/*
 * Copyright 2012-2014 Sergey Ignatov
 *
 * 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 org.intellij.erlang.completion;

import com.intellij.codeInsight.completion.BasicInsertHandler;
import com.intellij.codeInsight.completion.InsertionContext;
import com.intellij.codeInsight.lookup.LookupElement;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;

public class SingleCharInsertHandler extends BasicInsertHandler<LookupElement> {
  private final char myChar;
  private final boolean mySurroundWithSpaces;

  protected SingleCharInsertHandler(char aChar) {
    myChar = aChar;
    mySurroundWithSpaces = false;
  }

  public SingleCharInsertHandler(char aChar, boolean surroundWithSpaces) {
    myChar = aChar;
    mySurroundWithSpaces = surroundWithSpaces;
  }

  @Override
  public void handleInsert(InsertionContext context, LookupElement item) {
    if (context.getCompletionChar() != myChar) {
      Editor editor = context.getEditor();
      Document document = editor.getDocument();
      context.commitDocument();
      int tailOffset = context.getTailOffset();
      String base = String.valueOf(myChar);
      String toInsert = mySurroundWithSpaces ? " " + base + " " : base;
      document.insertString(tailOffset, toInsert);
      editor.getCaretModel().moveToOffset(tailOffset + toInsert.length());
    }
  }
}