vcl/source/window/mnemonicengine.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <vcl/mnemonicengine.hxx>
  21
  22 #include <vcl/i18nhelp.hxx>
  23 #include <vcl/svapp.hxx>
  24 #include <vcl/event.hxx>
  25 #include <vcl/settings.hxx>
  26
  27 namespace vcl
  28 {
  29     struct MnemonicEngine_Data
  30     {
  31         IMnemonicEntryList& rEntryList;
  32
  33         explicit MnemonicEngine_Data( IMnemonicEntryList& _rEntryList )
  34             :rEntryList( _rEntryList )
  35         {
  36         }
  37     };
  38
  39     namespace
  40     {
  41         const void* lcl_getEntryForMnemonic( IMnemonicEntryList const & _rEntryList, sal_Unicode _cMnemonic, bool& _rbAmbiguous )
  42         {
  43             _rbAmbiguous = false;
  44
  45             const vcl::I18nHelper& rI18nHelper = Application::GetSettings().GetUILocaleI18nHelper();
  46
  47             OUString sEntryText;
  48             const void* pSearchEntry = _rEntryList.FirstSearchEntry( sEntryText );
  49
  50             const void* pFirstFoundEntry = nullptr;
  51             bool bCheckingAmbiguity = false;
  52             const void* pStartedWith = pSearchEntry;
  53             while ( pSearchEntry )
  54             {
  55                 if ( rI18nHelper.MatchMnemonic( sEntryText, _cMnemonic ) )
  56                 {
  57                     if ( bCheckingAmbiguity )
  58                     {
  59                         // that's the second (at least) entry with this mnemonic
  60                         _rbAmbiguous = true;
  61                         return pFirstFoundEntry;
  62                     }
  63
  64                     pFirstFoundEntry = pSearchEntry;
  65                     bCheckingAmbiguity = true;
  66                 }
  67
  68                 pSearchEntry = _rEntryList.NextSearchEntry( pSearchEntry, sEntryText );
  69                 if ( pSearchEntry == pStartedWith )
  70                     break;
  71             }
  72
  73             return pFirstFoundEntry;
  74         }
  75     }
  76
  77     MnemonicEngine::MnemonicEngine( IMnemonicEntryList& _rEntryList )
  78         :m_pData( new MnemonicEngine_Data( _rEntryList ) )
  79     {
  80     }
  81
  82     bool MnemonicEngine::HandleKeyEvent( const KeyEvent& _rKEvt )
  83     {
  84         bool bAccelKey = _rKEvt.GetKeyCode().IsMod2();
  85         if ( !bAccelKey )
  86             return false;
  87
  88         sal_Unicode cChar = _rKEvt.GetCharCode();
  89         bool bAmbiguous = false;
  90         const void* pEntry = lcl_getEntryForMnemonic( m_pData->rEntryList, cChar, bAmbiguous );
  91         if ( !pEntry )
  92             return false;
  93
  94         m_pData->rEntryList.SelectSearchEntry( pEntry );
  95         if ( !bAmbiguous )
  96             m_pData->rEntryList.ExecuteSearchEntry( pEntry );
  97
  98         // handled
  99         return true;
 100     }
 101
 102     MnemonicEngine::~MnemonicEngine()
 103     {
 104     }
 105
 106 } // namespace vcl
 107
 108 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */