summaryrefslogtreecommitdiffstats
path: root/rulemgt-frontend/src/assets/common/js/jquery.sly.js
blob: ce3390ff4e78c1fd0e674338ef5238750d750caf (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
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
/*!
 * jQuery Sly v0.9.6
 * https://github.com/Darsain/sly
 *
 * Licensed under the MIT license.
 * http://www.opensource.org/licenses/MIT
 */

/*jshint eqeqeq: true, noempty: true, strict: true, undef: true, expr: true, smarttabs: true, browser: true */
/*global jQuery:false */

;(function($, undefined){
'use strict';

// Plugin names
var pluginName = 'sly',
	namespace = 'plugin_' + pluginName;

/**
 * Plugin class
 *
 * @class
 * @param {Element} frame DOM element of sly container
 * @param {Object}  o Object with plugin options
 */
function Plugin( frame, o ){

	// Alias for this
	var self = this,

	// Frame variables
		$frame = $(frame),
		$slidee = $frame.children().eq(0),
		frameSize = 0,
		slideeSize = 0,
		pos = {
			cur: 0,
			max: 0,
			min: 0
		},

	// Scrollbar variables
		$sb = $(o.scrollBar).eq(0),
		$handle = $sb.length ? $sb.children().eq(0) : 0,
		sbSize = 0,
		handleSize = 0,
		hPos = {
			cur: 0,
			max: 0,
			min: 0
		},

	// Pagesbar variables
		$pb = $(o.pagesBar),
		$pages = 0,
		pages = [],

	// Navigation type booleans
		basicNav = o.itemNav === 'basic',
		smartNav = o.itemNav === 'smart',
		forceCenteredNav = o.itemNav === 'forceCentered',
		centeredNav = o.itemNav === 'centered' || forceCenteredNav,
		itemNav = basicNav || smartNav || centeredNav || forceCenteredNav,

	// Other variables
		$items = 0,
		items = [],
		rel = {
			firstItem: 0,
			lastItem: 1,
			centerItem: 1,
			activeItem: -1,
			activePage: 0,
			items: 0,
			pages: 0
		},
		$scrollSource = o.scrollSource ? $( o.scrollSource ) : $frame,
		$dragSource = o.dragSource ? $( o.dragSource ) : $frame,
		$prevButton = $(o.prev),
		$nextButton = $(o.next),
		$prevPageButton = $(o.prevPage),
		$nextPageButton = $(o.nextPage),
		cycleIndex = 0,
		cycleIsPaused = 0,
		isDragging = 0,
		callbacks = {};


	/**
	 * (Re)Loading function
	 *
	 * Populates arrays, sets sizes, binds events, ...
	 *
	 * @public
	 */
	var load = this.reload = function(){

		// Local variables
		var ignoredMargin = 0,
			oldPos = $.extend({}, pos);

		// Clear cycling timeout
		clearTimeout( cycleIndex );

		// Reset global variables
		frameSize = o.horizontal ? $frame.width() : $frame.height();
		sbSize = o.horizontal ? $sb.width() : $sb.height();
		slideeSize = o.horizontal ? $slidee.outerWidth() : $slidee.outerHeight();
		$items = $slidee.children();
		items = [];
		pages = [];

		// Set position limits & relatives
		pos.min = 0;
		pos.max = slideeSize > frameSize ? slideeSize - frameSize : 0;
		rel.items = $items.length;

		// Sizes & offsets logic, but only when needed
		if( itemNav ){

			var marginStart = getPx( $items, o.horizontal ? 'marginLeft' : 'marginTop' ),
				marginEnd = getPx( $items.slice(-1), o.horizontal ? 'marginRight' : 'marginBottom' ),
				centerOffset = 0,
				paddingStart = getPx( $slidee, o.horizontal ? 'paddingLeft' : 'paddingTop' ),
				paddingEnd = getPx( $slidee, o.horizontal ? 'paddingRight' : 'paddingBottom' ),
				areFloated = $items.css('float') !== 'none';

			// Update ignored margin
			ignoredMargin = marginStart ? 0 : marginEnd;

			// Reset slideeSize
			slideeSize = 0;

			// Iterate through items
			$items.each(function(i,e){

				// Item
				var item = $(e),
					itemSize = o.horizontal ? item.outerWidth(true) : item.outerHeight(true),
					marginTop    = getPx( item, 'marginTop' ),
					marginBottom = getPx( item, 'marginBottom'),
					marginLeft   = getPx( item, 'marginLeft'),
					marginRight  = getPx( item, 'marginRight'),
					itemObj = {
						size: itemSize,
						offStart: slideeSize - ( !i || o.horizontal ? 0 : marginTop ),
						offCenter: slideeSize - Math.round( frameSize / 2 - itemSize / 2 ),
						offEnd: slideeSize - frameSize + itemSize - ( marginStart ? 0 : marginRight ),
						margins: {
							top:    marginTop,
							bottom: marginBottom,
							left:   marginLeft,
							right:  marginRight
						}
					};

				// Account for centerOffset & slidee padding
				if( !i ){
					centerOffset = -( forceCenteredNav ? Math.round( frameSize / 2 - itemSize / 2 ) : 0 ) + paddingStart;
					slideeSize += paddingStart;
				}

				// Increment slidee size for size of the active element
				slideeSize += itemSize;

				// Try to account for vertical margin collapsing in vertical mode
				// It's not bulletproof, but should work in 99% of cases
				if( !o.horizontal && !areFloated ){

					// Subtract smaller margin, but only when top margin is not 0, and this is not the first element
					if( marginBottom && marginTop && i > 0 ){
						slideeSize -= marginTop < marginBottom ? marginTop : marginBottom;
					}

				}

				// Things to be done at last item
				if( i === $items.length - 1 ){
					slideeSize += paddingEnd;
				}

				// Add item object to items array
				items.push(itemObj);

			});

			// Resize slidee
			$slidee.css( o.horizontal ? { width: slideeSize+'px' } : { height: slideeSize+'px' } );

			// Adjust slidee size for last margin
			slideeSize -= ignoredMargin;

			// Set limits
			pos.min = centerOffset;
			pos.max = forceCenteredNav ? items[items.length-1].offCenter : slideeSize > frameSize ? slideeSize - frameSize : 0;

			// Fix overflowing activeItem
			rel.activeItem >= items.length && self.activate( items.length-1 );

		}

		// Assign relative position indexes
		assignRelatives();

		// Scrollbar
		if( $handle ){

			// Stretch scrollbar handle to represent the visible area
			handleSize = o.dynamicHandle ? Math.round( sbSize * frameSize / slideeSize ) : o.horizontal ? $handle.width() : $handle.height();
			handleSize = handleSize > sbSize ? sbSize : handleSize;
			handleSize = handleSize < o.minHandleSize ? o.minHandleSize : handleSize;
			hPos.max = sbSize - handleSize;

			// Resize handle
			$handle.css( o.horizontal ? { width: handleSize+'px' } : { height: handleSize+'px' } );

		}

		// Pages
		var tempPagePos = 0,
			pagesHtml = '',
			pageIndex = 0;

		// Populate pages array
		if( forceCenteredNav ){
			pages = $.map( items, function( o ){ return o.offCenter; } );
		} else {
			while( tempPagePos - frameSize < pos.max ){

				var pagePos = tempPagePos > pos.max ? pos.max : tempPagePos;

				pages.push( pagePos );
				tempPagePos += frameSize;

				// When item navigation, and last page is smaller than half of the last item size,
				// adjust the last page position to pos.max and break the loop
				if( tempPagePos > pos.max && itemNav && pos.max - pagePos < ( items[items.length-1].size - ignoredMargin ) / 2 ){

					pages[pages.length-1] = pos.max;
					break;

				}

			}
		}

		// Pages bar
		if( $pb.length ){

			for( var i = 0; i < pages.length; i++ ){
				pagesHtml += o.pageBuilder( pageIndex++ );
			}

			// Bind page navigation, append to pagesbar, and save to $pages variable
			$pages = $(pagesHtml).bind('click.' + namespace, function(){

				self.activatePage( $pages.index(this) );

			}).appendTo( $pb.empty() );

		}

		// Bind activating to items
		$items.unbind('.' + namespace).bind('mouseup.' + namespace, function(e){

			e.which === 1 && !isDragging && self.activate( this );

		});

		// Fix overflowing
		pos.cur < pos.min && slide( pos.min );
		pos.cur > pos.max && slide( pos.max );

		// Extend relative variables object with some useful info
		rel.pages = pages.length;
		rel.slideeSize = slideeSize;
		rel.frameSize = frameSize;
		rel.sbSize = sbSize;
		rel.handleSize = handleSize;

		// Synchronize scrollbar
		syncBars(0);

		// Disable buttons
		disableButtons();

		// Automatic cycling
		if( itemNav && o.cycleBy ){

			var pauseEvents = 'mouseenter.' + namespace + ' mouseleave.' + namespace;

			// Pause on hover
			o.pauseOnHover && $frame.unbind(pauseEvents).bind(pauseEvents, function(e){

				!cycleIsPaused && self.cycle( e.type === 'mouseenter', 1 );

			});

			// Initiate cycling
			self.cycle( o.startPaused );

		}

		// Trigger :load event
		$frame.trigger( pluginName + ':load', [ $.extend({}, pos, { old: oldPos }), $items, rel ] );

	};


	/**
	 * Slide the slidee
	 *
	 * @private
	 *
	 * @param {Int} newPos New slidee position in relation to frame
	 * @param {Bool} align  Whetner to Align elements to the frame border
	 * @param {Int} speed  Animation speed in milliseconds
	 */
	function slide( newPos, align, speed ){

		speed = isNumber( speed ) ? speed : o.speed;

		// Align items
		if( align && itemNav ){

			var tempRel = getRelatives( newPos );

			if( centeredNav ){

				newPos = items[tempRel.centerItem].offCenter;
				self[ forceCenteredNav ? 'activate' : 'toCenter']( tempRel.centerItem, 1 );

			} else if( newPos > pos.min && newPos < pos.max ){

				newPos = items[tempRel.firstItem].offStart;

			}

		}

		// Fix overflowing position
		if( !isDragging || !o.elasticBounds ){
			newPos = newPos < pos.min ? pos.min : newPos;
			newPos = newPos > pos.max ? pos.max : newPos;
		}

		// Stop if position has not changed
		if( newPos === pos.cur ) {
			return;
		} else {
			pos.cur = newPos;
		}

		// Reassign relative indexes
		assignRelatives();

		// Add disabled classes
		disableButtons();

		// halt ongoing animations
		stop();

		// Trigger :move event
		!isDragging && $frame.trigger( pluginName + ':move', [ pos, $items, rel ] );

		var newProp = o.horizontal ? { left: -pos.cur+'px' } : { top: -pos.cur+'px' };

		// Slidee move
		if( speed > 16 ){

			$slidee.animate( newProp, speed, isDragging ? 'swing' : o.easing, function(e){

				// Trigger :moveEnd event
				!isDragging && $frame.trigger( pluginName + ':moveEnd', [ pos, $items, rel ] );

			});

		} else {

			$slidee.css( newProp );

			// Trigger :moveEnd event
			!isDragging && $frame.trigger( pluginName + ':moveEnd', [ pos, $items, rel ] );

		}

	}


	/**
	 * Synchronizes scrollbar & pagesbar positions with the slidee
	 *
	 * @private
	 *
	 * @param {Int} speed Animation speed for scrollbar synchronization
	 */
	function syncBars( speed ){

		// Scrollbar synchronization
		if ($handle) {

			hPos.cur = Math.round( ( pos.cur - pos.min ) / ( pos.max - pos.min ) * hPos.max );
			hPos.cur = hPos.cur < hPos.min ? hPos.min : hPos.cur > hPos.max ? hPos.max : hPos.cur;
			$handle.stop().animate( o.horizontal ? { left: hPos.cur+'px' } : { top: hPos.cur+'px' }, isNumber(speed) ? speed : o.speed, o.easing );

		}

		// Pagesbar synchronization
		syncPages();

	}


	/**
	 * Synchronizes pagesbar
	 *
	 * @private
	 */
	function syncPages(){

		if (!$pages.length) {
			return;
		}

		// Classes
		$pages.removeClass(o.activeClass).eq(rel.activePage).addClass(o.activeClass);

	}


	/**
	 * Activate previous item
	 *
	 * @public
	 */
	this.prev = function(){

		self.activate( rel.activeItem - 1 );

	};


	/**
	 * Activate next item
	 *
	 * @public
	 */
	this.next = function(){

		self.activate( rel.activeItem + 1 );

	};


	/**
	 * Activate previous page
	 *
	 * @public
	 */
	this.prevPage = function(){

		self.activatePage( rel.activePage - 1 );

	};


	/**
	 * Activate next page
	 *
	 * @public
	 */
	this.nextPage = function(){

		self.activatePage( rel.activePage + 1 );

	};


	/**
	 * Stop ongoing animations
	 *
	 * @private
	 */
	function stop(){

		$slidee.add($handle).stop();

	}


	/**
	 * Animate element or the whole slidee to the start of the frame
	 *
	 * @public
	 *
	 * @param {Element|Int} el DOM element, or index of element in items array
	 */
	this.toStart = function( el ){

		if( itemNav ){

			var index = getIndex( el );

			if( el === undefined ){

				slide( pos.min, 1 );

			} else if( index !== -1 ){

				// You can't align items to the start of the frame when centeredNav is enabled
				if (centeredNav) {
					return;
				}

				index !== -1 && slide( items[index].offStart );

			}

		} else {

			if( el === undefined ){

				slide( pos.min );

			} else {

				var $el = $slidee.find(el).eq(0);

				if( $el.length ){

					var offset = o.horizontal ? $el.offset().left - $slidee.offset().left : $el.offset().top - $slidee.offset().top;

					slide( offset );

				}

			}

		}

		syncBars();

	};


	/**
	 * Animate element or the whole slidee to the end of the frame
	 *
	 * @public
	 *
	 * @param {Element|Int} el DOM element, or index of element in items array
	 */
	this.toEnd = function( el ){

		if( itemNav ){

			var index = getIndex( el );

			if( el === undefined ){

				slide( pos.max, 1 );

			} else if( index !== -1 ){

				// You can't align items to the end of the frame when centeredNav is enabled
				if (centeredNav) {
					return;
				}

				slide( items[index].offEnd );

			}

		} else {

			if( el === undefined ){

				slide( pos.max );

			} else {

				var $el = $slidee.find(el).eq(0);

				if( $el.length ){

					var offset = o.horizontal ? $el.offset().left - $slidee.offset().left : $el.offset().top - $slidee.offset().top;

					slide( offset - frameSize + $el[o.horizontal ? 'outerWidth' : 'outerHeight']() );

				}

			}

		}

		syncBars();

	};


	/**
	 * Animate element or the whole slidee to the center of the frame
	 *
	 * @public
	 *
	 * @param {Element|Int} el DOM element, or index of element in items array
	 */
	this.toCenter = function( el ){

		if( itemNav ){

			var index = getIndex( el );

			if( el === undefined ){

				slide( Math.round( pos.max / 2 + pos.min / 2 ), 1 );

			} else if( index !== -1 ){

				slide( items[index].offCenter );
				forceCenteredNav && self.activate( index, 1 );

			}

		} else {

			if( el === undefined ){

				slide( Math.round( pos.max / 2 ) );

			} else {

				var $el = $slidee.find(el).eq(0);

				if( $el.length ){

					var offset = o.horizontal ? $el.offset().left - $slidee.offset().left : $el.offset().top - $slidee.offset().top;

					slide( offset - frameSize / 2 + $el[o.horizontal ? 'outerWidth' : 'outerHeight']() / 2 );

				}

			}


		}

		syncBars();

	};


	/**
	 * Get an index of the element
	 *
	 * @private
	 *
	 * @param {Element|Int} el DOM element, or index of element in items array
	 */
	function getIndex( el ){

		return isNumber(el) ? el < 0 ? 0 : el > items.length-1 ? items.length-1 : el : el === undefined ? -1 : $items.index( el );

	}


	/**
	 * Parse style to pixels
	 *
	 * @private
	 *
	 * @param {Object} $item jQuery object with element
	 * @param {Property} property Property to get the pixels from
	 */
	function getPx( $item, property ){

		return parseInt( $item.css( property ), 10 );

	}


	/**
	 * Activates an element
	 *
	 * Element is positioned to one of the sides of the frame, based on it's current position.
	 * If the element is close to the right frame border, it will be animated to the start of the left border,
	 * and vice versa. This helps user to navigate through the elements only by clicking on them, without
	 * the need for navigation buttons, scrolling, or keyboard arrows.
	 *
	 * @public
	 *
	 * @param {Element|Int} el DOM element, or index of element in items array
	 * @param {Bool} noReposition Activate item without repositioning it
	 */
	this.activate = function( el, noReposition ){

		if (!itemNav || el === undefined) {
			return;
		}

		var index = getIndex( el ),
			oldActive = rel.activeItem;

		// Update activeItem index
		rel.activeItem = index;

		// Add active class to the active element
		$items.removeClass(o.activeClass).eq(index).addClass(o.activeClass);

		// Trigget :active event if a new element is being activated
		index !== oldActive && $items.eq( index ).trigger( pluginName + ':active', [ $items, rel ] );

		if( !noReposition ){

			// When centeredNav is enabled, center the element
			if( centeredNav ){

				self.toCenter( index );

			// Otherwise determine where to position the element
			} else if( smartNav ) {

				// If activated element is currently on the far right side of the frame, assume that
				// user is moving forward and animate it to the start of the visible frame, and vice versa
				if (index >= rel.lastItem) {
					self.toStart(index);
				} else if (index <= rel.firstItem) {
					self.toEnd(index);
				}

			}

		}

		// Add disabled classes
		disableButtons();

	};


	/**
	 * Activates a page
	 *
	 * @public
	 *
	 * @param {Int} index Page index, starting from 0
	 */
	this.activatePage = function( index ){

		// Fix overflowing
		index = index < 0 ? 0 : index >= pages.length ? pages.length-1 : index;
		slide( pages[index], itemNav );

		syncBars();

	};


	/**
	 * Return relative positions of items based on their location within visible frame
	 *
	 * @private
	 *
	 * @param {Int} sPos Position of slidee
	 */
	function getRelatives( sPos ){

		var newRel = {},
			centerOffset = forceCenteredNav ? 0 : frameSize / 2;

		// Determine active page
		for( var p = 0; p < pages.length; p++ ){

			if( sPos >= pos.max || p === pages.length - 1 ){
				newRel.activePage = pages.length - 1;
				break;
			}

			if( sPos <= pages[p] + centerOffset ){
				newRel.activePage = p;
				break;
			}

		}

		// Relative item indexes
		if( itemNav ){

			var first  = false,
				last   = false,
				center = false;

			/* From start */
			for( var i=0; i < items.length; i++ ){

				// First item
				if (first === false && sPos <= items[i].offStart) {
					first = i;
				}

				// Centered item
				if (center === false && sPos - items[i].size / 2 <= items[i].offCenter) {
					center = i;
				}

				// Last item
				if (i === items.length - 1 || (last === false && sPos < items[i + 1].offEnd)) {
					last = i;
				}

				// Terminate if all are assigned
				if (last !== false) {
					break;
				}

			}

			// Safe assignment, just to be sure the false won't be returned
			newRel.firstItem  = isNumber( first )  ? first  : 0;
			newRel.centerItem = isNumber( center ) ? center : newRel.firstItem;
			newRel.lastItem   = isNumber( last )   ? last   : newRel.centerItem;

		}

		return newRel;

	}


	/**
	 * Assign element indexes to the relative positions
	 *
	 * @private
	 */
	function assignRelatives(){

		$.extend( rel, getRelatives( pos.cur ) );

	}


	/**
	 * Disable buttons when needed
	 *
	 * Adds disabledClass, and when the button is <button> or <input>,
	 * activates :disabled state
	 *
	 * @private
	 */
	function disableButtons(){

		// item navigation
		if( itemNav ){

			var isFirstItem = rel.activeItem === 0,
				isLastItem = rel.activeItem >= items.length-1;

			if( $prevButton.is('button,input') ){
				$prevButton.prop('disabled', isFirstItem);
			}

			if( $nextButton.is('button,input') ){
				$nextButton.prop('disabled', isLastItem);
			}

			$prevButton[ isFirstItem ? 'removeClass' : 'addClass'](o.disabledClass);
			$nextButton[ isLastItem ? 'removeClass' : 'addClass'](o.disabledClass);

		}

		// pages navigation
		if( $pages.length ){

			var isStart = pos.cur <= pos.min,
				isEnd = pos.cur >= pos.max;

			if( $prevPageButton.is('button,input') ){
				$prevPageButton.prop('disabled', isStart);
			}

			if( $nextPageButton.is('button,input') ){
				$nextPageButton.prop('disabled', isEnd);
			}

			$prevPageButton[ isStart ? 'removeClass' : 'addClass'](o.disabledClass);
			$nextPageButton[ isEnd ? 'removeClass' : 'addClass'](o.disabledClass);

		}

	}


	/**
	 * Manage cycling
	 *
	 * @public
	 *
	 * @param {Bool} pause Pass true to pause cycling
	 * @param {Bool} soft Soft pause intended for pauseOnHover - won't set cycleIsPaused variable to true
	 */
	this.cycle = function( pause, soft ){

		if (!itemNav || !o.cycleBy) {
			return;
		}

		if( !soft ){
			cycleIsPaused = !!pause;
		}

		if( pause ){

			if( cycleIndex ){

				cycleIndex = clearTimeout( cycleIndex );

				// Trigger :cyclePause event
				$frame.trigger( pluginName + ':cyclePause', [ pos, $items, rel ] );

			}

		} else {

			// Don't initiate more than one cycle
			if (cycleIndex) {
				return;
			}

			// Trigger :cycleStart event
			$frame.trigger( pluginName + ':cycleStart', [ pos, $items, rel ] );

			// Cycling loop
			(function loop(){

				if( o.cycleInterval === 0 ){
					return;
				}

				cycleIndex = setTimeout( function(){

					if( !isDragging ){
						switch( o.cycleBy ){

							case 'items':
								var nextItem = rel.activeItem >= items.length-1 ? 0 : rel.activeItem + 1;
								self.activate( nextItem );
							break;

							case 'pages':
								var nextPage = rel.activePage >= pages.length-1 ? 0 : rel.activePage + 1;
								self.activatePage( nextPage );
							break;

						}
					}

					// Trigger :cycle event
					$frame.trigger( pluginName + ':cycle', [ pos, $items, rel ] );

					// Cycle the cycle!
					loop();

				}, o.cycleInterval );

			}());

		}

	};


	/**
	 * Crossbrowser reliable way to stop default event action
	 *
	 * @private
	 *
	 * @param {Event} e Event object
	 * @param {Bool} noBubbles Cancel event bubbling
	 */
	function stopDefault( e, noBubbles ){

		var evt = e || window.event;
		evt.preventDefault ? evt.preventDefault() : evt.returnValue = false;
		noBubbles && evt.stopPropagation ? evt.stopPropagation() : evt.cancelBubble = true;

	}


	/**
	 * Updates a signle or multiple option values
	 *
	 * @param {Mixed} property Option property name that should be updated, or object with options that will extend the current one
	 * @param {Mixed} value    Option property value
	 *
	 * @public
	 */
	this.set = function( property, value ){

		if( $.isPlainObject(property) ){

			o = $.extend({}, o, property);

		} else if( typeof property === 'string' ) {

			o[property] = value;

		}

	};


	/**
	 * Destroys plugin instance and everything it created
	 *
	 * @public
	 */
	this.destroy = function(){

		// Unbind all events
		$frame.add(document).add($slidee).add($items).add($scrollSource).add($handle)
		.add($prevButton).add($nextButton).add($prevPageButton).add($nextPageButton)
		.unbind('.' + namespace);

		// Reset some styles
		$slidee.add($handle).css( o.horizontal ? { left: 0 } : { top: 0 } );

		// Remove plugin classes
		$prevButton.add($nextButton).removeClass(o.disabledClass);

		// Remove page items
		$pb.empty();

		// Remove plugin from element data storage
		$.removeData(frame, namespace);

	};


	/**
	 * Check if variable is a number
	 *
	 * @param {Mixed} n Any type of variable
	 *
	 * @return {Boolean}
	 */
	function isNumber( n ) {
		return !isNaN(parseFloat(n)) && isFinite(n);
	}


	/** Constructor */
	(function(){

		var doc = $(document),
			dragEvents = 'mousemove.' + namespace + ' mouseup.' + namespace;

		// Extend options
		o = $.extend( {}, $.fn[pluginName].defaults, o );

		// Set required styles to elements
		$frame.css({ overflow: 'hidden' }).css('position') === 'static' && $frame.css({ position: 'relative' });
		$sb.css('position') === 'static' && $sb.css({ position: 'relative' });
		$slidee.add($handle).css( o.horizontal ? { position: 'absolute', left: 0 } : { position: 'absolute', top: 0 } );

		// Load
		load();

		// Activate requested position
		itemNav ? self.activate( o.startAt ) : slide( o.startAt );

		// Sync scrollbar & pages
		syncBars();

		// Scrolling navigation
		o.scrollBy && $scrollSource.bind('DOMMouseScroll.' + namespace + ' mousewheel.' + namespace, function(e){

			// If there is no scrolling to be done, leave the default event alone
			if (pos.min === pos.max) {
				return;
			}

			stopDefault( e, 1 );

			var orgEvent = e.originalEvent,
				delta = 0,
				isForward, nextItem;

			// Old school scrollwheel delta
			if ( orgEvent.wheelDelta ){ delta = orgEvent.wheelDelta / 120; }
			if ( orgEvent.detail     ){ delta = -orgEvent.detail / 3; }

			isForward = delta < 0;

			if( itemNav ){

				nextItem = getIndex( ( centeredNav ? forceCenteredNav ? rel.activeItem : rel.centerItem : rel.firstItem ) + ( isForward ? o.scrollBy : -o.scrollBy ) );

				self[centeredNav ? forceCenteredNav ? 'activate' : 'toCenter' : 'toStart']( nextItem );

			} else {

				slide( pos.cur + ( isForward ? o.scrollBy : -o.scrollBy ) );

			}

			syncBars();

		});

		// Keyboard navigation
		o.keyboardNav && doc.bind('keydown.' + namespace, function(e){

			switch( e.keyCode || e.which ){

				// Left or Up
				case o.horizontal ? 37 : 38:

					stopDefault(e);
					o.keyboardNavByPages ? self.prevPage() : self.prev();

				break;

				// Right or Down
				case o.horizontal ? 39 : 40:

					stopDefault(e);
					o.keyboardNavByPages ? self.nextPage() : self.next();

				break;

			}

		});

		// Navigation buttons
		o.prev && $prevButton.bind('click.' + namespace, function(e){ stopDefault(e); self.prev(); });
		o.next && $nextButton.bind('click.' + namespace, function(e){ stopDefault(e); self.next(); });
		o.prevPage && $prevPageButton.bind('click.' + namespace, function(e){ stopDefault(e); self.prevPage(); });
		o.nextPage && $nextPageButton.bind('click.' + namespace, function(e){ stopDefault(e); self.nextPage(); });

		// Dragging navigation
		o.dragContent && $dragSource.bind('mousedown.' + namespace, function(e){

			// Ignore other than left mouse button
			if (e.which !== 1) {
				return;
			}

			stopDefault(e);

			var leftInit = e.clientX,
				topInit = e.clientY,
				posInit = pos.cur,
				start = +new Date(),
				srcEl = e.target,
				easeoff = 0,
				isInitialized = 0;

			// Add dragging class
			$slidee.addClass(o.draggedClass);

			// Stop potential ongoing animations
			stop();

			// Bind dragging events
			doc.bind(dragEvents, function(e){

				var released = e.type === 'mouseup',
					path = o.horizontal ? e.clientX - leftInit : e.clientY - topInit,
					newPos = posInit - path;

				// Initialized logic
				if( !isInitialized && Math.abs( path ) > 10 ){

					isInitialized = 1;

					// Trigger :dragStart event
					$slidee.trigger( pluginName + ':dragStart', [ pos ] );

				}

				// Limits & Elastic bounds
				if( newPos > pos.max ){
					newPos = o.elasticBounds ? pos.max + ( newPos - pos.max ) / 6 : pos.max;
				} else if( newPos < pos.min ){
					newPos = o.elasticBounds ? pos.min + ( newPos - pos.min ) / 6 : pos.min;
				}

				// Adjust newPos with easing when content has been released
				if( released ){

					// Cleanup
					doc.unbind(dragEvents);
					$slidee.removeClass(o.draggedClass);

					// How long was the dragging
					var time = +new Date() - start;

					// Calculate swing length
					var swing = time < 300 ? Math.ceil( Math.pow( 6 / ( time / 300 ) , 2 ) * Math.abs( path ) / 120 ) : 0;
					newPos += path > 0 ? -swing : swing;

				}

				// Drag only when isInitialized
				if (!isInitialized) {
					return;
				}

				stopDefault(e);

				// Stop default click action on source element
				if( srcEl ){

					$(srcEl).bind('click.' + namespace, function stopMe(e){

						stopDefault(e,true);
						$(this).unbind('click.' + namespace, stopMe);

					});

					srcEl = 0;

				}

				// Dragging state
				isDragging = !released;

				// Animage, synch bars, & align
				slide( newPos, released, released ? o.speed : 0 );
				syncBars( released ? null : 0 );

				// Trigger :drag event
				if (isInitialized) {
					$slidee.trigger(pluginName + ':drag', [pos]);
				}

				// Trigger :dragEnd event
				if (released) {
					$slidee.trigger(pluginName + ':dragEnd', [pos]);
				}

			});

		});

		// Scrollbar navigation
		$handle && o.dragHandle && $handle.bind('mousedown.' + namespace, function(e){

			// Ignore other than left mouse button
			if (e.which !== 1) {
				return;
			}

			stopDefault(e);

			var leftInit = e.clientX,
				topInit = e.clientY,
				posInit = hPos.cur,
				pathMin = -hPos.cur,
				pathMax = hPos.max - hPos.cur,
				nextDrag = 0;

			// Add dragging class
			$handle.addClass(o.draggedClass);

			// Stop potential ongoing animations
			stop();

			// Bind dragging events
			doc.bind(dragEvents, function(e){

				stopDefault(e);

				var released = e.type === 'mouseup',
					path = o.horizontal ? e.clientX - leftInit : e.clientY - topInit,
					newPos = posInit + path,
					time = +new Date();

				// Dragging state
				isDragging = !released;

				// Unbind events and remove classes when released
				if( released ){

					doc.unbind(dragEvents);
					$handle.removeClass(o.draggedClass);

				}

				// Execute only moves within path limits
				if( path < pathMax+5 && path > pathMin-5 || released ){

					// Fix overflows
					hPos.cur = newPos > hPos.max ? hPos.max : newPos < hPos.min ? hPos.min : newPos;

					// Move handle
					$handle.stop().css( o.horizontal ? { left: hPos.cur+'px' } : { top: hPos.cur+'px' } );

					// Trigger :dragStart event
					if (!nextDrag) {
						$handle.trigger(pluginName + ':dragStart', [hPos]);
					}

					// Trigger :drag event
					$handle.trigger( pluginName + ':drag', [ hPos ] );

					// Trigger :dragEnd event
					if (released) {
						$handle.trigger(pluginName + ':dragEnd', [hPos]);
					}

					// Throttle sync interval -> smoother animations, lower CPU load
					if( nextDrag <= time || released || path > pathMax || path < pathMin ){

						nextDrag = time + 50;

						// Synchronize slidee position
						slide( Math.round( hPos.cur / hPos.max * ( pos.max - pos.min ) ) + pos.min, released, released ? o.speed : 50 );

					}

					// Sync pagesbar
					syncPages();

				}

			});

		});

	}());

}


// jQuery plugin extension
$.fn[pluginName] = function( options, returnInstance ){

	var method = false,
		methodArgs,
		instances = [];

	// Basic attributes logic
	if( typeof options !== 'undefined' && !$.isPlainObject( options ) ){
		method = options === false ? 'destroy' : options;
		methodArgs = arguments;
		Array.prototype.shift.call( methodArgs );
	}

	// Apply requested actions on all elements
	this.each(function( i, element ){

		// Plugin call with prevention against multiple instantiations
		var plugin = $.data( element, namespace );

		if( plugin && method ){

			// Call plugin method
			if( plugin[method] ){

				plugin[method].apply( plugin, methodArgs );

			}

		} else if( !plugin && !method ){

			// Create a new plugin object if it doesn't exist yet
			plugin =  $.data( element, namespace, new Plugin( element, options ) );

		}

		// Push plugin to instances
		instances.push( plugin );

	});

	// Return chainable jQuery object, or plugin instance(s)
	return returnInstance && !method ? instances.length > 1 ? instances : instances[0] : this;

};


// Default options
$.fn[pluginName].defaults = {

	// Sly direction
	horizontal:      0,       // set to 1 to change the sly direction to horizontal

	// Navigation by items; when using this, `scrollBy` option scrolls by items, not pixels
	itemNav:         0,       // enable type of item based navigation. when itemNav is enabled, items snap to frame edges or frame center
	                          // itemNav also enables "item activation" functionality and methods associated with it
	                          //
	                          // itemNav can be:
	                          // ------------------------------------------------------------------------------------
	                          // basic:         items snap to edges (ideal if you don't care about "active item" functionality)
	                          // smart:         same as basic, but activated item close to, or outside of the visible edge will be positioned to the opposite edge
	                          // centered:      activated items are positioned to the center of visible frame if possible
	                          // forceCentered: active items are always centered & centered items are always active (scrolling & dragging end activates centered item)

	// Scrollbar
	scrollBar:       null,    // selector or DOM element for scrollbar container (scrollbar container should have one child element representing scrollbar handle)
	  dynamicHandle: 1,       // resizes scrollbar handle to represent the relation between hidden and visible content. set to "0" to leave it as big as CSS made it
	  dragHandle:    1,       // set to 0 to disable dragging of scrollbar handle with mouse
	  minHandleSize: 50,      // minimal height or width (depends on sly direction) of a handle in pixels

	// Pagesbar (when centerActive is enabled, every item is considered to be a page)
	pagesBar:        null,    // selector or DOM element for pages bar container
	  pageBuilder:            // function with `index` (starting at 0) as argument that returns an HTML for one item
	    function( index ){
	      return '<li>'+(index+1)+'</li>';
	    },

	// Navigation buttons
	prev:            null,    // selector or DOM element for "previous item" button ; doesn't work when `itemsNav` is disabled
	next:            null,    // selector or DOM element for "next item" button     ; doesn't work when `itemsNav` is disabled
	prevPage:        null,    // selector or DOM element for "previous page" button
	nextPage:        null,    // selector or DOM element for "next page" button

	// Automated cycling
	cycleBy:         0,       // enable automatic cycling by 'items', or 'pages'
	  cycleInterval: 5000,    // number of milliseconds between cycles
	  pauseOnHover:  1,       // pause cycling when mouse hovers over frame
	  startPaused:   0,       // set to "1" to start in paused sate. cycling can be than resumed with "cycle" method

	// Mixed options
	scrollBy:        0,       // how many pixels/items should one mouse scroll event go. leave "0" to disable mousewheel scrolling
	dragContent:     0,       // set to 1 to enable navigation by dragging the content with your mouse
	  elasticBounds: 0,       // when dragging past limits, stretch them a little bit (like on spartphones)
	speed:           300,     // animations speed
	easing:          'swing', // animations easing. build in jQuery options are "linear" and "swing". for more, install gsgd.co.uk/sandbox/jquery/easing/
	scrollSource:    null,    // selector or DOM element for catching the mouse wheel event for sly scrolling. default source is the frame
	dragSource:      null,    // selector or DOM element for catching the mouse dragging events. default source is the frame
	startAt:         0,       // starting offset in pixels or items (depends on itemsNav option)
	keyboardNav:     0,       // whether to allow navigation by keyboard arrows (left & right for horizontal, up & down for vertical)
	                          // NOTE! keyboard navigation will disable page scrolling with keyboard arrows in correspondent sly direction (vertical or horizontal)
	keyboardNavByPages: 0,    // whether the keyboard should navigate by pages instead of items (useful when not using `itemsNav` navigation)

	// Classes
	draggedClass:  'dragged', // class that will be added to scrollbar handle, or content when they are being dragged
	activeClass:   'active',  // class that will be added to the active item, or page
	disabledClass: 'disabled' // class that will be added to prev button when on start, or next button when on end

};

}(jQuery));