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| author | Philipp Tanlak <philipp.tanlak@gmail.com> | 2025-11-24 20:54:57 +0100 |
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| committer | Philipp Tanlak <philipp.tanlak@gmail.com> | 2025-11-24 20:57:48 +0100 |
| commit | b1e2c8fd5cb5dfa46bc440a12eafaf56cd844b1c (patch) | |
| tree | 49d360fd6cbc6a2754efe93524ac47ff0fbe0f7d /node_modules/@jridgewell/gen-mapping/dist/gen-mapping.mjs | |
Docs
Diffstat (limited to 'node_modules/@jridgewell/gen-mapping/dist/gen-mapping.mjs')
| -rw-r--r-- | node_modules/@jridgewell/gen-mapping/dist/gen-mapping.mjs | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/node_modules/@jridgewell/gen-mapping/dist/gen-mapping.mjs b/node_modules/@jridgewell/gen-mapping/dist/gen-mapping.mjs new file mode 100644 index 0000000..5aeb5cc --- /dev/null +++ b/node_modules/@jridgewell/gen-mapping/dist/gen-mapping.mjs @@ -0,0 +1,230 @@ +import { SetArray, put } from '@jridgewell/set-array'; +import { encode } from '@jridgewell/sourcemap-codec'; +import { TraceMap, decodedMappings } from '@jridgewell/trace-mapping'; + +const COLUMN = 0; +const SOURCES_INDEX = 1; +const SOURCE_LINE = 2; +const SOURCE_COLUMN = 3; +const NAMES_INDEX = 4; + +const NO_NAME = -1; +/** + * A low-level API to associate a generated position with an original source position. Line and + * column here are 0-based, unlike `addMapping`. + */ +let addSegment; +/** + * A high-level API to associate a generated position with an original source position. Line is + * 1-based, but column is 0-based, due to legacy behavior in `source-map` library. + */ +let addMapping; +/** + * Same as `addSegment`, but will only add the segment if it generates useful information in the + * resulting map. This only works correctly if segments are added **in order**, meaning you should + * not add a segment with a lower generated line/column than one that came before. + */ +let maybeAddSegment; +/** + * Same as `addMapping`, but will only add the mapping if it generates useful information in the + * resulting map. This only works correctly if mappings are added **in order**, meaning you should + * not add a mapping with a lower generated line/column than one that came before. + */ +let maybeAddMapping; +/** + * Adds/removes the content of the source file to the source map. + */ +let setSourceContent; +/** + * Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects + * a sourcemap, or to JSON.stringify. + */ +let toDecodedMap; +/** + * Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects + * a sourcemap, or to JSON.stringify. + */ +let toEncodedMap; +/** + * Constructs a new GenMapping, using the already present mappings of the input. + */ +let fromMap; +/** + * Returns an array of high-level mapping objects for every recorded segment, which could then be + * passed to the `source-map` library. + */ +let allMappings; +// This split declaration is only so that terser can elminiate the static initialization block. +let addSegmentInternal; +/** + * Provides the state to generate a sourcemap. + */ +class GenMapping { + constructor({ file, sourceRoot } = {}) { + this._names = new SetArray(); + this._sources = new SetArray(); + this._sourcesContent = []; + this._mappings = []; + this.file = file; + this.sourceRoot = sourceRoot; + } +} +(() => { + addSegment = (map, genLine, genColumn, source, sourceLine, sourceColumn, name, content) => { + return addSegmentInternal(false, map, genLine, genColumn, source, sourceLine, sourceColumn, name, content); + }; + maybeAddSegment = (map, genLine, genColumn, source, sourceLine, sourceColumn, name, content) => { + return addSegmentInternal(true, map, genLine, genColumn, source, sourceLine, sourceColumn, name, content); + }; + addMapping = (map, mapping) => { + return addMappingInternal(false, map, mapping); + }; + maybeAddMapping = (map, mapping) => { + return addMappingInternal(true, map, mapping); + }; + setSourceContent = (map, source, content) => { + const { _sources: sources, _sourcesContent: sourcesContent } = map; + sourcesContent[put(sources, source)] = content; + }; + toDecodedMap = (map) => { + const { file, sourceRoot, _mappings: mappings, _sources: sources, _sourcesContent: sourcesContent, _names: names, } = map; + removeEmptyFinalLines(mappings); + return { + version: 3, + file: file || undefined, + names: names.array, + sourceRoot: sourceRoot || undefined, + sources: sources.array, + sourcesContent, + mappings, + }; + }; + toEncodedMap = (map) => { + const decoded = toDecodedMap(map); + return Object.assign(Object.assign({}, decoded), { mappings: encode(decoded.mappings) }); + }; + allMappings = (map) => { + const out = []; + const { _mappings: mappings, _sources: sources, _names: names } = map; + for (let i = 0; i < mappings.length; i++) { + const line = mappings[i]; + for (let j = 0; j < line.length; j++) { + const seg = line[j]; + const generated = { line: i + 1, column: seg[COLUMN] }; + let source = undefined; + let original = undefined; + let name = undefined; + if (seg.length !== 1) { + source = sources.array[seg[SOURCES_INDEX]]; + original = { line: seg[SOURCE_LINE] + 1, column: seg[SOURCE_COLUMN] }; + if (seg.length === 5) + name = names.array[seg[NAMES_INDEX]]; + } + out.push({ generated, source, original, name }); + } + } + return out; + }; + fromMap = (input) => { + const map = new TraceMap(input); + const gen = new GenMapping({ file: map.file, sourceRoot: map.sourceRoot }); + putAll(gen._names, map.names); + putAll(gen._sources, map.sources); + gen._sourcesContent = map.sourcesContent || map.sources.map(() => null); + gen._mappings = decodedMappings(map); + return gen; + }; + // Internal helpers + addSegmentInternal = (skipable, map, genLine, genColumn, source, sourceLine, sourceColumn, name, content) => { + const { _mappings: mappings, _sources: sources, _sourcesContent: sourcesContent, _names: names, } = map; + const line = getLine(mappings, genLine); + const index = getColumnIndex(line, genColumn); + if (!source) { + if (skipable && skipSourceless(line, index)) + return; + return insert(line, index, [genColumn]); + } + const sourcesIndex = put(sources, source); + const namesIndex = name ? put(names, name) : NO_NAME; + if (sourcesIndex === sourcesContent.length) + sourcesContent[sourcesIndex] = content !== null && content !== void 0 ? content : null; + if (skipable && skipSource(line, index, sourcesIndex, sourceLine, sourceColumn, namesIndex)) { + return; + } + return insert(line, index, name + ? [genColumn, sourcesIndex, sourceLine, sourceColumn, namesIndex] + : [genColumn, sourcesIndex, sourceLine, sourceColumn]); + }; +})(); +function getLine(mappings, index) { + for (let i = mappings.length; i <= index; i++) { + mappings[i] = []; + } + return mappings[index]; +} +function getColumnIndex(line, genColumn) { + let index = line.length; + for (let i = index - 1; i >= 0; index = i--) { + const current = line[i]; + if (genColumn >= current[COLUMN]) + break; + } + return index; +} +function insert(array, index, value) { + for (let i = array.length; i > index; i--) { + array[i] = array[i - 1]; + } + array[index] = value; +} +function removeEmptyFinalLines(mappings) { + const { length } = mappings; + let len = length; + for (let i = len - 1; i >= 0; len = i, i--) { + if (mappings[i].length > 0) + break; + } + if (len < length) + mappings.length = len; +} +function putAll(strarr, array) { + for (let i = 0; i < array.length; i++) + put(strarr, array[i]); +} +function skipSourceless(line, index) { + // The start of a line is already sourceless, so adding a sourceless segment to the beginning + // doesn't generate any useful information. + if (index === 0) + return true; + const prev = line[index - 1]; + // If the previous segment is also sourceless, then adding another sourceless segment doesn't + // genrate any new information. Else, this segment will end the source/named segment and point to + // a sourceless position, which is useful. + return prev.length === 1; +} +function skipSource(line, index, sourcesIndex, sourceLine, sourceColumn, namesIndex) { + // A source/named segment at the start of a line gives position at that genColumn + if (index === 0) + return false; + const prev = line[index - 1]; + // If the previous segment is sourceless, then we're transitioning to a source. + if (prev.length === 1) + return false; + // If the previous segment maps to the exact same source position, then this segment doesn't + // provide any new position information. + return (sourcesIndex === prev[SOURCES_INDEX] && + sourceLine === prev[SOURCE_LINE] && + sourceColumn === prev[SOURCE_COLUMN] && + namesIndex === (prev.length === 5 ? prev[NAMES_INDEX] : NO_NAME)); +} +function addMappingInternal(skipable, map, mapping) { + const { generated, source, original, name, content } = mapping; + if (!source) { + return addSegmentInternal(skipable, map, generated.line - 1, generated.column, null, null, null, null, null); + } + const s = source; + return addSegmentInternal(skipable, map, generated.line - 1, generated.column, s, original.line - 1, original.column, name, content); +} + +export { GenMapping, addMapping, addSegment, allMappings, fromMap, maybeAddMapping, maybeAddSegment, setSourceContent, toDecodedMap, toEncodedMap }; +//# sourceMappingURL=gen-mapping.mjs.map |