From: Tim Düsterhus <duesterhus@woltlab.com>
Date: Fri, 5 Aug 2022 07:42:49 +0000 (+0200)
Subject: Remove PHP-based syntax highlighters
X-Git-Tag: 6.0.0_Alpha_1~1074^2
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ccabb1328d6f9bea2700a6aa4a005b11a8983f4b;p=GitHub%2FWoltLab%2FWCF.git

Remove PHP-based syntax highlighters

These are long-deprecated. If someone desires to still use them over Prism,
they can grab them from the commit history.

Resolves #4296
---

diff --git a/wcfsetup/install/files/lib/data/bbcode/BBCodeCache.class.php b/wcfsetup/install/files/lib/data/bbcode/BBCodeCache.class.php
index d9e6c38c52..9a235c7219 100644
--- a/wcfsetup/install/files/lib/data/bbcode/BBCodeCache.class.php
+++ b/wcfsetup/install/files/lib/data/bbcode/BBCodeCache.class.php
@@ -22,13 +22,6 @@ class BBCodeCache extends SingletonFactory
      */
     protected $cachedBBCodes = [];
 
-    /**
-     * list of known highlighters
-     * @var string[]
-     * @deprecated  since 5.2, use Prism to highlight your code.
-     */
-    protected $highlighters = [];
-
     /**
      * @inheritDoc
      */
@@ -69,19 +62,4 @@ class BBCodeCache extends SingletonFactory
     {
         return $this->cachedBBCodes[$tag]->getAttributes();
     }
-
-    /**
-     * Returns a list of known highlighters.
-     *
-     * @return  string[]
-     * @deprecated  since 5.2, use Prism to highlight your code.
-     */
-    public function getHighlighters()
-    {
-        if (empty($this->highlighters)) {
-            $this->highlighters = BBCodeCacheBuilder::getInstance()->getData([], 'highlighters');
-        }
-
-        return $this->highlighters;
-    }
 }
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/BashHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/BashHighlighter.class.php
deleted file mode 100644
index 62ab9f704e..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/BashHighlighter.class.php
+++ /dev/null
@@ -1,128 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-/**
- * Highlights syntax of bash scripts.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class BashHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected $separators = [';', '='];
-
-    /**
-     * @inheritDoc
-     */
-    protected $quotes = ['"', "'", '`'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $singleLineComment = ['#'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $commentStart = [];
-
-    /**
-     * @inheritDoc
-     */
-    protected $commentEnd = [];
-
-    /**
-     * @inheritDoc
-     */
-    protected $operators = [
-        '||',
-        '&&',
-        '&',
-        '|',
-        '<<=',
-        '>>=',
-        '<<',
-        '+=',
-        '-=',
-        '*=',
-        '/=',
-        '%=',
-        '-gt',
-        '-lt',
-        '-n',
-        '-a',
-        '-o',
-        '+',
-        '-',
-        '*',
-        '/',
-        '%',
-        '<',
-        '?',
-        ':',
-        '==',
-        '!=',
-        '=',
-        '!',
-        '>',
-        '2>',
-        '>>',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords1 = [
-        'true',
-        'false',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords2 = [
-        'if',
-        'then',
-        'else',
-        'fi',
-        'for',
-        'until',
-        'while',
-        'do',
-        'done',
-        'case',
-        'in',
-        'esac',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords3 = [
-        'echo',
-        'exit',
-        'unset',
-        'read',
-        '[',
-        ']',
-        'test',
-        'let',
-        'sed',
-        'grep',
-        'awk',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords4 = [
-        '$?',
-    ];
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/CHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/CHighlighter.class.php
deleted file mode 100644
index 851cff2dae..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/CHighlighter.class.php
+++ /dev/null
@@ -1,160 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-/**
- * Highlights syntax of c / c++ source code.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class CHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected $separators = ['(', ')', '{', '}', '[', ']', ';', '.', ','];
-
-    /**
-     * @inheritDoc
-     */
-    protected $operators = [
-        '=',
-        '>',
-        '<',
-        '!',
-        '~',
-        '?',
-        ':',
-        '==',
-        '<=',
-        '>=',
-        '!=',
-        '&&',
-        '||',
-        '++',
-        '--',
-        '+',
-        '-',
-        '*',
-        '/',
-        '&',
-        '|',
-        '^',
-        '%',
-        '<<',
-        '>>',
-        '>>>',
-        '+=',
-        '-=',
-        '*=',
-        '/=',
-        '&=',
-        '|=',
-        '^=',
-        '%=',
-        '<<=',
-        '>>=',
-        '>>>=',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords1 = [
-        'and',
-        'and_eq',
-        'asm',
-        'bitand',
-        'bitor',
-        'break',
-        'case',
-        'catch',
-        'compl',
-        'const_cast',
-        'continue',
-        'default',
-        'delete',
-        'do',
-        'dynamic_cast',
-        'else',
-        'for',
-        'fortran',
-        'friend',
-        'goto',
-        'if',
-        'new',
-        'not',
-        'not_eq',
-        'operator',
-        'or',
-        'or_eq',
-        'private',
-        'protected',
-        'public',
-        'reinterpret_cast',
-        'return',
-        'sizeof',
-        'static_cast',
-        'switch',
-        'this',
-        'throw',
-        'try',
-        'typeid',
-        'using',
-        'while',
-        'xor',
-        'xor_eq',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords2 = [
-        'auto',
-        'bool',
-        'char',
-        'class',
-        'const',
-        'double',
-        'enum',
-        'explicit',
-        'export',
-        'extern',
-        'float',
-        'inline',
-        'int',
-        'long',
-        'mutable',
-        'namespace',
-        'register',
-        'short',
-        'signed',
-        'static',
-        'struct',
-        'template',
-        'typedef',
-        'typename',
-        'union',
-        'unsigned',
-        'virtual',
-        'void',
-        'volatile',
-        'wchar_t',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords3 = [
-        '#include',
-        '#define',
-        '#if',
-        '#else',
-        '#ifdef',
-        '#endif',
-    ];
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/CssHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/CssHighlighter.class.php
deleted file mode 100644
index ea3c47f3d9..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/CssHighlighter.class.php
+++ /dev/null
@@ -1,784 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-/**
- * Highlights syntax of cascading style sheets.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class CssHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected function highlightNumbers($string)
-    {
-        $string = \preg_replace(
-            '!(?<=' . $this->separatorsRegEx . ')(-?\d*\.?\d+(?:px|pt|em|%|ex|in|cm|mm|pc)?)(?=' . $this->separatorsRegEx . ')!i',
-            '<span class="hlNumbers">\\0</span>',
-            $string
-        );
-
-        // highlight colors (hexadecimal numbers)
-        return \preg_replace(
-            '!(?<=' . $this->separatorsRegEx . ')(#([0-9a-f]{3}|[0-9a-f]{6}))(?=' . $this->separatorsRegEx . ')!i',
-            '<span class="hlColors">\\0</span>',
-            $string
-        );
-    }
-
-    /**
-     * @inheritDoc
-     */
-    protected function highlightKeywords($string)
-    {
-        $string = parent::highlightKeywords($string);
-
-        return \preg_replace(
-            '!(?<=' . $this->separatorsRegEx . ')(@[a-z0-9-]+)(?=' . $this->separatorsRegEx . ')!i',
-            '<span class="hlKeywords5">\\0</span>',
-            $string
-        );
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function highlight($string)
-    {
-        $string = \str_replace(
-            'span',
-            '053a0024219422ca9215c0a3ed0578ee76cff477',
-            $string
-        ); // fix to not highlight the spans of the highlighter
-        $string = \str_replace(':link', ':li@@nk', $string); // fix to highlight pseudo-class different than tag
-        $string = \str_replace(
-            ['right:', 'left:'],
-            ['r@@ight:', 'l@@eft:'],
-            $string
-        ); // fix to highlight properties different than values
-
-        $string = parent::highlight($string);
-
-        $string = \str_replace(
-            ['r@@ight', 'l@@eft'],
-            ['right', 'left'],
-            $string
-        ); // fix to highlight properties different than values
-        $string = \str_replace('li@@nk', 'link', $string); // fix to highlight pseudo-class different than tag
-
-        return \str_replace(
-            '053a0024219422ca9215c0a3ed0578ee76cff477',
-            'span',
-            $string
-        ); // fix to not highlight the spans of the highlighter
-    }
-
-    /**
-     * @inheritDoc
-     */
-    protected $singleLineComment = ['//'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $separators = ['(', ')', '{', '}', ';', '[', ']', ':', ',', '.'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords1 = [
-        'align-content',
-        'align-items',
-        'align-self',
-        'animation',
-        'animation-delay',
-        'animation-direction',
-        'animation-duration',
-        'animation-fill-mode',
-        'animation-iteration-count',
-        'animation-name',
-        'animation-play-state',
-        'animation-timing-function',
-        'azimuth',
-        'backface-visibility',
-        'background',
-        'background-attachment',
-        'background-clip',
-        'background-color',
-        'background-image',
-        'background-origin',
-        'background-position',
-        'background-repeat',
-        'background-size',
-        'border',
-        'border-bottom',
-        'border-bottom-color',
-        'border-bottom-radius',
-        'border-bottom-left-radius',
-        'border-bottom-right-radius',
-        'border-bottom-style',
-        'border-bottom-width',
-        'border-collapse',
-        'border-color',
-        'border-image',
-        'border-image-outset',
-        'border-image-repeat',
-        'border-image-slice',
-        'border-image-source',
-        'border-image-width',
-        'border-l@@eft',
-        'border-left-color',
-        'border-left-radius',
-        'border-left-style',
-        'border-left-width',
-        'border-radius',
-        'border-r@@ight',
-        'border-right-color',
-        'border-right-radius',
-        'border-right-style',
-        'border-right-width',
-        'border-spacing',
-        'border-style',
-        'border-top',
-        'border-top-color',
-        'border-top-radius',
-        'border-top-left-radius',
-        'border-top-right-radius',
-        'border-top-style',
-        'border-top-width',
-        'border-width',
-        'bottom',
-        'box-shadow',
-        'box-sizing',
-        'caption-side',
-        'clear',
-        'clip',
-        'color',
-        'column-count',
-        'column-fill',
-        'column-gap',
-        'column-rule',
-        'column-rule-color',
-        'column-rule-style',
-        'column-rule-width',
-        'column-span',
-        'column-width',
-        'columns',
-        'content',
-        'counter-increment',
-        'counter-reset',
-        'cue',
-        'cue-after',
-        'cue-before',
-        'cursor',
-        'direction',
-        'display',
-        'elevation',
-        'empty-cells',
-        'flex',
-        'flex-basis',
-        'flex-direction',
-        'flex-flow',
-        'flex-grow',
-        'flex-shrink',
-        'flex-wrap',
-        'float',
-        'font',
-        'font-family',
-        'font-size',
-        'font-size-adjust',
-        'font-stretch',
-        'font-style',
-        'font-variant',
-        'font-weight',
-        'height',
-        'justify-content',
-        'l@@eft',
-        'letter-spacing',
-        'line-height',
-        'list-style',
-        'list-style-image',
-        'list-style-position',
-        'list-style-type',
-        'margin',
-        'margin-bottom',
-        'margin-l@@eft',
-        'margin-r@@ight',
-        'margin-top',
-        'max-height',
-        'max-width',
-        'min-height',
-        'min-width',
-        'opacity',
-        'order',
-        'orphans',
-        'outline',
-        'outline-color',
-        'outline-offset',
-        'outline-style',
-        'outline-width',
-        'overflow',
-        'overflow-x',
-        'overflow-y',
-        'padding',
-        'padding-bottom',
-        'padding-l@@eft',
-        'padding-r@@ight',
-        'padding-top',
-        'page-break-after',
-        'page-break-before',
-        'page-break-inside',
-        'pause',
-        'pause-after',
-        'pause-before',
-        'perspective',
-        'perspective-origin',
-        'pitch',
-        'pitch-range',
-        'play-during',
-        'position',
-        'quotes',
-        'resize',
-        'richness',
-        'r@@ight',
-        'scrollbar-3dlight-color',
-        'scrollbar-arrow-color',
-        'scrollbar-base-color',
-        'scrollbar-darkshadow-color',
-        'scrollbar-face-color',
-        'scrollbar-highlight-color',
-        'scrollbar-shadow-color',
-        'scrollbar-track-color',
-        'speak',
-        'speak-header',
-        'speak-numeral',
-        'speak-punctuation',
-        'speech-rate',
-        'stress',
-        'tab-size',
-        'table-layout',
-        'text-align',
-        'text-align-last',
-        'text-decoration',
-        'text-decoration-color',
-        'text-decoration-line',
-        'text-decoration-style',
-        'text-indent',
-        'text-justify',
-        'text-overflow',
-        'text-shadow',
-        'text-transform',
-        'top',
-        'transform',
-        'transform-origin',
-        'transform-style',
-        'transition',
-        'transition-delay',
-        'transition-duration',
-        'transition-property',
-        'transition-timing-function',
-        'unicode-bidi',
-        'vertical-align',
-        'visibility',
-        'voice-family',
-        'volume',
-        'white-space',
-        'widows',
-        'width',
-        'word-break',
-        'word-spacing',
-        'word-wrap',
-        'z-index',
-        '!important',
-        '@charset',
-        '@font-face',
-        '@import',
-        '@keyframes',
-        '@media',
-        '@page',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords2 = [
-        'left-side',
-        'far-left',
-        'left',
-        'center-left',
-        'center-right',
-        'center',
-        'far-right',
-        'right-side',
-        'right',
-        'behind',
-        'leftwards',
-        'rightwards',
-        'inherit',
-        'scroll',
-        'fixed',
-        'transparent',
-        'none',
-        'repeat-x',
-        'repeat-y',
-        'repeat',
-        'no-repeat',
-        'collapse',
-        'separate',
-        'auto',
-        'top',
-        'bottom',
-        'both',
-        'open-quote',
-        'close-quote',
-        'no-open-quote',
-        'no-close-quote',
-        'crosshair',
-        'default',
-        'pointer',
-        'move',
-        'e-resize',
-        'ne-resize',
-        'nw-resize',
-        'n-resize',
-        'se-resize',
-        'sw-resize',
-        's-resize',
-        'text',
-        'wait',
-        'help',
-        'ltr',
-        'rtl',
-        'inline',
-        'block',
-        'list-item',
-        'run-in',
-        'compact',
-        'marker',
-        'table', // table
-        'inline-table',
-        'table-row-group',
-        'table-header-group',
-        'table-footer-group',
-        'table-row',
-        'table-column-group',
-        'table-column',
-        'table-cell',
-        'table-caption',
-        'below',
-        'level',
-        'above',
-        'higher',
-        'lower',
-        'show',
-        'hide',
-        'caption', // caption
-        'icon',
-        'menu', // menu
-        'message-box',
-        'small-caption',
-        'status-bar',
-        'normal',
-        'wider',
-        'narrower',
-        'ultra-condensed',
-        'extra-condensed',
-        'condensed',
-        'semi-condensed',
-        'semi-expanded',
-        'expanded',
-        'extra-expanded',
-        'ultra-expanded',
-        'italic',
-        'oblique',
-        'small-caps',
-        'bold',
-        'bolder',
-        'lighter',
-        'inside',
-        'outside',
-        'disc',
-        'circle',
-        'square',
-        'decimal',
-        'decimal-leading-zero',
-        'lower-roman',
-        'upper-roman',
-        'lower-greek',
-        'lower-alpha',
-        'lower-latin',
-        'upper-alpha',
-        'upper-latin',
-        'hebrew',
-        'armenian',
-        'georgian',
-        'cjk-ideographic',
-        'hiragana',
-        'katakana',
-        'hiragana-iroha',
-        'katakana-iroha',
-        'crop',
-        'cross',
-        'invert',
-        'visible',
-        'hidden',
-        'always',
-        'avoid',
-        'x-low',
-        'low',
-        'medium',
-        'high',
-        'x-high',
-        'mix?',
-        'repeat?',
-        'static',
-        'relative',
-        'absolute',
-        'portrait',
-        'landscape',
-        'spell-out',
-        'once',
-        'digits',
-        'continuous',
-        'code',
-        'x-slow',
-        'slow',
-        'fast',
-        'x-fast',
-        'faster',
-        'slower',
-        'justify',
-        'underline',
-        'overline',
-        'line-through',
-        'blink',
-        'capitalize',
-        'uppercase',
-        'lowercase',
-        'embed',
-        'bidi-override',
-        'baseline',
-        'sub',
-        'super',
-        'text-top',
-        'middle',
-        'text-bottom',
-        'silent',
-        'x-soft',
-        'soft',
-        'loud',
-        'x-loud',
-        'pre',
-        'nowrap',
-        'serif',
-        'sans-serif',
-        'cursive',
-        'fantasy',
-        'monospace',
-        'empty',
-        'string',
-        'strict',
-        'loose',
-        'char',
-        'true',
-        'false',
-        'dotted',
-        'dashed',
-        'solid',
-        'double',
-        'groove',
-        'ridge',
-        'inset',
-        'outset',
-        'larger',
-        'smaller',
-        'xx-small',
-        'x-small',
-        'small',
-        'large',
-        'x-large',
-        'xx-large',
-        'all',
-        'newspaper',
-        'distribute',
-        'distribute-all-lines',
-        'distribute-center-last',
-        'inter-word',
-        'inter-ideograph',
-        'inter-cluster',
-        'kashida',
-        'ideograph-alpha',
-        'ideograph-numeric',
-        'ideograph-parenthesis',
-        'ideograph-space',
-        'keep-all',
-        'break-all',
-        'break-word',
-        'lr-tb',
-        'tb-rl',
-        'thin',
-        'thick',
-        'inline-block',
-        'w-resize',
-        'hand',
-        'distribute-letter',
-        'distribute-space',
-        'whitespace',
-        'male',
-        'female',
-        'child',
-        'print',
-        'screen',
-        'tty',
-        'aural',
-        'all',
-        'braille',
-        'embossed',
-        'handheld',
-        'projection',
-        'tv',
-        'hsl',
-        'hsla',
-        'rgb',
-        'rgba',
-        'flex',
-        'inline-flex',
-        'initial',
-        'matrix',
-        'matrix3d',
-        'perspective',
-        'rotate',
-        'rotate3d',
-        'rotatex',
-        'rotatey',
-        'rotatez',
-        'scale',
-        'scale3d',
-        'scalex',
-        'scaley',
-        'scalez',
-        'skew',
-        'skwex',
-        'skewy',
-        'skewz',
-        'translate',
-        'translate3d',
-        'translatex',
-        'translatey',
-        'translatez',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords3 = [
-        'active',
-        'after',
-        'any',
-        'before',
-        'checked',
-        'default',
-        'dir',
-        'disabled',
-        'empty',
-        'enabled',
-        'first',
-        'first-child',
-        'first-letter',
-        'first-line',
-        'first-of-type',
-        'focus',
-        'fullscreen',
-        'indeterminate',
-        'in-range',
-        'invalid',
-        'lang',
-        'last-child',
-        'last-of-type',
-        'li@@nk', // link
-        'hover',
-        'not',
-        'nth-child',
-        'nth-last-child',
-        'nth-last-of-type',
-        'nth-of-type',
-        'only-child',
-        'only-of-type',
-        'optional',
-        'out-of-range',
-        'read-only',
-        'read-write',
-        'root',
-        'scope',
-        'target',
-        'valid',
-        'visited',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords4 = [
-        'abbr',
-        'acronym',
-        'address',
-        'area',
-        'article',
-        'aside',
-        'audio',
-        'a',
-        'base',
-        'bdi',
-        'bdo',
-        'big',
-        'blockquote',
-        'body',
-        'br',
-        'button',
-        'b',
-        'canvas',
-        'caption',
-        'cite',
-        'code',
-        'col',
-        'colgroup',
-        'command',
-        'datalist',
-        'dd',
-        'del',
-        'details',
-        'dfn',
-        'div',
-        'dl',
-        'dt',
-        'embed',
-        'em',
-        'fieldset',
-        'figcaption',
-        'figure',
-        'footer',
-        'form',
-        'h1',
-        'h2',
-        'h3',
-        'h4',
-        'h5',
-        'h6',
-        'head',
-        'header',
-        'hgroup',
-        'hr',
-        'html',
-        'iframe',
-        'img',
-        'input',
-        'ins',
-        'i',
-        'kbd',
-        'keygen',
-        'label',
-        'legend',
-        'li',
-        'link',
-        'map',
-        'mark',
-        'menu',
-        'meta',
-        'meter',
-        'nav',
-        'noscript',
-        'object',
-        'ol',
-        'optgroup',
-        'option',
-        'output',
-        'param',
-        'pre',
-        'progress',
-        'p',
-        'q',
-        'rbc',
-        'rb',
-        'rp',
-        'rtc',
-        'rt',
-        'ruby',
-        'samp',
-        'script',
-        'section',
-        'select',
-        'small',
-        'source',
-        '053a0024219422ca9215c0a3ed0578ee76cff477', // span
-        'strong',
-        'style',
-        'sub',
-        'summary',
-        'sup',
-        'table',
-        'tbody',
-        'td',
-        'textarea',
-        'tfoot',
-        'thead',
-        'th',
-        'time',
-        'title',
-        'track',
-        'tr',
-        'tt',
-        'ul',
-        'u',
-        'var',
-        'video',
-        'wbr',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    public $keywords5 = [
-        // modifying
-        'darken',
-        'lighten',
-        'saturate',
-        'desaturate',
-        'fadein',
-        'fadeout',
-        'fade',
-        'spin',
-        'mix',
-        // reading
-        'lightness',
-        'hue',
-        'saturation',
-        'alpha',
-        'percentage',
-        // typechecking
-        'isnumber',
-        'iscolor',
-        'isstring',
-        'iskeyword',
-        'isurl',
-        'ispixel',
-        'ispercentage',
-        'isem',
-        // math
-        'round',
-        'ceil',
-        'floor',
-        // if
-        'when',
-        'not',
-        'and',
-        'true',
-        // others
-        '&',
-    ];
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/DiffHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/DiffHighlighter.class.php
deleted file mode 100644
index 36445c5b99..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/DiffHighlighter.class.php
+++ /dev/null
@@ -1,65 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-use wcf\util\StringUtil;
-
-/**
- * Highlights difference files.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class DiffHighlighter extends Highlighter
-{
-    /**
-     * keywords for an added line, the + is used in unified diffs, the > in
-     * normal diffs
-     * @var string[]
-     */
-    protected $add = ["+", ">"];
-
-    /**
-     * keywords for an deleted line, the - is used in unified diff, the < in
-     * normal diffs
-     * @var string[]
-     */
-    protected $delete = ["-", "<"];
-
-    /**
-     * splitter in changes for normal diff
-     * @var string[]
-     */
-    protected $splitter = ["---"];
-
-    /**
-     * keywords for the line info, the @ is used in unified diffs, the numbers
-     * in normal diffs
-     * @var string[]
-     */
-    protected $info = ["@", '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
-
-    /**
-     * @inheritDoc
-     */
-    public function highlight($string)
-    {
-        $lines = \explode("\n", $string);
-        foreach ($lines as $key => $val) {
-            if (\in_array(\mb_substr($val, 0, 1), $this->info) || \in_array($val, $this->splitter)) {
-                $lines[$key] = '<span class="hlComments">' . StringUtil::encodeHTML($val) . '</span>';
-            } elseif (\in_array(\mb_substr($val, 0, 1), $this->add)) {
-                $lines[$key] = '<span class="hlAdded">' . StringUtil::encodeHTML($val) . '</span>';
-            } elseif (\in_array(\mb_substr($val, 0, 1), $this->delete)) {
-                $lines[$key] = '<span class="hlRemoved">' . StringUtil::encodeHTML($val) . '</span>';
-            } else {
-                $lines[$key] = StringUtil::encodeHTML($val);
-            }
-        }
-
-        return \implode("\n", $lines);
-    }
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/Highlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/Highlighter.class.php
deleted file mode 100644
index c59daf4866..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/Highlighter.class.php
+++ /dev/null
@@ -1,415 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-use wcf\system\Regex;
-use wcf\system\SingletonFactory;
-use wcf\system\WCF;
-use wcf\util\StringStack;
-use wcf\util\StringUtil;
-
-/**
- * Highlights syntax of source code.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-abstract class Highlighter extends SingletonFactory
-{
-    /**
-     * allow multiline quotes
-     * @var bool
-     */
-    protected $allowsNewslinesInQuotes = false;
-
-    /**
-     * comment end delimiter
-     * @var string[]
-     */
-    protected $commentEnd = ["*/"];
-
-    /**
-     * comment start delimiter
-     * @var string[]
-     */
-    protected $commentStart = ["/*"];
-
-    /**
-     * escape sequence
-     * @var string[]
-     */
-    protected $escapeSequence = ["\\"];
-
-    /**
-     * categorized keywords
-     * @var string[]
-     */
-    protected $keywords1 = [];
-
-    /**
-     * categorized keywords
-     * @var string[]
-     */
-    protected $keywords2 = [];
-
-    /**
-     * categorized keywords
-     * @var string[]
-     */
-    protected $keywords3 = [];
-
-    /**
-     * categorized keywords
-     * @var string[]
-     */
-    protected $keywords4 = [];
-
-    /**
-     * categorized keywords
-     * @var string[]
-     */
-    protected $keywords5 = [];
-
-    /**
-     * list of arithmetic operators
-     * @var string[]
-     */
-    protected $operators = [];
-
-    /**
-     * list of quote marks
-     * @var string[]
-     */
-    protected $quotes = ["'", '"'];
-
-    /**
-     * list of separator sequences
-     * @var string[]
-     */
-    protected $separators = [];
-
-    /**
-     * inline comment sequence
-     * @var string[]
-     */
-    protected $singleLineComment = ["//"];
-
-    /**
-     * regular expression to extract comments
-     * @var Regex
-     */
-    public $cacheCommentsRegEx;
-
-    /**
-     * regular expression to find quote marks
-     * @var Regex
-     */
-    public $quotesRegEx;
-
-    /**
-     * regular expression to find string separators
-     * @var string
-     */
-    public $separatorsRegEx = '';
-
-    /**
-     * @inheritDoc
-     */
-    protected function init()
-    {
-        $this->buildRegularExpressions();
-    }
-
-    /**
-     * Returns the title of this highlighter.
-     *
-     * @return  string
-     */
-    public function getTitle()
-    {
-        // regex to extract the Highlighter out of the namespaced classname
-        $reType = new Regex('\\\\?wcf\\\\system\\\\bbcode\\\\highlighter\\\\(.*)Highlighter', Regex::CASE_INSENSITIVE);
-
-        return WCF::getLanguage()->get('wcf.bbcode.code.' . $reType->replace(
-            \strtolower(static::class),
-            '\1'
-        ) . '.title');
-    }
-
-    /**
-     * Highlights syntax of source code.
-     *
-     * @param string $string
-     * @return  string
-     */
-    public function highlight($string)
-    {
-        // cache comments
-        $string = $this->cacheComments($string);
-
-        // cache quotes
-        $string = $this->cacheQuotes($string);
-
-        // encode html
-        $string = StringUtil::encodeHTML($string);
-
-        // do highlight
-        $string = $this->highlightOperators($string);
-        $string = $this->highlightKeywords($string);
-        $string = $this->highlightNumbers($string);
-
-        // insert and highlight quotes
-        $string = $this->highlightQuotes($string);
-
-        // insert and highlight comments
-        return $this->highlightComments($string);
-    }
-
-    /**
-     * Builds regular expressions.
-     */
-    protected function buildRegularExpressions()
-    {
-        // quotes regex
-        $quotedEscapeSequence = \preg_quote(\implode('', $this->escapeSequence));
-        $quotesRegEx = '';
-        foreach ($this->quotes as $quote) {
-            if ($quotesRegEx !== '') {
-                $quotesRegEx .= '|';
-            }
-            if (!\is_array($quote)) {
-                $quote = [$quote, $quote];
-            }
-            [$opening, $closing] = $quote;
-
-            $opening = \preg_quote($opening);
-            $closing = \preg_quote($closing);
-
-            if ($quotedEscapeSequence) {
-                $quotesRegEx .= $opening . '(?>[^' . $closing . $quotedEscapeSequence . ']+|(?:' . $quotedEscapeSequence . '.)+)*' . $closing;
-            } else {
-                $quotesRegEx .= $opening . '(?>[^' . $closing . $quotedEscapeSequence . '])*' . $closing;
-            }
-        }
-
-        if ($quotesRegEx !== '') {
-            $quotesRegEx = '(?:' . $quotesRegEx . ')';
-            $this->quotesRegEx = new Regex(
-                $quotesRegEx,
-                $this->allowsNewslinesInQuotes ? Regex::DOT_ALL : Regex::MODIFIER_NONE
-            );
-        }
-
-        // cache comment regex
-        if (!empty($this->singleLineComment) || !empty($this->commentStart)) {
-            $cacheCommentsRegEx = '';
-
-            if ($quotesRegEx !== '') {
-                $cacheCommentsRegEx .= "(" . $quotesRegEx . ")|";
-            } else {
-                $cacheCommentsRegEx .= "()";
-            }
-
-            $cacheCommentsRegEx .= "(";
-            if (!empty($this->commentStart)) {
-                $cacheCommentsRegEx .= '(?:' . \implode(
-                    '|',
-                    \array_map('preg_quote', $this->commentStart)
-                ) . ').*?(?:' . \implode(
-                    '|',
-                    \array_map('preg_quote', $this->commentEnd)
-                ) . ')';
-
-                if (!empty($this->singleLineComment)) {
-                    $cacheCommentsRegEx .= '|';
-                }
-            }
-
-            if (!empty($this->singleLineComment)) {
-                $cacheCommentsRegEx .= "(?:" . \implode(
-                    '|',
-                    \array_map('preg_quote', $this->singleLineComment)
-                ) . ")[^\n]*";
-            }
-
-            $cacheCommentsRegEx .= ")";
-
-            $this->cacheCommentsRegEx = new Regex($cacheCommentsRegEx, Regex::DOT_ALL);
-        }
-
-        $this->separatorsRegEx = StringUtil::encodeHTML(\implode(
-            '|',
-            \array_map('preg_quote', $this->separators)
-        )) . '|\s|&nbsp;|^|$|>|<';
-    }
-
-    /**
-     * Caches comments.
-     *
-     * @param string $string
-     * @return  string
-     */
-    protected function cacheComments($string)
-    {
-        if ($this->cacheCommentsRegEx !== null) {
-            $string = $this->cacheCommentsRegEx->replace($string, static function (array $matches) {
-                $string = $matches[1];
-                if (isset($matches[2])) {
-                    $comment = $matches[2];
-                } else {
-                    $comment = '';
-                }
-
-                $hash = '';
-                if (!empty($comment)) {
-                    // create hash
-                    $hash = StringStack::pushToStringStack(
-                        '<span class="hlComments">' . StringUtil::encodeHTML($comment) . '</span>',
-                        'highlighterComments'
-                    );
-                }
-
-                return $string . $hash;
-            });
-        }
-
-        return $string;
-    }
-
-    /**
-     * Caches quotes.
-     *
-     * @param string $string
-     * @return  string
-     */
-    protected function cacheQuotes($string)
-    {
-        if ($this->quotesRegEx !== null) {
-            $string = $this->quotesRegEx->replace($string, static function (array $matches) {
-                return StringStack::pushToStringStack(
-                    '<span class="hlQuotes">' . StringUtil::encodeHTML($matches[0]) . '</span>',
-                    'highlighterQuotes'
-                );
-            });
-        }
-
-        return $string;
-    }
-
-    /**
-     * Highlights operators.
-     *
-     * @param string $string
-     * @return  string
-     */
-    protected function highlightOperators($string)
-    {
-        if (!empty($this->operators)) {
-            $string = \preg_replace(
-                '!(' . StringUtil::encodeHTML(\implode(
-                    '|',
-                    \array_map('preg_quote', $this->operators)
-                )) . ')!i',
-                '<span class="hlOperators">\\0</span>',
-                $string
-            );
-        }
-
-        return $string;
-    }
-
-    /**
-     * Highlights keywords.
-     *
-     * @param string $string
-     * @return  string
-     */
-    protected function highlightKeywords($string)
-    {
-        $_this = $this;
-        $buildKeywordRegex = static function (array $keywords) use ($_this) {
-            return '!(?<=' . $_this->separatorsRegEx . ')(' . StringUtil::encodeHTML(\implode(
-                '|',
-                \array_map('preg_quote', $keywords)
-            )) . ')(?=' . $_this->separatorsRegEx . ')!i';
-        };
-
-        if (!empty($this->keywords1)) {
-            $string = \preg_replace(
-                $buildKeywordRegex($this->keywords1),
-                '<span class="hlKeywords1">\\0</span>',
-                $string
-            );
-        }
-        if (!empty($this->keywords2)) {
-            $string = \preg_replace(
-                $buildKeywordRegex($this->keywords2),
-                '<span class="hlKeywords2">\\0</span>',
-                $string
-            );
-        }
-        if (!empty($this->keywords3)) {
-            $string = \preg_replace(
-                $buildKeywordRegex($this->keywords3),
-                '<span class="hlKeywords3">\\0</span>',
-                $string
-            );
-        }
-        if (!empty($this->keywords4)) {
-            $string = \preg_replace(
-                $buildKeywordRegex($this->keywords4),
-                '<span class="hlKeywords4">\\0</span>',
-                $string
-            );
-        }
-        if (!empty($this->keywords5)) {
-            $string = \preg_replace(
-                $buildKeywordRegex($this->keywords5),
-                '<span class="hlKeywords5">\\0</span>',
-                $string
-            );
-        }
-
-        return $string;
-    }
-
-    /**
-     * Highlights numbers.
-     *
-     * @param string $string
-     * @return  string
-     */
-    protected function highlightNumbers($string)
-    {
-        return \preg_replace(
-            '!(?<=' . $this->separatorsRegEx . ')(-?\d+)(?=' . $this->separatorsRegEx . ')!i',
-            '<span class="hlNumbers">\\0</span>',
-            $string
-        );
-    }
-
-    /**
-     * Highlights quotes.
-     *
-     * @param string $string
-     * @return  string
-     */
-    protected function highlightQuotes($string)
-    {
-        return StringStack::reinsertStrings($string, 'highlighterQuotes');
-    }
-
-    /**
-     * Highlights comments.
-     *
-     * @param string $string
-     * @return  string
-     */
-    protected function highlightComments($string)
-    {
-        return StringStack::reinsertStrings($string, 'highlighterComments');
-    }
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/HtmlHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/HtmlHighlighter.class.php
deleted file mode 100644
index ac1c97b19f..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/HtmlHighlighter.class.php
+++ /dev/null
@@ -1,75 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-use wcf\system\Regex;
-use wcf\util\StringStack;
-use wcf\util\StringUtil;
-
-/**
- * Highlights syntax of (x)html documents including style and script blocks.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class HtmlHighlighter extends XmlHighlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected function cacheComments($string)
-    {
-        // cache inline scripts and inline css
-        $string = $this->cacheScriptsAndStyles($string);
-
-        return parent::cacheComments($string);
-    }
-
-    /**
-     * Caches scripts and styles in the given string.
-     *
-     * @param string $string
-     * @return  string
-     */
-    protected function cacheScriptsAndStyles($string)
-    {
-        $regex = new Regex('(<(style|script)[^>]*>)(.*?)(</\\2>)', Regex::CASE_INSENSITIVE | Regex::DOT_ALL);
-
-        return $regex->replace($string, static function ($matches) {
-            $type = ($matches[2] === 'script') ? 'js' : 'css';
-
-            // strip slashes
-            $content = \str_replace('\\"', '"', $matches[3]);
-            $openingTag = \str_replace('\\"', '"', $matches[1]);
-            $closingTag = \str_replace('\\"', '"', $matches[4]);
-
-            if (StringUtil::trim($content) == '') {
-                return $matches[0];
-            }
-
-            $class = '\wcf\system\bbcode\highlighter\\' . \ucfirst($type) . 'Highlighter';
-
-            /** @noinspection PhpUndefinedMethodInspection */
-            return $openingTag . StringStack::pushToStringStack(
-                '<span class="' . $type . 'Highlighter">' . $class::getInstance()->highlight($content) . '</span>',
-                'htmlHighlighter' . \ucfirst($type)
-            ) . $closingTag;
-        });
-    }
-
-    /**
-     * @inheritDoc
-     */
-    protected function highlightComments($string)
-    {
-        $string = parent::highlightComments($string);
-
-        // highlight script and style blocks
-        $string = StringStack::reinsertStrings($string, 'htmlHighlighterJs');
-
-        return StringStack::reinsertStrings($string, 'htmlHighlighterCss');
-    }
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/JavaHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/JavaHighlighter.class.php
deleted file mode 100644
index 9d7be09b82..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/JavaHighlighter.class.php
+++ /dev/null
@@ -1,105 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-/**
- * Highlights syntax of java source code.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class JavaHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected $separators = ["(", ")", "{", "}", "[", "]", ";", ".", ",", "<", ">"];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords2 = [
-        'package',
-        'abstract',
-        'break',
-        'case',
-        'catch',
-        'class',
-        'continue',
-        'default',
-        'do',
-        'else',
-        'extends',
-        'false',
-        'finally',
-        'for',
-        'goto',
-        'if',
-        'implements',
-        'instanceof',
-        'interface',
-        'native',
-        'new',
-        'null',
-        'private',
-        'protected',
-        'public',
-        'return',
-        'super',
-        'strictfp',
-        'switch',
-        'synchronized',
-        'this',
-        'throws',
-        'throw',
-        'transient',
-        'true',
-        'try',
-        'volatile',
-        'while',
-        'boolean',
-        'byte',
-        'char',
-        'const',
-        'double',
-        'final',
-        'float',
-        'int',
-        'long',
-        'short',
-        'static',
-        'void',
-        'import',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords3 = [
-        'Boolean',
-        'Float',
-        'Character',
-        'Double',
-        'Enum',
-        'Long',
-        'Short',
-        'Integer',
-        'Math',
-        'Object',
-        'String',
-        'StringBuffer',
-        'System',
-        'Thread',
-        'Exception',
-        'Throwable',
-        'Runnable',
-        'Appendable',
-        'Cloneable',
-        'HashMap',
-        'List',
-        'ArrayList',
-    ];
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/JsHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/JsHighlighter.class.php
deleted file mode 100644
index 7958242861..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/JsHighlighter.class.php
+++ /dev/null
@@ -1,169 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-/**
- * Highlights syntax of JavaScript code.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class JsHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected $separators = ["(", ")", "{", "}", "[", "]", ";", ".", ","];
-
-    /**
-     * @inheritDoc
-     */
-    protected $operators = [
-        "=",
-        ">",
-        "<",
-        "!",
-        "~",
-        "?",
-        ":",
-        "==",
-        "<=",
-        ">=",
-        "!=",
-        "&&",
-        "||",
-        "++",
-        "--",
-        "+",
-        "-",
-        "*",
-        "/",
-        "&",
-        "|",
-        "^",
-        "%",
-        "<<",
-        ">>",
-        ">>>",
-        "+=",
-        "-=",
-        "*=",
-        "/=",
-        "&=",
-        "|=",
-        "^=",
-        "%=",
-        "<<=",
-        ">>=",
-        ">>>=",
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords1 = [
-        "String",
-        "Array",
-        "RegExp",
-        "Function",
-        "Math",
-        "Number",
-        "Date",
-        "Image",
-        "window",
-        "document",
-        "navigator",
-        "onAbort",
-        "onBlur",
-        "onChange",
-        "onClick",
-        "onDblClick",
-        "onDragDrop",
-        "onError",
-        "onFocus",
-        "onKeyDown",
-        "onKeyPress",
-        "onKeyUp",
-        "onLoad",
-        "onMouseDown",
-        "onMouseOver",
-        "onMouseOut",
-        "onMouseMove",
-        "onMouseUp",
-        "onMove",
-        "onReset",
-        "onResize",
-        "onSelect",
-        "onSubmit",
-        "onUnload",
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords2 = [
-        "break",
-        "continue",
-        "do",
-        "while",
-        "export",
-        "for",
-        "in",
-        "if",
-        "else",
-        "import",
-        "return",
-        "label",
-        "switch",
-        "case",
-        "var",
-        "with",
-        "delete",
-        "new",
-        "this",
-        "typeof",
-        "void",
-        "abstract",
-        "boolean",
-        "byte",
-        "catch",
-        "char",
-        "class",
-        "const",
-        "debugger",
-        "default",
-        "double",
-        "enum",
-        "extends",
-        "false",
-        "final",
-        "finally",
-        "float",
-        "function",
-        "implements",
-        "goto",
-        "instanceof",
-        "int",
-        "interface",
-        "long",
-        "native",
-        "null",
-        "package",
-        "private",
-        "protected",
-        "public",
-        "short",
-        "static",
-        "super",
-        "synchronized",
-        "throw",
-        "throws",
-        "transient",
-        "true",
-        "try",
-        "volatile",
-    ];
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/PerlHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/PerlHighlighter.class.php
deleted file mode 100644
index 0b373bc6b3..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/PerlHighlighter.class.php
+++ /dev/null
@@ -1,169 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-/**
- * Highlights syntax of Perl sourcecode.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class PerlHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected $separators = ['(', ')', '{', '}', '[', ']', ';', '.', ','];
-
-    /**
-     * @inheritDoc
-     */
-    protected $singleLineComment = ['#'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $commentStart = [];
-
-    /**
-     * @inheritDoc
-     */
-    protected $commentEnd = [];
-
-    /**
-     * @inheritDoc
-     */
-    protected $operators = [
-        '.=',
-        '=',
-        '>',
-        '<',
-        '!',
-        '~',
-        '?',
-        ':',
-        '==',
-        '<=',
-        '>=',
-        '!=',
-        '&&',
-        '||',
-        '++',
-        '--',
-        '+',
-        '-',
-        '*',
-        '/',
-        '&',
-        '|',
-        '^',
-        '%',
-        '<<',
-        '>>',
-        '>>>',
-        '+=',
-        '-=',
-        '*=',
-        '/=',
-        '&=',
-        '|=',
-        '^=',
-        '%=',
-        '<<=',
-        '>>=',
-        '>>>=',
-        '->',
-        '::',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords1 = [
-        'print',
-        'sprintf',
-        'length',
-        'substr',
-        'eval',
-        'die',
-        'opendir',
-        'closedir',
-        'open',
-        'close',
-        'chmod',
-        'unlink',
-        'flock',
-        'read',
-        'seek',
-        'stat',
-        'truncate',
-        'chomp',
-        'localtime',
-        'defined',
-        'undef',
-        'uc',
-        'lc',
-        'trim',
-        'split',
-        'sort',
-        'keys',
-        'push',
-        'pop',
-        'join',
-        'local',
-        'select',
-        'index',
-        'sqrt',
-        'system',
-        'crypt',
-        'pack',
-        'unpack',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords2 = [
-        'case',
-        'do',
-        'while',
-        'for',
-        'if',
-        'foreach',
-        'my',
-        'else',
-        'elsif',
-        'eq',
-        'ne',
-        'or',
-        'xor',
-        'and',
-        'lt',
-        'gt',
-        'ge',
-        'le',
-        'return',
-        'last',
-        'goto',
-        'unless',
-        'given',
-        'when',
-        'default',
-        'until',
-        'break',
-        'exit',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords3 = [
-        'use',
-        'import',
-        'require',
-        'sub',
-    ];
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/PhpHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/PhpHighlighter.class.php
deleted file mode 100644
index 2b23f16764..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/PhpHighlighter.class.php
+++ /dev/null
@@ -1,90 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-use wcf\system\Regex;
-
-/**
- * Highlights syntax of PHP sourcecode.
- *
- * @author  Tim Duesterhus, Marcel Werk
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class PhpHighlighter extends Highlighter
-{
-    public static $colorToClass = [];
-
-    /**
-     * @inheritDoc
-     */
-    protected function init()
-    {
-        parent::init();
-
-        $types = [
-            'default' => 'hlKeywords1',
-            'keyword' => 'hlKeywords2',
-            'comment' => 'hlComments',
-            'string' => 'hlQuotes',
-        ];
-
-        self::$colorToClass['<span style="color: ' . \ini_get('highlight.html') . '">'] = '<span>';
-        foreach ($types as $type => $class) {
-            self::$colorToClass['<span style="color: ' . \ini_get('highlight.' . $type) . '">'] = '<span class="' . $class . '">';
-        }
-    }
-
-    /**
-     * @inheritDoc
-     */
-    public function highlight($string)
-    {
-        // add starting php tag
-        $phpTagsAdded = false;
-        if (!\str_contains($string, '<?')) {
-            $phpTagsAdded = true;
-            $string = '<?php ' . $string . ' ?>';
-        }
-
-        // do highlight
-        $highlightedCode = \highlight_string($string, true);
-
-        // clear code
-        $highlightedCode = \str_replace('<code>', '', $highlightedCode);
-        $highlightedCode = \str_replace('</code>', '', $highlightedCode);
-
-        // remove added php tags
-        if ($phpTagsAdded) {
-            // the opening and closing PHP tags were added previously, hence we actually do
-            // know that the first (last for the closing tag) occurrence is the one inserted
-            // by us. The previously used regex was bad because it was significantly slower
-            // and could easily hit the backtrace limit for larger inputs
-            $openingTag = \mb_strpos($highlightedCode, '&lt;?php&nbsp;');
-            $closingTag = \mb_strrpos($highlightedCode, '?&gt;');
-            $tmp = \mb_substr($highlightedCode, 0, $openingTag);
-            $tmp .= \mb_substr($highlightedCode, $openingTag + 14, $closingTag - $openingTag - 14);
-            $tmp .= \mb_substr($highlightedCode, $closingTag + 5);
-
-            $highlightedCode = $tmp;
-        }
-
-        // remove breaks
-        $highlightedCode = \str_replace("\n", "", $highlightedCode);
-        $highlightedCode = \str_replace('<br />', "\n", $highlightedCode);
-        $highlightedCode = \str_replace('<br>', "\n", $highlightedCode);
-
-        // get tabs back
-        $highlightedCode = \str_replace('&nbsp;&nbsp;&nbsp;&nbsp;', "\t", $highlightedCode);
-        // replace non breaking space with normal space, white-space is preserved by CSS
-        $highlightedCode = \str_replace('&nbsp;', " ", $highlightedCode);
-
-        // convert colors to classes
-        $highlightedCode = \strtr($highlightedCode, self::$colorToClass);
-
-        // replace double quotes by entity
-        return Regex::compile('(?<!\<span class=)"(?!\>)')->replace($highlightedCode, '&quot;');
-    }
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/PlainHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/PlainHighlighter.class.php
deleted file mode 100644
index 33b2b619fc..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/PlainHighlighter.class.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-use wcf\util\StringUtil;
-
-/**
- * Does no highlighting.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class PlainHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    public function highlight($string)
-    {
-        return StringUtil::encodeHTML($string);
-    }
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/PythonHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/PythonHighlighter.class.php
deleted file mode 100644
index 43259135af..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/PythonHighlighter.class.php
+++ /dev/null
@@ -1,148 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-/**
- * Highlights syntax of Python sourcecode.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class PythonHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected $separators = [
-        '(',
-        ')', /* from __future__ import braces '{', '}', */
-        '[',
-        ']',
-        ';',
-        '.',
-        ',',
-        ':',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $singleLineComment = ['#'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $commentStart = [];
-
-    /**
-     * @inheritDoc
-     */
-    protected $commentEnd = [];
-
-    /**
-     * @inheritDoc
-     */
-    protected $operators = [
-        '+=',
-        '-=',
-        '**=',
-        '*=',
-        '//=',
-        '/=',
-        '%=',
-        '~=',
-        '+',
-        '-',
-        '**',
-        '*',
-        '//',
-        '/',
-        '%',
-        '&=',
-        '<<=',
-        '>>=',
-        '^=',
-        '~',
-        '&',
-        '^',
-        '|',
-        '<<',
-        '>>',
-        '=',
-        '!=',
-        '<',
-        '>',
-        '<=',
-        '>=',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $quotes = [["r'", "'"], ["u'", "'"], ['r"', '"'], ['u"', '"'], "'", '"'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords1 = [
-        'print',
-        'del',
-        'str',
-        'int',
-        'len',
-        'repr',
-        'range',
-        'raise',
-        'pass',
-        'continue',
-        'break',
-        'return',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords2 = [
-        'if',
-        'elif',
-        'else',
-        'try',
-        'except',
-        'finally',
-        'for',
-        'in',
-        'while',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords3 = [
-        'from',
-        'import',
-        'as',
-        'class',
-        'def',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords4 = [
-        '__name__',
-        '__init__',
-        '__str__',
-        '__del__',
-        'self',
-        'True',
-        'False',
-        'None',
-        'and',
-        'or',
-        'not',
-        'is',
-    ];
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/SqlHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/SqlHighlighter.class.php
deleted file mode 100644
index 570962999a..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/SqlHighlighter.class.php
+++ /dev/null
@@ -1,468 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-use wcf\util\StringStack;
-use wcf\util\StringUtil;
-
-/**
- * Highlights syntax of sql queries.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class SqlHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected $allowsNewslinesInQuotes = true;
-
-    /**
-     * @inheritDoc
-     */
-    protected $quotes = ["'", '"'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $singleLineComment = ['#', '--'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $separators = ['(', ')', ',', ';'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $operators = [
-        '<>',
-        '~=',
-        '!=',
-        '^=',
-        '=',
-        '<',
-        '<=',
-        '>',
-        '>=',
-        '*',
-        '/',
-        '+',
-        '-',
-        '||',
-        '@',
-        '%',
-        '&',
-        '?',
-        '\$',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected function cacheComments($string)
-    {
-        if ($this->cacheCommentsRegEx !== null) {
-            $string = $this->cacheCommentsRegEx->replace($string, static function (array $matches) {
-                $string = $matches[1];
-                if (isset($matches[2])) {
-                    $comment = $matches[2];
-                } else {
-                    $comment = '';
-                }
-
-                // strip slashes
-                $string = \str_replace("\\\"", "\"", $string);
-                $hash = '';
-                if (!empty($comment)) {
-                    $comment = \str_replace("\\\"", "\"", $comment);
-
-                    // create hash
-                    $hash = StringStack::pushToStringStack(
-                        '<span class="hlComments">' . StringUtil::encodeHTML($comment) . '</span>',
-                        'highlighterComments',
-                        "\0\0"
-                    );
-                }
-
-                return $string . $hash;
-            });
-        }
-
-        return $string;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    protected function cacheQuotes($string)
-    {
-        if ($this->quotesRegEx !== null) {
-            $string = $this->quotesRegEx->replace($string, static function (array $matches) {
-                return StringStack::pushToStringStack(
-                    '<span class="hlQuotes">' . StringUtil::encodeHTML($matches[0]) . '</span>',
-                    'highlighterQuotes',
-                    "\0\0"
-                );
-            });
-        }
-
-        return $string;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords1 = [
-        'action',
-        'add',
-        'aggregate',
-        'all',
-        'alter',
-        'after',
-        'and',
-        'as',
-        'asc',
-        'avg',
-        'avg_row_length',
-        'auto_increment',
-        'between',
-        'bigint',
-        'bit',
-        'binary',
-        'blob',
-        'bool',
-        'both',
-        'by',
-        'cascade',
-        'case',
-        'char',
-        'character',
-        'change',
-        'check',
-        'checksum',
-        'column',
-        'columns',
-        'comment',
-        'constraint',
-        'create',
-        'cross',
-        'current_date',
-        'current_time',
-        'current_timestamp',
-        'data',
-        'database',
-        'databases',
-        'date',
-        'datetime',
-        'day',
-        'day_hour',
-        'day_minute',
-        'day_second',
-        'dayofmonth',
-        'dayofweek',
-        'dayofyear',
-        'dec',
-        'decimal',
-        'default',
-        'delayed',
-        'delay_key_write',
-        'delete',
-        'desc',
-        'describe',
-        'distinct',
-        'distinctrow',
-        'double',
-        'drop',
-        'end',
-        'else',
-        'escape',
-        'escaped',
-        'enclosed',
-        'enum',
-        'explain',
-        'exists',
-        'fields',
-        'file',
-        'first',
-        'float',
-        'float4',
-        'float8',
-        'flush',
-        'foreign',
-        'from',
-        'for',
-        'full',
-        'function',
-        'global',
-        'grant',
-        'grants',
-        'group',
-        'having',
-        'heap',
-        'high_priority',
-        'hour',
-        'hour_minute',
-        'hour_second',
-        'hosts',
-        'identified',
-        'ignore',
-        'in',
-        'index',
-        'infile',
-        'inner',
-        'insert',
-        'insert_id',
-        'int',
-        'integer',
-        'interval',
-        'int1',
-        'int2',
-        'int3',
-        'int4',
-        'int8',
-        'into',
-        'if',
-        'is',
-        'isam',
-        'join',
-        'key',
-        'keys',
-        'kill',
-        'last_insert_id',
-        'leading',
-        'left',
-        'length',
-        'like',
-        'lines',
-        'limit',
-        'load',
-        'local',
-        'lock',
-        'logs',
-        'long',
-        'longblob',
-        'longtext',
-        'low_priority',
-        'max',
-        'max_rows',
-        'match',
-        'mediumblob',
-        'mediumtext',
-        'mediumint',
-        'middleint',
-        'min_rows',
-        'minute',
-        'minute_second',
-        'modify',
-        'month',
-        'monthname',
-        'myisam',
-        'natural',
-        'numeric',
-        'no',
-        'not',
-        'null',
-        'on',
-        'optimize',
-        'option',
-        'optionally',
-        'or',
-        'order',
-        'outer',
-        'outfile',
-        'pack_keys',
-        'partial',
-        'password',
-        'precision',
-        'primary',
-        'procedure',
-        'process',
-        'processlist',
-        'privileges',
-        'read',
-        'real',
-        'references',
-        'reload',
-        'regexp',
-        'rename',
-        'replace',
-        'restrict',
-        'returns',
-        'revoke',
-        'rlike',
-        'row',
-        'rows',
-        'second',
-        'select',
-        'set',
-        'show',
-        'shutdown',
-        'smallint',
-        'soname',
-        'sql_big_tables',
-        'sql_big_selects',
-        'sql_low_priority_updates',
-        'sql_log_off',
-        'sql_log_update',
-        'sql_select_limit',
-        'sql_small_result',
-        'sql_big_result',
-        'sql_warnings',
-        'straight_join',
-        'starting',
-        'status',
-        'string',
-        'table',
-        'tables',
-        'temporary',
-        'terminated',
-        'text',
-        'then',
-        'time',
-        'timestamp',
-        'tinyblob',
-        'tinytext',
-        'tinyint',
-        'trailing',
-        'to',
-        'type',
-        'use',
-        'using',
-        'unique',
-        'unlock',
-        'unsigned',
-        'update',
-        'usage',
-        'values',
-        'varchar',
-        'variables',
-        'varying',
-        'varbinary',
-        'with',
-        'write',
-        'when',
-        'where',
-        'year',
-        'year_month',
-        'zerofill',
-    ];
-
-    /**
-     * @inheritDoc
-     */
-    protected $keywords2 = [
-        'ABS',
-        'ACOS',
-        'ADDDATE',
-        'ASCII',
-        'ASIN',
-        'ATAN',
-        'ATAN2',
-        'AVG',
-        'BENCHMARK',
-        'BIN',
-        'CEILING',
-        'CHAR',
-        'COALESCE',
-        'CONCAT',
-        'CONV',
-        'COS',
-        'COT',
-        'COUNT',
-        'CURDATE',
-        'CURTIME',
-        'DATABASE',
-        'DAYNAME',
-        'DAYOFMONTH',
-        'DAYOFWEEK',
-        'DAYOFYEAR',
-        'DECODE',
-        'DEGREES',
-        'ELT',
-        'ENCODE',
-        'ENCRYPT',
-        'EXP',
-        'EXTRACT',
-        'FIELD',
-        'FLOOR',
-        'FORMAT',
-        'GREATEST',
-        'HEX',
-        'HOUR',
-        'IF',
-        'IFNULL',
-        'INSERT',
-        'INSTR',
-        'INTERVAL',
-        'ISNULL',
-        'LCASE',
-        'LEAST',
-        'LEFT',
-        'LENGTH',
-        'LOCATE',
-        'LOCATE',
-        'LOG',
-        'LOG10',
-        'LOWER',
-        'LPAD',
-        'LTRIM',
-        'MAX',
-        'MD5',
-        'MID',
-        'MIN',
-        'MINUTE',
-        'MOD',
-        'MONTH',
-        'MONTHNAME',
-        'NOW',
-        'NULLIF',
-        'OCT',
-        'ORD',
-        'PASSWORD',
-        'PI',
-        'POSITION',
-        'POW',
-        'POWER',
-        'prepare',
-        'QUARTER',
-        'RADIANS',
-        'RAND',
-        'REPEAT',
-        'REPLACE',
-        'REVERSE',
-        'RIGHT',
-        'ROUND',
-        'ROUND',
-        'RPAD',
-        'RTRIM',
-        'SECOND',
-        'SIGN',
-        'SIN',
-        'SOUNDEX',
-        'SPACE',
-        'SQRT',
-        'STD',
-        'STDDEV',
-        'STRCMP',
-        'SUBDATE',
-        'SUBSTRING',
-        'SUBSTRING',
-        'SUM',
-        'SYSDATE',
-        'TAN',
-        'TRIM',
-        'TRUNCATE',
-        'UCASE',
-        'UPPER',
-        'USER',
-        'VERSION',
-        'WEEK',
-        'WEEKDAY',
-        'YEAR',
-    ];
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/TexHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/TexHighlighter.class.php
deleted file mode 100644
index 79544d0757..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/TexHighlighter.class.php
+++ /dev/null
@@ -1,56 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-use wcf\system\Regex;
-
-/**
- * Highlights syntax of TeX source code.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class TexHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected $quotes = [];
-
-    /**
-     * @inheritDoc
-     */
-    protected $singleLineComment = ['%'];
-
-    /**
-     * @inheritDoc
-     */
-    protected function highlightKeywords($string)
-    {
-        $string = Regex::compile('\\$([^\\$]*)\\$', Regex::DOT_ALL)->replace(
-            $string,
-            '<span class="hlKeywords2">\\0</span>'
-        );
-        $string = Regex::compile(
-            '(\\\\(?:[a-z]+))(\\[[^\\]\\\\]+\\])?(\\{[^\\}]*\\})?',
-            Regex::CASE_INSENSITIVE
-        )->replace(
-            $string,
-            '<span class="hlKeywords3">\\1</span><span class="hlKeywords4">\\2</span><span class="hlKeywords1">\\3</span>'
-        );
-
-        return \str_replace('\\\\', '<span class="hlKeywords3">\\\\</span>', $string);
-    }
-
-    /**
-     * @inheritDoc
-     */
-    protected function highlightNumbers($string)
-    {
-        // do not highlight numbers
-        return $string;
-    }
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/TplHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/TplHighlighter.class.php
deleted file mode 100644
index 969d6bc00e..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/TplHighlighter.class.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-use wcf\system\Regex;
-
-/**
- * Highlights syntax of template documents with smarty-syntax.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class TplHighlighter extends HtmlHighlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected function highlightComments($string)
-    {
-        $string = parent::highlightComments($string);
-
-        // highlight template tags
-        return Regex::compile('\{(?=\S).+?(?<=\S)\}', Regex::DOT_ALL)->replace(
-            $string,
-            '<span class="hlKeywords3">\\0</span>'
-        );
-    }
-}
diff --git a/wcfsetup/install/files/lib/system/bbcode/highlighter/XmlHighlighter.class.php b/wcfsetup/install/files/lib/system/bbcode/highlighter/XmlHighlighter.class.php
deleted file mode 100644
index 3ed8cbf3d0..0000000000
--- a/wcfsetup/install/files/lib/system/bbcode/highlighter/XmlHighlighter.class.php
+++ /dev/null
@@ -1,119 +0,0 @@
-<?php
-
-namespace wcf\system\bbcode\highlighter;
-
-use wcf\system\Regex;
-use wcf\util\StringStack;
-use wcf\util\StringUtil;
-
-/**
- * Highlights syntax of xml sourcecode.
- *
- * @author  Tim Duesterhus
- * @copyright   2001-2019 WoltLab GmbH
- * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
- * @package WoltLabSuite\Core\System\Bbcode\Highlighter
- * @deprecated  since 5.2, use Prism to highlight your code.
- */
-class XmlHighlighter extends Highlighter
-{
-    /**
-     * @inheritDoc
-     */
-    protected $allowsNewslinesInQuotes = true;
-
-    /**
-     * @inheritDoc
-     */
-    protected $quotes = ['"'];
-
-    /**
-     * @inheritDoc
-     */
-    protected $singleLineComment = [];
-
-    /**
-     * @inheritDoc
-     */
-    protected $commentStart = ["<!--"];
-
-    /**
-     * @inheritDoc
-     */
-    protected $commentEnd = ["-->"];
-
-    /**
-     * @inheritDoc
-     */
-    protected $separators = ["<", ">"];
-
-    /**
-     * @inheritDoc
-     */
-    protected $operators = [];
-
-    const XML_ATTRIBUTE_NAME = '[a-z0-9](?:(?:(?<!-)-)?[a-z0-9])*';
-
-    /**
-     * @inheritDoc
-     */
-    protected function highlightKeywords($string)
-    {
-        $string = parent::highlightKeywords($string);
-        // find tags
-        $regex = new Regex(
-            '&lt;(?:/|\!|\?)?[a-z0-9]+(?:\s+' . self::XML_ATTRIBUTE_NAME . '(?:=[^\s/\?&]+)?)*(?:\s+/|\?)?&gt;',
-            Regex::CASE_INSENSITIVE
-        );
-        $string = $regex->replace($string, static function ($matches) {
-            // highlight attributes
-            $tag = Regex::compile(
-                self::XML_ATTRIBUTE_NAME . '(?:=[^\s/\?&]+)?(?=\s|&)',
-                Regex::CASE_INSENSITIVE
-            )->replace($matches[0], '<span class="hlKeywords2">\\0</span>');
-
-            // highlight tag
-            return '<span class="hlKeywords1">' . $tag . '</span>';
-        });
-
-        return $string;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    protected function cacheQuotes($string)
-    {
-        $string = parent::cacheQuotes($string);
-
-        // highlight CDATA-Tags as quotes
-        $string = Regex::compile('<!\[CDATA\[.*?\]\]>', Regex::DOT_ALL)->replace(
-            $string,
-            static function (array $matches) {
-                return StringStack::pushToStringStack(
-                    '<span class="hlQuotes">' . StringUtil::encodeHTML($matches[0]) . '</span>',
-                    'highlighterQuotes'
-                );
-            }
-        );
-
-        return $string;
-    }
-
-    /**
-     * @inheritDoc
-     */
-    protected function highlightQuotes($string)
-    {
-        return StringStack::reinsertStrings(parent::highlightQuotes($string), 'highlighterQuotes');
-    }
-
-    /**
-     * @inheritDoc
-     */
-    protected function highlightNumbers($string)
-    {
-        // do not highlight numbers
-        return $string;
-    }
-}
diff --git a/wcfsetup/install/files/lib/system/cache/builder/BBCodeCacheBuilder.class.php b/wcfsetup/install/files/lib/system/cache/builder/BBCodeCacheBuilder.class.php
index d71c982068..af85a28b09 100644
--- a/wcfsetup/install/files/lib/system/cache/builder/BBCodeCacheBuilder.class.php
+++ b/wcfsetup/install/files/lib/system/cache/builder/BBCodeCacheBuilder.class.php
@@ -22,7 +22,7 @@ class BBCodeCacheBuilder extends AbstractCacheBuilder
     protected function rebuild(array $parameters)
     {
         $attributes = [];
-        $data = ['bbcodes' => [], 'highlighters' => []];
+        $data = ['bbcodes' => []];
 
         // get attributes
         $sql = "SELECT      attribute.*, bbcode.bbcodeTag
@@ -55,16 +55,6 @@ class BBCodeCacheBuilder extends AbstractCacheBuilder
             $data['bbcodes'][$bbcode->bbcodeTag] = $bbcode;
         }
 
-        // get code highlighters
-        $highlighters = \glob(WCF_DIR . 'lib/system/bbcode/highlighter/*.class.php');
-        if (\is_array($highlighters)) {
-            foreach ($highlighters as $highlighter) {
-                if (\preg_match('~\/([a-zA-Z]+)Highlighter\.class\.php$~', $highlighter, $matches)) {
-                    $data['highlighters'][] = \strtolower($matches[1]);
-                }
-            }
-        }
-
         return $data;
     }
 }