WordPress 4.2
[autoinstalls/wordpress.git] / 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 }