WordPress 3.9

[autoinstalls/wordpress.git] / wp-includes / class.wp-styles.php

diff --git a/wp-includes/class.wp-styles.php b/wp-includes/class.wp-styles.php
index 874e1a48d8b24d600939fe0f1563077383f0df56..dbdc82984dc8c94a71df68f2638b7c64acc241e0 100644 (file)
--- a/wp-includes/class.wp-styles.php
+++ b/wp-includes/class.wp-styles.php
@@ -29,6 +29,13 @@ class WP_Styles extends WP_Dependencies {
        var $default_dirs;
 
        function __construct() {
+               /**
+                * Fires when the WP_Styles instance is initialized.
+                *
+                * @since 2.6.0
+                *
+                * @param WP_Styles &$this WP_Styles instance, passed by reference.
+                */
                do_action_ref_array( 'wp_default_styles', array(&$this) );
        }
 
@@ -62,9 +69,21 @@ class WP_Styles extends WP_Dependencies {
                        $media = 'all';
 
                $href = $this->_css_href( $obj->src, $ver, $handle );
+               if ( empty( $href ) ) {
+                       // Turns out there is nothing to print.
+                       return true;
+               }
                $rel = isset($obj->extra['alt']) && $obj->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';
                $title = isset($obj->extra['title']) ? "title='" . esc_attr( $obj->extra['title'] ) . "'" : '';
 
+               /**
+                * Filter the HTML link tag of an enqueued style.
+                *
+                * @since 2.6.0
+                *
+                * @param string         The link tag for the enqueued style.
+                * @param string $handle The style's registered handle.
+                */
                $tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-css' $title href='$href' type='text/css' media='$media' />\n", $handle );
                if ( 'rtl' === $this->text_direction && isset($obj->extra['rtl']) && $obj->extra['rtl'] ) {
                        if ( is_bool( $obj->extra['rtl'] ) || 'replace' === $obj->extra['rtl'] ) {
@@ -74,6 +93,14 @@ class WP_Styles extends WP_Dependencies {
                                $rtl_href = $this->_css_href( $obj->extra['rtl'], $ver, "$handle-rtl" );
                        }
 
+                       /**
+                        * Filter the right-to-left (RTL) HTML link tag of an enqueued style.
+                        *
+                        * @since 2.6.0
+                        *
+                        * @param string $rtl_style The right to left link tag for the enqueued style.
+                        * @param string $handle    The style's registered handle.
+                        */
                        $rtl_tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-rtl-css' $title href='$rtl_href' type='text/css' media='$media' />\n", $handle );
 
                        if ( $obj->extra['rtl'] === 'replace' ) {
@@ -132,8 +159,16 @@ class WP_Styles extends WP_Dependencies {
 
        function all_deps( $handles, $recursion = false, $group = false ) {
                $r = parent::all_deps( $handles, $recursion );
-               if ( !$recursion )
+               if ( !$recursion ) {
+                       /**
+                        * Filter the array of enqueued styles before processing for output.
+                        *
+                        * @since 2.6.0
+                        *
+                        * @param array $to_do The list of enqueued styles about to be processed.
+                        */
                        $this->to_do = apply_filters( 'print_styles_array', $this->to_do );
+               }
                return $r;
        }
 
@@ -144,6 +179,15 @@ class WP_Styles extends WP_Dependencies {
 
                if ( !empty($ver) )
                        $src = add_query_arg('ver', $ver, $src);
+
+               /**
+                * Filter an enqueued style's fully-qualified URL.
+                *
+                * @since 2.6.0
+                *
+                * @param string $src    The source URL of the enqueued style.
+                * @param string $handle The style's registered handle.
+                */
                $src = apply_filters( 'style_loader_src', $src, $handle );
                return esc_url( $src );
        }