WordPress/wp-includes/theme.php

1110 lines
32 KiB
PHP

<?php
/**
* Theme, template, and stylesheet functions.
*
* @package WordPress
* @subpackage Template
*/
/**
* Retrieve name of the current stylesheet.
*
* The theme name that the administrator has currently set the front end theme
* as.
*
* For all extensive purposes, the template name and the stylesheet name are
* going to be the same for most cases.
*
* @since 1.5.0
* @uses apply_filters() Calls 'stylesheet' filter on stylesheet name.
*
* @return string Stylesheet name.
*/
function get_stylesheet() {
return apply_filters('stylesheet', get_option('stylesheet'));
}
/**
* Retrieve stylesheet directory path for current theme.
*
* @since 1.5.0
* @uses apply_filters() Calls 'stylesheet_directory' filter on stylesheet directory and theme name.
*
* @return string Path to current theme directory.
*/
function get_stylesheet_directory() {
$stylesheet = get_stylesheet();
$stylesheet_dir = get_theme_root() . "/$stylesheet";
return apply_filters('stylesheet_directory', $stylesheet_dir, $stylesheet);
}
/**
* Retrieve stylesheet directory URI.
*
* @since 1.5.0
*
* @return string
*/
function get_stylesheet_directory_uri() {
$stylesheet = get_stylesheet();
$stylesheet_dir_uri = get_theme_root_uri() . "/$stylesheet";
return apply_filters('stylesheet_directory_uri', $stylesheet_dir_uri, $stylesheet);
}
/**
* Retrieve URI of current theme stylesheet.
*
* The stylesheet file name is 'style.css' which is appended to {@link
* get_stylesheet_directory_uri() stylesheet directory URI} path.
*
* @since 1.5.0
* @uses apply_filters() Calls 'stylesheet_uri' filter on stylesheet URI path and stylesheet directory URI.
*
* @return string
*/
function get_stylesheet_uri() {
$stylesheet_dir_uri = get_stylesheet_directory_uri();
$stylesheet_uri = $stylesheet_dir_uri . "/style.css";
return apply_filters('stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri);
}
/**
* Retrieve localized stylesheet URI.
*
* The stylesheet directory for the localized stylesheet files are located, by
* default, in the base theme directory. The name of the locale file will be the
* locale followed by '.css'. If that does not exist, then the text direction
* stylesheet will be checked for existence, for example 'ltr.css'.
*
* The theme may change the location of the stylesheet directory by either using
* the 'stylesheet_directory_uri' filter or the 'locale_stylesheet_uri' filter.
* If you want to change the location of the stylesheet files for the entire
* WordPress workflow, then change the former. If you just have the locale in a
* separate folder, then change the latter.
*
* @since 2.1.0
* @uses apply_filters() Calls 'locale_stylesheet_uri' filter on stylesheet URI path and stylesheet directory URI.
*
* @return string
*/
function get_locale_stylesheet_uri() {
global $wp_locale;
$stylesheet_dir_uri = get_stylesheet_directory_uri();
$dir = get_stylesheet_directory();
$locale = get_locale();
if ( file_exists("$dir/$locale.css") )
$stylesheet_uri = "$stylesheet_dir_uri/$locale.css";
elseif ( !empty($wp_locale->text_direction) && file_exists("$dir/{$wp_locale->text_direction}.css") )
$stylesheet_uri = "$stylesheet_dir_uri/{$wp_locale->text_direction}.css";
else
$stylesheet_uri = '';
return apply_filters('locale_stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri);
}
/**
* Retrieve name of the current theme.
*
* @since 1.5.0
* @uses apply_filters() Calls 'template' filter on template option.
*
* @return string Template name.
*/
function get_template() {
return apply_filters('template', get_option('template'));
}
/**
* Retrieve current theme directory.
*
* @since 1.5.0
* @uses apply_filters() Calls 'template_directory' filter on template directory path and template name.
*
* @return string Template directory path.
*/
function get_template_directory() {
$template = get_template();
$template_dir = get_theme_root() . "/$template";
return apply_filters('template_directory', $template_dir, $template);
}
/**
* Retrieve theme directory URI.
*
* @since 1.5.0
* @uses apply_filters() Calls 'template_directory_uri' filter on template directory URI path and template name.
*
* @return string Template directory URI.
*/
function get_template_directory_uri() {
$template = get_template();
$template_dir_uri = get_theme_root_uri() . "/$template";
return apply_filters('template_directory_uri', $template_dir_uri, $template);
}
/**
* Retrieve theme data from parsed theme file.
*
* The description will have the tags filtered with the following HTML elements
* whitelisted. The <b>'a'</b> element with the <em>href</em> and <em>title</em>
* attributes. The <b>abbr</b> element with the <em>title</em> attribute. The
* <b>acronym<b> element with the <em>title</em> attribute allowed. The
* <b>code</b>, <b>em</b>, and <b>strong</b> elements also allowed.
*
* The style.css file must contain theme name, theme URI, and description. The
* data can also contain author URI, author, template (parent template),
* version, status, and finally tags. Some of these are not used by WordPress
* administration panels, but are used by theme directory web sites which list
* the theme.
*
* @since 1.5.0
*
* @param string $theme_file Theme file path.
* @return array Theme data.
*/
function get_theme_data( $theme_file ) {
$themes_allowed_tags = array(
'a' => array(
'href' => array(),'title' => array()
),
'abbr' => array(
'title' => array()
),
'acronym' => array(
'title' => array()
),
'code' => array(),
'em' => array(),
'strong' => array()
);
$theme_data = implode( '', file( $theme_file ) );
$theme_data = str_replace ( '\r', '\n', $theme_data );
preg_match( '|Theme Name:(.*)$|mi', $theme_data, $theme_name );
preg_match( '|Theme URI:(.*)$|mi', $theme_data, $theme_uri );
preg_match( '|Description:(.*)$|mi', $theme_data, $description );
if ( preg_match( '|Author URI:(.*)$|mi', $theme_data, $author_uri ) )
$author_uri = clean_url( trim( $author_uri[1]) );
else
$author_uti = '';
if ( preg_match( '|Template:(.*)$|mi', $theme_data, $template ) )
$template = wp_kses( trim( $template[1] ), $themes_allowed_tags );
else
$template = '';
if ( preg_match( '|Version:(.*)|i', $theme_data, $version ) )
$version = wp_kses( trim( $version[1] ), $themes_allowed_tags );
else
$version = '';
if ( preg_match('|Status:(.*)|i', $theme_data, $status) )
$status = wp_kses( trim( $status[1] ), $themes_allowed_tags );
else
$status = 'publish';
if ( preg_match('|Tags:(.*)|i', $theme_data, $tags) )
$tags = array_map( 'trim', explode( ',', wp_kses( trim( $tags[1] ), array() ) ) );
else
$tags = array();
$name = $theme = wp_kses( trim( $theme_name[1] ), $themes_allowed_tags );
$theme_uri = clean_url( trim( $theme_uri[1] ) );
$description = wptexturize( wp_kses( trim( $description[1] ), $themes_allowed_tags ) );
if ( preg_match( '|Author:(.*)$|mi', $theme_data, $author_name ) ) {
if ( empty( $author_uri ) ) {
$author = wp_kses( trim( $author_name[1] ), $themes_allowed_tags );
} else {
$author = sprintf( '<a href="%1$s" title="%2$s">%3$s</a>', $author_uri, __( 'Visit author homepage' ), wp_kses( trim( $author_name[1] ), $themes_allowed_tags ) );
}
} else {
$author = __('Anonymous');
}
return array( 'Name' => $name, 'Title' => $theme, 'URI' => $theme_uri, 'Description' => $description, 'Author' => $author, 'Version' => $version, 'Template' => $template, 'Status' => $status, 'Tags' => $tags );
}
/**
* Retrieve list of themes with theme data in theme directory.
*
* The theme is broken, if it doesn't have a parent theme and is missing either
* style.css and, or index.php. If the theme has a parent theme then it is
* broken, if it is missing style.css; index.php is optional. The broken theme
* list is saved in the {@link $wp_broken_themes} global, which is displayed on
* the theme list in the administration panels.
*
* @since 1.5.0
* @global array $wp_broken_themes Stores the broken themes.
* @global array $wp_themes Stores the working themes.
*
* @return array Theme list with theme data.
*/
function get_themes() {
global $wp_themes, $wp_broken_themes;
if ( isset($wp_themes) )
return $wp_themes;
$themes = array();
$wp_broken_themes = array();
$theme_loc = $theme_root = get_theme_root();
if ( '/' != WP_CONTENT_DIR ) // don't want to replace all forward slashes, see Trac #4541
$theme_loc = str_replace(WP_CONTENT_DIR, '', $theme_root);
// Files in wp-content/themes directory and one subdir down
$themes_dir = @ opendir($theme_root);
if ( !$themes_dir )
return false;
while ( ($theme_dir = readdir($themes_dir)) !== false ) {
if ( is_dir($theme_root . '/' . $theme_dir) && is_readable($theme_root . '/' . $theme_dir) ) {
if ( $theme_dir{0} == '.' || $theme_dir == '..' || $theme_dir == 'CVS' )
continue;
$stylish_dir = @ opendir($theme_root . '/' . $theme_dir);
$found_stylesheet = false;
while ( ($theme_file = readdir($stylish_dir)) !== false ) {
if ( $theme_file == 'style.css' ) {
$theme_files[] = $theme_dir . '/' . $theme_file;
$found_stylesheet = true;
break;
}
}
@closedir($stylish_dir);
if ( !$found_stylesheet ) { // look for themes in that dir
$subdir = "$theme_root/$theme_dir";
$subdir_name = $theme_dir;
$theme_subdir = @ opendir( $subdir );
while ( ($theme_dir = readdir($theme_subdir)) !== false ) {
if ( is_dir( $subdir . '/' . $theme_dir) && is_readable($subdir . '/' . $theme_dir) ) {
if ( $theme_dir{0} == '.' || $theme_dir == '..' || $theme_dir == 'CVS' )
continue;
$stylish_dir = @ opendir($subdir . '/' . $theme_dir);
$found_stylesheet = false;
while ( ($theme_file = readdir($stylish_dir)) !== false ) {
if ( $theme_file == 'style.css' ) {
$theme_files[] = $subdir_name . '/' . $theme_dir . '/' . $theme_file;
$found_stylesheet = true;
break;
}
}
@closedir($stylish_dir);
}
}
@closedir($theme_subdir);
$wp_broken_themes[$theme_dir] = array('Name' => $theme_dir, 'Title' => $theme_dir, 'Description' => __('Stylesheet is missing.'));
}
}
}
if ( is_dir( $theme_dir ) )
@closedir( $theme_dir );
if ( !$themes_dir || !$theme_files )
return $themes;
sort($theme_files);
foreach ( (array) $theme_files as $theme_file ) {
if ( !is_readable("$theme_root/$theme_file") ) {
$wp_broken_themes[$theme_file] = array('Name' => $theme_file, 'Title' => $theme_file, 'Description' => __('File not readable.'));
continue;
}
$theme_data = get_theme_data("$theme_root/$theme_file");
$name = $theme_data['Name'];
$title = $theme_data['Title'];
$description = wptexturize($theme_data['Description']);
$version = $theme_data['Version'];
$author = $theme_data['Author'];
$template = $theme_data['Template'];
$stylesheet = dirname($theme_file);
$screenshot = false;
foreach ( array('png', 'gif', 'jpg', 'jpeg') as $ext ) {
if (file_exists("$theme_root/$stylesheet/screenshot.$ext")) {
$screenshot = "screenshot.$ext";
break;
}
}
if ( empty($name) ) {
$name = dirname($theme_file);
$title = $name;
}
if ( empty($template) ) {
if ( file_exists(dirname("$theme_root/$theme_file/index.php")) )
$template = dirname($theme_file);
else
continue;
}
$template = trim($template);
if ( !file_exists("$theme_root/$template/index.php") ) {
$parent_dir = dirname(dirname($theme_file));
if ( file_exists("$theme_root/$parent_dir/$template/index.php") ) {
$template = "$parent_dir/$template";
} else {
$wp_broken_themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => __('Template is missing.'));
continue;
}
}
$stylesheet_files = array();
$template_files = array();
$stylesheet_dir = @ dir("$theme_root/$stylesheet");
if ( $stylesheet_dir ) {
while ( ($file = $stylesheet_dir->read()) !== false ) {
if ( !preg_match('|^\.+$|', $file) ) {
if ( preg_match('|\.css$|', $file) )
$stylesheet_files[] = "$theme_loc/$stylesheet/$file";
elseif ( preg_match('|\.php$|', $file) )
$template_files[] = "$theme_loc/$stylesheet/$file";
}
}
}
$template_dir = @ dir("$theme_root/$template");
if ( $template_dir ) {
while(($file = $template_dir->read()) !== false) {
if ( !preg_match('|^\.+$|', $file) && preg_match('|\.php$|', $file) )
$template_files[] = "$theme_loc/$template/$file";
}
}
$template_dir = dirname($template_files[0]);
$stylesheet_dir = dirname($stylesheet_files[0]);
if ( empty($template_dir) )
$template_dir = '/';
if ( empty($stylesheet_dir) )
$stylesheet_dir = '/';
// Check for theme name collision. This occurs if a theme is copied to
// a new theme directory and the theme header is not updated. Whichever
// theme is first keeps the name. Subsequent themes get a suffix applied.
// The Default and Classic themes always trump their pretenders.
if ( isset($themes[$name]) ) {
if ( ('WordPress Default' == $name || 'WordPress Classic' == $name) &&
('default' == $stylesheet || 'classic' == $stylesheet) ) {
// If another theme has claimed to be one of our default themes, move
// them aside.
$suffix = $themes[$name]['Stylesheet'];
$new_name = "$name/$suffix";
$themes[$new_name] = $themes[$name];
$themes[$new_name]['Name'] = $new_name;
} else {
$name = "$name/$stylesheet";
}
}
$themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => $description, 'Author' => $author, 'Version' => $version, 'Template' => $template, 'Stylesheet' => $stylesheet, 'Template Files' => $template_files, 'Stylesheet Files' => $stylesheet_files, 'Template Dir' => $template_dir, 'Stylesheet Dir' => $stylesheet_dir, 'Status' => $theme_data['Status'], 'Screenshot' => $screenshot, 'Tags' => $theme_data['Tags']);
}
// Resolve theme dependencies.
$theme_names = array_keys($themes);
foreach ( (array) $theme_names as $theme_name ) {
$themes[$theme_name]['Parent Theme'] = '';
if ( $themes[$theme_name]['Stylesheet'] != $themes[$theme_name]['Template'] ) {
foreach ( (array) $theme_names as $parent_theme_name ) {
if ( ($themes[$parent_theme_name]['Stylesheet'] == $themes[$parent_theme_name]['Template']) && ($themes[$parent_theme_name]['Template'] == $themes[$theme_name]['Template']) ) {
$themes[$theme_name]['Parent Theme'] = $themes[$parent_theme_name]['Name'];
break;
}
}
}
}
$wp_themes = $themes;
return $themes;
}
/**
* Retrieve theme data.
*
* @since 1.5.0
*
* @param string $theme Theme name.
* @return array|null Null, if theme name does not exist. Theme data, if exists.
*/
function get_theme($theme) {
$themes = get_themes();
if ( array_key_exists($theme, $themes) )
return $themes[$theme];
return null;
}
/**
* Retrieve current theme display name.
*
* If the 'current_theme' option has already been set, then it will be returned
* instead. If it is not set, then each theme will be iterated over until both
* the current stylesheet and current template name.
*
* @since 1.5.0
*
* @return string
*/
function get_current_theme() {
if ( $theme = get_option('current_theme') )
return $theme;
$themes = get_themes();
$theme_names = array_keys($themes);
$current_template = get_option('template');
$current_stylesheet = get_option('stylesheet');
$current_theme = 'WordPress Default';
if ( $themes ) {
foreach ( (array) $theme_names as $theme_name ) {
if ( $themes[$theme_name]['Stylesheet'] == $current_stylesheet &&
$themes[$theme_name]['Template'] == $current_template ) {
$current_theme = $themes[$theme_name]['Name'];
break;
}
}
}
update_option('current_theme', $current_theme);
return $current_theme;
}
/**
* Retrieve path to themes directory.
*
* Does not have trailing slash.
*
* @since 1.5.0
* @uses apply_filters() Calls 'theme_root' filter on path.
*
* @return string Theme path.
*/
function get_theme_root() {
return apply_filters('theme_root', WP_CONTENT_DIR . "/themes");
}
/**
* Retrieve URI for themes directory.
*
* Does not have trailing slash.
*
* @since 1.5.0
*
* @return string Themes URI.
*/
function get_theme_root_uri() {
return apply_filters('theme_root_uri', content_url('themes'), get_option('siteurl'));
}
/**
* Retrieve path to file without the use of extension.
*
* Used to quickly retrieve the path of file without including the file
* extension. It will also check the parent template, if the file exists, with
* the use of {@link locate_template()}. Allows for more generic file location
* without the use of the other get_*_template() functions.
*
* Can be used with include() or require() to retrieve path.
* <code>
* if( '' != get_query_template( '404' ) )
* include( get_query_template( '404' ) );
* </code>
* or the same can be accomplished with
* <code>
* if( '' != get_404_template() )
* include( get_404_template() );
* </code>
*
* @since 1.5.0
*
* @param string $type Filename without extension.
* @return string Full path to file.
*/
function get_query_template($type) {
$type = preg_replace( '|[^a-z0-9-]+|', '', $type );
return apply_filters("{$type}_template", locate_template(array("{$type}.php")));
}
/**
* Retrieve path of 404 template in current or parent template.
*
* @since 1.5.0
*
* @return string
*/
function get_404_template() {
return get_query_template('404');
}
/**
* Retrieve path of archive template in current or parent template.
*
* @since 1.5.0
*
* @return string
*/
function get_archive_template() {
return get_query_template('archive');
}
/**
* Retrieve path of author template in current or parent template.
*
* @since 1.5.0
*
* @return string
*/
function get_author_template() {
return get_query_template('author');
}
/**
* Retrieve path of category template in current or parent template.
*
* Works by retrieving the current category ID, for example 'category-1.php' and
* will fallback to category.php template, if the ID category file doesn't
* exist.
*
* @since 1.5.0
* @uses apply_filters() Calls 'category_template' on file path of category template.
*
* @return string
*/
function get_category_template() {
$template = locate_template(array("category-" . absint( get_query_var('cat') ) . '.php', 'category.php'));
return apply_filters('category_template', $template);
}
/**
* Retrieve path of tag template in current or parent template.
*
* Works by retrieving the current tag ID, for example 'tag-1.php' and will
* fallback to tag.php template, if the ID tag file doesn't exist.
*
* @since 2.3.0
* @uses apply_filters() Calls 'tag_template' on file path of tag template.
*
* @return string
*/
function get_tag_template() {
$template = locate_template(array("tag-" . absint( get_query_var('tag') ) . '.php', 'tag.php'));
return apply_filters('tag_template', $template);
}
/**
* Retrieve path of taxonomy template in current or parent template.
*
* Retrieves the taxonomy and term, if term is available. The template is
* prepended with 'taxonomy-' and followed by both the taxonomy string and
* the taxonomy string followed by a dash and then followed by the term.
*
* The taxonomy and term template is checked and used first, if it exists.
* Second, just the taxonomy template is checked, and then finally, taxonomy.php
* template is used. If none of the files exist, then it will fall back on to
* index.php.
*
* @since unknown (2.6.0 most likely)
* @uses apply_filters() Calls 'taxonomy_template' filter on found path.
*
* @return string
*/
function get_taxonomy_template() {
$taxonomy = get_query_var('taxonomy');
$term = get_query_var('term');
$templates = array();
if ( $taxonomy && $term )
$templates[] = "taxonomy-$taxonomy-$term.php";
if ( $taxonomy )
$templates[] = "taxonomy-$taxonomy.php";
$templates[] = "taxonomy.php";
$template = locate_template($templates);
return apply_filters('taxonomy_template', $template);
}
/**
* Retrieve path of date template in current or parent template.
*
* @since 1.5.0
*
* @return string
*/
function get_date_template() {
return get_query_template('date');
}
/**
* Retrieve path of home template in current or parent template.
*
* Attempts to locate 'home.php' first before falling back to 'index.php'.
*
* @since 1.5.0
* @uses apply_filters() Calls 'home_template' on file path of home template.
*
* @return string
*/
function get_home_template() {
$template = locate_template(array('home.php', 'index.php'));
return apply_filters('home_template', $template);
}
/**
* Retrieve path of page template in current or parent template.
*
* First attempt is to look for the file in the '_wp_page_template' page meta
* data. The second attempt, if the first has a file and is not empty, is to
* look for 'page.php'.
*
* @since 1.5.0
*
* @return string
*/
function get_page_template() {
global $wp_query;
$id = (int) $wp_query->post->ID;
$template = get_post_meta($id, '_wp_page_template', true);
if ( 'default' == $template )
$template = '';
$templates = array();
if ( !empty($template) && !validate_file($template) )
$templates[] = $template;
$templates[] = "page.php";
return apply_filters('page_template', locate_template($templates));
}
/**
* Retrieve path of paged template in current or parent template.
*
* @since 1.5.0
*
* @return string
*/
function get_paged_template() {
return get_query_template('paged');
}
/**
* Retrieve path of search template in current or parent template.
*
* @since 1.5.0
*
* @return string
*/
function get_search_template() {
return get_query_template('search');
}
/**
* Retrieve path of single template in current or parent template.
*
* @since 1.5.0
*
* @return string
*/
function get_single_template() {
return get_query_template('single');
}
/**
* Retrieve path of attachment template in current or parent template.
*
* The attachment path first checks if the first part of the mime type exists.
* The second check is for the second part of the mime type. The last check is
* for both types separated by an underscore. If neither are found then the file
* 'attachment.php' is checked and returned.
*
* Some examples for the 'text/plain' mime type are 'text.php', 'plain.php', and
* finally 'text_plain.php'.
*
* @since 2.0.0
*
* @return string
*/
function get_attachment_template() {
global $posts;
$type = explode('/', $posts[0]->post_mime_type);
if ( $template = get_query_template($type[0]) )
return $template;
elseif ( $template = get_query_template($type[1]) )
return $template;
elseif ( $template = get_query_template("$type[0]_$type[1]") )
return $template;
else
return get_query_template('attachment');
}
/**
* Retrieve path of comment popup template in current or parent template.
*
* Checks for comment popup template in current template, if it exists or in the
* parent template. If it doesn't exist, then it retrieves the comment-popup.php
* file from the default theme. The default theme must then exist for it to
* work.
*
* @since 1.5.0
* @uses apply_filters() Calls 'comments_popup_template' filter on path.
*
* @return string
*/
function get_comments_popup_template() {
$template = locate_template(array("comments-popup.php"));
if ('' == $template)
$template = get_theme_root() . '/default/comments-popup.php';
return apply_filters('comments_popup_template', $template);
}
/**
* Retrieve the name of the highest priority template file that exists.
*
* Searches in the STYLESHEETPATH before TEMPLATEPATH so that themes which
* inherit from a parent theme can just overload one file.
*
* @since 2.7.0
*
* @param array $template_names Array of template files to search for in priority order.
* @param bool $load If true the template file will be loaded if it is found.
* @return string The template filename if one is located.
*/
function locate_template($template_names, $load = false) {
if (!is_array($template_names))
return '';
$located = '';
foreach($template_names as $template_name) {
if ( file_exists(STYLESHEETPATH . '/' . $template_name)) {
$located = STYLESHEETPATH . '/' . $template_name;
break;
} else if ( file_exists(TEMPLATEPATH . '/' . $template_name) ) {
$located = TEMPLATEPATH . '/' . $template_name;
break;
}
}
if ($load && '' != $located)
load_template($located);
return $located;
}
/**
* Require once the template file with WordPress environment.
*
* The globals are set up for the template file to ensure that the WordPress
* environment is available from within the function. The query variables are
* also available.
*
* @since 1.5.0
*
* @param string $_template_file Path to template file.
*/
function load_template($_template_file) {
global $posts, $post, $wp_did_header, $wp_did_template_redirect, $wp_query, $wp_rewrite, $wpdb, $wp_version, $wp, $id, $comment, $user_ID;
if ( is_array($wp_query->query_vars) )
extract($wp_query->query_vars, EXTR_SKIP);
require_once($_template_file);
}
/**
* Display localized stylesheet link element.
*
* @since 2.1.0
*/
function locale_stylesheet() {
$stylesheet = get_locale_stylesheet_uri();
if ( empty($stylesheet) )
return;
echo '<link rel="stylesheet" href="' . $stylesheet . '" type="text/css" media="screen" />';
}
/**
* Start preview theme output buffer.
*
* Will only preform task if the user has permissions and template and preview
* query variables exist.
*
* @since 2.5.0
*/
function preview_theme() {
if ( ! (isset($_GET['template']) && isset($_GET['preview'])) )
return;
if ( !current_user_can( 'switch_themes' ) )
return;
$_GET['template'] = preg_replace('|[^a-z0-9_.-]|i', '', $_GET['template']);
if ( validate_file($_GET['template']) )
return;
add_filter('template', create_function('', "return '{$_GET['template']}';") );
if ( isset($_GET['stylesheet']) ) {
$_GET['stylesheet'] = preg_replace('|[^a-z0-9_.-]|i', '', $_GET['stylesheet']);
if ( validate_file($_GET['stylesheet']) )
return;
add_filter('stylesheet', create_function('', "return '{$_GET['stylesheet']}';") );
}
ob_start( 'preview_theme_ob_filter' );
}
add_action('setup_theme', 'preview_theme');
/**
* Callback function for ob_start() to capture all links in the theme.
*
* @since unknown
* @access private
*
* @param string $content
* @return string
*/
function preview_theme_ob_filter( $content ) {
return preg_replace_callback( "|(<a.*?href=([\"']))(.*?)([\"'].*?>)|", 'preview_theme_ob_filter_callback', $content );
}
/**
* Manipulates preview theme links in order to control and maintain location.
*
* Callback function for preg_replace_callback() to accept and filter matches.
*
* @since unknown
* @access private
*
* @param array $matches
* @return string
*/
function preview_theme_ob_filter_callback( $matches ) {
if (
( false !== strpos($matches[3], '/wp-admin/') )
||
( false !== strpos($matches[3], '://') && 0 !== strpos($matches[3], get_option('home')) )
||
( false !== strpos($matches[3], '/feed/') )
||
( false !== strpos($matches[3], '/trackback/') )
)
return $matches[1] . "#$matches[2] onclick=$matches[2]return false;" . $matches[4];
$link = add_query_arg( array('preview' => 1, 'template' => $_GET['template'], 'stylesheet' => @$_GET['stylesheet'] ), $matches[3] );
if ( 0 === strpos($link, 'preview=1') )
$link = "?$link";
return $matches[1] . attribute_escape( $link ) . $matches[4];
}
/**
* Switches current theme to new template and stylesheet names.
*
* @since unknown
* @uses do_action() Calls 'switch_theme' action on updated theme display name.
*
* @param string $template Template name
* @param string $stylesheet Stylesheet name.
*/
function switch_theme($template, $stylesheet) {
update_option('template', $template);
update_option('stylesheet', $stylesheet);
delete_option('current_theme');
$theme = get_current_theme();
do_action('switch_theme', $theme);
}
/**
* Checks that current theme files 'index.php' and 'style.css' exists.
*
* Does not check the 'default' theme. The 'default' theme should always exist
* or should have another theme renamed to that template name and directory
* path. Will switch theme to default if current theme does not validate.
*
* @since 1.5.0
*
* @return bool
*/
function validate_current_theme() {
// Don't validate during an install/upgrade.
if ( defined('WP_INSTALLING') )
return true;
if ( get_template() != 'default' && !file_exists(get_template_directory() . '/index.php') ) {
switch_theme('default', 'default');
return false;
}
if ( get_stylesheet() != 'default' && !file_exists(get_template_directory() . '/style.css') ) {
switch_theme('default', 'default');
return false;
}
return true;
}
/**
* Retrieve theme modification value for the current theme.
*
* If the modification name does not exist, then the $default will be passed
* through {@link http://php.net/sprintf sprintf()} PHP function with the first
* string the template directory URI and the second string the stylesheet
* directory URI.
*
* @since 2.1.0
* @uses apply_filters() Calls 'theme_mod_$name' filter on the value.
*
* @param string $name Theme modification name.
* @param bool|string $default
* @return string
*/
function get_theme_mod($name, $default = false) {
$theme = get_current_theme();
$mods = get_option("mods_$theme");
if ( isset($mods[$name]) )
return apply_filters( "theme_mod_$name", $mods[$name] );
return apply_filters( "theme_mod_$name", sprintf($default, get_template_directory_uri(), get_stylesheet_directory_uri()) );
}
/**
* Update theme modification value for the current theme.
*
* @since 2.1.0
*
* @param string $name Theme modification name.
* @param string $value theme modification value.
*/
function set_theme_mod($name, $value) {
$theme = get_current_theme();
$mods = get_option("mods_$theme");
$mods[$name] = $value;
update_option("mods_$theme", $mods);
wp_cache_delete("mods_$theme", 'options');
}
/**
* Remove theme modification name from current theme list.
*
* If removing the name also removes all elements, then the entire option will
* be removed.
*
* @since 2.1.0
*
* @param string $name Theme modification name.
* @return null
*/
function remove_theme_mod( $name ) {
$theme = get_current_theme();
$mods = get_option("mods_$theme");
if ( !isset($mods[$name]) )
return;
unset($mods[$name]);
if ( empty($mods) )
return remove_theme_mods();
update_option("mods_$theme", $mods);
wp_cache_delete("mods_$theme", 'options');
}
/**
* Remove theme modifications option for current theme.
*
* @since 2.1.0
*/
function remove_theme_mods() {
$theme = get_current_theme();
delete_option("mods_$theme");
}
/**
* Retrieve text color for custom header.
*
* @since 2.1.0
* @uses HEADER_TEXTCOLOR
*
* @return string
*/
function get_header_textcolor() {
return get_theme_mod('header_textcolor', HEADER_TEXTCOLOR);
}
/**
* Display text color for custom header.
*
* @since 2.1.0
*/
function header_textcolor() {
echo get_header_textcolor();
}
/**
* Retrieve header image for custom header.
*
* @since 2.1.0
* @uses HEADER_IMAGE
*
* @return string
*/
function get_header_image() {
return get_theme_mod('header_image', HEADER_IMAGE);
}
/**
* Display header image path.
*
* @since 2.1.0
*/
function header_image() {
echo get_header_image();
}
/**
* Add callbacks for image header display.
*
* The parameter $header_callback callback will be required to display the
* content for the 'wp_head' action. The parameter $admin_header_callback
* callback will be added to Custom_Image_Header class and that will be added
* to the 'admin_menu' action.
*
* @since 2.1.0
* @uses Custom_Image_Header Sets up for $admin_header_callback for administration panel display.
*
* @param callback $header_callback Call on 'wp_head' action.
* @param callback $admin_header_callback Call on administration panels.
*/
function add_custom_image_header($header_callback, $admin_header_callback) {
if ( ! empty($header_callback) )
add_action('wp_head', $header_callback);
if ( ! is_admin() )
return;
require_once(ABSPATH . 'wp-admin/custom-header.php');
$GLOBALS['custom_image_header'] =& new Custom_Image_Header($admin_header_callback);
add_action('admin_menu', array(&$GLOBALS['custom_image_header'], 'init'));
}
?>