League\CommonMark\Inline\Parser\EmphasisParser::parse PHP Method

    public function parse(InlineParserContext $inlineContext)
    {
        $character = $inlineContext->getCursor()->getCharacter();
        if (!in_array($character, $this->getCharacters())) {
            return false;
        }
        $numDelims = 0;
        $cursor = $inlineContext->getCursor();
        $charBefore = $cursor->peek(-1);
        if ($charBefore === null) {
            $charBefore = "\n";
        }
        while ($cursor->peek($numDelims) === $character) {
            ++$numDelims;
        }
        if ($numDelims === 0) {
            return false;
        }
        // Skip single delims if emphasis is disabled
        if ($numDelims === 1 && !$this->config->getConfig('enable_em')) {
            return false;
        }
        $cursor->advanceBy($numDelims);
        $charAfter = $cursor->getCharacter();
        if ($charAfter === null) {
            $charAfter = "\n";
        }
        list($canOpen, $canClose) = $this->determineCanOpenOrClose($charBefore, $charAfter, $character);
        $node = new Text($cursor->getPreviousText(), ['delim' => true, 'emphasis_config' => $this->config]);
        $inlineContext->getContainer()->appendChild($node);
        // Add entry to stack to this opener
        $delimiter = new Delimiter($character, $numDelims, $node, $canOpen, $canClose);
        $inlineContext->getDelimiterStack()->push($delimiter);
        return true;
    }