789 lines
19 KiB
PHP
789 lines
19 KiB
PHP
|
<?php
|
||
|
|
/*
|
||
|
|
Plugin Name: MarkDown
|
||
|
|
Plugin URI: http://daringfireball.net/projects/markdown/
|
||
|
|
Description: Markdown is a text-to-HTML conversion tool for web writers. <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, then convert it to structurally valid XHTML. This plugin <strong>enables Markdown for your posts and comments</strong>. Written by <a href="http://daringfireball.net/">John Gruber</a> in Perl, translated to PHP by <a href="http://www.michelf.com/">Michel Fortin</a>, and made a WP plugin by <a href="http://photomatt.net/">Matt</a>.
|
||
|
|
Author: John Gruber
|
||
|
|
Author URI: http://daringfireball.net/
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
Note to code readers: I've stripped most of the comments from the source, see the original at http://www.michelf.com/php-markdown/?code to get the unaltered version. --Matt
|
||
|
|
*/
|
||
|
|
|
||
|
|
$MarkdownPHPVersion = '1.0b4.1'; # Sun 4 Apr 2004
|
||
|
|
$MarkdownSyntaxVersion = '1.0b4'; # Thu 25 Mar 2004
|
||
|
|
$g_empty_element_suffix = " />"; # Change to ">" for HTML output
|
||
|
|
$g_tab_width = 4;
|
||
|
|
$g_nested_brackets_depth = 6;
|
||
|
|
$g_nested_brackets =
|
||
|
|
str_repeat('(?>[^\[\]]+|\[', $g_nested_brackets_depth).
|
||
|
|
str_repeat('\])*', $g_nested_brackets_depth);
|
||
|
|
$g_escape_table = array(
|
||
|
|
"\\" => md5("\\"),
|
||
|
|
"`" => md5("`"),
|
||
|
|
"*" => md5("*"),
|
||
|
|
"_" => md5("_"),
|
||
|
|
"{" => md5("{"),
|
||
|
|
"}" => md5("}"),
|
||
|
|
"[" => md5("["),
|
||
|
|
"]" => md5("]"),
|
||
|
|
"(" => md5("("),
|
||
|
|
")" => md5(")"),
|
||
|
|
"#" => md5("#"),
|
||
|
|
"." => md5("."),
|
||
|
|
"!" => md5("!")
|
||
|
|
);
|
||
|
|
$g_backslash_escape_table;
|
||
|
|
foreach ($g_escape_table as $key => $char)
|
||
|
|
$g_backslash_escape_table["\\$key"] = $char;
|
||
|
|
|
||
|
|
$g_urls;
|
||
|
|
$g_titles;
|
||
|
|
$g_html_blocks;
|
||
|
|
|
||
|
|
function Markdown($text) {
|
||
|
|
global $g_urls, $g_titles, $g_html_blocks;
|
||
|
|
$g_urls = array();
|
||
|
|
$g_titles = array();
|
||
|
|
$g_html_blocks = array();
|
||
|
|
$text = str_replace(array("\r\n", "\r"), "\n", $text);
|
||
|
|
$text .= "\n\n";
|
||
|
|
$text = _Detab($text);
|
||
|
|
$text = preg_replace('/^[ \t]+$/m', '', $text);
|
||
|
|
$text = _HashHTMLBlocks($text);
|
||
|
|
$text = _StripLinkDefinitions($text);
|
||
|
|
$text = _EscapeSpecialChars($text);
|
||
|
|
$text = _RunBlockGamut($text);
|
||
|
|
$text = _UnescapeSpecialChars($text);
|
||
|
|
return $text . "\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
function _StripLinkDefinitions($text) {
|
||
|
|
$text = preg_replace_callback('{
|
||
|
|
^[ \t]*\[(.+)\]: # id = $1
|
||
|
|
[ \t]*
|
||
|
|
\n? # maybe *one* newline
|
||
|
|
[ \t]*
|
||
|
|
(\S+) # url = $2
|
||
|
|
[ \t]*
|
||
|
|
\n? # maybe one newline
|
||
|
|
[ \t]*
|
||
|
|
(?:
|
||
|
|
# Todo: Titles are delimited by "quotes" or (parens).
|
||
|
|
["(]
|
||
|
|
(.+?) # title = $3
|
||
|
|
[")]
|
||
|
|
[ \t]*
|
||
|
|
)? # title is optional
|
||
|
|
(?:\n+|\Z)
|
||
|
|
}xm',
|
||
|
|
'_StripLinkDefinitions_callback',
|
||
|
|
$text);
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
function _StripLinkDefinitions_callback($matches) {
|
||
|
|
global $g_urls, $g_titles;
|
||
|
|
$link_id = strtolower($matches[1]);
|
||
|
|
$g_urls[$link_id] = _EncodeAmpsAndAngles($matches[2]);
|
||
|
|
if (isset($matches[3]))
|
||
|
|
$g_titles[$link_id] = htmlentities($matches[3]);
|
||
|
|
return ''; # String that will replace the block
|
||
|
|
}
|
||
|
|
|
||
|
|
function _HashHTMLBlocks($text) {
|
||
|
|
$block_tag_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script';
|
||
|
|
$text = preg_replace_callback("{
|
||
|
|
( # save in $1
|
||
|
|
^ # start of line (with /m)
|
||
|
|
<($block_tag_re) # 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);
|
||
|
|
|
||
|
|
$text = preg_replace_callback("{
|
||
|
|
( # save in $1
|
||
|
|
^ # start of line (with /m)
|
||
|
|
<($block_tag_re) # 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);
|
||
|
|
|
||
|
|
$text = preg_replace_callback('{
|
||
|
|
(?:
|
||
|
|
(?<=\n\n) # Starting after a blank line
|
||
|
|
| # or
|
||
|
|
\A\n? # the beginning of the doc
|
||
|
|
)
|
||
|
|
( # save in $1
|
||
|
|
[ \t]*
|
||
|
|
<(hr) # start tag = $2
|
||
|
|
\b # word break
|
||
|
|
([^<>])*? #
|
||
|
|
/?> # the matching end tag
|
||
|
|
(?=\n{2,}|\Z) # followed by a blank line or end of document
|
||
|
|
)
|
||
|
|
}x',
|
||
|
|
'_HashHTMLBlocks_callback',
|
||
|
|
$text);
|
||
|
|
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
function _HashHTMLBlocks_callback($matches) {
|
||
|
|
global $g_html_blocks;
|
||
|
|
$text = $matches[1];
|
||
|
|
$key = md5($text);
|
||
|
|
$g_html_blocks[$key] = $text;
|
||
|
|
return "\n\n$key\n\n"; # String that will replace the block
|
||
|
|
}
|
||
|
|
|
||
|
|
function _RunBlockGamut($text) {
|
||
|
|
global $g_empty_element_suffix;
|
||
|
|
|
||
|
|
$text = _DoHeaders($text);
|
||
|
|
|
||
|
|
$text = preg_replace(
|
||
|
|
array('/^( ?\* ?){3,}$/m',
|
||
|
|
'/^( ?- ?){3,}$/m'),
|
||
|
|
array("\n<hr$g_empty_element_suffix\n",
|
||
|
|
"\n<hr$g_empty_element_suffix\n"),
|
||
|
|
$text);
|
||
|
|
|
||
|
|
$text = _DoLists($text);
|
||
|
|
|
||
|
|
$text = _DoCodeBlocks($text);
|
||
|
|
|
||
|
|
$text = _DoBlockQuotes($text);
|
||
|
|
|
||
|
|
$text = _DoAutoLinks($text);
|
||
|
|
|
||
|
|
$text = _HashHTMLBlocks($text);
|
||
|
|
|
||
|
|
$text = _FormParagraphs($text);
|
||
|
|
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _RunSpanGamut($text) {
|
||
|
|
global $g_empty_element_suffix;
|
||
|
|
$text = _DoCodeSpans($text);
|
||
|
|
|
||
|
|
|
||
|
|
$text = _EncodeAmpsAndAngles($text);
|
||
|
|
|
||
|
|
$text = _DoImages($text);
|
||
|
|
$text = _DoAnchors($text);
|
||
|
|
|
||
|
|
|
||
|
|
$text = _DoItalicsAndBold($text);
|
||
|
|
|
||
|
|
# Do hard breaks:
|
||
|
|
$text = preg_replace('/ {2,}\n/', "<br$g_empty_element_suffix\n", $text);
|
||
|
|
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _EscapeSpecialChars($text) {
|
||
|
|
global $g_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.
|
||
|
|
$tags_to_skip = "!<(/?)(?:pre|code|kbd|script)[\s>]!";
|
||
|
|
|
||
|
|
foreach ($tokens as $cur_token) {
|
||
|
|
if ($cur_token[0] == 'tag') {
|
||
|
|
$cur_token[1] = str_replace(array('*', '_'),
|
||
|
|
array($g_escape_table['*'], $g_escape_table['_']),
|
||
|
|
$cur_token[1]);
|
||
|
|
$text .= $cur_token[1];
|
||
|
|
} else {
|
||
|
|
$t = $cur_token[1];
|
||
|
|
if (! $in_pre) {
|
||
|
|
$t = _EncodeBackslashEscapes($t);
|
||
|
|
# $t =~ s{([a-z])/([a-z])}{$1 / $2}ig;
|
||
|
|
}
|
||
|
|
$text .= $t;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _DoAnchors($text) {
|
||
|
|
global $g_nested_brackets;
|
||
|
|
|
||
|
|
$text = preg_replace_callback("{
|
||
|
|
( # wrap whole match in $1
|
||
|
|
\\[
|
||
|
|
($g_nested_brackets) # link text = $2
|
||
|
|
\\]
|
||
|
|
|
||
|
|
[ ]? # one optional space
|
||
|
|
(?:\\n[ ]*)? # one optional newline followed by spaces
|
||
|
|
|
||
|
|
\\[
|
||
|
|
(.*?) # id = $3
|
||
|
|
\\]
|
||
|
|
)
|
||
|
|
}xs",
|
||
|
|
'_DoAnchors_reference_callback', $text);
|
||
|
|
|
||
|
|
$text = preg_replace_callback("{
|
||
|
|
( # wrap whole match in $1
|
||
|
|
\\[
|
||
|
|
($g_nested_brackets) # link text = $2
|
||
|
|
\\]
|
||
|
|
\\( # literal paren
|
||
|
|
[ \\t]*
|
||
|
|
(.+?) # href = $3
|
||
|
|
[ \\t]*
|
||
|
|
( # title = $4
|
||
|
|
(['\"]) # quote char = $5
|
||
|
|
.*?
|
||
|
|
\\5 # matching quote
|
||
|
|
)? # title is optional
|
||
|
|
\\)
|
||
|
|
)
|
||
|
|
}xs",
|
||
|
|
'_DoAnchors_inline_callback', $text);
|
||
|
|
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
function _DoAnchors_reference_callback($matches) {
|
||
|
|
global $g_urls, $g_titles;
|
||
|
|
$result;
|
||
|
|
$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($g_urls[$link_id])) {
|
||
|
|
$url = $g_urls[$link_id];
|
||
|
|
$url = str_replace(array('*', '_'),
|
||
|
|
array('*', '_'), $url);
|
||
|
|
$result = "<a href='$url'";
|
||
|
|
if ( isset( $g_title[$link_id] ) ) {
|
||
|
|
$title = $g_titles[$link_id];
|
||
|
|
$title = str_replace(array('*', '_'),
|
||
|
|
array('*', '_'), $title);
|
||
|
|
$result .= " title=\"$title\"";
|
||
|
|
}
|
||
|
|
$result .= ">$link_text</a>";
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
$result = $whole_match;
|
||
|
|
}
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
function _DoAnchors_inline_callback($matches) {
|
||
|
|
$result;
|
||
|
|
$whole_match = $matches[1];
|
||
|
|
$link_text = $matches[2];
|
||
|
|
$url = $matches[3];
|
||
|
|
$title = $matches[4];
|
||
|
|
|
||
|
|
# We've got to encode these to avoid conflicting with italics/bold.
|
||
|
|
$url = str_replace(array('*', '_'),
|
||
|
|
array('*', '_'), $url);
|
||
|
|
$result = "<a href=\"$url\"";
|
||
|
|
if ($title) {
|
||
|
|
$title = str_replace(array('*', '_'),
|
||
|
|
array('*', '_'), $title);
|
||
|
|
$result .= " title=$title";
|
||
|
|
}
|
||
|
|
$result .= ">$link_text</a>";
|
||
|
|
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _DoImages($text) {
|
||
|
|
$text = preg_replace_callback('{
|
||
|
|
( # wrap whole match in $1
|
||
|
|
!\[
|
||
|
|
(.*?) # alt text = $2
|
||
|
|
\]
|
||
|
|
|
||
|
|
[ ]? # one optional space
|
||
|
|
(?:\n[ ]*)? # one optional newline followed by spaces
|
||
|
|
|
||
|
|
\[
|
||
|
|
(.*?) # id = $3
|
||
|
|
\]
|
||
|
|
|
||
|
|
)
|
||
|
|
}xs',
|
||
|
|
'_DoImages_reference_callback', $text);
|
||
|
|
|
||
|
|
#
|
||
|
|
# Next, handle inline images: 
|
||
|
|
# Don't forget: encode * and _
|
||
|
|
|
||
|
|
$text = preg_replace_callback("{
|
||
|
|
( # wrap whole match in $1
|
||
|
|
!\\[
|
||
|
|
(.*?) # alt text = $2
|
||
|
|
\\]
|
||
|
|
\\( # literal paren
|
||
|
|
[ \\t]*
|
||
|
|
(\\S+) # src url = $3
|
||
|
|
[ \\t]*
|
||
|
|
( # title = $4
|
||
|
|
(['\"]) # quote char = $5
|
||
|
|
.*?
|
||
|
|
\\5 # matching quote
|
||
|
|
[ \\t]*
|
||
|
|
)? # title is optional
|
||
|
|
\\)
|
||
|
|
)
|
||
|
|
}xs",
|
||
|
|
'_DoImages_inline_callback', $text);
|
||
|
|
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
function _DoImages_reference_callback($matches) {
|
||
|
|
global $g_urls, $g_titles, $g_empty_element_suffix;
|
||
|
|
$result;
|
||
|
|
$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][].
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isset($g_urls[$link_id])) {
|
||
|
|
$url = $g_urls[$link_id];
|
||
|
|
$url = str_replace(array('*', '_'),
|
||
|
|
array('*', '_'), $url);
|
||
|
|
$result = "<img src=\"$url\" alt=\"$alt_text\"";
|
||
|
|
if (isset($g_titles[$link_id])) {
|
||
|
|
$title = $g_titles[$link_id];
|
||
|
|
$title = str_replace(array('*', '_'),
|
||
|
|
array('*', '_'), $title);
|
||
|
|
$result .= " title=\"$title\"";
|
||
|
|
}
|
||
|
|
$result .= $g_empty_element_suffix;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
$result = $whole_match;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
function _DoImages_inline_callback($matches) {
|
||
|
|
global $g_empty_element_suffix;
|
||
|
|
$result;
|
||
|
|
$whole_match = $matches[1];
|
||
|
|
$alt_text = $matches[2];
|
||
|
|
$url = $matches[3];
|
||
|
|
$title = $matches[4];
|
||
|
|
|
||
|
|
$url = str_replace(array('*', '_'),
|
||
|
|
array('*', '_'), $url);
|
||
|
|
$result = "<img src=\"$url\" alt=\"$alt_text\"";
|
||
|
|
if (isset($title)) {
|
||
|
|
$title = str_replace(array('*', '_'),
|
||
|
|
array('*', '_'), $title);
|
||
|
|
$result .= " title=$title"; # $title already quoted
|
||
|
|
}
|
||
|
|
$result .= $g_empty_element_suffix;
|
||
|
|
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _DoHeaders($text) {
|
||
|
|
$text = preg_replace(
|
||
|
|
array("/(.+)[ \t]*\n=+[ \t]*\n+/e",
|
||
|
|
"/(.+)[ \t]*\n-+[ \t]*\n+/e"),
|
||
|
|
array("'<h1>'._RunSpanGamut(_UnslashQuotes('\\1')).'</h1>\n\n'",
|
||
|
|
"'<h2>'._RunSpanGamut(_UnslashQuotes('\\1')).'</h2>\n\n'"),
|
||
|
|
$text);
|
||
|
|
|
||
|
|
$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) {
|
||
|
|
global $g_tab_width;
|
||
|
|
$less_than_tab = $g_tab_width - 1;
|
||
|
|
|
||
|
|
$text = preg_replace_callback("{
|
||
|
|
(
|
||
|
|
(
|
||
|
|
^[ ]{0,$less_than_tab}
|
||
|
|
(\\*|\\d+[.])
|
||
|
|
[ \\t]+
|
||
|
|
)
|
||
|
|
(?s:.+?)
|
||
|
|
(
|
||
|
|
\\z
|
||
|
|
|
|
||
|
|
\\n{2,}
|
||
|
|
(?=\\S)
|
||
|
|
(?![ \\t]* (\\*|\\d+[.]) [ \\t]+)
|
||
|
|
)
|
||
|
|
)
|
||
|
|
}xm",
|
||
|
|
'_DoLists_callback', $text);
|
||
|
|
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
function _DoLists_callback($matches) {
|
||
|
|
$list_type = ($matches[3] == "*") ? "ul" : "ol";
|
||
|
|
$list = $matches[1];
|
||
|
|
$list = preg_replace("/\n{2,}/", "\n\n\n", $list);
|
||
|
|
$result = _ProcessListItems($list);
|
||
|
|
$result = "<$list_type>\n" . $result . "</$list_type>\n";
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _ProcessListItems($list_str) {
|
||
|
|
# 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
|
||
|
|
(\*|\d+[.]) [ \t]+ # list marker = $3
|
||
|
|
((?s:.+?) # list item text = $4
|
||
|
|
(\n{1,2}))
|
||
|
|
(?= \n* (\z | \2 (\*|\d+[.]) [ \t]+))
|
||
|
|
}xm',
|
||
|
|
'_ProcessListItems_callback', $list_str);
|
||
|
|
|
||
|
|
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));
|
||
|
|
#$item =~ s/\n+/\n/g;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
# Recursion for sub-lists:
|
||
|
|
$item = _DoLists(_Outdent($item));
|
||
|
|
$item = rtrim($item, "\n");
|
||
|
|
$item = _RunSpanGamut($item);
|
||
|
|
}
|
||
|
|
|
||
|
|
return "<li>" . $item . "</li>\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _DoCodeBlocks($text) {
|
||
|
|
global $g_tab_width;
|
||
|
|
$text = preg_replace_callback("{
|
||
|
|
(.?) # $1 = preceding character
|
||
|
|
(:) # $2 = colon delimiter
|
||
|
|
(\\n+) # $3 = newlines after colon
|
||
|
|
( # $4 = the code block -- one or more lines, starting with a space/tab
|
||
|
|
(?:
|
||
|
|
(?:[ ]\{$g_tab_width} | \\t) # Lines must start with a tab or a tab-width of spaces
|
||
|
|
.*\\n+
|
||
|
|
)+
|
||
|
|
)
|
||
|
|
((?=^[ ]{0,$g_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) {
|
||
|
|
$prevchar = $matches[1];
|
||
|
|
$newlines = $matches[2];
|
||
|
|
$codeblock = $matches[4];
|
||
|
|
|
||
|
|
$result; # return value
|
||
|
|
|
||
|
|
|
||
|
|
$prefix = "";
|
||
|
|
if (!(preg_match('/\s/', $prevchar) || ($prevchar == ""))) {
|
||
|
|
$prefix = "$prevchar:";
|
||
|
|
}
|
||
|
|
$codeblock = _EncodeCode(_Outdent($codeblock));
|
||
|
|
$codeblock = _Detab($codeblock);
|
||
|
|
# trim leading newlines and trailing whitespace
|
||
|
|
$codeblock = preg_replace(array('/\A\n+/', '/\s+\z/'), '', $codeblock);
|
||
|
|
|
||
|
|
$result = $prefix . "\n\n<pre><code>" . $codeblock . "\n</code></pre>\n\n";
|
||
|
|
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _DoCodeSpans($text) {
|
||
|
|
$text = preg_replace_callback("@
|
||
|
|
(`+) # Opening run of `
|
||
|
|
(.+?) # the code block
|
||
|
|
(?<!`)
|
||
|
|
\\1
|
||
|
|
(?!`)
|
||
|
|
@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>$c</code>";
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _EncodeCode($_) {
|
||
|
|
|
||
|
|
global $g_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:
|
||
|
|
$_ = str_replace(array_keys($g_escape_table),
|
||
|
|
array_values($g_escape_table), $_);
|
||
|
|
|
||
|
|
return $_;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _DoItalicsAndBold($text) {
|
||
|
|
# <strong> must go first:
|
||
|
|
$text = preg_replace('{ (\*\*|__) (?=\S) (.+?) (?<=\S) \1 }sx',
|
||
|
|
'<strong>\2</strong>', $text);
|
||
|
|
# Then <em>:
|
||
|
|
$text = preg_replace('{ (\*|_) (?=\S) (.+?) (?<=\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];
|
||
|
|
$bq = preg_replace('/^[ \t]*>[ \t]?/m', '', $bq);
|
||
|
|
$bq = _RunBlockGamut($bq); # recurse
|
||
|
|
$bq = preg_replace('/^/m', "\t", $bq);
|
||
|
|
|
||
|
|
return "<blockquote>\n$bq\n</blockquote>\n\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _FormParagraphs($text) {
|
||
|
|
global $g_html_blocks;
|
||
|
|
|
||
|
|
# Strip leading and trailing lines:
|
||
|
|
$text = preg_replace(array('/\A\n+/', '/\n+\z/'), '', $text);
|
||
|
|
|
||
|
|
$grafs = preg_split('/\n{2,}/', $text);
|
||
|
|
$count = count($graph);
|
||
|
|
|
||
|
|
|
||
|
|
foreach ($grafs as $key => $value) {
|
||
|
|
if (!isset( $g_html_blocks[$value] )) {
|
||
|
|
$value = _RunSpanGamut($value);
|
||
|
|
$value = preg_replace('/^([ \t]*)/', '<p>', $value);
|
||
|
|
$value .= "</p>";
|
||
|
|
$grafs[$key] = $value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
foreach ($grafs as $key => $value) {
|
||
|
|
if (isset( $g_html_blocks[$value] )) {
|
||
|
|
$grafs[$key] = $g_html_blocks[$value];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return implode("\n\n", $grafs);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _EncodeAmpsAndAngles($text) {
|
||
|
|
$text = preg_replace('/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w{1,8});)/',
|
||
|
|
'&', $text);;
|
||
|
|
|
||
|
|
# Encode naked <'s
|
||
|
|
$text = preg_replace('{<(?![a-z/?\$!])}i', '<', $text);
|
||
|
|
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _EncodeBackslashEscapes($text) {
|
||
|
|
global $g_escape_table, $g_backslash_escape_table;
|
||
|
|
# Must process escaped backslashes first.
|
||
|
|
return str_replace(array_keys($g_backslash_escape_table),
|
||
|
|
array_values($g_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('{
|
||
|
|
<
|
||
|
|
(
|
||
|
|
[-.\w]+
|
||
|
|
\@
|
||
|
|
[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
|
||
|
|
)
|
||
|
|
>
|
||
|
|
}exi',
|
||
|
|
"_EncodeEmailAddress(_UnescapeSpecialChars(_UnslashQuotes('\\1')))",
|
||
|
|
$text);
|
||
|
|
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _EncodeEmailAddress($addr) {
|
||
|
|
$addr = "mailto:" . $addr;
|
||
|
|
$length = strlen($addr);
|
||
|
|
|
||
|
|
$addr = preg_replace_callback('/([^\:])/',
|
||
|
|
'_EncodeEmailAddress_callback', $addr);
|
||
|
|
|
||
|
|
$addr = "<a href=\"$addr\">$addr</a>";
|
||
|
|
$addr = preg_replace('/">.+?:/', '">', $addr);
|
||
|
|
|
||
|
|
return $addr;
|
||
|
|
}
|
||
|
|
function _EncodeEmailAddress_callback($matches) {
|
||
|
|
$char = $matches[1];
|
||
|
|
$r = rand(0, 100);
|
||
|
|
if ($r > 90 && $char != '@') return $char;
|
||
|
|
if ($r < 45) return '&#x'.dechex(ord($char)).';';
|
||
|
|
return '&#'.ord($char).';';
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _UnescapeSpecialChars($text) {
|
||
|
|
global $g_escape_table;
|
||
|
|
return str_replace(array_values($g_escape_table),
|
||
|
|
array_keys($g_escape_table), $text);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _TokenizeHTML($str) {
|
||
|
|
$pos = 0;
|
||
|
|
$len = strlen($str);
|
||
|
|
$tokens = array();
|
||
|
|
|
||
|
|
$depth = 6;
|
||
|
|
$nested_tags = str_repeat('(?:<[a-z\/!$](?:[^<>]|',$depth)
|
||
|
|
.str_repeat(')*>)', $depth);
|
||
|
|
$match = "(?s:<!(--.*?--\s*)+>)|". # comment
|
||
|
|
"(?s:<\?.*?\?>)|". # processing instruction
|
||
|
|
"$nested_tags"; # nested tags
|
||
|
|
|
||
|
|
preg_match_all("/($match)/", $str, $matches,
|
||
|
|
PREG_SET_ORDER | PREG_OFFSET_CAPTURE);
|
||
|
|
|
||
|
|
foreach ($matches as $element) {
|
||
|
|
$whole_tag = $element[0][0];
|
||
|
|
$tag_start = $element[0][1];
|
||
|
|
$sec_start = $tag_start + strlen($whole_tag);
|
||
|
|
if ($pos < $tag_start) {
|
||
|
|
array_push($tokens, array('text',
|
||
|
|
substr($str, $pos, $tag_start - $pos)));
|
||
|
|
}
|
||
|
|
array_push($tokens, array('tag', $whole_tag));
|
||
|
|
$pos = $sec_start;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($pos < $len)
|
||
|
|
array_push($tokens, array('text',
|
||
|
|
substr($str, $pos, $len - $pos)));
|
||
|
|
return $tokens;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _Outdent($text) {
|
||
|
|
global $g_tab_width;
|
||
|
|
return preg_replace("/^(\\t|[ ]{1,$g_tab_width})/m", "", $text);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _Detab($text) {
|
||
|
|
global $g_tab_width;
|
||
|
|
$text = preg_replace(
|
||
|
|
"/(.*?)\t/e",
|
||
|
|
"'\\1'.str_repeat(' ', $g_tab_width - strlen('\\1') % $g_tab_width)",
|
||
|
|
$text);
|
||
|
|
return $text;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
function _UnslashQuotes($text) {
|
||
|
|
return str_replace('\"', '"', $text);
|
||
|
|
}
|
||
|
|
|
||
|
|
// And now for the filters
|
||
|
|
remove_filter('the_content', 'wpautop');
|
||
|
|
remove_filter('the_excerpt', 'wpautop');
|
||
|
|
remove_filter('comment_text', 'wpautop');
|
||
|
|
|
||
|
|
add_filter('the_content', 'Markdown');
|
||
|
|
add_filter('the_excerpt', 'Markdown');
|
||
|
|
remove_filter('comment_text', 'Markdown');
|
||
|
|
|
||
|
|
?>
|