XamlTreeBuilderBamlRecordWriter.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Framework / System / Windows / Markup / XamlTreeBuilderBamlRecordWriter.cs / 1 / XamlTreeBuilderBamlRecordWriter.cs
                        
                        
                            /****************************************************************************\ 
*
* File: XamlTreeBuilderBamlRecordWriter.cs
*
* Purpose: Class that writes baml records when building a tree directly 
*          from xaml
* 
* History: 
*    6/06/01:    rogerg        Created
*    5/29/03:    peterost      Ported to wcp 
*    11/13/03:   peterost      split from XamlTreeBuilder.cs
*
* Copyright (C) 2003 by Microsoft Corporation.  All rights reserved.
* 
\***************************************************************************/
 
using System; 
using System.Xml;
using System.IO; 
using System.Windows;
using System.Text;
using System.Collections;
using System.ComponentModel; 

using System.Diagnostics; 
using System.Reflection; 
using System.Windows.Threading;
 
using MS.Utility;

namespace System.Windows.Markup
{ 

    ///  
    /// Override class for BamlRecordWriter when building tree Directly from XAML. 
    /// We do this so in the [....] case we can build the tree directly instead
    /// of writing to a BAMLStream.  Note that building a tree directly from xaml 
    /// DOES NOT support defer loaded content
    /// 
    internal class XamlTreeBuilderBamlRecordWriter : BamlRecordWriter
    { 

#region Constructors 
 
        internal XamlTreeBuilderBamlRecordWriter(
            XamlTreeBuilder treeBuilder, 
            Stream          stream,
            ParserContext   parserContext,
            bool            isSerializer )
            : base(stream,parserContext,false) 
        {
            _treeBuilder = treeBuilder; 
            _writerStream = stream as WriterStream; 

            // If we're in a nested parser, then we need to track it in our 
            // _customSerializerNestingLevel counter.  Otherwise we'll flush
            // Baml records to the reader thread too soon in WriteBamlRecord.

            if( isSerializer ) 
            {
                _customSerializerNestingLevel = 1; 
            } 

            Debug.Assert(null != _writerStream,"Stream for Writer is not a WriterStream"); 
        }

#endregion Constructors
 

#region Overrides 
 
        internal override void WriteBamlRecord(
            BamlRecord bamlRecord, 
            int        lineNumber,
            int        linePosition)
        {
            bool bamlRecordHandled = false; 

            // Try to load the Baml record.  This will work if we're in [....] mode 
            // (default case), or if we're in async mode and processing the root. 

            bamlRecordHandled = TreeBuilder.BamlRecordWriterSyncUpdate(bamlRecord, 
                                                       lineNumber, linePosition);

            // If it didn't get handled, write the baml record to the baml stream.
 
            if (!bamlRecordHandled)
            { 
                // Write the record. 
                base.WriteBamlRecord(bamlRecord, lineNumber, linePosition);
 
                // Nowe we see if we can let the reader see this record.  We can't if we're within
                // a custom serializer.  (This was added so that templates & styles wouldn't get sealed
                // before being fully loaded, an alternative would be to use ISupportInitialize.)
 
                // Is this a start record?
 
                BamlElementStartRecord bamlElementStartRecord = bamlRecord as BamlElementStartRecord; 
                if (bamlElementStartRecord != null)
                { 
                    // Yes, it's a start record.  If we're not already under a custom serializer,
                    // but this element has one, then start nesting.

                    if (_customSerializerNestingLevel == 0 
                        &&
                        MapTable.HasSerializerForTypeId(bamlElementStartRecord.TypeId)) 
                    { 
                        _customSerializerNestingLevel = 1;
                    } 

                    // Or, if we're already under a custom serializer, increment the nesting level.
                    else if (_customSerializerNestingLevel > 0)
                    { 
                        ++_customSerializerNestingLevel;
                    } 
                } 

                // This isn't a start record.  But if we're under a custom serializer, 
                // we might need to update the nesting level.

                else if (_customSerializerNestingLevel != 0)
                { 
                    // If this is an end element record, decrement the nesting level.
 
                    BamlElementEndRecord bamlElementEndRecord = bamlRecord as BamlElementEndRecord; 
                    if (bamlElementEndRecord != null)
                    { 
                        --_customSerializerNestingLevel;
                    }
                }
 
                // If we're not (now) under a custom serializer context, tell the reader
                // about all of the records we've written. 
 
                if (_customSerializerNestingLevel == 0)
                { 
                    WriterStream.UpdateReaderLength(WriterStream.Length );
                }

            } 
        }
 
        ///  
        /// sets the number of Records that can be read at a time
        ///  in async mode. main use is for debugging. 
        /// 
        /// number of Records we are allowed to read
        internal override void SetMaxAsyncRecords(int maxAsyncRecords)
        { 
            TreeBuilder.MaxAsyncRecords = maxAsyncRecords;
        } 
 

        ///  
        /// Called to determine if it is okay for ParentNodes to be updated
        /// since building the tree directly we can't seek back to update
        /// the parent nodes so false is always returned.
        ///  
        internal override bool UpdateParentNodes
        { 
            get 
            {
                return false; 
            }
        }

        // If building a tree directly, just store the strings directly in the BAML record. 
        // Don't have to precreate the DP object, stream it out and then re-create it as this
        // is extra work, so custom serialization is not allowed. 
 
        internal override void WriteProperty(XamlPropertyNode xamlPropertyNode)
        { 
            BaseWriteProperty(xamlPropertyNode);
        }

 
#endregion Overrides
 
#region Properties 

        ///  
        /// TreeBuilder associated with this class
        /// 
        internal XamlTreeBuilder TreeBuilder
        { 
            get { return _treeBuilder; }
        } 
 
        /// 
        /// Writer stream records are written to. 
        /// Hold onto this so we can updateThe Reader length to keep the
        /// BamlRecords class unaware of the ReaderWriter Stream
        /// 
        private WriterStream WriterStream 
        {
            get { return _writerStream; } 
        } 

        ///  
        ///  When creating a tree directly from Xaml, use the record reader's
        ///  BamlRecordManager, since its record releasing behavior is modified
        ///  based on the markup it is reading in
        ///  
        internal override BamlRecordManager BamlRecordManager
        { 
            get { return _treeBuilder.RecordReader.BamlRecordManager; } 
        }
 
#endregion Properties

#region Data
        XamlTreeBuilder _treeBuilder; 
        WriterStream    _writerStream;
        int _customSerializerNestingLevel = 0; 
#endregion Data 

    } 

}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
/****************************************************************************\ 
*
* File: XamlTreeBuilderBamlRecordWriter.cs
*
* Purpose: Class that writes baml records when building a tree directly 
*          from xaml
* 
* History: 
*    6/06/01:    rogerg        Created
*    5/29/03:    peterost      Ported to wcp 
*    11/13/03:   peterost      split from XamlTreeBuilder.cs
*
* Copyright (C) 2003 by Microsoft Corporation.  All rights reserved.
* 
\***************************************************************************/
 
using System; 
using System.Xml;
using System.IO; 
using System.Windows;
using System.Text;
using System.Collections;
using System.ComponentModel; 

using System.Diagnostics; 
using System.Reflection; 
using System.Windows.Threading;
 
using MS.Utility;

namespace System.Windows.Markup
{ 

    ///  
    /// Override class for BamlRecordWriter when building tree Directly from XAML. 
    /// We do this so in the [....] case we can build the tree directly instead
    /// of writing to a BAMLStream.  Note that building a tree directly from xaml 
    /// DOES NOT support defer loaded content
    /// 
    internal class XamlTreeBuilderBamlRecordWriter : BamlRecordWriter
    { 

#region Constructors 
 
        internal XamlTreeBuilderBamlRecordWriter(
            XamlTreeBuilder treeBuilder, 
            Stream          stream,
            ParserContext   parserContext,
            bool            isSerializer )
            : base(stream,parserContext,false) 
        {
            _treeBuilder = treeBuilder; 
            _writerStream = stream as WriterStream; 

            // If we're in a nested parser, then we need to track it in our 
            // _customSerializerNestingLevel counter.  Otherwise we'll flush
            // Baml records to the reader thread too soon in WriteBamlRecord.

            if( isSerializer ) 
            {
                _customSerializerNestingLevel = 1; 
            } 

            Debug.Assert(null != _writerStream,"Stream for Writer is not a WriterStream"); 
        }

#endregion Constructors
 

#region Overrides 
 
        internal override void WriteBamlRecord(
            BamlRecord bamlRecord, 
            int        lineNumber,
            int        linePosition)
        {
            bool bamlRecordHandled = false; 

            // Try to load the Baml record.  This will work if we're in [....] mode 
            // (default case), or if we're in async mode and processing the root. 

            bamlRecordHandled = TreeBuilder.BamlRecordWriterSyncUpdate(bamlRecord, 
                                                       lineNumber, linePosition);

            // If it didn't get handled, write the baml record to the baml stream.
 
            if (!bamlRecordHandled)
            { 
                // Write the record. 
                base.WriteBamlRecord(bamlRecord, lineNumber, linePosition);
 
                // Nowe we see if we can let the reader see this record.  We can't if we're within
                // a custom serializer.  (This was added so that templates & styles wouldn't get sealed
                // before being fully loaded, an alternative would be to use ISupportInitialize.)
 
                // Is this a start record?
 
                BamlElementStartRecord bamlElementStartRecord = bamlRecord as BamlElementStartRecord; 
                if (bamlElementStartRecord != null)
                { 
                    // Yes, it's a start record.  If we're not already under a custom serializer,
                    // but this element has one, then start nesting.

                    if (_customSerializerNestingLevel == 0 
                        &&
                        MapTable.HasSerializerForTypeId(bamlElementStartRecord.TypeId)) 
                    { 
                        _customSerializerNestingLevel = 1;
                    } 

                    // Or, if we're already under a custom serializer, increment the nesting level.
                    else if (_customSerializerNestingLevel > 0)
                    { 
                        ++_customSerializerNestingLevel;
                    } 
                } 

                // This isn't a start record.  But if we're under a custom serializer, 
                // we might need to update the nesting level.

                else if (_customSerializerNestingLevel != 0)
                { 
                    // If this is an end element record, decrement the nesting level.
 
                    BamlElementEndRecord bamlElementEndRecord = bamlRecord as BamlElementEndRecord; 
                    if (bamlElementEndRecord != null)
                    { 
                        --_customSerializerNestingLevel;
                    }
                }
 
                // If we're not (now) under a custom serializer context, tell the reader
                // about all of the records we've written. 
 
                if (_customSerializerNestingLevel == 0)
                { 
                    WriterStream.UpdateReaderLength(WriterStream.Length );
                }

            } 
        }
 
        ///  
        /// sets the number of Records that can be read at a time
        ///  in async mode. main use is for debugging. 
        /// 
        /// number of Records we are allowed to read
        internal override void SetMaxAsyncRecords(int maxAsyncRecords)
        { 
            TreeBuilder.MaxAsyncRecords = maxAsyncRecords;
        } 
 

        ///  
        /// Called to determine if it is okay for ParentNodes to be updated
        /// since building the tree directly we can't seek back to update
        /// the parent nodes so false is always returned.
        ///  
        internal override bool UpdateParentNodes
        { 
            get 
            {
                return false; 
            }
        }

        // If building a tree directly, just store the strings directly in the BAML record. 
        // Don't have to precreate the DP object, stream it out and then re-create it as this
        // is extra work, so custom serialization is not allowed. 
 
        internal override void WriteProperty(XamlPropertyNode xamlPropertyNode)
        { 
            BaseWriteProperty(xamlPropertyNode);
        }

 
#endregion Overrides
 
#region Properties 

        ///  
        /// TreeBuilder associated with this class
        /// 
        internal XamlTreeBuilder TreeBuilder
        { 
            get { return _treeBuilder; }
        } 
 
        /// 
        /// Writer stream records are written to. 
        /// Hold onto this so we can updateThe Reader length to keep the
        /// BamlRecords class unaware of the ReaderWriter Stream
        /// 
        private WriterStream WriterStream 
        {
            get { return _writerStream; } 
        } 

        ///  
        ///  When creating a tree directly from Xaml, use the record reader's
        ///  BamlRecordManager, since its record releasing behavior is modified
        ///  based on the markup it is reading in
        ///  
        internal override BamlRecordManager BamlRecordManager
        { 
            get { return _treeBuilder.RecordReader.BamlRecordManager; } 
        }
 
#endregion Properties

#region Data
        XamlTreeBuilder _treeBuilder; 
        WriterStream    _writerStream;
        int _customSerializerNestingLevel = 0; 
#endregion Data 

    } 

}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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XamlTreeBuilderBamlRecordWriter.cs source code in C# .NET

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