1 files changed, 158 insertions, 0 deletions
diff --git a/vcl/source/control/quickselectionengine.cxx b/vcl/source/control/quickselectionengine.cxx
new file mode 100644
index 000000000..777e00e0b
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+++ b/vcl/source/control/quickselectionengine.cxx
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+/* -*- 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 )
+            ,aSearchTimeout( "vcl::QuickSelectionEngine_Data aSearchTimeout" )
+        {
+            aSearchTimeout.SetTimeout( 2500 );
+            aSearchTimeout.SetInvokeHandler( LINK( this, QuickSelectionEngine_Data, SearchStringTimeout ) );
+        }
+
+        ~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: */