/*
 * Unofficial jQuery swipe support for iOS, Android
 * (Not tested on other platforms)
 */

(function($) {
	$.fn.swipe = function(options) {
	    // Default thresholds & swipe functions
	    var defaults = {
	        threshold: {
	            x: 35,
	            y: 10
	        },
	        swipeLeft: function() { },
	        swipeRight: function() { },
	        preventDefaultEvents: false
	    };

	    var options = $.extend(defaults, options);

	    if (!this) return false;

	    return this.each(function() {

	        var me = $(this)

	        // Private variables for each element
	        var originalCoord = { x: 0, y: 0 }
	        var finalCoord = { x: 0, y: 0 }

	        // Screen touched, store the original coordinate
	        function touchStart(event) {
	            originalCoord.x = event.targetTouches[0].pageX
	            originalCoord.y = event.targetTouches[0].pageY
	        }

	        // Store coordinates as finger is swiping
	        function touchMove(event) {
	            if (defaults.preventDefaultEvents)
	                event.preventDefault();
	            finalCoord.x = event.targetTouches[0].pageX // Updated X,Y coordinates
	            finalCoord.y = event.targetTouches[0].pageY
	        }

	        // Swipe should only be on X axis, ignore if swipe on Y axis
	        // Calculate if the swipe was left or right
	        function touchEnd(event) {
	            var changeY = originalCoord.y - finalCoord.y
	            if(changeY < defaults.threshold.y && changeY > (defaults.threshold.y*-1)) {
	                changeX = originalCoord.x - finalCoord.x

	                if(changeX > defaults.threshold.x) {
	                    defaults.swipeLeft()
	                }
	                if(changeX < (defaults.threshold.x*-1)) {
	                    defaults.swipeRight()
	                }
	            }
	        }

	        // Swipe was canceled
	        function touchCancel(event) { 

	        }

	        // Add gestures to all swipable areas
	        this.addEventListener("touchstart", touchStart, false);
	        this.addEventListener("touchmove", touchMove, false);
	        this.addEventListener("touchend", touchEnd, false);
	        this.addEventListener("touchcancel", touchCancel, false);

	    });
	};
})(jQuery);