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//------------------------------------------------------------------------------
// <copyright file="InputScopeManager.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</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 InputScopeManager {
private InputScope scopeStack;
private string defaultNS = string.Empty;
private XPathNavigator navigator; // We need this nsvigator for document() function implementation
public InputScopeManager(XPathNavigator navigator, InputScope rootScope) {
this.navigator = navigator;
this.scopeStack = rootScope;
}
internal InputScope CurrentScope {
get { return this.scopeStack; }
}
internal InputScope VariableScope {
get {
Debug.Assert(this.scopeStack != null);
Debug.Assert(this.scopeStack.Parent != null);
return this.scopeStack.Parent;
}
}
internal InputScopeManager Clone() {
InputScopeManager manager = new InputScopeManager(this.navigator, null);
manager.scopeStack = this.scopeStack;
manager.defaultNS = this.defaultNS;
return manager;
}
public XPathNavigator Navigator {
get {return this.navigator;}
}
internal InputScope PushScope() {
this.scopeStack = new InputScope(this.scopeStack);
return this.scopeStack;
}
internal void PopScope() {
Debug.Assert(this.scopeStack != null, "Push/Pop disbalance");
if (this.scopeStack == null) {
return;
}
for (NamespaceDecl scope = this.scopeStack.Scopes; scope != null; scope = scope.Next) {
this.defaultNS = scope.PrevDefaultNsUri;
}
this.scopeStack = this.scopeStack.Parent;
}
internal void PushNamespace(string prefix, string nspace) {
Debug.Assert(this.scopeStack != null, "PushScope wasn't called");
Debug.Assert(prefix != null);
Debug.Assert(nspace != null);
this.scopeStack.AddNamespace(prefix, nspace, this.defaultNS);
if (prefix == null || prefix.Length == 0) {
this.defaultNS = nspace;
}
}
// CompileContext
public string DefaultNamespace {
get { return this.defaultNS; }
}
private string ResolveNonEmptyPrefix(string prefix) {
Debug.Assert(this.scopeStack != null, "PushScope wasn't called");
Debug.Assert(!string.IsNullOrEmpty(prefix));
if (prefix == "xml") {
return XmlReservedNs.NsXml;
}
else if (prefix == "xmlns") {
return XmlReservedNs.NsXmlNs;
}
for (InputScope inputScope = this.scopeStack; inputScope != null; inputScope = inputScope.Parent) {
string nspace = inputScope.ResolveNonAtom(prefix);
if (nspace != null) {
return nspace;
}
}
throw XsltException.Create(Res.Xslt_InvalidPrefix, prefix);
}
public string ResolveXmlNamespace(string prefix) {
Debug.Assert(prefix != null);
if (prefix.Length == 0) {
return this.defaultNS;
}
return ResolveNonEmptyPrefix(prefix);
}
public string ResolveXPathNamespace(string prefix) {
Debug.Assert(prefix != null);
if (prefix.Length == 0) {
return string.Empty;
}
return ResolveNonEmptyPrefix(prefix);
}
internal void InsertExtensionNamespaces(string[] nsList) {
Debug.Assert(this.scopeStack != null, "PushScope wasn't called");
Debug.Assert(nsList != null);
for (int idx = 0; idx < nsList.Length; idx++) {
this.scopeStack.InsertExtensionNamespace(nsList[idx]);
}
}
internal bool IsExtensionNamespace(String nspace) {
Debug.Assert(this.scopeStack != null, "PushScope wasn't called");
for (InputScope inputScope = this.scopeStack; inputScope != null; inputScope = inputScope.Parent) {
if (inputScope.IsExtensionNamespace( nspace )) {
return true;
}
}
return false;
}
internal void InsertExcludedNamespaces(string[] nsList) {
Debug.Assert(this.scopeStack != null, "PushScope wasn't called");
Debug.Assert(nsList != null);
for (int idx = 0; idx < nsList.Length; idx++) {
this.scopeStack.InsertExcludedNamespace(nsList[idx]);
}
}
internal bool IsExcludedNamespace(String nspace) {
Debug.Assert(this.scopeStack != null, "PushScope wasn't called");
for (InputScope inputScope = this.scopeStack; inputScope != null; inputScope = inputScope.Parent) {
if (inputScope.IsExcludedNamespace( nspace )) {
return true;
}
}
return false;
}
}
}
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