Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Markup / TemplateBamlTreeBuilder.cs / 1 / TemplateBamlTreeBuilder.cs
/****************************************************************************\ * * File: TemplateTreeBuilderBamlTranslator.cs * * Purpose: Class that builds a template object from BAML * * History: * 11/22/04: [....] Created * * Copyright (C) 2004 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.Threading; using MS.Utility; namespace System.Windows.Markup { ////// TemplateTreeBuilderBamlTranslator is the TreeBuilder implementation that loads a Template object /// from BAML. /// internal class TemplateTreeBuilderBamlTranslator : TreeBuilderBamlTranslator { #region Constructors ////// Constructor. Set up associated baml reader to /// read the template baml records. /// public TemplateTreeBuilderBamlTranslator( ParserContext parserContext, // context Stream bamlStream, // baml stream, when reading from a file BamlRecord bamlStartRecord, // baml records start, when loading from a dictionary BamlRecord bamlIndexRecord, // Index Record in bamlRecords to start parsing at ParserStack bamlReaderStack, // reader stack ArrayList rootList, // List of root objects for overall parse. XamlParseMode parseMode, // sync or async parse mode int maxAsyncRecords) // number to read in async mode before yielding { BamlStream = bamlStream; RecordReader = new TemplateBamlRecordReader(bamlStream, bamlStartRecord, bamlIndexRecord, parserContext, bamlReaderStack, rootList); XamlParseMode = parseMode; MaxAsyncRecords = maxAsyncRecords; // Set associated record reader async info RecordReader.XamlParseMode = XamlParseMode; RecordReader.MaxAsyncRecords = MaxAsyncRecords; } #endregion Constructors #region Overrides ////// Internal Avalon method. Used to parse template section of a BAML file. /// ///An array containing the root objects in the template portion of a BAML stream public override object ParseFragment() { // if in synchronous mode then just read the baml stream and then // return. if going into async mode then build up the first tag // synchronously and then post a queue item. if (XamlParseMode == XamlParseMode.Synchronous) { RecordReader.Read(); } else { // read in the first record since binder at present // needs this. bool moreData = true; // sit in synchronous read until get first root. Need this // until we get async binder support. while (GetRoot() == null && moreData) { moreData = RecordReader.Read(true /* single record mode*/); } if (moreData && GetRoot() != null) { // before going async want to switch to async stream interfaces // so we don't block on I/O. // setup stream Manager on Reader and kick of Async Writes StreamManager = new ReadWriteStreamManager(); // RecordReader no points to the ReaderWriter stream which // is different from our BAMLStream member. RecordReader.BamlStream = StreamManager.ReaderStream; // now spin a thread to read the BAML. This can change // once we get Read support that fails if contents isn't // available instead of blocks. ThreadStart threadStart = new ThreadStart(ReadBamlAsync); Thread thread = new Thread(threadStart); thread.Start(); // post a work item to do the rest. Post(); } } return GetRoot(); } #endregion Overrides } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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