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C# / CSharp Open Source » Business Application » DC 
DC » DCSharp » GUI » Util.cs
/*
 * Copyright (C) 2006 Eskil Bylund
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 * 
 * This program 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.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

using System;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;

using Gtk;
using Mono.Unix;

using DCSharp.Backend.Connections;
using DCSharp.Backend.Managers;
using DCSharp.Backend.Objects;
using DCSharp.Xml;

namespace DCSharp.GUI{
  public class Util
  {
    #region Icon
    
    private static Widget widget = new Invisible();
    
#if !GNOME
    private static string[][] Extensions = {
      new string[] {"au", "mp2", "mp3", "mid", "ogg", "rm", "sm", "wav"},
      new string[] {"arc", "arj", "gz", "lzh", "pak", "rar", "z", "zip"},
      new string[] {"doc", "pdf", "ps", "tex", "txt", "wri"},
      new string[] {"bat", "com", "exe", "pm"},
      new string[] {"bmp", "gif", "jpg", "jpeg", "pcx", "png", "psd", "wmf"},
      new string[] {"avi", "asf", "mov", "mpeg", "mpg"}
    };
#endif

    private static string[][] icons = {
      new string[] {"audio-x-generic", "gnome-mime-audio"},
      new string[] {"package-x-generic", "gnome-package"},
      new string[] {"text-x-generic", "gtk-file"},
      new string[] {"application-x-executable", "gnome-fs-executable"},
      new string[] {"image-x-generic", "gnome-mime-image"},
      new string[] {"video-x-generic", "gnome-mime-video"},
      new string[] {"folder", "gnome-fs-directory"}
    };

    /*
    public enum SearchFileType
    {
      Any = 1,
      Audio,
      Package,
      Document,
      Executable,
      Image,
      Video,
      Directory
    }
    */
    public static Gdk.Pixbuf GetFileTypeIcon(SearchFileType type)
    {
      if (type != SearchFileType.Any)
      {
        return GetIcon(icons[(int)type - 2]);
      }
      
      // FIXME: Need another icon for this one
      return widget.RenderIcon(Stock.About, IconSize.Menu, null);
    }
    
    public static Gdk.Pixbuf GetIconFromPath(string path)
    {
      return GetIconFromPath(path, 16);
    }
    
    public static Gdk.Pixbuf GetIconFromPath(string path, int size)
    {
      return IconManager.GetIcon(GetIconName(path), size);
    }
    
    public static string GetIconName(string fileName)
    {
#if GNOME
      string mimeType = Gnome.Vfs.Mime.TypeFromName(fileName);
      
      Gnome.IconLookupResultFlags result;
      string iconName = Gnome.Icon.Lookup(IconTheme.Default, null, null,
        null, null, mimeType, Gnome.IconLookupFlags.None, out result);
      
      // TODO: Replace default icon from Gnome.Icon.Lookup
      return iconName;
#else
      string extension = System.IO.Path.GetExtension(fileName);
      if (extension.Length == 0)
      {
        return "gtk-file";
      }
      
      int index = 0;
      extension = extension.ToLower().Substring(1);
      foreach (string[] extensions in Extensions)
      {
        if (Array.IndexOf(extensions, extension) > -1)
        {
          foreach (string iconName in icons[index])
          {
            if (IconTheme.Default.HasIcon(iconName))
            {
              return iconName;
            }
          }
        }
        index++;
      }
      return "gtk-file";
#endif
    }
    
    public static Gdk.Pixbuf GetUserIcon(Identity identity)
    {
      if (identity.User.IsOnline)
      {
        if (identity.Op)
        {
          return IconManager.UserOp;
        }
        else if (identity.Active)
        {
          return IconManager.UserOnline;
        }
        return IconManager.UserPassive;
      }
      return IconManager.UserOffline;
    }
    
    public static Gdk.Pixbuf GetUserIcon(User user)
    {
      return user.IsOnline ? IconManager.UserOnline : IconManager.UserOffline;
    }
    
    private static Gdk.Pixbuf GetIcon(string[] iconNames)
    {
      return GetIcon(iconNames, 16);
    }
    
    private static Gdk.Pixbuf GetIcon(string[] iconNames, int size)
    {
      foreach (string iconName in iconNames)
      {
        if (IconTheme.Default.HasIcon(iconName))
        {
          return IconManager.GetIcon(iconName, size);
        }
      }
      return null;
    }
    
    #endregion
    
    #region Path
    
    private static char[] PathSeparatorChars = new char [] {
      Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar, '\\', '/'
    };
    
    public static string GetDirectory(string path)
    {
      int index = path.LastIndexOfAny(PathSeparatorChars);
      
      if (index > 0)
      {
        return path.Substring(0, index);
      }
      return path;
    }
    
    public static string GetFile(string path)
    {
      int index = path.LastIndexOfAny(PathSeparatorChars);
      
      if (index > 0)
      {
        return path.Substring(index + 1);
      }
      return path;
    }
    
    #endregion
    
    public static string FormatFileSize(long bytes)
    {
      double size = bytes;
      bool decimals = true;
      
      int count = 0;
      while (size >= 1024)
      {
        size /= 1024;
        count++;
      }
      
      string units = null;
      switch(count)
      {
        case 0:
          units = "byte";
          decimals = false;
          break;
        case 1:
          units = "KiB";
          break;
        case 2:
          units = "MiB";
          break;
        case 3:
          units = "GiB";
          break;
        case 4:
          units = "TiB";
          break;
        case 5:
          units = "PiB";
          break;
        case 6:
          units = "EiB";
          break;
        default:
          throw new OverflowException();
      }
      
      string format = decimals ? "{0:0.0} {1}" : "{0:0} {1}";
      
      return String.Format(format, size, units);
    }
    
#if GNOME
    public static void OpenFile(string file)
    {
      OpenUrl(Gnome.Vfs.Uri.GetUriFromLocalPath(file));
    }
    
    public static void OpenUrl(string url)
    {
      try
      {
        Gnome.Url.Show(url);
      }
      catch
      {
        string text = Catalog.GetString("Could not open \"{0}\"");
        text = String.Format(text, Gnome.Vfs.Unescape.StringForDisplay(url));
        
        MessageDialog dialog = new MessageDialog(text, null, null,
          MessageType.Error, GUI.MainWindow.Window);
        dialog.AddButton(Stock.Ok, ResponseType.Ok);
        
        dialog.Run();
        dialog.Destroy();
      }  
    }
#endif
    
    public static string GetStatus(TransferFileInfo transfer)
    {
      if (transfer is DownloadFileInfo)
      {
        return GetStatus((DownloadFileInfo)transfer);
      }
      else if (transfer is UploadFileInfo)
      {
        return GetStatus((UploadFileInfo)transfer);
      }
      return null;
    }
    
    public static string GetStatus(DownloadFileInfo download)
    {
      if (download.Active)
      {
        return Catalog.GetString("Receiving");
      }
      else if (download.Size > 0 &&
        download.Position == download.Size)
      {
        return Catalog.GetString("Done");
      }
      else if (!Runtime.DownloadManager.Contains(download))
      {
        return Catalog.GetString("Aborted");
      }
      else
      {
        SourceInfo[] sourceInfos = download.SourceInfos;
        
        int users = sourceInfos.Length;
        foreach (SourceInfo source in sourceInfos)
        {
          if (!source.Available)
          {
            users--;
          }
        }
        if (users == 0)
        {
          return Catalog.GetString("No users to download from");
        }
        
        int usersOnline = GetOnlineUsers(download);
        if (usersOnline > 0)
        {
          if (users == 1)
          {
            return Catalog.GetString("Waiting (User online)");
          }
          return String.Format(
            Catalog.GetString("Waiting ({0} of {1} users online)"),
            usersOnline, users);
        }
        else
        {
          if (users == 1)
          {
            return Catalog.GetString("User offline");
          }
          else if (users == 2)
          {
            return Catalog.GetString("Both users offline");
          }
          return Catalog.GetString("All users offline");
        }
      }
    }
    
    public static string GetStatus(UploadFileInfo upload)
    {
      if (upload.Active)
      {
        return Catalog.GetString("Sending");
      }
      else if (upload.Size > 0 &&
        upload.Position == upload.Size)
      {
        return Catalog.GetString("Done");
      }
      else
      {
        return Catalog.GetString("Aborted");
      }
    }
    
    public static int GetOnlineUsers(DownloadFileInfo download)
    {
      int usersOnline = 0;
      foreach (SourceInfo source in download.SourceInfos)
      {
        if (source.Available && source.User.IsOnline)
        {
          usersOnline++;
        }
      }
      return usersOnline;
    }
    
    public static void SetText(Entry entry, string text)
    {
      entry.Text = text != null ? text : String.Empty;
    }
    
    public static string GetHubName(HubConnection connection)
    {
      lock (Runtime.FavoriteHubManager.SyncRoot)
      {
        foreach (FavoriteHubInfo hubInfo in Runtime.FavoriteHubManager.Hubs)
        {
          if (hubInfo.Hostname == connection.Hostname)
          {
            return hubInfo.Name;
          }
        }
        return connection.Hostname;
      }
    }
    
    public static void SetVisibleColumns(TreeViewColumn[] columns,
      int visibleColumns)
    {
      int i = 0;
      foreach (TreeViewColumn column in columns)
      {
        column.Visible = (visibleColumns & (1 << i)) > 0;
        i++;
      }
    }
    
    public static int GetVisibleColumns(TreeViewColumn[] columns)
    {
      int i = 0;
      int visible = 0;
      foreach (TreeViewColumn column in columns)
      {
        visible |= column.Visible ? (1 << i) : 0;
        i++;
      }
      return visible;
    }
    
    public static void RequestFileList(Identity user)
    {
      RequestFileList(user, null);
    }
    
    public static void RequestFileList(Identity user, string pathToSelect)
    {
      Debug.Assert(user != null);
      
      DownloadFileInfo download = Runtime.DownloadManager.AddFileList(
        user.User);
      GUI.ShowFileList(null, user, download, pathToSelect);
    }
  }
}
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