<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
// +----------------------------------------------------------------------+
// | PHP Version 4                                                        |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2002 The PHP Group                                |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.02 of the PHP license,      |
// | that is bundled with this package in the file LICENSE, and is        |
// | available at through the world-wide-web at                           |
// | http://www.php.net/license/2_02.txt.                                 |
// | If you did not receive a copy of the PHP license and are unable to   |
// | obtain it through the world-wide-web, please send a note to          |
// | license@php.net so we can mail you a copy immediately.               |
// +----------------------------------------------------------------------+
// | Author: Xavier Noguer <xnoguer@php.net>                              |
// | Based on OLE::Storage_Lite by Kawai, Takanori                        |
// +----------------------------------------------------------------------+
//
// $Id: PPS.php,v 1.7 2007/02/13 21:00:42 schmidt Exp $


/**
* Class for creating PPS's for OLE containers
*
* @author  Taha Sayyad <info@trustotech.com>
* @category PHPExcel
* @package  PHPExcel_Shared_OLE
*/
class PHPExcel_Shared_OLE_PPS
{
	/**
	* The PPS index
	* @var integer
	*/
	public $No;

	/**
	* The PPS name (in Unicode)
	* @var string
	*/
	public $Name;

	/**
	* The PPS type. Dir, Root or File
	* @var integer
	*/
	public $Type;

	/**
	* The index of the previous PPS
	* @var integer
	*/
	public $PrevPps;

	/**
	* The index of the next PPS
	* @var integer
	*/
	public $NextPps;

	/**
	* The index of it's first child if this is a Dir or Root PPS
	* @var integer
	*/
	public $DirPps;

	/**
	* A timestamp
	* @var integer
	*/
	public $Time1st;

	/**
	* A timestamp
	* @var integer
	*/
	public $Time2nd;

	/**
	* Starting block (small or big) for this PPS's data  inside the container
	* @var integer
	*/
	public $_StartBlock;

	/**
	* The size of the PPS's data (in bytes)
	* @var integer
	*/
	public $Size;

	/**
	* The PPS's data (only used if it's not using a temporary file)
	* @var string
	*/
	public $_data;

	/**
	* Array of child PPS's (only used by Root and Dir PPS's)
	* @var array
	*/
	public $children = array();

	/**
	* Pointer to OLE container
	* @var OLE
	*/
	public $ole;

	/**
	* The constructor
	*
	* @access public
	* @param integer $No   The PPS index
	* @param string  $name The PPS name
	* @param integer $type The PPS type. Dir, Root or File
	* @param integer $prev The index of the previous PPS
	* @param integer $next The index of the next PPS
	* @param integer $dir  The index of it's first child if this is a Dir or Root PPS
	* @param integer $time_1st A timestamp
	* @param integer $time_2nd A timestamp
	* @param string  $data  The (usually binary) source data of the PPS
	* @param array   $children Array containing children PPS for this PPS
	*/
	public function __construct($No, $name, $type, $prev, $next, $dir, $time_1st, $time_2nd, $data, $children)
	{
		$this->No      = $No;
		$this->Name    = $name;
		$this->Type    = $type;
		$this->PrevPps = $prev;
		$this->NextPps = $next;
		$this->DirPps  = $dir;
		$this->Time1st = $time_1st;
		$this->Time2nd = $time_2nd;
		$this->_data      = $data;
		$this->children   = $children;
		if ($data != '') {
			$this->Size = strlen($data);
		} else {
			$this->Size = 0;
		}
	}

	/**
	* Returns the amount of data saved for this PPS
	*
	* @access public
	* @return integer The amount of data (in bytes)
	*/
	public function _DataLen()
	{
		if (!isset($this->_data)) {
			return 0;
		}
		//if (isset($this->_PPS_FILE)) {
		//	fseek($this->_PPS_FILE, 0);
		//	$stats = fstat($this->_PPS_FILE);
		//	return $stats[7];
		//} else {
			return strlen($this->_data);
		//}
	}

	/**
	* Returns a string with the PPS's WK (What is a WK?)
	*
	* @access public
	* @return string The binary string
	*/
	public function _getPpsWk()
	{
		$ret = str_pad($this->Name,64,"\x00");

		$ret .= pack("v", strlen($this->Name) + 2)  // 66
			  . pack("c", $this->Type)              // 67
			  . pack("c", 0x00) //UK                // 68
			  . pack("V", $this->PrevPps) //Prev    // 72
			  . pack("V", $this->NextPps) //Next    // 76
			  . pack("V", $this->DirPps)  //Dir     // 80
			  . "\x00\x09\x02\x00"                  // 84
			  . "\x00\x00\x00\x00"                  // 88
			  . "\xc0\x00\x00\x00"                  // 92
			  . "\x00\x00\x00\x46"                  // 96 // Seems to be ok only for Root
			  . "\x00\x00\x00\x00"                  // 100
			  . PHPExcel_Shared_OLE::LocalDate2OLE($this->Time1st)       // 108
			  . PHPExcel_Shared_OLE::LocalDate2OLE($this->Time2nd)       // 116
			  . pack("V", isset($this->_StartBlock)?
						$this->_StartBlock:0)        // 120
			  . pack("V", $this->Size)               // 124
			  . pack("V", 0);                        // 128
		return $ret;
	}

	/**
	* Updates index and pointers to previous, next and children PPS's for this
	* PPS. I don't think it'll work with Dir PPS's.
	*
	* @access public
	* @param array &$raList Reference to the array of PPS's for the whole OLE
	*                          container
	* @return integer          The index for this PPS
	*/
	public static function _savePpsSetPnt(&$raList, $to_save, $depth = 0)
	{
		if ( !is_array($to_save) || (empty($to_save)) ) {
			return 0xFFFFFFFF;
		} elseif( count($to_save) == 1 ) {
			$cnt = count($raList);
			// If the first entry, it's the root... Don't clone it!
			$raList[$cnt] = ( $depth == 0 ) ? $to_save[0] : clone $to_save[0];
			$raList[$cnt]->No = $cnt;
			$raList[$cnt]->PrevPps = 0xFFFFFFFF;
			$raList[$cnt]->NextPps = 0xFFFFFFFF;
			$raList[$cnt]->DirPps  = self::_savePpsSetPnt($raList, @$raList[$cnt]->children, $depth++);
		} else {
			$iPos  = floor(count($to_save) / 2);
			$aPrev = array_slice($to_save, 0, $iPos);
			$aNext = array_slice($to_save, $iPos + 1);
			$cnt   = count($raList);
			// If the first entry, it's the root... Don't clone it!
			$raList[$cnt] = ( $depth == 0 ) ? $to_save[$iPos] : clone $to_save[$iPos];
			$raList[$cnt]->No = $cnt;
			$raList[$cnt]->PrevPps = self::_savePpsSetPnt($raList, $aPrev, $depth++);
			$raList[$cnt]->NextPps = self::_savePpsSetPnt($raList, $aNext, $depth++);
			$raList[$cnt]->DirPps  = self::_savePpsSetPnt($raList, @$raList[$cnt]->children, $depth++);

		}
		return $cnt;
	}
}
