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 / XamlTreeBuilder.cs / 1 / XamlTreeBuilder.cs
/****************************************************************************\
*
* File: XamlTreeBuilder.cs
*
* Purpose: Class that builds a tree from XAML
*
* History:
* 6/06/01: rogerg Created
* 5/29/03: peterost Ported to wcp
*
* 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;
#if PBTCOMPILER
namespace MS.Internal.Markup
#else
namespace System.Windows.Markup
#endif
{
///
/// XamlTree builder is the TreeBuilder implementation that loads a Tree
/// from XAML.
///
internal class XamlTreeBuilder : TreeBuilder
{
#region Constructors
///
/// Constructor
///
/// ParserContext to Use
/// XmlReader input
/// Should wrap 'reader' with an XML Compatibility Reader
/// Xaml parse mode
internal XamlTreeBuilder(
ParserContext parserContext,
XmlReader reader,
bool wrapWithMarkupCompatReader,
XamlParseMode parseMode)
: base()
{
Debug.Assert(null != parserContext, "ParserContext is null");
Debug.Assert(null != reader, "TextReader input is null");
Debug.Assert(null != parserContext.XamlTypeMapper, "ParserContext XamlTypeMapper is null");
XamlParser xamlParser = new TreeBuilderXamlTranslator(this, parserContext, reader, wrapWithMarkupCompatReader, parseMode);
Initialize(parserContext, xamlParser);
}
///
/// Constructor
///
/// ParserContext
/// input Stream containing the XAML
/// Xaml parse mode
internal XamlTreeBuilder(
ParserContext parserContext,
Stream stream,
XamlParseMode parseMode)
: base()
{
Debug.Assert(null != parserContext, "ParserContext is null");
Debug.Assert(null != stream, "xamlStream is null");
Debug.Assert(null != parserContext.XamlTypeMapper, "ParserContext XamlTypeMapper is null");
XamlParser parser = new TreeBuilderXamlTranslator(this, parserContext, stream, parseMode);
Initialize(parserContext, parser);
}
///
/// Constructor
///
///
/// This constructor is used by sub-classes like
/// StyleXamltreeBuilder or TemplateXamlTreeBuilder.
///
internal XamlTreeBuilder() : base()
{
}
#endregion Constructors
#region Overrides
// overrides from the base treebuilder class
///
/// Internal Avalon method. Used to parse a BAML file.
///
/// An array containing the root objects in the XAML stream
public override object ParseFragment()
{
// setup the ParserHooks
// !!! set this up before asking for the parser mode because
// the parser mode will always force [....] for now if the ParserHooks is set.
_xamlParser.ParserHooks = ParserHooks;
// Determine the Parse Mode by parsing the first element tag. Note that
// we don't want to build the tree top down until we figure out the [....]
// mode because of wierd dependencies on the RootList.
RecordReader.BuildTopDown = false;
XamlParseMode = _xamlParser.GetParseMode();
RecordReader.BuildTopDown = true;
// Should this just silently set MultipleRoots to false?
if(!((XamlParseMode.Synchronous == XamlParseMode)|| !MultipleRoots))
{
throw new ApplicationException(SR.Get(SRID.ParserMultiRoot));
}
// if Parse() is called when loading from XAML just turn around and call
// the XamlParser.
if (Dispatcher.CurrentDispatcher != null)
{
// Turn off property invalidation by using DependencyFastBuild. This
// creation-mode mechanism should only be used when building a tree
// in isolation
//using (DependencyFastBuild.Start())
{
_xamlParser.Parse();
}
}
else
{
_xamlParser.Parse();
}
// its okay for root to be null if its an empty file or the parse
// was stopped.
return GetRoot();
}
#endregion Overrides
#region Methods
///
/// Stops a parse and throws an exception on the TreeBuilder thread if in
/// asynchronous mode
///
/// Exception
internal void XamlTreeBuildError(Exception e)
{
ParseException = e;
}
///
/// Called when the Parser is Cancelled before the
/// Tree has been completely built.
///
internal void XamlTreeBuildCancel()
{
ParseCancelled = true;
}
// internal function for doing any cleanup immediately following
// the tree being complete.
internal override void TreeBuildComplete()
{
if (ParseCompleted != null)
{
// Fire the ParseCompleted event asynchronously
Dispatcher.CurrentDispatcher.BeginInvoke(
DispatcherPriority.Normal,
(DispatcherOperationCallback) delegate(object obj)
{
ParseCompleted(this, EventArgs.Empty);
return null;
},
null);
}
}
///
/// This event is fired when the parse is complete
///
internal event EventHandler ParseCompleted;
///
/// Callback in when a new record has been created from the parse
/// Builder can either immediately use the record "[....] mode"
/// or false can be returned to indicate that the record was not
/// processed and should be written to BAML.
///
/// bamlRecord to process
/// line number in associated xaml file
/// offset from left margin in associated xaml file
/// true if record was handled
internal bool BamlRecordWriterSyncUpdate(
BamlRecord bamlRecord,
int lineNumber,
int linePosition)
{
bool bamlRecordHandled = true;
// !!!! this code relies on the XamlParser sitting on the UIThread
// until we get a root. Therefore XamlParser can't go async until
// after it has finished parsing the root.
// !!! Todo: This code needs to be reworked when get async binding support
// since in async we wouldn't need to sit in a loop to build the root.
if (XamlParseMode != XamlParseMode.Asynchronous || GetRoot() == null)
{
Debug.Assert(false == RecordReader.EndOfDocument); // shouldn't be called after end
// call read passing in the bamlRecord
RecordReader.Read(bamlRecord, lineNumber, linePosition);
// if found the endOfDocument record then mark as complete.
// !!Review, what if we never get an EndOfDocument.
if (RecordReader.EndOfDocument)
{
TreeBuildComplete();
}
else
{
// if got a root we are going to ignore the rest of the [....] calls
// if we are in async mode so post a work item
if (GetRoot() != null && XamlParseMode == XamlParseMode.Asynchronous
&& false == RecordReader.EndOfDocument)
{
// !! first post post the priority as normal so
// don't always get a single record.
Post(DispatcherPriority.Normal);
}
}
}
else
{
// we want to handle this async
bamlRecordHandled = false;
}
return bamlRecordHandled;
}
// common call for Building From Xaml after the XamlParser class
// has been created.
void Initialize(ParserContext parserContext,XamlParser parser)
{
Debug.Assert(null != parserContext,"ParserContext cannot be null");
Debug.Assert(null != parser,"parser paramater is null");
_xamlParser = parser;
// setup StreamManager, don't set our property since the StreamManager
// property is only intended for Async BAML.
ReadWriteStreamManager streamManager = new ReadWriteStreamManager();
// since RecordReader alters the context make a copy to pass into the Reader.
ParserContext readerParserContext = new ParserContext(parserContext);
_bamlWriter = new XamlTreeBuilderBamlRecordWriter(this,streamManager.WriterStream,
parserContext, false /*isSerializer*/ );
RecordReader = new BamlRecordReader(streamManager.ReaderStream,readerParserContext,false /* loadMapTable */);
// give Writer to the Parser.
_xamlParser.BamlRecordWriter = _bamlWriter;
_xamlParser.StreamManager = streamManager;
}
#endregion Methods
#region Properties
///
/// Indicates if Multiple top-level roots are allowed
///
internal bool MultipleRoots
{
get { return false; }
}
///
/// XamlParser that has the main parse loop and writer overrides
///
internal XamlParser Parser
{
get { return _xamlParser; }
set { _xamlParser = value; }
}
///
/// Writer of baml records, either to a stream or to buffer.
///
internal BamlRecordWriter RecordWriter
{
get { return _bamlWriter; }
set { _bamlWriter = value; }
}
#endregion Properties
#region Data
// XamlParser that is being used for Parsing the XAML
XamlParser _xamlParser;
// BamlWriter to use if writing out BAML
BamlRecordWriter _bamlWriter;
#endregion Data
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
/****************************************************************************\
*
* File: XamlTreeBuilder.cs
*
* Purpose: Class that builds a tree from XAML
*
* History:
* 6/06/01: rogerg Created
* 5/29/03: peterost Ported to wcp
*
* 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;
#if PBTCOMPILER
namespace MS.Internal.Markup
#else
namespace System.Windows.Markup
#endif
{
///
/// XamlTree builder is the TreeBuilder implementation that loads a Tree
/// from XAML.
///
internal class XamlTreeBuilder : TreeBuilder
{
#region Constructors
///
/// Constructor
///
/// ParserContext to Use
/// XmlReader input
/// Should wrap 'reader' with an XML Compatibility Reader
/// Xaml parse mode
internal XamlTreeBuilder(
ParserContext parserContext,
XmlReader reader,
bool wrapWithMarkupCompatReader,
XamlParseMode parseMode)
: base()
{
Debug.Assert(null != parserContext, "ParserContext is null");
Debug.Assert(null != reader, "TextReader input is null");
Debug.Assert(null != parserContext.XamlTypeMapper, "ParserContext XamlTypeMapper is null");
XamlParser xamlParser = new TreeBuilderXamlTranslator(this, parserContext, reader, wrapWithMarkupCompatReader, parseMode);
Initialize(parserContext, xamlParser);
}
///
/// Constructor
///
/// ParserContext
/// input Stream containing the XAML
/// Xaml parse mode
internal XamlTreeBuilder(
ParserContext parserContext,
Stream stream,
XamlParseMode parseMode)
: base()
{
Debug.Assert(null != parserContext, "ParserContext is null");
Debug.Assert(null != stream, "xamlStream is null");
Debug.Assert(null != parserContext.XamlTypeMapper, "ParserContext XamlTypeMapper is null");
XamlParser parser = new TreeBuilderXamlTranslator(this, parserContext, stream, parseMode);
Initialize(parserContext, parser);
}
///
/// Constructor
///
///
/// This constructor is used by sub-classes like
/// StyleXamltreeBuilder or TemplateXamlTreeBuilder.
///
internal XamlTreeBuilder() : base()
{
}
#endregion Constructors
#region Overrides
// overrides from the base treebuilder class
///
/// Internal Avalon method. Used to parse a BAML file.
///
/// An array containing the root objects in the XAML stream
public override object ParseFragment()
{
// setup the ParserHooks
// !!! set this up before asking for the parser mode because
// the parser mode will always force [....] for now if the ParserHooks is set.
_xamlParser.ParserHooks = ParserHooks;
// Determine the Parse Mode by parsing the first element tag. Note that
// we don't want to build the tree top down until we figure out the [....]
// mode because of wierd dependencies on the RootList.
RecordReader.BuildTopDown = false;
XamlParseMode = _xamlParser.GetParseMode();
RecordReader.BuildTopDown = true;
// Should this just silently set MultipleRoots to false?
if(!((XamlParseMode.Synchronous == XamlParseMode)|| !MultipleRoots))
{
throw new ApplicationException(SR.Get(SRID.ParserMultiRoot));
}
// if Parse() is called when loading from XAML just turn around and call
// the XamlParser.
if (Dispatcher.CurrentDispatcher != null)
{
// Turn off property invalidation by using DependencyFastBuild. This
// creation-mode mechanism should only be used when building a tree
// in isolation
//using (DependencyFastBuild.Start())
{
_xamlParser.Parse();
}
}
else
{
_xamlParser.Parse();
}
// its okay for root to be null if its an empty file or the parse
// was stopped.
return GetRoot();
}
#endregion Overrides
#region Methods
///
/// Stops a parse and throws an exception on the TreeBuilder thread if in
/// asynchronous mode
///
/// Exception
internal void XamlTreeBuildError(Exception e)
{
ParseException = e;
}
///
/// Called when the Parser is Cancelled before the
/// Tree has been completely built.
///
internal void XamlTreeBuildCancel()
{
ParseCancelled = true;
}
// internal function for doing any cleanup immediately following
// the tree being complete.
internal override void TreeBuildComplete()
{
if (ParseCompleted != null)
{
// Fire the ParseCompleted event asynchronously
Dispatcher.CurrentDispatcher.BeginInvoke(
DispatcherPriority.Normal,
(DispatcherOperationCallback) delegate(object obj)
{
ParseCompleted(this, EventArgs.Empty);
return null;
},
null);
}
}
///
/// This event is fired when the parse is complete
///
internal event EventHandler ParseCompleted;
///
/// Callback in when a new record has been created from the parse
/// Builder can either immediately use the record "[....] mode"
/// or false can be returned to indicate that the record was not
/// processed and should be written to BAML.
///
/// bamlRecord to process
/// line number in associated xaml file
/// offset from left margin in associated xaml file
/// true if record was handled
internal bool BamlRecordWriterSyncUpdate(
BamlRecord bamlRecord,
int lineNumber,
int linePosition)
{
bool bamlRecordHandled = true;
// !!!! this code relies on the XamlParser sitting on the UIThread
// until we get a root. Therefore XamlParser can't go async until
// after it has finished parsing the root.
// !!! Todo: This code needs to be reworked when get async binding support
// since in async we wouldn't need to sit in a loop to build the root.
if (XamlParseMode != XamlParseMode.Asynchronous || GetRoot() == null)
{
Debug.Assert(false == RecordReader.EndOfDocument); // shouldn't be called after end
// call read passing in the bamlRecord
RecordReader.Read(bamlRecord, lineNumber, linePosition);
// if found the endOfDocument record then mark as complete.
// !!Review, what if we never get an EndOfDocument.
if (RecordReader.EndOfDocument)
{
TreeBuildComplete();
}
else
{
// if got a root we are going to ignore the rest of the [....] calls
// if we are in async mode so post a work item
if (GetRoot() != null && XamlParseMode == XamlParseMode.Asynchronous
&& false == RecordReader.EndOfDocument)
{
// !! first post post the priority as normal so
// don't always get a single record.
Post(DispatcherPriority.Normal);
}
}
}
else
{
// we want to handle this async
bamlRecordHandled = false;
}
return bamlRecordHandled;
}
// common call for Building From Xaml after the XamlParser class
// has been created.
void Initialize(ParserContext parserContext,XamlParser parser)
{
Debug.Assert(null != parserContext,"ParserContext cannot be null");
Debug.Assert(null != parser,"parser paramater is null");
_xamlParser = parser;
// setup StreamManager, don't set our property since the StreamManager
// property is only intended for Async BAML.
ReadWriteStreamManager streamManager = new ReadWriteStreamManager();
// since RecordReader alters the context make a copy to pass into the Reader.
ParserContext readerParserContext = new ParserContext(parserContext);
_bamlWriter = new XamlTreeBuilderBamlRecordWriter(this,streamManager.WriterStream,
parserContext, false /*isSerializer*/ );
RecordReader = new BamlRecordReader(streamManager.ReaderStream,readerParserContext,false /* loadMapTable */);
// give Writer to the Parser.
_xamlParser.BamlRecordWriter = _bamlWriter;
_xamlParser.StreamManager = streamManager;
}
#endregion Methods
#region Properties
///
/// Indicates if Multiple top-level roots are allowed
///
internal bool MultipleRoots
{
get { return false; }
}
///
/// XamlParser that has the main parse loop and writer overrides
///
internal XamlParser Parser
{
get { return _xamlParser; }
set { _xamlParser = value; }
}
///
/// Writer of baml records, either to a stream or to buffer.
///
internal BamlRecordWriter RecordWriter
{
get { return _bamlWriter; }
set { _bamlWriter = value; }
}
#endregion Properties
#region Data
// XamlParser that is being used for Parsing the XAML
XamlParser _xamlParser;
// BamlWriter to use if writing out BAML
BamlRecordWriter _bamlWriter;
#endregion Data
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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