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39 lines
1.6 KiB
39 lines
1.6 KiB
3 years ago
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/**
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* @fileoverview Define the cursor which iterates tokens only, with inflated range.
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* @author Toru Nagashima
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const ForwardTokenCursor = require("./forward-token-cursor");
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//------------------------------------------------------------------------------
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// Exports
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//------------------------------------------------------------------------------
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/**
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* The cursor which iterates tokens only, with inflated range.
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* This is for the backward compatibility of padding options.
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*/
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module.exports = class PaddedTokenCursor extends ForwardTokenCursor {
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/**
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* Initializes this cursor.
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* @param {Token[]} tokens The array of tokens.
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* @param {Comment[]} comments The array of comments.
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* @param {Object} indexMap The map from locations to indices in `tokens`.
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* @param {number} startLoc The start location of the iteration range.
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* @param {number} endLoc The end location of the iteration range.
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* @param {number} beforeCount The number of tokens this cursor iterates before start.
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* @param {number} afterCount The number of tokens this cursor iterates after end.
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*/
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constructor(tokens, comments, indexMap, startLoc, endLoc, beforeCount, afterCount) {
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super(tokens, comments, indexMap, startLoc, endLoc);
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this.index = Math.max(0, this.index - beforeCount);
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this.indexEnd = Math.min(tokens.length - 1, this.indexEnd + afterCount);
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}
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};
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