1198 lines
33 KiB
PHP
1198 lines
33 KiB
PHP
<?php
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/**
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* Markdownify converts HTML Markup to [Markdown][1] (by [John Gruber][2]. It
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* also supports [Markdown Extra][3] by [Michel Fortin][4] via Markdownify_Extra.
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*
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* It all started as `html2text.php` - a port of [Aaron Swartz'][5] [`html2text.py`][6] - but
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* got a long way since. This is far more than a mere port now!
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* Starting with version 2.0.0 this is a complete rewrite and cannot be
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* compared to Aaron Swatz' `html2text.py` anylonger. I'm now using a HTML parser
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* (see `parsehtml.php` which I also wrote) which makes most of the evil
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* RegEx magic go away and additionally it gives a much cleaner class
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* structure. Also notably is the fact that I now try to prevent regressions by
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* utilizing testcases of Michel Fortin's [MDTest][7].
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*
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* [1]: http://daringfireball.com/projects/markdown
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* [2]: http://daringfireball.com/
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* [3]: http://www.michelf.com/projects/php-markdown/extra/
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* [4]: http://www.michelf.com/
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* [5]: http://www.aaronsw.com/
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* [6]: http://www.aaronsw.com/2002/html2text/
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* [7]: http://article.gmane.org/gmane.text.markdown.general/2540
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*
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* @version 2.0.0 alpha
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* @author Milian Wolff (<mail@milianw.de>, <http://milianw.de>)
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* @license LGPL, see LICENSE_LGPL.txt and the summary below
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* @copyright (C) 2007 Milian Wolff
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* HTML Parser, see http://sf.net/projects/parseHTML
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*/
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require_once dirname(__FILE__).'/parsehtml/parsehtml.php';
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/**
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* default configuration
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*/
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define('MDFY_LINKS_EACH_PARAGRAPH', false);
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define('MDFY_BODYWIDTH', false);
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define('MDFY_KEEPHTML', true);
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/**
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* HTML to Markdown converter class
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*/
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class Markdownify {
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/**
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* html parser object
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*
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* @var parseHTML
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*/
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var $parser;
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/**
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* markdown output
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*
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* @var string
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*/
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var $output;
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/**
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* stack with tags which where not converted to html
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*
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* @var array<string>
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*/
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var $notConverted = array();
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/**
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* skip conversion to markdown
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*
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* @var bool
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*/
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var $skipConversion = false;
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/* options */
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/**
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* keep html tags which cannot be converted to markdown
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*
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* @var bool
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*/
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var $keepHTML = false;
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/**
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* wrap output, set to 0 to skip wrapping
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*
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* @var int
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*/
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var $bodyWidth = 0;
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/**
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* minimum body width
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*
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* @var int
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*/
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var $minBodyWidth = 25;
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/**
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* display links after each paragraph
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*
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* @var bool
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*/
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var $linksAfterEachParagraph = false;
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/**
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* constructor, set options, setup parser
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*
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* @param bool $linksAfterEachParagraph wether or not to flush stacked links after each paragraph
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* defaults to false
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* @param int $bodyWidth wether or not to wrap the output to the given width
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* defaults to false
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* @param bool $keepHTML wether to keep non markdownable HTML or to discard it
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* defaults to true (HTML will be kept)
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* @return void
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*/
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function Markdownify($linksAfterEachParagraph = MDFY_LINKS_EACH_PARAGRAPH, $bodyWidth = MDFY_BODYWIDTH, $keepHTML = MDFY_KEEPHTML) {
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$this->linksAfterEachParagraph = $linksAfterEachParagraph;
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$this->keepHTML = $keepHTML;
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if ($bodyWidth > $this->minBodyWidth) {
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$this->bodyWidth = intval($bodyWidth);
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} else {
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$this->bodyWidth = false;
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}
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$this->parser = new parseHTML;
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$this->parser->noTagsInCode = true;
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# we don't have to do this every time
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$search = array();
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$replace = array();
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foreach ($this->escapeInText as $s => $r) {
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array_push($search, '#(?<!\\\)'.$s.'#U');
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array_push($replace, $r);
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}
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$this->escapeInText = array(
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'search' => $search,
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'replace' => $replace
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);
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}
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/**
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* parse a HTML string
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*
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* @param string $html
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* @return string markdown formatted
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*/
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function parseString($html) {
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$this->parser->html = $html;
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$this->parse();
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return $this->output;
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}
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/**
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* tags with elements which can be handled by markdown
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*
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* @var array<string>
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*/
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var $isMarkdownable = array(
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'p' => array(),
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'ul' => array(),
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'ol' => array(),
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'li' => array(),
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'br' => array(),
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'blockquote' => array(),
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'code' => array(),
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'pre' => array(),
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'a' => array(
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'href' => 'required',
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'title' => 'optional',
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),
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'strong' => array(),
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'b' => array(),
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'em' => array(),
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'i' => array(),
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'img' => array(
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'src' => 'required',
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'alt' => 'optional',
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'title' => 'optional',
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),
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'h1' => array(),
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'h2' => array(),
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'h3' => array(),
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'h4' => array(),
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'h5' => array(),
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'h6' => array(),
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'hr' => array(),
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);
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/**
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* html tags to be ignored (contents will be parsed)
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*
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* @var array<string>
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*/
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var $ignore = array(
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'html',
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'body',
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);
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/**
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* html tags to be dropped (contents will not be parsed!)
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*
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* @var array<string>
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*/
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var $drop = array(
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'script',
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'head',
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'style',
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'form',
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'area',
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'object',
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'param',
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'iframe',
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);
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/**
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* Markdown indents which could be wrapped
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* @note: use strings in regex format
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*
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* @var array<string>
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*/
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var $wrappableIndents = array(
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'\* ', # ul
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'\d. ', # ol
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'\d\d. ', # ol
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'> ', # blockquote
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'', # p
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);
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/**
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* list of chars which have to be escaped in normal text
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* @note: use strings in regex format
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*
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* @var array
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*
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* TODO: what's with block chars / sequences at the beginning of a block?
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*/
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var $escapeInText = array(
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'([-*_])([ ]{0,2}\1){2,}' => '\\\\$0|', # hr
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'\*\*([^*\s]+)\*\*' => '\*\*$1\*\*', # strong
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'\*([^*\s]+)\*' => '\*$1\*', # em
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'__(?! |_)(.+)(?!<_| )__' => '\_\_$1\_\_', # em
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'_(?! |_)(.+)(?!<_| )_' => '\_$1\_', # em
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'`(.+)`' => '\`$1\`', # code
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'\[(.+)\](\s*\()' => '\[$1\]$2', # links: [text] (url) => [text\] (url)
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'\[(.+)\](\s*)\[(.*)\]' => '\[$1\]$2\[$3\]', # links: [text][id] => [text\][id\]
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);
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/**
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* wether last processed node was a block tag or not
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*
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* @var bool
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*/
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var $lastWasBlockTag = false;
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/**
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* name of last closed tag
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*
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* @var string
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*/
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var $lastClosedTag = '';
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/**
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* iterate through the nodes and decide what we
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* shall do with the current node
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*
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* @param void
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* @return void
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*/
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function parse() {
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$this->output = '';
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# drop tags
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$this->parser->html = preg_replace('#<('.implode('|', $this->drop).')[^>]*>.*</\\1>#sU', '', $this->parser->html);
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while ($this->parser->nextNode()) {
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switch ($this->parser->nodeType) {
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case 'doctype':
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break;
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case 'pi':
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case 'comment':
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if ($this->keepHTML) {
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$this->flushLinebreaks();
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$this->out($this->parser->node);
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$this->setLineBreaks(2);
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}
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# else drop
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break;
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case 'text':
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$this->handleText();
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break;
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case 'tag':
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if (in_array($this->parser->tagName, $this->ignore)) {
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break;
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}
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if ($this->parser->isStartTag) {
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$this->flushLinebreaks();
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}
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if ($this->skipConversion) {
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$this->isMarkdownable(); # update notConverted
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$this->handleTagToText();
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continue;
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}
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if (!$this->parser->keepWhitespace && $this->parser->isBlockElement && $this->parser->isStartTag) {
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$this->parser->html = ltrim($this->parser->html);
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}
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if ($this->isMarkdownable()) {
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if ($this->parser->isBlockElement && $this->parser->isStartTag && !$this->lastWasBlockTag && !empty($this->output)) {
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if (!empty($this->buffer)) {
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$str =& $this->buffer[count($this->buffer) -1];
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} else {
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$str =& $this->output;
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}
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if (substr($str, -strlen($this->indent)-1) != "\n".$this->indent) {
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$str .= "\n".$this->indent;
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}
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}
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$func = 'handleTag_'.$this->parser->tagName;
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$this->$func();
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if ($this->linksAfterEachParagraph && $this->parser->isBlockElement && !$this->parser->isStartTag && empty($this->parser->openTags)) {
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$this->flushStacked();
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}
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if (!$this->parser->isStartTag) {
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$this->lastClosedTag = $this->parser->tagName;
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}
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} else {
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$this->handleTagToText();
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$this->lastClosedTag = '';
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}
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break;
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default:
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trigger_error('invalid node type', E_USER_ERROR);
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break;
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}
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$this->lastWasBlockTag = $this->parser->nodeType == 'tag' && $this->parser->isStartTag && $this->parser->isBlockElement;
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}
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if (!empty($this->buffer)) {
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trigger_error('buffer was not flushed, this is a bug. please report!', E_USER_WARNING);
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while (!empty($this->buffer)) {
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$this->out($this->unbuffer());
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}
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}
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### cleanup
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$this->output = rtrim(str_replace('&', '&', str_replace('<', '<', str_replace('>', '>', $this->output))));
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# end parsing, flush stacked tags
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$this->flushStacked();
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$this->stack = array();
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}
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/**
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* check if current tag can be converted to Markdown
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*
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* @param void
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* @return bool
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*/
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function isMarkdownable() {
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if (!isset($this->isMarkdownable[$this->parser->tagName])) {
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# simply not markdownable
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return false;
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}
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if ($this->parser->isStartTag) {
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$return = true;
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if ($this->keepHTML) {
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$diff = array_diff(array_keys($this->parser->tagAttributes), array_keys($this->isMarkdownable[$this->parser->tagName]));
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if (!empty($diff)) {
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# non markdownable attributes given
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$return = false;
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}
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}
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if ($return) {
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foreach ($this->isMarkdownable[$this->parser->tagName] as $attr => $type) {
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if ($type == 'required' && !isset($this->parser->tagAttributes[$attr])) {
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# required markdown attribute not given
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$return = false;
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break;
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}
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}
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}
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if (!$return) {
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array_push($this->notConverted, $this->parser->tagName.'::'.implode('/', $this->parser->openTags));
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}
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return $return;
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} else {
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if (!empty($this->notConverted) && end($this->notConverted) === $this->parser->tagName.'::'.implode('/', $this->parser->openTags)) {
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array_pop($this->notConverted);
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return false;
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}
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return true;
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}
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}
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/**
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* output all stacked tags
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*
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* @param void
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* @return void
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*/
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function flushStacked() {
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# links
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foreach ($this->stack as $tag => $a) {
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if (!empty($a)) {
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call_user_func(array(&$this, 'flushStacked_'.$tag));
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}
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}
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}
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/**
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* output link references (e.g. [1]: http://example.com "title");
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*
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* @param void
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* @return void
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*/
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function flushStacked_a() {
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$out = false;
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foreach ($this->stack['a'] as $k => $tag) {
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if (!isset($tag['unstacked'])) {
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if (!$out) {
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$out = true;
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$this->out("\n\n", true);
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} else {
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$this->out("\n", true);
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}
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$this->out(' ['.$tag['linkID'].']: '.$tag['href'].(isset($tag['title']) ? ' "'.$tag['title'].'"' : ''), true);
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$tag['unstacked'] = true;
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$this->stack['a'][$k] = $tag;
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}
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}
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}
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/**
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* flush enqued linebreaks
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*
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* @param void
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* @return void
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*/
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function flushLinebreaks() {
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if ($this->lineBreaks && !empty($this->output)) {
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$this->out(str_repeat("\n".$this->indent, $this->lineBreaks), true);
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}
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$this->lineBreaks = 0;
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}
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/**
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* handle non Markdownable tags
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*
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* @param void
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* @return void
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*/
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function handleTagToText() {
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if (!$this->keepHTML) {
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if (!$this->parser->isStartTag && $this->parser->isBlockElement) {
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$this->setLineBreaks(2);
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}
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} else {
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# dont convert to markdown inside this tag
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/** TODO: markdown extra **/
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if (!$this->parser->isEmptyTag) {
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if ($this->parser->isStartTag) {
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if (!$this->skipConversion) {
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$this->skipConversion = $this->parser->tagName.'::'.implode('/', $this->parser->openTags);
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}
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} else {
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if ($this->skipConversion == $this->parser->tagName.'::'.implode('/', $this->parser->openTags)) {
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$this->skipConversion = false;
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}
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}
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}
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if ($this->parser->isBlockElement) {
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if ($this->parser->isStartTag) {
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if (in_array($this->parent(), array('ins', 'del'))) {
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# looks like ins or del are block elements now
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$this->out("\n", true);
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$this->indent(' ');
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}
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if ($this->parser->tagName != 'pre') {
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$this->out($this->parser->node."\n".$this->indent);
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if (!$this->parser->isEmptyTag) {
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$this->indent(' ');
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} else {
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$this->setLineBreaks(1);
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}
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$this->parser->html = ltrim($this->parser->html);
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} else {
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# don't indent inside <pre> tags
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$this->out($this->parser->node);
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static $indent;
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$indent = $this->indent;
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$this->indent = '';
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}
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} else {
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if (!$this->parser->keepWhitespace) {
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$this->output = rtrim($this->output);
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}
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if ($this->parser->tagName != 'pre') {
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$this->indent(' ');
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$this->out("\n".$this->indent.$this->parser->node);
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} else {
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# reset indentation
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$this->out($this->parser->node);
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static $indent;
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$this->indent = $indent;
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}
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if (in_array($this->parent(), array('ins', 'del'))) {
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# ins or del was block element
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$this->out("\n");
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$this->indent(' ');
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}
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if ($this->parser->tagName == 'li') {
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$this->setLineBreaks(1);
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} else {
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$this->setLineBreaks(2);
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}
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}
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} else {
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$this->out($this->parser->node);
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}
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if (in_array($this->parser->tagName, array('code', 'pre'))) {
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if ($this->parser->isStartTag) {
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$this->buffer();
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} else {
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# add stuff so cleanup just reverses this
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$this->out(str_replace('<', '&lt;', str_replace('>', '&gt;', $this->unbuffer())));
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}
|
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}
|
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}
|
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}
|
|
/**
|
|
* handle plain text
|
|
*
|
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* @param void
|
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* @return void
|
|
*/
|
|
function handleText() {
|
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if ($this->hasParent('pre') && strpos($this->parser->node, "\n") !== false) {
|
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$this->parser->node = str_replace("\n", "\n".$this->indent, $this->parser->node);
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}
|
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if (!$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;
|
|
}
|
|
|
|
$this->out('['.$buffer.']('.$tag['href'].' "'.$tag['title'].'")', true);
|
|
|
|
/*
|
|
# [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);
|
|
}
|
|
|
|
$this->out('['.$buffer.']['.$tag['linkID'].']', true);
|
|
*/
|
|
}
|
|
}
|
|
/**
|
|
* handle <img /> tags
|
|
*
|
|
* @param void
|
|
* @return void
|
|
*/
|
|
function handleTag_img() {
|
|
if (!$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']);
|
|
}
|
|
|
|
// 
|
|
if ($this->parser->tagAttributes['title'] != "")
|
|
$this->out('!['.$this->parser->tagAttributes['alt'].']('.$this->parser->tagAttributes['src'].' "'.$this->parser->tagAttributes['title'].'")', true);
|
|
else
|
|
$this->out('!['.$this->parser->tagAttributes['alt'].']('.$this->parser->tagAttributes['src'].')', true);
|
|
|
|
/*
|
|
# [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);
|
|
}
|
|
}
|