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