summaryrefslogtreecommitdiffstats
path: root/js/field.js
blob: 1cd58a69ac9963d56f4d0ee9e566ad29b45e65ea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This Source Code Form is "Incompatible With Secondary Licenses", as
 * defined by the Mozilla Public License, v. 2.0.
 */

/* This library assumes that the needed YUI libraries have been loaded 
   already. */

var bz_no_validate_enter_bug = false;
function validateEnterBug(theform) {
    // This is for the "bookmarkable templates" button.
    if (bz_no_validate_enter_bug) {
        // Set it back to false for people who hit the "back" button
        bz_no_validate_enter_bug = false;
        return true;
    }

    var component = theform.component;
    var short_desc = theform.short_desc;
    var version = theform.version;
    var bug_status = theform.bug_status;
    var description = theform.comment;
    var attach_data = theform.data;
    var attach_desc = theform.description;

    var current_errors = YAHOO.util.Dom.getElementsByClassName(
        'validation_error_text', null, theform);
    for (var i = 0; i < current_errors.length; i++) {
        current_errors[i].parentNode.removeChild(current_errors[i]);
    }
    var current_error_fields = YAHOO.util.Dom.getElementsByClassName(
        'validation_error_field', null, theform);
    for (var i = 0; i < current_error_fields.length; i++) {
        var field = current_error_fields[i];
        YAHOO.util.Dom.removeClass(field, 'validation_error_field');
    }

    var focus_me;

    // These are checked in the reverse order that they appear on the page,
    // so that the one closest to the top of the form will be focused.
    if (attach_data.value && YAHOO.lang.trim(attach_desc.value) == '') {
        _errorFor(attach_desc, 'attach_desc');
        focus_me = attach_desc;
    }
    // bug_status can be undefined if the bug_status field is not editable by
    // the currently logged in user.
    if (bug_status) {
        var check_description = status_comment_required[bug_status.value];
        if (check_description && YAHOO.lang.trim(description.value) == '') {
            _errorFor(description, 'description');
            focus_me = description;
        }
    }
    if (YAHOO.lang.trim(short_desc.value) == '') {
        _errorFor(short_desc);
        focus_me = short_desc;
    }
    if (version.selectedIndex < 0) {
        _errorFor(version);
        focus_me = version;
    }
    if (component.selectedIndex < 0) {
        _errorFor(component);
        focus_me = component;
    }

    if (focus_me) {
        focus_me.focus();
        return false;
    }

    return true;
}

function _errorFor(field, name) {
    if (!name) name = field.id;
    var string_name = name + '_required';
    var error_text = BUGZILLA.string[string_name];
    var new_node = document.createElement('div');
    YAHOO.util.Dom.addClass(new_node, 'validation_error_text');
    new_node.innerHTML = error_text;
    YAHOO.util.Dom.insertAfter(new_node, field);
    YAHOO.util.Dom.addClass(field, 'validation_error_field');
}

/* This function is never to be called directly, but only indirectly
 * using template/en/default/global/calendar.js.tmpl, so that localization
 * works. For the same reason, if you modify this function's parameter list,
 * you need to modify the documentation in said template as well. */
function createCalendar(name, start_weekday, months_long, weekdays_short) {
    var cal = new YAHOO.widget.Calendar('calendar_' + name, 
                                        'con_calendar_' + name,
                                        { START_WEEKDAY:  start_weekday,
                                          MONTHS_LONG:    months_long,
                                          WEEKDAYS_SHORT: weekdays_short
                                        });
    YAHOO.bugzilla['calendar_' + name] = cal;
    var field = document.getElementById(name);
    cal.selectEvent.subscribe(setFieldFromCalendar, field, false);
    updateCalendarFromField(field);
    cal.render();
}

/* The onclick handlers for the button that shows the calendar. */
function showCalendar(field_name) {
    var calendar  = YAHOO.bugzilla["calendar_" + field_name];
    var field     = document.getElementById(field_name);
    var button    = document.getElementById('button_calendar_' + field_name);

    bz_overlayBelow(calendar.oDomContainer, field);
    calendar.show();
    button.onclick = function() { hideCalendar(field_name); };

    // Because of the way removeListener works, this has to be a function
    // attached directly to this calendar.
    calendar.bz_myBodyCloser = function(event) {
        var container = this.oDomContainer;
        var target    = YAHOO.util.Event.getTarget(event);
        if (target != container && target != button
            && !YAHOO.util.Dom.isAncestor(container, target))
        {
            hideCalendar(field_name);
        }
    };

    // If somebody clicks outside the calendar, hide it.
    YAHOO.util.Event.addListener(document.body, 'click', 
                                 calendar.bz_myBodyCloser, calendar, true);

    // Make Esc close the calendar.
    calendar.bz_escCal = function (event) {
        var key = YAHOO.util.Event.getCharCode(event);
        if (key == 27) {
            hideCalendar(field_name);
        }
    };
    YAHOO.util.Event.addListener(document.body, 'keydown', calendar.bz_escCal);
}

function hideCalendar(field_name) {
    var cal = YAHOO.bugzilla["calendar_" + field_name];
    cal.hide();
    var button = document.getElementById('button_calendar_' + field_name);
    button.onclick = function() { showCalendar(field_name); };
    YAHOO.util.Event.removeListener(document.body, 'click',
                                    cal.bz_myBodyCloser);
    YAHOO.util.Event.removeListener(document.body, 'keydown', cal.bz_escCal);
}

/* This is the selectEvent for our Calendar objects on our custom 
 * DateTime fields.
 */
function setFieldFromCalendar(type, args, date_field) {
    var dates = args[0];
    var setDate = dates[0];

    // We can't just write the date straight into the field, because there 
    // might already be a time there.
    var timeRe = /\b(\d{1,2}):(\d\d)(?::(\d\d))?/;
    var currentTime = timeRe.exec(date_field.value);
    var d = new Date(setDate[0], setDate[1] - 1, setDate[2]);
    if (currentTime) {
        d.setHours(currentTime[1], currentTime[2]);
        if (currentTime[3]) {
            d.setSeconds(currentTime[3]);
        }
    }

    var year = d.getFullYear();
    // JavaScript's "Date" represents January as 0 and December as 11.
    var month = d.getMonth() + 1;
    if (month < 10) month = '0' + String(month);
    var day = d.getDate();
    if (day < 10) day = '0' + String(day);
    var dateStr = year + '-' + month  + '-' + day;

    if (currentTime) {
        var minutes = d.getMinutes();
        if (minutes < 10) minutes = '0' + String(minutes);
        var seconds = d.getSeconds();
        if (seconds > 0 && seconds < 10) {
            seconds = '0' + String(seconds);
        }

        dateStr = dateStr + ' ' + d.getHours() + ':' + minutes;
        if (seconds) dateStr = dateStr + ':' + seconds;
    }

    date_field.value = dateStr;
    hideCalendar(date_field.id);
}

/* Sets the calendar based on the current field value. 
 */ 
function updateCalendarFromField(date_field) {
    var dateRe = /(\d\d\d\d)-(\d\d?)-(\d\d?)/;
    var pieces = dateRe.exec(date_field.value);
    if (pieces) {
        var cal = YAHOO.bugzilla["calendar_" + date_field.id];
        cal.select(new Date(pieces[1], pieces[2] - 1, pieces[3]));
        var selectedArray = cal.getSelectedDates();
        var selected = selectedArray[0];
        cal.cfg.setProperty("pagedate", (selected.getMonth() + 1) + '/' 
                                        + selected.getFullYear());
        cal.render();
    }
}

function setupEditLink(id) {
    var link_container = 'container_showhide_' + id;
    var input_container = 'container_' + id;
    var link = 'showhide_' + id;
    hideEditableField(link_container, input_container, link);
}

/* Hide input/select fields and show the text with (edit) next to it */
function hideEditableField( container, input, action, field_id, original_value, new_value, hide_input ) {
    YAHOO.util.Dom.removeClass(container, 'bz_default_hidden');
    YAHOO.util.Dom.addClass(input, 'bz_default_hidden');
    YAHOO.util.Event.addListener(action, 'click', showEditableField,
                                 new Array(container, input, field_id, new_value));
    if(field_id != ""){
        YAHOO.util.Event.addListener(window, 'load', checkForChangedFieldValues,
                        new Array(container, input, field_id, original_value, hide_input ));
    }
}

/* showEditableField (e, ContainerInputArray)
 * Function hides the (edit) link and the text and displays the input/select field
 *
 * var e: the event
 * var ContainerInputArray: An array containing the (edit) and text area and the input being displayed
 * var ContainerInputArray[0]: the container that will be hidden usually shows the (edit) or (take) text
 * var ContainerInputArray[1]: the input area and label that will be displayed
 * var ContainerInputArray[2]: the input/select field id for which the new value must be set
 * var ContainerInputArray[3]: the new value to set the input/select field to when (take) is clicked
 */
function showEditableField (e, ContainerInputArray) {
    var inputs = new Array();
    var inputArea = YAHOO.util.Dom.get(ContainerInputArray[1]);    
    if ( ! inputArea ){
        YAHOO.util.Event.preventDefault(e);
        return;
    }
    YAHOO.util.Dom.addClass(ContainerInputArray[0], 'bz_default_hidden');
    YAHOO.util.Dom.removeClass(inputArea, 'bz_default_hidden');
    if ( inputArea.tagName.toLowerCase() == "input" ) {
        inputs.push(inputArea);
    } else if (ContainerInputArray[2]) {
        inputs.push(document.getElementById(ContainerInputArray[2]));
    } else {
        inputs = inputArea.getElementsByTagName('input');
    }
    if ( inputs.length > 0 ) {
        // Change the first field's value to ContainerInputArray[2]
        // if present before focusing.
        var type = inputs[0].tagName.toLowerCase();
        if (ContainerInputArray[3]) {
            if ( type == "input" ) {
                inputs[0].value = ContainerInputArray[3];
            } else {
                for (var i = 0; inputs[0].length; i++) {
                    if ( inputs[0].options[i].value == ContainerInputArray[3] ) {
                        inputs[0].options[i].selected = true;
                        break;
                    }
                }
            }
        }
        // focus on the first field, this makes it easier to edit
        inputs[0].focus();
        if ( type == "input" || type == "textarea" ) {
            inputs[0].select();
        }
    }
    YAHOO.util.Event.preventDefault(e);
}


/* checkForChangedFieldValues(e, array )
 * Function checks if after the autocomplete by the browser if the values match the originals.
 *   If they don't match then hide the text and show the input so users don't get confused.
 *
 * var e: the event
 * var ContainerInputArray: An array containing the (edit) and text area and the input being displayed
 * var ContainerInputArray[0]: the conainer that will be hidden usually shows the (edit) text
 * var ContainerInputArray[1]: the input area and label that will be displayed
 * var ContainerInputArray[2]: the field that is on the page, might get changed by browser autocomplete 
 * var ContainerInputArray[3]: the original value from the page loading.
 *
 */  
function checkForChangedFieldValues(e, ContainerInputArray ) {
    var el = document.getElementById(ContainerInputArray[2]);
    var unhide = false;
    if ( el ) {
        if ( !ContainerInputArray[4]
             && (el.value != ContainerInputArray[3]
                 || (el.value == "" && el.id != "qa_contact")) )
        {
            unhide = true;
        }
        else {
            var set_default = document.getElementById("set_default_" +
                                                      ContainerInputArray[2]);
            if ( set_default ) {
                if(set_default.checked){
                    unhide = true;
                }
            }
        }
    }
    if(unhide){
        YAHOO.util.Dom.addClass(ContainerInputArray[0], 'bz_default_hidden');
        YAHOO.util.Dom.removeClass(ContainerInputArray[1], 'bz_default_hidden');
    }

}

function showPeopleOnChange( field_id_list ) {
    for(var i = 0; i < field_id_list.length; i++) {
        YAHOO.util.Event.addListener( field_id_list[i],'change', showEditableField,
                                      new Array('bz_qa_contact_edit_container',
                                                'bz_qa_contact_input'));
        YAHOO.util.Event.addListener( field_id_list[i],'change',showEditableField,
                                      new Array('bz_assignee_edit_container',
                                                'bz_assignee_input'));
    }
}

function assignToDefaultOnChange(field_id_list, default_assignee, default_qa_contact) {
    showPeopleOnChange(field_id_list);
    for(var i = 0, l = field_id_list.length; i < l; i++) {
        YAHOO.util.Event.addListener(field_id_list[i], 'change', function(evt, defaults) {
            if (document.getElementById('assigned_to').value == defaults[0]) {
                setDefaultCheckbox(evt, 'set_default_assignee');
            }
            if (document.getElementById('qa_contact')
                && document.getElementById('qa_contact').value == defaults[1])
            {
                setDefaultCheckbox(evt, 'set_default_qa_contact');
            }
        }, [default_assignee, default_qa_contact]);
    }
}

function initDefaultCheckbox(field_id){
    YAHOO.util.Event.addListener( 'set_default_' + field_id,'change', boldOnChange,
                                  'set_default_' + field_id);
    YAHOO.util.Event.addListener( window,'load', checkForChangedFieldValues,
                                  new Array( 'bz_' + field_id + '_edit_container',
                                             'bz_' + field_id + '_input',
                                             'set_default_' + field_id ,'1'));
    
    YAHOO.util.Event.addListener( window, 'load', boldOnChange,
                                 'set_default_' + field_id ); 
}

function showHideStatusItems(e, dupArrayInfo) {
    var el = document.getElementById('bug_status');
    // finish doing stuff based on the selection.
    if ( el ) {
        showDuplicateItem(el);

        // Make sure that fields whose visibility or values are controlled
        // by "resolution" behave properly when resolution is hidden.
        var resolution = document.getElementById('resolution');
        if (resolution && resolution.options[0].value != '') {
            resolution.bz_lastSelected = resolution.selectedIndex;
            var emptyOption = new Option('', '');
            resolution.insertBefore(emptyOption, resolution.options[0]);
            emptyOption.selected = true;
        }
        YAHOO.util.Dom.addClass('resolution_settings', 'bz_default_hidden');
        if (document.getElementById('resolution_settings_warning')) {
            YAHOO.util.Dom.addClass('resolution_settings_warning',
                                    'bz_default_hidden');
        }
        YAHOO.util.Dom.addClass('duplicate_display', 'bz_default_hidden');


        if ( (el.value == dupArrayInfo[1] && dupArrayInfo[0] == "is_duplicate")
             || bz_isValueInArray(close_status_array, el.value) ) 
        {
            YAHOO.util.Dom.removeClass('resolution_settings', 
                                       'bz_default_hidden');
            YAHOO.util.Dom.removeClass('resolution_settings_warning', 
                                       'bz_default_hidden');

            // Remove the blank option we inserted.
            if (resolution && resolution.options[0].value == '') {
                resolution.removeChild(resolution.options[0]);
                resolution.selectedIndex = resolution.bz_lastSelected;
            }
        }

        if (resolution) {
            bz_fireEvent(resolution, 'change');
        }
    }
}

function showDuplicateItem(e) {
    var resolution = document.getElementById('resolution');
    var bug_status = document.getElementById('bug_status');
    var dup_id = document.getElementById('dup_id');
    if (resolution) {
        if (resolution.value == 'DUPLICATE' && bz_isValueInArray( close_status_array, bug_status.value) ) {
            // hide resolution show duplicate
            YAHOO.util.Dom.removeClass('duplicate_settings', 
                                       'bz_default_hidden');
            YAHOO.util.Dom.addClass('dup_id_discoverable', 'bz_default_hidden');
            // check to make sure the field is visible or IE throws errors
            if( ! YAHOO.util.Dom.hasClass( dup_id, 'bz_default_hidden' ) ){
                dup_id.focus();
                dup_id.select();
            }
        }
        else {
            YAHOO.util.Dom.addClass('duplicate_settings', 'bz_default_hidden');
            YAHOO.util.Dom.removeClass('dup_id_discoverable', 
                                       'bz_default_hidden');
            dup_id.blur();
        }
    }
    YAHOO.util.Event.preventDefault(e); //prevents the hyperlink from going to the url in the href.
}

function setResolutionToDuplicate(e, duplicate_or_move_bug_status) {
    var status = document.getElementById('bug_status');
    var resolution = document.getElementById('resolution');
    YAHOO.util.Dom.addClass('dup_id_discoverable', 'bz_default_hidden');
    status.value = duplicate_or_move_bug_status;
    bz_fireEvent(status, 'change');
    resolution.value = "DUPLICATE";
    bz_fireEvent(resolution, 'change');
    YAHOO.util.Event.preventDefault(e);
}

function setDefaultCheckbox(e, field_id) {
    var el = document.getElementById(field_id);
    var elLabel = document.getElementById(field_id + "_label");
    if( el && elLabel ) {
        el.checked = "true";
        YAHOO.util.Dom.setStyle(elLabel, 'font-weight', 'bold');
    }
}

function boldOnChange(e, field_id){
    var el = document.getElementById(field_id);
    var elLabel = document.getElementById(field_id + "_label");
    if( el && elLabel ) {
        if( el.checked ){
            YAHOO.util.Dom.setStyle(elLabel, 'font-weight', 'bold');
        }
        else{
            YAHOO.util.Dom.setStyle(elLabel, 'font-weight', 'normal');
        }
    }
}

function updateCommentTagControl(checkbox, field) {
    if (checkbox.checked) {
        YAHOO.util.Dom.addClass(field, 'bz_private');
    } else {
        YAHOO.util.Dom.removeClass(field, 'bz_private');
    }
}

/**
 * Reset the value of the classification field and fire an event change
 * on it.  Called when the product changes, in case the classification
 * field (which is hidden) controls the visibility of any other fields.
 */
function setClassification() {
    var classification = document.getElementById('classification');
    var product = document.getElementById('product');
    var selected_product = product.value; 
    var select_classification = all_classifications[selected_product];
    classification.value = select_classification;
    bz_fireEvent(classification, 'change');
}

/**
 * Says that a field should only be displayed when another field has
 * a certain value. May only be called after the controller has already
 * been added to the DOM.
 */
function showFieldWhen(controlled_id, controller_id, values) {
    var controller = document.getElementById(controller_id);
    // Note that we don't get an object for "controlled" here, because it
    // might not yet exist in the DOM. We just pass along its id.
    YAHOO.util.Event.addListener(controller, 'change',
        handleVisControllerValueChange, [controlled_id, controller, values]);
}

/**
 * Called by showFieldWhen when a field's visibility controller 
 * changes values. 
 */
function handleVisControllerValueChange(e, args) {
    var controlled_id = args[0];
    var controller = args[1];
    var values = args[2];

    var label_container = 
        document.getElementById('field_label_' + controlled_id);
    var field_container =
        document.getElementById('field_container_' + controlled_id);
    var selected = false;
    for (var i = 0; i < values.length; i++) {
        if (bz_valueSelected(controller, values[i])) {
            selected = true;
            break;
        }
    }

    if (selected) {
        YAHOO.util.Dom.removeClass(label_container, 'bz_hidden_field');
        YAHOO.util.Dom.removeClass(field_container, 'bz_hidden_field');
    }
    else {
        YAHOO.util.Dom.addClass(label_container, 'bz_hidden_field');
        YAHOO.util.Dom.addClass(field_container, 'bz_hidden_field');
    }
}

/**
 * This is a data structure representing the tree of controlled values.
 * Let's call the "controller value" the "source" and the "controlled
 * value" the "target". A target can have only one source, but a source
 * can have an infinite number of targets.
 *
 * The data structure is a series of hash tables that go something
 * like this:
 *
 * source_field -> target_field -> source_value_id -> target_value_ids
 *
 * We always know source_field when our event handler is called, since
 * that's the field the event is being triggered on. We can then enumerate
 * through every target field, check the status of each source field value,
 * and act appropriately on each target value.
 */
var bz_value_controllers = {};
// This keeps track of whether or not we've added an onchange handler
// for the source field yet.
var bz_value_controller_has_handler = {};
function showValueWhen(target_field_id, target_value_ids,
                       source_field_id, source_value_id, empty_shows_all)
{
    if (!bz_value_controllers[source_field_id]) {
        bz_value_controllers[source_field_id] = {};
    }
    if (!bz_value_controllers[source_field_id][target_field_id]) {
        bz_value_controllers[source_field_id][target_field_id] = {};
    }
    var source_values = bz_value_controllers[source_field_id][target_field_id];
    source_values[source_value_id] = target_value_ids;

    if (!bz_value_controller_has_handler[source_field_id]) {
        var source_field = document.getElementById(source_field_id);
        YAHOO.util.Event.addListener(source_field, 'change',
            handleValControllerChange, [source_field, empty_shows_all]);
        bz_value_controller_has_handler[source_field_id] = true;
    }
}

function handleValControllerChange(e, args) {
    var source = args[0];
    var empty_shows_all = args[1];

    for (var target_field_id in bz_value_controllers[source.id]) {
        var target = document.getElementById(target_field_id);
        if (!target) continue;
        _update_displayed_values(source, target, empty_shows_all);
    }
}

/* See the docs for bz_option_duplicate count lower down for an explanation
 * of this data structure.
 */
var bz_option_hide_count = {};

function _update_displayed_values(source, target, empty_shows_all) {
    var show_all = (empty_shows_all && source.selectedIndex == -1);

    bz_option_hide_count[target.id] = {};

    var source_values = bz_value_controllers[source.id][target.id];
    for (source_value_id in source_values) {
        var source_option = getPossiblyHiddenOption(source, source_value_id);
        var target_values = source_values[source_value_id];
        for (var i = 0; i < target_values.length; i++) {
            var target_value_id = target_values[i];
            _handle_source_target(source_option, target, target_value_id,
                                  show_all);
        }
    }

    // We may have updated which elements are selected or not selected
    // in the target field, and it may have handlers associated with
    // that, so we need to fire the change event on the target.
    bz_fireEvent(target, 'change');
}

function _handle_source_target(source_option, target, target_value_id,
                               show_all)
{
    var target_option = getPossiblyHiddenOption(target, target_value_id);

    // We always call either _show_option or _hide_option on every single
    // target value. Although this is not theoretically the most efficient
    // thing we can do, it handles all possible edge cases, and there are
    // a lot of those, particularly when this code is being used on the
    // search form.
    if (source_option.selected || (show_all && !source_option.disabled)) {
        _show_option(target_option, target);
    }
    else {
        _hide_option(target_option, target);
    }
}

/* When an option has duplicates (see the docs for bz_option_duplicates
 * lower down in this file), we only want to hide it if *all* the duplicates
 * would be hidden. So we keep a counter of how many duplicates each option
 * has. Then, when we run through a "change" call for a source field,
 * we count how many times each value gets hidden, and only actually
 * hide it if the counter hits a number higher than the duplicate count.
 */
var bz_option_duplicate_count = {};

function _show_option(option, field) {
    if (!option.disabled) return;
    option = showOptionInIE(option, field);
    YAHOO.util.Dom.removeClass(option, 'bz_hidden_option');
    option.disabled = false;
}

function _hide_option(option, field) {
    if (option.disabled) return;

    var value_id = option.bz_value_id;

    if (field.id in bz_option_duplicate_count
        && value_id in bz_option_duplicate_count[field.id])
    {
        if (!bz_option_hide_count[field.id][value_id]) {
            bz_option_hide_count[field.id][value_id] = 0;
        }
        bz_option_hide_count[field.id][value_id]++;
        var current = bz_option_hide_count[field.id][value_id];
        var dups    = bz_option_duplicate_count[field.id][value_id];
        // We check <= because the value in bz_option_duplicate_count is
        // 1 less than the total number of duplicates (since the shown
        // option is also a "duplicate" but not counted in
        // bz_option_duplicate_count).
        if (current <= dups) return;
    }

    YAHOO.util.Dom.addClass(option, 'bz_hidden_option');
    option.selected = false;
    option.disabled = true;
    hideOptionInIE(option, field);
}

// A convenience function to generate the "id" tag of an <option>
// based on the numeric id that Bugzilla uses for that value.
function _value_id(field_name, id) {
    return 'v' + id + '_' + field_name;
}

/*********************************/
/* Code for Hiding Options in IE */
/*********************************/

/* IE 7 and below (and some other browsers) don't respond to "display: none"
 * on <option> tags. However, you *can* insert a Comment Node as a
 * child of a <select> tag. So we just insert a Comment where the <option>
 * used to be. */
var ie_hidden_options = {};
function hideOptionInIE(anOption, aSelect) {
    if (browserCanHideOptions(aSelect)) return;

    var commentNode = document.createComment(anOption.value);
    commentNode.id = anOption.id;
    // This keeps the interface of Comments and Options the same for
    // our other functions.
    commentNode.disabled = true;
    // replaceChild is very slow on IE in a <select> that has a lot of
    // options, so we use replaceNode when we can.
    if (anOption.replaceNode) {
        anOption.replaceNode(commentNode);
    }
    else {
        aSelect.replaceChild(commentNode, anOption);
    }

    // Store the comment node for quick access for getPossiblyHiddenOption
    if (!ie_hidden_options[aSelect.id]) {
        ie_hidden_options[aSelect.id] = {};
    }
    ie_hidden_options[aSelect.id][anOption.id] = commentNode;
}

function showOptionInIE(aNode, aSelect) {
    if (browserCanHideOptions(aSelect)) return aNode;

    // We do this crazy thing with innerHTML and createElement because
    // this is the ONLY WAY that this works properly in IE.
    var optionNode = document.createElement('option');
    optionNode.innerHTML = aNode.data;
    optionNode.value = aNode.data;
    optionNode.id = aNode.id;
    // replaceChild is very slow on IE in a <select> that has a lot of
    // options, so we use replaceNode when we can.
    if (aNode.replaceNode) {
        aNode.replaceNode(optionNode);
    }
    else {
        aSelect.replaceChild(optionNode, aNode);
    }
    delete ie_hidden_options[aSelect.id][optionNode.id];
    return optionNode;
}

function initHidingOptionsForIE(select_name) {
    var aSelect = document.getElementById(select_name);
    if (browserCanHideOptions(aSelect)) return;
    if (!aSelect) return;

    for (var i = 0; ;i++) {
        var item = aSelect.options[i];
        if (!item) break;
        if (item.disabled) {
          hideOptionInIE(item, aSelect);
          i--; // Hiding an option means that the options array has changed.
        }
    }
}

/* Certain fields, like the Component field, have duplicate values in
 * them (the same name, but different ids). We don't display these
 * duplicate values in the UI, but the option hiding/showing code still
 * uses the ids of these unshown duplicates. So, whenever we get the
 * id of an unshown duplicate in getPossiblyHiddenOption, we have to
 * return the actually-used <option> instead.
 *
 * The structure of the data looks like:
 *
 *  field_name -> unshown_value_id -> shown_value_id_it_is_a_duplicate_of
 */
var bz_option_duplicates = {};

function getPossiblyHiddenOption(aSelect, optionId) {

    if (bz_option_duplicates[aSelect.id]
        && bz_option_duplicates[aSelect.id][optionId])
    {
        optionId = bz_option_duplicates[aSelect.id][optionId];
    }

    // Works always for <option> tags, and works for commentNodes
    // in IE (but not in Webkit).
    var id = _value_id(aSelect.id, optionId);
    var val = document.getElementById(id);

    // This is for WebKit and other browsers that can't "display: none"
    // an <option> and also can't getElementById for a commentNode.
    if (!val && ie_hidden_options[aSelect.id]) {
        val = ie_hidden_options[aSelect.id][id];
    }

    // We add this property for our own convenience, it's used in
    // other places.
    val.bz_value_id = optionId;

    return val;
}

var browser_can_hide_options;
function browserCanHideOptions(aSelect) {
    /* As far as I can tell, browsers that don't hide <option> tags
     * also never have a X position for <option> tags, even if
     * they're visible. This is the only reliable way I found to
     * differentiate browsers. So we create a visible option, see
     * if it has a position, and then remove it. */
    if (typeof(browser_can_hide_options) == "undefined") {
        var new_opt = bz_createOptionInSelect(aSelect, '', '');
        var opt_pos = YAHOO.util.Dom.getX(new_opt);
        aSelect.removeChild(new_opt);
        if (opt_pos) {
            browser_can_hide_options = true;
        }
        else {
            browser_can_hide_options = false;
        }
    }
    return browser_can_hide_options;
}

/* (end) option hiding code */

/**
 * The Autoselect
 */
YAHOO.bugzilla.userAutocomplete = {
    counter : 0,
    dataSource : null,
    generateRequest : function ( enteredText ){ 
      YAHOO.bugzilla.userAutocomplete.counter = 
                                   YAHOO.bugzilla.userAutocomplete.counter + 1;
      YAHOO.util.Connect.setDefaultPostHeader('application/json', true);
      var json_object = {
          method : "User.get",
          id : YAHOO.bugzilla.userAutocomplete.counter,
          params : [ { 
            Bugzilla_api_token: BUGZILLA.api_token,
            match : [ decodeURIComponent(enteredText) ],
            include_fields : [ "name", "real_name" ]
          } ]
      };
      var stringified =  YAHOO.lang.JSON.stringify(json_object);
      var debug = { msg: "json-rpc obj debug info", "json obj": json_object, 
                    "param" : stringified}
      YAHOO.bugzilla.userAutocomplete.debug_helper( debug );
      return stringified;
    },
    resultListFormat : function(oResultData, enteredText, sResultMatch) {
        return ( YAHOO.lang.escapeHTML(oResultData.real_name) + " ("
                 + YAHOO.lang.escapeHTML(oResultData.name) + ")");
    },
    debug_helper : function ( ){
        /* used to help debug any errors that might happen */
        if( typeof(console) !== 'undefined' && console != null && arguments.length > 0 ){
            console.log("debug helper info:", arguments);
        }
        return true;
    },    
    init_ds : function(){
        this.dataSource = new YAHOO.util.XHRDataSource("jsonrpc.cgi");
        this.dataSource.connTimeout = 30000;
        this.dataSource.connMethodPost = true;
        this.dataSource.connXhrMode = "cancelStaleRequests";
        this.dataSource.maxCacheEntries = 5;
        this.dataSource.responseSchema = {
            resultsList : "result.users",
            metaFields : { error: "error", jsonRpcId: "id"},
            fields : [
                { key : "name" },
                { key : "real_name"}
            ]
        };
    },
    init : function( field, container, multiple ) {
        if( this.dataSource == null ){
            this.init_ds();  
        }            
        var userAutoComp = new YAHOO.widget.AutoComplete( field, container, 
                                this.dataSource );
        // other stuff we might want to do with the autocomplete goes here
        userAutoComp.maxResultsDisplayed = BUGZILLA.param.maxusermatches;
        userAutoComp.generateRequest = this.generateRequest;
        userAutoComp.formatResult = this.resultListFormat;
        userAutoComp.doBeforeLoadData = this.debug_helper;
        userAutoComp.minQueryLength = 3;
        userAutoComp.autoHighlight = false;
        // this is a throttle to determine the delay of the query from typing
        // set this higher to cause fewer calls to the server
        userAutoComp.queryDelay = 0.05;
        userAutoComp.useIFrame = true;
        userAutoComp.resultTypeList = false;
        if( multiple == true ){
            userAutoComp.delimChar = [","];
        }
        
    }
};

YAHOO.bugzilla.fieldAutocomplete = {
    dataSource : [],
    init_ds : function( field ) {
        this.dataSource[field] =
          new YAHOO.util.LocalDataSource( YAHOO.bugzilla.field_array[field] );
    },
    init : function( field, container ) {
        if( this.dataSource[field] == null ) {
            this.init_ds( field );
        }
        var fieldAutoComp =
          new YAHOO.widget.AutoComplete(field, container, this.dataSource[field]);
        fieldAutoComp.maxResultsDisplayed = YAHOO.bugzilla.field_array[field].length;
        fieldAutoComp.formatResult = fieldAutoComp.formatEscapedResult;
        fieldAutoComp.minQueryLength = 0;
        fieldAutoComp.useIFrame = true;
        fieldAutoComp.delimChar = [","," "];
        fieldAutoComp.resultTypeList = false;
        fieldAutoComp.queryDelay = 0;
        /*  Causes all the possibilities in the field to appear when a user
         *  focuses on the textbox 
         */
        fieldAutoComp.textboxFocusEvent.subscribe( function(){
            var sInputValue = YAHOO.util.Dom.get(field).value;
            if( sInputValue.length === 0
                && YAHOO.bugzilla.field_array[field].length > 0 ){
                this.sendQuery(sInputValue);
                this.collapseContainer();
                this.expandContainer();
            }
        });
        fieldAutoComp.dataRequestEvent.subscribe( function(type, args) {
            args[0].autoHighlight = args[1] != '';
        });
    }
};

/**
 * Set the disable email checkbox to true if the user has disabled text
 */
function userDisabledTextOnChange(disabledtext) {
    var disable_mail = document.getElementById('disable_mail');
    if (disabledtext.value === "" && !disable_mail_manually_set) {
        disable_mail.checked = false;
    }
    if (disabledtext.value !== "" && !disable_mail_manually_set) {
        disable_mail.checked = true;
    }
}

/**
 * Force the browser to honour the selected option when a page is refreshed,
 * but only if the user hasn't explicitly selected a different option.
 */
function initDirtyFieldTracking() {
    // old IE versions don't provide the information we need to make this fix work
    // however they aren't affected by this issue, so it's ok to ignore them
    if (YAHOO.env.ua.ie > 0 && YAHOO.env.ua.ie <= 8) return;
    var selects = document.getElementById('changeform').getElementsByTagName('select');
    for (var i = 0, l = selects.length; i < l; i++) {
        var el = selects[i];
        var el_dirty = document.getElementById(el.name + '_dirty');
        if (!el_dirty) continue;
        if (!el_dirty.value) {
            var preSelected = bz_preselectedOptions(el);
            if (!el.multiple) {
                preSelected.selected = true;
            } else {
                el.selectedIndex = -1;
                for (var j = 0, m = preSelected.length; j < m; j++) {
                    preSelected[j].selected = true;
                }
            }
        }
        YAHOO.util.Event.on(el, "change", function(e) {
            var el = e.target || e.srcElement;
            var preSelected = bz_preselectedOptions(el);
            var currentSelected = bz_selectedOptions(el);
            var isDirty = false;
            if (!el.multiple) {
                isDirty = preSelected.index != currentSelected.index;
            } else {
                if (preSelected.length != currentSelected.length) {
                    isDirty = true;
                } else {
                    for (var i = 0, l = preSelected.length; i < l; i++) {
                        if (currentSelected[i].index != preSelected[i].index) {
                            isDirty = true;
                            break;
                        }
                    }
                }
            }
            document.getElementById(el.name + '_dirty').value = isDirty ? '1' : '';
        });
    }
}

/**
 * Comment preview
 */

var last_comment_text = '';
var last_markdown_cb_value = null;

function show_comment_preview(bug_id) {
    var Dom = YAHOO.util.Dom;
    var comment = document.getElementById('comment');
    var preview = document.getElementById('comment_preview');
    var markdown_cb = document.getElementById('use_markdown');

    if (!comment || !preview) return;
    if (Dom.hasClass('comment_preview_tab', 'active_comment_tab')) return;

    preview.style.width = (comment.clientWidth - 4) + 'px';
    preview.style.height = comment.offsetHeight + 'px';

    var comment_tab = document.getElementById('comment_tab');
    Dom.addClass(comment, 'bz_default_hidden');
    Dom.removeClass(comment_tab, 'active_comment_tab');
    comment_tab.setAttribute('aria-selected', 'false');

    var preview_tab = document.getElementById('comment_preview_tab');
    Dom.removeClass(preview, 'bz_default_hidden');
    Dom.addClass(preview_tab, 'active_comment_tab');
    preview_tab.setAttribute('aria-selected', 'true');

    Dom.addClass('comment_preview_error', 'bz_default_hidden');

    if (last_comment_text == comment.value && last_markdown_cb_value == markdown_cb.checked)
        return;

    Dom.addClass('comment_preview_text', 'bz_default_hidden');
    Dom.removeClass('comment_preview_loading', 'bz_default_hidden');

    YAHOO.util.Connect.setDefaultPostHeader('application/json', true);
    YAHOO.util.Connect.asyncRequest('POST', 'jsonrpc.cgi',
    {
        success: function(res) {
            data = YAHOO.lang.JSON.parse(res.responseText);
            if (data.error) {
                Dom.addClass('comment_preview_loading', 'bz_default_hidden');
                Dom.removeClass('comment_preview_error', 'bz_default_hidden');
                Dom.get('comment_preview_error').innerHTML =
                    YAHOO.lang.escapeHTML(data.error.message);
            } else {
                document.getElementById('comment_preview_text').innerHTML = data.result.html;
                Dom.addClass('comment_preview_loading', 'bz_default_hidden');
                Dom.removeClass('comment_preview_text', 'bz_default_hidden');
                last_comment_text = comment.value;
                last_markdown_cb_value = markdown_cb.checked;
            }
        },
        failure: function(res) {
            Dom.addClass('comment_preview_loading', 'bz_default_hidden');
            Dom.removeClass('comment_preview_error', 'bz_default_hidden');
            Dom.get('comment_preview_error').innerHTML =
                YAHOO.lang.escapeHTML(res.responseText);
        }
    },
    YAHOO.lang.JSON.stringify({
        version: "1.1",
        method: 'Bug.render_comment',
        params: {
            Bugzilla_api_token: BUGZILLA.api_token,
            id: bug_id,
            text: comment.value,
            markdown: (markdown_cb != null) && markdown_cb.checked ? 1 : 0
        }
    })
    );
}

function show_comment_edit() {
    var comment = document.getElementById('comment');
    var preview = document.getElementById('comment_preview');
    if (!comment || !preview) return;
    if (YAHOO.util.Dom.hasClass(comment, 'active_comment_tab')) return;

    var preview_tab = document.getElementById('comment_preview_tab');
    YAHOO.util.Dom.addClass(preview, 'bz_default_hidden');
    YAHOO.util.Dom.removeClass(preview_tab, 'active_comment_tab');
    preview_tab.setAttribute('aria-selected', 'false');

    var comment_tab = document.getElementById('comment_tab');
    YAHOO.util.Dom.removeClass(comment, 'bz_default_hidden');
    YAHOO.util.Dom.addClass(comment_tab, 'active_comment_tab');
    comment_tab.setAttribute('aria-selected', 'true');
}

function adjustRemainingTime() {
    // subtracts time spent from remaining time
    // prevent negative values if work_time > bz_remaining_time
    var new_time = Math.max(bz_remaining_time - document.changeform.work_time.value, 0.0);
    // get upto 2 decimal places
    document.changeform.remaining_time.value = Math.round(new_time * 100)/100;
}

function updateRemainingTime() {
    // if the remaining time is changed manually, update bz_remaining_time
    bz_remaining_time = document.changeform.remaining_time.value;
}