Introduce display_header_text(). props chipbennett for initial patch. see #18887.

git-svn-id: http://svn.automattic.com/wordpress/trunk@20240 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/theme.php

@@ -918,6 +918,21 @@ 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 $text_color && 'blank' != $text_color;
+}
+
 /**
  * Retrieve header image for custom header.
  *