source: branches/eraser6/Eraser/LogForm.cs @ 974

/* 
 * $Id$
 * Copyright 2008 The Eraser Project
 * Original Author: Joel Low <lowjoel@users.sourceforge.net>
 * Modified By:
 * 
 * This file is part of Eraser.
 * 
 * Eraser is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * Eraser is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * A copy of the GNU General Public License can be found at
 * <http://www.gnu.org/licenses/>.
 */

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using Eraser.Manager;
using System.Globalization;
using Eraser.Util;

namespace Eraser
{
    public partial class LogForm : Form
    {
        public LogForm(Task task)
        {
            InitializeComponent();
            UxThemeAPI.UpdateControlTheme(this);
            this.task = task;

            //Update the title
            Text = string.Format(CultureInfo.InvariantCulture, "{0} - {1}", Text, task.UIText);

            //Add all the existing log messages
            this.log.BeginUpdate();
            LogSessionDictionary log = task.Log.Entries;
            foreach (DateTime sessionTime in log.Keys)
            {
                this.log.Groups.Add(new ListViewGroup(S._("Session: {0:F}", sessionTime)));
                foreach (LogEntry entry in log[sessionTime])
                    task_Logged(this, new LogEventArgs(entry));
            }

            //Register our event handler to get live log messages
            task.Log.Logged += task_Logged;
            this.log.EndUpdate();
            EnableButtons();
        }

        private void LogForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            task.Log.Logged -= task_Logged;
        }

        private void task_Logged(object sender, LogEventArgs e)
        {
            if (InvokeRequired)
            {
                //Todo: I get crashes here... but alas, I can't fix it!
                try
                {
                    Invoke(new EventHandler<LogEventArgs>(task_Logged), sender, e);
                }
                catch (ObjectDisposedException)
                {
                }
                catch (InvalidOperationException)
                {
                }
                return;
            }

            ListViewItem item = log.Items.Add(e.LogEntry.Timestamp.ToString("F", CultureInfo.CurrentCulture));
            item.SubItems.Add(e.LogEntry.Level.ToString());
            item.SubItems.Add(e.LogEntry.Message);
            if (log.Groups.Count != 0)
                item.Group = log.Groups[log.Groups.Count - 1];

            switch (e.LogEntry.Level)
            {
                case LogLevel.Fatal:
                    item.ForeColor = Color.Red;
                    break;
                case LogLevel.Error:
                    item.ForeColor = Color.OrangeRed;
                    break;
                case LogLevel.Warning:
                    item.ForeColor = Color.Orange;
                    break;
            }

            //Enable the clear and copy log buttons only if we have entries to copy.
            EnableButtons();
        }

        private void clear_Click(object sender, EventArgs e)
        {
            task.Log.Clear();
            log.Items.Clear();
            EnableButtons();
        }

        private void copy_Click(object sender, EventArgs e)
        {
            StringBuilder text = new StringBuilder();
            LogSessionDictionary logEntries = task.Log.Entries;
            foreach (DateTime sessionTime in logEntries.Keys)
            {
                text.AppendLine(S._("Session: {0:F}", sessionTime));
                foreach (LogEntry entry in logEntries[sessionTime])
                {
                    text.AppendFormat("{0}  {1} {2}\n",
                        entry.Timestamp.ToString("F", CultureInfo.CurrentCulture).Replace("\"", "\"\""),
                        entry.Level.ToString(), entry.Message);
                }
            }

            if (text.Length > 0)
                Clipboard.SetText(text.ToString(), TextDataFormat.CommaSeparatedValue);
        }

        private void close_Click(object sender, EventArgs e)
        {
            Close();
        }

        /// <summary>
        /// Enables/disables buttons based on the current system state.
        /// </summary>
        private void EnableButtons()
        {
            clear.Enabled = copy.Enabled = task.Log.Entries.Count > 0;
        }

        /// <summary>
        /// The task which this log is displaying entries for
        /// </summary>
        private Task task;
    }
}