added parsedown 0.9.0

1 files changed, 1055 insertions, 0 deletions

diff --git a/vendor/parsedown-0.9.0/Parsedown.php b/vendor/parsedown-0.9.0/Parsedown.php
new file mode 100755
index 00000000..1c93fb3a
--- /dev/null
+++ b/vendor/parsedown-0.9.0/Parsedown.php
@@ -0,0 +1,1055 @@
+<?php
+
+#
+#
+# Parsedown
+# http://parsedown.org
+#
+# (c) Emanuil Rusev
+# http://erusev.com
+#
+# For the full license information, please view the LICENSE file that was
+# distributed with this source code.
+#
+#
+
+class Parsedown
+{
+	#
+	# Multiton (http://en.wikipedia.org/wiki/Multiton_pattern)
+	#
+
+	static function instance($name = 'default')
+	{
+		if (isset(self::$instances[$name]))
+			return self::$instances[$name];
+
+		$instance = new Parsedown();
+
+		self::$instances[$name] = $instance;
+
+		return $instance;
+	}
+
+	private static $instances = array();
+
+	#
+	# Setters
+	#
+
+	private $breaks_enabled = false;
+
+	function set_breaks_enabled($breaks_enabled)
+	{
+		$this->breaks_enabled = $breaks_enabled;
+
+		return $this;
+	}
+
+	#
+	# Fields
+	#
+
+	private $reference_map = array();
+
+	#
+	# Public Methods
+	#
+
+	function parse($text)
+	{
+		# removes \r characters
+		$text = str_replace("\r\n", "\n", $text);
+		$text = str_replace("\r", "\n", $text);
+
+		# replaces tabs with spaces
+		$text = str_replace("\t", '    ', $text);
+
+		# ~
+
+		$text = trim($text, "\n");
+
+		$lines = explode("\n", $text);
+
+		$text = $this->parse_block_elements($lines);
+
+		$text = rtrim($text, "\n");
+
+		return $text;
+	}
+
+	#
+	# Private Methods
+	#
+
+	private function parse_block_elements(array $lines, $context = '')
+	{
+		$elements = array();
+
+		$element = array(
+			'type' => '',
+		);
+
+		foreach ($lines as $line)
+		{
+			# fenced elements
+
+			switch ($element['type'])
+			{
+				case 'fenced block':
+
+					if ( ! isset($element['closed']))
+					{
+						if (preg_match('/^[ ]*'.$element['fence'][0].'{3,}[ ]*$/', $line))
+						{
+							$element['closed'] = true;
+						}
+						else
+						{
+							$element['text'] !== '' and $element['text'] .= "\n";
+
+							$element['text'] .= $line;
+						}
+
+						continue 2;
+					}
+
+					break;
+
+				case 'block-level markup':
+
+					if ( ! isset($element['closed']))
+					{
+						if (strpos($line, $element['start']) !== false) # opening tag
+						{
+							$element['depth']++;
+						}
+
+						if (strpos($line, $element['end']) !== false) # closing tag
+						{
+							$element['depth'] > 0
+								? $element['depth']--
+								: $element['closed'] = true;
+						}
+
+						$element['text'] .= "\n".$line;
+
+						continue 2;
+					}
+
+					break;
+			}
+
+			# *
+
+			$deindented_line = ltrim($line);
+
+			if ($deindented_line === '')
+			{
+				$element['interrupted'] = true;
+
+				continue;
+			}
+
+			# composite elements
+
+			switch ($element['type'])
+			{
+				case 'blockquote':
+
+					if ( ! isset($element['interrupted']))
+					{
+						$line = preg_replace('/^[ ]*>[ ]?/', '', $line);
+
+						$element['lines'] []= $line;
+
+						continue 2;
+					}
+
+					break;
+
+				case 'li':
+
+					if (preg_match('/^([ ]{0,3})(\d+[.]|[*+-])[ ](.*)/', $line, $matches))
+					{
+						if ($element['indentation'] !== $matches[1])
+						{
+							$element['lines'] []= $line;
+						}
+						else
+						{
+							unset($element['last']);
+
+							$elements []= $element;
+
+							unset($element['first']);
+
+							$element['last'] = true;
+							$element['lines'] = array(
+								preg_replace('/^[ ]{0,4}/', '', $matches[3]),
+							);
+						}
+
+						continue 2;
+					}
+
+					if (isset($element['interrupted']))
+					{
+						if ($line[0] === ' ')
+						{
+							$element['lines'] []= '';
+
+							$line = preg_replace('/^[ ]{0,4}/', '', $line);
+
+							$element['lines'] []= $line;
+
+							unset($element['interrupted']);
+
+							continue 2;
+						}
+					}
+					else
+					{
+						$line = preg_replace('/^[ ]{0,4}/', '', $line);
+
+						$element['lines'] []= $line;
+
+						continue 2;
+					}
+
+					break;
+			}
+
+			# indentation sensitive types
+
+			switch ($line[0])
+			{
+				case ' ':
+
+					# code block
+
+					if (isset($line[3]) and $line[3] === ' ' and $line[2] === ' ' and $line[1] === ' ')
+					{
+						$code_line = substr($line, 4);
+
+						if ($element['type'] === 'code block')
+						{
+							if (isset($element['interrupted']))
+							{
+								$element['text'] .= "\n";
+
+								unset ($element['interrupted']);
+							}
+
+							$element['text'] .= "\n".$code_line;
+						}
+						else
+						{
+							$elements []= $element;
+
+							$element = array(
+								'type' => 'code block',
+								'text' => $code_line,
+							);
+						}
+
+						continue 2;
+					}
+
+					break;
+
+				case '#':
+
+					# atx heading (#)
+
+					if (isset($line[1]))
+					{
+						$elements []= $element;
+
+						$level = 1;
+
+						while (isset($line[$level]) and $line[$level] === '#')
+						{
+							$level++;
+						}
+
+						$element = array(
+							'type' => 'heading',
+							'text' => trim($line, '# '),
+							'level' => $level,
+						);
+
+						continue 2;
+					}
+
+					break;
+
+				case '-':
+				case '=':
+
+					# setext heading
+
+					if ($element['type'] === 'paragraph' and isset($element['interrupted']) === false)
+					{
+						$chopped_line = rtrim($line);
+
+						$i = 1;
+
+						while (isset($chopped_line[$i]))
+						{
+							if ($chopped_line[$i] !== $line[0])
+							{
+								break 2;
+							}
+
+							$i++;
+						}
+
+						$element['type'] = 'heading';
+						$element['level'] = $line[0] === '-' ? 2 : 1;
+
+						continue 2;
+					}
+
+					break;
+			}
+
+			# indentation insensitive types
+
+			switch ($deindented_line[0])
+			{
+				case '<':
+
+					$position = strpos($deindented_line, '>');
+
+					if ($position > 1) # tag
+					{
+						$name = substr($deindented_line, 1, $position - 1);
+						$name = rtrim($name);
+
+						if (substr($name, -1) === '/')
+						{
+							$self_closing = true;
+
+							$name = substr($name, 0, -1);
+						}
+
+						$position = strpos($name, ' ');
+
+						if ($position)
+						{
+							$name = substr($name, 0, $position);
+						}
+
+						if ( ! ctype_alpha($name))
+						{
+							break;
+						}
+
+						if (in_array($name, $this->inline_tags))
+						{
+							break;
+						}
+
+						$elements []= $element;
+
+						if (isset($self_closing))
+						{
+							$element = array(
+								'type' => 'self-closing tag',
+								'text' => $deindented_line,
+							);
+
+							unset($self_closing);
+
+							continue 2;
+						}
+
+						$element = array(
+							'type' => 'block-level markup',
+							'text' => $deindented_line,
+							'start' => '<'.$name.'>',
+							'end' => '</'.$name.'>',
+							'depth' => 0,
+						);
+
+						if (strpos($deindented_line, $element['end']))
+						{
+							$element['closed'] = true;
+						}
+
+						continue 2;
+					}
+
+					break;
+
+				case '>':
+
+					# quote
+
+					if (preg_match('/^>[ ]?(.*)/', $deindented_line, $matches))
+					{
+						$elements []= $element;
+
+						$element = array(
+							'type' => 'blockquote',
+							'lines' => array(
+								$matches[1],
+							),
+						);
+
+						continue 2;
+					}
+
+					break;
+
+				case '[':
+
+					# reference
+
+					if (preg_match('/^\[(.+?)\]:[ ]*(.+?)(?:[ ]+[\'"](.+?)[\'"])?[ ]*$/', $deindented_line, $matches))
+					{
+						$label = strtolower($matches[1]);
+
+						$this->reference_map[$label] = array(
+							'»' => trim($matches[2], '<>'),
+						);
+
+						if (isset($matches[3]))
+						{
+							$this->reference_map[$label]['#'] = $matches[3];
+						}
+
+						continue 2;
+					}
+
+					break;
+
+				case '`':
+				case '~':
+
+					# fenced code block
+
+					if (preg_match('/^([`]{3,}|[~]{3,})[ ]*(\S+)?[ ]*$/', $deindented_line, $matches))
+					{
+						$elements []= $element;
+
+						$element = array(
+							'type' => 'fenced block',
+							'text' => '',
+							'fence' => $matches[1],
+						);
+
+						isset($matches[2]) and $element['language'] = $matches[2];
+
+						continue 2;
+					}
+
+					break;
+
+				case '*':
+				case '+':
+				case '-':
+				case '_':
+
+					# hr
+
+					if (preg_match('/^([-*_])([ ]{0,2}\1){2,}[ ]*$/', $deindented_line))
+					{
+						$elements []= $element;
+
+						$element = array(
+							'type' => 'hr',
+						);
+
+						continue 2;
+					}
+
+					# li
+
+					if (preg_match('/^([ ]*)[*+-][ ](.*)/', $line, $matches))
+					{
+						$elements []= $element;
+
+						$element = array(
+							'type' => 'li',
+							'ordered' => false,
+							'indentation' => $matches[1],
+							'first' => true,
+							'last' => true,
+							'lines' => array(
+								preg_replace('/^[ ]{0,4}/', '', $matches[2]),
+							),
+						);
+
+						continue 2;
+					}
+			}
+
+			# li
+
+			if ($deindented_line[0] <= '9' and $deindented_line[0] >= '0' and preg_match('/^([ ]*)\d+[.][ ](.*)/', $line, $matches))
+			{
+				$elements []= $element;
+
+				$element = array(
+					'type' => 'li',
+					'ordered' => true,
+					'indentation' => $matches[1],
+					'first' => true,
+					'last' => true,
+					'lines' => array(
+						preg_replace('/^[ ]{0,4}/', '', $matches[2]),
+					),
+				);
+
+				continue;
+			}
+
+			# paragraph
+
+			if ($element['type'] === 'paragraph')
+			{
+				if (isset($element['interrupted']))
+				{
+					$elements []= $element;
+
+					$element['text'] = $line;
+
+					unset($element['interrupted']);
+				}
+				else
+				{
+					$this->breaks_enabled and $element['text'] .= '  ';
+
+					$element['text'] .= "\n".$line;
+				}
+			}
+			else
+			{
+				$elements []= $element;
+
+				$element = array(
+					'type' => 'paragraph',
+					'text' => $line,
+				);
+			}
+		}
+
+		$elements []= $element;
+
+		unset($elements[0]);
+
+		#
+		# ~
+		#
+
+		$markup = '';
+
+		foreach ($elements as $element)
+		{
+			switch ($element['type'])
+			{
+				case 'paragraph':
+
+					$text = $this->parse_span_elements($element['text']);
+
+					if ($context === 'li' and $markup === '')
+					{
+						if (isset($element['interrupted']))
+						{
+							$markup .= "\n".'<p>'.$text.'</p>'."\n";
+						}
+						else
+						{
+							$markup .= $text;
+
+							if (isset($elements[2]))
+							{
+								$markup .= "\n";
+							}
+						}
+					}
+					else
+					{
+						$markup .= '<p>'.$text.'</p>'."\n";
+					}
+
+					break;
+
+				case 'blockquote':
+
+					$text = $this->parse_block_elements($element['lines']);
+
+					$markup .= '<blockquote>'."\n".$text.'</blockquote>'."\n";
+
+					break;
+
+				case 'code block':
+
+					$text = htmlspecialchars($element['text'], ENT_NOQUOTES, 'UTF-8');
+
+					$markup .= '<pre><code>'.$text.'</code></pre>'."\n";
+
+					break;
+
+				case 'fenced block':
+
+					$text = htmlspecialchars($element['text'], ENT_NOQUOTES, 'UTF-8');
+
+					$markup .= '<pre><code';
+
+					isset($element['language']) and $markup .= ' class="language-'.$element['language'].'"';
+
+					$markup .= '>'.$text.'</code></pre>'."\n";
+
+					break;
+
+				case 'heading':
+
+					$text = $this->parse_span_elements($element['text']);
+
+					$markup .= '<h'.$element['level'].'>'.$text.'</h'.$element['level'].'>'."\n";
+
+					break;
+
+				case 'hr':
+
+					$markup .= '<hr />'."\n";
+
+					break;
+
+				case 'li':
+
+					if (isset($element['first']))
+					{
+						$type = $element['ordered'] ? 'ol' : 'ul';
+
+						$markup .= '<'.$type.'>'."\n";
+					}
+
+					if (isset($element['interrupted']) and ! isset($element['last']))
+					{
+						$element['lines'] []= '';
+					}
+
+					$text = $this->parse_block_elements($element['lines'], 'li');
+
+					$markup .= '<li>'.$text.'</li>'."\n";
+
+					if (isset($element['last']))
+					{
+						$type = $element['ordered'] ? 'ol' : 'ul';
+
+						$markup .= '</'.$type.'>'."\n";
+					}
+
+					break;
+
+				case 'block-level markup':
+
+					$markup .= $element['text']."\n";
+
+					break;
+
+				default:
+
+					$markup .= $element['text']."\n";
+			}
+		}
+
+		return $markup;
+	}
+
+	private function parse_span_elements($text, $markers = array("  \n", '![', '&', '*', '<', '[', '\\', '_', '`', 'http', '~~'))
+	{
+		if (isset($text[1]) === false or $markers === array())
+		{
+			return $text;
+		}
+
+		# ~
+
+		$markup = '';
+
+		while ($markers)
+		{
+			$closest_marker = null;
+			$closest_marker_index = 0;
+			$closest_marker_position = null;
+
+			foreach ($markers as $index => $marker)
+			{
+				$marker_position = strpos($text, $marker);
+
+				if ($marker_position === false)
+				{
+					unset($markers[$index]);
+
+					continue;
+				}
+
+				if ($closest_marker === null or $marker_position < $closest_marker_position)
+				{
+					$closest_marker = $marker;
+					$closest_marker_index = $index;
+					$closest_marker_position = $marker_position;
+				}
+			}
+
+			# ~
+
+			if ($closest_marker === null or isset($text[$closest_marker_position + 1]) === false)
+			{
+				$markup .= $text;
+
+				break;
+			}
+			else
+			{
+				$markup .= substr($text, 0, $closest_marker_position);
+			}
+
+			$text = substr($text, $closest_marker_position);
+
+			# ~
+
+			unset($markers[$closest_marker_index]);
+
+			# ~
+
+			switch ($closest_marker)
+			{
+				case "  \n":
+
+					$markup .= '<br />'."\n";
+
+					$offset = 3;
+
+					break;
+
+				case '![':
+				case '[':
+
+					if (strpos($text, ']') and preg_match('/\[((?:[^][]|(?R))*)\]/', $text, $matches))
+					{
+						$element = array(
+							'!' => $text[0] === '!',
+							'a' => $matches[1],
+						);
+
+						$offset = strlen($matches[0]);
+
+						$element['!'] and $offset++;
+
+						$remaining_text = substr($text, $offset);
+
+						if ($remaining_text[0] === '(' and preg_match('/\([ ]*(.*?)(?:[ ]+[\'"](.+?)[\'"])?[ ]*\)/', $remaining_text, $matches))
+						{
+							$element['»'] = $matches[1];
+
+							if (isset($matches[2]))
+							{
+								$element['#'] = $matches[2];
+							}
+
+							$offset += strlen($matches[0]);
+						}
+						elseif ($this->reference_map)
+						{
+							$reference = $element['a'];
+
+							if (preg_match('/^\s*\[(.*?)\]/', $remaining_text, $matches))
+							{
+								$reference = $matches[1] ? $matches[1] : $element['a'];
+
+								$offset += strlen($matches[0]);
+							}
+
+							$reference = strtolower($reference);
+
+							if (isset($this->reference_map[$reference]))
+							{
+								$element['»'] = $this->reference_map[$reference]['»'];
+
+								if (isset($this->reference_map[$reference]['#']))
+								{
+									$element['#'] = $this->reference_map[$reference]['#'];
+								}
+							}
+							else
+							{
+								unset($element);
+							}
+						}
+						else
+						{
+							unset($element);
+						}
+					}
+
+					if (isset($element))
+					{
+						$element['»'] = str_replace('&', '&amp;', $element['»']);
+						$element['»'] = str_replace('<', '&lt;', $element['»']);
+
+						if ($element['!'])
+						{
+							$markup .= '<img alt="'.$element['a'].'" src="'.$element['»'].'"';
+
+							isset($element['#']) and $markup .= ' title="'.$element['#'].'"';
+
+							$markup .= ' />';
+						}
+						else
+						{
+							$element['a'] = $this->parse_span_elements($element['a'], $markers);
+
+							$markup .= '<a href="'.$element['»'].'"';
+
+							isset($element['#']) and $markup .= ' title="'.$element['#'].'"';
+
+							$markup .= '>'.$element['a'].'</a>';
+						}
+
+						unset($element);
+					}
+					else
+					{
+						$markup .= $closest_marker;
+
+						$offset = $closest_marker === '![' ? 2 : 1;
+					}
+
+					break;
+
+				case '&':
+
+					if (preg_match('/^&#?\w+;/', $text, $matches))
+					{
+						$markup .= $matches[0];
+
+						$offset = strlen($matches[0]);
+					}
+					else
+					{
+						$markup .= '&amp;';
+
+						$offset = 1;
+					}
+
+					break;
+
+				case '*':
+				case '_':
+
+					if ($text[1] === $closest_marker and preg_match($this->strong_regex[$closest_marker], $text, $matches))
+					{
+						$matches[1] = $this->parse_span_elements($matches[1], $markers);
+
+						$markup .= '<strong>'.$matches[1].'</strong>';
+					}
+					elseif (preg_match($this->em_regex[$closest_marker], $text, $matches))
+					{
+						$matches[1] = $this->parse_span_elements($matches[1], $markers);
+
+						$markup .= '<em>'.$matches[1].'</em>';
+					}
+					elseif ($text[1] === $closest_marker and preg_match($this->strong_em_regex[$closest_marker], $text, $matches))
+					{
+						$matches[2] = $this->parse_span_elements($matches[2], $markers);
+
+						$matches[1] and $matches[1] = $this->parse_span_elements($matches[1], $markers);
+						$matches[3] and $matches[3] = $this->parse_span_elements($matches[3], $markers);
+
+						$markup .= '<strong>'.$matches[1].'<em>'.$matches[2].'</em>'.$matches[3].'</strong>';
+					}
+					elseif (preg_match($this->em_strong_regex[$closest_marker], $text, $matches))
+					{
+						$matches[2] = $this->parse_span_elements($matches[2], $markers);
+
+						$matches[1] and $matches[1] = $this->parse_span_elements($matches[1], $markers);
+						$matches[3] and $matches[3] = $this->parse_span_elements($matches[3], $markers);
+
+						$markup .= '<em>'.$matches[1].'<strong>'.$matches[2].'</strong>'.$matches[3].'</em>';
+					}
+
+					if (isset($matches) and $matches)
+					{
+						$offset = strlen($matches[0]);
+					}
+					else
+					{
+						$markup .= $closest_marker;
+
+						$offset = 1;
+					}
+
+					break;
+
+				case '<':
+
+					if (strpos($text, '>') !== false)
+					{
+						if ($text[1] === 'h' and preg_match('/^<(https?:[\/]{2}[^\s]+?)>/i', $text, $matches))
+						{
+							$element_url = $matches[1];
+							$element_url = str_replace('&', '&amp;', $element_url);
+							$element_url = str_replace('<', '&lt;', $element_url);
+
+							$markup .= '<a href="'.$element_url.'">'.$element_url.'</a>';
+
+							$offset = strlen($matches[0]);
+						}
+						elseif (strpos($text, '@') > 1 and preg_match('/<(\S+?@\S+?)>/', $text, $matches))
+						{
+							$markup .= '<a href="mailto:'.$matches[1].'">'.$matches[1].'</a>';
+
+							$offset = strlen($matches[0]);
+						}
+						elseif (preg_match('/^<\/?\w.*?>/', $text, $matches))
+						{
+							$markup .= $matches[0];
+
+							$offset = strlen($matches[0]);
+						}
+						else
+						{
+							$markup .= '&lt;';
+
+							$offset = 1;
+						}
+					}
+					else
+					{
+						$markup .= '&lt;';
+
+						$offset = 1;
+					}
+
+					break;
+
+				case '\\':
+
+					if (in_array($text[1], $this->special_characters))
+					{
+						$markup .= $text[1];
+
+						$offset = 2;
+					}
+					else
+					{
+						$markup .= '\\';
+
+						$offset = 1;
+					}
+
+					break;
+
+				case '`':
+
+					if (preg_match('/^(`+)(.+?)\1(?!`)/', $text, $matches))
+					{
+						$element_text = $matches[2];
+						$element_text = htmlspecialchars($element_text, ENT_NOQUOTES, 'UTF-8');
+
+						$markup .= '<code>'.$element_text.'</code>';
+
+						$offset = strlen($matches[0]);
+					}
+					else
+					{
+						$markup .= '`';
+
+						$offset = 1;
+					}
+
+					break;
+
+				case 'http':
+
+					if (preg_match('/^https?:[\/]{2}[^\s]+\b/i', $text, $matches))
+					{
+						$element_url = $matches[0];
+						$element_url = str_replace('&', '&amp;', $element_url);
+						$element_url = str_replace('<', '&lt;', $element_url);
+
+						$markup .= '<a href="'.$element_url.'">'.$element_url.'</a>';
+
+						$offset = strlen($matches[0]);
+					}
+					else
+					{
+						$markup .= 'http';
+
+						$offset = 4;
+					}
+
+					break;
+
+				case '~~':
+
+					if (preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $text, $matches))
+					{
+						$matches[1] = $this->parse_span_elements($matches[1], $markers);
+
+						$markup .= '<del>'.$matches[1].'</del>';
+
+						$offset = strlen($matches[0]);
+					}
+					else
+					{
+						$markup .= '~~';
+
+						$offset = 2;
+					}
+
+					break;
+			}
+
+			if (isset($offset))
+			{
+				$text = substr($text, $offset);
+			}
+
+			$markers[$closest_marker_index] = $closest_marker;
+		}
+
+		return $markup;
+	}
+
+	#
+	# Read-only
+	#
+
+	private $inline_tags = array(
+		'a', 'abbr', 'acronym', 'b', 'bdo', 'big', 'br', 'button',
+		'cite', 'code', 'dfn', 'em', 'i', 'img', 'input', 'kbd',
+		'label', 'map', 'object', 'q', 'samp', 'script', 'select', 'small',
+		'span', 'strong', 'sub', 'sup', 'textarea', 'tt', 'var',
+	);
+
+	private $special_characters = array('\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!');
+
+	# ~
+
+	private $strong_regex = array(
+		'*' => '/^[*]{2}([^*]+?)[*]{2}(?![*])/s',
+		'_' => '/^__([^_]+?)__(?!_)/s',
+	);
+
+	private $em_regex = array(
+		'*' => '/^[*]([^*]+?)[*](?![*])/s',
+		'_' => '/^_([^_]+?)[_](?![_])\b/s',
+	);
+
+	private $strong_em_regex = array(
+		'*' => '/^[*]{2}(.*?)[*](.+?)[*](.*?)[*]{2}/s',
+		'_' => '/^__(.*?)_(.+?)_(.*?)__/s',
+	);
+
+	private $em_strong_regex = array(
+		'*' => '/^[*](.*?)[*]{2}(.+?)[*]{2}(.*?)[*]/s',
+		'_' => '/^_(.*?)__(.+?)__(.*?)_/s',
+	);
+}
\ No newline at end of file