/**
 * @fileoverview Define the cursor which iterates tokens only, with inflated range.
 * @author Toru Nagashima
 */
"use strict";

//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------

const ForwardTokenCursor = require("./forward-token-cursor");

//------------------------------------------------------------------------------
// Exports
//------------------------------------------------------------------------------

/**
 * The cursor which iterates tokens only, with inflated range.
 * This is for the backward compatibility of padding options.
 */
module.exports = class PaddedTokenCursor extends ForwardTokenCursor {
	/**
	 * Initializes this cursor.
	 * @param {Token[]} tokens The array of tokens.
	 * @param {Comment[]} comments The array of comments.
	 * @param {Object} indexMap The map from locations to indices in `tokens`.
	 * @param {number} startLoc The start location of the iteration range.
	 * @param {number} endLoc The end location of the iteration range.
	 * @param {number} beforeCount The number of tokens this cursor iterates before start.
	 * @param {number} afterCount The number of tokens this cursor iterates after end.
	 */
	constructor(
		tokens,
		comments,
		indexMap,
		startLoc,
		endLoc,
		beforeCount,
		afterCount,
	) {
		super(tokens, comments, indexMap, startLoc, endLoc);
		this.index = Math.max(0, this.index - beforeCount);
		this.indexEnd = Math.min(tokens.length - 1, this.indexEnd + afterCount);
	}
};