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<?php namespace PhpOffice\PhpSpreadsheet\CalcEngine; /** * Copyright (c) 2006 - 2016 PhpSpreadsheet. * * 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 PhpSpreadsheet * * @copyright Copyright (c) 2006 - 2016 PhpSpreadsheet (https://github.com/PHPOffice/PhpSpreadsheet) * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL */ class 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 bool */ 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 bool */ private $echoDebugLog = false; /** * The debug log generated by the calculation engine. * * @var string[] */ private $debugLog = []; /** * The calculation engine cell reference stack. * * @var CyclicReferenceStack */ private $cellStack; /** * Instantiate a Calculation engine logger. * * @param CyclicReferenceStack $stack */ public function __construct(CyclicReferenceStack $stack) { $this->cellStack = $stack; } /** * Enable/Disable Calculation engine logging. * * @param bool $pValue */ public function setWriteDebugLog($pValue) { $this->writeDebugLog = $pValue; } /** * Return whether calculation engine logging is enabled or disabled. * * @return bool */ public function getWriteDebugLog() { return $this->writeDebugLog; } /** * Enable/Disable echoing of debug log information. * * @param bool $pValue */ public function setEchoDebugLog($pValue) { $this->echoDebugLog = $pValue; } /** * Return whether echoing of debug log information is enabled or disabled. * * @return bool */ public function getEchoDebugLog() { return $this->echoDebugLog; } /** * Write an entry to the calculation engine debug log. */ public function writeDebugLog(...$args) { // Only write the debug log if logging is enabled if ($this->writeDebugLog) { $message = implode($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 = []; } /** * Return the calculation engine debug log. * * @return string[] */ public function getLog() { return $this->debugLog; } }
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