--- /dev/null
+<?php
+/**
+ * Markdownify converts HTML Markup to [Markdown][1] (by [John Gruber][2]. It
+ * also supports [Markdown Extra][3] by [Michel Fortin][4] via Markdownify_Extra.
+ *
+ * It all started as `html2text.php` - a port of [Aaron Swartz'][5] [`html2text.py`][6] - but
+ * got a long way since. This is far more than a mere port now!
+ * Starting with version 2.0.0 this is a complete rewrite and cannot be
+ * compared to Aaron Swatz' `html2text.py` anylonger. I'm now using a HTML parser
+ * (see `parsehtml.php` which I also wrote) which makes most of the evil
+ * RegEx magic go away and additionally it gives a much cleaner class
+ * structure. Also notably is the fact that I now try to prevent regressions by
+ * utilizing testcases of Michel Fortin's [MDTest][7].
+ *
+ * [1]: http://daringfireball.com/projects/markdown
+ * [2]: http://daringfireball.com/
+ * [3]: http://www.michelf.com/projects/php-markdown/extra/
+ * [4]: http://www.michelf.com/
+ * [5]: http://www.aaronsw.com/
+ * [6]: http://www.aaronsw.com/2002/html2text/
+ * [7]: http://article.gmane.org/gmane.text.markdown.general/2540
+ *
+ * @version 2.0.0 alpha
+ * @author Milian Wolff (<mail@milianw.de>, <http://milianw.de>)
+ * @license LGPL, see LICENSE_LGPL.txt and the summary below
+ * @copyright (C) 2007 Milian Wolff
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * HTML Parser, see http://sf.net/projects/parseHTML
+ */
+require_once dirname(__FILE__) . '/parsehtml/parsehtml.php';
+
+/**
+ * default configuration
+ */
+define('MDFY_LINKS_EACH_PARAGRAPH', false);
+define('MDFY_BODYWIDTH', false);
+define('MDFY_KEEPHTML', true);
+
+/**
+ * HTML to Markdown converter class
+ */
+class Markdownify {
+ /**
+ * html parser object
+ *
+ * @var parseHTML
+ */
+ var $parser;
+ /**
+ * markdown output
+ *
+ * @var string
+ */
+ var $output;
+ /**
+ * stack with tags which where not converted to html
+ *
+ * @var array<string>
+ */
+ var $notConverted = array();
+ /**
+ * skip conversion to markdown
+ *
+ * @var bool
+ */
+ var $skipConversion = false;
+ /* options */
+ /**
+ * keep html tags which cannot be converted to markdown
+ *
+ * @var bool
+ */
+ var $keepHTML = false;
+ /**
+ * wrap output, set to 0 to skip wrapping
+ *
+ * @var int
+ */
+ var $bodyWidth = 0;
+ /**
+ * minimum body width
+ *
+ * @var int
+ */
+ var $minBodyWidth = 25;
+ /**
+ * display links after each paragraph
+ *
+ * @var bool
+ */
+ var $linksAfterEachParagraph = false;
+ /**
+ * constructor, set options, setup parser
+ *
+ * @param bool $linksAfterEachParagraph wether or not to flush stacked links after each paragraph
+ * defaults to false
+ * @param int $bodyWidth wether or not to wrap the output to the given width
+ * defaults to false
+ * @param bool $keepHTML wether to keep non markdownable HTML or to discard it
+ * defaults to true (HTML will be kept)
+ * @return void
+ */
+ function Markdownify($linksAfterEachParagraph = MDFY_LINKS_EACH_PARAGRAPH, $bodyWidth = MDFY_BODYWIDTH, $keepHTML = MDFY_KEEPHTML) {
+ $this->linksAfterEachParagraph = $linksAfterEachParagraph;
+ $this->keepHTML = $keepHTML;
+
+ if ($bodyWidth > $this->minBodyWidth) {
+ $this->bodyWidth = intval($bodyWidth);
+ } else {
+ $this->bodyWidth = false;
+ }
+
+ $this->parser = new parseHTML;
+ $this->parser->noTagsInCode = true;
+
+ # we don't have to do this every time
+ $search = array();
+ $replace = array();
+ foreach ($this->escapeInText as $s => $r) {
+ array_push($search, '#(?<!\\\)'.$s.'#U');
+ array_push($replace, $r);
+ }
+ $this->escapeInText = array(
+ 'search' => $search,
+ 'replace' => $replace
+ );
+ }
+ /**
+ * parse a HTML string
+ *
+ * @param string $html
+ * @return string markdown formatted
+ */
+ function parseString($html) {
+ $this->parser->html = $html;
+ $this->parse();
+ return $this->output;
+ }
+ /**
+ * tags with elements which can be handled by markdown
+ *
+ * @var array<string>
+ */
+ var $isMarkdownable = array(
+ 'p' => array(),
+ 'ul' => array(),
+ 'ol' => array(),
+ 'li' => array(),
+ 'br' => array(),
+ 'blockquote' => array(),
+ 'code' => array(),
+ 'pre' => array(),
+ 'a' => array(
+ 'href' => 'required',
+ 'title' => 'optional',
+ ),
+ 'strong' => array(),
+ 'b' => array(),
+ 'em' => array(),
+ 'i' => array(),
+ 'img' => array(
+ 'src' => 'required',
+ 'alt' => 'optional',
+ 'title' => 'optional',
+ ),
+ 'h1' => array(),
+ 'h2' => array(),
+ 'h3' => array(),
+ 'h4' => array(),
+ 'h5' => array(),
+ 'h6' => array(),
+ 'hr' => array(),
+ );
+ /**
+ * html tags to be ignored (contents will be parsed)
+ *
+ * @var array<string>
+ */
+ var $ignore = array(
+ 'html',
+ 'body',
+ );
+ /**
+ * html tags to be dropped (contents will not be parsed!)
+ *
+ * @var array<string>
+ */
+ var $drop = array(
+ 'script',
+ 'head',
+ 'style',
+ 'form',
+ 'area',
+ 'object',
+ 'param',
+ 'iframe',
+ );
+ /**
+ * Markdown indents which could be wrapped
+ * @note: use strings in regex format
+ *
+ * @var array<string>
+ */
+ var $wrappableIndents = array(
+ '\* ', # ul
+ '\d. ', # ol
+ '\d\d. ', # ol
+ '> ', # blockquote
+ '', # p
+ );
+ /**
+ * list of chars which have to be escaped in normal text
+ * @note: use strings in regex format
+ *
+ * @var array
+ *
+ * TODO: what's with block chars / sequences at the beginning of a block?
+ */
+ var $escapeInText = array(
+ '([-*_])([ ]{0,2}\1){2,}' => '\\\\$0|', # hr
+ '\*\*([^*\s]+)\*\*' => '\*\*$1\*\*', # strong
+ '\*([^*\s]+)\*' => '\*$1\*', # em
+ '__(?! |_)(.+)(?!<_| )__' => '\_\_$1\_\_', # em
+ '_(?! |_)(.+)(?!<_| )_' => '\_$1\_', # em
+ '`(.+)`' => '\`$1\`', # code
+ '\[(.+)\](\s*\()' => '\[$1\]$2', # links: [text] (url) => [text\] (url)
+ '\[(.+)\](\s*)\[(.*)\]' => '\[$1\]$2\[$3\]', # links: [text][id] => [text\][id\]
+ );
+ /**
+ * wether last processed node was a block tag or not
+ *
+ * @var bool
+ */
+ var $lastWasBlockTag = false;
+ /**
+ * name of last closed tag
+ *
+ * @var string
+ */
+ var $lastClosedTag = '';
+ /**
+ * iterate through the nodes and decide what we
+ * shall do with the current node
+ *
+ * @param void
+ * @return void
+ */
+ 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, $this->ignore)) {
+ break;
+ }
+ if ($this->parser->isStartTag) {
+ $this->flushLinebreaks();
+ }
+ if ($this->skipConversion) {
+ $this->isMarkdownable(); # update notConverted
+ $this->handleTagToText();
+ continue;
+ }
+ if (!$this->parser->keepWhitespace && $this->parser->isBlockElement && $this->parser->isStartTag) {
+ $this->parser->html = ltrim($this->parser->html);
+ }
+ 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->linksAfterEachParagraph && $this->parser->isBlockElement && !$this->parser->isStartTag && empty($this->parser->openTags)) {
+ $this->flushStacked();
+ }
+ if (!$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('&', '&', str_replace('<', '<', str_replace('>', '>', $this->output))));
+ # end parsing, flush stacked tags
+ $this->flushStacked();
+ $this->stack = array();
+ }
+ /**
+ * check if current tag can be converted to Markdown
+ *
+ * @param void
+ * @return bool
+ */
+ function isMarkdownable() {
+ if (!isset($this->isMarkdownable[$this->parser->tagName])) {
+ # simply not markdownable
+ return false;
+ }
+ if ($this->parser->isStartTag) {
+ $return = true;
+ if ($this->keepHTML) {
+ $diff = array_diff(array_keys($this->parser->tagAttributes), array_keys($this->isMarkdownable[$this->parser->tagName]));
+ if (!empty($diff)) {
+ # non markdownable attributes given
+ $return = false;
+ }
+ }
+ if ($return) {
+ foreach ($this->isMarkdownable[$this->parser->tagName] as $attr => $type) {
+ if ($type == 'required' && !isset($this->parser->tagAttributes[$attr])) {
+ # required markdown attribute not given
+ $return = false;
+ break;
+ }
+ }
+ }
+ if (!$return) {
+ array_push($this->notConverted, $this->parser->tagName.'::'.implode('/', $this->parser->openTags));
+ }
+ return $return;
+ } else {
+ if (!empty($this->notConverted) && end($this->notConverted) === $this->parser->tagName.'::'.implode('/', $this->parser->openTags)) {
+ array_pop($this->notConverted);
+ return false;
+ }
+ return true;
+ }
+ }
+ /**
+ * output all stacked tags
+ *
+ * @param void
+ * @return void
+ */
+ function flushStacked() {
+ # links
+ foreach ($this->stack as $tag => $a) {
+ if (!empty($a)) {
+ call_user_func(array(&$this, 'flushStacked_'.$tag));
+ }
+ }
+ }
+ /**
+ * output link references (e.g. [1]: http://example.com "title");
+ *
+ * @param void
+ * @return void
+ */
+ function flushStacked_a() {
+ $out = false;
+ foreach ($this->stack['a'] as $k => $tag) {
+ if (!isset($tag['unstacked'])) {
+ if (!$out) {
+ $out = true;
+ $this->out("\n\n", true);
+ } else {
+ $this->out("\n", true);
+ }
+ $this->out(' ['.$tag['linkID'].']: '.$tag['href'].(isset($tag['title']) ? ' "'.$tag['title'].'"' : ''), true);
+ $tag['unstacked'] = true;
+ $this->stack['a'][$k] = $tag;
+ }
+ }
+ }
+ /**
+ * flush enqued linebreaks
+ *
+ * @param void
+ * @return void
+ */
+ function flushLinebreaks() {
+ if ($this->lineBreaks && !empty($this->output)) {
+ $this->out(str_repeat("\n".$this->indent, $this->lineBreaks), true);
+ }
+ $this->lineBreaks = 0;
+ }
+ /**
+ * handle non Markdownable tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTagToText() {
+ if (!$this->keepHTML) {
+ if (!$this->parser->isStartTag && $this->parser->isBlockElement) {
+ $this->setLineBreaks(2);
+ }
+ } else {
+ # dont convert to markdown inside this tag
+ /** TODO: markdown extra **/
+ if (!$this->parser->isEmptyTag) {
+ if ($this->parser->isStartTag) {
+ if (!$this->skipConversion) {
+ $this->skipConversion = $this->parser->tagName.'::'.implode('/', $this->parser->openTags);
+ }
+ } else {
+ if ($this->skipConversion == $this->parser->tagName.'::'.implode('/', $this->parser->openTags)) {
+ $this->skipConversion = false;
+ }
+ }
+ }
+
+ if ($this->parser->isBlockElement) {
+ if ($this->parser->isStartTag) {
+ if (in_array($this->parent(), array('ins', 'del'))) {
+ # looks like ins or del are block elements now
+ $this->out("\n", true);
+ $this->indent(' ');
+ }
+ if ($this->parser->tagName != 'pre') {
+ $this->out($this->parser->node."\n".$this->indent);
+ if (!$this->parser->isEmptyTag) {
+ $this->indent(' ');
+ } else {
+ $this->setLineBreaks(1);
+ }
+ $this->parser->html = ltrim($this->parser->html);
+ } else {
+ # don't indent inside <pre> tags
+ $this->out($this->parser->node);
+ static $indent;
+ $indent = $this->indent;
+ $this->indent = '';
+ }
+ } else {
+ if (!$this->parser->keepWhitespace) {
+ $this->output = rtrim($this->output);
+ }
+ if ($this->parser->tagName != 'pre') {
+ $this->indent(' ');
+ $this->out("\n".$this->indent.$this->parser->node);
+ } else {
+ # reset indentation
+ $this->out($this->parser->node);
+ static $indent;
+ $this->indent = $indent;
+ }
+
+ if (in_array($this->parent(), array('ins', 'del'))) {
+ # ins or del was block element
+ $this->out("\n");
+ $this->indent(' ');
+ }
+ if ($this->parser->tagName == 'li') {
+ $this->setLineBreaks(1);
+ } else {
+ $this->setLineBreaks(2);
+ }
+ }
+ } else {
+ $this->out($this->parser->node);
+ }
+ if (in_array($this->parser->tagName, array('code', 'pre'))) {
+ if ($this->parser->isStartTag) {
+ $this->buffer();
+ } else {
+ # add stuff so cleanup just reverses this
+ $this->out(str_replace('<', '&lt;', str_replace('>', '&gt;', $this->unbuffer())));
+ }
+ }
+ }
+ }
+ /**
+ * handle plain text
+ *
+ * @param void
+ * @return void
+ */
+ function handleText() {
+ if ($this->hasParent('pre') && strpos($this->parser->node, "\n") !== false) {
+ $this->parser->node = str_replace("\n", "\n".$this->indent, $this->parser->node);
+ }
+ if (!$this->hasParent('code') && !$this->hasParent('pre')) {
+ # entity decode
+ $this->parser->node = $this->decode($this->parser->node);
+ if (!$this->skipConversion) {
+ # escape some chars in normal Text
+ $this->parser->node = preg_replace($this->escapeInText['search'], $this->escapeInText['replace'], $this->parser->node);
+ }
+ } else {
+ $this->parser->node = str_replace(array('"', '&apos'), array('"', '\''), $this->parser->node);
+ }
+ $this->out($this->parser->node);
+ $this->lastClosedTag = '';
+ }
+ /**
+ * handle <em> and <i> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_em() {
+ $this->out('*', true);
+ }
+ function handleTag_i() {
+ $this->handleTag_em();
+ }
+ /**
+ * handle <strong> and <b> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_strong() {
+ $this->out('**', true);
+ }
+ function handleTag_b() {
+ $this->handleTag_strong();
+ }
+ /**
+ * handle <h1> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_h1() {
+ $this->handleHeader(1);
+ }
+ /**
+ * handle <h2> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_h2() {
+ $this->handleHeader(2);
+ }
+ /**
+ * handle <h3> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_h3() {
+ $this->handleHeader(3);
+ }
+ /**
+ * handle <h4> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_h4() {
+ $this->handleHeader(4);
+ }
+ /**
+ * handle <h5> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_h5() {
+ $this->handleHeader(5);
+ }
+ /**
+ * handle <h6> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_h6() {
+ $this->handleHeader(6);
+ }
+ /**
+ * number of line breaks before next inline output
+ */
+ var $lineBreaks = 0;
+ /**
+ * handle header tags (<h1> - <h6>)
+ *
+ * @param int $level 1-6
+ * @return void
+ */
+ function handleHeader($level) {
+ if ($this->parser->isStartTag) {
+ $this->out(str_repeat('#', $level).' ', true);
+ } else {
+ $this->setLineBreaks(2);
+ }
+ }
+ /**
+ * handle <p> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_p() {
+ if (!$this->parser->isStartTag) {
+ $this->setLineBreaks(2);
+ }
+ }
+ /**
+ * handle <a> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_a() {
+ if ($this->parser->isStartTag) {
+ $this->buffer();
+ if (isset($this->parser->tagAttributes['title'])) {
+ $this->parser->tagAttributes['title'] = $this->decode($this->parser->tagAttributes['title']);
+ } else {
+ $this->parser->tagAttributes['title'] = null;
+ }
+ $this->parser->tagAttributes['href'] = $this->decode(trim($this->parser->tagAttributes['href']));
+ $this->stack();
+ } else {
+ $tag = $this->unstack();
+ $buffer = $this->unbuffer();
+
+ if (empty($tag['href']) && empty($tag['title'])) {
+ # empty links... testcase mania, who would possibly do anything like that?!
+ $this->out('['.$buffer.']()', true);
+ return;
+ }
+
+ if ($buffer == $tag['href'] && empty($tag['title'])) {
+ # <http://example.com>
+ $this->out('<'.$buffer.'>', true);
+ return;
+ }
+
+ $bufferDecoded = $this->decode(trim($buffer));
+ if (substr($tag['href'], 0, 7) == 'mailto:' && 'mailto:'.$bufferDecoded == $tag['href']) {
+ if (is_null($tag['title'])) {
+ # <mail@example.com>
+ $this->out('<'.$bufferDecoded.'>', true);
+ return;
+ }
+ # [mail@example.com][1]
+ # ...
+ # [1]: mailto:mail@example.com Title
+ $tag['href'] = 'mailto:'.$bufferDecoded;
+ }
+ if ($this->linksAfterEachParagraph!=='inline'){
+ # [This link][id]
+ foreach ($this->stack['a'] as $tag2) {
+ if ($tag2['href'] == $tag['href'] && $tag2['title'] === $tag['title']) {
+ $tag['linkID'] = $tag2['linkID'];
+ break;
+ }
+ }
+ if (!isset($tag['linkID'])) {
+ $tag['linkID'] = count($this->stack['a']) + 1;
+ array_push($this->stack['a'], $tag);
+ }
+
+ $this->out('['.trim($buffer).']['.$tag['linkID'].']', true);
+ }
+ else {
+ # [This link|title](url)
+ if ($tag['title'])
+ $buffer.="|".$tag['title'];
+ $this->out('['.trim($buffer).']('.$tag['href'].')', true);
+ }
+ }
+ }
+ /**
+ * handle <img /> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_img() {
+ if (!$this->parser->isStartTag) {
+ return; # just to be sure this is really an empty tag...
+ }
+
+ if (isset($this->parser->tagAttributes['title'])) {
+ $this->parser->tagAttributes['title'] = $this->decode($this->parser->tagAttributes['title']);
+ } else {
+ $this->parser->tagAttributes['title'] = null;
+ }
+ if (isset($this->parser->tagAttributes['alt'])) {
+ $this->parser->tagAttributes['alt'] = $this->decode($this->parser->tagAttributes['alt']);
+ } else {
+ $this->parser->tagAttributes['alt'] = null;
+ }
+
+ if (empty($this->parser->tagAttributes['src'])) {
+ # support for "empty" images... dunno if this is really needed
+ # but there are some testcases which do that...
+ if (!empty($this->parser->tagAttributes['title'])) {
+ $this->parser->tagAttributes['title'] = ' '.$this->parser->tagAttributes['title'].' ';
+ }
+ $this->out('!['.$this->parser->tagAttributes['alt'].']('.$this->parser->tagAttributes['title'].')', true);
+ return;
+ } else {
+ $this->parser->tagAttributes['src'] = $this->decode($this->parser->tagAttributes['src']);
+ }
+
+ # [This link][id]
+ $link_id = false;
+ if (!empty($this->stack['a'])) {
+ foreach ($this->stack['a'] as $tag) {
+ if ($tag['href'] == $this->parser->tagAttributes['src']
+ && $tag['title'] === $this->parser->tagAttributes['title']) {
+ $link_id = $tag['linkID'];
+ break;
+ }
+ }
+ } else {
+ $this->stack['a'] = array();
+ }
+ if (!$link_id) {
+ $link_id = count($this->stack['a']) + 1;
+ $tag = array(
+ 'href' => $this->parser->tagAttributes['src'],
+ 'linkID' => $link_id,
+ 'title' => $this->parser->tagAttributes['title']
+ );
+ array_push($this->stack['a'], $tag);
+ }
+
+ $this->out('!['.$this->parser->tagAttributes['alt'].']['.$link_id.']', true);
+ }
+ /**
+ * handle <code> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_code() {
+ if ($this->hasParent('pre')) {
+ # ignore code blocks inside <pre>
+ return;
+ }
+ if ($this->parser->isStartTag) {
+ $this->buffer();
+ } else {
+ $buffer = $this->unbuffer();
+ # use as many backticks as needed
+ preg_match_all('#`+#', $buffer, $matches);
+ if (!empty($matches[0])) {
+ rsort($matches[0]);
+
+ $ticks = '`';
+ while (true) {
+ if (!in_array($ticks, $matches[0])) {
+ break;
+ }
+ $ticks .= '`';
+ }
+ } else {
+ $ticks = '`';
+ }
+ if ($buffer[0] == '`' || substr($buffer, -1) == '`') {
+ $buffer = ' '.$buffer.' ';
+ }
+ $this->out($ticks.$buffer.$ticks, true);
+ }
+ }
+ /**
+ * handle <pre> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_pre() {
+ if ($this->keepHTML && $this->parser->isStartTag) {
+ # check if a simple <code> follows
+ if (!preg_match('#^\s*<code\s*>#Us', $this->parser->html)) {
+ # this is no standard markdown code block
+ $this->handleTagToText();
+ return;
+ }
+ }
+ $this->indent(' ');
+ if (!$this->parser->isStartTag) {
+ $this->setLineBreaks(2);
+ } else {
+ $this->parser->html = ltrim($this->parser->html);
+ }
+ }
+ /**
+ * handle <blockquote> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_blockquote() {
+ $this->indent('> ');
+ }
+ /**
+ * handle <ul> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_ul() {
+ if ($this->parser->isStartTag) {
+ $this->stack();
+ if (!$this->keepHTML && $this->lastClosedTag == $this->parser->tagName) {
+ $this->out("\n".$this->indent.'<!-- -->'."\n".$this->indent."\n".$this->indent);
+ }
+ } else {
+ $this->unstack();
+ if ($this->parent() != 'li' || preg_match('#^\s*(</li\s*>\s*<li\s*>\s*)?<(p|blockquote)\s*>#sU', $this->parser->html)) {
+ # dont make Markdown add unneeded paragraphs
+ $this->setLineBreaks(2);
+ }
+ }
+ }
+ /**
+ * handle <ul> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_ol() {
+ # same as above
+ $this->parser->tagAttributes['num'] = 0;
+ $this->handleTag_ul();
+ }
+ /**
+ * handle <li> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_li() {
+ if ($this->parent() == 'ol') {
+ $parent =& $this->getStacked('ol');
+ if ($this->parser->isStartTag) {
+ $parent['num']++;
+ $this->out($parent['num'].'.'.str_repeat(' ', 3 - strlen($parent['num'])), true);
+ }
+ $this->indent(' ', false);
+ } else {
+ if ($this->parser->isStartTag) {
+ $this->out('* ', true);
+ }
+ $this->indent(' ', false);
+ }
+ if (!$this->parser->isStartTag) {
+ $this->setLineBreaks(1);
+ }
+ }
+ /**
+ * handle <hr /> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_hr() {
+ if (!$this->parser->isStartTag) {
+ return; # just to be sure this really is an empty tag
+ }
+ $this->out('* * *', true);
+ $this->setLineBreaks(2);
+ }
+ /**
+ * handle <br /> tags
+ *
+ * @param void
+ * @return void
+ */
+ function handleTag_br() {
+ $this->out(" \n".$this->indent, true);
+ $this->parser->html = ltrim($this->parser->html);
+ }
+ /**
+ * node stack, e.g. for <a> and <abbr> tags
+ *
+ * @var array<array>
+ */
+ var $stack = array();
+ /**
+ * add current node to the stack
+ * this only stores the attributes
+ *
+ * @param void
+ * @return void
+ */
+ function stack() {
+ if (!isset($this->stack[$this->parser->tagName])) {
+ $this->stack[$this->parser->tagName] = array();
+ }
+ array_push($this->stack[$this->parser->tagName], $this->parser->tagAttributes);
+ }
+ /**
+ * remove current tag from stack
+ *
+ * @param void
+ * @return array
+ */
+ function unstack() {
+ if (!isset($this->stack[$this->parser->tagName]) || !is_array($this->stack[$this->parser->tagName])) {
+ trigger_error('Trying to unstack from empty stack. This must not happen.', E_USER_ERROR);
+ }
+ return array_pop($this->stack[$this->parser->tagName]);
+ }
+ /**
+ * get last stacked element of type $tagName
+ *
+ * @param string $tagName
+ * @return array
+ */
+ function & getStacked($tagName) {
+ // no end() so it can be referenced
+ return $this->stack[$tagName][count($this->stack[$tagName])-1];
+ }
+ /**
+ * set number of line breaks before next start tag
+ *
+ * @param int $number
+ * @return void
+ */
+ function setLineBreaks($number) {
+ if ($this->lineBreaks < $number) {
+ $this->lineBreaks = $number;
+ }
+ }
+ /**
+ * stores current buffers
+ *
+ * @var array<string>
+ */
+ var $buffer = array();
+ /**
+ * buffer next parser output until unbuffer() is called
+ *
+ * @param void
+ * @return void
+ */
+ function buffer() {
+ array_push($this->buffer, '');
+ }
+ /**
+ * end current buffer and return buffered output
+ *
+ * @param void
+ * @return string
+ */
+ function unbuffer() {
+ return array_pop($this->buffer);
+ }
+ /**
+ * append string to the correct var, either
+ * directly to $this->output or to the current
+ * buffers
+ *
+ * @param string $put
+ * @return void
+ */
+ function out($put, $nowrap = false) {
+ if (empty($put)) {
+ return;
+ }
+ if (!empty($this->buffer)) {
+ $this->buffer[count($this->buffer) - 1] .= $put;
+ } else {
+ if ($this->bodyWidth && !$this->parser->keepWhitespace) { # wrap lines
+ // get last line
+ $pos = strrpos($this->output, "\n");
+ if ($pos === false) {
+ $line = $this->output;
+ } else {
+ $line = substr($this->output, $pos);
+ }
+
+ if ($nowrap) {
+ if ($put[0] != "\n" && $this->strlen($line) + $this->strlen($put) > $this->bodyWidth) {
+ $this->output .= "\n".$this->indent.$put;
+ } else {
+ $this->output .= $put;
+ }
+ return;
+ } else {
+ $put .= "\n"; # make sure we get all lines in the while below
+ $lineLen = $this->strlen($line);
+ while ($pos = strpos($put, "\n")) {
+ $putLine = substr($put, 0, $pos+1);
+ $put = substr($put, $pos+1);
+ $putLen = $this->strlen($putLine);
+ if ($lineLen + $putLen < $this->bodyWidth) {
+ $this->output .= $putLine;
+ $lineLen = $putLen;
+ } else {
+ $split = preg_split('#^(.{0,'.($this->bodyWidth - $lineLen).'})\b#', $putLine, 2, PREG_SPLIT_OFFSET_CAPTURE | PREG_SPLIT_DELIM_CAPTURE);
+ $this->output .= rtrim($split[1][0])."\n".$this->indent.$this->wordwrap(ltrim($split[2][0]), $this->bodyWidth, "\n".$this->indent, false);
+ }
+ }
+ $this->output = substr($this->output, 0, -1);
+ return;
+ }
+ } else {
+ $this->output .= $put;
+ }
+ }
+ }
+ /**
+ * current indentation
+ *
+ * @var string
+ */
+ var $indent = '';
+ /**
+ * indent next output (start tag) or unindent (end tag)
+ *
+ * @param string $str indentation
+ * @param bool $output add indendation to output
+ * @return void
+ */
+ function indent($str, $output = true) {
+ if ($this->parser->isStartTag) {
+ $this->indent .= $str;
+ if ($output) {
+ $this->out($str, true);
+ }
+ } else {
+ $this->indent = substr($this->indent, 0, -strlen($str));
+ }
+ }
+ /**
+ * decode email addresses
+ *
+ * @author derernst@gmx.ch <http://www.php.net/manual/en/function.html-entity-decode.php#68536>
+ * @author Milian Wolff <http://milianw.de>
+ */
+ function decode($text, $quote_style = ENT_QUOTES) {
+ if (version_compare(PHP_VERSION, '5', '>=')) {
+ # UTF-8 is only supported in PHP 5.x.x and above
+ $text = html_entity_decode($text, $quote_style, 'UTF-8');
+ } else {
+ if (function_exists('html_entity_decode')) {
+ $text = html_entity_decode($text, $quote_style, 'ISO-8859-1');
+ } else {
+ static $trans_tbl;
+ if (!isset($trans_tbl)) {
+ $trans_tbl = array_flip(get_html_translation_table(HTML_ENTITIES, $quote_style));
+ }
+ $text = strtr($text, $trans_tbl);
+ }
+ $text = preg_replace_callback('~&#x([0-9a-f]+);~i', array(&$this, '_decode_hex'), $text);
+ $text = preg_replace_callback('~&#(\d{2,5});~', array(&$this, '_decode_numeric'), $text);
+ }
+ return $text;
+ }
+ /**
+ * callback for decode() which converts a hexadecimal entity to UTF-8
+ *
+ * @param array $matches
+ * @return string UTF-8 encoded
+ */
+ function _decode_hex($matches) {
+ return $this->unichr(hexdec($matches[1]));
+ }
+ /**
+ * callback for decode() which converts a numerical entity to UTF-8
+ *
+ * @param array $matches
+ * @return string UTF-8 encoded
+ */
+ function _decode_numeric($matches) {
+ return $this->unichr($matches[1]);
+ }
+ /**
+ * UTF-8 chr() which supports numeric entities
+ *
+ * @author grey - greywyvern - com <http://www.php.net/manual/en/function.chr.php#55978>
+ * @param array $matches
+ * @return string UTF-8 encoded
+ */
+ function unichr($dec) {
+ if ($dec < 128) {
+ $utf = chr($dec);
+ } else if ($dec < 2048) {
+ $utf = chr(192 + (($dec - ($dec % 64)) / 64));
+ $utf .= chr(128 + ($dec % 64));
+ } else {
+ $utf = chr(224 + (($dec - ($dec % 4096)) / 4096));
+ $utf .= chr(128 + ((($dec % 4096) - ($dec % 64)) / 64));
+ $utf .= chr(128 + ($dec % 64));
+ }
+ return $utf;
+ }
+ /**
+ * UTF-8 strlen()
+ *
+ * @param string $str
+ * @return int
+ *
+ * @author dtorop 932 at hotmail dot com <http://www.php.net/manual/en/function.strlen.php#37975>
+ * @author Milian Wolff <http://milianw.de>
+ */
+ function strlen($str) {
+ if (function_exists('mb_strlen')) {
+ return mb_strlen($str, 'UTF-8');
+ } else {
+ return preg_match_all('/[\x00-\x7F\xC0-\xFD]/', $str, $var_empty);
+ }
+ }
+ /**
+ * wordwrap for utf8 encoded strings
+ *
+ * @param string $str
+ * @param integer $len
+ * @param string $what
+ * @return string
+ */
+ function wordwrap($str, $width, $break, $cut = false){
+ if (!$cut) {
+ $regexp = '#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){1,'.$width.'}\b#';
+ } else {
+ $regexp = '#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){'.$width.'}#';
+ }
+ $return = '';
+ while (preg_match($regexp, $str, $matches)) {
+ $string = $matches[0];
+ $str = ltrim(substr($str, strlen($string)));
+ if (!$cut && isset($str[0]) && in_array($str[0], array('.', '!', ';', ':', '?', ','))) {
+ $string .= $str[0];
+ $str = ltrim(substr($str, 1));
+ }
+ $return .= $string.$break;
+ }
+ return $return.ltrim($str);
+ }
+ /**
+ * check if current node has a $tagName as parent (somewhere, not only the direct parent)
+ *
+ * @param string $tagName
+ * @return bool
+ */
+ function hasParent($tagName) {
+ return in_array($tagName, $this->parser->openTags);
+ }
+ /**
+ * get tagName of direct parent tag
+ *
+ * @param void
+ * @return string $tagName
+ */
+ function parent() {
+ return end($this->parser->openTags);
+ }
+}
\ No newline at end of file
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