_listItemInserted: function()

in Canvas/CanvasSimple/lib/winjs-4.0.1/js/base.js [25098:25156]
52 lines of code
6 McCabe index (conditional complexity)

                _listItemInserted: function (event) {
                    // iteminserted is only interesting if this is a new group, or is the first
                    //  item of the group at which point the group data is regenerated. It will
                    //  however always result in a +1 to all the following firstItemIndexHints
                    //
                    var key = event.detail.key;
                    var index = event.detail.index;
                    var value = event.detail.value;
                    var list = this._list;
                    var groupKey = list.getItemFromKey(key).groupKey;
                    var groupItems = this._groupItems;
                    var groupKeys = this._groupKeys;
                    var groupItem = groupItems[groupKey];
                    var groupIndex;
                    var oldGroupItem, newGroupItem;

                    var i, len;
                    if (!groupItem) {
                        // we have a new group, add it
                        for (i = 0, len = groupKeys.length; i < len; i++) {
                            groupItem = groupItems[groupKeys[i]];
                            if (groupItem.firstItemIndexHint >= index) {
                                break;
                            }
                        }
                        groupIndex = i;
                        groupItem = {
                            handle: groupKey,
                            key: groupKey,
                            data: this._groupDataOf(value),
                            groupSize: 1,
                            firstItemKey: key,
                            firstItemIndexHint: index
                        };
                        groupKeys.splice(groupIndex, 0, groupKey);
                        groupItems[groupKey] = groupItem;
                        this._notifyItemInserted(groupKey, groupIndex, groupItem.data);
                    } else {
                        oldGroupItem = groupItem;
                        newGroupItem = cloneItem(oldGroupItem);
                        newGroupItem.groupSize++;
                        if (oldGroupItem.firstItemIndexHint === index) {
                            newGroupItem.groupData = this._groupDataOf(value);
                            newGroupItem.firstItemKey = key;
                            newGroupItem.firstItemIndexHint = index;
                        }
                        groupItems[groupKey] = newGroupItem;
                        groupIndex = groupKeys.indexOf(groupKey);
                        this._notifyItemChanged(groupKey, groupIndex, oldGroupItem.data, newGroupItem.data, oldGroupItem, newGroupItem);
                    }
                    // update the firstItemIndexHint on following groups
                    for (i = groupIndex + 1, len = groupKeys.length; i < len; i++) {
                        oldGroupItem = groupItems[groupKeys[i]];
                        newGroupItem = cloneItem(oldGroupItem);
                        newGroupItem.firstItemIndexHint++;
                        groupItems[newGroupItem.key] = newGroupItem;
                        this._notifyItemChanged(newGroupItem.key, i, oldGroupItem.data, newGroupItem.data, oldGroupItem, newGroupItem);
                    }
                },