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<?php |
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/** |
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* @copyright 2018 Vladimir Jimenez |
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* @license https://github.com/stakx-io/stakx/blob/master/LICENSE.md MIT |
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*/ |
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namespace allejo\stakx\Markup; |
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use allejo\stakx\RuntimeStatus; |
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use allejo\stakx\Service; |
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use Highlight\Highlighter; |
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use function HighlightUtilities\splitCodeIntoArray; |
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/** |
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* This trait provides functionality for parsing the language names in a consistent manner and providing identical |
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* highlighted HTML across markup engines. |
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* |
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* @since 0.2.1 |
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*/ |
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trait SyntaxHighlighterTrait |
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{ |
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/** @var Highlighter */ |
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protected $highlighter; |
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/** |
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* @since 0.2.1 |
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* |
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* @param string $infoString |
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* @param string $rawCode |
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* |
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* @return string |
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*/ |
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protected function highlightCode($infoString, $rawCode) |
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{ |
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$langDef = $this->parseInfoString($infoString); |
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try |
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{ |
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$highlighted = $this->highlighter->highlight($langDef['language'], $rawCode); |
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$value = $highlighted->value; |
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if (Service::hasRunTimeFlag(RuntimeStatus::USING_LINE_NUMBERS) || count($langDef['selectedLines']) > 0) |
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{ |
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$lines = splitCodeIntoArray($value); |
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$value = ''; |
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foreach ($lines as $i => $line) |
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{ |
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// `$i + 1` since our line numbers are indexed starting at 1 |
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$value .= vsprintf("<div class=\"loc%s\"><span>%s</span></div>\n", [ |
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isset($langDef['selectedLines'][$i + 1]) ? ' highlighted' : '', |
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$line, |
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]); |
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} |
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} |
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return vsprintf('<pre><code class="hljs language-%s">%s</code></pre>', [ |
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$langDef['language'], |
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$value, |
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]); |
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} |
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// Exception thrown when language not supported |
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catch (\DomainException $exception) |
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{ |
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trigger_error("An unsupported language (${langDef['language']}) was detected in a code block", E_USER_WARNING); |
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} |
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catch (\Exception $e) |
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{ |
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trigger_error('An error has occurred in the highlight.php language definition files', E_USER_WARNING); |
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} |
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return $rawCode; |
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} |
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/** |
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* @since 0.2.1 |
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* |
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* @param string $infoString |
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* |
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* @return array |
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*/ |
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private function parseInfoString($infoString) |
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{ |
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$infoString = str_replace('language-', '', $infoString); |
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$definition = [ |
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'language' => $infoString, |
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'selectedLines' => [], |
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]; |
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$bracePos = strpos($infoString, '{'); |
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if ($bracePos === false) |
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{ |
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return $definition; |
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} |
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$definition['language'] = substr($infoString, 0, $bracePos); |
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$lineDefinition = substr($infoString, $bracePos + 1, -1); |
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$lineNumbers = explode(',', $lineDefinition); |
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foreach ($lineNumbers as $lineNumber) |
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{ |
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if (strpos($lineNumber, '-') === false) |
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{ |
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$definition['selectedLines'][intval($lineNumber)] = true; |
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continue; |
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} |
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$extremes = explode('-', $lineNumber); |
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if (count($extremes) !== 2) |
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{ |
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continue; |
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} |
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$start = intval($extremes[0]); |
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$end = intval($extremes[1]); |
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for ($i = $start; $i <= $end; ++$i) |
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{ |
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$definition['selectedLines'][$i] = true; |
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} |
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} |
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return $definition; |
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} |
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} |
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stakx-io /
stakx
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