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| Viewing file: Select action/file-type: /* -*- 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<this>.
// 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);
// 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._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;
const mappingsBufPtr = this._wasm.exports.allocate_mappings(size);
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 `fitzgen/source-map-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;
}
return (aNeedle.generatedColumn -
section.generatedOffset.generatedColumn);
});
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);
}
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