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Edit File: theme.php
<?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 * * @global array $wp_theme_directories * @staticvar array $_themes * * @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 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 * * @global array $wp_theme_directories * * @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 ); } /** * Clears the cache held by get_theme_roots() and WP_Theme. * * @since 3.5.0 * @param bool $clear_update_cache Whether to clear the Theme updates cache */ function wp_clean_themes_cache( $clear_update_cache = true ) { if ( $clear_update_cache ) delete_site_transient( 'update_themes' ); search_theme_directories( true ); foreach ( wp_get_themes( array( 'errors' => null ) ) as $theme ) $theme->cache_delete(); } /** * 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 intents and purposes, the template name and the stylesheet name are * going to be the same for most cases. * * @since 1.5.0 * * @return string Stylesheet name. */ function get_stylesheet() { /** * Filters the name of current stylesheet. * * @since 1.5.0 * * @param string $stylesheet Name of the current stylesheet. */ return apply_filters( 'stylesheet', get_option( 'stylesheet' ) ); } /** * Retrieve stylesheet directory path for current theme. * * @since 1.5.0 * * @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"; /** * Filters the stylesheet directory path for current theme. * * @since 1.5.0 * * @param string $stylesheet_dir Absolute path to the current theme. * @param string $stylesheet Directory name of the current theme. * @param string $theme_root Absolute path to themes directory. */ 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 = str_replace( '%2F', '/', rawurlencode( get_stylesheet() ) ); $theme_root_uri = get_theme_root_uri( $stylesheet ); $stylesheet_dir_uri = "$theme_root_uri/$stylesheet"; /** * Filters the stylesheet directory URI. * * @since 1.5.0 * * @param string $stylesheet_dir_uri Stylesheet directory URI. * @param string $stylesheet Name of the activated theme's directory. * @param string $theme_root_uri Themes root URI. */ return apply_filters( 'stylesheet_directory_uri', $stylesheet_dir_uri, $stylesheet, $theme_root_uri ); } /** * Retrieves the URI of current theme stylesheet. * * The stylesheet file name is 'style.css' which is appended to the stylesheet directory URI path. * See get_stylesheet_directory_uri(). * * @since 1.5.0 * * @return string */ function get_stylesheet_uri() { $stylesheet_dir_uri = get_stylesheet_directory_uri(); $stylesheet_uri = $stylesheet_dir_uri . '/style.css'; /** * Filters the URI of the current theme stylesheet. * * @since 1.5.0 * * @param string $stylesheet_uri Stylesheet URI for the current theme/child theme. * @param string $stylesheet_dir_uri Stylesheet directory URI for the current theme/child theme. */ return apply_filters( 'stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri ); } /** * Retrieves the 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 {@see 'stylesheet_directory_uri'} or {@see 'locale_stylesheet_uri'} filters. * * 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 * * @global WP_Locale $wp_locale * * @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 = ''; /** * Filters the localized stylesheet URI. * * @since 2.1.0 * * @param string $stylesheet_uri Localized stylesheet URI. * @param string $stylesheet_dir_uri Stylesheet directory URI. */ return apply_filters( 'locale_stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri ); } /** * Retrieve name of the current theme. * * @since 1.5.0 * * @return string Template name. */ function get_template() { /** * Filters the name of the current theme. * * @since 1.5.0 * * @param string $template Current theme's directory name. */ return apply_filters( 'template', get_option( 'template' ) ); } /** * Retrieve current theme directory. * * @since 1.5.0 * * @return string Template directory path. */ function get_template_directory() { $template = get_template(); $theme_root = get_theme_root( $template ); $template_dir = "$theme_root/$template"; /** * Filters the current theme directory path. * * @since 1.5.0 * * @param string $template_dir The URI of the current theme directory. * @param string $template Directory name of the current theme. * @param string $theme_root Absolute path to the themes directory. */ return apply_filters( 'template_directory', $template_dir, $template, $theme_root ); } /** * Retrieve theme directory URI. * * @since 1.5.0 * * @return string Template directory URI. */ function get_template_directory_uri() { $template = str_replace( '%2F', '/', rawurlencode( get_template() ) ); $theme_root_uri = get_theme_root_uri( $template ); $template_dir_uri = "$theme_root_uri/$template"; /** * Filters the current theme directory URI. * * @since 1.5.0 * * @param string $template_dir_uri The URI of the current theme directory. * @param string $template Directory name of the current theme. * @param string $theme_root_uri The themes root URI. */ return apply_filters( 'template_directory_uri', $template_dir_uri, $template, $theme_root_uri ); } /** * Retrieve theme roots. * * @since 2.9.0 * * @global array $wp_theme_directories * * @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 * * @global array $wp_theme_directories * * @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; } } if ( ! is_array( $wp_theme_directories ) ) { $wp_theme_directories = array(); } $untrailed = untrailingslashit( $directory ); if ( ! empty( $untrailed ) && ! in_array( $untrailed, $wp_theme_directories ) ) { $wp_theme_directories[] = $untrailed; } return true; } /** * Search all registered theme directories for complete and valid themes. * * @since 2.9.0 * * @global array $wp_theme_directories * @staticvar array $found_themes * * @param bool $force Optional. Whether to force a new directory scan. Defaults to false. * @return array|false Valid themes found */ function search_theme_directories( $force = false ) { global $wp_theme_directories; static $found_themes = null; if ( empty( $wp_theme_directories ) ) return false; if ( ! $force && isset( $found_themes ) ) return $found_themes; $found_themes = array(); $wp_theme_directories = (array) $wp_theme_directories; $relative_theme_roots = array(); // Set up maybe-relative, maybe-absolute array of theme directories. // We always want to return absolute, but we need to cache relative // to use in 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; } /** * Filters whether to get the cache of the registered theme directories. * * @since 3.4.0 * * @param bool $cache_expiration Whether to get the cache of the theme directories. Default false. * @param string $cache_directory Directory to be searched for the cache. */ 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 ( ! $dirs ) { trigger_error( "$theme_root is not readable", E_USER_NOTICE ); continue; } 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 ( ! $sub_dirs ) { trigger_error( "$theme_root/$dir is not readable", E_USER_NOTICE ); continue; } 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 * * @global array $wp_theme_directories * * @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'; } /** * Filters the absolute path to the themes directory. * * @since 1.5.0 * * @param string $theme_root Absolute path to themes directory. */ return apply_filters( 'theme_root', $theme_root ); } /** * Retrieve URI for themes directory. * * Does not have trailing slash. * * @since 1.5.0 * * @global array $wp_theme_directories * * @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' ); } /** * Filters the URI for themes directory. * * @since 1.5.0 * * @param string $theme_root_uri The URI for themes directory. * @param string $siteurl WordPress web address which is set in General Options. * @param string $stylesheet_or_template Stylesheet or template name of the theme. */ 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 * * @global array $wp_theme_directories * * @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" />'; } /** * Switches the theme. * * Accepts one argument: $stylesheet of the theme. It also accepts an additional function signature * of two arguments: $template then $stylesheet. This is for backward compatibility. * * @since 2.5.0 * * @global array $wp_theme_directories * @global WP_Customize_Manager $wp_customize * @global array $sidebars_widgets * * @param string $stylesheet Stylesheet name */ function switch_theme( $stylesheet ) { global $wp_theme_directories, $wp_customize, $sidebars_widgets; $_sidebars_widgets = null; if ( 'wp_ajax_customize_save' === current_action() ) { $_sidebars_widgets = $wp_customize->post_value( $wp_customize->get_setting( 'old_sidebars_widgets_data' ) ); } elseif ( is_array( $sidebars_widgets ) ) { $_sidebars_widgets = $sidebars_widgets; } if ( is_array( $_sidebars_widgets ) ) { set_theme_mod( 'sidebars_widgets', array( 'time' => time(), 'data' => $_sidebars_widgets ) ); } $nav_menu_locations = get_theme_mod( 'nav_menu_locations' ); if ( func_num_args() > 1 ) { $stylesheet = func_get_arg( 1 ); } $old_theme = wp_get_theme(); $new_theme = wp_get_theme( $stylesheet ); $template = $new_theme->get_template(); 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 ) ); } else { delete_option( 'template_root' ); delete_option( 'stylesheet_root' ); } $new_name = $new_theme->get('Name'); update_option( 'current_theme', $new_name ); // Migrate from the old mods_{name} option to theme_mods_{slug}. if ( is_admin() && false === get_option( 'theme_mods_' . $stylesheet ) ) { $default_theme_mods = (array) get_option( 'mods_' . $new_name ); if ( ! empty( $nav_menu_locations ) && empty( $default_theme_mods['nav_menu_locations'] ) ) { $default_theme_mods['nav_menu_locations'] = $nav_menu_locations; } add_option( "theme_mods_$stylesheet", $default_theme_mods ); } else { /* * Since retrieve_widgets() is called when initializing a theme in the Customizer, * we need to remove the theme mods to avoid overwriting changes made via * the Customizer when accessing wp-admin/widgets.php. */ if ( 'wp_ajax_customize_save' === current_action() ) { remove_theme_mod( 'sidebars_widgets' ); } if ( ! empty( $nav_menu_locations ) ) { $nav_mods = get_theme_mod( 'nav_menu_locations' ); if ( empty( $nav_mods ) ) { set_theme_mod( 'nav_menu_locations', $nav_menu_locations ); } } } update_option( 'theme_switched', $old_theme->get_stylesheet() ); /** * Fires after the theme is switched. * * @since 1.5.0 * @since 4.5.0 Introduced the `$old_theme` parameter. * * @param string $new_name Name of the new theme. * @param WP_Theme $new_theme WP_Theme instance of the new theme. * @param WP_Theme $old_theme WP_Theme instance of the old theme. */ do_action( 'switch_theme', $new_name, $new_theme, $old_theme ); } /** * Checks that current theme files 'index.php' and 'style.css' exists. * * Does not initially check the default theme, which is the fallback and should always exist. * But if it doesn't exist, it'll fall back to the latest core default theme that does exist. * Will switch theme to the fallback theme if current theme does not validate. * * You can use the {@see '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() { /** * Filters whether to validate the current theme. * * @since 2.7.0 * * @param bool $validate Whether to validate the current theme. Default true. */ if ( wp_installing() || ! apply_filters( 'validate_current_theme', true ) ) return true; if ( ! file_exists( get_template_directory() . '/index.php' ) ) { // Invalid. } elseif ( ! file_exists( get_template_directory() . '/style.css' ) ) { // Invalid. } elseif ( is_child_theme() && ! file_exists( get_stylesheet_directory() . '/style.css' ) ) { // Invalid. } else { // Valid. return true; } $default = wp_get_theme( WP_DEFAULT_THEME ); if ( $default->exists() ) { switch_theme( WP_DEFAULT_THEME ); return false; } /** * If we're in an invalid state but WP_DEFAULT_THEME doesn't exist, * switch to the latest core default theme that's installed. * If it turns out that this latest core default theme is our current * theme, then there's nothing we can do about that, so we have to bail, * rather than going into an infinite loop. (This is why there are * checks against WP_DEFAULT_THEME above, also.) We also can't do anything * if it turns out there is no default theme installed. (That's `false`.) */ $default = WP_Theme::get_core_default_theme(); if ( false === $default || get_stylesheet() == $default->get_stylesheet() ) { return true; } switch_theme( $default->get_stylesheet() ); return false; } /** * Retrieve all theme modifications. * * @since 3.1.0 * * @return array|void Theme modifications. */ function get_theme_mods() { $theme_slug = get_option( 'stylesheet' ); $mods = get_option( "theme_mods_$theme_slug" ); if ( false === $mods ) { $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 https://secure.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 * * @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] ) ) { /** * Filters the theme modification, or 'theme_mod', value. * * The dynamic portion of the hook name, `$name`, refers to * the key name of the modification array. For example, * 'header_textcolor', 'header_image', and so on depending * on the theme options. * * @since 2.2.0 * * @param string $current_mod The value of the current theme modification. */ return apply_filters( "theme_mod_{$name}", $mods[$name] ); } if ( is_string( $default ) ) $default = sprintf( $default, get_template_directory_uri(), get_stylesheet_directory_uri() ); /** This filter is documented in wp-includes/theme.php */ return apply_filters( "theme_mod_{$name}", $default ); } /** * Update theme modification value for the current theme. * * @since 2.1.0 * * @param string $name Theme modification name. * @param mixed $value Theme modification value. */ function set_theme_mod( $name, $value ) { $mods = get_theme_mods(); $old_value = isset( $mods[ $name ] ) ? $mods[ $name ] : false; /** * Filters the theme mod value on save. * * The dynamic portion of the hook name, `$name`, refers to the key name of * the modification array. For example, 'header_textcolor', 'header_image', * and so on depending on the theme options. * * @since 3.9.0 * * @param string $value The new value of the theme mod. * @param string $old_value The current value of the theme mod. */ $mods[ $name ] = apply_filters( "pre_set_theme_mod_$name", $value, $old_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. */ function remove_theme_mod( $name ) { $mods = get_theme_mods(); if ( ! isset( $mods[ $name ] ) ) return; unset( $mods[ $name ] ); if ( empty( $mods ) ) { remove_theme_mods(); return; } $theme = get_option( 'stylesheet' ); update_option( "theme_mods_$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 ); } /** * Retrieves the custom header text color in HEX format. * * @since 2.1.0 * * @return string Header text color in HEX format (minus the hash symbol). */ function get_header_textcolor() { return get_theme_mod('header_textcolor', get_theme_support( 'custom-header', 'default-text-color' ) ); } /** * Displays the custom header text color in HEX format (minus the hash symbol). * * @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; } /** * Check whether a header image is set or not. * * @since 4.2.0 * * @see get_header_image() * * @return bool Whether a header image is set or not. */ function has_header_image() { return (bool) get_header_image(); } /** * Retrieve header image for custom header. * * @since 2.1.0 * * @return string|false */ 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(); return esc_url_raw( set_url_scheme( $url ) ); } /** * Create image tag markup for a custom header image. * * @since 4.4.0 * * @param array $attr Optional. Additional attributes for the image tag. Can be used * to override the default attributes. Default empty. * @return string HTML image element markup or empty string on failure. */ function get_header_image_tag( $attr = array() ) { $header = get_custom_header(); if ( empty( $header->url ) ) { return ''; } $width = absint( $header->width ); $height = absint( $header->height ); $attr = wp_parse_args( $attr, array( 'src' => $header->url, 'width' => $width, 'height' => $height, 'alt' => get_bloginfo( 'name' ), ) ); // Generate 'srcset' and 'sizes' if not already present. if ( empty( $attr['srcset'] ) && ! empty( $header->attachment_id ) ) { $image_meta = get_post_meta( $header->attachment_id, '_wp_attachment_metadata', true ); $size_array = array( $width, $height ); if ( is_array( $image_meta ) ) { $srcset = wp_calculate_image_srcset( $size_array, $header->url, $image_meta, $header->attachment_id ); $sizes = ! empty( $attr['sizes'] ) ? $attr['sizes'] : wp_calculate_image_sizes( $size_array, $header->url, $image_meta, $header->attachment_id ); if ( $srcset && $sizes ) { $attr['srcset'] = $srcset; $attr['sizes'] = $sizes; } } } $attr = array_map( 'esc_attr', $attr ); $html = '<img'; foreach ( $attr as $name => $value ) { $html .= ' ' . $name . '="' . $value . '"'; } $html .= ' />'; /** * Filters the markup of header images. * * @since 4.4.0 * * @param string $html The HTML image tag markup being filtered. * @param object $header The custom header object returned by 'get_custom_header()'. * @param array $attr Array of the attributes for the image tag. */ return apply_filters( 'get_header_image_tag', $html, $header, $attr ); } /** * Display the image markup for a custom header image. * * @since 4.4.0 * * @param array $attr Optional. Attributes for the image markup. Default empty. */ function the_header_image_tag( $attr = array() ) { echo get_header_image_tag( $attr ); } /** * Get random header image data from registered images in theme. * * @since 3.4.0 * * @access private * * @global array $_wp_default_headers * @staticvar object $_wp_random_header * * @return object */ function _get_random_header_data() { static $_wp_random_header = null; 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 bool */ 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 URL. * * @since 2.1.0 */ function header_image() { $image = get_header_image(); if ( $image ) { echo esc_url( $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( wp_get_attachment_url( $header->ID ) ); $header_data = wp_get_attachment_metadata( $header->ID ); $header_index = $header->ID; $header_images[$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]['alt_text'] = get_post_meta( $header->ID, '_wp_attachment_image_alt', true ); if ( isset( $header_data['width'] ) ) $header_images[$header_index]['width'] = $header_data['width']; if ( isset( $header_data['height'] ) ) $header_images[$header_index]['height'] = $header_data['height']; } return $header_images; } /** * Get the header image data. * * @since 3.4.0 * * @global array $_wp_default_headers * * @return object */ function get_custom_header() { global $_wp_default_headers; if ( is_random_header_image() ) { $data = _get_random_header_data(); } else { $data = get_theme_mod( 'header_image_data' ); if ( ! $data && current_theme_supports( 'custom-header', 'default-image' ) ) { $directory_args = array( get_template_directory_uri(), get_stylesheet_directory_uri() ); $data = array(); $data['url'] = $data['thumbnail_url'] = vsprintf( get_theme_support( 'custom-header', 'default-image' ), $directory_args ); if ( ! empty( $_wp_default_headers ) ) { foreach ( (array) $_wp_default_headers as $default_header ) { $url = vsprintf( $default_header['url'], $directory_args ); if ( $data['url'] == $url ) { $data = $default_header; $data['url'] = $url; $data['thumbnail_url'] = vsprintf( $data['thumbnail_url'], $directory_args ); break; } } } } } $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 * * @global array $_wp_default_headers * * @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 * * @global array $_wp_default_headers * * @param string|array $header The header string id (key of array) to remove, or an array thereof. * @return bool|void A single header returns true on success, false on failure. * There is currently no return value for multiple headers. */ 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 = set_url_scheme( 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_background_color(); if ( $color === get_theme_support( 'custom-background', 'default-color' ) ) { $color = false; } if ( ! $background && ! $color ) return; $style = $color ? "background-color: #$color;" : ''; if ( $background ) { $image = " background-image: url('" . esc_url_raw( $background ) . "');"; $repeat = get_theme_mod( 'background_repeat', get_theme_support( 'custom-background', 'default-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', get_theme_support( 'custom-background', 'default-position-x' ) ); if ( ! in_array( $position, array( 'center', 'right', 'left' ) ) ) $position = 'left'; $position = " background-position: top $position;"; $attachment = get_theme_mod( 'background_attachment', get_theme_support( 'custom-background', 'default-attachment' ) ); 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 * * @global array $editor_styles * * @param array|string $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 * * @global array $editor_styles * * @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; } /** * Retrieve any registered editor stylesheets * * @since 4.0.0 * * @global array $editor_styles Registered editor stylesheets * * @return array If registered, a list of editor stylesheet URLs. */ function get_editor_stylesheets() { $stylesheets = array(); // load editor_style.css if the current theme supports it if ( ! empty( $GLOBALS['editor_styles'] ) && is_array( $GLOBALS['editor_styles'] ) ) { $editor_styles = $GLOBALS['editor_styles']; $editor_styles = array_unique( array_filter( $editor_styles ) ); $style_uri = get_stylesheet_directory_uri(); $style_dir = get_stylesheet_directory(); // Support externally referenced styles (like, say, fonts). foreach ( $editor_styles as $key => $file ) { if ( preg_match( '~^(https?:)?//~', $file ) ) { $stylesheets[] = esc_url_raw( $file ); unset( $editor_styles[ $key ] ); } } // Look in a parent theme first, that way child theme CSS overrides. if ( is_child_theme() ) { $template_uri = get_template_directory_uri(); $template_dir = get_template_directory(); foreach ( $editor_styles as $key => $file ) { if ( $file && file_exists( "$template_dir/$file" ) ) { $stylesheets[] = "$template_uri/$file"; } } } foreach ( $editor_styles as $file ) { if ( $file && file_exists( "$style_dir/$file" ) ) { $stylesheets[] = "$style_uri/$file"; } } } /** * Filters the array of stylesheets applied to the editor. * * @since 4.3.0 * * @param array $stylesheets Array of stylesheets to be applied to the editor. */ return apply_filters( 'editor_stylesheets', $stylesheets ); } /** * Registers theme support for a given feature. * * Must be called in the theme's functions.php file to work. * If attached to a hook, it must be {@see 'after_setup_theme'}. * The {@see 'init'} hook may be too late for some features. * * @since 2.9.0 * @since 3.6.0 The `html5` feature was added * @since 3.9.0 The `html5` feature now also accepts 'gallery' and 'caption' * @since 4.1.0 The `title-tag` feature was added * @since 4.5.0 The `customize-selective-refresh-widgets` feature was added * * @global array $_wp_theme_features * * @param string $feature The feature being added. Likely core values include 'post-formats', * 'post-thumbnails', 'html5', 'custom-logo', 'custom-header-uploads', * 'custom-header', 'custom-background', 'title-tag', etc. * @param mixed $args,... Optional extra arguments to pass along with certain features. * @return void|bool False on failure, void otherwise. */ 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-thumbnails': // All post types are already supported. if ( true === get_theme_support( 'post-thumbnails' ) ) { return; } /* * Merge post types with any that already declared their support * for post thumbnails. */ if ( is_array( $args[0] ) && isset( $_wp_theme_features['post-thumbnails'] ) ) { $args[0] = array_unique( array_merge( $_wp_theme_features['post-thumbnails'][0], $args[0] ) ); } break; case 'post-formats' : if ( is_array( $args[0] ) ) { $post_formats = get_post_format_slugs(); unset( $post_formats['standard'] ); $args[0] = array_intersect( $args[0], array_keys( $post_formats ) ); } break; case 'html5' : // You can't just pass 'html5', you need to pass an array of types. if ( empty( $args[0] ) ) { // Build an array of types for back-compat. $args = array( 0 => array( 'comment-list', 'comment-form', 'search-form' ) ); } elseif ( ! is_array( $args[0] ) ) { _doing_it_wrong( "add_theme_support( 'html5' )", __( 'You need to pass an array of types.' ), '3.6.1' ); return false; } // Calling 'html5' again merges, rather than overwrites. if ( isset( $_wp_theme_features['html5'] ) ) $args[0] = array_merge( $_wp_theme_features['html5'][0], $args[0] ); break; case 'custom-logo': if ( ! is_array( $args ) ) { $args = array( 0 => array() ); } $defaults = array( 'width' => null, 'height' => null, 'flex-width' => false, 'flex-height' => false, 'header-text' => '', ); $args[0] = wp_parse_args( array_intersect_key( $args[0], $defaults ), $defaults ); // Allow full flexibility if no size is specified. if ( is_null( $args[0]['width'] ) && is_null( $args[0]['height'] ) ) { $args[0]['flex-width'] = true; $args[0]['flex-height'] = true; } break; case 'custom-header-uploads' : return add_theme_support( 'custom-header', array( 'uploads' => true ) ); 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 backward 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-repeat' => 'repeat', 'default-position-x' => 'left', 'default-attachment' => 'scroll', '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', $args[0]['default-image'] ); break; // Ensure that 'title-tag' is accessible in the admin. case 'title-tag' : // Can be called in functions.php but must happen before wp_loaded, i.e. not in header.php. if ( did_action( 'wp_loaded' ) ) { /* translators: 1: Theme support 2: hook name */ _doing_it_wrong( "add_theme_support( 'title-tag' )", sprintf( __( 'Theme support for %1$s should be registered before the %2$s hook.' ), '<code>title-tag</code>', '<code>wp_loaded</code>' ), '4.1.0' ); return false; } } $_wp_theme_features[ $feature ] = $args; } /** * Registers the internal custom header and background routines. * * @since 3.4.0 * @access private * * @global Custom_Image_Header $custom_image_header * @global Custom_Background $custom_background */ 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'] ); } } } /** * Adds CSS to hide header text for custom logo, based on Customizer setting. * * @since 4.5.0 * @access private */ function _custom_logo_header_styles() { if ( ! current_theme_supports( 'custom-header', 'header-text' ) && get_theme_support( 'custom-logo', 'header-text' ) && ! get_theme_mod( 'header_text', true ) ) { $classes = (array) get_theme_support( 'custom-logo', 'header-text' ); $classes = array_map( 'sanitize_html_class', $classes ); $classes = '.' . implode( ', .', $classes ); ?> <!-- Custom Logo: hide header text --> <style id="custom-logo-css" type="text/css"> <?php echo $classes; ?> { position: absolute; clip: rect(1px, 1px, 1px, 1px); } </style> <?php } } /** * Gets the theme support arguments passed when registering that support * * @since 3.1.0 * * @global array $_wp_theme_features * * @param string $feature the feature to check * @return mixed The array of extra arguments or the value for the registered feature. */ 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-logo' : 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; default : return $_wp_theme_features[ $feature ]; } } /** * 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|void 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 * * @global array $_wp_theme_features * @global Custom_Image_Header $custom_image_header * @global Custom_Background $custom_background * * @param string $feature */ 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' : if ( ! did_action( 'wp_loaded' ) ) break; $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' : if ( ! did_action( 'wp_loaded' ) ) break; $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 * * @global array $_wp_theme_features * * @param string $feature the feature being checked * @return bool */ 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] ); case 'html5': case 'post-formats': // specific post formats can be registered by passing an array of types to // add_theme_support() // Specific areas of HTML5 support *must* be passed via an array to add_theme_support() $type = $args[0]; return in_array( $type, $_wp_theme_features[$feature][0] ); case 'custom-logo': case 'custom-header': case 'custom-background': // Specific capabilities can be registered by passing an array to add_theme_support(). return ( isset( $_wp_theme_features[ $feature ][0][ $args[0] ] ) && $_wp_theme_features[ $feature ][0][ $args[0] ] ); } /** * Filters whether the current theme supports a specific feature. * * The dynamic portion of the hook name, `$feature`, refers to the specific theme * feature. Possible values include 'post-formats', 'post-thumbnails', 'custom-background', * 'custom-header', 'menus', 'automatic-feed-links', 'html5', and `customize-selective-refresh-widgets`. * * @since 3.4.0 * * @param bool true Whether the current theme supports the given feature. Default true. * @param array $args Array of arguments for the feature. * @param string $feature The theme feature. */ return apply_filters( "current_theme_supports-{$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 Path to the file. * @return bool True if the current theme supports the supplied feature, false otherwise. */ function require_if_theme_supports( $feature, $include ) { if ( current_theme_supports( $feature ) ) { require ( $include ); return true; } return false; } /** * 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 * @since 4.3.0 Also removes `header_image_data`. * @since 4.5.0 Also removes custom logo theme mods. * * @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(); $custom_logo_id = get_theme_mod( 'custom_logo' ); if ( $custom_logo_id && $custom_logo_id == $id ) { remove_theme_mod( 'custom_logo' ); remove_theme_mod( 'header_text' ); } if ( $header_image && $header_image == $attachment_image ) { remove_theme_mod( 'header_image' ); remove_theme_mod( 'header_image_data' ); } if ( $background_image && $background_image == $attachment_image ) { remove_theme_mod( 'background_image' ); } } /** * Checks if a theme has been changed and runs 'after_switch_theme' hook on the next WP load. * * See {@see 'after_switch_theme'}. * * @since 3.3.0 */ function check_theme_switched() { if ( $stylesheet = get_option( 'theme_switched' ) ) { $old_theme = wp_get_theme( $stylesheet ); // Prevent retrieve_widgets() from running since Customizer already called it up front if ( get_option( 'theme_switched_via_customizer' ) ) { remove_action( 'after_switch_theme', '_wp_sidebars_changed' ); update_option( 'theme_switched_via_customizer', false ); } if ( $old_theme->exists() ) { /** * Fires on the first WP load after a theme switch if the old theme still exists. * * This action fires multiple times and the parameters differs * according to the context, if the old theme exists or not. * If the old theme is missing, the parameter will be the slug * of the old theme. * * @since 3.3.0 * * @param string $old_name Old theme name. * @param WP_Theme $old_theme WP_Theme instance of the old theme. */ do_action( 'after_switch_theme', $old_theme->get( 'Name' ), $old_theme ); } else { /** This action is documented in wp-includes/theme.php */ do_action( 'after_switch_theme', $stylesheet ); } flush_rewrite_rules(); update_option( 'theme_switched', false ); } } /** * Includes and instantiates the WP_Customize_Manager class. * * Loads the Customizer at plugins_loaded when accessing the customize.php admin * page or when any request includes a wp_customize=on param, either as a GET * query var or as POST data. This param is a signal for whether to bootstrap * the Customizer when WordPress is loading, especially in the Customizer preview * or when making Customizer Ajax requests for widgets or menus. * * @since 3.4.0 * * @global WP_Customize_Manager $wp_customize */ function _wp_customize_include() { if ( ! ( ( isset( $_REQUEST['wp_customize'] ) && 'on' == $_REQUEST['wp_customize'] ) || ( is_admin() && 'customize.php' == basename( $_SERVER['PHP_SELF'] ) ) ) ) { return; } require_once ABSPATH . WPINC . '/class-wp-customize-manager.php'; $GLOBALS['wp_customize'] = new WP_Customize_Manager(); } /** * Adds settings for the customize-loader script. * * @since 3.4.0 */ function _wp_customize_loader_settings() { $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, 'l10n' => array( 'saveAlert' => __( 'The changes you made will be lost if you navigate away from this page.' ), 'mainIframeTitle' => __( 'Customizer' ), ), ); $script = 'var _wpCustomizeLoaderSettings = ' . wp_json_encode( $settings ) . ';'; $wp_scripts = wp_scripts(); $data = $wp_scripts->get_data( 'customize-loader', 'data' ); if ( $data ) $script = "$data\n$script"; $wp_scripts->add_data( 'customize-loader', 'data', $script ); } /** * Returns a URL to load the Customizer. * * @since 3.4.0 * * @param string $stylesheet Optional. Theme to customize. Defaults to current theme. * The theme's stylesheet will be urlencoded if necessary. * @return string */ function wp_customize_url( $stylesheet = null ) { $url = admin_url( 'customize.php' ); if ( $stylesheet ) $url .= '?theme=' . urlencode( $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 } /** * Whether the site is being previewed in the Customizer. * * @since 4.0.0 * * @global WP_Customize_Manager $wp_customize Customizer instance. * * @return bool True if the site is being previewed in the Customizer, false otherwise. */ function is_customize_preview() { global $wp_customize; return ( $wp_customize instanceof WP_Customize_Manager ) && $wp_customize->is_preview(); }
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