/* -*- 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 .

 */

#include <sidebar/ContextChangeBroadcaster.hxx>

#include <vcl/EnumContext.hxx>

#include <com/sun/star/ui/ContextChangeEventObject.hpp>

#include <com/sun/star/ui/ContextChangeEventMultiplexer.hpp>

#include <com/sun/star/frame/ModuleManager.hpp>

#include <osl/diagnose.h>

#include <comphelper/diagnose_ex.hxx>

#include <comphelper/lok.hxx>

#include <comphelper/processfactory.hxx>

#include <sfx2/lokhelper.hxx>

#include <sfx2/viewsh.hxx>

using namespace css;

using namespace css::uno;

namespace sfx2::sidebar {

ContextChangeBroadcaster::ContextChangeBroadcaster()

    : mbIsBroadcasterEnabled(true)

{

}

ContextChangeBroadcaster::~ContextChangeBroadcaster()

{

}

void ContextChangeBroadcaster::Initialize (const OUString& rsContextName)

{

    msContextName = rsContextName;

}

void ContextChangeBroadcaster::Activate (const css::uno::Reference<css::frame::XFrame>& rxFrame)

{

    if (msContextName.getLength() > 0)

        BroadcastContextChange(rxFrame, GetModuleName(rxFrame), msContextName);

}

void ContextChangeBroadcaster::Deactivate (const css::uno::Reference<css::frame::XFrame>& rxFrame)

{

    if (msContextName.getLength() > 0 && !comphelper::LibreOfficeKit::isActive())

    {

        BroadcastContextChange(rxFrame, GetModuleName(rxFrame),

                               vcl::EnumContext::GetContextName(vcl::EnumContext::Context::Default));

    }

}

bool ContextChangeBroadcaster::SetBroadcasterEnabled (const bool bIsEnabled)

{

    const bool bWasEnabled (mbIsBroadcasterEnabled);

    mbIsBroadcasterEnabled = bIsEnabled;

    return bWasEnabled;

}

void ContextChangeBroadcaster::BroadcastContextChange (

    const css::uno::Reference<css::frame::XFrame>& rxFrame,

    const OUString& rsModuleName,

    const OUString& rsContextName)

{

    if ( ! mbIsBroadcasterEnabled)

        return;

    if (rsContextName.getLength() == 0)

        return;

    if ( ! rxFrame.is() || ! rxFrame->getController().is())

    {

        // Frame is (probably) being deleted.  Broadcasting context

        // changes is not necessary anymore.

        return;

    }

    const css::ui::ContextChangeEventObject aEvent(

        rxFrame->getController(),

        rsModuleName,

        rsContextName);

    // notify the LOK too

    if (comphelper::LibreOfficeKit::isActive())

    {

        SfxLokHelper::notifyContextChange(aEvent);

    }

    css::uno::Reference<css::ui::XContextChangeEventMultiplexer> xMultiplexer (

        css::ui::ContextChangeEventMultiplexer::get(

            ::comphelper::getProcessComponentContext()));

    if (xMultiplexer.is())

        xMultiplexer->broadcastContextChangeEvent(aEvent, rxFrame->getController());

}

OUString ContextChangeBroadcaster::GetModuleName (const css::uno::Reference<css::frame::XFrame>& rxFrame)

{

    if ( ! rxFrame.is() || ! rxFrame->getController().is())

        return OUString();

    try

    {

        const Reference<XComponentContext>& xContext (::comphelper::getProcessComponentContext() );

        const Reference<frame::XModuleManager> xModuleManager  = frame::ModuleManager::create( xContext );

        return xModuleManager->identify(rxFrame);

    }

    catch (const Exception&)

    {

        TOOLS_WARN_EXCEPTION("sfx.sidebar", "can not determine module name");

    }

    return OUString();

}

} // end of namespace ::sfx2::sidebar

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