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236 lines
11 KiB
236 lines
11 KiB
(function (global, factory) { |
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typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@jridgewell/set-array'), require('@jridgewell/sourcemap-codec'), require('@jridgewell/trace-mapping')) : |
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typeof define === 'function' && define.amd ? define(['exports', '@jridgewell/set-array', '@jridgewell/sourcemap-codec', '@jridgewell/trace-mapping'], factory) : |
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(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.genMapping = {}, global.setArray, global.sourcemapCodec, global.traceMapping)); |
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})(this, (function (exports, setArray, sourcemapCodec, traceMapping) { 'use strict'; |
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const COLUMN = 0; |
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const SOURCES_INDEX = 1; |
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const SOURCE_LINE = 2; |
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const SOURCE_COLUMN = 3; |
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const NAMES_INDEX = 4; |
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const NO_NAME = -1; |
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/** |
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* A low-level API to associate a generated position with an original source position. Line and |
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* column here are 0-based, unlike `addMapping`. |
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*/ |
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exports.addSegment = void 0; |
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/** |
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* A high-level API to associate a generated position with an original source position. Line is |
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* 1-based, but column is 0-based, due to legacy behavior in `source-map` library. |
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*/ |
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exports.addMapping = void 0; |
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/** |
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* Same as `addSegment`, but will only add the segment if it generates useful information in the |
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* resulting map. This only works correctly if segments are added **in order**, meaning you should |
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* not add a segment with a lower generated line/column than one that came before. |
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*/ |
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exports.maybeAddSegment = void 0; |
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/** |
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* Same as `addMapping`, but will only add the mapping if it generates useful information in the |
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* resulting map. This only works correctly if mappings are added **in order**, meaning you should |
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* not add a mapping with a lower generated line/column than one that came before. |
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*/ |
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exports.maybeAddMapping = void 0; |
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/** |
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* Adds/removes the content of the source file to the source map. |
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*/ |
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exports.setSourceContent = void 0; |
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/** |
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* Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects |
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* a sourcemap, or to JSON.stringify. |
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*/ |
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exports.toDecodedMap = void 0; |
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/** |
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* Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects |
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* a sourcemap, or to JSON.stringify. |
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*/ |
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exports.toEncodedMap = void 0; |
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/** |
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* Constructs a new GenMapping, using the already present mappings of the input. |
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*/ |
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exports.fromMap = void 0; |
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/** |
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* Returns an array of high-level mapping objects for every recorded segment, which could then be |
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* passed to the `source-map` library. |
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*/ |
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exports.allMappings = void 0; |
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// This split declaration is only so that terser can elminiate the static initialization block. |
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let addSegmentInternal; |
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/** |
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* Provides the state to generate a sourcemap. |
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*/ |
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class GenMapping { |
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constructor({ file, sourceRoot } = {}) { |
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this._names = new setArray.SetArray(); |
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this._sources = new setArray.SetArray(); |
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this._sourcesContent = []; |
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this._mappings = []; |
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this.file = file; |
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this.sourceRoot = sourceRoot; |
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} |
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} |
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(() => { |
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exports.addSegment = (map, genLine, genColumn, source, sourceLine, sourceColumn, name, content) => { |
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return addSegmentInternal(false, map, genLine, genColumn, source, sourceLine, sourceColumn, name, content); |
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}; |
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exports.maybeAddSegment = (map, genLine, genColumn, source, sourceLine, sourceColumn, name, content) => { |
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return addSegmentInternal(true, map, genLine, genColumn, source, sourceLine, sourceColumn, name, content); |
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}; |
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exports.addMapping = (map, mapping) => { |
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return addMappingInternal(false, map, mapping); |
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}; |
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exports.maybeAddMapping = (map, mapping) => { |
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return addMappingInternal(true, map, mapping); |
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}; |
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exports.setSourceContent = (map, source, content) => { |
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const { _sources: sources, _sourcesContent: sourcesContent } = map; |
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sourcesContent[setArray.put(sources, source)] = content; |
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}; |
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exports.toDecodedMap = (map) => { |
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const { file, sourceRoot, _mappings: mappings, _sources: sources, _sourcesContent: sourcesContent, _names: names, } = map; |
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removeEmptyFinalLines(mappings); |
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return { |
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version: 3, |
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file: file || undefined, |
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names: names.array, |
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sourceRoot: sourceRoot || undefined, |
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sources: sources.array, |
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sourcesContent, |
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mappings, |
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}; |
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}; |
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exports.toEncodedMap = (map) => { |
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const decoded = exports.toDecodedMap(map); |
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return Object.assign(Object.assign({}, decoded), { mappings: sourcemapCodec.encode(decoded.mappings) }); |
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}; |
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exports.allMappings = (map) => { |
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const out = []; |
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const { _mappings: mappings, _sources: sources, _names: names } = map; |
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for (let i = 0; i < mappings.length; i++) { |
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const line = mappings[i]; |
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for (let j = 0; j < line.length; j++) { |
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const seg = line[j]; |
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const generated = { line: i + 1, column: seg[COLUMN] }; |
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let source = undefined; |
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let original = undefined; |
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let name = undefined; |
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if (seg.length !== 1) { |
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source = sources.array[seg[SOURCES_INDEX]]; |
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original = { line: seg[SOURCE_LINE] + 1, column: seg[SOURCE_COLUMN] }; |
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if (seg.length === 5) |
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name = names.array[seg[NAMES_INDEX]]; |
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} |
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out.push({ generated, source, original, name }); |
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} |
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} |
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return out; |
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}; |
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exports.fromMap = (input) => { |
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const map = new traceMapping.TraceMap(input); |
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const gen = new GenMapping({ file: map.file, sourceRoot: map.sourceRoot }); |
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putAll(gen._names, map.names); |
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putAll(gen._sources, map.sources); |
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gen._sourcesContent = map.sourcesContent || map.sources.map(() => null); |
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gen._mappings = traceMapping.decodedMappings(map); |
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return gen; |
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}; |
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// Internal helpers |
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addSegmentInternal = (skipable, map, genLine, genColumn, source, sourceLine, sourceColumn, name, content) => { |
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const { _mappings: mappings, _sources: sources, _sourcesContent: sourcesContent, _names: names, } = map; |
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const line = getLine(mappings, genLine); |
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const index = getColumnIndex(line, genColumn); |
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if (!source) { |
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if (skipable && skipSourceless(line, index)) |
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return; |
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return insert(line, index, [genColumn]); |
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} |
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const sourcesIndex = setArray.put(sources, source); |
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const namesIndex = name ? setArray.put(names, name) : NO_NAME; |
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if (sourcesIndex === sourcesContent.length) |
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sourcesContent[sourcesIndex] = content !== null && content !== void 0 ? content : null; |
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if (skipable && skipSource(line, index, sourcesIndex, sourceLine, sourceColumn, namesIndex)) { |
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return; |
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} |
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return insert(line, index, name |
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? [genColumn, sourcesIndex, sourceLine, sourceColumn, namesIndex] |
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: [genColumn, sourcesIndex, sourceLine, sourceColumn]); |
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}; |
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})(); |
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function getLine(mappings, index) { |
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for (let i = mappings.length; i <= index; i++) { |
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mappings[i] = []; |
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} |
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return mappings[index]; |
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} |
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function getColumnIndex(line, genColumn) { |
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let index = line.length; |
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for (let i = index - 1; i >= 0; index = i--) { |
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const current = line[i]; |
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if (genColumn >= current[COLUMN]) |
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break; |
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} |
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return index; |
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} |
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function insert(array, index, value) { |
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for (let i = array.length; i > index; i--) { |
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array[i] = array[i - 1]; |
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} |
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array[index] = value; |
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} |
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function removeEmptyFinalLines(mappings) { |
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const { length } = mappings; |
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let len = length; |
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for (let i = len - 1; i >= 0; len = i, i--) { |
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if (mappings[i].length > 0) |
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break; |
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} |
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if (len < length) |
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mappings.length = len; |
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} |
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function putAll(strarr, array) { |
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for (let i = 0; i < array.length; i++) |
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setArray.put(strarr, array[i]); |
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} |
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function skipSourceless(line, index) { |
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// The start of a line is already sourceless, so adding a sourceless segment to the beginning |
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// doesn't generate any useful information. |
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if (index === 0) |
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return true; |
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const prev = line[index - 1]; |
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// If the previous segment is also sourceless, then adding another sourceless segment doesn't |
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// genrate any new information. Else, this segment will end the source/named segment and point to |
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// a sourceless position, which is useful. |
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return prev.length === 1; |
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} |
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function skipSource(line, index, sourcesIndex, sourceLine, sourceColumn, namesIndex) { |
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// A source/named segment at the start of a line gives position at that genColumn |
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if (index === 0) |
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return false; |
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const prev = line[index - 1]; |
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// If the previous segment is sourceless, then we're transitioning to a source. |
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if (prev.length === 1) |
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return false; |
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// If the previous segment maps to the exact same source position, then this segment doesn't |
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// provide any new position information. |
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return (sourcesIndex === prev[SOURCES_INDEX] && |
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sourceLine === prev[SOURCE_LINE] && |
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sourceColumn === prev[SOURCE_COLUMN] && |
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namesIndex === (prev.length === 5 ? prev[NAMES_INDEX] : NO_NAME)); |
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} |
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function addMappingInternal(skipable, map, mapping) { |
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const { generated, source, original, name, content } = mapping; |
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if (!source) { |
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return addSegmentInternal(skipable, map, generated.line - 1, generated.column, null, null, null, null, null); |
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} |
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const s = source; |
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return addSegmentInternal(skipable, map, generated.line - 1, generated.column, s, original.line - 1, original.column, name, content); |
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} |
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exports.GenMapping = GenMapping; |
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Object.defineProperty(exports, '__esModule', { value: true }); |
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})); |
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//# sourceMappingURL=gen-mapping.umd.js.map
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