WP 4.0++

wp-includes/theme.php

@@ -137,7 +137,7 @@ function is_child_theme() {
  * 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
+ * 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
@@ -370,11 +370,19 @@ function register_theme_directory( $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 ) )
+		if ( ! file_exists( $directory ) ) {
 			return false;
+		}
 	}
 
-	$wp_theme_directories[] = $directory;
+	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;
 }
@@ -1394,6 +1402,54 @@ function remove_editor_styles() {
 	return true;
 }
 
+/**
+ * Retrieve any registered editor stylesheets
+ *
+ * @since 4.0.0
+ *
+ * @global $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";
+			}
+		}
+	}
+	return $stylesheets;
+}
+
 /**
  * Allows a theme to register its support of a certain feature
  *
@@ -1437,7 +1493,6 @@ function add_theme_support( $feature ) {
 
 		case 'custom-header-uploads' :
 			return add_theme_support( 'custom-header', array( 'uploads' => true ) );
-			break;
 
 		case 'custom-header' :
 			if ( ! is_array( $args ) )
@@ -1618,10 +1673,9 @@ function get_theme_support( $feature ) {
 			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;
 	}
 }
 
@@ -1720,7 +1774,6 @@ function current_theme_supports( $feature ) {
 				return true;
 			$content_type = $args[0];
 			return in_array( $content_type, $_wp_theme_features[$feature][0] );
-			break;
 
 		case 'html5':
 		case 'post-formats':
@@ -1731,7 +1784,6 @@ function current_theme_supports( $feature ) {
 
 			$type = $args[0];
 			return in_array( $type, $_wp_theme_features[$feature][0] );
-			break;
 
 		case 'custom-header':
 		case 'custom-background' :
@@ -1739,7 +1791,6 @@ function current_theme_supports( $feature ) {
 			// 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;
 	}
 
 	/**
@@ -1879,6 +1930,9 @@ function _wp_customize_loader_settings() {
 		'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.' ),
+		),
 	);
 
 	$script = 'var _wpCustomizeLoaderSettings = ' . json_encode( $settings ) . ';';
@@ -1943,3 +1997,18 @@ function wp_customize_support_script() {
 	</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 is_a( $wp_customize, 'WP_Customize_Manager' ) && $wp_customize->is_preview();
+}