92 lines
1.5 KiB
PHP
92 lines
1.5 KiB
PHP
<?php
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/**
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* @copyright Copyright 2023 Daniel Pimley
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* @license https://github.com/xenocrat/chyrp-markdown/blob/master/LICENSE
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* @link https://github.com/xenocrat/chyrp-markdown#readme
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*/
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namespace xenocrat\markdown\inline;
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/**
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* Adds superscript and subscript inline elements.
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*/
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trait SupSubTrait
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{
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protected function parseSupMarkers(): array
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{
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return array('++');
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}
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/**
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* Parses the superscript feature.
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*
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* @marker ++
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*/
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protected function parseSup($markdown): array
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{
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if (
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preg_match(
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'/^\+\+(?!\+)(.*?[^\+\\\\])\+\+(?!\+)/s',
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$markdown,
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$matches
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)
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) {
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return [
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[
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'sup',
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$this->parseInline($matches[1])
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],
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strlen($matches[0])
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];
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}
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return [['text', $markdown[0] . $markdown[1]], 2];
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}
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protected function renderSup($block): string
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{
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return '<sup>'
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. $this->renderAbsy($block[1])
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. '</sup>';
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}
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protected function parseSubMarkers(): array
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{
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return array('--');
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}
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/**
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* Parses the subscript feature.
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*
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* @marker --
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*/
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protected function parseSub($markdown): array
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{
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if (
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preg_match(
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'/^--(?!-)(.*?[^-\\\\])--(?!-)/s',
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$markdown,
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$matches
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)
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) {
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return [
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[
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'sub',
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$this->parseInline($matches[1])
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],
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strlen($matches[0])
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];
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}
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return [['text', $markdown[0] . $markdown[1]], 2];
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}
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protected function renderSub($block): string
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{
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return '<sub>'
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. $this->renderAbsy($block[1])
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. '</sub>';
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}
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abstract protected function parseInline($text);
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abstract protected function renderAbsy($blocks);
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}
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