/*
 * Copyright 2009 The Closure Compiler Authors.
 *
 * 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.google.debugging.sourcemap;

import static com.google.common.base.MoreObjects.toStringHelper;

import com.google.errorprone.annotations.DoNotCall;

/**
 * Represents a position in a source file.
 */
public final class FilePosition {
  private final int line;
  private final int column;

  public FilePosition(int line, int column) {
    this.line = line;
    this.column = column;
  }

  /**
   * Returns the line number of this position.
   * Note: The v1 and v2 source maps use a line number with the first line
   * being 1, whereas the v3 source map corrects this and uses a first line
   * number of 0 to be consistent with the column representation.
   */
  public int getLine() {
    return line;
  }

  /**
   * @return the character index on the line
   * of this position, with the first column being 0.
   */
  public int getColumn() {
    return column;
  }

  @Override
  @DoNotCall // Only for debugging.
  public String toString() {
    // TODO(nickreid): Make this class an @AutoValue and delete this. Too many places were using the
    // public constructor to do so when this method was added.
    return toStringHelper(this).add("line", line).add("column", column).toString();
  }
}
