Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,183 @@
+//------------------------------------------------------------------------------
+// <copyright file="ApplyTemplatesAction.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.Collections;
+    using System.Xml;
+    using System.Xml.XPath;
+
+    internal class ApplyTemplatesAction : ContainerAction {
+        private const int    ProcessedChildren = 2;
+        private const int    ProcessNextNode   = 3;
+        private const int    PositionAdvanced  = 4;
+        private const int    TemplateProcessed = 5;
+
+        private int                selectKey  = Compiler.InvalidQueryKey;
+        private XmlQualifiedName   mode;
+
+        //
+        //  <xsl:template match="*|/" [mode="?"]>
+        //    <xsl:apply-templates [mode="?"]/>
+        //  </xsl:template>
+        //
+
+        private static ApplyTemplatesAction s_BuiltInRule = new ApplyTemplatesAction();
+
+        internal static ApplyTemplatesAction BuiltInRule() {
+            Debug.Assert(s_BuiltInRule != null);
+            return s_BuiltInRule;
+        }
+
+        internal static ApplyTemplatesAction BuiltInRule(XmlQualifiedName mode) {
+            return(mode == null || mode.IsEmpty) ? BuiltInRule() : new ApplyTemplatesAction(mode);
+        }
+
+        internal ApplyTemplatesAction() {}
+
+        private ApplyTemplatesAction(XmlQualifiedName mode) {
+            Debug.Assert(mode != null);
+            this.mode = mode;
+        }
+
+        internal override void Compile(Compiler compiler) {
+            CompileAttributes(compiler);
+            CompileContent(compiler);
+        }
+
+        internal override bool CompileAttribute(Compiler compiler) {
+            string name   = compiler.Input.LocalName;
+            string value  = compiler.Input.Value;
+            if (Ref.Equal(name, compiler.Atoms.Select )) {
+                this.selectKey = compiler.AddQuery(value);
+            }
+            else if (Ref.Equal(name, compiler.Atoms.Mode )) {
+                Debug.Assert(this.mode == null);
+                if (compiler.AllowBuiltInMode && value == "*") {
+                    this.mode = Compiler.BuiltInMode;
+                }
+                else {
+                    this.mode = compiler.CreateXPathQName(value);
+                }
+            }
+            else {
+                return false;
+            }
+
+            return true;
+        }
+
+        private void CompileContent(Compiler compiler) {
+            NavigatorInput input = compiler.Input;
+
+            if (compiler.Recurse()) {
+                do {
+                    switch (input.NodeType) {
+                    case XPathNodeType.Element:
+                        compiler.PushNamespaceScope();
+                        string nspace = input.NamespaceURI;
+                        string name   = input.LocalName;
+
+                        if (Ref.Equal(nspace, input.Atoms.UriXsl)) {
+                            if (Ref.Equal(name, input.Atoms.Sort)) {
+                                AddAction(compiler.CreateSortAction());
+                            }
+                            else if (Ref.Equal(name, input.Atoms.WithParam)) {
+                                WithParamAction par = compiler.CreateWithParamAction();
+                                CheckDuplicateParams(par.Name);
+                                AddAction(par);
+                            }
+                            else {
+                                throw compiler.UnexpectedKeyword();
+                            }
+                        }
+                        else {
+                            throw compiler.UnexpectedKeyword();
+                        }
+                        compiler.PopScope();
+                        break;
+
+                    case XPathNodeType.Comment:
+                    case XPathNodeType.ProcessingInstruction:
+                    case XPathNodeType.Whitespace:
+                    case XPathNodeType.SignificantWhitespace:
+                        break;
+
+                    default:
+                        throw XsltException.Create(Res.Xslt_InvalidContents, "apply-templates");
+                    }
+                }
+                while (compiler.Advance());
+
+                compiler.ToParent();
+            }
+        }       
+        
+        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;
+            }
+        }
+    }
+}