/*
* 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.
*
*/
package org.apache.directory.studio.ldapbrowser.common.widgets.search;
import java.util.ArrayList;
import java.util.List;
import org.apache.directory.studio.ldapbrowser.common.filtereditor.FilterAutoEditStrategy;
import org.apache.directory.studio.ldapbrowser.common.filtereditor.FilterAutoEditStrategy.AutoEditParameters;
import org.apache.directory.studio.ldapbrowser.core.model.filter.parser.LdapFilterParser;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.VerifyEvent;
import org.eclipse.swt.events.VerifyListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Combo;
/**
* The FilterWidgetAutoEditStrategyAdapter is used to integrate the {@link FilterAutoEditStrategy}
* into an combo field.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev$, $Date$
*/
public class FilterWidgetAutoEditStrategyAdapter
{
/** The auto edit strategy. */
private FilterAutoEditStrategy autoEditStrategy;
/** The combo. */
private Combo combo;
/** The old texts. */
private List<String> oldTexts;
/** The verify events. */
private List<VerifyEvent> verifyEvents;
/** The in apply combo customization flag. */
private boolean inApplyComboCustomization;
/**
* Creates a new instance of FilterWidgetAutoEditStrategyAdapter.
*
* @param combo the combo
* @param parser the filter parser
*/
public FilterWidgetAutoEditStrategyAdapter( Combo combo, LdapFilterParser parser )
{
this.combo = combo;
this.oldTexts = new ArrayList<String>();
this.verifyEvents = new ArrayList<VerifyEvent>();
this.inApplyComboCustomization = false;
this.autoEditStrategy = new FilterAutoEditStrategy( parser );
combo.addVerifyListener( new VerifyListener()
{
public void verifyText( VerifyEvent e )
{
prepareComboCustomization( e );
}
} );
combo.addModifyListener( new ModifyListener()
{
public void modifyText( ModifyEvent e )
{
applyComboCustomization( e );
}
} );
}
/**
* Prepares combo customization.
*
* @param e the verify event
*/
public void prepareComboCustomization( VerifyEvent e )
{
if ( !inApplyComboCustomization )
{
String oldText = combo.getText();
//parser.parse( oldText );
if ( !oldTexts.isEmpty() )
{
oldTexts.clear();
verifyEvents.clear();
}
oldTexts.add( oldText );
verifyEvents.add( e );
}
}
/**
* Applies combo customization.
*
* @param e the modify event
*/
public void applyComboCustomization( ModifyEvent e )
{
if ( !inApplyComboCustomization && !verifyEvents.isEmpty() )
{
String oldText = oldTexts.remove( 0 );
VerifyEvent verifyEvent = verifyEvents.remove( 0 );
inApplyComboCustomization = true;
// extract modification details
String text = verifyEvent.text;
int offset = verifyEvent.start <= verifyEvent.end ? verifyEvent.start : verifyEvent.end;
int length = verifyEvent.start <= verifyEvent.end ? verifyEvent.end - verifyEvent.start : verifyEvent.start
- verifyEvent.end;
// apply auto edit strategy
AutoEditParameters autoEditParameters = new AutoEditParameters( text, offset, length, -1, true );
autoEditStrategy.customizeAutoEditParameters( oldText, autoEditParameters );
// get current selection
Point oldSelection = combo.getSelection();
// compose new text
String newText = ""; //$NON-NLS-1$
newText += oldText.substring( 0, autoEditParameters.offset );
newText += autoEditParameters.text;
newText += oldText.substring( autoEditParameters.offset + autoEditParameters.length, oldText.length() );
// determine new cursor position
Point newSelection;
if ( autoEditParameters.caretOffset != -1 )
{
int x = autoEditParameters.caretOffset;
newSelection = new Point( x, x );
}
else
{
newSelection = new Point( oldSelection.x, oldSelection.y );
}
// set new text and cursor position
if ( verifyEvents.isEmpty() )
{
combo.setText( newText );
combo.setSelection( newSelection );
}
inApplyComboCustomization = false;
}
}
}