/blog/wp-includes/theme.php
PHP | 1676 lines | 858 code | 228 blank | 590 comment | 215 complexity | b171e25acc0692a04ac6f24bd2c40853 MD5 | raw file
Possible License(s): GPL-2.0, GPL-3.0, AGPL-1.0, LGPL-2.1
- <?php
- /**
- * Theme, template, and stylesheet functions.
- *
- * @package WordPress
- * @subpackage Theme
- */
- /**
- * Returns an array of WP_Theme objects based on the arguments.
- *
- * Despite advances over get_themes(), this function is quite expensive, and grows
- * linearly with additional themes. Stick to wp_get_theme() if possible.
- *
- * @since 3.4.0
- *
- * @param array $args The search arguments. Optional.
- * - errors mixed True to return themes with errors, false to return themes without errors, null
- * to return all themes. Defaults to false.
- * - allowed mixed (Multisite) True to return only allowed themes for a site. False to return only
- * disallowed themes for a site. 'site' to return only site-allowed themes. 'network'
- * to return only network-allowed themes. Null to return all themes. Defaults to null.
- * - blog_id int (Multisite) The blog ID used to calculate which themes are allowed. Defaults to 0,
- * synonymous for the current blog.
- * @return Array of WP_Theme objects.
- */
- function wp_get_themes( $args = array() ) {
- global $wp_theme_directories;
- $defaults = array( 'errors' => false, 'allowed' => null, 'blog_id' => 0 );
- $args = wp_parse_args( $args, $defaults );
- $theme_directories = search_theme_directories();
- if ( count( $wp_theme_directories ) > 1 ) {
- // Make sure the current theme wins out, in case search_theme_directories() picks the wrong
- // one in the case of a conflict. (Normally, last registered theme root wins.)
- $current_theme = get_stylesheet();
- if ( isset( $theme_directories[ $current_theme ] ) ) {
- $root_of_current_theme = get_raw_theme_root( $current_theme );
- if ( ! in_array( $root_of_current_theme, $wp_theme_directories ) )
- $root_of_current_theme = WP_CONTENT_DIR . $root_of_current_theme;
- $theme_directories[ $current_theme ]['theme_root'] = $root_of_current_theme;
- }
- }
- if ( empty( $theme_directories ) )
- return array();
- if ( is_multisite() && null !== $args['allowed'] ) {
- $allowed = $args['allowed'];
- if ( 'network' === $allowed )
- $theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed_on_network() );
- elseif ( 'site' === $allowed )
- $theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed_on_site( $args['blog_id'] ) );
- elseif ( $allowed )
- $theme_directories = array_intersect_key( $theme_directories, WP_Theme::get_allowed( $args['blog_id'] ) );
- else
- $theme_directories = array_diff_key( $theme_directories, WP_Theme::get_allowed( $args['blog_id'] ) );
- }
- $themes = array();
- static $_themes = array();
- foreach ( $theme_directories as $theme => $theme_root ) {
- if ( isset( $_themes[ $theme_root['theme_root'] . '/' . $theme ] ) )
- $themes[ $theme ] = $_themes[ $theme_root['theme_root'] . '/' . $theme ];
- else
- $themes[ $theme ] = $_themes[ $theme_root['theme_root'] . '/' . $theme ] = new WP_Theme( $theme, $theme_root['theme_root'] );
- }
- if ( null !== $args['errors'] ) {
- foreach ( $themes as $theme => $wp_theme ) {
- if ( $wp_theme->errors() != $args['errors'] )
- unset( $themes[ $theme ] );
- }
- }
- return $themes;
- }
- /**
- * Gets a WP_Theme object for a theme.
- *
- * @since 3.4.0
- *
- * @param string $stylesheet Directory name for the theme. Optional. Defaults to current theme.
- * @param string $theme_root Absolute path of the theme root to look in. Optional. If not specified, get_raw_theme_root()
- * is used to calculate the theme root for the $stylesheet provided (or current theme).
- * @return WP_Theme Theme object. Be sure to check the object's exists() method if you need to confirm the theme's existence.
- */
- function wp_get_theme( $stylesheet = null, $theme_root = null ) {
- global $wp_theme_directories;
- if ( empty( $stylesheet ) )
- $stylesheet = get_stylesheet();
- if ( empty( $theme_root ) ) {
- $theme_root = get_raw_theme_root( $stylesheet );
- if ( false === $theme_root )
- $theme_root = WP_CONTENT_DIR . '/themes';
- elseif ( ! in_array( $theme_root, (array) $wp_theme_directories ) )
- $theme_root = WP_CONTENT_DIR . $theme_root;
- }
- return new WP_Theme( $stylesheet, $theme_root );
- }
- /**
- * Whether a child theme is in use.
- *
- * @since 3.0.0
- *
- * @return bool true if a child theme is in use, false otherwise.
- **/
- function is_child_theme() {
- return ( TEMPLATEPATH !== STYLESHEETPATH );
- }
- /**
- * 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();
- $theme_root = get_theme_root( $stylesheet );
- $stylesheet_dir = "$theme_root/$stylesheet";
- return apply_filters( 'stylesheet_directory', $stylesheet_dir, $stylesheet, $theme_root );
- }
- /**
- * Retrieve stylesheet directory URI.
- *
- * @since 1.5.0
- *
- * @return string
- */
- function get_stylesheet_directory_uri() {
- $stylesheet = get_stylesheet();
- $theme_root_uri = get_theme_root_uri( $stylesheet );
- $stylesheet_dir_uri = "$theme_root_uri/$stylesheet";
- return apply_filters( 'stylesheet_directory_uri', $stylesheet_dir_uri, $stylesheet, $theme_root_uri );
- }
- /**
- * 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();
- $theme_root = get_theme_root( $template );
- $template_dir = "$theme_root/$template";
- return apply_filters( 'template_directory', $template_dir, $template, $theme_root );
- }
- /**
- * 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();
- $theme_root_uri = get_theme_root_uri( $template );
- $template_dir_uri = "$theme_root_uri/$template";
- return apply_filters( 'template_directory_uri', $template_dir_uri, $template, $theme_root_uri );
- }
- /**
- * Retrieve theme roots.
- *
- * @since 2.9.0
- *
- * @return array|string An array of theme roots keyed by template/stylesheet or a single theme root if all themes have the same root.
- */
- function get_theme_roots() {
- global $wp_theme_directories;
- if ( count($wp_theme_directories) <= 1 )
- return '/themes';
- $theme_roots = get_site_transient( 'theme_roots' );
- if ( false === $theme_roots ) {
- search_theme_directories( true ); // Regenerate the transient.
- $theme_roots = get_site_transient( 'theme_roots' );
- }
- return $theme_roots;
- }
- /**
- * Register a directory that contains themes.
- *
- * @since 2.9.0
- *
- * @param string $directory Either the full filesystem path to a theme folder or a folder within WP_CONTENT_DIR
- * @return bool
- */
- function register_theme_directory( $directory ) {
- global $wp_theme_directories;
- if ( ! file_exists( $directory ) ) {
- // Try prepending as the theme directory could be relative to the content directory
- $directory = WP_CONTENT_DIR . '/' . $directory;
- // If this directory does not exist, return and do not register
- if ( ! file_exists( $directory ) )
- return false;
- }
- $wp_theme_directories[] = $directory;
- return true;
- }
- /**
- * Search all registered theme directories for complete and valid themes.
- *
- * @since 2.9.0
- *
- * @param bool $force Optional. Whether to force a new directory scan. Defaults to false.
- * @return array Valid themes found
- */
- function search_theme_directories( $force = false ) {
- global $wp_theme_directories;
- if ( empty( $wp_theme_directories ) )
- return false;
- static $found_themes;
- if ( ! $force && isset( $found_themes ) )
- return $found_themes;
- $found_themes = array();
- $wp_theme_directories = (array) $wp_theme_directories;
- // Set up maybe-relative, maybe-absolute array of theme directories.
- // We always want to return absolute, but we need to cache relative
- // use in for get_theme_root().
- foreach ( $wp_theme_directories as $theme_root ) {
- if ( 0 === strpos( $theme_root, WP_CONTENT_DIR ) )
- $relative_theme_roots[ str_replace( WP_CONTENT_DIR, '', $theme_root ) ] = $theme_root;
- else
- $relative_theme_roots[ $theme_root ] = $theme_root;
- }
- if ( $cache_expiration = apply_filters( 'wp_cache_themes_persistently', false, 'search_theme_directories' ) ) {
- $cached_roots = get_site_transient( 'theme_roots' );
- if ( is_array( $cached_roots ) ) {
- foreach ( $cached_roots as $theme_dir => $theme_root ) {
- // A cached theme root is no longer around, so skip it.
- if ( ! isset( $relative_theme_roots[ $theme_root ] ) )
- continue;
- $found_themes[ $theme_dir ] = array(
- 'theme_file' => $theme_dir . '/style.css',
- 'theme_root' => $relative_theme_roots[ $theme_root ], // Convert relative to absolute.
- );
- }
- return $found_themes;
- }
- if ( ! is_int( $cache_expiration ) )
- $cache_expiration = 1800; // half hour
- } else {
- $cache_expiration = 1800; // half hour
- }
- /* Loop the registered theme directories and extract all themes */
- foreach ( $wp_theme_directories as $theme_root ) {
- // Start with directories in the root of the current theme directory.
- $dirs = @ scandir( $theme_root );
- if ( ! $dirs )
- return false;
- foreach ( $dirs as $dir ) {
- if ( ! is_dir( $theme_root . '/' . $dir ) || $dir[0] == '.' || $dir == 'CVS' )
- continue;
- if ( file_exists( $theme_root . '/' . $dir . '/style.css' ) ) {
- // wp-content/themes/a-single-theme
- // wp-content/themes is $theme_root, a-single-theme is $dir
- $found_themes[ $dir ] = array(
- 'theme_file' => $dir . '/style.css',
- 'theme_root' => $theme_root,
- );
- } else {
- $found_theme = false;
- // wp-content/themes/a-folder-of-themes/*
- // wp-content/themes is $theme_root, a-folder-of-themes is $dir, then themes are $sub_dirs
- $sub_dirs = @ scandir( $theme_root . '/' . $dir );
- if ( ! $sub_dirs )
- return false;
- foreach ( $sub_dirs as $sub_dir ) {
- if ( ! is_dir( $theme_root . '/' . $dir . '/' . $sub_dir ) || $dir[0] == '.' || $dir == 'CVS' )
- continue;
- if ( ! file_exists( $theme_root . '/' . $dir . '/' . $sub_dir . '/style.css' ) )
- continue;
- $found_themes[ $dir . '/' . $sub_dir ] = array(
- 'theme_file' => $dir . '/' . $sub_dir . '/style.css',
- 'theme_root' => $theme_root,
- );
- $found_theme = true;
- }
- // Never mind the above, it's just a theme missing a style.css.
- // Return it; WP_Theme will catch the error.
- if ( ! $found_theme )
- $found_themes[ $dir ] = array(
- 'theme_file' => $dir . '/style.css',
- 'theme_root' => $theme_root,
- );
- }
- }
- }
- asort( $found_themes );
- $theme_roots = array();
- $relative_theme_roots = array_flip( $relative_theme_roots );
- foreach ( $found_themes as $theme_dir => $theme_data ) {
- $theme_roots[ $theme_dir ] = $relative_theme_roots[ $theme_data['theme_root'] ]; // Convert absolute to relative.
- }
- if ( $theme_roots != get_site_transient( 'theme_roots' ) )
- set_site_transient( 'theme_roots', $theme_roots, $cache_expiration );
- return $found_themes;
- }
- /**
- * Retrieve path to themes directory.
- *
- * Does not have trailing slash.
- *
- * @since 1.5.0
- * @uses apply_filters() Calls 'theme_root' filter on path.
- *
- * @param string $stylesheet_or_template The stylesheet or template name of the theme
- * @return string Theme path.
- */
- function get_theme_root( $stylesheet_or_template = false ) {
- global $wp_theme_directories;
- if ( $stylesheet_or_template && $theme_root = get_raw_theme_root( $stylesheet_or_template ) ) {
- // Always prepend WP_CONTENT_DIR unless the root currently registered as a theme directory.
- // This gives relative theme roots the benefit of the doubt when things go haywire.
- if ( ! in_array( $theme_root, (array) $wp_theme_directories ) )
- $theme_root = WP_CONTENT_DIR . $theme_root;
- } else {
- $theme_root = WP_CONTENT_DIR . '/themes';
- }
- return apply_filters( 'theme_root', $theme_root );
- }
- /**
- * Retrieve URI for themes directory.
- *
- * Does not have trailing slash.
- *
- * @since 1.5.0
- *
- * @param string $stylesheet_or_template Optional. The stylesheet or template name of the theme.
- * Default is to leverage the main theme root.
- * @param string $theme_root Optional. The theme root for which calculations will be based, preventing
- * the need for a get_raw_theme_root() call.
- * @return string Themes URI.
- */
- function get_theme_root_uri( $stylesheet_or_template = false, $theme_root = false ) {
- global $wp_theme_directories;
- if ( $stylesheet_or_template && ! $theme_root )
- $theme_root = get_raw_theme_root( $stylesheet_or_template );
- if ( $stylesheet_or_template && $theme_root ) {
- if ( in_array( $theme_root, (array) $wp_theme_directories ) ) {
- // Absolute path. Make an educated guess. YMMV -- but note the filter below.
- if ( 0 === strpos( $theme_root, WP_CONTENT_DIR ) )
- $theme_root_uri = content_url( str_replace( WP_CONTENT_DIR, '', $theme_root ) );
- elseif ( 0 === strpos( $theme_root, ABSPATH ) )
- $theme_root_uri = site_url( str_replace( ABSPATH, '', $theme_root ) );
- elseif ( 0 === strpos( $theme_root, WP_PLUGIN_DIR ) || 0 === strpos( $theme_root, WPMU_PLUGIN_DIR ) )
- $theme_root_uri = plugins_url( basename( $theme_root ), $theme_root );
- else
- $theme_root_uri = $theme_root;
- } else {
- $theme_root_uri = content_url( $theme_root );
- }
- } else {
- $theme_root_uri = content_url( 'themes' );
- }
- return apply_filters( 'theme_root_uri', $theme_root_uri, get_option('siteurl'), $stylesheet_or_template );
- }
- /**
- * Get the raw theme root relative to the content directory with no filters applied.
- *
- * @since 3.1.0
- *
- * @param string $stylesheet_or_template The stylesheet or template name of the theme
- * @param bool $skip_cache Optional. Whether to skip the cache. Defaults to false, meaning the cache is used.
- * @return string Theme root
- */
- function get_raw_theme_root( $stylesheet_or_template, $skip_cache = false ) {
- global $wp_theme_directories;
- if ( count($wp_theme_directories) <= 1 )
- return '/themes';
- $theme_root = false;
- // If requesting the root for the current theme, consult options to avoid calling get_theme_roots()
- if ( ! $skip_cache ) {
- if ( get_option('stylesheet') == $stylesheet_or_template )
- $theme_root = get_option('stylesheet_root');
- elseif ( get_option('template') == $stylesheet_or_template )
- $theme_root = get_option('template_root');
- }
- if ( empty($theme_root) ) {
- $theme_roots = get_theme_roots();
- if ( !empty($theme_roots[$stylesheet_or_template]) )
- $theme_root = $theme_roots[$stylesheet_or_template];
- }
- return $theme_root;
- }
- /**
- * 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="' . $stylesheet . '" type="text/css" media="screen" />';
- }
- /**
- * Start preview theme output buffer.
- *
- * Will only preform task if the user has permissions and template and preview
- * query variables exist.
- *
- * @since 2.6.0
- */
- function preview_theme() {
- if ( ! (isset($_GET['template']) && isset($_GET['preview'])) )
- return;
- if ( !current_user_can( 'switch_themes' ) )
- return;
- // Admin Thickbox requests
- if ( isset( $_GET['preview_iframe'] ) )
- show_admin_bar( false );
- $_GET['template'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['template']);
- if ( validate_file($_GET['template']) )
- return;
- add_filter( 'template', '_preview_theme_template_filter' );
- if ( isset($_GET['stylesheet']) ) {
- $_GET['stylesheet'] = preg_replace('|[^a-z0-9_./-]|i', '', $_GET['stylesheet']);
- if ( validate_file($_GET['stylesheet']) )
- return;
- add_filter( 'stylesheet', '_preview_theme_stylesheet_filter' );
- }
- // Prevent theme mods to current theme being used on theme being previewed
- add_filter( 'pre_option_theme_mods_' . get_option( 'stylesheet' ), '__return_empty_array' );
- ob_start( 'preview_theme_ob_filter' );
- }
- add_action('setup_theme', 'preview_theme');
- /**
- * Private function to modify the current template when previewing a theme
- *
- * @since 2.9.0
- * @access private
- *
- * @return string
- */
- function _preview_theme_template_filter() {
- return isset($_GET['template']) ? $_GET['template'] : '';
- }
- /**
- * Private function to modify the current stylesheet when previewing a theme
- *
- * @since 2.9.0
- * @access private
- *
- * @return string
- */
- function _preview_theme_stylesheet_filter() {
- return isset($_GET['stylesheet']) ? $_GET['stylesheet'] : '';
- }
- /**
- * Callback function for ob_start() to capture all links in the theme.
- *
- * @since 2.6.0
- * @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 2.6.0
- * @access private
- *
- * @param array $matches
- * @return string
- */
- function preview_theme_ob_filter_callback( $matches ) {
- if ( strpos($matches[4], 'onclick') !== false )
- $matches[4] = preg_replace('#onclick=([\'"]).*?(?<!\\\)\\1#i', '', $matches[4]); //Strip out any onclicks from rest of <a>. (?<!\\\) means to ignore the '" if its escaped by \ to prevent breaking mid-attribute.
- if (
- ( false !== strpos($matches[3], '/wp-admin/') )
- ||
- ( false !== strpos( $matches[3], '://' ) && 0 !== strpos( $matches[3], home_url() ) )
- ||
- ( false !== strpos($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'], 'preview_iframe' => 1 ), $matches[3] );
- if ( 0 === strpos($link, 'preview=1') )
- $link = "?$link";
- return $matches[1] . esc_attr( $link ) . $matches[4];
- }
- /**
- * Switches current theme to new template and stylesheet names.
- *
- * @since 2.5.0
- * @uses do_action() Calls 'switch_theme' action, passing the new theme.
- *
- * @param string $template Template name
- * @param string $stylesheet Stylesheet name.
- */
- function switch_theme( $template, $stylesheet ) {
- global $wp_theme_directories, $sidebars_widgets;
- if ( is_array( $sidebars_widgets ) )
- set_theme_mod( 'sidebars_widgets', array( 'time' => time(), 'data' => $sidebars_widgets ) );
- $old_theme = wp_get_theme();
- $new_theme = wp_get_theme( $stylesheet );
- $new_name = $new_theme->get('Name');
- update_option( 'template', $template );
- update_option( 'stylesheet', $stylesheet );
- if ( count( $wp_theme_directories ) > 1 ) {
- update_option( 'template_root', get_raw_theme_root( $template, true ) );
- update_option( 'stylesheet_root', get_raw_theme_root( $stylesheet, true ) );
- }
- update_option( 'current_theme', $new_name );
- if ( is_admin() && false === get_option( 'theme_mods_' . $stylesheet ) ) {
- $default_theme_mods = (array) get_option( 'mods_' . $new_name );
- add_option( "theme_mods_$stylesheet", $default_theme_mods );
- }
- update_option( 'theme_switched', $old_theme->get_stylesheet() );
- do_action( 'switch_theme', $new_name, $new_theme );
- }
- /**
- * Checks that current theme files 'index.php' and 'style.css' exists.
- *
- * Does not check the default theme, which is the fallback and should always exist.
- * Will switch theme to the fallback theme if current theme does not validate.
- * You can use the 'validate_current_theme' filter to return false to
- * disable this functionality.
- *
- * @since 1.5.0
- * @see WP_DEFAULT_THEME
- *
- * @return bool
- */
- function validate_current_theme() {
- // Don't validate during an install/upgrade.
- if ( defined('WP_INSTALLING') || !apply_filters( 'validate_current_theme', true ) )
- return true;
- if ( get_template() != WP_DEFAULT_THEME && !file_exists(get_template_directory() . '/index.php') ) {
- switch_theme( WP_DEFAULT_THEME, WP_DEFAULT_THEME );
- return false;
- }
- if ( get_stylesheet() != WP_DEFAULT_THEME && !file_exists(get_template_directory() . '/style.css') ) {
- switch_theme( WP_DEFAULT_THEME, WP_DEFAULT_THEME );
- return false;
- }
- if ( is_child_theme() && ! file_exists( get_stylesheet_directory() . '/style.css' ) ) {
- switch_theme( WP_DEFAULT_THEME, WP_DEFAULT_THEME );
- return false;
- }
- return true;
- }
- /**
- * Retrieve all theme modifications.
- *
- * @since 3.1.0
- *
- * @return array Theme modifications.
- */
- function get_theme_mods() {
- $theme_slug = get_option( 'stylesheet' );
- if ( false === ( $mods = get_option( "theme_mods_$theme_slug" ) ) ) {
- $theme_name = get_option( 'current_theme' );
- if ( false === $theme_name )
- $theme_name = wp_get_theme()->get('Name');
- $mods = get_option( "mods_$theme_name" ); // Deprecated location.
- if ( is_admin() && false !== $mods ) {
- update_option( "theme_mods_$theme_slug", $mods );
- delete_option( "mods_$theme_name" );
- }
- }
- return $mods;
- }
- /**
- * 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 ) {
- $mods = get_theme_mods();
- if ( isset( $mods[ $name ] ) )
- return apply_filters( "theme_mod_$name", $mods[ $name ] );
- if ( is_string( $default ) )
- $default = sprintf( $default, get_template_directory_uri(), get_stylesheet_directory_uri() );
- return apply_filters( "theme_mod_$name", $default );
- }
- /**
- * 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 ) {
- $mods = get_theme_mods();
- $mods[ $name ] = $value;
- $theme = get_option( 'stylesheet' );
- update_option( "theme_mods_$theme", $mods );
- }
- /**
- * 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 ) {
- $mods = get_theme_mods();
- if ( ! isset( $mods[ $name ] ) )
- return;
- unset( $mods[ $name ] );
- if ( empty( $mods ) )
- return remove_theme_mods();
- $theme = get_option( 'stylesheet' );
- update_option( "theme_mods_$theme", $mods );
- }
- /**
- * Remove theme modifications option for current theme.
- *
- * @since 2.1.0
- */
- function remove_theme_mods() {
- delete_option( 'theme_mods_' . get_option( 'stylesheet' ) );
- // Old style.
- $theme_name = get_option( 'current_theme' );
- if ( false === $theme_name )
- $theme_name = wp_get_theme()->get('Name');
- delete_option( 'mods_' . $theme_name );
- }
- /**
- * Retrieve text color for custom header.
- *
- * @since 2.1.0
- *
- * @return string
- */
- function get_header_textcolor() {
- return get_theme_mod('header_textcolor', get_theme_support( 'custom-header', 'default-text-color' ) );
- }
- /**
- * Display text color for custom header.
- *
- * @since 2.1.0
- */
- function header_textcolor() {
- echo get_header_textcolor();
- }
- /**
- * Whether to display the header text.
- *
- * @since 3.4.0
- *
- * @return bool
- */
- function display_header_text() {
- if ( ! current_theme_supports( 'custom-header', 'header-text' ) )
- return false;
- $text_color = get_theme_mod( 'header_textcolor', get_theme_support( 'custom-header', 'default-text-color' ) );
- return 'blank' != $text_color;
- }
- /**
- * Retrieve header image for custom header.
- *
- * @since 2.1.0
- *
- * @return string
- */
- function get_header_image() {
- $url = get_theme_mod( 'header_image', get_theme_support( 'custom-header', 'default-image' ) );
- if ( 'remove-header' == $url )
- return false;
- if ( is_random_header_image() )
- $url = get_random_header_image();
- if ( is_ssl() )
- $url = str_replace( 'http://', 'https://', $url );
- else
- $url = str_replace( 'https://', 'http://', $url );
- return esc_url_raw( $url );
- }
- /**
- * Get random header image data from registered images in theme.
- *
- * @since 3.4.0
- *
- * @access private
- *
- * @return string Path to header image
- */
- function _get_random_header_data() {
- static $_wp_random_header;
- if ( empty( $_wp_random_header ) ) {
- global $_wp_default_headers;
- $header_image_mod = get_theme_mod( 'header_image', '' );
- $headers = array();
- if ( 'random-uploaded-image' == $header_image_mod )
- $headers = get_uploaded_header_images();
- elseif ( ! empty( $_wp_default_headers ) ) {
- if ( 'random-default-image' == $header_image_mod ) {
- $headers = $_wp_default_headers;
- } else {
- if ( current_theme_supports( 'custom-header', 'random-default' ) )
- $headers = $_wp_default_headers;
- }
- }
- if ( empty( $headers ) )
- return new stdClass;
- $_wp_random_header = (object) $headers[ array_rand( $headers ) ];
- $_wp_random_header->url = sprintf( $_wp_random_header->url, get_template_directory_uri(), get_stylesheet_directory_uri() );
- $_wp_random_header->thumbnail_url = sprintf( $_wp_random_header->thumbnail_url, get_template_directory_uri(), get_stylesheet_directory_uri() );
- }
- return $_wp_random_header;
- }
- /**
- * Get random header image url from registered images in theme.
- *
- * @since 3.2.0
- *
- * @return string Path to header image
- */
- function get_random_header_image() {
- $random_image = _get_random_header_data();
- if ( empty( $random_image->url ) )
- return '';
- return $random_image->url;
- }
- /**
- * Check if random header image is in use.
- *
- * Always true if user expressly chooses the option in Appearance > Header.
- * Also true if theme has multiple header images registered, no specific header image
- * is chosen, and theme turns on random headers with add_theme_support().
- *
- * @since 3.2.0
- *
- * @param string $type The random pool to use. any|default|uploaded
- * @return boolean
- */
- function is_random_header_image( $type = 'any' ) {
- $header_image_mod = get_theme_mod( 'header_image', get_theme_support( 'custom-header', 'default-image' ) );
- if ( 'any' == $type ) {
- if ( 'random-default-image' == $header_image_mod || 'random-uploaded-image' == $header_image_mod || ( '' != get_random_header_image() && empty( $header_image_mod ) ) )
- return true;
- } else {
- if ( "random-$type-image" == $header_image_mod )
- return true;
- elseif ( 'default' == $type && empty( $header_image_mod ) && '' != get_random_header_image() )
- return true;
- }
- return false;
- }
- /**
- * Display header image path.
- *
- * @since 2.1.0
- */
- function header_image() {
- echo get_header_image();
- }
- /**
- * Get the header images uploaded for the current theme.
- *
- * @since 3.2.0
- *
- * @return array
- */
- function get_uploaded_header_images() {
- $header_images = array();
- // @todo caching
- $headers = get_posts( array( 'post_type' => 'attachment', 'meta_key' => '_wp_attachment_is_custom_header', 'meta_value' => get_option('stylesheet'), 'orderby' => 'none', 'nopaging' => true ) );
- if ( empty( $headers ) )
- return array();
- foreach ( (array) $headers as $header ) {
- $url = esc_url_raw( $header->guid );
- $header_data = wp_get_attachment_metadata( $header->ID );
- $header_index = basename($url);
- $header_images[$header_index] = array();
- $header_images[$header_index]['attachment_id'] = $header->ID;
- $header_images[$header_index]['url'] = $url;
- $header_images[$header_index]['thumbnail_url'] = $url;
- $header_images[$header_index]['width'] = $header_data['width'];
- $header_images[$header_index]['height'] = $header_data['height'];
- }
- return $header_images;
- }
- /**
- * Get the header image data.
- *
- * @since 3.4.0
- *
- * @return object
- */
- function get_custom_header() {
- $data = is_random_header_image()? _get_random_header_data() : get_theme_mod( 'header_image_data' );
- $default = array(
- 'url' => '',
- 'thumbnail_url' => '',
- 'width' => get_theme_support( 'custom-header', 'width' ),
- 'height' => get_theme_support( 'custom-header', 'height' ),
- );
- return (object) wp_parse_args( $data, $default );
- }
- /**
- * Register a selection of default headers to be displayed by the custom header admin UI.
- *
- * @since 3.0.0
- *
- * @param array $headers Array of headers keyed by a string id. The ids point to arrays containing 'url', 'thumbnail_url', and 'description' keys.
- */
- function register_default_headers( $headers ) {
- global $_wp_default_headers;
- $_wp_default_headers = array_merge( (array) $_wp_default_headers, (array) $headers );
- }
- /**
- * Unregister default headers.
- *
- * This function must be called after register_default_headers() has already added the
- * header you want to remove.
- *
- * @see register_default_headers()
- * @since 3.0.0
- *
- * @param string|array $header The header string id (key of array) to remove, or an array thereof.
- * @return True on success, false on failure.
- */
- function unregister_default_headers( $header ) {
- global $_wp_default_headers;
- if ( is_array( $header ) ) {
- array_map( 'unregister_default_headers', $header );
- } elseif ( isset( $_wp_default_headers[ $header ] ) ) {
- unset( $_wp_default_headers[ $header ] );
- return true;
- } else {
- return false;
- }
- }
- /**
- * Retrieve background image for custom background.
- *
- * @since 3.0.0
- *
- * @return string
- */
- function get_background_image() {
- return get_theme_mod('background_image', get_theme_support( 'custom-background', 'default-image' ) );
- }
- /**
- * Display background image path.
- *
- * @since 3.0.0
- */
- function background_image() {
- echo get_background_image();
- }
- /**
- * Retrieve value for custom background color.
- *
- * @since 3.0.0
- *
- * @return string
- */
- function get_background_color() {
- return get_theme_mod('background_color', get_theme_support( 'custom-background', 'default-color' ) );
- }
- /**
- * Display background color value.
- *
- * @since 3.0.0
- */
- function background_color() {
- echo get_background_color();
- }
- /**
- * Default custom background callback.
- *
- * @since 3.0.0
- * @access protected
- */
- function _custom_background_cb() {
- // $background is the saved custom image, or the default image.
- $background = get_background_image();
- // $color is the saved custom color.
- // A default has to be specified in style.css. It will not be printed here.
- $color = get_theme_mod( 'background_color' );
- if ( ! $background && ! $color )
- return;
- $style = $color ? "background-color: #$color;" : '';
- if ( $background ) {
- $image = " background-image: url('$background');";
- $repeat = get_theme_mod( 'background_repeat', 'repeat' );
- if ( ! in_array( $repeat, array( 'no-repeat', 'repeat-x', 'repeat-y', 'repeat' ) ) )
- $repeat = 'repeat';
- $repeat = " background-repeat: $repeat;";
- $position = get_theme_mod( 'background_position_x', 'left' );
- if ( ! in_array( $position, array( 'center', 'right', 'left' ) ) )
- $position = 'left';
- $position = " background-position: top $position;";
- $attachment = get_theme_mod( 'background_attachment', 'scroll' );
- if ( ! in_array( $attachment, array( 'fixed', 'scroll' ) ) )
- $attachment = 'scroll';
- $attachment = " background-attachment: $attachment;";
- $style .= $image . $repeat . $position . $attachment;
- }
- ?>
- <style type="text/css" id="custom-background-css">
- body.custom-background { <?php echo trim( $style ); ?> }
- </style>
- <?php
- }
- /**
- * Add callback for custom TinyMCE editor stylesheets.
- *
- * The parameter $stylesheet is the name of the stylesheet, relative to
- * the theme root. It also accepts an array of stylesheets.
- * It is optional and defaults to 'editor-style.css'.
- *
- * This function automatically adds another stylesheet with -rtl prefix, e.g. editor-style-rtl.css.
- * If that file doesn't exist, it is removed before adding the stylesheet(s) to TinyMCE.
- * If an array of stylesheets is passed to add_editor_style(),
- * RTL is only added for the first stylesheet.
- *
- * Since version 3.4 the TinyMCE body has .rtl CSS class.
- * It is a better option to use that class and add any RTL styles to the main stylesheet.
- *
- * @since 3.0.0
- *
- * @param mixed $stylesheet Optional. Stylesheet name or array thereof, relative to theme root.
- * Defaults to 'editor-style.css'
- */
- function add_editor_style( $stylesheet = 'editor-style.css' ) {
- add_theme_support( 'editor-style' );
- if ( ! is_admin() )
- return;
- global $editor_styles;
- $editor_styles = (array) $editor_styles;
- $stylesheet = (array) $stylesheet;
- if ( is_rtl() ) {
- $rtl_stylesheet = str_replace('.css', '-rtl.css', $stylesheet[0]);
- $stylesheet[] = $rtl_stylesheet;
- }
- $editor_styles = array_merge( $editor_styles, $stylesheet );
- }
- /**
- * Removes all visual editor stylesheets.
- *
- * @since 3.1.0
- *
- * @return bool True on success, false if there were no stylesheets to remove.
- */
- function remove_editor_styles() {
- if ( ! current_theme_supports( 'editor-style' ) )
- return false;
- _remove_theme_support( 'editor-style' );
- if ( is_admin() )
- $GLOBALS['editor_styles'] = array();
- return true;
- }
- /**
- * Allows a theme to register its support of a certain feature
- *
- * Must be called in the theme's functions.php file to work.
- * If attached to a hook, it must be after_setup_theme.
- * The init hook may be too late for some features.
- *
- * @since 2.9.0
- * @param string $feature the feature being added
- */
- function add_theme_support( $feature ) {
- global $_wp_theme_features;
- if ( func_num_args() == 1 )
- $args = true;
- else
- $args = array_slice( func_get_args(), 1 );
- switch ( $feature ) {
- case 'post-formats' :
- if ( is_array( $args[0] ) )
- $args[0] = array_intersect( $args[0], array_keys( get_post_format_slugs() ) );
- break;
- case 'custom-header-uploads' :
- return add_theme_support( 'custom-header', array( 'uploads' => true ) );
- break;
- case 'custom-header' :
- if ( ! is_array( $args ) )
- $args = array( 0 => array() );
- $defaults = array(
- 'default-image' => '',
- 'random-default' => false,
- 'width' => 0,
- 'height' => 0,
- 'flex-height' => false,
- 'flex-width' => false,
- 'default-text-color' => '',
- 'header-text' => true,
- 'uploads' => true,
- 'wp-head-callback' => '',
- 'admin-head-callback' => '',
- 'admin-preview-callback' => '',
- );
- $jit = isset( $args[0]['__jit'] );
- unset( $args[0]['__jit'] );
- // Merge in data from previous add_theme_support() calls.
- // The first value registered wins. (A child theme is set up first.)
- if ( isset( $_wp_theme_features['custom-header'] ) )
- $args[0] = wp_parse_args( $_wp_theme_features['custom-header'][0], $args[0] );
- // Load in the defaults at the end, as we need to insure first one wins.
- // This will cause all constants to be defined, as each arg will then be set to the default.
- if ( $jit )
- $args[0] = wp_parse_args( $args[0], $defaults );
- // If a constant was defined, use that value. Otherwise, define the constant to ensure
- // the constant is always accurate (and is not defined later, overriding our value).
- // As stated above, the first value wins.
- // Once we get to wp_loaded (just-in-time), define any constants we haven't already.
- // Constants are lame. Don't reference them. This is just for backwards compatibility.
- if ( defined( 'NO_HEADER_TEXT' ) )
- $args[0]['header-text'] = ! NO_HEADER_TEXT;
- elseif ( isset( $args[0]['header-text'] ) )
- define( 'NO_HEADER_TEXT', empty( $args[0]['header-text'] ) );
- if ( defined( 'HEADER_IMAGE_WIDTH' ) )
- $args[0]['width'] = (int) HEADER_IMAGE_WIDTH;
- elseif ( isset( $args[0]['width'] ) )
- define( 'HEADER_IMAGE_WIDTH', (int) $args[0]['width'] );
- if ( defined( 'HEADER_IMAGE_HEIGHT' ) )
- $args[0]['height'] = (int) HEADER_IMAGE_HEIGHT;
- elseif ( isset( $args[0]['height'] ) )
- define( 'HEADER_IMAGE_HEIGHT', (int) $args[0]['height'] );
- if ( defined( 'HEADER_TEXTCOLOR' ) )
- $args[0]['default-text-color'] = HEADER_TEXTCOLOR;
- elseif ( isset( $args[0]['default-text-color'] ) )
- define( 'HEADER_TEXTCOLOR', $args[0]['default-text-color'] );
- if ( defined( 'HEADER_IMAGE' ) )
- $args[0]['default-image'] = HEADER_IMAGE;
- elseif ( isset( $args[0]['default-image'] ) )
- define( 'HEADER_IMAGE', $args[0]['default-image'] );
- if ( $jit && ! empty( $args[0]['default-image'] ) )
- $args[0]['random-default'] = false;
- // If headers are supported, and we still don't have a defined width or height,
- // we have implicit flex sizes.
- if ( $jit ) {
- if ( empty( $args[0]['width'] ) && empty( $args[0]['flex-width'] ) )
- $args[0]['flex-width'] = true;
- if ( empty( $args[0]['height'] ) && empty( $args[0]['flex-height'] ) )
- $args[0]['flex-height'] = true;
- }
- break;
- case 'custom-background' :
- if ( ! is_array( $args ) )
- $args = array( 0 => array() );
- $defaults = array(
- 'default-image' => '',
- 'default-color' => '',
- 'wp-head-callback' => '_custom_background_cb',
- 'admin-head-callback' => '',
- 'admin-preview-callback' => '',
- );
- $jit = isset( $args[0]['__jit'] );
- unset( $args[0]['__jit'] );
- // Merge in data from previous add_theme_support() calls. The first value registered wins.
- if ( isset( $_wp_theme_features['custom-background'] ) )
- $args[0] = wp_parse_args( $_wp_theme_features['custom-background'][0], $args[0] );
- if ( $jit )
- $args[0] = wp_parse_args( $args[0], $defaults );
- if ( defined( 'BACKGROUND_COLOR' ) )
- $args[0]['default-color'] = BACKGROUND_COLOR;
- elseif ( isset( $args[0]['default-color'] ) || $jit )
- define( 'BACKGROUND_COLOR', $args[0]['default-color'] );
- if ( defined( 'BACKGROUND_IMAGE' ) )
- $args[0]['default-image'] = BACKGROUND_IMAGE;
- elseif ( isset( $args[0]['default-image'] ) || $jit )
- define( 'BACKGROUND_IMAGE', $args[0]['default-image'] );
- break;
- }
- $_wp_theme_features[ $feature ] = $args;
- }
- /**
- * Registers the internal custom header and background routines.
- *
- * @since 3.4.0
- * @access private
- */
- function _custom_header_background_just_in_time() {
- global $custom_image_header, $custom_background;
- if ( current_theme_supports( 'custom-header' ) ) {
- // In case any constants were defined after an add_custom_image_header() call, re-run.
- add_theme_support( 'custom-header', array( '__jit' => true ) );
- $args = get_theme_support( 'custom-header' );
- if ( $args[0]['wp-head-callback'] )
- add_action( 'wp_head', $args[0]['wp-head-callback'] );
- if ( is_admin() ) {
- require_once( ABSPATH . 'wp-admin/custom-header.php' );
- $custom_image_header = new Custom_Image_Header( $args[0]['admin-head-callback'], $args[0]['admin-preview-callback'] );
- }
- }
- if ( current_theme_supports( 'custom-background' ) ) {
- // In case any constants were defined after an add_custom_background() call, re-run.
- add_theme_support( 'custom-background', array( '__jit' => true ) );
- $args = get_theme_support( 'custom-background' );
- add_action( 'wp_head', $args[0]['wp-head-callback'] );
- if ( is_admin() ) {
- require_once( ABSPATH . 'wp-admin/custom-background.php' );
- $custom_background = new Custom_Background( $args[0]['admin-head-callback'], $args[0]['admin-preview-callback'] );
- }
- }
- }
- add_action( 'wp_loaded', '_custom_header_background_just_in_time' );
- /**
- * Gets the theme support arguments passed when registering that support
- *
- * @since 3.1
- * @param string $feature the feature to check
- * @return array The array of extra arguments
- */
- function get_theme_support( $feature ) {
- global $_wp_theme_features;
- if ( ! isset( $_wp_theme_features[ $feature ] ) )
- return false;
- if ( func_num_args() <= 1 )
- return $_wp_theme_features[ $feature ];
- $args = array_slice( func_get_args(), 1 );
- switch ( $feature ) {
- case 'custom-header' :
- case 'custom-background' :
- if ( isset( $_wp_theme_features[ $feature ][0][ $args[0] ] ) )
- return $_wp_theme_features[ $feature ][0][ $args[0] ];
- return false;
- break;
- default :
- return $_wp_theme_features[ $feature ];
- break;
- }
- }
- /**
- * Allows a theme to de-register its support of a certain feature
- *
- * Should be called in the theme's functions.php file. Generally would
- * be used for child themes to override support from the parent theme.
- *
- * @since 3.0.0
- * @see add_theme_support()
- * @param string $feature the feature being added
- * @return bool Whether feature was removed.
- */
- function remove_theme_support( $feature ) {
- // Blacklist: for internal registrations not used directly by themes.
- if ( in_array( $feature, array( 'editor-style', 'widgets', 'menus' ) ) )
- return false;
- return _remove_theme_support( $feature );
- }
- /**
- * Do not use. Removes theme support internally, ignorant of the blacklist.
- *
- * @access private
- * @since 3.1.0
- */
- function _remove_theme_support( $feature ) {
- global $_wp_theme_features;
- switch ( $feature ) {
- case 'custom-header-uploads' :
- if ( ! isset( $_wp_theme_features['custom-header'] ) )
- return false;
- add_theme_support( 'custom-header', array( 'uploads' => false ) );
- return; // Do not continue - custom-header-uploads no longer exists.
- }
- if ( ! isset( $_wp_theme_features[ $feature ] ) )
- return false;
- switch ( $feature ) {
- case 'custom-header' :
- $support = get_theme_support( 'custom-header' );
- if ( $support[0]['wp-head-callback'] )
- remove_action( 'wp_head', $support[0]['wp-head-callback'] );
- remove_action( 'admin_menu', array( $GLOBALS['custom_image_header'], 'init' ) );
- unset( $GLOBALS['custom_image_header'] );
- break;
- case 'custom-background' :
- $support = get_theme_support( 'custom-background' );
- remove_action( 'wp_head', $support[0]['wp-head-callback'] );
- remove_action( 'admin_menu', array( $GLOBALS['custom_background'], 'init' ) );
- unset( $GLOBALS['custom_background'] );
- break;
- }
- unset( $_wp_theme_features[ $feature ] );
- return true;
- }
- /**
- * Checks a theme's support for a given feature
- *
- * @since 2.9.0
- * @param string $feature the feature being checked
- * @return boolean
- */
- function current_theme_supports( $feature ) {
- global $_wp_theme_features;
- if ( 'custom-header-uploads' == $feature )
- return current_theme_supports( 'custom-header', 'uploads' );
- if ( !isset( $_wp_theme_features[$feature] ) )
- return false;
- // If no args passed then no extra checks need be performed
- if ( func_num_args() <= 1 )
- return true;
- $args = array_slice( func_get_args(), 1 );
- switch ( $feature ) {
- case 'post-thumbnails':
- // post-thumbnails can be registered for only certain content/post types by passing
- // an array of types to add_theme_support(). If no array was passed, then
- // any type is accepted
- if ( true === $_wp_theme_features[$feature] ) // Registered for all types
- return true;
- $content_type = $args[0];
- return in_array( $content_type, $_wp_theme_features[$feature][0] );
- break;
- case 'post-formats':
- // specific post formats can be registered by passing an array of types to
- // add_theme_support()
- $post_format = $args[0];
- return in_array( $post_format, $_wp_theme_features[$feature][0] );
- break;
- case 'custom-header':
- case 'custom-background' :
- // specific custom header and background capabilities can be registered by passing
- // an array to add_theme_support()
- $header_support = $args[0];
- return ( isset( $_wp_theme_features[$feature][0][$header_support] ) && $_wp_theme_features[$feature][0][$header_support] );
- break;
- }
- return apply_filters('current_theme_supports-' . $feature, true, $args, $_wp_theme_features[$feature]);
- }
- /**
- * Checks a theme's support for a given feature before loading the functions which implement it.
- *
- * @since 2.9.0
- * @param string $feature the feature being checked
- * @param string $include the file containing the functions that implement the feature
- */
- function require_if_theme_supports( $feature, $include) {
- if ( current_theme_supports( $feature ) )
- require ( $include );
- }
- /**
- * Checks an attachment being deleted to see if it's a header or background image.
- *
- * If true it removes the theme modification which would be pointing at the deleted
- * attachment
- *
- * @access private
- * @since 3.0.0
- * @param int $id the attachment id
- */
- function _delete_attachment_theme_mod( $id ) {
- $attachment_image = wp_get_attachment_url( $id );
- $header_image = get_header_image();
- $background_image = get_background_image();
- if ( $header_image && $header_image == $attachment_image )
- remove_theme_mod( 'header_image' );
- if ( $background_image && $background_image == $attachment_image )
- remove_theme_mod( 'background_image' );
- }
- add_action( 'delete_attachment', '_delete_attachment_theme_mod' );
- /**
- * Checks if a theme has been changed and runs 'after_switch_theme' hook on the next WP load
- *
- * @since 3.3.0
- */
- function check_theme_switched() {
- if ( $stylesheet = get_option( 'theme_switched' ) ) {
- $old_theme = wp_get_theme( $stylesheet );
- if ( $old_theme->exists() )
- do_action( 'after_switch_theme', $old_theme->get('Name'), $old_theme );
- else
- do_action( 'after_switch_theme', $stylesheet );
- update_option( 'theme_switched', false );
- }
- }
- /**
- * Includes and instantiates the WP_Customize_Manager class.
- *
- * Fires when ?wp_customize=on or on wp-admin/customize.php.
- *
- * @since 3.4.0
- */
- function _wp_customize_include() {
- if ( ! ( ( isset( $_REQUEST['wp_customize'] ) && 'on' == $_REQUEST['wp_customize'] )
- || ( is_admin() && 'customize.php' == basename( $_SERVER['PHP_SELF'] ) )
- ) )
- return;
- require( ABSPATH . WPINC . '/class-wp-customize-manager.php' );
- // Init Customize class
- $GLOBALS['wp_customize'] = new WP_Customize_Manager;
- }
- add_action( 'plugins_loaded', '_wp_customize_include' );
- /**
- * Adds settings for the customize-loader script.
- *
- * @since 3.4.0
- */
- function _wp_customize_loader_settings() {
- global $wp_scripts;
- $admin_origin = parse_url( admin_url() );
- $home_origin = parse_url( home_url() );
- $cross_domain = ( strtolower( $admin_origin[ 'host' ] ) != strtolower( $home_origin[ 'host' ] ) );
- $browser = array(
- 'mobile' => wp_is_mobile(),
- 'ios' => wp_is_mobile() && preg_match( '/iPad|iPod|iPhone/', $_SERVER['HTTP_USER_AGENT'] ),
- );
- $settings = array(
- 'url' => esc_url( admin_url( 'customize.php' ) ),
- 'isCrossDomain' => $cross_domain,
- 'browser' => $browser,
- );
- $script = 'var _wpCustomizeLoaderSettings = ' . json_encode( $settings ) . ';';
- $data = $wp_scripts->get_data( 'customize-loader', 'data' );
- if ( $data )
- $script = "$data\n$script";
- $wp_scripts->add_data( 'customize-loader', 'data', $script );
- }
- add_action( 'admin_enqueue_scripts', '_wp_customize_loader_settings' );
- /**
- * Returns a URL to load the theme customizer.
- *
- * @since 3.4.0
- *
- * @param string $stylesheet Optional. Theme to customize. Defaults to current theme.
- */
- function wp_customize_url( $stylesheet = null ) {
- $url = admin_url( 'customize.php' );
- if ( $stylesheet )
- $url .= '?theme=' . $stylesheet;
- return esc_url( $url );
- }
- /**
- * Prints a script to check whether or not the customizer is supported,
- * and apply either the no-customize-support or customize-support class
- * to the body.
- *
- * This function MUST be called inside the body tag.
- *
- * Ideally, call this function immediately after the body tag is opened.
- * This prevents a flash of unstyled content.
- *
- * It is also recommended that you add the "no-customize-support" class
- * to the body tag by default.
- *
- * @since 3.4.0
- */
- function wp_customize_support_script() {
- $admin_origin = parse_url( admin_url() );
- $home_origin = parse_url( home_url() );
- $cross_domain = ( strtolower( $admin_origin[ 'host' ] ) != strtolower( $home_origin[ 'host' ] ) );
- ?>
- <script type="text/javascript">
- (function() {
- var request, b = document.body, c = 'className', cs = 'customize-support', rcs = new RegExp('(^|\\s+)(no-)?'+cs+'(\\s+|$)');
- <?php if ( $cross_domain ): ?>
- request = (function(){ var xhr = new XMLHttpRequest(); return ('withCredentials' in xhr); })();
- <?php else: ?>
- request = true;
- <?php endif; ?>
- b[c] = b[c].replace( rcs, '' );
- b[c] += ( window.postMessage && request ? ' ' : ' no-' ) + cs;
- }());
- </script>
- <?php
- }