inc/Parsing/ParserMode/Acronym.php

   1 <?php
   2
   3 namespace dokuwiki\Parsing\ParserMode;
   4
   5 class Acronym extends AbstractMode
   6 {
   7     // A list
   8     protected $acronyms = [];
   9     protected $pattern = '';
  10
  11     /**
  12      * Acronym constructor.
  13      *
  14      * @param string[] $acronyms
  15      */
  16     public function __construct($acronyms)
  17     {
  18         usort($acronyms, [$this, 'compare']);
  19         $this->acronyms = $acronyms;
  20     }
  21
  22     /** @inheritdoc */
  23     public function preConnect()
  24     {
  25         if (!count($this->acronyms)) return;
  26
  27         $bound = '[\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]';
  28         $acronyms = array_map(['\\dokuwiki\\Parsing\\Lexer\\Lexer', 'escape'], $this->acronyms);
  29         $this->pattern = '(?<=^|' . $bound . ')(?:' . implode('|', $acronyms) . ')(?=' . $bound . ')';
  30     }
  31
  32     /** @inheritdoc */
  33     public function connectTo($mode)
  34     {
  35         if (!count($this->acronyms)) return;
  36
  37         if (strlen($this->pattern) > 0) {
  38             $this->Lexer->addSpecialPattern($this->pattern, $mode, 'acronym');
  39         }
  40     }
  41
  42     /** @inheritdoc */
  43     public function getSort()
  44     {
  45         return 240;
  46     }
  47
  48     /**
  49      * sort callback to order by string length descending
  50      *
  51      * @param string $a
  52      * @param string $b
  53      *
  54      * @return int
  55      */
  56     protected function compare($a, $b)
  57     {
  58         $a_len = strlen($a);
  59         $b_len = strlen($b);
  60         if ($a_len > $b_len) {
  61             return -1;
  62         } elseif ($a_len < $b_len) {
  63             return 1;
  64         }
  65
  66         return 0;
  67     }
  68 }