EmptyTextWriter.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Adapters / EmptyTextWriter.cs / 1305376 / EmptyTextWriter.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

using System; 
using System.CodeDom.Compiler; 
using System.Collections;
using System.Globalization; 
using System.IO;
using System.Text;
using System.Web.Mobile;
using System.Web.UI.MobileControls; 

#if COMPILING_FOR_SHIPPED_SOURCE 
namespace System.Web.UI.MobileControls.ShippedAdapterSource 
#else
namespace System.Web.UI.MobileControls.Adapters 
#endif

{
    /* 
     * EmptyTextWriter class. Like the Null text writer, but keeps track of whether
     * anything was written or not. 
     * 
     * Copyright (c) 2000 Microsoft Corporation
     */ 

    [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
    internal class EmptyTextWriter : TextWriter
    { 
#if UNUSED_CODE
        bool _writeCalled = false; 
#endif 
        bool _nonWhiteSpaceWritten = false;
 
        internal EmptyTextWriter() : base(CultureInfo.CurrentCulture)
        {
        }
 
#if UNUSED_CODE
        internal /*public*/ bool WriteCalled 
        { 
            get
            { 
                return _writeCalled;
            }
        }
#endif 

        internal /*public*/ bool NonWhiteSpaceWritten 
        { 
            get
            { 
                return _nonWhiteSpaceWritten;
            }
        }
 
        internal /*public*/ void Reset()
        { 
#if UNUSED_CODE 
            _writeCalled = false;
#endif 
            _nonWhiteSpaceWritten = false;
        }

        public override void Write(string s) 
        {
#if UNUSED_CODE 
            _writeCalled = true; 
#endif
            if (!IsWhiteSpace(s)) 
            {
                _nonWhiteSpaceWritten = true;
            }
        } 

        public override void Write(bool value) 
        { 
#if UNUSED_CODE
            _writeCalled = true; 
#endif
            _nonWhiteSpaceWritten = true;
        }
 
        public override void Write(char value)
        { 
#if UNUSED_CODE 
            _writeCalled = true;
#endif 
            _nonWhiteSpaceWritten = true;
        }

        public override void Write(char[] buffer) 
        {
#if UNUSED_CODE 
            _writeCalled = true; 
#endif
            if (!IsWhiteSpace(buffer)) 
            {
                _nonWhiteSpaceWritten = true;
            }
        } 

        public override void Write(char[] buffer, int index, int count) 
        { 
#if UNUSED_CODE
            _writeCalled = true; 
#endif
            if (!IsWhiteSpace(buffer, index, count))
            {
                _nonWhiteSpaceWritten = true; 
            }
        } 
 
        public override void Write(double value)
        { 
#if UNUSED_CODE
            _writeCalled = true;
#endif
            _nonWhiteSpaceWritten = true; 
        }
 
        public override void Write(float value) 
        {
#if UNUSED_CODE 
            _writeCalled = true;
#endif
            _nonWhiteSpaceWritten = true;
        } 

        public override void Write(int value) 
        { 
#if UNUSED_CODE
            _writeCalled = true; 
#endif
            _nonWhiteSpaceWritten = true;
        }
 
        public override void Write(long value)
        { 
#if UNUSED_CODE 
            _writeCalled = true;
#endif 
            _nonWhiteSpaceWritten = true;
        }

        public override void Write(Object value) 
        {
#if UNUSED_CODE 
            _writeCalled = true; 
#endif
            if (value != null && !IsWhiteSpace(value.ToString())) 
            {
                _nonWhiteSpaceWritten = true;
            }
        } 

        public override void Write(String format, Object arg0) 
        { 
#if UNUSED_CODE
            _writeCalled = true; 
#endif
            if (!IsWhiteSpace(format) && !IsWhiteSpace(String.Format(CultureInfo.CurrentCulture, format, arg0)))
            {
                _nonWhiteSpaceWritten = true; 
            }
        } 
 
        public override void Write(String format, Object arg0, Object arg1)
        { 
#if UNUSED_CODE
            _writeCalled = true;
#endif
            if (!IsWhiteSpace(format) && !IsWhiteSpace(String.Format(CultureInfo.CurrentCulture, format, arg0, arg1))) 
            {
                _nonWhiteSpaceWritten = true; 
            } 
        }
 
        public override void Write(String format, params object[] arg)
        {
#if UNUSED_CODE
            _writeCalled = true; 
#endif
            if (!IsWhiteSpace(format) && !IsWhiteSpace(String.Format(CultureInfo.CurrentCulture, format, arg))) 
            { 
                _nonWhiteSpaceWritten = true;
            } 
        }

        public override void WriteLine(string s)
        { 
#if UNUSED_CODE
            _writeCalled = true; 
#endif 
            if (!IsWhiteSpace(s))
            { 
                _nonWhiteSpaceWritten = true;
            }
        }
 
        public override void WriteLine(bool value)
        { 
#if UNUSED_CODE 
            _writeCalled = true;
#endif 
            _nonWhiteSpaceWritten = true;
        }

        public override void WriteLine(char value) 
        {
#if UNUSED_CODE 
            _writeCalled = true; 
#endif
            _nonWhiteSpaceWritten = true; 
        }

        public override void WriteLine(char[] buffer)
        { 
#if UNUSED_CODE
            _writeCalled = true; 
#endif 
            if (!IsWhiteSpace(buffer))
            { 
                _nonWhiteSpaceWritten = true;
            }
        }
 
        public override void WriteLine(char[] buffer, int index, int count)
        { 
#if UNUSED_CODE 
            _writeCalled = true;
#endif 
            if (!IsWhiteSpace(buffer, index, count))
            {
                _nonWhiteSpaceWritten = true;
            } 
        }
 
        public override void WriteLine(double value) 
        {
#if UNUSED_CODE 
            _writeCalled = true;
#endif
            _nonWhiteSpaceWritten = true;
        } 

        public override void WriteLine(float value) 
        { 
#if UNUSED_CODE
            _writeCalled = true; 
#endif
            _nonWhiteSpaceWritten = true;
        }
 
        public override void WriteLine(int value)
        { 
#if UNUSED_CODE 
            _writeCalled = true;
#endif 
            _nonWhiteSpaceWritten = true;
        }

        public override void WriteLine(long value) 
        {
#if UNUSED_CODE 
            _writeCalled = true; 
#endif
            _nonWhiteSpaceWritten = true; 
        }

        public override void WriteLine(Object value)
        { 
#if UNUSED_CODE
            _writeCalled = true; 
#endif 
            if (value != null && !IsWhiteSpace(value.ToString()))
            { 
                _nonWhiteSpaceWritten = true;
            }
        }
 
        public override void WriteLine(String format, Object arg0)
        { 
#if UNUSED_CODE 
            _writeCalled = true;
#endif 
            if (!IsWhiteSpace(format) && !IsWhiteSpace(String.Format(CultureInfo.CurrentCulture, format, arg0)))
            {
                _nonWhiteSpaceWritten = true;
            } 
        }
 
        public override void WriteLine(String format, Object arg0, Object arg1) 
        {
#if UNUSED_CODE 
            _writeCalled = true;
#endif
            if (!IsWhiteSpace(format) && !IsWhiteSpace(String.Format(CultureInfo.CurrentCulture, format, arg0, arg1)))
            { 
                _nonWhiteSpaceWritten = true;
            } 
        } 

        public override void WriteLine(String format, params object[] arg) 
        {
#if UNUSED_CODE
            _writeCalled = true;
#endif 
            if (!IsWhiteSpace(format) && !IsWhiteSpace(String.Format(CultureInfo.CurrentCulture, format, arg)))
            { 
                _nonWhiteSpaceWritten = true; 
            }
        } 

        public override void WriteLine(UInt32 value)
        {
#if UNUSED_CODE 
            _writeCalled = true;
#endif 
            _nonWhiteSpaceWritten = true; 
        }
 
        public override Encoding Encoding
        {
            get
            { 
                return Encoding.UTF8;
            } 
        } 

        private static bool IsWhiteSpace(String s) 
        {
            if (s == null)
            {
                return true; 
            }
 
            for (int i = s.Length - 1; i >= 0; i--) 
            {
                char c = s[i]; 
                if (c != '\r' && c != '\n' && !Char.IsWhiteSpace(c))
                {
                    return false;
                } 
            }
 
            return true; 
        }
 
        private static bool IsWhiteSpace(char[] buffer)
        {
            if (buffer == null)
            { 
                return true;
            } 
 
            return IsWhiteSpace(buffer, 0, buffer.Length);
        } 

        private static bool IsWhiteSpace(char[] buffer, int index, int count)
        {
            if (buffer == null) 
            {
                return true; 
            } 

            for (int i = 0; i < count; i++) 
            {
                char c = buffer[index + i];
                if (c != '\r' && c != '\n' && !Char.IsWhiteSpace(c))
                { 
                    return false;
                } 
            } 

            return true; 
        }
    }

} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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