mcs/class/referencesource/System.Data.SqlXml/System/Xml/Xsl/XsltOld/CopyCodeAction.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="CopyCodeAction.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">Microsoft</owner>
   6 //------------------------------------------------------------------------------
   7
   8 namespace System.Xml.Xsl.XsltOld {
   9     using Res = System.Xml.Utils.Res;
  10     using System;
  11     using System.Diagnostics;
  12     using System.Xml;
  13     using System.Xml.XPath;
  14     using System.Collections;
  15
  16     internal class CopyCodeAction : Action {
  17         // Execution states:
  18         private const int Outputting = 2;
  19
  20         private ArrayList copyEvents;   // Copy code action events
  21
  22         internal CopyCodeAction() {
  23             this.copyEvents = new ArrayList();
  24         }
  25
  26         internal void AddEvent(Event copyEvent) {
  27             this.copyEvents.Add(copyEvent);
  28         }
  29
  30         internal void AddEvents(ArrayList copyEvents) {
  31             Debug.Assert(copyEvents != null);
  32             this.copyEvents.AddRange(copyEvents);
  33         }
  34
  35         internal override void ReplaceNamespaceAlias(Compiler compiler) {
  36             int count = this.copyEvents.Count;
  37             for(int i = 0; i< count; i++) {
  38                 ((Event) this.copyEvents[i]).ReplaceNamespaceAlias(compiler);
  39             }
  40         }
  41
  42         internal override void Execute(Processor processor, ActionFrame frame) {
  43             Debug.Assert(processor != null && frame != null);
  44             Debug.Assert(this.copyEvents != null && this.copyEvents.Count > 0);
  45
  46             switch (frame.State) {
  47             case Initialized:
  48                 frame.Counter = 0;
  49                 frame.State   = Outputting;
  50                 goto case Outputting;
  51
  52             case Outputting:
  53                 Debug.Assert(frame.State == Outputting);
  54
  55                 while (processor.CanContinue) {
  56                     Debug.Assert(frame.Counter < this.copyEvents.Count);
  57                     Event copyEvent = (Event) this.copyEvents[frame.Counter];
  58
  59                     if (copyEvent.Output(processor, frame) == false) {
  60                         // This event wasn't processed
  61                         break;
  62                     }
  63
  64                     if (frame.IncrementCounter() >= this.copyEvents.Count) {
  65                         frame.Finished();
  66                         break;
  67                     }
  68                 }
  69                 break;
  70             default:
  71                 Debug.Fail("Invalid CopyCodeAction execution state");
  72                 break;
  73             }
  74         }
  75
  76         internal override DbgData GetDbgData(ActionFrame frame) {
  77             Debug.Assert(frame.Counter < this.copyEvents.Count);
  78             return ((Event)this.copyEvents[frame.Counter]).DbgData;
  79         }
  80     }
  81 }