/addons/Markdown.plugin/php/modifier.markdown.php
PHP | 1391 lines | 822 code | 170 blank | 399 comment | 41 complexity | b7e766175017dafc60cd652941ed0b17 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, LGPL-2.1
- <?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/>
- #
- global $MarkdownPHPVersion, $MarkdownSyntaxVersion,
- $md_empty_element_suffix, $md_tab_width,
- $md_nested_brackets_depth, $md_nested_brackets,
- $md_escape_table, $md_backslash_escape_table,
- $md_list_level;
- $MarkdownPHPVersion = '1.0.1c'; # Fri 9 Dec 2005
- $MarkdownSyntaxVersion = '1.0.1'; # Sun 12 Dec 2004
- #
- # Global default settings:
- #
- $md_empty_element_suffix = " />"; # Change to ">" for HTML output
- $md_tab_width = 4;
- #
- # WordPress settings:
- #
- $md_wp_posts = true; # Set to false to remove Markdown from posts.
- $md_wp_comments = true; # Set to false to remove Markdown from comments.
- # -- WordPress Plugin Interface -----------------------------------------------
- /*
- Plugin Name: Markdown
- Plugin URI: http://www.michelf.com/projects/php-markdown/
- Description: <a href="http://daringfireball.net/projects/markdown/syntax">Markdown syntax</a> allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by <a href="http://daringfireball.net/">John Gruber</a>. <a href="http://www.michelf.com/projects/php-markdown/">More...</a>
- Version: 1.0.1c
- Author: Michel Fortin
- Author URI: http://www.michelf.com/
- */
- if (isset($wp_version)) {
- # More details about how it works here:
- # <http://www.michelf.com/weblog/2005/wordpress-text-flow-vs-markdown/>
-
- # Post content and excerpts
- if ($md_wp_posts) {
- remove_filter('the_content', 'wpautop');
- remove_filter('the_excerpt', 'wpautop');
- add_filter('the_content', 'Markdown', 6);
- add_filter('get_the_excerpt', 'Markdown', 6);
- add_filter('get_the_excerpt', 'trim', 7);
- add_filter('the_excerpt', 'md_add_p');
- add_filter('the_excerpt_rss', 'md_strip_p');
-
- remove_filter('content_save_pre', 'balanceTags', 50);
- remove_filter('excerpt_save_pre', 'balanceTags', 50);
- add_filter('the_content', 'balanceTags', 50);
- add_filter('get_the_excerpt', 'balanceTags', 9);
-
- function md_add_p($text) {
- if (strlen($text) == 0) return;
- if (strcasecmp(substr($text, -3), '<p>') == 0) return $text;
- return '<p>'.$text.'</p>';
- }
- function md_strip_p($t) { return preg_replace('{</?[pP]>}', '', $t); }
- }
-
- # Comments
- if ($md_wp_comments) {
- remove_filter('comment_text', 'wpautop');
- remove_filter('comment_text', 'make_clickable');
- add_filter('pre_comment_content', 'Markdown', 6);
- add_filter('pre_comment_content', 'md_hide_tags', 8);
- add_filter('pre_comment_content', 'md_show_tags', 12);
- add_filter('get_comment_text', 'Markdown', 6);
- add_filter('get_comment_excerpt', 'Markdown', 6);
- add_filter('get_comment_excerpt', 'md_strip_p', 7);
-
- global $md_hidden_tags;
- $md_hidden_tags = array(
- '<p>' => md5('<p>'), '</p>' => md5('</p>'),
- '<pre>' => md5('<pre>'), '</pre>'=> md5('</pre>'),
- '<ol>' => md5('<ol>'), '</ol>' => md5('</ol>'),
- '<ul>' => md5('<ul>'), '</ul>' => md5('</ul>'),
- '<li>' => md5('<li>'), '</li>' => md5('</li>'),
- );
-
- function md_hide_tags($text) {
- global $md_hidden_tags;
- return str_replace(array_keys($md_hidden_tags),
- array_values($md_hidden_tags), $text);
- }
- function md_show_tags($text) {
- global $md_hidden_tags;
- return str_replace(array_values($md_hidden_tags),
- array_keys($md_hidden_tags), $text);
- }
- }
- }
- # -- bBlog Plugin Info --------------------------------------------------------
- function identify_modifier_markdown() {
- global $MarkdownPHPVersion;
- return array(
- 'name' => 'markdown',
- 'type' => 'modifier',
- 'nicename' => 'Markdown',
- 'description' => 'A text-to-HTML conversion tool for web writers',
- 'authors' => 'Michel Fortin and John Gruber',
- 'licence' => 'GPL',
- 'version' => $MarkdownPHPVersion,
- 'help' => '<a href="http://daringfireball.net/projects/markdown/syntax">Markdown syntax</a> allows you to write using an easy-to-read, easy-to-write plain text format. Based on the original Perl version by <a href="http://daringfireball.net/">John Gruber</a>. <a href="http://www.michelf.com/projects/php-markdown/">More...</a>'
- );
- }
- # -- Smarty Modifier Interface ------------------------------------------------
- function smarty_modifier_markdown($text) {
- return Markdown($text);
- }
- # -- Textile Compatibility Mode -----------------------------------------------
- # Rename this file to "classTextile.php" and it can replace Textile anywhere.
- if (strcasecmp(substr(__FILE__, -16), "classTextile.php") == 0) {
- # Try to include PHP SmartyPants. Should be in the same directory.
- @include_once 'smartypants.php';
- # Fake Textile class. It calls Markdown instead.
- class Textile {
- function TextileThis($text, $lite='', $encode='', $noimage='', $strict='') {
- if ($lite == '' && $encode == '') $text = Markdown($text);
- if (function_exists('SmartyPants')) $text = SmartyPants($text);
- return $text;
- }
- }
- }
- #
- # Globals:
- #
- # Regex to match balanced [brackets].
- # Needed to insert a maximum bracked depth while converting to PHP.
- $md_nested_brackets_depth = 6;
- $md_nested_brackets =
- str_repeat('(?>[^\[\]]+|\[', $md_nested_brackets_depth).
- str_repeat('\])*', $md_nested_brackets_depth);
- # Table of hash values for escaped characters:
- $md_escape_table = array(
- "\\" => md5("\\"),
- "`" => md5("`"),
- "*" => md5("*"),
- "_" => md5("_"),
- "{" => md5("{"),
- "}" => md5("}"),
- "[" => md5("["),
- "]" => md5("]"),
- "(" => md5("("),
- ")" => md5(")"),
- ">" => md5(">"),
- "#" => md5("#"),
- "+" => md5("+"),
- "-" => md5("-"),
- "." => md5("."),
- "!" => md5("!")
- );
- # Create an identical table but for escaped characters.
- $md_backslash_escape_table;
- foreach ($md_escape_table as $key => $char)
- $md_backslash_escape_table["\\$key"] = $char;
- function Markdown($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 global 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):
- global $md_urls, $md_titles, $md_html_blocks;
- $md_urls = array();
- $md_titles = array();
- $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.
- $text = _Detab($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
- $text = _HashHTMLBlocks($text);
- # Strip link definitions, store in hashes.
- $text = _StripLinkDefinitions($text);
- $text = _RunBlockGamut($text);
- $text = _UnescapeSpecialChars($text);
- return $text . "\n";
- }
- function _StripLinkDefinitions($text) {
- #
- # Strips link definitions from text, stores the URLs and titles in
- # hash references.
- #
- global $md_tab_width;
- $less_than_tab = $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',
- '_StripLinkDefinitions_callback',
- $text);
- return $text;
- }
- function _StripLinkDefinitions_callback($matches) {
- global $md_urls, $md_titles;
- $link_id = strtolower($matches[1]);
- $md_urls[$link_id] = _EncodeAmpsAndAngles($matches[2]);
- if (isset($matches[3]))
- $md_titles[$link_id] = str_replace('"', '"', $matches[3]);
- return ''; # String that will replace the block
- }
- function _HashHTMLBlocks($text) {
- global $md_tab_width;
- $less_than_tab = $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",
- '_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",
- '_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',
- '_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',
- '_HashHTMLBlocks_callback',
- $text);
- return $text;
- }
- function _HashHTMLBlocks_callback($matches) {
- global $md_html_blocks;
- $text = $matches[1];
- $key = md5($text);
- $md_html_blocks[$key] = $text;
- return "\n\n$key\n\n"; # String that will replace the block
- }
- function _RunBlockGamut($text) {
- #
- # These are all the transformations that form block-level
- # tags like paragraphs, headers, and list items.
- #
- global $md_empty_element_suffix;
- $text = _DoHeaders($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$md_empty_element_suffix\n",
- $text);
- $text = _DoLists($text);
- $text = _DoCodeBlocks($text);
- $text = _DoBlockQuotes($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.
- $text = _HashHTMLBlocks($text);
- $text = _FormParagraphs($text);
- return $text;
- }
- function _RunSpanGamut($text) {
- #
- # These are all the transformations that occur *within* block-level
- # tags like paragraphs, headers, and list items.
- #
- global $md_empty_element_suffix;
- $text = _DoCodeSpans($text);
- $text = _EscapeSpecialChars($text);
- # Process anchor and image tags. Images must come first,
- # because ![foo][f] looks like an anchor.
- $text = _DoImages($text);
- $text = _DoAnchors($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>).
- $text = _DoAutoLinks($text);
- $text = _EncodeAmpsAndAngles($text);
- $text = _DoItalicsAndBold($text);
- # Do hard breaks:
- $text = preg_replace('/ {2,}\n/', "<br$md_empty_element_suffix\n", $text);
- return $text;
- }
- function _EscapeSpecialChars($text) {
- global $md_escape_table;
- $tokens = _TokenizeHTML($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.
- $cur_token[1] = str_replace(array('*', '_'),
- array($md_escape_table['*'], $md_escape_table['_']),
- $cur_token[1]);
- $text .= $cur_token[1];
- } else {
- $t = $cur_token[1];
- $t = _EncodeBackslashEscapes($t);
- $text .= $t;
- }
- }
- return $text;
- }
- function _DoAnchors($text) {
- #
- # Turn Markdown link shortcuts into XHTML <a> tags.
- #
- global $md_nested_brackets;
- #
- # First, handle reference-style links: [link text] [id]
- #
- $text = preg_replace_callback("{
- ( # wrap whole match in $1
- \\[
- ($md_nested_brackets) # link text = $2
- \\]
- [ ]? # one optional space
- (?:\\n[ ]*)? # one optional newline followed by spaces
- \\[
- (.*?) # id = $3
- \\]
- )
- }xs",
- '_DoAnchors_reference_callback', $text);
- #
- # Next, inline-style links: [link text](url "optional title")
- #
- $text = preg_replace_callback("{
- ( # wrap whole match in $1
- \\[
- ($md_nested_brackets) # link text = $2
- \\]
- \\( # literal paren
- [ \\t]*
- <?(.*?)>? # href = $3
- [ \\t]*
- ( # $4
- (['\"]) # quote char = $5
- (.*?) # Title = $6
- \\5 # matching quote
- )? # title is optional
- \\)
- )
- }xs",
- '_DoAnchors_inline_callback', $text);
- return $text;
- }
- function _DoAnchors_reference_callback($matches) {
- global $md_urls, $md_titles, $md_escape_table;
- $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($md_urls[$link_id])) {
- $url = $md_urls[$link_id];
- # We've got to encode these to avoid conflicting with italics/bold.
- $url = str_replace(array('*', '_'),
- array($md_escape_table['*'], $md_escape_table['_']),
- $url);
- $result = "<a href=\"$url\"";
- if ( isset( $md_titles[$link_id] ) ) {
- $title = $md_titles[$link_id];
- $title = str_replace(array('*', '_'),
- array($md_escape_table['*'],
- $md_escape_table['_']), $title);
- $result .= " title=\"$title\"";
- }
- $result .= ">$link_text</a>";
- }
- else {
- $result = $whole_match;
- }
- return $result;
- }
- function _DoAnchors_inline_callback($matches) {
- global $md_escape_table;
- $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.
- $url = str_replace(array('*', '_'),
- array($md_escape_table['*'], $md_escape_table['_']),
- $url);
- $result = "<a href=\"$url\"";
- if (isset($title)) {
- $title = str_replace('"', '"', $title);
- $title = str_replace(array('*', '_'),
- array($md_escape_table['*'], $md_escape_table['_']),
- $title);
- $result .= " title=\"$title\"";
- }
-
- $result .= ">$link_text</a>";
- return $result;
- }
- function _DoImages($text) {
- #
- # Turn Markdown image shortcuts into <img> tags.
- #
- global $md_nested_brackets;
- #
- # First, handle reference-style labeled images: ![alt text][id]
- #
- $text = preg_replace_callback('{
- ( # wrap whole match in $1
- !\[
- ('.$md_nested_brackets.') # alt text = $2
- \]
- [ ]? # one optional space
- (?:\n[ ]*)? # one optional newline followed by spaces
- \[
- (.*?) # id = $3
- \]
- )
- }xs',
- '_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
- !\[
- ('.$md_nested_brackets.') # alt text = $2
- \]
- \( # literal paren
- [ \t]*
- <?(\S+?)>? # src url = $3
- [ \t]*
- ( # $4
- ([\'"]) # quote char = $5
- (.*?) # title = $6
- \5 # matching quote
- [ \t]*
- )? # title is optional
- \)
- )
- }xs',
- '_DoImages_inline_callback', $text);
- return $text;
- }
- function _DoImages_reference_callback($matches) {
- global $md_urls, $md_titles, $md_empty_element_suffix, $md_escape_table;
- $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('"', '"', $alt_text);
- if (isset($md_urls[$link_id])) {
- $url = $md_urls[$link_id];
- # We've got to encode these to avoid conflicting with italics/bold.
- $url = str_replace(array('*', '_'),
- array($md_escape_table['*'], $md_escape_table['_']),
- $url);
- $result = "<img src=\"$url\" alt=\"$alt_text\"";
- if (isset($md_titles[$link_id])) {
- $title = $md_titles[$link_id];
- $title = str_replace(array('*', '_'),
- array($md_escape_table['*'],
- $md_escape_table['_']), $title);
- $result .= " title=\"$title\"";
- }
- $result .= $md_empty_element_suffix;
- }
- else {
- # If there's no such link ID, leave intact:
- $result = $whole_match;
- }
- return $result;
- }
- function _DoImages_inline_callback($matches) {
- global $md_empty_element_suffix, $md_escape_table;
- $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.
- $url = str_replace(array('*', '_'),
- array($md_escape_table['*'], $md_escape_table['_']),
- $url);
- $result = "<img src=\"$url\" alt=\"$alt_text\"";
- if (isset($title)) {
- $title = str_replace(array('*', '_'),
- array($md_escape_table['*'], $md_escape_table['_']),
- $title);
- $result .= " title=\"$title\""; # $title already quoted
- }
- $result .= $md_empty_element_suffix;
- return $result;
- }
- function _DoHeaders($text) {
- # Setext-style headers:
- # Header 1
- # ========
- #
- # Header 2
- # --------
- #
- $text = preg_replace(
- array('{ ^(.+)[ \t]*\n=+[ \t]*\n+ }emx',
- '{ ^(.+)[ \t]*\n-+[ \t]*\n+ }emx'),
- array("'<h1>'._RunSpanGamut(_UnslashQuotes('\\1')).'</h1>\n\n'",
- "'<h2>'._RunSpanGamut(_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').'>'._RunSpanGamut(_UnslashQuotes('\\2')).'</h'.strlen('\\1').'>\n\n'",
- $text);
- return $text;
- }
- function _DoLists($text) {
- #
- # Form HTML ordered (numbered) and unordered (bulleted) lists.
- #
- global $md_tab_width, $md_list_level;
- $less_than_tab = $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 ($md_list_level) {
- $text = preg_replace_callback('{
- ^
- '.$whole_list.'
- }mx',
- '_DoLists_callback_top', $text);
- }
- else {
- $text = preg_replace_callback('{
- (?:(?<=\n\n)|\A\n?)
- '.$whole_list.'
- }mx',
- '_DoLists_callback_nested', $text);
- }
- }
- return $text;
- }
- function _DoLists_callback_top($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);
- $result = _ProcessListItems($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 $result;
- }
- function _DoLists_callback_nested($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);
- $result = _ProcessListItems($list, $marker_any);
- $result = "<$list_type>\n" . $result . "</$list_type>\n";
- return $result;
- }
- function _ProcessListItems($list_str, $marker_any) {
- #
- # Process the contents of a single ordered or unordered list, splitting it
- # into individual list items.
- #
- global $md_list_level;
-
- # The $md_list_level global 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.".
-
- $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',
- '_ProcessListItems_callback', $list_str);
- $md_list_level--;
- return $list_str;
- }
- function _ProcessListItems_callback($matches) {
- $item = $matches[4];
- $leading_line =& $matches[1];
- $leading_space =& $matches[2];
- if ($leading_line || preg_match('/\n{2,}/', $item)) {
- $item = _RunBlockGamut(_Outdent($item));
- }
- else {
- # Recursion for sub-lists:
- $item = _DoLists(_Outdent($item));
- $item = preg_replace('/\n+$/', '', $item);
- $item = _RunSpanGamut($item);
- }
- return "<li>" . $item . "</li>\n";
- }
- function _DoCodeBlocks($text) {
- #
- # Process Markdown `<pre><code>` blocks.
- #
- global $md_tab_width;
- $text = preg_replace_callback('{
- (?:\n\n|\A)
- ( # $1 = the code block -- one or more lines, starting with a space/tab
- (?:
- (?:[ ]{'.$md_tab_width.'} | \t) # Lines must start with a tab or a tab-width of spaces
- .*\n+
- )+
- )
- ((?=^[ ]{0,'.$md_tab_width.'}\S)|\Z) # Lookahead for non-space at line-start, or end of doc
- }xm',
- '_DoCodeBlocks_callback', $text);
- return $text;
- }
- function _DoCodeBlocks_callback($matches) {
- $codeblock = $matches[1];
- $codeblock = _EncodeCode(_Outdent($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 $result;
- }
- function _DoCodeSpans($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',
- '_DoCodeSpans_callback', $text);
- return $text;
- }
- function _DoCodeSpans_callback($matches) {
- $c = $matches[2];
- $c = preg_replace('/^[ \t]*/', '', $c); # leading whitespace
- $c = preg_replace('/[ \t]*$/', '', $c); # trailing whitespace
- $c = _EncodeCode($c);
- return "<code>$c</code>";
- }
- function _EncodeCode($_) {
- #
- # Encode/escape certain characters inside Markdown code runs.
- # The point is that in code, these characters are literals,
- # and lose their special Markdown meanings.
- #
- global $md_escape_table;
- # 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:
- $_ = str_replace(array_keys($md_escape_table),
- array_values($md_escape_table), $_);
- return $_;
- }
- function _DoItalicsAndBold($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 $text;
- }
- function _DoBlockQuotes($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',
- '_DoBlockQuotes_callback', $text);
- return $text;
- }
- function _DoBlockQuotes_callback($matches) {
- $bq = $matches[1];
- # trim one level of quoting - trim whitespace-only lines
- $bq = preg_replace(array('/^[ \t]*>[ \t]?/m', '/^[ \t]+$/m'), '', $bq);
- $bq = _RunBlockGamut($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',
- '_DoBlockQuotes_callback2', $bq);
- return "<blockquote>\n$bq\n</blockquote>\n\n";
- }
- function _DoBlockQuotes_callback2($matches) {
- $pre = $matches[1];
- $pre = preg_replace('/^ /m', '', $pre);
- return $pre;
- }
- function _FormParagraphs($text) {
- #
- # Params:
- # $text - string to process with html <p> tags
- #
- global $md_html_blocks;
- # 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( $md_html_blocks[$value] )) {
- $value = _RunSpanGamut($value);
- $value = preg_replace('/^([ \t]*)/', '<p>', $value);
- $value .= "</p>";
- $grafs[$key] = $value;
- }
- }
- #
- # Unhashify HTML blocks
- #
- foreach ($grafs as $key => $value) {
- if (isset( $md_html_blocks[$value] )) {
- $grafs[$key] = $md_html_blocks[$value];
- }
- }
- return implode("\n\n", $grafs);
- }
- function _EncodeAmpsAndAngles($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 $text;
- }
- function _EncodeBackslashEscapes($text) {
- #
- # Parameter: String.
- # Returns: The string, with after processing the following backslash
- # escape sequences.
- #
- global $md_escape_table, $md_backslash_escape_table;
- # Must process escaped backslashes first.
- return str_replace(array_keys($md_backslash_escape_table),
- array_values($md_backslash_escape_table), $text);
- }
- function _DoAutoLinks($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',
- "_EncodeEmailAddress(_UnescapeSpecialChars(_UnslashQuotes('\\1')))",
- $text);
- return $text;
- }
- function _EncodeEmailAddress($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('/([^\:])/',
- '_EncodeEmailAddress_callback', $addr);
- $addr = "<a href=\"$addr\">$addr</a>";
- # strip the mailto: from the visible part
- $addr = preg_replace('/">.+?:/', '">', $addr);
- return $addr;
- }
- function _EncodeEmailAddress_callback($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).';';
- }
- function _UnescapeSpecialChars($text) {
- #
- # Swap back in all the special characters we've hidden.
- #
- global $md_escape_table;
- return str_replace(array_values($md_escape_table),
- array_keys($md_escape_table), $text);
- }
- # _TokenizeHTML is shared between PHP Markdown and PHP SmartyPants.
- # We only define it if it is not already defined.
- if (!function_exists('_TokenizeHTML')) :
- function _TokenizeHTML($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 $tokens;
- }
- endif;
- function _Outdent($text) {
- #
- # Remove one level of line-leading tabs or spaces
- #
- global $md_tab_width;
- return preg_replace("/^(\\t|[ ]{1,$md_tab_width})/m", "", $text);
- }
- function _Detab($text) {
- #
- # Replace tabs with the appropriate amount of space.
- #
- global $md_tab_width;
- # 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 = $md_tab_width - strlen($line) % $md_tab_width;
- $line .= str_repeat(" ", $amount) . $block;
- }
- $text .= "$line\n";
- }
- return $text;
- }
- function _UnslashQuotes($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.
- */
- ?>