pdf.js增加快捷键放大缩小旋转手型拖动，并增加全屏显示工具栏

src/main/webapp/static/pdfjs/build/pdf.js

@@ -1,3 +1,17 @@
+$(function(){
+  //加载载入组件
+  $("#loading").css("background","url(../../img/load.gif) no-repeat 10px 50%");
+});
+//监听加载文件完成情况，完成后移除加载载入组件
+var interval = setInterval('loadPdf()', 1000);
+function loadPdf() {
+  if (PDFViewerApplication.pdfDocument == null) {
+    $('#myModal').modal('show');
+  } else {
+    clearInterval(interval);
+    $('#myModal').remove();
+  }
+}
 //屏蔽鼠标右键
 document.oncontextmenu = function(e) {
   var e = e || window.event;
@@ -10,12 +24,34 @@ function disabledPrint(){
     event.keyCode=0;
     event.returnValue=false;
   }
-  if (event.ctrlKey && event.keyCode == 83) {
+  if (event.keyCode == 83 && event.ctrlKey) {
     event.preventDefault();
     event.returnValue = false;
     return false;
   }
 }
+document.onkeydown = function(e) {
+  //快捷键ctrl+上图片放大
+  if (38 == e.keyCode && e.ctrlKey) {
+    PDFViewerApplication.zoomIn()
+  }
+  //快捷键ctrl+下图片缩小
+  if (40 == e.keyCode && e.ctrlKey) {
+    PDFViewerApplication.zoomOut()
+  }
+  //快捷键ctrl+←图片顺时针旋转
+  if (37 == e.keyCode && e.ctrlKey){
+    PDFViewerApplication.rotatePages(90);
+  }
+  //快捷键ctrl+右图片逆时针旋转
+  if (39 == e.keyCode && e.ctrlKey){
+    PDFViewerApplication.rotatePages(-90);
+  }
+  //快捷键Tab键启用手型选取
+  if (9 == e.keyCode){
+    HandTool.toggle()
+  }
+}
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
 /* Copyright 2012 Mozilla Foundation
@@ -8035,5 +8071,3 @@ if (!PDFJS.workerSrc && typeof document !== 'undefined') {
     return pdfjsSrc && pdfjsSrc.replace(/\.js$/i, '.worker.js');
   })();
 }
-
-

src/main/webapp/static/pdfjs/web/viewer.html

@@ -26,7 +26,7 @@ http://sourceforge.net/adobe/cmap/wiki/License/
 
 
     <link rel="stylesheet" href="viewer.css"/>
-
+    <link rel="stylesheet" href="../../../static/bootstrap-3.3.7/bower_components/font-awesome/css/font-awesome.min.css"/>
     <script src="compatibility.js"></script>
 
 
@@ -38,9 +38,6 @@ http://sourceforge.net/adobe/cmap/wiki/License/
 <script type="text/javascript" src="../../bootstrap-3.3.7/bower_components/bootstrap/dist/js/bootstrap.min.js"></script>
 <script src="l10n.js"></script>
 <script src="../build/pdf.js"></script>
-
-
-
 <script src="debugger.js"></script>
 <script src="viewer.js"></script>
 
@@ -63,6 +60,32 @@ http://sourceforge.net/adobe/cmap/wiki/License/
       border-radius: 20px;
       filter: progid:DXImageTransform.Microsoft.Alpha(opacity=70);
     }
+    .fullScreamBtn{
+        visibility: hidden;
+        opacity: 0;
+        width: 150px;
+        height: 30px;
+        border-radius: 5px;
+        background: #898989;
+        position: fixed;
+        bottom: 2px;
+        left: calc(100vw / 2 - 75px);
+        z-index: 999;
+        transition: all 0.5s;
+    }
+    .fullScreamBtn i{
+        line-height: 30px;
+        color: white;
+        margin-right: 8px;
+        cursor: pointer;
+    }
+    .fullScreamBtn i:first-child{
+        margin-left: 11px;
+    }
+    .page:hover~.fullScreamBtn,.fullScreamBtn:hover{
+        visibility: visible;
+        opacity: 1;
+    }
   </style>
   </head>
 
@@ -442,49 +465,5 @@ http://sourceforge.net/adobe/cmap/wiki/License/
 </div>
 
   </body>
-<script>
-  $("#loading").css("background","url(../../img/load.gif) no-repeat 10px 50%");
-  var interval = setInterval('loadPdf()', 1000);
-  function loadPdf() {
-    if (PDFViewerApplication.pdfDocument == null) {
-      $('#myModal').modal('show');
-    } else {
-      clearInterval(interval);
-      $('#myModal').remove();
-    }
-  }
-  //屏蔽鼠标右键
-  document.oncontextmenu = function(e) {
-    var e = e || window.event;
-    e.returnValue = false;
-    return false;
-  }
-  //禁止快捷键打印
-  function disabledPrint(){
-    if(event.keyCode==80 && event.ctrlKey){
-      event.keyCode=0;
-      event.returnValue=false;
-    }
-    if (event.ctrlKey && event.keyCode == 83) {
-      event.preventDefault();
-      event.returnValue = false;
-      return false;
-    }
-  }
-  /*$(function() {
-      //PDFFindBar.prototype.open(); //optional if you want to show the search bar
-      var keys = ['人','心','人心'];
-      for (var i = 0; i < keys.length; i++) {
-        var event = document.createEvent('CustomEvent');
-          event.initCustomEvent('find' + 'again', true, true, {
-              query: keys[i],
-              highlightAll: true,
-              findPrevious: false
-          });
-        window.dispatchEvent(event);
-      }
-      //return window.dispatchEvent(event);
-  })*/
-</script>
 </html>
 

src/main/webapp/static/pdfjs/web/viewer.js

@@ -1839,6 +1839,36 @@ var SecondaryToolbar = {
   // Event handling functions.
   presentationModeClick: function secondaryToolbarPresentationModeClick(evt) {
     PDFViewerApplication.requestPresentationMode();
+    $("#viewer").append("<div id='fullScreamBtn' class='fullScreamBtn'><i class='fa fa-search-plus fa-lg' id='plus' title='放大(快捷键ctrl+↑)'></i><i class='fa fa-search-minus fa-lg' id='minus' title='缩小(快捷键ctrl+↓)'></i><i class='fa fa-lg fa-undo' id='undo' title='逆时针旋转(快捷键ctrl+→)'></i><i class='fa fa-repeat fa-lg' id='repeat' title='顺时针旋转(快捷键ctrl+←)'></i><i class='fa fa-hand-paper-o fa-lg' id='hand-paper' title='启用手形工具(键盘按下Tab键)'></i></div>")
+    //阻止外层div鼠标点击冒泡事件
+    document.getElementById("fullScreamBtn").addEventListener("mousedown", function (evt) {
+      evt.stopPropagation();
+    }, false);
+    //图片放大
+    document.getElementById("plus").addEventListener("click",
+        function () {
+          PDFViewerApplication.zoomIn();
+        },false);
+    //图片缩小
+    document.getElementById("minus").addEventListener("click",
+        function () {
+          PDFViewerApplication.zoomOut();
+        },false);
+    //顺时针旋转
+    document.getElementById("repeat").addEventListener("click",
+        function () {
+          PDFViewerApplication.rotatePages(90);
+        },false);
+    //逆时针旋转
+    document.getElementById("undo").addEventListener("click",
+        function () {
+          PDFViewerApplication.rotatePages(-90);
+        },false);
+    //启用手型选取
+    document.getElementById("hand-paper").addEventListener("click",
+        function () {
+          HandTool.toggle();
+        },false);
     this.close();
   },
 
@@ -7328,7 +7358,7 @@ function handleMouseWheel(evt) {
   var direction = (ticks < 0) ? 'zoomOut' : 'zoomIn';
 
   if (PDFViewerApplication.pdfViewer.isInPresentationMode) {
-    evt.preventDefault();
+    //evt.preventDefault();
     PDFViewerApplication.scrollPresentationMode(ticks *
                                                 MOUSE_WHEEL_DELTA_FACTOR);
   } else if (evt.ctrlKey || evt.metaKey) {

src/main/webapp/static/pdfjs/web/viewer1.html

@@ -26,6 +26,7 @@ http://sourceforge.net/adobe/cmap/wiki/License/
 
 
   <link rel="stylesheet" href="viewer.css"/>
+  <link rel="stylesheet" href="../../../static/bootstrap-3.3.7/bower_components/font-awesome/css/font-awesome.min.css"/>
 
   <script src="compatibility.js"></script>
 
@@ -37,12 +38,13 @@ http://sourceforge.net/adobe/cmap/wiki/License/
   <script type="text/javascript" src="../../js/jquery-3.3.1.js"></script>
   <script type="text/javascript" src="../../bootstrap-3.3.7/bower_components/bootstrap/dist/js/bootstrap.min.js"></script>
   <script src="l10n.js"></script>
-  <script src="../build/pdf.js"></script>
+
 
 
 
   <script src="debugger.js"></script>
   <script src="viewer1.js"></script>
+  <script src="../build/pdf.js"></script>
 
   <style>
     .loading {
@@ -63,6 +65,32 @@ http://sourceforge.net/adobe/cmap/wiki/License/
       border-radius: 20px;
       filter: progid:DXImageTransform.Microsoft.Alpha(opacity=70);
     }
+    .fullScreamBtn{
+      visibility: hidden;
+      opacity: 0;
+      width: 150px;
+      height: 30px;
+      border-radius: 5px;
+      background: #898989;
+      position: fixed;
+      bottom: 2px;
+      left: calc(100vw / 2 - 75px);
+      z-index: 999;
+      transition: all 0.5s;
+    }
+    .fullScreamBtn i{
+      line-height: 30px;
+      color: white;
+      margin-right: 8px;
+      cursor: pointer;
+    }
+    .fullScreamBtn i:first-child{
+      margin-left: 11px;
+    }
+    .page:hover~.fullScreamBtn,.fullScreamBtn:hover{
+      visibility: visible;
+      opacity: 1;
+    }
   </style>
 </head>
 
@@ -440,19 +468,8 @@ http://sourceforge.net/adobe/cmap/wiki/License/
     </div>
   </div>
 </div>
-
 </body>
 <script>
-  $("#loading").css("background","url(../../img/load.gif) no-repeat 10px 50%");
-  var interval = setInterval('loadPdf()', 1000);
-  function loadPdf() {
-    if (PDFViewerApplication.pdfDocument == null) {
-      $('#myModal').modal('show');
-    } else {
-      clearInterval(interval);
-      $('#myModal').remove();
-    }
-  }
   $(function(){
     //获取父页面打印权限显示打印按钮
     var print = parent.$("#print").val();
@@ -460,24 +477,6 @@ http://sourceforge.net/adobe/cmap/wiki/License/
       $("#print").show();
     }
   })
-  //屏蔽鼠标右键
-  document.oncontextmenu = function(e) {
-    var e = e || window.event;
-    e.returnValue = false;
-    return false;
-  }
-  //禁止快捷键打印
-  function disabledPrint(){
-    if(event.keyCode==80 && event.ctrlKey){
-      event.keyCode=0;
-      event.returnValue=false;
-    }
-    if (event.ctrlKey && event.keyCode == 83) {
-      event.preventDefault();
-      event.returnValue = false;
-      return false;
-    }
-  }
 </script>
 </html>
 

src/main/webapp/static/pdfjs/web/viewer1.js

@@ -62,7 +62,8 @@ var CustomStyle = (function CustomStyleClosure() {
     var prefixes = ['ms', 'Moz', 'Webkit', 'O'];
     var _cache = {};
 
-  function CustomStyle() {}
+    function CustomStyle() {
+    }
 
     CustomStyle.getProp = function get(propName, element) {
         // check cache only when no element is given
@@ -423,7 +424,6 @@ var ProgressBar = (function ProgressBarClosure() {
 })();
 
 
-
 var DEFAULT_PREFERENCES = {
     showPreviousViewOnLoad: true,
     defaultZoomValue: '',
@@ -581,7 +581,6 @@ var Preferences = {
 };
 
 
-
 Preferences._writeToStorage = function (prefObj) {
     return new Promise(function (resolve) {
         localStorage.setItem('pdfjs.preferences', JSON.stringify(prefObj));
@@ -724,7 +723,6 @@ Preferences._readFromStorage = function (prefObj) {
 })();
 
 
-
 var DownloadManager = (function DownloadManagerClosure() {
 
     function download(blobUrl, filename) {
@@ -763,7 +761,8 @@ var DownloadManager = (function DownloadManagerClosure() {
         }
     }
 
-  function DownloadManager() {}
+    function DownloadManager() {
+    }
 
     DownloadManager.prototype = {
         downloadUrl: function DownloadManager_downloadUrl(url, filename) {
@@ -809,9 +808,6 @@ var DownloadManager = (function DownloadManagerClosure() {
 })();
 
 
-
-
-
 /**
  * View History - This is a utility for saving various view parameters for
  *                recently opened files.
@@ -859,7 +855,6 @@ var ViewHistory = (function ViewHistoryClosure() {
                 var databaseStr = JSON.stringify(this.database);
 
 
-
                 localStorage.setItem('database', databaseStr);
                 resolve();
             }.bind(this));
@@ -1191,6 +1186,7 @@ var PDFFindController = (function PDFFindControllerClosure() {
             }
 
             var self = this;
+
             function extractPageText(pageIndex) {
                 self.pdfViewer.getPageTextContent(pageIndex).then(
                     function textContentResolved(textContent) {
@@ -1211,6 +1207,7 @@ var PDFFindController = (function PDFFindControllerClosure() {
                     }
                 );
             }
+
             extractPageText(0);
         },
 
@@ -1532,6 +1529,7 @@ var PDFHistory = {
             // since 'beforeunload' prevents Firefox from caching the document.
             window.removeEventListener('beforeunload', pdfHistoryBeforeUnload, false);
         }
+
         window.addEventListener('beforeunload', pdfHistoryBeforeUnload, false);
 
         window.addEventListener('pageshow', function pdfHistoryPageShow(evt) {
@@ -1815,8 +1813,10 @@ var SecondaryToolbar = {
             {element: this.toggleButton, handler: this.toggle},
             // All items within the secondary toolbar
             // (except for toggleHandTool, hand_tool.js is responsible for it):
-      { element: this.presentationModeButton,
-        handler: this.presentationModeClick },
+            {
+                element: this.presentationModeButton,
+                handler: this.presentationModeClick
+            },
             {element: this.openFile, handler: this.openFileClick},
             {element: this.print, handler: this.printClick},
             {element: this.download, handler: this.downloadClick},
@@ -1825,8 +1825,10 @@ var SecondaryToolbar = {
             {element: this.lastPage, handler: this.lastPageClick},
             {element: this.pageRotateCw, handler: this.pageRotateCwClick},
             {element: this.pageRotateCcw, handler: this.pageRotateCcwClick},
-      { element: this.documentPropertiesButton,
-        handler: this.documentPropertiesClick }
+            {
+                element: this.documentPropertiesButton,
+                handler: this.documentPropertiesClick
+            }
         ];
 
         for (var item in elements) {
@@ -1840,6 +1842,36 @@ var SecondaryToolbar = {
     // Event handling functions.
     presentationModeClick: function secondaryToolbarPresentationModeClick(evt) {
         PDFViewerApplication.requestPresentationMode();
+        $("#viewer").append("<div id='fullScreamBtn' class='fullScreamBtn'><i class='fa fa-search-plus fa-lg' id='plus' title='放大(快捷键ctrl+↑)'></i><i class='fa fa-search-minus fa-lg' id='minus' title='缩小(快捷键ctrl+↓)'></i><i class='fa fa-lg fa-undo' id='undo' title='逆时针旋转(快捷键ctrl+→)'></i><i class='fa fa-repeat fa-lg' id='repeat' title='顺时针旋转(快捷键ctrl+←)'></i><i class='fa fa-hand-paper-o fa-lg' id='hand-paper' title='启用手形工具(键盘按下Tab键)'></i></div>")
+        //阻止外层div鼠标点击冒泡事件
+        document.getElementById("fullScreamBtn").addEventListener("mousedown", function (evt) {
+            evt.stopPropagation();
+        }, false);
+        //图片放大
+        document.getElementById("plus").addEventListener("click",
+    function () {
+            PDFViewerApplication.zoomIn();
+        },false);
+        //图片缩小
+        document.getElementById("minus").addEventListener("click",
+    function () {
+            PDFViewerApplication.zoomOut();
+        },false);
+        //顺时针旋转
+        document.getElementById("repeat").addEventListener("click",
+    function () {
+            PDFViewerApplication.rotatePages(90);
+        },false);
+        //逆时针旋转
+        document.getElementById("undo").addEventListener("click",
+            function () {
+                PDFViewerApplication.rotatePages(-90);
+            },false);
+        //启用手型选取
+        document.getElementById("hand-paper").addEventListener("click",
+    function () {
+            HandTool.toggle();
+        },false);
         this.close();
     },
 
@@ -2357,6 +2389,7 @@ var GrabToPan = (function GrabToPanClosure() {
         var overlay = this.overlay = document.createElement('div');
         overlay.className = 'grab-to-pan-grabbing';
     }
+
     GrabToPan.prototype = {
         /**
          * Class name of element which can be grabbed
@@ -2560,7 +2593,8 @@ var HandTool = {
                     if (value) {
                         this.handTool.activate();
                     }
-        }.bind(this), function rejected(reason) {});
+                }.bind(this), function rejected(reason) {
+                });
             }.bind(this));
 
             window.addEventListener('presentationmodechanged', function (evt) {
@@ -2624,10 +2658,12 @@ var OverlayManager = {
             } else if (this.overlays[name]) {
                 throw new Error('The overlay is already registered.');
             }
-      this.overlays[name] = { element: element,
+            this.overlays[name] = {
+                element: element,
                 container: container,
                 callerCloseMethod: (callerCloseMethod || null),
-                              canForceClose: (canForceClose || false) };
+                canForceClose: (canForceClose || false)
+            };
             resolve();
         }.bind(this));
     },
@@ -3528,6 +3564,7 @@ var PDFPageView = (function PDFPageViewClosure() {
             // Rendering area
 
             var self = this;
+
             function pageViewDrawCallback(error) {
                 // The renderTask may have been replaced by a new one, so only remove
                 // the reference to the renderTask if it matches the one that is
@@ -3620,8 +3657,7 @@ var PDFPageView = (function PDFPageViewClosure() {
 
             if (this.annotationsLayerFactory) {
                 if (!this.annotationLayer) {
-          this.annotationLayer = this.annotationsLayerFactory.
-            createAnnotationsLayerBuilder(div, this.pdfPage);
+                    this.annotationLayer = this.annotationsLayerFactory.createAnnotationsLayerBuilder(div, this.pdfPage);
                 }
                 this.annotationLayer.setupAnnotations(this.viewport);
             }
@@ -4085,7 +4121,9 @@ var TextLayerBuilder = (function TextLayerBuilderClosure() {
  * @constructor
  * @implements IPDFTextLayerFactory
  */
-function DefaultTextLayerFactory() {}
+function DefaultTextLayerFactory() {
+}
+
 DefaultTextLayerFactory.prototype = {
     /**
      * @param {HTMLDivElement} textLayerDiv
@@ -4125,6 +4163,7 @@ var AnnotationsLayerBuilder = (function AnnotationsLayerBuilderClosure() {
 
         this.div = null;
     }
+
     AnnotationsLayerBuilder.prototype =
         /** @lends AnnotationsLayerBuilder.prototype */ {
 
@@ -4246,7 +4285,9 @@ var AnnotationsLayerBuilder = (function AnnotationsLayerBuilderClosure() {
  * @constructor
  * @implements IPDFAnnotationsLayerFactory
  */
-function DefaultAnnotationsLayerFactory() {}
+function DefaultAnnotationsLayerFactory() {
+}
+
 DefaultAnnotationsLayerFactory.prototype = {
     /**
      * @param {HTMLDivElement} pageDiv
@@ -4966,6 +5007,7 @@ var SimpleLinkService = (function SimpleLinkServiceClosure() {
     function SimpleLinkService(pdfViewer) {
         this.pdfViewer = pdfViewer;
     }
+
     SimpleLinkService.prototype = {
         /**
          * @returns {number}
@@ -4982,7 +5024,8 @@ var SimpleLinkService = (function SimpleLinkServiceClosure() {
         /**
          * @param dest - The PDF destination object.
          */
-    navigateTo: function (dest) {},
+        navigateTo: function (dest) {
+        },
         /**
          * @param dest - The PDF destination object.
          * @returns {string} The hyperlink to the PDF object.
@@ -5000,11 +5043,13 @@ var SimpleLinkService = (function SimpleLinkServiceClosure() {
         /**
          * @param {string} hash
          */
-    setHash: function (hash) {},
+        setHash: function (hash) {
+        },
         /**
          * @param {string} action
          */
-    executeNamedAction: function (action) {},
+        executeNamedAction: function (action) {
+        },
     };
     return SimpleLinkService;
 })();
@@ -5214,6 +5259,7 @@ var PDFThumbnailView = (function PDFThumbnailViewClosure() {
             });
 
             var self = this;
+
             function thumbnailDrawCallback(error) {
                 // The renderTask may have been replaced by a new one, so only remove
                 // the reference to the renderTask if it matches the one that is
@@ -5802,14 +5848,22 @@ var PDFViewerApplication = {
                 viewer: viewer,
                 pdfThumbnailViewer: this.pdfThumbnailViewer,
                 contextMenuItems: [
-          { element: document.getElementById('contextFirstPage'),
-            handler: toolbar.firstPageClick.bind(toolbar) },
-          { element: document.getElementById('contextLastPage'),
-            handler: toolbar.lastPageClick.bind(toolbar) },
-          { element: document.getElementById('contextPageRotateCw'),
-            handler: toolbar.pageRotateCwClick.bind(toolbar) },
-          { element: document.getElementById('contextPageRotateCcw'),
-            handler: toolbar.pageRotateCcwClick.bind(toolbar) }
+                    {
+                        element: document.getElementById('contextFirstPage'),
+                        handler: toolbar.firstPageClick.bind(toolbar)
+                    },
+                    {
+                        element: document.getElementById('contextLastPage'),
+                        handler: toolbar.lastPageClick.bind(toolbar)
+                    },
+                    {
+                        element: document.getElementById('contextPageRotateCw'),
+                        handler: toolbar.pageRotateCwClick.bind(toolbar)
+                    },
+                    {
+                        element: document.getElementById('contextPageRotateCcw'),
+                        handler: toolbar.pageRotateCcwClick.bind(toolbar)
+                    }
                 ]
             });
         }
@@ -5864,7 +5918,8 @@ var PDFViewerApplication = {
                 PDFJS.useOnlyCssZoom = value;
             })
             // TODO move more preferences and other async stuff here
-    ]).catch(function (reason) { });
+        ]).catch(function (reason) {
+        });
 
         return initializedPromise.then(function () {
             PDFViewerApplication.initialized = true;
@@ -6483,7 +6538,6 @@ var PDFViewerApplication = {
             self.metadata = metadata;
 
 
-
             var pdfTitle;
             if (metadata && metadata.has('dc:title')) {
                 var title = metadata.get('dc:title');
@@ -6947,8 +7001,7 @@ function webViewerInitialized() {
 
     if (!PDFViewerApplication.supportsFullscreen) {
         //document.getElementById('presentationMode').classList.add('hidden');
-    document.getElementById('secondaryPresentationMode').
-      classList.add('hidden');
+        document.getElementById('secondaryPresentationMode').classList.add('hidden');
     }
 
     /*  if (PDFViewerApplication.supportsIntegratedFind) {
@@ -7085,8 +7138,7 @@ document.addEventListener('pagerendered', function (e) {
     var pageView = PDFViewerApplication.pdfViewer.getPageView(pageIndex);
 
     if (PDFViewerApplication.sidebarOpen) {
-    var thumbnailView = PDFViewerApplication.pdfThumbnailViewer.
-                        getThumbnail(pageIndex);
+        var thumbnailView = PDFViewerApplication.pdfThumbnailViewer.getThumbnail(pageIndex);
         thumbnailView.setImage(pageView);
     }
 
@@ -7211,8 +7263,7 @@ window.addEventListener('change', function webViewerChange(evt) {
 
     // URL does not reflect proper document location - hiding some icons.
     document.getElementById('viewBookmark').setAttribute('hidden', 'true');
-  document.getElementById('secondaryViewBookmark').
-    setAttribute('hidden', 'true');
+    document.getElementById('secondaryViewBookmark').setAttribute('hidden', 'true');
     document.getElementById('download').setAttribute('hidden', 'true');
     document.getElementById('secondaryDownload').setAttribute('hidden', 'true');
 }, true);
@@ -7332,7 +7383,7 @@ function handleMouseWheel(evt) {
     var direction = (ticks < 0) ? 'zoomOut' : 'zoomIn';
 
     if (PDFViewerApplication.pdfViewer.isInPresentationMode) {
-    evt.preventDefault();
+        //evt.preventDefault();
         PDFViewerApplication.scrollPresentationMode(ticks *
             MOUSE_WHEEL_DELTA_FACTOR);
     } else if (evt.ctrlKey || evt.metaKey) {
@@ -7609,4 +7660,7 @@ window.addEventListener('afterprint', function afterPrint(evt) {
         });
 })();
 
+function fullScreamBtn() {
+    PDFViewerApplication.rotatePages(-90);
+}