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<?php
/**
* PHPExcel_CalcEngine_Logger
*
* Copyright (c) 2006 - 2015 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_Calculation
* @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version ##VERSION##, ##DATE##
*/
class PHPExcel_CalcEngine_Logger
{
/**
* Flag to determine whether a debug log should be generated by the calculation engine
* If true, then a debug log will be generated
* If false, then a debug log will not be generated
*
* @var boolean
*/
private $writeDebugLog = false;
/**
* Flag to determine whether a debug log should be echoed by the calculation engine
* If true, then a debug log will be echoed
* If false, then a debug log will not be echoed
* A debug log can only be echoed if it is generated
*
* @var boolean
*/
private $echoDebugLog = false;
/**
* The debug log generated by the calculation engine
*
* @var string[]
*/
private $debugLog = array();
/**
* The calculation engine cell reference stack
*
* @var PHPExcel_CalcEngine_CyclicReferenceStack
*/
private $cellStack;
/**
* Instantiate a Calculation engine logger
*
* @param PHPExcel_CalcEngine_CyclicReferenceStack $stack
*/
public function __construct(PHPExcel_CalcEngine_CyclicReferenceStack $stack)
{
$this->cellStack = $stack;
}
/**
* Enable/Disable Calculation engine logging
*
* @param boolean $pValue
*/
public function setWriteDebugLog($pValue = false)
{
$this->writeDebugLog = $pValue;
}
/**
* Return whether calculation engine logging is enabled or disabled
*
* @return boolean
*/
public function getWriteDebugLog()
{
return $this->writeDebugLog;
}
/**
* Enable/Disable echoing of debug log information
*
* @param boolean $pValue
*/
public function setEchoDebugLog($pValue = false)
{
$this->echoDebugLog = $pValue;
}
/**
* Return whether echoing of debug log information is enabled or disabled
*
* @return boolean
*/
public function getEchoDebugLog()
{
return $this->echoDebugLog;
}
/**
* Write an entry to the calculation engine debug log
*/
public function writeDebugLog()
{
// Only write the debug log if logging is enabled
if ($this->writeDebugLog) {
$message = implode(func_get_args());
$cellReference = implode(' -> ', $this->cellStack->showStack());
if ($this->echoDebugLog) {
echo $cellReference,
($this->cellStack->count() > 0 ? ' => ' : ''),
$message,
PHP_EOL;
}
$this->debugLog[] = $cellReference .
($this->cellStack->count() > 0 ? ' => ' : '') .
$message;
}
}
/**
* Clear the calculation engine debug log
*/
public function clearLog()
{
$this->debugLog = array();
}
/**
* Return the calculation engine debug log
*
* @return string[]
*/
public function getLog()
{
return $this->debugLog;
}
}
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