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File Name : mapping-list.js

/* -*- Mode: js; js-indent-level: 2; -*- */
/*
 * Copyright 2014 Mozilla Foundation and contributors
 * Licensed under the New BSD license. See LICENSE or:
 * http://opensource.org/licenses/BSD-3-Clause
 */

var util = require('./util');

/**
 * Determine whether mappingB is after mappingA with respect to generated
 * position.
 */
function generatedPositionAfter(mappingA, mappingB) {
  // Optimized for most common case
  var lineA = mappingA.generatedLine;
  var lineB = mappingB.generatedLine;
  var columnA = mappingA.generatedColumn;
  var columnB = mappingB.generatedColumn;
  return lineB > lineA || lineB == lineA && columnB >= columnA ||
         util.compareByGeneratedPositionsInflated(mappingA, mappingB) <= 0;
}

/**
 * A data structure to provide a sorted view of accumulated mappings in a
 * performance conscious manner. It trades a neglibable overhead in general
 * case for a large speedup in case of mappings being added in order.
 */
function MappingList() {
  this._array = [];
  this._sorted = true;
  // Serves as infimum
  this._last = {generatedLine: -1, generatedColumn: 0};
}

/**
 * Iterate through internal items. This method takes the same arguments that
 * `Array.prototype.forEach` takes.
 *
 * NOTE: The order of the mappings is NOT guaranteed.
 */
MappingList.prototype.unsortedForEach =
  function MappingList_forEach(aCallback, aThisArg) {
    this._array.forEach(aCallback, aThisArg);
  };

/**
 * Add the given source mapping.
 *
 * @param Object aMapping
 */
MappingList.prototype.add = function MappingList_add(aMapping) {
  if (generatedPositionAfter(this._last, aMapping)) {
    this._last = aMapping;
    this._array.push(aMapping);
  } else {
    this._sorted = false;
    this._array.push(aMapping);
  }
};

/**
 * Returns the flat, sorted array of mappings. The mappings are sorted by
 * generated position.
 *
 * WARNING: This method returns internal data without copying, for
 * performance. The return value must NOT be mutated, and should be treated as
 * an immutable borrow. If you want to take ownership, you must make your own
 * copy.
 */
MappingList.prototype.toArray = function MappingList_toArray() {
  if (!this._sorted) {
    this._array.sort(util.compareByGeneratedPositionsInflated);
    this._sorted = true;
  }
  return this._array;
};

exports.MappingList = MappingList;

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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	uburnpff/uburnpff	0755	2023-12-14 10:08:09
..	dir	-	uburnpff/uburnpff	0755	2023-12-14 10:08:09
array-set.js	text/plain	3.12 KB	uburnpff/uburnpff	0644	2023-12-14 10:08:09
base64-vlq.js	text/plain	4.6 KB	uburnpff/uburnpff	0644	2023-12-14 10:08:09
base64.js	text/plain	1.5 KB	uburnpff/uburnpff	0644	2023-12-14 10:08:09
binary-search.js	text/plain	4.15 KB	uburnpff/uburnpff	0644	2023-12-14 10:08:09
mapping-list.js	text/plain	2.28 KB	uburnpff/uburnpff	0644	2023-12-14 10:08:09
quick-sort.js	text/plain	3.97 KB	uburnpff/uburnpff	0644	2023-12-14 10:08:09
source-map-consumer.js	text/plain	40.51 KB	uburnpff/uburnpff	0644	2023-12-14 10:08:09
source-map-generator.js	text/plain	14.02 KB	uburnpff/uburnpff	0644	2023-12-14 10:08:09
source-node.js	text/plain	13.48 KB	uburnpff/uburnpff	0644	2023-12-14 10:08:09
util.js	text/plain	15.04 KB	uburnpff/uburnpff	0644	2023-12-14 10:08:09