<?php
require('../INCLUDE/fpdf181/fpdf.php');

class PDF_Bookmark extends FPDF
{
 var $outlines=array();
 var $OutlineRoot;

 function Bookmark($txt, $level=0, $y=0)
 {
	if($y==-1)
		$y=$this->GetY();
	$this->outlines[]=array('t'=>$txt, 'l'=>$level, 'y'=>($this->h-$y)*$this->k, 'p'=>$this->PageNo());
 }

 function BookmarkUTF8($txt, $level=0, $y=0)
 {
	$this->Bookmark($this->_UTF8toUTF16($txt),$level,$y);
 }

 function _putbookmarks()
 {
	$nb=count($this->outlines);
	if($nb==0)
		return;
	$lru=array();
	$level=0;
	foreach($this->outlines as $i=>$o)
	{
		if($o['l']>0)
		{
			$parent=$lru[$o['l']-1];
			//Set parent and last pointers
			$this->outlines[$i]['parent']=$parent;
			$this->outlines[$parent]['last']=$i;
			if($o['l']>$level)
			{
				//Level increasing: set first pointer
				$this->outlines[$parent]['first']=$i;
			}
		}
		else
			$this->outlines[$i]['parent']=$nb;
		if($o['l']<=$level and $i>0)
		{
			//Set prev and next pointers
			$prev=$lru[$o['l']];
			$this->outlines[$prev]['next']=$i;
			$this->outlines[$i]['prev']=$prev;
		}
		$lru[$o['l']]=$i;
		$level=$o['l'];
	}
	//Outline items
	$n=$this->n+1;
	foreach($this->outlines as $i=>$o)
	{
		$this->_newobj();
		$this->_out('<</Title '.$this->_textstring($o['t']));
		$this->_out('/Parent '.($n+$o['parent']).' 0 R');
		if(isset($o['prev']))
			$this->_out('/Prev '.($n+$o['prev']).' 0 R');
		if(isset($o['next']))
			$this->_out('/Next '.($n+$o['next']).' 0 R');
		if(isset($o['first']))
			$this->_out('/First '.($n+$o['first']).' 0 R');
		if(isset($o['last']))
			$this->_out('/Last '.($n+$o['last']).' 0 R');
		$this->_out(sprintf('/Dest [%d 0 R /XYZ 0 %.2F null]',1+2*$o['p'],$o['y']));
		$this->_out('/Count 0>>');
		$this->_out('endobj');
	}
	//Outline root
	$this->_newobj();
	$this->OutlineRoot=$this->n;
	$this->_out('<</Type /Outlines /First '.$n.' 0 R');
	$this->_out('/Last '.($n+$lru[0]).' 0 R>>');
	$this->_out('endobj');
 }

 function _putresources()
 {
    parent::_putresources();
    $this->_putbookmarks();
 }

 function _putcatalog()
 {
	parent::_putcatalog();
	if(count($this->outlines)>0)
	{
		$this->_out('/Outlines '.$this->OutlineRoot.' 0 R');
		$this->_out('/PageMode /UseOutlines');
	}
 }
}
?>
