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Diffstat (limited to 'vcl/source/control/quickselectionengine.cxx')
| -rw-r--r-- | vcl/source/control/quickselectionengine.cxx | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/vcl/source/control/quickselectionengine.cxx b/vcl/source/control/quickselectionengine.cxx new file mode 100644 index 000000000..e3b060896 --- /dev/null +++ b/vcl/source/control/quickselectionengine.cxx @@ -0,0 +1,161 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * 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 . + */ + +#include <vcl/quickselectionengine.hxx> +#include <vcl/event.hxx> +#include <vcl/timer.hxx> +#include <vcl/i18nhelp.hxx> +#include <vcl/svapp.hxx> +#include <vcl/settings.hxx> +#include <sal/log.hxx> + +#include <optional> + +namespace vcl +{ + + struct QuickSelectionEngine_Data + { + ISearchableStringList& rEntryList; + OUString sCurrentSearchString; + ::std::optional< sal_Unicode > aSingleSearchChar; + Timer aSearchTimeout; + + explicit QuickSelectionEngine_Data( ISearchableStringList& _entryList ) + :rEntryList( _entryList ) + ,sCurrentSearchString() + ,aSingleSearchChar() + ,aSearchTimeout() + { + aSearchTimeout.SetTimeout( 2500 ); + aSearchTimeout.SetInvokeHandler( LINK( this, QuickSelectionEngine_Data, SearchStringTimeout ) ); + aSearchTimeout.SetDebugName( "vcl::QuickSelectionEngine_Data aSearchTimeout" ); + } + + ~QuickSelectionEngine_Data() + { + aSearchTimeout.Stop(); + } + + DECL_LINK( SearchStringTimeout, Timer*, void ); + }; + + namespace + { + void lcl_reset( QuickSelectionEngine_Data& _data ) + { + _data.sCurrentSearchString.clear(); + _data.aSingleSearchChar.reset(); + _data.aSearchTimeout.Stop(); + } + } + + IMPL_LINK_NOARG( QuickSelectionEngine_Data, SearchStringTimeout, Timer*, void ) + { + lcl_reset( *this ); + } + + static StringEntryIdentifier findMatchingEntry( const OUString& _searchString, QuickSelectionEngine_Data const & _engineData ) + { + const vcl::I18nHelper& rI18nHelper = Application::GetSettings().GetLocaleI18nHelper(); + // TODO: do we really need the Window's settings here? The original code used it ... + + OUString sEntryText; + // get the "current + 1" entry + StringEntryIdentifier pSearchEntry = _engineData.rEntryList.CurrentEntry( sEntryText ); + if ( pSearchEntry ) + pSearchEntry = _engineData.rEntryList.NextEntry( pSearchEntry, sEntryText ); + // loop 'til we find another matching entry + StringEntryIdentifier pStartedWith = pSearchEntry; + while ( pSearchEntry ) + { + if ( rI18nHelper.MatchString( _searchString, sEntryText ) ) + break; + + pSearchEntry = _engineData.rEntryList.NextEntry( pSearchEntry, sEntryText ); + if ( pSearchEntry == pStartedWith ) + pSearchEntry = nullptr; + } + + return pSearchEntry; + } + + QuickSelectionEngine::QuickSelectionEngine( ISearchableStringList& _entryList ) + :m_pData( new QuickSelectionEngine_Data( _entryList ) ) + { + } + + QuickSelectionEngine::~QuickSelectionEngine() + { + } + + bool QuickSelectionEngine::HandleKeyEvent( const KeyEvent& _keyEvent ) + { + sal_Unicode c = _keyEvent.GetCharCode(); + + if ( ( c >= 32 ) && ( c != 127 ) && !_keyEvent.GetKeyCode().IsMod2() ) + { + m_pData->sCurrentSearchString += OUStringChar(c); + SAL_INFO( "vcl", "QuickSelectionEngine::HandleKeyEvent: searching for " << m_pData->sCurrentSearchString ); + + if ( m_pData->sCurrentSearchString.getLength() == 1 ) + { // first character in the search -> remember + m_pData->aSingleSearchChar = c; + } + else if ( m_pData->sCurrentSearchString.getLength() > 1 ) + { + if ( !!m_pData->aSingleSearchChar && ( *m_pData->aSingleSearchChar != c ) ) + // we already have a "single char", but the current one is different -> reset + m_pData->aSingleSearchChar.reset(); + } + + OUString aSearchTemp( m_pData->sCurrentSearchString ); + + StringEntryIdentifier pMatchingEntry = findMatchingEntry( aSearchTemp, *m_pData ); + SAL_INFO( "vcl", "QuickSelectionEngine::HandleKeyEvent: found " << pMatchingEntry ); + if ( !pMatchingEntry && (aSearchTemp.getLength() > 1) && !!m_pData->aSingleSearchChar ) + { + // if there's only one letter in the search string, use a different search mode + aSearchTemp = OUString(*m_pData->aSingleSearchChar); + pMatchingEntry = findMatchingEntry( aSearchTemp, *m_pData ); + } + + if ( pMatchingEntry ) + { + m_pData->rEntryList.SelectEntry( pMatchingEntry ); + m_pData->aSearchTimeout.Start(); + } + else + { + lcl_reset( *m_pData ); + } + + return true; + } + return false; + } + + void QuickSelectionEngine::Reset() + { + lcl_reset( *m_pData ); + } + +} // namespace vcl + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |