File Source for Font.php

<?php
/**
* PHPExcel
*
* Copyright (c) 2006 - 2009 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_Shared
* @copyright Copyright (c) 2006 - 2009 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 1.6.5, 2009-01-05
*/
/**
* PHPExcel_Shared_Font
*
* @category PHPExcel
* @package PHPExcel_Shared
* @copyright Copyright (c) 2006 - 2009 PHPExcel (http://www.codeplex.com/PHPExcel)
*/
class PHPExcel_Shared_Font
{
/**
* Calculate an (approximate) OpenXML column width, based on font size and text contained
*
* @param int $fontSize Font size (in pixels or points)
* @param bool $fontSizeInPixels Is the font size specified in pixels (true) or in points (false) ?
* @param string $columnText Text to calculate width
* @return int Column width
*/
public static function calculateColumnWidth($fontSize = 9, $fontSizeInPixels = false, $columnText = '') {
if (!$fontSizeInPixels) {
// Translate points size to pixel size
$fontSize = PHPExcel_Shared_Font::fontSizeToPixels($fontSize);
}
// If it is rich text, use rich text...
if ($columnText instanceof PHPExcel_RichText) {
$columnText = $columnText->getPlainText();
}
// Only measure the part before the first newline character
if (strpos($columnText, "\r") !== false) {
$columnText = substr($columnText, 0, strpos($columnText, "\r"));
}
if (strpos($columnText, "\n") !== false) {
$columnText = substr($columnText, 0, strpos($columnText, "\n"));
}
// Calculate column width
return round( ( (strlen($columnText) * $fontSize + 5) / $fontSize * 256 ) / 256, 6);
}
/**
* Calculate an (approximate) pixel size, based on a font points size
*
* @param int $fontSizeInPoints Font size (in points)
* @return int Font size (in pixels)
*/
public static function fontSizeToPixels($fontSizeInPoints = 12) {
return ((16 / 12) * $fontSizeInPoints);
}
}

Source for file Font.php