给Adobe Reader添加书签功能

Adobe Acrobat Professional和Adobe Reader都是Adobe公司的产品。前者用来编辑制作PDF文档，后者只能用来阅读PDF。令人郁闷的是Adobe Reader中虽然有书签这一项显示，却没有添加书签的功能。解决方法一是使用Adobe Acrobat Professional，另一个方法如下：

在http://www.pdfhacks.com/bookmark_page/bookmark_page.js-1.0.zip　上面下载一个javascript脚本文件，把这个文件放到Adobe/Acrobat 7.0/Reader/Javascripts目录下。如果忘记了Adobe的安装目录，可以运行Adobe Reader，然后使用process explorer查看进程对应的可执行文件路径。文件放好后，重新运行Adobe Reader，就可以在“视图”菜单项的下面发现四个新增的条项。这四个新增的条项就是那个javascript文件的效果，它们能够实现书签的功能。这个新增的书签功能自然是不能和Adobe Acrobat Professional中的书签功能相比，但对于阅读文档也足够了。

下面是那个javascript文件的内容：

===================================代码开始================================

// bookmark_page.js, ver. 1.0

// visit: www.pdfhacks.com/bookmark_page/

// 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;

}

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 label=

app.response( "Bookmark Name:",

"Bookmark Name",

"",

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("Error trying to open the requested document./nShould I remove this bookmark?", 2, 2);

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("Are you sure you want to erase all bookmarks?", 2, 2 )== 4 ) {

SaveData( new Array(0) );

}

}

app.addMenuItem( {

cName: "-",              // menu divider

cParent: "View",         // append to the View menu

cExec: "void(0);" } );

app.addMenuItem( {

cName: "Bookmark This Page &5",

cParent: "View",

cExec: "AddBookmark();",

cEnable: "event.rc= (event.target != null);" } );

app.addMenuItem( {

cName: "Go To Bookmark &6",

cParent: "View",

cExec: "ShowBookmarks();",

cEnable: "event.rc= (event.target != null);" } );

app.addMenuItem( {

cName: "Remove a Bookmark",

cParent: "View",

cExec: "DropBookmark();",

cEnable: "event.rc= (event.target != null);" } );

app.addMenuItem( {

cName: "Clear Bookmarks",

cParent: "View",

cExec: "ClearBookmarks();",

cEnable: "event.rc= true;" } );

===================================代码结束================================