/**
 * @license
 * Copyright (C) 2016 The Android Open Source Project
 *
 * 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.
 */

/**
 * @constructor
 * @param {GrDiffLine.Type} type
 * @param {number|string=} opt_beforeLine
 * @param {number|string=} opt_afterLine
 */
export function GrDiffLine(type, opt_beforeLine, opt_afterLine) {
  this.type = type;

  /** @type {number|string} */
  this.beforeNumber = opt_beforeLine || 0;

  /** @type {number|string} */
  this.afterNumber = opt_afterLine || 0;

  /** @type {boolean} */
  this.hasIntralineInfo = false;

  /** @type {!Array<GrDiffLine.Highlights>} */
  this.highlights = [];

  /** @type {?Array<Object>} ?Array<!GrDiffGroup> */
  this.contextGroups = null;

  this.text = '';
}

/** @enum {string} */
GrDiffLine.Type = {
  ADD: 'add',
  BOTH: 'both',
  BLANK: 'blank',
  CONTEXT_CONTROL: 'contextControl',
  REMOVE: 'remove',
};

/**
 * A line highlight object consists of three fields:
 * - contentIndex: The index of the chunk `content` field (the line
 *   being referred to).
 * - startIndex: Index of the character where the highlight should begin.
 * - endIndex: (optional) Index of the character where the highlight should
 *   end. If omitted, the highlight is meant to be a continuation onto the
 *   next line.
 *
 * @typedef {{
 *  contentIndex: number,
 *  startIndex: number,
 *  endIndex: number
 * }}
 */
GrDiffLine.Highlights;

GrDiffLine.FILE = 'FILE';

GrDiffLine.BLANK_LINE = new GrDiffLine(GrDiffLine.Type.BLANK);