From 2b6348978ec434e2fa4114085783cf9ada097b22 Mon Sep 17 00:00:00 2001
From: donncha <donncha@7be80a69-a1ef-0310-a953-fb0f7c49ff36>
Date: Thu, 3 Jul 2008 17:00:59 +0000
Subject: WP Merge to rev 8249

git-svn-id: http://svn.automattic.com/wordpress-mu/trunk@1347 7be80a69-a1ef-0310-a953-fb0f7c49ff36
---
 wp-includes/feed.php | 275 ++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 264 insertions(+), 11 deletions(-)

(limited to 'wp-includes/feed.php')

diff --git a/wp-includes/feed.php b/wp-includes/feed.php
index 4cf5e67..3ff5b9a 100644
--- a/wp-includes/feed.php
+++ b/wp-includes/feed.php
@@ -1,18 +1,83 @@
 <?php
+/**
+ * WordPress Feed API
+ *
+ * Many of the functions used in here belong in The Loop, or The Loop for the
+ * Feeds.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ */
 
+/**
+ * RSS container for the bloginfo function.
+ *
+ * You can retrieve anything that you can using the get_bloginfo() function.
+ * Everything will be stripped of tags and characters converted, when the values
+ * are retrieved for use in the feeds.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 1.5.1
+ * @uses apply_filters() Calls 'get_bloginfo_rss' hook with two parameters.
+ * @see get_bloginfo() For the list of possible values to display.
+ *
+ * @param string $show See get_bloginfo() for possible values.
+ * @return string
+ */
 function get_bloginfo_rss($show = '') {
 	$info = strip_tags(get_bloginfo($show));
 	return apply_filters('get_bloginfo_rss', convert_chars($info), $show);
 }
 
+/**
+ * Display RSS container for the bloginfo function.
+ *
+ * You can retrieve anything that you can using the get_bloginfo() function.
+ * Everything will be stripped of tags and characters converted, when the values
+ * are retrieved for use in the feeds.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 0.71
+ * @uses apply_filters() Calls 'bloginfo_rss' hook with two parameters.
+ * @see get_bloginfo() For the list of possible values to display.
+ *
+ * @param string $show See get_bloginfo() for possible values.
+ */
 function bloginfo_rss($show = '') {
 	echo apply_filters('bloginfo_rss', get_bloginfo_rss($show), $show);
 }
 
+/**
+ * Retrieve the default feed.
+ *
+ * The default feed is 'rss2', unless a plugin changes it through the
+ * 'default_feed' filter.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 2.5
+ * @uses apply_filters() Calls 'default_feed' hook on the default feed string.
+ *
+ * @return string Default feed, or for example 'rss2', 'atom', etc.
+ */
 function get_default_feed() {
 	return apply_filters('default_feed', 'rss2');
 }
 
+/**
+ * Retrieve the blog title for the feed title.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 2.2.0
+ * @uses apply_filters() Calls 'get_wp_title_rss' hook on title.
+ * @uses wp_title() See function for $sep parameter usage.
+ *
+ * @param string $sep Optional.How to separate the title. See wp_title() for more info.
+ * @return string Error message on failure or blog title on success.
+ */
 function get_wp_title_rss($sep = '&#187;') {
 	$title = wp_title($sep, false);
 	if ( is_wp_error( $title ) )
@@ -21,22 +86,79 @@ function get_wp_title_rss($sep = '&#187;') {
 	return $title;
 }
 
+/**
+ * Display the blog title for display of the feed title.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 2.2.0
+ * @uses apply_filters() Calls 'wp_title_rss' on the blog title.
+ * @see wp_title() $sep parameter usage.
+ *
+ * @param string $sep Optional.
+ */
 function wp_title_rss($sep = '&#187;') {
 	echo apply_filters('wp_title_rss', get_wp_title_rss($sep));
 }
 
+/**
+ * Retrieve the current post title for the feed.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 2.0.0
+ * @uses apply_filters() Calls 'the_title_rss' on the post title.
+ *
+ * @return string Current post title.
+ */
 function get_the_title_rss() {
 	$title = get_the_title();
 	$title = apply_filters('the_title_rss', $title);
 	return $title;
 }
 
-
+/**
+ * Display the post title in the feed.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 0.71
+ * @uses get_the_title_rss() Used to retrieve current post title.
+ */
 function the_title_rss() {
 	echo get_the_title_rss();
 }
 
-
+/**
+ * Display the post content for the feed.
+ *
+ * For encoding the html or the $encode_html parameter, there are three possible
+ * values. '0' will make urls footnotes and use make_url_footnote(). '1' will
+ * encode special characters and automatically display all of the content. The
+ * value of '2' will strip all HTML tags from the content.
+ *
+ * Also note that you cannot set the amount of words and not set the html
+ * encoding. If that is the case, then the html encoding will default to 2,
+ * which will strip all HTML tags.
+ *
+ * To restrict the amount of words of the content, you can use the cut
+ * parameter. If the content is less than the amount, then there won't be any
+ * dots added to the end. If there is content left over, then dots will be added
+ * and the rest of the content will be removed.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 0.71
+ * @uses apply_filters() Calls 'the_content_rss' on the content before processing.
+ * @see get_the_content() For the $more_link_text, $stripteaser, and $more_file
+ *		parameters.
+ *
+ * @param string $more_link_text Optional. Text to display when more content is available but not displayed.
+ * @param int|bool $stripteaser Optional. Default is 0.
+ * @param string $more_file Optional.
+ * @param int $cut Optional. Amount of words to keep for the content.
+ * @param int $encode_html Optional. How to encode the content.
+ */
 function the_content_rss($more_link_text='(more...)', $stripteaser=0, $more_file='', $cut = 0, $encode_html = 0) {
 	$content = get_the_content($more_link_text, $stripteaser, $more_file);
 	$content = apply_filters('the_content_rss', $content);
@@ -59,6 +181,8 @@ function the_content_rss($more_link_text='(more...)', $stripteaser=0, $more_file
 			$k = count($blah);
 			$use_dotdotdot = 0;
 		}
+
+		/** @todo Check performance, might be faster to use array slice instead. */
 		for ( $i=0; $i<$k; $i++ )
 			$excerpt .= $blah[$i].' ';
 		$excerpt .= ($use_dotdotdot) ? '...' : '';
@@ -68,21 +192,51 @@ function the_content_rss($more_link_text='(more...)', $stripteaser=0, $more_file
 	echo $content;
 }
 
-
+/**
+ * Display the post excerpt for the feed.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 0.71
+ * @uses apply_filters() Calls 'the_excerpt_rss' hook on the excerpt.
+ */
 function the_excerpt_rss() {
 	$output = get_the_excerpt();
 	echo apply_filters('the_excerpt_rss', $output);
 }
 
+/**
+ * Display the permalink to the post for use in feeds.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 2.3.0
+ * @uses apply_filters() Call 'the_permalink_rss' on the post permalink
+ */
 function the_permalink_rss() {
 	echo apply_filters('the_permalink_rss', get_permalink());
-
 }
 
+/**
+ * Display the feed GUID for the current comment.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since unknown
+ */
 function comment_guid() {
 	echo get_comment_guid();
 }
 
+/**
+ * Retrieve the feed GUID for the current comment.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since unknown
+ *
+ * @return bool|string false on failure or guid for comment on success.
+ */
 function get_comment_guid() {
 	global $comment;
 
@@ -92,24 +246,71 @@ function get_comment_guid() {
 	return get_the_guid($comment->comment_post_ID) . '#comment-' . $comment->comment_ID;
 }
 
+/**
+ * Display the link to the comments.
+ *
+ * @since 1.5.0
+ */
 function comment_link() {
 	echo get_comment_link();
 }
 
+/**
+ * Retrieve the current comment author for use in the feeds.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 2.0.0
+ * @uses apply_filters() Calls 'comment_author_rss' hook on comment author.
+ * @uses get_comment_author()
+ *
+ * @return string Comment Author
+ */
 function get_comment_author_rss() {
 	return apply_filters('comment_author_rss', get_comment_author() );
 }
 
+/**
+ * Display the current comment author in the feed.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 1.0.0
+ */
 function comment_author_rss() {
 	echo get_comment_author_rss();
 }
 
+/**
+ * Display the current comment content for use in the feeds.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 1.0.0
+ * @uses apply_filters() Calls 'comment_text_rss' filter on comment content.
+ * @uses get_comment_text()
+ */
 function comment_text_rss() {
 	$comment_text = get_comment_text();
 	$comment_text = apply_filters('comment_text_rss', $comment_text);
 	echo $comment_text;
 }
 
+/**
+ * Retrieve all of the post categories, formatted for use in feeds.
+ *
+ * All of the categories for the current post in the feed loop, will be
+ * retrieved and have feed markup added, so that they can easily be added to the
+ * RSS2, Atom, or RSS1 and RSS0.91 RDF feeds.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 2.1.0
+ * @uses apply_filters() 
+ *
+ * @param string $type Optional, default is 'rss'. Either 'rss', 'atom', or 'rdf'.
+ * @return string All of the post categories for displaying in the feed.
+ */
 function get_the_category_rss($type = 'rss') {
 	$categories = get_the_category();
 	$tags = get_the_tags();
@@ -142,10 +343,29 @@ function get_the_category_rss($type = 'rss') {
 	return apply_filters('the_category_rss', $the_list, $type);
 }
 
+/**
+ * Display the post categories in the feed.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 0.71
+ * @see get_the_category_rss() For better explanation.
+ *
+ * @param string $type Optional, default is 'rss'. Either 'rss', 'atom', or 'rdf'.
+ */
 function the_category_rss($type = 'rss') {
 	echo get_the_category_rss($type);
 }
 
+/**
+ * Display the HTML type based on the blog setting.
+ *
+ * The two possible values are either 'xhtml' or 'html'.
+ *
+ * @package WordPress
+ * @subpackage Feed
+ * @since 2.2.0
+ */
 function html_type_rss() {
 	$type = get_bloginfo('html_type');
 	if (strpos($type, 'xhtml') !== false)
@@ -155,7 +375,24 @@ function html_type_rss() {
 	echo $type;
 }
 
-
+/**
+ * Display the rss enclosure for the current post.
+ *
+ * Uses the global $post to check whether the post requires a password and if
+ * the user has the password for the post. If not then it will return before
+ * displaying.
+ *
+ * Also uses the function get_post_custom() to get the post's 'enclosure'
+ * metadata field and parses the value to display the enclosure(s). The
+ * enclosure(s) consist of enclosure HTML tag(s) with a URI and other
+ * attributes.
+ *
+ * @package WordPress
+ * @subpackage Template
+ * @since 1.5.0
+ * @uses apply_filters() Calls 'rss_enclosure' hook on rss enclosure.
+ * @uses get_post_custom() To get the current post enclosure metadata.
+ */
 function rss_enclosure() {
 	global $post;
 	if ( !empty($post->post_password) && (!isset($_COOKIE['wp-postpass_'.COOKIEHASH]) || $_COOKIE['wp-postpass_'.COOKIEHASH] != $post->post_password) )
@@ -171,6 +408,23 @@ function rss_enclosure() {
 	}
 }
 
+/**
+ * Display the atom enclosure for the current post.
+ *
+ * Uses the global $post to check whether the post requires a password and if
+ * the user has the password for the post. If not then it will return before
+ * displaying.
+ *
+ * Also uses the function get_post_custom() to get the post's 'enclosure'
+ * metadata field and parses the value to display the enclosure(s). The
+ * enclosure(s) consist of link HTML tag(s) with a URI and other attributes.
+ *
+ * @package WordPress
+ * @subpackage Template
+ * @since 2.2.0
+ * @uses apply_filters() Calls 'atom_enclosure' hook on atom enclosure.
+ * @uses get_post_custom() To get the current post enclosure metadata.
+ */
 function atom_enclosure() {
 	global $post;
 	if ( !empty($post->post_password) && ($_COOKIE['wp-postpass_'.COOKIEHASH] != $post->post_password) )
@@ -187,7 +441,7 @@ function atom_enclosure() {
 }
 
 /**
- * prep_atom_text_construct() - Determine the type of a given string of data
+ * Determine the type of a string of data with the data formatted.
  *
  * Tell whether the type is text, html, or xhtml, per RFC 4287 section 3.1.
  *
@@ -202,8 +456,8 @@ function atom_enclosure() {
  * @subpackage Feed
  * @since 2.5
  *
- * @param string $data input string
- * @return array $result array(type, value)
+ * @param string $data Input string
+ * @return array array(type, value)
  */
 function prep_atom_text_construct($data) {
 	if (strpos($data, '<') === false && strpos($data, '&') === false) {
@@ -232,14 +486,13 @@ function prep_atom_text_construct($data) {
 }
 
 /**
- * self_link() - Generate a correct link for the atom:self elemet
+ * Display the link for the currently displayed feed in a XSS safe way.
  *
- * Echo the link for the currently displayed feed in a XSS safe way.
+ * Generate a correct link for the atom:self element.
  *
  * @package WordPress
  * @subpackage Feed
  * @since 2.5
- *
  */
 function self_link() {
 	echo 'http'
-- 
cgit