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<?php |
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/* |
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* This file is part of the league/commonmark package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* |
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* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js) |
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* - (c) John MacFarlane |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace League\CommonMark\Inline\Processor; |
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use League\CommonMark\Delimiter\Delimiter; |
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use League\CommonMark\Delimiter\DelimiterStack; |
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use League\CommonMark\Inline\Element\Emphasis; |
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use League\CommonMark\Inline\Element\Strong; |
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use League\CommonMark\Inline\Element\Text; |
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class EmphasisProcessor implements InlineProcessorInterface |
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{ |
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public function processInlines(DelimiterStack $delimiterStack, Delimiter $stackBottom = null) |
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{ |
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$callback = function (Delimiter $opener, Delimiter $closer, DelimiterStack $stack) { |
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// Calculate actual number of delimiters used from this closer |
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$useDelims = ($closer->getNumDelims() >= 2 && $opener->getNumDelims() >= 2) ? 2 : 1; |
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/** @var Text $openerInline */ |
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$openerInline = $opener->getInlineNode(); |
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/** @var Text $closerInline */ |
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$closerInline = $closer->getInlineNode(); |
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// Remove used delimiters from stack elts and inlines |
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$opener->setNumDelims($opener->getNumDelims() - $useDelims); |
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$closer->setNumDelims($closer->getNumDelims() - $useDelims); |
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$openerInline->setContent(substr($openerInline->getContent(), 0, -$useDelims)); |
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$closerInline->setContent(substr($closerInline->getContent(), 0, -$useDelims)); |
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// Build contents for new emph element |
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if ($useDelims === 1 && $openerInline->data['emphasis_config']->getConfig('enable_em')) { |
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$emph = new Emphasis(); |
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} elseif ($useDelims > 1 && $openerInline->data['emphasis_config']->getConfig('enable_strong')) { |
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$emph = new Strong(); |
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} else { |
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return $closer->getNext(); |
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} |
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$openerInline->insertAfter($emph); |
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while (($node = $emph->next()) !== $closerInline) { |
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$emph->appendChild($node); |
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} |
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// Remove elts btw opener and closer in delimiters stack |
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$tempStack = $closer->getPrevious(); |
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while ($tempStack !== null && $tempStack !== $opener) { |
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$nextStack = $tempStack->getPrevious(); |
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$stack->removeDelimiter($tempStack); |
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$tempStack = $nextStack; |
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} |
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// If opener has 0 delims, remove it and the inline |
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if ($opener->getNumDelims() === 0) { |
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$openerInline->detach(); |
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$stack->removeDelimiter($opener); |
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} |
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if ($closer->getNumDelims() === 0) { |
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$closerInline->detach(); |
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$tempStack = $closer->getNext(); |
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$stack->removeDelimiter($closer); |
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return $tempStack; |
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} |
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return $closer; |
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}; |
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// Process the emphasis characters |
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$delimiterStack->iterateByCharacters(['_', '*'], $callback, $stackBottom); |
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} |
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} |
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