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   1  // This file is part of Moodle - http://moodle.org/
   2  //
   3  // Moodle is free software: you can redistribute it and/or modify
   4  // it under the terms of the GNU General Public License as published by
   5  // the Free Software Foundation, either version 3 of the License, or
   6  // (at your option) any later version.
   7  //
   8  // Moodle is distributed in the hope that it will be useful,
   9  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  // GNU General Public License for more details.
  12  //
  13  // You should have received a copy of the GNU General Public License
  14  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  15  
  16  /**
  17   * Javascript helper function for SCORM module.
  18   *
  19   * @package   mod-scorm
  20   * @copyright 2009 Petr Skoda (http://skodak.org)
  21   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  22   */
  23  
  24  mod_scorm_launch_next_sco = null;
  25  mod_scorm_launch_prev_sco = null;
  26  mod_scorm_activate_item = null;
  27  mod_scorm_parse_toc_tree = null;
  28  scorm_layout_widget = null;
  29  
  30  window.scorm_current_node = null;
  31  
  32  function underscore(str) {
  33      str = String(str).replace(/.N/g,".");
  34      return str.replace(/\./g,"__");
  35  }
  36  
  37  M.mod_scorm = {};
  38  
  39  M.mod_scorm.init = function(Y, nav_display, navposition_left, navposition_top, hide_toc, collapsetocwinsize, toc_title, window_name, launch_sco, scoes_nav) {
  40      var scorm_disable_toc = false;
  41      var scorm_hide_nav = true;
  42      var scorm_hide_toc = true;
  43      if (hide_toc == 0) {
  44          if (nav_display !== 0) {
  45              scorm_hide_nav = false;
  46          }
  47          scorm_hide_toc = false;
  48      } else if (hide_toc == 3) {
  49          scorm_disable_toc = true;
  50      }
  51  
  52      scoes_nav = Y.JSON.parse(scoes_nav);
  53      var scorm_buttons = [];
  54      var scorm_bloody_labelclick = false;
  55      var scorm_nav_panel;
  56  
  57      Y.use('button', 'dd-plugin', 'panel', 'resize', 'gallery-sm-treeview', function(Y) {
  58  
  59          Y.TreeView.prototype.getNodeByAttribute = function(attribute, value) {
  60              var node = null,
  61                  domnode = Y.one('a[' + attribute + '="' + value + '"]');
  62              if (domnode !== null) {
  63                  node = scorm_tree_node.getNodeById(domnode.ancestor('li').get('id'));
  64              }
  65              return node;
  66          };
  67  
  68          Y.TreeView.prototype.openAll = function () {
  69              this.get('container').all('.yui3-treeview-can-have-children').each(function(target) {
  70                  this.getNodeById(target.get('id')).open();
  71              }, this);
  72          };
  73  
  74          Y.TreeView.prototype.closeAll = function () {
  75              this.get('container').all('.yui3-treeview-can-have-children').each(function(target) {
  76                  this.getNodeById(target.get('id')).close();
  77              }, this);
  78          }
  79  
  80          var scorm_parse_toc_tree = function(srcNode) {
  81              var SELECTORS = {
  82                      child: '> li',
  83                      label: '> li, > a',
  84                      textlabel : '> li, > span',
  85                      subtree: '> ul, > li'
  86                  },
  87                  children = [];
  88  
  89              srcNode.all(SELECTORS.child).each(function(childNode) {
  90                  var child = {},
  91                      labelNode = childNode.one(SELECTORS.label),
  92                      textNode = childNode.one(SELECTORS.textlabel),
  93                      subTreeNode = childNode.one(SELECTORS.subtree);
  94  
  95                  if (labelNode) {
  96                      var title = labelNode.getAttribute('title');
  97                      var scoid = labelNode.getData('scoid');
  98                      child.label = labelNode.get('outerHTML');
  99                      // Will be good to change to url instead of title.
 100                      if (title && title !== '#') {
 101                          child.title = title;
 102                      }
 103                      if (typeof scoid !== 'undefined') {
 104                          child.scoid = scoid;
 105                      }
 106                  } else if (textNode) {
 107                      // The selector did not find a label node with anchor.
 108                      child.label = textNode.get('outerHTML');
 109                  }
 110  
 111                  if (subTreeNode) {
 112                      child.children = scorm_parse_toc_tree(subTreeNode);
 113                  }
 114  
 115                  children.push(child);
 116              });
 117  
 118              return children;
 119          };
 120  
 121          mod_scorm_parse_toc_tree = scorm_parse_toc_tree;
 122  
 123          var scorm_activate_item = function(node) {
 124              if (!node) {
 125                  return;
 126              }
 127              // Check if the item is already active, avoid recursive calls.
 128              var content = Y.one('#scorm_content');
 129              var old = Y.one('#scorm_object');
 130              if (old) {
 131                  var scorm_active_url = Y.one('#scorm_object').getAttribute('src');
 132                  var node_full_url = M.cfg.wwwroot + '/mod/scorm/loadSCO.php?' + node.title;
 133                  if (node_full_url === scorm_active_url) {
 134                      return;
 135                  }
 136                  // Start to unload iframe here
 137                  if(!window_name){
 138                      content.removeChild(old);
 139                      old = null;
 140                  }
 141              }
 142              // End of - Avoid recursive calls.
 143  
 144              scorm_current_node = node;
 145              if (!scorm_current_node.state.selected) {
 146                  scorm_current_node.select();
 147              }
 148  
 149              scorm_tree_node.closeAll();
 150              var url_prefix = M.cfg.wwwroot + '/mod/scorm/loadSCO.php?';
 151              var el_old_api = document.getElementById('scormapi123');
 152              if (el_old_api) {
 153                  el_old_api.parentNode.removeChild(el_old_api);
 154              }
 155  
 156              var obj = document.createElement('iframe');
 157              obj.setAttribute('id', 'scorm_object');
 158              obj.setAttribute('type', 'text/html');
 159              if (!window_name && node.title != null) {
 160                  obj.setAttribute('src', url_prefix + node.title);
 161              }
 162              if (window_name) {
 163                  var mine = window.open('','','width=1,height=1,left=0,top=0,scrollbars=no');
 164                  if(! mine) {
 165                      alert(M.str.scorm.popupsblocked);
 166                  }
 167                  mine.close();
 168              }
 169  
 170              if (old) {
 171                  if(window_name) {
 172                      var cwidth = scormplayerdata.cwidth;
 173                      var cheight = scormplayerdata.cheight;
 174                      var poptions = scormplayerdata.popupoptions;
 175                      poptions = poptions + ',resizable=yes'; // Added for IE (MDL-32506).
 176                      scorm_openpopup(M.cfg.wwwroot + "/mod/scorm/loadSCO.php?" + node.title, window_name, poptions, cwidth, cheight);
 177                  }
 178              } else {
 179                  content.prepend(obj);
 180              }
 181  
 182              if (scorm_hide_nav == false) {
 183                  if (nav_display === 1 && navposition_left > 0 && navposition_top > 0) {
 184                      Y.one('#scorm_object').addClass(cssclasses.scorm_nav_under_content);
 185                  }
 186                  scorm_fixnav();
 187              }
 188              scorm_tree_node.openAll();
 189          };
 190  
 191          mod_scorm_activate_item = scorm_activate_item;
 192  
 193          /**
 194           * Enables/disables navigation buttons as needed.
 195           * @return void
 196           */
 197          var scorm_fixnav = function() {
 198              var skipprevnode = scorm_skipprev(scorm_current_node);
 199              var prevnode = scorm_prev(scorm_current_node);
 200              var skipnextnode = scorm_skipnext(scorm_current_node);
 201              var nextnode = scorm_next(scorm_current_node);
 202              var upnode = scorm_up(scorm_current_node);
 203  
 204              scorm_buttons[0].set('disabled', ((skipprevnode === null) ||
 205                          (typeof(skipprevnode.scoid) === 'undefined') ||
 206                          (scoes_nav[skipprevnode.scoid].isvisible === "false") ||
 207                          (skipprevnode.title === null) ||
 208                          (scoes_nav[launch_sco].hideprevious === 1)));
 209  
 210              scorm_buttons[1].set('disabled', ((prevnode === null) ||
 211                          (typeof(prevnode.scoid) === 'undefined') ||
 212                          (scoes_nav[prevnode.scoid].isvisible === "false") ||
 213                          (prevnode.title === null) ||
 214                          (scoes_nav[launch_sco].hideprevious === 1)));
 215  
 216              scorm_buttons[2].set('disabled', (upnode === null) ||
 217                          (typeof(upnode.scoid) === 'undefined') ||
 218                          (scoes_nav[upnode.scoid].isvisible === "false") ||
 219                          (upnode.title === null));
 220  
 221              scorm_buttons[3].set('disabled', ((nextnode === null) ||
 222                          ((nextnode.title === null) && (scoes_nav[launch_sco].flow !== 1)) ||
 223                          (typeof(nextnode.scoid) === 'undefined') ||
 224                          (scoes_nav[nextnode.scoid].isvisible === "false") ||
 225                          (scoes_nav[launch_sco].hidecontinue === 1)));
 226  
 227              scorm_buttons[4].set('disabled', ((skipnextnode === null) ||
 228                          (skipnextnode.title === null) ||
 229                          (typeof(skipnextnode.scoid) === 'undefined') ||
 230                          (scoes_nav[skipnextnode.scoid].isvisible === "false") ||
 231                          scoes_nav[launch_sco].hidecontinue === 1));
 232          };
 233  
 234          var scorm_toggle_toc = function(windowresize) {
 235              var toc = Y.one('#scorm_toc');
 236              var scorm_content = Y.one('#scorm_content');
 237              var scorm_toc_toggle_btn = Y.one('#scorm_toc_toggle_btn');
 238              var toc_disabled = toc.hasClass('disabled');
 239              var disabled_by = toc.getAttribute('disabled-by');
 240              // Remove width element style from resize handle.
 241              toc.setStyle('width', null);
 242              scorm_content.setStyle('width', null);
 243              if (windowresize === true) {
 244                  if (disabled_by === 'user') {
 245                      return;
 246                  }
 247                  var body = Y.one('body');
 248                  if (body.get('winWidth') < collapsetocwinsize) {
 249                      toc.addClass(cssclasses.disabled)
 250                          .setAttribute('disabled-by', 'screen-size');
 251                      scorm_toc_toggle_btn.setHTML('&gt;')
 252                          .set('title', M.util.get_string('show', 'moodle'));
 253                      scorm_content.removeClass(cssclasses.scorm_grid_content_toc_visible)
 254                          .addClass(cssclasses.scorm_grid_content_toc_hidden);
 255                  } else if (body.get('winWidth') > collapsetocwinsize) {
 256                      toc.removeClass(cssclasses.disabled)
 257                          .removeAttribute('disabled-by');
 258                      scorm_toc_toggle_btn.setHTML('&lt;')
 259                          .set('title', M.util.get_string('hide', 'moodle'));
 260                      scorm_content.removeClass(cssclasses.scorm_grid_content_toc_hidden)
 261                          .addClass(cssclasses.scorm_grid_content_toc_visible);
 262                  }
 263                  return;
 264              }
 265              if (toc_disabled) {
 266                  toc.removeClass(cssclasses.disabled)
 267                      .removeAttribute('disabled-by');
 268                  scorm_toc_toggle_btn.setHTML('&lt;')
 269                      .set('title', M.util.get_string('hide', 'moodle'));
 270                  scorm_content.removeClass(cssclasses.scorm_grid_content_toc_hidden)
 271                      .addClass(cssclasses.scorm_grid_content_toc_visible);
 272              } else {
 273                  toc.addClass(cssclasses.disabled)
 274                      .setAttribute('disabled-by', 'user');
 275                  scorm_toc_toggle_btn.setHTML('&gt;')
 276                      .set('title', M.util.get_string('show', 'moodle'));
 277                  scorm_content.removeClass(cssclasses.scorm_grid_content_toc_visible)
 278                      .addClass(cssclasses.scorm_grid_content_toc_hidden);
 279              }
 280          };
 281  
 282          var scorm_resize_layout = function() {
 283              if (window_name) {
 284                  return;
 285              }
 286  
 287              // make sure that the max width of the TOC doesn't go to far
 288  
 289              var scorm_toc_node = Y.one('#scorm_toc');
 290              var maxwidth = parseInt(Y.one('#scorm_layout').getComputedStyle('width'), 10);
 291              scorm_toc_node.setStyle('maxWidth', (maxwidth - 200));
 292              var cwidth = parseInt(scorm_toc_node.getComputedStyle('width'), 10);
 293              if (cwidth > (maxwidth - 1)) {
 294                  scorm_toc_node.setStyle('width', (maxwidth - 50));
 295              }
 296  
 297              // Calculate the rough new height from the viewport height.
 298              newheight = Y.one('body').get('winHeight') - 5;
 299              if (newheight < 600) {
 300                  newheight = 600;
 301              }
 302              Y.one('#scorm_layout').setStyle('height', newheight);
 303  
 304          };
 305  
 306          // Handle AJAX Request
 307          var scorm_ajax_request = function(url, datastring) {
 308              var myRequest = NewHttpReq();
 309              var result = DoRequest(myRequest, url + datastring);
 310              return result;
 311          };
 312  
 313          var scorm_up = function(node, update_launch_sco) {
 314              if (node.parent && node.parent.parent && typeof scoes_nav[launch_sco].parentscoid !== 'undefined') {
 315                  var parentscoid = scoes_nav[launch_sco].parentscoid;
 316                  var parent = node.parent;
 317                  if (parent.title !== scoes_nav[parentscoid].url) {
 318                      parent = scorm_tree_node.getNodeByAttribute('title', scoes_nav[parentscoid].url);
 319                      if (parent === null) {
 320                          parent = scorm_tree_node.rootNode.children[0];
 321                          parent.title = scoes_nav[parentscoid].url;
 322                      }
 323                  }
 324                  if (update_launch_sco) {
 325                      launch_sco = parentscoid;
 326                  }
 327                  return parent;
 328              }
 329              return null;
 330          };
 331  
 332          var scorm_lastchild = function(node) {
 333              if (node.children.length) {
 334                  return scorm_lastchild(node.children[node.children.length - 1]);
 335              } else {
 336                  return node;
 337              }
 338          };
 339  
 340          var scorm_prev = function(node, update_launch_sco) {
 341              if (node.previous() && node.previous().children.length &&
 342                      typeof scoes_nav[launch_sco].prevscoid !== 'undefined') {
 343                  node = scorm_lastchild(node.previous());
 344                  if (node) {
 345                      var prevscoid = scoes_nav[launch_sco].prevscoid;
 346                      if (node.title !== scoes_nav[prevscoid].url) {
 347                          node = scorm_tree_node.getNodeByAttribute('title', scoes_nav[prevscoid].url);
 348                          if (node === null) {
 349                              node = scorm_tree_node.rootNode.children[0];
 350                              node.title = scoes_nav[prevscoid].url;
 351                          }
 352                      }
 353                      if (update_launch_sco) {
 354                          launch_sco = prevscoid;
 355                      }
 356                      return node;
 357                  } else {
 358                      return null;
 359                  }
 360              }
 361              return scorm_skipprev(node, update_launch_sco);
 362          };
 363  
 364          var scorm_skipprev = function(node, update_launch_sco) {
 365              if (node.previous() && typeof scoes_nav[launch_sco].prevsibling !== 'undefined') {
 366                  var prevsibling = scoes_nav[launch_sco].prevsibling;
 367                  var previous = node.previous();
 368                  var prevscoid = scoes_nav[launch_sco].prevscoid;
 369                  if (previous.title !== scoes_nav[prevscoid].url) {
 370                      previous = scorm_tree_node.getNodeByAttribute('title', scoes_nav[prevsibling].url);
 371                      if (previous === null) {
 372                          previous = scorm_tree_node.rootNode.children[0];
 373                          previous.title = scoes_nav[prevsibling].url;
 374                      }
 375                  }
 376                  if (update_launch_sco) {
 377                      launch_sco = prevsibling;
 378                  }
 379                  return previous;
 380              } else if (node.parent && node.parent.parent && typeof scoes_nav[launch_sco].parentscoid !== 'undefined') {
 381                  var parentscoid = scoes_nav[launch_sco].parentscoid;
 382                  var parent = node.parent;
 383                  if (parent.title !== scoes_nav[parentscoid].url) {
 384                      parent = scorm_tree_node.getNodeByAttribute('title', scoes_nav[parentscoid].url);
 385                      if (parent === null) {
 386                          parent = scorm_tree_node.rootNode.children[0];
 387                          parent.title = scoes_nav[parentscoid].url;
 388                      }
 389                  }
 390                  if (update_launch_sco) {
 391                      launch_sco = parentscoid;
 392                  }
 393                  return parent;
 394              }
 395              return null;
 396          };
 397  
 398          var scorm_next = function(node, update_launch_sco) {
 399              if (node === false) {
 400                  return scorm_tree_node.children[0];
 401              }
 402              if (node.children.length && typeof scoes_nav[launch_sco].nextscoid != 'undefined') {
 403                  node = node.children[0];
 404                  var nextscoid = scoes_nav[launch_sco].nextscoid;
 405                  if (node.title !== scoes_nav[nextscoid].url) {
 406                      node = scorm_tree_node.getNodeByAttribute('title', scoes_nav[nextscoid].url);
 407                      if (node === null) {
 408                          node = scorm_tree_node.rootNode.children[0];
 409                          node.title = scoes_nav[nextscoid].url;
 410                      }
 411                  }
 412                  if (update_launch_sco) {
 413                      launch_sco = nextscoid;
 414                  }
 415                  return node;
 416              }
 417              return scorm_skipnext(node, update_launch_sco);
 418          };
 419  
 420          var scorm_skipnext = function(node, update_launch_sco) {
 421              var next = node.next();
 422              if (next && next.title && typeof scoes_nav[launch_sco] !== 'undefined' && typeof scoes_nav[launch_sco].nextsibling !== 'undefined') {
 423                  var nextsibling = scoes_nav[launch_sco].nextsibling;
 424                  if (next.title !== scoes_nav[nextsibling].url) {
 425                      next = scorm_tree_node.getNodeByAttribute('title', scoes_nav[nextsibling].url);
 426                      if (next === null) {
 427                          next = scorm_tree_node.rootNode.children[0];
 428                          next.title = scoes_nav[nextsibling].url;
 429                      }
 430                  }
 431                  if (update_launch_sco) {
 432                      launch_sco = nextsibling;
 433                  }
 434                  return next;
 435              } else if (node.parent && node.parent.parent && typeof scoes_nav[launch_sco].parentscoid !== 'undefined') {
 436                  var parentscoid = scoes_nav[launch_sco].parentscoid;
 437                  var parent = node.parent;
 438                  if (parent.title !== scoes_nav[parentscoid].url) {
 439                      parent = scorm_tree_node.getNodeByAttribute('title', scoes_nav[parentscoid].url);
 440                      if (parent === null) {
 441                          parent = scorm_tree_node.rootNode.children[0];
 442                      }
 443                  }
 444                  if (update_launch_sco) {
 445                      launch_sco = parentscoid;
 446                  }
 447                  return scorm_skipnext(parent, update_launch_sco);
 448              }
 449              return null;
 450          };
 451  
 452          // Launch prev sco
 453          var scorm_launch_prev_sco = function() {
 454              var result = null;
 455              if (scoes_nav[launch_sco].flow === 1) {
 456                  var datastring = scoes_nav[launch_sco].url + '&function=scorm_seq_flow&request=backward';
 457                  result = scorm_ajax_request(M.cfg.wwwroot + '/mod/scorm/datamodels/sequencinghandler.php?', datastring);
 458                  mod_scorm_seq = encodeURIComponent(result);
 459                  result = Y.JSON.parse (result);
 460                  if (typeof result.nextactivity.id != undefined) {
 461                          var node = scorm_prev(scorm_tree_node.getSelectedNodes()[0]);
 462                          if (node == null) {
 463                              // Avoid use of TreeView for Navigation.
 464                              node = scorm_tree_node.getSelectedNodes()[0];
 465                          }
 466                          if (node.title !== scoes_nav[result.nextactivity.id].url) {
 467                              node = scorm_tree_node.getNodeByAttribute('title', scoes_nav[result.nextactivity.id].url);
 468                              if (node === null) {
 469                                  node = scorm_tree_node.rootNode.children[0];
 470                                  node.title = scoes_nav[result.nextactivity.id].url;
 471                              }
 472                          }
 473                          launch_sco = result.nextactivity.id;
 474                          scorm_activate_item(node);
 475                          scorm_fixnav();
 476                  } else {
 477                          scorm_activate_item(scorm_prev(scorm_tree_node.getSelectedNodes()[0], true));
 478                  }
 479              } else {
 480                  scorm_activate_item(scorm_prev(scorm_tree_node.getSelectedNodes()[0], true));
 481              }
 482          };
 483  
 484          // Launch next sco
 485          var scorm_launch_next_sco = function () {
 486              var result = null;
 487              if (scoes_nav[launch_sco].flow === 1) {
 488                  var datastring = scoes_nav[launch_sco].url + '&function=scorm_seq_flow&request=forward';
 489                  result = scorm_ajax_request(M.cfg.wwwroot + '/mod/scorm/datamodels/sequencinghandler.php?', datastring);
 490                  mod_scorm_seq = encodeURIComponent(result);
 491                  result = Y.JSON.parse (result);
 492                  if (typeof result.nextactivity !== 'undefined' && typeof result.nextactivity.id !== 'undefined') {
 493                      var node = scorm_next(scorm_tree_node.getSelectedNodes()[0]);
 494                      if (node === null) {
 495                          // Avoid use of TreeView for Navigation.
 496                          node = scorm_tree_node.getSelectedNodes()[0];
 497                      }
 498                      node = scorm_tree_node.getNodeByAttribute('title', scoes_nav[result.nextactivity.id].url);
 499                      if (node === null) {
 500                          node = scorm_tree_node.rootNode.children[0];
 501                          node.title = scoes_nav[result.nextactivity.id].url;
 502                      }
 503                      launch_sco = result.nextactivity.id;
 504                      scorm_activate_item(node);
 505                      scorm_fixnav();
 506                  } else {
 507                      scorm_activate_item(scorm_next(scorm_tree_node.getSelectedNodes()[0], true));
 508                  }
 509              } else {
 510                  scorm_activate_item(scorm_next(scorm_tree_node.getSelectedNodes()[0], true));
 511              }
 512          };
 513  
 514          mod_scorm_launch_prev_sco = scorm_launch_prev_sco;
 515          mod_scorm_launch_next_sco = scorm_launch_next_sco;
 516  
 517          var cssclasses = {
 518                  // YUI grid class: use 100% of the available width to show only content, TOC hidden.
 519                  scorm_grid_content_toc_hidden: 'yui3-u-1',
 520                  // YUI grid class: use 1/5 of the available width to show TOC.
 521                  scorm_grid_toc: 'yui3-u-1-5',
 522                  // YUI grid class: use 1/24 of the available width to show TOC toggle button.
 523                  scorm_grid_toggle: 'yui3-u-1-24',
 524                  // YUI grid class: use 3/4 of the available width to show content, TOC visible.
 525                  scorm_grid_content_toc_visible: 'yui3-u-3-4',
 526                  // Reduce height of #scorm_object to accomodate nav buttons under content.
 527                  scorm_nav_under_content: 'scorm_nav_under_content',
 528                  disabled: 'disabled'
 529              };
 530          // layout
 531          Y.one('#scorm_toc_title').setHTML(toc_title);
 532  
 533          if (scorm_disable_toc) {
 534              Y.one('#scorm_toc').addClass(cssclasses.disabled);
 535              Y.one('#scorm_toc_toggle').addClass(cssclasses.disabled);
 536              Y.one('#scorm_content').addClass(cssclasses.scorm_grid_content_toc_hidden);
 537          } else {
 538              Y.one('#scorm_toc').addClass(cssclasses.scorm_grid_toc);
 539              Y.one('#scorm_toc_toggle').addClass(cssclasses.scorm_grid_toggle);
 540              Y.one('#scorm_toc_toggle_btn')
 541                  .setHTML('&lt;')
 542                  .setAttribute('title', M.util.get_string('hide', 'moodle'));
 543              Y.one('#scorm_content').addClass(cssclasses.scorm_grid_content_toc_visible);
 544              scorm_toggle_toc(true);
 545          }
 546  
 547          // hide the TOC if that is the default
 548          if (!scorm_disable_toc) {
 549              if (scorm_hide_toc == true) {
 550                  Y.one('#scorm_toc').addClass(cssclasses.disabled);
 551                  Y.one('#scorm_toc_toggle_btn')
 552                      .setHTML('&gt;')
 553                      .setAttribute('title', M.util.get_string('show', 'moodle'));
 554                  Y.one('#scorm_content')
 555                      .removeClass(cssclasses.scorm_grid_content_toc_visible)
 556                      .addClass(cssclasses.scorm_grid_content_toc_hidden);
 557              }
 558          }
 559  
 560          // TOC Resize handle.
 561          var layout_width = parseInt(Y.one('#scorm_layout').getComputedStyle('width'), 10);
 562          var scorm_resize_handle = new Y.Resize({
 563              node: '#scorm_toc',
 564              handles: 'r',
 565              defMinWidth: 0.2 * layout_width
 566          });
 567          // TOC tree
 568          var toc_source = Y.one('#scorm_tree > ul');
 569          var toc = scorm_parse_toc_tree(toc_source);
 570          // Empty container after parsing toc.
 571          var el = document.getElementById('scorm_tree');
 572          el.innerHTML = '';
 573          var tree = new Y.TreeView({
 574              container: '#scorm_tree',
 575              nodes: toc,
 576              multiSelect: false
 577          });
 578          scorm_tree_node = tree;
 579          // Trigger after instead of on, avoid recursive calls.
 580          tree.after('select', function(e) {
 581              var node = e.node;
 582              if (node.title == '' || node.title == null) {
 583                  return; //this item has no navigation
 584              }
 585  
 586              // If item is already active, return; avoid recursive calls.
 587              if (obj = Y.one('#scorm_object')) {
 588                  var scorm_active_url = obj.getAttribute('src');
 589                  var node_full_url = M.cfg.wwwroot + '/mod/scorm/loadSCO.php?' + node.title;
 590                  if (node_full_url === scorm_active_url) {
 591                      return;
 592                  }
 593              } else if(scorm_current_node == node){
 594                  return;
 595              }
 596  
 597              // Update launch_sco.
 598              if (typeof node.scoid !== 'undefined') {
 599                  launch_sco = node.scoid;
 600              }
 601              scorm_activate_item(node);
 602              if (node.children.length) {
 603                  scorm_bloody_labelclick = true;
 604              }
 605          });
 606          if (!scorm_disable_toc) {
 607              tree.on('close', function(e) {
 608                  if (scorm_bloody_labelclick) {
 609                      scorm_bloody_labelclick = false;
 610                      return false;
 611                  }
 612              });
 613              tree.subscribe('open', function(e) {
 614                  if (scorm_bloody_labelclick) {
 615                      scorm_bloody_labelclick = false;
 616                      return false;
 617                  }
 618              });
 619          }
 620          tree.render();
 621          tree.openAll();
 622  
 623          // On getting the window, always set the focus on the current item
 624          Y.one(Y.config.win).on('focus', function (e) {
 625              var current = scorm_tree_node.getSelectedNodes()[0];
 626              var toc_disabled = Y.one('#scorm_toc').hasClass('disabled');
 627              if (current.id && !toc_disabled) {
 628                  Y.one('#' + current.id).focus();
 629              }
 630          });
 631  
 632          // navigation
 633          if (scorm_hide_nav == false) {
 634              // TODO: make some better&accessible buttons.
 635              var navbuttonshtml = '<span id="scorm_nav"><button id="nav_skipprev">&lt;&lt;</button>&nbsp;' +
 636                                      '<button id="nav_prev">&lt;</button>&nbsp;<button id="nav_up">^</button>&nbsp;' +
 637                                      '<button id="nav_next">&gt;</button>&nbsp;<button id="nav_skipnext">&gt;&gt;</button></span>';
 638              if (nav_display === 1) {
 639                  Y.one('#scorm_navpanel').setHTML(navbuttonshtml);
 640              } else {
 641                  // Nav panel is floating type.
 642                  var navposition = null;
 643                  if (navposition_left < 0 && navposition_top < 0) {
 644                      // Set default XY.
 645                      navposition = Y.one('#scorm_toc').getXY();
 646                      navposition[1] += 200;
 647                  } else {
 648                      // Set user defined XY.
 649                      navposition = [];
 650                      navposition[0] = parseInt(navposition_left, 10);
 651                      navposition[1] = parseInt(navposition_top, 10);
 652                  }
 653                  scorm_nav_panel = new Y.Panel({
 654                      fillHeight: "body",
 655                      headerContent: M.util.get_string('navigation', 'scorm'),
 656                      visible: true,
 657                      xy: navposition,
 658                      zIndex: 999
 659                  });
 660                  scorm_nav_panel.set('bodyContent', navbuttonshtml);
 661                  scorm_nav_panel.removeButton('close');
 662                  scorm_nav_panel.plug(Y.Plugin.Drag, {handles: ['.yui3-widget-hd']});
 663                  scorm_nav_panel.render();
 664              }
 665  
 666              scorm_buttons[0] = new Y.Button({
 667                  srcNode: '#nav_skipprev',
 668                  render: true,
 669                  on: {
 670                          'click' : function(ev) {
 671                              scorm_activate_item(scorm_skipprev(scorm_tree_node.getSelectedNodes()[0], true));
 672                          },
 673                          'keydown' : function(ev) {
 674                              if (ev.domEvent.keyCode === 13 || ev.domEvent.keyCode === 32) {
 675                                  scorm_activate_item(scorm_skipprev(scorm_tree_node.getSelectedNodes()[0], true));
 676                              }
 677                          }
 678                      }
 679              });
 680              scorm_buttons[1] = new Y.Button({
 681                  srcNode: '#nav_prev',
 682                  render: true,
 683                  on: {
 684                      'click' : function(ev) {
 685                          scorm_launch_prev_sco();
 686                      },
 687                      'keydown' : function(ev) {
 688                          if (ev.domEvent.keyCode === 13 || ev.domEvent.keyCode === 32) {
 689                              scorm_launch_prev_sco();
 690                          }
 691                      }
 692                  }
 693              });
 694              scorm_buttons[2] = new Y.Button({
 695                  srcNode: '#nav_up',
 696                  render: true,
 697                  on: {
 698                      'click' : function(ev) {
 699                          scorm_activate_item(scorm_up(scorm_tree_node.getSelectedNodes()[0], true));
 700                      },
 701                      'keydown' : function(ev) {
 702                          if (ev.domEvent.keyCode === 13 || ev.domEvent.keyCode === 32) {
 703                              scorm_activate_item(scorm_up(scorm_tree_node.getSelectedNodes()[0], true));
 704                          }
 705                      }
 706                  }
 707              });
 708              scorm_buttons[3] = new Y.Button({
 709                  srcNode: '#nav_next',
 710                  render: true,
 711                  on: {
 712                      'click' : function(ev) {
 713                          scorm_launch_next_sco();
 714                      },
 715                      'keydown' : function(ev) {
 716                          if (ev.domEvent.keyCode === 13 || ev.domEvent.keyCode === 32) {
 717                              scorm_launch_next_sco();
 718                          }
 719                      }
 720                  }
 721              });
 722              scorm_buttons[4] = new Y.Button({
 723                  srcNode: '#nav_skipnext',
 724                  render: true,
 725                  on: {
 726                      'click' : function(ev) {
 727                          scorm_activate_item(scorm_skipnext(scorm_tree_node.getSelectedNodes()[0], true));
 728                      },
 729                      'keydown' : function(ev) {
 730                          if (ev.domEvent.keyCode === 13 || ev.domEvent.keyCode === 32) {
 731                              scorm_activate_item(scorm_skipnext(scorm_tree_node.getSelectedNodes()[0], true));
 732                          }
 733                      }
 734                  }
 735              });
 736          }
 737  
 738          // finally activate the chosen item
 739          var scorm_first_url = null;
 740          if (typeof tree.rootNode.children[0] !== 'undefined') {
 741              if (tree.rootNode.children[0].title !== scoes_nav[launch_sco].url) {
 742                  var node = tree.getNodeByAttribute('title', scoes_nav[launch_sco].url);
 743                  if (node !== null) {
 744                      scorm_first_url = node;
 745                  }
 746              } else {
 747                  scorm_first_url = tree.rootNode.children[0];
 748              }
 749          }
 750  
 751          if (scorm_first_url == null) { // This is probably a single sco with no children (AICC Direct uses this).
 752              scorm_first_url = tree.rootNode;
 753          }
 754          scorm_first_url.title = scoes_nav[launch_sco].url;
 755          scorm_activate_item(scorm_first_url);
 756  
 757          // resizing
 758          scorm_resize_layout();
 759  
 760          // Collapse/expand TOC.
 761          Y.one('#scorm_toc_toggle').on('click', scorm_toggle_toc);
 762          Y.one('#scorm_toc_toggle').on('key', scorm_toggle_toc, 'down:enter,32');
 763          // fix layout if window resized
 764          Y.on("windowresize", function() {
 765              scorm_resize_layout();
 766              var toc_displayed = Y.one('#scorm_toc').getComputedStyle('display') !== 'none';
 767              if ((!scorm_disable_toc && !scorm_hide_toc) || toc_displayed) {
 768                  scorm_toggle_toc(true);
 769              }
 770              // Set 20% as minWidth constrain of TOC.
 771              var layout_width = parseInt(Y.one('#scorm_layout').getComputedStyle('width'), 10);
 772              scorm_resize_handle.set('defMinWidth', 0.2 * layout_width);
 773          });
 774          // On resize drag, change width of scorm_content.
 775          scorm_resize_handle.on('resize:resize', function() {
 776              var tocwidth = parseInt(Y.one('#scorm_toc').getComputedStyle('width'), 10);
 777              var layoutwidth = parseInt(Y.one('#scorm_layout').getStyle('width'), 10);
 778              Y.one('#scorm_content').setStyle('width', (layoutwidth - tocwidth - 60));
 779          });
 780      });
 781  };
 782  
 783  M.mod_scorm.connectPrereqCallback = {
 784  
 785      success: function(id, o) {
 786          if (o.responseText !== undefined) {
 787              var snode = null,
 788                  stitle = null;
 789              if (scorm_tree_node && o.responseText) {
 790                  snode = scorm_tree_node.getSelectedNodes()[0];
 791                  stitle = null;
 792                  if (snode) {
 793                      stitle = snode.title;
 794                  }
 795                  // All gone with clear, add new root node.
 796                  scorm_tree_node.clear(scorm_tree_node.createNode());
 797              }
 798              // Make sure the temporary tree element is not there.
 799              var el_old_tree = document.getElementById('scormtree123');
 800              if (el_old_tree) {
 801                  el_old_tree.parentNode.removeChild(el_old_tree);
 802              }
 803              var el_new_tree = document.createElement('div');
 804              var pagecontent = document.getElementById("page-content");
 805              if (!pagecontent) {
 806                  pagecontent = document.getElementById("content");
 807              }
 808              el_new_tree.setAttribute('id','scormtree123');
 809              el_new_tree.innerHTML = o.responseText;
 810              // Make sure it does not show.
 811              el_new_tree.style.display = 'none';
 812              pagecontent.appendChild(el_new_tree);
 813              // Ignore the first level element as this is the title.
 814              var startNode = el_new_tree.firstChild.firstChild;
 815              if (startNode.tagName == 'LI') {
 816                  // Go back to the beginning.
 817                  startNode = el_new_tree;
 818              }
 819              var toc_source = Y.one('#scormtree123 > ul');
 820              var toc = mod_scorm_parse_toc_tree(toc_source);
 821              scorm_tree_node.appendNode(scorm_tree_node.rootNode, toc);
 822              var el = document.getElementById('scormtree123');
 823              el.parentNode.removeChild(el);
 824              scorm_tree_node.render();
 825              scorm_tree_node.openAll();
 826              if (stitle !== null) {
 827                  snode = scorm_tree_node.getNodeByAttribute('title', stitle);
 828                  // Do not let destroyed node to be selected.
 829                  if (snode && !snode.state.destroyed) {
 830                      snode.select();
 831                      var toc_disabled = Y.one('#scorm_toc').hasClass('disabled');
 832                      if (!toc_disabled) {
 833                          if (!snode.state.selected) {
 834                              snode.select();
 835                          }
 836                      }
 837                  }
 838              }
 839          }
 840      },
 841  
 842      failure: function(id, o) {
 843          // TODO: do some sort of error handling.
 844      }
 845  
 846  };