Function onScroll

scripts/reading.js:1652–1756

(event)

}

function onScroll(event)
{
	if(!isLoaded || !onReading) return;

	if(activeOnScroll && readingViewIs('scroll'))
	{
		let scrollTop = this.scrollTop;

		let center = 0;

		let availableScroll = rightSize.scrollHeight - rightSize.height;
		let centerOffset = (availableScroll < rightSize.height ? availableScroll : rightSize.height) / 2;

		if(scrollTop < centerOffset)
			center = scrollTop + (centerOffset * (scrollTop / centerOffset));
		else if(scrollTop + centerOffset > availableScroll)
			center = scrollTop + centerOffset + (centerOffset * (1 - (availableScroll - scrollTop) / centerOffset));
		else
			center = scrollTop + centerOffset;

		let selIndex = false;
		let closest = false;

		toBreak:
		for(let key1 in imagesFullPosition)
		{
			for(let key2 in imagesFullPosition[key1])
			{
				let position = imagesFullPosition[key1][key2];

				if(position.top < center && position.bottom > center)
				{
					selIndex = +key1;
					break toBreak;
				}
				else
				{
					let diff = Math.abs(position.center - center);

					if(closest === false || diff < closest.diff)
					{
						selIndex = +key1;
						closest = {center: position.center, diff: diff};
					}
				}
			}
		}

		let imgHeight = imagesFullPosition[selIndex][0].bottom - imagesFullPosition[selIndex][0].top + (readingMargin().top * 2);

		let pageVisibility = Math.floor(imgHeight / rightSize.height);

		maxPageVisibility = pageVisibility;

		let contentHeightRes = pageVisibility > 0 ? ((rightSize.height * pageVisibility) - imgHeight) / pageVisibility : 0;

		scrollPart = ((rightSize.height - contentHeightRes) - rightSize.height / pageVisibility);