Function expandNode

src/controller.js:48–78

* Expand node * @param {Element|jQuery} elem Node to expand * @param {Boolean} is_recursive Recursively expand all child nodes

(elem, is_recursive)

	 * @param {Boolean} is_recursive Recursively expand all child nodes
	 */
	function expandNode(elem, is_recursive) {
		if (!xv_dom.hasClass(elem, 'xv-collapsed')) // additional check for recursive calls
			return;
		
		// check if current node has unprocessed children
		xv_dom.removeClass(elem, 'xv-collapsed');
		if (hasUnprocessedChildren(elem)) {
			// render all first-level child nodes
			var orig_elem = xv_renderer.getOriginalNode(elem),
				/** @type {Element} */
				cur_child = _.detect(elem.childNodes, function(n) {
					return n.nodeType == 1 && xv_dom.hasClass(n, 'xv-tag-children');
				});
				
			var f = document.createDocumentFragment();
			_.each(orig_elem.childNodes, function(n) {
				var r = xv_renderer.render(n, 0);
				if (r) f.appendChild(r);
			});
			
			xv_dom.empty(cur_child);
			cur_child.appendChild(f);
			xv_dom.removeClass(elem, 'xv-has-unprocessed');
		}
		
		if (is_recursive) {
			_.each(xv_dom.getByClass('xv-collapsed', elem), function(n) {
				expandNode(n, is_recursive);
			});
		}
	}
	
	/**
	 * Collapse expanded node