// TortoiseSVN - a Windows shell extension for easy version control

// Copyright (C) 2003-2006, 2015, 2021 - TortoiseSVN

// 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,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#pragma once

#include "TSVNPath.h"

/**
* \ingroup Utils
* This singleton class contains a list of items which require a shell-update notification
* This update is done lazily at the end of a run of SVN operations
*/
class CShellUpdater
{
private:
    CShellUpdater();
    ~CShellUpdater();
    // prevent cloning
    CShellUpdater(const CShellUpdater&) = delete;
    CShellUpdater& operator=(const CShellUpdater&) = delete;

public:
    static CShellUpdater& Instance();

public:
    /**
     * Add a single path for updating.
     * The update will happen at some suitable time in the future
     */
    void AddPathForUpdate(const CTSVNPath& path);
    /**
     * Add a list of paths for updating.
     * The update will happen at some suitable time in the future
     */
    void AddPathsForUpdate(const CTSVNPathList& pathList);
    /**
     * Do the update, and clear the list of items waiting
     */
    void Flush();

    static bool RebuildIcons();

private:
    void UpdateShell();

private:
    // The list of paths which will need updating
    CTSVNPathList m_pathsForUpdating;
    // A handle to an event which, when set, tells the ShellExtension to purge its status cache
    HANDLE m_hInvalidationEvent;
};