javascript解决pdf阅读器的书签

最近有大量的资料需要阅读，常常用到Adobe Reader8.0阅览器。不过最让人头疼的就是这个阅览器没有添加书签的功能。如果遇到上百页的文本，自己下次阅读的时候还需要自己再重复寻找上次的阅读终点，那么有没有在Adobe Reader8.0阅览器中添加书签的方法呢？最近通过摸索和网络求助，找到了一个简单快捷的方法在Adobe Reader8.0阅览器中添加书签。

具体步骤如下：

       第一步，下载一个“PDF支持书签的修改程序源文件”。地址为“http://download.csdn.net/source/362724”(如果你能链接则将全部复制到地址栏回车即可)。

       第二步，将下载的文件重命名为“bookmark_page.js”.

       第三步，将bookmark_page.js文件复制到“计算机/C:/Program Files/Adobe/Reader8.0/Reader/Javascripts/”（我的计算机是Vista系统，如果是XP系统的话将文件复制到 C:/Program Files/Adobe/Reader8.0/Reader/Javascripts/即可）。

       第四步，重新启动Reader8.0,你会在视图选项的下拉菜单中看到有设置本页为书签、转到指定书签、删除一个书签和删除所以书签选项，这样你就可以添加书签了！



注:如果下载不了,可以用下载代码复制另存为bookmark_page.js即可.

// bookmark_page.js, ver. 1.0
// visit: www.pdfhacks.com/bookmark_page/
// edit:cjs 2008-02-17
// 1 修改为中文标签
// 2 设置书签时可以自动获取当前的书名
// 3 自动获取当前所在的页码与总页数,方便查阅
// 4 实现更多功能可以参看Adobe Reader的SDK


// use this delimiter for serializing our array
var bp_delim= '%#%#';

function SaveData( data ) {
  // data is an array of arrays that needs
  // to be serialized and stored into a persistent
  // global string
  var ds= '';
  for( ii= 0; ii< data.length; ++ii ) {
    for( jj= 0; jj< 3; ++jj ) {
      if( ii!= 0 || jj!= 0 )
        ds+= bp_delim;
      ds+= data[ii][jj];
    }
  }
  global.pdf_hacks_js_bookmarks= ds;
  global.setPersistent( "pdf_hacks_js_bookmarks", true );
}

function GetData() {
  // reverse of SaveData; return an array of arrays
  if( global.pdf_hacks_js_bookmarks== null ) {
    return new Array(0);
  }

  var flat= global.pdf_hacks_js_bookmarks.split( bp_delim );
  var data= new Array();
  for( ii= 0; ii< flat.length; ) {
    var record= new Array();
    for( jj= 0; jj< 3 && ii< flat.length; ++ii, ++jj ) {
      record.push( flat[ii] );
    }
    if( record.length== 3 ) {
      data.push( record );
    }
  }
  return data;
}

//Get Current Date
function DateNow(){
   var d, s ;
   d = new Date();
   s = d.getFullYear()+"/";
   s += (d.getMonth() + 1) + "/";
   s += d.getDate() ;
   /*
   s += d.getHours() + ":";
   s += d.getMinutes() + ":";
   s += d.getSeconds() ;
   */
   return(s);
}


function AddBookmark() {
  // query the user for a name, and then combine it with
  // the current PDF page to create a record; store this record
  var thisfilename=this.documentFileName;
  thisfilename=thisfilename.substr(0,thisfilename.lastIndexOf("."));
  var numPlugInss=this.pageNum+1;
  var currentdate=DateNow();
  var label=
    app.response( "书签名称,可以修改以便于记忆:",
                  "书签名称",
                  "《"+thisfilename+"》第 "+numPlugInss+" 页/共 "+this.numPages+" 页  "+currentdate,
                  false );
  if( label!= null ) {
    var record= new Array(3);
    record[0]= label;
    record[1]= this.path;
    record[2]= this.pageNum;
    data= GetData();
    data.push( record );
    SaveData( data );
  }
}

function ShowBookmarks() {
  // show a pop-up menu; this seems to only work when
  // a PDF is alreay in the viewer;
  var data= GetData();
  var items= '';
  for( ii= 0; ii< data.length; ++ii ) {
    if( ii!= 0 )
      items+= ', ';
    items+= '"'+ ii+ ': '+ data[ii][0]+ '"';
  }
  // assemble the command and the execute it with eval()
  var command= 'app.popUpMenu( '+ items+ ' );';
  var selection= eval( command );
  if( selection== null ) {
    return; // exit
  }

  // the user made a selection; parse out its index and use it
  // to access the bookmark record
  var index= 0;
  // toString() converts the String object to a string literal
  // eval() converts the string literal to a number
  index= eval( selection.substring( 0, selection.indexOf(':') ).toString() );
  if( index< data.length ) {
    try {
      // the document must be 'disclosed' for us to have any access
      // to its properties, so we use these FirstPage NextPage calls
      //
      app.openDoc( data[index][1] );
      app.execMenuItem( "FirstPage" );
      for( ii= 0; ii< data[index][2]; ++ii ) {
        app.execMenuItem( "NextPage" );
      }
    }
    catch( ee ) {
      var response=
        app.alert("打开书签错误. 是否删除本书签?", 2, 2,"删除书签");
      if( response== 4 && index< data.length ) {
        data.splice( index, 1 );
        SaveData( data );
      }
    }
  }
}

function DropBookmark() {
  // modelled after ShowBookmarks()
  var data= GetData();
  var items= '';
  for( ii= 0; ii< data.length; ++ii ) {
    if( ii!= 0 )
      items+= ', ';
    items+= '"'+ ii+ ': '+ data[ii][0]+ '"';
  }
  var command= 'app.popUpMenu( '+ items+ ' );';
  var selection= eval( command );
  if( selection== null ) {
    return; // exit
  }

  var index= 0;
  index= eval( selection.substring( 0, selection.indexOf(':') ).toString() );
  if( index< data.length ) {
    data.splice( index, 1 );
    SaveData( data );
  }
}

function ClearBookmarks() {
  if( app.alert("确认要清除所有的书签吗?", 2, 2,"删除书签" )== 4 ) {
    SaveData( new Array(0) );
  }
}

app.addMenuItem( {
cName: "-",              // menu divider
cParent: "View",         // append to the View menu
cExec: "void(0);" } );

app.addMenuItem( {
cName: "设置本页为书签(&B)",
cParent: "View",
cExec: "AddBookmark();",
cEnable: "event.rc= (event.target != null);" } );

app.addMenuItem( {
cName: "转到指定书签(&T)",
cParent: "View",
cExec: "ShowBookmarks();",
cEnable: "event.rc= (event.target != null);" } );
//cEnable: "event.rc= true;" } );

app.addMenuItem( {
cName: "删除一个书签(&D)",
cParent: "View",
cExec: "DropBookmark();",
cEnable: "event.rc= (event.target != null);" } );

app.addMenuItem( {
cName: "清除所有书签(&C)",
cParent: "View",
cExec: "ClearBookmarks();",
cEnable: "event.rc= true;" } );