public function processInlines(DelimiterStack $delimiterStack, Delimiter $stackBottom = null)
{
$callback = function (Delimiter $opener, Delimiter $closer, DelimiterStack $stack) {
// Calculate actual number of delimiters used from this closer
if ($closer->getNumDelims() < 3 || $opener->getNumDelims() < 3) {
$useDelims = $closer->getNumDelims() <= $opener->getNumDelims() ? $closer->getNumDelims() : $opener->getNumDelims();
} else {
$useDelims = $closer->getNumDelims() % 2 === 0 ? 2 : 1;
}
/** @var Text $openerInline */
$openerInline = $opener->getInlineNode();
/** @var Text $closerInline */
$closerInline = $closer->getInlineNode();
// Remove used delimiters from stack elts and inlines
$opener->setNumDelims($opener->getNumDelims() - $useDelims);
$closer->setNumDelims($closer->getNumDelims() - $useDelims);
$openerInline->setContent(substr($openerInline->getContent(), 0, -$useDelims));
$closerInline->setContent(substr($closerInline->getContent(), 0, -$useDelims));
// Build contents for new emph element
if ($useDelims === 1 && $openerInline->data['emphasis_config']->getConfig('enable_em')) {
$emph = new Emphasis();
} elseif ($useDelims > 1 && $openerInline->data['emphasis_config']->getConfig('enable_strong')) {
$emph = new Strong();
} else {
return $closer->getNext();
}
$openerInline->insertAfter($emph);
while (($node = $emph->next()) !== $closerInline) {
$emph->appendChild($node);
}
// Remove elts btw opener and closer in delimiters stack
$tempStack = $closer->getPrevious();
while ($tempStack !== null && $tempStack !== $opener) {
$nextStack = $tempStack->getPrevious();
$stack->removeDelimiter($tempStack);
$tempStack = $nextStack;
}
// If opener has 0 delims, remove it and the inline
if ($opener->getNumDelims() === 0) {
$openerInline->detach();
$stack->removeDelimiter($opener);
}
if ($closer->getNumDelims() === 0) {
$closerInline->detach();
$tempStack = $closer->getNext();
$stack->removeDelimiter($closer);
return $tempStack;
}
return $closer;
};
// Process the emphasis characters
$delimiterStack->iterateByCharacters(['_', '*'], $callback, $stackBottom);
}
