System.Xml.Xsl.XsltOld.ApplyTemplatesAction.Execute C# (CSharp) Method

        internal override void Execute(Processor processor, ActionFrame frame) {
            Debug.Assert(processor != null && frame != null);

            switch (frame.State) {
            case Initialized:
		        processor.ResetParams();
		        processor.InitSortArray();
                if (this.containedActions != null && this.containedActions.Count > 0) {
                    processor.PushActionFrame(frame);
                    frame.State = ProcessedChildren;
                    break;
                }
                goto case ProcessedChildren;
	        case ProcessedChildren:
                if (this.selectKey == Compiler.InvalidQueryKey) {
                    if (! frame.Node.HasChildren) {
                        frame.Finished();
                        break;
                    }
                    frame.InitNewNodeSet(frame.Node.SelectChildren(XPathNodeType.All));
                }
                else {
                    frame.InitNewNodeSet(processor.StartQuery(frame.NodeSet, this.selectKey));
                }
                if (processor.SortArray.Count != 0) {
                    frame.SortNewNodeSet(processor, processor.SortArray);
                }
                frame.State = ProcessNextNode;
                goto case ProcessNextNode;

            case ProcessNextNode:
                Debug.Assert(frame.State == ProcessNextNode);
                Debug.Assert(frame.NewNodeSet != null);

                if (frame.NewNextNode(processor)) {
                    frame.State = PositionAdvanced;
                    goto case PositionAdvanced;
                }
                else {
                    frame.Finished();
                    break;
                }

            case PositionAdvanced:
                Debug.Assert(frame.State == PositionAdvanced);

                processor.PushTemplateLookup(frame.NewNodeSet, this.mode, /*importsOf:*/null);

                frame.State = TemplateProcessed;
                break;

            case TemplateProcessed:
                frame.State = ProcessNextNode;
                goto case ProcessNextNode;

            default:
                Debug.Fail("Invalid ApplyTemplatesAction execution state");
                break;
            }
        }
    }