00001 /******************************************************************************* 00002 00003 @file FlushWriter.d 00004 00005 Copyright (c) 2004 Kris Bell 00006 00007 This software is provided 'as-is', without any express or implied 00008 warranty. In no event will the authors be held liable for damages 00009 of any kind arising from the use of this software. 00010 00011 Permission is hereby granted to anyone to use this software for any 00012 purpose, including commercial applications, and to alter it and/or 00013 redistribute it freely, subject to the following restrictions: 00014 00015 1. The origin of this software must not be misrepresented; you must 00016 not claim that you wrote the original software. If you use this 00017 software in a product, an acknowledgment within documentation of 00018 said product would be appreciated but is not required. 00019 00020 2. Altered source versions must be plainly marked as such, and must 00021 not be misrepresented as being the original software. 00022 00023 3. This notice may not be removed or altered from any distribution 00024 of the source. 00025 00026 4. Derivative works are permitted, but they must carry this notice 00027 in full and credit the original source. 00028 00029 00030 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 00031 00032 00033 @version Initial version; March 2004 00034 00035 @author Kris 00036 00037 00038 *******************************************************************************/ 00039 00040 module mango.io.FlushWriter; 00041 00042 public import mango.io.DisplayWriter; 00043 00044 /******************************************************************************* 00045 00046 Subclass to support automatic flushing. This can be used for 00047 Stdout, Stderr, and other related conduits. 00048 00049 *******************************************************************************/ 00050 00051 class FlushWriter : DisplayWriter 00052 { 00053 alias DisplayWriter.put put; 00054 00055 /*********************************************************************** 00056 00057 Construct a FlushWriter upon the specified IBuffer 00058 00059 ***********************************************************************/ 00060 00061 this (IBuffer buffer) 00062 { 00063 super (buffer); 00064 } 00065 00066 /*********************************************************************** 00067 00068 Construct a FlushWriter upon the specified IConduit 00069 00070 ***********************************************************************/ 00071 00072 this (IConduit conduit) 00073 { 00074 this (new Buffer(conduit)); 00075 } 00076 00077 /********************************************************************** 00078 00079 Intercept the IWritable method to catch newlines, and 00080 flush the buffer whenever one is emitted 00081 00082 ***********************************************************************/ 00083 00084 override IWriter put (IWritable x) 00085 { 00086 // have superclass handle the IWritable 00087 super.put (x); 00088 00089 // flush output when we see a newline 00090 if (cast(INewlineWriter) x) 00091 flush (); 00092 00093 return this; 00094 } 00095 } 00096