percent" data-l10n-args='{ "scale": 75 }'>75%</option>
                    <option title="" value="1" data-l10n-id="page_scale_percent" data-l10n-args='{ "scale": 100 }'>100%</option>
                    <option title="" value="1.25" data-l10n-id="page_scale_percent" data-l10n-args='{ "scale": 125 }'>125%</option>
                    <option title="" value="1.5" data-l10n-id="page_scale_percent" data-l10n-args='{ "scale": 150 }'>150%</option>
                    <option title="" value="2" data-l10n-id="page_scale_percent" data-l10n-args='{ "scale": 200 }'>200%</option>
                    <option title="" value="3" data-l10n-id="page_scale_percent" data-l10n-args='{ "scale": 300 }'>300%</option>
                    <option title="" value="4" data-l10n-id="page_scale_percent" data-l10n-args='{ "scale": 400 }'>400%</option>
                  </select>
                </span>
              </div>
            </div>
            <div id="loadingBar">
              <div class="progress">
                <div class="glimmer">
                </div>
              </div>
            </div>
          </div>
        </div>

        <div type="context" id="viewerContextMenu">
          <div id="contextFirstPage" label="First Page"
                    data-l10n-id="first_page"></div>
          <div id="contextLastPage" label="Last Page"
                    data-l10n-id="last_page"></div>
          <div id="contextPageRotateCw" label="Rotate Clockwise"
                    data-l10n-id="page_rotate_cw"></div>
          <div id="contextPageRotateCcw" label="Rotate Counter-Clockwise"
                    data-l10n-id="page_rotate_ccw"></div>
        </div>

        <div id="viewerContainer" tabindex="0" v-loading="loading">
          <div id="viewer" class="pdfViewer"></div>
        </div>

        <div id="errorWrapper" hidden='true'>
          <div id="errorMessageLeft">
            <span id="errorMessage"></span>
            <button id="errorShowMore" data-l10n-id="error_more_info">
              More Information
            </button>
            <button id="errorShowLess" data-l10n-id="error_less_info" hidden='true'>
              Less Information
            </button>
          </div>
          <div id="errorMessageRight">
            <button id="errorClose" data-l10n-id="error_close">
              Close
            </button>
          </div>
          <div class="clearBoth"></div>
          <textarea id="errorMoreInfo" hidden='true' readonly="readonly"></textarea>
        </div>
      </div> <!-- mainContainer -->

      <div id="overlayContainer" class="hidden">
        <div id="passwordOverlay" class="container hidden">
          <div class="dialog">
            <div class="row">
              <p id="passwordText" data-l10n-id="password_label">Enter the password to open this PDF file:</p>
            </div>
            <div class="row">
              <!-- The type="password" attribute is set via script, to prevent warnings in Firefox for all http:// documents. -->
              <input id="password" class="toolbarField">
            </div>
            <div class="buttonRow">
              <button id="passwordCancel" class="overlayButton"><span data-l10n-id="password_cancel">Cancel</span></button>
              <button id="passwordSubmit" class="overlayButton"><span data-l10n-id="password_ok">OK</span></button>
            </div>
          </div>
        </div>
        <div id="documentPropertiesOverlay" class="container hidden">
          <div class="dialog">
            <div class="row">
              <span data-l10n-id="document_properties_file_name">File name:</span> <p id="fileNameField">-</p>
            </div>
            <div class="row">
              <span data-l10n-id="document_properties_file_size">File size:</span> <p id="fileSizeField">-</p>
            </div>
            <div class="separator"></div>
            <div class="row">
              <span data-l10n-id="document_properties_title">Title:</span> <p id="titleField">-</p>
            </div>
            <div class="row">
              <span data-l10n-id="document_properties_author">Author:</span> <p id="authorField">-</p>
            </div>
            <div class="row">
              <span data-l10n-id="document_properties_subject">Subject:</span> <p id="subjectField">-</p>
            </div>
            <div class="row">
              <span data-l10n-id="document_properties_keywords">Keywords:</span> <p id="keywordsField">-</p>
            </div>
            <div class="row">
              <span data-l10n-id="document_properties_creation_date">Creation Date:</span> <p id="creationDateField">-</p>
            </div>
            <div class="row">
              <span data-l10n-id="document_properties_modification_date">Modification Date:</span> <p id="modificationDateField">-</p>
            </div>
            <div class="row">
              <span data-l10n-id="document_properties_creator">Creator:</span> <p id="creatorField">-</p>
            </div>
            <div class="separator"></div>
            <div class="row">
              <span data-l10n-id="document_properties_producer">PDF Producer:</span> <p id="producerField">-</p>
            </div>
            <div class="row">
              <span data-l10n-id="document_properties_version">PDF Version:</span> <p id="versionField">-</p>
            </div>
            <div class="row">
              <span data-l10n-id="document_properties_page_count">Page Count:</span> <p id="pageCountField">-</p>
            </div>
            <div class="buttonRow">
              <button id="documentPropertiesClose" class="overlayButton"><span data-l10n-id="document_properties_close">Close</span></button>
            </div>
          </div>
        </div>
        <div id="printServiceOverlay" class="container hidden">
          <div class="dialog">
            <div class="row">
              <span data-l10n-id="print_progress_message">Preparing document for printing…</span>
            </div>
            <div class="row">
              <progress value="0" max="100"></progress>
              <span data-l10n-id="print_progress_percent" data-l10n-args='{ "progress": 0 }' class="relative-progress">0%</span>
            </div>
            <div class="buttonRow">
              <button id="printCancel" class="overlayButton"><span data-l10n-id="print_progress_close">Cancel</span></button>
            </div>
          </div>
        </div>
      </div>  <!-- overlayContainer -->

    </div> <!-- outerContainer -->
    <div id="printContainer"></div>
  </div>
</template>

<script>
require('pdf.js-viewer/pdf');
require('pdf.js-viewer/viewer.css');

export default
{
  props:
    {
      src:
        {
          type: String,
          required: true
        },
      filename:
        {
          type: String,
          required: true
        }
    },
  data ()
  {
    let a =
      {
        loading: false,
        timer: null
      };
    return a;
  },
  created ()
  {
    document.addEventListener('pagerendered', this.pageRendered);
  },
  beforeDestroy ()
  {
    document.removeEventListener('pagerendered', this.pageRendered);
    if (this.timer) clearInterval(this.timer);
  },
  mounted ()
  {
    this.loadFile();
  },
  watch:
    {
      src: 'loadFile'
    },
  methods:
    {
      loadFile ()
      {
        this.loading = true;
        this.timer = setInterval(this.pollPDF, 100);
        window.PDFJS.workerSrc = '/pdf.worker.js';
        if (window.PDFView.pdfDocument) window.PDFView.pdfDocument.destroy();
        window.PDFJS.webViewerLoad(this.src);
        window.PDFView.setScale('page-width', true);
      },
      pageRendered (evt)
      {
        this.loading = false;
        clearInterval(this.timer);
        this.timer = null;
      },
      pollPDF ()
      {
        if (!window.PDFView.loading) this.pageRendered();
      }
    }
}
</script>

<style>
  .pdfjs
  {
    width: 100%;
    height: 100%;
  }

  .pdfjs #scaleSelectContainer
  {
    min-width: auto !important;
    max-width: none !important;
  }

  #scaleSelect
  {
    min-width: initial !important;
  }

  .pdfjs .dropdownToolbarButton
  {
    background-image: none !important;
  }

  #toolbarViewerLeft
  {
    position: static !important;
  }

  #toolbarViewerRight
  {
    display: none !important;
  }

  #sidebarToggle
  {
    display: none;
  }

  .pdfjs #thumbnailView
  {
    width: 100% !important;
  }

  .pdfjs #errorWrapper
  {
    margin-top: 3px;
  }

  .pdfjs #errorWrapper button
  {
    color: #000;
    padding-left: 6px;
    padding-right: 6px;
  }
</style>