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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 r16
  10   */
  11  
  12  /**
  13   * BackPress Scripts enqueue class.
  14   *
  15   * @package BackPress
  16   * @uses WP_Dependencies
  17   * @since r16
  18   */
  19  class WP_Scripts extends WP_Dependencies {
  20      var $base_url; // Full URL with trailing slash
  21      var $content_url;
  22      var $default_version;
  23      var $in_footer = array();
  24      var $concat = '';
  25      var $concat_version = '';
  26      var $do_concat = false;
  27      var $print_html = '';
  28      var $print_code = '';
  29      var $ext_handles = '';
  30      var $ext_version = '';
  31      var $default_dirs;
  32  
  33  	function __construct() {
  34          $this->init();
  35          add_action( 'init', array( $this, 'init' ), 0 );
  36      }
  37  
  38  	function init() {
  39          do_action_ref_array( 'wp_default_scripts', array(&$this) );
  40      }
  41  
  42      /**
  43       * Prints scripts
  44       *
  45       * Prints the scripts passed to it or the print queue. Also prints all necessary dependencies.
  46       *
  47       * @param mixed $handles (optional) Scripts to be printed. (void) prints queue, (string) prints that script, (array of strings) prints those scripts.
  48       * @param int $group (optional) If scripts were queued in groups prints this group number.
  49       * @return array Scripts that have been printed
  50       */
  51  	function print_scripts( $handles = false, $group = false ) {
  52          return $this->do_items( $handles, $group );
  53      }
  54  
  55      // Deprecated since 3.3, see print_extra_script()
  56  	function print_scripts_l10n( $handle, $echo = true ) {
  57          _deprecated_function( __FUNCTION__, '3.3', 'print_extra_script()' );
  58          return $this->print_extra_script( $handle, $echo );
  59      }
  60  
  61  	function print_extra_script( $handle, $echo = true ) {
  62          if ( !$output = $this->get_data( $handle, 'data' ) )
  63              return;
  64  
  65          if ( !$echo )
  66              return $output;
  67  
  68          echo "<script type='text/javascript'>\n"; // CDATA and type='text/javascript' is not needed for HTML 5
  69          echo "/* <![CDATA[ */\n";
  70          echo "$output\n";
  71          echo "/* ]]> */\n";
  72          echo "</script>\n";
  73  
  74          return true;
  75      }
  76  
  77  	function do_item( $handle, $group = false ) {
  78          if ( !parent::do_item($handle) )
  79              return false;
  80  
  81          if ( 0 === $group && $this->groups[$handle] > 0 ) {
  82              $this->in_footer[] = $handle;
  83              return false;
  84          }
  85  
  86          if ( false === $group && in_array($handle, $this->in_footer, true) )
  87              $this->in_footer = array_diff( $this->in_footer, (array) $handle );
  88  
  89          if ( null === $this->registered[$handle]->ver )
  90              $ver = '';
  91          else
  92              $ver = $this->registered[$handle]->ver ? $this->registered[$handle]->ver : $this->default_version;
  93  
  94          if ( isset($this->args[$handle]) )
  95              $ver = $ver ? $ver . '&amp;' . $this->args[$handle] : $this->args[$handle];
  96  
  97          $src = $this->registered[$handle]->src;
  98  
  99          if ( $this->do_concat ) {
 100              $srce = apply_filters( 'script_loader_src', $src, $handle );
 101              if ( $this->in_default_dir($srce) ) {
 102                  $this->print_code .= $this->print_extra_script( $handle, false );
 103                  $this->concat .= "$handle,";
 104                  $this->concat_version .= "$handle$ver";
 105                  return true;
 106              } else {
 107                  $this->ext_handles .= "$handle,";
 108                  $this->ext_version .= "$handle$ver";
 109              }
 110          }
 111  
 112          $this->print_extra_script( $handle );
 113          if ( !preg_match('|^(https?:)?//|', $src) && ! ( $this->content_url && 0 === strpos($src, $this->content_url) ) ) {
 114              $src = $this->base_url . $src;
 115          }
 116  
 117          if ( !empty($ver) )
 118              $src = add_query_arg('ver', $ver, $src);
 119  
 120          $src = esc_url( apply_filters( 'script_loader_src', $src, $handle ) );
 121  
 122          if ( ! $src )
 123              return true;
 124  
 125          if ( $this->do_concat )
 126              $this->print_html .= "<script type='text/javascript' src='$src'></script>\n";
 127          else
 128              echo "<script type='text/javascript' src='$src'></script>\n";
 129  
 130          return true;
 131      }
 132  
 133      /**
 134       * Localizes a script
 135       *
 136       * Localizes only if the script has already been added
 137       */
 138  	function localize( $handle, $object_name, $l10n ) {
 139          if ( $handle === 'jquery' )
 140              $handle = 'jquery-core';
 141  
 142          if ( is_array($l10n) && isset($l10n['l10n_print_after']) ) { // back compat, preserve the code in 'l10n_print_after' if present
 143              $after = $l10n['l10n_print_after'];
 144              unset($l10n['l10n_print_after']);
 145          }
 146  
 147          foreach ( (array) $l10n as $key => $value ) {
 148              if ( !is_scalar($value) )
 149                  continue;
 150  
 151              $l10n[$key] = html_entity_decode( (string) $value, ENT_QUOTES, 'UTF-8');
 152          }
 153  
 154          $script = "var $object_name = " . json_encode($l10n) . ';';
 155  
 156          if ( !empty($after) )
 157              $script .= "\n$after;";
 158  
 159          $data = $this->get_data( $handle, 'data' );
 160  
 161          if ( !empty( $data ) )
 162              $script = "$data\n$script";
 163  
 164          return $this->add_data( $handle, 'data', $script );
 165      }
 166  
 167  	function set_group( $handle, $recursion, $group = false ) {
 168  
 169          if ( $this->registered[$handle]->args === 1 )
 170              $grp = 1;
 171          else
 172              $grp = (int) $this->get_data( $handle, 'group' );
 173  
 174          if ( false !== $group && $grp > $group )
 175              $grp = $group;
 176  
 177          return parent::set_group( $handle, $recursion, $grp );
 178      }
 179  
 180  	function all_deps( $handles, $recursion = false, $group = false ) {
 181          $r = parent::all_deps( $handles, $recursion );
 182          if ( !$recursion )
 183              $this->to_do = apply_filters( 'print_scripts_array', $this->to_do );
 184          return $r;
 185      }
 186  
 187  	function do_head_items() {
 188          $this->do_items(false, 0);
 189          return $this->done;
 190      }
 191  
 192  	function do_footer_items() {
 193          $this->do_items(false, 1);
 194          return $this->done;
 195      }
 196  
 197  	function in_default_dir($src) {
 198          if ( ! $this->default_dirs )
 199              return true;
 200  
 201          if ( 0 === strpos( $src, '/wp-includes/js/l10n' ) )
 202              return false;
 203  
 204          foreach ( (array) $this->default_dirs as $test ) {
 205              if ( 0 === strpos($src, $test) )
 206                  return true;
 207          }
 208          return false;
 209      }
 210  
 211  	function reset() {
 212          $this->do_concat = false;
 213          $this->print_code = '';
 214          $this->concat = '';
 215          $this->concat_version = '';
 216          $this->print_html = '';
 217          $this->ext_version = '';
 218          $this->ext_handles = '';
 219      }
 220  }