Add and delete WP 2.5 files. *DON'T SVN UPDATE!*

git-svn-id: http://svn.automattic.com/wordpress-mu/trunk@1214 7be80a69-a1ef-0310-a953-fb0f7c49ff36

1 files changed, 133 insertions, 0 deletions

diff --git a/wp-includes/shortcodes.php b/wp-includes/shortcodes.php
new file mode 100644
index 0000000..7e3bf44
--- /dev/null
+++ b/wp-includes/shortcodes.php
@@ -0,0 +1,133 @@
+<?php
+
+/*
+
+An API for creating shortcode tags that support attributes and enclosed content, such as:
+
+[shortcode /]
+[shortcode foo="bar" baz="bing" /]
+[shortcode foo="bar"]content[/shortcode]
+
+tag and attrbute parsing regexp code based on the Textpattern tag parser.
+
+To apply shortcode tags to content:
+
+$out = do_shortcode($content);
+
+Simplest example of a shortcode tag using the API:
+
+// [footag foo="bar"]
+function footag_func($atts) {
+	return "foo = {$atts[foo]}";
+}
+add_shortcode('footag', 'footag_func');
+
+Example with nice attribute defaults:
+
+// [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');
+
+Example with enclosed content:
+
+// [baztag]content[/baztag]
+function baztag_func($atts, $content='') {
+	return "content = $content";
+}
+add_shortcode('baztag', 'baztag_func');
+
+*/
+
+$shortcode_tags = array();
+
+function add_shortcode($tag, $func) {
+	global $shortcode_tags;
+
+	if ( is_callable($func) )
+		$shortcode_tags[$tag] = $func;
+}
+
+function remove_shortcode($tag) {
+	global $shortcode_tags;
+
+	unset($shortcode_tags[$tag]);
+}
+
+function remove_all_shortcodes() {
+	global $shortcode_tags;
+
+	$shortcode_tags = array();
+}
+
+function do_shortcode($content) {
+	global $shortcode_tags;
+
+	if (empty($shortcode_tags) || !is_array($shortcode_tags))
+		return $content;
+
+	$tagnames = array_keys($shortcode_tags);
+	$tagregexp = join( '|', array_map('preg_quote', $tagnames) );
+
+	$pattern = '/\[('.$tagregexp.')\b(.*?)(?:(\/))?\](?:(.+?)\[\/\1\])?/s';
+
+	return preg_replace_callback($pattern, 'do_shortcode_tag', $content);
+}
+
+function do_shortcode_tag($m) {
+	global $shortcode_tags;
+
+	$tag = $m[1];
+	$attr = shortcode_parse_atts($m[2]);
+
+	if ( isset($m[4]) ) {
+		// enclosing tag - extra parameter
+		return call_user_func($shortcode_tags[$tag], $attr, $m[4]);
+	} else {
+		// self-closing tag
+		return call_user_func($shortcode_tags[$tag], $attr);
+	}
+}
+
+function shortcode_parse_atts($text) {
+	$atts = array();
+	$pattern = '/(\w+)\s*=\s*"([^"]*)"(?:\s|$)|(\w+)\s*=\s*\'([^\']*)\'(?:\s|$)|(\w+)\s*=\s*([^\s\'"]+)(?:\s|$)|"([^"]*)"(?:\s|$)|(\S+)(?:\s|$)/';
+	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 $atts;
+}
+
+function shortcode_atts($pairs, $atts) {
+	$out = array();
+	foreach($pairs as $name => $default) {
+		if ( array_key_exists($name, $atts) )
+			$out[$name] = $atts[$name];
+		else
+			$out[$name] = $default;
+	}
+	return $out;
+}
+
+add_filter('the_content', 'do_shortcode');
+
+?>