function getCaretRect(rng) {
				var rects, textNode, node, container = rng.startContainer;

				rects = rng.getClientRects();
				if (rects.length) {
					return rects[0];
				}

				if (!rng.collapsed || container.nodeType != 1) {
					return;
				}

				node = container.childNodes[lastRng.startOffset];

				// Skip empty whitespace nodes
				while (node && node.nodeType == 3 && !node.data.length) {
					node = node.nextSibling;
				}

				if (!node) {
					return;
				}

				// Check if the location is |<br>
				// TODO: Might need to expand this to say |<table>
				if (node.tagName == 'BR') {
					textNode = dom.doc.createTextNode('\uFEFF');
					node.parentNode.insertBefore(textNode, node);

					rng = dom.createRng();
					rng.setStartBefore(textNode);
					rng.setEndAfter(textNode);

					rects = rng.getClientRects();
					dom.remove(textNode);
				}

				if (rects.length) {
					return rects[0];
				}
			}
Returns the rect of the current caret if the caret is in an empty block before a
BR we insert a temporary invisible character that we get the rect this way we always get a proper rect.

TODO: This might be useful in core.