/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


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

#include "defaulthelpprovider.hxx"
#include "pcrcommon.hxx"
#include "modulepcr.hxx"

/** === begin UNO includes === **/
#include <com/sun/star/ucb/AlreadyInitializedException.hpp>
#include <com/sun/star/lang/IllegalArgumentException.hpp>
#include <com/sun/star/awt/XVclWindowPeer.hpp>
/** === end UNO includes === **/

#include <toolkit/helper/vclunohelper.hxx>
#include <vcl/window.hxx>
#include <tools/diagnose_ex.h>

//------------------------------------------------------------------------
extern "C" void SAL_CALL createRegistryInfo_DefaultHelpProvider()
{
	::pcr::OAutoRegistration< ::pcr::DefaultHelpProvider > aAutoRegistration;
}

//........................................................................
namespace pcr
{
//........................................................................

	/** === begin UNO using === **/
    using ::com::sun::star::uno::Reference;
    using ::com::sun::star::uno::XComponentContext;
    using ::com::sun::star::inspection::XPropertyControl;
    using ::com::sun::star::uno::RuntimeException;
    using ::com::sun::star::uno::Sequence;
    using ::com::sun::star::uno::Any;
    using ::com::sun::star::uno::Exception;
    using ::com::sun::star::inspection::XObjectInspectorUI;
    using ::com::sun::star::uno::XInterface;
    using ::com::sun::star::ucb::AlreadyInitializedException;
    using ::com::sun::star::lang::IllegalArgumentException;
    using ::com::sun::star::uno::UNO_QUERY;
    using ::com::sun::star::uno::UNO_QUERY_THROW;
    using ::com::sun::star::awt::XWindow;
    using ::com::sun::star::awt::XVclWindowPeer;
	/** === end UNO using === **/

	//====================================================================
	//= DefaultHelpProvider
	//====================================================================
	//--------------------------------------------------------------------
    DefaultHelpProvider::DefaultHelpProvider( const Reference< XComponentContext >& _rxContext )
        :m_aContext( _rxContext )
        ,m_bConstructed( false )
    {
    }

	//--------------------------------------------------------------------
    DefaultHelpProvider::~DefaultHelpProvider()
    {
    }

	//------------------------------------------------------------------------
	::rtl::OUString DefaultHelpProvider::getImplementationName_static(  ) throw(RuntimeException)
	{
		return ::rtl::OUString::createFromAscii( "org.openoffice.comp.extensions.DefaultHelpProvider");
	}

	//------------------------------------------------------------------------
	Sequence< ::rtl::OUString > DefaultHelpProvider::getSupportedServiceNames_static(  ) throw(RuntimeException)
	{
		Sequence< ::rtl::OUString > aSupported(1);
		aSupported[0] = ::rtl::OUString::createFromAscii( "com.sun.star.inspection.DefaultHelpProvider" );
		return aSupported;
	}

	//------------------------------------------------------------------------
	Reference< XInterface > SAL_CALL DefaultHelpProvider::Create( const Reference< XComponentContext >& _rxContext )
	{
		return *new DefaultHelpProvider( _rxContext );
	}

    //--------------------------------------------------------------------
    void SAL_CALL DefaultHelpProvider::focusGained( const Reference< XPropertyControl >& _Control ) throw (RuntimeException)
    {
        if ( !m_xInspectorUI.is() )
            throw RuntimeException( ::rtl::OUString(), *this );

        try
        {
            m_xInspectorUI->setHelpSectionText( impl_getHelpText_nothrow( _Control ) );
        }
        catch( const Exception& )
        {
        	DBG_UNHANDLED_EXCEPTION();
        }
    }
    
    //--------------------------------------------------------------------
    void SAL_CALL DefaultHelpProvider::valueChanged( const Reference< XPropertyControl >& /*_Control*/ ) throw (RuntimeException)
    {
        // not interested in
    }

    //--------------------------------------------------------------------
    void SAL_CALL DefaultHelpProvider::initialize( const Sequence< Any >& _arguments ) throw (Exception, RuntimeException)
    {
        if ( m_bConstructed )
            throw AlreadyInitializedException();

        StlSyntaxSequence< Any > arguments( _arguments );
        if ( arguments.size() == 1 )
        {   // constructor: "create( XObjectInspectorUI )"
            Reference< XObjectInspectorUI > xUI( arguments[0], UNO_QUERY );
            create( xUI );
            return;
        }

        throw IllegalArgumentException( ::rtl::OUString(), *this, 0 );
    }

    //--------------------------------------------------------------------
    void DefaultHelpProvider::create( const Reference< XObjectInspectorUI >& _rxUI )
    {
        if ( !_rxUI.is() )
            throw IllegalArgumentException( ::rtl::OUString(), *this, 1 );

        try
        {
            m_xInspectorUI = _rxUI;
            m_xInspectorUI->registerControlObserver( this );
        }
        catch( const Exception& )
        {
        	DBG_UNHANDLED_EXCEPTION();
        }

        m_bConstructed = true;
    }

    //--------------------------------------------------------------------
    Window* DefaultHelpProvider::impl_getVclControlWindow_nothrow( const Reference< XPropertyControl >& _rxControl )
    {
        Window* pControlWindow = NULL;
        OSL_PRECOND( _rxControl.is(), "DefaultHelpProvider::impl_getVclControlWindow_nothrow: illegal control!" );
        if ( !_rxControl.is() )
            return pControlWindow;

        try
        {
            Reference< XWindow > xControlWindow( _rxControl->getControlWindow(), UNO_QUERY_THROW );
            pControlWindow = VCLUnoHelper::GetWindow( xControlWindow );
        }
        catch( const Exception& )
        {
            DBG_UNHANDLED_EXCEPTION();
        }

        return pControlWindow;
    }

    //--------------------------------------------------------------------
    ::rtl::OUString DefaultHelpProvider::impl_getHelpText_nothrow( const Reference< XPropertyControl >& _rxControl )
    {
        ::rtl::OUString sHelpText;
        OSL_PRECOND( _rxControl.is(), "DefaultHelpProvider::impl_getHelpText_nothrow: illegal control!" );
        if ( !_rxControl.is() )
            return sHelpText;

        Window* pControlWindow( impl_getVclControlWindow_nothrow( _rxControl ) );
        OSL_ENSURE( pControlWindow, "DefaultHelpProvider::impl_getHelpText_nothrow: could not determine the VCL window!" );
        if ( !pControlWindow )
            return sHelpText;

        sHelpText = pControlWindow->GetHelpText();
        return sHelpText;
    }
//........................................................................
} // namespace pcr
//........................................................................