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#region MIT license
//
// MIT license
//
// Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#endregion
using System;
using System.IO;
namespace DbLinq.Util
{
internal static class Output
{
/// <summary>
/// Writes a warning
/// </summary>
/// <param name="textWriter"></param>
/// <param name="format"></param>
/// <param name="arg"></param>
public static void WriteWarningLine(this TextWriter textWriter, string format, params object[] arg)
{
WriteLine(textWriter, OutputLevel.Warning, format, arg);
}
/// <summary>
/// Writes an error
/// </summary>
/// <param name="textWriter"></param>
/// <param name="format"></param>
/// <param name="arg"></param>
public static void WriteErrorLine(this TextWriter textWriter, string format, params object[] arg)
{
WriteLine(textWriter, OutputLevel.Error, format, arg);
}
/// <summary>
/// Internal main write method.
/// Depending on the output type, we may want to
/// </summary>
/// <param name="textWriter"></param>
/// <param name="outputLevel"></param>
/// <param name="format"></param>
/// <param name="arg"></param>
public static void WriteLine(TextWriter textWriter, OutputLevel outputLevel, string format, params object[] arg)
{
if (IsConsole(textWriter))
WriteConsoleLine(outputLevel, format, arg);
else
textWriter.WriteLine(format, arg);
}
/// <summary>
/// Writes to console, using specified information level
/// </summary>
/// <param name="outputLevel"></param>
/// <param name="format"></param>
/// <param name="arg"></param>
public static void WriteConsoleLine(OutputLevel outputLevel, string format, params object[] arg)
{
ConsoleColor? consoleForegroundColor;
TextWriter consoleOutput;
// depending on output level, color and textwriter are set
switch (outputLevel)
{
case OutputLevel.Debug:
consoleForegroundColor = ConsoleColor.Blue;
consoleOutput = Console.Out;
break;
case OutputLevel.Information:
consoleForegroundColor = null;
consoleOutput = Console.Out;
break;
case OutputLevel.Warning:
consoleForegroundColor = ConsoleColor.Yellow;
consoleOutput = Console.Out;
break;
case OutputLevel.Error:
consoleForegroundColor = ConsoleColor.Red;
consoleOutput = Console.Error;
break;
default:
throw new ArgumentOutOfRangeException("outputLevel");
}
try
{
// optionnaly set the color
if (consoleForegroundColor.HasValue)
Console.ForegroundColor = consoleForegroundColor.Value;
// and write
consoleOutput.WriteLine(format, arg);
}
finally
{
// since the WriteLine may return exceptions if the format is invalid
// we reset the color here
if (consoleForegroundColor.HasValue)
Console.ResetColor();
}
}
/// <summary>
/// Tells if we're writing on the console.
/// </summary>
/// <param name="textWriter"></param>
/// <returns></returns>
private static bool IsConsole(TextWriter textWriter)
{
return textWriter == Console.Out || textWriter == Console.Error;
}
}
}
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