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