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1200 lines (1086 loc) · 37.4 KB
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<?php
/**
* WP_Theme Class
*
* @package WordPress
* @subpackage Theme
*/
final class WP_Theme implements ArrayAccess {
/**
* Headers for style.css files.
*
* @static
* @access private
* @var array
*/
private static $file_headers = array(
'Name' => 'Theme Name',
'ThemeURI' => 'Theme URI',
'Description' => 'Description',
'Author' => 'Author',
'AuthorURI' => 'Author URI',
'Version' => 'Version',
'Template' => 'Template',
'Status' => 'Status',
'Tags' => 'Tags',
'TextDomain' => 'Text Domain',
'DomainPath' => 'Domain Path',
);
/**
* Default themes.
*
* @static
* @access private
* @var array
*/
private static $default_themes = array(
'classic' => 'WordPress Classic',
'default' => 'WordPress Default',
'twentyten' => 'Twenty Ten',
'twentyeleven' => 'Twenty Eleven',
'twentytwelve' => 'Twenty Twelve',
'twentythirteen' => 'Twenty Thirteen',
);
/**
* Absolute path to the theme root, usually wp-content/themes
*
* @access private
* @var string
*/
private $theme_root;
/**
* Header data from the theme's style.css file.
*
* @access private
* @var array
*/
private $headers = array();
/**
* Header data from the theme's style.css file after being sanitized.
*
* @access private
* @var array
*/
private $headers_sanitized;
/**
* Header name from the theme's style.css after being translated.
*
* Cached due to sorting functions running over the translated name.
*/
private $name_translated;
/**
* Errors encountered when initializing the theme.
*
* @access private
* @var WP_Error
*/
private $errors;
/**
* The directory name of the theme's files, inside the theme root.
*
* In the case of a child theme, this is directory name of the child theme.
* Otherwise, 'stylesheet' is the same as 'template'.
*
* @access private
* @var string
*/
private $stylesheet;
/**
* The directory name of the theme's files, inside the theme root.
*
* In the case of a child theme, this is the directory name of the parent theme.
* Otherwise, 'template' is the same as 'stylesheet'.
*
* @access private
* @var string
*/
private $template;
/**
* A reference to the parent theme, in the case of a child theme.
*
* @access private
* @var WP_Theme
*/
private $parent;
/**
* URL to the theme root, usually an absolute URL to wp-content/themes
*
* @access private
* var string
*/
private $theme_root_uri;
/**
* Flag for whether the theme's textdomain is loaded.
*
* @access private
* @var bool
*/
private $textdomain_loaded;
/**
* Stores an md5 hash of the theme root, to function as the cache key.
*
* @access private
* @var string
*/
private $cache_hash;
/**
* Flag for whether the themes cache bucket should be persistently cached.
*
* Default is false. Can be set with the wp_cache_themes_persistently filter.
*
* @access private
* @var bool
*/
private static $persistently_cache;
/**
* Expiration time for the themes cache bucket.
*
* By default the bucket is not cached, so this value is useless.
*
* @access private
* @var bool
*/
private static $cache_expiration = 1800;
/**
* Constructor for WP_Theme.
*
* @param string $theme_dir Directory of the theme within the theme_root.
* @param string $theme_root Theme root.
* @param WP_Error|null $_child If this theme is a parent theme, the child may be passed for validation purposes.
*/
public function __construct( $theme_dir, $theme_root, $_child = null ) {
global $wp_theme_directories;
// Initialize caching on first run.
if ( ! isset( self::$persistently_cache ) ) {
self::$persistently_cache = apply_filters( 'wp_cache_themes_persistently', false, 'WP_Theme' );
if ( self::$persistently_cache ) {
wp_cache_add_global_groups( 'themes' );
if ( is_int( self::$persistently_cache ) )
self::$cache_expiration = self::$persistently_cache;
} else {
wp_cache_add_non_persistent_groups( 'themes' );
}
}
$this->theme_root = $theme_root;
$this->stylesheet = $theme_dir;
// Correct a situation where the theme is 'some-directory/some-theme' but 'some-directory' was passed in as part of the theme root instead.
if ( ! in_array( $theme_root, (array) $wp_theme_directories ) && in_array( dirname( $theme_root ), (array) $wp_theme_directories ) ) {
$this->stylesheet = basename( $this->theme_root ) . '/' . $this->stylesheet;
$this->theme_root = dirname( $theme_root );
}
$this->cache_hash = md5( $this->theme_root . '/' . $this->stylesheet );
$theme_file = $this->stylesheet . '/style.css';
$cache = $this->cache_get( 'theme' );
if ( is_array( $cache ) ) {
foreach ( array( 'errors', 'headers', 'template' ) as $key ) {
if ( isset( $cache[ $key ] ) )
$this->$key = $cache[ $key ];
}
if ( $this->errors )
return;
if ( isset( $cache['theme_root_template'] ) )
$theme_root_template = $cache['theme_root_template'];
} elseif ( ! file_exists( $this->theme_root . '/' . $theme_file ) ) {
$this->headers['Name'] = $this->stylesheet;
if ( ! file_exists( $this->theme_root . '/' . $this->stylesheet ) )
$this->errors = new WP_Error( 'theme_not_found', __( 'The theme directory does not exist.' ) );
else
$this->errors = new WP_Error( 'theme_no_stylesheet', __( 'Stylesheet is missing.' ) );
$this->template = $this->stylesheet;
$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
if ( ! file_exists( $this->theme_root ) ) // Don't cache this one.
$this->errors->add( 'theme_root_missing', __( 'ERROR: The themes directory is either empty or doesn’t exist. Please check your installation.' ) );
return;
} elseif ( ! is_readable( $this->theme_root . '/' . $theme_file ) ) {
$this->headers['Name'] = $this->stylesheet;
$this->errors = new WP_Error( 'theme_stylesheet_not_readable', __( 'Stylesheet is not readable.' ) );
$this->template = $this->stylesheet;
$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
return;
} else {
$this->headers = get_file_data( $this->theme_root . '/' . $theme_file, self::$file_headers, 'theme' );
// Default themes always trump their pretenders.
// Properly identify default themes that are inside a directory within wp-content/themes.
if ( $default_theme_slug = array_search( $this->headers['Name'], self::$default_themes ) ) {
if ( basename( $this->stylesheet ) != $default_theme_slug )
$this->headers['Name'] .= '/' . $this->stylesheet;
}
}
// (If template is set from cache [and there are no errors], we know it's good.)
if ( ! $this->template && ! ( $this->template = $this->headers['Template'] ) ) {
$this->template = $this->stylesheet;
if ( ! file_exists( $this->theme_root . '/' . $this->stylesheet . '/index.php' ) ) {
$this->errors = new WP_Error( 'theme_no_index', __( 'Template is missing.' ) );
$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
return;
}
}
// If we got our data from cache, we can assume that 'template' is pointing to the right place.
if ( ! is_array( $cache ) && $this->template != $this->stylesheet && ! file_exists( $this->theme_root . '/' . $this->template . '/index.php' ) ) {
// If we're in a directory of themes inside /themes, look for the parent nearby.
// wp-content/themes/directory-of-themes/*
$parent_dir = dirname( $this->stylesheet );
if ( '.' != $parent_dir && file_exists( $this->theme_root . '/' . $parent_dir . '/' . $this->template . '/index.php' ) ) {
$this->template = $parent_dir . '/' . $this->template;
} elseif ( ( $directories = search_theme_directories() ) && isset( $directories[ $this->template ] ) ) {
// Look for the template in the search_theme_directories() results, in case it is in another theme root.
// We don't look into directories of themes, just the theme root.
$theme_root_template = $directories[ $this->template ]['theme_root'];
} else {
// Parent theme is missing.
$this->errors = new WP_Error( 'theme_no_parent', sprintf( __( 'The parent theme is missing. Please install the "%s" parent theme.' ), $this->template ) );
$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
$this->parent = new WP_Theme( $this->template, $this->theme_root, $this );
return;
}
}
// Set the parent, if we're a child theme.
if ( $this->template != $this->stylesheet ) {
// If we are a parent, then there is a problem. Only two generations allowed! Cancel things out.
if ( is_a( $_child, 'WP_Theme' ) && $_child->template == $this->stylesheet ) {
$_child->parent = null;
$_child->errors = new WP_Error( 'theme_parent_invalid', sprintf( __( 'The "%s" theme is not a valid parent theme.' ), $_child->template ) );
$_child->cache_add( 'theme', array( 'headers' => $_child->headers, 'errors' => $_child->errors, 'stylesheet' => $_child->stylesheet, 'template' => $_child->template ) );
// The two themes actually reference each other with the Template header.
if ( $_child->stylesheet == $this->template ) {
$this->errors = new WP_Error( 'theme_parent_invalid', sprintf( __( 'The "%s" theme is not a valid parent theme.' ), $this->template ) );
$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
}
return;
}
// Set the parent. Pass the current instance so we can do the crazy checks above and assess errors.
$this->parent = new WP_Theme( $this->template, isset( $theme_root_template ) ? $theme_root_template : $this->theme_root, $this );
}
// We're good. If we didn't retrieve from cache, set it.
if ( ! is_array( $cache ) ) {
$cache = array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template );
// If the parent theme is in another root, we'll want to cache this. Avoids an entire branch of filesystem calls above.
if ( isset( $theme_root_template ) )
$cache['theme_root_template'] = $theme_root_template;
$this->cache_add( 'theme', $cache );
}
}
/**
* When converting the object to a string, the theme name is returned.
*
* @return string Theme name, ready for display (translated)
*/
public function __toString() {
return (string) $this->display('Name');
}
/**
* __isset() magic method for properties formerly returned by current_theme_info()
*/
public function __isset( $offset ) {
static $properties = array(
'name', 'title', 'version', 'parent_theme', 'template_dir', 'stylesheet_dir', 'template', 'stylesheet',
'screenshot', 'description', 'author', 'tags', 'theme_root', 'theme_root_uri',
);
return in_array( $offset, $properties );
}
/**
* __get() magic method for properties formerly returned by current_theme_info()
*/
public function __get( $offset ) {
switch ( $offset ) {
case 'name' :
case 'title' :
return $this->get('Name');
case 'version' :
return $this->get('Version');
case 'parent_theme' :
return $this->parent() ? $this->parent()->get('Name') : '';
case 'template_dir' :
return $this->get_template_directory();
case 'stylesheet_dir' :
return $this->get_stylesheet_directory();
case 'template' :
return $this->get_template();
case 'stylesheet' :
return $this->get_stylesheet();
case 'screenshot' :
return $this->get_screenshot( 'relative' );
// 'author' and 'description' did not previously return translated data.
case 'description' :
return $this->display('Description');
case 'author' :
return $this->display('Author');
case 'tags' :
return $this->get( 'Tags' );
case 'theme_root' :
return $this->get_theme_root();
case 'theme_root_uri' :
return $this->get_theme_root_uri();
// For cases where the array was converted to an object.
default :
return $this->offsetGet( $offset );
}
}
/**
* Method to implement ArrayAccess for keys formerly returned by get_themes()
*/
public function offsetSet( $offset, $value ) {}
/**
* Method to implement ArrayAccess for keys formerly returned by get_themes()
*/
public function offsetUnset( $offset ) {}
/**
* Method to implement ArrayAccess for keys formerly returned by get_themes()
*/
public function offsetExists( $offset ) {
static $keys = array(
'Name', 'Version', 'Status', 'Title', 'Author', 'Author Name', 'Author URI', 'Description',
'Template', 'Stylesheet', 'Template Files', 'Stylesheet Files', 'Template Dir', 'Stylesheet Dir',
'Screenshot', 'Tags', 'Theme Root', 'Theme Root URI', 'Parent Theme',
);
return in_array( $offset, $keys );
}
/**
* Method to implement ArrayAccess for keys formerly returned by get_themes().
*
* Author, Author Name, Author URI, and Description did not previously return
* translated data. We are doing so now as it is safe to do. However, as
* Name and Title could have been used as the key for get_themes(), both remain
* untranslated for back compatibility. This means that ['Name'] is not ideal,
* and care should be taken to use $theme->display('Name') to get a properly
* translated header.
*/
public function offsetGet( $offset ) {
switch ( $offset ) {
case 'Name' :
case 'Title' :
// See note above about using translated data. get() is not ideal.
// It is only for backwards compatibility. Use display().
return $this->get('Name');
case 'Author' :
return $this->display( 'Author');
case 'Author Name' :
return $this->display( 'Author', false);
case 'Author URI' :
return $this->display('AuthorURI');
case 'Description' :
return $this->display( 'Description');
case 'Version' :
case 'Status' :
return $this->get( $offset );
case 'Template' :
return $this->get_template();
case 'Stylesheet' :
return $this->get_stylesheet();
case 'Template Files' :
return $this->get_files( 'php', 1, true );
case 'Stylesheet Files' :
return $this->get_files( 'css', 0, false );
case 'Template Dir' :
return $this->get_template_directory();
case 'Stylesheet Dir' :
return $this->get_stylesheet_directory();
case 'Screenshot' :
return $this->get_screenshot( 'relative' );
case 'Tags' :
return $this->get('Tags');
case 'Theme Root' :
return $this->get_theme_root();
case 'Theme Root URI' :
return $this->get_theme_root_uri();
case 'Parent Theme' :
return $this->parent() ? $this->parent()->get('Name') : '';
default :
return null;
}
}
/**
* Returns errors property.
*
* @since 3.4.0
* @access public
*
* @return WP_Error|bool WP_Error if there are errors, or false.
*/
public function errors() {
return is_wp_error( $this->errors ) ? $this->errors : false;
}
/**
* Whether the theme exists.
*
* A theme with errors exists. A theme with the error of 'theme_not_found',
* meaning that the theme's directory was not found, does not exist.
*
* @since 3.4.0
* @access public
*
* @return bool Whether the theme exists.
*/
public function exists() {
return ! ( $this->errors() && in_array( 'theme_not_found', $this->errors()->get_error_codes() ) );
}
/**
* Returns reference to the parent theme.
*
* @since 3.4.0
* @access public
*
* @return WP_Theme|bool Parent theme, or false if the current theme is not a child theme.
*/
public function parent() {
return isset( $this->parent ) ? $this->parent : false;
}
/**
* Adds theme data to cache.
*
* Cache entries keyed by the theme and the type of data.
*
* @access private
* @since 3.4.0
*
* @param string $key Type of data to store (theme, screenshot, headers, page_templates)
* @param string $data Data to store
* @return bool Return value from wp_cache_add()
*/
private function cache_add( $key, $data ) {
return wp_cache_add( $key . '-' . $this->cache_hash, $data, 'themes', self::$cache_expiration );
}
/**
* Gets theme data from cache.
*
* Cache entries are keyed by the theme and the type of data.
*
* @access private
* @since 3.4.0
*
* @param string $key Type of data to retrieve (theme, screenshot, headers, page_templates)
* @return mixed Retrieved data
*/
private function cache_get( $key ) {
return wp_cache_get( $key . '-' . $this->cache_hash, 'themes' );
}
/**
* Clears the cache for the theme.
*
* @access public
* @since 3.4.0
*/
public function cache_delete() {
foreach ( array( 'theme', 'screenshot', 'headers', 'page_templates' ) as $key )
wp_cache_delete( $key . '-' . $this->cache_hash, 'themes' );
$this->template = $this->textdomain_loaded = $this->theme_root_uri = $this->parent = $this->errors = $this->headers_sanitized = $this->name_translated = null;
$this->headers = array();
$this->__construct( $this->stylesheet, $this->theme_root );
}
/**
* Get a raw, unformatted theme header.
*
* The header is sanitized, but is not translated, and is not marked up for display.
* To get a theme header for display, use the display() method.
*
* Use the get_template() method, not the 'Template' header, for finding the template.
* The 'Template' header is only good for what was written in the style.css, while
* get_template() takes into account where WordPress actually located the theme and
* whether it is actually valid.
*
* @access public
* @since 3.4.0
*
* @param string $header Theme header. Name, Description, Author, Version, ThemeURI, AuthorURI, Status, Tags.
* @return string String on success, false on failure.
*/
public function get( $header ) {
if ( ! isset( $this->headers[ $header ] ) )
return false;
if ( ! isset( $this->headers_sanitized ) ) {
$this->headers_sanitized = $this->cache_get( 'headers' );
if ( ! is_array( $this->headers_sanitized ) )
$this->headers_sanitized = array();
}
if ( isset( $this->headers_sanitized[ $header ] ) )
return $this->headers_sanitized[ $header ];
// If themes are a persistent group, sanitize everything and cache it. One cache add is better than many cache sets.
if ( self::$persistently_cache ) {
foreach ( array_keys( $this->headers ) as $_header )
$this->headers_sanitized[ $_header ] = $this->sanitize_header( $_header, $this->headers[ $_header ] );
$this->cache_add( 'headers', $this->headers_sanitized );
} else {
$this->headers_sanitized[ $header ] = $this->sanitize_header( $header, $this->headers[ $header ] );
}
return $this->headers_sanitized[ $header ];
}
/**
* Gets a theme header, formatted and translated for display.
*
* @access public
* @since 3.4.0
*
* @param string $header Theme header. Name, Description, Author, Version, ThemeURI, AuthorURI, Status, Tags.
* @param bool $markup Optional. Whether to mark up the header. Defaults to true.
* @param bool $translate Optional. Whether to translate the header. Defaults to true.
* @return string Processed header, false on failure.
*/
public function display( $header, $markup = true, $translate = true ) {
$value = $this->get( $header );
if ( $translate && ( empty( $value ) || ! $this->load_textdomain() ) )
$translate = false;
if ( $translate )
$value = $this->translate_header( $header, $value );
if ( $markup )
$value = $this->markup_header( $header, $value, $translate );
return $value;
}
/**
* Sanitize a theme header.
*
* @param string $header Theme header. Name, Description, Author, Version, ThemeURI, AuthorURI, Status, Tags.
* @param string $value Value to sanitize.
*/
private function sanitize_header( $header, $value ) {
switch ( $header ) {
case 'Status' :
if ( ! $value ) {
$value = 'publish';
break;
}
// Fall through otherwise.
case 'Name' :
static $header_tags = array(
'abbr' => array( 'title' => true ),
'acronym' => array( 'title' => true ),
'code' => true,
'em' => true,
'strong' => true,
);
$value = wp_kses( $value, $header_tags );
break;
case 'Author' :
// There shouldn't be anchor tags in Author, but some themes like to be challenging.
case 'Description' :
static $header_tags_with_a = array(
'a' => array( 'href' => true, 'title' => true ),
'abbr' => array( 'title' => true ),
'acronym' => array( 'title' => true ),
'code' => true,
'em' => true,
'strong' => true,
);
$value = wp_kses( $value, $header_tags_with_a );
break;
case 'ThemeURI' :
case 'AuthorURI' :
$value = esc_url_raw( $value );
break;
case 'Tags' :
$value = array_filter( array_map( 'trim', explode( ',', strip_tags( $value ) ) ) );
break;
}
return $value;
}
/**
* Mark up a theme header.
*
* @access private
* @since 3.4.0
*
* @param string $header Theme header. Name, Description, Author, Version, ThemeURI, AuthorURI, Status, Tags.
* @param string $value Value to mark up.
* @param string $translate Whether the header has been translated.
* @return string Value, marked up.
*/
private function markup_header( $header, $value, $translate ) {
switch ( $header ) {
case 'Name' :
if ( empty( $value ) )
$value = $this->get_stylesheet();
break;
case 'Description' :
$value = wptexturize( $value );
break;
case 'Author' :
if ( $this->get('AuthorURI') ) {
static $attr = null;
if ( ! isset( $attr ) )
$attr = esc_attr__( 'Visit author homepage' );
$value = sprintf( '<a href="%1$s" title="%2$s">%3$s</a>', $this->display( 'AuthorURI', true, $translate ), $attr, $value );
} elseif ( ! $value ) {
$value = __( 'Anonymous' );
}
break;
case 'Tags' :
static $comma = null;
if ( ! isset( $comma ) ) {
/* translators: used between list items, there is a space after the comma */
$comma = __( ', ' );
}
$value = implode( $comma, $value );
break;
case 'ThemeURI' :
case 'AuthorURI' :
$value = esc_url( $value );
break;
}
return $value;
}
/**
* Translate a theme header.
*
* @access private
* @since 3.4.0
*
* @param string $header Theme header. Name, Description, Author, Version, ThemeURI, AuthorURI, Status, Tags.
* @param string $value Value to translate.
* @return string Translated value.
*/
private function translate_header( $header, $value ) {
switch ( $header ) {
case 'Name' :
// Cached for sorting reasons.
if ( isset( $this->name_translated ) )
return $this->name_translated;
$this->name_translated = translate( $value, $this->get('TextDomain' ) );
return $this->name_translated;
case 'Tags' :
if ( empty( $value ) || ! function_exists( 'get_theme_feature_list' ) )
return $value;
static $tags_list;
if ( ! isset( $tags_list ) ) {
$tags_list = array();
$feature_list = get_theme_feature_list( false ); // No API
foreach ( $feature_list as $tags )
$tags_list += $tags;
}
foreach ( $value as &$tag ) {
if ( isset( $tags_list[ $tag ] ) )
$tag = $tags_list[ $tag ];
}
return $value;
break;
default :
$value = translate( $value, $this->get('TextDomain') );
}
return $value;
}
/**
* The directory name of the theme's "stylesheet" files, inside the theme root.
*
* In the case of a child theme, this is directory name of the child theme.
* Otherwise, get_stylesheet() is the same as get_template().
*
* @since 3.4.0
* @access public
*
* @return string Stylesheet
*/
public function get_stylesheet() {
return $this->stylesheet;
}
/**
* The directory name of the theme's "template" files, inside the theme root.
*
* In the case of a child theme, this is the directory name of the parent theme.
* Otherwise, the get_template() is the same as get_stylesheet().
*
* @since 3.4.0
* @access public
*
* @return string Template
*/
public function get_template() {
return $this->template;
}
/**
* Returns the absolute path to the directory of a theme's "stylesheet" files.
*
* In the case of a child theme, this is the absolute path to the directory
* of the child theme's files.
*
* @since 3.4.0
* @access public
*
* @return string Absolute path of the stylesheet directory.
*/
public function get_stylesheet_directory() {
if ( $this->errors() && in_array( 'theme_root_missing', $this->errors()->get_error_codes() ) )
return '';
return $this->theme_root . '/' . $this->stylesheet;
}
/**
* Returns the absolute path to the directory of a theme's "template" files.
*
* In the case of a child theme, this is the absolute path to the directory
* of the parent theme's files.
*
* @since 3.4.0
* @access public
*
* @return string Absolute path of the template directory.
*/
public function get_template_directory() {
if ( $this->parent() )
$theme_root = $this->parent()->theme_root;
else
$theme_root = $this->theme_root;
return $theme_root . '/' . $this->template;
}
/**
* Returns the URL to the directory of a theme's "stylesheet" files.
*
* In the case of a child theme, this is the URL to the directory of the
* child theme's files.
*
* @since 3.4.0
* @access public
*
* @return string URL to the stylesheet directory.
*/
public function get_stylesheet_directory_uri() {
return $this->get_theme_root_uri() . '/' . str_replace( '%2F', '/', rawurlencode( $this->stylesheet ) );
}
/**
* Returns the URL to the directory of a theme's "template" files.
*
* In the case of a child theme, this is the URL to the directory of the
* parent theme's files.
*
* @since 3.4.0
* @access public
*
* @return string URL to the template directory.
*/
public function get_template_directory_uri() {
if ( $this->parent() )
$theme_root_uri = $this->parent()->get_theme_root_uri();
else
$theme_root_uri = $this->get_theme_root_uri();
return $theme_root_uri . '/' . str_replace( '%2F', '/', rawurlencode( $this->template ) );
}
/**
* The absolute path to the directory of the theme root.
*
* This is typically the absolute path to wp-content/themes.
*
* @since 3.4.0
* @access public
*
* @return string Theme root.
*/
public function get_theme_root() {
return $this->theme_root;
}
/**
* Returns the URL to the directory of the theme root.
*
* This is typically the absolute URL to wp-content/themes. This forms the basis
* for all other URLs returned by WP_Theme, so we pass it to the public function
* get_theme_root_uri() and allow it to run the theme_root_uri filter.
*
* @uses get_theme_root_uri()
*
* @since 3.4.0
* @access public
*
* @return string Theme root URI.
*/
public function get_theme_root_uri() {
if ( ! isset( $this->theme_root_uri ) )
$this->theme_root_uri = get_theme_root_uri( $this->stylesheet, $this->theme_root );
return $this->theme_root_uri;
}
/**
* Returns the main screenshot file for the theme.
*
* The main screenshot is called screenshot.png. gif and jpg extensions are also allowed.
*
* Screenshots for a theme must be in the stylesheet directory. (In the case of child
* themes, parent theme screenshots are not inherited.)
*
* @since 3.4.0
* @access public
*
* @param string $uri Type of URL to return, either 'relative' or an absolute URI. Defaults to absolute URI.
* @return mixed Screenshot file. False if the theme does not have a screenshot.
*/
public function get_screenshot( $uri = 'uri' ) {
$screenshot = $this->cache_get( 'screenshot' );
if ( $screenshot ) {
if ( 'relative' == $uri )
return $screenshot;
return $this->get_stylesheet_directory_uri() . '/' . $screenshot;
} elseif ( 0 === $screenshot ) {
return false;
}
foreach ( array( 'png', 'gif', 'jpg', 'jpeg' ) as $ext ) {
if ( file_exists( $this->get_stylesheet_directory() . "/screenshot.$ext" ) ) {
$this->cache_add( 'screenshot', 'screenshot.' . $ext );
if ( 'relative' == $uri )
return 'screenshot.' . $ext;
return $this->get_stylesheet_directory_uri() . '/' . 'screenshot.' . $ext;
}
}
$this->cache_add( 'screenshot', 0 );
return false;
}
/**
* Return files in the theme's directory.
*
* @since 3.4.0
* @access public
*
* @param mixed $type Optional. Array of extensions to return. Defaults to all files (null).
* @param int $depth Optional. How deep to search for files. Defaults to a flat scan (0 depth). -1 depth is infinite.
* @param bool $search_parent Optional. Whether to return parent files. Defaults to false.
* @return array Array of files, keyed by the path to the file relative to the theme's directory, with the values
* being absolute paths.
*/
public function get_files( $type = null, $depth = 0, $search_parent = false ) {
$files = (array) self::scandir( $this->get_stylesheet_directory(), $type, $depth );
if ( $search_parent && $this->parent() )
$files += (array) self::scandir( $this->get_template_directory(), $type, $depth );
return $files;
}
/**
* Returns the theme's page templates.
*
* @since 3.4.0
* @access public
*
* @return array Array of page templates, keyed by filename, with the value of the translated header name.
*/
public function get_page_templates() {
// If you screw up your current theme and we invalidate your parent, most things still work. Let it slide.
if ( $this->errors() && $this->errors()->get_error_codes() !== array( 'theme_parent_invalid' ) )
return array();
$page_templates = $this->cache_get( 'page_templates' );
if ( ! is_array( $page_templates ) ) {
$page_templates = array();
$files = (array) $this->get_files( 'php', 1 );
foreach ( $files as $file => $full_path ) {
if ( ! preg_match( '|Template Name:(.*)$|mi', file_get_contents( $full_path ), $header ) )
continue;
$page_templates[ $file ] = _cleanup_header_comment( $header[1] );
}
$this->cache_add( 'page_templates', $page_templates );
}
if ( $this->load_textdomain() ) {
foreach ( $page_templates as &$page_template ) {
$page_template = $this->translate_header( 'Template Name', $page_template );
}
}
if ( $this->parent() )
$page_templates += $this->parent()->get_page_templates();
return $page_templates;
}
/**
* Scans a directory for files of a certain extension.
*
* @since 3.4.0
* @access private
*
* @param string $path Absolute path to search.
* @param mixed Array of extensions to find, string of a single extension, or null for all extensions.
* @param int $depth How deep to search for files. Optional, defaults to a flat scan (0 depth). -1 depth is infinite.
* @param string $relative_path The basename of the absolute path. Used to control the returned path
* for the found files, particularly when this function recurses to lower depths.
*/
private static function scandir( $path, $extensions = null, $depth = 0, $relative_path = '' ) {
if ( ! is_dir( $path ) )
return false;
if ( $extensions ) {
$extensions = (array) $extensions;
$_extensions = implode( '|', $extensions );
}
$relative_path = trailingslashit( $relative_path );
if ( '/' == $relative_path )
$relative_path = '';
$results = scandir( $path );
$files = array();
foreach ( $results as $result ) {
if ( '.' == $result[0] )
continue;
if ( is_dir( $path . '/' . $result ) ) {
if ( ! $depth || 'CVS' == $result )
continue;
$found = self::scandir( $path . '/' . $result, $extensions, $depth - 1 , $relative_path . $result );
$files = array_merge_recursive( $files, $found );
} elseif ( ! $extensions || preg_match( '~\.(' . $_extensions . ')$~', $result ) ) {
$files[ $relative_path . $result ] = $path . '/' . $result;
}
}
return $files;
}
/**