[KiwiIRC.git] / client / js / iscroll.js

/*!\r
 * iScroll v4.1.4 ~ Copyright (c) 2011 Matteo Spinelli, http://cubiq.org\r
 * Released under MIT license, http://cubiq.org/license\r
 */\r
\r
(function(){\r
var m = Math,\r
	vendor = (/webkit/i).test(navigator.appVersion) ? 'webkit' :\r
		(/firefox/i).test(navigator.userAgent) ? 'Moz' :\r
		'opera' in window ? 'O' : '',\r
\r
	// Browser capabilities\r
	has3d = 'WebKitCSSMatrix' in window && 'm11' in new WebKitCSSMatrix(),\r
	hasTouch = 'ontouchstart' in window,\r
	hasTransform = vendor + 'Transform' in document.documentElement.style,\r
	isAndroid = (/android/gi).test(navigator.appVersion),\r
	isIDevice = (/iphone|ipad/gi).test(navigator.appVersion),\r
	isPlaybook = (/playbook/gi).test(navigator.appVersion),\r
	hasTransitionEnd = (isIDevice || isPlaybook) && 'onwebkittransitionend' in window,\r
	nextFrame = (function() {\r
	    return window.requestAnimationFrame\r
			|| window.webkitRequestAnimationFrame\r
			|| window.mozRequestAnimationFrame\r
			|| window.oRequestAnimationFrame\r
			|| window.msRequestAnimationFrame\r
			|| function(callback) { return setTimeout(callback, 17); }\r
	})(),\r
	cancelFrame = (function () {\r
	    return window.cancelRequestAnimationFrame\r
			|| window.webkitCancelRequestAnimationFrame\r
			|| window.mozCancelRequestAnimationFrame\r
			|| window.oCancelRequestAnimationFrame\r
			|| window.msCancelRequestAnimationFrame\r
			|| clearTimeout\r
	})(),\r
\r
	// Events\r
	RESIZE_EV = 'onorientationchange' in window ? 'orientationchange' : 'resize',\r
	START_EV = hasTouch ? 'touchstart' : 'mousedown',\r
	MOVE_EV = hasTouch ? 'touchmove' : 'mousemove',\r
	END_EV = hasTouch ? 'touchend' : 'mouseup',\r
	CANCEL_EV = hasTouch ? 'touchcancel' : 'mouseup',\r
	WHEEL_EV = vendor == 'Moz' ? 'DOMMouseScroll' : 'mousewheel',\r
\r
	// Helpers\r
	trnOpen = 'translate' + (has3d ? '3d(' : '('),\r
	trnClose = has3d ? ',0)' : ')',\r
\r
	// Constructor\r
	iScroll = function (el, options) {\r
		var that = this,\r
			doc = document,\r
			i;\r
\r
		that.wrapper = typeof el == 'object' ? el : doc.getElementById(el);\r
		that.wrapper.style.overflow = 'hidden';\r
		that.scroller = that.wrapper.children[0];\r
\r
		// Default options\r
		that.options = {\r
			hScroll: true,\r
			vScroll: true,\r
			bounce: true,\r
			bounceLock: false,\r
			momentum: true,\r
			lockDirection: true,\r
			useTransform: true,\r
			useTransition: false,\r
\r
			// Scrollbar\r
			hScrollbar: true,\r
			vScrollbar: true,\r
			fixedScrollbar: isAndroid,\r
			hideScrollbar: isIDevice,\r
			fadeScrollbar: isIDevice && has3d,\r
			scrollbarClass: '',\r
\r
			// Zoom\r
			zoom: false,\r
			zoomMin: 1,\r
			zoomMax: 4,\r
			doubleTapZoom: 2,\r
\r
			// Snap\r
			snap: false,\r
			snapThreshold: 1,\r
\r
			// Events\r
			onRefresh: null,\r
			onBeforeScrollStart: function (e) { e.preventDefault(); },\r
			onScrollStart: null,\r
			onBeforeScrollMove: null,\r
			onScrollMove: null,\r
			onBeforeScrollEnd: null,\r
			onScrollEnd: null,\r
			onTouchEnd: null,\r
			onDestroy: null\r
		};\r
\r
		// User defined options\r
		for (i in options) that.options[i] = options[i];\r
\r
		// Normalize options\r
		that.options.useTransform = hasTransform ? that.options.useTransform : false;\r
		that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;\r
		that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;\r
		that.options.zoom = that.options.useTransform && that.options.zoom;\r
		that.options.useTransition = hasTransitionEnd && that.options.useTransition;\r
		\r
		// Set some default styles\r
		that.scroller.style[vendor + 'TransitionProperty'] = that.options.useTransform ? '-' + vendor.toLowerCase() + '-transform' : 'top left';\r
		that.scroller.style[vendor + 'TransitionDuration'] = '0';\r
		that.scroller.style[vendor + 'TransformOrigin'] = '0 0';\r
		if (that.options.useTransition) that.scroller.style[vendor + 'TransitionTimingFunction'] = 'cubic-bezier(0.33,0.66,0.66,1)';\r
		\r
		if (that.options.useTransform) that.scroller.style[vendor + 'Transform'] = trnOpen + '0,0' + trnClose;\r
		else that.scroller.style.cssText += ';top:0;left:0';\r
\r
		if (that.options.useTransition) that.options.fixedScrollbar = true;\r
\r
		that.refresh();\r
\r
		that._bind(RESIZE_EV, window);\r
		that._bind(START_EV);\r
		if (!hasTouch) {\r
			that._bind('mouseout', that.wrapper);\r
			that._bind(WHEEL_EV);\r
		}\r
	};\r
\r
// Prototype\r
iScroll.prototype = {\r
	enabled: true,\r
	x: 0,\r
	y: 0,\r
	steps: [],\r
	scale: 1,\r
	currPageX: 0, currPageY: 0,\r
	pagesX: [], pagesY: [],\r
	aniTime: null,\r
	\r
	handleEvent: function (e) {\r
		var that = this;\r
		switch(e.type) {\r
			case START_EV: that._start(e); break;\r
			case MOVE_EV: that._move(e); break;\r
			case END_EV:\r
			case CANCEL_EV: that._end(e); break;\r
			case RESIZE_EV: that._resize(); break;\r
			case WHEEL_EV: that._wheel(e); break;\r
			case 'mouseout': that._mouseout(e); break;\r
			case 'webkitTransitionEnd': that._transitionEnd(e); break;\r
		}\r
	},\r
	\r
	_scrollbar: function (dir) {\r
		var that = this,\r
			doc = document,\r
			bar;\r
\r
		if (!that[dir + 'Scrollbar']) {\r
			if (that[dir + 'ScrollbarWrapper']) {\r
				if (hasTransform) that[dir + 'ScrollbarIndicator'].style[vendor + 'Transform'] = '';\r
				that[dir + 'ScrollbarWrapper'].parentNode.removeChild(that[dir + 'ScrollbarWrapper']);\r
				that[dir + 'ScrollbarWrapper'] = null;\r
				that[dir + 'ScrollbarIndicator'] = null;\r
			}\r
\r
			return;\r
		}\r
\r
		if (!that[dir + 'ScrollbarWrapper']) {\r
			// Create the scrollbar wrapper\r
			bar = doc.createElement('div');\r
\r
			if (that.options.scrollbarClass) bar.className = that.options.scrollbarClass + dir.toUpperCase();\r
			else bar.style.cssText = 'position:absolute;z-index:100;' + (dir == 'h' ? 'height:7px;bottom:1px;left:2px;right:' + (that.vScrollbar ? '7' : '2') + 'px' : 'width:7px;bottom:' + (that.hScrollbar ? '7' : '2') + 'px;top:2px;right:1px');\r
\r
			bar.style.cssText += ';pointer-events:none;-' + vendor + '-transition-property:opacity;-' + vendor + '-transition-duration:' + (that.options.fadeScrollbar ? '350ms' : '0') + ';overflow:hidden;opacity:' + (that.options.hideScrollbar ? '0' : '1');\r
\r
			that.wrapper.appendChild(bar);\r
			that[dir + 'ScrollbarWrapper'] = bar;\r
\r
			// Create the scrollbar indicator\r
			bar = doc.createElement('div');\r
			if (!that.options.scrollbarClass) {\r
				bar.style.cssText = 'position:absolute;z-index:100;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);-' + vendor + '-background-clip:padding-box;-' + vendor + '-box-sizing:border-box;' + (dir == 'h' ? 'height:100%' : 'width:100%') + ';-' + vendor + '-border-radius:3px;border-radius:3px';\r
			}\r
			bar.style.cssText += ';pointer-events:none;-' + vendor + '-transition-property:-' + vendor + '-transform;-' + vendor + '-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);-' + vendor + '-transition-duration:0;-' + vendor + '-transform:' + trnOpen + '0,0' + trnClose;\r
			if (that.options.useTransition) bar.style.cssText += ';-' + vendor + '-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1)';\r
\r
			that[dir + 'ScrollbarWrapper'].appendChild(bar);\r
			that[dir + 'ScrollbarIndicator'] = bar;\r
		}\r
\r
		if (dir == 'h') {\r
			that.hScrollbarSize = that.hScrollbarWrapper.clientWidth;\r
			that.hScrollbarIndicatorSize = m.max(m.round(that.hScrollbarSize * that.hScrollbarSize / that.scrollerW), 8);\r
			that.hScrollbarIndicator.style.width = that.hScrollbarIndicatorSize + 'px';\r
			that.hScrollbarMaxScroll = that.hScrollbarSize - that.hScrollbarIndicatorSize;\r
			that.hScrollbarProp = that.hScrollbarMaxScroll / that.maxScrollX;\r
		} else {\r
			that.vScrollbarSize = that.vScrollbarWrapper.clientHeight;\r
			that.vScrollbarIndicatorSize = m.max(m.round(that.vScrollbarSize * that.vScrollbarSize / that.scrollerH), 8);\r
			that.vScrollbarIndicator.style.height = that.vScrollbarIndicatorSize + 'px';\r
			that.vScrollbarMaxScroll = that.vScrollbarSize - that.vScrollbarIndicatorSize;\r
			that.vScrollbarProp = that.vScrollbarMaxScroll / that.maxScrollY;\r
		}\r
\r
		// Reset position\r
		that._scrollbarPos(dir, true);\r
	},\r
	\r
	_resize: function () {\r
		this.refresh();\r
	},\r
	\r
	_pos: function (x, y) {\r
		x = this.hScroll ? x : 0;\r
		y = this.vScroll ? y : 0;\r
\r
		if (this.options.useTransform) {\r
			this.scroller.style[vendor + 'Transform'] = trnOpen + x + 'px,' + y + 'px' + trnClose + ' scale(' + this.scale + ')';\r
		} else {\r
			x = m.round(x);\r
			y = m.round(y);\r
			this.scroller.style.left = x + 'px';\r
			this.scroller.style.top = y + 'px';\r
		}\r
\r
		this.x = x;\r
		this.y = y;\r
\r
		this._scrollbarPos('h');\r
		this._scrollbarPos('v');\r
	},\r
\r
	_scrollbarPos: function (dir, hidden) {\r
		var that = this,\r
			pos = dir == 'h' ? that.x : that.y,\r
			size;\r
		\r
		if (!that[dir + 'Scrollbar']) return;\r
		\r
		pos = that[dir + 'ScrollbarProp'] * pos;\r
	\r
		if (pos < 0) {\r
			if (!that.options.fixedScrollbar) {\r
				size = that[dir + 'ScrollbarIndicatorSize'] + m.round(pos * 3);\r
				if (size < 8) size = 8;\r
				that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px';\r
			}\r
			pos = 0;\r
		} else if (pos > that[dir + 'ScrollbarMaxScroll']) {\r
			if (!that.options.fixedScrollbar) {\r
				size = that[dir + 'ScrollbarIndicatorSize'] - m.round((pos - that[dir + 'ScrollbarMaxScroll']) * 3);\r
				if (size < 8) size = 8;\r
				that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px';\r
				pos = that[dir + 'ScrollbarMaxScroll'] + (that[dir + 'ScrollbarIndicatorSize'] - size);\r
			} else {\r
				pos = that[dir + 'ScrollbarMaxScroll'];\r
			}\r
		}\r
\r
		that[dir + 'ScrollbarWrapper'].style[vendor + 'TransitionDelay'] = '0';\r
		that[dir + 'ScrollbarWrapper'].style.opacity = hidden && that.options.hideScrollbar ? '0' : '1';\r
		that[dir + 'ScrollbarIndicator'].style[vendor + 'Transform'] = trnOpen + (dir == 'h' ? pos + 'px,0' : '0,' + pos + 'px') + trnClose;\r
	},\r
	\r
	_start: function (e) {\r
		var that = this,\r
			point = hasTouch ? e.touches[0] : e,\r
			matrix, x, y,\r
			c1, c2, target;\r
\r
		if (!that.enabled) return;\r
\r
		if (that.options.onBeforeScrollStart) that.options.onBeforeScrollStart.call(that, e);\r
\r
		if (that.options.useTransition) that._transitionTime(0);\r
\r
		that.moved = false;\r
		that.animating = false;\r
		that.zoomed = false;\r
		that.distX = 0;\r
		that.distY = 0;\r
		that.absDistX = 0;\r
		that.absDistY = 0;\r
		that.dirX = 0;\r
		that.dirY = 0;\r
\r
		// Gesture start\r
		if (that.options.zoom && hasTouch && e.touches.length > 1) {\r
			c1 = m.abs(e.touches[0].pageX-e.touches[1].pageX);\r
			c2 = m.abs(e.touches[0].pageY-e.touches[1].pageY);\r
			that.touchesDistStart = m.sqrt(c1 * c1 + c2 * c2);\r
\r
			that.originX = m.abs(e.touches[0].pageX + e.touches[1].pageX - that.wrapperOffsetLeft * 2) / 2 - that.x;\r
			that.originY = m.abs(e.touches[0].pageY + e.touches[1].pageY - that.wrapperOffsetTop * 2) / 2 - that.y;\r
		}\r
\r
		if (that.options.momentum) {\r
			if (that.options.useTransform) {\r
				// Very lame general purpose alternative to CSSMatrix\r
				matrix = getComputedStyle(that.scroller, null)[vendor + 'Transform'].replace(/[^0-9-.,]/g, '').split(',');\r
				x = matrix[4] * 1;\r
				y = matrix[5] * 1;\r
			} else {\r
				x = getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, '') * 1;\r
				y = getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, '') * 1;\r
			}\r
			\r
			if (x != that.x || y != that.y) {\r
				if (that.options.useTransition) that._unbind('webkitTransitionEnd');\r
				else cancelFrame(that.aniTime);\r
				that.steps = [];\r
				that._pos(x, y);\r
			}\r
		}\r
\r
		that.absStartX = that.x;	// Needed by snap threshold\r
		that.absStartY = that.y;\r
\r
		that.startX = that.x;\r
		that.startY = that.y;\r
		that.pointX = point.pageX;\r
		that.pointY = point.pageY;\r
\r
		that.startTime = e.timeStamp || (new Date()).getTime();\r
\r
		if (that.options.onScrollStart) that.options.onScrollStart.call(that, e);\r
\r
		that._bind(MOVE_EV);\r
		that._bind(END_EV);\r
		that._bind(CANCEL_EV);\r
	},\r
	\r
	_move: function (e) {\r
		var that = this,\r
			point = hasTouch ? e.touches[0] : e,\r
			deltaX = point.pageX - that.pointX,\r
			deltaY = point.pageY - that.pointY,\r
			newX = that.x + deltaX,\r
			newY = that.y + deltaY,\r
			c1, c2, scale,\r
			timestamp = e.timeStamp || (new Date()).getTime();\r
\r
		if (that.options.onBeforeScrollMove) that.options.onBeforeScrollMove.call(that, e);\r
\r
		// Zoom\r
		if (that.options.zoom && hasTouch && e.touches.length > 1) {\r
			c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);\r
			c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);\r
			that.touchesDist = m.sqrt(c1*c1+c2*c2);\r
\r
			that.zoomed = true;\r
\r
			scale = 1 / that.touchesDistStart * that.touchesDist * this.scale;\r
			if (scale < 0.5) scale = 0.5;\r
			else if (scale > that.options.zoomMax) scale = that.options.zoomMax;\r
			that.lastScale = scale / this.scale;\r
\r
			newX = this.originX - this.originX * that.lastScale + this.x,\r
			newY = this.originY - this.originY * that.lastScale + this.y;\r
\r
			this.scroller.style[vendor + 'Transform'] = trnOpen + newX + 'px,' + newY + 'px' + trnClose + ' scale(' + scale + ')';\r
\r
			return;\r
		}\r
\r
		that.pointX = point.pageX;\r
		that.pointY = point.pageY;\r
\r
		// Slow down if outside of the boundaries\r
		if (newX > 0 || newX < that.maxScrollX) {\r
			newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;\r
		}\r
		if (newY > 0 || newY < that.maxScrollY) { \r
			newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= 0 || that.maxScrollY >= 0 ? 0 : that.maxScrollY;\r
		}\r
\r
		if (that.absDistX < 6 && that.absDistY < 6) {\r
			that.distX += deltaX;\r
			that.distY += deltaY;\r
			that.absDistX = m.abs(that.distX);\r
			that.absDistY = m.abs(that.distY);\r
\r
			return;\r
		}\r
\r
		// Lock direction\r
		if (that.options.lockDirection) {\r
			if (that.absDistX > that.absDistY + 5) {\r
				newY = that.y;\r
				deltaY = 0;\r
			} else if (that.absDistY > that.absDistX + 5) {\r
				newX = that.x;\r
				deltaX = 0;\r
			}\r
		}\r
\r
		that.moved = true;\r
		that._pos(newX, newY);\r
		that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;\r
		that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;\r
\r
		if (timestamp - that.startTime > 300) {\r
			that.startTime = timestamp;\r
			that.startX = that.x;\r
			that.startY = that.y;\r
		}\r
		\r
		if (that.options.onScrollMove) that.options.onScrollMove.call(that, e);\r
	},\r
	\r
	_end: function (e) {\r
		if (hasTouch && e.touches.length != 0) return;\r
\r
		var that = this,\r
			point = hasTouch ? e.changedTouches[0] : e,\r
			target, ev,\r
			momentumX = { dist:0, time:0 },\r
			momentumY = { dist:0, time:0 },\r
			duration = (e.timeStamp || (new Date()).getTime()) - that.startTime,\r
			newPosX = that.x,\r
			newPosY = that.y,\r
			distX, distY,\r
			newDuration;\r
\r
		that._unbind(MOVE_EV);\r
		that._unbind(END_EV);\r
		that._unbind(CANCEL_EV);\r
\r
		if (that.options.onBeforeScrollEnd) that.options.onBeforeScrollEnd.call(that, e);\r
\r
		if (that.zoomed) {\r
			that.scale = that.scale * that.lastScale;\r
			that.x = that.originX - that.originX * that.lastScale + that.x;\r
			that.y = that.originY - that.originY * that.lastScale + that.y;\r
\r
			that.scroller.style.webkitTransform = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + that.scale + ')';\r
\r
			that.refresh();\r
			return;\r
		}\r
\r
		if (!that.moved) {\r
			if (hasTouch) {\r
				if (that.doubleTapTimer && that.options.zoom) {\r
					// Double tapped\r
					clearTimeout(that.doubleTapTimer);\r
					that.doubleTapTimer = null;\r
					that.zoom(that.pointX, that.pointY, that.scale == 1 ? that.options.doubleTapZoom : 1);\r
				} else {\r
					that.doubleTapTimer = setTimeout(function () {\r
						that.doubleTapTimer = null;\r
\r
						// Find the last touched element\r
						target = point.target;\r
						while (target.nodeType != 1) target = target.parentNode;\r
\r
						if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA') {\r
							ev = document.createEvent('MouseEvents');\r
							ev.initMouseEvent('click', true, true, e.view, 1,\r
								point.screenX, point.screenY, point.clientX, point.clientY,\r
								e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,\r
								0, null);\r
							ev._fake = true;\r
							target.dispatchEvent(ev);\r
						}\r
					}, that.options.zoom ? 250 : 0);\r
				}\r
			}\r
\r
			that._resetPos(200);\r
\r
			if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);\r
			return;\r
		}\r
\r
		if (duration < 300 && that.options.momentum) {\r
			momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;\r
			momentumY = newPosY ? that._momentum(newPosY - that.startY, duration, -that.y, (that.maxScrollY < 0 ? that.scrollerH - that.wrapperH + that.y : 0), that.options.bounce ? that.wrapperH : 0) : momentumY;\r
\r
			newPosX = that.x + momentumX.dist;\r
			newPosY = that.y + momentumY.dist;\r
\r
 			if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) momentumX = { dist:0, time:0 };\r
 			if ((that.y > 0 && newPosY > 0) || (that.y < that.maxScrollY && newPosY < that.maxScrollY)) momentumY = { dist:0, time:0 };\r
		}\r
\r
		if (momentumX.dist || momentumY.dist) {\r
			newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);\r
\r
			// Do we need to snap?\r
			if (that.options.snap) {\r
				distX = newPosX - that.absStartX;\r
				distY = newPosY - that.absStartY;\r
				if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) { that.scrollTo(that.absStartX, that.absStartY, 200); }\r
				else {\r
					snap = that._snap(newPosX, newPosY);\r
					newPosX = snap.x;\r
					newPosY = snap.y;\r
					newDuration = m.max(snap.time, newDuration);\r
				}\r
			}\r
\r
			that.scrollTo(newPosX, newPosY, newDuration);\r
\r
			if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);\r
			return;\r
		}\r
\r
		// Do we need to snap?\r
		if (that.options.snap) {\r
			distX = newPosX - that.absStartX;\r
			distY = newPosY - that.absStartY;\r
			if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) that.scrollTo(that.absStartX, that.absStartY, 200);\r
			else {\r
				snap = that._snap(that.x, that.y);\r
				if (snap.x != that.x || snap.y != that.y) that.scrollTo(snap.x, snap.y, snap.time);\r
			}\r
\r
			if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);\r
			return;\r
		}\r
\r
		that._resetPos(200);\r
		if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);\r
	},\r
	\r
	_resetPos: function (time) {\r
		var that = this,\r
			resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,\r
			resetY = that.y >= 0 || that.maxScrollY > 0 ? 0 : that.y < that.maxScrollY ? that.maxScrollY : that.y;\r
\r
		if (resetX == that.x && resetY == that.y) {\r
			if (that.moved) {\r
				that.moved = false;\r
				if (that.options.onScrollEnd) that.options.onScrollEnd.call(that);		// Execute custom code on scroll end\r
			}\r
\r
			if (that.hScrollbar && that.options.hideScrollbar) {\r
				if (vendor == 'webkit') that.hScrollbarWrapper.style[vendor + 'TransitionDelay'] = '300ms';\r
				that.hScrollbarWrapper.style.opacity = '0';\r
			}\r
			if (that.vScrollbar && that.options.hideScrollbar) {\r
				if (vendor == 'webkit') that.vScrollbarWrapper.style[vendor + 'TransitionDelay'] = '300ms';\r
				that.vScrollbarWrapper.style.opacity = '0';\r
			}\r
\r
			return;\r
		}\r
\r
		that.scrollTo(resetX, resetY, time || 0);\r
	},\r
\r
	_wheel: function (e) {\r
		var that = this,\r
			deltaX, deltaY;\r
\r
		if ('wheelDeltaX' in e) {\r
			deltaX = that.x + e.wheelDeltaX / 12,\r
			deltaY = that.y + e.wheelDeltaY / 12;\r
		} else if ('detail' in e) {\r
			deltaX = that.x - e.detail * 3,\r
			deltaY = that.y - e.detail * 3;\r
		} else {\r
			deltaX = that.x - e.wheelDelta,\r
			deltaY = that.y - e.wheelDelta;\r
		}\r
\r
		if (deltaX > 0) deltaX = 0;\r
		else if (deltaX < that.maxScrollX) deltaX = that.maxScrollX;\r
\r
		if (deltaY > 0) deltaY = 0;\r
		else if (deltaY < that.maxScrollY) deltaY = that.maxScrollY;\r
\r
		that.scrollTo(deltaX, deltaY, 0);\r
	},\r
	\r
	_mouseout: function (e) {\r
		var t = e.relatedTarget;\r
\r
		if (!t) {\r
			this._end(e);\r
			return;\r
		}\r
\r
		while (t = t.parentNode) if (t == this.wrapper) return;\r
		\r
		this._end(e);\r
	},\r
\r
	_transitionEnd: function (e) {\r
		var that = this;\r
\r
		if (e.target != that.scroller) return;\r
\r
		that._unbind('webkitTransitionEnd');\r
		\r
		that._startAni();\r
	},\r
\r
\r
	/**\r
	 *\r
	 * Utilities\r
	 *\r
	 */\r
	_startAni: function () {\r
		var that = this,\r
			startX = that.x, startY = that.y,\r
			startTime = (new Date).getTime(),\r
			step, easeOut;\r
\r
		if (that.animating) return;\r
		\r
		if (!that.steps.length) {\r
			that._resetPos(400);\r
			return;\r
		}\r
		\r
		step = that.steps.shift();\r
		\r
		if (step.x == startX && step.y == startY) step.time = 0;\r
\r
		that.animating = true;\r
		that.moved = true;\r
		\r
		if (that.options.useTransition) {\r
			that._transitionTime(step.time);\r
			that._pos(step.x, step.y);\r
			that.animating = false;\r
			if (step.time) that._bind('webkitTransitionEnd');\r
			return;\r
		}\r
\r
		(function animate () {\r
			var now = (new Date).getTime(),\r
				newX, newY;\r
\r
			if (now >= startTime + step.time) {\r
				that._pos(step.x, step.y);\r
				that.animating = false;\r
				if (that.options.onAnimationEnd) that.options.onAnimationEnd.call(that);			// Execute custom code on animation end\r
				that._startAni();\r
				return;\r
			}\r
\r
			now = (now - startTime) / step.time - 1;\r
			easeOut = m.sqrt(1 - now * now);\r
			newX = (step.x - startX) * easeOut + startX;\r
			newY = (step.y - startY) * easeOut + startY;\r
			that._pos(newX, newY);\r
			if (that.animating) that.aniTime = nextFrame(animate);\r
		})();\r
	},\r
\r
	_transitionTime: function (time) {\r
		time += 'ms';\r
		this.scroller.style[vendor + 'TransitionDuration'] = time;\r
		if (this.hScrollbar) this.hScrollbarIndicator.style[vendor + 'TransitionDuration'] = time;\r
		if (this.vScrollbar) this.vScrollbarIndicator.style[vendor + 'TransitionDuration'] = time;\r
	},\r
\r
	_momentum: function (dist, time, maxDistUpper, maxDistLower, size) {\r
		var deceleration = 0.0006,\r
			speed = m.abs(dist) / time,\r
			newDist = (speed * speed) / (2 * deceleration),\r
			newTime = 0, outsideDist = 0;\r
\r
		// Proportinally reduce speed if we are outside of the boundaries \r
		if (dist > 0 && newDist > maxDistUpper) {\r
			outsideDist = size / (6 / (newDist / speed * deceleration));\r
			maxDistUpper = maxDistUpper + outsideDist;\r
			speed = speed * maxDistUpper / newDist;\r
			newDist = maxDistUpper;\r
		} else if (dist < 0 && newDist > maxDistLower) {\r
			outsideDist = size / (6 / (newDist / speed * deceleration));\r
			maxDistLower = maxDistLower + outsideDist;\r
			speed = speed * maxDistLower / newDist;\r
			newDist = maxDistLower;\r
		}\r
\r
		newDist = newDist * (dist < 0 ? -1 : 1);\r
		newTime = speed / deceleration;\r
\r
		return { dist: newDist, time: m.round(newTime) };\r
	},\r
\r
	_offset: function (el) {\r
		var left = -el.offsetLeft,\r
			top = -el.offsetTop;\r
			\r
		while (el = el.offsetParent) {\r
			left -= el.offsetLeft;\r
			top -= el.offsetTop;\r
		}\r
		\r
		if (el != this.wrapper) {\r
			left *= this.scale;\r
			top *= this.scale;\r
		}\r
\r
		return { left: left, top: top };\r
	},\r
\r
	_snap: function (x, y) {\r
		var that = this,\r
			i, l,\r
			page, time,\r
			sizeX, sizeY;\r
\r
		// Check page X\r
		page = that.pagesX.length - 1;\r
		for (i=0, l=that.pagesX.length; i<l; i++) {\r
			if (x >= that.pagesX[i]) {\r
				page = i;\r
				break;\r
			}\r
		}\r
		if (page == that.currPageX && page > 0 && that.dirX < 0) page--;\r
		x = that.pagesX[page];\r
		sizeX = m.abs(x - that.pagesX[that.currPageX]);\r
		sizeX = sizeX ? m.abs(that.x - x) / sizeX * 500 : 0;\r
		that.currPageX = page;\r
\r
		// Check page Y\r
		page = that.pagesY.length-1;\r
		for (i=0; i<page; i++) {\r
			if (y >= that.pagesY[i]) {\r
				page = i;\r
				break;\r
			}\r
		}\r
		if (page == that.currPageY && page > 0 && that.dirY < 0) page--;\r
		y = that.pagesY[page];\r
		sizeY = m.abs(y - that.pagesY[that.currPageY]);\r
		sizeY = sizeY ? m.abs(that.y - y) / sizeY * 500 : 0;\r
		that.currPageY = page;\r
\r
		// Snap with constant speed (proportional duration)\r
		time = m.round(m.max(sizeX, sizeY)) || 200;\r
\r
		return { x: x, y: y, time: time };\r
	},\r
\r
	_bind: function (type, el, bubble) {\r
		(el || this.scroller).addEventListener(type, this, !!bubble);\r
	},\r
\r
	_unbind: function (type, el, bubble) {\r
		(el || this.scroller).removeEventListener(type, this, !!bubble);\r
	},\r
\r
\r
	/**\r
	 *\r
	 * Public methods\r
	 *\r
	 */\r
	destroy: function () {\r
		var that = this;\r
\r
		that.scroller.style[vendor + 'Transform'] = '';\r
\r
		// Remove the scrollbars\r
		that.hScrollbar = false;\r
		that.vScrollbar = false;\r
		that._scrollbar('h');\r
		that._scrollbar('v');\r
\r
		// Remove the event listeners\r
		that._unbind(RESIZE_EV);\r
		that._unbind(START_EV);\r
		that._unbind(MOVE_EV);\r
		that._unbind(END_EV);\r
		that._unbind(CANCEL_EV);\r
		\r
		if (that.options.hasTouch) {\r
			that._unbind('mouseout', that.wrapper);\r
			that._unbind(WHEEL_EV);\r
		}\r
		\r
		if (that.options.useTransition) that._unbind('webkitTransitionEnd');\r
		\r
		if (that.options.onDestroy) that.options.onDestroy.call(that);\r
	},\r
\r
	refresh: function () {\r
		var that = this,\r
			offset,\r
			pos = 0,\r
			page = 0;\r
\r
		if (that.scale < that.options.zoomMin) that.scale = that.options.zoomMin;\r
		that.wrapperW = that.wrapper.clientWidth || 1;\r
		that.wrapperH = that.wrapper.clientHeight || 1;\r
\r
		that.scrollerW = m.round(that.scroller.offsetWidth * that.scale);\r
		that.scrollerH = m.round(that.scroller.offsetHeight * that.scale);\r
		that.maxScrollX = that.wrapperW - that.scrollerW;\r
		that.maxScrollY = that.wrapperH - that.scrollerH;\r
		that.dirX = 0;\r
		that.dirY = 0;\r
\r
		that.hScroll = that.options.hScroll && that.maxScrollX < 0;\r
		that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);\r
\r
		that.hScrollbar = that.hScroll && that.options.hScrollbar;\r
		that.vScrollbar = that.vScroll && that.options.vScrollbar && that.scrollerH > that.wrapperH;\r
\r
		offset = that._offset(that.wrapper);\r
		that.wrapperOffsetLeft = -offset.left;\r
		that.wrapperOffsetTop = -offset.top;\r
\r
		// Prepare snap\r
		if (typeof that.options.snap == 'string') {\r
			that.pagesX = [];\r
			that.pagesY = [];\r
			els = that.scroller.querySelectorAll(that.options.snap);\r
			for (i=0, l=els.length; i<l; i++) {\r
				pos = that._offset(els[i]);\r
				pos.left += that.wrapperOffsetLeft;\r
				pos.top += that.wrapperOffsetTop;\r
				that.pagesX[i] = pos.left < that.maxScrollX ? that.maxScrollX : pos.left * that.scale;\r
				that.pagesY[i] = pos.top < that.maxScrollY ? that.maxScrollY : pos.top * that.scale;\r
			}\r
		} else if (that.options.snap) {\r
			that.pagesX = [];\r
			while (pos >= that.maxScrollX) {\r
				that.pagesX[page] = pos;\r
				pos = pos - that.wrapperW;\r
				page++;\r
			}\r
			if (that.maxScrollX%that.wrapperW) that.pagesX[that.pagesX.length] = that.maxScrollX - that.pagesX[that.pagesX.length-1] + that.pagesX[that.pagesX.length-1];\r
\r
			pos = 0;\r
			page = 0;\r
			that.pagesY = [];\r
			while (pos >= that.maxScrollY) {\r
				that.pagesY[page] = pos;\r
				pos = pos - that.wrapperH;\r
				page++;\r
			}\r
			if (that.maxScrollY%that.wrapperH) that.pagesY[that.pagesY.length] = that.maxScrollY - that.pagesY[that.pagesY.length-1] + that.pagesY[that.pagesY.length-1];\r
		}\r
\r
		// Prepare the scrollbars\r
		that._scrollbar('h');\r
		that._scrollbar('v');\r
\r
		that.scroller.style[vendor + 'TransitionDuration'] = '0';\r
\r
		that._resetPos(200);\r
	},\r
\r
	scrollTo: function (x, y, time, relative) {\r
		var that = this,\r
			step = x,\r
			i, l;\r
\r
		that.stop();\r
\r
		if (!step.length) step = [{ x: x, y: y, time: time, relative: relative }];\r
		\r
		for (i=0, l=step.length; i<l; i++) {\r
			if (step[i].relative) { step[i].x = that.x - step[i].x; step[i].y = that.y - step[i].y; }\r
			that.steps.push({ x: step[i].x, y: step[i].y, time: step[i].time || 0 });\r
		}\r
\r
		that._startAni();\r
	},\r
\r
	scrollToElement: function (el, time) {\r
		var that = this, pos;\r
		el = el.nodeType ? el : that.scroller.querySelector(el);\r
		if (!el) return;\r
\r
		pos = that._offset(el);\r
		pos.left += that.wrapperOffsetLeft;\r
		pos.top += that.wrapperOffsetTop;\r
\r
		pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left;\r
		pos.top = pos.top > 0 ? 0 : pos.top < that.maxScrollY ? that.maxScrollY : pos.top;\r
		time = time === undefined ? m.max(m.abs(pos.left)*2, m.abs(pos.top)*2) : time;\r
\r
		that.scrollTo(pos.left, pos.top, time);\r
	},\r
\r
	scrollToPage: function (pageX, pageY, time) {\r
		var that = this, x, y;\r
		\r
		if (that.options.snap) {\r
			pageX = pageX == 'next' ? that.currPageX+1 : pageX == 'prev' ? that.currPageX-1 : pageX;\r
			pageY = pageY == 'next' ? that.currPageY+1 : pageY == 'prev' ? that.currPageY-1 : pageY;\r
\r
			pageX = pageX < 0 ? 0 : pageX > that.pagesX.length-1 ? that.pagesX.length-1 : pageX;\r
			pageY = pageY < 0 ? 0 : pageY > that.pagesY.length-1 ? that.pagesY.length-1 : pageY;\r
\r
			that.currPageX = pageX;\r
			that.currPageY = pageY;\r
			x = that.pagesX[pageX];\r
			y = that.pagesY[pageY];\r
		} else {\r
			x = -that.wrapperW * pageX;\r
			y = -that.wrapperH * pageY;\r
			if (x < that.maxScrollX) x = that.maxScrollX;\r
			if (y < that.maxScrollY) y = that.maxScrollY;\r
		}\r
\r
		that.scrollTo(x, y, time || 400);\r
	},\r
\r
	disable: function () {\r
		this.stop();\r
		this._resetPos(0);\r
		this.enabled = false;\r
\r
		// If disabled after touchstart we make sure that there are no left over events\r
		this._unbind(MOVE_EV);\r
		this._unbind(END_EV);\r
		this._unbind(CANCEL_EV);\r
	},\r
	\r
	enable: function () {\r
		this.enabled = true;\r
	},\r
	\r
	stop: function () {\r
		if (this.options.useTransition) this._unbind('webkitTransitionEnd');\r
		else cancelFrame(this.aniTime);\r
		this.steps = [];\r
		this.moved = false;\r
		this.animating = false;\r
	},\r
	\r
	zoom: function (x, y, scale, time) {\r
		var that = this,\r
			relScale = scale / that.scale;\r
\r
		if (!that.options.useTransform) return;\r
\r
		time = (time || 200) + 'ms'\r
		x = x - that.wrapperOffsetLeft - that.x;\r
		y = y - that.wrapperOffsetTop - that.y;\r
		that.x = x - x * relScale + that.x;\r
		that.y = y - y * relScale + that.y;\r
\r
		that.scale = scale;\r
\r
		that.scroller.style[vendor + 'TransitionDuration'] = time;\r
		that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + scale + ')';\r
\r
		that.refresh();\r
	}\r
};\r
\r
if (typeof exports !== 'undefined') exports.iScroll = iScroll;\r
else window.iScroll = iScroll;\r
\r
})();