/*
 * 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.uima.ruta.ide.core.codeassist;

public class TMAutoCompletionToolkit {

  private int wordOffset;

  private int currentOffset;

  private int relativeReplacementStart;

  private String wordPrefix;

  public TMAutoCompletionToolkit(String text, int offset) {
    this.currentOffset = offset;
    wordOffset = getWordOffset(text, offset) + 1;
    wordPrefix = text.substring(wordOffset, offset);
    relativeReplacementStart = offset - wordOffset;

  }

  private int getWordOffset(String text, int offset) {
    for (int i = offset - 1; i > 0; i--) {
      switch (text.charAt(i)) {
        case ' ': {
          return i;
        }
        case '\n': {
          return i;
        }
        case '\r': {
          return i;
        }
        case '\t': {
          return i;
        }
        case '[': {
          return i;
        }
        case ']': {
          return i;
        }
        case '(': {
          return i;
        }
        case ')': {
          return i;
        }
        case '{': {
          return i;
        }
        case '}': {
          return i;
        }
        case ',': {
          return i;
        }
        case ';': {
          return i;
        }
      }
    }
    return -1;
  }

  public int getWordOffset() {
    return this.wordOffset;
  }

  public int getCurrentOffset() {
    return this.currentOffset;
  }

  public int getRelativeReplacementStart() {
    return relativeReplacementStart;
  }

  public String getWordPrefix() {
    return wordPrefix;
  }

}
