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