Converts selected stage elements to library items, including naming and selecting them in the library. Supports shape objects with multiple members.

Convert Selected Elements to Library Items.jsfl

/**
 * Convert selected elements to library items
 * @author Dave Stewart
 * @url www.xjsfl.com
 */ 

// variables
	var dom = document, timeline, element, names = [], name;
	
// create a new movieclip in which to do our conversion
	dom.convertToSymbol('graphic', '__temp__', 'center');
	dom.enterEditMode('inPlace');
	dom.distributeToLayers();
	timeline = document.getTimeline();
	
// loop through the layers, converting elements and propting for names
	for (var i = 0; i < timeline.layers.length; i++)
	{
		element = timeline.layers[i].frames[0].elements[0];
		if(element)
		{
			dom.selectNone();
			dom.selection = [element];
			name = prompt('Name this object, or Cancel to skip', 'Symbol ' + (names.length + 1));
			if(name)
			{
				names.push(name)
				dom.convertToSymbol('movie clip', name, 'center');
			}
		}
	}
	
// return to the parent timeline
	dom.exitEditMode();
	dom.breakApart();
	dom.library.deleteItem('__temp__');
	
// name elements after their library items, and select items in library
	dom.library.selectNone();
	for each(element in dom.selection)
	{
		if(element.elementType == 'instance')
		{
			name = element.libraryItem.name;
			dom.library.selectItem(name, false);
			element.name = name.replace(/ /g, '_').toLowerCase();
		}
	}