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/wp-admin/includes/ -> theme.php (source)

   1  <?php
   2  /**
   3   * WordPress Theme Administration API
   4   *
   5   * @package WordPress
   6   * @subpackage Administration
   7   */
   8  
   9  /**
  10   * Remove a theme
  11   *
  12   * @since 2.8.0
  13   *
  14   * @param string $stylesheet Stylesheet of the theme to delete
  15   * @param string $redirect Redirect to page when complete.
  16   * @return mixed
  17   */
  18  function delete_theme($stylesheet, $redirect = '') {
  19      global $wp_filesystem;
  20  
  21      if ( empty($stylesheet) )
  22          return false;
  23  
  24      ob_start();
  25      if ( empty( $redirect ) )
  26          $redirect = wp_nonce_url('themes.php?action=delete&stylesheet=' . urlencode( $stylesheet ), 'delete-theme_' . $stylesheet);
  27      if ( false === ($credentials = request_filesystem_credentials($redirect)) ) {
  28          $data = ob_get_contents();
  29          ob_end_clean();
  30          if ( ! empty($data) ){
  31              include_once ( ABSPATH . 'wp-admin/admin-header.php');
  32              echo $data;
  33              include ( ABSPATH . 'wp-admin/admin-footer.php');
  34              exit;
  35          }
  36          return;
  37      }
  38  
  39      if ( ! WP_Filesystem($credentials) ) {
  40          request_filesystem_credentials($redirect, '', true); // Failed to connect, Error and request again
  41          $data = ob_get_contents();
  42          ob_end_clean();
  43          if ( ! empty($data) ) {
  44              include_once ( ABSPATH . 'wp-admin/admin-header.php');
  45              echo $data;
  46              include ( ABSPATH . 'wp-admin/admin-footer.php');
  47              exit;
  48          }
  49          return;
  50      }
  51  
  52      if ( ! is_object($wp_filesystem) )
  53          return new WP_Error('fs_unavailable', __('Could not access filesystem.'));
  54  
  55      if ( is_wp_error($wp_filesystem->errors) && $wp_filesystem->errors->get_error_code() )
  56          return new WP_Error('fs_error', __('Filesystem error.'), $wp_filesystem->errors);
  57  
  58      //Get the base plugin folder
  59      $themes_dir = $wp_filesystem->wp_themes_dir();
  60      if ( empty($themes_dir) )
  61          return new WP_Error('fs_no_themes_dir', __('Unable to locate WordPress theme directory.'));
  62  
  63      $themes_dir = trailingslashit( $themes_dir );
  64      $theme_dir = trailingslashit($themes_dir . $stylesheet);
  65      $deleted = $wp_filesystem->delete($theme_dir, true);
  66  
  67      if ( ! $deleted )
  68          return new WP_Error('could_not_remove_theme', sprintf(__('Could not fully remove the theme %s.'), $stylesheet) );
  69  
  70      // Force refresh of theme update information
  71      delete_site_transient('update_themes');
  72  
  73      return true;
  74  }
  75  
  76  /**
  77   * Get the Page Templates available in this theme
  78   *
  79   * @since 1.5.0
  80   *
  81   * @return array Key is the template name, value is the filename of the template
  82   */
  83  function get_page_templates() {
  84      return array_flip( wp_get_theme()->get_page_templates() );
  85  }
  86  
  87  /**
  88   * Tidies a filename for url display by the theme editor.
  89   *
  90   * @since 2.9.0
  91   * @access private
  92   *
  93   * @param string $fullpath Full path to the theme file
  94   * @param string $containingfolder Path of the theme parent folder
  95   * @return string
  96   */
  97  function _get_template_edit_filename($fullpath, $containingfolder) {
  98      return str_replace(dirname(dirname( $containingfolder )) , '', $fullpath);
  99  }
 100  
 101  /**
 102   * Check if there is an update for a theme available.
 103   *
 104   * Will display link, if there is an update available.
 105   *
 106   * @since 2.7.0
 107   * @see get_theme_update_available()
 108   *
 109   * @param object $theme Theme data object.
 110   */
 111  function theme_update_available( $theme ) {
 112      echo get_theme_update_available( $theme );
 113  }
 114  
 115  /**
 116   * Retrieve the update link if there is a theme update available.
 117   *
 118   * Will return a link if there is an update available.
 119   *
 120   * @since 3.8.0
 121   *
 122   * @param WP_Theme $theme WP_Theme object.
 123   * @return string|bool HTML for the update link, or false if invalid info was passed.
 124   */
 125  function get_theme_update_available( $theme ) {
 126      static $themes_update;
 127  
 128      if ( !current_user_can('update_themes' ) )
 129          return false;
 130  
 131      if ( !isset($themes_update) )
 132          $themes_update = get_site_transient('update_themes');
 133  
 134      if ( ! is_a( $theme, 'WP_Theme' ) )
 135          return false;
 136  
 137      $stylesheet = $theme->get_stylesheet();
 138  
 139      $html = '';
 140  
 141      if ( isset($themes_update->response[ $stylesheet ]) ) {
 142          $update = $themes_update->response[ $stylesheet ];
 143          $theme_name = $theme->display('Name');
 144          $details_url = add_query_arg(array('TB_iframe' => 'true', 'width' => 1024, 'height' => 800), $update['url']); //Theme browser inside WP? replace this, Also, theme preview JS will override this on the available list.
 145          $update_url = wp_nonce_url( admin_url( 'update.php?action=upgrade-theme&amp;theme=' . urlencode( $stylesheet ) ), 'upgrade-theme_' . $stylesheet );
 146          $update_onclick = 'onclick="if ( confirm(\'' . esc_js( __("Updating this theme will lose any customizations you have made. 'Cancel' to stop, 'OK' to update.") ) . '\') ) {return true;}return false;"';
 147  
 148          if ( !is_multisite() ) {
 149              if ( ! current_user_can('update_themes') ) {
 150                  $html = sprintf( '<p><strong>' . __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%1$s">View version %3$s details</a>.') . '</strong></p>', $theme_name, $details_url, $update['new_version']);
 151              } else if ( empty( $update['package'] ) ) {
 152                  $html = sprintf( '<p><strong>' . __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%1$s">View version %3$s details</a>. <em>Automatic update is unavailable for this theme.</em>') . '</strong></p>', $theme_name, $details_url, $update['new_version']);
 153              } else {
 154                  $html = sprintf( '<p><strong>' . __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%1$s">View version %3$s details</a> or <a href="%4$s" %5$s>update now</a>.') . '</strong></p>', $theme_name, $details_url, $update['new_version'], $update_url, $update_onclick );
 155              }
 156          }
 157      }
 158  
 159      return $html;
 160  }
 161  
 162  /**
 163   * Retrieve list of WordPress theme features (aka theme tags)
 164   *
 165   * @since 3.1.0
 166   *
 167   * @param bool $api Optional. Whether try to fetch tags from the WP.org API. Defaults to true.
 168   * @return array Array of features keyed by category with translations keyed by slug.
 169   */
 170  function get_theme_feature_list( $api = true ) {
 171      // Hard-coded list is used if api not accessible.
 172      $features = array(
 173              __( 'Colors' ) => array(
 174                  'black'   => __( 'Black' ),
 175                  'blue'    => __( 'Blue' ),
 176                  'brown'   => __( 'Brown' ),
 177                  'gray'    => __( 'Gray' ),
 178                  'green'   => __( 'Green' ),
 179                  'orange'  => __( 'Orange' ),
 180                  'pink'    => __( 'Pink' ),
 181                  'purple'  => __( 'Purple' ),
 182                  'red'     => __( 'Red' ),
 183                  'silver'  => __( 'Silver' ),
 184                  'tan'     => __( 'Tan' ),
 185                  'white'   => __( 'White' ),
 186                  'yellow'  => __( 'Yellow' ),
 187                  'dark'    => __( 'Dark' ),
 188                  'light'   => __( 'Light' ),
 189              ),
 190  
 191          __( 'Columns' ) => array(
 192              'one-column'    => __( 'One Column' ),
 193              'two-columns'   => __( 'Two Columns' ),
 194              'three-columns' => __( 'Three Columns' ),
 195              'four-columns'  => __( 'Four Columns' ),
 196              'left-sidebar'  => __( 'Left Sidebar' ),
 197              'right-sidebar' => __( 'Right Sidebar' ),
 198          ),
 199  
 200          __( 'Layout' ) => array(
 201              'fixed-layout'      => __( 'Fixed Layout' ),
 202              'fluid-layout'      => __( 'Fluid Layout' ),
 203              'responsive-layout' => __( 'Responsive Layout' ),
 204          ),
 205  
 206          __( 'Features' ) => array(
 207              'accessibility-ready'   => __( 'Accessibility Ready' ),
 208              'blavatar'              => __( 'Blavatar' ),
 209              'buddypress'            => __( 'BuddyPress' ),
 210              'custom-background'     => __( 'Custom Background' ),
 211              'custom-colors'         => __( 'Custom Colors' ),
 212              'custom-header'         => __( 'Custom Header' ),
 213              'custom-menu'           => __( 'Custom Menu' ),
 214              'editor-style'          => __( 'Editor Style' ),
 215              'featured-image-header' => __( 'Featured Image Header' ),
 216              'featured-images'       => __( 'Featured Images' ),
 217              'flexible-header'       => __( 'Flexible Header' ),
 218              'front-page-post-form'  => __( 'Front Page Posting' ),
 219              'full-width-template'   => __( 'Full Width Template' ),
 220              'microformats'          => __( 'Microformats' ),
 221              'post-formats'          => __( 'Post Formats' ),
 222              'rtl-language-support'  => __( 'RTL Language Support' ),
 223              'sticky-post'           => __( 'Sticky Post' ),
 224              'theme-options'         => __( 'Theme Options' ),
 225              'threaded-comments'     => __( 'Threaded Comments' ),
 226              'translation-ready'     => __( 'Translation Ready' ),
 227          ),
 228  
 229          __( 'Subject' )  => array(
 230              'holiday'       => __( 'Holiday' ),
 231              'photoblogging' => __( 'Photoblogging' ),
 232              'seasonal'      => __( 'Seasonal' ),
 233          )
 234      );
 235  
 236      if ( ! $api || ! current_user_can( 'install_themes' ) )
 237          return $features;
 238  
 239      if ( !$feature_list = get_site_transient( 'wporg_theme_feature_list' ) )
 240          set_site_transient( 'wporg_theme_feature_list', array(), 10800);
 241  
 242      if ( !$feature_list ) {
 243          $feature_list = themes_api( 'feature_list', array() );
 244          if ( is_wp_error( $feature_list ) )
 245              return $features;
 246      }
 247  
 248      if ( !$feature_list )
 249          return $features;
 250  
 251      set_site_transient( 'wporg_theme_feature_list', $feature_list, 10800 );
 252  
 253      $category_translations = array(
 254          'Colors'   => __( 'Colors' ),
 255          'Columns'  => __( 'Columns' ),
 256          'Layout'   => __( 'Layout' ),
 257          'Features' => __( 'Features' ),
 258          'Subject'  => __( 'Subject' )
 259      );
 260  
 261      // Loop over the wporg canonical list and apply translations
 262      $wporg_features = array();
 263      foreach ( (array) $feature_list as $feature_category => $feature_items ) {
 264          if ( isset($category_translations[$feature_category]) )
 265              $feature_category = $category_translations[$feature_category];
 266          $wporg_features[$feature_category] = array();
 267  
 268          foreach ( $feature_items as $feature ) {
 269              if ( isset($features[$feature_category][$feature]) )
 270                  $wporg_features[$feature_category][$feature] = $features[$feature_category][$feature];
 271              else
 272                  $wporg_features[$feature_category][$feature] = $feature;
 273          }
 274      }
 275  
 276      return $wporg_features;
 277  }
 278  
 279  /**
 280   * Retrieve theme installer pages from WordPress Themes API.
 281   *
 282   * It is possible for a theme to override the Themes API result with three
 283   * filters. Assume this is for themes, which can extend on the Theme Info to
 284   * offer more choices. This is very powerful and must be used with care, when
 285   * overridding the filters.
 286   *
 287   * The first filter, 'themes_api_args', is for the args and gives the action as
 288   * the second parameter. The hook for 'themes_api_args' must ensure that an
 289   * object is returned.
 290   *
 291   * The second filter, 'themes_api', is the result that would be returned.
 292   *
 293   * @since 2.8.0
 294   *
 295   * @param string       $action The requested action. Likely values are 'theme_information',
 296   *                             'feature_list', or 'query_themes'.
 297   * @param array|object $args   Optional. Arguments to serialize for the Theme Info API.
 298   * @return mixed
 299   */
 300  function themes_api( $action, $args = null ) {
 301  
 302      if ( is_array($args) )
 303          $args = (object)$args;
 304  
 305      if ( !isset($args->per_page) )
 306          $args->per_page = 24;
 307      /**
 308       * Filter arguments used to query for installer pages from the WordPress.org Themes API.
 309       *
 310       * Important: An object MUST be returned to this filter.
 311       *
 312       * @since 2.8.0
 313       *
 314       * @param object $args   Arguments used to query for installer pages from the WordPress.org Themes API.
 315       * @param string $action Requested action. Likely values are 'theme_information',
 316       *                       'feature_list', or 'query_themes'.
 317       */
 318      $args = apply_filters( 'themes_api_args', $args, $action );
 319  
 320      /**
 321       * Filter whether to override the WordPress.org Themes API.
 322       *
 323       * Returning a value of true to this filter allows a theme to completely
 324       * override the built-in WordPress.org API.
 325       *
 326       * @since 2.8.0
 327       *
 328       * @param bool   $bool   Whether to override the WordPress.org Themes API. Default false.
 329       * @param string $action Requested action. Likely values are 'theme_information',
 330       *                       'feature_list', or 'query_themes'.
 331       * @param object $args   Arguments used to query for installer pages from the Themes API.
 332       */
 333      $res = apply_filters( 'themes_api', false, $action, $args );
 334  
 335      if ( ! $res ) {
 336          $url = $http_url = 'http://api.wordpress.org/themes/info/1.0/';
 337          if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
 338              $url = set_url_scheme( $url, 'https' );
 339  
 340          $args = array(
 341              'body' => array(
 342                  'action' => $action,
 343                  'request' => serialize( $args )
 344              )
 345          );
 346          $request = wp_remote_post( $url, $args );
 347  
 348          if ( $ssl && is_wp_error( $request ) ) {
 349              trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ) . ' ' . '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)', headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );
 350              $request = wp_remote_post( $http_url, $args );
 351          }
 352  
 353          if ( is_wp_error($request) ) {
 354              $res = new WP_Error('themes_api_failed', __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ), $request->get_error_message() );
 355          } else {
 356              $res = maybe_unserialize( wp_remote_retrieve_body( $request ) );
 357              if ( ! is_object( $res ) && ! is_array( $res ) )
 358                  $res = new WP_Error('themes_api_failed', __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ), wp_remote_retrieve_body( $request ) );
 359          }
 360      }
 361  
 362      /**
 363       * Filter the returned WordPress.org Themes API response.
 364       *
 365       * @since 2.8.0
 366       *
 367       * @param array|object $res    WordPress.org Themes API response.
 368       * @param string       $action Requested action. Likely values are 'theme_information',
 369       *                             'feature_list', or 'query_themes'.
 370       * @param object       $args   Arguments used to query for installer pages from the WordPress.org Themes API.
 371       */
 372      return apply_filters( 'themes_api_result', $res, $action, $args );
 373  }
 374  
 375  /**
 376   * Prepare themes for JavaScript.
 377   *
 378   * @since 3.8.0
 379   *
 380   * @param array $themes Optional. Array of WP_Theme objects to prepare.
 381   *                      Defaults to all allowed themes.
 382   *
 383   * @return array An associative array of theme data, sorted by name.
 384   */
 385  function wp_prepare_themes_for_js( $themes = null ) {
 386      $current_theme = get_stylesheet();
 387  
 388      // Make sure the current theme is listed first.
 389      $prepared_themes = array( $current_theme => array() );
 390  
 391      if ( null === $themes ) {
 392          $themes = wp_get_themes( array( 'allowed' => true ) );
 393          if ( ! isset( $themes[ $current_theme ] ) ) {
 394              $themes[ $current_theme ] = wp_get_theme();
 395          }
 396      }
 397  
 398      $updates = array();
 399      if ( current_user_can( 'update_themes' ) ) {
 400          $updates_transient = get_site_transient( 'update_themes' );
 401          if ( isset( $updates_transient->response ) ) {
 402              $updates = $updates_transient->response;
 403          }
 404      }
 405  
 406      WP_Theme::sort_by_name( $themes );
 407      foreach ( $themes as $theme ) {
 408          $parent = false;
 409          if ( $theme->parent() ) {
 410              $parent = $theme->parent()->display( 'Name' );
 411          }
 412  
 413          $slug = $theme->get_stylesheet();
 414          $encoded_slug = urlencode( $slug );
 415  
 416          $prepared_themes[ $slug ] = array(
 417              'id'           => $slug,
 418              'name'         => $theme->display( 'Name' ),
 419              'screenshot'   => array( $theme->get_screenshot() ), // @todo multiple
 420              'description'  => $theme->display( 'Description' ),
 421              'author'       => $theme->display( 'Author', false, true ),
 422              'authorAndUri' => $theme->display( 'Author' ),
 423              'version'      => $theme->display( 'Version' ),
 424              'tags'         => $theme->display( 'Tags' ),
 425              'parent'       => $parent,
 426              'active'       => $slug === $current_theme,
 427              'hasUpdate'    => isset( $updates[ $slug ] ),
 428              'update'       => get_theme_update_available( $theme ),
 429              'actions'      => array(
 430                  'activate' => current_user_can( 'switch_themes' ) ? wp_nonce_url( admin_url( 'themes.php?action=activate&amp;stylesheet=' . $encoded_slug ), 'switch-theme_' . $slug ) : null,
 431                  'customize'=> current_user_can( 'edit_theme_options' ) ? wp_customize_url( $slug ) : null,
 432                  'preview'   => add_query_arg( array(
 433                      'preview'        => 1,
 434                      'template'       => urlencode( $theme->get_template() ),
 435                      'stylesheet'     => urlencode( $slug ),
 436                      'preview_iframe' => true,
 437                      'TB_iframe'      => true,
 438                  ), home_url( '/' ) ),
 439                  'delete'   => current_user_can( 'delete_themes' ) ? wp_nonce_url( admin_url( 'themes.php?action=delete&amp;stylesheet=' . $encoded_slug ), 'delete-theme_' . $slug ) : null,
 440              ),
 441          );
 442      }
 443  
 444      /**
 445       * Filter the themes prepared for JavaScript, for themes.php.
 446       *
 447       * Could be useful for changing the order, which is by name by default.
 448       *
 449       * @since 3.8.0
 450       *
 451       * @param array $prepared_themes Array of themes.
 452       */
 453      $prepared_themes = apply_filters( 'wp_prepare_themes_for_js', $prepared_themes );
 454      return array_values( $prepared_themes );
 455  }


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