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// 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
    var launch_sco_fix = launch_sco;
44
    if (hide_toc == 0) {
45
        if (nav_display !== 0) {
46
            scorm_hide_nav = false;
47
        }
48
        scorm_hide_toc = false;
49
    } else if (hide_toc == 3) {
50
        scorm_disable_toc = true;
51
    }
52
 
53
    scoes_nav = Y.JSON.parse(scoes_nav);
54
 
55
    var scorm_update_siblings = function (scoesnav) {
56
        for(var key in scoesnav ){
57
            var siblings = [],
58
                parentscoid = key;
59
            for (var mk in scoesnav) {
60
                var val = scoesnav[mk];
61
                if (typeof val !== "undefined" && typeof val.parentscoid !== 'undefined' && val.parentscoid === parentscoid) {
62
                    siblings.push(mk);
63
                }
64
            }
65
            if (siblings.length > 1) {
66
                scoesnav = scorm_get_siblings(scoesnav, siblings);
67
            }
68
        }
69
        return scoesnav;
70
    };
71
 
72
    var scorm_get_siblings = function (scoesnav, siblings) {
73
        siblings.forEach(function (key, index) {
74
            if (index > 0 && typeof scoesnav[key] !== "undefined" && typeof scoesnav[key].prevsibling === "undefined") {
75
                scoesnav[key].prevsibling = siblings[index - 1];
76
            }
77
            if (index < siblings.length - 1 && typeof scoesnav[key] !== "undefined" &&
78
               typeof scoesnav[key].nextsibling === "undefined") {
79
                scoesnav[key].nextsibling = siblings[index + 1];
80
            }
81
        });
82
        return scoesnav;
83
    };
84
 
85
    scoes_nav = scorm_update_siblings(scoes_nav);
86
    var scorm_buttons = [];
87
    var scorm_bloody_labelclick = false;
88
    var scorm_nav_panel;
89
 
90
    Y.use('button', 'dd-plugin', 'panel', 'resize', 'gallery-sm-treeview', function(Y) {
91
 
92
        Y.TreeView.prototype.getNodeByAttribute = function(attribute, value) {
93
            var node = null,
94
                domnode = Y.one('a[' + attribute + '="' + value + '"]');
95
            if (domnode !== null) {
96
                node = scorm_tree_node.getNodeById(domnode.ancestor('li').get('id'));
97
            }
98
            return node;
99
        };
100
 
101
        Y.TreeView.prototype.openAll = function () {
102
            this.get('container').all('.yui3-treeview-can-have-children').each(function(target) {
103
                this.getNodeById(target.get('id')).open();
104
            }, this);
105
        };
106
 
107
        Y.TreeView.prototype.closeAll = function () {
108
            this.get('container').all('.yui3-treeview-can-have-children').each(function(target) {
109
                this.getNodeById(target.get('id')).close();
110
            }, this);
111
        }
112
 
113
        var scorm_parse_toc_tree = function(srcNode) {
114
            var SELECTORS = {
115
                    child: '> li',
116
                    label: '> li, > a',
117
                    textlabel : '> li, > span',
118
                    subtree: '> ul, > li'
119
                },
120
                children = [];
121
 
122
            srcNode.all(SELECTORS.child).each(function(childNode) {
123
                var child = {},
124
                    labelNode = childNode.one(SELECTORS.label),
125
                    textNode = childNode.one(SELECTORS.textlabel),
126
                    subTreeNode = childNode.one(SELECTORS.subtree);
127
 
128
                if (labelNode) {
129
                    var title = labelNode.getAttribute('title');
130
                    var scoid = labelNode.getData('scoid');
131
                    child.label = labelNode.get('outerHTML');
132
                    // Will be good to change to url instead of title.
133
                    if (title && title !== '#') {
134
                        child.title = title;
135
                    }
136
                    if (typeof scoid !== 'undefined') {
137
                        child.scoid = scoid;
138
                    }
139
                } else if (textNode) {
140
                    // The selector did not find a label node with anchor.
141
                    child.label = textNode.get('outerHTML');
142
                }
143
 
144
                if (subTreeNode) {
145
                    child.children = scorm_parse_toc_tree(subTreeNode);
146
                }
147
 
148
                children.push(child);
149
            });
150
 
151
            return children;
152
        };
153
 
154
        mod_scorm_parse_toc_tree = scorm_parse_toc_tree;
155
 
156
        var scorm_activate_item = function(node) {
157
            if (!node) {
158
                return;
159
            }
160
            // Check if the item is already active, avoid recursive calls.
161
            var content = Y.one('#scorm_content');
162
            var old = Y.one('#scorm_object');
163
            if (old) {
164
                var scorm_active_url = Y.one('#scorm_object').getAttribute('src');
165
                var node_full_url = M.cfg.wwwroot + '/mod/scorm/loadSCO.php?' + node.title;
166
                if (node_full_url === scorm_active_url) {
167
                    return;
168
                }
169
                // Start to unload iframe here
170
                if(!window_name){
171
                    content.removeChild(old);
172
                    old = null;
173
                }
174
            }
175
            // End of - Avoid recursive calls.
176
 
177
            scorm_current_node = node;
178
            if (!scorm_current_node.state.selected) {
179
                scorm_current_node.select();
180
            }
181
 
182
            scorm_tree_node.closeAll();
183
            var url_prefix = M.cfg.wwwroot + '/mod/scorm/loadSCO.php?';
184
            var el_old_api = document.getElementById('scormapi123');
185
            if (el_old_api) {
186
                el_old_api.parentNode.removeChild(el_old_api);
187
            }
188
 
189
            var obj = document.createElement('iframe');
190
            obj.setAttribute('id', 'scorm_object');
191
            obj.setAttribute('type', 'text/html');
192
            obj.setAttribute('allowfullscreen', 'allowfullscreen');
193
            obj.setAttribute('webkitallowfullscreen', 'webkitallowfullscreen');
194
            obj.setAttribute('mozallowfullscreen', 'mozallowfullscreen');
195
            if (!window_name && node.title != null) {
196
                obj.setAttribute('src', url_prefix + node.title);
197
            }
198
            // Attach unload observers to the iframe. The scorm package may be observing these unload events
199
            // and trying to save progress when they occur. We need to ensure we use the Beacon API in those
200
            // situations.
201
            if (typeof mod_scorm_monitorForBeaconRequirement !== 'undefined') {
202
                mod_scorm_monitorForBeaconRequirement(obj);
203
            }
204
            if (window_name) {
205
                var mine = window.open('','','width=1,height=1,left=0,top=0,scrollbars=no');
206
                if(! mine) {
207
                    alert(M.util.get_string('popupsblocked', 'scorm'));
208
                }
209
                mine.close();
210
            }
211
 
212
            if (old) {
213
                if(window_name) {
214
                    var cwidth = scormplayerdata.cwidth;
215
                    var cheight = scormplayerdata.cheight;
216
                    var poptions = scormplayerdata.popupoptions;
217
                    poptions = poptions + ',resizable=yes'; // Added for IE (MDL-32506).
218
                    scorm_openpopup(M.cfg.wwwroot + "/mod/scorm/loadSCO.php?" + node.title, window_name, poptions, cwidth, cheight);
219
                }
220
            } else {
221
                content.prepend(obj);
222
            }
223
 
224
            if (scorm_hide_nav == false) {
225
                if (nav_display === 1 && navposition_left > 0 && navposition_top > 0) {
226
                    Y.one('#scorm_object').addClass(cssclasses.scorm_nav_under_content);
227
                }
228
                scorm_fixnav();
229
            }
230
            scorm_tree_node.openAll();
231
        };
232
 
233
        mod_scorm_activate_item = scorm_activate_item;
234
 
235
        /**
236
         * Enables/disables navigation buttons as needed.
237
         * @return void
238
         */
239
        var scorm_fixnav = function() {
240
            launch_sco_fix = launch_sco;
241
            var skipprevnode = scorm_skipprev(scorm_current_node);
242
            var prevnode = scorm_prev(scorm_current_node);
243
            var upnode = scorm_up(scorm_current_node);
244
            var nextnode = scorm_next(scorm_current_node, true, true);
245
            var skipnextnode = scorm_skipnext(scorm_current_node, true, true);
246
 
247
            scorm_buttons[0].set('disabled', ((skipprevnode === null) ||
248
                        (typeof(skipprevnode.scoid) === 'undefined') ||
249
                        (scoes_nav[skipprevnode.scoid].isvisible === "false") ||
250
                        (skipprevnode.title === null) ||
251
                        (scoes_nav[launch_sco].hideprevious === 1)));
252
 
253
            scorm_buttons[1].set('disabled', ((prevnode === null) ||
254
                        (typeof(prevnode.scoid) === 'undefined') ||
255
                        (scoes_nav[prevnode.scoid].isvisible === "false") ||
256
                        (prevnode.title === null) ||
257
                        (scoes_nav[launch_sco].hideprevious === 1)));
258
 
259
            scorm_buttons[2].set('disabled', (upnode === null) ||
260
                        (typeof(upnode.scoid) === 'undefined') ||
261
                        (scoes_nav[upnode.scoid].isvisible === "false") ||
262
                        (upnode.title === null));
263
 
264
            scorm_buttons[3].set('disabled', ((nextnode === null) ||
265
                        ((nextnode.title === null) && (scoes_nav[launch_sco].flow !== 1)) ||
266
                        (typeof(nextnode.scoid) === 'undefined') ||
267
                        (scoes_nav[nextnode.scoid].isvisible === "false") ||
268
                        (scoes_nav[launch_sco].hidecontinue === 1)));
269
 
270
            scorm_buttons[4].set('disabled', ((skipnextnode === null) ||
271
                        (skipnextnode.title === null) ||
272
                        (typeof(skipnextnode.scoid) === 'undefined') ||
273
                        (scoes_nav[skipnextnode.scoid].isvisible === "false") ||
274
                        scoes_nav[launch_sco].hidecontinue === 1));
275
        };
276
 
277
        var scorm_toggle_toc = function(windowresize) {
278
            var toc = Y.one('#scorm_toc');
279
            var scorm_content = Y.one('#scorm_content');
280
            var scorm_toc_toggle_btn = Y.one('#scorm_toc_toggle_btn');
281
            var toc_disabled = toc.hasClass('disabled');
282
            var disabled_by = toc.getAttribute('disabled-by');
283
            // Remove width element style from resize handle.
284
            toc.setStyle('width', null);
285
            scorm_content.setStyle('width', null);
286
            if (windowresize === true) {
287
                if (disabled_by === 'user') {
288
                    return;
289
                }
290
                var body = Y.one('body');
291
                if (body.get('winWidth') < collapsetocwinsize) {
292
                    toc.addClass(cssclasses.disabled)
293
                        .setAttribute('disabled-by', 'screen-size');
294
                    scorm_toc_toggle_btn.setHTML('&gt;')
295
                        .set('title', M.util.get_string('show', 'moodle'));
296
                    scorm_content.removeClass(cssclasses.scorm_grid_content_toc_visible)
297
                        .addClass(cssclasses.scorm_grid_content_toc_hidden);
298
                } else if (body.get('winWidth') > collapsetocwinsize) {
299
                    toc.removeClass(cssclasses.disabled)
300
                        .removeAttribute('disabled-by');
301
                    scorm_toc_toggle_btn.setHTML('&lt;')
302
                        .set('title', M.util.get_string('hide', 'moodle'));
303
                    scorm_content.removeClass(cssclasses.scorm_grid_content_toc_hidden)
304
                        .addClass(cssclasses.scorm_grid_content_toc_visible);
305
                }
306
                return;
307
            }
308
            if (toc_disabled) {
309
                toc.removeClass(cssclasses.disabled)
310
                    .removeAttribute('disabled-by');
311
                scorm_toc_toggle_btn.setHTML('&lt;')
312
                    .set('title', M.util.get_string('hide', 'moodle'));
313
                scorm_content.removeClass(cssclasses.scorm_grid_content_toc_hidden)
314
                    .addClass(cssclasses.scorm_grid_content_toc_visible);
315
            } else {
316
                toc.addClass(cssclasses.disabled)
317
                    .setAttribute('disabled-by', 'user');
318
                scorm_toc_toggle_btn.setHTML('&gt;')
319
                    .set('title', M.util.get_string('show', 'moodle'));
320
                scorm_content.removeClass(cssclasses.scorm_grid_content_toc_visible)
321
                    .addClass(cssclasses.scorm_grid_content_toc_hidden);
322
            }
323
        };
324
 
325
        var scorm_resize_layout = function() {
326
            if (window_name) {
327
                return;
328
            }
329
 
330
            // make sure that the max width of the TOC doesn't go to far
331
 
332
            var scorm_toc_node = Y.one('#scorm_toc');
333
            var maxwidth = parseInt(Y.one('#scorm_layout').getComputedStyle('width'), 10);
334
            scorm_toc_node.setStyle('maxWidth', (maxwidth - 200));
335
            var cwidth = parseInt(scorm_toc_node.getComputedStyle('width'), 10);
336
            if (cwidth > (maxwidth - 1)) {
337
                scorm_toc_node.setStyle('width', (maxwidth - 50));
338
            }
339
 
340
            // Calculate the rough new height from the viewport height.
341
            var newheight = Y.one('body').get('winHeight') - 5
342
                - Y.one('#scorm_layout').getY()
343
                - window.pageYOffset;
344
            if (newheight < 680 || isNaN(newheight)) {
345
                newheight = 680;
346
            }
347
            Y.one('#scorm_layout').setStyle('height', newheight);
348
 
349
        };
350
 
351
        /**
352
         * @deprecated as it is now unused.
353
         * @param {string} url
354
         * @param {string} datastring
355
         * @returns {string|*|boolean}
356
         */
357
        var scorm_ajax_request = function(url, datastring) {
358
            var myRequest = NewHttpReq();
359
            var result = DoRequest(myRequest, url + datastring);
360
            return result;
361
        };
362
 
363
        var scorm_up = function(node, update_launch_sco) {
364
            if (node.parent && node.parent.parent && typeof scoes_nav[launch_sco].parentscoid !== 'undefined') {
365
                var parentscoid = scoes_nav[launch_sco].parentscoid;
366
                var parent = node.parent;
367
                if (parent.title !== scoes_nav[parentscoid].url) {
368
                    parent = scorm_tree_node.getNodeByAttribute('title', scoes_nav[parentscoid].url);
369
                    if (parent === null) {
370
                        parent = scorm_tree_node.rootNode.children[0];
371
                        parent.title = scoes_nav[parentscoid].url;
372
                    }
373
                }
374
                if (update_launch_sco) {
375
                    launch_sco = parentscoid;
376
                }
377
                return parent;
378
            }
379
            return null;
380
        };
381
 
382
        var scorm_lastchild = function(node) {
383
            if (node.children.length) {
384
                return scorm_lastchild(node.children[node.children.length - 1]);
385
            } else {
386
                return node;
387
            }
388
        };
389
 
390
        var scorm_prev = function(node, update_launch_sco) {
391
            if (node.previous() && node.previous().children.length &&
392
                    typeof scoes_nav[launch_sco].prevscoid !== 'undefined') {
393
                node = scorm_lastchild(node.previous());
394
                if (node) {
395
                    var prevscoid = scoes_nav[launch_sco].prevscoid;
396
                    if (node.title !== scoes_nav[prevscoid].url) {
397
                        node = scorm_tree_node.getNodeByAttribute('title', scoes_nav[prevscoid].url);
398
                        if (node === null) {
399
                            node = scorm_tree_node.rootNode.children[0];
400
                            node.title = scoes_nav[prevscoid].url;
401
                        }
402
                    }
403
                    if (update_launch_sco) {
404
                        launch_sco = prevscoid;
405
                    }
406
                    return node;
407
                } else {
408
                    return null;
409
                }
410
            }
411
            return scorm_skipprev(node, update_launch_sco);
412
        };
413
 
414
        var scorm_skipprev = function(node, update_launch_sco) {
415
            if (node.previous() && typeof scoes_nav[launch_sco].prevsibling !== 'undefined') {
416
                var prevsibling = scoes_nav[launch_sco].prevsibling;
417
                var previous = node.previous();
418
                var prevscoid = scoes_nav[launch_sco].prevscoid;
419
                if (previous.title !== scoes_nav[prevscoid].url) {
420
                    previous = scorm_tree_node.getNodeByAttribute('title', scoes_nav[prevsibling].url);
421
                    if (previous === null) {
422
                        previous = scorm_tree_node.rootNode.children[0];
423
                        previous.title = scoes_nav[prevsibling].url;
424
                    }
425
                }
426
                if (update_launch_sco) {
427
                    launch_sco = prevsibling;
428
                }
429
                return previous;
430
            } else if (node.parent && node.parent.parent && typeof scoes_nav[launch_sco].parentscoid !== 'undefined') {
431
                var parentscoid = scoes_nav[launch_sco].parentscoid;
432
                var parent = node.parent;
433
                if (parent.title !== scoes_nav[parentscoid].url) {
434
                    parent = scorm_tree_node.getNodeByAttribute('title', scoes_nav[parentscoid].url);
435
                    if (parent === null) {
436
                        parent = scorm_tree_node.rootNode.children[0];
437
                        parent.title = scoes_nav[parentscoid].url;
438
                    }
439
                }
440
                if (update_launch_sco) {
441
                    launch_sco = parentscoid;
442
                }
443
                return parent;
444
            }
445
            return null;
446
        };
447
 
448
        var scorm_next = function(node, update_launch_sco, test) {
449
            if (node === false) {
450
                return scorm_tree_node.children[0];
451
            }
452
            if (node.children.length && typeof scoes_nav[launch_sco_fix].nextscoid != 'undefined') {
453
                node = node.children[0];
454
                var nextscoid = scoes_nav[launch_sco_fix].nextscoid;
455
                if (node.title !== scoes_nav[nextscoid].url) {
456
                    node = scorm_tree_node.getNodeByAttribute('title', scoes_nav[nextscoid].url);
457
                    if (node === null) {
458
                        node = scorm_tree_node.rootNode.children[0];
459
                        node.title = scoes_nav[nextscoid].url;
460
                    }
461
                }
462
                if (update_launch_sco) {
463
                    launch_sco_fix = nextscoid;
464
                    if (!test) {
465
                        launch_sco = launch_sco_fix;
466
                    }
467
                }
468
                return node;
469
            }
470
            return scorm_skipnext(node, update_launch_sco, test);
471
        };
472
 
473
        var scorm_skipnext = function(node, update_launch_sco, test) {
474
            var next = node.next();
475
            if (next && next.title && typeof scoes_nav[launch_sco_fix] !== 'undefined' &&
476
                        typeof scoes_nav[launch_sco_fix].nextsibling !== 'undefined') {
477
                var nextsibling = scoes_nav[launch_sco_fix].nextsibling;
478
                if (next.title !== scoes_nav[nextsibling].url) {
479
                    next = scorm_tree_node.getNodeByAttribute('title', scoes_nav[nextsibling].url);
480
                    if (next === null) {
481
                        next = scorm_tree_node.rootNode.children[0];
482
                        next.title = scoes_nav[nextsibling].url;
483
                    }
484
                }
485
                if (update_launch_sco) {
486
                    launch_sco_fix = nextsibling;
487
                    if (!test) {
488
                        launch_sco = launch_sco_fix;
489
                    }
490
                }
491
                return next;
492
            } else if (node.parent && node.parent.parent && typeof scoes_nav[launch_sco_fix].parentscoid !== 'undefined') {
493
                var parentscoid = scoes_nav[launch_sco_fix].parentscoid;
494
                var parent = node.parent;
495
                if (parent.title !== scoes_nav[parentscoid].url) {
496
                    parent = scorm_tree_node.getNodeByAttribute('title', scoes_nav[parentscoid].url);
497
                    if (parent === null) {
498
                        parent = scorm_tree_node.rootNode.children[0];
499
                    }
500
                }
501
                if (update_launch_sco) {
502
                    launch_sco_fix = parentscoid;
503
                    if (!test) {
504
                        launch_sco = launch_sco_fix;
505
                    }
506
                }
507
                return scorm_skipnext(parent, update_launch_sco, test);
508
            }
509
            return null;
510
        };
511
 
512
        /**
513
         * Sends a request to the sequencing handler script on the server.
514
         * @param {string} datastring
515
         * @returns {string|boolean|*}
516
         */
517
        var scorm_dorequest_sequencing = function(datastring) {
518
            var myRequest = NewHttpReq();
519
            var result = DoRequest(
520
                myRequest,
521
                M.cfg.wwwroot + '/mod/scorm/datamodels/sequencinghandler.php?' + datastring,
522
                '',
523
                false
524
            );
525
            return result;
526
        };
527
 
528
        // Launch prev sco
529
        var scorm_launch_prev_sco = function() {
530
            var result = null;
531
            if (scoes_nav[launch_sco].flow === 1) {
532
                var datastring = scoes_nav[launch_sco].url + '&function=scorm_seq_flow&request=backward';
533
                result = scorm_dorequest_sequencing(datastring);
534
 
535
                // Check the scorm_ajax_result, it may be false.
536
                if (result === false) {
537
                    // Either the outcome was a failure, or we are unloading and simply just don't know
538
                    // what the outcome actually was.
539
                    result = {};
540
                } else {
541
                    result = Y.JSON.parse(result);
542
                }
543
 
544
                if (typeof result.nextactivity !== 'undefined' && typeof result.nextactivity.id !== 'undefined') {
545
                        var node = scorm_prev(scorm_tree_node.getSelectedNodes()[0]);
546
                        if (node == null) {
547
                            // Avoid use of TreeView for Navigation.
548
                            node = scorm_tree_node.getSelectedNodes()[0];
549
                        }
550
                        if (node.title !== scoes_nav[result.nextactivity.id].url) {
551
                            node = scorm_tree_node.getNodeByAttribute('title', scoes_nav[result.nextactivity.id].url);
552
                            if (node === null) {
553
                                node = scorm_tree_node.rootNode.children[0];
554
                                node.title = scoes_nav[result.nextactivity.id].url;
555
                            }
556
                        }
557
                        launch_sco = result.nextactivity.id;
558
                        scorm_activate_item(node);
559
                        scorm_fixnav();
560
                } else {
561
                        scorm_activate_item(scorm_prev(scorm_tree_node.getSelectedNodes()[0], true));
562
                }
563
            } else {
564
                scorm_activate_item(scorm_prev(scorm_tree_node.getSelectedNodes()[0], true));
565
            }
566
        };
567
 
568
        // Launch next sco
569
        var scorm_launch_next_sco = function () {
570
            launch_sco_fix = launch_sco;
571
            var result = null;
572
            if (scoes_nav[launch_sco].flow === 1) {
573
                var datastring = scoes_nav[launch_sco].url + '&function=scorm_seq_flow&request=forward';
574
                result = scorm_dorequest_sequencing(datastring);
575
 
576
                // Check the scorm_ajax_result, it may be false.
577
                if (result === false) {
578
                    // Either the outcome was a failure, or we are unloading and simply just don't know
579
                    // what the outcome actually was.
580
                    result = {};
581
                } else {
582
                    result = Y.JSON.parse(result);
583
                }
584
 
585
                if (typeof result.nextactivity !== 'undefined' && typeof result.nextactivity.id !== 'undefined') {
586
                    var node = scorm_next(scorm_tree_node.getSelectedNodes()[0]);
587
                    if (node === null) {
588
                        // Avoid use of TreeView for Navigation.
589
                        node = scorm_tree_node.getSelectedNodes()[0];
590
                    }
591
                    node = scorm_tree_node.getNodeByAttribute('title', scoes_nav[result.nextactivity.id].url);
592
                    if (node === null) {
593
                        node = scorm_tree_node.rootNode.children[0];
594
                        node.title = scoes_nav[result.nextactivity.id].url;
595
                    }
596
                    launch_sco = result.nextactivity.id;
597
                    launch_sco_fix = launch_sco;
598
                    scorm_activate_item(node);
599
                    scorm_fixnav();
600
                } else {
601
                    scorm_activate_item(scorm_next(scorm_tree_node.getSelectedNodes()[0], true, false));
602
                }
603
            } else {
604
                scorm_activate_item(scorm_next(scorm_tree_node.getSelectedNodes()[0], true,false));
605
            }
606
        };
607
 
608
        mod_scorm_launch_prev_sco = scorm_launch_prev_sco;
609
        mod_scorm_launch_next_sco = scorm_launch_next_sco;
610
 
611
        var cssclasses = {
612
                // YUI grid class: use 100% of the available width to show only content, TOC hidden.
613
                scorm_grid_content_toc_hidden: 'yui3-u-1',
614
                // YUI grid class: use 1/5 of the available width to show TOC.
615
                scorm_grid_toc: 'yui3-u-1-5',
616
                // YUI grid class: use 1/24 of the available width to show TOC toggle button.
617
                scorm_grid_toggle: 'yui3-u-1-24',
618
                // YUI grid class: use 3/4 of the available width to show content, TOC visible.
619
                scorm_grid_content_toc_visible: 'yui3-u-3-4',
620
                // Reduce height of #scorm_object to accomodate nav buttons under content.
621
                scorm_nav_under_content: 'scorm_nav_under_content',
622
                disabled: 'disabled'
623
            };
624
        // layout
625
        Y.one('#scorm_toc_title').setHTML(toc_title);
626
 
627
        if (scorm_disable_toc) {
628
            Y.one('#scorm_toc').addClass(cssclasses.disabled);
629
            Y.one('#scorm_toc_toggle').addClass(cssclasses.disabled);
630
            Y.one('#scorm_content').addClass(cssclasses.scorm_grid_content_toc_hidden);
631
        } else {
632
            Y.one('#scorm_toc').addClass(cssclasses.scorm_grid_toc);
633
            Y.one('#scorm_toc_toggle').addClass(cssclasses.scorm_grid_toggle);
634
            Y.one('#scorm_toc_toggle_btn')
635
                .setHTML('&lt;')
636
                .setAttribute('title', M.util.get_string('hide', 'moodle'));
637
            Y.one('#scorm_content').addClass(cssclasses.scorm_grid_content_toc_visible);
638
            scorm_toggle_toc(true);
639
        }
640
 
641
        // hide the TOC if that is the default
642
        if (!scorm_disable_toc) {
643
            if (scorm_hide_toc == true) {
644
                Y.one('#scorm_toc').addClass(cssclasses.disabled);
645
                Y.one('#scorm_toc_toggle_btn')
646
                    .setHTML('&gt;')
647
                    .setAttribute('title', M.util.get_string('show', 'moodle'));
648
                Y.one('#scorm_content')
649
                    .removeClass(cssclasses.scorm_grid_content_toc_visible)
650
                    .addClass(cssclasses.scorm_grid_content_toc_hidden);
651
            }
652
        }
653
 
654
        // Basic initialization completed, show the elements.
655
        Y.one('#scorm_toc').removeClass('loading');
656
        Y.one('#scorm_toc_toggle').removeClass('loading');
657
 
658
        // TOC Resize handle.
659
        var layout_width = parseInt(Y.one('#scorm_layout').getComputedStyle('width'), 10);
660
        var scorm_resize_handle = new Y.Resize({
661
            node: '#scorm_toc',
662
            handles: 'r',
663
            defMinWidth: 0.2 * layout_width
664
        });
665
        // TOC tree
666
        var toc_source = Y.one('#scorm_tree > ul');
667
        var toc = scorm_parse_toc_tree(toc_source);
668
        // Empty container after parsing toc.
669
        var el = document.getElementById('scorm_tree');
670
        el.innerHTML = '';
671
        var tree = new Y.TreeView({
672
            container: '#scorm_tree',
673
            nodes: toc,
674
            multiSelect: false,
675
            lazyRender: false
676
        });
677
        scorm_tree_node = tree;
678
        // Trigger after instead of on, avoid recursive calls.
679
        tree.after('select', function(e) {
680
            var node = e.node;
681
            if (node.title == '' || node.title == null) {
682
                return; //this item has no navigation
683
            }
684
 
685
            // If item is already active, return; avoid recursive calls.
686
            if (obj = Y.one('#scorm_object')) {
687
                var scorm_active_url = obj.getAttribute('src');
688
                var node_full_url = M.cfg.wwwroot + '/mod/scorm/loadSCO.php?' + node.title;
689
                if (node_full_url === scorm_active_url) {
690
                    return;
691
                }
692
            } else if(scorm_current_node == node){
693
                return;
694
            }
695
 
696
            // Update launch_sco.
697
            if (typeof node.scoid !== 'undefined') {
698
                launch_sco = node.scoid;
699
            }
700
            scorm_activate_item(node);
701
            if (node.children.length) {
702
                scorm_bloody_labelclick = true;
703
            }
704
        });
705
        if (!scorm_disable_toc) {
706
            tree.on('close', function(e) {
707
                if (scorm_bloody_labelclick) {
708
                    scorm_bloody_labelclick = false;
709
                    return false;
710
                }
711
            });
712
            tree.subscribe('open', function(e) {
713
                if (scorm_bloody_labelclick) {
714
                    scorm_bloody_labelclick = false;
715
                    return false;
716
                }
717
            });
718
        }
719
        tree.render();
720
        tree.openAll();
721
 
722
        // On getting the window, always set the focus on the current item
723
        Y.one(Y.config.win).on('focus', function (e) {
724
            var current = scorm_tree_node.getSelectedNodes()[0];
725
            var toc_disabled = Y.one('#scorm_toc').hasClass('disabled');
726
            if (current.id && !toc_disabled) {
727
                Y.one('#' + current.id).focus();
728
            }
729
        });
730
 
731
        // navigation
732
        if (scorm_hide_nav == false) {
733
            // TODO: make some better&accessible buttons.
734
            var navbuttonshtml = '<span id="scorm_nav"><button id="nav_skipprev">&lt;&lt;</button>&nbsp;' +
735
                                    '<button id="nav_prev">&lt;</button>&nbsp;<button id="nav_up">^</button>&nbsp;' +
736
                                    '<button id="nav_next">&gt;</button>&nbsp;<button id="nav_skipnext">&gt;&gt;</button></span>';
737
            if (nav_display === 1) {
738
                Y.one('#scorm_navpanel').setHTML(navbuttonshtml);
739
            } else {
740
                // Nav panel is floating type.
741
                var navposition = null;
742
                if (navposition_left < 0 && navposition_top < 0) {
743
                    // Set default XY.
744
                    navposition = Y.one('#scorm_toc').getXY();
745
                    navposition[1] += 200;
746
                } else {
747
                    // Set user defined XY.
748
                    navposition = [];
749
                    navposition[0] = parseInt(navposition_left, 10);
750
                    navposition[1] = parseInt(navposition_top, 10);
751
                }
752
                scorm_nav_panel = new Y.Panel({
753
                    fillHeight: "body",
754
                    headerContent: M.util.get_string('navigation', 'scorm'),
755
                    visible: true,
756
                    xy: navposition,
757
                    zIndex: 999
758
                });
759
                scorm_nav_panel.set('bodyContent', navbuttonshtml);
760
                scorm_nav_panel.removeButton('close');
761
                scorm_nav_panel.plug(Y.Plugin.Drag, {handles: ['.yui3-widget-hd']});
762
                scorm_nav_panel.render();
763
            }
764
 
765
            scorm_buttons[0] = new Y.Button({
766
                srcNode: '#nav_skipprev',
767
                render: true,
768
                on: {
769
                        'click' : function(ev) {
770
                            scorm_activate_item(scorm_skipprev(scorm_tree_node.getSelectedNodes()[0], true));
771
                        },
772
                        'keydown' : function(ev) {
773
                            if (ev.domEvent.keyCode === 13 || ev.domEvent.keyCode === 32) {
774
                                scorm_activate_item(scorm_skipprev(scorm_tree_node.getSelectedNodes()[0], true));
775
                            }
776
                        }
777
                    }
778
            });
779
            scorm_buttons[1] = new Y.Button({
780
                srcNode: '#nav_prev',
781
                render: true,
782
                on: {
783
                    'click' : function(ev) {
784
                        scorm_launch_prev_sco();
785
                    },
786
                    'keydown' : function(ev) {
787
                        if (ev.domEvent.keyCode === 13 || ev.domEvent.keyCode === 32) {
788
                            scorm_launch_prev_sco();
789
                        }
790
                    }
791
                }
792
            });
793
            scorm_buttons[2] = new Y.Button({
794
                srcNode: '#nav_up',
795
                render: true,
796
                on: {
797
                    'click' : function(ev) {
798
                        scorm_activate_item(scorm_up(scorm_tree_node.getSelectedNodes()[0], true));
799
                    },
800
                    'keydown' : function(ev) {
801
                        if (ev.domEvent.keyCode === 13 || ev.domEvent.keyCode === 32) {
802
                            scorm_activate_item(scorm_up(scorm_tree_node.getSelectedNodes()[0], true));
803
                        }
804
                    }
805
                }
806
            });
807
            scorm_buttons[3] = new Y.Button({
808
                srcNode: '#nav_next',
809
                render: true,
810
                on: {
811
                    'click' : function(ev) {
812
                        scorm_launch_next_sco();
813
                    },
814
                    'keydown' : function(ev) {
815
                        if (ev.domEvent.keyCode === 13 || ev.domEvent.keyCode === 32) {
816
                            scorm_launch_next_sco();
817
                        }
818
                    }
819
                }
820
            });
821
            scorm_buttons[4] = new Y.Button({
822
                srcNode: '#nav_skipnext',
823
                render: true,
824
                on: {
825
                    'click' : function(ev) {
826
                        launch_sco_fix = launch_sco;
827
                        scorm_activate_item(scorm_skipnext(scorm_tree_node.getSelectedNodes()[0], true, false));
828
                    },
829
                    'keydown' : function(ev) {
830
                        launch_sco_fix = launch_sco;
831
                        if (ev.domEvent.keyCode === 13 || ev.domEvent.keyCode === 32) {
832
                            scorm_activate_item(scorm_skipnext(scorm_tree_node.getSelectedNodes()[0], true, false));
833
                        }
834
                    }
835
                }
836
            });
837
        }
838
 
839
        // finally activate the chosen item
840
        var scorm_first_url = null;
841
        if (typeof tree.rootNode.children[0] !== 'undefined') {
842
            if (tree.rootNode.children[0].title !== scoes_nav[launch_sco].url) {
843
                var node = tree.getNodeByAttribute('title', scoes_nav[launch_sco].url);
844
                if (node !== null) {
845
                    scorm_first_url = node;
846
                }
847
            } else {
848
                scorm_first_url = tree.rootNode.children[0];
849
            }
850
        }
851
 
852
        if (scorm_first_url == null) { // This is probably a single sco with no children (AICC Direct uses this).
853
            scorm_first_url = tree.rootNode;
854
        }
855
        scorm_first_url.title = scoes_nav[launch_sco].url;
856
        scorm_activate_item(scorm_first_url);
857
 
858
        // resizing
859
        scorm_resize_layout();
860
 
861
        // Collapse/expand TOC.
862
        Y.one('#scorm_toc_toggle').on('click', scorm_toggle_toc);
863
        Y.one('#scorm_toc_toggle').on('key', scorm_toggle_toc, 'down:enter,32');
864
        // fix layout if window resized
865
        Y.on("windowresize", function() {
866
            scorm_resize_layout();
867
            var toc_displayed = Y.one('#scorm_toc').getComputedStyle('display') !== 'none';
868
            if ((!scorm_disable_toc && !scorm_hide_toc) || toc_displayed) {
869
                scorm_toggle_toc(true);
870
            }
871
            // Set 20% as minWidth constrain of TOC.
872
            var layout_width = parseInt(Y.one('#scorm_layout').getComputedStyle('width'), 10);
873
            scorm_resize_handle.set('defMinWidth', 0.2 * layout_width);
874
        });
875
        // On resize drag, change width of scorm_content.
876
        scorm_resize_handle.on('resize:resize', function() {
877
            var tocwidth = parseInt(Y.one('#scorm_toc').getComputedStyle('width'), 10);
878
            var layoutwidth = parseInt(Y.one('#scorm_layout').getStyle('width'), 10);
879
            Y.one('#scorm_content').setStyle('width', (layoutwidth - tocwidth - 60));
880
        });
881
    });
882
};
883
 
884
M.mod_scorm.connectPrereqCallback = {
885
 
886
    success: function(id, o) {
887
        if (o.responseText !== undefined) {
888
            var snode = null,
889
                stitle = null;
890
            if (scorm_tree_node && o.responseText) {
891
                snode = scorm_tree_node.getSelectedNodes()[0];
892
                stitle = null;
893
                if (snode) {
894
                    stitle = snode.title;
895
                }
896
                // All gone with clear, add new root node.
897
                scorm_tree_node.clear(scorm_tree_node.createNode());
898
            }
899
            // Make sure the temporary tree element is not there.
900
            var el_old_tree = document.getElementById('scormtree123');
901
            if (el_old_tree) {
902
                el_old_tree.parentNode.removeChild(el_old_tree);
903
            }
904
            var el_new_tree = document.createElement('div');
905
            var pagecontent = document.getElementById("page-content");
906
            if (!pagecontent) {
907
                pagecontent = document.getElementById("content");
908
            }
909
            if (!pagecontent) {
910
                pagecontent = document.getElementById("scormpage");
911
            }
912
            el_new_tree.setAttribute('id','scormtree123');
913
            el_new_tree.innerHTML = o.responseText;
914
            // Make sure it does not show.
915
            el_new_tree.style.display = 'none';
916
            pagecontent.appendChild(el_new_tree);
917
            // Ignore the first level element as this is the title.
918
            var startNode = el_new_tree.firstChild.firstChild;
919
            if (startNode.tagName == 'LI') {
920
                // Go back to the beginning.
921
                startNode = el_new_tree;
922
            }
923
            var toc_source = Y.one('#scormtree123 > ul');
924
            var toc = mod_scorm_parse_toc_tree(toc_source);
925
            scorm_tree_node.appendNode(scorm_tree_node.rootNode, toc);
926
            var el = document.getElementById('scormtree123');
927
            el.parentNode.removeChild(el);
928
            scorm_tree_node.render();
929
            scorm_tree_node.openAll();
930
            if (stitle !== null) {
931
                snode = scorm_tree_node.getNodeByAttribute('title', stitle);
932
                // Do not let destroyed node to be selected.
933
                if (snode && !snode.state.destroyed) {
934
                    snode.select();
935
                    var toc_disabled = Y.one('#scorm_toc').hasClass('disabled');
936
                    if (!toc_disabled) {
937
                        if (!snode.state.selected) {
938
                            snode.select();
939
                        }
940
                    }
941
                }
942
            }
943
        }
944
    },
945
 
946
    failure: function(id, o) {
947
        // TODO: do some sort of error handling.
948
    }
949
 
950
};