DocumentsTrace.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / documents / DocumentsTrace.cs / 1305600 / DocumentsTrace.cs
                        
                        
                            //#define TRACE 

//----------------------------------------------------------------------------
// 
//      Copyright (C) 2004 by Microsoft Corporation.  All rights reserved. 
// 
// 
// Description: DocumentsTrace is a tracing utility for Fixed and Flow documents 
//
// History: 
//      02/03/2004 - Zhenbin Xu (ZhenbinX) - Created based on System.Windows.Media.Utility.MediaTrace
//
//---------------------------------------------------------------------------
namespace MS.Internal.Documents 
{
    using System; 
    using System.Diagnostics; 
    using System.Reflection;
    using System.Security; 
    using System.Security.Permissions;
    using MS.Internal.PresentationFramework; // SecurityHelper

    internal sealed class DocumentsTrace 
    {
        internal static class FixedFormat 
        { 
#if DEBUG
            public static DocumentsTrace FixedDocument = new DocumentsTrace("FixedFormat-FixedDocument"); 
            public static DocumentsTrace PageContent= new DocumentsTrace("FixedFormat-PageContent");
            public static DocumentsTrace IDF = new DocumentsTrace("FixedFormat-IDFAsync");
#else
            public static DocumentsTrace FixedDocument = null; 
            public static DocumentsTrace PageContent = null;
            public static DocumentsTrace IDF = null; 
#endif 

#if DEBUG 
            static FixedFormat()
            {
                // FixedFormat.IDF.Enable();
                // FixedFormat.FixedDocument.Enable(); 
                // FixedFormat.PageContent.Enable();
            } 
#endif 
        }
 

        internal static class FixedTextOM
        {
#if DEBUG 
            public static DocumentsTrace TextView       = new DocumentsTrace("FixedTextOM-TextView");
            public static DocumentsTrace TextContainer  = new DocumentsTrace("FixedTextOM-TextContainer"); 
            public static DocumentsTrace Map            = new DocumentsTrace("FixedTextOM-FixedFlowMap"); 
            public static DocumentsTrace Highlight      = new DocumentsTrace("FixedTextOM-Highlight");
            public static DocumentsTrace Builder        = new DocumentsTrace("FixedTextOM-FixedTextBuilder"); 
            public static DocumentsTrace FlowPosition   = new DocumentsTrace("FixedTextOM-FlowPosition");
#else
            public static DocumentsTrace TextView = null;
            public static DocumentsTrace TextContainer = null; 
            public static DocumentsTrace Map = null;
            public static DocumentsTrace Highlight = null; 
            public static DocumentsTrace Builder = null; 
            public static DocumentsTrace FlowPosition = null;
 
#endif


#if DEBUG 
            // Note:
            // If you want to enable trace tags without recompiling. This is a good place to put a break point 
            // during start-up. 
            static FixedTextOM()
            { 
                // FixedTextOM.TextView.Enable();
                // FixedTextOM.TextContainer.Enable();
                // FixedTextOM.Map.Enable();
                // FixedTextOM.Highlight.Enable(); 
                // FixedTextOM.Builder.Enable();
                // FixedTextOM.FlowPosition.Enable(); 
            } 
#endif
 
        }


        internal static class FixedDocumentSequence 
        {
#if DEBUG 
            public static DocumentsTrace Content = new DocumentsTrace("FixedDocumentsSequence-Content"); 
            public static DocumentsTrace IDF = new DocumentsTrace("FixedDocumentSequence-IDFAsync");
            public static DocumentsTrace TextOM = new DocumentsTrace("FixedDocumentSequence-TextOM"); 
            public static DocumentsTrace Highlights = new DocumentsTrace("FixedDocumentSequence-Highlights");
#else
            public static DocumentsTrace Content = null;
            public static DocumentsTrace IDF = null; 
            public static DocumentsTrace TextOM = null;
            public static DocumentsTrace Highlights = null; 
#endif 

#if DEBUG 
            static FixedDocumentSequence()
            {
                //FixedDocumentSequence.Content.Enable();
                //FixedDocumentSequence.IDF.Enable(); 
                //FixedDocumentSequence.TextOM.Enable();
                //FixedDocumentSequence.Highlights.Enable(); 
            } 
#endif
        } 

        /// 
        /// Critical - it elevates to get trace listeners collection.
        /// TreatAsSafe - it doesn't disclose the information got through elevation. adding a well-known trace listener is considered safe. 
        /// 
        [SecurityCritical,SecurityTreatAsSafe] 
        static DocumentsTrace() 
        {
#if DEBUG 
            // we are adding console as a listener
            TextWriterTraceListener consoleListener = new TextWriterTraceListener( Console.Out );

            // get the listeners collection 
            TraceListenerCollection listeners = null;
            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Assert(); 
            try 
            {
                listeners = System.Diagnostics.Trace.Listeners; 
            }
            finally
            {
                SecurityPermission.RevertAssert(); 
            }
 
            // add the console listener 
            listeners.Add( consoleListener );
#endif 
        }

        public DocumentsTrace(string switchName)
        { 
#if DEBUG
            string name = SafeSecurityHelper.GetAssemblyPartialName( Assembly.GetCallingAssembly() ); 
            _switch = new BooleanSwitch(switchName, "[" + name + "]"); 
#endif
        } 

        ///
        ///     Critical: sets BooleanSwitch.Enabled which LinkDemands
        ///     TreatAsSafe: ok to enable tracing, and this is debug only 
        ///
        [SecurityCritical, SecurityTreatAsSafe] 
        public DocumentsTrace(string switchName, bool initialState) : this(switchName) 
        {
#if DEBUG 
            _switch.Enabled = initialState;
#endif
        }
 
        [Conditional("DEBUG")]
        public void Trace(string message) 
        { 
#if DEBUG
            if (_switch.Enabled) 
            {
                System.Diagnostics.Trace.WriteLine(_switch.Description + " " + _switch.DisplayName + " : " + message);
            }
#endif 
        }
 
        [Conditional("DEBUG")] 
        public void TraceCallers(int Depth)
        { 
#if DEBUG
            if (_switch.Enabled)
            {
                System.Diagnostics.StackTrace st = new System.Diagnostics.StackTrace(1); 
                if (Depth < 0)
                    Depth = st.FrameCount; 
 
                Indent();
 
                for (int i=0; i < st.FrameCount && i < Depth; i++)
                {
                    System.Diagnostics.StackFrame sf = st.GetFrame(i);
                    Trace(sf.GetMethod()+"+"+sf.GetILOffset().ToString()); 
                }
 
                Unindent(); 
            }
#endif 
        }

        [Conditional("DEBUG")]
        public void Indent() 
        {
#if DEBUG 
            System.Diagnostics.Trace.Indent(); 
#endif
        } 


        [Conditional("DEBUG")]
        public void Unindent() 
        {
#if DEBUG 
            System.Diagnostics.Trace.Unindent(); 
#endif
        } 


        ///
        ///     Critical: sets BooleanSwitch.Enabled which LinkDemands 
        ///     TreatAsSafe: ok to enable tracing, and this is debug only
        /// 
        [SecurityCritical, SecurityTreatAsSafe] 
        [Conditional("DEBUG")]
        public void Enable() 
        {
#if DEBUG
            _switch.Enabled = true;
#endif 
        }
 
        /// 
        ///     Critical: sets BooleanSwitch.Enabled which LinkDemands
        ///     TreatAsSafe: ok to disable tracing, and this is debug only 
        ///
        [SecurityCritical, SecurityTreatAsSafe]
        [Conditional("DEBUG")]
        public void Disable() 
        {
#if DEBUG 
            _switch.Enabled = false; 
#endif
        } 

        public bool IsEnabled
        {
            get 
            {
#if DEBUG 
                return _switch.Enabled; 
#else
                return false; 
#endif
            }
        }
 
#if DEBUG
        private System.Diagnostics.BooleanSwitch _switch; 
#endif 
    }
} 

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

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