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 * 
 * 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.
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_sfx2.hxx"

#include "helpinterceptor.hxx"
#include "helpdispatch.hxx"
#include "newhelp.hxx"
#include <sfx2/sfxuno.hxx>
#include <tools/urlobj.hxx>
#include <tools/debug.hxx>
#include <com/sun/star/beans/PropertyValue.hpp>
#include <com/sun/star/frame/XNotifyingDispatch.hpp>
#include <cppuhelper/interfacecontainer.h>
#include <vcl/window.hxx>
#include <limits.h>

using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::frame;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::util;
using namespace ::com::sun::star::lang;

extern void AppendConfigToken_Impl( String& rURL, sal_Bool bQuestionMark ); // sfxhelp.cxx

// class HelpInterceptor_Impl --------------------------------------------

HelpInterceptor_Impl::HelpInterceptor_Impl() :

	m_pHistory	( NULL ),
	m_nCurPos	( 0 )

{
}

// -----------------------------------------------------------------------

HelpInterceptor_Impl::~HelpInterceptor_Impl()
{
	for ( sal_uInt16 i = 0; m_pHistory && i < m_pHistory->Count(); ++i )
		delete m_pHistory->GetObject(i);
	delete m_pHistory;
}

// -----------------------------------------------------------------------

void HelpInterceptor_Impl::addURL( const String& rURL )
{
  if ( !m_pHistory )
		m_pHistory = new HelpHistoryList_Impl;
	sal_uIntPtr nCount = m_pHistory->Count();
	if ( nCount && m_nCurPos < ( nCount - 1 ) )
	{
		for ( sal_uIntPtr i = nCount - 1; i > m_nCurPos; i-- )
			delete m_pHistory->Remove(i);
	}
    Reference<XFrame> xFrame(m_xIntercepted, UNO_QUERY);
    Reference<XController> xController;
    if(xFrame.is())
        xController = xFrame->getController();
    Any aViewData;
    if(xController.is() && m_pHistory->Count())
	{
		m_pHistory->GetObject(m_nCurPos)->aViewData = xController->getViewData();
	}

	m_aCurrentURL = rURL;
	Any aEmptyViewData;
    m_pHistory->Insert( new HelpHistoryEntry_Impl( rURL, aEmptyViewData ), LIST_APPEND );
	m_nCurPos = m_pHistory->Count() - 1;
// TODO ?
	if ( m_xListener.is() )
	{
		::com::sun::star::frame::FeatureStateEvent aEvent;
		URL aURL;
	    aURL.Complete = rURL;
		aEvent.FeatureURL = aURL;
        aEvent.Source = (::com::sun::star::frame::XDispatch*)this;
		m_xListener->statusChanged( aEvent );
	}

	m_pWindow->UpdateToolbox();
}

// -----------------------------------------------------------------------

void HelpInterceptor_Impl::setInterception( Reference< XFrame > xFrame )
{
	m_xIntercepted = Reference< XDispatchProviderInterception>( xFrame, UNO_QUERY );

	if ( m_xIntercepted.is() )
		m_xIntercepted->registerDispatchProviderInterceptor( (XDispatchProviderInterceptor*)this );
}

// -----------------------------------------------------------------------

void HelpInterceptor_Impl::SetStartURL( const String& rURL )
{
	DBG_ASSERT( !m_pHistory, "invalid history" );
	if ( !m_pHistory )
	{
		m_pHistory = new HelpHistoryList_Impl;
        Any aEmptyViewData;
        m_pHistory->Insert( new HelpHistoryEntry_Impl( rURL, aEmptyViewData ), ((sal_uIntPtr)0x0) );
		m_nCurPos = m_pHistory->Count() - 1;

		m_pWindow->UpdateToolbox();
	}
	m_aCurrentURL = rURL;
}

sal_Bool HelpInterceptor_Impl::HasHistoryPred() const
{
	return m_pHistory && ( m_nCurPos > 0 );
}

sal_Bool HelpInterceptor_Impl::HasHistorySucc() const
{
	return m_pHistory && ( m_nCurPos < ( m_pHistory->Count() - 1 ) );
}


// -----------------------------------------------------------------------
// XDispatchProvider

Reference< XDispatch > SAL_CALL HelpInterceptor_Impl::queryDispatch(

	const URL& aURL, const ::rtl::OUString& aTargetFrameName, sal_Int32 nSearchFlags )

	throw( RuntimeException )

{
	Reference< XDispatch > xResult;
	if ( m_xSlaveDispatcher.is() )
		xResult = m_xSlaveDispatcher->queryDispatch( aURL, aTargetFrameName, nSearchFlags );

	// INetURLObject aObj( aURL.Complete );
	// sal_Bool bHelpURL = ( aObj.GetProtocol() == INET_PROT_VND_SUN_STAR_HELP );
    sal_Bool bHelpURL = aURL.Complete.toAsciiLowerCase().match(rtl::OUString::createFromAscii("vnd.sun.star.help"),0);

	if ( bHelpURL )
	{
		DBG_ASSERT( xResult.is(), "invalid dispatch" );
	    HelpDispatch_Impl* pHelpDispatch = new HelpDispatch_Impl( *this, xResult );
    	xResult = Reference< XDispatch >( static_cast< ::cppu::OWeakObject* >(pHelpDispatch), UNO_QUERY );
	}

	return xResult;
}

// -----------------------------------------------------------------------

Sequence < Reference < XDispatch > > SAL_CALL HelpInterceptor_Impl::queryDispatches(

	const Sequence< DispatchDescriptor >& aDescripts )

	throw( RuntimeException )

{
	Sequence< Reference< XDispatch > > aReturn( aDescripts.getLength() );
	Reference< XDispatch >* pReturn = aReturn.getArray();
	const DispatchDescriptor* pDescripts = aDescripts.getConstArray();
	for ( sal_Int16 i = 0; i < aDescripts.getLength(); ++i, ++pReturn, ++pDescripts )
	{
		*pReturn = queryDispatch( pDescripts->FeatureURL, pDescripts->FrameName, pDescripts->SearchFlags );
	}
	return aReturn;
}

// -----------------------------------------------------------------------
// XDispatchProviderInterceptor

Reference< XDispatchProvider > SAL_CALL HelpInterceptor_Impl::getSlaveDispatchProvider()

	throw( RuntimeException )

{
	return m_xSlaveDispatcher;
}

// -----------------------------------------------------------------------

void SAL_CALL HelpInterceptor_Impl::setSlaveDispatchProvider( const Reference< XDispatchProvider >& xNewSlave )

	throw( RuntimeException )

{
	m_xSlaveDispatcher = xNewSlave;
}

// -----------------------------------------------------------------------

Reference< XDispatchProvider > SAL_CALL HelpInterceptor_Impl::getMasterDispatchProvider()

	throw( RuntimeException )

{
	return m_xMasterDispatcher;
}

// -----------------------------------------------------------------------

void SAL_CALL HelpInterceptor_Impl::setMasterDispatchProvider( const Reference< XDispatchProvider >& xNewMaster )

	throw( RuntimeException )

{
	m_xMasterDispatcher = xNewMaster;
}

// -----------------------------------------------------------------------
// XInterceptorInfo

Sequence< ::rtl::OUString > SAL_CALL HelpInterceptor_Impl::getInterceptedURLs()

	throw( RuntimeException )

{
	Sequence< ::rtl::OUString > aURLList( 1 );
	aURLList[0] = DEFINE_CONST_UNICODE("vnd.sun.star.help://*");
	return aURLList;;
}

// -----------------------------------------------------------------------
// XDispatch

void SAL_CALL HelpInterceptor_Impl::dispatch(
	const URL& aURL, const Sequence< ::com::sun::star::beans::PropertyValue >& ) throw( RuntimeException )
{
	sal_Bool bBack = ( String( DEFINE_CONST_UNICODE(".uno:Backward") ) == String( aURL.Complete ) );
	if ( bBack || String( DEFINE_CONST_UNICODE(".uno:Forward") ) == String( aURL.Complete ) )
	{
		if ( m_pHistory )
		{
			if(m_pHistory->Count() > m_nCurPos)
			{
				Reference<XFrame> xFrame(m_xIntercepted, UNO_QUERY);
                Reference<XController> xController;
                if(xFrame.is())
                    xController = xFrame->getController();
				if(xController.is())
				{
					m_pHistory->GetObject(m_nCurPos)->aViewData = xController->getViewData();
				}
			}
			
			sal_uIntPtr nPos = ( bBack && m_nCurPos > 0 ) ? --m_nCurPos
													: ( !bBack && m_nCurPos < m_pHistory->Count() - 1 )
													? ++m_nCurPos
													: ULONG_MAX;

			if ( nPos < ULONG_MAX )
			{
				HelpHistoryEntry_Impl* pEntry = m_pHistory->GetObject( nPos );
				if ( pEntry )
                    m_pWindow->loadHelpContent(pEntry->aURL, sal_False); // false => dont add item to history again!
			}

			m_pWindow->UpdateToolbox();
		}
	}
}

// -----------------------------------------------------------------------

void SAL_CALL HelpInterceptor_Impl::addStatusListener(
	const Reference< XStatusListener >& xControl, const URL& ) throw( RuntimeException )
{
	DBG_ASSERT( !m_xListener.is(), "listener already exists" );
	m_xListener = xControl;
}

// -----------------------------------------------------------------------

void SAL_CALL HelpInterceptor_Impl::removeStatusListener(
	const Reference< XStatusListener >&, const URL&) throw( RuntimeException )
{
	m_xListener = 0;
}

// HelpListener_Impl -----------------------------------------------------

HelpListener_Impl::HelpListener_Impl( HelpInterceptor_Impl* pInter )
{
	pInterceptor = pInter;
    pInterceptor->addStatusListener( this, ::com::sun::star::util::URL() );
}

// -----------------------------------------------------------------------

void SAL_CALL HelpListener_Impl::statusChanged( const ::com::sun::star::frame::FeatureStateEvent& Event )

	throw( ::com::sun::star::uno::RuntimeException )

{
	INetURLObject aObj( Event.FeatureURL.Complete );
	aFactory = aObj.GetHost();
	aChangeLink.Call( this );
}

// -----------------------------------------------------------------------

void SAL_CALL HelpListener_Impl::disposing( const ::com::sun::star::lang::EventObject& )

	throw( ::com::sun::star::uno::RuntimeException )

{
    pInterceptor->removeStatusListener( this, ::com::sun::star::util::URL() );
    pInterceptor = NULL;
}
/*-- 05.09.2002 12:17:59---------------------------------------------------

  -----------------------------------------------------------------------*/
HelpStatusListener_Impl::HelpStatusListener_Impl(
        Reference < XDispatch > aDispatch, URL& rURL)
{
    aDispatch->addStatusListener(this, rURL);
}
/*-- 05.09.2002 12:17:59---------------------------------------------------

  -----------------------------------------------------------------------*/
HelpStatusListener_Impl::~HelpStatusListener_Impl()
{
    if(xDispatch.is())
        xDispatch->removeStatusListener(this, com::sun::star::util::URL());
}
/*-- 05.09.2002 12:17:59---------------------------------------------------

  -----------------------------------------------------------------------*/
void HelpStatusListener_Impl::statusChanged(
    const FeatureStateEvent& rEvent ) throw( RuntimeException )
{
    aStateEvent = rEvent;
}
/*-- 05.09.2002 12:18:00---------------------------------------------------

  -----------------------------------------------------------------------*/
void HelpStatusListener_Impl::disposing( const EventObject& ) throw( RuntimeException )
{
    xDispatch->removeStatusListener(this, com::sun::star::util::URL());
    xDispatch = 0;
}