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WordPress 3.4.2-scripts
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1 <?php
2 /**
3  * BackPress Scripts 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 enqueued dependiences class.
14  *
15  * @package BackPress
16  * @uses _WP_Dependency
17  * @since r74
18  */
19 class WP_Dependencies {
20         var $registered = array();
21         var $queue = array();
22         var $to_do = array();
23         var $done = array();
24         var $args = array();
25         var $groups = array();
26         var $group = 0;
27
28         /**
29          * Do the dependencies
30          *
31          * Process the items passed to it or the queue. Processes all dependencies.
32          *
33          * @param mixed $handles (optional) items to be processed. (void) processes queue, (string) process that item, (array of strings) process those items
34          * @return array Items that have been processed
35          */
36         function do_items( $handles = false, $group = false ) {
37                 // Print the queue if nothing is passed. If a string is passed, print that script. If an array is passed, print those scripts.
38                 $handles = false === $handles ? $this->queue : (array) $handles;
39                 $this->all_deps( $handles );
40
41                 foreach( $this->to_do as $key => $handle ) {
42                         if ( !in_array($handle, $this->done, true) && isset($this->registered[$handle]) ) {
43
44                                 if ( ! $this->registered[$handle]->src ) { // Defines a group.
45                                         $this->done[] = $handle;
46                                         continue;
47                                 }
48
49                                 if ( $this->do_item( $handle, $group ) )
50                                         $this->done[] = $handle;
51
52                                 unset( $this->to_do[$key] );
53                         }
54                 }
55
56                 return $this->done;
57         }
58
59         function do_item( $handle ) {
60                 return isset($this->registered[$handle]);
61         }
62
63         /**
64          * Determines dependencies
65          *
66          * Recursively builds array of items to process taking dependencies into account. Does NOT catch infinite loops.
67          *
68          *
69          * @param mixed $handles Accepts (string) dep name or (array of strings) dep names
70          * @param bool $recursion Used internally when function calls itself
71          */
72         function all_deps( $handles, $recursion = false, $group = false ) {
73                 if ( !$handles = (array) $handles )
74                         return false;
75
76                 foreach ( $handles as $handle ) {
77                         $handle_parts = explode('?', $handle);
78                         $handle = $handle_parts[0];
79                         $queued = in_array($handle, $this->to_do, true);
80
81                         if ( in_array($handle, $this->done, true) ) // Already done
82                                 continue;
83
84                         $moved = $this->set_group( $handle, $recursion, $group );
85
86                         if ( $queued && !$moved ) // already queued and in the right group
87                                 continue;
88
89                         $keep_going = true;
90                         if ( !isset($this->registered[$handle]) )
91                                 $keep_going = false; // Script doesn't exist
92                         elseif ( $this->registered[$handle]->deps && array_diff($this->registered[$handle]->deps, array_keys($this->registered)) )
93                                 $keep_going = false; // Script requires deps which don't exist (not a necessary check. efficiency?)
94                         elseif ( $this->registered[$handle]->deps && !$this->all_deps( $this->registered[$handle]->deps, true, $group ) )
95                                 $keep_going = false; // Script requires deps which don't exist
96
97                         if ( !$keep_going ) { // Either script or its deps don't exist.
98                                 if ( $recursion )
99                                         return false; // Abort this branch.
100                                 else
101                                         continue; // We're at the top level. Move on to the next one.
102                         }
103
104                         if ( $queued ) // Already grobbed it and its deps
105                                 continue;
106
107                         if ( isset($handle_parts[1]) )
108                                 $this->args[$handle] = $handle_parts[1];
109
110                         $this->to_do[] = $handle;
111                 }
112
113                 return true;
114         }
115
116         /**
117          * Adds item
118          *
119          * Adds the item only if no item of that name already exists
120          *
121          * @param string $handle Script name
122          * @param string $src Script url
123          * @param array $deps (optional) Array of script names on which this script depends
124          * @param string $ver (optional) Script version (used for cache busting)
125          * @return array Hierarchical array of dependencies
126          */
127         function add( $handle, $src, $deps = array(), $ver = false, $args = null ) {
128                 if ( isset($this->registered[$handle]) )
129                         return false;
130                 $this->registered[$handle] = new _WP_Dependency( $handle, $src, $deps, $ver, $args );
131                 return true;
132         }
133
134         /**
135          * Adds extra data
136          *
137          * Adds data only if script has already been added.
138          *
139          * @param string $handle Script name
140          * @param string $key
141          * @param mixed $value
142          * @return bool success
143          */
144         function add_data( $handle, $key, $value ) {
145                 if ( !isset( $this->registered[$handle] ) )
146                         return false;
147
148                 return $this->registered[$handle]->add_data( $key, $value );
149         }
150
151         /**
152          * Get extra data
153          *
154          * Gets data associated with a certain handle.
155          *
156          * @since WP 3.3
157          *
158          * @param string $handle Script name
159          * @param string $key
160          * @return mixed
161          */
162         function get_data( $handle, $key ) {
163                 if ( !isset( $this->registered[$handle] ) )
164                         return false;
165
166                 if ( !isset( $this->registered[$handle]->extra[$key] ) )
167                         return false;
168
169                 return $this->registered[$handle]->extra[$key];
170         }
171
172         function remove( $handles ) {
173                 foreach ( (array) $handles as $handle )
174                         unset($this->registered[$handle]);
175         }
176
177         function enqueue( $handles ) {
178                 foreach ( (array) $handles as $handle ) {
179                         $handle = explode('?', $handle);
180                         if ( !in_array($handle[0], $this->queue) && isset($this->registered[$handle[0]]) ) {
181                                 $this->queue[] = $handle[0];
182                                 if ( isset($handle[1]) )
183                                         $this->args[$handle[0]] = $handle[1];
184                         }
185                 }
186         }
187
188         function dequeue( $handles ) {
189                 foreach ( (array) $handles as $handle ) {
190                         $handle = explode('?', $handle);
191                         $key = array_search($handle[0], $this->queue);
192                         if ( false !== $key ) {
193                                 unset($this->queue[$key]);
194                                 unset($this->args[$handle[0]]);
195                         }
196                 }
197         }
198
199         function query( $handle, $list = 'registered' ) { // registered, queue, done, to_do
200                 switch ( $list ) :
201                 case 'registered':
202                 case 'scripts': // back compat
203                         if ( isset($this->registered[$handle]) )
204                                 return $this->registered[$handle];
205                         break;
206                 case 'to_print': // back compat
207                 case 'printed': // back compat
208                         if ( 'to_print' == $list )
209                                 $list = 'to_do';
210                         else
211                                 $list = 'printed';
212                 default:
213                         if ( in_array($handle, $this->$list) )
214                                 return true;
215                         break;
216                 endswitch;
217                 return false;
218         }
219
220         function set_group( $handle, $recursion, $group ) {
221                 $group = (int) $group;
222
223                 if ( $recursion )
224                         $group = min($this->group, $group);
225                 else
226                         $this->group = $group;
227
228                 if ( isset($this->groups[$handle]) && $this->groups[$handle] <= $group )
229                         return false;
230
231                 $this->groups[$handle] = $group;
232                 return true;
233         }
234
235 }
236
237 class _WP_Dependency {
238         var $handle;
239         var $src;
240         var $deps = array();
241         var $ver = false;
242         var $args = null;
243
244         var $extra = array();
245
246         function __construct() {
247                 @list($this->handle, $this->src, $this->deps, $this->ver, $this->args) = func_get_args();
248                 if ( !is_array($this->deps) )
249                         $this->deps = array();
250         }
251
252         function add_data( $name, $data ) {
253                 if ( !is_scalar($name) )
254                         return false;
255                 $this->extra[$name] = $data;
256                 return true;
257         }
258 }