Slick.prototype.swipeMove = function()

in content/versions/1.11.0/js/slick/1.5.0/slick.js [2098:2170]
53 lines of code
25 McCabe index (conditional complexity)

    Slick.prototype.swipeMove = function(event) {

        var _ = this,
            edgeWasHit = false,
            curLeft, swipeDirection, swipeLength, positionOffset, touches;

        touches = event.originalEvent !== undefined ? event.originalEvent.touches : null;

        if (!_.dragging || touches && touches.length !== 1) {
            return false;
        }

        curLeft = _.getLeft(_.currentSlide);

        _.touchObject.curX = touches !== undefined ? touches[0].pageX : event.clientX;
        _.touchObject.curY = touches !== undefined ? touches[0].pageY : event.clientY;

        _.touchObject.swipeLength = Math.round(Math.sqrt(
            Math.pow(_.touchObject.curX - _.touchObject.startX, 2)));

        if (_.options.verticalSwiping === true) {
            _.touchObject.swipeLength = Math.round(Math.sqrt(
                Math.pow(_.touchObject.curY - _.touchObject.startY, 2)));
        }

        swipeDirection = _.swipeDirection();

        if (swipeDirection === 'vertical') {
            return;
        }

        if (event.originalEvent !== undefined && _.touchObject.swipeLength > 4) {
            event.preventDefault();
        }

        positionOffset = (_.options.rtl === false ? 1 : -1) * (_.touchObject.curX > _.touchObject.startX ? 1 : -1);
        if (_.options.verticalSwiping === true) {
            positionOffset = _.touchObject.curY > _.touchObject.startY ? 1 : -1;
        }


        swipeLength = _.touchObject.swipeLength;

        _.touchObject.edgeHit = false;

        if (_.options.infinite === false) {
            if ((_.currentSlide === 0 && swipeDirection === "right") || (_.currentSlide >= _.getDotCount() && swipeDirection === "left")) {
                swipeLength = _.touchObject.swipeLength * _.options.edgeFriction;
                _.touchObject.edgeHit = true;
            }
        }

        if (_.options.vertical === false) {
            _.swipeLeft = curLeft + swipeLength * positionOffset;
        } else {
            _.swipeLeft = curLeft + (swipeLength * (_.$list.height() / _.listWidth)) * positionOffset;
        }
        if (_.options.verticalSwiping === true) {
            _.swipeLeft = curLeft + swipeLength * positionOffset;
        }

        if (_.options.fade === true || _.options.touchMove === false) {
            return false;
        }

        if (_.animating === true) {
            _.swipeLeft = null;
            return false;
        }

        _.setCSS(_.swipeLeft);

    };