Function dragZoom

scripts/reading.js:2627–2666

(x, y, animation = false)

// Drag zoom
function dragZoom(x, y, animation = false)
{
	const transition = app.scrollTransition('dragZoom', animation ? _config.readingViewSpeed : 0);
	const withLimits = notCrossZoomLimits(scalePrevData.tranX2 + x, scalePrevData.tranY2 + y);

	const diff = {
		x: (scalePrevData.tranX2 + x) - withLimits.x,
		y: (scalePrevData.tranY2 + y) - withLimits.y,
	};

	x = withLimits.x;
	y = withLimits.y;

	const contentRight = template._contentRight();

	if(config.readingGlobalZoom && readingViewIs('scroll'))
	{
		scalePrevData.tranX = zoomMoveData.tranX = x;
		zoomMoveData.tranY = scalePrevData.tranY;

		dom.this(contentRight).find('.reading-body > div').css({
			transition: 'transform '+transition.speed+'s '+transition.function+', z-index 0s',
			transform: 'translateX('+app.roundDPR(x)+'px) translateY('+app.roundDPR(scalePrevData.tranY)+'px) scale('+scalePrevData.scale+')',
			transformOrigin: 'top center',
		});
	}
	else
	{
		zoomMoveData.tranX = x;
		zoomMoveData.tranY = y;

		dom.this(contentRight).find('.image-position'+currentZoomIndex, true).css({
			transition: 'transform '+transition.speed+'s '+transition.function+', z-index 0s',
			transform: 'translateX('+app.roundDPR(x)+'px) translateY('+app.roundDPR(y)+'px) scale('+scalePrevData.scale+')',
			transformOrigin: 'center center',
		});
	}

	return diff;
}

function dragZoomEnd(force = false)
{