wp-includes/class.wp-styles.php

   1 <?php
   2 /**
   3  * BackPress Styles enqueue.
   4  *
   5  * These classes were refactored from the WordPress WP_Scripts and WordPress
   6  * script enqueue API.
   7  *
   8  * @package BackPress
   9  * @since r74
  10  */
  11
  12 /**
  13  * BackPress Styles enqueue class.
  14  *
  15  * @package BackPress
  16  * @uses WP_Dependencies
  17  * @since r74
  18  */
  19 class WP_Styles extends WP_Dependencies {
  20         public $base_url;
  21         public $content_url;
  22         public $default_version;
  23         public $text_direction = 'ltr';
  24         public $concat = '';
  25         public $concat_version = '';
  26         public $do_concat = false;
  27         public $print_html = '';
  28         public $print_code = '';
  29         public $default_dirs;
  30
  31         public function __construct() {
  32                 /**
  33                  * Fires when the WP_Styles instance is initialized.
  34                  *
  35                  * @since 2.6.0
  36                  *
  37                  * @param WP_Styles &$this WP_Styles instance, passed by reference.
  38                  */
  39                 do_action_ref_array( 'wp_default_styles', array(&$this) );
  40         }
  41
  42         public function do_item( $handle ) {
  43                 if ( !parent::do_item($handle) )
  44                         return false;
  45
  46                 $obj = $this->registered[$handle];
  47                 if ( null === $obj->ver )
  48                         $ver = '';
  49                 else
  50                         $ver = $obj->ver ? $obj->ver : $this->default_version;
  51
  52                 if ( isset($this->args[$handle]) )
  53                         $ver = $ver ? $ver . '&amp;' . $this->args[$handle] : $this->args[$handle];
  54
  55                 if ( $this->do_concat ) {
  56                         if ( $this->in_default_dir($obj->src) && !isset($obj->extra['conditional']) && !isset($obj->extra['alt']) ) {
  57                                 $this->concat .= "$handle,";
  58                                 $this->concat_version .= "$handle$ver";
  59
  60                                 $this->print_code .= $this->print_inline_style( $handle, false );
  61
  62                                 return true;
  63                         }
  64                 }
  65
  66                 if ( isset($obj->args) )
  67                         $media = esc_attr( $obj->args );
  68                 else
  69                         $media = 'all';
  70
  71                 $href = $this->_css_href( $obj->src, $ver, $handle );
  72                 if ( empty( $href ) ) {
  73                         // Turns out there is nothing to print.
  74                         return true;
  75                 }
  76                 $rel = isset($obj->extra['alt']) && $obj->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';
  77                 $title = isset($obj->extra['title']) ? "title='" . esc_attr( $obj->extra['title'] ) . "'" : '';
  78
  79                 /**
  80                  * Filter the HTML link tag of an enqueued style.
  81                  *
  82                  * @since 2.6.0
  83                  *
  84                  * @param string         The link tag for the enqueued style.
  85                  * @param string $handle The style's registered handle.
  86                  */
  87                 $tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-css' $title href='$href' type='text/css' media='$media' />\n", $handle );
  88                 if ( 'rtl' === $this->text_direction && isset($obj->extra['rtl']) && $obj->extra['rtl'] ) {
  89                         if ( is_bool( $obj->extra['rtl'] ) || 'replace' === $obj->extra['rtl'] ) {
  90                                 $suffix = isset( $obj->extra['suffix'] ) ? $obj->extra['suffix'] : '';
  91                                 $rtl_href = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $this->_css_href( $obj->src , $ver, "$handle-rtl" ));
  92                         } else {
  93                                 $rtl_href = $this->_css_href( $obj->extra['rtl'], $ver, "$handle-rtl" );
  94                         }
  95
  96                         /** This filter is documented in wp-includes/class.wp-styles.php */
  97                         $rtl_tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-rtl-css' $title href='$rtl_href' type='text/css' media='$media' />\n", $handle );
  98
  99                         if ( $obj->extra['rtl'] === 'replace' ) {
 100                                 $tag = $rtl_tag;
 101                         } else {
 102                                 $tag .= $rtl_tag;
 103                         }
 104                 }
 105
 106                 if ( isset($obj->extra['conditional']) && $obj->extra['conditional'] ) {
 107                         $tag = "<!--[if {$obj->extra['conditional']}]>\n" . $tag . "<![endif]-->\n";
 108                 }
 109
 110                 if ( $this->do_concat ) {
 111                         $this->print_html .= $tag;
 112                         if ( $inline_style = $this->print_inline_style( $handle, false ) )
 113                                 $this->print_html .= sprintf( "<style type='text/css'>\n%s\n</style>\n", $inline_style );
 114                 } else {
 115                         echo $tag;
 116                         $this->print_inline_style( $handle );
 117                 }
 118
 119                 return true;
 120         }
 121
 122         public function add_inline_style( $handle, $code ) {
 123                 if ( !$code )
 124                         return false;
 125
 126                 $after = $this->get_data( $handle, 'after' );
 127                 if ( !$after )
 128                         $after = array();
 129
 130                 $after[] = $code;
 131
 132                 return $this->add_data( $handle, 'after', $after );
 133         }
 134
 135         public function print_inline_style( $handle, $echo = true ) {
 136                 $output = $this->get_data( $handle, 'after' );
 137
 138                 if ( empty( $output ) )
 139                         return false;
 140
 141                 $output = implode( "\n", $output );
 142
 143                 if ( !$echo )
 144                         return $output;
 145
 146                 echo "<style type='text/css'>\n";
 147                 echo "$output\n";
 148                 echo "</style>\n";
 149
 150                 return true;
 151         }
 152
 153         public function all_deps( $handles, $recursion = false, $group = false ) {
 154                 $r = parent::all_deps( $handles, $recursion );
 155                 if ( !$recursion ) {
 156                         /**
 157                          * Filter the array of enqueued styles before processing for output.
 158                          *
 159                          * @since 2.6.0
 160                          *
 161                          * @param array $to_do The list of enqueued styles about to be processed.
 162                          */
 163                         $this->to_do = apply_filters( 'print_styles_array', $this->to_do );
 164                 }
 165                 return $r;
 166         }
 167
 168         public function _css_href( $src, $ver, $handle ) {
 169                 if ( !is_bool($src) && !preg_match('|^(https?:)?//|', $src) && ! ( $this->content_url && 0 === strpos($src, $this->content_url) ) ) {
 170                         $src = $this->base_url . $src;
 171                 }
 172
 173                 if ( !empty($ver) )
 174                         $src = add_query_arg('ver', $ver, $src);
 175
 176                 /**
 177                  * Filter an enqueued style's fully-qualified URL.
 178                  *
 179                  * @since 2.6.0
 180                  *
 181                  * @param string $src    The source URL of the enqueued style.
 182                  * @param string $handle The style's registered handle.
 183                  */
 184                 $src = apply_filters( 'style_loader_src', $src, $handle );
 185                 return esc_url( $src );
 186         }
 187
 188         public function in_default_dir($src) {
 189                 if ( ! $this->default_dirs )
 190                         return true;
 191
 192                 foreach ( (array) $this->default_dirs as $test ) {
 193                         if ( 0 === strpos($src, $test) )
 194                                 return true;
 195                 }
 196                 return false;
 197         }
 198
 199         public function do_footer_items() { // HTML 5 allows styles in the body, grab late enqueued items and output them in the footer.
 200                 $this->do_items(false, 1);
 201                 return $this->done;
 202         }
 203
 204         public function reset() {
 205                 $this->do_concat = false;
 206                 $this->concat = '';
 207                 $this->concat_version = '';
 208                 $this->print_html = '';
 209         }
 210 }