diff options
Diffstat (limited to 'node_modules/source-map/lib/source-map-generator.js')
| -rw-r--r-- | node_modules/source-map/lib/source-map-generator.js | 333 |
1 files changed, 165 insertions, 168 deletions
diff --git a/node_modules/source-map/lib/source-map-generator.js b/node_modules/source-map/lib/source-map-generator.js index aff1e7fb..8111e061 100644 --- a/node_modules/source-map/lib/source-map-generator.js +++ b/node_modules/source-map/lib/source-map-generator.js @@ -5,10 +5,10 @@ * http://opensource.org/licenses/BSD-3-Clause */ -var base64VLQ = require('./base64-vlq'); -var util = require('./util'); -var ArraySet = require('./array-set').ArraySet; -var MappingList = require('./mapping-list').MappingList; +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 @@ -18,35 +18,33 @@ var MappingList = require('./mapping-list').MappingList; * - file: The filename of the generated source. * - sourceRoot: A root for all relative URLs in this source map. */ -function SourceMapGenerator(aArgs) { - if (!aArgs) { - aArgs = {}; +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; } - 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; -} - -SourceMapGenerator.prototype._version = 3; -/** - * Creates a new SourceMapGenerator based on a SourceMapConsumer - * - * @param aSourceMapConsumer The SourceMap. - */ -SourceMapGenerator.fromSourceMap = - function SourceMapGenerator_fromSourceMap(aSourceMapConsumer) { - var sourceRoot = aSourceMapConsumer.sourceRoot; - var generator = new SourceMapGenerator({ + /** + * 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: sourceRoot + sourceRoot }); - aSourceMapConsumer.eachMapping(function (mapping) { - var newMapping = { + aSourceMapConsumer.eachMapping(function(mapping) { + const newMapping = { generated: { line: mapping.generatedLine, column: mapping.generatedColumn @@ -71,31 +69,39 @@ SourceMapGenerator.fromSourceMap = generator.addMapping(newMapping); }); - aSourceMapConsumer.sources.forEach(function (sourceFile) { - var content = aSourceMapConsumer.sourceContentFor(sourceFile); + 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. - */ -SourceMapGenerator.prototype.addMapping = - function SourceMapGenerator_addMapping(aArgs) { - var generated = util.getArg(aArgs, 'generated'); - var original = util.getArg(aArgs, 'original', null); - var source = util.getArg(aArgs, 'source', null); - var name = util.getArg(aArgs, 'name', null); + /** + * 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); @@ -120,17 +126,16 @@ SourceMapGenerator.prototype.addMapping = generatedColumn: generated.column, originalLine: original != null && original.line, originalColumn: original != null && original.column, - source: source, - name: name + source, + name }); - }; + } -/** - * Set the source content for a source file. - */ -SourceMapGenerator.prototype.setSourceContent = - function SourceMapGenerator_setSourceContent(aSourceFile, aSourceContent) { - var source = aSourceFile; + /** + * Set the source content for a source file. + */ + setSourceContent(aSourceFile, aSourceContent) { + let source = aSourceFile; if (this._sourceRoot != null) { source = util.relative(this._sourceRoot, source); } @@ -150,52 +155,53 @@ SourceMapGenerator.prototype.setSourceContent = 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. - */ -SourceMapGenerator.prototype.applySourceMap = - function SourceMapGenerator_applySourceMap(aSourceMapConsumer, aSourceFile, aSourceMapPath) { - var sourceFile = aSourceFile; + /** + * 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, ' + + "SourceMapGenerator.prototype.applySourceMap requires either an explicit source file, " + 'or the source map\'s "file" property. Both were omitted.' ); } sourceFile = aSourceMapConsumer.file; } - var sourceRoot = this._sourceRoot; + 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. - var newSources = new ArraySet(); - var newNames = new ArraySet(); + 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) { + 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. - var original = aSourceMapConsumer.originalPositionFor({ + const original = aSourceMapConsumer.originalPositionFor({ line: mapping.originalLine, column: mapping.originalColumn }); @@ -203,7 +209,7 @@ SourceMapGenerator.prototype.applySourceMap = // Copy mapping mapping.source = original.source; if (aSourceMapPath != null) { - mapping.source = util.join(aSourceMapPath, mapping.source) + mapping.source = util.join(aSourceMapPath, mapping.source); } if (sourceRoot != null) { mapping.source = util.relative(sourceRoot, mapping.source); @@ -216,12 +222,12 @@ SourceMapGenerator.prototype.applySourceMap = } } - var source = mapping.source; + const source = mapping.source; if (source != null && !newSources.has(source)) { newSources.add(source); } - var name = mapping.name; + const name = mapping.name; if (name != null && !newNames.has(name)) { newNames.add(name); } @@ -231,107 +237,99 @@ SourceMapGenerator.prototype.applySourceMap = this._names = newNames; // Copy sourcesContents of applied map. - aSourceMapConsumer.sources.forEach(function (sourceFile) { - var content = aSourceMapConsumer.sourceContentFor(sourceFile); + aSourceMapConsumer.sources.forEach(function(srcFile) { + const content = aSourceMapConsumer.sourceContentFor(srcFile); if (content != null) { if (aSourceMapPath != null) { - sourceFile = util.join(aSourceMapPath, sourceFile); + srcFile = util.join(aSourceMapPath, srcFile); } if (sourceRoot != null) { - sourceFile = util.relative(sourceRoot, sourceFile); + srcFile = util.relative(sourceRoot, srcFile); } - this.setSourceContent(sourceFile, content); + 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. - */ -SourceMapGenerator.prototype._validateMapping = - function SourceMapGenerator_validateMapping(aGenerated, aOriginal, aSource, - aName) { + /** + * 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') { + 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.' + "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 + if (aGenerated && "line" in aGenerated && "column" in aGenerated && aGenerated.line > 0 && aGenerated.column >= 0 && !aOriginal && !aSource && !aName) { // Case 1. - return; - } - else if (aGenerated && 'line' in aGenerated && 'column' in aGenerated - && aOriginal && 'line' in aOriginal && 'column' in aOriginal + + } 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. - return; - } - else { - throw new Error('Invalid mapping: ' + JSON.stringify({ + + } 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. - */ -SourceMapGenerator.prototype._serializeMappings = - function SourceMapGenerator_serializeMappings() { - var previousGeneratedColumn = 0; - var previousGeneratedLine = 1; - var previousOriginalColumn = 0; - var previousOriginalLine = 0; - var previousName = 0; - var previousSource = 0; - var result = ''; - var next; - var mapping; - var nameIdx; - var sourceIdx; - - var mappings = this._mappings.toArray(); - for (var i = 0, len = mappings.length; i < len; i++) { + /** + * 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 = '' + next = ""; if (mapping.generatedLine !== previousGeneratedLine) { previousGeneratedColumn = 0; while (mapping.generatedLine !== previousGeneratedLine) { - next += ';'; + next += ";"; previousGeneratedLine++; } - } - else { - if (i > 0) { - if (!util.compareByGeneratedPositionsInflated(mapping, mappings[i - 1])) { - continue; - } - next += ','; + } else if (i > 0) { + if (!util.compareByGeneratedPositionsInflated(mapping, mappings[i - 1])) { + continue; } + next += ","; } next += base64VLQ.encode(mapping.generatedColumn @@ -363,30 +361,28 @@ SourceMapGenerator.prototype._serializeMappings = } return result; - }; + } -SourceMapGenerator.prototype._generateSourcesContent = - function SourceMapGenerator_generateSourcesContent(aSources, aSourceRoot) { - return aSources.map(function (source) { + _generateSourcesContent(aSources, aSourceRoot) { + return aSources.map(function(source) { if (!this._sourcesContents) { return null; } if (aSourceRoot != null) { source = util.relative(aSourceRoot, source); } - var key = util.toSetString(source); + const key = util.toSetString(source); return Object.prototype.hasOwnProperty.call(this._sourcesContents, key) ? this._sourcesContents[key] : null; }, this); - }; + } -/** - * Externalize the source map. - */ -SourceMapGenerator.prototype.toJSON = - function SourceMapGenerator_toJSON() { - var map = { + /** + * Externalize the source map. + */ + toJSON() { + const map = { version: this._version, sources: this._sources.toArray(), names: this._names.toArray(), @@ -403,14 +399,15 @@ SourceMapGenerator.prototype.toJSON = } return map; - }; + } -/** - * Render the source map being generated to a string. - */ -SourceMapGenerator.prototype.toString = - function SourceMapGenerator_toString() { + /** + * Render the source map being generated to a string. + */ + toString() { return JSON.stringify(this.toJSON()); - }; + } +} +SourceMapGenerator.prototype._version = 3; exports.SourceMapGenerator = SourceMapGenerator; |