function addRootBlocks() {
				var node = rootNode.firstChild, next, rootBlockNode;

				// Removes whitespace at beginning and end of block so:
				// <p> x </p> -> <p>x</p>
				function trim(rootBlockNode) {
					if (rootBlockNode) {
						node = rootBlockNode.firstChild;
						if (node && node.type == 3) {
							node.value = node.value.replace(startWhiteSpaceRegExp, '');
						}

						node = rootBlockNode.lastChild;
						if (node && node.type == 3) {
							node.value = node.value.replace(endWhiteSpaceRegExp, '');
						}
					}
				}

				// Check if rootBlock is valid within rootNode for example if P is valid in H1 if H1 is the contentEditabe root
				if (!schema.isValidChild(rootNode.name, rootBlockName.toLowerCase())) {
					return;
				}

				while (node) {
					next = node.next;

					if (node.type == 3 || (node.type == 1 && node.name !== 'p' &&
						!blockElements[node.name] && !node.attr('data-mce-type'))) {
						if (!rootBlockNode) {
							// Create a new root block element
							rootBlockNode = createNode(rootBlockName, 1);
							rootBlockNode.attr(settings.forced_root_block_attrs);
							rootNode.insert(rootBlockNode, node);
							rootBlockNode.append(node);
						} else {
							rootBlockNode.append(node);
						}
					} else {
						trim(rootBlockNode);
						rootBlockNode = null;
					}

					node = next;
				}

				trim(rootBlockNode);
			}
Parses the specified HTML string into a DOM like node tree and returns the result.

@example
var rootNode = new DomParser({...}).parse('<b>text</b>');
@method parse
@param {String} html Html string to sax parse.
@param {Object} args Optional args object that gets passed to all filter functions.
@return {tinymce.html.Node} Root node containing the tree.