GARbro-mirror/GUI/GarOperation.cs

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//! \file GarOperation.cs
//! \date Fri Feb 03 19:06:52 2017
//! \brief Base class for GARbro file operation.
//
// Copyright (C) 2017 by morkt
//
// 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.
//
using System;
using System.IO;
using GARbro.GUI.Strings;
namespace GARbro.GUI
{
internal class GarOperation
{
internal MainWindow m_main;
internal ProgressDialog m_progress_dialog;
internal Exception m_pending_error;
internal FileExistsDialogResult m_duplicate_action;
internal string m_title;
const int MaxRenameAttempts = 100;
protected GarOperation (MainWindow parent, string dialog_title)
{
m_main = parent;
m_title = dialog_title;
}
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/// <summary>
/// Create file <paramref name="filename"/>. Also create path to file if <paramref name="create_path"/> is true.
/// If file aready exists, popup dialog asking for necessary action.
/// WARNING: path to file should be relative, ArchiveFormat.CreatePath strips drive/root specification.
/// </summary>
protected Stream CreateNewFile (string filename, bool create_path = false)
{
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if (create_path)
filename = GameRes.ArchiveFormat.CreatePath (filename);
FileMode open_mode = FileMode.CreateNew;
if (m_duplicate_action.ApplyToAll &&
m_duplicate_action.Action == ExistingFileAction.Overwrite)
open_mode = FileMode.Create;
try
{
return File.Open (filename, open_mode);
}
catch (IOException) // file already exists?
{
if (!File.Exists (filename) || FileMode.Create == open_mode) // some unforseen I/O error, give up
throw;
}
if (!m_duplicate_action.ApplyToAll)
{
var msg_text = string.Format (guiStrings.TextFileAlreadyExists, Path.GetFileName (filename));
m_duplicate_action = m_main.Dispatcher.Invoke (() => m_main.ShowFileExistsDialog (m_title, msg_text, m_progress_dialog.GetWindowHandle()));
}
switch (m_duplicate_action.Action)
{
default:
case ExistingFileAction.Abort:
throw new OperationCanceledException();
case ExistingFileAction.Skip:
throw new SkipExistingFileException();
case ExistingFileAction.Rename:
return CreateRenamedFile (filename);
case ExistingFileAction.Overwrite:
return File.Open (filename, FileMode.Create);
}
}
/// <summary>
/// Creates new file with specified filename, or, if it's already exists, tries to open
/// files named "FILENAME.1.EXT", "FILENAME.2.EXT" and so on.
/// <exception cref="System.IOException">Throws exception after 100th failed attempt.</exception>
/// </summary>
public static Stream CreateRenamedFile (string filename)
{
var ext = Path.GetExtension (filename);
for (int attempt = 1; ; ++attempt)
{
var name = Path.ChangeExtension (filename, attempt.ToString()+ext);
try
{
return File.Open (name, FileMode.CreateNew);
}
catch (IOException) // file already exists
{
if (MaxRenameAttempts == attempt) // limit number of attempts
throw;
}
}
}
protected FileErrorDialogResult ShowErrorDialog (string error_text)
{
return m_main.Dispatcher.Invoke (() => m_main.ShowErrorDialog (m_title, error_text, m_progress_dialog.GetWindowHandle()));
}
}
internal class SkipExistingFileException : ApplicationException
{
}
}