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         /**
  43          * @param string $handle
  44          * @return bool
  45          */
  46         public function do_item( $handle ) {
  47                 if ( !parent::do_item($handle) )
  48                         return false;
  49
  50                 $obj = $this->registered[$handle];
  51                 if ( null === $obj->ver )
  52                         $ver = '';
  53                 else
  54                         $ver = $obj->ver ? $obj->ver : $this->default_version;
  55
  56                 if ( isset($this->args[$handle]) )
  57                         $ver = $ver ? $ver . '&amp;' . $this->args[$handle] : $this->args[$handle];
  58
  59                 if ( $this->do_concat ) {
  60                         if ( $this->in_default_dir($obj->src) && !isset($obj->extra['conditional']) && !isset($obj->extra['alt']) ) {
  61                                 $this->concat .= "$handle,";
  62                                 $this->concat_version .= "$handle$ver";
  63
  64                                 $this->print_code .= $this->print_inline_style( $handle, false );
  65
  66                                 return true;
  67                         }
  68                 }
  69
  70                 if ( isset($obj->args) )
  71                         $media = esc_attr( $obj->args );
  72                 else
  73                         $media = 'all';
  74
  75                 $href = $this->_css_href( $obj->src, $ver, $handle );
  76                 if ( empty( $href ) ) {
  77                         // Turns out there is nothing to print.
  78                         return true;
  79                 }
  80                 $rel = isset($obj->extra['alt']) && $obj->extra['alt'] ? 'alternate stylesheet' : 'stylesheet';
  81                 $title = isset($obj->extra['title']) ? "title='" . esc_attr( $obj->extra['title'] ) . "'" : '';
  82
  83                 /**
  84                  * Filter the HTML link tag of an enqueued style.
  85                  *
  86                  * @since 2.6.0
  87                  * @since 4.3.0 Introduced the `$href` parameter.
  88                  *
  89                  * @param string $html   The link tag for the enqueued style.
  90                  * @param string $handle The style's registered handle.
  91                  * @param string $href   The stylesheet's source URL.
  92                  */
  93                 $tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-css' $title href='$href' type='text/css' media='$media' />\n", $handle, $href );
  94                 if ( 'rtl' === $this->text_direction && isset($obj->extra['rtl']) && $obj->extra['rtl'] ) {
  95                         if ( is_bool( $obj->extra['rtl'] ) || 'replace' === $obj->extra['rtl'] ) {
  96                                 $suffix = isset( $obj->extra['suffix'] ) ? $obj->extra['suffix'] : '';
  97                                 $rtl_href = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $this->_css_href( $obj->src , $ver, "$handle-rtl" ));
  98                         } else {
  99                                 $rtl_href = $this->_css_href( $obj->extra['rtl'], $ver, "$handle-rtl" );
 100                         }
 101
 102                         /** This filter is documented in wp-includes/class.wp-styles.php */
 103                         $rtl_tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-rtl-css' $title href='$rtl_href' type='text/css' media='$media' />\n", $handle, $rtl_href );
 104
 105                         if ( $obj->extra['rtl'] === 'replace' ) {
 106                                 $tag = $rtl_tag;
 107                         } else {
 108                                 $tag .= $rtl_tag;
 109                         }
 110                 }
 111
 112                 $conditional_pre = $conditional_post = '';
 113                 if ( isset( $obj->extra['conditional'] ) && $obj->extra['conditional'] ) {
 114                         $conditional_pre  = "<!--[if {$obj->extra['conditional']}]>\n";
 115                         $conditional_post = "<![endif]-->\n";
 116                 }
 117
 118                 if ( $this->do_concat ) {
 119                         $this->print_html .= $conditional_pre;
 120                         $this->print_html .= $tag;
 121                         if ( $inline_style = $this->print_inline_style( $handle, false ) ) {
 122                                 $this->print_html .= sprintf( "<style id='%s-inline-css' type='text/css'>\n%s\n</style>\n", esc_attr( $handle ), $inline_style );
 123                         }
 124                         $this->print_html .= $conditional_post;
 125                 } else {
 126                         echo $conditional_pre;
 127                         echo $tag;
 128                         $this->print_inline_style( $handle );
 129                         echo $conditional_post;
 130                 }
 131
 132                 return true;
 133         }
 134
 135         /**
 136          * @param string $handle
 137          * @param string $code
 138          */
 139         public function add_inline_style( $handle, $code ) {
 140                 if ( ! $code ) {
 141                         return false;
 142                 }
 143
 144                 $after = $this->get_data( $handle, 'after' );
 145                 if ( ! $after ) {
 146                         $after = array();
 147                 }
 148
 149                 $after[] = $code;
 150
 151                 return $this->add_data( $handle, 'after', $after );
 152         }
 153
 154         /**
 155          * @param string $handle
 156          * @param bool $echo
 157          * @return bool
 158          */
 159         public function print_inline_style( $handle, $echo = true ) {
 160                 $output = $this->get_data( $handle, 'after' );
 161
 162                 if ( empty( $output ) ) {
 163                         return false;
 164                 }
 165
 166                 $output = implode( "\n", $output );
 167
 168                 if ( ! $echo ) {
 169                         return $output;
 170                 }
 171
 172                 printf( "<style id='%s-inline-css' type='text/css'>\n%s\n</style>\n", esc_attr( $handle ), $output );
 173
 174                 return true;
 175         }
 176
 177         /**
 178          * @param mixed $handles
 179          * @param bool $recursion
 180          * @param mixed $group
 181          * @return bool
 182          */
 183         public function all_deps( $handles, $recursion = false, $group = false ) {
 184                 $r = parent::all_deps( $handles, $recursion );
 185                 if ( !$recursion ) {
 186                         /**
 187                          * Filter the array of enqueued styles before processing for output.
 188                          *
 189                          * @since 2.6.0
 190                          *
 191                          * @param array $to_do The list of enqueued styles about to be processed.
 192                          */
 193                         $this->to_do = apply_filters( 'print_styles_array', $this->to_do );
 194                 }
 195                 return $r;
 196         }
 197
 198         /**
 199          * @param string $src
 200          * @param string $ver
 201          * @param string $handle
 202          * @return string
 203          */
 204         public function _css_href( $src, $ver, $handle ) {
 205                 if ( !is_bool($src) && !preg_match('|^(https?:)?//|', $src) && ! ( $this->content_url && 0 === strpos($src, $this->content_url) ) ) {
 206                         $src = $this->base_url . $src;
 207                 }
 208
 209                 if ( !empty($ver) )
 210                         $src = add_query_arg('ver', $ver, $src);
 211
 212                 /**
 213                  * Filter an enqueued style's fully-qualified URL.
 214                  *
 215                  * @since 2.6.0
 216                  *
 217                  * @param string $src    The source URL of the enqueued style.
 218                  * @param string $handle The style's registered handle.
 219                  */
 220                 $src = apply_filters( 'style_loader_src', $src, $handle );
 221                 return esc_url( $src );
 222         }
 223
 224         /**
 225          * @param string $src
 226          * @return bool
 227          */
 228         public function in_default_dir($src) {
 229                 if ( ! $this->default_dirs )
 230                         return true;
 231
 232                 foreach ( (array) $this->default_dirs as $test ) {
 233                         if ( 0 === strpos($src, $test) )
 234                                 return true;
 235                 }
 236                 return false;
 237         }
 238
 239         /**
 240          * @return array
 241          */
 242         public function do_footer_items() { // HTML 5 allows styles in the body, grab late enqueued items and output them in the footer.
 243                 $this->do_items(false, 1);
 244                 return $this->done;
 245         }
 246
 247         /**
 248          * @access public
 249          */
 250         public function reset() {
 251                 $this->do_concat = false;
 252                 $this->concat = '';
 253                 $this->concat_version = '';
 254                 $this->print_html = '';
 255         }
 256 }