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                  *
  88                  * @param string         The link tag for the enqueued style.
  89                  * @param string $handle The style's registered handle.
  90                  */
  91                 $tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-css' $title href='$href' type='text/css' media='$media' />\n", $handle );
  92                 if ( 'rtl' === $this->text_direction && isset($obj->extra['rtl']) && $obj->extra['rtl'] ) {
  93                         if ( is_bool( $obj->extra['rtl'] ) || 'replace' === $obj->extra['rtl'] ) {
  94                                 $suffix = isset( $obj->extra['suffix'] ) ? $obj->extra['suffix'] : '';
  95                                 $rtl_href = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $this->_css_href( $obj->src , $ver, "$handle-rtl" ));
  96                         } else {
  97                                 $rtl_href = $this->_css_href( $obj->extra['rtl'], $ver, "$handle-rtl" );
  98                         }
  99
 100                         /** This filter is documented in wp-includes/class.wp-styles.php */
 101                         $rtl_tag = apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-rtl-css' $title href='$rtl_href' type='text/css' media='$media' />\n", $handle );
 102
 103                         if ( $obj->extra['rtl'] === 'replace' ) {
 104                                 $tag = $rtl_tag;
 105                         } else {
 106                                 $tag .= $rtl_tag;
 107                         }
 108                 }
 109
 110                 $conditional_pre = $conditional_post = '';
 111                 if ( isset( $obj->extra['conditional'] ) && $obj->extra['conditional'] ) {
 112                         $conditional_pre  = "<!--[if {$obj->extra['conditional']}]>\n";
 113                         $conditional_post = "<![endif]-->\n";
 114                 }
 115
 116                 if ( $this->do_concat ) {
 117                         $this->print_html .= $conditional_pre;
 118                         $this->print_html .= $tag;
 119                         if ( $inline_style = $this->print_inline_style( $handle, false ) ) {
 120                                 $this->print_html .= sprintf( "<style id='%s-inline-css' type='text/css'>\n%s\n</style>\n", esc_attr( $handle ), $inline_style );
 121                         }
 122                         $this->print_html .= $conditional_post;
 123                 } else {
 124                         echo $conditional_pre;
 125                         echo $tag;
 126                         $this->print_inline_style( $handle );
 127                         echo $conditional_post;
 128                 }
 129
 130                 return true;
 131         }
 132
 133         /**
 134          * @param string $handle
 135          * @param string $code
 136          */
 137         public function add_inline_style( $handle, $code ) {
 138                 if ( ! $code ) {
 139                         return false;
 140                 }
 141
 142                 $after = $this->get_data( $handle, 'after' );
 143                 if ( ! $after ) {
 144                         $after = array();
 145                 }
 146
 147                 $after[] = $code;
 148
 149                 return $this->add_data( $handle, 'after', $after );
 150         }
 151
 152         /**
 153          * @param string $handle
 154          * @param bool $echo
 155          * @return bool
 156          */
 157         public function print_inline_style( $handle, $echo = true ) {
 158                 $output = $this->get_data( $handle, 'after' );
 159
 160                 if ( empty( $output ) ) {
 161                         return false;
 162                 }
 163
 164                 $output = implode( "\n", $output );
 165
 166                 if ( ! $echo ) {
 167                         return $output;
 168                 }
 169
 170                 printf( "<style id='%s-inline-css' type='text/css'>\n%s\n</style>\n", esc_attr( $handle ), $output );
 171
 172                 return true;
 173         }
 174
 175         /**
 176          * @param mixed $handles
 177          * @param bool $recursion
 178          * @param mixed $group
 179          * @return bool
 180          */
 181         public function all_deps( $handles, $recursion = false, $group = false ) {
 182                 $r = parent::all_deps( $handles, $recursion );
 183                 if ( !$recursion ) {
 184                         /**
 185                          * Filter the array of enqueued styles before processing for output.
 186                          *
 187                          * @since 2.6.0
 188                          *
 189                          * @param array $to_do The list of enqueued styles about to be processed.
 190                          */
 191                         $this->to_do = apply_filters( 'print_styles_array', $this->to_do );
 192                 }
 193                 return $r;
 194         }
 195
 196         /**
 197          * @param string $src
 198          * @param string $ver
 199          * @param string $handle
 200          * @return string
 201          */
 202         public function _css_href( $src, $ver, $handle ) {
 203                 if ( !is_bool($src) && !preg_match('|^(https?:)?//|', $src) && ! ( $this->content_url && 0 === strpos($src, $this->content_url) ) ) {
 204                         $src = $this->base_url . $src;
 205                 }
 206
 207                 if ( !empty($ver) )
 208                         $src = add_query_arg('ver', $ver, $src);
 209
 210                 /**
 211                  * Filter an enqueued style's fully-qualified URL.
 212                  *
 213                  * @since 2.6.0
 214                  *
 215                  * @param string $src    The source URL of the enqueued style.
 216                  * @param string $handle The style's registered handle.
 217                  */
 218                 $src = apply_filters( 'style_loader_src', $src, $handle );
 219                 return esc_url( $src );
 220         }
 221
 222         /**
 223          * @param string $src
 224          * @return bool
 225          */
 226         public function in_default_dir($src) {
 227                 if ( ! $this->default_dirs )
 228                         return true;
 229
 230                 foreach ( (array) $this->default_dirs as $test ) {
 231                         if ( 0 === strpos($src, $test) )
 232                                 return true;
 233                 }
 234                 return false;
 235         }
 236
 237         public function do_footer_items() { // HTML 5 allows styles in the body, grab late enqueued items and output them in the footer.
 238                 $this->do_items(false, 1);
 239                 return $this->done;
 240         }
 241
 242         public function reset() {
 243                 $this->do_concat = false;
 244                 $this->concat = '';
 245                 $this->concat_version = '';
 246                 $this->print_html = '';
 247         }
 248 }