sourav-das/stem-separator

1'use strict';2 3Object.defineProperty(exports, 'commentRegex', {4  get: function getCommentRegex () {5    // Groups: 1: media type, 2: MIME type, 3: charset, 4: encoding, 5: data.6    return /^\s*?\/[\/\*][@#]\s+?sourceMappingURL=data:(((?:application|text)\/json)(?:;charset=([^;,]+?)?)?)?(?:;(base64))?,(.*?)$/mg;7  }8});9 10 11Object.defineProperty(exports, 'mapFileCommentRegex', {12  get: function getMapFileCommentRegex () {13    // Matches sourceMappingURL in either // or /* comment styles.14    return /(?:\/\/[@#][ \t]+?sourceMappingURL=([^\s'"`]+?)[ \t]*?$)|(?:\/\*[@#][ \t]+sourceMappingURL=([^*]+?)[ \t]*?(?:\*\/){1}[ \t]*?$)/mg;15  }16});17 18var decodeBase64;19if (typeof Buffer !== 'undefined') {20  if (typeof Buffer.from === 'function') {21    decodeBase64 = decodeBase64WithBufferFrom;22  } else {23    decodeBase64 = decodeBase64WithNewBuffer;24  }25} else {26  decodeBase64 = decodeBase64WithAtob;27}28 29function decodeBase64WithBufferFrom(base64) {30  return Buffer.from(base64, 'base64').toString();31}32 33function decodeBase64WithNewBuffer(base64) {34  if (typeof value === 'number') {35    throw new TypeError('The value to decode must not be of type number.');36  }37  return new Buffer(base64, 'base64').toString();38}39 40function decodeBase64WithAtob(base64) {41  return decodeURIComponent(escape(atob(base64)));42}43 44function stripComment(sm) {45  return sm.split(',').pop();46}47 48function readFromFileMap(sm, read) {49  var r = exports.mapFileCommentRegex.exec(sm);50  // for some odd reason //# .. captures in 1 and /* .. */ in 251  var filename = r[1] || r[2];52 53  try {54    var sm = read(filename);55    if (sm != null && typeof sm.catch === 'function') {56      return sm.catch(throwError);57    } else {58      return sm;59    }60  } catch (e) {61    throwError(e);62  }63 64  function throwError(e) {65    throw new Error('An error occurred while trying to read the map file at ' + filename + '\n' + e.stack);66  }67}68 69function Converter (sm, opts) {70  opts = opts || {};71 72  if (opts.hasComment) {73    sm = stripComment(sm);74  }75 76  if (opts.encoding === 'base64') {77    sm = decodeBase64(sm);78  } else if (opts.encoding === 'uri') {79    sm = decodeURIComponent(sm);80  }81 82  if (opts.isJSON || opts.encoding) {83    sm = JSON.parse(sm);84  }85 86  this.sourcemap = sm;87}88 89Converter.prototype.toJSON = function (space) {90  return JSON.stringify(this.sourcemap, null, space);91};92 93if (typeof Buffer !== 'undefined') {94  if (typeof Buffer.from === 'function') {95    Converter.prototype.toBase64 = encodeBase64WithBufferFrom;96  } else {97    Converter.prototype.toBase64 = encodeBase64WithNewBuffer;98  }99} else {100  Converter.prototype.toBase64 = encodeBase64WithBtoa;101}102 103function encodeBase64WithBufferFrom() {104  var json = this.toJSON();105  return Buffer.from(json, 'utf8').toString('base64');106}107 108function encodeBase64WithNewBuffer() {109  var json = this.toJSON();110  if (typeof json === 'number') {111    throw new TypeError('The json to encode must not be of type number.');112  }113  return new Buffer(json, 'utf8').toString('base64');114}115 116function encodeBase64WithBtoa() {117  var json = this.toJSON();118  return btoa(unescape(encodeURIComponent(json)));119}120 121Converter.prototype.toURI = function () {122  var json = this.toJSON();123  return encodeURIComponent(json);124};125 126Converter.prototype.toComment = function (options) {127  var encoding, content, data;128  if (options != null && options.encoding === 'uri') {129    encoding = '';130    content = this.toURI();131  } else {132    encoding = ';base64';133    content = this.toBase64();134  }135  data = 'sourceMappingURL=data:application/json;charset=utf-8' + encoding + ',' + content;136  return options != null && options.multiline ? '/*# ' + data + ' */' : '//# ' + data;137};138 139// returns copy instead of original140Converter.prototype.toObject = function () {141  return JSON.parse(this.toJSON());142};143 144Converter.prototype.addProperty = function (key, value) {145  if (this.sourcemap.hasOwnProperty(key)) throw new Error('property "' + key + '" already exists on the sourcemap, use set property instead');146  return this.setProperty(key, value);147};148 149Converter.prototype.setProperty = function (key, value) {150  this.sourcemap[key] = value;151  return this;152};153 154Converter.prototype.getProperty = function (key) {155  return this.sourcemap[key];156};157 158exports.fromObject = function (obj) {159  return new Converter(obj);160};161 162exports.fromJSON = function (json) {163  return new Converter(json, { isJSON: true });164};165 166exports.fromURI = function (uri) {167  return new Converter(uri, { encoding: 'uri' });168};169 170exports.fromBase64 = function (base64) {171  return new Converter(base64, { encoding: 'base64' });172};173 174exports.fromComment = function (comment) {175  var m, encoding;176  comment = comment177    .replace(/^\/\*/g, '//')178    .replace(/\*\/$/g, '');179  m = exports.commentRegex.exec(comment);180  encoding = m && m[4] || 'uri';181  return new Converter(comment, { encoding: encoding, hasComment: true });182};183 184function makeConverter(sm) {185  return new Converter(sm, { isJSON: true });186}187 188exports.fromMapFileComment = function (comment, read) {189  if (typeof read === 'string') {190    throw new Error(191      'String directory paths are no longer supported with `fromMapFileComment`\n' +192      'Please review the Upgrading documentation at https://github.com/thlorenz/convert-source-map#upgrading'193    )194  }195 196  var sm = readFromFileMap(comment, read);197  if (sm != null && typeof sm.then === 'function') {198    return sm.then(makeConverter);199  } else {200    return makeConverter(sm);201  }202};203 204// Finds last sourcemap comment in file or returns null if none was found205exports.fromSource = function (content) {206  var m = content.match(exports.commentRegex);207  return m ? exports.fromComment(m.pop()) : null;208};209 210// Finds last sourcemap comment in file or returns null if none was found211exports.fromMapFileSource = function (content, read) {212  if (typeof read === 'string') {213    throw new Error(214      'String directory paths are no longer supported with `fromMapFileSource`\n' +215      'Please review the Upgrading documentation at https://github.com/thlorenz/convert-source-map#upgrading'216    )217  }218  var m = content.match(exports.mapFileCommentRegex);219  return m ? exports.fromMapFileComment(m.pop(), read) : null;220};221 222exports.removeComments = function (src) {223  return src.replace(exports.commentRegex, '');224};225 226exports.removeMapFileComments = function (src) {227  return src.replace(exports.mapFileCommentRegex, '');228};229 230exports.generateMapFileComment = function (file, options) {231  var data = 'sourceMappingURL=' + file;232  return options && options.multiline ? '/*# ' + data + ' */' : '//# ' + data;233};234