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authorMinteck <contact@minteck.org>2023-02-23 19:34:56 +0100
committerMinteck <contact@minteck.org>2023-02-23 19:34:56 +0100
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-/* -*- 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;