Html_2_Md::_set_parser() - Code Metrics - Inspection of "Markdown support fix for Patch 1 0 10" - elkarte/Elkarte - Measure and Improve Code Quality continuously with Scrutinizer

Completed
Pull Request — patch_1-0-10 (#2859)

by Stephen
created 2017-02-06 23:25 UTC
Html_2_Md::_set_parser() A

↳ Parent: Html_2_Md
Complexity

Conditions	2
Paths	2
Size

Total Lines	23
Code Lines	11
Duplication

Lines	0
Ratio	0 %
Importance

Changes
Metric	Value
cc	2
eloc	11
nc	2
nop	0
dl	0
loc	23
rs	9.0856
c	0
b	0
f	0
<?php

/**
 * Converts HTML to Markdown text
 *
 * @name      ElkArte Forum
 * @copyright ElkArte Forum contributors
 * @license   BSD http://opensource.org/licenses/BSD-3-Clause
 *
 * @version 1.0.7
 *
 */

if (!defined('ELK'))
	die('No access...');

/**
 * Converts HTML to Markdown text
 */
class Html_2_Md
{
	/**
	 * The value that will hold our dom object
	 * @var object
	 */
	public $doc;

	/**
	 * The value that will hold if we are using the internal or external parser
	 * @var boolean
	 */
	private $_parser;

	/**
	 * Line end character
	 * @var string
	 */
	public $line_end = "\n";

	/**
	 * Line break character
	 * @var string
	 */
	public $line_break = "\n\n";

	/**
	 * Wordwrap output, set to 0 to skip wrapping
	 * @var int
	 */
	public $body_width = 76;

	/**
	 * Strip remaining tags, set to false to leave them in
	 * @var boolean
	 */
	public $strip_tags = true;

	/**
	 * Regex to run on plain text to prevent markdown from erroneously converting
	 * @var string[]
	 */
	private $_textEscapeRegex = array();

	/**
	 * The passed html string to convert
	 * @var string
	 */
	public $html;

	/**
	 * The markdown equivalent to the  html string
	 * @var string
	 */
	public $markdown;

	/**
	 * Gets everything started using the built in or external parser
	 *
	 * @param string $html string of html to convert to MD text
	 */
	public function __construct($html)
	{
		// Up front, remove whitespace between html tags
		$this->html = preg_replace('/(?:(?<=\>)|(?<=\/\>))(\s+)(?=\<\/?)/', '', $html);

		// The XML parser will not deal gracefully with these
		$this->html = strtr($this->html, array(
			'?<' => "|?|&lt",
<?php

$singleQuoted = 'Value';
$doubleQuoted = "\tSingle is $singleQuoted";

print $doubleQuoted;
			'?>' => "|?|&gt",
<?php

$singleQuoted = 'Value';
$doubleQuoted = "\tSingle is $singleQuoted";

print $doubleQuoted;
			'>?' => "&gt|?|",
<?php

$singleQuoted = 'Value';
$doubleQuoted = "\tSingle is $singleQuoted";

print $doubleQuoted;
			'<?' => "&lt|?|"
<?php

$singleQuoted = 'Value';
$doubleQuoted = "\tSingle is $singleQuoted";

print $doubleQuoted;
		));

		// Set the dom parser to use and load the HTML to the parser
		$this->_set_parser();

		// Initialize the regex array to escape text areas so markdown does
		// not interpret plain text as markdown syntax
		$this->_textEscapeRegex = array(

			// Things that may convert to an hr --- or - - - etc
			'([-*_])([ ]{0,2}\1){2,}' => '\\\\$0|',
			// or **stuff** => \*\*stuff\*\*
			'\*\*([^*\s]+)\*\*' => '\*\*$1\*\*',
			// or versions of *italic* __italic__ _italic_
			'\*([^*\s]+)\*' => '\*$1\*',
			'__(?! |_)(.+)(?!<_| )__' => '\_\_$1\_\_',
			'_(?! |_)(.+)(?!<_| )_' => '\_$1\_',
			// nor `code`
			'`(.+)`' => '\`$1\`',
			// or links
			'\[(.+)\](\s*\()' => '\[$1\]$2',
			'\[(.+)\](\s*)\[(.*)\]' => '\[$1\]$2\[$3\]',
		);
	}

	/**
	 * Set the DOM parser for class, loads the supplied HTML
	 */
	private function _set_parser()
	{
		// Using PHP built in functions ...
		if (class_exists('DOMDocument'))
		{
			$this->_parser = true;
			$previous = libxml_use_internal_errors(true);

			// Set up basic parameters for DomDocument, including silencing structural errors
			$this->_setupDOMDocument();

			// Set the error handle back to what it was, and flush
			libxml_use_internal_errors($previous);
			libxml_clear_errors();
		}
		// Or using the external simple html parser
		else
		{
			$this->_parser = false;
			require_once(EXTDIR . '/simple_html_dom.php');
			$this->doc = str_get_html($this->html, true, true, 'UTF-8', false);
		}
	}

	/**
	 * Loads the html body and sends it to the parsing loop to convert all
	 * DOM nodes to markup
	 */
	public function get_markdown()
	{
		// For this html node, find all child elements and convert
		$body = $this->_getBody();
		$this->_convert_childNodes($body);

		// Done replacing HTML elements, now get the converted DOM tree back into a string
		$this->markdown = ($this->_parser) ? $this->doc->saveHTML() : $this->doc->save();

		// Using the internal DOM methods requires we need to do a little extra work
		if ($this->_parser)
		{
			$this->markdown = html_entity_decode(htmlspecialchars_decode($this->markdown, ENT_QUOTES), ENT_QUOTES, 'UTF-8');
		}

		// Clean up any excess spacing etc
		$this->_clean_markdown();

		// Wordwrap?
		if (!empty($this->body_width))
			$this->markdown = $this->_utf8_wordwrap($this->markdown, $this->body_width, $this->line_end);

		return $this->markdown;
	}

	/**
	 * Returns just the body of the HTML, as best possible, so we are not dealing with head
	 * and above head markup
	 *
	 * @return object
	 */
	private function  _getBody()
	{
		// If there is a head node, then off with his head!
		$this->_clipHead();

		// The body of the HTML is where its at.
		if ($this->_parser)
		{
			$body = $this->doc->getElementsByTagName('body')->item(0);
		}
		else
		{
			if ($this->doc->find('body', 0) !== null)
			{
				$body = $this->doc->find('body', 0);
			}
			elseif ($this->doc->find('html', 0) !== null)
			{
				$body = $this->doc->find('html', 0);
			}
			else
			{
				$body = $this->doc->root;
			}
		}

		return $body;
	}

	/**
	 * Remove any <head node from the DOM
	 */
	private function _clipHead()
	{
		$head = ($this->_parser) ? $this->doc->getElementsByTagName('head')->item(0) : $this->doc->find('head', 0)->outertext;
		if ($head !== null)
		{
			if ($this->_parser)
			{
				$head->parentNode->removeChild($head);
			}
			else
			{
				$this->doc->find('head', 0)->outertext = '';
			}
		}
	}

	/**
	 * Sets up processing parameters for DOMDocument to ensure that text is processed as UTF-8
	 */
	private function _setupDOMDocument()
	{
		// If the html is already wrapped, remove it
		$this->html = $this->_returnBodyText($this->html);

		// Set up processing details
		$this->doc = new DOMDocument();
		$this->doc->preserveWhiteSpace = false;
		$this->doc->encoding = 'UTF-8';

		// Do what we can to ensure this is processed as UTF-8
		$this->doc->loadHTML('<?xml encoding="UTF-8"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/></head><body>' . $this->html . '</body></html>');
	}

	/**
	 * Normalize any spacing and excess blank lines that may have been generated
	 */
	private function _clean_markdown()
	{
		// We only want the content, no wrappers
		$this->markdown = $this->_returnBodyText($this->markdown);

		// Remove non breakable spaces that may be hiding in here
		$this->markdown = str_replace("\xC2\xA0\x20", ' ', $this->markdown);
		$this->markdown = str_replace("\xC2\xA0", ' ', $this->markdown);

		// Remove any "bonus" tags
		if ($this->strip_tags)
			$this->markdown = strip_tags($this->markdown);

		// Replace content that we "hide" from the XML parsers
		$this->markdown = strtr($this->markdown, array(
			'|?|&gt' => '?>',
			'|?|&lt' => '?<',
			"&lt|?|" => '<?',
<?php

$singleQuoted = 'Value';
$doubleQuoted = "\tSingle is $singleQuoted";

print $doubleQuoted;
			"&gt|?|" => '>?'
<?php

$singleQuoted = 'Value';
$doubleQuoted = "\tSingle is $singleQuoted";

print $doubleQuoted;
		));

		// Strip the chaff and any excess blank lines we may have produced
		$this->markdown = trim($this->markdown);
		$this->markdown = preg_replace("~(\n(\s)?){3,}~", "\n\n", $this->markdown);
		$this->markdown = preg_replace("~(^\s\s\n){3,}~m", "  \n  \n", $this->markdown);
		$this->markdown = preg_replace("~(^\s\s\r?\n){3,}~m", "  \n  \n", $this->markdown);
		$this->markdown = preg_replace("~(^\s\s(?:\r?\n){2}){3,}~m", "  \n  \n", $this->markdown);
	}

	/**
	 * Looks for the text inside of <body> and then <html>, returning just the inner
	 *
	 * @param $text
	 *
	 * @return string
	 */
	private function _returnBodyText($text)
	{
		if (preg_match('~<body>(.*)</body>~su', $text, $body))
			return $body[1];
		elseif (preg_match('~<html>(.*)</html>~su', $text, $body))
			return $body[1];

		return $text;
	}

	/**
	 * For a given node, checks if it is anywhere nested inside of a code block
	 *  - Prevents converting anything that's inside a code block
	 *
	 * @param object $node
	 * @param boolean $parser flag for internal or external parser
	 */
	private static function _has_parent_code($node, $parser)
	{
		$parent = $parser ? $node->parentNode : $node->parentNode();
		while ($parent)
		{
			if ($parent === null)
				return false;

			// Anywhere nested inside a code block we don't render tags
			$tag = $parser ? $parent->nodeName : $parent->nodeName();
			if ($tag === 'code')
				return true;

			// Back out another level, until we are done
			$parent = $parser ? $parent->parentNode : $parent->parentNode();
		}

		return false;
	}

	/**
	 * Get the nesting level when inside a list
	 *
	 * @param object $node
	 * @param boolean $parser flag for internal or external parser
	 */
	private static function _has_parent_list($node, $parser)
	{
		$inlist = array('ul', 'ol');
		$depth = 0;

		$parent = $parser ? $node->parentNode : $node->parentNode();
		while ($parent)
		{
			// Anywhere nested inside a list we need to get the depth
			$tag = $parser ? $parent->nodeName : $parent->nodeName();
			if (in_array($tag, $inlist))
				$depth++;

			// Back out another level
			$parent = $parser ? $parent->parentNode : $parent->parentNode();
		}

		return $depth;
	}

	/**
	 * Traverse each node to its base, then convert tags to markup on the way back out
	 *
	 * @param object $node
	 */
	private function _convert_childNodes($node)
	{
		if (self::_has_parent_code($node, $this->_parser))
			return;

		// Keep traversing till we are at the base of this node
		if ($node->hasChildNodes())
		{
			$num = $this->_parser ? $node->childNodes->length : count($node->childNodes());
			for ($i = 0; $i < $num; $i++)
			{
				$child = $this->_parser ? $node->childNodes->item($i) : $node->childNodes($i);
				$this->_convert_childNodes($child);
			}
		}

		// At the root of this node, convert it to markdown
		$this->_convert_to_markdown($node);
	}

	/**
	 * Convert the supplied node into its markdown equivalent
	 *  - Supports *some* markdown extra tags, namely: table, abbr & dl in a limited fashion
	 *
	 * @param object $node
	 */
	private function _convert_to_markdown($node)
	{
		// HTML tag we are dealing with
		$tag = $this->_get_name($node);

		// Based on the tag, determine how to convert
		switch ($tag)
		{
			case 'a':
				$markdown = $this->_convert_anchor($node);
				break;
			case 'abbr':
				$markdown = $this->_convert_abbr($node);
				break;
			case 'b':
			case 'strong':
				$markdown = '**' . $this->_get_value($node) . '**';
				break;
			case 'blockquote':
				$markdown = $this->_convert_blockquote($node);
				break;
			case 'br':
				// DomDocument strips empty lines, this prevents that
				$markdown = "\xC2\xA0\xC2\xA0" . $this->line_break;
				break;
			case 'center':
				$markdown = $this->line_end . $this->_get_value($node) . $this->line_end;
				break;
			case 'code':
				$markdown = $this->_convert_code($node);
				break;
			case 'dt':
				$markdown = str_replace(array("\n", "\r", "\n\r"), '', $this->_get_value($node)) . $this->line_end;
				break;
			case 'dd':
				$markdown = ':   ' . $this->_get_value($node) . $this->line_break;
				break;
			case 'dl':
				$markdown = trim($this->_get_value($node)) . $this->line_break;
				break;
			case 'em':
			case 'i':
				$markdown = '_' . $this->_get_value($node) . '_';
				break;
			case 'hr':
				$markdown = $this->line_end . str_repeat('-', 3) . $this->line_end;
				break;
			case 'h1':
			case 'h2':
			case 'h3':
			case 'h4':
			case 'h5':
			case 'h6':
				$markdown = $this->_convert_header($tag, $this->_get_value($node));
				break;
			case 'img':
				$markdown = $this->_convert_image($node);
				break;
			case 'ol':
			case 'ul':
				$markdown = rtrim($this->_get_value($node)) . $this->line_break;
				break;
			case 'li':
				$markdown = $this->_convert_list($node);
				break;
			case 'p':
				if (!$node->hasChildNodes())
				{
					$markdown = str_replace("\n", ' ', $this->_get_value($node)) . $this->line_break;
					$markdown = $this->_escape_text($markdown);
				}
				else
					$markdown = rtrim($this->_get_value($node)) . $this->line_break;
				break;
			case 'pre':
				$markdown = $this->_get_value($node) . $this->line_break;
				break;
			case 'div':
				$markdown = $this->line_end . $this->_get_value($node) . $this->line_end;
				if (!$node->hasChildNodes())
					$markdown = $this->_escape_text($markdown);
				break;
			//case '#text':
			//  $markdown = $this->_escape_text($this->_get_value($node));
			//  break;
			case 'title':
				$markdown = '# ' . $this->_get_value($node) . $this->line_break;
				break;
			case 'table':
				$markdown = $this->_convert_table($node) . $this->line_break;
				break;
			case 'th':
			case 'tr':
			case 'td':
			case 'tbody':
			case 'tfoot':
			case 'thead':
				// Just skip over these as we handle them in the table tag itself
				$markdown = '~`skip`~';
				break;
			case 'root':
			case 'span':
			case 'body':
				// Remove these tags and simply replace with the text inside the tags
				$markdown = $this->_get_innerHTML($node);
				break;
			default:
				// Don't know you or text, so just preserve whats there
				$markdown = $this->_get_outerHTML($node);
		}

		// Replace the node with our markdown replacement, or with the node itself if none was found
		if ($markdown !== '~`skip`~')
		{
			if ($this->_parser)
			{
				// Create a new text node with our markdown tag and replace the original node
				$markdown_node = $this->doc->createTextNode($markdown);
				$node->parentNode->replaceChild($markdown_node, $node);
			}
			else
				$node->outertext = $markdown;
		}
	}

	/**
	 * Converts <abbr> tags to markdown (extra)
	 *
	 * html: <abbr title="Hyper Text Markup Language">HTML</abbr>
	 * md:   *[HTML]: Hyper Text Markup Language
	 *
	 * @param object $node
	 */
	private function _convert_abbr($node)
	{
		$title = $node->getAttribute('title');
		$value = $this->_get_value($node);

		if (!empty($title))
			$markdown = '*[' . $value . ']: ' . $title . $this->line_break;
		else
			$markdown = '';

		return $markdown;
	}

	/**
	 * Converts <a> tags to markdown
	 *
	 * html: <a href='http://somesite.com' title='Title'>Awesome Site</a>
	 * md: [Awesome Site](http://somesite.com 'Title')
	 *
	 * @param object $node
	 * @return string
	 */
	private function _convert_anchor($node)
	{
		global $txt;

		$href = htmlentities($node->getAttribute('href'), ENT_COMPAT, 'UTF-8', false);
		$title = $node->getAttribute('title');
		$class = $node->getAttribute('class');
		$value = $this->_get_value($node);

		// Provide a more compact [name] if none is given
		if ($value == $node->getAttribute('href') || empty($value))
			$value = empty($title) ? $txt['link'] : $title;

		// Special processing just for our own footnotes
		if ($class === 'target' || $class === 'footnote_return')
			$markdown = $value;
		elseif (!empty($title))
			$markdown = '[' . $value . '](' . $href . ' "' . $title . '")';
		else
			$markdown = '[' . $value . '](' . $href . ')';

		// Some links can be very long and if we wrap them they break
		$line_strlen = Util::strlen($markdown);
		if ($line_strlen > $this->body_width)
			$this->body_width = $line_strlen;

		return $markdown;
	}

	/**
	 * Converts blockquotes to markdown > quote style
	 *
	 * html: <blockquote>quote</blockquote>
	 * md: > quote
	 *
	 * @param object $node
	 */
	private function _convert_blockquote($node)
	{
		$markdown = '';

		// All the contents of this block quote
		$value = $this->_get_value($node);
		$value = trim($value);

		// Go line by line
		$lines = preg_split('~\r\n|\r|\n~', $value);

		// Each line gets a '> ' in front of it, just like email quotes really
		foreach ($lines as $line)
			$markdown .= '> ' . ltrim($line, "\t") . $this->line_end;

		$markdown .= $this->line_end;
		return $markdown;
	}

	/**
	 * Converts code tags to markdown span `code` or block code
	 * Converts single line code to inline tick mark
	 * Converts multi line to 4 space indented code
	 *
	 * html: <code>code</code>
	 * md: `code`
	 *
	 * @param object $node
	 */
	private function _convert_code($node)
	{
		$value = $this->_get_innerHTML($node);

		// If we have a multi line code block, we are working outside to in, and need to convert the br's ourselfs
		$value = preg_replace('~<br( /)?' . '>~', "\n", str_replace('&nbsp;', ' ', $value));

		// If there are html tags in this code block, we need to disable strip tags
		// This is NOT the ideal way to handle this, needs something along the lines of preparse and unpreparse.
		if ($this->strip_tags && preg_match('~<[^<]+>~', $value))
			$this->strip_tags = false;

		// Get the number of lines of code that we have
		$lines = preg_split('~\r\n|\r|\n~', $value);
		$total = count($lines);

		// If there's more than one line of code, use leading four space syntax
		if ($total > 1)
		{
			$first_line = trim($lines[0]);
			$last_line = trim($lines[$total - 1]);

			// Remove any leading and trailing blank lines
			if (empty($first_line))
				array_shift($lines);
			if (empty($last_line))
				array_pop($lines);

			// Convert what remains
			$markdown = '';
			foreach ($lines as $line)
			{
				// Adjust the word wrapping since this has code tags, leave it up to
				// the email client to mess these up ;)
				$line_strlen = strlen($line) + 5;
				if ($line_strlen > $this->body_width)
					$this->body_width = $line_strlen;

				$markdown .= str_repeat(' ', 4) . $line . $this->line_end;
			}

			// The parser will encode, but we don't want that for our code block
			if ($this->_parser)
				$markdown = html_entity_decode($markdown, ENT_QUOTES, 'UTF-8');
		}
		// Single line, back tick and move on
		else
		{
			// Account for backticks in the single line code itself
			$ticks = $this->_has_ticks($node, $value);
			if (!empty($ticks))
			{
				// If the ticks were at the start/end of the word space it off
				if ($lines[0][0] == '`' || substr($lines[0], -1) == '`')
					$lines[0] = ' ' . $lines[0] . ' ';

				$markdown = $ticks . ($this->_parser ? html_entity_decode($lines[0], ENT_QUOTES, 'UTF-8') : $lines[0]) . $ticks;
			}
			else
				$markdown = '`' . ($this->_parser ? html_entity_decode($lines[0], ENT_QUOTES, 'UTF-8') : $lines[0]) . '`';
		}

		return $markdown;
	}

	/**
	 * Converts <h1> and <h2> headers to markdown-style headers in setex style,
	 * all other headers are returned as atx style ### h3
	 *
	 * html: <h1>header</h1>
	 * md: header
	 *     ======
	 *
	 * html: <h3>header</h3>
	 * md: ###header
	 *
	 * @param int $level
	 * @param string $content
	 */
	private function _convert_header($level, $content)
	{
		$level = (int) ltrim($level, 'h');

		if ($level < 3)
		{
			$length = Util::strlen($content);
			$underline = ($level === 1) ? '=' : '-';
			$markdown = $content . $this->line_end . str_repeat($underline, $length) . $this->line_break;
		}
		else
			$markdown = str_repeat('#', $level) . ' ' . $content . $this->line_break;

		return $markdown;
	}

	/**
	 * Converts <img> tags to markdown
	 *
	 * html: <img src='source' alt='alt' title='title' />
	 * md: ![alt](source 'title')
	 *
	 * @param object $node
	 */
	private function _convert_image($node)
	{
		$src = $node->getAttribute('src');
		$alt = $node->getAttribute('alt');
		$title = $node->getAttribute('title');

		if (!empty($title))
			$markdown = '![' . $alt . '](' . $src . ' "' . $title . '")';
		else
			$markdown = '![' . $alt . '](' . $src . ')';

		return $markdown;
	}

	/**
	 * Converts ordered <ol> and unordered <ul> lists to markdown syntax
	 *
	 * html: <ul><li>one</li></ul>
	 * md * one
	 *
	 * @param object $node
	 */
	private function _convert_list($node)
	{
		$list_type = $this->_parser ? $node->parentNode->nodeName : $node->parentNode()->nodeName();
		$value = $this->_get_value($node);

		$loose = rtrim($value) !== $value;
		$depth = max(0, $this->_has_parent_list($node, $this->_parser) - 1);

		// Unordered lists get a simple bullet
		if ($list_type === 'ul')
			$markdown = str_repeat("\t", $depth) . '* ' . $value;
		// Ordered lists need a number
		else
		{
			$number = $this->_get_list_position($node);
			$markdown = str_repeat("\t", $depth) . $number . '. ' . $value;
		}

		return $markdown . (!$loose ? $this->line_end : '');
	}

	/**
	 * Converts tables tags to markdown extra table syntax
	 *
	 * - Have to build top down vs normal inside out due to needing col numbers and widths
	 *
	 * @param object $node
	 */
	private function _convert_table($node)
	{
		$table_heading = $node->getElementsByTagName('th');
		if ($this->_get_item($table_heading, 0) === null)
			return;

		$th_parent = ($table_heading) ? ($this->_parser ? $this->_get_item($table_heading, 0)->parentNode->nodeName : $this->_get_item($table_heading, 0)->parentNode()->nodeName()) : false;

		// Set up for a markdown table, then storm the castle
		$align = array();
		$value = array();
		$width = array();
		$max = array();
		$header = array();
		$rows = array();

		// We only markdown well formed tables ...
		if ($table_heading && $th_parent === 'tr')
		{
			// Find out how many columns we are dealing with
			$th_num = $this->_get_length($table_heading);

			for ($col = 0; $col < $th_num; $col++)
			{
				// Get the align and text for each th (html5 this is no longer valid)
				$th = $this->_get_item($table_heading, $col);
				$align_value = ($th !== null) ? strtolower($th->getAttribute('align')) : false;
				$align[0][$col] = $align_value === false ? 'left' : $align_value;
				$value[0][$col] = $this->_get_value($th);
				$width[0][$col] = Util::strlen($this->_get_value($th));

				// Seed the max col width
				$max[$col] = $width[0][$col];
			}

			// Get all of the rows
			$table_rows = $node->getElementsByTagName('tr');
			$num_rows = $this->_get_length($table_rows);
			for ($row = 1; $row < $num_rows; $row++)
			{
				// Start at row 1 and get all of the td's in this row
				$row_data = $this->_get_item($table_rows, $row)->getElementsByTagName('td');

				// Simply use the th count as the number of columns, if its not right its not markdown-able anyway
				for ($col = 0; $col < $th_num; $col++)
				{
					// Get the align and text for each td in this row
					$td = $this->_get_item($row_data, $col);
					$align_value = ($td !== null) ? strtolower($td->getAttribute('align')) : false;
					$align[$row][$col] = $align_value === false ? 'left' : $align_value;
					$value[$row][$col] = $this->_get_value($td);
					$width[$row][$col] = Util::strlen($this->_get_value($td));

					// Keep track of the longest col cell as we go
					if ($width[$row][$col] > $max[$col])
						$max[$col] = $width[$row][$col];
				}
			}

			// Done collecting data, we can rebuild it, we can make it better than it was. Better...stronger...faster
			for ($row = 0; $row < $num_rows; $row++)
			{
				$temp = array();
				for ($col = 0; $col < $th_num; $col++)
				{
					// Build the header row once
					if ($row === 0)
						$header[] = str_repeat('-', $max[$col]);

					// Build the data for each col, align/pad as needed
					$temp[] = $this->_align_row_content($align[$row][$col], $width[$row][$col], $value[$row][$col], $max[$col]);
				}

				// Join it all up so we have a nice looking row
				$rows[] = '| ' . implode(' | ', $temp) . ' |';

				// Stuff in the header after the th row
				if ($row === 0)
					$rows[] = '| ' . implode(' | ', $header) . ' | ';
			}

			// Adjust the word wrapping since this has a table, will get mussed by email anyway
			$line_strlen = strlen($rows[1]) + 2;
			if ($line_strlen > $this->body_width)
				$this->body_width = $line_strlen;

			// Return what we did so it can be swapped in
			return implode($this->line_end, $rows);
		}
	}

	/**
	 * Helper function for getting a node object
	 *
	 * @param object $node
	 * @param int $item
	 */
	private function _get_item($node, $item)
	{
		if ($this->_parser)
			return $node->item($item);
		else
			return $node[$item];
	}

	/**
	 * Helper function for getting a node length
	 *
	 * @param object $node
	 */
	private function _get_length($node)
	{
		if ($this->_parser)
			return $node->length;
		else
			return count($node);
	}

	/**
	 * Helper function for getting a node value
	 *
	 * @param object $node
	 */
	private function _get_value($node)
	{
		if ($node === null)
			return '';

		if ($this->_parser)
			return $node->nodeValue;
		else
			return html_entity_decode(htmlspecialchars_decode($node->innertext, ENT_QUOTES), ENT_QUOTES, 'UTF-8');
	}

	/**
	 * Helper function for getting a node name
	 *
	 * @param object $node
	 */
	private function _get_name($node)
	{
		if ($node === null)
			return '';

		if ($this->_parser)
			return $node->nodeName;
		else
			return $node->nodeName();
	}

	/**
	 * Helper function for creating ol's
	 *
	 * - Returns the absolute number of an <li> inside an <ol>
	 *
	 * @param object $node
	 */
	private function _get_list_position($node)
	{
		$position = 1;

		// Get all of the list nodes inside this parent
		$list_node = $this->_parser ? $node->parentNode : $node->parentNode();
		$total_nodes = $this->_parser ? $node->parentNode->childNodes->length : count($list_node->childNodes());

		// Loop through all li nodes and find where we are in this list
		for ($i = 0; $i < $total_nodes; $i++)
		{
			$current_node = $this->_parser ? $list_node->childNodes->item($i) : $list_node->childNodes($i);
			if ($current_node === $node)
				$position = $i + 1;
		}

		return $position;
	}

	/**
	 * Helper function for table creation
	 *
	 * - Builds td's to a give width, aligned as needed
	 *
	 * @param string $align
	 * @param int $width
	 * @param string $content
	 * @param int $max
	 */
	private function _align_row_content($align, $width, $content, $max)
	{
		switch ($align)
		{
			default:
			case 'left':
				$content .= str_repeat(' ', $max - $width);
				break;
			case 'right':
				$content = str_repeat(' ', $max - $width) . $content;
				break;
			case 'center':
				$paddingNeeded = $max - $width;
				$left = floor($paddingNeeded / 2);
				$right = $paddingNeeded - $left;
				$content = str_repeat(' ', $left) . $content . str_repeat(' ', $right);
				break;
		}

		return $content;
	}

	/**
	 * Gets the inner html of a node
	 *
	 * @param object $node
	 */
	private function _get_innerHTML($node)
	{
		if ($this->_parser)
		{
			$doc = new DOMDocument();
			$doc->appendChild($doc->importNode($node, true));
			$html = trim($doc->saveHTML());
			$tag = $node->nodeName;

			return preg_replace('@^<' . $tag . '[^>]*>|</' . $tag . '>$@', '', $html);
		}
		else
			return $node->innertext;
	}

	/**
	 * Gets the outer html of a node
	 *
	 * @param object $node
	 */
	private function _get_outerHTML($node)
	{
		if ($this->_parser)
		{
			if (version_compare(PHP_VERSION, '5.3.6') >= 0)
				return htmlspecialchars_decode($this->doc->saveHTML($node));
			else
			{
				// @todo remove when 5.3.6 min
				$doc = new DOMDocument();
				$doc->appendChild($doc->importNode($node, true));
				$html = $doc->saveHTML();

				// We just want the html of the inserted node, it *may* be wrapped
				if (preg_match('~<body>(.*)</body>~su', $html, $body))
					$html = $body[1];
				elseif (preg_match('~<html>(.*)</html>~su', $html, $body))
					$html = $body[1];

				// Clean it up
				$html = rtrim($html, "\n");
				return html_entity_decode(htmlspecialchars_decode($html, ENT_QUOTES), ENT_QUOTES, 'UTF-8');
			}
		}
		else
			return $node->outertext;
	}

	/**
	 * Escapes markup looking text in html to prevent accidental assignment
	 *
	 * <p>*stuff*</p> should not convert to *stuff* but \*stuff\* since its not to
	 * be converted by md to html as <strong>stuff</strong>
	 *
	 * @param string $value
	 */
	private function _escape_text($value)
	{
		// Search and replace ...
		foreach ($this->_textEscapeRegex as $regex => $replacement)
			$value = preg_replace('~' . $regex . '~', $replacement, $value);

		return $value;
	}

	/**
	 * If inline code contains backticks ` as part of its content, we need to wrap them so
	 * when markdown is run we don't interpret the ` as additional code blocks
	 *
	 * @param object $node
	 * @param string $value
	 */
	private function _has_ticks($node, $value)
	{
		$ticks = '';
		$code_parent = $this->_parser ? $node->parentNode->nodeName : $node->parentNode()->nodeName();

		// Inside of a pre, we don't do anything
		if ($code_parent === 'pre')
			return $value;

		// If we have backticks in code, then we back tick the ticks
		// e.g. <code>`bla`</code> will become `` `bla` `` so markdown will deal with it properly
		preg_match_all('~`+~', $value, $matches);
		if (!empty($matches[0]))
		{
			// Yup ticks in the hair
			$ticks = '`';
			rsort($matches[0]);

			// Backtick as many as needed so markdown will work
			while (true)
			{
				if (!in_array($ticks, $matches[0]))
					break;
				$ticks .= '`';
			}
		}

		return $ticks;
	}

	/**
	 * Breaks a string up so its no more than width characters long
	 *
	 * - Will break at word boundaries
	 * - If no natural space is found will break mid-word
	 *
	 * @param string $string
	 * @param int $width
	 * @param string $break
	 */
	private function _utf8_wordwrap($string, $width = 75, $break = "\n")
	{
		$strings = explode($break, $string);
		$lines = array();

		foreach ($strings as $string)
		{
			$in_quote = isset($string[0]) && $string[0] === '>';
			while (!empty($string))
			{
				// Get the next #width characters before a break (space, punctuation tab etc)
				if (preg_match('~^(.{1,' . $width . '})(?:\s|$|,|\.)~u', $string, $matches))
				{
					// Add the #width to the output and set up for the next pass
					$lines[] = ($in_quote && $matches[1][0] !== '>' ? '> ' : '') . $matches[1];
					$string = Util::substr($string, Util::strlen($matches[1]));
				}
				// Humm just a long word with no place to break so we simply cut it after width characters
				else
				{
					$lines[] = ($in_quote && $string[0] !== '>' ? '> ' : '') . Util::substr($string, 0, $width);
					$string = Util::substr($string, $width);
				}
			}
		}

		// Join it all the shortened sections up on our break characters
		return implode($break, $lines);
	}
}

elkarte / Elkarte

Pull Request — patch_1-0-10 (#2859)

Html_2_Md::_set_parser() A

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