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<?php /** * PHPExcel * * Copyright (c) 2006 - 2014 PHPExcel * * 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 PHPExcel * @package PHPExcel_CachedObjectStorage * @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel) * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL * @version 1.8.0, 2014-03-02 */ /** * PHPExcel_CachedObjectStorage_Igbinary * * @category PHPExcel * @package PHPExcel_CachedObjectStorage * @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel) */ class PHPExcel_CachedObjectStorage_Igbinary extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache { /** * Store cell data in cache for the current cell object if it's "dirty", * and the 'nullify' the current cell object * * @return void * @throws PHPExcel_Exception */ protected function _storeData() { if ($this->_currentCellIsDirty && !empty($this->_currentObjectID)) { $this->_currentObject->detach(); $this->_cellCache[$this->_currentObjectID] = igbinary_serialize($this->_currentObject); $this->_currentCellIsDirty = false; } $this->_currentObjectID = $this->_currentObject = null; } // function _storeData() /** * Add or Update a cell in cache identified by coordinate address * * @param string $pCoord Coordinate address of the cell to update * @param PHPExcel_Cell $cell Cell to update * @return void * @throws PHPExcel_Exception */ public function addCacheData($pCoord, PHPExcel_Cell $cell) { if (($pCoord !== $this->_currentObjectID) && ($this->_currentObjectID !== null)) { $this->_storeData(); } $this->_currentObjectID = $pCoord; $this->_currentObject = $cell; $this->_currentCellIsDirty = true; return $cell; } // function addCacheData() /** * Get cell at a specific coordinate * * @param string $pCoord Coordinate of the cell * @throws PHPExcel_Exception * @return PHPExcel_Cell Cell that was found, or null if not found */ public function getCacheData($pCoord) { if ($pCoord === $this->_currentObjectID) { return $this->_currentObject; } $this->_storeData(); // Check if the entry that has been requested actually exists if (!isset($this->_cellCache[$pCoord])) { // Return null if requested entry doesn't exist in cache return null; } // Set current entry to the requested entry $this->_currentObjectID = $pCoord; $this->_currentObject = igbinary_unserialize($this->_cellCache[$pCoord]); // Re-attach this as the cell's parent $this->_currentObject->attach($this); // Return requested entry return $this->_currentObject; } // function getCacheData() /** * Get a list of all cell addresses currently held in cache * * @return array of string */ public function getCellList() { if ($this->_currentObjectID !== null) { $this->_storeData(); } return parent::getCellList(); } /** * Clear the cell collection and disconnect from our parent * * @return void */ public function unsetWorksheetCells() { if(!is_null($this->_currentObject)) { $this->_currentObject->detach(); $this->_currentObject = $this->_currentObjectID = null; } $this->_cellCache = array(); // detach ourself from the worksheet, so that it can then delete this object successfully $this->_parent = null; } // function unsetWorksheetCells() /** * Identify whether the caching method is currently available * Some methods are dependent on the availability of certain extensions being enabled in the PHP build * * @return boolean */ public static function cacheMethodIsAvailable() { if (!function_exists('igbinary_serialize')) { return false; } return true; } }