phpmyadmin/libraries/Font.class.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * Class with Font related methods.
   5  *
   6  * @package PhpMyAdmin
   7  */
   8 if (! defined('PHPMYADMIN')) {
   9     exit;
  10 }
  11
  12 /**
  13  * Class with Font related methods.
  14  *
  15  * @package PhpMyAdmin
  16  */
  17 class PMA_Font
  18 {
  19     /**
  20      * Get list with characters and the corresponding width modifiers.
  21      *
  22      * @param string $font name of the font like Arial,sans-serif etc
  23      *
  24      * @return array with characters and corresponding width modifier
  25      * @access public
  26      */
  27     public static function getCharLists($font)
  28     {
  29         // list of characters and their width modifiers
  30         $charLists = array();
  31
  32         //ijl
  33         $charLists[] = array("chars" => array("i", "j", "l"), "modifier" => 0.23);
  34         //f
  35         $charLists[] = array("chars" => array("f"), "modifier" => 0.27);
  36         //tI
  37         $charLists[] = array("chars" => array("t", "I"), "modifier" => 0.28);
  38         //r
  39         $charLists[] = array("chars" => array("r"), "modifier" => 0.34);
  40         //1
  41         $charLists[] = array("chars" => array("1"), "modifier" => 0.49);
  42         //cksvxyzJ
  43         $charLists[] = array(
  44             "chars" => array("c", "k", "s", "v", "x", "y", "z", "J"),
  45             "modifier" => 0.5
  46         );
  47         //abdeghnopquL023456789
  48         $charLists[] = array(
  49             "chars" => array(
  50                 "a", "b", "d", "e", "g", "h", "n", "o", "p", "q", "u", "L",
  51                 "0", "2", "3", "4", "5", "6", "7", "8", "9"
  52             ),
  53             "modifier" => 0.56
  54         );
  55         //FTZ
  56         $charLists[] = array("chars" => array("F", "T", "Z"), "modifier" => 0.61);
  57         //ABEKPSVXY
  58         $charLists[] = array(
  59             "chars" => array("A", "B", "E", "K", "P", "S", "V", "X", "Y"),
  60             "modifier" => 0.67
  61         );
  62         //wCDHNRU
  63         $charLists[] = array(
  64             "chars" => array("w", "C", "D", "H", "N", "R", "U"),
  65             "modifier" => 0.73
  66         );
  67         //GOQ
  68         $charLists[] = array("chars" => array("G", "O", "Q"), "modifier" => 0.78);
  69         //mM
  70         $charLists[] = array("chars" => array("m", "M"), "modifier" => 0.84);
  71         //W
  72         $charLists[] = array("chars" => array("W"), "modifier" => 0.95);
  73         //" "
  74         $charLists[] = array("chars" => array(" "), "modifier" => 0.28);
  75
  76         return $charLists;
  77     }
  78
  79     /**
  80      * Get width of string/text
  81      *
  82      * The text element width is calculated depending on font name
  83      * and font size.
  84      *
  85      * @param string  $text      string of which the width will be calculated
  86      * @param string  $font      name of the font like Arial,sans-serif etc
  87      * @param integer $fontSize  size of font
  88      * @param array   $charLists list of characters and their width modifiers
  89      *
  90      * @return integer width of the text
  91      * @access public
  92      */
  93     public static function getStringWidth($text, $font, $fontSize, $charLists = null)
  94     {
  95         if (empty($charLists) || !is_array($charLists)
  96             || !isset($charLists[0]["chars"]) || !is_array($charLists[0]["chars"])
  97             || !isset($charLists[0]["modifier"])
  98         ) {
  99             $charLists = self::getCharLists($font);
 100         }
 101
 102         /*
 103          * Start by counting the width, giving each character a modifying value
 104          */
 105         $count = 0;
 106
 107         foreach ($charLists as $charList) {
 108             $count += ((strlen($text)
 109                 - strlen(str_replace($charList["chars"], "", $text))
 110                 ) * $charList["modifier"]);
 111         }
 112
 113         $text  = str_replace(" ", "", $text);//remove the " "'s
 114         //all other chars
 115         $count = $count + (strlen(preg_replace("/[a-z0-9]/i", "", $text)) * 0.3);
 116
 117         $modifier = 1;
 118         $font = strtolower($font);
 119         switch ($font) {
 120         /*
 121          * no modifier for arial and sans-serif
 122          */
 123         case 'arial':
 124         case 'sans-serif':
 125             break;
 126         /*
 127          * .92 modifer for time, serif, brushscriptstd, and californian fb
 128          */
 129         case 'times':
 130         case 'serif':
 131         case 'brushscriptstd':
 132         case 'californian fb':
 133             $modifier = .92;
 134             break;
 135         /*
 136          * 1.23 modifier for broadway
 137          */
 138         case 'broadway':
 139             $modifier = 1.23;
 140             break;
 141         }
 142         $textWidth = $count*$fontSize;
 143         return ceil($textWidth*$modifier);
 144     }
 145 }
 146 ?>