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// Copyright © Microsoft Corporation.
// This source file is subject to the Microsoft Permissive License.
// See http://www.microsoft.com/resources/sharedsource/licensingbasics/sharedsourcelicenses.mspx.
// All other rights reserved.
using System;
using System.Collections.Generic;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Xsl;
namespace Microsoft.Ddue.Tools {
public class BuildContext {
private CustomContext context = new CustomContext();
// Namespace control
public void AddNamespace (string prefix, string uri) {
context.AddNamespace(prefix, uri);
}
public string LookupNamespace (string prefix) {
return( context.LookupNamespace(prefix) );
}
public bool RemoveNamespace (string prefix) {
string uri = LookupNamespace(prefix);
if (uri == null) {
return(false);
} else {
context.RemoveNamespace(prefix, uri);
return(true);
}
}
public void ClearNamespaces () {
}
// Variable control
public void AddVariable (string name, string value) {
context[name] = value;
}
public string LookupVariable (string name) {
return( context[name] );
}
public bool RemoveVariable (string name) {
return( context.ClearVariable(name) );
}
public void ClearVariables () {
context.ClearVariables();
}
public string this [string name] {
get {
return(context[name]);
}
set {
context[name] = value;
}
}
// Function control
// The context for use in XPath queries
public XsltContext XsltContext {
get {
return(context);
}
}
// Load data from config
public void Load (XPathNavigator configuration) {
XPathNodeIterator namespaceNodes = configuration.Select("namespace");
foreach (XPathNavigator namespaceNode in namespaceNodes) {
string prefixValue = namespaceNode.GetAttribute("prefix", String.Empty);
string uriValue = namespaceNode.GetAttribute("uri", String.Empty);
AddNamespace(prefixValue, uriValue);
}
}
}
public class CustomContext : XsltContext {
public CustomContext() : base() {}
// variable control
private Dictionary<string, IXsltContextVariable> variables = new Dictionary<string,IXsltContextVariable>();
public string this [string variable] {
get {
return(variables[variable].Evaluate(this).ToString());
}
set {
variables[variable] = new CustomVariable(value);
}
}
public bool ClearVariable (string name) {
return( variables.Remove(name) );
}
public void ClearVariables () {
variables.Clear();
}
// Implementation of XsltContext methods
public override IXsltContextVariable ResolveVariable (string prefix, string name) {
return( variables[name] );
}
public override IXsltContextFunction ResolveFunction (string prefix, string name, XPathResultType[] argumentTypes) {
throw new NotImplementedException();
}
public override int CompareDocument (string baseUri, string nextBaseUri) {
return(0);
}
public override bool Whitespace {
get {
return(true);
}
}
public override bool PreserveWhitespace (XPathNavigator node) {
return(true);
}
}
internal struct CustomVariable : IXsltContextVariable {
public CustomVariable (string value) {
this.value = value;
}
private string value;
public bool IsLocal {
get {
return(false);
}
}
public bool IsParam {
get {
return(false);
}
}
public XPathResultType VariableType {
get {
return(XPathResultType.String);
}
}
public Object Evaluate (XsltContext context) {
return(value);
}
}
}
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