function magnify()

in plugin/zoom-js/zoom.js [90:160]
57 lines of code
8 McCabe index (conditional complexity)

	function magnify( rect, scale ) {

		var scrollOffset = getScrollOffset();

		// Ensure a width/height is set
		rect.width = rect.width || 1;
		rect.height = rect.height || 1;

		// Center the rect within the zoomed viewport
		rect.x -= ( window.innerWidth - ( rect.width * scale ) ) / 2;
		rect.y -= ( window.innerHeight - ( rect.height * scale ) ) / 2;

		if( supportsTransforms ) {
			// Reset
			if( scale === 1 ) {
				document.body.style.transform = '';
				document.body.style.OTransform = '';
				document.body.style.msTransform = '';
				document.body.style.MozTransform = '';
				document.body.style.WebkitTransform = '';
			}
			// Scale
			else {
				var origin = scrollOffset.x +'px '+ scrollOffset.y +'px',
					transform = 'translate('+ -rect.x +'px,'+ -rect.y +'px) scale('+ scale +')';

				document.body.style.transformOrigin = origin;
				document.body.style.OTransformOrigin = origin;
				document.body.style.msTransformOrigin = origin;
				document.body.style.MozTransformOrigin = origin;
				document.body.style.WebkitTransformOrigin = origin;

				document.body.style.transform = transform;
				document.body.style.OTransform = transform;
				document.body.style.msTransform = transform;
				document.body.style.MozTransform = transform;
				document.body.style.WebkitTransform = transform;
			}
		}
		else {
			// Reset
			if( scale === 1 ) {
				document.body.style.position = '';
				document.body.style.left = '';
				document.body.style.top = '';
				document.body.style.width = '';
				document.body.style.height = '';
				document.body.style.zoom = '';
			}
			// Scale
			else {
				document.body.style.position = 'relative';
				document.body.style.left = ( - ( scrollOffset.x + rect.x ) / scale ) + 'px';
				document.body.style.top = ( - ( scrollOffset.y + rect.y ) / scale ) + 'px';
				document.body.style.width = ( scale * 100 ) + '%';
				document.body.style.height = ( scale * 100 ) + '%';
				document.body.style.zoom = scale;
			}
		}

		level = scale;

		if( document.documentElement.classList ) {
			if( level !== 1 ) {
				document.documentElement.classList.add( 'zoomed' );
			}
			else {
				document.documentElement.classList.remove( 'zoomed' );
			}
		}
	}