Remove iScroll reference, now LungoJS uses iScroll-Lite

src/lib/iscroll-lite.js

@@ -0,0 +1,594 @@
+/*!
+ * iScroll Lite base on iScroll v4.1.6 ~ Copyright (c) 2011 Matteo Spinelli, http://cubiq.org
+ * Released under MIT license, http://cubiq.org/license
+ */
+
+(function(){
+var m = Math,
+	mround = function (r) { return r >> 0; },
+	vendor = (/webkit/i).test(navigator.appVersion) ? 'webkit' :
+		(/firefox/i).test(navigator.userAgent) ? 'Moz' :
+		'opera' in window ? 'O' : '',
+
+    // Browser capabilities
+    isAndroid = (/android/gi).test(navigator.appVersion),
+    isIDevice = (/iphone|ipad/gi).test(navigator.appVersion),
+    isPlaybook = (/playbook/gi).test(navigator.appVersion),
+    isTouchPad = (/hp-tablet/gi).test(navigator.appVersion),
+
+    has3d = 'WebKitCSSMatrix' in window && 'm11' in new WebKitCSSMatrix(),
+    hasTouch = 'ontouchstart' in window && !isTouchPad,
+    hasTransform = vendor + 'Transform' in document.documentElement.style,
+    hasTransitionEnd = isIDevice || isPlaybook,
+
+	nextFrame = (function() {
+	    return window.requestAnimationFrame
+			|| window.webkitRequestAnimationFrame
+			|| window.mozRequestAnimationFrame
+			|| window.oRequestAnimationFrame
+			|| window.msRequestAnimationFrame
+			|| function(callback) { return setTimeout(callback, 17); }
+	})(),
+	cancelFrame = (function () {
+	    return window.cancelRequestAnimationFrame
+			|| window.webkitCancelAnimationFrame
+			|| window.webkitCancelRequestAnimationFrame
+			|| window.mozCancelRequestAnimationFrame
+			|| window.oCancelRequestAnimationFrame
+			|| window.msCancelRequestAnimationFrame
+			|| clearTimeout
+	})(),
+
+	// Events
+	RESIZE_EV = 'onorientationchange' in window ? 'orientationchange' : 'resize',
+	START_EV = hasTouch ? 'touchstart' : 'mousedown',
+	MOVE_EV = hasTouch ? 'touchmove' : 'mousemove',
+	END_EV = hasTouch ? 'touchend' : 'mouseup',
+	CANCEL_EV = hasTouch ? 'touchcancel' : 'mouseup',
+
+	// Helpers
+	trnOpen = 'translate' + (has3d ? '3d(' : '('),
+	trnClose = has3d ? ',0)' : ')',
+
+	// Constructor
+	iScroll = function (el, options) {
+		var that = this,
+			doc = document,
+			i;
+
+		that.wrapper = typeof el == 'object' ? el : doc.getElementById(el);
+		that.wrapper.style.overflow = 'hidden';
+		that.scroller = that.wrapper.children[0];
+
+		// Default options
+		that.options = {
+			hScroll: true,
+			vScroll: true,
+			x: 0,
+			y: 0,
+			bounce: true,
+			bounceLock: false,
+			momentum: true,
+			lockDirection: true,
+			useTransform: true,
+			useTransition: false,
+
+			// Events
+			onRefresh: null,
+			onBeforeScrollStart: function (e) { e.preventDefault(); },
+			onScrollStart: null,
+			onBeforeScrollMove: null,
+			onScrollMove: null,
+			onBeforeScrollEnd: null,
+			onScrollEnd: null,
+			onTouchEnd: null,
+			onDestroy: null
+		};
+
+		// User defined options
+		for (i in options) that.options[i] = options[i];
+
+		// Set starting position
+		that.x = that.options.x;
+		that.y = that.options.y;
+
+		// Normalize options
+		that.options.useTransform = hasTransform ? that.options.useTransform : false;
+		that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;
+		that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;
+		that.options.useTransition = hasTransitionEnd && that.options.useTransition;
+
+		// Set some default styles
+		that.scroller.style[vendor + 'TransitionProperty'] = that.options.useTransform ? '-' + vendor.toLowerCase() + '-transform' : 'top left';
+		that.scroller.style[vendor + 'TransitionDuration'] = '0';
+		that.scroller.style[vendor + 'TransformOrigin'] = '0 0';
+		if (that.options.useTransition) that.scroller.style[vendor + 'TransitionTimingFunction'] = 'cubic-bezier(0.33,0.66,0.66,1)';
+		
+		if (that.options.useTransform) that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose;
+		else that.scroller.style.cssText += ';position:absolute;top:' + that.y + 'px;left:' + that.x + 'px';
+
+		that.refresh();
+
+		that._bind(RESIZE_EV, window);
+		that._bind(START_EV);
+		if (!hasTouch) that._bind('mouseout', that.wrapper);
+	};
+
+// Prototype
+iScroll.prototype = {
+	enabled: true,
+	x: 0,
+	y: 0,
+	steps: [],
+	scale: 1,
+	
+	handleEvent: function (e) {
+		var that = this;
+		switch(e.type) {
+			case START_EV:
+				if (!hasTouch && e.button !== 0) return;
+				that._start(e);
+				break;
+			case MOVE_EV: that._move(e); break;
+			case END_EV:
+			case CANCEL_EV: that._end(e); break;
+			case RESIZE_EV: that._resize(); break;
+			case 'mouseout': that._mouseout(e); break;
+			case 'webkitTransitionEnd': that._transitionEnd(e); break;
+		}
+	},
+
+	_resize: function () {
+		this.refresh();
+	},
+	
+	_pos: function (x, y) {
+		x = this.hScroll ? x : 0;
+		y = this.vScroll ? y : 0;
+
+		if (this.options.useTransform) {
+			this.scroller.style[vendor + 'Transform'] = trnOpen + x + 'px,' + y + 'px' + trnClose + ' scale(' + this.scale + ')';
+		} else {
+			x = mround(x);
+			y = mround(y);
+			this.scroller.style.left = x + 'px';
+			this.scroller.style.top = y + 'px';
+		}
+
+		this.x = x;
+		this.y = y;
+	},
+
+	_start: function (e) {
+		var that = this,
+			point = hasTouch ? e.touches[0] : e,
+			matrix, x, y;
+
+		if (!that.enabled) return;
+
+		if (that.options.onBeforeScrollStart) that.options.onBeforeScrollStart.call(that, e);
+		
+		if (that.options.useTransition) that._transitionTime(0);
+
+		that.moved = false;
+		that.animating = false;
+		that.zoomed = false;
+		that.distX = 0;
+		that.distY = 0;
+		that.absDistX = 0;
+		that.absDistY = 0;
+		that.dirX = 0;
+		that.dirY = 0;
+
+		if (that.options.momentum) {
+			if (that.options.useTransform) {
+				// Very lame general purpose alternative to CSSMatrix
+				matrix = getComputedStyle(that.scroller, null)[vendor + 'Transform'].replace(/[^0-9-.,]/g, '').split(',');
+				x = matrix[4] * 1;
+				y = matrix[5] * 1;
+			} else {
+				x = getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, '') * 1;
+				y = getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, '') * 1;
+			}
+			
+			if (x != that.x || y != that.y) {
+				if (that.options.useTransition) that._unbind('webkitTransitionEnd');
+				else cancelFrame(that.aniTime);
+				that.steps = [];
+				that._pos(x, y);
+			}
+		}
+
+		that.startX = that.x;
+		that.startY = that.y;
+		that.pointX = point.pageX;
+		that.pointY = point.pageY;
+
+		that.startTime = e.timeStamp || Date.now();
+
+		if (that.options.onScrollStart) that.options.onScrollStart.call(that, e);
+
+		that._bind(MOVE_EV);
+		that._bind(END_EV);
+		that._bind(CANCEL_EV);
+	},
+	
+	_move: function (e) {
+		var that = this,
+			point = hasTouch ? e.touches[0] : e,
+			deltaX = point.pageX - that.pointX,
+			deltaY = point.pageY - that.pointY,
+			newX = that.x + deltaX,
+			newY = that.y + deltaY,
+			timestamp = e.timeStamp || Date.now();
+
+		if (that.options.onBeforeScrollMove) that.options.onBeforeScrollMove.call(that, e);
+
+		that.pointX = point.pageX;
+		that.pointY = point.pageY;
+
+		// Slow down if outside of the boundaries
+		if (newX > 0 || newX < that.maxScrollX) {
+			newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;
+		}
+		if (newY > 0 || newY < that.maxScrollY) { 
+			newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= 0 || that.maxScrollY >= 0 ? 0 : that.maxScrollY;
+		}
+
+		if (that.absDistX < 6 && that.absDistY < 6) {
+			that.distX += deltaX;
+			that.distY += deltaY;
+			that.absDistX = m.abs(that.distX);
+			that.absDistY = m.abs(that.distY);
+
+			return;
+		}
+
+		// Lock direction
+		if (that.options.lockDirection) {
+			if (that.absDistX > that.absDistY + 5) {
+				newY = that.y;
+				deltaY = 0;
+			} else if (that.absDistY > that.absDistX + 5) {
+				newX = that.x;
+				deltaX = 0;
+			}
+		}
+
+		that.moved = true;
+		that._pos(newX, newY);
+		that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
+		that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;
+
+		if (timestamp - that.startTime > 300) {
+			that.startTime = timestamp;
+			that.startX = that.x;
+			that.startY = that.y;
+		}
+		
+		if (that.options.onScrollMove) that.options.onScrollMove.call(that, e);
+	},
+	
+	_end: function (e) {
+		if (hasTouch && e.touches.length != 0) return;
+
+		var that = this,
+			point = hasTouch ? e.changedTouches[0] : e,
+			target, ev,
+			momentumX = { dist:0, time:0 },
+			momentumY = { dist:0, time:0 },
+			duration = (e.timeStamp || Date.now()) - that.startTime,
+			newPosX = that.x,
+			newPosY = that.y,
+			newDuration;
+
+		that._unbind(MOVE_EV);
+		that._unbind(END_EV);
+		that._unbind(CANCEL_EV);
+
+		if (that.options.onBeforeScrollEnd) that.options.onBeforeScrollEnd.call(that, e);
+
+		if (!that.moved) {
+			if (hasTouch) {
+				// Find the last touched element
+				target = point.target;
+				while (target.nodeType != 1) target = target.parentNode;
+
+				if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA') {
+					ev = document.createEvent('MouseEvents');
+					ev.initMouseEvent('click', true, true, e.view, 1,
+						point.screenX, point.screenY, point.clientX, point.clientY,
+						e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
+						0, null);
+					ev._fake = true;
+					target.dispatchEvent(ev);
+				}
+			}
+
+			that._resetPos(200);
+
+			if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
+			return;
+		}
+
+		if (duration < 300 && that.options.momentum) {
+			momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;
+			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;
+
+			newPosX = that.x + momentumX.dist;
+			newPosY = that.y + momentumY.dist;
+
+ 			if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) momentumX = { dist:0, time:0 };
+ 			if ((that.y > 0 && newPosY > 0) || (that.y < that.maxScrollY && newPosY < that.maxScrollY)) momentumY = { dist:0, time:0 };
+		}
+
+		if (momentumX.dist || momentumY.dist) {
+			newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);
+
+			that.scrollTo(mround(newPosX), mround(newPosY), newDuration);
+
+			if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
+			return;
+		}
+
+		that._resetPos(200);
+		if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
+	},
+	
+	_resetPos: function (time) {
+		var that = this,
+			resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,
+			resetY = that.y >= 0 || that.maxScrollY > 0 ? 0 : that.y < that.maxScrollY ? that.maxScrollY : that.y;
+
+		if (resetX == that.x && resetY == that.y) {
+			if (that.moved) {
+				if (that.options.onScrollEnd) that.options.onScrollEnd.call(that);		// Execute custom code on scroll end
+				that.moved = false;
+			}
+
+			return;
+		}
+
+		that.scrollTo(resetX, resetY, time || 0);
+	},
+	
+	_mouseout: function (e) {
+		var t = e.relatedTarget;
+
+		if (!t) {
+			this._end(e);
+			return;
+		}
+
+		while (t = t.parentNode) if (t == this.wrapper) return;
+		
+		this._end(e);
+	},
+
+	_transitionEnd: function (e) {
+		var that = this;
+
+		if (e.target != that.scroller) return;
+
+		that._unbind('webkitTransitionEnd');
+		
+		that._startAni();
+	},
+
+	/**
+	 *
+	 * Utilities
+	 *
+	 */
+	_startAni: function () {
+		var that = this,
+			startX = that.x, startY = that.y,
+			startTime = Date.now(),
+			step, easeOut,
+			animate;
+
+		if (that.animating) return;
+
+		if (!that.steps.length) {
+			that._resetPos(400);
+			return;
+		}
+
+		step = that.steps.shift();
+
+		if (step.x == startX && step.y == startY) step.time = 0;
+
+		that.animating = true;
+		that.moved = true;
+
+		if (that.options.useTransition) {
+			that._transitionTime(step.time);
+			that._pos(step.x, step.y);
+			that.animating = false;
+			if (step.time) that._bind('webkitTransitionEnd');
+			else that._resetPos(0);
+			return;
+		}
+		
+		animate = function () {
+			var now = Date.now(),
+				newX, newY;
+
+			if (now >= startTime + step.time) {
+				that._pos(step.x, step.y);
+				that.animating = false;
+				if (that.options.onAnimationEnd) that.options.onAnimationEnd.call(that);			// Execute custom code on animation end
+				that._startAni();
+				return;
+			}
+
+			now = (now - startTime) / step.time - 1;
+			easeOut = m.sqrt(1 - now * now);
+			newX = (step.x - startX) * easeOut + startX;
+			newY = (step.y - startY) * easeOut + startY;
+			that._pos(newX, newY);
+			if (that.animating) that.aniTime = nextFrame(animate);
+		};
+		
+		animate();
+	},
+
+	_transitionTime: function (time) {
+		this.scroller.style[vendor + 'TransitionDuration'] = time + 'ms';
+	},
+	
+	_momentum: function (dist, time, maxDistUpper, maxDistLower, size) {
+		var deceleration = 0.0006,
+			speed = m.abs(dist) / time,
+			newDist = (speed * speed) / (2 * deceleration),
+			newTime = 0, outsideDist = 0;
+
+		// Proportinally reduce speed if we are outside of the boundaries 
+		if (dist > 0 && newDist > maxDistUpper) {
+			outsideDist = size / (6 / (newDist / speed * deceleration));
+			maxDistUpper = maxDistUpper + outsideDist;
+			speed = speed * maxDistUpper / newDist;
+			newDist = maxDistUpper;
+		} else if (dist < 0 && newDist > maxDistLower) {
+			outsideDist = size / (6 / (newDist / speed * deceleration));
+			maxDistLower = maxDistLower + outsideDist;
+			speed = speed * maxDistLower / newDist;
+			newDist = maxDistLower;
+		}
+
+		newDist = newDist * (dist < 0 ? -1 : 1);
+		newTime = speed / deceleration;
+
+		return { dist: newDist, time: mround(newTime) };
+	},
+
+	_offset: function (el) {
+		var left = -el.offsetLeft,
+			top = -el.offsetTop;
+			
+		while (el = el.offsetParent) {
+			left -= el.offsetLeft;
+			top -= el.offsetTop;
+		} 
+
+		return { left: left, top: top };
+	},
+
+	_bind: function (type, el, bubble) {
+		(el || this.scroller).addEventListener(type, this, !!bubble);
+	},
+
+	_unbind: function (type, el, bubble) {
+		(el || this.scroller).removeEventListener(type, this, !!bubble);
+	},
+
+
+	/**
+	 *
+	 * Public methods
+	 *
+	 */
+	destroy: function () {
+		var that = this;
+
+		that.scroller.style[vendor + 'Transform'] = '';
+
+		// Remove the event listeners
+		that._unbind(RESIZE_EV, window);
+		that._unbind(START_EV);
+		that._unbind(MOVE_EV);
+		that._unbind(END_EV);
+		that._unbind(CANCEL_EV);
+		that._unbind('mouseout', that.wrapper);
+		if (that.options.useTransition) that._unbind('webkitTransitionEnd');
+		
+		if (that.options.onDestroy) that.options.onDestroy.call(that);
+	},
+
+	refresh: function () {
+		var that = this,
+			offset;
+
+		that.wrapperW = that.wrapper.clientWidth;
+		that.wrapperH = that.wrapper.clientHeight;
+
+		that.scrollerW = that.scroller.offsetWidth;
+		that.scrollerH = that.scroller.offsetHeight;
+		that.maxScrollX = that.wrapperW - that.scrollerW;
+		that.maxScrollY = that.wrapperH - that.scrollerH;
+		that.dirX = 0;
+		that.dirY = 0;
+
+		that.hScroll = that.options.hScroll && that.maxScrollX < 0;
+		that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);
+
+		offset = that._offset(that.wrapper);
+		that.wrapperOffsetLeft = -offset.left;
+		that.wrapperOffsetTop = -offset.top;
+
+
+		that.scroller.style[vendor + 'TransitionDuration'] = '0';
+
+		that._resetPos(200);
+	},
+
+	scrollTo: function (x, y, time, relative) {
+		var that = this,
+			step = x,
+			i, l;
+
+		that.stop();
+
+		if (!step.length) step = [{ x: x, y: y, time: time, relative: relative }];
+		
+		for (i=0, l=step.length; i<l; i++) {
+			if (step[i].relative) { step[i].x = that.x - step[i].x; step[i].y = that.y - step[i].y; }
+			that.steps.push({ x: step[i].x, y: step[i].y, time: step[i].time || 0 });
+		}
+
+		that._startAni();
+	},
+
+	scrollToElement: function (el, time) {
+		var that = this, pos;
+		el = el.nodeType ? el : that.scroller.querySelector(el);
+		if (!el) return;
+
+		pos = that._offset(el);
+		pos.left += that.wrapperOffsetLeft;
+		pos.top += that.wrapperOffsetTop;
+
+		pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left;
+		pos.top = pos.top > 0 ? 0 : pos.top < that.maxScrollY ? that.maxScrollY : pos.top;
+		time = time === undefined ? m.max(m.abs(pos.left)*2, m.abs(pos.top)*2) : time;
+
+		that.scrollTo(pos.left, pos.top, time);
+	},
+
+	disable: function () {
+		this.stop();
+		this._resetPos(0);
+		this.enabled = false;
+
+		// If disabled after touchstart we make sure that there are no left over events
+		this._unbind(MOVE_EV);
+		this._unbind(END_EV);
+		this._unbind(CANCEL_EV);
+	},
+	
+	enable: function () {
+		this.enabled = true;
+	},
+	
+	stop: function () {
+		cancelFrame(this.aniTime);
+		this.steps = [];
+		this.moved = false;
+		this.animating = false;
+	}
+};
+
+if (typeof exports !== 'undefined') exports.iScroll = iScroll;
+else window.iScroll = iScroll;
+
+})();