phpmyadmin/libraries/classes/Font.php

<?php
/**
 * Class with Font related methods.
 */

declare(strict_types=1);

namespace PhpMyAdmin;

use function ceil;
use function is_array;
use function mb_strlen;
use function mb_strtolower;
use function preg_replace;
use function str_replace;

/**
 * Class with Font related methods.
 */
class Font
{
    /**
     * Get list with characters and the corresponding width modifiers.
     *
     * @return mixed[] with characters and corresponding width modifier
     */
    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 int          $fontSize  size of font
     * @param mixed[]|null $charLists list of characters and their width modifiers
     *
     * @return int width of the text
     */
    public function getStringWidth(
        string $text,
        string $font,
        int $fontSize,
        array|null $charLists = null,
    ): int {
        if (
            ! isset($charLists[0]['chars'], $charLists[0]['modifier'])
            || ! is_array($charLists[0]['chars'])
        ) {
            $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 += mb_strlen((string) preg_replace('/[a-z0-9]/i', '', $text)) * 0.3;

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

        $textWidth = $count * $fontSize;

        return (int) ceil($textWidth * $modifier);
    }
}