mcs/class/referencesource/System.Activities/System/Activities/XamlIntegration/XamlWriterExtensions.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4
   5 namespace System.Activities.XamlIntegration
   6 {
   7     using System;
   8     using System.Xaml;
   9     using System.Runtime;
  10
  11     static class XamlWriterExtensions
  12     {
  13         public static void PropagateLineInfo(XamlWriter targetWriter, IXamlLineInfo lineInfo)
  14         {
  15             if (lineInfo != null)
  16             {
  17                 IXamlLineInfoConsumer consumer = targetWriter as IXamlLineInfoConsumer;
  18                 Fx.Assert(consumer != null && consumer.ShouldProvideLineInfo, "Should only call this function to write into a XamlNodeQueue.Writer, which is always IXamlLineInfoConsumer");
  19                 consumer.SetLineInfo(lineInfo.LineNumber, lineInfo.LinePosition);
  20             }
  21         }
  22
  23         public static void PropagateLineInfo(XamlWriter targetWriter, int lineNumber, int linePosition)
  24         {
  25             IXamlLineInfoConsumer consumer = targetWriter as IXamlLineInfoConsumer;
  26             Fx.Assert(consumer != null && consumer.ShouldProvideLineInfo, "Should only call this function to write into a XamlNodeQueue.Writer, which is always IXamlLineInfoConsumer");
  27             consumer.SetLineInfo(lineNumber, linePosition);
  28         }
  29
  30         // This method is a workaround for TFS
  31         public static void Transform(XamlReader reader, XamlWriter writer, IXamlLineInfo readerLineInfo, bool closeWriter)
  32         {
  33             IXamlLineInfoConsumer consumer = writer as IXamlLineInfoConsumer;
  34             Fx.Assert(consumer != null && consumer.ShouldProvideLineInfo, "Should only call this function to write into a XamlNodeQueue.Writer, which is always IXamlLineInfoConsumer");
  35             bool shouldPassLineNumberInfo = false;
  36             if (readerLineInfo != null)
  37             {
  38                 shouldPassLineNumberInfo = true;
  39             }
  40
  41             while (reader.Read())
  42             {
  43                 if (shouldPassLineNumberInfo)
  44                 {
  45                     consumer.SetLineInfo(readerLineInfo.LineNumber, readerLineInfo.LinePosition);
  46                 }
  47                 writer.WriteNode(reader);
  48             }
  49
  50             if (closeWriter)
  51             {
  52                 writer.Close();
  53             }
  54         }
  55
  56         public static void WriteNode(this XamlWriter writer, XamlReader reader, IXamlLineInfo lineInfo)
  57         {
  58             PropagateLineInfo(writer, lineInfo);
  59             writer.WriteNode(reader);
  60         }
  61
  62         public static void WriteEndMember(this XamlWriter writer, IXamlLineInfo lineInfo)
  63         {
  64             PropagateLineInfo(writer, lineInfo);
  65             writer.WriteEndMember();
  66         }
  67
  68         public static void WriteEndObject(this XamlWriter writer, IXamlLineInfo lineInfo)
  69         {
  70             PropagateLineInfo(writer, lineInfo);
  71             writer.WriteEndObject();
  72         }
  73
  74         public static void WriteGetObject(this XamlWriter writer, IXamlLineInfo lineInfo)
  75         {
  76             PropagateLineInfo(writer, lineInfo);
  77             writer.WriteGetObject();
  78         }
  79
  80         public static void WriteNamespace(this XamlWriter writer, NamespaceDeclaration namespaceDeclaration, IXamlLineInfo lineInfo)
  81         {
  82             PropagateLineInfo(writer, lineInfo);
  83             writer.WriteNamespace(namespaceDeclaration);
  84         }
  85
  86         public static void WriteStartMember(this XamlWriter writer, XamlMember xamlMember, IXamlLineInfo lineInfo)
  87         {
  88             PropagateLineInfo(writer, lineInfo);
  89             writer.WriteStartMember(xamlMember);
  90         }
  91
  92         public static void WriteStartMember(this XamlWriter writer, XamlMember xamlMember, int lineNumber, int linePosition)
  93         {
  94             PropagateLineInfo(writer, lineNumber, linePosition);
  95             writer.WriteStartMember(xamlMember);
  96         }
  97
  98         public static void WriteStartObject(this XamlWriter writer, XamlType type, IXamlLineInfo lineInfo)
  99         {
 100             PropagateLineInfo(writer, lineInfo);
 101             writer.WriteStartObject(type);
 102         }
 103
 104         public static void WriteValue(this XamlWriter writer, object value, IXamlLineInfo lineInfo)
 105         {
 106             PropagateLineInfo(writer, lineInfo);
 107             writer.WriteValue(value);
 108         }
 109     }
 110 }