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// <copyright>
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
namespace System.Activities.XamlIntegration
{
using System;
using System.Activities.Expressions;
using System.Collections.Generic;
using System.IO;
using System.Xaml;
using System.Xml;
internal static class TextExpressionCompilerHelper
{
public static void GetNamespacesLineInfo(string sourceXamlFileName, Dictionary<string, int> lineNumbersForNSes, Dictionary<string, int> lineNumbersForNSesForImpl)
{
// read until StartMember: TextExpression.NamespacesForImplementation OR TextExpression.Namespaces
// create a subtree reader,
// in the subtree,
// look for StartObject nodes of String type. their values are added to either LineNumbersForNSes or LineNumbersForNSesForImpl dictionaries.
if (!File.Exists(sourceXamlFileName))
{
return;
}
using (XmlReader xmlReader = XmlReader.Create(sourceXamlFileName))
{
using (XamlXmlReader xreader = new XamlXmlReader(xmlReader, new XamlXmlReaderSettings() { ProvideLineInfo = true }))
{
bool hasHitFirstStartObj = false;
while (!hasHitFirstStartObj && xreader.Read())
{
if (xreader.NodeType == XamlNodeType.StartObject)
{
hasHitFirstStartObj = true;
}
}
if (hasHitFirstStartObj)
{
xreader.Read();
do
{
if (IsStartMemberTextExprNS(xreader))
{
XamlReader subTreeReader = xreader.ReadSubtree();
WalkSubTree(subTreeReader, lineNumbersForNSes);
}
else if (IsStartMemberTextExprNSForImpl(xreader))
{
XamlReader subTreeReader = xreader.ReadSubtree();
WalkSubTree(subTreeReader, lineNumbersForNSesForImpl);
}
else
{
xreader.Skip();
}
}
while (!xreader.IsEof);
}
}
}
}
private static bool IsStartMemberTextExprNS(XamlXmlReader xreader)
{
return xreader.NodeType == XamlNodeType.StartMember && xreader.Member.DeclaringType != null &&
xreader.Member.DeclaringType.UnderlyingType == typeof(TextExpression) &&
xreader.Member.Name == "Namespaces";
}
private static bool IsStartMemberTextExprNSForImpl(XamlXmlReader xreader)
{
return xreader.NodeType == XamlNodeType.StartMember && xreader.Member.DeclaringType != null &&
xreader.Member.DeclaringType.UnderlyingType == typeof(TextExpression) &&
xreader.Member.Name == "NamespacesForImplementation";
}
private static bool IsNamespaceString(XamlReader subTreeReader)
{
return subTreeReader.NodeType == XamlNodeType.StartObject && subTreeReader.Type.UnderlyingType == typeof(string);
}
private static void WalkSubTree(XamlReader subTreeReader, Dictionary<string, int> lineNumbersDictionary)
{
while (subTreeReader.Read())
{
if (IsNamespaceString(subTreeReader))
{
while (subTreeReader.NodeType != XamlNodeType.Value)
{
subTreeReader.Read();
}
IXamlLineInfo ixamlLineInfo = (IXamlLineInfo)subTreeReader;
string namespaceName = subTreeReader.Value as string;
if (!string.IsNullOrEmpty(namespaceName))
{
lineNumbersDictionary[namespaceName] = ixamlLineInfo.LineNumber;
}
}
}
}
}
}
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