/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#pragma once

#include <com/sun/star/ui/dialogs/XAsynchronousExecutableDialog.hpp>
#include <svtools/genericunodialog.hxx>
#include <vcl/svapp.hxx>

using namespace css::uno;

namespace svt
{
typedef cppu::ImplInheritanceHelper<::svt::OGenericUnoDialog,
                                    css::ui::dialogs::XAsynchronousExecutableDialog>
    OGenericUnoAsyncDialogBase;

/** abstract base class for implementing UNO objects representing asynchronous dialogs
    */
template <typename T> class OGenericUnoAsyncDialog : public OGenericUnoAsyncDialogBase
{
    class UnoAsyncDialogEntryGuard
    {
    public:
        UnoAsyncDialogEntryGuard(OGenericUnoAsyncDialog<T>& _rDialog)
            : m_aGuard(_rDialog.GetMutex())
        {
        }

    private:
        ::osl::MutexGuard m_aGuard;
    };

protected:
    std::shared_ptr<T> m_xAsyncDialog;

protected:
    OGenericUnoAsyncDialog(const css::uno::Reference<css::uno::XComponentContext>& _rxContext)
        : OGenericUnoAsyncDialogBase(_rxContext)
    {
    }

public:
    // XAsynchronousExecutableDialog
    void SAL_CALL setDialogTitle(const OUString& aTitle) override
    {
        OGenericUnoDialog::setTitle(aTitle);
    }

    virtual void SAL_CALL startExecuteModal(
        const css::uno::Reference<css::ui::dialogs::XDialogClosedListener>& xListener) override
    {
        SolarMutexGuard aSolarGuard;

        {
            UnoAsyncDialogEntryGuard aGuard(*this);

            if (m_bExecuting)
                throw RuntimeException("already executing the dialog (recursive call)", *this);

            if (!m_xAsyncDialog)
            {
                m_xAsyncDialog = createAsyncDialog(m_xParent);
                OSL_ENSURE(m_xAsyncDialog, "OGenericUnoAsyncDialog::startExecuteModal: "
                                           "createAsyncDialog returned nonsense!");
                if (!m_xAsyncDialog)
                    return;

                // do some initialisations
                if (!m_bTitleAmbiguous)
                    m_xAsyncDialog->set_title(m_sTitle);
            }

            m_bExecuting = true;
        }

        runAsync(xListener);
    }

protected:
    virtual std::shared_ptr<T>
    createAsyncDialog(const css::uno::Reference<css::awt::XWindow>& /*rParent*/)
    {
        return nullptr;
    }

    void destroyAsyncDialog()
    {
        SolarMutexGuard aSolarGuard;
        if (m_xAsyncDialog)
            m_xAsyncDialog.reset();
    }

    virtual void
    runAsync(const css::uno::Reference<css::ui::dialogs::XDialogClosedListener>& /*xListener*/)
    {
    }

    virtual void executedAsyncDialog(std::shared_ptr<T> /*xAsyncDialog*/,
                                     sal_Int32 /*_nExecutionResult*/)
    {
    }
};

} // namespace svt

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