Group.prototype.addItems.jsx

Group.prototype.addItems = function(/*PageItem[]*/newItems)
//----------------------------
// Emulates Group.groups.add(items)
// [ Also supports Group.addItems(existing_item) ]
// <newItems> == Array of 2+ PageItem
//   -> create a <newItems> subgroup in <this>
// <newItems> == single PageItem
//   -> add the PageItem in <this>
// Returns the added subgroup or item
// (the whole group hierarchy is preserved)
// Note - this method fails if <this> is
//        anchored/embedded in a story
{
    var nodes=[], gs=[], g=this, node;

    var makeNode = function(id,g)
    {
        var elems = g.pageItems.everyItem().getElements();
        if (id === null) // placeholder for newItems
            return {index: elems.length, items:elems.concat(0)};
        for(var i=elems.length-1 ; i>=0 ; i--)
            // need to find the actual index in the group
            if (elems[i].id == id) break;
        return {index: i, items:elems};
    };
     
    var id=null;
    for( ; g.constructor == Group ; id=g.id, g=g.parent )
    {
        gs.push(g.getElements()[0]);
        nodes.push(makeNode(id,g));
    }
     
    var add = (function()
    {
        var host = g;
        return function(items)
        {
            return host.groups.add(items);
        };
    })();
     
    var r = ( 'array' == typeof newItems ) ?
        add(newItems) :
        newItems;

    while( g=gs.pop() ) g.ungroup();
     
    for( g=r ; node=nodes.shift() ; )
    {
        node.items[node.index] = g;
        g = add(node.items);
    }

    return r;
};