LuaCharFilter.java

/*
 * Copyright 2010 Jon S Akhtar (Sylvanaar)
 *
 * 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.sylvanaar.idea.Lua.editor.completion;

import com.intellij.codeInsight.lookup.CharFilter;
import com.intellij.codeInsight.lookup.Lookup;
import com.intellij.psi.PsiFile;
import com.sylvanaar.idea.Lua.LuaFileType;
import org.jetbrains.annotations.Nullable;

/**
 * Created by IntelliJ IDEA.
 * User: Jon S Akhtar
 * Date: Nov 21, 2010
 * Time: 6:53:07 PM
 */
public class LuaCharFilter extends CharFilter {
    @Nullable
    public Result acceptChar(char c, int prefixLength, Lookup lookup) {
        if (!lookup.isCompletion()) return null;

        final PsiFile psiFile = lookup.getPsiFile();
        
        if (psiFile != null && !psiFile.getViewProvider().getLanguages().contains(LuaFileType.LUA_LANGUAGE))
            return null;

        if (Character.isJavaIdentifierPart(c) || c == ':' || c == '[' || c == ']' || c == '.') {
            return Result.ADD_TO_PREFIX;
        }

        switch(c){
          case ',':
          case ';':
          case '=':
//          case ' ':
          case '(':
          case '{':
            return Result.SELECT_ITEM_AND_FINISH_LOOKUP;

          default:
            return Result.HIDE_LOOKUP;
        }
    }

}