/*
* 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.filtereditor;
import org.apache.directory.studio.ldapbrowser.core.model.filter.LdapFilter;
import org.apache.directory.studio.ldapbrowser.core.model.filter.parser.LdapFilterParser;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.Region;
import org.eclipse.jface.text.source.ICharacterPairMatcher;
import org.eclipse.jface.text.source.ISourceViewer;
/**
* The FilterCharacterPairMatcher implements the ICharacterPairMatcher interface
* to match the peer opening and closing parentesis.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class FilterCharacterPairMatcher implements ICharacterPairMatcher
{
/** The filter parser. */
private LdapFilterParser parser;
/** The anchor. */
private int anchor;
/**
* Creates a new instance of FilterCharacterPairMatcher.
*
* @param sourceViewer the source viewer
* @param parser the filter parser
*/
public FilterCharacterPairMatcher( ISourceViewer sourceViewer, LdapFilterParser parser )
{
this.parser = parser;
clear();
}
/**
* @see org.eclipse.jface.text.source.ICharacterPairMatcher#dispose()
*/
public void dispose()
{
}
/**
* @see org.eclipse.jface.text.source.ICharacterPairMatcher#clear()
*/
public void clear()
{
anchor = LEFT;
}
/**
* @see org.eclipse.jface.text.source.ICharacterPairMatcher#match(org.eclipse.jface.text.IDocument, int)
*/
public IRegion match( IDocument document, int offset )
{
LdapFilter model = parser.getModel();
if ( model != null )
{
LdapFilter filter = parser.getModel().getFilter( offset - 1 );
if ( filter != null && filter.getStartToken() != null && filter.getStopToken() != null )
{
int left = filter.getStartToken().getOffset();
int right = filter.getStopToken().getOffset();
if ( left == offset - 1 )
{
anchor = LEFT;
IRegion region = new Region( left, right - left + 1 );
return region;
}
if ( right == offset - 1 )
{
anchor = RIGHT;
IRegion region = new Region( left, right - left + 1 );
return region;
}
}
}
return null;
}
/**
* @see org.eclipse.jface.text.source.ICharacterPairMatcher#getAnchor()
*/
public int getAnchor()
{
return anchor;
}
}