https://teatrpushkin.ru/layout/js/iscroll-probe.js

1/*! iScroll v5.1.3 ~ (c) 2008-2014 Matteo Spinelli ~ http://cubiq.org/license */
2(function (window, document, Math) {
3var rAF = window.requestAnimationFrame	||
4	window.webkitRequestAnimationFrame	||
5	window.mozRequestAnimationFrame		||
6	window.oRequestAnimationFrame		||
7	window.msRequestAnimationFrame		||
8	function (callback) { window.setTimeout(callback, 1000 / 60); };
9
10var utils = (function () {
11	var me = {};
12
13	var _elementStyle = document.createElement('div').style;
14	var _vendor = (function () {
15		var vendors = ['t', 'webkitT', 'MozT', 'msT', 'OT'],
16			transform,
17			i = 0,
18			l = vendors.length;
19
20		for ( ; i < l; i++ ) {
21			transform = vendors[i] + 'ransform';
22			if ( transform in _elementStyle ) return vendors[i].substr(0, vendors[i].length-1);
23		}
24
25		return false;
26	})();
27
28	function _prefixStyle (style) {
29		if ( _vendor === false ) return false;
30		if ( _vendor === '' ) return style;
31		return _vendor + style.charAt(0).toUpperCase() + style.substr(1);
32	}
33
34	me.getTime = Date.now || function getTime () { return new Date().getTime(); };
35
36	me.extend = function (target, obj) {
37		for ( var i in obj ) {
38			target[i] = obj[i];
39		}
40	};
41
42	me.addEvent = function (el, type, fn, capture) {
43		el.addEventListener(type, fn, !!capture);
44	};
45
46	me.removeEvent = function (el, type, fn, capture) {
47		el.removeEventListener(type, fn, !!capture);
48	};
49
50	me.prefixPointerEvent = function (pointerEvent) {
51		return window.MSPointerEvent ? 
52			'MSPointer' + pointerEvent.charAt(9).toUpperCase() + pointerEvent.substr(10):
53			pointerEvent;
54	};
55
56	me.momentum = function (current, start, time, lowerMargin, wrapperSize, deceleration) {
57		var distance = current - start,
58			speed = Math.abs(distance) / time,
59			destination,
60			duration;
61
62		deceleration = deceleration === undefined ? 0.0006 : deceleration;
63
64		destination = current + ( speed * speed ) / ( 2 * deceleration ) * ( distance < 0 ? -1 : 1 );
65		duration = speed / deceleration;
66
67		if ( destination < lowerMargin ) {
68			destination = wrapperSize ? lowerMargin - ( wrapperSize / 2.5 * ( speed / 8 ) ) : lowerMargin;
69			distance = Math.abs(destination - current);
70			duration = distance / speed;
71		} else if ( destination > 0 ) {
72			destination = wrapperSize ? wrapperSize / 2.5 * ( speed / 8 ) : 0;
73			distance = Math.abs(current) + destination;
74			duration = distance / speed;
75		}
76
77		return {
78			destination: Math.round(destination),
79			duration: duration
80		};
81	};
82
83	var _transform = _prefixStyle('transform');
84
85	me.extend(me, {
86		hasTransform: _transform !== false,
87		hasPerspective: _prefixStyle('perspective') in _elementStyle,
88		hasTouch: 'ontouchstart' in window,
89		hasPointer: window.PointerEvent || window.MSPointerEvent, // IE10 is prefixed
90		hasTransition: _prefixStyle('transition') in _elementStyle
91	});
92
93	// This should find all Android browsers lower than build 535.19 (both stock browser and webview)
94	me.isBadAndroid = /Android /.test(window.navigator.appVersion) && !(/Chrome\/\d/.test(window.navigator.appVersion));
95
96	me.extend(me.style = {}, {
97		transform: _transform,
98		transitionTimingFunction: _prefixStyle('transitionTimingFunction'),
99		transitionDuration: _prefixStyle('transitionDuration'),
100		transitionDelay: _prefixStyle('transitionDelay'),
101		transformOrigin: _prefixStyle('transformOrigin')
102	});
103
104	me.hasClass = function (e, c) {
105		var re = new RegExp("(^|\\s)" + c + "(\\s|$)");
106		return re.test(e.className);
107	};
108
109	me.addClass = function (e, c) {
110		if ( me.hasClass(e, c) ) {
111			return;
112		}
113
114		var newclass = e.className.split(' ');
115		newclass.push(c);
116		e.className = newclass.join(' ');
117	};
118
119	me.removeClass = function (e, c) {
120		if ( !me.hasClass(e, c) ) {
121			return;
122		}
123
124		var re = new RegExp("(^|\\s)" + c + "(\\s|$)", 'g');
125		e.className = e.className.replace(re, ' ');
126	};
127
128	me.offset = function (el) {
129		var left = -el.offsetLeft,
130			top = -el.offsetTop;
131
132		// jshint -W084
133		while (el = el.offsetParent) {
134			left -= el.offsetLeft;
135			top -= el.offsetTop;
136		}
137		// jshint +W084
138
139		return {
140			left: left,
141			top: top
142		};
143	};
144
145	me.preventDefaultException = function (el, exceptions) {
146		for ( var i in exceptions ) {
147			if ( exceptions[i].test(el[i]) ) {
148				return true;
149			}
150		}
151
152		return false;
153	};
154
155	me.extend(me.eventType = {}, {
156		touchstart: 1,
157		touchmove: 1,
158		touchend: 1,
159

160		mousedown: 2,
161		mousemove: 2,
162		mouseup: 2,
163
164		pointerdown: 3,
165		pointermove: 3,
166		pointerup: 3,
167
168		MSPointerDown: 3,
169		MSPointerMove: 3,
170		MSPointerUp: 3
171	});
172
173	me.extend(me.ease = {}, {
174		quadratic: {
175			style: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)',
176			fn: function (k) {
177				return k * ( 2 - k );
178			}
179		},
180		circular: {
181			style: 'cubic-bezier(0.1, 0.57, 0.1, 1)',	// Not properly "circular" but this looks better, it should be (0.075, 0.82, 0.165, 1)
182			fn: function (k) {
183				return Math.sqrt( 1 - ( --k * k ) );
184			}
185		},
186		back: {
187			style: 'cubic-bezier(0.175, 0.885, 0.32, 1.275)',
188			fn: function (k) {
189				var b = 4;
190				return ( k = k - 1 ) * k * ( ( b + 1 ) * k + b ) + 1;
191			}
192		},
193		bounce: {
194			style: '',
195			fn: function (k) {
196				if ( ( k /= 1 ) < ( 1 / 2.75 ) ) {
197					return 7.5625 * k * k;
198				} else if ( k < ( 2 / 2.75 ) ) {
199					return 7.5625 * ( k -= ( 1.5 / 2.75 ) ) * k + 0.75;
200				} else if ( k < ( 2.5 / 2.75 ) ) {
201					return 7.5625 * ( k -= ( 2.25 / 2.75 ) ) * k + 0.9375;
202				} else {
203					return 7.5625 * ( k -= ( 2.625 / 2.75 ) ) * k + 0.984375;
204				}
205			}
206		},
207		elastic: {
208			style: '',
209			fn: function (k) {
210				var f = 0.22,
211					e = 0.4;
212
213				if ( k === 0 ) { return 0; }
214				if ( k == 1 ) { return 1; }
215
216				return ( e * Math.pow( 2, - 10 * k ) * Math.sin( ( k - f / 4 ) * ( 2 * Math.PI ) / f ) + 1 );
217			}
218		}
219	});
220
221	me.tap = function (e, eventName) {
222		var ev = document.createEvent('Event');
223		ev.initEvent(eventName, true, true);
224		ev.pageX = e.pageX;
225		ev.pageY = e.pageY;
226		e.target.dispatchEvent(ev);
227	};
228
229	me.click = function (e) {
230		var target = e.target,
231			ev;
232
233		if ( !(/(SELECT|INPUT|TEXTAREA)/i).test(target.tagName) ) {
234			ev = document.createEvent('MouseEvents');
235			ev.initMouseEvent('click', true, true, e.view, 1,
236				target.screenX, target.screenY, target.clientX, target.clientY,
237				e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
238				0, null);
239
240			ev._constructed = true;
241			target.dispatchEvent(ev);
242		}
243	};
244
245	return me;
246})();
247
248function IScroll (el, options) {
249	this.wrapper = typeof el == 'string' ? document.querySelector(el) : el;
250	this.scroller = this.wrapper.children[0];
251	this.scrollerStyle = this.scroller.style;		// cache style for better performance
252
253	this.options = {
254
255		resizeScrollbars: true,
256

257		mouseWheelSpeed: 20,
258
259		snapThreshold: 0.334,
260
261// INSERT POINT: OPTIONS 
262
263		startX: 0,
264		startY: 0,
265		scrollY: true,
266		directionLockThreshold: 5,
267		momentum: true,
268
269		bounce: true,
270		bounceTime: 600,
271		bounceEasing: '',
272
273		preventDefault: true,
274		preventDefaultException: { tagName: /^(INPUT|TEXTAREA|BUTTON|SELECT)$/ },
275
276		HWCompositing: true,
277		useTransition: true,
278		useTransform: true
279	};
280
281	for ( var i in options ) {
282		this.options[i] = options[i];
283	}
284
285	// Normalize options
286	this.translateZ = this.options.HWCompositing && utils.hasPerspective ? ' translateZ(0)' : '';
287
288	this.options.useTransition = utils.hasTransition && this.options.useTransition;
289	this.options.useTransform = utils.hasTransform && this.options.useTransform;
290
291	this.options.eventPassthrough = this.options.eventPassthrough === true ? 'vertical' : this.options.eventPassthrough;
292	this.options.preventDefault = !this.options.eventPassthrough && this.options.preventDefault;
293
294	// If you want eventPassthrough I have to lock one of the axes
295	this.options.scrollY = this.options.eventPassthrough == 'vertical' ? false : this.options.scrollY;
296	this.options.scrollX = this.options.eventPassthrough == 'horizontal' ? false : this.options.scrollX;
297
298	// With eventPassthrough we also need lockDirection mechanism
299	this.options.freeScroll = this.options.freeScroll && !this.options.eventPassthrough;
300	this.options.directionLockThreshold = this.options.eventPassthrough ? 0 : this.options.directionLockThreshold;
301
302	this.options.bounceEasing = typeof this.options.bounceEasing == 'string' ? utils.ease[this.options.bounceEasing] || utils.ease.circular : this.options.bounceEasing;
303
304	this.options.resizePolling = this.options.resizePolling === undefined ? 60 : this.options.resizePolling;
305
306	if ( this.options.tap === true ) {
307		this.options.tap = 'tap';
308	}
309
310	if ( this.options.shrinkScrollbars == 'scale' ) {
311		this.options.useTransition = false;
312	}
313
314	this.options.invertWheelDirection = this.options.invertWheelDirection ? -1 : 1;
315
316	if ( this.options.probeType == 3 ) {
317		this.options.useTransition = false;	}
318
319// INSERT POINT: NORMALIZATION
320
321	// Some defaults	
322	this.x = 0;
323	this.y = 0;
324	this.directionX = 0;
325	this.directionY = 0;
326	this._events = {};
327
328// INSERT POINT: DEFAULTS
329
330	this._init();
331	this.refresh();
332
333	this.scrollTo(this.options.startX, this.options.startY);
334	this.enable();
335}
336
337IScroll.prototype = {
338	version: '5.1.3',
339
340	_init: function () {
341		this._initEvents();
342
343		if ( this.options.scrollbars || this.options.indicators ) {
344			this._initIndicators();
345		}
346
347		if ( this.options.mouseWheel ) {
348			this._initWheel();
349		}
350
351		if ( this.options.snap ) {
352			this._initSnap();
353		}
354
355		if ( this.options.keyBindings ) {
356			this._initKeys();
357		}
358
359// INSERT POINT: _init
360
361	},
362
363	destroy: function () {
364		this._initEvents(true);
365
366		this._execEvent('destroy');
367	},
368
369	_transitionEnd: function (e) {
370		if ( e.target != this.scroller || !this.isInTransition ) {
371			return;
372		}
373
374		this._transitionTime();
375		if ( !this.resetPosition(this.options.bounceTime) ) {
376			this.isInTransition = false;
377			this._execEvent('scrollEnd');
378		}
379	},
380
381	_start: function (e) {
382		// React to left mouse button only
383		if ( utils.eventType[e.type] != 1 ) {
384			if ( e.button !== 0 ) {
385				return;
386			}
387		}
388
389		if ( !this.enabled || (this.initiated && utils.eventType[e.type] !== this.initiated) ) {
390			return;
391		}
392
393		if ( this.options.preventDefault && !utils.isBadAndroid && !utils.preventDefaultException(e.target, this.options.preventDefaultException) ) {
394			e.preventDefault();
395		}
396
397		var point = e.touches ? e.touches[0] : e,
398			pos;
399
400		this.initiated	= utils.eventType[e.type];
401		this.moved		= false;
402		this.distX		= 0;
403		this.distY		= 0;
404		this.directionX = 0;
405		this.directionY = 0;
406		this.directionLocked = 0;
407
408		this._transitionTime();
409
410		this.startTime = utils.getTime();
411
412		if ( this.options.useTransition && this.isInTransition ) {
413			this.isInTransition = false;
414			pos = this.getComputedPosition();
415			this._translate(Math.round(pos.x), Math.round(pos.y));
416			this._execEvent('scrollEnd');
417		} else if ( !this.options.useTransition && this.isAnimating ) {
418			this.isAnimating = false;
419			this._execEvent('scrollEnd');
420		}
421
422		this.startX    = this.x;
423		this.startY    = this.y;
424		this.absStartX = this.x;
425		this.absStartY = this.y;
426		this.pointX    = point.pageX;
427		this.pointY    = point.pageY;
428
429		this._execEvent('beforeScrollStart');
430	},
431
432	_move: function (e) {
433		if ( !this.enabled || utils.eventType[e.type] !== this.initiated ) {
434			return;
435		}
436
437		if ( this.options.preventDefault ) {	// increases performance on Android? TODO: check!
438			e.preventDefault();
439		}
440
441		var point		= e.touches ? e.touches[0] : e,
442			deltaX		= point.pageX - this.pointX,
443			deltaY		= point.pageY - this.pointY,
444			timestamp	= utils.getTime(),
445			newX, newY,
446			absDistX, absDistY;
447
448		this.pointX		= point.pageX;
449		this.pointY		= point.pageY;
450
451		this.distX		+= deltaX;
452		this.distY		+= deltaY;
453		absDistX		= Math.abs(this.distX);
454		absDistY		= Math.abs(this.distY);
455
456		// We need to move at least 10 pixels for the scrolling to initiate
457		if ( timestamp - this.endTime > 300 && (absDistX < 10 && absDistY < 10) ) {
458			return;
459		}
460
461		// If you are scrolling in one direction lock the other
462		if ( !this.directionLocked && !this.options.freeScroll ) {
463			if ( absDistX > absDistY + this.options.directionLockThreshold ) {

464				this.directionLocked = 'h';		// lock horizontally
465			} else if ( absDistY >= absDistX + this.options.directionLockThreshold ) {
466				this.directionLocked = 'v';		// lock vertically
467			} else {
468				this.directionLocked = 'n';		// no lock
469			}
470		}
471
472		if ( this.directionLocked == 'h' ) {
473			if ( this.options.eventPassthrough == 'vertical' ) {
474				e.preventDefault();
475			} else if ( this.options.eventPassthrough == 'horizontal' ) {
476				this.initiated = false;
477				return;
478			}
479
480			deltaY = 0;
481		} else if ( this.directionLocked == 'v' ) {
482			if ( this.options.eventPassthrough == 'horizontal' ) {
483				e.preventDefault();
484			} else if ( this.options.eventPassthrough == 'vertical' ) {
485				this.initiated = false;
486				return;
487			}
488
489			deltaX = 0;
490		}
491
492		deltaX = this.hasHorizontalScroll ? deltaX : 0;
493		deltaY = this.hasVerticalScroll ? deltaY : 0;
494
495		newX = this.x + deltaX;
496		newY = this.y + deltaY;
497
498		// Slow down if outside of the boundaries
499		if ( newX > 0 || newX < this.maxScrollX ) {
500			newX = this.options.bounce ? this.x + deltaX / 3 : newX > 0 ? 0 : this.maxScrollX;
501		}
502		if ( newY > 0 || newY < this.maxScrollY ) {
503			newY = this.options.bounce ? this.y + deltaY / 3 : newY > 0 ? 0 : this.maxScrollY;
504		}
505
506		this.directionX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
507		this.directionY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;
508
509		if ( !this.moved ) {
510			this._execEvent('scrollStart');
511		}
512
513		this.moved = true;
514
515		this._translate(newX, newY);
516
517/* REPLACE START: _move */
518		if ( timestamp - this.startTime > 300 ) {
519			this.startTime = timestamp;
520			this.startX = this.x;
521			this.startY = this.y;
522
523			if ( this.options.probeType == 1 ) {
524				this._execEvent('scroll');
525			}
526		}
527
528		if ( this.options.probeType > 1 ) {
529			this._execEvent('scroll');
530		}
531/* REPLACE END: _move */
532
533	},
534
535	_end: function (e) {
536		if ( !this.enabled || utils.eventType[e.type] !== this.initiated ) {
537			return;
538		}
539
540		if ( this.options.preventDefault && !utils.preventDefaultException(e.target, this.options.preventDefaultException) ) {
541			e.preventDefault();
542		}
543
544		var point = e.changedTouches ? e.changedTouches[0] : e,
545			momentumX,
546			momentumY,
547			duration = utils.getTime() - this.startTime,
548			newX = Math.round(this.x),
549			newY = Math.round(this.y),
550			distanceX = Math.abs(newX - this.startX),
551			distanceY = Math.abs(newY - this.startY),
552			time = 0,
553			easing = '';
554
555		this.isInTransition = 0;
556		this.initiated = 0;
557		this.endTime = utils.getTime();
558
559		// reset if we are outside of the boundaries
560		if ( this.resetPosition(this.options.bounceTime) ) {
561			return;
562		}
563
564		this.scrollTo(newX, newY);	// ensures that the last position is rounded
565
566		// we scrolled less than 10 pixels
567		if ( !this.moved ) {
568			if ( this.options.tap ) {
569				utils.tap(e, this.options.tap);
570			}
571
572			if ( this.options.click ) {
573				utils.click(e);
574			}
575
576			this._execEvent('scrollCancel');
577			return;
578		}
579
580		if ( this._events.flick && duration < 200 && distanceX < 100 && distanceY < 100 ) {
581			this._execEvent('flick');
582			return;
583		}
584
585		// start momentum animation if needed
586		if ( this.options.momentum && duration < 300 ) {
587			momentumX = this.hasHorizontalScroll ? utils.momentum(this.x, this.startX, duration, this.maxScrollX, this.options.bounce ? this.wrapperWidth : 0, this.options.deceleration) : { destination: newX, duration: 0 };
588			momentumY = this.hasVerticalScroll ? utils.momentum(this.y, this.startY, duration, this.maxScrollY, this.options.bounce ? this.wrapperHeight : 0, this.options.deceleration) : { destination: newY, duration: 0 };
589			newX = momentumX.destination;
590			newY = momentumY.destination;
591			time = Math.max(momentumX.duration, momentumY.duration);
592			this.isInTransition = 1;
593		}
594
595
596		if ( this.options.snap ) {
597			var snap = this._nearestSnap(newX, newY);
598			this.currentPage = snap;
599			time = this.options.snapSpeed || Math.max(
600					Math.max(
601						Math.min(Math.abs(newX - snap.x), 1000),
602						Math.min(Math.abs(newY - snap.y), 1000)
603					), 300);
604			newX = snap.x;
605			newY = snap.y;
606
607			this.directionX = 0;
608			this.directionY = 0;
609			easing = this.options.bounceEasing;
610		}
611
612// INSERT POINT: _end
613
614		if ( newX != this.x || newY != this.y ) {
615			// change easing function when scroller goes out of the boundaries
616			if ( newX > 0 || newX < this.maxScrollX || newY > 0 || newY < this.maxScrollY ) {
617				easing = utils.ease.quadratic;
618			}
619
620			this.scrollTo(newX, newY, time, easing);
621			return;
622		}
623
624		this._execEvent('scrollEnd');
625	},
626
627	_resize: function () {
628		var that = this;
629
630		clearTimeout(this.resizeTimeout);
631
632		this.resizeTimeout = setTimeout(function () {
633			that.refresh();

634		}, this.options.resizePolling);
635	},
636
637	resetPosition: function (time) {
638		var x = this.x,
639			y = this.y;
640
641		time = time || 0;
642
643		if ( !this.hasHorizontalScroll || this.x > 0 ) {
644			x = 0;
645		} else if ( this.x < this.maxScrollX ) {
646			x = this.maxScrollX;
647		}
648
649		if ( !this.hasVerticalScroll || this.y > 0 ) {
650			y = 0;
651		} else if ( this.y < this.maxScrollY ) {
652			y = this.maxScrollY;
653		}
654
655		if ( x == this.x && y == this.y ) {
656			return false;
657		}
658
659		this.scrollTo(x, y, time, this.options.bounceEasing);
660
661		return true;
662	},
663
664	disable: function () {
665		this.enabled = false;
666	},
667
668	enable: function () {
669		this.enabled = true;
670	},
671
672	refresh: function () {
673		var rf = this.wrapper.offsetHeight;		// Force reflow
674
675		this.wrapperWidth	= this.wrapper.clientWidth;
676		this.wrapperHeight	= this.wrapper.clientHeight;
677
678/* REPLACE START: refresh */
679
680		this.scrollerWidth	= this.scroller.offsetWidth;
681		this.scrollerHeight	= this.scroller.offsetHeight;
682
683		this.maxScrollX		= this.wrapperWidth - this.scrollerWidth;
684		this.maxScrollY		= this.wrapperHeight - this.scrollerHeight;
685
686/* REPLACE END: refresh */
687
688		this.hasHorizontalScroll	= this.options.scrollX && this.maxScrollX < 0;
689		this.hasVerticalScroll		= this.options.scrollY && this.maxScrollY < 0;
690
691		if ( !this.hasHorizontalScroll ) {
692			this.maxScrollX = 0;
693			this.scrollerWidth = this.wrapperWidth;
694		}
695
696		if ( !this.hasVerticalScroll ) {
697			this.maxScrollY = 0;
698			this.scrollerHeight = this.wrapperHeight;
699		}
700
701		this.endTime = 0;
702		this.directionX = 0;
703		this.directionY = 0;
704
705		this.wrapperOffset = utils.offset(this.wrapper);
706
707		this._execEvent('refresh');
708
709		this.resetPosition();
710
711// INSERT POINT: _refresh
712
713	},
714
715	on: function (type, fn) {
716		if ( !this._events[type] ) {
717			this._events[type] = [];
718		}
719
720		this._events[type].push(fn);
721	},
722
723	off: function (type, fn) {
724		if ( !this._events[type] ) {
725			return;
726		}
727
728		var index = this._events[type].indexOf(fn);
729
730		if ( index > -1 ) {
731			this._events[type].splice(index, 1);
732		}
733	},
734
735	_execEvent: function (type) {
736		if ( !this._events[type] ) {
737			return;
738		}
739
740		var i = 0,
741			l = this._events[type].length;
742
743		if ( !l ) {
744			return;
745		}
746
747		for ( ; i < l; i++ ) {
748			this._events[type][i].apply(this, [].slice.call(arguments, 1));
749		}
750	},
751
752	scrollBy: function (x, y, time, easing) {
753		x = this.x + x;
754		y = this.y + y;
755		time = time || 0;
756
757		this.scrollTo(x, y, time, easing);
758	},
759
760	scrollTo: function (x, y, time, easing) {
761		easing = easing || utils.ease.circular;
762
763		this.isInTransition = this.options.useTransition && time > 0;
764
765		if ( !time || (this.options.useTransition && easing.style) ) {
766			this._transitionTimingFunction(easing.style);
767			this._transitionTime(time);
768			this._translate(x, y);
769		} else {
770			this._animate(x, y, time, easing.fn);
771		}
772	},
773
774	scrollToElement: function (el, time, offsetX, offsetY, easing) {
775		el = el.nodeType ? el : this.scroller.querySelector(el);
776
777		if ( !el ) {
778			return;
779		}
780
781		var pos = utils.offset(el);
782
783		pos.left -= this.wrapperOffset.left;
784		pos.top  -= this.wrapperOffset.top;
785
786		// if offsetX/Y are true we center the element to the screen
787		if ( offsetX === true ) {
788			offsetX = Math.round(el.offsetWidth / 2 - this.wrapper.offsetWidth / 2);
789		}
790		if ( offsetY === true ) {
791			offsetY = Math.round(el.offsetHeight / 2 - this.wrapper.offsetHeight / 2);
792		}
793
794		pos.left -= offsetX || 0;
795		pos.top  -= offsetY || 0;
796
797		pos.left = pos.left > 0 ? 0 : pos.left < this.maxScrollX ? this.maxScrollX : pos.left;
798		pos.top  = pos.top  > 0 ? 0 : pos.top  < this.maxScrollY ? this.maxScrollY : pos.top;
799
800		time = time === undefined || time === null || time === 'auto' ? Math.max(Math.abs(this.x-pos.left), Math.abs(this.y-pos.top)) : time;
801
802		this.scrollTo(pos.left, pos.top, time, easing);
803	},
804
805	_transitionTime: function (time) {
806		time = time || 0;
807
808		this.scrollerStyle[utils.style.transitionDuration] = time + 'ms';
809
810		if ( !time && utils.isBadAndroid ) {
811			this.scrollerStyle[utils.style.transitionDuration] = '0.001s';
812		}
813
814
815		if ( this.indicators ) {
816			for ( var i = this.indicators.length; i--; ) {
817				this.indicators[i].transitionTime(time);
818			}
819		}
820
821
822// INSERT POINT: _transitionTime
823
824	},
825
826	_transitionTimingFunction: function (easing) {
827		this.scrollerStyle[utils.style.transitionTimingFunction] = easing;
828
829
830		if ( this.indicators ) {
831			for ( var i = this.indicators.length; i--; ) {
832				this.indicators[i].transitionTimingFunction(easing);
833			}
834		}
835
836
837// INSERT POINT: _transitionTimingFunction
838
839	},
840
841	_translate: function (x, y) {
842		if ( this.options.useTransform ) {
843
844/* REPLACE START: _translate */
845
846			this.scrollerStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.translateZ;
847
848/* REPLACE END: _translate */
849
850		} else {
851			x = Math.round(x);
852			y = Math.round(y);
853			this.scrollerStyle.left = x + 'px';
854			this.scrollerStyle.top = y + 'px';
855		}
856
857		this.x = x;
858		this.y = y;
859
860
861	if ( this.indicators ) {
862		for ( var i = this.indicators.length; i--; ) {
863			this.indicators[i].updatePosition();
864		}
865	}
866
867
868// INSERT POINT: _translate
869
870	},
871
872	_initEvents: function (remove) {
873		var eventType = remove ? utils.removeEvent : utils.addEvent,
874			target = this.options.bindToWrapper ? this.wrapper : window;
875
876		eventType(window, 'orientationchange', this);
877		eventType(window, 'resize', this);
878
879		if ( this.options.click ) {
880			eventType(this.wrapper, 'click', this, true);
881		}
882
883		if ( !this.options.disableMouse ) {
884			eventType(this.wrapper, 'mousedown', this);
885			eventType(target, 'mousemove', this);
886			eventType(target, 'mousecancel', this);
887			eventType(target, 'mouseup', this);
888		}
889
890		if ( utils.hasPointer && !this.options.disablePointer ) {
891			eventType(this.wrapper, utils.prefixPointerEvent('pointerdown'), this);
892			eventType(target, utils.prefixPointerEvent('pointermove'), this);
893			eventType(target, utils.prefixPointerEvent('pointercancel'), this);
894			eventType(target, utils.prefixPointerEvent('pointerup'), this);
895		}
896
897		if ( utils.hasTouch && !this.options.disableTouch ) {
898			eventType(this.wrapper, 'touchstart', this);
899			eventType(target, 'touchmove', this);
900			eventType(target, 'touchcancel', this);
901			eventType(target, 'touchend', this);
902		}
903
904		eventType(this.scroller, 'transitionend', this);
905		eventType(this.scroller, 'webkitTransitionEnd', this);
906		eventType(this.scroller, 'oTransitionEnd', this);
907		eventType(this.scroller, 'MSTransitionEnd', this);
908	},
909
910	getComputedPosition: function () {
911		var matrix = window.getComputedStyle(this.scroller, null),
912			x, y;
913
914		if ( this.options.useTransform ) {
915			matrix = matrix[utils.style.transform].split(')')[0].split(', ');
916			x = +(matrix[12] || matrix[4]);
917			y = +(matrix[13] || matrix[5]);
918		} else {
919			x = +matrix.left.replace(/[^-\d.]/g, '');
920			y = +matrix.top.replace(/[^-\d.]/g, '');
921		}
922
923		return { x: x, y: y };
924	},
925
926	_initIndicators: function () {
927		var interactive = this.options.interactiveScrollbars,
928			customStyle = typeof this.options.scrollbars != 'string',
929			indicators = [],
930			indicator;
931
932		var that = this;
933
934		this.indicators = [];
935
936		if ( this.options.scrollbars ) {
937			// Vertical scrollbar
938			if ( this.options.scrollY ) {
939				indicator = {
940					el: createDefaultScrollbar('v', interactive, this.options.scrollbars),
941					interactive: interactive,
942					defaultScrollbars: true,
943					customStyle: customStyle,
944					resize: this.options.resizeScrollbars,
945					shrink: this.options.shrinkScrollbars,
946					fade: this.options.fadeScrollbars,
947					listenX: false
948				};
949
950				this.wrapper.appendChild(indicator.el);
951				indicators.push(indicator);
952			}
953
954			// Horizontal scrollbar
955			if ( this.options.scrollX ) {
956				indicator = {
957					el: createDefaultScrollbar('h', interactive, this.options.scrollbars),
958					interactive: interactive,
959					defaultScrollbars: true,
960					customStyle: customStyle,
961					resize: this.options.resizeScrollbars,
962					shrink: this.options.shrinkScrollbars,
963					fade: this.options.fadeScrollbars,
964					listenY: false
965				};
966
967				this.wrapper.appendChild(indicator.el);
968				indicators.push(indicator);
969			}
970		}
971
972		if ( this.options.indicators ) {
973			// TODO: check concat compatibility
974			indicators = indicators.concat(this.options.indicators);
975		}
976
977		for ( var i = indicators.length; i--; ) {
978			this.indicators.push( new Indicator(this, indicators[i]) );
979		}
980
981		// TODO: check if we can use array.map (wide compatibility and performance issues)
982		function _indicatorsMap (fn) {
983			for ( var i = that.indicators.length; i--; ) {
984				fn.call(that.indicators[i]);
985			}
986		}
987
988		if ( this.options.fadeScrollbars ) {
989			this.on('scrollEnd', function () {
990				_indicatorsMap(function () {
991					this.fade();
992				});
993			});
994
995			this.on('scrollCancel', function () {
996				_indicatorsMap(function () {
997					this.fade();
998				});
999			});
1000
1001			this.on('scrollStart', function () {
1002				_indicatorsMap(function () {
1003					this.fade(1);

1004				});
1005			});
1006
1007			this.on('beforeScrollStart', function () {
1008				_indicatorsMap(function () {
1009					this.fade(1, true);
1010				});
1011			});
1012		}
1013
1014
1015		this.on('refresh', function () {
1016			_indicatorsMap(function () {
1017				this.refresh();
1018			});
1019		});
1020
1021		this.on('destroy', function () {
1022			_indicatorsMap(function () {
1023				this.destroy();
1024			});
1025
1026			delete this.indicators;
1027		});
1028	},
1029
1030	_initWheel: function () {
1031		utils.addEvent(this.wrapper, 'wheel', this);
1032		utils.addEvent(this.wrapper, 'mousewheel', this);
1033		utils.addEvent(this.wrapper, 'DOMMouseScroll', this);
1034
1035		this.on('destroy', function () {
1036			utils.removeEvent(this.wrapper, 'wheel', this);
1037			utils.removeEvent(this.wrapper, 'mousewheel', this);
1038			utils.removeEvent(this.wrapper, 'DOMMouseScroll', this);
1039		});
1040	},
1041
1042	_wheel: function (e) {
1043		if ( !this.enabled ) {
1044			return;
1045		}
1046
1047		e.preventDefault();
1048		e.stopPropagation();
1049
1050		var wheelDeltaX, wheelDeltaY,
1051			newX, newY,
1052			that = this;
1053
1054		if ( this.wheelTimeout === undefined ) {
1055			that._execEvent('scrollStart');
1056		}
1057
1058		// Execute the scrollEnd event after 400ms the wheel stopped scrolling
1059		clearTimeout(this.wheelTimeout);
1060		this.wheelTimeout = setTimeout(function () {
1061			that._execEvent('scrollEnd');
1062			that.wheelTimeout = undefined;
1063		}, 400);
1064
1065		if ( 'deltaX' in e ) {
1066			if (e.deltaMode === 1) {
1067				wheelDeltaX = -e.deltaX * this.options.mouseWheelSpeed;
1068				wheelDeltaY = -e.deltaY * this.options.mouseWheelSpeed;
1069			} else {
1070				wheelDeltaX = -e.deltaX;
1071				wheelDeltaY = -e.deltaY;
1072			}
1073		} else if ( 'wheelDeltaX' in e ) {
1074			wheelDeltaX = e.wheelDeltaX / 120 * this.options.mouseWheelSpeed;
1075			wheelDeltaY = e.wheelDeltaY / 120 * this.options.mouseWheelSpeed;
1076		} else if ( 'wheelDelta' in e ) {
1077			wheelDeltaX = wheelDeltaY = e.wheelDelta / 120 * this.options.mouseWheelSpeed;
1078		} else if ( 'detail' in e ) {
1079			wheelDeltaX = wheelDeltaY = -e.detail / 3 * this.options.mouseWheelSpeed;
1080		} else {
1081			return;
1082		}
1083
1084		wheelDeltaX *= this.options.invertWheelDirection;
1085		wheelDeltaY *= this.options.invertWheelDirection;
1086
1087		if ( !this.hasVerticalScroll ) {
1088			wheelDeltaX = wheelDeltaY;
1089			wheelDeltaY = 0;
1090		}
1091
1092		if ( this.options.snap ) {
1093			newX = this.currentPage.pageX;
1094			newY = this.currentPage.pageY;
1095
1096			if ( wheelDeltaX > 0 ) {
1097				newX--;
1098			} else if ( wheelDeltaX < 0 ) {
1099				newX++;
1100			}
1101
1102			if ( wheelDeltaY > 0 ) {
1103				newY--;
1104			} else if ( wheelDeltaY < 0 ) {
1105				newY++;
1106			}
1107
1108			this.goToPage(newX, newY);
1109
1110			return;
1111		}
1112
1113		newX = this.x + Math.round(this.hasHorizontalScroll ? wheelDeltaX : 0);
1114		newY = this.y + Math.round(this.hasVerticalScroll ? wheelDeltaY : 0);
1115
1116		if ( newX > 0 ) {
1117			newX = 0;
1118		} else if ( newX < this.maxScrollX ) {
1119			newX = this.maxScrollX;
1120		}
1121
1122		if ( newY > 0 ) {
1123			newY = 0;
1124		} else if ( newY < this.maxScrollY ) {
1125			newY = this.maxScrollY;
1126		}
1127
1128		this.scrollTo(newX, newY, 0);
1129
1130		if ( this.options.probeType > 1 ) {
1131			this._execEvent('scroll');
1132		}
1133
1134// INSERT POINT: _wheel
1135	},
1136
1137	_initSnap: function () {
1138		this.currentPage = {};
1139
1140		if ( typeof this.options.snap == 'string' ) {
1141			this.options.snap = this.scroller.querySelectorAll(this.options.snap);
1142		}
1143
1144		this.on('refresh', function () {
1145			var i = 0, l,
1146				m = 0, n,
1147				cx, cy,
1148				x = 0, y,
1149				stepX = this.options.snapStepX || this.wrapperWidth,
1150				stepY = this.options.snapStepY || this.wrapperHeight,
1151				el;
1152
1153			this.pages = [];
1154
1155			if ( !this.wrapperWidth || !this.wrapperHeight || !this.scrollerWidth || !this.scrollerHeight ) {
1156				return;
1157			}
1158
1159			if ( this.options.snap === true ) {
1160				cx = Math.round( stepX / 2 );
1161				cy = Math.round( stepY / 2 );
1162
1163				while ( x > -this.scrollerWidth ) {
1164					this.pages[i] = [];
1165					l = 0;
1166					y = 0;
1167
1168					while ( y > -this.scrollerHeight ) {
1169						this.pages[i][l] = {
1170							x: Math.max(x, this.maxScrollX),
1171							y: Math.max(y, this.maxScrollY),
1172							width: stepX,
1173							height: stepY,
1174							cx: x - cx,
1175							cy: y - cy
1176						};
1177
1178						y -= stepY;
1179						l++;
1180					}
1181
1182					x -= stepX;
1183					i++;
1184				}
1185			} else {
1186				el = this.options.snap;
1187				l = el.length;
1188				n = -1;
1189
1190				for ( ; i < l; i++ ) {
1191					if ( i === 0 || el[i].offsetLeft <= el[i-1].offsetLeft ) {
1192						m = 0;
1193						n++;
1194					}
1195
1196					if ( !this.pages[m] ) {
1197						this.pages[m] = [];
1198					}
1199
1200					x = Math.max(-el[i].offsetLeft, this.maxScrollX);
1201					y = Math.max(-el[i].offsetTop, this.maxScrollY);
1202					cx = x - Math.round(el[i].offsetWidth / 2);
1203					cy = y - Math.round(el[i].offsetHeight / 2);
1204
1205					this.pages[m][n] = {
1206						x: x,
1207						y: y,
1208						width: el[i].offsetWidth,
1209						height: el[i].offsetHeight,
1210						cx: cx,
1211						cy: cy
1212					};
1213
1214					if ( x > this.maxScrollX ) {
1215						m++;
1216					}
1217				}
1218			}
1219
1220			this.goToPage(this.currentPage.pageX || 0, this.currentPage.pageY || 0, 0);
1221
1222			// Update snap threshold if needed
1223			if ( this.options.snapThreshold % 1 === 0 ) {
1224				this.snapThresholdX = this.options.snapThreshold;
1225				this.snapThresholdY = this.options.snapThreshold;
1226			} else {
1227				this.snapThresholdX = Math.round(this.pages[this.currentPage.pageX][this.currentPage.pageY].width * this.options.snapThreshold);
1228				this.snapThresholdY = Math.round(this.pages[this.currentPage.pageX][this.currentPage.pageY].height * this.options.snapThreshold);
1229			}
1230		});
1231
1232		this.on('flick', function () {
1233			var time = this.options.snapSpeed || Math.max(
1234					Math.max(
1235						Math.min(Math.abs(this.x - this.startX), 1000),
1236						Math.min(Math.abs(this.y - this.startY), 1000)
1237					), 300);
1238
1239			this.goToPage(
1240				this.currentPage.pageX + this.directionX,
1241				this.currentPage.pageY + this.directionY,
1242				time
1243			);
1244		});
1245	},
1246
1247	_nearestSnap: function (x, y) {
1248		if ( !this.pages.length ) {
1249			return { x: 0, y: 0, pageX: 0, pageY: 0 };
1250		}
1251
1252		var i = 0,
1253			l = this.pages.length,
1254			m = 0;
1255
1256		// Check if we exceeded the snap threshold
1257		if ( Math.abs(x - this.absStartX) < this.snapThresholdX &&
1258			Math.abs(y - this.absStartY) < this.snapThresholdY ) {
1259			return this.currentPage;
1260		}
1261
1262		if ( x > 0 ) {
1263			x = 0;
1264		} else if ( x < this.maxScrollX ) {
1265			x = this.maxScrollX;
1266		}
1267
1268		if ( y > 0 ) {
1269			y = 0;
1270		} else if ( y < this.maxScrollY ) {
1271			y = this.maxScrollY;
1272		}
1273
1274		for ( ; i < l; i++ ) {
1275			if ( x >= this.pages[i][0].cx ) {
1276				x = this.pages[i][0].x;
1277				break;
1278			}
1279		}
1280
1281		l = this.pages[i].length;
1282
1283		for ( ; m < l; m++ ) {
1284			if ( y >= this.pages[0][m].cy ) {
1285				y = this.pages[0][m].y;
1286				break;
1287			}
1288		}
1289
1290		if ( i == this.currentPage.pageX ) {
1291			i += this.directionX;
1292
1293			if ( i < 0 ) {
1294				i = 0;
1295			} else if ( i >= this.pages.length ) {
1296				i = this.pages.length - 1;
1297			}
1298
1299			x = this.pages[i][0].x;
1300		}
1301
1302		if ( m == this.currentPage.pageY ) {
1303			m += this.directionY;
1304
1305			if ( m < 0 ) {
1306				m = 0;
1307			} else if ( m >= this.pages[0].length ) {
1308				m = this.pages[0].length - 1;
1309			}
1310
1311			y = this.pages[0][m].y;
1312		}
1313
1314		return {
1315			x: x,
1316			y: y,
1317			pageX: i,
1318			pageY: m
1319		};
1320	},
1321
1322	goToPage: function (x, y, time, easing) {
1323		easing = easing || this.options.bounceEasing;
1324
1325		if ( x >= this.pages.length ) {
1326			x = this.pages.length - 1;
1327		} else if ( x < 0 ) {
1328			x = 0;
1329		}
1330
1331		if ( y >= this.pages[x].length ) {
1332			y = this.pages[x].length - 1;
1333		} else if ( y < 0 ) {
1334			y = 0;
1335		}
1336
1337		var posX = this.pages[x][y].x,
1338			posY = this.pages[x][y].y;
1339
1340		time = time === undefined ? this.options.snapSpeed || Math.max(
1341			Math.max(
1342				Math.min(Math.abs(posX - this.x), 1000),
1343				Math.min(Math.abs(posY - this.y), 1000)
1344			), 300) : time;
1345
1346		this.currentPage = {
1347			x: posX,
1348			y: posY,
1349			pageX: x,
1350			pageY: y
1351		};
1352
1353		this.scrollTo(posX, posY, time, easing);
1354	},
1355
1356	next: function (time, easing) {
1357		var x = this.currentPage.pageX,
1358			y = this.currentPage.pageY;
1359
1360		x++;
1361
1362		if ( x >= this.pages.length && this.hasVerticalScroll ) {
1363			x = 0;
1364			y++;
1365		}
1366
1367		this.goToPage(x, y, time, easing);
1368	},
1369
1370	prev: function (time, easing) {
1371		var x = this.currentPage.pageX,
1372			y = this.currentPage.pageY;
1373
1374		x--;
1375
1376		if ( x < 0 && this.hasVerticalScroll ) {
1377			x = 0;
1378			y--;
1379		}
1380
1381		this.goToPage(x, y, time, easing);
1382	},
1383
1384	_initKeys: function (e) {
1385		// default key bindings
1386		var keys = {
1387			pageUp: 33,
1388			pageDown: 34,
1389			end: 35,
1390			home: 36,
1391			left: 37,
1392			up: 38,
1393			right: 39,
1394			down: 40
1395		};
1396		var i;
1397
1398		// if you give me characters I give you keycode
1399		if ( typeof this.options.keyBindings == 'object' ) {
1400			for ( i in this.options.keyBindings ) {
1401				if ( typeof this.options.keyBindings[i] == 'string' ) {
1402					this.options.keyBindings[i] = this.options.keyBindings[i].toUpperCase().charCo

1402deAt(0);
1403				}
1404			}
1405		} else {
1406			this.options.keyBindings = {};
1407		}
1408
1409		for ( i in keys ) {
1410			this.options.keyBindings[i] = this.options.keyBindings[i] || keys[i];
1411		}
1412
1413		utils.addEvent(window, 'keydown', this);
1414
1415		this.on('destroy', function () {
1416			utils.removeEvent(window, 'keydown', this);
1417		});
1418	},
1419
1420	_key: function (e) {
1421		if ( !this.enabled ) {
1422			return;
1423		}
1424
1425		var snap = this.options.snap,	// we are using this alot, better to cache it
1426			newX = snap ? this.currentPage.pageX : this.x,
1427			newY = snap ? this.currentPage.pageY : this.y,
1428			now = utils.getTime(),
1429			prevTime = this.keyTime || 0,
1430			acceleration = 0.250,
1431			pos;
1432
1433		if ( this.options.useTransition && this.isInTransition ) {
1434			pos = this.getComputedPosition();
1435
1436			this._translate(Math.round(pos.x), Math.round(pos.y));
1437			this.isInTransition = false;
1438		}
1439
1440		this.keyAcceleration = now - prevTime < 200 ? Math.min(this.keyAcceleration + acceleration, 50) : 0;
1441
1442		switch ( e.keyCode ) {
1443			case this.options.keyBindings.pageUp:
1444				if ( this.hasHorizontalScroll && !this.hasVerticalScroll ) {
1445					newX += snap ? 1 : this.wrapperWidth;
1446				} else {
1447					newY += snap ? 1 : this.wrapperHeight;
1448				}
1449				break;
1450			case this.options.keyBindings.pageDown:
1451				if ( this.hasHorizontalScroll && !this.hasVerticalScroll ) {
1452					newX -= snap ? 1 : this.wrapperWidth;
1453				} else {
1454					newY -= snap ? 1 : this.wrapperHeight;
1455				}
1456				break;
1457			case this.options.keyBindings.end:
1458				newX = snap ? this.pages.length-1 : this.maxScrollX;
1459				newY = snap ? this.pages[0].length-1 : this.maxScrollY;
1460				break;
1461			case this.options.keyBindings.home:
1462				newX = 0;
1463				newY = 0;
1464				break;
1465			case this.options.keyBindings.left:
1466				newX += snap ? -1 : 5 + this.keyAcceleration>>0;
1467				break;
1468			case this.options.keyBindings.up:
1469				newY += snap ? 1 : 5 + this.keyAcceleration>>0;
1470				break;
1471			case this.options.keyBindings.right:
1472				newX -= snap ? -1 : 5 + this.keyAcceleration>>0;
1473				break;
1474			case this.options.keyBindings.down:
1475				newY -= snap ? 1 : 5 + this.keyAcceleration>>0;
1476				break;
1477			default:
1478				return;
1479		}
1480
1481		if ( snap ) {
1482			this.goToPage(newX, newY);
1483			return;
1484		}
1485
1486		if ( newX > 0 ) {
1487			newX = 0;
1488			this.keyAcceleration = 0;
1489		} else if ( newX < this.maxScrollX ) {
1490			newX = this.maxScrollX;
1491			this.keyAcceleration = 0;
1492		}
1493
1494		if ( newY > 0 ) {
1495			newY = 0;
1496			this.keyAcceleration = 0;
1497		} else if ( newY < this.maxScrollY ) {
1498			newY = this.maxScrollY;
1499			this.keyAcceleration = 0;
1500		}
1501
1502		this.scrollTo(newX, newY, 0);
1503
1504		this.keyTime = now;
1505	},
1506
1507	_animate: function (destX, destY, duration, easingFn) {
1508		var that = this,
1509			startX = this.x,
1510			startY = this.y,
1511			startTime = utils.getTime(),
1512			destTime = startTime + duration;
1513
1514		function step () {
1515			var now = utils.getTime(),
1516				newX, newY,
1517				easing;
1518
1519			if ( now >= destTime ) {
1520				that.isAnimating = false;
1521				that._translate(destX, destY);
1522				
1523				if ( !that.resetPosition(that.options.bounceTime) ) {
1524					that._execEvent('scrollEnd');
1525				}
1526
1527				return;
1528			}
1529
1530			now = ( now - startTime ) / duration;
1531			easing = easingFn(now);
1532			newX = ( destX - startX ) * easing + startX;
1533			newY = ( destY - startY ) * easing + startY;
1534			that._translate(newX, newY);
1535
1536			if ( that.isAnimating ) {
1537				rAF(step);
1538			}
1539
1540			if ( that.options.probeType == 3 ) {
1541				that._execEvent('scroll');
1542			}
1543		}
1544
1545		this.isAnimating = true;
1546		step();
1547	},
1548
1549	handleEvent: function (e) {
1550		switch ( e.type ) {
1551			case 'touchstart':
1552			case 'pointerdown':
1553			case 'MSPointerDown':
1554			case 'mousedown':
1555				this._start(e);
1556				break;
1557			case 'touchmove':
1558			case 'pointermove':
1559			case 'MSPointerMove':
1560			case 'mousemove':
1561				this._move(e);
1562				break;
1563			case 'touchend':
1564			case 'pointerup':
1565			case 'MSPointerUp':
1566			case 'mouseup':
1567			case 'touchcancel':
1568			case 'pointercancel':
1569			case 'MSPointerCancel':
1570			case 'mousecancel':
1571				this._end(e);
1572				break;
1573			case 'orientationchange':
1574			case 'resize':
1575				this._resize();
1576				break;
1577			case 'transitionend':
1578			case 'webkitTransitionEnd':
1579			case 'oTransitionEnd':
1580			case 'MSTransitionEnd':
1581				this._transitionEnd(e);
1582				break;
1583			case 'wheel':
1584			case 'DOMMouseScroll':
1585			case 'mousewheel':
1586				this._wheel(e);
1587				break;
1588			case 'keydown':
1589				this._key(e);
1590				break;
1591			case 'click':
1592				if ( !e._constructed ) {
1593					e.preventDefault();
1594					e.stopPropagation();
1595				}
1596				break;
1597		}
1598	}
1599};
1600function createDefaultScrollbar (direction, interactive, type) {
1601	var scrollbar = document.createElement('div'),
1602		indicator = document.createElement('div');
1603
1604	if ( type === true ) {
1605		scrollbar.style.cssText = 'position:absolute;z-index:9999';
1606		indicator.style.cssText = '-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;position:absolute;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);border-radius:3px';
1607	}
1608
1609	indicator.className = 'iScrollIndicator';
1610
1611	if ( direction == 'h' ) {
1612		if ( type === true ) {
1613			scrollbar.style.cssText += ';height:7px;left:2px;right:2px;bottom:0';
1614			indicator.style.height = '100%';
1615		}
1616		scrollbar.className = 'iScrollHorizontalScrollbar';
1617	} else {
1618		if ( type === true ) {
1619			scrollbar.style.cssText += ';width:7px;bottom:2px;top:2px;right:1px';
1620			indicator.style.width = '100%';
1621		}
1622		scrollbar.className = 'iScrollVerticalScrollbar';
1623	}
1624
1625	scrollbar.style.cssText += ';overflow:hidden';
1626
1627	if ( !interactive ) {
1628		scrollbar.style.pointerEvents = 'none';
1629	}
1630
1631	scrollbar.appendChild(indicator);
1632
1633	return scrollbar;
1634}
1635
1636function Indicator (scroller, options) {
1637	this.wrapper = typeof options.el == 'string' ? document.querySelector(options.el) : options.el;
1638	this.wrapperStyle = this.wrapper.style;
1639	this.indicator = this.wrapper.children[0];
1640	this.indicatorStyle = this.indicator.style;
1641	this.scroller = scroller;
1642
1643	this.options = {
1644		listenX: true,
1645		listenY: true,
1646		interactive: false,
1647		resize: true,
1648		defaultScrollbars: false,
1649		shrink: false,
1650		fade: false,
1651		speedRatioX: 0,
1652		speedRatioY: 0
1653	};
1654
1655	for ( var i in options ) {
1656		this.options[i] = options[i];
1657	}
1658
1659	this.sizeRatioX = 1;
1660	this.sizeRatioY = 1;
1661	this.maxPosX = 0;
1662	this.maxPosY = 0;
1663
1664	if ( this.options.interactive ) {
1665		if ( !this.options.disableTouch ) {
1666			utils.addEvent(this.indicator, 'touchstart', this);
1667			utils.addEvent(window, 'touchend', this);
1668		}
1669		if ( !this.options.disablePointer ) {
1670			utils.addEvent(this.indicator, utils.prefixPointerEvent('pointerdown'), this);
1671			utils.addEvent(window, utils.prefixPointerEvent('pointerup'), this);
1672		}
1673		if ( !this.options.disableMouse ) {
1674			utils.addEvent(this.indicator, 'mousedown', this);
1675			utils.addEvent(window, 'mouseup', this);
1676		}
1677	}
1678
1679	if ( this.options.fade ) {
1680		this.wrapperStyle[utils.style.transform] = this.scroller.translateZ;
1681		this.wrapperStyle[utils.style.transitionDuration] = utils.isBadAndroid ? '0.001s' : '0ms';
1682		this.wrapperStyle.opacity = '0';
1683	}
1684}
1685
1686Indicator.prototype = {
1687	handleEvent: function (e) {
1688		switch ( e.type ) {
1689			case 'touchstart':
1690			case 'pointerdown':
1691			case 'MSPointerDown':
1692			case 'mousedown':
1693				this._start(e);
1694				break;
1695			case 'touchmove':
1696			case 'pointermove':
1697			case 'MSPointerMove':
1698			case 'mousemove':
1699				this._move(e);
1700				break;
1701			case 'touchend':
1702			case 'pointerup':
1703			case 'MSPointerUp':
1704			case 'mouseup':
1705			case 'touchcancel':
1706			case 'pointercancel':
1707			case 'MSPointerCancel':
1708			case 'mousecancel':
1709				this._end(e);
1710				break;
1711		}
1712	},
1713
1714	destroy: function () {
1715		if ( this.options.interactive ) {
1716			utils.removeEvent(this.indicator, 'touchstart', this);
1717			utils.removeEvent(this.indicator, utils.prefixPointerEvent('pointerdown'), this);
1718			utils.removeEvent(this.indicator, 'mousedown', this);
1719
1720			utils.removeEvent(window, 'touchmove', this);
1721			utils.removeEvent(window, utils.prefixPointerEvent('pointermove'), this);
1722			utils.removeEvent(window, 'mousemove', this);
1723
1724			utils.removeEvent(window, 'touchend', this);
1725			utils.removeEvent(window, utils.prefixPointerEvent('pointerup'), this);
1726			utils.removeEvent(window, 'mouseup', this);
1727		}
1728
1729		if ( this.options.defaultScrollbars ) {
1730			this.wrapper.parentNode.removeChild(this.wrapper);
1731		}
1732	},
1733
1734	_start: function (e) {
1735		var point = e.touches ? e.touches[0] : e;
1736
1737		e.preventDefault();
1738		e.stopPropagation();
1739
1740		this.transitionTime();
1741
1742		this.initiated = true;
1743		this.moved = false;
1744		this.lastPointX	= point.pageX;
1745		this.lastPointY	= point.pageY;
1746
1747		this.startTime	= utils.getTime();
1748
1749		if ( !this.options.disableTouch ) {
1750			utils.addEvent(window, 'touchmove', this);
1751		}
1752		if ( !this.options.disablePointer ) {
1753			utils.addEvent(window, utils.prefixPointerEvent('pointermove'), this);
1754		}
1755		if ( !this.options.disableMouse ) {
1756			utils.addEvent(window, 'mousemove', this);
1757		}
1758
1759		this.scroller._execEvent('beforeScrollStart');
1760	},
1761
1762	_move: function (e) {
1763		var point = e.touches ? e.touches[0] : e,
1764			deltaX, deltaY,
1765			newX, newY,
1766			timestamp = utils.getTime();
1767
1768		if ( !this.moved ) {
1769			this.scroller._execEvent('scrollStart');
1770		}
1771
1772		this.moved = true;
1773
1774		deltaX = point.pageX - this.lastPointX;
1775		this.lastPointX = point.pageX;
1776
1777		deltaY = point.pageY - this.lastPointY;
1778		this.lastPointY = point.pageY;
1779
1780		newX = this.x + deltaX;
1781		newY = this.y + deltaY;
1782
1783		this._pos(newX, newY);
1784
1785
1786		if ( this.scroller.options.probeType == 1 && timestamp - this.startTime > 300 ) {
1787			this.startTime = timestamp;
1788			this.scroller._execEvent('scroll');
1789		} else if ( this.scroller.options.probeType > 1 ) {
1790			this.scroller._execEvent('scroll');
1791		}
1792
1793
1794// INSERT POINT: indicator._move
1795
1796		e.preventDefault();
1797		e.stopPropagation();
1798	},
1799
1800	_end: function (e) {
1801		if ( !this.initiated ) {
1802			return;
1803		}
1804
1805		this.initiated = false;
1806
1807		e.preventDefault();
1808		e.stopPropagation();
1809
1810		utils.removeEvent(window, 'touchmove', this);
1811		utils.removeEvent(window, utils.prefixPointerEvent('pointermove'), this);
1812		utils.removeEvent(window, 'mousemove', this);
1813
1814		if ( this.scroller.options.snap ) {
1815			var snap = this.scroller._nearestSnap(this.scroller.x, this.scroller.y);
1816
1817			var time = this.options.snapSpeed || Math.max(
1818					Math.max(
1819						Math.min(Math.abs(this.scroller.x - snap.x), 1000),
1820						Math.min(Math.abs(this.scroller.y - snap.y), 1000)
1821					), 300);
1822
1823			if ( this.scroller.x != snap.x || this.scroller.y != snap.y ) {
1824				this.scroller.directionX = 0;
1825				this.scroller.directionY = 0;
1826				this.scroller.currentPage = snap;
1827				this.scroller.scrollTo(snap.x, snap.y, time, this.scroller.options.bounceEasing);
1828			}
1829		}
1830
1831		if ( this.moved ) {
1832			this.scroller._execEvent('scrollEnd');
1833		}
1834	},
1835
1836	transitionTime: function (time) {
1837		time = time || 0;
1838		this.indicatorStyle[utils.style.transitionDuration] = time + 'ms';
1839
1840		if ( !time && utils.isBadAndroid ) {
1841			this.indicatorStyle[utils.style.transitionDuration] = '0.001s';
1842		}
1843	},
1844
1845	transitionTimingFunction: function (easing) {
1846		this.indicatorStyle[utils.style.transitionTimingFunction] = easing;
1847	},
1848
1849	refresh: function () {
1850		this.transitionTime();
1851
1852		if ( this.options.listenX && !this.options.listenY ) {
1853			this.indicatorStyle.display = this.scroller.hasHorizontalScroll ? 'block' : 'none';
1854		} else if ( this.options.listenY && !this.options.listenX ) {
1855			this.indicatorStyle.display = this.scroller.hasVerticalScroll ? 'block' : 'none';
1856		} else {
1857			this.indicatorStyle.display = this.scroller.hasHorizontalScroll || this.scroller.hasVerticalScroll ? 'block' : 'none';
1858		}
1859
1860		if ( this.scroller.hasHorizontalScroll && this.scroller.hasVerticalScroll ) {
1861			utils.addClass(this.wrapper, 'iScrollBothScrollbars');
1862			utils.removeClass(this.wrapper, 'iScrollLoneScrollbar');
1863
1864			if ( this.options.defaultScrollbars && this.options.customStyle ) {
1865				if ( this.options.listenX ) {
1866					this.wrapper.style.right = '8px';
1867				} else {
1868					this.wrapper.style.bottom = '8px';
1869				}
1870			}
1871		} else {
1872			utils.removeClass(this.wrapper, 'iScrollBothScrollbars');
1873			utils.addClass(this.wrapper, 'iScrollLoneScrollbar');
1874
1875			if ( this.options.defaultScrollbars && this.options.customStyle ) {
1876				if ( this.options.listenX ) {
1877					this.wrapper.style.right = '2px';
1878				} else {
1879					this.wrapper.style.bottom = '2px';
1880				}
1881			}
1882		}
1883
1884		var r = this.wrapper.offsetHeight;	// force refresh
1885
1886		if ( this.options.listenX ) {

1887			this.wrapperWidth = this.wrapper.clientWidth;
1888			if ( this.options.resize ) {
1889				this.indicatorWidth = Math.max(Math.round(this.wrapperWidth * this.wrapperWidth / (this.scroller.scrollerWidth || this.wrapperWidth || 1)), 8);
1890				this.indicatorStyle.width = this.indicatorWidth + 'px';
1891			} else {
1892				this.indicatorWidth = this.indicator.clientWidth;
1893			}
1894
1895			this.maxPosX = this.wrapperWidth - this.indicatorWidth;
1896
1897			if ( this.options.shrink == 'clip' ) {
1898				this.minBoundaryX = -this.indicatorWidth + 8;
1899				this.maxBoundaryX = this.wrapperWidth - 8;
1900			} else {
1901				this.minBoundaryX = 0;
1902				this.maxBoundaryX = this.maxPosX;
1903			}
1904
1905			this.sizeRatioX = this.options.speedRatioX || (this.scroller.maxScrollX && (this.maxPosX / this.scroller.maxScrollX));	
1906		}
1907
1908		if ( this.options.listenY ) {
1909			this.wrapperHeight = this.wrapper.clientHeight;
1910			if ( this.options.resize ) {
1911				this.indicatorHeight = Math.max(Math.round(this.wrapperHeight * this.wrapperHeight / (this.scroller.scrollerHeight || this.wrapperHeight || 1)), 8);
1912				this.indicatorStyle.height = this.indicatorHeight + 'px';
1913			} else {
1914				this.indicatorHeight = this.indicator.clientHeight;
1915			}
1916
1917			this.maxPosY = this.wrapperHeight - this.indicatorHeight;
1918
1919			if ( this.options.shrink == 'clip' ) {
1920				this.minBoundaryY = -this.indicatorHeight + 8;
1921				this.maxBoundaryY = this.wrapperHeight - 8;
1922			} else {
1923				this.minBoundaryY = 0;
1924				this.maxBoundaryY = this.maxPosY;
1925			}
1926
1927			this.maxPosY = this.wrapperHeight - this.indicatorHeight;
1928			this.sizeRatioY = this.options.speedRatioY || (this.scroller.maxScrollY && (this.maxPosY / this.scroller.maxScrollY));
1929		}
1930
1931		this.updatePosition();
1932	},
1933
1934	updatePosition: function () {
1935		var x = this.options.listenX && Math.round(this.sizeRatioX * this.scroller.x) || 0,
1936			y = this.options.listenY && Math.round(this.sizeRatioY * this.scroller.y) || 0;
1937
1938		if ( !this.options.ignoreBoundaries ) {
1939			if ( x < this.minBoundaryX ) {
1940				if ( this.options.shrink == 'scale' ) {
1941					this.width = Math.max(this.indicatorWidth + x, 8);
1942					this.indicatorStyle.width = this.width + 'px';
1943				}
1944				x = this.minBoundaryX;
1945			} else if ( x > this.maxBoundaryX ) {
1946				if ( this.options.shrink == 'scale' ) {
1947					this.width = Math.max(this.indicatorWidth - (x - this.maxPosX), 8);
1948					this.indicatorStyle.width = this.width + 'px';
1949					x = this.maxPosX + this.indicatorWidth - this.width;
1950				} else {
1951					x = this.maxBoundaryX;
1952				}
1953			} else if ( this.options.shrink == 'scale' && this.width != this.indicatorWidth ) {
1954				this.width = this.indicatorWidth;
1955				this.indicatorStyle.width = this.width + 'px';
1956			}
1957
1958			if ( y < this.minBoundaryY ) {
1959				if ( this.options.shrink == 'scale' ) {
1960					this.height = Math.max(this.indicatorHeight + y * 3, 8);
1961					this.indicatorStyle.height = this.height + 'px';
1962				}
1963				y = this.minBoundaryY;
1964			} else if ( y > this.maxBoundaryY ) {
1965				if ( this.options.shrink == 'scale' ) {
1966					this.height = Math.max(this.indicatorHeight - (y - this.maxPosY) * 3, 8);
1967					this.indicatorStyle.height = this.height + 'px';
1968					y = this.maxPosY + this.indicatorHeight - this.height;
1969				} else {
1970					y = this.maxBoundaryY;
1971				}
1972			} else if ( this.options.shrink == 'scale' && this.height != this.indicatorHeight ) {
1973				this.height = this.indicatorHeight;
1974				this.indicatorStyle.height = this.height + 'px';
1975			}
1976		}
1977
1978		this.x = x;
1979		this.y = y;
1980
1981		if ( this.scroller.options.useTransform ) {
1982			this.indicatorStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.scroller.translateZ;
1983		} else {
1984			this.indicatorStyle.left = x + 'px';
1985			this.indicatorStyle.top = y + 'px';
1986		}
1987	},
1988
1989	_pos: function (x, y) {
1990		if ( x < 0 ) {
1991			x = 0;
1992		} else if ( x > this.maxPosX ) {
1993			x = this.maxPosX;
1994		}
1995
1996		if ( y < 0 ) {
1997			y = 0;
1998		} else if ( y > this.maxPosY ) {
1999			y = this.maxPosY;
2000		}
2001
2002		x = this.options.listenX ? Math.round(x / this.sizeRatioX) : this.scroller.x;
2003		y = this.options.listenY ? Math.round(y / this.sizeRatioY) : this.scroller.y;
2004
2005		this.scroller.scrollTo(x, y);
2006	},
2007
2008	fade: function (val, hold) {
2009		if ( hold && !this.visible ) {
2010			return;
2011		}
2012
2013		clearTimeout(this.fadeTimeout);
2014		this.fadeTimeout = null;
2015
2016		var time = val ? 250 : 500,

2017			delay = val ? 0 : 300;
2018
2019		val = val ? '1' : '0';
2020
2021		this.wrapperStyle[utils.style.transitionDuration] = time + 'ms';
2022
2023		this.fadeTimeout = setTimeout((function (val) {
2024			this.wrapperStyle.opacity = val;
2025			this.visible = +val;
2026		}).bind(this, val), delay);
2027	}
2028};
2029
2030IScroll.utils = utils;
2031
2032if ( typeof module != 'undefined' && module.exports ) {
2033	module.exports = IScroll;
2034} else {
2035	window.IScroll = IScroll;
2036}
2037
2038})(window, document, Math);