/[RomCheater]/trunk/RomCheater.Logging/LogWriter.cs
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Contents of /trunk/RomCheater.Logging/LogWriter.cs

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Revision 17 - (show annotations) (download)
Wed May 9 08:02:18 2012 UTC (8 years, 4 months ago) by william
File size: 6374 byte(s)
implement basic logging support

1 #define ALLOW_LOG_CLEARING // when defined will allow the log to be cleared
2 using System;
3 using System.Collections.Generic;
4 using System.ComponentModel;
5 using System.Drawing;
6 using System.Data;
7 using System.Linq;
8 using System.Text;
9 using System.Windows.Forms;
10 using System.IO;
11
12 namespace RomCheater.Logging
13 {
14 public partial class LogWriter : UserControl
15 {
16 private delegate string OnGetLogText();
17 private delegate void OnSetLogText(string value);
18 private delegate void GenericVoidDelegate();
19
20 private OnGetLogText HandleGetLogText = null;
21 private OnSetLogText HandleSetLogText = null;
22 private GenericVoidDelegate delegate_EndLogUpdate = null;
23
24 public LogWriter() : this(false) { }
25 public LogWriter(bool redirectConsole)
26 {
27 InitializeComponent();
28 this.Log = new LogStream(this);
29 HandleGetLogText += new OnGetLogText(GetLogText);
30 HandleSetLogText += new OnSetLogText(SetLogText);
31
32 delegate_EndLogUpdate += new GenericVoidDelegate(EndLogUpdate);
33
34 this.RedirectConsoleOutput = redirectConsole;
35 toolTip1.SetToolTip(btnClearLog, "Clears the Log");
36 toolTip1.SetToolTip(btnCopyLogToClipboard, "Copies the Log to the Clipboard");
37 ms = new MemoryStream();
38 sw = new StreamWriter(ms);
39 sw.AutoFlush = true;
40 sr = new StreamReader(ms);
41 }
42 private LogStream _Log;
43 public LogStream Log { get { return _Log; } private set { _Log = value; } }
44
45
46 private MemoryStream ms;
47 private StreamWriter sw;
48 private StreamReader sr;
49
50
51 private bool _RedirectConsoleOutput;
52 public bool RedirectConsoleOutput
53 {
54 get { return _RedirectConsoleOutput; }
55 set
56 {
57 _RedirectConsoleOutput = value;
58 if (value) { Console.SetOut(this.Log); }
59 else
60 {
61 Stream stream = Console.OpenStandardOutput(0x100);
62 TextWriter writer = null;
63 if (stream == Stream.Null) { writer = TextWriter.Synchronized(StreamWriter.Null); }
64 Encoding encoding = this.Log.Encoding;
65 StreamWriter writer2 = new StreamWriter(stream, encoding, 0x100);
66 //writer2.HaveWrittenPreamble = true;
67 writer2.AutoFlush = true;
68 writer = TextWriter.Synchronized(writer2);
69 Console.SetOut(writer);
70 }
71 }
72 }
73
74 private void btnClearLog_Click(object sender, EventArgs e) { this.Clear(true); }
75 private void btnCopyLogToClipboard_Click(object sender, EventArgs e) { Clipboard.SetText(GetLogText()); }
76
77
78 private string PreserveLineEndings(string text) { return text.Replace("\n", System.Environment.NewLine); }
79
80
81 private bool BeginUpdate;
82 public void BeginLogUpdate()
83 {
84 BeginUpdate = true;
85 }
86 public void EndLogUpdate()
87 {
88 if (txtLog.InvokeRequired)
89 {
90 this.Invoke(delegate_EndLogUpdate);
91 }
92 else
93 {
94 StringReader _sr = new StringReader(GetLogText());
95 List<string> lines = new List<string>();
96 string line = "";
97 while ((line = _sr.ReadLine()) != null)
98 {
99 lines.Add(line);
100 }
101 txtLog.Lines = lines.ToArray();
102 BeginUpdate = false;
103 }
104 }
105 private string StreamToString()
106 {
107 string value = "";
108 sr = new StreamReader(ms);
109 sr.BaseStream.Seek(0, SeekOrigin.Begin);
110 value = sr.ReadToEnd();
111 return value;
112 }
113 public string GetLogText()
114 {
115 //if (txtLog.InvokeRequired)
116 //{
117 // return (string)this.Invoke(HandleGetLogText, new object[] { });
118 //}
119 //else
120 //{
121 return PreserveLineEndings(StreamToString());
122 //}
123
124 }
125 public void SetLogText(string value)
126 {
127 //if (txtLog.InvokeRequired)
128 //{
129 // this.Invoke(HandleSetLogText, new object[] { value });
130 //}
131 //else
132 //{
133 // txtLog.AppendText(value);
134 //}
135 sw.Write(value);
136 }
137 new public string Text
138 {
139 get
140 {
141 throw new InvalidOperationException("Please use GetLogText()");
142 }
143 private set
144 {
145 throw new InvalidOperationException("Please use SetLogText(string value)");
146 }
147 }
148
149 public void Clear()
150 {
151 Clear(false);
152 }
153 private void Clear(bool force)
154 {
155 bool allow_log_clearing = false;
156 #if ALLOW_LOG_CLEARING
157 allow_log_clearing = true;
158 #endif
159 if (force || allow_log_clearing)
160 {
161
162 txtLog.Clear();
163 ms = new MemoryStream();
164 sw = new StreamWriter(ms);
165 sw.AutoFlush = true;
166 sr = new StreamReader(ms);
167 }
168 }
169 #region sub-classes
170 public class LogStream : TextWriter
171 {
172 public LogStream() : this(null) { }
173 public LogStream(LogWriter text) : base() { _text_writer = text; this.NewLine = "\n"; }
174 private LogWriter _text_writer;
175 private void _write(string message) { if (_text_writer == null) return; _text_writer.SetLogText(string.Format("{0}", message)); }
176 #region Overriden Methods
177 public override Encoding Encoding { get { return Encoding.UTF8; } }
178 public override void Write(char value) { base.Write(value); _write(value.ToString()); if (!_text_writer.BeginUpdate) _text_writer.EndLogUpdate(); }
179 #endregion
180 }
181 #endregion
182 }
183 }

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