/**************************************************************
 * 
 * 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_vcl.hxx"
#include <vcl/mnemonicengine.hxx>

#include <vcl/i18nhelp.hxx>
#include <vcl/svapp.hxx>
#include <vcl/event.hxx>

//........................................................................
namespace vcl
{
//........................................................................

	//====================================================================
	//= MnemonicEngine_Data
	//====================================================================
    struct MnemonicEngine_Data
    {
        IMnemonicEntryList& rEntryList;

        MnemonicEngine_Data( IMnemonicEntryList& _rEntryList )
            :rEntryList( _rEntryList )
        {
        }
    };

	//--------------------------------------------------------------------
    namespace
    {
        const void* lcl_getEntryForMnemonic( IMnemonicEntryList& _rEntryList, sal_Unicode _cMnemonic, bool& _rbAmbiguous )
        {
            _rbAmbiguous = false;

            const vcl::I18nHelper& rI18nHelper = Application::GetSettings().GetUILocaleI18nHelper();

            String sEntryText;
            const void* pSearchEntry = _rEntryList.FirstSearchEntry( sEntryText );

            const void* pFirstFoundEntry = NULL;
            bool bCheckingAmbiguity = false;
            const void* pStartedWith = pSearchEntry;
            while ( pSearchEntry )
            {
		        if ( rI18nHelper.MatchMnemonic( sEntryText, _cMnemonic ) )
                {
                    if ( bCheckingAmbiguity )
                    {
                        // that's the second (at least) entry with this mnemonic
                        _rbAmbiguous = true;
                        return pFirstFoundEntry;
                    }

                    pFirstFoundEntry = pSearchEntry;
                    bCheckingAmbiguity = true;
                }

                pSearchEntry = _rEntryList.NextSearchEntry( pSearchEntry, sEntryText );
                if ( pSearchEntry == pStartedWith )
                    break;
            }

            return pFirstFoundEntry;
        }
    }

	//====================================================================
	//= MnemonicEngine
	//====================================================================
	//--------------------------------------------------------------------
    MnemonicEngine::MnemonicEngine( IMnemonicEntryList& _rEntryList )
        :m_pData( new MnemonicEngine_Data( _rEntryList ) )
    {
    }

	//--------------------------------------------------------------------
    bool MnemonicEngine::HandleKeyEvent( const KeyEvent& _rKEvt )
    {
	    sal_Bool bAccelKey = _rKEvt.GetKeyCode().IsMod2();
        if ( !bAccelKey )
            return false;

	    sal_Unicode cChar = _rKEvt.GetCharCode();
        bool bAmbiguous = false;
        const void* pEntry = lcl_getEntryForMnemonic( m_pData->rEntryList, cChar, bAmbiguous );
        if ( !pEntry )
            return false;

        m_pData->rEntryList.SelectSearchEntry( pEntry );
        if ( !bAmbiguous )
            m_pData->rEntryList.ExecuteSearchEntry( pEntry );

        // handled
        return true;
    }

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

//........................................................................
} // namespace vcl
//........................................................................