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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 $default_dirs;
  32  
  33  	function __construct() {
  34          do_action_ref_array( 'wp_default_scripts', array(&$this) );
  35      }
  36  
  37      /**
  38       * Prints scripts
  39       *
  40       * Prints the scripts passed to it or the print queue.  Also prints all necessary dependencies.
  41       *
  42       * @param mixed handles (optional) Scripts to be printed.  (void) prints queue, (string) prints that script, (array of strings) prints those scripts.
  43       * @param int group (optional) If scripts were queued in groups prints this group number.
  44       * @return array Scripts that have been printed
  45       */
  46  	function print_scripts( $handles = false, $group = false ) {
  47          return $this->do_items( $handles, $group );
  48      }
  49  
  50  	function print_scripts_l10n( $handle, $echo = true ) {
  51          if ( empty($this->registered[$handle]->extra['l10n']) || empty($this->registered[$handle]->extra['l10n'][0]) || !is_array($this->registered[$handle]->extra['l10n'][1]) )
  52              return false;
  53  
  54          $object_name = $this->registered[$handle]->extra['l10n'][0];
  55  
  56          $data = "var $object_name = {\n";
  57          $eol = '';
  58          foreach ( $this->registered[$handle]->extra['l10n'][1] as $var => $val ) {
  59              if ( 'l10n_print_after' == $var ) {
  60                  $after = $val;
  61                  continue;
  62              }
  63              $data .= "$eol\t$var: \"" . esc_js( $val ) . '"';
  64              $eol = ",\n";
  65          }
  66          $data .= "\n};\n";
  67          $data .= isset($after) ? "$after\n" : '';
  68  
  69          if ( $echo ) {
  70              echo "<script type='text/javascript'>\n";
  71              echo "/* <![CDATA[ */\n";
  72              echo $data;
  73              echo "/* ]]> */\n";
  74              echo "</script>\n";
  75              return true;
  76          } else {
  77              return $data;
  78          }
  79      }
  80  
  81  	function do_item( $handle, $group = false ) {
  82          if ( !parent::do_item($handle) )
  83              return false;
  84  
  85          if ( 0 === $group && $this->groups[$handle] > 0 ) {
  86              $this->in_footer[] = $handle;
  87              return false;
  88          }
  89  
  90          if ( false === $group && in_array($handle, $this->in_footer, true) )
  91              $this->in_footer = array_diff( $this->in_footer, (array) $handle );
  92  
  93          $ver = $this->registered[$handle]->ver ? $this->registered[$handle]->ver : $this->default_version;
  94          if ( isset($this->args[$handle]) )
  95              $ver .= '&amp;' . $this->args[$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_scripts_l10n( $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_scripts_l10n( $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          $src = add_query_arg('ver', $ver, $src);
 118          $src = esc_url(apply_filters( 'script_loader_src', $src, $handle ));
 119  
 120          if ( $this->do_concat )
 121              $this->print_html .= "<script type='text/javascript' src='$src'></script>\n";
 122          else
 123              echo "<script type='text/javascript' src='$src'></script>\n";
 124  
 125          return true;
 126      }
 127  
 128      /**
 129       * Localizes a script
 130       *
 131       * Localizes only if script has already been added
 132       *
 133       * @param string handle Script name
 134       * @param string object_name Name of JS object to hold l10n info
 135       * @param array l10n Array of JS var name => localized string
 136       * @return bool Successful localization
 137       */
 138  	function localize( $handle, $object_name, $l10n ) {
 139          if ( !$object_name || !$l10n )
 140              return false;
 141          return $this->add_data( $handle, 'l10n', array( $object_name, $l10n ) );
 142      }
 143  
 144  	function set_group( $handle, $recursion, $group = false ) {
 145          $grp = isset($this->registered[$handle]->extra['group']) ? (int) $this->registered[$handle]->extra['group'] : 0;
 146          if ( false !== $group && $grp > $group )
 147              $grp = $group;
 148  
 149          return parent::set_group( $handle, $recursion, $grp );
 150      }
 151  
 152  	function all_deps( $handles, $recursion = false, $group = false ) {
 153          $r = parent::all_deps( $handles, $recursion );
 154          if ( !$recursion )
 155              $this->to_do = apply_filters( 'print_scripts_array', $this->to_do );
 156          return $r;
 157      }
 158  
 159  	function do_head_items() {
 160          $this->do_items(false, 0);
 161          return $this->done;
 162      }
 163  
 164  	function do_footer_items() {
 165          if ( !empty($this->in_footer) ) {
 166              foreach( $this->in_footer as $key => $handle ) {
 167                  if ( !in_array($handle, $this->done, true) && isset($this->registered[$handle]) ) {
 168                      $this->do_item($handle);
 169                      $this->done[] = $handle;
 170                      unset( $this->in_footer[$key] );
 171                  }
 172              }
 173          }
 174          return $this->done;
 175      }
 176  
 177  	function in_default_dir($src) {
 178          if ( ! $this->default_dirs )
 179              return true;
 180  
 181          foreach ( (array) $this->default_dirs as $test ) {
 182              if ( 0 === strpos($src, $test) )
 183                  return true;
 184          }
 185          return false;
 186      }
 187  
 188  	function reset() {
 189          $this->do_concat = false;
 190          $this->print_code = '';
 191          $this->concat = '';
 192          $this->concat_version = '';
 193          $this->print_html = '';
 194          $this->ext_version = '';
 195          $this->ext_handles = '';
 196      }
 197  }