platform/lang-impl/src/com/intellij/refactoring/IdentifierCharFilter.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed 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 com.intellij.refactoring;

import com.intellij.codeInsight.lookup.CharFilter;
import com.intellij.codeInsight.lookup.Lookup;

/**
 * @author peter
*/
public class IdentifierCharFilter extends CharFilter {

  @Override
  public Result acceptChar(char c, final int prefixLength, final Lookup lookup) {
    if (lookup.isCompletion()) return null;

    if (Character.isJavaIdentifierPart(c)) return Result.ADD_TO_PREFIX;
    return Result.SELECT_ITEM_AND_FINISH_LOOKUP;
  }
}