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See LICENSE or: * http://opensource.org/licenses/BSD-3-Clause */ var util = require('./util'); var binarySearch = require('./binary-search'); var ArraySet = require('./array-set').ArraySet; var base64VLQ = require('./base64-vlq'); var quickSort = require('./quick-sort').quickSort; function SourceMapConsumer(aSourceMap) { var sourceMap = aSourceMap; if (typeof aSourceMap === 'string') { sourceMap = JSON.parse(aSourceMap.replace(/^\)\]\}'/, '')); } return sourceMap.sections != null ? new IndexedSourceMapConsumer(sourceMap) : new BasicSourceMapConsumer(sourceMap); } SourceMapConsumer.fromSourceMap = function(aSourceMap) { return BasicSourceMapConsumer.fromSourceMap(aSourceMap); } /** * The version of the source mapping spec that we are consuming. */ SourceMapConsumer.prototype._version = 3; // `__generatedMappings` and `__originalMappings` are arrays that hold the // parsed mapping coordinates from the source map's "mappings" attribute. They // are lazily instantiated, accessed via the `_generatedMappings` and // `_originalMappings` getters respectively, and we only parse the mappings // and create these arrays once queried for a source location. We jump through // these hoops because there can be many thousands of mappings, and parsing // them is expensive, so we only want to do it if we must. // // Each object in the arrays is of the form: // // { // generatedLine: The line number in the generated code, // generatedColumn: The column number in the generated code, // source: The path to the original source file that generated this // chunk of code, // originalLine: The line number in the original source that // corresponds to this chunk of generated code, // originalColumn: The column number in the original source that // corresponds to this chunk of generated code, // name: The name of the original symbol which generated this chunk of // code. // } // // All properties except for `generatedLine` and `generatedColumn` can be // `null`. // // `_generatedMappings` is ordered by the generated positions. // // `_originalMappings` is ordered by the original positions. SourceMapConsumer.prototype.__generatedMappings = null; Object.defineProperty(SourceMapConsumer.prototype, '_generatedMappings', { get: function () { if (!this.__generatedMappings) { this._parseMappings(this._mappings, this.sourceRoot); } return this.__generatedMappings; } }); SourceMapConsumer.prototype.__originalMappings = null; Object.defineProperty(SourceMapConsumer.prototype, '_originalMappings', { get: function () { if (!this.__originalMappings) { this._parseMappings(this._mappings, this.sourceRoot); } return this.__originalMappings; } }); SourceMapConsumer.prototype._charIsMappingSeparator = function SourceMapConsumer_charIsMappingSeparator(aStr, index) { var c = aStr.charAt(index); return c === ";" || c === ","; }; /** * 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). */ SourceMapConsumer.prototype._parseMappings = function SourceMapConsumer_parseMappings(aStr, aSourceRoot) { throw new Error("Subclasses must implement _parseMappings"); }; SourceMapConsumer.GENERATED_ORDER = 1; SourceMapConsumer.ORIGINAL_ORDER = 2; SourceMapConsumer.GREATEST_LOWER_BOUND = 1; SourceMapConsumer.LEAST_UPPER_BOUND = 2; /** * 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`. */ SourceMapConsumer.prototype.eachMapping = function SourceMapConsumer_eachMapping(aCallback, aContext, aOrder) { var context = aContext || null; var order = aOrder || SourceMapConsumer.GENERATED_ORDER; var mappings; switch (order) { case SourceMapConsumer.GENERATED_ORDER: mappings = this._generatedMappings; break; case SourceMapConsumer.ORIGINAL_ORDER: mappings = this._originalMappings; break; default: throw new Error("Unknown order of iteration."); } var sourceRoot = this.sourceRoot; mappings.map(function (mapping) { var source = mapping.source === null ? null : this._sources.at(mapping.source); if (source != null && sourceRoot != null) { source = util.join(sourceRoot, source); } return { source: source, generatedLine: mapping.generatedLine, generatedColumn: mapping.generatedColumn, originalLine: mapping.originalLine, originalColumn: mapping.originalColumn, name: mapping.name === null ? null : this._names.at(mapping.name) }; }, this).forEach(aCallback, context); }; /** * 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. * - column: Optional. the column number in the original source. * * and an array of objects is returned, each with the following properties: * * - line: The line number in the generated source, or null. * - column: The column number in the generated source, or null. */ SourceMapConsumer.prototype.allGeneratedPositionsFor = function SourceMapConsumer_allGeneratedPositionsFor(aArgs) { var line = util.getArg(aArgs, 'line'); // When there is no exact match, BasicSourceMapConsumer.prototype._findMapping // returns the index of the closest mapping less than the needle. By // setting needle.originalColumn to 0, we thus find the last mapping for // the given line, provided such a mapping exists. var needle = { source: util.getArg(aArgs, 'source'), originalLine: line, originalColumn: util.getArg(aArgs, 'column', 0) }; if (this.sourceRoot != null) { needle.source = util.relative(this.sourceRoot, needle.source); } if (!this._sources.has(needle.source)) { return []; } needle.source = this._sources.indexOf(needle.source); var mappings = []; var index = this._findMapping(needle, this._originalMappings, "originalLine", "originalColumn", util.compareByOriginalPositions, binarySearch.LEAST_UPPER_BOUND); if (index >= 0) { var mapping = this._originalMappings[index]; if (aArgs.column === undefined) { var originalLine = mapping.originalLine; // Iterate until either we run out of mappings, or we run into // a mapping for a different line than the one we found. Since // mappings are sorted, this is guaranteed to find all mappings for // the line we found. while (mapping && mapping.originalLine === originalLine) { mappings.push({ line: util.getArg(mapping, 'generatedLine', null), column: util.getArg(mapping, 'generatedColumn', null), lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null) }); mapping = this._originalMappings[++index]; } } else { var originalColumn = mapping.originalColumn; // Iterate until either we run out of mappings, or we run into // a mapping for a different line than the one we were searching for. // Since mappings are sorted, this is guaranteed to find all mappings for // the line we are searching for. while (mapping && mapping.originalLine === line && mapping.originalColumn == originalColumn) { mappings.push({ line: util.getArg(mapping, 'generatedLine', null), column: util.getArg(mapping, 'generatedColumn', null), lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null) }); mapping = this._originalMappings[++index]; } } } return mappings; }; 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 only 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 referrenced 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;" * } * * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit?pli=1# */ function BasicSourceMapConsumer(aSourceMap) { var sourceMap = aSourceMap; if (typeof aSourceMap === 'string') { sourceMap = JSON.parse(aSourceMap.replace(/^\)\]\}'/, '')); } var version = util.getArg(sourceMap, 'version'); var sources = util.getArg(sourceMap, 'sources'); // Sass 3.3 leaves out the 'names' array, so we deviate from the spec (which // requires the array) to play nice here. var names = util.getArg(sourceMap, 'names', []); var sourceRoot = util.getArg(sourceMap, 'sourceRoot', null); var sourcesContent = util.getArg(sourceMap, 'sourcesContent', null); var mappings = util.getArg(sourceMap, 'mappings'); var file = util.getArg(sourceMap, 'file', 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 != this._version) { throw new Error('Unsupported version: ' + version); } sources = sources .map(String) // Some source maps produce relative source paths like "./foo.js" instead of // "foo.js". Normalize these first so that future comparisons will succeed. // See bugzil.la/1090768. .map(util.normalize) // Always ensure that absolute sources are internally stored relative to // the source root, if the source root is absolute. Not doing this would // be particularly problematic when the source root is a prefix of the // source (valid, but why??). See github issue #199 and bugzil.la/1188982. .map(function (source) { return sourceRoot && util.isAbsolute(sourceRoot) && util.isAbsolute(source) ? util.relative(sourceRoot, source) : source; }); // 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. this._names = ArraySet.fromArray(names.map(String), true); this._sources = ArraySet.fromArray(sources, true); this.sourceRoot = sourceRoot; this.sourcesContent = sourcesContent; this._mappings = mappings; this.file = file; } BasicSourceMapConsumer.prototype = Object.create(SourceMapConsumer.prototype); BasicSourceMapConsumer.prototype.consumer = SourceMapConsumer; /** * Create a BasicSourceMapConsumer from a SourceMapGenerator. * * @param SourceMapGenerator aSourceMap * The source map that will be consumed. * @returns BasicSourceMapConsumer */ BasicSourceMapConsumer.fromSourceMap = function SourceMapConsumer_fromSourceMap(aSourceMap) { var smc = Object.create(BasicSourceMapConsumer.prototype); var names = smc._names = ArraySet.fromArray(aSourceMap._names.toArray(), true); var sources = smc._sources = ArraySet.fromArray(aSourceMap._sources.toArray(), true); smc.sourceRoot = aSourceMap._sourceRoot; smc.sourcesContent = aSourceMap._generateSourcesContent(smc._sources.toArray(), smc.sourceRoot); smc.file = aSourceMap._file; // Because we are modifying the entries (by converting string sources and // names to indices into the sources and names ArraySets), we have to make // a copy of the entry or else bad things happen. Shared mutable state // strikes again! See github issue #191. var generatedMappings = aSourceMap._mappings.toArray().slice(); var destGeneratedMappings = smc.__generatedMappings = []; var destOriginalMappings = smc.__originalMappings = []; for (var i = 0, length = generatedMappings.length; i < length; i++) { var srcMapping = generatedMappings[i]; var destMapping = new Mapping; destMapping.generatedLine = srcMapping.generatedLine; destMapping.generatedColumn = srcMapping.generatedColumn; if (srcMapping.source) { destMapping.source = sources.indexOf(srcMapping.source); destMapping.originalLine = srcMapping.originalLine; destMapping.originalColumn = srcMapping.originalColumn; if (srcMapping.name) { destMapping.name = names.indexOf(srcMapping.name); } destOriginalMappings.push(destMapping); } destGeneratedMappings.push(destMapping); } quickSort(smc.__originalMappings, util.compareByOriginalPositions); return smc; }; /** * The version of the source mapping spec that we are consuming. */ BasicSourceMapConsumer.prototype._version = 3; /** * The list of original sources. */ Object.defineProperty(BasicSourceMapConsumer.prototype, 'sources', { get: function () { return this._sources.toArray().map(function (s) { return this.sourceRoot != null ? util.join(this.sourceRoot, s) : s; }, this); } }); /** * Provide the JIT with a nice shape / hidden class. */ function Mapping() { this.generatedLine = 0; this.generatedColumn = 0; this.source = null; this.originalLine = null; this.originalColumn = null; this.name = null; } /** * 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). */ BasicSourceMapConsumer.prototype._parseMappings = function SourceMapConsumer_parseMappings(aStr, aSourceRoot) { var generatedLine = 1; var previousGeneratedColumn = 0; var previousOriginalLine = 0; var previousOriginalColumn = 0; var previousSource = 0; var previousName = 0; var length = aStr.length; var index = 0; var cachedSegments = {}; var temp = {}; var originalMappings = []; var generatedMappings = []; var mapping, str, segment, end, value; while (index < length) { if (aStr.charAt(index) === ';') { generatedLine++; index++; previousGeneratedColumn = 0; } else if (aStr.charAt(index) === ',') { index++; } else { mapping = new Mapping(); mapping.generatedLine = generatedLine; // Because each offset is encoded relative to the previous one, // many segments often have the same encoding. We can exploit this // fact by caching the parsed variable length fields of each segment, // allowing us to avoid a second parse if we encounter the same // segment again. for (end = index; end < length; end++) { if (this._charIsMappingSeparator(aStr, end)) { break; } } str = aStr.slice(index, end); segment = cachedSegments[str]; if (segment) { index += str.length; } else { segment = []; while (index < end) { base64VLQ.decode(aStr, index, temp); value = temp.value; index = temp.rest; segment.push(value); } if (segment.length === 2) { throw new Error('Found a source, but no line and column'); } if (segment.length === 3) { throw new Error('Found a source and line, but no column'); } cachedSegments[str] = segment; } // Generated column. mapping.generatedColumn = previousGeneratedColumn + segment[0]; previousGeneratedColumn = mapping.generatedColumn; if (segment.length > 1) { // Original source. mapping.source = previousSource + segment[1]; previousSource += segment[1]; // Original line. mapping.originalLine = previousOriginalLine + segment[2]; previousOriginalLine = mapping.originalLine; // Lines are stored 0-based mapping.originalLine += 1; // Original column. mapping.originalColumn = previousOriginalColumn + segment[3]; previousOriginalColumn = mapping.originalColumn; if (segment.length > 4) { // Original name. mapping.name = previousName + segment[4]; previousName += segment[4]; } } generatedMappings.push(mapping); if (typeof mapping.originalLine === 'number') { originalMappings.push(mapping); } } } quickSort(generatedMappings, util.compareByGeneratedPositionsDeflated); this.__generatedMappings = generatedMappings; quickSort(originalMappings, util.compareByOriginalPositions); this.__originalMappings = originalMappings; }; /** * Find the mapping that best matches the hypothetical "needle" mapping that * we are searching for in the given "haystack" of mappings. */ BasicSourceMapConsumer.prototype._findMapping = function SourceMapConsumer_findMapping(aNeedle, aMappings, aLineName, aColumnName, aComparator, aBias) { // To return the position we are searching for, we must first find the // mapping for the given position and then return the opposite position it // points to. Because the mappings are sorted, we can use binary search to // find the best mapping. if (aNeedle[aLineName] <= 0) { throw new TypeError('Line must be greater than or equal to 1, got ' + aNeedle[aLineName]); } if (aNeedle[aColumnName] < 0) { throw new TypeError('Column must be greater than or equal to 0, got ' + aNeedle[aColumnName]); } return binarySearch.search(aNeedle, aMappings, aComparator, aBias); }; /** * Compute the last column for each generated mapping. The last column is * inclusive. */ BasicSourceMapConsumer.prototype.computeColumnSpans = function SourceMapConsumer_computeColumnSpans() { for (var index = 0; index < this._generatedMappings.length; ++index) { var mapping = this._generatedMappings[index]; // Mappings do not contain a field for the last generated columnt. We // can come up with an optimistic estimate, however, by assuming that // mappings are contiguous (i.e. given two consecutive mappings, the // first mapping ends where the second one starts). if (index + 1 < this._generatedMappings.length) { var nextMapping = this._generatedMappings[index + 1]; if (mapping.generatedLine === nextMapping.generatedLine) { mapping.lastGeneratedColumn = nextMapping.generatedColumn - 1; continue; } } // The last mapping for each line spans the entire line. mapping.lastGeneratedColumn = Infinity; } }; /** * 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. * - column: The column number in the generated source. * - 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. * - column: The column number in the original source, or null. * - name: The original identifier, or null. */ BasicSourceMapConsumer.prototype.originalPositionFor = function SourceMapConsumer_originalPositionFor(aArgs) { var needle = { generatedLine: util.getArg(aArgs, 'line'), generatedColumn: util.getArg(aArgs, 'column') }; var index = this._findMapping( needle, this._generatedMappings, "generatedLine", "generatedColumn", util.compareByGeneratedPositionsDeflated, util.getArg(aArgs, 'bias', SourceMapConsumer.GREATEST_LOWER_BOUND) ); if (index >= 0) { var mapping = this._generatedMappings[index]; if (mapping.generatedLine === needle.generatedLine) { var source = util.getArg(mapping, 'source', null); if (source !== null) { source = this._sources.at(source); if (this.sourceRoot != null) { source = util.join(this.sourceRoot, source); } } var name = util.getArg(mapping, 'name', null); if (name !== null) { name = this._names.at(name); } return { source: source, line: util.getArg(mapping, 'originalLine', null), column: util.getArg(mapping, 'originalColumn', null), name: 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. */ BasicSourceMapConsumer.prototype.hasContentsOfAllSources = function BasicSourceMapConsumer_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. */ BasicSourceMapConsumer.prototype.sourceContentFor = function SourceMapConsumer_sourceContentFor(aSource, nullOnMissing) { if (!this.sourcesContent) { return null; } if (this.sourceRoot != null) { aSource = util.relative(this.sourceRoot, aSource); } if (this._sources.has(aSource)) { return this.sourcesContent[this._sources.indexOf(aSource)]; } var url; if (this.sourceRoot != null && (url = util.urlParse(this.sourceRoot))) { // XXX: file:// URIs and absolute paths lead to unexpected behavior for // many users. We can help them out when they expect file:// URIs to // behave like it would if they were running a local HTTP server. See // https://bugzilla.mozilla.org/show_bug.cgi?id=885597. var fileUriAbsPath = aSource.replace(/^file:\/\//, ""); if (url.scheme == "file" && this._sources.has(fileUriAbsPath)) { return this.sourcesContent[this._sources.indexOf(fileUriAbsPath)] } if ((!url.path || url.path == "/") && this._sources.has("/" + aSource)) { return this.sourcesContent[this._sources.indexOf("/" + aSource)]; } } // 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; } else { 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. * - column: The column number in the original source. * - 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. * - column: The column number in the generated source, or null. */ BasicSourceMapConsumer.prototype.generatedPositionFor = function SourceMapConsumer_generatedPositionFor(aArgs) { var source = util.getArg(aArgs, 'source'); if (this.sourceRoot != null) { source = util.relative(this.sourceRoot, source); } if (!this._sources.has(source)) { return { line: null, column: null, lastColumn: null }; } source = this._sources.indexOf(source); var needle = { source: source, originalLine: util.getArg(aArgs, 'line'), originalColumn: util.getArg(aArgs, 'column') }; var index = this._findMapping( needle, this._originalMappings, "originalLine", "originalColumn", util.compareByOriginalPositions, util.getArg(aArgs, 'bias', SourceMapConsumer.GREATEST_LOWER_BOUND) ); if (index >= 0) { var mapping = this._originalMappings[index]; if (mapping.source === needle.source) { return { line: util.getArg(mapping, 'generatedLine', null), column: util.getArg(mapping, 'generatedColumn', null), lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null) }; } } return { line: null, column: null, lastColumn: null }; }; 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 only 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;" * } * }], * } * * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit#heading=h.535es3xeprgt */ function IndexedSourceMapConsumer(aSourceMap) { var sourceMap = aSourceMap; if (typeof aSourceMap === 'string') { sourceMap = JSON.parse(aSourceMap.replace(/^\)\]\}'/, '')); } var version = util.getArg(sourceMap, 'version'); var sections = util.getArg(sourceMap, 'sections'); if (version != this._version) { throw new Error('Unsupported version: ' + version); } this._sources = new ArraySet(); this._names = new ArraySet(); var lastOffset = { line: -1, column: 0 }; this._sections = sections.map(function (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.'); } var offset = util.getArg(s, 'offset'); var offsetLine = util.getArg(offset, 'line'); var 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; 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: new SourceMapConsumer(util.getArg(s, 'map')) } }); } IndexedSourceMapConsumer.prototype = Object.create(SourceMapConsumer.prototype); IndexedSourceMapConsumer.prototype.constructor = SourceMapConsumer; /** * The version of the source mapping spec that we are consuming. */ IndexedSourceMapConsumer.prototype._version = 3; /** * The list of original sources. */ Object.defineProperty(IndexedSourceMapConsumer.prototype, 'sources', { get: function () { var sources = []; for (var i = 0; i < this._sections.length; i++) { for (var 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. * - column: The column number in the generated source. * * 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. * - column: The column number in the original source, or null. * - name: The original identifier, or null. */ IndexedSourceMapConsumer.prototype.originalPositionFor = function IndexedSourceMapConsumer_originalPositionFor(aArgs) { var 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. var sectionIndex = binarySearch.search(needle, this._sections, function(needle, section) { var cmp = needle.generatedLine - section.generatedOffset.generatedLine; if (cmp) { return cmp; } return (needle.generatedColumn - section.generatedOffset.generatedColumn); }); var 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. */ IndexedSourceMapConsumer.prototype.hasContentsOfAllSources = function IndexedSourceMapConsumer_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. */ IndexedSourceMapConsumer.prototype.sourceContentFor = function IndexedSourceMapConsumer_sourceContentFor(aSource, nullOnMissing) { for (var i = 0; i < this._sections.length; i++) { var section = this._sections[i]; var content = section.consumer.sourceContentFor(aSource, true); if (content) { return content; } } if (nullOnMissing) { return null; } else { 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. * - column: The column number in the original source. * * and an object is returned with the following properties: * * - line: The line number in the generated source, or null. * - column: The column number in the generated source, or null. */ IndexedSourceMapConsumer.prototype.generatedPositionFor = function IndexedSourceMapConsumer_generatedPositionFor(aArgs) { for (var i = 0; i < this._sections.length; i++) { var section = this._sections[i]; // Only consider this section if the requested source is in the list of // sources of the consumer. if (section.consumer.sources.indexOf(util.getArg(aArgs, 'source')) === -1) { continue; } var generatedPosition = section.consumer.generatedPositionFor(aArgs); if (generatedPosition) { var ret = { line: generatedPosition.line + (section.generatedOffset.generatedLine - 1), column: generatedPosition.column + (section.generatedOffset.generatedLine === generatedPosition.line ? section.generatedOffset.generatedColumn - 1 : 0) }; return ret; } } return { line: null, column: null }; }; /** * 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). */ IndexedSourceMapConsumer.prototype._parseMappings = function IndexedSourceMapConsumer_parseMappings(aStr, aSourceRoot) { this.__generatedMappings = []; this.__originalMappings = []; for (var i = 0; i < this._sections.length; i++) { var section = this._sections[i]; var sectionMappings = section.consumer._generatedMappings; for (var j = 0; j < sectionMappings.length; j++) { var mapping = sectionMappings[j]; var source = section.consumer._sources.at(mapping.source); if (section.consumer.sourceRoot !== null) { source = util.join(section.consumer.sourceRoot, source); } this._sources.add(source); source = this._sources.indexOf(source); var name = section.consumer._names.at(mapping.name); this._names.add(name); name = this._names.indexOf(name); // The mappings coming from the consumer for the section have // generated positions relative to the start of the section, so we // need to offset them to be relative to the start of the concatenated // generated file. var adjustedMapping = { source: source, generatedLine: mapping.generatedLine + (section.generatedOffset.generatedLine - 1), generatedColumn: mapping.generatedColumn + (section.generatedOffset.generatedLine === mapping.generatedLine ? section.generatedOffset.generatedColumn - 1 : 0), originalLine: mapping.originalLine, originalColumn: mapping.originalColumn, name: name }; this.__generatedMappings.push(adjustedMapping); if (typeof adjustedMapping.originalLine === 'number') { this.__originalMappings.push(adjustedMapping); } } } quickSort(this.__generatedMappings, util.compareByGeneratedPositionsDeflated); quickSort(this.__originalMappings, util.compareByOriginalPositions); }; exports.IndexedSourceMapConsumer = IndexedSourceMapConsumer;