Font.php in Loft Data Grids 6.2

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vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/Font.php

<?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_Shared
 * @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    ##VERSION##, ##DATE##
 */

/**
 * PHPExcel_Shared_Font
 *
 * @category   PHPExcel
 * @package    PHPExcel_Shared
 * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Shared_Font {

  /* Methods for resolving autosize value */
  const AUTOSIZE_METHOD_APPROX = 'approx';
  const AUTOSIZE_METHOD_EXACT = 'exact';
  private static $_autoSizeMethods = array(
    self::AUTOSIZE_METHOD_APPROX,
    self::AUTOSIZE_METHOD_EXACT,
  );

  /** Character set codes used by BIFF5-8 in Font records */
  const CHARSET_ANSI_LATIN = 0x0;
  const CHARSET_SYSTEM_DEFAULT = 0x1;
  const CHARSET_SYMBOL = 0x2;
  const CHARSET_APPLE_ROMAN = 0x4d;
  const CHARSET_ANSI_JAPANESE_SHIFTJIS = 0x80;
  const CHARSET_ANSI_KOREAN_HANGUL = 0x81;
  const CHARSET_ANSI_KOREAN_JOHAB = 0x82;
  const CHARSET_ANSI_CHINESE_SIMIPLIFIED = 0x86;

  //	gb2312
  const CHARSET_ANSI_CHINESE_TRADITIONAL = 0x88;

  //	big5
  const CHARSET_ANSI_GREEK = 0xa1;
  const CHARSET_ANSI_TURKISH = 0xa2;
  const CHARSET_ANSI_VIETNAMESE = 0xa3;
  const CHARSET_ANSI_HEBREW = 0xb1;
  const CHARSET_ANSI_ARABIC = 0xb2;
  const CHARSET_ANSI_BALTIC = 0xba;
  const CHARSET_ANSI_CYRILLIC = 0xcc;
  const CHARSET_ANSI_THAI = 0xdd;
  const CHARSET_ANSI_LATIN_II = 0xee;
  const CHARSET_OEM_LATIN_I = 0xff;

  //  XXX: Constants created!

  /** Font filenames */
  const ARIAL = 'arial.ttf';
  const ARIAL_BOLD = 'arialbd.ttf';
  const ARIAL_ITALIC = 'ariali.ttf';
  const ARIAL_BOLD_ITALIC = 'arialbi.ttf';
  const CALIBRI = 'CALIBRI.TTF';
  const CALIBRI_BOLD = 'CALIBRIB.TTF';
  const CALIBRI_ITALIC = 'CALIBRII.TTF';
  const CALIBRI_BOLD_ITALIC = 'CALIBRIZ.TTF';
  const COMIC_SANS_MS = 'comic.ttf';
  const COMIC_SANS_MS_BOLD = 'comicbd.ttf';
  const COURIER_NEW = 'cour.ttf';
  const COURIER_NEW_BOLD = 'courbd.ttf';
  const COURIER_NEW_ITALIC = 'couri.ttf';
  const COURIER_NEW_BOLD_ITALIC = 'courbi.ttf';
  const GEORGIA = 'georgia.ttf';
  const GEORGIA_BOLD = 'georgiab.ttf';
  const GEORGIA_ITALIC = 'georgiai.ttf';
  const GEORGIA_BOLD_ITALIC = 'georgiaz.ttf';
  const IMPACT = 'impact.ttf';
  const LIBERATION_SANS = 'LiberationSans-Regular.ttf';
  const LIBERATION_SANS_BOLD = 'LiberationSans-Bold.ttf';
  const LIBERATION_SANS_ITALIC = 'LiberationSans-Italic.ttf';
  const LIBERATION_SANS_BOLD_ITALIC = 'LiberationSans-BoldItalic.ttf';
  const LUCIDA_CONSOLE = 'lucon.ttf';
  const LUCIDA_SANS_UNICODE = 'l_10646.ttf';
  const MICROSOFT_SANS_SERIF = 'micross.ttf';
  const PALATINO_LINOTYPE = 'pala.ttf';
  const PALATINO_LINOTYPE_BOLD = 'palab.ttf';
  const PALATINO_LINOTYPE_ITALIC = 'palai.ttf';
  const PALATINO_LINOTYPE_BOLD_ITALIC = 'palabi.ttf';
  const SYMBOL = 'symbol.ttf';
  const TAHOMA = 'tahoma.ttf';
  const TAHOMA_BOLD = 'tahomabd.ttf';
  const TIMES_NEW_ROMAN = 'times.ttf';
  const TIMES_NEW_ROMAN_BOLD = 'timesbd.ttf';
  const TIMES_NEW_ROMAN_ITALIC = 'timesi.ttf';
  const TIMES_NEW_ROMAN_BOLD_ITALIC = 'timesbi.ttf';
  const TREBUCHET_MS = 'trebuc.ttf';
  const TREBUCHET_MS_BOLD = 'trebucbd.ttf';
  const TREBUCHET_MS_ITALIC = 'trebucit.ttf';
  const TREBUCHET_MS_BOLD_ITALIC = 'trebucbi.ttf';
  const VERDANA = 'verdana.ttf';
  const VERDANA_BOLD = 'verdanab.ttf';
  const VERDANA_ITALIC = 'verdanai.ttf';
  const VERDANA_BOLD_ITALIC = 'verdanaz.ttf';

  /**
   * AutoSize method
   *
   * @var string
   */
  private static $autoSizeMethod = self::AUTOSIZE_METHOD_APPROX;

  /**
   * Path to folder containing TrueType font .ttf files
   *
   * @var string
   */
  private static $trueTypeFontPath = null;

  /**
   * How wide is a default column for a given default font and size?
   * Empirical data found by inspecting real Excel files and reading off the pixel width
   * in Microsoft Office Excel 2007.
   *
   * @var array
   */
  public static $defaultColumnWidths = array(
    'Arial' => array(
      1 => array(
        'px' => 24,
        'width' => 12.0,
      ),
      2 => array(
        'px' => 24,
        'width' => 12.0,
      ),
      3 => array(
        'px' => 32,
        'width' => 10.6640625,
      ),
      4 => array(
        'px' => 32,
        'width' => 10.6640625,
      ),
      5 => array(
        'px' => 40,
        'width' => 10.0,
      ),
      6 => array(
        'px' => 48,
        'width' => 9.59765625,
      ),
      7 => array(
        'px' => 48,
        'width' => 9.59765625,
      ),
      8 => array(
        'px' => 56,
        'width' => 9.33203125,
      ),
      9 => array(
        'px' => 64,
        'width' => 9.140625,
      ),
      10 => array(
        'px' => 64,
        'width' => 9.140625,
      ),
    ),
    'Calibri' => array(
      1 => array(
        'px' => 24,
        'width' => 12.0,
      ),
      2 => array(
        'px' => 24,
        'width' => 12.0,
      ),
      3 => array(
        'px' => 32,
        'width' => 10.6640625,
      ),
      4 => array(
        'px' => 32,
        'width' => 10.6640625,
      ),
      5 => array(
        'px' => 40,
        'width' => 10.0,
      ),
      6 => array(
        'px' => 48,
        'width' => 9.59765625,
      ),
      7 => array(
        'px' => 48,
        'width' => 9.59765625,
      ),
      8 => array(
        'px' => 56,
        'width' => 9.33203125,
      ),
      9 => array(
        'px' => 56,
        'width' => 9.33203125,
      ),
      10 => array(
        'px' => 64,
        'width' => 9.140625,
      ),
      11 => array(
        'px' => 64,
        'width' => 9.140625,
      ),
    ),
    'Verdana' => array(
      1 => array(
        'px' => 24,
        'width' => 12.0,
      ),
      2 => array(
        'px' => 24,
        'width' => 12.0,
      ),
      3 => array(
        'px' => 32,
        'width' => 10.6640625,
      ),
      4 => array(
        'px' => 32,
        'width' => 10.6640625,
      ),
      5 => array(
        'px' => 40,
        'width' => 10.0,
      ),
      6 => array(
        'px' => 48,
        'width' => 9.59765625,
      ),
      7 => array(
        'px' => 48,
        'width' => 9.59765625,
      ),
      8 => array(
        'px' => 64,
        'width' => 9.140625,
      ),
      9 => array(
        'px' => 72,
        'width' => 9.0,
      ),
      10 => array(
        'px' => 72,
        'width' => 9.0,
      ),
    ),
  );

  /**
   * Set autoSize method
   *
   * @param string $pValue
   * @return	 boolean					Success or failure
   */
  public static function setAutoSizeMethod($pValue = self::AUTOSIZE_METHOD_APPROX) {
    if (!in_array($pValue, self::$_autoSizeMethods)) {
      return FALSE;
    }
    self::$autoSizeMethod = $pValue;
    return TRUE;
  }

  /**
   * Get autoSize method
   *
   * @return string
   */
  public static function getAutoSizeMethod() {
    return self::$autoSizeMethod;
  }

  /**
   * Set the path to the folder containing .ttf files. There should be a trailing slash.
   * Typical locations on variout some platforms:
   *	<ul>
   *		<li>C:/Windows/Fonts/</li>
   *		<li>/usr/share/fonts/truetype/</li>
   *		<li>~/.fonts/</li>
   *	</ul>
   *
   * @param string $pValue
   */
  public static function setTrueTypeFontPath($pValue = '') {
    self::$trueTypeFontPath = $pValue;
  }

  /**
   * Get the path to the folder containing .ttf files.
   *
   * @return string
   */
  public static function getTrueTypeFontPath() {
    return self::$trueTypeFontPath;
  }

  /**
   * Calculate an (approximate) OpenXML column width, based on font size and text contained
   *
   * @param 	PHPExcel_Style_Font			$font			Font object
   * @param 	PHPExcel_RichText|string	$cellText		Text to calculate width
   * @param 	integer						$rotation		Rotation angle
   * @param 	PHPExcel_Style_Font|NULL	$defaultFont	Font object
   * @return 	integer		Column width
   */
  public static function calculateColumnWidth(PHPExcel_Style_Font $font, $cellText = '', $rotation = 0, PHPExcel_Style_Font $defaultFont = null) {

    // If it is rich text, use plain text
    if ($cellText instanceof PHPExcel_RichText) {
      $cellText = $cellText
        ->getPlainText();
    }

    // Special case if there are one or more newline characters ("\n")
    if (strpos($cellText, "\n") !== false) {
      $lineTexts = explode("\n", $cellText);
      $lineWidths = array();
      foreach ($lineTexts as $lineText) {
        $lineWidths[] = self::calculateColumnWidth($font, $lineText, $rotation = 0, $defaultFont);
      }
      return max($lineWidths);

      // width of longest line in cell
    }

    // Try to get the exact text width in pixels
    $approximate = self::$autoSizeMethod == self::AUTOSIZE_METHOD_APPROX;
    if (!$approximate) {
      $columnWidthAdjust = ceil(self::getTextWidthPixelsExact('n', $font, 0) * 1.07);
      try {

        // Width of text in pixels excl. padding
        // and addition because Excel adds some padding, just use approx width of 'n' glyph
        $columnWidth = self::getTextWidthPixelsExact($cellText, $font, $rotation) + $columnWidthAdjust;
      } catch (PHPExcel_Exception $e) {
        $approximate = true;
      }
    }
    if ($approximate) {
      $columnWidthAdjust = self::getTextWidthPixelsApprox('n', $font, 0);

      // Width of text in pixels excl. padding, approximation
      // and addition because Excel adds some padding, just use approx width of 'n' glyph
      $columnWidth = self::getTextWidthPixelsApprox($cellText, $font, $rotation) + $columnWidthAdjust;
    }

    // Convert from pixel width to column width
    $columnWidth = PHPExcel_Shared_Drawing::pixelsToCellDimension($columnWidth, $defaultFont);

    // Return
    return round($columnWidth, 6);
  }

  /**
   * Get GD text width in pixels for a string of text in a certain font at a certain rotation angle
   *
   * @param string $text
   * @param PHPExcel_Style_Font
   * @param int $rotation
   * @return int
   * @throws PHPExcel_Exception
   */
  public static function getTextWidthPixelsExact($text, PHPExcel_Style_Font $font, $rotation = 0) {
    if (!function_exists('imagettfbbox')) {
      throw new PHPExcel_Exception('GD library needs to be enabled');
    }

    // font size should really be supplied in pixels in GD2,
    // but since GD2 seems to assume 72dpi, pixels and points are the same
    $fontFile = self::getTrueTypeFontFileFromFont($font);
    $textBox = imagettfbbox($font
      ->getSize(), $rotation, $fontFile, $text);

    // Get corners positions
    $lowerLeftCornerX = $textBox[0];

    //		$lowerLeftCornerY  = $textBox[1];
    $lowerRightCornerX = $textBox[2];

    //		$lowerRightCornerY = $textBox[3];
    $upperRightCornerX = $textBox[4];

    //		$upperRightCornerY = $textBox[5];
    $upperLeftCornerX = $textBox[6];

    //		$upperLeftCornerY  = $textBox[7];
    // Consider the rotation when calculating the width
    $textWidth = max($lowerRightCornerX - $upperLeftCornerX, $upperRightCornerX - $lowerLeftCornerX);
    return $textWidth;
  }

  /**
   * Get approximate width in pixels for a string of text in a certain font at a certain rotation angle
   *
   * @param string $columnText
   * @param PHPExcel_Style_Font $font
   * @param int $rotation
   * @return int Text width in pixels (no padding added)
   */
  public static function getTextWidthPixelsApprox($columnText, PHPExcel_Style_Font $font = null, $rotation = 0) {
    $fontName = $font
      ->getName();
    $fontSize = $font
      ->getSize();

    // Calculate column width in pixels. We assume fixed glyph width. Result varies with font name and size.
    switch ($fontName) {
      case 'Calibri':

        // value 8.26 was found via interpolation by inspecting real Excel files with Calibri 11 font.
        $columnWidth = (int) (8.26 * PHPExcel_Shared_String::CountCharacters($columnText));
        $columnWidth = $columnWidth * $fontSize / 11;

        // extrapolate from font size
        break;
      case 'Arial':

        // value 7 was found via interpolation by inspecting real Excel files with Arial 10 font.
        //				$columnWidth = (int) (7 * PHPExcel_Shared_String::CountCharacters($columnText));
        // value 8 was set because of experience in different exports at Arial 10 font.
        $columnWidth = (int) (8 * PHPExcel_Shared_String::CountCharacters($columnText));
        $columnWidth = $columnWidth * $fontSize / 10;

        // extrapolate from font size
        break;
      case 'Verdana':

        // value 8 was found via interpolation by inspecting real Excel files with Verdana 10 font.
        $columnWidth = (int) (8 * PHPExcel_Shared_String::CountCharacters($columnText));
        $columnWidth = $columnWidth * $fontSize / 10;

        // extrapolate from font size
        break;
      default:

        // just assume Calibri
        $columnWidth = (int) (8.26 * PHPExcel_Shared_String::CountCharacters($columnText));
        $columnWidth = $columnWidth * $fontSize / 11;

        // extrapolate from font size
        break;
    }

    // Calculate approximate rotated column width
    if ($rotation !== 0) {
      if ($rotation == -165) {

        // stacked text
        $columnWidth = 4;

        // approximation
      }
      else {

        // rotated text
        $columnWidth = $columnWidth * cos(deg2rad($rotation)) + $fontSize * abs(sin(deg2rad($rotation))) / 5;

        // approximation
      }
    }

    // pixel width is an integer
    return (int) $columnWidth;
  }

  /**
   * 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 = 11) {
    return (int) (4 / 3 * $fontSizeInPoints);
  }

  /**
   * Calculate an (approximate) pixel size, based on inch size
   *
   * @param 	int		$sizeInInch	Font size (in inch)
   * @return 	int		Size (in pixels)
   */
  public static function inchSizeToPixels($sizeInInch = 1) {
    return $sizeInInch * 96;
  }

  /**
   * Calculate an (approximate) pixel size, based on centimeter size
   *
   * @param 	int		$sizeInCm	Font size (in centimeters)
   * @return 	int		Size (in pixels)
   */
  public static function centimeterSizeToPixels($sizeInCm = 1) {
    return $sizeInCm * 37.795275591;
  }

  /**
   * Returns the font path given the font
   *
   * @param PHPExcel_Style_Font
   * @return string Path to TrueType font file
   */
  public static function getTrueTypeFontFileFromFont($font) {
    if (!file_exists(self::$trueTypeFontPath) || !is_dir(self::$trueTypeFontPath)) {
      throw new PHPExcel_Exception('Valid directory to TrueType Font files not specified');
    }
    $name = $font
      ->getName();
    $bold = $font
      ->getBold();
    $italic = $font
      ->getItalic();

    // Check if we can map font to true type font file
    switch ($name) {
      case 'Arial':
        $fontFile = $bold ? $italic ? self::ARIAL_BOLD_ITALIC : self::ARIAL_BOLD : ($italic ? self::ARIAL_ITALIC : self::ARIAL);
        break;
      case 'Calibri':
        $fontFile = $bold ? $italic ? self::CALIBRI_BOLD_ITALIC : self::CALIBRI_BOLD : ($italic ? self::CALIBRI_ITALIC : self::CALIBRI);
        break;
      case 'Courier New':
        $fontFile = $bold ? $italic ? self::COURIER_NEW_BOLD_ITALIC : self::COURIER_NEW_BOLD : ($italic ? self::COURIER_NEW_ITALIC : self::COURIER_NEW);
        break;
      case 'Comic Sans MS':
        $fontFile = $bold ? self::COMIC_SANS_MS_BOLD : self::COMIC_SANS_MS;
        break;
      case 'Georgia':
        $fontFile = $bold ? $italic ? self::GEORGIA_BOLD_ITALIC : self::GEORGIA_BOLD : ($italic ? self::GEORGIA_ITALIC : self::GEORGIA);
        break;
      case 'Impact':
        $fontFile = self::IMPACT;
        break;
      case 'Liberation Sans':
        $fontFile = $bold ? $italic ? self::LIBERATION_SANS_BOLD_ITALIC : self::LIBERATION_SANS_BOLD : ($italic ? self::LIBERATION_SANS_ITALIC : self::LIBERATION_SANS);
        break;
      case 'Lucida Console':
        $fontFile = self::LUCIDA_CONSOLE;
        break;
      case 'Lucida Sans Unicode':
        $fontFile = self::LUCIDA_SANS_UNICODE;
        break;
      case 'Microsoft Sans Serif':
        $fontFile = self::MICROSOFT_SANS_SERIF;
        break;
      case 'Palatino Linotype':
        $fontFile = $bold ? $italic ? self::PALATINO_LINOTYPE_BOLD_ITALIC : self::PALATINO_LINOTYPE_BOLD : ($italic ? self::PALATINO_LINOTYPE_ITALIC : self::PALATINO_LINOTYPE);
        break;
      case 'Symbol':
        $fontFile = self::SYMBOL;
        break;
      case 'Tahoma':
        $fontFile = $bold ? self::TAHOMA_BOLD : self::TAHOMA;
        break;
      case 'Times New Roman':
        $fontFile = $bold ? $italic ? self::TIMES_NEW_ROMAN_BOLD_ITALIC : self::TIMES_NEW_ROMAN_BOLD : ($italic ? self::TIMES_NEW_ROMAN_ITALIC : self::TIMES_NEW_ROMAN);
        break;
      case 'Trebuchet MS':
        $fontFile = $bold ? $italic ? self::TREBUCHET_MS_BOLD_ITALIC : self::TREBUCHET_MS_BOLD : ($italic ? self::TREBUCHET_MS_ITALIC : self::TREBUCHET_MS);
        break;
      case 'Verdana':
        $fontFile = $bold ? $italic ? self::VERDANA_BOLD_ITALIC : self::VERDANA_BOLD : ($italic ? self::VERDANA_ITALIC : self::VERDANA);
        break;
      default:
        throw new PHPExcel_Exception('Unknown font name "' . $name . '". Cannot map to TrueType font file');
        break;
    }
    $fontFile = self::$trueTypeFontPath . $fontFile;

    // Check if file actually exists
    if (!file_exists($fontFile)) {
      throw new PHPExcel_Exception('TrueType Font file not found');
    }
    return $fontFile;
  }

  /**
   * Returns the associated charset for the font name.
   *
   * @param string $name Font name
   * @return int Character set code
   */
  public static function getCharsetFromFontName($name) {
    switch ($name) {

      // Add more cases. Check FONT records in real Excel files.
      case 'EucrosiaUPC':
        return self::CHARSET_ANSI_THAI;
      case 'Wingdings':
        return self::CHARSET_SYMBOL;
      case 'Wingdings 2':
        return self::CHARSET_SYMBOL;
      case 'Wingdings 3':
        return self::CHARSET_SYMBOL;
      default:
        return self::CHARSET_ANSI_LATIN;
    }
  }

  /**
   * Get the effective column width for columns without a column dimension or column with width -1
   * For example, for Calibri 11 this is 9.140625 (64 px)
   *
   * @param PHPExcel_Style_Font $font The workbooks default font
   * @param boolean $pPixels true = return column width in pixels, false = return in OOXML units
   * @return mixed Column width
   */
  public static function getDefaultColumnWidthByFont(PHPExcel_Style_Font $font, $pPixels = false) {
    if (isset(self::$defaultColumnWidths[$font
      ->getName()][$font
      ->getSize()])) {

      // Exact width can be determined
      $columnWidth = $pPixels ? self::$defaultColumnWidths[$font
        ->getName()][$font
        ->getSize()]['px'] : self::$defaultColumnWidths[$font
        ->getName()][$font
        ->getSize()]['width'];
    }
    else {

      // We don't have data for this particular font and size, use approximation by
      // extrapolating from Calibri 11
      $columnWidth = $pPixels ? self::$defaultColumnWidths['Calibri'][11]['px'] : self::$defaultColumnWidths['Calibri'][11]['width'];
      $columnWidth = $columnWidth * $font
        ->getSize() / 11;

      // Round pixels to closest integer
      if ($pPixels) {
        $columnWidth = (int) round($columnWidth);
      }
    }
    return $columnWidth;
  }

  /**
   * Get the effective row height for rows without a row dimension or rows with height -1
   * For example, for Calibri 11 this is 15 points
   *
   * @param PHPExcel_Style_Font $font The workbooks default font
   * @return float Row height in points
   */
  public static function getDefaultRowHeightByFont(PHPExcel_Style_Font $font) {
    switch ($font
      ->getName()) {
      case 'Arial':
        switch ($font
          ->getSize()) {
          case 10:

            // inspection of Arial 10 workbook says 12.75pt ~17px
            $rowHeight = 12.75;
            break;
          case 9:

            // inspection of Arial 9 workbook says 12.00pt ~16px
            $rowHeight = 12;
            break;
          case 8:

            // inspection of Arial 8 workbook says 11.25pt ~15px
            $rowHeight = 11.25;
            break;
          case 7:

            // inspection of Arial 7 workbook says 9.00pt ~12px
            $rowHeight = 9;
            break;
          case 6:
          case 5:

            // inspection of Arial 5,6 workbook says 8.25pt ~11px
            $rowHeight = 8.25;
            break;
          case 4:

            // inspection of Arial 4 workbook says 6.75pt ~9px
            $rowHeight = 6.75;
            break;
          case 3:

            // inspection of Arial 3 workbook says 6.00pt ~8px
            $rowHeight = 6;
            break;
          case 2:
          case 1:

            // inspection of Arial 1,2 workbook says 5.25pt ~7px
            $rowHeight = 5.25;
            break;
          default:

            // use Arial 10 workbook as an approximation, extrapolation
            $rowHeight = 12.75 * $font
              ->getSize() / 10;
            break;
        }
        break;
      case 'Calibri':
        switch ($font
          ->getSize()) {
          case 11:

            // inspection of Calibri 11 workbook says 15.00pt ~20px
            $rowHeight = 15;
            break;
          case 10:

            // inspection of Calibri 10 workbook says 12.75pt ~17px
            $rowHeight = 12.75;
            break;
          case 9:

            // inspection of Calibri 9 workbook says 12.00pt ~16px
            $rowHeight = 12;
            break;
          case 8:

            // inspection of Calibri 8 workbook says 11.25pt ~15px
            $rowHeight = 11.25;
            break;
          case 7:

            // inspection of Calibri 7 workbook says 9.00pt ~12px
            $rowHeight = 9;
            break;
          case 6:
          case 5:

            // inspection of Calibri 5,6 workbook says 8.25pt ~11px
            $rowHeight = 8.25;
            break;
          case 4:

            // inspection of Calibri 4 workbook says 6.75pt ~9px
            $rowHeight = 6.75;
            break;
          case 3:

            // inspection of Calibri 3 workbook says 6.00pt ~8px
            $rowHeight = 6.0;
            break;
          case 2:
          case 1:

            // inspection of Calibri 1,2 workbook says 5.25pt ~7px
            $rowHeight = 5.25;
            break;
          default:

            // use Calibri 11 workbook as an approximation, extrapolation
            $rowHeight = 15 * $font
              ->getSize() / 11;
            break;
        }
        break;
      case 'Verdana':
        switch ($font
          ->getSize()) {
          case 10:

            // inspection of Verdana 10 workbook says 12.75pt ~17px
            $rowHeight = 12.75;
            break;
          case 9:

            // inspection of Verdana 9 workbook says 11.25pt ~15px
            $rowHeight = 11.25;
            break;
          case 8:

            // inspection of Verdana 8 workbook says 10.50pt ~14px
            $rowHeight = 10.5;
            break;
          case 7:

            // inspection of Verdana 7 workbook says 9.00pt ~12px
            $rowHeight = 9.0;
            break;
          case 6:
          case 5:

            // inspection of Verdana 5,6 workbook says 8.25pt ~11px
            $rowHeight = 8.25;
            break;
          case 4:

            // inspection of Verdana 4 workbook says 6.75pt ~9px
            $rowHeight = 6.75;
            break;
          case 3:

            // inspection of Verdana 3 workbook says 6.00pt ~8px
            $rowHeight = 6;
            break;
          case 2:
          case 1:

            // inspection of Verdana 1,2 workbook says 5.25pt ~7px
            $rowHeight = 5.25;
            break;
          default:

            // use Verdana 10 workbook as an approximation, extrapolation
            $rowHeight = 12.75 * $font
              ->getSize() / 10;
            break;
        }
        break;
      default:

        // just use Calibri as an approximation
        $rowHeight = 15 * $font
          ->getSize() / 11;
        break;
    }
    return $rowHeight;
  }

}

Classes

Name	Description
PHPExcel_Shared_Font	PHPExcel_Shared_Font