Extend is_single(), is_page(), is_category(), and is_author() to accept an optional argument which designates a particular id, name, or nicename.

git-svn-id: http://svn.automattic.com/wordpress/trunk@1728 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/classes.php

@@ -3,6 +3,8 @@
 class WP_Query {
 	var $query;
 	var $query_vars;
+	var $queried_object;
+	var $queried_object_id;
 
 	var $posts;
 	var $post_count = 0;
@@ -43,6 +45,8 @@ class WP_Query {
 		unset($this->posts);
 		unset($this->query);
 		unset($this->query_vars);
+		unset($this->queried_object);
+		unset($this->queried_object_id);
 		$this->post_count = 0;
 		$this->current_post = -1;
 	}
@@ -522,7 +526,7 @@ class WP_Query {
 		$this->posts = apply_filters('the_posts', $this->posts);
 		$this->post_count = count($this->posts);
 		if ($this->post_count > 0) {
-			$this->post = $posts[0];
+			$this->post = $this->posts[0];
 		}
 
 		update_post_caches($this->posts);
@@ -553,6 +557,47 @@ class WP_Query {
 		return $this->get_posts();
 	}
 
+	function get_queried_object() {
+		if (isset($this->queried_object)) {
+			return $this->queried_object;
+		}
+
+		$this->queried_object = NULL;
+		$this->queried_object_id = 0;
+
+		if ($this->is_category) {
+			global $cache_categories;
+			if (isset($cache_categories[$this->get('cat')])) {
+				$this->queried_object = $cache_categories[$this->get('cat')];
+				$this->queried_object_id = $this->get('cat');
+			}
+		} else if ($this->is_single) {
+			$this->queried_object = $this->post;
+			$this->queried_object_id = $this->post->ID;
+		} else if ($this->is_page) {
+			$this->queried_object = $this->post;
+			$this->queried_object_id = $this->post->ID;
+		} else if ($this->is_author) {
+			global $cache_userdata;
+			if (isset($cache_userdata[$this->get('author')])) {
+				$this->queried_object = $cache_userdata[$this->get('author')];
+				$this->queried_object_id = $this->get('author');
+			}
+		}
+
+		return $this->queried_object;
+	}
+
+	function get_queried_object_id() {
+		$this->get_queried_object();
+
+		if (isset($this->queried_object_id)) {
+			return $this->queried_object_id;
+		}
+
+		return 0;
+	}
+
 	function WP_Query ($query = '') {
 		if (! empty($query)) {
 			$this->query($query);

wp-includes/functions.php

@@ -1604,16 +1604,52 @@ function wp_head() {
 	do_action('wp_head', '');
 }
 
-function is_single () {
-    global $wp_query;
+function is_single ($post = '') {
+	global $wp_query;
 
-    return $wp_query->is_single;
+	if (! $wp_query->is_single) {
+		return false;
+	}
+
+	if (empty($post)) {
+		return true;
+	}
+
+	$post_obj = $wp_query->get_queried_object();
+
+	if ($post == $post_obj->ID) {
+		return true;
+	} else if ($post == $post_obj->post_title) {
+		return true;
+	} else if ($post == $post_obj->post_name) {
+		return true;
+	}
+
+	return false;
 }
 
-function is_page () {
-    global $wp_query;
+function is_page ($page = '') {
+	global $wp_query;
 
-    return $wp_query->is_page;
+	if (! $wp_query->is_page) {
+		return false;
+	}
+
+	if (empty($page)) {
+		return true;
+	}
+
+	$page_obj = $wp_query->get_queried_object();
+		
+	if ($page == $page_obj->ID) {
+		return true;
+	} else if ($page == $page_obj->post_title) {
+		return true;
+	} else if ($page == $page_obj->post_name) {
+		return true;
+	}
+
+	return false;
 }
 
 function is_archive () {
@@ -1652,16 +1688,52 @@ function is_time () {
     return $wp_query->is_time;
 }
 
-function is_author () {
-    global $wp_query;
+function is_author ($author = '') {
+	global $wp_query;
 
-    return $wp_query->is_author;
+	if (! $wp_query->is_author) {
+		return false;
+	}
+
+	if (empty($author)) {
+		return true;
+	}
+
+	$author_obj = $wp_query->get_queried_object();
+		
+	if ($author == $author_obj->ID) {
+		return true;
+	} else if ($author == $author_obj->user_nickname) {
+		return true;
+	} else if ($author == $author_obj->user_nicename) {
+		return true;
+	}
+
+	return false;
 }
 
-function is_category () {
-    global $wp_query;
+function is_category ($category = '') {
+	global $wp_query;
 
-    return $wp_query->is_category;
+	if (! $wp_query->is_category) {
+		return false;
+	}
+
+	if (empty($category)) {
+		return true;
+	}
+
+	$cat_obj = $wp_query->get_queried_object();
+		
+	if ($category == $cat_obj->cat_ID) {
+		return true;
+	} else if ($category == $cat_obj->cat_name) {
+		return true;
+	} else if ($category == $cat_obj->category_nicename) {
+		return true;
+	}
+
+	return false;
 }
 
 function is_search () {