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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.jamon.parser;

import org.jamon.api.Location;
import org.jamon.compiler.ParserErrorImpl;

/**
 * A {@code TagEndDetector} which will end either on a "%>" sequence or a hash sign ("#").
 */
public class HashEndDetector implements TagEndDetector {
  @Override
  public int checkEnd(char character) {
    switch (character) {
      case '%':
        seenPercent = true;
        return 0;
      case '>':
        if (seenPercent) {
          endedWithHash = false;
          return 2;
        }
        else {
          seenPercent = false;
          return 0;
        }
      case '#':
        endedWithHash = true;
        return 1;
      default:
        seenPercent = false;
        return 0;
    }
  }

  @Override
  public ParserErrorImpl getEofError(Location startLocation) {
    return new ParserErrorImpl(startLocation, AbstractBodyParser.PERCENT_GREATER_THAN_EOF_ERROR);
  }

  @Override
  public void resetEndMatch() {}

  /**
   * @return {@code true} if the final character read was a hash ("#"), false if it was a "%>"
   *         sequence.
   */
  public boolean endedWithHash() {
    return endedWithHash;
  }

  private boolean endedWithHash = false;
  private boolean seenPercent = false;
}