Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,64 @@
+//------------------------------------------------------------------------------
+// <copyright file="BeginEvent.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;
+
+    internal class BeginEvent : Event {
+        private XPathNodeType nodeType;
+        private string        namespaceUri;
+        private string        name;
+        private string        prefix;
+        private bool          empty;
+        private object        htmlProps;
+#if DEBUG
+        private bool          replaceNSAliasesDone;
+#endif
+        
+        public BeginEvent(Compiler compiler) {
+            NavigatorInput input = compiler.Input;
+            Debug.Assert(input != null);
+            Debug.Assert(input.NodeType != XPathNodeType.Namespace);
+            this.nodeType     = input.NodeType;
+            this.namespaceUri = input.NamespaceURI;
+            this.name         = input.LocalName;
+            this.prefix       = input.Prefix;
+            this.empty        = input.IsEmptyTag;
+            if (nodeType ==  XPathNodeType.Element) {
+                this.htmlProps = HtmlElementProps.GetProps(this.name);
+            }
+            else if (nodeType ==  XPathNodeType.Attribute) {
+                this.htmlProps = HtmlAttributeProps.GetProps(this.name);
+            }
+        }
+
+        public override void ReplaceNamespaceAlias(Compiler compiler){
+#if DEBUG
+            Debug.Assert(! replaceNSAliasesDone, "Second attempt to replace NS aliases!. This bad.");
+            replaceNSAliasesDone = true;
+#endif
+            if (this.nodeType == XPathNodeType.Attribute && this.namespaceUri.Length == 0) {
+                return ; // '#default' aren't apply to attributes.
+            }
+            NamespaceInfo ResultURIInfo = compiler.FindNamespaceAlias(this.namespaceUri);
+            if (ResultURIInfo != null) {
+                this.namespaceUri = ResultURIInfo.nameSpace;
+                if (ResultURIInfo.prefix != null) {
+                    this.prefix = ResultURIInfo.prefix; 
+                }
+            }
+        }
+        
+        public override bool Output(Processor processor, ActionFrame frame) {
+            return processor.BeginEvent(this.nodeType, this.prefix, this.name, this.namespaceUri, this.empty, this.htmlProps, false);
+        }
+    }
+}