Markdownify\Converter::parse PHP Метод

    protected function parse()
    {
        $this->output = '';
        // drop tags
        $this->parser->html = preg_replace('#<(' . implode('|', $this->drop) . ')[^>]*>.*</\\1>#sU', '', $this->parser->html);
        while ($this->parser->nextNode()) {
            switch ($this->parser->nodeType) {
                case 'doctype':
                    break;
                case 'pi':
                case 'comment':
                    if ($this->keepHTML) {
                        $this->flushLinebreaks();
                        $this->out($this->parser->node);
                        $this->setLineBreaks(2);
                    }
                    // else drop
                    break;
                case 'text':
                    $this->handleText();
                    break;
                case 'tag':
                    if (in_array($this->parser->tagName, $this->ignore)) {
                        break;
                    }
                    // If the previous tag was not a block element, we simulate a paragraph tag
                    if ($this->parser->isBlockElement && $this->parser->isNextToInlineContext && !in_array($this->parent(), $this->allowMixedChildren)) {
                        $this->setLineBreaks(2);
                    }
                    if ($this->parser->isStartTag) {
                        $this->flushLinebreaks();
                    }
                    if ($this->skipConversion) {
                        $this->isMarkdownable();
                        // update notConverted
                        $this->handleTagToText();
                        continue;
                    }
                    // block elements
                    if (!$this->parser->keepWhitespace && $this->parser->isBlockElement) {
                        $this->fixBlockElementSpacing();
                    }
                    // inline elements
                    if (!$this->parser->keepWhitespace && $this->parser->isInlineContext) {
                        $this->fixInlineElementSpacing();
                    }
                    if ($this->isMarkdownable()) {
                        if ($this->parser->isBlockElement && $this->parser->isStartTag && !$this->lastWasBlockTag && !empty($this->output)) {
                            if (!empty($this->buffer)) {
                                $str =& $this->buffer[count($this->buffer) - 1];
                            } else {
                                $str =& $this->output;
                            }
                            if (substr($str, -strlen($this->indent) - 1) != "\n" . $this->indent) {
                                $str .= "\n" . $this->indent;
                            }
                        }
                        $func = 'handleTag_' . $this->parser->tagName;
                        $this->{$func}();
                        if ($this->linkPosition == self::LINK_AFTER_PARAGRAPH && $this->parser->isBlockElement && !$this->parser->isStartTag && empty($this->parser->openTags)) {
                            $this->flushFootnotes();
                        }
                        if (!$this->parser->isStartTag) {
                            $this->lastClosedTag = $this->parser->tagName;
                        }
                    } else {
                        $this->handleTagToText();
                        $this->lastClosedTag = '';
                    }
                    break;
                default:
                    trigger_error('invalid node type', E_USER_ERROR);
                    break;
            }
            $this->lastWasBlockTag = $this->parser->nodeType == 'tag' && $this->parser->isStartTag && $this->parser->isBlockElement;
        }
        if (!empty($this->buffer)) {
            // trigger_error('buffer was not flushed, this is a bug. please report!', E_USER_WARNING);
            while (!empty($this->buffer)) {
                $this->out($this->unbuffer());
            }
        }
        // cleanup
        $this->output = rtrim(str_replace('&amp;', '&', str_replace('&lt;', '<', str_replace('&gt;', '>', $this->output))));
        // end parsing, flush stacked tags
        $this->flushFootnotes();
        $this->stack = array();
    }