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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="LogViewModel.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// Defines the LogViewModel type.
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrakeWPF.ViewModels
{
using System;
using System.Diagnostics;
using System.Text;
using System.Windows;
using Caliburn.Micro;
using HandBrake.ApplicationServices.Services.Logging;
using HandBrake.ApplicationServices.Services.Logging.EventArgs;
using HandBrake.ApplicationServices.Services.Logging.Model;
using HandBrakeWPF.ViewModels.Interfaces;
using ILog = HandBrake.ApplicationServices.Services.Logging.Interfaces.ILog;
/// <summary>
/// The Log View Model
/// </summary>
public class LogViewModel : ViewModelBase, ILogViewModel
{
#region Private Fields
private readonly ILog logService;
private StringBuilder log = new StringBuilder();
private long lastReadIndex;
#endregion
/// <summary>
/// Initializes a new instance of the <see cref="LogViewModel"/> class.
/// </summary>
public LogViewModel()
{
this.logService = LogService.GetLogger();
this.Title = "Log Viewer";
}
/// <summary>
/// Gets Log.
/// </summary>
public string ActivityLog
{
get
{
return this.log.ToString();
}
}
/// <summary>
/// The log message received.
/// </summary>
public event EventHandler<LogEventArgs> LogMessageReceived;
/// <summary>
/// Open the Log file directory
/// </summary>
public void OpenLogDirectory()
{
string logDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\HandBrake\\logs";
string windir = Environment.GetEnvironmentVariable("WINDIR");
Process prc = new Process { StartInfo = { FileName = windir + @"\explorer.exe", Arguments = logDir } };
prc.Start();
}
/// <summary>
/// Copy the log file to the system clipboard
/// </summary>
public void CopyLog()
{
Clipboard.SetDataObject(this.ActivityLog, true);
}
/// <summary>
/// Handle the OnActivate Caliburn Event
/// </summary>
protected override void OnActivate()
{
this.logService.MessageLogged += this.LogService_MessageLogged;
this.logService.LogReset += LogService_LogReset;
// Refresh the Log Display
this.log.Clear();
foreach (LogMessage logMessage in this.logService.LogMessages)
{
this.log.AppendLine(logMessage.Content);
this.lastReadIndex = logMessage.MessageIndex;
if (this.lastReadIndex > logMessage.MessageIndex)
{
throw new Exception("Log Message Index Error");
}
}
this.OnLogMessageReceived(null);
this.NotifyOfPropertyChange("ActivityLog");
base.OnActivate();
}
/// <summary>
/// Handle the OnDeactivate Caliburn Event
/// </summary>
/// <param name="close">
/// The close.
/// </param>
protected override void OnDeactivate(bool close)
{
this.logService.MessageLogged -= this.LogService_MessageLogged;
this.logService.LogReset -= this.LogService_LogReset;
base.OnDeactivate(close);
}
/// <summary>
/// The log service_ log reset.
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private void LogService_LogReset(object sender, EventArgs e)
{
this.log.Clear();
this.lastReadIndex = 0;
foreach (LogMessage logMessage in this.logService.LogMessages)
{
this.log.AppendLine(logMessage.Content);
this.lastReadIndex = logMessage.MessageIndex;
if (this.lastReadIndex > logMessage.MessageIndex)
{
throw new Exception("Log Message Index Error");
}
}
this.NotifyOfPropertyChange("ActivityLog");
this.OnLogMessageReceived(null);
}
/// <summary>
/// The log service_ message logged.
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private void LogService_MessageLogged(object sender, LogEventArgs e)
{
if (this.lastReadIndex < e.Log.MessageIndex)
{
Execute.OnUIThreadAsync(
() =>
{
this.lastReadIndex = e.Log.MessageIndex;
this.log.AppendLine(e.Log.Content);
this.OnLogMessageReceived(e);
this.NotifyOfPropertyChange("ActivityLog");
});
}
}
/// <summary>
/// Trigger a faster / smoother way of updating the log window.
/// </summary>
/// <param name="e">
/// The e.
/// </param>
protected virtual void OnLogMessageReceived(LogEventArgs e)
{
var onLogMessageReceived = this.LogMessageReceived;
if (onLogMessageReceived != null)
{
onLogMessageReceived.Invoke(this, e);
}
}
}
}
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