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/files/ -> renderer.php (source)
   1  <?php
   2  ///////////////////////////////////////////////////////////////////////////
   3  //                                                                       //
   4  // This file is part of Moodle - http://moodle.org/                      //
   5  // Moodle - Modular Object-Oriented Dynamic Learning Environment         //
   6  //                                                                       //
   7  // Moodle is free software: you can redistribute it and/or modify        //
   8  // it under the terms of the GNU General Public License as published by  //
   9  // the Free Software Foundation, either version 3 of the License, or     //
  10  // (at your option) any later version.                                   //
  11  //                                                                       //
  12  // Moodle is distributed in the hope that it will be useful,             //
  13  // but WITHOUT ANY WARRANTY; without even the implied warranty of        //
  14  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         //
  15  // GNU General Public License for more details.                          //
  16  //                                                                       //
  17  // You should have received a copy of the GNU General Public License     //
  18  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.       //
  19  //                                                                       //
  20  ///////////////////////////////////////////////////////////////////////////
  21  
  22  defined('MOODLE_INTERNAL') || die();
  23  
  24  /**
  25   * Rendering of files viewer related widgets.
  26   * @package   core
  27   * @subpackage file
  28   * @copyright 2010 Dongsheng Cai
  29   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  30   * @since     Moodle 2.0
  31   */
  32  
  33  /**
  34   * File browser render
  35   *
  36   * @copyright 2010 Dongsheng Cai
  37   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  38   * @since     Moodle 2.0
  39   */
  40  class core_files_renderer extends plugin_renderer_base {
  41  
  42      public function files_tree_viewer(file_info $file_info, array $options = null) {
  43          $tree = new files_tree_viewer($file_info, $options);
  44          return $this->render($tree);
  45      }
  46  
  47      public function render_files_tree_viewer(files_tree_viewer $tree) {
  48          $html = $this->output->heading_with_help(get_string('coursefiles'), 'courselegacyfiles', 'moodle');
  49  
  50          $html .= $this->output->container_start('coursefilesbreadcrumb');
  51          foreach($tree->path as $path) {
  52              $html .= $path;
  53              $html .= ' / ';
  54          }
  55          $html .= $this->output->container_end();
  56  
  57          $html .= $this->output->box_start();
  58          $table = new html_table();
  59          $table->head = array(get_string('name'), get_string('lastmodified'), get_string('size', 'repository'), get_string('type', 'repository'));
  60          $table->align = array('left', 'left', 'left', 'left');
  61          $table->width = '100%';
  62          $table->data = array();
  63  
  64          foreach ($tree->tree as $file) {
  65              $filedate = $filesize = $filetype = '';
  66              if ($file['filedate']) {
  67                  $filedate = userdate($file['filedate'], get_string('strftimedatetimeshort', 'langconfig'));
  68              }
  69              if (empty($file['isdir'])) {
  70                  if ($file['filesize']) {
  71                      $filesize = display_size($file['filesize']);
  72                  }
  73                  $fileicon = file_file_icon($file, 24);
  74                  $filetype = get_mimetype_description($file);
  75              } else {
  76                  $fileicon = file_folder_icon(24);
  77              }
  78              $table->data[] = array(
  79                  html_writer::link($file['url'], $this->output->pix_icon($fileicon, get_string('icon')) . ' ' . $file['filename']),
  80                  $filedate,
  81                  $filesize,
  82                  $filetype
  83                  );
  84          }
  85  
  86          $html .= html_writer::table($table);
  87          $html .= $this->output->single_button(new moodle_url('/files/coursefilesedit.php', array('contextid'=>$tree->context->id)), get_string('coursefilesedit'), 'get');
  88          $html .= $this->output->box_end();
  89          return $html;
  90      }
  91  
  92      /**
  93       * Prints the file manager and initializes all necessary libraries
  94       *
  95       * <pre>
  96       * $fm = new form_filemanager($options);
  97       * $output = get_renderer('core', 'files');
  98       * echo $output->render($fm);
  99       * </pre>
 100       *
 101       * @param form_filemanager $fm File manager to render
 102       * @return string HTML fragment
 103       */
 104      public function render_form_filemanager($fm) {
 105          $html = $this->fm_print_generallayout($fm);
 106          $module = array(
 107              'name'=>'form_filemanager',
 108              'fullpath'=>'/lib/form/filemanager.js',
 109              'requires' => array('moodle-core-notification-dialogue', 'core_filepicker', 'base', 'io-base', 'node', 'json', 'core_dndupload', 'panel', 'resize-plugin', 'dd-plugin'),
 110              'strings' => array(
 111                  array('error', 'moodle'), array('info', 'moodle'), array('confirmdeletefile', 'repository'),
 112                  array('draftareanofiles', 'repository'), array('entername', 'repository'), array('enternewname', 'repository'),
 113                  array('invalidjson', 'repository'), array('popupblockeddownload', 'repository'),
 114                  array('unknownoriginal', 'repository'), array('confirmdeletefolder', 'repository'),
 115                  array('confirmdeletefilewithhref', 'repository'), array('confirmrenamefolder', 'repository'),
 116                  array('confirmrenamefile', 'repository'), array('newfolder', 'repository'), array('edit', 'moodle')
 117              )
 118          );
 119          if ($this->page->requires->should_create_one_time_item_now('core_file_managertemplate')) {
 120              $this->page->requires->js_init_call('M.form_filemanager.set_templates',
 121                      array($this->filemanager_js_templates()), true, $module);
 122          }
 123          $this->page->requires->js_init_call('M.form_filemanager.init', array($fm->options), true, $module);
 124  
 125          // non javascript file manager
 126          $html .= '<noscript>';
 127          $html .= "<div><object type='text/html' data='".$fm->get_nonjsurl()."' height='160' width='600' style='border:1px solid #000'></object></div>";
 128          $html .= '</noscript>';
 129  
 130  
 131          return $html;
 132      }
 133  
 134      /**
 135       * Returns html for displaying one file manager
 136       *
 137       * The main element in HTML must have id="filemanager-{$client_id}" and
 138       * class="filemanager fm-loading";
 139       * After all necessary code on the page (both html and javascript) is loaded,
 140       * the class fm-loading will be removed and added class fm-loaded;
 141       * The main element (class=filemanager) will be assigned the following classes:
 142       * 'fm-maxfiles' - when filemanager has maximum allowed number of files;
 143       * 'fm-nofiles' - when filemanager has no files at all (although there might be folders);
 144       * 'fm-noitems' - when current view (folder) has no items - neither files nor folders;
 145       * 'fm-updating' - when current view is being updated (usually means that loading icon is to be displayed);
 146       * 'fm-nomkdir' - when 'Make folder' action is unavailable (empty($fm->options->subdirs) == true)
 147       *
 148       * Element with class 'filemanager-container' will be holding evens for dnd upload (dragover, etc.).
 149       * It will have class:
 150       * 'dndupload-ready' - when a file is being dragged over the browser
 151       * 'dndupload-over' - when file is being dragged over this filepicker (additional to 'dndupload-ready')
 152       * 'dndupload-uploading' - during the upload process (note that after dnd upload process is
 153       * over, the file manager will refresh the files list and therefore will have for a while class
 154       * fm-updating. Both waiting processes should look similar so the images don't jump for user)
 155       *
 156       * If browser supports Drag-and-drop, the body element will have class 'dndsupported',
 157       * otherwise - 'dndnotsupported';
 158       *
 159       * Element with class 'fp-content' will be populated with files list;
 160       * Element with class 'fp-btn-add' will hold onclick event for adding a file (opening filepicker);
 161       * Element with class 'fp-btn-mkdir' will hold onclick event for adding new folder;
 162       * Element with class 'fp-btn-download' will hold onclick event for download action;
 163       *
 164       * Element with class 'fp-path-folder' is a template for one folder in path toolbar.
 165       * It will hold mouse click event and will be assigned classes first/last/even/odd respectfully.
 166       * Parent element will receive class 'empty' when there are no folders to be displayed;
 167       * The content of subelement with class 'fp-path-folder-name' will be substituted with folder name;
 168       *
 169       * Element with class 'fp-viewbar' will have the class 'enabled' or 'disabled' when view mode
 170       * can be changed or not;
 171       * Inside element with class 'fp-viewbar' there are expected elements with classes
 172       * 'fp-vb-icons', 'fp-vb-tree' and 'fp-vb-details'. They will handle onclick events to switch
 173       * between the view modes, the last clicked element will have the class 'checked';
 174       *
 175       * @param form_filemanager $fm
 176       * @return string
 177       */
 178      private function fm_print_generallayout($fm) {
 179          global $OUTPUT;
 180          $options = $fm->options;
 181          $client_id = $options->client_id;
 182          $straddfile  = get_string('addfile', 'repository');
 183          $strmakedir  = get_string('makeafolder', 'moodle');
 184          $strdownload = get_string('downloadfolder', 'repository');
 185          $strloading  = get_string('loading', 'repository');
 186          $strdroptoupload = get_string('droptoupload', 'moodle');
 187          $icon_progress = $OUTPUT->pix_icon('i/loading_small', $strloading).'';
 188          $restrictions = $this->fm_print_restrictions($fm);
 189          $strdndnotsupported = get_string('dndnotsupported_insentence', 'moodle').$OUTPUT->help_icon('dndnotsupported');
 190          $strdndenabledinbox = get_string('dndenabled_inbox', 'moodle');
 191          $loading = get_string('loading', 'repository');
 192          $straddfiletext = get_string('addfiletext', 'repository');
 193          $strcreatefolder = get_string('createfolder', 'repository');
 194          $strdownloadallfiles = get_string('downloadallfiles', 'repository');
 195  
 196          $html = '
 197  <div id="filemanager-'.$client_id.'" class="filemanager fm-loading">
 198      <div class="fp-restrictions">
 199          '.$restrictions.'
 200          <span class="dnduploadnotsupported-message"> - '.$strdndnotsupported.' </span>
 201      </div>
 202      <div class="fp-navbar">
 203          <div class="filemanager-toolbar">
 204              <div class="fp-toolbar">
 205                  <div class="fp-btn-add">
 206                      <a role="button" title="' . $straddfile . '" href="#">
 207                          <img src="' . $this->pix_url('a/add_file') . '" alt="' . $straddfiletext . '" />
 208                      </a>
 209                  </div>
 210                  <div class="fp-btn-mkdir">
 211                      <a role="button" title="' . $strmakedir . '" href="#">
 212                          <img src="' . $this->pix_url('a/create_folder') . '" alt="' . $strcreatefolder . '" />
 213                      </a>
 214                  </div>
 215                  <div class="fp-btn-download">
 216                      <a role="button" title="' . $strdownload . '" href="#">
 217                          <img src="' . $this->pix_url('a/download_all').'" alt="' . $strdownloadallfiles . '" />
 218                      </a>
 219                  </div>
 220                  <img class="fp-img-downloading" src="'.$this->pix_url('i/loading_small').'" alt="" />
 221              </div>
 222              <div class="fp-viewbar">
 223                  <a title="'. get_string('displayicons', 'repository') .'" class="fp-vb-icons" href="#">
 224                      <img alt="'. get_string('displayasicons', 'repository') .'" src="'. $this->pix_url('fp/view_icon_active', 'theme') .'" />
 225                  </a>
 226                  <a title="'. get_string('displaydetails', 'repository') .'" class="fp-vb-details" href="#">
 227                      <img alt="'. get_string('displayasdetails', 'repository') .'" src="'. $this->pix_url('fp/view_list_active', 'theme') .'" />
 228                  </a>
 229                  <a title="'. get_string('displaytree', 'repository') .'" class="fp-vb-tree" href="#">
 230                      <img alt="'. get_string('displayastree', 'repository') .'" src="'. $this->pix_url('fp/view_tree_active', 'theme') .'" />
 231                  </a>
 232              </div>
 233          </div>
 234          <div class="fp-pathbar">
 235              <span class="fp-path-folder"><a class="fp-path-folder-name" href="#"></a></span>
 236          </div>
 237      </div>
 238      <div class="filemanager-loading mdl-align">'.$icon_progress.'</div>
 239      <div class="filemanager-container" >
 240          <div class="fm-content-wrapper">
 241              <div class="fp-content"></div>
 242              <div class="fm-empty-container">
 243                  <div class="dndupload-message">'.$strdndenabledinbox.'<br/><div class="dndupload-arrow"></div></div>
 244              </div>
 245              <div class="dndupload-target">'.$strdroptoupload.'<br/><div class="dndupload-arrow"></div></div>
 246              <div class="dndupload-progressbars"></div>
 247              <div class="dndupload-uploadinprogress">'.$icon_progress.'</div>
 248          </div>
 249          <div class="filemanager-updating">'.$icon_progress.'</div>
 250      </div>
 251  </div>';
 252          return $html;
 253      }
 254  
 255      /**
 256       * FileManager JS template for displaying one file in 'icon view' mode.
 257       *
 258       * Except for elements described in fp_js_template_iconfilename, this template may also
 259       * contain element with class 'fp-contextmenu'. If context menu is available for this
 260       * file, the top element will receive the additional class 'fp-hascontextmenu' and
 261       * the element with class 'fp-contextmenu' will hold onclick event for displaying
 262       * the context menu.
 263       *
 264       * @see fp_js_template_iconfilename()
 265       * @return string
 266       */
 267      private function fm_js_template_iconfilename() {
 268          $rv = '
 269  <div class="fp-file">
 270      <a href="#">
 271      <div style="position:relative;">
 272          <div class="fp-thumbnail"></div>
 273          <div class="fp-reficons1"></div>
 274          <div class="fp-reficons2"></div>
 275      </div>
 276      <div class="fp-filename-field">
 277          <div class="fp-filename"></div>
 278      </div>
 279      </a>
 280      <a class="fp-contextmenu" href="#">'.$this->pix_icon('i/menu', '▶').'</a>
 281  </div>';
 282          return $rv;
 283      }
 284  
 285      /**
 286       * FileManager JS template for displaying file name in 'table view' and 'tree view' modes.
 287       *
 288       * Except for elements described in fp_js_template_listfilename, this template may also
 289       * contain element with class 'fp-contextmenu'. If context menu is available for this
 290       * file, the top element will receive the additional class 'fp-hascontextmenu' and
 291       * the element with class 'fp-contextmenu' will hold onclick event for displaying
 292       * the context menu.
 293       *
 294       * @todo MDL-32736 remove onclick="return false;"
 295       * @see fp_js_template_listfilename()
 296       * @return string
 297       */
 298      private function fm_js_template_listfilename() {
 299          $rv = '
 300  <span class="fp-filename-icon">
 301      <a href="#">
 302      <span class="fp-icon"></span>
 303      <span class="fp-reficons1"></span>
 304      <span class="fp-reficons2"></span>
 305      <span class="fp-filename"></span>
 306      </a>
 307      <a class="fp-contextmenu" href="#" onclick="return false;">'.$this->pix_icon('i/menu', '▶').'</a>
 308  </span>';
 309          return $rv;
 310      }
 311  
 312      /**
 313       * FileManager JS template for displaying 'Make new folder' dialog.
 314       *
 315       * Must be wrapped in an element, CSS for this element must define width and height of the window;
 316       *
 317       * Must have one input element with type="text" (for users to enter the new folder name);
 318       *
 319       * content of element with class 'fp-dlg-curpath' will be replaced with current path where
 320       * new folder is about to be created;
 321       * elements with classes 'fp-dlg-butcreate' and 'fp-dlg-butcancel' will hold onclick events;
 322       *
 323       * @return string
 324       */
 325      private function fm_js_template_mkdir() {
 326          $rv = '
 327  <div class="filemanager fp-mkdir-dlg" role="dialog" aria-live="assertive" aria-labelledby="fp-mkdir-dlg-title">
 328      <div class="fp-mkdir-dlg-text">
 329          <label id="fp-mkdir-dlg-title">' . get_string('newfoldername', 'repository') . '</label><br/>
 330          <input type="text" />
 331      </div>
 332      <button class="fp-dlg-butcreate btn-primary btn">'.get_string('makeafolder').'</button>
 333      <button class="fp-dlg-butcancel btn-cancel btn">'.get_string('cancel').'</button>
 334  </div>';
 335          return $rv;
 336      }
 337  
 338      /**
 339       * FileManager JS template for error/info message displayed as a separate popup window.
 340       *
 341       * @see fp_js_template_message()
 342       * @return string
 343       */
 344      private function fm_js_template_message() {
 345          return $this->fp_js_template_message();
 346      }
 347  
 348      /**
 349       * FileManager JS template for window with file information/actions.
 350       *
 351       * All content must be enclosed in one element, CSS for this class must define width and
 352       * height of the window;
 353       *
 354       * Thumbnail image will be added as content to the element with class 'fp-thumbnail';
 355       *
 356       * Inside the window the elements with the following classnames must be present:
 357       * 'fp-saveas', 'fp-author', 'fp-license', 'fp-path'. Inside each of them must be
 358       * one input element (or select in case of fp-license and fp-path). They may also have labels.
 359       * The elements will be assign with class 'uneditable' and input/select element will become
 360       * disabled if they are not applicable for the particular file;
 361       *
 362       * There may be present elements with classes 'fp-original', 'fp-datemodified', 'fp-datecreated',
 363       * 'fp-size', 'fp-dimensions', 'fp-reflist'. They will receive additional class 'fp-unknown' if
 364       * information is unavailable. If there is information available, the content of embedded
 365       * element with class 'fp-value' will be substituted with the value;
 366       *
 367       * The value of Original ('fp-original') is loaded in separate request. When it is applicable
 368       * but not yet loaded the 'fp-original' element receives additional class 'fp-loading';
 369       *
 370       * The value of 'Aliases/Shortcuts' ('fp-reflist') is also loaded in separate request. When it
 371       * is applicable but not yet loaded the 'fp-original' element receives additional class
 372       * 'fp-loading'. The string explaining that XX references exist will replace content of element
 373       * 'fp-refcount'. Inside '.fp-reflist .fp-value' each reference will be enclosed in <li>;
 374       *
 375       * Elements with classes 'fp-file-update', 'fp-file-download', 'fp-file-delete', 'fp-file-zip',
 376       * 'fp-file-unzip', 'fp-file-setmain' and 'fp-file-cancel' will hold corresponding onclick
 377       * events (there may be several elements with class 'fp-file-cancel');
 378       *
 379       * When confirm button is pressed and file is being selected, the top element receives
 380       * additional class 'loading'. It is removed when response from server is received.
 381       *
 382       * When any of the input fields is changed, the top element receives class 'fp-changed';
 383       * When current file can be set as main - top element receives class 'fp-cansetmain';
 384       * When current file is folder/zip/file - top element receives respectfully class
 385       * 'fp-folder'/'fp-zip'/'fp-file';
 386       *
 387       * @return string
 388       */
 389      private function fm_js_template_fileselectlayout() {
 390          global $OUTPUT;
 391          $strloading  = get_string('loading', 'repository');
 392          $iconprogress = $this->pix_icon('i/loading_small', $strloading).'';
 393          $rv = '
 394  <div class="filemanager fp-select">
 395      <div class="fp-select-loading">
 396          <img src="'.$this->pix_url('i/loading_small').'" />
 397      </div>
 398      <form class="form-horizontal">
 399          <button class="fp-file-download">'.get_string('download').'</button>
 400          <button class="fp-file-delete">'.get_string('delete').'</button>
 401          <button class="fp-file-setmain">'.get_string('setmainfile', 'repository').'</button>
 402          <span class="fp-file-setmain-help">'.$OUTPUT->help_icon('setmainfile', 'repository').'</span>
 403          <button class="fp-file-zip">'.get_string('zip', 'editor').'</button>
 404          <button class="fp-file-unzip">'.get_string('unzip').'</button>
 405          <div class="fp-hr"></div>
 406  
 407          <div class="fp-forminset">
 408                  <div class="fp-saveas control-group clearfix">
 409                      <label class="control-label">'.get_string('name', 'repository').'</label>
 410                      <div class="controls">
 411                          <input type="text"/>
 412                      </div>
 413                  </div>
 414                  <div class="fp-author control-group clearfix">
 415                      <label class="control-label">'.get_string('author', 'repository').'</label>
 416                      <div class="controls">
 417                          <input type="text"/>
 418                      </div>
 419                  </div>
 420                  <div class="fp-license control-group clearfix">
 421                      <label class="control-label">'.get_string('chooselicense', 'repository').'</label>
 422                      <div class="controls">
 423                          <select></select>
 424                      </div>
 425                  </div>
 426                  <div class="fp-path control-group clearfix">
 427                      <label class="control-label">'.get_string('path', 'repository').'</label>
 428                      <div class="controls">
 429                          <select></select>
 430                      </div>
 431                  </div>
 432                  <div class="fp-original control-group clearfix">
 433                      <label class="control-label">'.get_string('original', 'repository').'</label>
 434                      <div class="controls">
 435                          <span class="fp-originloading">'.$iconprogress.' '.$strloading.'</span><span class="fp-value"></span>
 436                      </div>
 437                  </div>
 438                  <div class="fp-reflist control-group clearfix">
 439                      <label class="control-label">'.get_string('referenceslist', 'repository').'</label>
 440                      <div class="controls">
 441                          <p class="fp-refcount"></p>
 442                          <span class="fp-reflistloading">'.$iconprogress.' '.$strloading.'</span>
 443                          <ul class="fp-value"></ul>
 444                      </div>
 445                  </div>
 446          </div>
 447          <div class="fp-select-buttons">
 448              <button class="fp-file-update btn-primary btn">'.get_string('update', 'moodle').'</button>
 449              <button class="fp-file-cancel btn-cancel btn">'.get_string('cancel').'</button>
 450          </div>
 451      </form>
 452      <div class="fp-info clearfix">
 453          <div class="fp-hr"></div>
 454          <p class="fp-thumbnail"></p>
 455          <div class="fp-fileinfo">
 456              <div class="fp-datemodified">'.get_string('lastmodified', 'repository').' <span class="fp-value"></span></div>
 457              <div class="fp-datecreated">'.get_string('datecreated', 'repository').' <span class="fp-value"></span></div>
 458              <div class="fp-size">'.get_string('size', 'repository').' <span class="fp-value"></span></div>
 459              <div class="fp-dimensions">'.get_string('dimensions', 'repository').' <span class="fp-value"></span></div>
 460          </div>
 461      </div>
 462  </div>';
 463          return $rv;
 464      }
 465  
 466      /**
 467       * FileManager JS template for popup confirm dialogue window.
 468       *
 469       * Must have one top element, CSS for this element must define width and height of the window;
 470       *
 471       * content of element with class 'fp-dlg-text' will be replaced with dialog text;
 472       * elements with classes 'fp-dlg-butconfirm' and 'fp-dlg-butcancel' will
 473       * hold onclick events;
 474       *
 475       * @return string
 476       */
 477      private function fm_js_template_confirmdialog() {
 478          $rv = '
 479  <div class="filemanager fp-dlg">
 480      <div class="fp-dlg-text"></div>
 481      <button class="fp-dlg-butconfirm btn-primary btn">'.get_string('ok').'</button>
 482      <button class="fp-dlg-butcancel btn-cancel btn">'.get_string('cancel').'</button>
 483  </div>';
 484          return $rv;
 485      }
 486  
 487      /**
 488       * Returns all FileManager JavaScript templates as an array.
 489       *
 490       * @return array
 491       */
 492      public function filemanager_js_templates() {
 493          $class_methods = get_class_methods($this);
 494          $templates = array();
 495          foreach ($class_methods as $method_name) {
 496              if (preg_match('/^fm_js_template_(.*)$/', $method_name, $matches))
 497              $templates[$matches[1]] = $this->$method_name();
 498          }
 499          return $templates;
 500      }
 501  
 502      /**
 503       * Displays restrictions for the file manager
 504       *
 505       * @param form_filemanager $fm
 506       * @return string
 507       */
 508      private function fm_print_restrictions($fm) {
 509          $maxbytes = display_size($fm->options->maxbytes);
 510          $strparam = (object) array('size' => $maxbytes, 'attachments' => $fm->options->maxfiles,
 511              'areasize' => display_size($fm->options->areamaxbytes));
 512          $hasmaxfiles = !empty($fm->options->maxfiles) && $fm->options->maxfiles > 0;
 513          $hasarealimit = !empty($fm->options->areamaxbytes) && $fm->options->areamaxbytes != -1;
 514          if ($hasmaxfiles && $hasarealimit) {
 515              $maxsize = get_string('maxsizeandattachmentsandareasize', 'moodle', $strparam);
 516          } else if ($hasmaxfiles) {
 517              $maxsize = get_string('maxsizeandattachments', 'moodle', $strparam);
 518          } else if ($hasarealimit) {
 519              $maxsize = get_string('maxsizeandareasize', 'moodle', $strparam);
 520          } else {
 521              $maxsize = get_string('maxfilesize', 'moodle', $maxbytes);
 522          }
 523          // TODO MDL-32020 also should say about 'File types accepted'
 524          return '<span>'. $maxsize . '</span>';
 525      }
 526  
 527      /**
 528       * Template for FilePicker with general layout (not QuickUpload).
 529       *
 530       * Must have one top element containing everything else (recommended <div class="file-picker">),
 531       * CSS for this element must define width and height of the filepicker window. Or CSS must
 532       * define min-width, max-width, min-height and max-height and in this case the filepicker
 533       * window will be resizeable;
 534       *
 535       * Element with class 'fp-viewbar' will have the class 'enabled' or 'disabled' when view mode
 536       * can be changed or not;
 537       * Inside element with class 'fp-viewbar' there are expected elements with classes
 538       * 'fp-vb-icons', 'fp-vb-tree' and 'fp-vb-details'. They will handle onclick events to switch
 539       * between the view modes, the last clicked element will have the class 'checked';
 540       *
 541       * Element with class 'fp-repo' is a template for displaying one repository. Other repositories
 542       * will be attached as siblings (classes first/last/even/odd will be added respectfully).
 543       * The currently selected repostory will have class 'active'. Contents of element with class
 544       * 'fp-repo-name' will be replaced with repository name, source of image with class
 545       * 'fp-repo-icon' will be replaced with repository icon;
 546       *
 547       * Element with class 'fp-content' is obligatory and will hold the current contents;
 548       *
 549       * Element with class 'fp-paging' will contain page navigation (will be deprecated soon);
 550       *
 551       * Element with class 'fp-path-folder' is a template for one folder in path toolbar.
 552       * It will hold mouse click event and will be assigned classes first/last/even/odd respectfully.
 553       * Parent element will receive class 'empty' when there are no folders to be displayed;
 554       * The content of subelement with class 'fp-path-folder-name' will be substituted with folder name;
 555       *
 556       * Element with class 'fp-toolbar' will have class 'empty' if all 'Back', 'Search', 'Refresh',
 557       * 'Logout', 'Manage' and 'Help' are unavailable for this repo;
 558       *
 559       * Inside fp-toolbar there are expected elements with classes fp-tb-back, fp-tb-search,
 560       * fp-tb-refresh, fp-tb-logout, fp-tb-manage and fp-tb-help. Each of them will have
 561       * class 'enabled' or 'disabled' if particular repository has this functionality.
 562       * Element with class 'fp-tb-search' must contain empty form inside, it's contents will
 563       * be substituted with the search form returned by repository (in the most cases it
 564       * is generated with template core_repository_renderer::repository_default_searchform);
 565       * Other elements must have either <a> or <button> element inside, it will hold onclick
 566       * event for corresponding action; labels for fp-tb-back and fp-tb-logout may be
 567       * replaced with those specified by repository;
 568       *
 569       * @return string
 570       */
 571      private function fp_js_template_generallayout() {
 572          $rv = '
 573  <div tabindex="0" class="file-picker fp-generallayout" role="dialog" aria-live="assertive">
 574      <div class="fp-repo-area">
 575          <ul class="fp-list">
 576              <li class="fp-repo">
 577                  <a href="#"><img class="fp-repo-icon" alt=" " width="16" height="16" />&nbsp;<span class="fp-repo-name"></span></a>
 578              </li>
 579          </ul>
 580      </div>
 581      <div class="fp-repo-items" tabindex="0">
 582          <div class="fp-navbar">
 583              <div>
 584                  <div class="fp-toolbar">
 585                      <div class="fp-tb-back">
 586                          <a href="#">'.get_string('back', 'repository').'</a>
 587                      </div>
 588                      <div class="fp-tb-search">
 589                          <form></form>
 590                      </div>
 591                      <div class="fp-tb-refresh">
 592                          <a title="'. get_string('refresh', 'repository') .'" href="#">
 593                              <img alt=""  src="'.$this->pix_url('a/refresh').'" />
 594                          </a>
 595                      </div>
 596                      <div class="fp-tb-logout">
 597                          <a title="'. get_string('logout', 'repository') .'" href="#">
 598                              <img alt="" src="'.$this->pix_url('a/logout').'" />
 599                          </a>
 600                      </div>
 601                      <div class="fp-tb-manage">
 602                          <a title="'. get_string('settings', 'repository') .'" href="#">
 603                              <img alt="" src="'.$this->pix_url('a/setting').'" />
 604                          </a>
 605                      </div>
 606                      <div class="fp-tb-help">
 607                          <a title="'. get_string('help', 'repository') .'" href="#">
 608                              <img alt="" src="'.$this->pix_url('a/help').'" />
 609                          </a>
 610                      </div>
 611                      <div class="fp-tb-message"></div>
 612                  </div>
 613                  <div class="fp-viewbar">
 614                      <a role="button" title="'. get_string('displayicons', 'repository') .'" class="fp-vb-icons" href="#">
 615                          <img alt="" src="'. $this->pix_url('fp/view_icon_active', 'theme') .'" />
 616                      </a>
 617                      <a role="button" title="'. get_string('displaydetails', 'repository') .'" class="fp-vb-details" href="#">
 618                          <img alt="" src="'. $this->pix_url('fp/view_list_active', 'theme') .'" />
 619                      </a>
 620                      <a role="button" title="'. get_string('displaytree', 'repository') .'" class="fp-vb-tree" href="#">
 621                          <img alt="" src="'. $this->pix_url('fp/view_tree_active', 'theme') .'" />
 622                      </a>
 623                  </div>
 624                  <div class="fp-clear-left"></div>
 625              </div>
 626              <div class="fp-pathbar">
 627                   <span class="fp-path-folder"><a class="fp-path-folder-name" href="#"></a></span>
 628              </div>
 629          </div>
 630          <div class="fp-content"></div>
 631      </div>
 632  </div>';
 633          return $rv;
 634      }
 635  
 636      /**
 637       * FilePicker JS template for displaying one file in 'icon view' mode.
 638       *
 639       * the element with class 'fp-thumbnail' will be resized to the repository thumbnail size
 640       * (both width and height, unless min-width and/or min-height is set in CSS) and the content of
 641       * an element will be replaced with an appropriate img;
 642       *
 643       * the width of element with class 'fp-filename' will be set to the repository thumbnail width
 644       * (unless min-width is set in css) and the content of an element will be replaced with filename
 645       * supplied by repository;
 646       *
 647       * top element(s) will have class fp-folder if the element is a folder;
 648       *
 649       * List of files will have parent <div> element with class 'fp-iconview'
 650       *
 651       * @return string
 652       */
 653      private function fp_js_template_iconfilename() {
 654          $rv = '
 655  <a class="fp-file" href="#" >
 656      <div style="position:relative;">
 657          <div class="fp-thumbnail"></div>
 658          <div class="fp-reficons1"></div>
 659          <div class="fp-reficons2"></div>
 660      </div>
 661      <div class="fp-filename-field">
 662          <p class="fp-filename"></p>
 663      </div>
 664  </a>';
 665          return $rv;
 666      }
 667  
 668      /**
 669       * FilePicker JS template for displaying file name in 'table view' and 'tree view' modes.
 670       *
 671       * content of the element with class 'fp-icon' will be replaced with an appropriate img;
 672       *
 673       * content of element with class 'fp-filename' will be replaced with filename supplied by
 674       * repository;
 675       *
 676       * top element(s) will have class fp-folder if the element is a folder;
 677       *
 678       * Note that tree view and table view are the YUI widgets and therefore there are no
 679       * other templates. The widgets will be wrapped in <div> with class fp-treeview or
 680       * fp-tableview (respectfully).
 681       *
 682       * @return string
 683       */
 684      private function fp_js_template_listfilename() {
 685          $rv = '
 686  <span class="fp-filename-icon">
 687      <a href="#">
 688          <span class="fp-icon"></span>
 689          <span class="fp-filename"></span>
 690      </a>
 691  </span>';
 692          return $rv;
 693      }
 694  
 695      /**
 696       * FilePicker JS template for displaying link/loading progress for fetching of the next page
 697       *
 698       * This text is added to .fp-content AFTER .fp-iconview/.fp-treeview/.fp-tableview
 699       *
 700       * Must have one parent element with class 'fp-nextpage'. It will be assigned additional
 701       * class 'loading' during loading of the next page (it is recommended that in this case the link
 702       * becomes unavailable). Also must contain one element <a> or <button> that will hold
 703       * onclick event for displaying of the next page. The event will be triggered automatically
 704       * when user scrolls to this link.
 705       *
 706       * @return string
 707       */
 708      private function fp_js_template_nextpage() {
 709          $rv = '
 710  <div class="fp-nextpage">
 711      <div class="fp-nextpage-link"><a href="#">'.get_string('more').'</a></div>
 712      <div class="fp-nextpage-loading">
 713          <img src="'.$this->pix_url('i/loading_small').'" />
 714      </div>
 715  </div>';
 716          return $rv;
 717      }
 718  
 719      /**
 720       * FilePicker JS template for window appearing to select a file.
 721       *
 722       * All content must be enclosed in one element, CSS for this class must define width and
 723       * height of the window;
 724       *
 725       * Thumbnail image will be added as content to the element with class 'fp-thumbnail';
 726       *
 727       * Inside the window the elements with the following classnames must be present:
 728       * 'fp-saveas', 'fp-linktype-2', 'fp-linktype-1', 'fp-linktype-4', 'fp-setauthor',
 729       * 'fp-setlicense'. Inside each of them must have one input element (or select in case of
 730       * fp-setlicense). They may also have labels.
 731       * The elements will be assign with class 'uneditable' and input/select element will become
 732       * disabled if they are not applicable for the particular file;
 733       *
 734       * There may be present elements with classes 'fp-datemodified', 'fp-datecreated', 'fp-size',
 735       * 'fp-license', 'fp-author', 'fp-dimensions'. They will receive additional class 'fp-unknown'
 736       * if information is unavailable. If there is information available, the content of embedded
 737       * element with class 'fp-value' will be substituted with the value;
 738       *
 739       * Elements with classes 'fp-select-confirm' and 'fp-select-cancel' will hold corresponding
 740       * onclick events;
 741       *
 742       * When confirm button is pressed and file is being selected, the top element receives
 743       * additional class 'loading'. It is removed when response from server is received.
 744       *
 745       * @return string
 746       */
 747      private function fp_js_template_selectlayout() {
 748          $rv = '
 749  <div class="file-picker fp-select">
 750      <div class="fp-select-loading">
 751          <img src="'.$this->pix_url('i/loading_small').'" />
 752      </div>
 753      <form class="form-horizontal">
 754          <div class="fp-forminset">
 755                  <div class="fp-linktype-2 control-group control-radio clearfix">
 756                      <label class="control-label control-radio">'.get_string('makefileinternal', 'repository').'</label>
 757                      <div class="controls control-radio">
 758                          <input type="radio"/>
 759                      </div>
 760                  </div>
 761                  <div class="fp-linktype-1 control-group control-radio clearfix">
 762                      <label class="control-label control-radio">'.get_string('makefilelink', 'repository').'</label>
 763                      <div class="controls control-radio">
 764                          <input type="radio"/>
 765                      </div>
 766                  </div>
 767                  <div class="fp-linktype-4 control-group control-radio clearfix">
 768                      <label class="control-label control-radio">'.get_string('makefilereference', 'repository').'</label>
 769                      <div class="controls control-radio">
 770                          <input type="radio"/>
 771                      </div>
 772                  </div>
 773                  <div class="fp-saveas control-group clearfix">
 774                      <label class="control-label">'.get_string('saveas', 'repository').'</label>
 775                      <div class="controls">
 776                          <input type="text"/>
 777                      </div>
 778                  </div>
 779                  <div class="fp-setauthor control-group clearfix">
 780                      <label class="control-label">'.get_string('author', 'repository').'</label>
 781                      <div class="controls">
 782                          <input type="text"/>
 783                      </div>
 784                  </div>
 785                  <div class="fp-setlicense control-group clearfix">
 786                      <label class="control-label">'.get_string('chooselicense', 'repository').'</label>
 787                      <div class="controls">
 788                          <select></select>
 789                      </div>
 790                  </div>
 791          </div>
 792         <div class="fp-select-buttons">
 793              <button class="fp-select-confirm btn-primary btn">'.get_string('getfile', 'repository').'</button>
 794              <button class="fp-select-cancel btn-cancel btn">'.get_string('cancel').'</button>
 795          </div>
 796      </form>
 797      <div class="fp-info clearfix">
 798          <div class="fp-hr"></div>
 799          <p class="fp-thumbnail"></p>
 800          <div class="fp-fileinfo">
 801              <div class="fp-datemodified">'.get_string('lastmodified', 'repository').'<span class="fp-value"></span></div>
 802              <div class="fp-datecreated">'.get_string('datecreated', 'repository').'<span class="fp-value"></span></div>
 803              <div class="fp-size">'.get_string('size', 'repository').'<span class="fp-value"></span></div>
 804              <div class="fp-license">'.get_string('license', 'repository').'<span class="fp-value"></span></div>
 805              <div class="fp-author">'.get_string('author', 'repository').'<span class="fp-value"></span></div>
 806              <div class="fp-dimensions">'.get_string('dimensions', 'repository').'<span class="fp-value"></span></div>
 807          </div>
 808      </div>
 809  </div>';
 810          return $rv;
 811      }
 812  
 813      /**
 814       * FilePicker JS template for 'Upload file' repository
 815       *
 816       * Content to display when user chooses 'Upload file' repository (will be nested inside
 817       * element with class 'fp-content').
 818       *
 819       * Must contain form (enctype="multipart/form-data" method="POST")
 820       *
 821       * The elements with the following classnames must be present:
 822       * 'fp-file', 'fp-saveas', 'fp-setauthor', 'fp-setlicense'. Inside each of them must have
 823       * one input element (or select in case of fp-setlicense). They may also have labels.
 824       *
 825       * Element with class 'fp-upload-btn' will hold onclick event for uploading the file;
 826       *
 827       * Please note that some fields may be hidden using CSS if this is part of quickupload form
 828       *
 829       * @return string
 830       */
 831      private function fp_js_template_uploadform() {
 832          $rv = '
 833  <div class="fp-upload-form">
 834      <div class="fp-content-center">
 835          <form enctype="multipart/form-data" method="POST" class="form-horizontal">
 836              <div class="fp-formset">
 837                  <div class="fp-file control-group clearfix">
 838                      <label class="control-label">'.get_string('attachment', 'repository').'</label>
 839                      <div class="controls">
 840                          <input type="file"/>
 841                      </div>
 842                  </div>
 843                  <div class="fp-saveas control-group clearfix">
 844                      <label class="control-label">'.get_string('saveas', 'repository').'</label>
 845                      <div class="controls">
 846                          <input type="text"/>
 847                      </div>
 848                  </div>
 849                  <div class="fp-setauthor control-group clearfix">
 850                      <label class="control-label">'.get_string('author', 'repository').'</label>
 851                      <div class="controls">
 852                          <input type="text"/>
 853                      </div>
 854                  </div>
 855                  <div class="fp-setlicense control-group clearfix">
 856                      <label class="control-label">'.get_string('chooselicense', 'repository').'</label>
 857                      <div class="controls">
 858                          <select ></select>
 859                      </div>
 860                  </div>
 861              </div>
 862          </form>
 863          <div class="mdl-align">
 864              <button class="fp-upload-btn btn-primary btn">'.get_string('upload', 'repository').'</button>
 865          </div>
 866      </div>
 867  </div> ';
 868          return $rv;
 869      }
 870  
 871      /**
 872       * FilePicker JS template to display during loading process (inside element with class 'fp-content').
 873       *
 874       * @return string
 875       */
 876      private function fp_js_template_loading() {
 877          return '
 878  <div class="fp-content-loading">
 879      <div class="fp-content-center">
 880          <img src="'.$this->pix_url('i/loading_small').'" />
 881      </div>
 882  </div>';
 883      }
 884  
 885      /**
 886       * FilePicker JS template for error (inside element with class 'fp-content').
 887       *
 888       * must have element with class 'fp-error', its content will be replaced with error text
 889       * and the error code will be assigned as additional class to this element
 890       * used errors: invalidjson, nofilesavailable, norepositoriesavailable
 891       *
 892       * @return string
 893       */
 894      private function fp_js_template_error() {
 895          $rv = '
 896  <div class="fp-content-error" ><div class="fp-error"></div></div>';
 897          return $rv;
 898      }
 899  
 900      /**
 901       * FilePicker JS template for error/info message displayed as a separate popup window.
 902       *
 903       * Must be wrapped in one element, CSS for this element must define
 904       * width and height of the window. It will be assigned with an additional class 'fp-msg-error'
 905       * or 'fp-msg-info' depending on message type;
 906       *
 907       * content of element with class 'fp-msg-text' will be replaced with error/info text;
 908       *
 909       * element with class 'fp-msg-butok' will hold onclick event
 910       *
 911       * @return string
 912       */
 913      private function fp_js_template_message() {
 914          $rv = '
 915  <div class="file-picker fp-msg" role="alertdialog" aria-live="assertive" aria-labelledby="fp-msg-labelledby">
 916      <p class="fp-msg-text" id="fp-msg-labelledby"></p>
 917      <button class="fp-msg-butok btn-primary btn">'.get_string('ok').'</button>
 918  </div>';
 919          return $rv;
 920      }
 921  
 922      /**
 923       * FilePicker JS template for popup dialogue window asking for action when file with the same name already exists.
 924       *
 925       * Must have one top element, CSS for this element must define width and height of the window;
 926       *
 927       * content of element with class 'fp-dlg-text' will be replaced with dialog text;
 928       * elements with classes 'fp-dlg-butoverwrite', 'fp-dlg-butrename',
 929       * 'fp-dlg-butoverwriteall', 'fp-dlg-butrenameall' and 'fp-dlg-butcancel' will
 930       * hold onclick events;
 931       *
 932       * content of element with class 'fp-dlg-butrename' will be substituted with appropriate string
 933       * (Note that it may have long text)
 934       *
 935       * @return string
 936       */
 937      private function fp_js_template_processexistingfile() {
 938          $rv = '
 939  <div class="file-picker fp-dlg">
 940      <p class="fp-dlg-text"></p>
 941      <div class="fp-dlg-buttons">
 942          <button class="fp-dlg-butoverwrite btn">'.get_string('overwrite', 'repository').'</button>
 943          <button class="fp-dlg-butrename btn"></button>
 944          <button class="fp-dlg-butcancel btn btn-cancel">'.get_string('cancel').'</button>
 945      </div>
 946  </div>';
 947          return $rv;
 948      }
 949  
 950      /**
 951       * FilePicker JS template for popup dialogue window asking for action when file with the same name already exists (multiple-file version).
 952       *
 953       * Must have one top element, CSS for this element must define width and height of the window;
 954       *
 955       * content of element with class 'fp-dlg-text' will be replaced with dialog text;
 956       * elements with classes 'fp-dlg-butoverwrite', 'fp-dlg-butrename' and 'fp-dlg-butcancel' will
 957       * hold onclick events;
 958       *
 959       * content of element with class 'fp-dlg-butrename' will be substituted with appropriate string
 960       * (Note that it may have long text)
 961       *
 962       * @return string
 963       */
 964      private function fp_js_template_processexistingfilemultiple() {
 965          $rv = '
 966  <div class="file-picker fp-dlg">
 967      <p class="fp-dlg-text"></p>
 968      <a class="fp-dlg-butoverwrite fp-panel-button" href="#">'.get_string('overwrite', 'repository').'</a>
 969      <a class="fp-dlg-butcancel fp-panel-button" href="#">'.get_string('cancel').'</a>
 970      <a class="fp-dlg-butrename fp-panel-button" href="#"></a>
 971      <br/>
 972      <a class="fp-dlg-butoverwriteall fp-panel-button" href="#">'.get_string('overwriteall', 'repository').'</a>
 973      <a class="fp-dlg-butrenameall fp-panel-button" href="#">'.get_string('renameall', 'repository').'</a>
 974  </div>';
 975          return $rv;
 976      }
 977  
 978      /**
 979       * FilePicker JS template for repository login form including templates for each element type
 980       *
 981       * Must contain one <form> element with templates for different input types inside:
 982       * Elements with classes 'fp-login-popup', 'fp-login-textarea', 'fp-login-select' and
 983       * 'fp-login-input' are templates for displaying respective login form elements. Inside
 984       * there must be exactly one element with type <button>, <textarea>, <select> or <input>
 985       * (i.e. fp-login-popup should have <button>, fp-login-textarea should have <textarea>, etc.);
 986       * They may also contain the <label> element and it's content will be substituted with
 987       * label;
 988       *
 989       * You can also define elements with classes 'fp-login-checkbox', 'fp-login-text'
 990       * but if they are not found, 'fp-login-input' will be used;
 991       *
 992       * Element with class 'fp-login-radiogroup' will be used for group of radio inputs. Inside
 993       * it should hava a template for one radio input (with class 'fp-login-radio');
 994       *
 995       * Element with class 'fp-login-submit' will hold on click mouse event (form submission). It
 996       * will be removed if at least one popup element is present;
 997       *
 998       * @return string
 999       */
1000      private function fp_js_template_loginform() {
1001          $rv = '
1002  <div class="fp-login-form">
1003      <div class="fp-content-center">
1004          <form class="form-horizontal">
1005              <div class="fp-formset">
1006                  <div class="fp-login-popup control-group clearfix">
1007                      <div class="controls fp-popup">
1008                          <button class="fp-login-popup-but btn-primary btn">'.get_string('login', 'repository').'</button>
1009                      </div>
1010                  </div>
1011                  <div class="fp-login-textarea control-group clearfix">
1012                      <div class="controls"><textarea></textarea></div>
1013                  </div>
1014                  <div class="fp-login-select control-group clearfix">
1015                      <label class="control-label"></label>
1016  
1017                      <div class="controls"><select></select></div>
1018                  </div>';
1019          // HACK to prevent browsers from automatically inserting the user's password into the wrong fields.
1020          $rv .= prevent_form_autofill_password();
1021          $rv .= '
1022                  <div class="fp-login-input control-group clearfix">
1023                      <label class="control-label"></label>
1024                      <div class="controls"><input/></div>
1025                  </div>
1026                  <div class="fp-login-radiogroup control-group clearfix">
1027                      <label class="control-label"></label>
1028                      <div class="controls fp-login-radio"><input /> <label></label></div>
1029                  </div>
1030              </div>
1031              <p><button class="fp-login-submit btn-primary btn">'.get_string('submit', 'repository').'</button></p>
1032          </form>
1033      </div>
1034  </div>';
1035          return $rv;
1036      }
1037  
1038      /**
1039       * Returns all FilePicker JavaScript templates as an array.
1040       *
1041       * @return array
1042       */
1043      public function filepicker_js_templates() {
1044          $class_methods = get_class_methods($this);
1045          $templates = array();
1046          foreach ($class_methods as $method_name) {
1047              if (preg_match('/^fp_js_template_(.*)$/', $method_name, $matches))
1048              $templates[$matches[1]] = $this->$method_name();
1049          }
1050          return $templates;
1051      }
1052  
1053      /**
1054       * Returns HTML for default repository searchform to be passed to Filepicker
1055       *
1056       * This will be used as contents for search form defined in generallayout template
1057       * (form with id {TOOLSEARCHID}).
1058       * Default contents is one text input field with name="s"
1059       */
1060      public function repository_default_searchform() {
1061          $searchinput = html_writer::label(get_string('searchrepo', 'repository'),
1062              'reposearch', false, array('class' => 'accesshide'));
1063          $searchinput .= html_writer::empty_tag('input', array('type' => 'text',
1064              'id' => 'reposearch', 'name' => 's', 'value' => get_string('search', 'repository')));
1065          $str = html_writer::tag('div', $searchinput, array('class' => "fp-def-search"));
1066  
1067          return $str;
1068      }
1069  }
1070  
1071  /**
1072   * Data structure representing a general moodle file tree viewer
1073   *
1074   * @copyright 2010 Dongsheng Cai
1075   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
1076   * @since     Moodle 2.0
1077   */
1078  class files_tree_viewer implements renderable {
1079      public $tree;
1080      public $path;
1081      public $context;
1082  
1083      /**
1084       * Constructor of moodle_file_tree_viewer class
1085       * @param file_info $file_info
1086       * @param array $options
1087       */
1088      public function __construct(file_info $file_info, array $options = null) {
1089          global $CFG;
1090  
1091          //note: this MUST NOT use get_file_storage() !!!!!!!!!!!!!!!!!!!!!!!!!!!!
1092          $this->options = (array)$options;
1093          $this->context = $options['context'];
1094  
1095          $this->tree = array();
1096          $children = $file_info->get_children();
1097          $current_file_params = $file_info->get_params();
1098          $parent_info = $file_info->get_parent();
1099          $level = $parent_info;
1100          $this->path = array();
1101          while ($level) {
1102              $params = $level->get_params();
1103              $context = context::instance_by_id($params['contextid']);
1104              // $this->context is current context
1105              if ($context->id != $this->context->id or empty($params['filearea'])) {
1106                  break;
1107              }
1108              // unset unused parameters
1109              unset($params['component']);
1110              unset($params['filearea']);
1111              unset($params['filename']);
1112              unset($params['itemid']);
1113              $url = new moodle_url('/files/index.php', $params);
1114              $this->path[] = html_writer::link($url, $level->get_visible_name());
1115              $level = $level->get_parent();
1116          }
1117          $this->path = array_reverse($this->path);
1118          if ($current_file_params['filepath'] != '/') {
1119              $this->path[] = $file_info->get_visible_name();
1120          }
1121  
1122          foreach ($children as $child) {
1123              $filedate = $child->get_timemodified();
1124              $filesize = $child->get_filesize();
1125              $mimetype = $child->get_mimetype();
1126              $params = $child->get_params();
1127              unset($params['component']);
1128              unset($params['filearea']);
1129              unset($params['filename']);
1130              unset($params['itemid']);
1131              $fileitem = array(
1132                      'params'   => $params,
1133                      'filename' => $child->get_visible_name(),
1134                      'mimetype' => $child->get_mimetype(),
1135                      'filedate' => $filedate ? $filedate : '',
1136                      'filesize' => $filesize ? $filesize : ''
1137                      );
1138              $url = new moodle_url('/files/index.php', $params);
1139              if ($child->is_directory()) {
1140                  $fileitem['isdir'] = true;
1141                  $fileitem['url'] = $url->out(false);
1142              } else {
1143                  $fileitem['url'] = $child->get_url();
1144              }
1145              $this->tree[] = $fileitem;
1146          }
1147      }
1148  }

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