_move: function()

in harness/app-assets/templates/assets/js/components/iscroll.js [429:524]
76 lines of code
36 McCabe index (conditional complexity)

	_move: function (e) {
		if ( !this.enabled || utils.eventType[e.type] !== this.initiated ) {
			return;
		}

		if ( this.options.preventDefault ) {	// increases performance on Android? TODO: check!
			e.preventDefault();
		}

		var point		= e.touches ? e.touches[0] : e,
			deltaX		= point.pageX - this.pointX,
			deltaY		= point.pageY - this.pointY,
			timestamp	= utils.getTime(),
			newX, newY,
			absDistX, absDistY;

		this.pointX		= point.pageX;
		this.pointY		= point.pageY;

		this.distX		+= deltaX;
		this.distY		+= deltaY;
		absDistX		= Math.abs(this.distX);
		absDistY		= Math.abs(this.distY);

		// We need to move at least 10 pixels for the scrolling to initiate
		if ( timestamp - this.endTime > 300 && (absDistX < 10 && absDistY < 10) ) {
			return;
		}

		// If you are scrolling in one direction lock the other
		if ( !this.directionLocked && !this.options.freeScroll ) {
			if ( absDistX > absDistY + this.options.directionLockThreshold ) {
				this.directionLocked = 'h';		// lock horizontally
			} else if ( absDistY >= absDistX + this.options.directionLockThreshold ) {
				this.directionLocked = 'v';		// lock vertically
			} else {
				this.directionLocked = 'n';		// no lock
			}
		}

		if ( this.directionLocked == 'h' ) {
			if ( this.options.eventPassthrough == 'vertical' ) {
				e.preventDefault();
			} else if ( this.options.eventPassthrough == 'horizontal' ) {
				this.initiated = false;
				return;
			}

			deltaY = 0;
		} else if ( this.directionLocked == 'v' ) {
			if ( this.options.eventPassthrough == 'horizontal' ) {
				e.preventDefault();
			} else if ( this.options.eventPassthrough == 'vertical' ) {
				this.initiated = false;
				return;
			}

			deltaX = 0;
		}

		deltaX = this.hasHorizontalScroll ? deltaX : 0;
		deltaY = this.hasVerticalScroll ? deltaY : 0;

		newX = this.x + deltaX;
		newY = this.y + deltaY;

		// Slow down if outside of the boundaries
		if ( newX > 0 || newX < this.maxScrollX ) {
			newX = this.options.bounce ? this.x + deltaX / 3 : newX > 0 ? 0 : this.maxScrollX;
		}
		if ( newY > 0 || newY < this.maxScrollY ) {
			newY = this.options.bounce ? this.y + deltaY / 3 : newY > 0 ? 0 : this.maxScrollY;
		}

		this.directionX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
		this.directionY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;

		if ( !this.moved ) {
			this._execEvent('scrollStart');
		}

		this.moved = true;

		this._translate(newX, newY);

/* REPLACE START: _move */

		if ( timestamp - this.startTime > 300 ) {
			this.startTime = timestamp;
			this.startX = this.x;
			this.startY = this.y;
		}

/* REPLACE END: _move */

	},