diff -r 53cff4b4a802 -r bde1974c263b web/wp-includes/shortcodes.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/wp-includes/shortcodes.php	Wed Feb 03 15:37:20 2010 +0000
@@ -0,0 +1,298 @@
+<?php
+/**
+ * WordPress API for creating bbcode like tags or what WordPress calls
+ * "shortcodes." The tag and attribute parsing or regular expression code is
+ * based on the Textpattern tag parser.
+ *
+ * A few examples are below:
+ *
+ * [shortcode /]
+ * [shortcode foo="bar" baz="bing" /]
+ * [shortcode foo="bar"]content[/shortcode]
+ *
+ * Shortcode tags support attributes and enclosed content, but does not entirely
+ * support inline shortcodes in other shortcodes. You will have to call the
+ * shortcode parser in your function to account for that.
+ *
+ * {@internal
+ * Please be aware that the above note was made during the beta of WordPress 2.6
+ * and in the future may not be accurate. Please update the note when it is no
+ * longer the case.}}
+ *
+ * To apply shortcode tags to content:
+ *
+ * <code>
+ * $out = do_shortcode($content);
+ * </code>
+ *
+ * @link http://codex.wordpress.org/Shortcode_API
+ *
+ * @package WordPress
+ * @subpackage Shortcodes
+ * @since 2.5
+ */
+
+/**
+ * Container for storing shortcode tags and their hook to call for the shortcode
+ *
+ * @since 2.5
+ * @name $shortcode_tags
+ * @var array
+ * @global array $shortcode_tags
+ */
+$shortcode_tags = array();
+
+/**
+ * Add hook for shortcode tag.
+ *
+ * There can only be one hook for each shortcode. Which means that if another
+ * plugin has a similar shortcode, it will override yours or yours will override
+ * theirs depending on which order the plugins are included and/or ran.
+ *
+ * Simplest example of a shortcode tag using the API:
+ *
+ * <code>
+ * // [footag foo="bar"]
+ * function footag_func($atts) {
+ * 	return "foo = {$atts[foo]}";
+ * }
+ * add_shortcode('footag', 'footag_func');
+ * </code>
+ *
+ * Example with nice attribute defaults:
+ *
+ * <code>
+ * // [bartag foo="bar"]
+ * function bartag_func($atts) {
+ * 	extract(shortcode_atts(array(
+ * 		'foo' => 'no foo',
+ * 		'baz' => 'default baz',
+ * 	), $atts));
+ *
+ * 	return "foo = {$foo}";
+ * }
+ * add_shortcode('bartag', 'bartag_func');
+ * </code>
+ *
+ * Example with enclosed content:
+ *
+ * <code>
+ * // [baztag]content[/baztag]
+ * function baztag_func($atts, $content='') {
+ * 	return "content = $content";
+ * }
+ * add_shortcode('baztag', 'baztag_func');
+ * </code>
+ *
+ * @since 2.5
+ * @uses $shortcode_tags
+ *
+ * @param string $tag Shortcode tag to be searched in post content.
+ * @param callable $func Hook to run when shortcode is found.
+ */
+function add_shortcode($tag, $func) {
+	global $shortcode_tags;
+
+	if ( is_callable($func) )
+		$shortcode_tags[$tag] = $func;
+}
+
+/**
+ * Removes hook for shortcode.
+ *
+ * @since 2.5
+ * @uses $shortcode_tags
+ *
+ * @param string $tag shortcode tag to remove hook for.
+ */
+function remove_shortcode($tag) {
+	global $shortcode_tags;
+
+	unset($shortcode_tags[$tag]);
+}
+
+/**
+ * Clear all shortcodes.
+ *
+ * This function is simple, it clears all of the shortcode tags by replacing the
+ * shortcodes global by a empty array. This is actually a very efficient method
+ * for removing all shortcodes.
+ *
+ * @since 2.5
+ * @uses $shortcode_tags
+ */
+function remove_all_shortcodes() {
+	global $shortcode_tags;
+
+	$shortcode_tags = array();
+}
+
+/**
+ * Search content for shortcodes and filter shortcodes through their hooks.
+ *
+ * If there are no shortcode tags defined, then the content will be returned
+ * without any filtering. This might cause issues when plugins are disabled but
+ * the shortcode will still show up in the post or content.
+ *
+ * @since 2.5
+ * @uses $shortcode_tags
+ * @uses get_shortcode_regex() Gets the search pattern for searching shortcodes.
+ *
+ * @param string $content Content to search for shortcodes
+ * @return string Content with shortcodes filtered out.
+ */
+function do_shortcode($content) {
+	global $shortcode_tags;
+
+	if (empty($shortcode_tags) || !is_array($shortcode_tags))
+		return $content;
+
+	$pattern = get_shortcode_regex();
+	return preg_replace_callback('/'.$pattern.'/s', 'do_shortcode_tag', $content);
+}
+
+/**
+ * Retrieve the shortcode regular expression for searching.
+ *
+ * The regular expression combines the shortcode tags in the regular expression
+ * in a regex class.
+ *
+ * The regular expresion contains 6 different sub matches to help with parsing.
+ *
+ * 1/6 - An extra [ or ] to allow for escaping shortcodes with double [[]]
+ * 2 - The shortcode name
+ * 3 - The shortcode argument list
+ * 4 - The self closing /
+ * 5 - The content of a shortcode when it wraps some content.
+ *
+ * @since 2.5
+ * @uses $shortcode_tags
+ *
+ * @return string The shortcode search regular expression
+ */
+function get_shortcode_regex() {
+	global $shortcode_tags;
+	$tagnames = array_keys($shortcode_tags);
+	$tagregexp = join( '|', array_map('preg_quote', $tagnames) );
+
+	// WARNING! Do not change this regex without changing do_shortcode_tag() and strip_shortcodes()
+	return '(.?)\[('.$tagregexp.')\b(.*?)(?:(\/))?\](?:(.+?)\[\/\2\])?(.?)';
+}
+
+/**
+ * Regular Expression callable for do_shortcode() for calling shortcode hook.
+ * @see get_shortcode_regex for details of the match array contents.
+ *
+ * @since 2.5
+ * @access private
+ * @uses $shortcode_tags
+ *
+ * @param array $m Regular expression match array
+ * @return mixed False on failure.
+ */
+function do_shortcode_tag($m) {
+	global $shortcode_tags;
+
+	// allow [[foo]] syntax for escaping a tag
+	if ($m[1] == '[' && $m[6] == ']') {
+		return substr($m[0], 1, -1);
+	}
+
+	$tag = $m[2];
+	$attr = shortcode_parse_atts($m[3]);
+
+	if ( isset($m[5]) ) {
+		// enclosing tag - extra parameter
+		return $m[1] . call_user_func($shortcode_tags[$tag], $attr, $m[5], $m[2]) . $m[6];
+	} else {
+		// self-closing tag
+		return $m[1] . call_user_func($shortcode_tags[$tag], $attr, NULL, $m[2]) . $m[6];
+	}
+}
+
+/**
+ * Retrieve all attributes from the shortcodes tag.
+ *
+ * The attributes list has the attribute name as the key and the value of the
+ * attribute as the value in the key/value pair. This allows for easier
+ * retrieval of the attributes, since all attributes have to be known.
+ *
+ * @since 2.5
+ *
+ * @param string $text
+ * @return array List of attributes and their value.
+ */
+function shortcode_parse_atts($text) {
+	$atts = array();
+	$pattern = '/(\w+)\s*=\s*"([^"]*)"(?:\s|$)|(\w+)\s*=\s*\'([^\']*)\'(?:\s|$)|(\w+)\s*=\s*([^\s\'"]+)(?:\s|$)|"([^"]*)"(?:\s|$)|(\S+)(?:\s|$)/';
+	$text = preg_replace("/[\x{00a0}\x{200b}]+/u", " ", $text);
+	if ( preg_match_all($pattern, $text, $match, PREG_SET_ORDER) ) {
+		foreach ($match as $m) {
+			if (!empty($m[1]))
+				$atts[strtolower($m[1])] = stripcslashes($m[2]);
+			elseif (!empty($m[3]))
+				$atts[strtolower($m[3])] = stripcslashes($m[4]);
+			elseif (!empty($m[5]))
+				$atts[strtolower($m[5])] = stripcslashes($m[6]);
+			elseif (isset($m[7]) and strlen($m[7]))
+				$atts[] = stripcslashes($m[7]);
+			elseif (isset($m[8]))
+				$atts[] = stripcslashes($m[8]);
+		}
+	} else {
+		$atts = ltrim($text);
+	}
+	return $atts;
+}
+
+/**
+ * Combine user attributes with known attributes and fill in defaults when needed.
+ *
+ * The pairs should be considered to be all of the attributes which are
+ * supported by the caller and given as a list. The returned attributes will
+ * only contain the attributes in the $pairs list.
+ *
+ * If the $atts list has unsupported attributes, then they will be ignored and
+ * removed from the final returned list.
+ *
+ * @since 2.5
+ *
+ * @param array $pairs Entire list of supported attributes and their defaults.
+ * @param array $atts User defined attributes in shortcode tag.
+ * @return array Combined and filtered attribute list.
+ */
+function shortcode_atts($pairs, $atts) {
+	$atts = (array)$atts;
+	$out = array();
+	foreach($pairs as $name => $default) {
+		if ( array_key_exists($name, $atts) )
+			$out[$name] = $atts[$name];
+		else
+			$out[$name] = $default;
+	}
+	return $out;
+}
+
+/**
+ * Remove all shortcode tags from the given content.
+ *
+ * @since 2.5
+ * @uses $shortcode_tags
+ *
+ * @param string $content Content to remove shortcode tags.
+ * @return string Content without shortcode tags.
+ */
+function strip_shortcodes( $content ) {
+	global $shortcode_tags;
+
+	if (empty($shortcode_tags) || !is_array($shortcode_tags))
+		return $content;
+
+	$pattern = get_shortcode_regex();
+
+	return preg_replace('/'.$pattern.'/s', '$1$6', $content);
+}
+
+add_filter('the_content', 'do_shortcode', 11); // AFTER wpautop()
+
+?>
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