phpmyadmin/libraries/classes/Font.php

<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * Class with Font related methods.
 *
 * @package PhpMyAdmin
 */
declare(strict_types=1);

namespace PhpMyAdmin;

/**
 * Class with Font related methods.
 *
 * @package PhpMyAdmin
 */
class Font
{
    /**
     * Get list with characters and the corresponding width modifiers.
     *
     * @return array with characters and corresponding width modifier
     * @access public
     */
    public function getCharLists(): array
    {
        // list of characters and their width modifiers
        $charLists = [];

        //ijl
        $charLists[] = ["chars" => ["i", "j", "l"], "modifier" => 0.23];
        //f
        $charLists[] = ["chars" => ["f"], "modifier" => 0.27];
        //tI
        $charLists[] = ["chars" => ["t", "I"], "modifier" => 0.28];
        //r
        $charLists[] = ["chars" => ["r"], "modifier" => 0.34];
        //1
        $charLists[] = ["chars" => ["1"], "modifier" => 0.49];
        //cksvxyzJ
        $charLists[] = [
            "chars" => ["c", "k", "s", "v", "x", "y", "z", "J"],
            "modifier" => 0.5
        ];
        //abdeghnopquL023456789
        $charLists[] = [
            "chars" => [
                "a", "b", "d", "e", "g", "h", "n", "o", "p", "q", "u", "L",
                "0", "2", "3", "4", "5", "6", "7", "8", "9"
            ],
            "modifier" => 0.56
        ];
        //FTZ
        $charLists[] = ["chars" => ["F", "T", "Z"], "modifier" => 0.61];
        //ABEKPSVXY
        $charLists[] = [
            "chars" => ["A", "B", "E", "K", "P", "S", "V", "X", "Y"],
            "modifier" => 0.67
        ];
        //wCDHNRU
        $charLists[] = [
            "chars" => ["w", "C", "D", "H", "N", "R", "U"],
            "modifier" => 0.73
        ];
        //GOQ
        $charLists[] = ["chars" => ["G", "O", "Q"], "modifier" => 0.78];
        //mM
        $charLists[] = ["chars" => ["m", "M"], "modifier" => 0.84];
        //W
        $charLists[] = ["chars" => ["W"], "modifier" => 0.95];
        //" "
        $charLists[] = ["chars" => [" "], "modifier" => 0.28];

        return $charLists;
    }

    /**
     * Get width of string/text
     *
     * The text element width is calculated depending on font name
     * and font size.
     *
     * @param string     $text      string of which the width will be calculated
     * @param string     $font      name of the font like Arial,sans-serif etc
     * @param integer    $fontSize  size of font
     * @param array|null $charLists list of characters and their width modifiers
     *
     * @return integer width of the text
     * @access public
     */
    public function getStringWidth(
        string $text,
        string $font,
        int $fontSize,
        ?array $charLists = null
    ): int {
        if (empty($charLists)
            || !isset($charLists[0]["chars"]) || !is_array($charLists[0]["chars"])
            || !isset($charLists[0]["modifier"])
        ) {
            $charLists = $this->getCharLists();
        }

        /*
         * Start by counting the width, giving each character a modifying value
         */
        $count = 0;

        foreach ($charLists as $charList) {
            $count += ((mb_strlen($text)
                - mb_strlen(str_replace($charList["chars"], "", $text))
                ) * $charList["modifier"]);
        }

        $text  = str_replace(" ", "", $text);//remove the " "'s
        //all other chars
        $count = $count
            + (mb_strlen(preg_replace("/[a-z0-9]/i", "", $text)) * 0.3);

        $modifier = 1;
        $font = mb_strtolower($font);
        switch ($font) {
        /*
         * no modifier for arial and sans-serif
         */
        case 'arial':
        case 'sans-serif':
            break;
        /*
         * .92 modifier for time, serif, brushscriptstd, and californian fb
         */
        case 'times':
        case 'serif':
        case 'brushscriptstd':
        case 'californian fb':
            $modifier = .92;
            break;
        /*
         * 1.23 modifier for broadway
         */
        case 'broadway':
            $modifier = 1.23;
            break;
        }
        $textWidth = $count * $fontSize;
        return (int) ceil($textWidth * $modifier);
    }
}