/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2008 by Sun Microsystems, Inc.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * $RCSfile: contextmenuhelper.cxx,v $
 * $Revision: 1.5 $
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org 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 Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svtools.hxx"

#include "contextmenuhelper.hxx"
#include <svtools/menuoptions.hxx>
#include <svtools/miscopt.hxx>

#include <com/sun/star/frame/XDispatch.hpp>
#include <com/sun/star/frame/XDispatchProvider.hpp>
#include <com/sun/star/frame/XModuleManager.hpp>
#include <com/sun/star/frame/XStatusListener.hpp>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>
#include <com/sun/star/ui/XUIConfigurationManagerSupplier.hpp>
#include <com/sun/star/ui/XUIConfigurationManager.hpp>
#include <com/sun/star/ui/XModuleUIConfigurationManagerSupplier.hpp>
#include <com/sun/star/ui/ImageType.hpp>
#include <com/sun/star/beans/PropertyValue.hpp>

#include <osl/conditn.hxx> 
#include <cppuhelper/weak.hxx>
#include <comphelper/processfactory.hxx>
#include <vos/mutex.hxx>
#include <vcl/svapp.hxx>
#include <vcl/image.hxx>
#include <toolkit/unohlp.hxx>
#include <toolkit/awt/vclxwindow.hxx>
#include <toolkit/awt/vclxmenu.hxx>
 
using namespace ::com::sun::star;

namespace svt
{

// internal helper class to retrieve status updates
class StateEventHelper : public ::com::sun::star::frame::XStatusListener,
                         public ::cppu::OWeakObject
{
    public:
        StateEventHelper( const uno::Reference< frame::XDispatchProvider >& xDispatchProvider,
                          const uno::Reference< util::XURLTransformer >& xURLTransformer,
                          const rtl::OUString& aCommandURL );
        virtual ~StateEventHelper();

        bool isCommandEnabled();

		// XInterface
		virtual uno::Any SAL_CALL queryInterface( const uno::Type& aType ) throw ( uno::RuntimeException);
		virtual void SAL_CALL acquire() throw ();
		virtual void SAL_CALL release() throw ();
 
        // XEventListener
	    virtual void SAL_CALL disposing(const lang::EventObject& Source) throw( uno::RuntimeException );
	    
        // XStatusListener
	    virtual void SAL_CALL statusChanged(const frame::FeatureStateEvent& Event) throw( uno::RuntimeException );
     
    private:
        StateEventHelper();
        StateEventHelper( const StateEventHelper& );
        StateEventHelper& operator=( const StateEventHelper& );

        bool                                       m_bCurrentCommandEnabled;
        ::rtl::OUString                            m_aCommandURL;
        uno::Reference< frame::XDispatchProvider > m_xDispatchProvider;
        uno::Reference< util::XURLTransformer >    m_xURLTransformer;
        osl::Condition                             m_aCondition;         
};

StateEventHelper::StateEventHelper(
    const uno::Reference< frame::XDispatchProvider >& xDispatchProvider,
    const uno::Reference< util::XURLTransformer >& xURLTransformer,
    const rtl::OUString& rCommandURL ) :
    m_bCurrentCommandEnabled( true ),
    m_aCommandURL( rCommandURL ),
    m_xDispatchProvider( xDispatchProvider ),
    m_xURLTransformer( xURLTransformer )
{
    m_aCondition.reset();
}

StateEventHelper::~StateEventHelper()
{}

uno::Any SAL_CALL StateEventHelper::queryInterface(
    const uno::Type& aType )
throw ( uno::RuntimeException )
{
    uno::Any a = ::cppu::queryInterface( 
				aType,
				SAL_STATIC_CAST( XStatusListener*, this ));
	
	if( a.hasValue() )
		return a;
		
    return ::cppu::OWeakObject::queryInterface( aType );
}

void SAL_CALL StateEventHelper::acquire()
throw ()
{
    ::cppu::OWeakObject::acquire();
}

void SAL_CALL StateEventHelper::release()
throw ()
{
    ::cppu::OWeakObject::release();
}

void SAL_CALL StateEventHelper::disposing( 
    const lang::EventObject& )
throw ( uno::RuntimeException )
{
    vos::OGuard	aSolarGuard( Application::GetSolarMutex() );
    m_xDispatchProvider.clear();
    m_xURLTransformer.clear();
    m_aCondition.set();
}

void SAL_CALL StateEventHelper::statusChanged( 
    const frame::FeatureStateEvent& Event )
throw ( uno::RuntimeException )
{
    vos::OGuard	aSolarGuard( Application::GetSolarMutex() );
    m_bCurrentCommandEnabled = Event.IsEnabled;
    m_aCondition.set();
}

bool StateEventHelper::isCommandEnabled()
{
    // Be sure that we cannot die during condition wait
    uno::Reference< frame::XStatusListener > xSelf( 
        SAL_STATIC_CAST( frame::XStatusListener*, this ));
   
    uno::Reference< frame::XDispatch > xDispatch;
    util::URL                          aTargetURL;
    {
        vos::OGuard	aSolarGuard( Application::GetSolarMutex() );
        if ( m_xDispatchProvider.is() && m_xURLTransformer.is() )
        {
            ::rtl::OUString aSelf( RTL_CONSTASCII_USTRINGPARAM( "_self" ));
            
            aTargetURL.Complete = m_aCommandURL;
            m_xURLTransformer->parseStrict( aTargetURL );

            try
            {
                xDispatch = m_xDispatchProvider->queryDispatch( aTargetURL, aSelf, 0 );
            }
            catch ( uno::RuntimeException& )
            {
                throw;
            }
            catch ( uno::Exception& )
            {
            }
        }
    }

    bool bResult( false );
    if ( xDispatch.is() )
    {
        try
        {
            // add/remove ourself to retrieve status by callback
            xDispatch->addStatusListener( xSelf, aTargetURL );
            xDispatch->removeStatusListener( xSelf, aTargetURL );
            
            // wait for anwser
            m_aCondition.wait();
        }
        catch ( uno::RuntimeException& )
        {
            throw;
        }
        catch ( uno::Exception& )
        {
        }

        vos::OGuard	aSolarGuard( Application::GetSolarMutex() );
        bResult = m_bCurrentCommandEnabled;
    }
    
    return bResult;
}

/*************************************************************************/
    
struct ExecuteInfo
{
    uno::Reference< frame::XDispatch >    xDispatch;
    util::URL                             aTargetURL;
    uno::Sequence< beans::PropertyValue > aArgs;
};
    
static const PopupMenu* lcl_FindPopupFromItemId( const PopupMenu* pPopupMenu, sal_uInt16 nItemId )
{
    if ( pPopupMenu )
    {
        sal_uInt16 nCount = pPopupMenu->GetItemCount();
        for ( sal_uInt16 i = 0; i < nCount; i++ )
        {
            sal_uInt16 nId = pPopupMenu->GetItemId( i );
            if ( nId == nItemId )
                return pPopupMenu;
            else
            {
                const PopupMenu* pResult( 0 );
                
                const PopupMenu* pSubPopup = pPopupMenu->GetPopupMenu( i );
                if ( pPopupMenu )
                    pResult = lcl_FindPopupFromItemId( pSubPopup, nItemId );
                if ( pResult != 0 )
                    return pResult;
            }
        }
    }

    return NULL;
}

static ::rtl::OUString lcl_GetItemCommandRecursive( const PopupMenu* pPopupMenu, sal_uInt16 nItemId )
{
    const PopupMenu* pPopup = lcl_FindPopupFromItemId( pPopupMenu, nItemId );
    if ( pPopup )
        return pPopup->GetItemCommand( nItemId );
    else
        return ::rtl::OUString();
}

/*************************************************************************/

ContextMenuHelper::ContextMenuHelper(
    const uno::Reference< frame::XFrame >& xFrame, 
    bool bAutoRefresh ) :
    m_xWeakFrame( xFrame ),
    m_aSelf( RTL_CONSTASCII_USTRINGPARAM( "_self" )),
    m_bAutoRefresh( bAutoRefresh ),
    m_bUICfgMgrAssociated( false )
{
}

ContextMenuHelper::~ContextMenuHelper()
{
}

void 
ContextMenuHelper::completeAndExecute( 
    const Point& aPos, 
    PopupMenu& rPopupMenu )
{
    vos::OGuard	aSolarGuard( Application::GetSolarMutex() );
    
    associateUIConfigurationManagers();
    completeMenuProperties( &rPopupMenu );
    executePopupMenu( aPos, &rPopupMenu );
    resetAssociations();
}

void 
ContextMenuHelper::completeAndExecute( 
    const Point& aPos, 
    const uno::Reference< awt::XPopupMenu >& xPopupMenu )
{
    vos::OGuard	aSolarGuard( Application::GetSolarMutex() );

    VCLXMenu* pXMenu = VCLXMenu::GetImplementation( xPopupMenu );
    if ( pXMenu )
    {
        PopupMenu* pPopupMenu = dynamic_cast< PopupMenu* >( pXMenu->GetMenu() );
        // as dynamic_cast can return zero check pointer
        if ( pPopupMenu )
        {
            associateUIConfigurationManagers();
            completeMenuProperties( pPopupMenu );
            executePopupMenu( aPos, pPopupMenu );
            resetAssociations();
        }
    }
}

uno::Reference< awt::XPopupMenu > 
ContextMenuHelper::create( 
    const ::rtl::OUString& /*aPopupMenuResourceId*/ )
{
    // NOT IMPLEMENTED YET!
    return uno::Reference< awt::XPopupMenu >();
}

bool 
ContextMenuHelper::createAndExecute( 
    const Point& /*aPos*/, 
    const ::rtl::OUString& /*aPopupMenuResourceId*/ )
{
    // NOT IMPLEMENTED YET!
    return false;
}

// private member

void 
ContextMenuHelper::executePopupMenu( 
    const Point& rPos,
    PopupMenu* pMenu )
{
    if ( pMenu )
    {
        uno::Reference< frame::XFrame > xFrame( m_xWeakFrame );
        if ( xFrame.is() )
        {
            uno::Reference< awt::XWindow > xWindow( xFrame->getContainerWindow() );
            if ( xWindow.is() )
            {
                Window* pParent = VCLUnoHelper::GetWindow( xWindow );
                sal_uInt16 nResult = pMenu->Execute( pParent, rPos );

                if ( nResult > 0 )
                {
                    ::rtl::OUString aCommand = lcl_GetItemCommandRecursive( pMenu, nResult );
                    if ( aCommand.getLength() > 0 )
                        dispatchCommand( xFrame, aCommand );
                }
            }
        }
    }
}

bool
ContextMenuHelper::dispatchCommand( 
    const uno::Reference< ::frame::XFrame >& rFrame,
    const ::rtl::OUString& aCommandURL )
{
    if ( !m_xURLTransformer.is() )
    {
        m_xURLTransformer = uno::Reference< util::XURLTransformer >( 
            ::comphelper::getProcessServiceFactory()->createInstance(
                rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                    "com.sun.star.util.URLTransformer" ))),
            uno::UNO_QUERY );
    }
    
    util::URL aTargetURL;
    uno::Reference< frame::XDispatch > xDispatch;
    if ( m_xURLTransformer.is() )
    {
        aTargetURL.Complete = aCommandURL;
        m_xURLTransformer->parseStrict( aTargetURL );

        uno::Reference< frame::XDispatchProvider > xDispatchProvider( 
            rFrame, uno::UNO_QUERY );
        if ( xDispatchProvider.is() )
        {
            try
            {
                xDispatch = xDispatchProvider->queryDispatch( aTargetURL, m_aSelf, 0 );
            }
            catch ( uno::RuntimeException& )
            {
                throw;
            }
            catch ( uno::Exception& )
            {
            }
        }
    }

    if ( xDispatch.is() )
    {
        ExecuteInfo* pExecuteInfo = new ExecuteInfo;
        pExecuteInfo->xDispatch    = xDispatch;
        pExecuteInfo->aTargetURL   = aTargetURL;
        pExecuteInfo->aArgs        = m_aDefaultArgs;

        Application::PostUserEvent( STATIC_LINK(0, ContextMenuHelper , ExecuteHdl_Impl), pExecuteInfo );
        return true;
    }

    return false;
}

// retrieves and stores references to our user-interface
// configuration managers, like image manager, ui command
// description manager.
bool
ContextMenuHelper::associateUIConfigurationManagers()
{
    uno::Reference< frame::XFrame > xFrame( m_xWeakFrame );
    if ( !m_bUICfgMgrAssociated && xFrame.is() )
    {
        // clear current state
        m_xDocImageMgr.clear();
        m_xModuleImageMgr.clear();
        m_xUICommandLabels.clear();

        try
        {
            uno::Reference < frame::XController > xController;
            uno::Reference < frame::XModel > xModel;
            xController = xFrame->getController();
            if ( xController.is() )
                xModel = xController->getModel();

            if ( xModel.is() )
            {
                // retrieve document image manager form model
                uno::Reference< ui::XUIConfigurationManagerSupplier > xSupplier( xModel, uno::UNO_QUERY );
                if ( xSupplier.is() )
                {
                    uno::Reference< ui::XUIConfigurationManager > xDocUICfgMgr( 
                        xSupplier->getUIConfigurationManager(), uno::UNO_QUERY );
                    m_xDocImageMgr = uno::Reference< ui::XImageManager >( 
                        xDocUICfgMgr->getImageManager(), uno::UNO_QUERY );
                }
            }

            uno::Reference< frame::XModuleManager > xModuleManager(
                ::comphelper::getProcessServiceFactory()->createInstance(
                    rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                        "com.sun.star.frame.ModuleManager" ))),
                uno::UNO_QUERY );
            
            uno::Reference< ui::XImageManager > xModuleImageManager;
            rtl::OUString                       aModuleId;
            if ( xModuleManager.is() )
            {
                // retrieve module image manager
                aModuleId = xModuleManager->identify( xFrame );

                uno::Reference< ui::XModuleUIConfigurationManagerSupplier > xModuleCfgMgrSupplier(
                    ::comphelper::getProcessServiceFactory()->createInstance(
                        rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                            "com.sun.star.ui.ModuleUIConfigurationManagerSupplier" ))),
                        uno::UNO_QUERY );
                if ( xModuleCfgMgrSupplier.is() )
                {
                    uno::Reference< ui::XUIConfigurationManager > xUICfgMgr( 
                        xModuleCfgMgrSupplier->getUIConfigurationManager( aModuleId ));
                    if ( xUICfgMgr.is() )
                    {
                        m_xModuleImageMgr = uno::Reference< ui::XImageManager >( 
                            xUICfgMgr->getImageManager(), uno::UNO_QUERY );
                    }
                }
            }

            uno::Reference< container::XNameAccess > xNameAccess(
                ::comphelper::getProcessServiceFactory()->createInstance(
                    rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                        "com.sun.star.frame.UICommandDescription" ))),
                    uno::UNO_QUERY );
            if ( xNameAccess.is() )
            {
                try
                {
                    uno::Any a = xNameAccess->getByName( aModuleId );
                    a >>= m_xUICommandLabels;
                }
                catch ( container::NoSuchElementException& )
                {
                }
            }
        }
        catch ( uno::RuntimeException& )
        {
            throw;
        }
        catch ( uno::Exception& )
        {
            m_bUICfgMgrAssociated = true;
            return false;
        }
        m_bUICfgMgrAssociated = true;
    }

    return true;
}

Image 
ContextMenuHelper::getImageFromCommandURL( 
    const ::rtl::OUString& aCmdURL,
    bool                   bHiContrast ) const
{
    Image     aImage;
    sal_Int16 nImageType( ui::ImageType::COLOR_NORMAL|
                          ui::ImageType::SIZE_DEFAULT );
    if ( bHiContrast )
        nImageType |= ui::ImageType::COLOR_HIGHCONTRAST;
    
    uno::Sequence< uno::Reference< graphic::XGraphic > > aGraphicSeq;
    uno::Sequence< ::rtl::OUString > aImageCmdSeq( 1 );
    aImageCmdSeq[0] = aCmdURL;
    
    if ( m_xDocImageMgr.is() )
    {
        try
        {
            aGraphicSeq = m_xDocImageMgr->getImages( nImageType, aImageCmdSeq );
            uno::Reference< graphic::XGraphic > xGraphic = aGraphicSeq[0];
            aImage = Image( xGraphic );

            if ( !!aImage )
                return aImage;
        }
        catch ( uno::RuntimeException& )
        {
            throw;
        }
        catch ( uno::Exception& )
        {
        }
    }
    
    if ( m_xModuleImageMgr.is() )
    {
        try
        {
            aGraphicSeq = m_xModuleImageMgr->getImages( nImageType, aImageCmdSeq );
            uno::Reference< ::com::sun::star::graphic::XGraphic > xGraphic = aGraphicSeq[0];
	    aImage = Image( xGraphic );

            if ( !!aImage )
                return aImage;
        }
        catch ( uno::RuntimeException& )
        {
            throw;
        }
        catch ( uno::Exception& )
        {
        }
    }

    return aImage;
}

rtl::OUString
ContextMenuHelper::getLabelFromCommandURL( 
    const ::rtl::OUString& aCmdURL ) const
{
    ::rtl::OUString aLabel;
    
    if ( m_xUICommandLabels.is() )
    {
        try
        {
            if ( aCmdURL.getLength() > 0 )
            {
                rtl::OUString aStr;
                uno::Sequence< beans::PropertyValue > aPropSeq;
                uno::Any a( m_xUICommandLabels->getByName( aCmdURL ));
                if ( a >>= aPropSeq )
                {
                    for ( sal_Int32 i = 0; i < aPropSeq.getLength(); i++ )
                    {
                        if ( aPropSeq[i].Name.equalsAscii( "Label" ))
                        {
                            aPropSeq[i].Value >>= aStr;
                            break;
                        }
                    }
                }
                aLabel = aStr;
            }
        }
        catch ( uno::RuntimeException& )
        {
        }
        catch ( uno::Exception& )
        {
        }
    }

    return aLabel;
}

void 
ContextMenuHelper::completeMenuProperties( 
    Menu* pMenu )
{
    // Retrieve some settings necessary to display complete context
    // menu correctly.
    const StyleSettings& rSettings = Application::GetSettings().GetStyleSettings();
	bool  bShowMenuImages( SvtMenuOptions().IsMenuIconsEnabled() );
	bool  bIsHiContrast( rSettings.GetMenuColor().IsDark() );
	
    if ( pMenu )
    {
        uno::Reference< frame::XFrame > xFrame( m_xWeakFrame );
        uno::Reference< frame::XDispatchProvider > xDispatchProvider( xFrame, uno::UNO_QUERY );
        
        if ( !m_xURLTransformer.is() )
        {
            m_xURLTransformer = uno::Reference< util::XURLTransformer >( 
                ::comphelper::getProcessServiceFactory()->createInstance(
                    rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                        "com.sun.star.util.URLTransformer" ))),
                uno::UNO_QUERY );
        }
        
        for ( sal_uInt16 nPos = 0; nPos < pMenu->GetItemCount(); nPos++ )
	    {
		    sal_uInt16 nId        = pMenu->GetItemId( nPos );
		    PopupMenu* pPopupMenu = pMenu->GetPopupMenu( nId );
            if ( pPopupMenu )
                completeMenuProperties( pPopupMenu );
            if ( pMenu->GetItemType( nPos ) != MENUITEM_SEPARATOR )
		    {
                ::rtl::OUString aCmdURL( pMenu->GetItemCommand( nId ));
			    
                if ( bShowMenuImages )
			    {
				    Image aImage;
                    if ( aCmdURL.getLength() > 0 )
					    aImage = getImageFromCommandURL( aCmdURL, bIsHiContrast );
                    pMenu->SetItemImage( nId, aImage );
			    }
			    else
				    pMenu->SetItemImage( nId, Image() );

                if ( pMenu->GetItemText( nId ).Len() == 0 )
                {
                    ::rtl::OUString aLabel( getLabelFromCommandURL( aCmdURL ));
                    pMenu->SetItemText( nId, aLabel );
                }

                // Use helper to retrieve state of the command URL
				StateEventHelper* pHelper = new StateEventHelper( 
													xDispatchProvider, 
													m_xURLTransformer,
													aCmdURL );

				uno::Reference< frame::XStatusListener > xHelper( pHelper );
                pMenu->EnableItem( nId, pHelper->isCommandEnabled() );
		    }
	    }
    }
}


IMPL_STATIC_LINK_NOINSTANCE( ContextMenuHelper, ExecuteHdl_Impl, ExecuteInfo*, pExecuteInfo )
{
    // Release solar mutex to prevent deadlocks with clipboard thread    
    const sal_uInt32 nRef = Application::ReleaseSolarMutex();
    try
    {
        // Asynchronous execution as this can lead to our own destruction while we are
        // on the stack. Stack unwinding would access the destroyed context menu.
        pExecuteInfo->xDispatch->dispatch( pExecuteInfo->aTargetURL, pExecuteInfo->aArgs );
    }
    catch ( uno::Exception& )
    {
    }

    // Acquire solar mutex again
    Application::AcquireSolarMutex( nRef );
    delete pExecuteInfo;
    return 0;
}

} // namespace svt
