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Diffstat (limited to 'framework/3rdParty/Markdown/MarkdownParser.php')
| -rw-r--r-- | framework/3rdParty/Markdown/MarkdownParser.php | 1256 |
1 files changed, 0 insertions, 1256 deletions
diff --git a/framework/3rdParty/Markdown/MarkdownParser.php b/framework/3rdParty/Markdown/MarkdownParser.php deleted file mode 100644 index b581dcb5..00000000 --- a/framework/3rdParty/Markdown/MarkdownParser.php +++ /dev/null @@ -1,1256 +0,0 @@ -<?php - -# -# Markdown - A text-to-HTML conversion tool for web writers -# -# Copyright (c) 2004-2005 John Gruber -# <http://daringfireball.net/projects/markdown/> -# -# Copyright (c) 2004-2005 Michel Fortin - PHP Port -# <http://www.michelf.com/projects/php-markdown/> -# - -/** - * PHP5 version of the markdown parser. - * Usage: - * <code> - * $markdown = new MarkdownParser; - * echo $markdown->parse($text); - * </code> - */ -class MarkdownParser -{ - private static $md_nested_brackets; - private static $md_escape_table = array(); - private static $md_backslash_escape_table = array(); - private static $md_nested_brackets_depth = 6; - - protected $md_empty_element_suffix = " />"; # Change to ">" for HTML output - protected $md_tab_width = 4; - - private $md_list_level = 0; - private $md_urls = array(); - private $md_titles = array(); - private $md_html_blocks = array(); - - public function __construct() - { - if(is_null(self::$md_nested_brackets)) - $this->initialize(); - } - - private function initialize() - { - self::$md_nested_brackets = - str_repeat('(?>[^\[\]]+|\[', self::$md_nested_brackets_depth). - str_repeat('\])*', self::$md_nested_brackets_depth); - - self::$md_escape_table = array( - "\\" => md5("\\"), - "`" => md5("`"), - "*" => md5("*"), - "_" => md5("_"), - "{" => md5("{"), - "}" => md5("}"), - "[" => md5("["), - "]" => md5("]"), - "(" => md5("("), - ")" => md5(")"), - ">" => md5(">"), - "#" => md5("#"), - "+" => md5("+"), - "-" => md5("-"), - "." => md5("."), - "!" => md5("!") - ); - - # Table of hash values for escaped characters: - # Create an identical table but for escaped characters. - foreach (self::$md_escape_table as $key => $char) - self::$md_backslash_escape_table["\\$key"] = $char; - } - - public function parse($text) - { - # - # Main function. The order in which other subs are called here is - # essential. Link and image substitutions need to happen before - # _EscapeSpecialCharsWithinTagAttributes(), so that any *'s or _'s in the <a> - # and <img> tags get encoded. - # - # Clear the hashes. If we don't clear these, you get conflicts - # from other articles when generating a page which contains more than - # one article (e.g. an index page that shows the N most recent - # articles): - $this->md_urls = array(); - $this->md_titles = array(); - $this->md_html_blocks = array(); - - # Standardize line endings: - # DOS to Unix and Mac to Unix - $text = str_replace(array("\r\n", "\r"), "\n", $text); - - # Make sure $text ends with a couple of newlines: - $text .= "\n\n"; - - # Convert all tabs to spaces. - $text = $this->_Detab($text); - - # Strip any lines consisting only of spaces and tabs. - # This makes subsequent regexen easier to write, because we can - # match consecutive blank lines with /\n+/ instead of something - # contorted like /[ \t]*\n+/ . - $text = preg_replace('/^[ \t]+$/m', '', $text); - - # Turn block-level HTML blocks into hash entries - $text = $this->_HashHTMLBlocks($text); - - # Strip link definitions, store in hashes. - $text = $this->_StripLinkDefinitions($text); - - $text = $this->_RunBlockGamut($text); - - $text = $this->_UnescapeSpecialChars($text); - - return $text . "\n"; - } - - - private function _StripLinkDefinitions($text) { - # - # Strips link definitions from text, stores the URLs and titles in - # hash references. - # - $less_than_tab = $this->md_tab_width - 1; - - # Link defs are in the form: ^[id]: url "optional title" - $text = preg_replace_callback('{ - ^[ ]{0,'.$less_than_tab.'}\[(.+)\]: # id = $1 - [ \t]* - \n? # maybe *one* newline - [ \t]* - <?(\S+?)>? # url = $2 - [ \t]* - \n? # maybe one newline - [ \t]* - (?: - (?<=\s) # lookbehind for whitespace - ["(] - (.+?) # title = $3 - [")] - [ \t]* - )? # title is optional - (?:\n+|\Z) - }xm', - array($this,'_StripLinkDefinitions_callback'), - $text); - return $text; - } - - private function _StripLinkDefinitions_callback($matches) { - $link_id = strtolower($matches[1]); - $this->md_urls[$link_id] = $this->_EncodeAmpsAndAngles($matches[2]); - if (isset($matches[3])) - $this->md_titles[$link_id] = str_replace('"', '"', $matches[3]); - return ''; # String that will replace the block - } - - - private function _HashHTMLBlocks($text) { - $less_than_tab = $this->md_tab_width - 1; - - # Hashify HTML blocks: - # 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 <p>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: - $block_tags_a = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|'. - 'script|noscript|form|fieldset|iframe|math|ins|del'; - $block_tags_b = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|'. - 'script|noscript|form|fieldset|iframe|math'; - - # First, look for nested blocks, e.g.: - # <div> - # <div> - # tags for inner block must be indented. - # </div> - # </div> - # - # The outermost tags must start at the left margin for this to match, and - # the inner nested divs must be indented. - # We need to do this before the next, more liberal match, because the next - # match will start at the first `<div>` and stop at the first `</div>`. - $text = preg_replace_callback("{ - ( # save in $1 - ^ # start of line (with /m) - <($block_tags_a) # start tag = $2 - \\b # word break - (.*\\n)*? # any number of lines, minimally matching - </\\2> # the matching end tag - [ \\t]* # trailing spaces/tabs - (?=\\n+|\\Z) # followed by a newline or end of document - ) - }xm", - array($this,'_HashHTMLBlocks_callback'), - $text); - - # - # Now match more liberally, simply from `\n<tag>` to `</tag>\n` - # - $text = preg_replace_callback("{ - ( # save in $1 - ^ # start of line (with /m) - <($block_tags_b) # start tag = $2 - \\b # word break - (.*\\n)*? # any number of lines, minimally matching - .*</\\2> # the matching end tag - [ \\t]* # trailing spaces/tabs - (?=\\n+|\\Z) # followed by a newline or end of document - ) - }xm", - array($this,'_HashHTMLBlocks_callback'), - $text); - - # Special case just for <hr />. It was easier to make a special case than - # to make the other regex more complicated. - $text = preg_replace_callback('{ - (?: - (?<=\n\n) # Starting after a blank line - | # or - \A\n? # the beginning of the doc - ) - ( # save in $1 - [ ]{0,'.$less_than_tab.'} - <(hr) # start tag = $2 - \b # word break - ([^<>])*? # - /?> # the matching end tag - [ \t]* - (?=\n{2,}|\Z) # followed by a blank line or end of document - ) - }x', - array($this,'_HashHTMLBlocks_callback'), - $text); - - # Special case for standalone HTML comments: - $text = preg_replace_callback('{ - (?: - (?<=\n\n) # Starting after a blank line - | # or - \A\n? # the beginning of the doc - ) - ( # save in $1 - [ ]{0,'.$less_than_tab.'} - (?s: - <! - (--.*?--\s*)+ - > - ) - [ \t]* - (?=\n{2,}|\Z) # followed by a blank line or end of document - ) - }x', - array($this,'_HashHTMLBlocks_callback'), - $text); - - return $text; - } - private function _HashHTMLBlocks_callback($matches) { - $text = $matches[1]; - $key = md5($text); - $this->md_html_blocks[$key] = $text; - return "\n\n$key\n\n"; # String that will replace the block - } - - - private function _RunBlockGamut($text) { - # - # These are all the transformations that form block-level - # tags like paragraphs, headers, and list items. - # - $text = $this->_DoHeaders($text); - - # Do Horizontal Rules: - $text = preg_replace( - array('{^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$}mx', - '{^[ ]{0,2}([ ]? -[ ]?){3,}[ \t]*$}mx', - '{^[ ]{0,2}([ ]? _[ ]?){3,}[ \t]*$}mx'), - "\n<hr{$this->md_empty_element_suffix}\n", - $text); - - $text = $this->_DoLists($text); - $text = $this->_DoCodeBlocks($text); - $text = $this->_DoBlockQuotes($text); - - # We already ran _HashHTMLBlocks() before, in Markdown(), but that - # was to escape raw HTML in the original Markdown source. This time, - # we're escaping the markup we've just created, so that we don't wrap - # <p> tags around block-level tags. - $text = $this->_HashHTMLBlocks($text); - $text = $this->_FormParagraphs($text); - - return $text; - } - - - private function _RunSpanGamut($text) { - # - # These are all the transformations that occur *within* block-level - # tags like paragraphs, headers, and list items. - # - - $text = $this->_DoCodeSpans($text); - - $text = $this->_EscapeSpecialChars($text); - - # Process anchor and image tags. Images must come first, - # because ![foo][f] looks like an anchor. - $text = $this->_DoImages($text); - $text = $this->_DoAnchors($text); - - # Make links out of things like `<http://example.com/>` - # Must come after _DoAnchors(), because you can use < and > - # delimiters in inline links like [this](<url>). - $text = $this->_DoAutoLinks($text); - $text = $this->_EncodeAmpsAndAngles($text); - $text = $this->_DoItalicsAndBold($text); - - # Do hard breaks: - $text = preg_replace('/ {2,}\n/', "<br{$this->md_empty_element_suffix}\n", $text); - - return $text; - } - - - private function _EscapeSpecialChars($text) { - $tokens = $this->_TokenizeHTML($text); - - $text = ''; # rebuild $text from the tokens - # $in_pre = 0; # Keep track of when we're inside <pre> or <code> tags. - # $tags_to_skip = "!<(/?)(?:pre|code|kbd|script|math)[\s>]!"; - - foreach ($tokens as $cur_token) { - if ($cur_token[0] == 'tag') { - # Within tags, encode * and _ so they don't conflict - # with their use in Markdown for italics and strong. - # We're replacing each such character with its - # corresponding MD5 checksum value; this is likely - # overkill, but it should prevent us from colliding - # with the escape values by accident. - $cur_token[1] = str_replace(array('*', '_'), - array(self::$md_escape_table['*'], self::$md_escape_table['_']), - $cur_token[1]); - $text .= $cur_token[1]; - } else { - $t = $cur_token[1]; - $t = $this->_EncodeBackslashEscapes($t); - $text .= $t; - } - } - return $text; - } - - - private function _DoAnchors($text) { - # - # Turn Markdown link shortcuts into XHTML <a> tags. - # - # - # First, handle reference-style links: [link text] [id] - # - $bracket = self::$md_nested_brackets; - $text = preg_replace_callback("{ - ( # wrap whole match in $1 - \\[ - ({$bracket}) # 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 $1 - \\[ - ({$bracket}) # link text = $2 - \\] - \\( # literal paren - [ \\t]* - <?(.*?)>? # href = $3 - [ \\t]* - ( # $4 - (['\"]) # quote char = $5 - (.*?) # Title = $6 - \\5 # matching quote - )? # title is optional - \\) - ) - }xs", - array($this,'_DoAnchors_inline_callback'), $text); - - return $text; - } - private function _DoAnchors_reference_callback($matches) { - $whole_match = $matches[1]; - $link_text = $matches[2]; - $link_id = strtolower($matches[3]); - - if ($link_id == "") { - $link_id = strtolower($link_text); # for shortcut links like [this][]. - } - - if (isset($this->md_urls[$link_id])) { - $url = $this->md_urls[$link_id]; - # We've got to encode these to avoid conflicting with italics/bold. - $url = str_replace(array('*', '_'), - array(self::$md_escape_table['*'], self::$md_escape_table['_']), - $url); - $result = "<a href=\"$url\""; - if ( isset( $this->md_titles[$link_id] ) ) { - $title = $this->md_titles[$link_id]; - $title = str_replace(array('*', '_'), - array(self::$md_escape_table['*'], - self::$md_escape_table['_']), $title); - $result .= " title=\"$title\""; - } - $result .= ">$link_text</a>"; - } - else { - $result = $whole_match; - } - return $result; - } - private function _DoAnchors_inline_callback($matches) { - $whole_match = $matches[1]; - $link_text = $matches[2]; - $url = $matches[3]; - $title =& $matches[6]; - - # We've got to encode these to avoid conflicting with italics/bold. - $url = str_replace(array('*', '_'), - array(self::$md_escape_table['*'], self::$md_escape_table['_']), - $url); - $result = "<a href=\"$url\""; - if (isset($title)) { - $title = str_replace('"', '"', $title); - $title = str_replace(array('*', '_'), - array(self::$md_escape_table['*'], self::$md_escape_table['_']), - $title); - $result .= " title=\"$title\""; - } - - $result .= ">$link_text</a>"; - - return $result; - } - - - private function _DoImages($text) { - # - # Turn Markdown image shortcuts into <img> tags. - # - # - # First, handle reference-style labeled images: ![alt text][id] - # - $text = preg_replace_callback('{ - ( # wrap whole match in $1 - !\[ - ('.self::$md_nested_brackets.') # alt text = $2 - \] - - [ ]? # one optional space - (?:\n[ ]*)? # one optional newline followed by spaces - - \[ - (.*?) # id = $3 - \] - - ) - }xs', - array($this,'_DoImages_reference_callback'), $text); - - # - # Next, handle inline images:  - # Don't forget: encode * and _ - - $text = preg_replace_callback('{ - ( # wrap whole match in $1 - !\[ - ('.self::$md_nested_brackets.') # alt text = $2 - \] - \( # literal paren - [ \t]* - <?(\S+?)>? # src url = $3 - [ \t]* - ( # $4 - ([\'"]) # quote char = $5 - (.*?) # title = $6 - \5 # matching quote - [ \t]* - )? # title is optional - \) - ) - }xs', - array($this,'_DoImages_inline_callback'), $text); - - return $text; - } - private function _DoImages_reference_callback($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 = str_replace('"', '"', $alt_text); - if (isset($this->md_urls[$link_id])) { - $url = $this->md_urls[$link_id]; - # We've got to encode these to avoid conflicting with italics/bold. - $url = str_replace(array('*', '_'), - array(self::$md_escape_table['*'], self::$md_escape_table['_']), - $url); - $result = "<img src=\"$url\" alt=\"$alt_text\""; - if (isset($this->md_titles[$link_id])) { - $title = $this->md_titles[$link_id]; - $title = str_replace(array('*', '_'), - array(self::$md_escape_table['*'], - self::$md_escape_table['_']), $title); - $result .= " title=\"$title\""; - } - $result .= $this->md_empty_element_suffix; - } - else { - # If there's no such link ID, leave intact: - $result = $whole_match; - } - - return $result; - } - private function _DoImages_inline_callback($matches) { - $whole_match = $matches[1]; - $alt_text = $matches[2]; - $url = $matches[3]; - $title = ''; - if (isset($matches[6])) { - $title = $matches[6]; - } - - $alt_text = str_replace('"', '"', $alt_text); - $title = str_replace('"', '"', $title); - # We've got to encode these to avoid conflicting with italics/bold. - $url = str_replace(array('*', '_'), - array(self::$md_escape_table['*'], self::$md_escape_table['_']), - $url); - $result = "<img src=\"$url\" alt=\"$alt_text\""; - if (isset($title)) { - $title = str_replace(array('*', '_'), - array(self::$md_escape_table['*'], self::$md_escape_table['_']), - $title); - $result .= " title=\"$title\""; # $title already quoted - } - $result .= $this->md_empty_element_suffix; - - return $result; - } - - - private function _DoHeaders($text) { - # Setext-style headers: - # Header 1 - # ======== - # - # Header 2 - # -------- - # - $text = preg_replace( - array('{ ^(.+)[ \t]*\n=+[ \t]*\n+ }emx', - '{ ^(.+)[ \t]*\n-+[ \t]*\n+ }emx'), - array("'<h1>'.\$this->_RunSpanGamut(\$this->_UnslashQuotes('\\1')).'</h1>\n\n'", - "'<h2>'.\$this->_RunSpanGamut(\$this->_UnslashQuotes('\\1')).'</h2>\n\n'"), - $text); - - # atx-style headers: - # # Header 1 - # ## Header 2 - # ## Header 2 with closing hashes ## - # ... - # ###### Header 6 - # - $text = preg_replace("{ - ^(\\#{1,6}) # $1 = string of #'s - [ \\t]* - (.+?) # $2 = Header text - [ \\t]* - \\#* # optional closing #'s (not counted) - \\n+ - }xme", - "'<h'.strlen('\\1').'>'.\$this->_RunSpanGamut(\$this->_UnslashQuotes('\\2')).'</h'.strlen('\\1').'>\n\n'", - $text); - - return $text; - } - - - private function _DoLists($text) { - # - # Form HTML ordered (numbered) and unordered (bulleted) lists. - # - $less_than_tab = $this->md_tab_width - 1; - - # Re-usable patterns to match list item bullets and number markers: - $marker_ul = '[*+-]'; - $marker_ol = '\d+[.]'; - $marker_any = "(?:$marker_ul|$marker_ol)"; - - $markers = array($marker_ul, $marker_ol); - - foreach ($markers as $marker) { - # Re-usable pattern to match any entirel ul or ol list: - $whole_list = ' - ( # $1 = whole list - ( # $2 - [ ]{0,'.$less_than_tab.'} - ('.$marker.') # $3 = first list item marker - [ \t]+ - ) - (?s:.+?) - ( # $4 - \z - | - \n{2,} - (?=\S) - (?! # Negative lookahead for another list item marker - [ \t]* - '.$marker.'[ \t]+ - ) - ) - ) - '; // mx - - # We use a different prefix before nested lists than top-level lists. - # See extended comment in _ProcessListItems(). - - if ($this->md_list_level) { - $text = preg_replace_callback('{ - ^ - '.$whole_list.' - }mx', - array($this,'_DoLists_callback_top'), $text); - } - else { - $text = preg_replace_callback('{ - (?:(?<=\n\n)|\A\n?) - '.$whole_list.' - }mx', - array($this,'_DoLists_callback_nested'), $text); - } - } - - return $text; - } - private function _DoLists_callback_top($matches) { - # Re-usable patterns to match list item bullets and number markers: - $marker_ul = '[*+-]'; - $marker_ol = '\d+[.]'; - $marker_any = "(?:$marker_ul|$marker_ol)"; - - $list = $matches[1]; - $list_type = preg_match("/$marker_ul/", $matches[3]) ? "ul" : "ol"; - - $marker_any = ( $list_type == "ul" ? $marker_ul : $marker_ol ); - - # Turn double returns into triple returns, so that we can make a - # paragraph for the last item in a list, if necessary: - $list = preg_replace("/\n{2,}/", "\n\n\n", $list); - $result = $this->_ProcessListItems($list, $marker_any); - - # Trim any trailing whitespace, to put the closing `</$list_type>` - # up on the preceding line, to get it past the current stupid - # HTML block parser. This is a hack to work around the terrible - # hack that is the HTML block parser. - $result = rtrim($result); - $result = "<$list_type>" . $result . "</$list_type>\n"; - return $result; - } - private function _DoLists_callback_nested($matches) { - # Re-usable patterns to match list item bullets and number markers: - $marker_ul = '[*+-]'; - $marker_ol = '\d+[.]'; - $marker_any = "(?:$marker_ul|$marker_ol)"; - - $list = $matches[1]; - $list_type = preg_match("/$marker_ul/", $matches[3]) ? "ul" : "ol"; - - $marker_any = ( $list_type == "ul" ? $marker_ul : $marker_ol ); - - # Turn double returns into triple returns, so that we can make a - # paragraph for the last item in a list, if necessary: - $list = preg_replace("/\n{2,}/", "\n\n\n", $list); - $result = $this->_ProcessListItems($list, $marker_any); - $result = "<$list_type>\n" . $result . "</$list_type>\n"; - return $result; - } - - - private function _ProcessListItems($list_str, $marker_any) { - # - # Process the contents of a single ordered or unordered list, splitting it - # into individual list items. - # - - # The $md_list_level keeps track of when we're inside a list. - # Each time we enter a list, we increment it; when we leave a list, - # we decrement. If it's zero, we're not in a list anymore. - # - # We do this because when we're not inside a list, we want to treat - # something like this: - # - # I recommend upgrading to version - # 8. Oops, now this line is treated - # as a sub-list. - # - # As a single paragraph, despite the fact that the second line starts - # with a digit-period-space sequence. - # - # Whereas when we're inside a list (or sub-list), that line will be - # treated as the start of a sub-list. What a kludge, huh? This is - # an aspect of Markdown's syntax that's hard to parse perfectly - # without resorting to mind-reading. Perhaps the solution is to - # change the syntax rules such that sub-lists must start with a - # starting cardinal number; e.g. "1." or "a.". - - $this->md_list_level++; - - # trim trailing blank lines: - $list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str); - - $list_str = preg_replace_callback('{ - (\n)? # leading line = $1 - (^[ \t]*) # leading whitespace = $2 - ('.$marker_any.') [ \t]+ # list marker = $3 - ((?s:.+?) # list item text = $4 - (\n{1,2})) - (?= \n* (\z | \2 ('.$marker_any.') [ \t]+)) - }xm', - array($this,'_ProcessListItems_callback'), $list_str); - - $this->md_list_level--; - return $list_str; - } - private function _ProcessListItems_callback($matches) { - $item = $matches[4]; - $leading_line =& $matches[1]; - $leading_space =& $matches[2]; - - if ($leading_line || preg_match('/\n{2,}/', $item)) { - $item = $this->_RunBlockGamut($this->_Outdent($item)); - } - else { - # Recursion for sub-lists: - $item = $this->_DoLists($this->_Outdent($item)); - $item = preg_replace('/\n+$/', '', $item); - $item = $this->_RunSpanGamut($item); - } - - return "<li>" . $item . "</li>\n"; - } - - - private function _DoCodeBlocks($text) { - # - # Process Markdown `<pre><code>` blocks. - # - $text = preg_replace_callback('{ - (?:\n\n|\A) - ( # $1 = the code block -- one or more lines, starting with a space/tab - (?: - (?:[ ]{'.$this->md_tab_width.'} | \t) # Lines must start with a tab or a tab-width of spaces - .*\n+ - )+ - ) - ((?=^[ ]{0,'.$this->md_tab_width.'}\S)|\Z) # Lookahead for non-space at line-start, or end of doc - }xm', - array($this,'_DoCodeBlocks_callback'), $text); - - return $text; - } - private function _DoCodeBlocks_callback($matches) { - $codeblock = $matches[1]; - - $codeblock = $this->_EncodeCode($this->_Outdent($codeblock)); - // $codeblock = _Detab($codeblock); - # trim leading newlines and trailing whitespace - $codeblock = preg_replace(array('/\A\n+/', '/\s+\z/'), '', $codeblock); - - $result = "\n\n<pre><code>" . $codeblock . "\n</code></pre>\n\n"; - - return $result; - } - - - private function _DoCodeSpans($text) { - # - # * Backtick quotes are used for <code></code> spans. - # - # * You can use multiple backticks as the delimiters if you want to - # include literal backticks in the code span. So, this input: - # - # Just type ``foo `bar` baz`` at the prompt. - # - # Will translate to: - # - # <p>Just type <code>foo `bar` baz</code> at the prompt.</p> - # - # There's no arbitrary limit to the number of backticks you - # can use as delimters. If you need three consecutive backticks - # in your code, use four for delimiters, etc. - # - # * You can use spaces to get literal backticks at the edges: - # - # ... type `` `bar` `` ... - # - # Turns to: - # - # ... type <code>`bar`</code> ... - # - $text = preg_replace_callback('@ - (?<!\\\) # Character before opening ` can\'t be a backslash - (`+) # $1 = Opening run of ` - (.+?) # $2 = The code block - (?<!`) - \1 # Matching closer - (?!`) - @xs', - array($this,'_DoCodeSpans_callback'), $text); - - return $text; - } - private function _DoCodeSpans_callback($matches) { - $c = $matches[2]; - $c = preg_replace('/^[ \t]*/', '', $c); # leading whitespace - $c = preg_replace('/[ \t]*$/', '', $c); # trailing whitespace - $c = $this->_EncodeCode($c); - return "<code>$c</code>"; - } - - - private function _EncodeCode($_) { - # - # Encode/escape certain characters inside Markdown code runs. - # The point is that in code, these characters are literals, - # and lose their special Markdown meanings. - # - # Encode all ampersands; HTML entities are not - # entities within a Markdown code span. - $_ = str_replace('&', '&', $_); - - # Do the angle bracket song and dance: - $_ = str_replace(array('<', '>'), - array('<', '>'), $_); - - # Now, escape characters that are magic in Markdown: - $_ = str_replace(array_keys(self::$md_escape_table), - array_values(self::$md_escape_table), $_); - - return $_; - } - - - private function _DoItalicsAndBold($text) { - # <strong> must go first: - $text = preg_replace('{ - ( # $1: Marker - (?<!\*\*) \*\* | # (not preceded by two chars of - (?<!__) __ # the same marker) - ) - (?=\S) # Not followed by whitespace - (?!\1) # or two others marker chars. - ( # $2: Content - (?: - [^*_]+? # Anthing not em markers. - | - # Balence any regular emphasis inside. - ([*_]) (?=\S) .+? (?<=\S) \3 # $3: em char (* or _) - | - (?! \1 ) . # Allow unbalenced * and _. - )+? - ) - (?<=\S) \1 # End mark not preceded by whitespace. - }sx', - '<strong>\2</strong>', $text); - # Then <em>: - $text = preg_replace( - '{ ( (?<!\*)\* | (?<!_)_ ) (?=\S) (?! \1) (.+?) (?<=\S) \1 }sx', - '<em>\2</em>', $text); - - return $text; - } - - - private function _DoBlockQuotes($text) { - $text = preg_replace_callback('/ - ( # Wrap whole match in $1 - ( - ^[ \t]*>[ \t]? # ">" at the start of a line - .+\n # rest of the first line - (.+\n)* # subsequent consecutive lines - \n* # blanks - )+ - ) - /xm', - array($this,'_DoBlockQuotes_callback'), $text); - - return $text; - } - private function _DoBlockQuotes_callback($matches) { - $bq = $matches[1]; - # trim one level of quoting - trim whitespace-only lines - $bq = preg_replace(array('/^[ \t]*>[ \t]?/m', '/^[ \t]+$/m'), '', $bq); - $bq = $this->_RunBlockGamut($bq); # recurse - - $bq = preg_replace('/^/m', " ", $bq); - # These leading spaces screw with <pre> content, so we need to fix that: - $bq = preg_replace_callback('{(\s*<pre>.+?</pre>)}sx', - array($this,'_DoBlockQuotes_callback2'), $bq); - - return "<blockquote>\n$bq\n</blockquote>\n\n"; - } - private function _DoBlockQuotes_callback2($matches) { - $pre = $matches[1]; - $pre = preg_replace('/^ /m', '', $pre); - return $pre; - } - - - private function _FormParagraphs($text) { - # - # Params: - # $text - string to process with html <p> tags - # - # Strip leading and trailing lines: - $text = preg_replace(array('/\A\n+/', '/\n+\z/'), '', $text); - - $grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY); - - # - # Wrap <p> tags. - # - foreach ($grafs as $key => $value) { - if (!isset( $this->md_html_blocks[$value] )) { - $value = $this->_RunSpanGamut($value); - $value = preg_replace('/^([ \t]*)/', '<p>', $value); - $value .= "</p>"; - $grafs[$key] = $value; - } - } - - # - # Unhashify HTML blocks - # - foreach ($grafs as $key => $value) { - if (isset( $this->md_html_blocks[$value] )) { - $grafs[$key] = $this->md_html_blocks[$value]; - } - } - - return implode("\n\n", $grafs); - } - - - private function _EncodeAmpsAndAngles($text) { - # Smart processing for ampersands and angle brackets that need to be encoded. - - # Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin: - # http://bumppo.net/projects/amputator/ - $text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/', - '&', $text);; - - # Encode naked <'s - $text = preg_replace('{<(?![a-z/?\$!])}i', '<', $text); - - return $text; - } - - - private function _EncodeBackslashEscapes($text) { - # - # Parameter: String. - # Returns: The string, with after processing the following backslash - # escape sequences. - # - # Must process escaped backslashes first. - return str_replace(array_keys(self::$md_backslash_escape_table), - array_values(self::$md_backslash_escape_table), $text); - } - - - private function _DoAutoLinks($text) { - $text = preg_replace("!<((https?|ftp):[^'\">\\s]+)>!", - '<a href="\1">\1</a>', $text); - - # Email addresses: <address@domain.foo> - $text = preg_replace('{ - < - (?:mailto:)? - ( - [-.\w]+ - \@ - [-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+ - ) - > - }exi', - "\$this->_EncodeEmailAddress(\$this->_UnescapeSpecialChars(\$this->_UnslashQuotes('\\1')))", - $text); - - return $text; - } - - - private function _EncodeEmailAddress($addr) { - # - # Input: an email address, e.g. "foo@example.com" - # - # Output: the email address as a mailto link, with each character - # of the address encoded as either a decimal or hex entity, in - # the hopes of foiling most address harvesting spam bots. E.g.: - # - # <a href="mailto:foo@e - # xample.com">foo - # @example.com</a> - # - # Based by a filter by Matthew Wickline, posted to the BBEdit-Talk - # mailing list: <http://tinyurl.com/yu7ue> - # - $addr = "mailto:" . $addr; - $length = strlen($addr); - - # leave ':' alone (to spot mailto: later) - $addr = preg_replace_callback('/([^\:])/', - array($this,'_EncodeEmailAddress_callback'), $addr); - - $addr = "<a href=\"$addr\">$addr</a>"; - # strip the mailto: from the visible part - $addr = preg_replace('/">.+?:/', '">', $addr); - - return $addr; - } - private function _EncodeEmailAddress_callback($matches) { - $char = $matches[1]; - $r = rand(0, 100); - # roughly 10% raw, 45% hex, 45% dec - # '@' *must* be encoded. I insist. - if ($r > 90 && $char != '@') return $char; - if ($r < 45) return '&#x'.dechex(ord($char)).';'; - return '&#'.ord($char).';'; - } - - - private function _UnescapeSpecialChars($text) { - # - # Swap back in all the special characters we've hidden. - # - return str_replace(array_values(self::$md_escape_table), - array_keys(self::$md_escape_table), $text); - } - - - # _TokenizeHTML is shared between PHP Markdown and PHP SmartyPants. - # We only define it if it is not already defined. - - private function _TokenizeHTML($str) { - # - # Parameter: String containing HTML markup. - # Returns: An array of the tokens comprising the input - # string. Each token is either a tag (possibly with nested, - # tags contained therein, such as <a href="<MTFoo>">, or a - # run of text between tags. Each element of the array is a - # two-element array; the first is either 'tag' or 'text'; - # the second is the actual value. - # - # - # Regular expression derived from the _tokenize() subroutine in - # Brad Choate's MTRegex plugin. - # <http://www.bradchoate.com/past/mtregex.php> - # - $index = 0; - $tokens = array(); - - $match = '(?s:<!(?:--.*?--\s*)+>)|'. # comment - '(?s:<\?.*?\?>)|'. # processing instruction - # regular tags - '(?:<[/!$]?[-a-zA-Z0-9:]+\b(?>[^"\'>]+|"[^"]*"|\'[^\']*\')*>)'; - - $parts = preg_split("{($match)}", $str, -1, PREG_SPLIT_DELIM_CAPTURE); - - foreach ($parts as $part) { - if (++$index % 2 && $part != '') - $tokens[] = array('text', $part); - else - $tokens[] = array('tag', $part); - } - - return $tokens; - } - - private function _Outdent($text) { - # - # Remove one level of line-leading tabs or spaces - # - return preg_replace("/^(\\t|[ ]{1,".$this->md_tab_width."})/m", "", $text); - } - - - private function _Detab($text) { - # - # Replace tabs with the appropriate amount of space. - # - # For each line we separate the line in blocks delemited by - # tab characters. Then we reconstruct every line by adding the - # appropriate number of space between each blocks. - - $lines = explode("\n", $text); - $text = ""; - - foreach ($lines as $line) { - # Split in blocks. - $blocks = explode("\t", $line); - # Add each blocks to the line. - $line = $blocks[0]; - unset($blocks[0]); # Do not add first block twice. - foreach ($blocks as $block) { - # Calculate amount of space, insert spaces, insert block. - $amount = $this->md_tab_width - strlen($line) % $this->md_tab_width; - $line .= str_repeat(" ", $amount) . $block; - } - $text .= "$line\n"; - } - return $text; - } - - - private function _UnslashQuotes($text) { - # - # This function is useful to remove automaticaly slashed double quotes - # when using preg_replace and evaluating an expression. - # Parameter: String. - # Returns: The string with any slash-double-quote (\") sequence replaced - # by a single double quote. - # - return str_replace('\"', '"', $text); - } -} - -/* - -PHP Markdown -============ - -Description ------------ - -This is a PHP translation of the original Markdown formatter written in -Perl by John Gruber. - -Markdown is a text-to-HTML filter; it translates an easy-to-read / -easy-to-write structured text format into HTML. Markdown's text format -is most similar to that of plain text email, and supports features such -as headers, *emphasis*, code blocks, blockquotes, and links. - -Markdown's syntax is designed not as a generic markup language, but -specifically to serve as a front-end to (X)HTML. You can use span-level -HTML tags anywhere in a Markdown document, and you can use block level -HTML tags (like <div> and <table> as well). - -For more information about Markdown's syntax, see: - -<http://daringfireball.net/projects/markdown/> - - -Bugs ----- - -To file bug reports please send email to: - -<michel.fortin@michelf.com> - -Please include with your report: (1) the example input; (2) the output you -expected; (3) the output Markdown actually produced. - - -Version History ---------------- - -See the readme file for detailed release notes for this version. - -1.0.1c - 9 Dec 2005 - -1.0.1b - 6 Jun 2005 - -1.0.1a - 15 Apr 2005 - -1.0.1 - 16 Dec 2004 - -1.0 - 21 Aug 2004 - - -Author & Contributors ---------------------- - -Original Perl version by John Gruber -<http://daringfireball.net/> - -PHP port and other contributions by Michel Fortin -<http://www.michelf.com/> - - -Copyright and License ---------------------- - -Copyright (c) 2004-2005 Michel Fortin -<http://www.michelf.com/> -All rights reserved. - -Copyright (c) 2003-2004 John Gruber -<http://daringfireball.net/> -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. - -*/ |