Index: frontend/node_modules/source-map/lib/array-set.js =================================================================== --- frontend/node_modules/source-map/lib/array-set.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/array-set.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,100 @@ +/* -*- Mode: js; js-indent-level: 2; -*- */ +/* + * Copyright 2011 Mozilla Foundation and contributors + * Licensed under the New BSD license. See LICENSE or: + * http://opensource.org/licenses/BSD-3-Clause + */ + +/** + * A data structure which is a combination of an array and a set. Adding a new + * member is O(1), testing for membership is O(1), and finding the index of an + * element is O(1). Removing elements from the set is not supported. Only + * strings are supported for membership. + */ +class ArraySet { + constructor() { + this._array = []; + this._set = new Map(); + } + + /** + * Static method for creating ArraySet instances from an existing array. + */ + static fromArray(aArray, aAllowDuplicates) { + const set = new ArraySet(); + for (let i = 0, len = aArray.length; i < len; i++) { + set.add(aArray[i], aAllowDuplicates); + } + return set; + } + + /** + * Return how many unique items are in this ArraySet. If duplicates have been + * added, than those do not count towards the size. + * + * @returns Number + */ + size() { + return this._set.size; + } + + /** + * Add the given string to this set. + * + * @param String aStr + */ + add(aStr, aAllowDuplicates) { + const isDuplicate = this.has(aStr); + const idx = this._array.length; + if (!isDuplicate || aAllowDuplicates) { + this._array.push(aStr); + } + if (!isDuplicate) { + this._set.set(aStr, idx); + } + } + + /** + * Is the given string a member of this set? + * + * @param String aStr + */ + has(aStr) { + return this._set.has(aStr); + } + + /** + * What is the index of the given string in the array? + * + * @param String aStr + */ + indexOf(aStr) { + const idx = this._set.get(aStr); + if (idx >= 0) { + return idx; + } + throw new Error('"' + aStr + '" is not in the set.'); + } + + /** + * What is the element at the given index? + * + * @param Number aIdx + */ + at(aIdx) { + if (aIdx >= 0 && aIdx < this._array.length) { + return this._array[aIdx]; + } + throw new Error("No element indexed by " + aIdx); + } + + /** + * Returns the array representation of this set (which has the proper indices + * indicated by indexOf). Note that this is a copy of the internal array used + * for storing the members so that no one can mess with internal state. + */ + toArray() { + return this._array.slice(); + } +} +exports.ArraySet = ArraySet; Index: frontend/node_modules/source-map/lib/base64-vlq.js =================================================================== --- frontend/node_modules/source-map/lib/base64-vlq.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/base64-vlq.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,94 @@ +/* -*- Mode: js; js-indent-level: 2; -*- */ +/* + * Copyright 2011 Mozilla Foundation and contributors + * Licensed under the New BSD license. See LICENSE or: + * http://opensource.org/licenses/BSD-3-Clause + * + * Based on the Base 64 VLQ implementation in Closure Compiler: + * https://code.google.com/p/closure-compiler/source/browse/trunk/src/com/google/debugging/sourcemap/Base64VLQ.java + * + * Copyright 2011 The Closure Compiler Authors. All rights reserved. + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +const base64 = require("./base64"); + +// A single base 64 digit can contain 6 bits of data. For the base 64 variable +// length quantities we use in the source map spec, the first bit is the sign, +// the next four bits are the actual value, and the 6th bit is the +// continuation bit. The continuation bit tells us whether there are more +// digits in this value following this digit. +// +// Continuation +// | Sign +// | | +// V V +// 101011 + +const VLQ_BASE_SHIFT = 5; + +// binary: 100000 +const VLQ_BASE = 1 << VLQ_BASE_SHIFT; + +// binary: 011111 +const VLQ_BASE_MASK = VLQ_BASE - 1; + +// binary: 100000 +const VLQ_CONTINUATION_BIT = VLQ_BASE; + +/** + * Converts from a two-complement value to a value where the sign bit is + * placed in the least significant bit. For example, as decimals: + * 1 becomes 2 (10 binary), -1 becomes 3 (11 binary) + * 2 becomes 4 (100 binary), -2 becomes 5 (101 binary) + */ +function toVLQSigned(aValue) { + return aValue < 0 ? (-aValue << 1) + 1 : (aValue << 1) + 0; +} + +/** + * Returns the base 64 VLQ encoded value. + */ +exports.encode = function base64VLQ_encode(aValue) { + let encoded = ""; + let digit; + + let vlq = toVLQSigned(aValue); + + do { + digit = vlq & VLQ_BASE_MASK; + vlq >>>= VLQ_BASE_SHIFT; + if (vlq > 0) { + // There are still more digits in this value, so we must make sure the + // continuation bit is marked. + digit |= VLQ_CONTINUATION_BIT; + } + encoded += base64.encode(digit); + } while (vlq > 0); + + return encoded; +}; Index: frontend/node_modules/source-map/lib/base64.js =================================================================== --- frontend/node_modules/source-map/lib/base64.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/base64.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,19 @@ +/* -*- Mode: js; js-indent-level: 2; -*- */ +/* + * Copyright 2011 Mozilla Foundation and contributors + * Licensed under the New BSD license. See LICENSE or: + * http://opensource.org/licenses/BSD-3-Clause + */ + +const intToCharMap = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split(""); + +/** + * Encode an integer in the range of 0 to 63 to a single base 64 digit. + */ +exports.encode = function (number) { + if (0 <= number && number < intToCharMap.length) { + return intToCharMap[number]; + } + throw new TypeError("Must be between 0 and 63: " + number); +}; Index: frontend/node_modules/source-map/lib/binary-search.js =================================================================== --- frontend/node_modules/source-map/lib/binary-search.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/binary-search.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,113 @@ +/* -*- Mode: js; js-indent-level: 2; -*- */ +/* + * Copyright 2011 Mozilla Foundation and contributors + * Licensed under the New BSD license. See LICENSE or: + * http://opensource.org/licenses/BSD-3-Clause + */ + +exports.GREATEST_LOWER_BOUND = 1; +exports.LEAST_UPPER_BOUND = 2; + +/** + * Recursive implementation of binary search. + * + * @param aLow Indices here and lower do not contain the needle. + * @param aHigh Indices here and higher do not contain the needle. + * @param aNeedle The element being searched for. + * @param aHaystack The non-empty array being searched. + * @param aCompare Function which takes two elements and returns -1, 0, or 1. + * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or + * 'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the + * closest element that is smaller than or greater than the one we are + * searching for, respectively, if the exact element cannot be found. + */ +function recursiveSearch(aLow, aHigh, aNeedle, aHaystack, aCompare, aBias) { + // This function terminates when one of the following is true: + // + // 1. We find the exact element we are looking for. + // + // 2. We did not find the exact element, but we can return the index of + // the next-closest element. + // + // 3. We did not find the exact element, and there is no next-closest + // element than the one we are searching for, so we return -1. + const mid = Math.floor((aHigh - aLow) / 2) + aLow; + const cmp = aCompare(aNeedle, aHaystack[mid], true); + if (cmp === 0) { + // Found the element we are looking for. + return mid; + } else if (cmp > 0) { + // Our needle is greater than aHaystack[mid]. + if (aHigh - mid > 1) { + // The element is in the upper half. + return recursiveSearch(mid, aHigh, aNeedle, aHaystack, aCompare, aBias); + } + + // The exact needle element was not found in this haystack. Determine if + // we are in termination case (3) or (2) and return the appropriate thing. + if (aBias === exports.LEAST_UPPER_BOUND) { + return aHigh < aHaystack.length ? aHigh : -1; + } + return mid; + } + + // Our needle is less than aHaystack[mid]. + if (mid - aLow > 1) { + // The element is in the lower half. + return recursiveSearch(aLow, mid, aNeedle, aHaystack, aCompare, aBias); + } + + // we are in termination case (3) or (2) and return the appropriate thing. + if (aBias == exports.LEAST_UPPER_BOUND) { + return mid; + } + return aLow < 0 ? -1 : aLow; +} + +/** + * This is an implementation of binary search which will always try and return + * the index of the closest element if there is no exact hit. This is because + * mappings between original and generated line/col pairs are single points, + * and there is an implicit region between each of them, so a miss just means + * that you aren't on the very start of a region. + * + * @param aNeedle The element you are looking for. + * @param aHaystack The array that is being searched. + * @param aCompare A function which takes the needle and an element in the + * array and returns -1, 0, or 1 depending on whether the needle is less + * than, equal to, or greater than the element, respectively. + * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or + * 'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the + * closest element that is smaller than or greater than the one we are + * searching for, respectively, if the exact element cannot be found. + * Defaults to 'binarySearch.GREATEST_LOWER_BOUND'. + */ +exports.search = function search(aNeedle, aHaystack, aCompare, aBias) { + if (aHaystack.length === 0) { + return -1; + } + + let index = recursiveSearch( + -1, + aHaystack.length, + aNeedle, + aHaystack, + aCompare, + aBias || exports.GREATEST_LOWER_BOUND + ); + if (index < 0) { + return -1; + } + + // We have found either the exact element, or the next-closest element to + // the one we are searching for. However, there may be more than one such + // element. Make sure we always return the smallest of these. + while (index - 1 >= 0) { + if (aCompare(aHaystack[index], aHaystack[index - 1], true) !== 0) { + break; + } + --index; + } + + return index; +}; Index: frontend/node_modules/source-map/lib/mapping-list.js =================================================================== --- frontend/node_modules/source-map/lib/mapping-list.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/mapping-list.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,83 @@ +/* -*- 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 + */ + +const util = require("./util"); + +/** + * Determine whether mappingB is after mappingA with respect to generated + * position. + */ +function generatedPositionAfter(mappingA, mappingB) { + // Optimized for most common case + const lineA = mappingA.generatedLine; + const lineB = mappingB.generatedLine; + const columnA = mappingA.generatedColumn; + const 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 negligible overhead in general + * case for a large speedup in case of mappings being added in order. + */ +class MappingList { + constructor() { + 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. + */ + unsortedForEach(aCallback, aThisArg) { + this._array.forEach(aCallback, aThisArg); + } + + /** + * Add the given source mapping. + * + * @param Object aMapping + */ + 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. + */ + toArray() { + if (!this._sorted) { + this._array.sort(util.compareByGeneratedPositionsInflated); + this._sorted = true; + } + return this._array; + } +} + +exports.MappingList = MappingList; Index: frontend/node_modules/source-map/lib/read-wasm-browser.js =================================================================== --- frontend/node_modules/source-map/lib/read-wasm-browser.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/read-wasm-browser.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,23 @@ +"use strict"; + +let mappingsWasm = null; + +module.exports = function readWasm() { + if (typeof mappingsWasm === "string") { + return fetch(mappingsWasm).then(response => response.arrayBuffer()); + } + if (mappingsWasm instanceof ArrayBuffer) { + return Promise.resolve(mappingsWasm); + } + + throw new Error( + "You must provide the string URL or ArrayBuffer contents " + + "of lib/mappings.wasm by calling " + + "SourceMapConsumer.initialize({ 'lib/mappings.wasm': ... }) " + + "before using SourceMapConsumer" + ); +}; + +module.exports.initialize = input => { + mappingsWasm = input; +}; Index: frontend/node_modules/source-map/lib/read-wasm.js =================================================================== --- frontend/node_modules/source-map/lib/read-wasm.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/read-wasm.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,27 @@ +"use strict"; + +// Note: This file is replaced with "read-wasm-browser.js" when this module is +// bundled with a packager that takes package.json#browser fields into account. + +const fs = require("fs"); +const path = require("path"); + +module.exports = function readWasm() { + return new Promise((resolve, reject) => { + const wasmPath = path.join(__dirname, "mappings.wasm"); + fs.readFile(wasmPath, null, (error, data) => { + if (error) { + reject(error); + return; + } + + resolve(data.buffer); + }); + }); +}; + +module.exports.initialize = _ => { + console.debug( + "SourceMapConsumer.initialize is a no-op when running in node.js" + ); +}; Index: frontend/node_modules/source-map/lib/source-map-consumer.js =================================================================== --- frontend/node_modules/source-map/lib/source-map-consumer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/source-map-consumer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1081 @@ +/* -*- Mode: js; js-indent-level: 2; -*- */ +/* + * Copyright 2011 Mozilla Foundation and contributors + * Licensed under the New BSD license. See LICENSE or: + * http://opensource.org/licenses/BSD-3-Clause + */ + +const util = require("./util"); +const binarySearch = require("./binary-search"); +const ArraySet = require("./array-set").ArraySet; +const base64VLQ = require("./base64-vlq"); // eslint-disable-line no-unused-vars +const readWasm = require("../lib/read-wasm"); +const wasm = require("./wasm"); + +const INTERNAL = Symbol("smcInternal"); + +class SourceMapConsumer { + constructor(aSourceMap, aSourceMapURL) { + // If the constructor was called by super(), just return Promise. + // Yes, this is a hack to retain the pre-existing API of the base-class + // constructor also being an async factory function. + if (aSourceMap == INTERNAL) { + return Promise.resolve(this); + } + + return _factory(aSourceMap, aSourceMapURL); + } + + static initialize(opts) { + readWasm.initialize(opts["lib/mappings.wasm"]); + } + + static fromSourceMap(aSourceMap, aSourceMapURL) { + return _factoryBSM(aSourceMap, aSourceMapURL); + } + + /** + * Construct a new `SourceMapConsumer` from `rawSourceMap` and `sourceMapUrl` + * (see the `SourceMapConsumer` constructor for details. Then, invoke the `async + * function f(SourceMapConsumer) -> T` with the newly constructed consumer, wait + * for `f` to complete, call `destroy` on the consumer, and return `f`'s return + * value. + * + * You must not use the consumer after `f` completes! + * + * By using `with`, you do not have to remember to manually call `destroy` on + * the consumer, since it will be called automatically once `f` completes. + * + * ```js + * const xSquared = await SourceMapConsumer.with( + * myRawSourceMap, + * null, + * async function (consumer) { + * // Use `consumer` inside here and don't worry about remembering + * // to call `destroy`. + * + * const x = await whatever(consumer); + * return x * x; + * } + * ); + * + * // You may not use that `consumer` anymore out here; it has + * // been destroyed. But you can use `xSquared`. + * console.log(xSquared); + * ``` + */ + static async with(rawSourceMap, sourceMapUrl, f) { + const consumer = await new SourceMapConsumer(rawSourceMap, sourceMapUrl); + try { + return await f(consumer); + } finally { + consumer.destroy(); + } + } + + /** + * Iterate over each mapping between an original source/line/column and a + * generated line/column in this source map. + * + * @param Function aCallback + * The function that is called with each mapping. + * @param Object aContext + * Optional. If specified, this object will be the value of `this` every + * time that `aCallback` is called. + * @param aOrder + * Either `SourceMapConsumer.GENERATED_ORDER` or + * `SourceMapConsumer.ORIGINAL_ORDER`. Specifies whether you want to + * iterate over the mappings sorted by the generated file's line/column + * order or the original's source/line/column order, respectively. Defaults to + * `SourceMapConsumer.GENERATED_ORDER`. + */ + eachMapping(aCallback, aContext, aOrder) { + throw new Error("Subclasses must implement eachMapping"); + } + + /** + * Returns all generated line and column information for the original source, + * line, and column provided. If no column is provided, returns all mappings + * corresponding to a either the line we are searching for or the next + * closest line that has any mappings. Otherwise, returns all mappings + * corresponding to the given line and either the column we are searching for + * or the next closest column that has any offsets. + * + * The only argument is an object with the following properties: + * + * - source: The filename of the original source. + * - line: The line number in the original source. The line number is 1-based. + * - column: Optional. the column number in the original source. + * The column number is 0-based. + * + * and an array of objects is returned, each with the following properties: + * + * - line: The line number in the generated source, or null. The + * line number is 1-based. + * - column: The column number in the generated source, or null. + * The column number is 0-based. + */ + allGeneratedPositionsFor(aArgs) { + throw new Error("Subclasses must implement allGeneratedPositionsFor"); + } + + destroy() { + throw new Error("Subclasses must implement destroy"); + } +} + +/** + * The version of the source mapping spec that we are consuming. + */ +SourceMapConsumer.prototype._version = 3; +SourceMapConsumer.GENERATED_ORDER = 1; +SourceMapConsumer.ORIGINAL_ORDER = 2; + +SourceMapConsumer.GREATEST_LOWER_BOUND = 1; +SourceMapConsumer.LEAST_UPPER_BOUND = 2; + +exports.SourceMapConsumer = SourceMapConsumer; + +/** + * A BasicSourceMapConsumer instance represents a parsed source map which we can + * query for information about the original file positions by giving it a file + * position in the generated source. + * + * The first parameter is the raw source map (either as a JSON string, or + * already parsed to an object). According to the spec, source maps have the + * following attributes: + * + * - version: Which version of the source map spec this map is following. + * - sources: An array of URLs to the original source files. + * - names: An array of identifiers which can be referenced by individual mappings. + * - sourceRoot: Optional. The URL root from which all sources are relative. + * - sourcesContent: Optional. An array of contents of the original source files. + * - mappings: A string of base64 VLQs which contain the actual mappings. + * - file: Optional. The generated file this source map is associated with. + * + * Here is an example source map, taken from the source map spec[0]: + * + * { + * version : 3, + * file: "out.js", + * sourceRoot : "", + * sources: ["foo.js", "bar.js"], + * names: ["src", "maps", "are", "fun"], + * mappings: "AA,AB;;ABCDE;" + * } + * + * The second parameter, if given, is a string whose value is the URL + * at which the source map was found. This URL is used to compute the + * sources array. + * + * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit?pli=1# + */ +class BasicSourceMapConsumer extends SourceMapConsumer { + constructor(aSourceMap, aSourceMapURL) { + return super(INTERNAL).then(that => { + let sourceMap = aSourceMap; + if (typeof aSourceMap === "string") { + sourceMap = util.parseSourceMapInput(aSourceMap); + } + + const version = util.getArg(sourceMap, "version"); + const sources = util.getArg(sourceMap, "sources").map(String); + // Sass 3.3 leaves out the 'names' array, so we deviate from the spec (which + // requires the array) to play nice here. + const names = util.getArg(sourceMap, "names", []); + const sourceRoot = util.getArg(sourceMap, "sourceRoot", null); + const sourcesContent = util.getArg(sourceMap, "sourcesContent", null); + const mappings = util.getArg(sourceMap, "mappings"); + const file = util.getArg(sourceMap, "file", null); + const x_google_ignoreList = util.getArg( + sourceMap, + "x_google_ignoreList", + null + ); + + // Once again, Sass deviates from the spec and supplies the version as a + // string rather than a number, so we use loose equality checking here. + if (version != that._version) { + throw new Error("Unsupported version: " + version); + } + + that._sourceLookupCache = new Map(); + + // Pass `true` below to allow duplicate names and sources. While source maps + // are intended to be compressed and deduplicated, the TypeScript compiler + // sometimes generates source maps with duplicates in them. See Github issue + // #72 and bugzil.la/889492. + that._names = ArraySet.fromArray(names.map(String), true); + that._sources = ArraySet.fromArray(sources, true); + + that._absoluteSources = ArraySet.fromArray( + that._sources.toArray().map(function (s) { + return util.computeSourceURL(sourceRoot, s, aSourceMapURL); + }), + true + ); + + that.sourceRoot = sourceRoot; + that.sourcesContent = sourcesContent; + that._mappings = mappings; + that._sourceMapURL = aSourceMapURL; + that.file = file; + that.x_google_ignoreList = x_google_ignoreList; + + that._computedColumnSpans = false; + that._mappingsPtr = 0; + that._wasm = null; + + return wasm().then(w => { + that._wasm = w; + return that; + }); + }); + } + + /** + * Utility function to find the index of a source. Returns -1 if not + * found. + */ + _findSourceIndex(aSource) { + // In the most common usecases, we'll be constantly looking up the index for the same source + // files, so we cache the index lookup to avoid constantly recomputing the full URLs. + const cachedIndex = this._sourceLookupCache.get(aSource); + if (typeof cachedIndex === "number") { + return cachedIndex; + } + + // Treat the source as map-relative overall by default. + const sourceAsMapRelative = util.computeSourceURL( + null, + aSource, + this._sourceMapURL + ); + if (this._absoluteSources.has(sourceAsMapRelative)) { + const index = this._absoluteSources.indexOf(sourceAsMapRelative); + this._sourceLookupCache.set(aSource, index); + return index; + } + + // Fall back to treating the source as sourceRoot-relative. + const sourceAsSourceRootRelative = util.computeSourceURL( + this.sourceRoot, + aSource, + this._sourceMapURL + ); + if (this._absoluteSources.has(sourceAsSourceRootRelative)) { + const index = this._absoluteSources.indexOf(sourceAsSourceRootRelative); + this._sourceLookupCache.set(aSource, index); + return index; + } + + // To avoid this cache growing forever, we do not cache lookup misses. + return -1; + } + + /** + * Create a BasicSourceMapConsumer from a SourceMapGenerator. + * + * @param SourceMapGenerator aSourceMap + * The source map that will be consumed. + * @param String aSourceMapURL + * The URL at which the source map can be found (optional) + * @returns BasicSourceMapConsumer + */ + static fromSourceMap(aSourceMap, aSourceMapURL) { + return new BasicSourceMapConsumer(aSourceMap.toString()); + } + + get sources() { + return this._absoluteSources.toArray(); + } + + _getMappingsPtr() { + if (this._mappingsPtr === 0) { + this._parseMappings(); + } + + return this._mappingsPtr; + } + + /** + * Parse the mappings in a string in to a data structure which we can easily + * query (the ordered arrays in the `this.__generatedMappings` and + * `this.__originalMappings` properties). + */ + _parseMappings() { + const aStr = this._mappings; + const size = aStr.length; + + // Interpret signed result of allocate_mappings as unsigned, otherwise + // addresses higher than 2GB will be negative. + const mappingsBufPtr = this._wasm.exports.allocate_mappings(size) >>> 0; + const mappingsBuf = new Uint8Array( + this._wasm.exports.memory.buffer, + mappingsBufPtr, + size + ); + for (let i = 0; i < size; i++) { + mappingsBuf[i] = aStr.charCodeAt(i); + } + + const mappingsPtr = this._wasm.exports.parse_mappings(mappingsBufPtr); + + if (!mappingsPtr) { + const error = this._wasm.exports.get_last_error(); + let msg = `Error parsing mappings (code ${error}): `; + + // XXX: keep these error codes in sync with `wasm-mappings`. + switch (error) { + case 1: + msg += + "the mappings contained a negative line, column, source index, or name index"; + break; + case 2: + msg += "the mappings contained a number larger than 2**32"; + break; + case 3: + msg += "reached EOF while in the middle of parsing a VLQ"; + break; + case 4: + msg += "invalid base 64 character while parsing a VLQ"; + break; + default: + msg += "unknown error code"; + break; + } + + throw new Error(msg); + } + + this._mappingsPtr = mappingsPtr; + } + + eachMapping(aCallback, aContext, aOrder) { + const context = aContext || null; + const order = aOrder || SourceMapConsumer.GENERATED_ORDER; + + this._wasm.withMappingCallback( + mapping => { + if (mapping.source !== null) { + mapping.source = this._absoluteSources.at(mapping.source); + + if (mapping.name !== null) { + mapping.name = this._names.at(mapping.name); + } + } + if (this._computedColumnSpans && mapping.lastGeneratedColumn === null) { + mapping.lastGeneratedColumn = Infinity; + } + + aCallback.call(context, mapping); + }, + () => { + switch (order) { + case SourceMapConsumer.GENERATED_ORDER: + this._wasm.exports.by_generated_location(this._getMappingsPtr()); + break; + case SourceMapConsumer.ORIGINAL_ORDER: + this._wasm.exports.by_original_location(this._getMappingsPtr()); + break; + default: + throw new Error("Unknown order of iteration."); + } + } + ); + } + + allGeneratedPositionsFor(aArgs) { + let source = util.getArg(aArgs, "source"); + const originalLine = util.getArg(aArgs, "line"); + const originalColumn = aArgs.column || 0; + + source = this._findSourceIndex(source); + if (source < 0) { + return []; + } + + if (originalLine < 1) { + throw new Error("Line numbers must be >= 1"); + } + + if (originalColumn < 0) { + throw new Error("Column numbers must be >= 0"); + } + + const mappings = []; + + this._wasm.withMappingCallback( + m => { + let lastColumn = m.lastGeneratedColumn; + if (this._computedColumnSpans && lastColumn === null) { + lastColumn = Infinity; + } + mappings.push({ + line: m.generatedLine, + column: m.generatedColumn, + lastColumn, + }); + }, + () => { + this._wasm.exports.all_generated_locations_for( + this._getMappingsPtr(), + source, + originalLine - 1, + "column" in aArgs, + originalColumn + ); + } + ); + + return mappings; + } + + destroy() { + if (this._mappingsPtr !== 0) { + this._wasm.exports.free_mappings(this._mappingsPtr); + this._mappingsPtr = 0; + } + } + + /** + * Compute the last column for each generated mapping. The last column is + * inclusive. + */ + computeColumnSpans() { + if (this._computedColumnSpans) { + return; + } + + this._wasm.exports.compute_column_spans(this._getMappingsPtr()); + this._computedColumnSpans = true; + } + + /** + * Returns the original source, line, and column information for the generated + * source's line and column positions provided. The only argument is an object + * with the following properties: + * + * - line: The line number in the generated source. The line number + * is 1-based. + * - column: The column number in the generated source. The column + * number is 0-based. + * - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or + * 'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the + * closest element that is smaller than or greater than the one we are + * searching for, respectively, if the exact element cannot be found. + * Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'. + * + * and an object is returned with the following properties: + * + * - source: The original source file, or null. + * - line: The line number in the original source, or null. The + * line number is 1-based. + * - column: The column number in the original source, or null. The + * column number is 0-based. + * - name: The original identifier, or null. + */ + originalPositionFor(aArgs) { + const needle = { + generatedLine: util.getArg(aArgs, "line"), + generatedColumn: util.getArg(aArgs, "column"), + }; + + if (needle.generatedLine < 1) { + throw new Error("Line numbers must be >= 1"); + } + + if (needle.generatedColumn < 0) { + throw new Error("Column numbers must be >= 0"); + } + + let bias = util.getArg( + aArgs, + "bias", + SourceMapConsumer.GREATEST_LOWER_BOUND + ); + if (bias == null) { + bias = SourceMapConsumer.GREATEST_LOWER_BOUND; + } + + let mapping; + this._wasm.withMappingCallback( + m => (mapping = m), + () => { + this._wasm.exports.original_location_for( + this._getMappingsPtr(), + needle.generatedLine - 1, + needle.generatedColumn, + bias + ); + } + ); + + if (mapping) { + if (mapping.generatedLine === needle.generatedLine) { + let source = util.getArg(mapping, "source", null); + if (source !== null) { + source = this._absoluteSources.at(source); + } + + let name = util.getArg(mapping, "name", null); + if (name !== null) { + name = this._names.at(name); + } + + return { + source, + line: util.getArg(mapping, "originalLine", null), + column: util.getArg(mapping, "originalColumn", null), + name, + }; + } + } + + return { + source: null, + line: null, + column: null, + name: null, + }; + } + + /** + * Return true if we have the source content for every source in the source + * map, false otherwise. + */ + hasContentsOfAllSources() { + if (!this.sourcesContent) { + return false; + } + return ( + this.sourcesContent.length >= this._sources.size() && + !this.sourcesContent.some(function (sc) { + return sc == null; + }) + ); + } + + /** + * Returns the original source content. The only argument is the url of the + * original source file. Returns null if no original source content is + * available. + */ + sourceContentFor(aSource, nullOnMissing) { + if (!this.sourcesContent) { + return null; + } + + const index = this._findSourceIndex(aSource); + if (index >= 0) { + return this.sourcesContent[index]; + } + + // This function is used recursively from + // IndexedSourceMapConsumer.prototype.sourceContentFor. In that case, we + // don't want to throw if we can't find the source - we just want to + // return null, so we provide a flag to exit gracefully. + if (nullOnMissing) { + return null; + } + + throw new Error('"' + aSource + '" is not in the SourceMap.'); + } + + /** + * Returns the generated line and column information for the original source, + * line, and column positions provided. The only argument is an object with + * the following properties: + * + * - source: The filename of the original source. + * - line: The line number in the original source. The line number + * is 1-based. + * - column: The column number in the original source. The column + * number is 0-based. + * - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or + * 'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the + * closest element that is smaller than or greater than the one we are + * searching for, respectively, if the exact element cannot be found. + * Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'. + * + * and an object is returned with the following properties: + * + * - line: The line number in the generated source, or null. The + * line number is 1-based. + * - column: The column number in the generated source, or null. + * The column number is 0-based. + */ + generatedPositionFor(aArgs) { + let source = util.getArg(aArgs, "source"); + source = this._findSourceIndex(source); + if (source < 0) { + return { + line: null, + column: null, + lastColumn: null, + }; + } + + const needle = { + source, + originalLine: util.getArg(aArgs, "line"), + originalColumn: util.getArg(aArgs, "column"), + }; + + if (needle.originalLine < 1) { + throw new Error("Line numbers must be >= 1"); + } + + if (needle.originalColumn < 0) { + throw new Error("Column numbers must be >= 0"); + } + + let bias = util.getArg( + aArgs, + "bias", + SourceMapConsumer.GREATEST_LOWER_BOUND + ); + if (bias == null) { + bias = SourceMapConsumer.GREATEST_LOWER_BOUND; + } + + let mapping; + this._wasm.withMappingCallback( + m => (mapping = m), + () => { + this._wasm.exports.generated_location_for( + this._getMappingsPtr(), + needle.source, + needle.originalLine - 1, + needle.originalColumn, + bias + ); + } + ); + + if (mapping) { + if (mapping.source === needle.source) { + let lastColumn = mapping.lastGeneratedColumn; + if (this._computedColumnSpans && lastColumn === null) { + lastColumn = Infinity; + } + return { + line: util.getArg(mapping, "generatedLine", null), + column: util.getArg(mapping, "generatedColumn", null), + lastColumn, + }; + } + } + + return { + line: null, + column: null, + lastColumn: null, + }; + } +} + +BasicSourceMapConsumer.prototype.consumer = SourceMapConsumer; +exports.BasicSourceMapConsumer = BasicSourceMapConsumer; + +/** + * An IndexedSourceMapConsumer instance represents a parsed source map which + * we can query for information. It differs from BasicSourceMapConsumer in + * that it takes "indexed" source maps (i.e. ones with a "sections" field) as + * input. + * + * The first parameter is a raw source map (either as a JSON string, or already + * parsed to an object). According to the spec for indexed source maps, they + * have the following attributes: + * + * - version: Which version of the source map spec this map is following. + * - file: Optional. The generated file this source map is associated with. + * - sections: A list of section definitions. + * + * Each value under the "sections" field has two fields: + * - offset: The offset into the original specified at which this section + * begins to apply, defined as an object with a "line" and "column" + * field. + * - map: A source map definition. This source map could also be indexed, + * but doesn't have to be. + * + * Instead of the "map" field, it's also possible to have a "url" field + * specifying a URL to retrieve a source map from, but that's currently + * unsupported. + * + * Here's an example source map, taken from the source map spec[0], but + * modified to omit a section which uses the "url" field. + * + * { + * version : 3, + * file: "app.js", + * sections: [{ + * offset: {line:100, column:10}, + * map: { + * version : 3, + * file: "section.js", + * sources: ["foo.js", "bar.js"], + * names: ["src", "maps", "are", "fun"], + * mappings: "AAAA,E;;ABCDE;" + * } + * }], + * } + * + * The second parameter, if given, is a string whose value is the URL + * at which the source map was found. This URL is used to compute the + * sources array. + * + * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit#heading=h.535es3xeprgt + */ +class IndexedSourceMapConsumer extends SourceMapConsumer { + constructor(aSourceMap, aSourceMapURL) { + return super(INTERNAL).then(that => { + let sourceMap = aSourceMap; + if (typeof aSourceMap === "string") { + sourceMap = util.parseSourceMapInput(aSourceMap); + } + + const version = util.getArg(sourceMap, "version"); + const sections = util.getArg(sourceMap, "sections"); + + if (version != that._version) { + throw new Error("Unsupported version: " + version); + } + + let lastOffset = { + line: -1, + column: 0, + }; + return Promise.all( + sections.map(s => { + if (s.url) { + // The url field will require support for asynchronicity. + // See https://github.com/mozilla/source-map/issues/16 + throw new Error( + "Support for url field in sections not implemented." + ); + } + const offset = util.getArg(s, "offset"); + const offsetLine = util.getArg(offset, "line"); + const offsetColumn = util.getArg(offset, "column"); + + if ( + offsetLine < lastOffset.line || + (offsetLine === lastOffset.line && offsetColumn < lastOffset.column) + ) { + throw new Error( + "Section offsets must be ordered and non-overlapping." + ); + } + lastOffset = offset; + + const cons = new SourceMapConsumer( + util.getArg(s, "map"), + aSourceMapURL + ); + return cons.then(consumer => { + return { + generatedOffset: { + // The offset fields are 0-based, but we use 1-based indices when + // encoding/decoding from VLQ. + generatedLine: offsetLine + 1, + generatedColumn: offsetColumn + 1, + }, + consumer, + }; + }); + }) + ).then(s => { + that._sections = s; + return that; + }); + }); + } + + /** + * The list of original sources. + */ + get sources() { + const sources = []; + for (let i = 0; i < this._sections.length; i++) { + for (let j = 0; j < this._sections[i].consumer.sources.length; j++) { + sources.push(this._sections[i].consumer.sources[j]); + } + } + return sources; + } + + /** + * Returns the original source, line, and column information for the generated + * source's line and column positions provided. The only argument is an object + * with the following properties: + * + * - line: The line number in the generated source. The line number + * is 1-based. + * - column: The column number in the generated source. The column + * number is 0-based. + * + * and an object is returned with the following properties: + * + * - source: The original source file, or null. + * - line: The line number in the original source, or null. The + * line number is 1-based. + * - column: The column number in the original source, or null. The + * column number is 0-based. + * - name: The original identifier, or null. + */ + originalPositionFor(aArgs) { + const needle = { + generatedLine: util.getArg(aArgs, "line"), + generatedColumn: util.getArg(aArgs, "column"), + }; + + // Find the section containing the generated position we're trying to map + // to an original position. + const sectionIndex = binarySearch.search( + needle, + this._sections, + function (aNeedle, section) { + const cmp = + aNeedle.generatedLine - section.generatedOffset.generatedLine; + if (cmp) { + return cmp; + } + + // The generated column is 0-based, but the section offset column is + // stored 1-based. + return ( + aNeedle.generatedColumn - + (section.generatedOffset.generatedColumn - 1) + ); + } + ); + const section = this._sections[sectionIndex]; + + if (!section) { + return { + source: null, + line: null, + column: null, + name: null, + }; + } + + return section.consumer.originalPositionFor({ + line: needle.generatedLine - (section.generatedOffset.generatedLine - 1), + column: + needle.generatedColumn - + (section.generatedOffset.generatedLine === needle.generatedLine + ? section.generatedOffset.generatedColumn - 1 + : 0), + bias: aArgs.bias, + }); + } + + /** + * Return true if we have the source content for every source in the source + * map, false otherwise. + */ + hasContentsOfAllSources() { + return this._sections.every(function (s) { + return s.consumer.hasContentsOfAllSources(); + }); + } + + /** + * Returns the original source content. The only argument is the url of the + * original source file. Returns null if no original source content is + * available. + */ + sourceContentFor(aSource, nullOnMissing) { + for (let i = 0; i < this._sections.length; i++) { + const section = this._sections[i]; + + const content = section.consumer.sourceContentFor(aSource, true); + if (content) { + return content; + } + } + if (nullOnMissing) { + return null; + } + throw new Error('"' + aSource + '" is not in the SourceMap.'); + } + + _findSectionIndex(source) { + for (let i = 0; i < this._sections.length; i++) { + const { consumer } = this._sections[i]; + if (consumer._findSourceIndex(source) !== -1) { + return i; + } + } + return -1; + } + + /** + * Returns the generated line and column information for the original source, + * line, and column positions provided. The only argument is an object with + * the following properties: + * + * - source: The filename of the original source. + * - line: The line number in the original source. The line number + * is 1-based. + * - column: The column number in the original source. The column + * number is 0-based. + * + * and an object is returned with the following properties: + * + * - line: The line number in the generated source, or null. The + * line number is 1-based. + * - column: The column number in the generated source, or null. + * The column number is 0-based. + */ + generatedPositionFor(aArgs) { + const index = this._findSectionIndex(util.getArg(aArgs, "source")); + const section = index >= 0 ? this._sections[index] : null; + const nextSection = + index >= 0 && index + 1 < this._sections.length + ? this._sections[index + 1] + : null; + + const generatedPosition = + section && section.consumer.generatedPositionFor(aArgs); + if (generatedPosition && generatedPosition.line !== null) { + const lineShift = section.generatedOffset.generatedLine - 1; + const columnShift = section.generatedOffset.generatedColumn - 1; + + if (generatedPosition.line === 1) { + generatedPosition.column += columnShift; + if (typeof generatedPosition.lastColumn === "number") { + generatedPosition.lastColumn += columnShift; + } + } + + if ( + generatedPosition.lastColumn === Infinity && + nextSection && + generatedPosition.line === nextSection.generatedOffset.generatedLine + ) { + generatedPosition.lastColumn = + nextSection.generatedOffset.generatedColumn - 2; + } + generatedPosition.line += lineShift; + + return generatedPosition; + } + + return { + line: null, + column: null, + lastColumn: null, + }; + } + + allGeneratedPositionsFor(aArgs) { + const index = this._findSectionIndex(util.getArg(aArgs, "source")); + const section = index >= 0 ? this._sections[index] : null; + const nextSection = + index >= 0 && index + 1 < this._sections.length + ? this._sections[index + 1] + : null; + + if (!section) return []; + + return section.consumer + .allGeneratedPositionsFor(aArgs) + .map(generatedPosition => { + const lineShift = section.generatedOffset.generatedLine - 1; + const columnShift = section.generatedOffset.generatedColumn - 1; + + if (generatedPosition.line === 1) { + generatedPosition.column += columnShift; + if (typeof generatedPosition.lastColumn === "number") { + generatedPosition.lastColumn += columnShift; + } + } + + if ( + generatedPosition.lastColumn === Infinity && + nextSection && + generatedPosition.line === nextSection.generatedOffset.generatedLine + ) { + generatedPosition.lastColumn = + nextSection.generatedOffset.generatedColumn - 2; + } + generatedPosition.line += lineShift; + + return generatedPosition; + }); + } + + eachMapping(aCallback, aContext, aOrder) { + this._sections.forEach((section, index) => { + const nextSection = + index + 1 < this._sections.length ? this._sections[index + 1] : null; + const { generatedOffset } = section; + + const lineShift = generatedOffset.generatedLine - 1; + const columnShift = generatedOffset.generatedColumn - 1; + + section.consumer.eachMapping( + function (mapping) { + if (mapping.generatedLine === 1) { + mapping.generatedColumn += columnShift; + + if (typeof mapping.lastGeneratedColumn === "number") { + mapping.lastGeneratedColumn += columnShift; + } + } + + if ( + mapping.lastGeneratedColumn === Infinity && + nextSection && + mapping.generatedLine === nextSection.generatedOffset.generatedLine + ) { + mapping.lastGeneratedColumn = + nextSection.generatedOffset.generatedColumn - 2; + } + mapping.generatedLine += lineShift; + + aCallback.call(this, mapping); + }, + aContext, + aOrder + ); + }); + } + + computeColumnSpans() { + for (let i = 0; i < this._sections.length; i++) { + this._sections[i].consumer.computeColumnSpans(); + } + } + + destroy() { + for (let i = 0; i < this._sections.length; i++) { + this._sections[i].consumer.destroy(); + } + } +} +exports.IndexedSourceMapConsumer = IndexedSourceMapConsumer; + +/* + * Cheat to get around inter-twingled classes. `factory()` can be at the end + * where it has access to non-hoisted classes, but it gets hoisted itself. + */ +function _factory(aSourceMap, aSourceMapURL) { + let sourceMap = aSourceMap; + if (typeof aSourceMap === "string") { + sourceMap = util.parseSourceMapInput(aSourceMap); + } + + const consumer = + sourceMap.sections != null + ? new IndexedSourceMapConsumer(sourceMap, aSourceMapURL) + : new BasicSourceMapConsumer(sourceMap, aSourceMapURL); + return Promise.resolve(consumer); +} + +function _factoryBSM(aSourceMap, aSourceMapURL) { + return BasicSourceMapConsumer.fromSourceMap(aSourceMap, aSourceMapURL); +} Index: frontend/node_modules/source-map/lib/source-map-generator.js =================================================================== --- frontend/node_modules/source-map/lib/source-map-generator.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/source-map-generator.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,439 @@ +/* -*- Mode: js; js-indent-level: 2; -*- */ +/* + * Copyright 2011 Mozilla Foundation and contributors + * Licensed under the New BSD license. See LICENSE or: + * http://opensource.org/licenses/BSD-3-Clause + */ + +const base64VLQ = require("./base64-vlq"); +const util = require("./util"); +const ArraySet = require("./array-set").ArraySet; +const MappingList = require("./mapping-list").MappingList; + +/** + * An instance of the SourceMapGenerator represents a source map which is + * being built incrementally. You may pass an object with the following + * properties: + * + * - file: The filename of the generated source. + * - sourceRoot: A root for all relative URLs in this source map. + */ +class SourceMapGenerator { + constructor(aArgs) { + if (!aArgs) { + aArgs = {}; + } + this._file = util.getArg(aArgs, "file", null); + this._sourceRoot = util.getArg(aArgs, "sourceRoot", null); + this._skipValidation = util.getArg(aArgs, "skipValidation", false); + this._sources = new ArraySet(); + this._names = new ArraySet(); + this._mappings = new MappingList(); + this._sourcesContents = null; + } + + /** + * Creates a new SourceMapGenerator based on a SourceMapConsumer + * + * @param aSourceMapConsumer The SourceMap. + */ + static fromSourceMap(aSourceMapConsumer) { + const sourceRoot = aSourceMapConsumer.sourceRoot; + const generator = new SourceMapGenerator({ + file: aSourceMapConsumer.file, + sourceRoot, + }); + aSourceMapConsumer.eachMapping(function (mapping) { + const newMapping = { + generated: { + line: mapping.generatedLine, + column: mapping.generatedColumn, + }, + }; + + if (mapping.source != null) { + newMapping.source = mapping.source; + if (sourceRoot != null) { + newMapping.source = util.relative(sourceRoot, newMapping.source); + } + + newMapping.original = { + line: mapping.originalLine, + column: mapping.originalColumn, + }; + + if (mapping.name != null) { + newMapping.name = mapping.name; + } + } + + generator.addMapping(newMapping); + }); + aSourceMapConsumer.sources.forEach(function (sourceFile) { + let sourceRelative = sourceFile; + if (sourceRoot != null) { + sourceRelative = util.relative(sourceRoot, sourceFile); + } + + if (!generator._sources.has(sourceRelative)) { + generator._sources.add(sourceRelative); + } + + const content = aSourceMapConsumer.sourceContentFor(sourceFile); + if (content != null) { + generator.setSourceContent(sourceFile, content); + } + }); + return generator; + } + + /** + * Add a single mapping from original source line and column to the generated + * source's line and column for this source map being created. The mapping + * object should have the following properties: + * + * - generated: An object with the generated line and column positions. + * - original: An object with the original line and column positions. + * - source: The original source file (relative to the sourceRoot). + * - name: An optional original token name for this mapping. + */ + addMapping(aArgs) { + const generated = util.getArg(aArgs, "generated"); + const original = util.getArg(aArgs, "original", null); + let source = util.getArg(aArgs, "source", null); + let name = util.getArg(aArgs, "name", null); + + if (!this._skipValidation) { + this._validateMapping(generated, original, source, name); + } + + if (source != null) { + source = String(source); + if (!this._sources.has(source)) { + this._sources.add(source); + } + } + + if (name != null) { + name = String(name); + if (!this._names.has(name)) { + this._names.add(name); + } + } + + this._mappings.add({ + generatedLine: generated.line, + generatedColumn: generated.column, + originalLine: original && original.line, + originalColumn: original && original.column, + source, + name, + }); + } + + /** + * Set the source content for a source file. + */ + setSourceContent(aSourceFile, aSourceContent) { + let source = aSourceFile; + if (this._sourceRoot != null) { + source = util.relative(this._sourceRoot, source); + } + + if (aSourceContent != null) { + // Add the source content to the _sourcesContents map. + // Create a new _sourcesContents map if the property is null. + if (!this._sourcesContents) { + this._sourcesContents = Object.create(null); + } + this._sourcesContents[util.toSetString(source)] = aSourceContent; + } else if (this._sourcesContents) { + // Remove the source file from the _sourcesContents map. + // If the _sourcesContents map is empty, set the property to null. + delete this._sourcesContents[util.toSetString(source)]; + if (Object.keys(this._sourcesContents).length === 0) { + this._sourcesContents = null; + } + } + } + + /** + * Applies the mappings of a sub-source-map for a specific source file to the + * source map being generated. Each mapping to the supplied source file is + * rewritten using the supplied source map. Note: The resolution for the + * resulting mappings is the minimium of this map and the supplied map. + * + * @param aSourceMapConsumer The source map to be applied. + * @param aSourceFile Optional. The filename of the source file. + * If omitted, SourceMapConsumer's file property will be used. + * @param aSourceMapPath Optional. The dirname of the path to the source map + * to be applied. If relative, it is relative to the SourceMapConsumer. + * This parameter is needed when the two source maps aren't in the same + * directory, and the source map to be applied contains relative source + * paths. If so, those relative source paths need to be rewritten + * relative to the SourceMapGenerator. + */ + applySourceMap(aSourceMapConsumer, aSourceFile, aSourceMapPath) { + let sourceFile = aSourceFile; + // If aSourceFile is omitted, we will use the file property of the SourceMap + if (aSourceFile == null) { + if (aSourceMapConsumer.file == null) { + throw new Error( + "SourceMapGenerator.prototype.applySourceMap requires either an explicit source file, " + + 'or the source map\'s "file" property. Both were omitted.' + ); + } + sourceFile = aSourceMapConsumer.file; + } + const sourceRoot = this._sourceRoot; + // Make "sourceFile" relative if an absolute Url is passed. + if (sourceRoot != null) { + sourceFile = util.relative(sourceRoot, sourceFile); + } + // Applying the SourceMap can add and remove items from the sources and + // the names array. + const newSources = + this._mappings.toArray().length > 0 ? new ArraySet() : this._sources; + const newNames = new ArraySet(); + + // Find mappings for the "sourceFile" + this._mappings.unsortedForEach(function (mapping) { + if (mapping.source === sourceFile && mapping.originalLine != null) { + // Check if it can be mapped by the source map, then update the mapping. + const original = aSourceMapConsumer.originalPositionFor({ + line: mapping.originalLine, + column: mapping.originalColumn, + }); + if (original.source != null) { + // Copy mapping + mapping.source = original.source; + if (aSourceMapPath != null) { + mapping.source = util.join(aSourceMapPath, mapping.source); + } + if (sourceRoot != null) { + mapping.source = util.relative(sourceRoot, mapping.source); + } + mapping.originalLine = original.line; + mapping.originalColumn = original.column; + if (original.name != null) { + mapping.name = original.name; + } + } + } + + const source = mapping.source; + if (source != null && !newSources.has(source)) { + newSources.add(source); + } + + const name = mapping.name; + if (name != null && !newNames.has(name)) { + newNames.add(name); + } + }, this); + this._sources = newSources; + this._names = newNames; + + // Copy sourcesContents of applied map. + aSourceMapConsumer.sources.forEach(function (srcFile) { + const content = aSourceMapConsumer.sourceContentFor(srcFile); + if (content != null) { + if (aSourceMapPath != null) { + srcFile = util.join(aSourceMapPath, srcFile); + } + if (sourceRoot != null) { + srcFile = util.relative(sourceRoot, srcFile); + } + this.setSourceContent(srcFile, content); + } + }, this); + } + + /** + * A mapping can have one of the three levels of data: + * + * 1. Just the generated position. + * 2. The Generated position, original position, and original source. + * 3. Generated and original position, original source, as well as a name + * token. + * + * To maintain consistency, we validate that any new mapping being added falls + * in to one of these categories. + */ + _validateMapping(aGenerated, aOriginal, aSource, aName) { + // When aOriginal is truthy but has empty values for .line and .column, + // it is most likely a programmer error. In this case we throw a very + // specific error message to try to guide them the right way. + // For example: https://github.com/Polymer/polymer-bundler/pull/519 + if ( + aOriginal && + typeof aOriginal.line !== "number" && + typeof aOriginal.column !== "number" + ) { + throw new Error( + "original.line and original.column are not numbers -- you probably meant to omit " + + "the original mapping entirely and only map the generated position. If so, pass " + + "null for the original mapping instead of an object with empty or null values." + ); + } + + if ( + aGenerated && + "line" in aGenerated && + "column" in aGenerated && + aGenerated.line > 0 && + aGenerated.column >= 0 && + !aOriginal && + !aSource && + !aName + ) { + // Case 1. + } else if ( + aGenerated && + "line" in aGenerated && + "column" in aGenerated && + aOriginal && + "line" in aOriginal && + "column" in aOriginal && + aGenerated.line > 0 && + aGenerated.column >= 0 && + aOriginal.line > 0 && + aOriginal.column >= 0 && + aSource + ) { + // Cases 2 and 3. + } else { + throw new Error( + "Invalid mapping: " + + JSON.stringify({ + generated: aGenerated, + source: aSource, + original: aOriginal, + name: aName, + }) + ); + } + } + + /** + * Serialize the accumulated mappings in to the stream of base 64 VLQs + * specified by the source map format. + */ + _serializeMappings() { + let previousGeneratedColumn = 0; + let previousGeneratedLine = 1; + let previousOriginalColumn = 0; + let previousOriginalLine = 0; + let previousName = 0; + let previousSource = 0; + let result = ""; + let next; + let mapping; + let nameIdx; + let sourceIdx; + + const mappings = this._mappings.toArray(); + for (let i = 0, len = mappings.length; i < len; i++) { + mapping = mappings[i]; + next = ""; + + if (mapping.generatedLine !== previousGeneratedLine) { + previousGeneratedColumn = 0; + while (mapping.generatedLine !== previousGeneratedLine) { + next += ";"; + previousGeneratedLine++; + } + } else if (i > 0) { + if ( + !util.compareByGeneratedPositionsInflated(mapping, mappings[i - 1]) + ) { + continue; + } + next += ","; + } + + next += base64VLQ.encode( + mapping.generatedColumn - previousGeneratedColumn + ); + previousGeneratedColumn = mapping.generatedColumn; + + if (mapping.source != null) { + sourceIdx = this._sources.indexOf(mapping.source); + next += base64VLQ.encode(sourceIdx - previousSource); + previousSource = sourceIdx; + + // lines are stored 0-based in SourceMap spec version 3 + next += base64VLQ.encode( + mapping.originalLine - 1 - previousOriginalLine + ); + previousOriginalLine = mapping.originalLine - 1; + + next += base64VLQ.encode( + mapping.originalColumn - previousOriginalColumn + ); + previousOriginalColumn = mapping.originalColumn; + + if (mapping.name != null) { + nameIdx = this._names.indexOf(mapping.name); + next += base64VLQ.encode(nameIdx - previousName); + previousName = nameIdx; + } + } + + result += next; + } + + return result; + } + + _generateSourcesContent(aSources, aSourceRoot) { + return aSources.map(function (source) { + if (!this._sourcesContents) { + return null; + } + if (aSourceRoot != null) { + source = util.relative(aSourceRoot, source); + } + const key = util.toSetString(source); + return Object.prototype.hasOwnProperty.call(this._sourcesContents, key) + ? this._sourcesContents[key] + : null; + }, this); + } + + /** + * Externalize the source map. + */ + toJSON() { + const map = { + version: this._version, + sources: this._sources.toArray(), + names: this._names.toArray(), + mappings: this._serializeMappings(), + }; + if (this._file != null) { + map.file = this._file; + } + if (this._sourceRoot != null) { + map.sourceRoot = this._sourceRoot; + } + if (this._sourcesContents) { + map.sourcesContent = this._generateSourcesContent( + map.sources, + map.sourceRoot + ); + } + + return map; + } + + /** + * Render the source map being generated to a string. + */ + toString() { + return JSON.stringify(this.toJSON()); + } +} + +SourceMapGenerator.prototype._version = 3; +exports.SourceMapGenerator = SourceMapGenerator; Index: frontend/node_modules/source-map/lib/source-node.js =================================================================== --- frontend/node_modules/source-map/lib/source-node.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/source-node.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,430 @@ +/* -*- Mode: js; js-indent-level: 2; -*- */ +/* + * Copyright 2011 Mozilla Foundation and contributors + * Licensed under the New BSD license. See LICENSE or: + * http://opensource.org/licenses/BSD-3-Clause + */ + +const SourceMapGenerator = require("./source-map-generator").SourceMapGenerator; +const util = require("./util"); + +// Matches a Windows-style `\r\n` newline or a `\n` newline used by all other +// operating systems these days (capturing the result). +const REGEX_NEWLINE = /(\r?\n)/; + +// Newline character code for charCodeAt() comparisons +const NEWLINE_CODE = 10; + +// Private symbol for identifying `SourceNode`s when multiple versions of +// the source-map library are loaded. This MUST NOT CHANGE across +// versions! +const isSourceNode = "$$$isSourceNode$$$"; + +/** + * SourceNodes provide a way to abstract over interpolating/concatenating + * snippets of generated JavaScript source code while maintaining the line and + * column information associated with the original source code. + * + * @param aLine The original line number. + * @param aColumn The original column number. + * @param aSource The original source's filename. + * @param aChunks Optional. An array of strings which are snippets of + * generated JS, or other SourceNodes. + * @param aName The original identifier. + */ +class SourceNode { + constructor(aLine, aColumn, aSource, aChunks, aName) { + this.children = []; + this.sourceContents = {}; + this.line = aLine == null ? null : aLine; + this.column = aColumn == null ? null : aColumn; + this.source = aSource == null ? null : aSource; + this.name = aName == null ? null : aName; + this[isSourceNode] = true; + if (aChunks != null) this.add(aChunks); + } + + /** + * Creates a SourceNode from generated code and a SourceMapConsumer. + * + * @param aGeneratedCode The generated code + * @param aSourceMapConsumer The SourceMap for the generated code + * @param aRelativePath Optional. The path that relative sources in the + * SourceMapConsumer should be relative to. + */ + static fromStringWithSourceMap( + aGeneratedCode, + aSourceMapConsumer, + aRelativePath + ) { + // The SourceNode we want to fill with the generated code + // and the SourceMap + const node = new SourceNode(); + + // All even indices of this array are one line of the generated code, + // while all odd indices are the newlines between two adjacent lines + // (since `REGEX_NEWLINE` captures its match). + // Processed fragments are accessed by calling `shiftNextLine`. + const remainingLines = aGeneratedCode.split(REGEX_NEWLINE); + let remainingLinesIndex = 0; + const shiftNextLine = function () { + const lineContents = getNextLine(); + // The last line of a file might not have a newline. + const newLine = getNextLine() || ""; + return lineContents + newLine; + + function getNextLine() { + return remainingLinesIndex < remainingLines.length + ? remainingLines[remainingLinesIndex++] + : undefined; + } + }; + + // We need to remember the position of "remainingLines" + let lastGeneratedLine = 1, + lastGeneratedColumn = 0; + + // The generate SourceNodes we need a code range. + // To extract it current and last mapping is used. + // Here we store the last mapping. + let lastMapping = null; + let nextLine; + + aSourceMapConsumer.eachMapping(function (mapping) { + if (lastMapping !== null) { + // We add the code from "lastMapping" to "mapping": + // First check if there is a new line in between. + if (lastGeneratedLine < mapping.generatedLine) { + // Associate first line with "lastMapping" + addMappingWithCode(lastMapping, shiftNextLine()); + lastGeneratedLine++; + lastGeneratedColumn = 0; + // The remaining code is added without mapping + } else { + // There is no new line in between. + // Associate the code between "lastGeneratedColumn" and + // "mapping.generatedColumn" with "lastMapping" + nextLine = remainingLines[remainingLinesIndex] || ""; + const code = nextLine.substr( + 0, + mapping.generatedColumn - lastGeneratedColumn + ); + remainingLines[remainingLinesIndex] = nextLine.substr( + mapping.generatedColumn - lastGeneratedColumn + ); + lastGeneratedColumn = mapping.generatedColumn; + addMappingWithCode(lastMapping, code); + // No more remaining code, continue + lastMapping = mapping; + return; + } + } + // We add the generated code until the first mapping + // to the SourceNode without any mapping. + // Each line is added as separate string. + while (lastGeneratedLine < mapping.generatedLine) { + node.add(shiftNextLine()); + lastGeneratedLine++; + } + if (lastGeneratedColumn < mapping.generatedColumn) { + nextLine = remainingLines[remainingLinesIndex] || ""; + node.add(nextLine.substr(0, mapping.generatedColumn)); + remainingLines[remainingLinesIndex] = nextLine.substr( + mapping.generatedColumn + ); + lastGeneratedColumn = mapping.generatedColumn; + } + lastMapping = mapping; + }, this); + // We have processed all mappings. + if (remainingLinesIndex < remainingLines.length) { + if (lastMapping) { + // Associate the remaining code in the current line with "lastMapping" + addMappingWithCode(lastMapping, shiftNextLine()); + } + // and add the remaining lines without any mapping + node.add(remainingLines.splice(remainingLinesIndex).join("")); + } + + // Copy sourcesContent into SourceNode + aSourceMapConsumer.sources.forEach(function (sourceFile) { + const content = aSourceMapConsumer.sourceContentFor(sourceFile); + if (content != null) { + if (aRelativePath != null) { + sourceFile = util.join(aRelativePath, sourceFile); + } + node.setSourceContent(sourceFile, content); + } + }); + + return node; + + function addMappingWithCode(mapping, code) { + if (mapping === null || mapping.source === undefined) { + node.add(code); + } else { + const source = aRelativePath + ? util.join(aRelativePath, mapping.source) + : mapping.source; + node.add( + new SourceNode( + mapping.originalLine, + mapping.originalColumn, + source, + code, + mapping.name + ) + ); + } + } + } + + /** + * Add a chunk of generated JS to this source node. + * + * @param aChunk A string snippet of generated JS code, another instance of + * SourceNode, or an array where each member is one of those things. + */ + add(aChunk) { + if (Array.isArray(aChunk)) { + aChunk.forEach(function (chunk) { + this.add(chunk); + }, this); + } else if (aChunk[isSourceNode] || typeof aChunk === "string") { + if (aChunk) { + this.children.push(aChunk); + } + } else { + throw new TypeError( + "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + + aChunk + ); + } + return this; + } + + /** + * Add a chunk of generated JS to the beginning of this source node. + * + * @param aChunk A string snippet of generated JS code, another instance of + * SourceNode, or an array where each member is one of those things. + */ + prepend(aChunk) { + if (Array.isArray(aChunk)) { + for (let i = aChunk.length - 1; i >= 0; i--) { + this.prepend(aChunk[i]); + } + } else if (aChunk[isSourceNode] || typeof aChunk === "string") { + this.children.unshift(aChunk); + } else { + throw new TypeError( + "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + + aChunk + ); + } + return this; + } + + /** + * Walk over the tree of JS snippets in this node and its children. The + * walking function is called once for each snippet of JS and is passed that + * snippet and the its original associated source's line/column location. + * + * @param aFn The traversal function. + */ + walk(aFn) { + let chunk; + for (let i = 0, len = this.children.length; i < len; i++) { + chunk = this.children[i]; + if (chunk[isSourceNode]) { + chunk.walk(aFn); + } else if (chunk !== "") { + aFn(chunk, { + source: this.source, + line: this.line, + column: this.column, + name: this.name, + }); + } + } + } + + /** + * Like `String.prototype.join` except for SourceNodes. Inserts `aStr` between + * each of `this.children`. + * + * @param aSep The separator. + */ + join(aSep) { + let newChildren; + let i; + const len = this.children.length; + if (len > 0) { + newChildren = []; + for (i = 0; i < len - 1; i++) { + newChildren.push(this.children[i]); + newChildren.push(aSep); + } + newChildren.push(this.children[i]); + this.children = newChildren; + } + return this; + } + + /** + * Call String.prototype.replace on the very right-most source snippet. Useful + * for trimming whitespace from the end of a source node, etc. + * + * @param aPattern The pattern to replace. + * @param aReplacement The thing to replace the pattern with. + */ + replaceRight(aPattern, aReplacement) { + const lastChild = this.children[this.children.length - 1]; + if (lastChild[isSourceNode]) { + lastChild.replaceRight(aPattern, aReplacement); + } else if (typeof lastChild === "string") { + this.children[this.children.length - 1] = lastChild.replace( + aPattern, + aReplacement + ); + } else { + this.children.push("".replace(aPattern, aReplacement)); + } + return this; + } + + /** + * Set the source content for a source file. This will be added to the SourceMapGenerator + * in the sourcesContent field. + * + * @param aSourceFile The filename of the source file + * @param aSourceContent The content of the source file + */ + setSourceContent(aSourceFile, aSourceContent) { + this.sourceContents[util.toSetString(aSourceFile)] = aSourceContent; + } + + /** + * Walk over the tree of SourceNodes. The walking function is called for each + * source file content and is passed the filename and source content. + * + * @param aFn The traversal function. + */ + walkSourceContents(aFn) { + for (let i = 0, len = this.children.length; i < len; i++) { + if (this.children[i][isSourceNode]) { + this.children[i].walkSourceContents(aFn); + } + } + + const sources = Object.keys(this.sourceContents); + for (let i = 0, len = sources.length; i < len; i++) { + aFn(util.fromSetString(sources[i]), this.sourceContents[sources[i]]); + } + } + + /** + * Return the string representation of this source node. Walks over the tree + * and concatenates all the various snippets together to one string. + */ + toString() { + let str = ""; + this.walk(function (chunk) { + str += chunk; + }); + return str; + } + + /** + * Returns the string representation of this source node along with a source + * map. + */ + toStringWithSourceMap(aArgs) { + const generated = { + code: "", + line: 1, + column: 0, + }; + const map = new SourceMapGenerator(aArgs); + let sourceMappingActive = false; + let lastOriginalSource = null; + let lastOriginalLine = null; + let lastOriginalColumn = null; + let lastOriginalName = null; + this.walk(function (chunk, original) { + generated.code += chunk; + if ( + original.source !== null && + original.line !== null && + original.column !== null + ) { + if ( + lastOriginalSource !== original.source || + lastOriginalLine !== original.line || + lastOriginalColumn !== original.column || + lastOriginalName !== original.name + ) { + map.addMapping({ + source: original.source, + original: { + line: original.line, + column: original.column, + }, + generated: { + line: generated.line, + column: generated.column, + }, + name: original.name, + }); + } + lastOriginalSource = original.source; + lastOriginalLine = original.line; + lastOriginalColumn = original.column; + lastOriginalName = original.name; + sourceMappingActive = true; + } else if (sourceMappingActive) { + map.addMapping({ + generated: { + line: generated.line, + column: generated.column, + }, + }); + lastOriginalSource = null; + sourceMappingActive = false; + } + for (let idx = 0, length = chunk.length; idx < length; idx++) { + if (chunk.charCodeAt(idx) === NEWLINE_CODE) { + generated.line++; + generated.column = 0; + // Mappings end at eol + if (idx + 1 === length) { + lastOriginalSource = null; + sourceMappingActive = false; + } else if (sourceMappingActive) { + map.addMapping({ + source: original.source, + original: { + line: original.line, + column: original.column, + }, + generated: { + line: generated.line, + column: generated.column, + }, + name: original.name, + }); + } + } else { + generated.column++; + } + } + }); + this.walkSourceContents(function (sourceFile, sourceContent) { + map.setSourceContent(sourceFile, sourceContent); + }); + + return { code: generated.code, map }; + } +} + +exports.SourceNode = SourceNode; Index: frontend/node_modules/source-map/lib/url.js =================================================================== --- frontend/node_modules/source-map/lib/url.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/url.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,13 @@ +/* -*- Mode: js; js-indent-level: 2; -*- */ +/* + * Copyright 2011 Mozilla Foundation and contributors + * Licensed under the New BSD license. See LICENSE or: + * http://opensource.org/licenses/BSD-3-Clause + */ +"use strict"; + +// Note: This file is overridden in the 'package.json#browser' field to +// substitute lib/url-browser.js instead. + +// Use the URL global for Node 10, and the 'url' module for Node 8. +module.exports = typeof URL === "function" ? URL : require("url").URL; Index: frontend/node_modules/source-map/lib/util.js =================================================================== --- frontend/node_modules/source-map/lib/util.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/util.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,444 @@ +/* -*- Mode: js; js-indent-level: 2; -*- */ +/* + * Copyright 2011 Mozilla Foundation and contributors + * Licensed under the New BSD license. See LICENSE or: + * http://opensource.org/licenses/BSD-3-Clause + */ + +const URL = require("./url"); + +/** + * This is a helper function for getting values from parameter/options + * objects. + * + * @param args The object we are extracting values from + * @param name The name of the property we are getting. + * @param defaultValue An optional value to return if the property is missing + * from the object. If this is not specified and the property is missing, an + * error will be thrown. + */ +function getArg(aArgs, aName, aDefaultValue) { + if (aName in aArgs) { + return aArgs[aName]; + } else if (arguments.length === 3) { + return aDefaultValue; + } + throw new Error('"' + aName + '" is a required argument.'); +} +exports.getArg = getArg; + +const supportsNullProto = (function () { + const obj = Object.create(null); + return !("__proto__" in obj); +})(); + +function identity(s) { + return s; +} + +/** + * Because behavior goes wacky when you set `__proto__` on objects, we + * have to prefix all the strings in our set with an arbitrary character. + * + * See https://github.com/mozilla/source-map/pull/31 and + * https://github.com/mozilla/source-map/issues/30 + * + * @param String aStr + */ +function toSetString(aStr) { + if (isProtoString(aStr)) { + return "$" + aStr; + } + + return aStr; +} +exports.toSetString = supportsNullProto ? identity : toSetString; + +function fromSetString(aStr) { + if (isProtoString(aStr)) { + return aStr.slice(1); + } + + return aStr; +} +exports.fromSetString = supportsNullProto ? identity : fromSetString; + +function isProtoString(s) { + if (!s) { + return false; + } + + const length = s.length; + + if (length < 9 /* "__proto__".length */) { + return false; + } + + /* eslint-disable no-multi-spaces */ + if ( + s.charCodeAt(length - 1) !== 95 /* '_' */ || + s.charCodeAt(length - 2) !== 95 /* '_' */ || + s.charCodeAt(length - 3) !== 111 /* 'o' */ || + s.charCodeAt(length - 4) !== 116 /* 't' */ || + s.charCodeAt(length - 5) !== 111 /* 'o' */ || + s.charCodeAt(length - 6) !== 114 /* 'r' */ || + s.charCodeAt(length - 7) !== 112 /* 'p' */ || + s.charCodeAt(length - 8) !== 95 /* '_' */ || + s.charCodeAt(length - 9) !== 95 /* '_' */ + ) { + return false; + } + /* eslint-enable no-multi-spaces */ + + for (let i = length - 10; i >= 0; i--) { + if (s.charCodeAt(i) !== 36 /* '$' */) { + return false; + } + } + + return true; +} + +function strcmp(aStr1, aStr2) { + if (aStr1 === aStr2) { + return 0; + } + + if (aStr1 === null) { + return 1; // aStr2 !== null + } + + if (aStr2 === null) { + return -1; // aStr1 !== null + } + + if (aStr1 > aStr2) { + return 1; + } + + return -1; +} + +/** + * Comparator between two mappings with inflated source and name strings where + * the generated positions are compared. + */ +function compareByGeneratedPositionsInflated(mappingA, mappingB) { + let cmp = mappingA.generatedLine - mappingB.generatedLine; + if (cmp !== 0) { + return cmp; + } + + cmp = mappingA.generatedColumn - mappingB.generatedColumn; + if (cmp !== 0) { + return cmp; + } + + cmp = strcmp(mappingA.source, mappingB.source); + if (cmp !== 0) { + return cmp; + } + + cmp = mappingA.originalLine - mappingB.originalLine; + if (cmp !== 0) { + return cmp; + } + + cmp = mappingA.originalColumn - mappingB.originalColumn; + if (cmp !== 0) { + return cmp; + } + + return strcmp(mappingA.name, mappingB.name); +} +exports.compareByGeneratedPositionsInflated = + compareByGeneratedPositionsInflated; + +/** + * Strip any JSON XSSI avoidance prefix from the string (as documented + * in the source maps specification), and then parse the string as + * JSON. + */ +function parseSourceMapInput(str) { + return JSON.parse(str.replace(/^\)]}'[^\n]*\n/, "")); +} +exports.parseSourceMapInput = parseSourceMapInput; + +// We use 'http' as the base here because we want URLs processed relative +// to the safe base to be treated as "special" URLs during parsing using +// the WHATWG URL parsing. This ensures that backslash normalization +// applies to the path and such. +const PROTOCOL = "http:"; +const PROTOCOL_AND_HOST = `${PROTOCOL}//host`; + +/** + * Make it easy to create small utilities that tweak a URL's path. + */ +function createSafeHandler(cb) { + return input => { + const type = getURLType(input); + const base = buildSafeBase(input); + const url = new URL(input, base); + + cb(url); + + const result = url.toString(); + + if (type === "absolute") { + return result; + } else if (type === "scheme-relative") { + return result.slice(PROTOCOL.length); + } else if (type === "path-absolute") { + return result.slice(PROTOCOL_AND_HOST.length); + } + + // This assumes that the callback will only change + // the path, search and hash values. + return computeRelativeURL(base, result); + }; +} + +function withBase(url, base) { + return new URL(url, base).toString(); +} + +function buildUniqueSegment(prefix, str) { + let id = 0; + do { + const ident = prefix + id++; + if (str.indexOf(ident) === -1) return ident; + } while (true); +} + +function buildSafeBase(str) { + const maxDotParts = str.split("..").length - 1; + + // If we used a segment that also existed in `str`, then we would be unable + // to compute relative paths. For example, if `segment` were just "a": + // + // const url = "../../a/" + // const base = buildSafeBase(url); // http://host/a/a/ + // const joined = "http://host/a/"; + // const result = relative(base, joined); + // + // Expected: "../../a/"; + // Actual: "a/" + // + const segment = buildUniqueSegment("p", str); + + let base = `${PROTOCOL_AND_HOST}/`; + for (let i = 0; i < maxDotParts; i++) { + base += `${segment}/`; + } + return base; +} + +const ABSOLUTE_SCHEME = /^[A-Za-z0-9\+\-\.]+:/; +function getURLType(url) { + if (url[0] === "/") { + if (url[1] === "/") return "scheme-relative"; + return "path-absolute"; + } + + return ABSOLUTE_SCHEME.test(url) ? "absolute" : "path-relative"; +} + +/** + * Given two URLs that are assumed to be on the same + * protocol/host/user/password build a relative URL from the + * path, params, and hash values. + * + * @param rootURL The root URL that the target will be relative to. + * @param targetURL The target that the relative URL points to. + * @return A rootURL-relative, normalized URL value. + */ +function computeRelativeURL(rootURL, targetURL) { + if (typeof rootURL === "string") rootURL = new URL(rootURL); + if (typeof targetURL === "string") targetURL = new URL(targetURL); + + const targetParts = targetURL.pathname.split("/"); + const rootParts = rootURL.pathname.split("/"); + + // If we've got a URL path ending with a "/", we remove it since we'd + // otherwise be relative to the wrong location. + if (rootParts.length > 0 && !rootParts[rootParts.length - 1]) { + rootParts.pop(); + } + + while ( + targetParts.length > 0 && + rootParts.length > 0 && + targetParts[0] === rootParts[0] + ) { + targetParts.shift(); + rootParts.shift(); + } + + const relativePath = rootParts + .map(() => "..") + .concat(targetParts) + .join("/"); + + return relativePath + targetURL.search + targetURL.hash; +} + +/** + * Given a URL, ensure that it is treated as a directory URL. + * + * @param url + * @return A normalized URL value. + */ +const ensureDirectory = createSafeHandler(url => { + url.pathname = url.pathname.replace(/\/?$/, "/"); +}); + +/** + * Given a URL, strip off any filename if one is present. + * + * @param url + * @return A normalized URL value. + */ +const trimFilename = createSafeHandler(url => { + url.href = new URL(".", url.toString()).toString(); +}); + +/** + * Normalize a given URL. + * * Convert backslashes. + * * Remove any ".." and "." segments. + * + * @param url + * @return A normalized URL value. + */ +const normalize = createSafeHandler(url => {}); +exports.normalize = normalize; + +/** + * Joins two paths/URLs. + * + * All returned URLs will be normalized. + * + * @param aRoot The root path or URL. Assumed to reference a directory. + * @param aPath The path or URL to be joined with the root. + * @return A joined and normalized URL value. + */ +function join(aRoot, aPath) { + const pathType = getURLType(aPath); + const rootType = getURLType(aRoot); + + aRoot = ensureDirectory(aRoot); + + if (pathType === "absolute") { + return withBase(aPath, undefined); + } + if (rootType === "absolute") { + return withBase(aPath, aRoot); + } + + if (pathType === "scheme-relative") { + return normalize(aPath); + } + if (rootType === "scheme-relative") { + return withBase(aPath, withBase(aRoot, PROTOCOL_AND_HOST)).slice( + PROTOCOL.length + ); + } + + if (pathType === "path-absolute") { + return normalize(aPath); + } + if (rootType === "path-absolute") { + return withBase(aPath, withBase(aRoot, PROTOCOL_AND_HOST)).slice( + PROTOCOL_AND_HOST.length + ); + } + + const base = buildSafeBase(aPath + aRoot); + const newPath = withBase(aPath, withBase(aRoot, base)); + return computeRelativeURL(base, newPath); +} +exports.join = join; + +/** + * Make a path relative to a URL or another path. If returning a + * relative URL is not possible, the original target will be returned. + * All returned URLs will be normalized. + * + * @param aRoot The root path or URL. + * @param aPath The path or URL to be made relative to aRoot. + * @return A rootURL-relative (if possible), normalized URL value. + */ +function relative(rootURL, targetURL) { + const result = relativeIfPossible(rootURL, targetURL); + + return typeof result === "string" ? result : normalize(targetURL); +} +exports.relative = relative; + +function relativeIfPossible(rootURL, targetURL) { + const urlType = getURLType(rootURL); + if (urlType !== getURLType(targetURL)) { + return null; + } + + const base = buildSafeBase(rootURL + targetURL); + const root = new URL(rootURL, base); + const target = new URL(targetURL, base); + + try { + new URL("", target.toString()); + } catch (err) { + // Bail if the URL doesn't support things being relative to it, + // For example, data: and blob: URLs. + return null; + } + + if ( + target.protocol !== root.protocol || + target.user !== root.user || + target.password !== root.password || + target.hostname !== root.hostname || + target.port !== root.port + ) { + return null; + } + + return computeRelativeURL(root, target); +} + +/** + * Compute the URL of a source given the the source root, the source's + * URL, and the source map's URL. + */ +function computeSourceURL(sourceRoot, sourceURL, sourceMapURL) { + // The source map spec states that "sourceRoot" and "sources" entries are to be appended. While + // that is a little vague, implementations have generally interpreted that as joining the + // URLs with a `/` between then, assuming the "sourceRoot" doesn't already end with one. + // For example, + // + // sourceRoot: "some-dir", + // sources: ["/some-path.js"] + // + // and + // + // sourceRoot: "some-dir/", + // sources: ["/some-path.js"] + // + // must behave as "some-dir/some-path.js". + // + // With this library's the transition to a more URL-focused implementation, that behavior is + // preserved here. To acheive that, we trim the "/" from absolute-path when a sourceRoot value + // is present in order to make the sources entries behave as if they are relative to the + // "sourceRoot", as they would have if the two strings were simply concated. + if (sourceRoot && getURLType(sourceURL) === "path-absolute") { + sourceURL = sourceURL.replace(/^\//, ""); + } + + let url = normalize(sourceURL || ""); + + // Parsing URLs can be expensive, so we only perform these joins when needed. + if (sourceRoot) url = join(sourceRoot, url); + if (sourceMapURL) url = join(trimFilename(sourceMapURL), url); + return url; +} +exports.computeSourceURL = computeSourceURL; Index: frontend/node_modules/source-map/lib/wasm.js =================================================================== --- frontend/node_modules/source-map/lib/wasm.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/source-map/lib/wasm.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,138 @@ +const readWasm = require("../lib/read-wasm"); + +/** + * Provide the JIT with a nice shape / hidden class. + */ +function Mapping() { + this.generatedLine = 0; + this.generatedColumn = 0; + this.lastGeneratedColumn = null; + this.source = null; + this.originalLine = null; + this.originalColumn = null; + this.name = null; +} + +let cachedWasm = null; + +module.exports = function wasm() { + if (cachedWasm) { + return cachedWasm; + } + + const callbackStack = []; + + cachedWasm = readWasm() + .then(buffer => { + return WebAssembly.instantiate(buffer, { + env: { + mapping_callback( + generatedLine, + generatedColumn, + + hasLastGeneratedColumn, + lastGeneratedColumn, + + hasOriginal, + source, + originalLine, + originalColumn, + + hasName, + name + ) { + const mapping = new Mapping(); + // JS uses 1-based line numbers, wasm uses 0-based. + mapping.generatedLine = generatedLine + 1; + mapping.generatedColumn = generatedColumn; + + if (hasLastGeneratedColumn) { + // JS uses inclusive last generated column, wasm uses exclusive. + mapping.lastGeneratedColumn = lastGeneratedColumn - 1; + } + + if (hasOriginal) { + mapping.source = source; + // JS uses 1-based line numbers, wasm uses 0-based. + mapping.originalLine = originalLine + 1; + mapping.originalColumn = originalColumn; + + if (hasName) { + mapping.name = name; + } + } + + callbackStack[callbackStack.length - 1](mapping); + }, + + start_all_generated_locations_for() { + console.time("all_generated_locations_for"); + }, + end_all_generated_locations_for() { + console.timeEnd("all_generated_locations_for"); + }, + + start_compute_column_spans() { + console.time("compute_column_spans"); + }, + end_compute_column_spans() { + console.timeEnd("compute_column_spans"); + }, + + start_generated_location_for() { + console.time("generated_location_for"); + }, + end_generated_location_for() { + console.timeEnd("generated_location_for"); + }, + + start_original_location_for() { + console.time("original_location_for"); + }, + end_original_location_for() { + console.timeEnd("original_location_for"); + }, + + start_parse_mappings() { + console.time("parse_mappings"); + }, + end_parse_mappings() { + console.timeEnd("parse_mappings"); + }, + + start_sort_by_generated_location() { + console.time("sort_by_generated_location"); + }, + end_sort_by_generated_location() { + console.timeEnd("sort_by_generated_location"); + }, + + start_sort_by_original_location() { + console.time("sort_by_original_location"); + }, + end_sort_by_original_location() { + console.timeEnd("sort_by_original_location"); + }, + }, + }); + }) + .then(Wasm => { + return { + exports: Wasm.instance.exports, + withMappingCallback: (mappingCallback, f) => { + callbackStack.push(mappingCallback); + try { + f(); + } finally { + callbackStack.pop(); + } + }, + }; + }) + .then(null, e => { + cachedWasm = null; + throw e; + }); + + return cachedWasm; +};