From c459bded53dc763e154f91e63e8380840c3d662f Mon Sep 17 00:00:00 2001 From: Mikael Nordfeldth Date: Thu, 28 Jan 2016 14:29:24 +0100 Subject: [PATCH] Markdown library updated to 1.6.0, merge req !90 Thanks postblue --- extlib/Michelf/Markdown.php | 1689 ++------------------------ extlib/Michelf/MarkdownExtra.php | 1621 +++++++++++++++++++++++- extlib/Michelf/MarkdownInterface.php | 6 +- extlib/PHP_Markdown_License.text | 36 - 4 files changed, 1684 insertions(+), 1668 deletions(-) delete mode 100644 extlib/PHP_Markdown_License.text diff --git a/extlib/Michelf/Markdown.php b/extlib/Michelf/Markdown.php index c8ced899c6..68bb5587e1 100644 --- a/extlib/Michelf/Markdown.php +++ b/extlib/Michelf/Markdown.php @@ -3,12 +3,12 @@ # Markdown - A text-to-HTML conversion tool for web writers # # PHP Markdown -# Copyright (c) 2004-2014 Michel Fortin -# +# Copyright (c) 2004-2015 Michel Fortin +# # # Original Markdown # Copyright (c) 2004-2006 John Gruber -# +# # namespace Michelf; @@ -21,7 +21,7 @@ class Markdown implements MarkdownInterface { ### Version ### - const MARKDOWNLIB_VERSION = "1.4.1"; + const MARKDOWNLIB_VERSION = "1.6.0"; ### Simple Function Interface ### @@ -62,6 +62,24 @@ class Markdown implements MarkdownInterface { # Optional filter function for URLs public $url_filter_func = null; + # Optional header id="" generation callback function. + public $header_id_func = null; + + # Optional function for converting code block content to HTML + public $code_block_content_func = null; + + # Class attribute to toggle "enhanced ordered list" behaviour + # setting this to true will allow ordered lists to start from the index + # number that is defined first. For example: + # 2. List item two + # 3. List item three + # + # becomes + #
    + #
  1. List item two
    2. + #
  2. List item three
    3. + #
+ public $enhanced_ordered_list = false; ### Parser Implementation ### @@ -478,7 +496,7 @@ class Markdown implements MarkdownInterface { "doImages" => 10, "doAnchors" => 20, - # Make links out of things like `` + # Make links out of things like `` # Must come after doAnchors, because you can use < and > # delimiters in inline links like [this](). "doAutoLinks" => 30, @@ -773,21 +791,46 @@ class Markdown implements MarkdownInterface { return $text; } + protected function _doHeaders_callback_setext($matches) { # Terrible hack to check we haven't found an empty list item. if ($matches[2] == '-' && preg_match('{^-(?: |$)}', $matches[1])) return $matches[0]; $level = $matches[2]{0} == '=' ? 1 : 2; - $block = "".$this->runSpanGamut($matches[1]).""; + + # id attribute generation + $idAtt = $this->_generateIdFromHeaderValue($matches[1]); + + $block = "".$this->runSpanGamut($matches[1]).""; return "\n" . $this->hashBlock($block) . "\n\n"; } protected function _doHeaders_callback_atx($matches) { + + # id attribute generation + $idAtt = $this->_generateIdFromHeaderValue($matches[2]); + $level = strlen($matches[1]); - $block = "".$this->runSpanGamut($matches[2]).""; + $block = "".$this->runSpanGamut($matches[2]).""; return "\n" . $this->hashBlock($block) . "\n\n"; } + protected function _generateIdFromHeaderValue($headerValue) { + + # if a header_id_func property is set, we can use it to automatically + # generate an id attribute. + # + # This method returns a string in the form id="foo", or an empty string + # otherwise. + if (!is_callable($this->header_id_func)) { + return ""; + } + $idValue = call_user_func($this->header_id_func, $headerValue); + if (!$idValue) return ""; + + return ' id="' . $this->encodeAttribute($idValue) . '"'; + + } protected function doLists($text) { # @@ -859,16 +902,33 @@ class Markdown implements MarkdownInterface { $marker_ul_re = '[*+-]'; $marker_ol_re = '\d+[\.]'; $marker_any_re = "(?:$marker_ul_re|$marker_ol_re)"; - + $marker_ol_start_re = '[0-9]+'; + $list = $matches[1]; $list_type = preg_match("/$marker_ul_re/", $matches[4]) ? "ul" : "ol"; - + $marker_any_re = ( $list_type == "ul" ? $marker_ul_re : $marker_ol_re ); - + $list .= "\n"; $result = $this->processListItems($list, $marker_any_re); - - $result = $this->hashBlock("<$list_type>\n" . $result . ""); + + $ol_start = 1; + if ($this->enhanced_ordered_list) { + # Get the start number for ordered list. + if ($list_type == 'ol') { + $ol_start_array = array(); + $ol_start_check = preg_match("/$marker_ol_start_re/", $matches[4], $ol_start_array); + if ($ol_start_check){ + $ol_start = $ol_start_array[0]; + } + } + } + + if ($ol_start > 1 && $list_type == 'ol'){ + $result = $this->hashBlock("<$list_type start=\"$ol_start\">\n" . $result . ""); + } else { + $result = $this->hashBlock("<$list_type>\n" . $result . ""); + } return "\n". $result ."\n\n"; } @@ -967,7 +1027,11 @@ class Markdown implements MarkdownInterface { $codeblock = $matches[1]; $codeblock = $this->outdent($codeblock); - $codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES); + if ($this->code_block_content_func) { + $codeblock = call_user_func($this->code_block_content_func, $codeblock, ""); + } else { + $codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES); + } # trim leading newlines and trailing newlines $codeblock = preg_replace('/\A\n+|\n+\z/', '', $codeblock); @@ -1550,1602 +1614,3 @@ class Markdown implements MarkdownInterface { } } - - -# -# Temporary Markdown Extra Parser Implementation Class -# -# NOTE: DON'T USE THIS CLASS -# Currently the implementation of of Extra resides here in this temporary class. -# This makes it easier to propagate the changes between the three different -# packaging styles of PHP Markdown. When this issue is resolved, this -# MarkdownExtra_TmpImpl class here will disappear and \Michelf\MarkdownExtra -# will contain the code. So please use \Michelf\MarkdownExtra and ignore this -# one. -# - -abstract class _MarkdownExtra_TmpImpl extends \Michelf\Markdown { - - ### Configuration Variables ### - - # Prefix for footnote ids. - public $fn_id_prefix = ""; - - # Optional title attribute for footnote links and backlinks. - public $fn_link_title = ""; - public $fn_backlink_title = ""; - - # Optional class attribute for footnote links and backlinks. - public $fn_link_class = "footnote-ref"; - public $fn_backlink_class = "footnote-backref"; - - # Class name for table cell alignment (%% replaced left/center/right) - # For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center' - # If empty, the align attribute is used instead of a class name. - public $table_align_class_tmpl = ''; - - # Optional class prefix for fenced code block. - public $code_class_prefix = ""; - # Class attribute for code blocks goes on the `code` tag; - # setting this to true will put attributes on the `pre` tag instead. - public $code_attr_on_pre = false; - - # Predefined abbreviations. - public $predef_abbr = array(); - - - ### Parser Implementation ### - - public function __construct() { - # - # Constructor function. Initialize the parser object. - # - # Add extra escapable characters before parent constructor - # initialize the table. - $this->escape_chars .= ':|'; - - # Insert extra document, block, and span transformations. - # Parent constructor will do the sorting. - $this->document_gamut += array( - "doFencedCodeBlocks" => 5, - "stripFootnotes" => 15, - "stripAbbreviations" => 25, - "appendFootnotes" => 50, - ); - $this->block_gamut += array( - "doFencedCodeBlocks" => 5, - "doTables" => 15, - "doDefLists" => 45, - ); - $this->span_gamut += array( - "doFootnotes" => 5, - "doAbbreviations" => 70, - ); - - parent::__construct(); - } - - - # Extra variables used during extra transformations. - protected $footnotes = array(); - protected $footnotes_ordered = array(); - protected $footnotes_ref_count = array(); - protected $footnotes_numbers = array(); - protected $abbr_desciptions = array(); - protected $abbr_word_re = ''; - - # Give the current footnote number. - protected $footnote_counter = 1; - - - protected function setup() { - # - # Setting up Extra-specific variables. - # - parent::setup(); - - $this->footnotes = array(); - $this->footnotes_ordered = array(); - $this->footnotes_ref_count = array(); - $this->footnotes_numbers = array(); - $this->abbr_desciptions = array(); - $this->abbr_word_re = ''; - $this->footnote_counter = 1; - - foreach ($this->predef_abbr as $abbr_word => $abbr_desc) { - if ($this->abbr_word_re) - $this->abbr_word_re .= '|'; - $this->abbr_word_re .= preg_quote($abbr_word); - $this->abbr_desciptions[$abbr_word] = trim($abbr_desc); - } - } - - protected function teardown() { - # - # Clearing Extra-specific variables. - # - $this->footnotes = array(); - $this->footnotes_ordered = array(); - $this->footnotes_ref_count = array(); - $this->footnotes_numbers = array(); - $this->abbr_desciptions = array(); - $this->abbr_word_re = ''; - - parent::teardown(); - } - - - ### Extra Attribute Parser ### - - # Expression to use to catch attributes (includes the braces) - protected $id_class_attr_catch_re = '\{((?:[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}'; - # Expression to use when parsing in a context when no capture is desired - protected $id_class_attr_nocatch_re = '\{(?:[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}'; - - protected function doExtraAttributes($tag_name, $attr) { - # - # Parse attributes caught by the $this->id_class_attr_catch_re expression - # and return the HTML-formatted list of attributes. - # - # Currently supported attributes are .class and #id. - # - if (empty($attr)) return ""; - - # Split on components - preg_match_all('/[#.a-z][-_:a-zA-Z0-9=]+/', $attr, $matches); - $elements = $matches[0]; - - # handle classes and ids (only first id taken into account) - $classes = array(); - $attributes = array(); - $id = false; - foreach ($elements as $element) { - if ($element{0} == '.') { - $classes[] = substr($element, 1); - } else if ($element{0} == '#') { - if ($id === false) $id = substr($element, 1); - } else if (strpos($element, '=') > 0) { - $parts = explode('=', $element, 2); - $attributes[] = $parts[0] . '="' . $parts[1] . '"'; - } - } - - # compose attributes as string - $attr_str = ""; - if (!empty($id)) { - $attr_str .= ' id="'.$id.'"'; - } - if (!empty($classes)) { - $attr_str .= ' class="'.implode(" ", $classes).'"'; - } - if (!$this->no_markup && !empty($attributes)) { - $attr_str .= ' '.implode(" ", $attributes); - } - return $attr_str; - } - - - protected function stripLinkDefinitions($text) { - # - # Strips link definitions from text, stores the URLs and titles in - # hash references. - # - $less_than_tab = $this->tab_width - 1; - - # Link defs are in the form: ^[id]: url "optional title" - $text = preg_replace_callback('{ - ^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?: # id = $1 - [ ]* - \n? # maybe *one* newline - [ ]* - (?: - <(.+?)> # url = $2 - | - (\S+?) # url = $3 - ) - [ ]* - \n? # maybe one newline - [ ]* - (?: - (?<=\s) # lookbehind for whitespace - ["(] - (.*?) # title = $4 - [")] - [ ]* - )? # title is optional - (?:[ ]* '.$this->id_class_attr_catch_re.' )? # $5 = extra id & class attr - (?:\n+|\Z) - }xm', - array($this, '_stripLinkDefinitions_callback'), - $text); - return $text; - } - protected function _stripLinkDefinitions_callback($matches) { - $link_id = strtolower($matches[1]); - $url = $matches[2] == '' ? $matches[3] : $matches[2]; - $this->urls[$link_id] = $url; - $this->titles[$link_id] =& $matches[4]; - $this->ref_attr[$link_id] = $this->doExtraAttributes("", $dummy =& $matches[5]); - return ''; # String that will replace the block - } - - - ### HTML Block Parser ### - - # Tags that are always treated as block tags: - protected $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure'; - - # Tags treated as block tags only if the opening tag is alone on its line: - protected $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video'; - - # Tags where markdown="1" default to span mode: - protected $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address'; - - # Tags which must not have their contents modified, no matter where - # they appear: - protected $clean_tags_re = 'script|style|math|svg'; - - # Tags that do not need to be closed. - protected $auto_close_tags_re = 'hr|img|param|source|track'; - - - protected function hashHTMLBlocks($text) { - # - # Hashify HTML Blocks and "clean tags". - # - # We only want to do this for block-level HTML tags, such as headers, - # lists, and tables. That's because we still want to wrap

s around - # "paragraphs" that are wrapped in non-block-level tags, such as anchors, - # phrase emphasis, and spans. The list of tags we're looking for is - # hard-coded. - # - # This works by calling _HashHTMLBlocks_InMarkdown, which then calls - # _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1" - # attribute is found within a tag, _HashHTMLBlocks_InHTML calls back - # _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag. - # These two functions are calling each other. It's recursive! - # - if ($this->no_markup) return $text; - - # - # Call the HTML-in-Markdown hasher. - # - list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text); - - return $text; - } - protected function _hashHTMLBlocks_inMarkdown($text, $indent = 0, - $enclosing_tag_re = '', $span = false) - { - # - # Parse markdown text, calling _HashHTMLBlocks_InHTML for block tags. - # - # * $indent is the number of space to be ignored when checking for code - # blocks. This is important because if we don't take the indent into - # account, something like this (which looks right) won't work as expected: - # - #

- #
- # Hello World. <-- Is this a Markdown code block or text? - #
<-- Is this a Markdown code block or a real tag? - #
- # - # If you don't like this, just don't indent the tag on which - # you apply the markdown="1" attribute. - # - # * If $enclosing_tag_re is not empty, stops at the first unmatched closing - # tag with that name. Nested tags supported. - # - # * If $span is true, text inside must treated as span. So any double - # newline will be replaced by a single newline so that it does not create - # paragraphs. - # - # Returns an array of that form: ( processed text , remaining text ) - # - if ($text === '') return array('', ''); - - # Regex to check for the presense of newlines around a block tag. - $newline_before_re = '/(?:^\n?|\n\n)*$/'; - $newline_after_re = - '{ - ^ # Start of text following the tag. - (?>[ ]*)? # Optional comment. - [ ]*\n # Must be followed by newline. - }xs'; - - # Regex to match any tag. - $block_tag_re = - '{ - ( # $2: Capture whole tag. - # Tag name. - '.$this->block_tags_re.' | - '.$this->context_block_tags_re.' | - '.$this->clean_tags_re.' | - (?!\s)'.$enclosing_tag_re.' - ) - (?: - (?=[\s"\'/a-zA-Z0-9]) # Allowed characters after tag name. - (?> - ".*?" | # Double quotes (can contain `>`) - \'.*?\' | # Single quotes (can contain `>`) - .+? # Anything but quotes and `>`. - )*? - )? - > # End of tag. - | - # HTML Comment - | - <\?.*?\?> | <%.*?%> # Processing instruction - | - # CData Block - '. ( !$span ? ' # If not in span. - | - # Indented code block - (?: ^[ ]*\n | ^ | \n[ ]*\n ) - [ ]{'.($indent+4).'}[^\n]* \n - (?> - (?: [ ]{'.($indent+4).'}[^\n]* | [ ]* ) \n - )* - | - # Fenced code block marker - (?<= ^ | \n ) - [ ]{0,'.($indent+3).'}(?:~{3,}|`{3,}) - [ ]* - (?: - \.?[-_:a-zA-Z0-9]+ # standalone class name - | - '.$this->id_class_attr_nocatch_re.' # extra attributes - )? - [ ]* - (?= \n ) - ' : '' ). ' # End (if not is span). - | - # Code span marker - # Note, this regex needs to go after backtick fenced - # code blocks but it should also be kept outside of the - # "if not in span" condition adding backticks to the parser - `+ - ) - }xs'; - - - $depth = 0; # Current depth inside the tag tree. - $parsed = ""; # Parsed text that will be returned. - - # - # Loop through every tag until we find the closing tag of the parent - # or loop until reaching the end of text if no parent tag specified. - # - do { - # - # Split the text using the first $tag_match pattern found. - # Text before pattern will be first in the array, text after - # pattern will be at the end, and between will be any catches made - # by the pattern. - # - $parts = preg_split($block_tag_re, $text, 2, - PREG_SPLIT_DELIM_CAPTURE); - - # If in Markdown span mode, add a empty-string span-level hash - # after each newline to prevent triggering any block element. - if ($span) { - $void = $this->hashPart("", ':'); - $newline = "$void\n"; - $parts[0] = $void . str_replace("\n", $newline, $parts[0]) . $void; - } - - $parsed .= $parts[0]; # Text before current tag. - - # If end of $text has been reached. Stop loop. - if (count($parts) < 3) { - $text = ""; - break; - } - - $tag = $parts[1]; # Tag to handle. - $text = $parts[2]; # Remaining text after current tag. - $tag_re = preg_quote($tag); # For use in a regular expression. - - # - # Check for: Fenced code block marker. - # Note: need to recheck the whole tag to disambiguate backtick - # fences from code spans - # - if (preg_match('{^\n?([ ]{0,'.($indent+3).'})(~{3,}|`{3,})[ ]*(?:\.?[-_:a-zA-Z0-9]+|'.$this->id_class_attr_nocatch_re.')?[ ]*\n?$}', $tag, $capture)) { - # Fenced code block marker: find matching end marker. - $fence_indent = strlen($capture[1]); # use captured indent in re - $fence_re = $capture[2]; # use captured fence in re - if (preg_match('{^(?>.*\n)*?[ ]{'.($fence_indent).'}'.$fence_re.'[ ]*(?:\n|$)}', $text, - $matches)) - { - # End marker found: pass text unchanged until marker. - $parsed .= $tag . $matches[0]; - $text = substr($text, strlen($matches[0])); - } - else { - # No end marker: just skip it. - $parsed .= $tag; - } - } - # - # Check for: Indented code block. - # - else if ($tag{0} == "\n" || $tag{0} == " ") { - # Indented code block: pass it unchanged, will be handled - # later. - $parsed .= $tag; - } - # - # Check for: Code span marker - # Note: need to check this after backtick fenced code blocks - # - else if ($tag{0} == "`") { - # Find corresponding end marker. - $tag_re = preg_quote($tag); - if (preg_match('{^(?>.+?|\n(?!\n))*?(?block_tags_re.')\b}', $tag) || - ( preg_match('{^<(?:'.$this->context_block_tags_re.')\b}', $tag) && - preg_match($newline_before_re, $parsed) && - preg_match($newline_after_re, $text) ) - ) - { - # Need to parse tag and following text using the HTML parser. - list($block_text, $text) = - $this->_hashHTMLBlocks_inHTML($tag . $text, "hashBlock", true); - - # Make sure it stays outside of any paragraph by adding newlines. - $parsed .= "\n\n$block_text\n\n"; - } - # - # Check for: Clean tag (like script, math) - # HTML Comments, processing instructions. - # - else if (preg_match('{^<(?:'.$this->clean_tags_re.')\b}', $tag) || - $tag{1} == '!' || $tag{1} == '?') - { - # Need to parse tag and following text using the HTML parser. - # (don't check for markdown attribute) - list($block_text, $text) = - $this->_hashHTMLBlocks_inHTML($tag . $text, "hashClean", false); - - $parsed .= $block_text; - } - # - # Check for: Tag with same name as enclosing tag. - # - else if ($enclosing_tag_re !== '' && - # Same name as enclosing tag. - preg_match('{^= 0); - - return array($parsed, $text); - } - protected function _hashHTMLBlocks_inHTML($text, $hash_method, $md_attr) { - # - # Parse HTML, calling _HashHTMLBlocks_InMarkdown for block tags. - # - # * Calls $hash_method to convert any blocks. - # * Stops when the first opening tag closes. - # * $md_attr indicate if the use of the `markdown="1"` attribute is allowed. - # (it is not inside clean tags) - # - # Returns an array of that form: ( processed text , remaining text ) - # - if ($text === '') return array('', ''); - - # Regex to match `markdown` attribute inside of a tag. - $markdown_attr_re = ' - { - \s* # Eat whitespace before the `markdown` attribute - markdown - \s*=\s* - (?> - (["\']) # $1: quote delimiter - (.*?) # $2: attribute value - \1 # matching delimiter - | - ([^\s>]*) # $3: unquoted attribute value - ) - () # $4: make $3 always defined (avoid warnings) - }xs'; - - # Regex to match any tag. - $tag_re = '{ - ( # $2: Capture whole tag. - - ".*?" | # Double quotes (can contain `>`) - \'.*?\' | # Single quotes (can contain `>`) - .+? # Anything but quotes and `>`. - )*? - )? - > # End of tag. - | - # HTML Comment - | - <\?.*?\?> | <%.*?%> # Processing instruction - | - # CData Block - ) - }xs'; - - $original_text = $text; # Save original text in case of faliure. - - $depth = 0; # Current depth inside the tag tree. - $block_text = ""; # Temporary text holder for current text. - $parsed = ""; # Parsed text that will be returned. - - # - # Get the name of the starting tag. - # (This pattern makes $base_tag_name_re safe without quoting.) - # - if (preg_match('/^<([\w:$]*)\b/', $text, $matches)) - $base_tag_name_re = $matches[1]; - - # - # Loop through every tag until we find the corresponding closing tag. - # - do { - # - # Split the text using the first $tag_match pattern found. - # Text before pattern will be first in the array, text after - # pattern will be at the end, and between will be any catches made - # by the pattern. - # - $parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE); - - if (count($parts) < 3) { - # - # End of $text reached with unbalenced tag(s). - # In that case, we return original text unchanged and pass the - # first character as filtered to prevent an infinite loop in the - # parent function. - # - return array($original_text{0}, substr($original_text, 1)); - } - - $block_text .= $parts[0]; # Text before current tag. - $tag = $parts[1]; # Tag to handle. - $text = $parts[2]; # Remaining text after current tag. - - # - # Check for: Auto-close tag (like
) - # Comments and Processing Instructions. - # - if (preg_match('{^auto_close_tags_re.')\b}', $tag) || - $tag{1} == '!' || $tag{1} == '?') - { - # Just add the tag to the block as if it was text. - $block_text .= $tag; - } - else { - # - # Increase/decrease nested tag count. Only do so if - # the tag's name match base tag's. - # - if (preg_match('{^mode = $attr_m[2] . $attr_m[3]; - $span_mode = $this->mode == 'span' || $this->mode != 'block' && - preg_match('{^<(?:'.$this->contain_span_tags_re.')\b}', $tag); - - # Calculate indent before tag. - if (preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches)) { - $strlen = $this->utf8_strlen; - $indent = $strlen($matches[1], 'UTF-8'); - } else { - $indent = 0; - } - - # End preceding block with this tag. - $block_text .= $tag; - $parsed .= $this->$hash_method($block_text); - - # Get enclosing tag name for the ParseMarkdown function. - # (This pattern makes $tag_name_re safe without quoting.) - preg_match('/^<([\w:$]*)\b/', $tag, $matches); - $tag_name_re = $matches[1]; - - # Parse the content using the HTML-in-Markdown parser. - list ($block_text, $text) - = $this->_hashHTMLBlocks_inMarkdown($text, $indent, - $tag_name_re, $span_mode); - - # Outdent markdown text. - if ($indent > 0) { - $block_text = preg_replace("/^[ ]{1,$indent}/m", "", - $block_text); - } - - # Append tag content to parsed text. - if (!$span_mode) $parsed .= "\n\n$block_text\n\n"; - else $parsed .= "$block_text"; - - # Start over with a new block. - $block_text = ""; - } - else $block_text .= $tag; - } - - } while ($depth > 0); - - # - # Hash last block text that wasn't processed inside the loop. - # - $parsed .= $this->$hash_method($block_text); - - return array($parsed, $text); - } - - - protected function hashClean($text) { - # - # Called whenever a tag must be hashed when a function inserts a "clean" tag - # in $text, it passes through this function and is automaticaly escaped, - # blocking invalid nested overlap. - # - return $this->hashPart($text, 'C'); - } - - - protected function doAnchors($text) { - # - # Turn Markdown link shortcuts into XHTML tags. - # - if ($this->in_anchor) return $text; - $this->in_anchor = true; - - # - # First, handle reference-style links: [link text] [id] - # - $text = preg_replace_callback('{ - ( # wrap whole match in $1 - \[ - ('.$this->nested_brackets_re.') # link text = $2 - \] - - [ ]? # one optional space - (?:\n[ ]*)? # one optional newline followed by spaces - - \[ - (.*?) # id = $3 - \] - ) - }xs', - array($this, '_doAnchors_reference_callback'), $text); - - # - # Next, inline-style links: [link text](url "optional title") - # - $text = preg_replace_callback('{ - ( # wrap whole match in $1 - \[ - ('.$this->nested_brackets_re.') # link text = $2 - \] - \( # literal paren - [ \n]* - (?: - <(.+?)> # href = $3 - | - ('.$this->nested_url_parenthesis_re.') # href = $4 - ) - [ \n]* - ( # $5 - ([\'"]) # quote char = $6 - (.*?) # Title = $7 - \6 # matching quote - [ \n]* # ignore any spaces/tabs between closing quote and ) - )? # title is optional - \) - (?:[ ]? '.$this->id_class_attr_catch_re.' )? # $8 = id/class attributes - ) - }xs', - array($this, '_doAnchors_inline_callback'), $text); - - # - # Last, handle reference-style shortcuts: [link text] - # These must come last in case you've also got [link text][1] - # or [link text](/foo) - # - $text = preg_replace_callback('{ - ( # wrap whole match in $1 - \[ - ([^\[\]]+) # link text = $2; can\'t contain [ or ] - \] - ) - }xs', - array($this, '_doAnchors_reference_callback'), $text); - - $this->in_anchor = false; - return $text; - } - protected function _doAnchors_reference_callback($matches) { - $whole_match = $matches[1]; - $link_text = $matches[2]; - $link_id =& $matches[3]; - - if ($link_id == "") { - # for shortcut links like [this][] or [this]. - $link_id = $link_text; - } - - # lower-case and turn embedded newlines into spaces - $link_id = strtolower($link_id); - $link_id = preg_replace('{[ ]?\n}', ' ', $link_id); - - if (isset($this->urls[$link_id])) { - $url = $this->urls[$link_id]; - $url = $this->encodeURLAttribute($url); - - $result = "titles[$link_id] ) ) { - $title = $this->titles[$link_id]; - $title = $this->encodeAttribute($title); - $result .= " title=\"$title\""; - } - if (isset($this->ref_attr[$link_id])) - $result .= $this->ref_attr[$link_id]; - - $link_text = $this->runSpanGamut($link_text); - $result .= ">$link_text"; - $result = $this->hashPart($result); - } - else { - $result = $whole_match; - } - return $result; - } - protected function _doAnchors_inline_callback($matches) { - $whole_match = $matches[1]; - $link_text = $this->runSpanGamut($matches[2]); - $url = $matches[3] == '' ? $matches[4] : $matches[3]; - $title =& $matches[7]; - $attr = $this->doExtraAttributes("a", $dummy =& $matches[8]); - - // if the URL was of the form it got caught by the HTML - // tag parser and hashed. Need to reverse the process before using the URL. - $unhashed = $this->unhash($url); - if ($unhashed != $url) - $url = preg_replace('/^<(.*)>$/', '\1', $unhashed); - - $url = $this->encodeURLAttribute($url); - - $result = "encodeAttribute($title); - $result .= " title=\"$title\""; - } - $result .= $attr; - - $link_text = $this->runSpanGamut($link_text); - $result .= ">$link_text"; - - return $this->hashPart($result); - } - - - protected function doImages($text) { - # - # Turn Markdown image shortcuts into tags. - # - # - # First, handle reference-style labeled images: ![alt text][id] - # - $text = preg_replace_callback('{ - ( # wrap whole match in $1 - !\[ - ('.$this->nested_brackets_re.') # alt text = $2 - \] - - [ ]? # one optional space - (?:\n[ ]*)? # one optional newline followed by spaces - - \[ - (.*?) # id = $3 - \] - - ) - }xs', - array($this, '_doImages_reference_callback'), $text); - - # - # Next, handle inline images: ![alt text](url "optional title") - # Don't forget: encode * and _ - # - $text = preg_replace_callback('{ - ( # wrap whole match in $1 - !\[ - ('.$this->nested_brackets_re.') # alt text = $2 - \] - \s? # One optional whitespace character - \( # literal paren - [ \n]* - (?: - <(\S*)> # src url = $3 - | - ('.$this->nested_url_parenthesis_re.') # src url = $4 - ) - [ \n]* - ( # $5 - ([\'"]) # quote char = $6 - (.*?) # title = $7 - \6 # matching quote - [ \n]* - )? # title is optional - \) - (?:[ ]? '.$this->id_class_attr_catch_re.' )? # $8 = id/class attributes - ) - }xs', - array($this, '_doImages_inline_callback'), $text); - - return $text; - } - protected function _doImages_reference_callback($matches) { - $whole_match = $matches[1]; - $alt_text = $matches[2]; - $link_id = strtolower($matches[3]); - - if ($link_id == "") { - $link_id = strtolower($alt_text); # for shortcut links like ![this][]. - } - - $alt_text = $this->encodeAttribute($alt_text); - if (isset($this->urls[$link_id])) { - $url = $this->encodeURLAttribute($this->urls[$link_id]); - $result = "\"$alt_text\"";titles[$link_id])) { - $title = $this->titles[$link_id]; - $title = $this->encodeAttribute($title); - $result .= " title=\"$title\""; - } - if (isset($this->ref_attr[$link_id])) - $result .= $this->ref_attr[$link_id]; - $result .= $this->empty_element_suffix; - $result = $this->hashPart($result); - } - else { - # If there's no such link ID, leave intact: - $result = $whole_match; - } - - return $result; - } - protected function _doImages_inline_callback($matches) { - $whole_match = $matches[1]; - $alt_text = $matches[2]; - $url = $matches[3] == '' ? $matches[4] : $matches[3]; - $title =& $matches[7]; - $attr = $this->doExtraAttributes("img", $dummy =& $matches[8]); - - $alt_text = $this->encodeAttribute($alt_text); - $url = $this->encodeURLAttribute($url); - $result = "\"$alt_text\"";encodeAttribute($title); - $result .= " title=\"$title\""; # $title already quoted - } - $result .= $attr; - $result .= $this->empty_element_suffix; - - return $this->hashPart($result); - } - - - protected function doHeaders($text) { - # - # Redefined to add id and class attribute support. - # - # Setext-style headers: - # Header 1 {#header1} - # ======== - # - # Header 2 {#header2 .class1 .class2} - # -------- - # - $text = preg_replace_callback( - '{ - (^.+?) # $1: Header text - (?:[ ]+ '.$this->id_class_attr_catch_re.' )? # $3 = id/class attributes - [ ]*\n(=+|-+)[ ]*\n+ # $3: Header footer - }mx', - array($this, '_doHeaders_callback_setext'), $text); - - # atx-style headers: - # # Header 1 {#header1} - # ## Header 2 {#header2} - # ## Header 2 with closing hashes ## {#header3.class1.class2} - # ... - # ###### Header 6 {.class2} - # - $text = preg_replace_callback('{ - ^(\#{1,6}) # $1 = string of #\'s - [ ]* - (.+?) # $2 = Header text - [ ]* - \#* # optional closing #\'s (not counted) - (?:[ ]+ '.$this->id_class_attr_catch_re.' )? # $3 = id/class attributes - [ ]* - \n+ - }xm', - array($this, '_doHeaders_callback_atx'), $text); - - return $text; - } - protected function _doHeaders_callback_setext($matches) { - if ($matches[3] == '-' && preg_match('{^- }', $matches[1])) - return $matches[0]; - $level = $matches[3]{0} == '=' ? 1 : 2; - $attr = $this->doExtraAttributes("h$level", $dummy =& $matches[2]); - $block = "".$this->runSpanGamut($matches[1]).""; - return "\n" . $this->hashBlock($block) . "\n\n"; - } - protected function _doHeaders_callback_atx($matches) { - $level = strlen($matches[1]); - $attr = $this->doExtraAttributes("h$level", $dummy =& $matches[3]); - $block = "".$this->runSpanGamut($matches[2]).""; - return "\n" . $this->hashBlock($block) . "\n\n"; - } - - - protected function doTables($text) { - # - # Form HTML tables. - # - $less_than_tab = $this->tab_width - 1; - # - # Find tables with leading pipe. - # - # | Header 1 | Header 2 - # | -------- | -------- - # | Cell 1 | Cell 2 - # | Cell 3 | Cell 4 - # - $text = preg_replace_callback(' - { - ^ # Start of a line - [ ]{0,'.$less_than_tab.'} # Allowed whitespace. - [|] # Optional leading pipe (present) - (.+) \n # $1: Header row (at least one pipe) - - [ ]{0,'.$less_than_tab.'} # Allowed whitespace. - [|] ([ ]*[-:]+[-| :]*) \n # $2: Header underline - - ( # $3: Cells - (?> - [ ]* # Allowed whitespace. - [|] .* \n # Row content. - )* - ) - (?=\n|\Z) # Stop at final double newline. - }xm', - array($this, '_doTable_leadingPipe_callback'), $text); - - # - # Find tables without leading pipe. - # - # Header 1 | Header 2 - # -------- | -------- - # Cell 1 | Cell 2 - # Cell 3 | Cell 4 - # - $text = preg_replace_callback(' - { - ^ # Start of a line - [ ]{0,'.$less_than_tab.'} # Allowed whitespace. - (\S.*[|].*) \n # $1: Header row (at least one pipe) - - [ ]{0,'.$less_than_tab.'} # Allowed whitespace. - ([-:]+[ ]*[|][-| :]*) \n # $2: Header underline - - ( # $3: Cells - (?> - .* [|] .* \n # Row content - )* - ) - (?=\n|\Z) # Stop at final double newline. - }xm', - array($this, '_DoTable_callback'), $text); - - return $text; - } - protected function _doTable_leadingPipe_callback($matches) { - $head = $matches[1]; - $underline = $matches[2]; - $content = $matches[3]; - - # Remove leading pipe for each row. - $content = preg_replace('/^ *[|]/m', '', $content); - - return $this->_doTable_callback(array($matches[0], $head, $underline, $content)); - } - protected function _doTable_makeAlignAttr($alignname) - { - if (empty($this->table_align_class_tmpl)) - return " align=\"$alignname\""; - - $classname = str_replace('%%', $alignname, $this->table_align_class_tmpl); - return " class=\"$classname\""; - } - protected function _doTable_callback($matches) { - $head = $matches[1]; - $underline = $matches[2]; - $content = $matches[3]; - - # Remove any tailing pipes for each line. - $head = preg_replace('/[|] *$/m', '', $head); - $underline = preg_replace('/[|] *$/m', '', $underline); - $content = preg_replace('/[|] *$/m', '', $content); - - # Reading alignement from header underline. - $separators = preg_split('/ *[|] */', $underline); - foreach ($separators as $n => $s) { - if (preg_match('/^ *-+: *$/', $s)) - $attr[$n] = $this->_doTable_makeAlignAttr('right'); - else if (preg_match('/^ *:-+: *$/', $s)) - $attr[$n] = $this->_doTable_makeAlignAttr('center'); - else if (preg_match('/^ *:-+ *$/', $s)) - $attr[$n] = $this->_doTable_makeAlignAttr('left'); - else - $attr[$n] = ''; - } - - # Parsing span elements, including code spans, character escapes, - # and inline HTML tags, so that pipes inside those gets ignored. - $head = $this->parseSpan($head); - $headers = preg_split('/ *[|] */', $head); - $col_count = count($headers); - $attr = array_pad($attr, $col_count, ''); - - # Write column headers. - $text = "\n"; - $text .= "\n"; - $text .= "\n"; - foreach ($headers as $n => $header) - $text .= " ".$this->runSpanGamut(trim($header))."\n"; - $text .= "\n"; - $text .= "\n"; - - # Split content by row. - $rows = explode("\n", trim($content, "\n")); - - $text .= "\n"; - foreach ($rows as $row) { - # Parsing span elements, including code spans, character escapes, - # and inline HTML tags, so that pipes inside those gets ignored. - $row = $this->parseSpan($row); - - # Split row by cell. - $row_cells = preg_split('/ *[|] */', $row, $col_count); - $row_cells = array_pad($row_cells, $col_count, ''); - - $text .= "\n"; - foreach ($row_cells as $n => $cell) - $text .= " ".$this->runSpanGamut(trim($cell))."\n"; - $text .= "\n"; - } - $text .= "\n"; - $text .= "
"; - - return $this->hashBlock($text) . "\n"; - } - - - protected function doDefLists($text) { - # - # Form HTML definition lists. - # - $less_than_tab = $this->tab_width - 1; - - # Re-usable pattern to match any entire dl list: - $whole_list_re = '(?> - ( # $1 = whole list - ( # $2 - [ ]{0,'.$less_than_tab.'} - ((?>.*\S.*\n)+) # $3 = defined term - \n? - [ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition - ) - (?s:.+?) - ( # $4 - \z - | - \n{2,} - (?=\S) - (?! # Negative lookahead for another term - [ ]{0,'.$less_than_tab.'} - (?: \S.*\n )+? # defined term - \n? - [ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition - ) - (?! # Negative lookahead for another definition - [ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition - ) - ) - ) - )'; // mx - - $text = preg_replace_callback('{ - (?>\A\n?|(?<=\n\n)) - '.$whole_list_re.' - }mx', - array($this, '_doDefLists_callback'), $text); - - return $text; - } - protected function _doDefLists_callback($matches) { - # Re-usable patterns to match list item bullets and number markers: - $list = $matches[1]; - - # Turn double returns into triple returns, so that we can make a - # paragraph for the last item in a list, if necessary: - $result = trim($this->processDefListItems($list)); - $result = "
\n" . $result . "\n
"; - return $this->hashBlock($result) . "\n\n"; - } - - - protected function processDefListItems($list_str) { - # - # Process the contents of a single definition list, splitting it - # into individual term and definition list items. - # - $less_than_tab = $this->tab_width - 1; - - # trim trailing blank lines: - $list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str); - - # Process definition terms. - $list_str = preg_replace_callback('{ - (?>\A\n?|\n\n+) # leading line - ( # definition terms = $1 - [ ]{0,'.$less_than_tab.'} # leading whitespace - (?!\:[ ]|[ ]) # negative lookahead for a definition - # mark (colon) or more whitespace. - (?> \S.* \n)+? # actual term (not whitespace). - ) - (?=\n?[ ]{0,3}:[ ]) # lookahead for following line feed - # with a definition mark. - }xm', - array($this, '_processDefListItems_callback_dt'), $list_str); - - # Process actual definitions. - $list_str = preg_replace_callback('{ - \n(\n+)? # leading line = $1 - ( # marker space = $2 - [ ]{0,'.$less_than_tab.'} # whitespace before colon - \:[ ]+ # definition mark (colon) - ) - ((?s:.+?)) # definition text = $3 - (?= \n+ # stop at next definition mark, - (?: # next term or end of text - [ ]{0,'.$less_than_tab.'} \:[ ] | -
| \z - ) - ) - }xm', - array($this, '_processDefListItems_callback_dd'), $list_str); - - return $list_str; - } - protected function _processDefListItems_callback_dt($matches) { - $terms = explode("\n", trim($matches[1])); - $text = ''; - foreach ($terms as $term) { - $term = $this->runSpanGamut(trim($term)); - $text .= "\n
" . $term . "
"; - } - return $text . "\n"; - } - protected function _processDefListItems_callback_dd($matches) { - $leading_line = $matches[1]; - $marker_space = $matches[2]; - $def = $matches[3]; - - if ($leading_line || preg_match('/\n{2,}/', $def)) { - # Replace marker with the appropriate whitespace indentation - $def = str_repeat(' ', strlen($marker_space)) . $def; - $def = $this->runBlockGamut($this->outdent($def . "\n\n")); - $def = "\n". $def ."\n"; - } - else { - $def = rtrim($def); - $def = $this->runSpanGamut($this->outdent($def)); - } - - return "\n
" . $def . "
\n"; - } - - - protected function doFencedCodeBlocks($text) { - # - # Adding the fenced code block syntax to regular Markdown: - # - # ~~~ - # Code block - # ~~~ - # - $less_than_tab = $this->tab_width; - - $text = preg_replace_callback('{ - (?:\n|\A) - # 1: Opening marker - ( - (?:~{3,}|`{3,}) # 3 or more tildes/backticks. - ) - [ ]* - (?: - \.?([-_:a-zA-Z0-9]+) # 2: standalone class name - | - '.$this->id_class_attr_catch_re.' # 3: Extra attributes - )? - [ ]* \n # Whitespace and newline following marker. - - # 4: Content - ( - (?> - (?!\1 [ ]* \n) # Not a closing marker. - .*\n+ - )+ - ) - - # Closing marker. - \1 [ ]* (?= \n ) - }xm', - array($this, '_doFencedCodeBlocks_callback'), $text); - - return $text; - } - protected function _doFencedCodeBlocks_callback($matches) { - $classname =& $matches[2]; - $attrs =& $matches[3]; - $codeblock = $matches[4]; - $codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES); - $codeblock = preg_replace_callback('/^\n+/', - array($this, '_doFencedCodeBlocks_newlines'), $codeblock); - - if ($classname != "") { - if ($classname{0} == '.') - $classname = substr($classname, 1); - $attr_str = ' class="'.$this->code_class_prefix.$classname.'"'; - } else { - $attr_str = $this->doExtraAttributes($this->code_attr_on_pre ? "pre" : "code", $attrs); - } - $pre_attr_str = $this->code_attr_on_pre ? $attr_str : ''; - $code_attr_str = $this->code_attr_on_pre ? '' : $attr_str; - $codeblock = "$codeblock"; - - return "\n\n".$this->hashBlock($codeblock)."\n\n"; - } - protected function _doFencedCodeBlocks_newlines($matches) { - return str_repeat("empty_element_suffix", - strlen($matches[0])); - } - - - # - # Redefining emphasis markers so that emphasis by underscore does not - # work in the middle of a word. - # - protected $em_relist = array( - '' => '(?:(? '(? '(? '(?:(? '(? '(? '(?:(? '(? '(? tags - # - # Strip leading and trailing lines: - $text = preg_replace('/\A\n+|\n+\z/', '', $text); - - $grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY); - - # - # Wrap

tags and unhashify HTML blocks - # - foreach ($grafs as $key => $value) { - $value = trim($this->runSpanGamut($value)); - - # Check if this should be enclosed in a paragraph. - # Clean tag hashes & block tag hashes are left alone. - $is_p = !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value); - - if ($is_p) { - $value = "

$value

"; - } - $grafs[$key] = $value; - } - - # Join grafs in one text, then unhash HTML tags. - $text = implode("\n\n", $grafs); - - # Finish by removing any tag hashes still present in $text. - $text = $this->unhash($text); - - return $text; - } - - - ### Footnotes - - protected function stripFootnotes($text) { - # - # Strips link definitions from text, stores the URLs and titles in - # hash references. - # - $less_than_tab = $this->tab_width - 1; - - # Link defs are in the form: [^id]: url "optional title" - $text = preg_replace_callback('{ - ^[ ]{0,'.$less_than_tab.'}\[\^(.+?)\][ ]?: # note_id = $1 - [ ]* - \n? # maybe *one* newline - ( # text = $2 (no blank lines allowed) - (?: - .+ # actual text - | - \n # newlines but - (?!\[.+?\][ ]?:\s)# negative lookahead for footnote or link definition marker. - (?!\n+[ ]{0,3}\S)# ensure line is not blank and followed - # by non-indented content - )* - ) - }xm', - array($this, '_stripFootnotes_callback'), - $text); - return $text; - } - protected function _stripFootnotes_callback($matches) { - $note_id = $this->fn_id_prefix . $matches[1]; - $this->footnotes[$note_id] = $this->outdent($matches[2]); - return ''; # String that will replace the block - } - - - protected function doFootnotes($text) { - # - # Replace footnote references in $text [^id] with a special text-token - # which will be replaced by the actual footnote marker in appendFootnotes. - # - if (!$this->in_anchor) { - $text = preg_replace('{\[\^(.+?)\]}', "F\x1Afn:\\1\x1A:", $text); - } - return $text; - } - - - protected function appendFootnotes($text) { - # - # Append footnote list to text. - # - $text = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', - array($this, '_appendFootnotes_callback'), $text); - - if (!empty($this->footnotes_ordered)) { - $text .= "\n\n"; - $text .= "
\n"; - $text .= "empty_element_suffix ."\n"; - $text .= "
    \n\n"; - - $attr = ""; - if ($this->fn_backlink_class != "") { - $class = $this->fn_backlink_class; - $class = $this->encodeAttribute($class); - $attr .= " class=\"$class\""; - } - if ($this->fn_backlink_title != "") { - $title = $this->fn_backlink_title; - $title = $this->encodeAttribute($title); - $attr .= " title=\"$title\""; - } - $num = 0; - - while (!empty($this->footnotes_ordered)) { - $footnote = reset($this->footnotes_ordered); - $note_id = key($this->footnotes_ordered); - unset($this->footnotes_ordered[$note_id]); - $ref_count = $this->footnotes_ref_count[$note_id]; - unset($this->footnotes_ref_count[$note_id]); - unset($this->footnotes[$note_id]); - - $footnote .= "\n"; # Need to append newline before parsing. - $footnote = $this->runBlockGamut("$footnote\n"); - $footnote = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', - array($this, '_appendFootnotes_callback'), $footnote); - - $attr = str_replace("%%", ++$num, $attr); - $note_id = $this->encodeAttribute($note_id); - - # Prepare backlink, multiple backlinks if multiple references - $backlink = "↩"; - for ($ref_num = 2; $ref_num <= $ref_count; ++$ref_num) { - $backlink .= " ↩"; - } - # Add backlink to last paragraph; create new paragraph if needed. - if (preg_match('{

    $}', $footnote)) { - $footnote = substr($footnote, 0, -4) . " $backlink

    "; - } else { - $footnote .= "\n\n

    $backlink

    "; - } - - $text .= "
  1. \n"; - $text .= $footnote . "\n"; - $text .= "
    2. \n\n"; - } - - $text .= "
\n"; - $text .= "
"; - } - return $text; - } - protected function _appendFootnotes_callback($matches) { - $node_id = $this->fn_id_prefix . $matches[1]; - - # Create footnote marker only if it has a corresponding footnote *and* - # the footnote hasn't been used by another marker. - if (isset($this->footnotes[$node_id])) { - $num =& $this->footnotes_numbers[$node_id]; - if (!isset($num)) { - # Transfer footnote content to the ordered list and give it its - # number - $this->footnotes_ordered[$node_id] = $this->footnotes[$node_id]; - $this->footnotes_ref_count[$node_id] = 1; - $num = $this->footnote_counter++; - $ref_count_mark = ''; - } else { - $ref_count_mark = $this->footnotes_ref_count[$node_id] += 1; - } - - $attr = ""; - if ($this->fn_link_class != "") { - $class = $this->fn_link_class; - $class = $this->encodeAttribute($class); - $attr .= " class=\"$class\""; - } - if ($this->fn_link_title != "") { - $title = $this->fn_link_title; - $title = $this->encodeAttribute($title); - $attr .= " title=\"$title\""; - } - - $attr = str_replace("%%", $num, $attr); - $node_id = $this->encodeAttribute($node_id); - - return - "". - "$num". - ""; - } - - return "[^".$matches[1]."]"; - } - - - ### Abbreviations ### - - protected function stripAbbreviations($text) { - # - # Strips abbreviations from text, stores titles in hash references. - # - $less_than_tab = $this->tab_width - 1; - - # Link defs are in the form: [id]*: url "optional title" - $text = preg_replace_callback('{ - ^[ ]{0,'.$less_than_tab.'}\*\[(.+?)\][ ]?: # abbr_id = $1 - (.*) # text = $2 (no blank lines allowed) - }xm', - array($this, '_stripAbbreviations_callback'), - $text); - return $text; - } - protected function _stripAbbreviations_callback($matches) { - $abbr_word = $matches[1]; - $abbr_desc = $matches[2]; - if ($this->abbr_word_re) - $this->abbr_word_re .= '|'; - $this->abbr_word_re .= preg_quote($abbr_word); - $this->abbr_desciptions[$abbr_word] = trim($abbr_desc); - return ''; # String that will replace the block - } - - - protected function doAbbreviations($text) { - # - # Find defined abbreviations in text and wrap them in elements. - # - if ($this->abbr_word_re) { - // cannot use the /x modifier because abbr_word_re may - // contain significant spaces: - $text = preg_replace_callback('{'. - '(?abbr_word_re.')'. - '(?![\w\x1A])'. - '}', - array($this, '_doAbbreviations_callback'), $text); - } - return $text; - } - protected function _doAbbreviations_callback($matches) { - $abbr = $matches[0]; - if (isset($this->abbr_desciptions[$abbr])) { - $desc = $this->abbr_desciptions[$abbr]; - if (empty($desc)) { - return $this->hashPart("$abbr"); - } else { - $desc = $this->encodeAttribute($desc); - return $this->hashPart("$abbr"); - } - } else { - return $matches[0]; - } - } - -} diff --git a/extlib/Michelf/MarkdownExtra.php b/extlib/Michelf/MarkdownExtra.php index 89822e4c20..1bab3d2a10 100644 --- a/extlib/Michelf/MarkdownExtra.php +++ b/extlib/Michelf/MarkdownExtra.php @@ -3,36 +3,1623 @@ # Markdown Extra - A text-to-HTML conversion tool for web writers # # PHP Markdown Extra -# Copyright (c) 2004-2014 Michel Fortin -# +# Copyright (c) 2004-2015 Michel Fortin +# # # Original Markdown # Copyright (c) 2004-2006 John Gruber -# +# # namespace Michelf; -# Just force Michelf/Markdown.php to load. This is needed to load -# the temporary implementation class. See below for details. -\Michelf\Markdown::MARKDOWNLIB_VERSION; - # # Markdown Extra Parser Class # -# Note: Currently the implementation resides in the temporary class -# \Michelf\MarkdownExtra_TmpImpl (in the same file as \Michelf\Markdown). -# This makes it easier to propagate the changes between the three different -# packaging styles of PHP Markdown. Once this issue is resolved, the -# _MarkdownExtra_TmpImpl will disappear and this one will contain the code. -# -class MarkdownExtra extends \Michelf\_MarkdownExtra_TmpImpl { +class MarkdownExtra extends \Michelf\Markdown { + + ### Configuration Variables ### + + # Prefix for footnote ids. + public $fn_id_prefix = ""; + + # Optional title attribute for footnote links and backlinks. + public $fn_link_title = ""; + public $fn_backlink_title = ""; + + # Optional class attribute for footnote links and backlinks. + public $fn_link_class = "footnote-ref"; + public $fn_backlink_class = "footnote-backref"; + + # Content to be displayed within footnote backlinks. The default is '↩'; + # the U+FE0E on the end is a Unicode variant selector used to prevent iOS + # from displaying the arrow character as an emoji. + public $fn_backlink_html = '↩︎'; + + # Class name for table cell alignment (%% replaced left/center/right) + # For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center' + # If empty, the align attribute is used instead of a class name. + public $table_align_class_tmpl = ''; + + # Optional class prefix for fenced code block. + public $code_class_prefix = ""; + # Class attribute for code blocks goes on the `code` tag; + # setting this to true will put attributes on the `pre` tag instead. + public $code_attr_on_pre = false; + + # Predefined abbreviations. + public $predef_abbr = array(); ### Parser Implementation ### - # Temporarily, the implemenation is in the _MarkdownExtra_TmpImpl class. - # See note above. + public function __construct() { + # + # Constructor function. Initialize the parser object. + # + # Add extra escapable characters before parent constructor + # initialize the table. + $this->escape_chars .= ':|'; + + # Insert extra document, block, and span transformations. + # Parent constructor will do the sorting. + $this->document_gamut += array( + "doFencedCodeBlocks" => 5, + "stripFootnotes" => 15, + "stripAbbreviations" => 25, + "appendFootnotes" => 50, + ); + $this->block_gamut += array( + "doFencedCodeBlocks" => 5, + "doTables" => 15, + "doDefLists" => 45, + ); + $this->span_gamut += array( + "doFootnotes" => 5, + "doAbbreviations" => 70, + ); + + $this->enhanced_ordered_list = true; + parent::__construct(); + } + + + # Extra variables used during extra transformations. + protected $footnotes = array(); + protected $footnotes_ordered = array(); + protected $footnotes_ref_count = array(); + protected $footnotes_numbers = array(); + protected $abbr_desciptions = array(); + protected $abbr_word_re = ''; + + # Give the current footnote number. + protected $footnote_counter = 1; + + + protected function setup() { + # + # Setting up Extra-specific variables. + # + parent::setup(); + + $this->footnotes = array(); + $this->footnotes_ordered = array(); + $this->footnotes_ref_count = array(); + $this->footnotes_numbers = array(); + $this->abbr_desciptions = array(); + $this->abbr_word_re = ''; + $this->footnote_counter = 1; + + foreach ($this->predef_abbr as $abbr_word => $abbr_desc) { + if ($this->abbr_word_re) + $this->abbr_word_re .= '|'; + $this->abbr_word_re .= preg_quote($abbr_word); + $this->abbr_desciptions[$abbr_word] = trim($abbr_desc); + } + } + + protected function teardown() { + # + # Clearing Extra-specific variables. + # + $this->footnotes = array(); + $this->footnotes_ordered = array(); + $this->footnotes_ref_count = array(); + $this->footnotes_numbers = array(); + $this->abbr_desciptions = array(); + $this->abbr_word_re = ''; + + parent::teardown(); + } + + + ### Extra Attribute Parser ### + # Expression to use to catch attributes (includes the braces) + protected $id_class_attr_catch_re = '\{((?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}'; + # Expression to use when parsing in a context when no capture is desired + protected $id_class_attr_nocatch_re = '\{(?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}'; + + protected function doExtraAttributes($tag_name, $attr, $defaultIdValue = null, $classes = array()) { + # + # Parse attributes caught by the $this->id_class_attr_catch_re expression + # and return the HTML-formatted list of attributes. + # + # Currently supported attributes are .class and #id. + # + # In addition, this method also supports supplying a default Id value, + # which will be used to populate the id attribute in case it was not + # overridden. + if (empty($attr) && !$defaultIdValue && empty($classes)) return ""; + + # Split on components + preg_match_all('/[#.a-z][-_:a-zA-Z0-9=]+/', $attr, $matches); + $elements = $matches[0]; + + # handle classes and ids (only first id taken into account) + $attributes = array(); + $id = false; + foreach ($elements as $element) { + if ($element{0} == '.') { + $classes[] = substr($element, 1); + } else if ($element{0} == '#') { + if ($id === false) $id = substr($element, 1); + } else if (strpos($element, '=') > 0) { + $parts = explode('=', $element, 2); + $attributes[] = $parts[0] . '="' . $parts[1] . '"'; + } + } + + if (!$id) $id = $defaultIdValue; + + # compose attributes as string + $attr_str = ""; + if (!empty($id)) { + $attr_str .= ' id="'.$this->encodeAttribute($id) .'"'; + } + if (!empty($classes)) { + $attr_str .= ' class="'. implode(" ", $classes) . '"'; + } + if (!$this->no_markup && !empty($attributes)) { + $attr_str .= ' '.implode(" ", $attributes); + } + return $attr_str; + } + + + protected function stripLinkDefinitions($text) { + # + # Strips link definitions from text, stores the URLs and titles in + # hash references. + # + $less_than_tab = $this->tab_width - 1; + + # Link defs are in the form: ^[id]: url "optional title" + $text = preg_replace_callback('{ + ^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?: # id = $1 + [ ]* + \n? # maybe *one* newline + [ ]* + (?: + <(.+?)> # url = $2 + | + (\S+?) # url = $3 + ) + [ ]* + \n? # maybe one newline + [ ]* + (?: + (?<=\s) # lookbehind for whitespace + ["(] + (.*?) # title = $4 + [")] + [ ]* + )? # title is optional + (?:[ ]* '.$this->id_class_attr_catch_re.' )? # $5 = extra id & class attr + (?:\n+|\Z) + }xm', + array($this, '_stripLinkDefinitions_callback'), + $text); + return $text; + } + protected function _stripLinkDefinitions_callback($matches) { + $link_id = strtolower($matches[1]); + $url = $matches[2] == '' ? $matches[3] : $matches[2]; + $this->urls[$link_id] = $url; + $this->titles[$link_id] =& $matches[4]; + $this->ref_attr[$link_id] = $this->doExtraAttributes("", $dummy =& $matches[5]); + return ''; # String that will replace the block + } + + + ### HTML Block Parser ### + + # Tags that are always treated as block tags: + protected $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure'; + + # Tags treated as block tags only if the opening tag is alone on its line: + protected $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video'; + + # Tags where markdown="1" default to span mode: + protected $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address'; + + # Tags which must not have their contents modified, no matter where + # they appear: + protected $clean_tags_re = 'script|style|math|svg'; + + # Tags that do not need to be closed. + protected $auto_close_tags_re = 'hr|img|param|source|track'; + + + protected function hashHTMLBlocks($text) { + # + # Hashify HTML Blocks and "clean tags". + # + # We only want to do this for block-level HTML tags, such as headers, + # lists, and tables. That's because we still want to wrap

s around + # "paragraphs" that are wrapped in non-block-level tags, such as anchors, + # phrase emphasis, and spans. The list of tags we're looking for is + # hard-coded. + # + # This works by calling _HashHTMLBlocks_InMarkdown, which then calls + # _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1" + # attribute is found within a tag, _HashHTMLBlocks_InHTML calls back + # _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag. + # These two functions are calling each other. It's recursive! + # + if ($this->no_markup) return $text; + + # + # Call the HTML-in-Markdown hasher. + # + list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text); + + return $text; + } + protected function _hashHTMLBlocks_inMarkdown($text, $indent = 0, + $enclosing_tag_re = '', $span = false) + { + # + # Parse markdown text, calling _HashHTMLBlocks_InHTML for block tags. + # + # * $indent is the number of space to be ignored when checking for code + # blocks. This is important because if we don't take the indent into + # account, something like this (which looks right) won't work as expected: + # + #

+ #
+ # Hello World. <-- Is this a Markdown code block or text? + #
<-- Is this a Markdown code block or a real tag? + #
+ # + # If you don't like this, just don't indent the tag on which + # you apply the markdown="1" attribute. + # + # * If $enclosing_tag_re is not empty, stops at the first unmatched closing + # tag with that name. Nested tags supported. + # + # * If $span is true, text inside must treated as span. So any double + # newline will be replaced by a single newline so that it does not create + # paragraphs. + # + # Returns an array of that form: ( processed text , remaining text ) + # + if ($text === '') return array('', ''); + + # Regex to check for the presense of newlines around a block tag. + $newline_before_re = '/(?:^\n?|\n\n)*$/'; + $newline_after_re = + '{ + ^ # Start of text following the tag. + (?>[ ]*)? # Optional comment. + [ ]*\n # Must be followed by newline. + }xs'; + + # Regex to match any tag. + $block_tag_re = + '{ + ( # $2: Capture whole tag. + # Tag name. + '.$this->block_tags_re.' | + '.$this->context_block_tags_re.' | + '.$this->clean_tags_re.' | + (?!\s)'.$enclosing_tag_re.' + ) + (?: + (?=[\s"\'/a-zA-Z0-9]) # Allowed characters after tag name. + (?> + ".*?" | # Double quotes (can contain `>`) + \'.*?\' | # Single quotes (can contain `>`) + .+? # Anything but quotes and `>`. + )*? + )? + > # End of tag. + | + # HTML Comment + | + <\?.*?\?> | <%.*?%> # Processing instruction + | + # CData Block + '. ( !$span ? ' # If not in span. + | + # Indented code block + (?: ^[ ]*\n | ^ | \n[ ]*\n ) + [ ]{'.($indent+4).'}[^\n]* \n + (?> + (?: [ ]{'.($indent+4).'}[^\n]* | [ ]* ) \n + )* + | + # Fenced code block marker + (?<= ^ | \n ) + [ ]{0,'.($indent+3).'}(?:~{3,}|`{3,}) + [ ]* + (?: \.?[-_:a-zA-Z0-9]+ )? # standalone class name + [ ]* + (?: '.$this->id_class_attr_nocatch_re.' )? # extra attributes + [ ]* + (?= \n ) + ' : '' ). ' # End (if not is span). + | + # Code span marker + # Note, this regex needs to go after backtick fenced + # code blocks but it should also be kept outside of the + # "if not in span" condition adding backticks to the parser + `+ + ) + }xs'; + + + $depth = 0; # Current depth inside the tag tree. + $parsed = ""; # Parsed text that will be returned. + + # + # Loop through every tag until we find the closing tag of the parent + # or loop until reaching the end of text if no parent tag specified. + # + do { + # + # Split the text using the first $tag_match pattern found. + # Text before pattern will be first in the array, text after + # pattern will be at the end, and between will be any catches made + # by the pattern. + # + $parts = preg_split($block_tag_re, $text, 2, + PREG_SPLIT_DELIM_CAPTURE); + + # If in Markdown span mode, add a empty-string span-level hash + # after each newline to prevent triggering any block element. + if ($span) { + $void = $this->hashPart("", ':'); + $newline = "$void\n"; + $parts[0] = $void . str_replace("\n", $newline, $parts[0]) . $void; + } + + $parsed .= $parts[0]; # Text before current tag. + + # If end of $text has been reached. Stop loop. + if (count($parts) < 3) { + $text = ""; + break; + } + + $tag = $parts[1]; # Tag to handle. + $text = $parts[2]; # Remaining text after current tag. + $tag_re = preg_quote($tag); # For use in a regular expression. + + # + # Check for: Fenced code block marker. + # Note: need to recheck the whole tag to disambiguate backtick + # fences from code spans + # + if (preg_match('{^\n?([ ]{0,'.($indent+3).'})(~{3,}|`{3,})[ ]*(?:\.?[-_:a-zA-Z0-9]+)?[ ]*(?:'.$this->id_class_attr_nocatch_re.')?[ ]*\n?$}', $tag, $capture)) { + # Fenced code block marker: find matching end marker. + $fence_indent = strlen($capture[1]); # use captured indent in re + $fence_re = $capture[2]; # use captured fence in re + if (preg_match('{^(?>.*\n)*?[ ]{'.($fence_indent).'}'.$fence_re.'[ ]*(?:\n|$)}', $text, + $matches)) + { + # End marker found: pass text unchanged until marker. + $parsed .= $tag . $matches[0]; + $text = substr($text, strlen($matches[0])); + } + else { + # No end marker: just skip it. + $parsed .= $tag; + } + } + # + # Check for: Indented code block. + # + else if ($tag{0} == "\n" || $tag{0} == " ") { + # Indented code block: pass it unchanged, will be handled + # later. + $parsed .= $tag; + } + # + # Check for: Code span marker + # Note: need to check this after backtick fenced code blocks + # + else if ($tag{0} == "`") { + # Find corresponding end marker. + $tag_re = preg_quote($tag); + if (preg_match('{^(?>.+?|\n(?!\n))*?(?block_tags_re.')\b}', $tag) || + ( preg_match('{^<(?:'.$this->context_block_tags_re.')\b}', $tag) && + preg_match($newline_before_re, $parsed) && + preg_match($newline_after_re, $text) ) + ) + { + # Need to parse tag and following text using the HTML parser. + list($block_text, $text) = + $this->_hashHTMLBlocks_inHTML($tag . $text, "hashBlock", true); + + # Make sure it stays outside of any paragraph by adding newlines. + $parsed .= "\n\n$block_text\n\n"; + } + # + # Check for: Clean tag (like script, math) + # HTML Comments, processing instructions. + # + else if (preg_match('{^<(?:'.$this->clean_tags_re.')\b}', $tag) || + $tag{1} == '!' || $tag{1} == '?') + { + # Need to parse tag and following text using the HTML parser. + # (don't check for markdown attribute) + list($block_text, $text) = + $this->_hashHTMLBlocks_inHTML($tag . $text, "hashClean", false); + + $parsed .= $block_text; + } + # + # Check for: Tag with same name as enclosing tag. + # + else if ($enclosing_tag_re !== '' && + # Same name as enclosing tag. + preg_match('{^= 0); + + return array($parsed, $text); + } + protected function _hashHTMLBlocks_inHTML($text, $hash_method, $md_attr) { + # + # Parse HTML, calling _HashHTMLBlocks_InMarkdown for block tags. + # + # * Calls $hash_method to convert any blocks. + # * Stops when the first opening tag closes. + # * $md_attr indicate if the use of the `markdown="1"` attribute is allowed. + # (it is not inside clean tags) + # + # Returns an array of that form: ( processed text , remaining text ) + # + if ($text === '') return array('', ''); + + # Regex to match `markdown` attribute inside of a tag. + $markdown_attr_re = ' + { + \s* # Eat whitespace before the `markdown` attribute + markdown + \s*=\s* + (?> + (["\']) # $1: quote delimiter + (.*?) # $2: attribute value + \1 # matching delimiter + | + ([^\s>]*) # $3: unquoted attribute value + ) + () # $4: make $3 always defined (avoid warnings) + }xs'; + + # Regex to match any tag. + $tag_re = '{ + ( # $2: Capture whole tag. + + ".*?" | # Double quotes (can contain `>`) + \'.*?\' | # Single quotes (can contain `>`) + .+? # Anything but quotes and `>`. + )*? + )? + > # End of tag. + | + # HTML Comment + | + <\?.*?\?> | <%.*?%> # Processing instruction + | + # CData Block + ) + }xs'; + + $original_text = $text; # Save original text in case of faliure. + + $depth = 0; # Current depth inside the tag tree. + $block_text = ""; # Temporary text holder for current text. + $parsed = ""; # Parsed text that will be returned. + + # + # Get the name of the starting tag. + # (This pattern makes $base_tag_name_re safe without quoting.) + # + if (preg_match('/^<([\w:$]*)\b/', $text, $matches)) + $base_tag_name_re = $matches[1]; + + # + # Loop through every tag until we find the corresponding closing tag. + # + do { + # + # Split the text using the first $tag_match pattern found. + # Text before pattern will be first in the array, text after + # pattern will be at the end, and between will be any catches made + # by the pattern. + # + $parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE); + + if (count($parts) < 3) { + # + # End of $text reached with unbalenced tag(s). + # In that case, we return original text unchanged and pass the + # first character as filtered to prevent an infinite loop in the + # parent function. + # + return array($original_text{0}, substr($original_text, 1)); + } + + $block_text .= $parts[0]; # Text before current tag. + $tag = $parts[1]; # Tag to handle. + $text = $parts[2]; # Remaining text after current tag. + + # + # Check for: Auto-close tag (like
) + # Comments and Processing Instructions. + # + if (preg_match('{^auto_close_tags_re.')\b}', $tag) || + $tag{1} == '!' || $tag{1} == '?') + { + # Just add the tag to the block as if it was text. + $block_text .= $tag; + } + else { + # + # Increase/decrease nested tag count. Only do so if + # the tag's name match base tag's. + # + if (preg_match('{^mode = $attr_m[2] . $attr_m[3]; + $span_mode = $this->mode == 'span' || $this->mode != 'block' && + preg_match('{^<(?:'.$this->contain_span_tags_re.')\b}', $tag); + + # Calculate indent before tag. + if (preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches)) { + $strlen = $this->utf8_strlen; + $indent = $strlen($matches[1], 'UTF-8'); + } else { + $indent = 0; + } + + # End preceding block with this tag. + $block_text .= $tag; + $parsed .= $this->$hash_method($block_text); + + # Get enclosing tag name for the ParseMarkdown function. + # (This pattern makes $tag_name_re safe without quoting.) + preg_match('/^<([\w:$]*)\b/', $tag, $matches); + $tag_name_re = $matches[1]; + + # Parse the content using the HTML-in-Markdown parser. + list ($block_text, $text) + = $this->_hashHTMLBlocks_inMarkdown($text, $indent, + $tag_name_re, $span_mode); + + # Outdent markdown text. + if ($indent > 0) { + $block_text = preg_replace("/^[ ]{1,$indent}/m", "", + $block_text); + } + + # Append tag content to parsed text. + if (!$span_mode) $parsed .= "\n\n$block_text\n\n"; + else $parsed .= "$block_text"; + + # Start over with a new block. + $block_text = ""; + } + else $block_text .= $tag; + } + + } while ($depth > 0); + + # + # Hash last block text that wasn't processed inside the loop. + # + $parsed .= $this->$hash_method($block_text); + + return array($parsed, $text); + } + + + protected function hashClean($text) { + # + # Called whenever a tag must be hashed when a function inserts a "clean" tag + # in $text, it passes through this function and is automaticaly escaped, + # blocking invalid nested overlap. + # + return $this->hashPart($text, 'C'); + } + + + protected function doAnchors($text) { + # + # Turn Markdown link shortcuts into XHTML tags. + # + if ($this->in_anchor) return $text; + $this->in_anchor = true; + + # + # First, handle reference-style links: [link text] [id] + # + $text = preg_replace_callback('{ + ( # wrap whole match in $1 + \[ + ('.$this->nested_brackets_re.') # link text = $2 + \] + + [ ]? # one optional space + (?:\n[ ]*)? # one optional newline followed by spaces + + \[ + (.*?) # id = $3 + \] + ) + }xs', + array($this, '_doAnchors_reference_callback'), $text); + + # + # Next, inline-style links: [link text](url "optional title") + # + $text = preg_replace_callback('{ + ( # wrap whole match in $1 + \[ + ('.$this->nested_brackets_re.') # link text = $2 + \] + \( # literal paren + [ \n]* + (?: + <(.+?)> # href = $3 + | + ('.$this->nested_url_parenthesis_re.') # href = $4 + ) + [ \n]* + ( # $5 + ([\'"]) # quote char = $6 + (.*?) # Title = $7 + \6 # matching quote + [ \n]* # ignore any spaces/tabs between closing quote and ) + )? # title is optional + \) + (?:[ ]? '.$this->id_class_attr_catch_re.' )? # $8 = id/class attributes + ) + }xs', + array($this, '_doAnchors_inline_callback'), $text); + + # + # Last, handle reference-style shortcuts: [link text] + # These must come last in case you've also got [link text][1] + # or [link text](/foo) + # + $text = preg_replace_callback('{ + ( # wrap whole match in $1 + \[ + ([^\[\]]+) # link text = $2; can\'t contain [ or ] + \] + ) + }xs', + array($this, '_doAnchors_reference_callback'), $text); + + $this->in_anchor = false; + return $text; + } + protected function _doAnchors_reference_callback($matches) { + $whole_match = $matches[1]; + $link_text = $matches[2]; + $link_id =& $matches[3]; + + if ($link_id == "") { + # for shortcut links like [this][] or [this]. + $link_id = $link_text; + } + + # lower-case and turn embedded newlines into spaces + $link_id = strtolower($link_id); + $link_id = preg_replace('{[ ]?\n}', ' ', $link_id); + + if (isset($this->urls[$link_id])) { + $url = $this->urls[$link_id]; + $url = $this->encodeURLAttribute($url); + + $result = "titles[$link_id] ) ) { + $title = $this->titles[$link_id]; + $title = $this->encodeAttribute($title); + $result .= " title=\"$title\""; + } + if (isset($this->ref_attr[$link_id])) + $result .= $this->ref_attr[$link_id]; + + $link_text = $this->runSpanGamut($link_text); + $result .= ">$link_text"; + $result = $this->hashPart($result); + } + else { + $result = $whole_match; + } + return $result; + } + protected function _doAnchors_inline_callback($matches) { + $whole_match = $matches[1]; + $link_text = $this->runSpanGamut($matches[2]); + $url = $matches[3] == '' ? $matches[4] : $matches[3]; + $title =& $matches[7]; + $attr = $this->doExtraAttributes("a", $dummy =& $matches[8]); + + // if the URL was of the form it got caught by the HTML + // tag parser and hashed. Need to reverse the process before using the URL. + $unhashed = $this->unhash($url); + if ($unhashed != $url) + $url = preg_replace('/^<(.*)>$/', '\1', $unhashed); + + $url = $this->encodeURLAttribute($url); + + $result = "encodeAttribute($title); + $result .= " title=\"$title\""; + } + $result .= $attr; + + $link_text = $this->runSpanGamut($link_text); + $result .= ">$link_text"; + + return $this->hashPart($result); + } + + + protected function doImages($text) { + # + # Turn Markdown image shortcuts into tags. + # + # + # First, handle reference-style labeled images: ![alt text][id] + # + $text = preg_replace_callback('{ + ( # wrap whole match in $1 + !\[ + ('.$this->nested_brackets_re.') # alt text = $2 + \] + + [ ]? # one optional space + (?:\n[ ]*)? # one optional newline followed by spaces + + \[ + (.*?) # id = $3 + \] + + ) + }xs', + array($this, '_doImages_reference_callback'), $text); + + # + # Next, handle inline images: ![alt text](url "optional title") + # Don't forget: encode * and _ + # + $text = preg_replace_callback('{ + ( # wrap whole match in $1 + !\[ + ('.$this->nested_brackets_re.') # alt text = $2 + \] + \s? # One optional whitespace character + \( # literal paren + [ \n]* + (?: + <(\S*)> # src url = $3 + | + ('.$this->nested_url_parenthesis_re.') # src url = $4 + ) + [ \n]* + ( # $5 + ([\'"]) # quote char = $6 + (.*?) # title = $7 + \6 # matching quote + [ \n]* + )? # title is optional + \) + (?:[ ]? '.$this->id_class_attr_catch_re.' )? # $8 = id/class attributes + ) + }xs', + array($this, '_doImages_inline_callback'), $text); + + return $text; + } + protected function _doImages_reference_callback($matches) { + $whole_match = $matches[1]; + $alt_text = $matches[2]; + $link_id = strtolower($matches[3]); + + if ($link_id == "") { + $link_id = strtolower($alt_text); # for shortcut links like ![this][]. + } + + $alt_text = $this->encodeAttribute($alt_text); + if (isset($this->urls[$link_id])) { + $url = $this->encodeURLAttribute($this->urls[$link_id]); + $result = "\"$alt_text\"";titles[$link_id])) { + $title = $this->titles[$link_id]; + $title = $this->encodeAttribute($title); + $result .= " title=\"$title\""; + } + if (isset($this->ref_attr[$link_id])) + $result .= $this->ref_attr[$link_id]; + $result .= $this->empty_element_suffix; + $result = $this->hashPart($result); + } + else { + # If there's no such link ID, leave intact: + $result = $whole_match; + } + + return $result; + } + protected function _doImages_inline_callback($matches) { + $whole_match = $matches[1]; + $alt_text = $matches[2]; + $url = $matches[3] == '' ? $matches[4] : $matches[3]; + $title =& $matches[7]; + $attr = $this->doExtraAttributes("img", $dummy =& $matches[8]); + + $alt_text = $this->encodeAttribute($alt_text); + $url = $this->encodeURLAttribute($url); + $result = "\"$alt_text\"";encodeAttribute($title); + $result .= " title=\"$title\""; # $title already quoted + } + $result .= $attr; + $result .= $this->empty_element_suffix; + + return $this->hashPart($result); + } + + + protected function doHeaders($text) { + # + # Redefined to add id and class attribute support. + # + # Setext-style headers: + # Header 1 {#header1} + # ======== + # + # Header 2 {#header2 .class1 .class2} + # -------- + # + $text = preg_replace_callback( + '{ + (^.+?) # $1: Header text + (?:[ ]+ '.$this->id_class_attr_catch_re.' )? # $3 = id/class attributes + [ ]*\n(=+|-+)[ ]*\n+ # $3: Header footer + }mx', + array($this, '_doHeaders_callback_setext'), $text); + + # atx-style headers: + # # Header 1 {#header1} + # ## Header 2 {#header2} + # ## Header 2 with closing hashes ## {#header3.class1.class2} + # ... + # ###### Header 6 {.class2} + # + $text = preg_replace_callback('{ + ^(\#{1,6}) # $1 = string of #\'s + [ ]* + (.+?) # $2 = Header text + [ ]* + \#* # optional closing #\'s (not counted) + (?:[ ]+ '.$this->id_class_attr_catch_re.' )? # $3 = id/class attributes + [ ]* + \n+ + }xm', + array($this, '_doHeaders_callback_atx'), $text); + + return $text; + } + protected function _doHeaders_callback_setext($matches) { + if ($matches[3] == '-' && preg_match('{^- }', $matches[1])) + return $matches[0]; + + $level = $matches[3]{0} == '=' ? 1 : 2; + + $defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[1]) : null; + + $attr = $this->doExtraAttributes("h$level", $dummy =& $matches[2], $defaultId); + $block = "".$this->runSpanGamut($matches[1]).""; + return "\n" . $this->hashBlock($block) . "\n\n"; + } + protected function _doHeaders_callback_atx($matches) { + $level = strlen($matches[1]); + + $defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[2]) : null; + $attr = $this->doExtraAttributes("h$level", $dummy =& $matches[3], $defaultId); + $block = "".$this->runSpanGamut($matches[2]).""; + return "\n" . $this->hashBlock($block) . "\n\n"; + } + + + protected function doTables($text) { + # + # Form HTML tables. + # + $less_than_tab = $this->tab_width - 1; + # + # Find tables with leading pipe. + # + # | Header 1 | Header 2 + # | -------- | -------- + # | Cell 1 | Cell 2 + # | Cell 3 | Cell 4 + # + $text = preg_replace_callback(' + { + ^ # Start of a line + [ ]{0,'.$less_than_tab.'} # Allowed whitespace. + [|] # Optional leading pipe (present) + (.+) \n # $1: Header row (at least one pipe) + + [ ]{0,'.$less_than_tab.'} # Allowed whitespace. + [|] ([ ]*[-:]+[-| :]*) \n # $2: Header underline + + ( # $3: Cells + (?> + [ ]* # Allowed whitespace. + [|] .* \n # Row content. + )* + ) + (?=\n|\Z) # Stop at final double newline. + }xm', + array($this, '_doTable_leadingPipe_callback'), $text); + + # + # Find tables without leading pipe. + # + # Header 1 | Header 2 + # -------- | -------- + # Cell 1 | Cell 2 + # Cell 3 | Cell 4 + # + $text = preg_replace_callback(' + { + ^ # Start of a line + [ ]{0,'.$less_than_tab.'} # Allowed whitespace. + (\S.*[|].*) \n # $1: Header row (at least one pipe) + + [ ]{0,'.$less_than_tab.'} # Allowed whitespace. + ([-:]+[ ]*[|][-| :]*) \n # $2: Header underline + + ( # $3: Cells + (?> + .* [|] .* \n # Row content + )* + ) + (?=\n|\Z) # Stop at final double newline. + }xm', + array($this, '_DoTable_callback'), $text); + + return $text; + } + protected function _doTable_leadingPipe_callback($matches) { + $head = $matches[1]; + $underline = $matches[2]; + $content = $matches[3]; + + # Remove leading pipe for each row. + $content = preg_replace('/^ *[|]/m', '', $content); + + return $this->_doTable_callback(array($matches[0], $head, $underline, $content)); + } + protected function _doTable_makeAlignAttr($alignname) + { + if (empty($this->table_align_class_tmpl)) + return " align=\"$alignname\""; + + $classname = str_replace('%%', $alignname, $this->table_align_class_tmpl); + return " class=\"$classname\""; + } + protected function _doTable_callback($matches) { + $head = $matches[1]; + $underline = $matches[2]; + $content = $matches[3]; + + # Remove any tailing pipes for each line. + $head = preg_replace('/[|] *$/m', '', $head); + $underline = preg_replace('/[|] *$/m', '', $underline); + $content = preg_replace('/[|] *$/m', '', $content); + + # Reading alignement from header underline. + $separators = preg_split('/ *[|] */', $underline); + foreach ($separators as $n => $s) { + if (preg_match('/^ *-+: *$/', $s)) + $attr[$n] = $this->_doTable_makeAlignAttr('right'); + else if (preg_match('/^ *:-+: *$/', $s)) + $attr[$n] = $this->_doTable_makeAlignAttr('center'); + else if (preg_match('/^ *:-+ *$/', $s)) + $attr[$n] = $this->_doTable_makeAlignAttr('left'); + else + $attr[$n] = ''; + } + + # Parsing span elements, including code spans, character escapes, + # and inline HTML tags, so that pipes inside those gets ignored. + $head = $this->parseSpan($head); + $headers = preg_split('/ *[|] */', $head); + $col_count = count($headers); + $attr = array_pad($attr, $col_count, ''); + + # Write column headers. + $text = "\n"; + $text .= "\n"; + $text .= "\n"; + foreach ($headers as $n => $header) + $text .= " ".$this->runSpanGamut(trim($header))."\n"; + $text .= "\n"; + $text .= "\n"; + + # Split content by row. + $rows = explode("\n", trim($content, "\n")); + + $text .= "\n"; + foreach ($rows as $row) { + # Parsing span elements, including code spans, character escapes, + # and inline HTML tags, so that pipes inside those gets ignored. + $row = $this->parseSpan($row); + + # Split row by cell. + $row_cells = preg_split('/ *[|] */', $row, $col_count); + $row_cells = array_pad($row_cells, $col_count, ''); + + $text .= "\n"; + foreach ($row_cells as $n => $cell) + $text .= " ".$this->runSpanGamut(trim($cell))."\n"; + $text .= "\n"; + } + $text .= "\n"; + $text .= "
"; + + return $this->hashBlock($text) . "\n"; + } + + + protected function doDefLists($text) { + # + # Form HTML definition lists. + # + $less_than_tab = $this->tab_width - 1; + + # Re-usable pattern to match any entire dl list: + $whole_list_re = '(?> + ( # $1 = whole list + ( # $2 + [ ]{0,'.$less_than_tab.'} + ((?>.*\S.*\n)+) # $3 = defined term + \n? + [ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition + ) + (?s:.+?) + ( # $4 + \z + | + \n{2,} + (?=\S) + (?! # Negative lookahead for another term + [ ]{0,'.$less_than_tab.'} + (?: \S.*\n )+? # defined term + \n? + [ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition + ) + (?! # Negative lookahead for another definition + [ ]{0,'.$less_than_tab.'}:[ ]+ # colon starting definition + ) + ) + ) + )'; // mx + + $text = preg_replace_callback('{ + (?>\A\n?|(?<=\n\n)) + '.$whole_list_re.' + }mx', + array($this, '_doDefLists_callback'), $text); + + return $text; + } + protected function _doDefLists_callback($matches) { + # Re-usable patterns to match list item bullets and number markers: + $list = $matches[1]; + + # Turn double returns into triple returns, so that we can make a + # paragraph for the last item in a list, if necessary: + $result = trim($this->processDefListItems($list)); + $result = "
\n" . $result . "\n
"; + return $this->hashBlock($result) . "\n\n"; + } + + + protected function processDefListItems($list_str) { + # + # Process the contents of a single definition list, splitting it + # into individual term and definition list items. + # + $less_than_tab = $this->tab_width - 1; + + # trim trailing blank lines: + $list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str); + + # Process definition terms. + $list_str = preg_replace_callback('{ + (?>\A\n?|\n\n+) # leading line + ( # definition terms = $1 + [ ]{0,'.$less_than_tab.'} # leading whitespace + (?!\:[ ]|[ ]) # negative lookahead for a definition + # mark (colon) or more whitespace. + (?> \S.* \n)+? # actual term (not whitespace). + ) + (?=\n?[ ]{0,3}:[ ]) # lookahead for following line feed + # with a definition mark. + }xm', + array($this, '_processDefListItems_callback_dt'), $list_str); + + # Process actual definitions. + $list_str = preg_replace_callback('{ + \n(\n+)? # leading line = $1 + ( # marker space = $2 + [ ]{0,'.$less_than_tab.'} # whitespace before colon + \:[ ]+ # definition mark (colon) + ) + ((?s:.+?)) # definition text = $3 + (?= \n+ # stop at next definition mark, + (?: # next term or end of text + [ ]{0,'.$less_than_tab.'} \:[ ] | +
| \z + ) + ) + }xm', + array($this, '_processDefListItems_callback_dd'), $list_str); + + return $list_str; + } + protected function _processDefListItems_callback_dt($matches) { + $terms = explode("\n", trim($matches[1])); + $text = ''; + foreach ($terms as $term) { + $term = $this->runSpanGamut(trim($term)); + $text .= "\n
" . $term . "
"; + } + return $text . "\n"; + } + protected function _processDefListItems_callback_dd($matches) { + $leading_line = $matches[1]; + $marker_space = $matches[2]; + $def = $matches[3]; + + if ($leading_line || preg_match('/\n{2,}/', $def)) { + # Replace marker with the appropriate whitespace indentation + $def = str_repeat(' ', strlen($marker_space)) . $def; + $def = $this->runBlockGamut($this->outdent($def . "\n\n")); + $def = "\n". $def ."\n"; + } + else { + $def = rtrim($def); + $def = $this->runSpanGamut($this->outdent($def)); + } + + return "\n
" . $def . "
\n"; + } + + + protected function doFencedCodeBlocks($text) { + # + # Adding the fenced code block syntax to regular Markdown: + # + # ~~~ + # Code block + # ~~~ + # + $less_than_tab = $this->tab_width; + + $text = preg_replace_callback('{ + (?:\n|\A) + # 1: Opening marker + ( + (?:~{3,}|`{3,}) # 3 or more tildes/backticks. + ) + [ ]* + (?: + \.?([-_:a-zA-Z0-9]+) # 2: standalone class name + )? + [ ]* + (?: + '.$this->id_class_attr_catch_re.' # 3: Extra attributes + )? + [ ]* \n # Whitespace and newline following marker. + + # 4: Content + ( + (?> + (?!\1 [ ]* \n) # Not a closing marker. + .*\n+ + )+ + ) + + # Closing marker. + \1 [ ]* (?= \n ) + }xm', + array($this, '_doFencedCodeBlocks_callback'), $text); + + return $text; + } + protected function _doFencedCodeBlocks_callback($matches) { + $classname =& $matches[2]; + $attrs =& $matches[3]; + $codeblock = $matches[4]; + + if ($this->code_block_content_func) { + $codeblock = call_user_func($this->code_block_content_func, $codeblock, $classname); + } else { + $codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES); + } + + $codeblock = preg_replace_callback('/^\n+/', + array($this, '_doFencedCodeBlocks_newlines'), $codeblock); + + $classes = array(); + if ($classname != "") { + if ($classname{0} == '.') + $classname = substr($classname, 1); + $classes[] = $this->code_class_prefix.$classname; + } + $attr_str = $this->doExtraAttributes($this->code_attr_on_pre ? "pre" : "code", $attrs, null, $classes); + $pre_attr_str = $this->code_attr_on_pre ? $attr_str : ''; + $code_attr_str = $this->code_attr_on_pre ? '' : $attr_str; + $codeblock = "$codeblock"; + + return "\n\n".$this->hashBlock($codeblock)."\n\n"; + } + protected function _doFencedCodeBlocks_newlines($matches) { + return str_repeat("empty_element_suffix", + strlen($matches[0])); + } + + + # + # Redefining emphasis markers so that emphasis by underscore does not + # work in the middle of a word. + # + protected $em_relist = array( + '' => '(?:(? '(? '(? '(?:(? '(? '(? '(?:(? '(? '(? tags + # + # Strip leading and trailing lines: + $text = preg_replace('/\A\n+|\n+\z/', '', $text); + + $grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY); + + # + # Wrap

tags and unhashify HTML blocks + # + foreach ($grafs as $key => $value) { + $value = trim($this->runSpanGamut($value)); + + # Check if this should be enclosed in a paragraph. + # Clean tag hashes & block tag hashes are left alone. + $is_p = !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value); + + if ($is_p) { + $value = "

$value

"; + } + $grafs[$key] = $value; + } + + # Join grafs in one text, then unhash HTML tags. + $text = implode("\n\n", $grafs); + + # Finish by removing any tag hashes still present in $text. + $text = $this->unhash($text); + + return $text; + } + + + ### Footnotes + + protected function stripFootnotes($text) { + # + # Strips link definitions from text, stores the URLs and titles in + # hash references. + # + $less_than_tab = $this->tab_width - 1; + + # Link defs are in the form: [^id]: url "optional title" + $text = preg_replace_callback('{ + ^[ ]{0,'.$less_than_tab.'}\[\^(.+?)\][ ]?: # note_id = $1 + [ ]* + \n? # maybe *one* newline + ( # text = $2 (no blank lines allowed) + (?: + .+ # actual text + | + \n # newlines but + (?!\[.+?\][ ]?:\s)# negative lookahead for footnote or link definition marker. + (?!\n+[ ]{0,3}\S)# ensure line is not blank and followed + # by non-indented content + )* + ) + }xm', + array($this, '_stripFootnotes_callback'), + $text); + return $text; + } + protected function _stripFootnotes_callback($matches) { + $note_id = $this->fn_id_prefix . $matches[1]; + $this->footnotes[$note_id] = $this->outdent($matches[2]); + return ''; # String that will replace the block + } + + + protected function doFootnotes($text) { + # + # Replace footnote references in $text [^id] with a special text-token + # which will be replaced by the actual footnote marker in appendFootnotes. + # + if (!$this->in_anchor) { + $text = preg_replace('{\[\^(.+?)\]}', "F\x1Afn:\\1\x1A:", $text); + } + return $text; + } + + + protected function appendFootnotes($text) { + # + # Append footnote list to text. + # + $text = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', + array($this, '_appendFootnotes_callback'), $text); + + if (!empty($this->footnotes_ordered)) { + $text .= "\n\n"; + $text .= "
\n"; + $text .= "empty_element_suffix ."\n"; + $text .= "
    \n\n"; + + $attr = ""; + if ($this->fn_backlink_class != "") { + $class = $this->fn_backlink_class; + $class = $this->encodeAttribute($class); + $attr .= " class=\"$class\""; + } + if ($this->fn_backlink_title != "") { + $title = $this->fn_backlink_title; + $title = $this->encodeAttribute($title); + $attr .= " title=\"$title\""; + } + $backlink_text = $this->fn_backlink_html; + $num = 0; + + while (!empty($this->footnotes_ordered)) { + $footnote = reset($this->footnotes_ordered); + $note_id = key($this->footnotes_ordered); + unset($this->footnotes_ordered[$note_id]); + $ref_count = $this->footnotes_ref_count[$note_id]; + unset($this->footnotes_ref_count[$note_id]); + unset($this->footnotes[$note_id]); + + $footnote .= "\n"; # Need to append newline before parsing. + $footnote = $this->runBlockGamut("$footnote\n"); + $footnote = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}', + array($this, '_appendFootnotes_callback'), $footnote); + + $attr = str_replace("%%", ++$num, $attr); + $note_id = $this->encodeAttribute($note_id); + + # Prepare backlink, multiple backlinks if multiple references + $backlink = "$backlink_text"; + for ($ref_num = 2; $ref_num <= $ref_count; ++$ref_num) { + $backlink .= " $backlink_text"; + } + # Add backlink to last paragraph; create new paragraph if needed. + if (preg_match('{

    $}', $footnote)) { + $footnote = substr($footnote, 0, -4) . " $backlink

    "; + } else { + $footnote .= "\n\n

    $backlink

    "; + } + + $text .= "
  1. \n"; + $text .= $footnote . "\n"; + $text .= "
    2. \n\n"; + } + + $text .= "
\n"; + $text .= "
"; + } + return $text; + } + protected function _appendFootnotes_callback($matches) { + $node_id = $this->fn_id_prefix . $matches[1]; + + # Create footnote marker only if it has a corresponding footnote *and* + # the footnote hasn't been used by another marker. + if (isset($this->footnotes[$node_id])) { + $num =& $this->footnotes_numbers[$node_id]; + if (!isset($num)) { + # Transfer footnote content to the ordered list and give it its + # number + $this->footnotes_ordered[$node_id] = $this->footnotes[$node_id]; + $this->footnotes_ref_count[$node_id] = 1; + $num = $this->footnote_counter++; + $ref_count_mark = ''; + } else { + $ref_count_mark = $this->footnotes_ref_count[$node_id] += 1; + } + + $attr = ""; + if ($this->fn_link_class != "") { + $class = $this->fn_link_class; + $class = $this->encodeAttribute($class); + $attr .= " class=\"$class\""; + } + if ($this->fn_link_title != "") { + $title = $this->fn_link_title; + $title = $this->encodeAttribute($title); + $attr .= " title=\"$title\""; + } + + $attr = str_replace("%%", $num, $attr); + $node_id = $this->encodeAttribute($node_id); + + return + "". + "$num". + ""; + } + + return "[^".$matches[1]."]"; + } + + + ### Abbreviations ### + + protected function stripAbbreviations($text) { + # + # Strips abbreviations from text, stores titles in hash references. + # + $less_than_tab = $this->tab_width - 1; + + # Link defs are in the form: [id]*: url "optional title" + $text = preg_replace_callback('{ + ^[ ]{0,'.$less_than_tab.'}\*\[(.+?)\][ ]?: # abbr_id = $1 + (.*) # text = $2 (no blank lines allowed) + }xm', + array($this, '_stripAbbreviations_callback'), + $text); + return $text; + } + protected function _stripAbbreviations_callback($matches) { + $abbr_word = $matches[1]; + $abbr_desc = $matches[2]; + if ($this->abbr_word_re) + $this->abbr_word_re .= '|'; + $this->abbr_word_re .= preg_quote($abbr_word); + $this->abbr_desciptions[$abbr_word] = trim($abbr_desc); + return ''; # String that will replace the block + } + + + protected function doAbbreviations($text) { + # + # Find defined abbreviations in text and wrap them in elements. + # + if ($this->abbr_word_re) { + // cannot use the /x modifier because abbr_word_re may + // contain significant spaces: + $text = preg_replace_callback('{'. + '(?abbr_word_re.')'. + '(?![\w\x1A])'. + '}', + array($this, '_doAbbreviations_callback'), $text); + } + return $text; + } + protected function _doAbbreviations_callback($matches) { + $abbr = $matches[0]; + if (isset($this->abbr_desciptions[$abbr])) { + $desc = $this->abbr_desciptions[$abbr]; + if (empty($desc)) { + return $this->hashPart("$abbr"); + } else { + $desc = $this->encodeAttribute($desc); + return $this->hashPart("$abbr"); + } + } else { + return $matches[0]; + } + } } - diff --git a/extlib/Michelf/MarkdownInterface.php b/extlib/Michelf/MarkdownInterface.php index e4c2931f32..4e0738ec20 100644 --- a/extlib/Michelf/MarkdownInterface.php +++ b/extlib/Michelf/MarkdownInterface.php @@ -3,12 +3,12 @@ # Markdown - A text-to-HTML conversion tool for web writers # # PHP Markdown -# Copyright (c) 2004-2014 Michel Fortin -# +# Copyright (c) 2004-2015 Michel Fortin +# # # Original Markdown # Copyright (c) 2004-2006 John Gruber -# +# # namespace Michelf; diff --git a/extlib/PHP_Markdown_License.text b/extlib/PHP_Markdown_License.text deleted file mode 100644 index fbde2c04d1..0000000000 --- a/extlib/PHP_Markdown_License.text +++ /dev/null @@ -1,36 +0,0 @@ -PHP Markdown -Copyright (c) 2004-2008 Michel Fortin - -All rights reserved. - -Based on Markdown -Copyright (c) 2003-2006 John Gruber - -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are -met: - -* Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - -* Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - -* Neither the name "Markdown" nor the names of its contributors may - be used to endorse or promote products derived from this software - without specific prior written permission. - -This software is provided by the copyright holders and contributors "as -is" and any express or implied warranties, including, but not limited -to, the implied warranties of merchantability and fitness for a -particular purpose are disclaimed. In no event shall the copyright owner -or contributors be liable for any direct, indirect, incidental, special, -exemplary, or consequential damages (including, but not limited to, -procurement of substitute goods or services; loss of use, data, or -profits; or business interruption) however caused and on any theory of -liability, whether in contract, strict liability, or tort (including -negligence or otherwise) arising in any way out of the use of this -software, even if advised of the possibility of such damage.