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<?php
/**
* PHPPowerPoint
*
* Copyright (c) 2009 - 2010 PHPPowerPoint
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category PHPPowerPoint
* @package PHPPowerPoint_Shared
* @copyright Copyright (c) 2009 - 2010 PHPPowerPoint (http://www.codeplex.com/PHPPowerPoint)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 0.1.0, 2009-04-27
*/
/** Register new zip wrapper */
PHPPowerPoint_Shared_ZipStreamWrapper::register();
/**
* PHPPowerPoint_Shared_ZipStreamWrapper
*
* @category PHPPowerPoint
* @package PHPPowerPoint_Shared
* @copyright Copyright (c) 2009 - 2010 PHPPowerPoint (http://www.codeplex.com/PHPPowerPoint)
*/
class PHPPowerPoint_Shared_ZipStreamWrapper {
/**
* Internal ZipAcrhive
*
* @var ZipAcrhive
*/
private $_archive;
/**
* Filename in ZipAcrhive
*
* @var string
*/
private $_fileNameInArchive = '';
/**
* Position in file
*
* @var int
*/
private $_position = 0;
/**
* Data
*
* @var mixed
*/
private $_data = '';
/**
* Register wrapper
*/
public static function register() {
@stream_wrapper_unregister("zip");
@stream_wrapper_register("zip", __CLASS__);
}
/**
* Open stream
*/
public function stream_open($path, $mode, $options, &$opened_path) {
// Check for mode
if ($mode{0} != 'r') {
throw new Exception('Mode ' . $mode . ' is not supported. Only read mode is supported.');
}
// Parse URL
$url = @parse_url($path);
// Fix URL
if (!is_array($url)) {
$url['host'] = substr($path, strlen('zip://'));
$url['path'] = '';
}
if (strpos($url['host'], '#') !== false) {
if (!isset($url['fragment'])) {
$url['fragment'] = substr($url['host'], strpos($url['host'], '#') + 1) . $url['path'];
$url['host'] = substr($url['host'], 0, strpos($url['host'], '#'));
unset($url['path']);
}
} else {
$url['host'] = $url['host'] . $url['path'];
unset($url['path']);
}
// Open archive
$this->_archive = new ZipArchive();
$this->_archive->open($url['host']);
$this->_fileNameInArchive = $url['fragment'];
$this->_position = 0;
$this->_data = $this->_archive->getFromName( $this->_fileNameInArchive );
return true;
}
/**
* Stat stream
*/
public function stream_stat() {
return $this->_archive->statName( $this->_fileNameInArchive );
}
/**
* Read stream
*/
function stream_read($count) {
$ret = substr($this->_data, $this->_position, $count);
$this->_position += strlen($ret);
return $ret;
}
/**
* Tell stream
*/
public function stream_tell() {
return $this->_position;
}
/**
* EOF stream
*/
public function stream_eof() {
return $this->_position >= strlen($this->_data);
}
/**
* Seek stream
*/
public function stream_seek($offset, $whence) {
switch ($whence) {
case SEEK_SET:
if ($offset < strlen($this->_data) && $offset >= 0) {
$this->_position = $offset;
return true;
} else {
return false;
}
break;
case SEEK_CUR:
if ($offset >= 0) {
$this->_position += $offset;
return true;
} else {
return false;
}
break;
case SEEK_END:
if (strlen($this->_data) + $offset >= 0) {
$this->_position = strlen($this->_data) + $offset;
return true;
} else {
return false;
}
break;
default:
return false;
}
}
}
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