Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,116 @@
+//------------------------------------------------------------------------------
+// <copyright file="CopyAction.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+// <owner current="true" primary="true">[....]</owner>
+//------------------------------------------------------------------------------
+
+namespace System.Xml.Xsl.XsltOld {
+    using Res = System.Xml.Utils.Res;
+    using System;
+    using System.Diagnostics;
+    using System.Xml;
+    using System.Xml.XPath;
+    using MS.Internal.Xml.XPath;
+
+    internal class CopyAction : ContainerAction {
+        // Local execution states
+        private const int CopyText          = 4;
+        private const int NamespaceCopy     = 5;
+
+        private const int ContentsCopy      = 6;
+        private const int ProcessChildren   = 7;
+        private const int ChildrenOnly      = 8;
+
+        private string useAttributeSets;
+        private bool   empty;
+
+        internal override void Compile(Compiler compiler) {
+            CompileAttributes(compiler);
+
+            if (compiler.Recurse()) {
+                CompileTemplate(compiler);
+                compiler.ToParent();
+            }
+            if (this.containedActions == null)
+                this.empty = true;
+                
+        }
+
+        internal override bool CompileAttribute(Compiler compiler) {
+            string name   = compiler.Input.LocalName;
+            string value  = compiler.Input.Value;
+            if (Ref.Equal(name, compiler.Atoms.UseAttributeSets)) {
+                this.useAttributeSets = value;
+                AddAction(compiler.CreateUseAttributeSetsAction());
+            }
+            else {
+                return false;
+            }
+            return true;
+        }
+
+        internal override void Execute(Processor processor, ActionFrame frame) {
+            Debug.Assert(processor != null && frame != null);
+
+            while (processor.CanContinue) {
+                switch (frame.State) {
+                case Initialized:
+                    if (Processor.IsRoot(frame.Node)) {
+                        processor.PushActionFrame(frame);
+                        frame.State = ChildrenOnly;
+                        break;
+                    }
+
+                    if (processor.CopyBeginEvent(frame.Node, this.empty) == false) {
+                        // This event wasn't processed
+                        break;
+                    }
+                    frame.State = NamespaceCopy;
+                 
+                    continue;
+                case NamespaceCopy:
+                    frame.State = ContentsCopy;
+                    if ( frame.Node.NodeType == XPathNodeType.Element ) {
+                        processor.PushActionFrame(CopyNamespacesAction.GetAction(), frame.NodeSet);
+                        break;
+                    }
+                    continue;
+                case ContentsCopy:
+                    if (frame.Node.NodeType == XPathNodeType.Element && !this.empty) {
+                        //Debug.Assert(frame.Node.HasValue == false);
+                        processor.PushActionFrame(frame);
+                        frame.State = ProcessChildren;
+                        break;
+                    }
+                    else {
+                        if (processor.CopyTextEvent(frame.Node)) {
+                            frame.State = ProcessChildren;
+                            continue;
+                        }
+                        else {
+                            // This event wasn't processed
+                            break;
+                        }
+                    }
+
+                case ProcessChildren:
+                    if (processor.CopyEndEvent(frame.Node)) {
+                        frame.Finished();
+                    }
+                    break;
+
+                case ChildrenOnly:
+                    frame.Finished();
+                    break;
+
+                default:
+                    Debug.Fail("Invalid CopyAction execution state");
+			        break;
+                }
+
+                break;
+            }
+        }
+    }
+}