mirror of
https://github.com/retailcrm/PHPExcel.git
synced 2024-11-22 13:26:07 +03:00
3886c47ebe
Refactoring of calculation engine for improved performance and memory usage Refactoring of cell object to eliminate data duplication and reduce memory
891 lines
24 KiB
PHP
891 lines
24 KiB
PHP
<?php
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/**
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* PHPExcel
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*
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* Copyright (c) 2006 - 2012 PHPExcel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* @category PHPExcel
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* @package PHPExcel
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* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
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* @version ##VERSION##, ##DATE##
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*/
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/** PHPExcel root directory */
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if (!defined('PHPEXCEL_ROOT')) {
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define('PHPEXCEL_ROOT', dirname(__FILE__) . '/');
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require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
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}
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/**
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* PHPExcel
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*
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* @category PHPExcel
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* @package PHPExcel
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* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
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*/
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class PHPExcel
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{
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/**
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* Unique ID
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*
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* @var string
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*/
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private $_uniqueID;
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/**
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* Document properties
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*
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* @var PHPExcel_DocumentProperties
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*/
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private $_properties;
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/**
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* Document security
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*
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* @var PHPExcel_DocumentSecurity
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*/
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private $_security;
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/**
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* Collection of Worksheet objects
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*
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* @var PHPExcel_Worksheet[]
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*/
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private $_workSheetCollection = array();
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/**
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* Calculation Engine
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*
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* @var PHPExcel_Calculation
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*/
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private $_calculationEngine = NULL;
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/**
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* Active sheet index
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*
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* @var int
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*/
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private $_activeSheetIndex = 0;
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/**
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* Named ranges
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*
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* @var PHPExcel_NamedRange[]
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*/
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private $_namedRanges = array();
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/**
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* CellXf supervisor
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*
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* @var PHPExcel_Style
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*/
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private $_cellXfSupervisor;
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/**
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* CellXf collection
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*
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* @var PHPExcel_Style[]
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*/
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private $_cellXfCollection = array();
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/**
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* CellStyleXf collection
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*
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* @var PHPExcel_Style[]
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*/
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private $_cellStyleXfCollection = array();
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/**
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* Create a new PHPExcel with one Worksheet
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*/
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public function __construct()
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{
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$this->_uniqueID = uniqid();
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$this->_calculationEngine = PHPExcel_Calculation::getInstance($this);
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// Initialise worksheet collection and add one worksheet
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$this->_workSheetCollection = array();
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$this->_workSheetCollection[] = new PHPExcel_Worksheet($this);
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$this->_activeSheetIndex = 0;
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// Create document properties
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$this->_properties = new PHPExcel_DocumentProperties();
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// Create document security
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$this->_security = new PHPExcel_DocumentSecurity();
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// Set named ranges
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$this->_namedRanges = array();
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// Create the cellXf supervisor
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$this->_cellXfSupervisor = new PHPExcel_Style(true);
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$this->_cellXfSupervisor->bindParent($this);
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// Create the default style
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$this->addCellXf(new PHPExcel_Style);
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$this->addCellStyleXf(new PHPExcel_Style);
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}
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/**
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* Code to execute when this worksheet is unset()
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*
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*/
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public function __destruct() {
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PHPExcel_Calculation::unsetInstance($this);
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$this->disconnectWorksheets();
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} // function __destruct()
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/**
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* Disconnect all worksheets from this PHPExcel workbook object,
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* typically so that the PHPExcel object can be unset
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*
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*/
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public function disconnectWorksheets()
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{
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$worksheet = NULL;
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foreach($this->_workSheetCollection as $k => &$worksheet) {
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$worksheet->disconnectCells();
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$this->_workSheetCollection[$k] = null;
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}
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unset($worksheet);
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$this->_workSheetCollection = array();
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}
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/**
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* Return the calculation engine for this worksheet
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*
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* @return PHPExcel_Calculation
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*/
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public function getCalculationEngine()
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{
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return $this->_calculationEngine;
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} // function getCellCacheController()
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/**
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* Get properties
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*
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* @return PHPExcel_DocumentProperties
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*/
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public function getProperties()
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{
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return $this->_properties;
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}
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/**
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* Set properties
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*
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* @param PHPExcel_DocumentProperties $pValue
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*/
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public function setProperties(PHPExcel_DocumentProperties $pValue)
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{
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$this->_properties = $pValue;
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}
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/**
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* Get security
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*
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* @return PHPExcel_DocumentSecurity
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*/
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public function getSecurity()
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{
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return $this->_security;
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}
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/**
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* Set security
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*
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* @param PHPExcel_DocumentSecurity $pValue
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*/
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public function setSecurity(PHPExcel_DocumentSecurity $pValue)
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{
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$this->_security = $pValue;
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}
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/**
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* Get active sheet
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*
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* @return PHPExcel_Worksheet
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*/
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public function getActiveSheet()
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{
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return $this->_workSheetCollection[$this->_activeSheetIndex];
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}
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/**
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* Create sheet and add it to this workbook
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*
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* @param int|null $iSheetIndex Index where sheet should go (0,1,..., or null for last)
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* @return PHPExcel_Worksheet
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* @throws PHPExcel_Exception
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*/
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public function createSheet($iSheetIndex = NULL)
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{
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$newSheet = new PHPExcel_Worksheet($this);
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$this->addSheet($newSheet, $iSheetIndex);
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return $newSheet;
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}
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/**
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* Check if a sheet with a specified name already exists
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*
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* @param string $pSheetName Name of the worksheet to check
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* @return boolean
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*/
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public function sheetNameExists($pSheetName)
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{
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return ($this->getSheetByName($pSheetName) !== NULL);
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}
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/**
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* Add sheet
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*
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* @param PHPExcel_Worksheet $pSheet
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* @param int|null $iSheetIndex Index where sheet should go (0,1,..., or null for last)
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* @return PHPExcel_Worksheet
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* @throws PHPExcel_Exception
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*/
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public function addSheet(PHPExcel_Worksheet $pSheet, $iSheetIndex = NULL)
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{
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if ($this->sheetNameExists($pSheet->getTitle())) {
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throw new PHPExcel_Exception(
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"Workbook already contains a worksheet named '{$pSheet->getTitle()}'. Rename this worksheet first."
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);
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}
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if($iSheetIndex === NULL) {
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if ($this->_activeSheetIndex < 0) {
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$this->_activeSheetIndex = 0;
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}
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$this->_workSheetCollection[] = $pSheet;
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} else {
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// Insert the sheet at the requested index
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array_splice(
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$this->_workSheetCollection,
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$iSheetIndex,
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0,
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array($pSheet)
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);
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// Adjust active sheet index if necessary
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if ($this->_activeSheetIndex >= $iSheetIndex) {
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++$this->_activeSheetIndex;
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}
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}
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return $pSheet;
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}
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/**
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* Remove sheet by index
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*
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* @param int $pIndex Active sheet index
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* @throws PHPExcel_Exception
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*/
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public function removeSheetByIndex($pIndex = 0)
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{
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$numSheets = count($this->_workSheetCollection);
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if ($pIndex > $numSheets - 1) {
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throw new PHPExcel_Exception(
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"You tried to remove a sheet by the out of bounds index: {$pIndex}. The actual number of sheets is {$numSheets}."
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);
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} else {
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array_splice($this->_workSheetCollection, $pIndex, 1);
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}
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// Adjust active sheet index if necessary
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if (($this->_activeSheetIndex >= $pIndex) &&
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($pIndex > count($this->_workSheetCollection) - 1)) {
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--$this->_activeSheetIndex;
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}
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}
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/**
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* Get sheet by index
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*
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* @param int $pIndex Sheet index
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* @return PHPExcel_Worksheet
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* @throws PHPExcel_Exception
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*/
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public function getSheet($pIndex = 0)
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{
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$numSheets = count($this->_workSheetCollection);
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if ($pIndex > $numSheets - 1) {
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throw new PHPExcel_Exception(
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"Your requested sheet index: {$pIndex} is out of bounds. The actual number of sheets is {$numSheets}."
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);
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} else {
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return $this->_workSheetCollection[$pIndex];
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}
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}
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/**
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* Get all sheets
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*
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* @return PHPExcel_Worksheet[]
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*/
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public function getAllSheets()
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{
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return $this->_workSheetCollection;
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}
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/**
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* Get sheet by name
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*
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* @param string $pName Sheet name
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* @return PHPExcel_Worksheet
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*/
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public function getSheetByName($pName = '')
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{
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$worksheetCount = count($this->_workSheetCollection);
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for ($i = 0; $i < $worksheetCount; ++$i) {
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if ($this->_workSheetCollection[$i]->getTitle() === $pName) {
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return $this->_workSheetCollection[$i];
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}
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}
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return NULL;
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}
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/**
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* Get index for sheet
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*
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* @param PHPExcel_Worksheet $pSheet
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* @return Sheet index
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* @throws PHPExcel_Exception
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*/
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public function getIndex(PHPExcel_Worksheet $pSheet)
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{
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foreach ($this->_workSheetCollection as $key => $value) {
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if ($value->getHashCode() == $pSheet->getHashCode()) {
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return $key;
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}
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}
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throw new PHPExcel_Exception("Sheet does not exist.");
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}
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/**
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* Set index for sheet by sheet name.
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*
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* @param string $sheetName Sheet name to modify index for
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* @param int $newIndex New index for the sheet
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* @return New sheet index
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* @throws PHPExcel_Exception
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*/
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public function setIndexByName($sheetName, $newIndex)
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{
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$oldIndex = $this->getIndex($this->getSheetByName($sheetName));
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$pSheet = array_splice(
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$this->_workSheetCollection,
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$oldIndex,
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1
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);
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array_splice(
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$this->_workSheetCollection,
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$newIndex,
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0,
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$pSheet
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);
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return $newIndex;
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}
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/**
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* Get sheet count
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*
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* @return int
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*/
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public function getSheetCount()
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{
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return count($this->_workSheetCollection);
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}
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/**
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* Get active sheet index
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*
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* @return int Active sheet index
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*/
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public function getActiveSheetIndex()
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{
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return $this->_activeSheetIndex;
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}
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/**
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* Set active sheet index
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*
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* @param int $pIndex Active sheet index
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* @throws PHPExcel_Exception
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* @return PHPExcel_Worksheet
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*/
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public function setActiveSheetIndex($pIndex = 0)
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{
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$numSheets = count($this->_workSheetCollection);
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if ($pIndex > $numSheets - 1) {
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throw new PHPExcel_Exception(
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"You tried to set a sheet active by the out of bounds index: {$pIndex}. The actual number of sheets is {$numSheets}."
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);
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} else {
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$this->_activeSheetIndex = $pIndex;
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}
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return $this->getActiveSheet();
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}
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/**
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* Set active sheet index by name
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*
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* @param string $pValue Sheet title
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* @return PHPExcel_Worksheet
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* @throws PHPExcel_Exception
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*/
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public function setActiveSheetIndexByName($pValue = '')
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{
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if (($worksheet = $this->getSheetByName($pValue)) instanceof PHPExcel_Worksheet) {
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$this->setActiveSheetIndex($this->getIndex($worksheet));
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return $worksheet;
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}
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throw new PHPExcel_Exception('Workbook does not contain sheet:' . $pValue);
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}
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/**
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* Get sheet names
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*
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* @return string[]
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*/
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public function getSheetNames()
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{
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$returnValue = array();
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$worksheetCount = $this->getSheetCount();
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for ($i = 0; $i < $worksheetCount; ++$i) {
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$returnValue[] = $this->getSheet($i)->getTitle();
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}
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return $returnValue;
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}
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/**
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* Add external sheet
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*
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* @param PHPExcel_Worksheet $pSheet External sheet to add
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* @param int|null $iSheetIndex Index where sheet should go (0,1,..., or null for last)
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* @throws PHPExcel_Exception
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* @return PHPExcel_Worksheet
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*/
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public function addExternalSheet(PHPExcel_Worksheet $pSheet, $iSheetIndex = null) {
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if ($this->sheetNameExists($pSheet->getTitle())) {
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throw new PHPExcel_Exception("Workbook already contains a worksheet named '{$pSheet->getTitle()}'. Rename the external sheet first.");
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}
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// count how many cellXfs there are in this workbook currently, we will need this below
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$countCellXfs = count($this->_cellXfCollection);
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// copy all the shared cellXfs from the external workbook and append them to the current
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foreach ($pSheet->getParent()->getCellXfCollection() as $cellXf) {
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$this->addCellXf(clone $cellXf);
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}
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// move sheet to this workbook
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$pSheet->rebindParent($this);
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// update the cellXfs
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foreach ($pSheet->getCellCollection(false) as $cellID) {
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$cell = $pSheet->getCell($cellID);
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$cell->setXfIndex( $cell->getXfIndex() + $countCellXfs );
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}
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return $this->addSheet($pSheet, $iSheetIndex);
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}
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/**
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* Get named ranges
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*
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* @return PHPExcel_NamedRange[]
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*/
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public function getNamedRanges() {
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return $this->_namedRanges;
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}
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/**
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* Add named range
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*
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* @param PHPExcel_NamedRange $namedRange
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* @return PHPExcel
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*/
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public function addNamedRange(PHPExcel_NamedRange $namedRange) {
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if ($namedRange->getScope() == null) {
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// global scope
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$this->_namedRanges[$namedRange->getName()] = $namedRange;
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} else {
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// local scope
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$this->_namedRanges[$namedRange->getScope()->getTitle().'!'.$namedRange->getName()] = $namedRange;
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}
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return true;
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}
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/**
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* Get named range
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*
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* @param string $namedRange
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* @param PHPExcel_Worksheet|null $pSheet Scope. Use null for global scope
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* @return PHPExcel_NamedRange|null
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*/
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public function getNamedRange($namedRange, PHPExcel_Worksheet $pSheet = null) {
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$returnValue = null;
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if ($namedRange != '' && ($namedRange !== NULL)) {
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// first look for global defined name
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if (isset($this->_namedRanges[$namedRange])) {
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$returnValue = $this->_namedRanges[$namedRange];
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}
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// then look for local defined name (has priority over global defined name if both names exist)
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if (($pSheet !== NULL) && isset($this->_namedRanges[$pSheet->getTitle() . '!' . $namedRange])) {
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$returnValue = $this->_namedRanges[$pSheet->getTitle() . '!' . $namedRange];
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}
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}
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return $returnValue;
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}
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/**
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* Remove named range
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*
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* @param string $namedRange
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* @param PHPExcel_Worksheet|null $pSheet Scope: use null for global scope.
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* @return PHPExcel
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*/
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public function removeNamedRange($namedRange, PHPExcel_Worksheet $pSheet = null) {
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if ($pSheet === NULL) {
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if (isset($this->_namedRanges[$namedRange])) {
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unset($this->_namedRanges[$namedRange]);
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}
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} else {
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if (isset($this->_namedRanges[$pSheet->getTitle() . '!' . $namedRange])) {
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unset($this->_namedRanges[$pSheet->getTitle() . '!' . $namedRange]);
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}
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}
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return $this;
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}
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/**
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* Get worksheet iterator
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*
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* @return PHPExcel_WorksheetIterator
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*/
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public function getWorksheetIterator() {
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return new PHPExcel_WorksheetIterator($this);
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}
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|
|
|
/**
|
|
* Copy workbook (!= clone!)
|
|
*
|
|
* @return PHPExcel
|
|
*/
|
|
public function copy() {
|
|
$copied = clone $this;
|
|
|
|
$worksheetCount = count($this->_workSheetCollection);
|
|
for ($i = 0; $i < $worksheetCount; ++$i) {
|
|
$this->_workSheetCollection[$i] = $this->_workSheetCollection[$i]->copy();
|
|
$this->_workSheetCollection[$i]->rebindParent($this);
|
|
}
|
|
|
|
return $copied;
|
|
}
|
|
|
|
/**
|
|
* Implement PHP __clone to create a deep clone, not just a shallow copy.
|
|
*/
|
|
public function __clone() {
|
|
foreach($this as $key => $val) {
|
|
if (is_object($val) || (is_array($val))) {
|
|
$this->{$key} = unserialize(serialize($val));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the workbook collection of cellXfs
|
|
*
|
|
* @return PHPExcel_Style[]
|
|
*/
|
|
public function getCellXfCollection()
|
|
{
|
|
return $this->_cellXfCollection;
|
|
}
|
|
|
|
/**
|
|
* Get cellXf by index
|
|
*
|
|
* @param int $pIndex
|
|
* @return PHPExcel_Style
|
|
*/
|
|
public function getCellXfByIndex($pIndex = 0)
|
|
{
|
|
return $this->_cellXfCollection[$pIndex];
|
|
}
|
|
|
|
/**
|
|
* Get cellXf by hash code
|
|
*
|
|
* @param string $pValue
|
|
* @return PHPExcel_Style|false
|
|
*/
|
|
public function getCellXfByHashCode($pValue = '')
|
|
{
|
|
foreach ($this->_cellXfCollection as $cellXf) {
|
|
if ($cellXf->getHashCode() == $pValue) {
|
|
return $cellXf;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check if style exists in style collection
|
|
*
|
|
* @param PHPExcel_Style $style
|
|
* @return boolean
|
|
*/
|
|
public function cellXfExists($pCellStyle = null)
|
|
{
|
|
return in_array($pCellStyle, $this->_cellXfCollection, true);
|
|
}
|
|
|
|
/**
|
|
* Get default style
|
|
*
|
|
* @return PHPExcel_Style
|
|
* @throws PHPExcel_Exception
|
|
*/
|
|
public function getDefaultStyle()
|
|
{
|
|
if (isset($this->_cellXfCollection[0])) {
|
|
return $this->_cellXfCollection[0];
|
|
}
|
|
throw new PHPExcel_Exception('No default style found for this workbook');
|
|
}
|
|
|
|
/**
|
|
* Add a cellXf to the workbook
|
|
*
|
|
* @param PHPExcel_Style $style
|
|
*/
|
|
public function addCellXf(PHPExcel_Style $style)
|
|
{
|
|
$this->_cellXfCollection[] = $style;
|
|
$style->setIndex(count($this->_cellXfCollection) - 1);
|
|
}
|
|
|
|
/**
|
|
* Remove cellXf by index. It is ensured that all cells get their xf index updated.
|
|
*
|
|
* @param int $pIndex Index to cellXf
|
|
* @throws PHPExcel_Exception
|
|
*/
|
|
public function removeCellXfByIndex($pIndex = 0)
|
|
{
|
|
if ($pIndex > count($this->_cellXfCollection) - 1) {
|
|
throw new PHPExcel_Exception("CellXf index is out of bounds.");
|
|
} else {
|
|
// first remove the cellXf
|
|
array_splice($this->_cellXfCollection, $pIndex, 1);
|
|
|
|
// then update cellXf indexes for cells
|
|
foreach ($this->_workSheetCollection as $worksheet) {
|
|
foreach ($worksheet->getCellCollection(false) as $cellID) {
|
|
$cell = $worksheet->getCell($cellID);
|
|
$xfIndex = $cell->getXfIndex();
|
|
if ($xfIndex > $pIndex ) {
|
|
// decrease xf index by 1
|
|
$cell->setXfIndex($xfIndex - 1);
|
|
} else if ($xfIndex == $pIndex) {
|
|
// set to default xf index 0
|
|
$cell->setXfIndex(0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the cellXf supervisor
|
|
*
|
|
* @return PHPExcel_Style
|
|
*/
|
|
public function getCellXfSupervisor()
|
|
{
|
|
return $this->_cellXfSupervisor;
|
|
}
|
|
|
|
/**
|
|
* Get the workbook collection of cellStyleXfs
|
|
*
|
|
* @return PHPExcel_Style[]
|
|
*/
|
|
public function getCellStyleXfCollection()
|
|
{
|
|
return $this->_cellStyleXfCollection;
|
|
}
|
|
|
|
/**
|
|
* Get cellStyleXf by index
|
|
*
|
|
* @param int $pIndex
|
|
* @return PHPExcel_Style
|
|
*/
|
|
public function getCellStyleXfByIndex($pIndex = 0)
|
|
{
|
|
return $this->_cellStyleXfCollection[$pIndex];
|
|
}
|
|
|
|
/**
|
|
* Get cellStyleXf by hash code
|
|
*
|
|
* @param string $pValue
|
|
* @return PHPExcel_Style|false
|
|
*/
|
|
public function getCellStyleXfByHashCode($pValue = '')
|
|
{
|
|
foreach ($this->_cellXfStyleCollection as $cellStyleXf) {
|
|
if ($cellStyleXf->getHashCode() == $pValue) {
|
|
return $cellStyleXf;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Add a cellStyleXf to the workbook
|
|
*
|
|
* @param PHPExcel_Style $pStyle
|
|
*/
|
|
public function addCellStyleXf(PHPExcel_Style $pStyle)
|
|
{
|
|
$this->_cellStyleXfCollection[] = $pStyle;
|
|
$pStyle->setIndex(count($this->_cellStyleXfCollection) - 1);
|
|
}
|
|
|
|
/**
|
|
* Remove cellStyleXf by index
|
|
*
|
|
* @param int $pIndex
|
|
* @throws PHPExcel_Exception
|
|
*/
|
|
public function removeCellStyleXfByIndex($pIndex = 0)
|
|
{
|
|
if ($pIndex > count($this->_cellStyleXfCollection) - 1) {
|
|
throw new PHPExcel_Exception("CellStyleXf index is out of bounds.");
|
|
} else {
|
|
array_splice($this->_cellStyleXfCollection, $pIndex, 1);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Eliminate all unneeded cellXf and afterwards update the xfIndex for all cells
|
|
* and columns in the workbook
|
|
*/
|
|
public function garbageCollect()
|
|
{
|
|
// how many references are there to each cellXf ?
|
|
$countReferencesCellXf = array();
|
|
foreach ($this->_cellXfCollection as $index => $cellXf) {
|
|
$countReferencesCellXf[$index] = 0;
|
|
}
|
|
|
|
foreach ($this->getWorksheetIterator() as $sheet) {
|
|
|
|
// from cells
|
|
foreach ($sheet->getCellCollection(false) as $cellID) {
|
|
$cell = $sheet->getCell($cellID);
|
|
++$countReferencesCellXf[$cell->getXfIndex()];
|
|
}
|
|
|
|
// from row dimensions
|
|
foreach ($sheet->getRowDimensions() as $rowDimension) {
|
|
if ($rowDimension->getXfIndex() !== null) {
|
|
++$countReferencesCellXf[$rowDimension->getXfIndex()];
|
|
}
|
|
}
|
|
|
|
// from column dimensions
|
|
foreach ($sheet->getColumnDimensions() as $columnDimension) {
|
|
++$countReferencesCellXf[$columnDimension->getXfIndex()];
|
|
}
|
|
}
|
|
|
|
// remove cellXfs without references and create mapping so we can update xfIndex
|
|
// for all cells and columns
|
|
$countNeededCellXfs = 0;
|
|
foreach ($this->_cellXfCollection as $index => $cellXf) {
|
|
if ($countReferencesCellXf[$index] > 0 || $index == 0) { // we must never remove the first cellXf
|
|
++$countNeededCellXfs;
|
|
} else {
|
|
unset($this->_cellXfCollection[$index]);
|
|
}
|
|
$map[$index] = $countNeededCellXfs - 1;
|
|
}
|
|
$this->_cellXfCollection = array_values($this->_cellXfCollection);
|
|
|
|
// update the index for all cellXfs
|
|
foreach ($this->_cellXfCollection as $i => $cellXf) {
|
|
$cellXf->setIndex($i);
|
|
}
|
|
|
|
// make sure there is always at least one cellXf (there should be)
|
|
if (empty($this->_cellXfCollection)) {
|
|
$this->_cellXfCollection[] = new PHPExcel_Style();
|
|
}
|
|
|
|
// update the xfIndex for all cells, row dimensions, column dimensions
|
|
foreach ($this->getWorksheetIterator() as $sheet) {
|
|
|
|
// for all cells
|
|
foreach ($sheet->getCellCollection(false) as $cellID) {
|
|
$cell = $sheet->getCell($cellID);
|
|
$cell->setXfIndex( $map[$cell->getXfIndex()] );
|
|
}
|
|
|
|
// for all row dimensions
|
|
foreach ($sheet->getRowDimensions() as $rowDimension) {
|
|
if ($rowDimension->getXfIndex() !== null) {
|
|
$rowDimension->setXfIndex( $map[$rowDimension->getXfIndex()] );
|
|
}
|
|
}
|
|
|
|
// for all column dimensions
|
|
foreach ($sheet->getColumnDimensions() as $columnDimension) {
|
|
$columnDimension->setXfIndex( $map[$columnDimension->getXfIndex()] );
|
|
}
|
|
|
|
// also do garbage collection for all the sheets
|
|
$sheet->garbageCollect();
|
|
}
|
|
}
|
|
|
|
public function getID() {
|
|
return $this->_uniqueID;
|
|
}
|
|
|
|
}
|