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Copyright 2022 Justin Ridgewell <justin@ridgewell.name>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# @jridgewell/trace-mapping
> Trace the original position through a source map
`trace-mapping` allows you to take the line and column of an output file and trace it to the
original location in the source file through a source map.
You may already be familiar with the [`source-map`][source-map] package's `SourceMapConsumer`. This
provides the same `originalPositionFor` and `generatedPositionFor` API, without requiring WASM.
## Installation
```sh
npm install @jridgewell/trace-mapping
```
## Usage
```typescript
import { TraceMap, originalPositionFor, generatedPositionFor } from '@jridgewell/trace-mapping';
const tracer = new TraceMap({
version: 3,
sources: ['input.js'],
names: ['foo'],
mappings: 'KAyCIA',
});
// Lines start at line 1, columns at column 0.
const traced = originalPositionFor(tracer, { line: 1, column: 5 });
assert.deepEqual(traced, {
source: 'input.js',
line: 42,
column: 4,
name: 'foo',
});
const generated = generatedPositionFor(tracer, {
source: 'input.js',
line: 42,
column: 4,
});
assert.deepEqual(generated, {
line: 1,
column: 5,
});
```
We also provide a lower level API to get the actual segment that matches our line and column. Unlike
`originalPositionFor`, `traceSegment` uses a 0-base for `line`:
```typescript
import { traceSegment } from '@jridgewell/trace-mapping';
// line is 0-base.
const traced = traceSegment(tracer, /* line */ 0, /* column */ 5);
// Segments are [outputColumn, sourcesIndex, sourceLine, sourceColumn, namesIndex]
// Again, line is 0-base and so is sourceLine
assert.deepEqual(traced, [5, 0, 41, 4, 0]);
```
### SectionedSourceMaps
The sourcemap spec defines a special `sections` field that's designed to handle concatenation of
output code with associated sourcemaps. This type of sourcemap is rarely used (no major build tool
produces it), but if you are hand coding a concatenation you may need it. We provide an `AnyMap`
helper that can receive either a regular sourcemap or a `SectionedSourceMap` and returns a
`TraceMap` instance:
```typescript
import { AnyMap } from '@jridgewell/trace-mapping';
const fooOutput = 'foo';
const barOutput = 'bar';
const output = [fooOutput, barOutput].join('\n');
const sectioned = new AnyMap({
version: 3,
sections: [
{
// 0-base line and column
offset: { line: 0, column: 0 },
// fooOutput's sourcemap
map: {
version: 3,
sources: ['foo.js'],
names: ['foo'],
mappings: 'AAAAA',
},
},
{
// barOutput's sourcemap will not affect the first line, only the second
offset: { line: 1, column: 0 },
map: {
version: 3,
sources: ['bar.js'],
names: ['bar'],
mappings: 'AAAAA',
},
},
],
});
const traced = originalPositionFor(sectioned, {
line: 2,
column: 0,
});
assert.deepEqual(traced, {
source: 'bar.js',
line: 1,
column: 0,
name: 'bar',
});
```
## Benchmarks
```
node v18.0.0
amp.js.map
trace-mapping: decoded JSON input x 183 ops/sec ±0.41% (87 runs sampled)
trace-mapping: encoded JSON input x 384 ops/sec ±0.89% (89 runs sampled)
trace-mapping: decoded Object input x 3,085 ops/sec ±0.24% (100 runs sampled)
trace-mapping: encoded Object input x 452 ops/sec ±0.80% (84 runs sampled)
source-map-js: encoded Object input x 88.82 ops/sec ±0.45% (77 runs sampled)
source-map-0.6.1: encoded Object input x 38.39 ops/sec ±1.88% (52 runs sampled)
Fastest is trace-mapping: decoded Object input
trace-mapping: decoded originalPositionFor x 4,025,347 ops/sec ±0.15% (97 runs sampled)
trace-mapping: encoded originalPositionFor x 3,333,136 ops/sec ±1.26% (90 runs sampled)
source-map-js: encoded originalPositionFor x 824,978 ops/sec ±1.06% (94 runs sampled)
source-map-0.6.1: encoded originalPositionFor x 741,300 ops/sec ±0.93% (92 runs sampled)
source-map-0.8.0: encoded originalPositionFor x 2,587,603 ops/sec ±0.75% (97 runs sampled)
Fastest is trace-mapping: decoded originalPositionFor
***
babel.min.js.map
trace-mapping: decoded JSON input x 17.43 ops/sec ±8.81% (33 runs sampled)
trace-mapping: encoded JSON input x 34.18 ops/sec ±4.67% (50 runs sampled)
trace-mapping: decoded Object input x 1,010 ops/sec ±0.41% (98 runs sampled)
trace-mapping: encoded Object input x 39.45 ops/sec ±4.01% (52 runs sampled)
source-map-js: encoded Object input x 6.57 ops/sec ±3.04% (21 runs sampled)
source-map-0.6.1: encoded Object input x 4.23 ops/sec ±2.93% (15 runs sampled)
Fastest is trace-mapping: decoded Object input
trace-mapping: decoded originalPositionFor x 7,576,265 ops/sec ±0.74% (96 runs sampled)
trace-mapping: encoded originalPositionFor x 5,019,743 ops/sec ±0.74% (94 runs sampled)
source-map-js: encoded originalPositionFor x 3,396,137 ops/sec ±42.32% (95 runs sampled)
source-map-0.6.1: encoded originalPositionFor x 3,753,176 ops/sec ±0.72% (95 runs sampled)
source-map-0.8.0: encoded originalPositionFor x 6,423,633 ops/sec ±0.74% (95 runs sampled)
Fastest is trace-mapping: decoded originalPositionFor
***
preact.js.map
trace-mapping: decoded JSON input x 3,499 ops/sec ±0.18% (98 runs sampled)
trace-mapping: encoded JSON input x 6,078 ops/sec ±0.25% (99 runs sampled)
trace-mapping: decoded Object input x 254,788 ops/sec ±0.13% (100 runs sampled)
trace-mapping: encoded Object input x 14,063 ops/sec ±0.27% (94 runs sampled)
source-map-js: encoded Object input x 2,465 ops/sec ±0.25% (98 runs sampled)
source-map-0.6.1: encoded Object input x 1,174 ops/sec ±1.90% (95 runs sampled)
Fastest is trace-mapping: decoded Object input
trace-mapping: decoded originalPositionFor x 7,720,171 ops/sec ±0.14% (97 runs sampled)
trace-mapping: encoded originalPositionFor x 6,864,485 ops/sec ±0.16% (101 runs sampled)
source-map-js: encoded originalPositionFor x 2,387,219 ops/sec ±0.28% (98 runs sampled)
source-map-0.6.1: encoded originalPositionFor x 1,565,339 ops/sec ±0.32% (101 runs sampled)
source-map-0.8.0: encoded originalPositionFor x 3,819,732 ops/sec ±0.38% (98 runs sampled)
Fastest is trace-mapping: decoded originalPositionFor
***
react.js.map
trace-mapping: decoded JSON input x 1,719 ops/sec ±0.19% (99 runs sampled)
trace-mapping: encoded JSON input x 4,284 ops/sec ±0.51% (99 runs sampled)
trace-mapping: decoded Object input x 94,668 ops/sec ±0.08% (99 runs sampled)
trace-mapping: encoded Object input x 5,287 ops/sec ±0.24% (99 runs sampled)
source-map-js: encoded Object input x 814 ops/sec ±0.20% (98 runs sampled)
source-map-0.6.1: encoded Object input x 429 ops/sec ±0.24% (94 runs sampled)
Fastest is trace-mapping: decoded Object input
trace-mapping: decoded originalPositionFor x 28,927,989 ops/sec ±0.61% (94 runs sampled)
trace-mapping: encoded originalPositionFor x 27,394,475 ops/sec ±0.55% (97 runs sampled)
source-map-js: encoded originalPositionFor x 16,856,730 ops/sec ±0.45% (96 runs sampled)
source-map-0.6.1: encoded originalPositionFor x 12,258,950 ops/sec ±0.41% (97 runs sampled)
source-map-0.8.0: encoded originalPositionFor x 22,272,990 ops/sec ±0.58% (95 runs sampled)
Fastest is trace-mapping: decoded originalPositionFor
```
[source-map]: https://www.npmjs.com/package/source-map

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import { encode, decode } from '@jridgewell/sourcemap-codec';
import resolveUri from '@jridgewell/resolve-uri';
function resolve(input, base) {
// The base is always treated as a directory, if it's not empty.
// https://github.com/mozilla/source-map/blob/8cb3ee57/lib/util.js#L327
// https://github.com/chromium/chromium/blob/da4adbb3/third_party/blink/renderer/devtools/front_end/sdk/SourceMap.js#L400-L401
if (base && !base.endsWith('/'))
base += '/';
return resolveUri(input, base);
}
/**
* Removes everything after the last "/", but leaves the slash.
*/
function stripFilename(path) {
if (!path)
return '';
const index = path.lastIndexOf('/');
return path.slice(0, index + 1);
}
const COLUMN = 0;
const SOURCES_INDEX = 1;
const SOURCE_LINE = 2;
const SOURCE_COLUMN = 3;
const NAMES_INDEX = 4;
const REV_GENERATED_LINE = 1;
const REV_GENERATED_COLUMN = 2;
function maybeSort(mappings, owned) {
const unsortedIndex = nextUnsortedSegmentLine(mappings, 0);
if (unsortedIndex === mappings.length)
return mappings;
// If we own the array (meaning we parsed it from JSON), then we're free to directly mutate it. If
// not, we do not want to modify the consumer's input array.
if (!owned)
mappings = mappings.slice();
for (let i = unsortedIndex; i < mappings.length; i = nextUnsortedSegmentLine(mappings, i + 1)) {
mappings[i] = sortSegments(mappings[i], owned);
}
return mappings;
}
function nextUnsortedSegmentLine(mappings, start) {
for (let i = start; i < mappings.length; i++) {
if (!isSorted(mappings[i]))
return i;
}
return mappings.length;
}
function isSorted(line) {
for (let j = 1; j < line.length; j++) {
if (line[j][COLUMN] < line[j - 1][COLUMN]) {
return false;
}
}
return true;
}
function sortSegments(line, owned) {
if (!owned)
line = line.slice();
return line.sort(sortComparator);
}
function sortComparator(a, b) {
return a[COLUMN] - b[COLUMN];
}
let found = false;
/**
* A binary search implementation that returns the index if a match is found.
* If no match is found, then the left-index (the index associated with the item that comes just
* before the desired index) is returned. To maintain proper sort order, a splice would happen at
* the next index:
*
* ```js
* const array = [1, 3];
* const needle = 2;
* const index = binarySearch(array, needle, (item, needle) => item - needle);
*
* assert.equal(index, 0);
* array.splice(index + 1, 0, needle);
* assert.deepEqual(array, [1, 2, 3]);
* ```
*/
function binarySearch(haystack, needle, low, high) {
while (low <= high) {
const mid = low + ((high - low) >> 1);
const cmp = haystack[mid][COLUMN] - needle;
if (cmp === 0) {
found = true;
return mid;
}
if (cmp < 0) {
low = mid + 1;
}
else {
high = mid - 1;
}
}
found = false;
return low - 1;
}
function upperBound(haystack, needle, index) {
for (let i = index + 1; i < haystack.length; i++, index++) {
if (haystack[i][COLUMN] !== needle)
break;
}
return index;
}
function lowerBound(haystack, needle, index) {
for (let i = index - 1; i >= 0; i--, index--) {
if (haystack[i][COLUMN] !== needle)
break;
}
return index;
}
function memoizedState() {
return {
lastKey: -1,
lastNeedle: -1,
lastIndex: -1,
};
}
/**
* This overly complicated beast is just to record the last tested line/column and the resulting
* index, allowing us to skip a few tests if mappings are monotonically increasing.
*/
function memoizedBinarySearch(haystack, needle, state, key) {
const { lastKey, lastNeedle, lastIndex } = state;
let low = 0;
let high = haystack.length - 1;
if (key === lastKey) {
if (needle === lastNeedle) {
found = lastIndex !== -1 && haystack[lastIndex][COLUMN] === needle;
return lastIndex;
}
if (needle >= lastNeedle) {
// lastIndex may be -1 if the previous needle was not found.
low = lastIndex === -1 ? 0 : lastIndex;
}
else {
high = lastIndex;
}
}
state.lastKey = key;
state.lastNeedle = needle;
return (state.lastIndex = binarySearch(haystack, needle, low, high));
}
// Rebuilds the original source files, with mappings that are ordered by source line/column instead
// of generated line/column.
function buildBySources(decoded, memos) {
const sources = memos.map(buildNullArray);
for (let i = 0; i < decoded.length; i++) {
const line = decoded[i];
for (let j = 0; j < line.length; j++) {
const seg = line[j];
if (seg.length === 1)
continue;
const sourceIndex = seg[SOURCES_INDEX];
const sourceLine = seg[SOURCE_LINE];
const sourceColumn = seg[SOURCE_COLUMN];
const originalSource = sources[sourceIndex];
const originalLine = (originalSource[sourceLine] || (originalSource[sourceLine] = []));
const memo = memos[sourceIndex];
// The binary search either found a match, or it found the left-index just before where the
// segment should go. Either way, we want to insert after that. And there may be multiple
// generated segments associated with an original location, so there may need to move several
// indexes before we find where we need to insert.
const index = upperBound(originalLine, sourceColumn, memoizedBinarySearch(originalLine, sourceColumn, memo, sourceLine));
insert(originalLine, (memo.lastIndex = index + 1), [sourceColumn, i, seg[COLUMN]]);
}
}
return sources;
}
function insert(array, index, value) {
for (let i = array.length; i > index; i--) {
array[i] = array[i - 1];
}
array[index] = value;
}
// Null arrays allow us to use ordered index keys without actually allocating contiguous memory like
// a real array. We use a null-prototype object to avoid prototype pollution and deoptimizations.
// Numeric properties on objects are magically sorted in ascending order by the engine regardless of
// the insertion order. So, by setting any numeric keys, even out of order, we'll get ascending
// order when iterating with for-in.
function buildNullArray() {
return { __proto__: null };
}
const AnyMap = function (map, mapUrl) {
const parsed = typeof map === 'string' ? JSON.parse(map) : map;
if (!('sections' in parsed))
return new TraceMap(parsed, mapUrl);
const mappings = [];
const sources = [];
const sourcesContent = [];
const names = [];
const { sections } = parsed;
let i = 0;
for (; i < sections.length - 1; i++) {
const no = sections[i + 1].offset;
addSection(sections[i], mapUrl, mappings, sources, sourcesContent, names, no.line, no.column);
}
if (sections.length > 0) {
addSection(sections[i], mapUrl, mappings, sources, sourcesContent, names, Infinity, Infinity);
}
const joined = {
version: 3,
file: parsed.file,
names,
sources,
sourcesContent,
mappings,
};
return presortedDecodedMap(joined);
};
function addSection(section, mapUrl, mappings, sources, sourcesContent, names, stopLine, stopColumn) {
const map = AnyMap(section.map, mapUrl);
const { line: lineOffset, column: columnOffset } = section.offset;
const sourcesOffset = sources.length;
const namesOffset = names.length;
const decoded = decodedMappings(map);
const { resolvedSources } = map;
append(sources, resolvedSources);
append(sourcesContent, map.sourcesContent || fillSourcesContent(resolvedSources.length));
append(names, map.names);
// If this section jumps forwards several lines, we need to add lines to the output mappings catch up.
for (let i = mappings.length; i <= lineOffset; i++)
mappings.push([]);
// We can only add so many lines before we step into the range that the next section's map
// controls. When we get to the last line, then we'll start checking the segments to see if
// they've crossed into the column range.
const stopI = stopLine - lineOffset;
const len = Math.min(decoded.length, stopI + 1);
for (let i = 0; i < len; i++) {
const line = decoded[i];
// On the 0th loop, the line will already exist due to a previous section, or the line catch up
// loop above.
const out = i === 0 ? mappings[lineOffset] : (mappings[lineOffset + i] = []);
// On the 0th loop, the section's column offset shifts us forward. On all other lines (since the
// map can be multiple lines), it doesn't.
const cOffset = i === 0 ? columnOffset : 0;
for (let j = 0; j < line.length; j++) {
const seg = line[j];
const column = cOffset + seg[COLUMN];
// If this segment steps into the column range that the next section's map controls, we need
// to stop early.
if (i === stopI && column >= stopColumn)
break;
if (seg.length === 1) {
out.push([column]);
continue;
}
const sourcesIndex = sourcesOffset + seg[SOURCES_INDEX];
const sourceLine = seg[SOURCE_LINE];
const sourceColumn = seg[SOURCE_COLUMN];
if (seg.length === 4) {
out.push([column, sourcesIndex, sourceLine, sourceColumn]);
continue;
}
out.push([column, sourcesIndex, sourceLine, sourceColumn, namesOffset + seg[NAMES_INDEX]]);
}
}
}
function append(arr, other) {
for (let i = 0; i < other.length; i++)
arr.push(other[i]);
}
// Sourcemaps don't need to have sourcesContent, and if they don't, we need to create an array of
// equal length to the sources. This is because the sources and sourcesContent are paired arrays,
// where `sourcesContent[i]` is the content of the `sources[i]` file. If we didn't, then joined
// sourcemap would desynchronize the sources/contents.
function fillSourcesContent(len) {
const sourcesContent = [];
for (let i = 0; i < len; i++)
sourcesContent[i] = null;
return sourcesContent;
}
const INVALID_ORIGINAL_MAPPING = Object.freeze({
source: null,
line: null,
column: null,
name: null,
});
const INVALID_GENERATED_MAPPING = Object.freeze({
line: null,
column: null,
});
const LINE_GTR_ZERO = '`line` must be greater than 0 (lines start at line 1)';
const COL_GTR_EQ_ZERO = '`column` must be greater than or equal to 0 (columns start at column 0)';
const LEAST_UPPER_BOUND = -1;
const GREATEST_LOWER_BOUND = 1;
/**
* Returns the encoded (VLQ string) form of the SourceMap's mappings field.
*/
let encodedMappings;
/**
* Returns the decoded (array of lines of segments) form of the SourceMap's mappings field.
*/
let decodedMappings;
/**
* A low-level API to find the segment associated with a generated line/column (think, from a
* stack trace). Line and column here are 0-based, unlike `originalPositionFor`.
*/
let traceSegment;
/**
* A higher-level API to find the source/line/column associated with a generated line/column
* (think, from a stack trace). Line is 1-based, but column is 0-based, due to legacy behavior in
* `source-map` library.
*/
let originalPositionFor;
/**
* Finds the source/line/column directly after the mapping returned by originalPositionFor, provided
* the found mapping is from the same source and line as the originalPositionFor mapping.
*
* Eg, in the code `let id = 1`, `originalPositionAfter` could find the mapping associated with `1`
* using the same needle that would return `id` when calling `originalPositionFor`.
*/
let generatedPositionFor;
/**
* Iterates each mapping in generated position order.
*/
let eachMapping;
/**
* A helper that skips sorting of the input map's mappings array, which can be expensive for larger
* maps.
*/
let presortedDecodedMap;
/**
* Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects
* a sourcemap, or to JSON.stringify.
*/
let decodedMap;
/**
* Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects
* a sourcemap, or to JSON.stringify.
*/
let encodedMap;
class TraceMap {
constructor(map, mapUrl) {
this._decodedMemo = memoizedState();
this._bySources = undefined;
this._bySourceMemos = undefined;
const isString = typeof map === 'string';
if (!isString && map.constructor === TraceMap)
return map;
const parsed = (isString ? JSON.parse(map) : map);
const { version, file, names, sourceRoot, sources, sourcesContent } = parsed;
this.version = version;
this.file = file;
this.names = names;
this.sourceRoot = sourceRoot;
this.sources = sources;
this.sourcesContent = sourcesContent;
if (sourceRoot || mapUrl) {
const from = resolve(sourceRoot || '', stripFilename(mapUrl));
this.resolvedSources = sources.map((s) => resolve(s || '', from));
}
else {
this.resolvedSources = sources.map((s) => s || '');
}
const { mappings } = parsed;
if (typeof mappings === 'string') {
this._encoded = mappings;
this._decoded = undefined;
}
else {
this._encoded = undefined;
this._decoded = maybeSort(mappings, isString);
}
}
}
(() => {
encodedMappings = (map) => {
var _a;
return ((_a = map._encoded) !== null && _a !== void 0 ? _a : (map._encoded = encode(map._decoded)));
};
decodedMappings = (map) => {
return (map._decoded || (map._decoded = decode(map._encoded)));
};
traceSegment = (map, line, column) => {
const decoded = decodedMappings(map);
// It's common for parent source maps to have pointers to lines that have no
// mapping (like a "//# sourceMappingURL=") at the end of the child file.
if (line >= decoded.length)
return null;
return traceSegmentInternal(decoded[line], map._decodedMemo, line, column, GREATEST_LOWER_BOUND);
};
originalPositionFor = (map, { line, column, bias }) => {
line--;
if (line < 0)
throw new Error(LINE_GTR_ZERO);
if (column < 0)
throw new Error(COL_GTR_EQ_ZERO);
const decoded = decodedMappings(map);
// It's common for parent source maps to have pointers to lines that have no
// mapping (like a "//# sourceMappingURL=") at the end of the child file.
if (line >= decoded.length)
return INVALID_ORIGINAL_MAPPING;
const segment = traceSegmentInternal(decoded[line], map._decodedMemo, line, column, bias || GREATEST_LOWER_BOUND);
if (segment == null)
return INVALID_ORIGINAL_MAPPING;
if (segment.length == 1)
return INVALID_ORIGINAL_MAPPING;
const { names, resolvedSources } = map;
return {
source: resolvedSources[segment[SOURCES_INDEX]],
line: segment[SOURCE_LINE] + 1,
column: segment[SOURCE_COLUMN],
name: segment.length === 5 ? names[segment[NAMES_INDEX]] : null,
};
};
generatedPositionFor = (map, { source, line, column, bias }) => {
line--;
if (line < 0)
throw new Error(LINE_GTR_ZERO);
if (column < 0)
throw new Error(COL_GTR_EQ_ZERO);
const { sources, resolvedSources } = map;
let sourceIndex = sources.indexOf(source);
if (sourceIndex === -1)
sourceIndex = resolvedSources.indexOf(source);
if (sourceIndex === -1)
return INVALID_GENERATED_MAPPING;
const generated = (map._bySources || (map._bySources = buildBySources(decodedMappings(map), (map._bySourceMemos = sources.map(memoizedState)))));
const memos = map._bySourceMemos;
const segments = generated[sourceIndex][line];
if (segments == null)
return INVALID_GENERATED_MAPPING;
const segment = traceSegmentInternal(segments, memos[sourceIndex], line, column, bias || GREATEST_LOWER_BOUND);
if (segment == null)
return INVALID_GENERATED_MAPPING;
return {
line: segment[REV_GENERATED_LINE] + 1,
column: segment[REV_GENERATED_COLUMN],
};
};
eachMapping = (map, cb) => {
const decoded = decodedMappings(map);
const { names, resolvedSources } = map;
for (let i = 0; i < decoded.length; i++) {
const line = decoded[i];
for (let j = 0; j < line.length; j++) {
const seg = line[j];
const generatedLine = i + 1;
const generatedColumn = seg[0];
let source = null;
let originalLine = null;
let originalColumn = null;
let name = null;
if (seg.length !== 1) {
source = resolvedSources[seg[1]];
originalLine = seg[2] + 1;
originalColumn = seg[3];
}
if (seg.length === 5)
name = names[seg[4]];
cb({
generatedLine,
generatedColumn,
source,
originalLine,
originalColumn,
name,
});
}
}
};
presortedDecodedMap = (map, mapUrl) => {
const clone = Object.assign({}, map);
clone.mappings = [];
const tracer = new TraceMap(clone, mapUrl);
tracer._decoded = map.mappings;
return tracer;
};
decodedMap = (map) => {
return {
version: 3,
file: map.file,
names: map.names,
sourceRoot: map.sourceRoot,
sources: map.sources,
sourcesContent: map.sourcesContent,
mappings: decodedMappings(map),
};
};
encodedMap = (map) => {
return {
version: 3,
file: map.file,
names: map.names,
sourceRoot: map.sourceRoot,
sources: map.sources,
sourcesContent: map.sourcesContent,
mappings: encodedMappings(map),
};
};
})();
function traceSegmentInternal(segments, memo, line, column, bias) {
let index = memoizedBinarySearch(segments, column, memo, line);
if (found) {
index = (bias === LEAST_UPPER_BOUND ? upperBound : lowerBound)(segments, column, index);
}
else if (bias === LEAST_UPPER_BOUND)
index++;
if (index === -1 || index === segments.length)
return null;
return segments[index];
}
export { AnyMap, GREATEST_LOWER_BOUND, LEAST_UPPER_BOUND, TraceMap, decodedMap, decodedMappings, eachMapping, encodedMap, encodedMappings, generatedPositionFor, originalPositionFor, presortedDecodedMap, traceSegment };
//# sourceMappingURL=trace-mapping.mjs.map

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(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@jridgewell/sourcemap-codec'), require('@jridgewell/resolve-uri')) :
typeof define === 'function' && define.amd ? define(['exports', '@jridgewell/sourcemap-codec', '@jridgewell/resolve-uri'], factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.traceMapping = {}, global.sourcemapCodec, global.resolveURI));
})(this, (function (exports, sourcemapCodec, resolveUri) { 'use strict';
function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
var resolveUri__default = /*#__PURE__*/_interopDefaultLegacy(resolveUri);
function resolve(input, base) {
// The base is always treated as a directory, if it's not empty.
// https://github.com/mozilla/source-map/blob/8cb3ee57/lib/util.js#L327
// https://github.com/chromium/chromium/blob/da4adbb3/third_party/blink/renderer/devtools/front_end/sdk/SourceMap.js#L400-L401
if (base && !base.endsWith('/'))
base += '/';
return resolveUri__default["default"](input, base);
}
/**
* Removes everything after the last "/", but leaves the slash.
*/
function stripFilename(path) {
if (!path)
return '';
const index = path.lastIndexOf('/');
return path.slice(0, index + 1);
}
const COLUMN = 0;
const SOURCES_INDEX = 1;
const SOURCE_LINE = 2;
const SOURCE_COLUMN = 3;
const NAMES_INDEX = 4;
const REV_GENERATED_LINE = 1;
const REV_GENERATED_COLUMN = 2;
function maybeSort(mappings, owned) {
const unsortedIndex = nextUnsortedSegmentLine(mappings, 0);
if (unsortedIndex === mappings.length)
return mappings;
// If we own the array (meaning we parsed it from JSON), then we're free to directly mutate it. If
// not, we do not want to modify the consumer's input array.
if (!owned)
mappings = mappings.slice();
for (let i = unsortedIndex; i < mappings.length; i = nextUnsortedSegmentLine(mappings, i + 1)) {
mappings[i] = sortSegments(mappings[i], owned);
}
return mappings;
}
function nextUnsortedSegmentLine(mappings, start) {
for (let i = start; i < mappings.length; i++) {
if (!isSorted(mappings[i]))
return i;
}
return mappings.length;
}
function isSorted(line) {
for (let j = 1; j < line.length; j++) {
if (line[j][COLUMN] < line[j - 1][COLUMN]) {
return false;
}
}
return true;
}
function sortSegments(line, owned) {
if (!owned)
line = line.slice();
return line.sort(sortComparator);
}
function sortComparator(a, b) {
return a[COLUMN] - b[COLUMN];
}
let found = false;
/**
* A binary search implementation that returns the index if a match is found.
* If no match is found, then the left-index (the index associated with the item that comes just
* before the desired index) is returned. To maintain proper sort order, a splice would happen at
* the next index:
*
* ```js
* const array = [1, 3];
* const needle = 2;
* const index = binarySearch(array, needle, (item, needle) => item - needle);
*
* assert.equal(index, 0);
* array.splice(index + 1, 0, needle);
* assert.deepEqual(array, [1, 2, 3]);
* ```
*/
function binarySearch(haystack, needle, low, high) {
while (low <= high) {
const mid = low + ((high - low) >> 1);
const cmp = haystack[mid][COLUMN] - needle;
if (cmp === 0) {
found = true;
return mid;
}
if (cmp < 0) {
low = mid + 1;
}
else {
high = mid - 1;
}
}
found = false;
return low - 1;
}
function upperBound(haystack, needle, index) {
for (let i = index + 1; i < haystack.length; i++, index++) {
if (haystack[i][COLUMN] !== needle)
break;
}
return index;
}
function lowerBound(haystack, needle, index) {
for (let i = index - 1; i >= 0; i--, index--) {
if (haystack[i][COLUMN] !== needle)
break;
}
return index;
}
function memoizedState() {
return {
lastKey: -1,
lastNeedle: -1,
lastIndex: -1,
};
}
/**
* This overly complicated beast is just to record the last tested line/column and the resulting
* index, allowing us to skip a few tests if mappings are monotonically increasing.
*/
function memoizedBinarySearch(haystack, needle, state, key) {
const { lastKey, lastNeedle, lastIndex } = state;
let low = 0;
let high = haystack.length - 1;
if (key === lastKey) {
if (needle === lastNeedle) {
found = lastIndex !== -1 && haystack[lastIndex][COLUMN] === needle;
return lastIndex;
}
if (needle >= lastNeedle) {
// lastIndex may be -1 if the previous needle was not found.
low = lastIndex === -1 ? 0 : lastIndex;
}
else {
high = lastIndex;
}
}
state.lastKey = key;
state.lastNeedle = needle;
return (state.lastIndex = binarySearch(haystack, needle, low, high));
}
// Rebuilds the original source files, with mappings that are ordered by source line/column instead
// of generated line/column.
function buildBySources(decoded, memos) {
const sources = memos.map(buildNullArray);
for (let i = 0; i < decoded.length; i++) {
const line = decoded[i];
for (let j = 0; j < line.length; j++) {
const seg = line[j];
if (seg.length === 1)
continue;
const sourceIndex = seg[SOURCES_INDEX];
const sourceLine = seg[SOURCE_LINE];
const sourceColumn = seg[SOURCE_COLUMN];
const originalSource = sources[sourceIndex];
const originalLine = (originalSource[sourceLine] || (originalSource[sourceLine] = []));
const memo = memos[sourceIndex];
// The binary search either found a match, or it found the left-index just before where the
// segment should go. Either way, we want to insert after that. And there may be multiple
// generated segments associated with an original location, so there may need to move several
// indexes before we find where we need to insert.
const index = upperBound(originalLine, sourceColumn, memoizedBinarySearch(originalLine, sourceColumn, memo, sourceLine));
insert(originalLine, (memo.lastIndex = index + 1), [sourceColumn, i, seg[COLUMN]]);
}
}
return sources;
}
function insert(array, index, value) {
for (let i = array.length; i > index; i--) {
array[i] = array[i - 1];
}
array[index] = value;
}
// Null arrays allow us to use ordered index keys without actually allocating contiguous memory like
// a real array. We use a null-prototype object to avoid prototype pollution and deoptimizations.
// Numeric properties on objects are magically sorted in ascending order by the engine regardless of
// the insertion order. So, by setting any numeric keys, even out of order, we'll get ascending
// order when iterating with for-in.
function buildNullArray() {
return { __proto__: null };
}
const AnyMap = function (map, mapUrl) {
const parsed = typeof map === 'string' ? JSON.parse(map) : map;
if (!('sections' in parsed))
return new TraceMap(parsed, mapUrl);
const mappings = [];
const sources = [];
const sourcesContent = [];
const names = [];
const { sections } = parsed;
let i = 0;
for (; i < sections.length - 1; i++) {
const no = sections[i + 1].offset;
addSection(sections[i], mapUrl, mappings, sources, sourcesContent, names, no.line, no.column);
}
if (sections.length > 0) {
addSection(sections[i], mapUrl, mappings, sources, sourcesContent, names, Infinity, Infinity);
}
const joined = {
version: 3,
file: parsed.file,
names,
sources,
sourcesContent,
mappings,
};
return exports.presortedDecodedMap(joined);
};
function addSection(section, mapUrl, mappings, sources, sourcesContent, names, stopLine, stopColumn) {
const map = AnyMap(section.map, mapUrl);
const { line: lineOffset, column: columnOffset } = section.offset;
const sourcesOffset = sources.length;
const namesOffset = names.length;
const decoded = exports.decodedMappings(map);
const { resolvedSources } = map;
append(sources, resolvedSources);
append(sourcesContent, map.sourcesContent || fillSourcesContent(resolvedSources.length));
append(names, map.names);
// If this section jumps forwards several lines, we need to add lines to the output mappings catch up.
for (let i = mappings.length; i <= lineOffset; i++)
mappings.push([]);
// We can only add so many lines before we step into the range that the next section's map
// controls. When we get to the last line, then we'll start checking the segments to see if
// they've crossed into the column range.
const stopI = stopLine - lineOffset;
const len = Math.min(decoded.length, stopI + 1);
for (let i = 0; i < len; i++) {
const line = decoded[i];
// On the 0th loop, the line will already exist due to a previous section, or the line catch up
// loop above.
const out = i === 0 ? mappings[lineOffset] : (mappings[lineOffset + i] = []);
// On the 0th loop, the section's column offset shifts us forward. On all other lines (since the
// map can be multiple lines), it doesn't.
const cOffset = i === 0 ? columnOffset : 0;
for (let j = 0; j < line.length; j++) {
const seg = line[j];
const column = cOffset + seg[COLUMN];
// If this segment steps into the column range that the next section's map controls, we need
// to stop early.
if (i === stopI && column >= stopColumn)
break;
if (seg.length === 1) {
out.push([column]);
continue;
}
const sourcesIndex = sourcesOffset + seg[SOURCES_INDEX];
const sourceLine = seg[SOURCE_LINE];
const sourceColumn = seg[SOURCE_COLUMN];
if (seg.length === 4) {
out.push([column, sourcesIndex, sourceLine, sourceColumn]);
continue;
}
out.push([column, sourcesIndex, sourceLine, sourceColumn, namesOffset + seg[NAMES_INDEX]]);
}
}
}
function append(arr, other) {
for (let i = 0; i < other.length; i++)
arr.push(other[i]);
}
// Sourcemaps don't need to have sourcesContent, and if they don't, we need to create an array of
// equal length to the sources. This is because the sources and sourcesContent are paired arrays,
// where `sourcesContent[i]` is the content of the `sources[i]` file. If we didn't, then joined
// sourcemap would desynchronize the sources/contents.
function fillSourcesContent(len) {
const sourcesContent = [];
for (let i = 0; i < len; i++)
sourcesContent[i] = null;
return sourcesContent;
}
const INVALID_ORIGINAL_MAPPING = Object.freeze({
source: null,
line: null,
column: null,
name: null,
});
const INVALID_GENERATED_MAPPING = Object.freeze({
line: null,
column: null,
});
const LINE_GTR_ZERO = '`line` must be greater than 0 (lines start at line 1)';
const COL_GTR_EQ_ZERO = '`column` must be greater than or equal to 0 (columns start at column 0)';
const LEAST_UPPER_BOUND = -1;
const GREATEST_LOWER_BOUND = 1;
/**
* Returns the encoded (VLQ string) form of the SourceMap's mappings field.
*/
exports.encodedMappings = void 0;
/**
* Returns the decoded (array of lines of segments) form of the SourceMap's mappings field.
*/
exports.decodedMappings = void 0;
/**
* A low-level API to find the segment associated with a generated line/column (think, from a
* stack trace). Line and column here are 0-based, unlike `originalPositionFor`.
*/
exports.traceSegment = void 0;
/**
* A higher-level API to find the source/line/column associated with a generated line/column
* (think, from a stack trace). Line is 1-based, but column is 0-based, due to legacy behavior in
* `source-map` library.
*/
exports.originalPositionFor = void 0;
/**
* Finds the source/line/column directly after the mapping returned by originalPositionFor, provided
* the found mapping is from the same source and line as the originalPositionFor mapping.
*
* Eg, in the code `let id = 1`, `originalPositionAfter` could find the mapping associated with `1`
* using the same needle that would return `id` when calling `originalPositionFor`.
*/
exports.generatedPositionFor = void 0;
/**
* Iterates each mapping in generated position order.
*/
exports.eachMapping = void 0;
/**
* A helper that skips sorting of the input map's mappings array, which can be expensive for larger
* maps.
*/
exports.presortedDecodedMap = void 0;
/**
* Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects
* a sourcemap, or to JSON.stringify.
*/
exports.decodedMap = void 0;
/**
* Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects
* a sourcemap, or to JSON.stringify.
*/
exports.encodedMap = void 0;
class TraceMap {
constructor(map, mapUrl) {
this._decodedMemo = memoizedState();
this._bySources = undefined;
this._bySourceMemos = undefined;
const isString = typeof map === 'string';
if (!isString && map.constructor === TraceMap)
return map;
const parsed = (isString ? JSON.parse(map) : map);
const { version, file, names, sourceRoot, sources, sourcesContent } = parsed;
this.version = version;
this.file = file;
this.names = names;
this.sourceRoot = sourceRoot;
this.sources = sources;
this.sourcesContent = sourcesContent;
if (sourceRoot || mapUrl) {
const from = resolve(sourceRoot || '', stripFilename(mapUrl));
this.resolvedSources = sources.map((s) => resolve(s || '', from));
}
else {
this.resolvedSources = sources.map((s) => s || '');
}
const { mappings } = parsed;
if (typeof mappings === 'string') {
this._encoded = mappings;
this._decoded = undefined;
}
else {
this._encoded = undefined;
this._decoded = maybeSort(mappings, isString);
}
}
}
(() => {
exports.encodedMappings = (map) => {
var _a;
return ((_a = map._encoded) !== null && _a !== void 0 ? _a : (map._encoded = sourcemapCodec.encode(map._decoded)));
};
exports.decodedMappings = (map) => {
return (map._decoded || (map._decoded = sourcemapCodec.decode(map._encoded)));
};
exports.traceSegment = (map, line, column) => {
const decoded = exports.decodedMappings(map);
// It's common for parent source maps to have pointers to lines that have no
// mapping (like a "//# sourceMappingURL=") at the end of the child file.
if (line >= decoded.length)
return null;
return traceSegmentInternal(decoded[line], map._decodedMemo, line, column, GREATEST_LOWER_BOUND);
};
exports.originalPositionFor = (map, { line, column, bias }) => {
line--;
if (line < 0)
throw new Error(LINE_GTR_ZERO);
if (column < 0)
throw new Error(COL_GTR_EQ_ZERO);
const decoded = exports.decodedMappings(map);
// It's common for parent source maps to have pointers to lines that have no
// mapping (like a "//# sourceMappingURL=") at the end of the child file.
if (line >= decoded.length)
return INVALID_ORIGINAL_MAPPING;
const segment = traceSegmentInternal(decoded[line], map._decodedMemo, line, column, bias || GREATEST_LOWER_BOUND);
if (segment == null)
return INVALID_ORIGINAL_MAPPING;
if (segment.length == 1)
return INVALID_ORIGINAL_MAPPING;
const { names, resolvedSources } = map;
return {
source: resolvedSources[segment[SOURCES_INDEX]],
line: segment[SOURCE_LINE] + 1,
column: segment[SOURCE_COLUMN],
name: segment.length === 5 ? names[segment[NAMES_INDEX]] : null,
};
};
exports.generatedPositionFor = (map, { source, line, column, bias }) => {
line--;
if (line < 0)
throw new Error(LINE_GTR_ZERO);
if (column < 0)
throw new Error(COL_GTR_EQ_ZERO);
const { sources, resolvedSources } = map;
let sourceIndex = sources.indexOf(source);
if (sourceIndex === -1)
sourceIndex = resolvedSources.indexOf(source);
if (sourceIndex === -1)
return INVALID_GENERATED_MAPPING;
const generated = (map._bySources || (map._bySources = buildBySources(exports.decodedMappings(map), (map._bySourceMemos = sources.map(memoizedState)))));
const memos = map._bySourceMemos;
const segments = generated[sourceIndex][line];
if (segments == null)
return INVALID_GENERATED_MAPPING;
const segment = traceSegmentInternal(segments, memos[sourceIndex], line, column, bias || GREATEST_LOWER_BOUND);
if (segment == null)
return INVALID_GENERATED_MAPPING;
return {
line: segment[REV_GENERATED_LINE] + 1,
column: segment[REV_GENERATED_COLUMN],
};
};
exports.eachMapping = (map, cb) => {
const decoded = exports.decodedMappings(map);
const { names, resolvedSources } = map;
for (let i = 0; i < decoded.length; i++) {
const line = decoded[i];
for (let j = 0; j < line.length; j++) {
const seg = line[j];
const generatedLine = i + 1;
const generatedColumn = seg[0];
let source = null;
let originalLine = null;
let originalColumn = null;
let name = null;
if (seg.length !== 1) {
source = resolvedSources[seg[1]];
originalLine = seg[2] + 1;
originalColumn = seg[3];
}
if (seg.length === 5)
name = names[seg[4]];
cb({
generatedLine,
generatedColumn,
source,
originalLine,
originalColumn,
name,
});
}
}
};
exports.presortedDecodedMap = (map, mapUrl) => {
const clone = Object.assign({}, map);
clone.mappings = [];
const tracer = new TraceMap(clone, mapUrl);
tracer._decoded = map.mappings;
return tracer;
};
exports.decodedMap = (map) => {
return {
version: 3,
file: map.file,
names: map.names,
sourceRoot: map.sourceRoot,
sources: map.sources,
sourcesContent: map.sourcesContent,
mappings: exports.decodedMappings(map),
};
};
exports.encodedMap = (map) => {
return {
version: 3,
file: map.file,
names: map.names,
sourceRoot: map.sourceRoot,
sources: map.sources,
sourcesContent: map.sourcesContent,
mappings: exports.encodedMappings(map),
};
};
})();
function traceSegmentInternal(segments, memo, line, column, bias) {
let index = memoizedBinarySearch(segments, column, memo, line);
if (found) {
index = (bias === LEAST_UPPER_BOUND ? upperBound : lowerBound)(segments, column, index);
}
else if (bias === LEAST_UPPER_BOUND)
index++;
if (index === -1 || index === segments.length)
return null;
return segments[index];
}
exports.AnyMap = AnyMap;
exports.GREATEST_LOWER_BOUND = GREATEST_LOWER_BOUND;
exports.LEAST_UPPER_BOUND = LEAST_UPPER_BOUND;
exports.TraceMap = TraceMap;
Object.defineProperty(exports, '__esModule', { value: true });
}));
//# sourceMappingURL=trace-mapping.umd.js.map

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import { TraceMap } from './trace-mapping';
import type { SectionedSourceMapInput } from './types';
declare type AnyMap = {
new (map: SectionedSourceMapInput, mapUrl?: string | null): TraceMap;
(map: SectionedSourceMapInput, mapUrl?: string | null): TraceMap;
};
export declare const AnyMap: AnyMap;
export {};

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import type { SourceMapSegment, ReverseSegment } from './sourcemap-segment';
export declare type MemoState = {
lastKey: number;
lastNeedle: number;
lastIndex: number;
};
export declare let found: boolean;
/**
* A binary search implementation that returns the index if a match is found.
* If no match is found, then the left-index (the index associated with the item that comes just
* before the desired index) is returned. To maintain proper sort order, a splice would happen at
* the next index:
*
* ```js
* const array = [1, 3];
* const needle = 2;
* const index = binarySearch(array, needle, (item, needle) => item - needle);
*
* assert.equal(index, 0);
* array.splice(index + 1, 0, needle);
* assert.deepEqual(array, [1, 2, 3]);
* ```
*/
export declare function binarySearch(haystack: SourceMapSegment[] | ReverseSegment[], needle: number, low: number, high: number): number;
export declare function upperBound(haystack: SourceMapSegment[] | ReverseSegment[], needle: number, index: number): number;
export declare function lowerBound(haystack: SourceMapSegment[] | ReverseSegment[], needle: number, index: number): number;
export declare function memoizedState(): MemoState;
/**
* This overly complicated beast is just to record the last tested line/column and the resulting
* index, allowing us to skip a few tests if mappings are monotonically increasing.
*/
export declare function memoizedBinarySearch(haystack: SourceMapSegment[] | ReverseSegment[], needle: number, state: MemoState, key: number): number;

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import type { ReverseSegment, SourceMapSegment } from './sourcemap-segment';
import type { MemoState } from './binary-search';
export declare type Source = {
__proto__: null;
[line: number]: Exclude<ReverseSegment, [number]>[];
};
export default function buildBySources(decoded: readonly SourceMapSegment[][], memos: MemoState[]): Source[];

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export default function resolve(input: string, base: string | undefined): string;

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import type { SourceMapSegment } from './sourcemap-segment';
export default function maybeSort(mappings: SourceMapSegment[][], owned: boolean): SourceMapSegment[][];

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declare type GeneratedColumn = number;
declare type SourcesIndex = number;
declare type SourceLine = number;
declare type SourceColumn = number;
declare type NamesIndex = number;
declare type GeneratedLine = number;
export declare type SourceMapSegment = [GeneratedColumn] | [GeneratedColumn, SourcesIndex, SourceLine, SourceColumn] | [GeneratedColumn, SourcesIndex, SourceLine, SourceColumn, NamesIndex];
export declare type ReverseSegment = [SourceColumn, GeneratedLine, GeneratedColumn];
export declare const COLUMN = 0;
export declare const SOURCES_INDEX = 1;
export declare const SOURCE_LINE = 2;
export declare const SOURCE_COLUMN = 3;
export declare const NAMES_INDEX = 4;
export declare const REV_GENERATED_LINE = 1;
export declare const REV_GENERATED_COLUMN = 2;
export {};

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/**
* Removes everything after the last "/", but leaves the slash.
*/
export default function stripFilename(path: string | undefined | null): string;

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import type { SourceMapSegment } from './sourcemap-segment';
import type { SourceMapV3, DecodedSourceMap, EncodedSourceMap, InvalidOriginalMapping, OriginalMapping, InvalidGeneratedMapping, GeneratedMapping, SourceMapInput, Needle, SourceNeedle, SourceMap, EachMapping } from './types';
export type { SourceMapSegment } from './sourcemap-segment';
export type { SourceMapInput, SectionedSourceMapInput, DecodedSourceMap, EncodedSourceMap, SectionedSourceMap, InvalidOriginalMapping, OriginalMapping as Mapping, OriginalMapping, InvalidGeneratedMapping, GeneratedMapping, EachMapping, } from './types';
export declare const LEAST_UPPER_BOUND = -1;
export declare const GREATEST_LOWER_BOUND = 1;
/**
* Returns the encoded (VLQ string) form of the SourceMap's mappings field.
*/
export declare let encodedMappings: (map: TraceMap) => EncodedSourceMap['mappings'];
/**
* Returns the decoded (array of lines of segments) form of the SourceMap's mappings field.
*/
export declare let decodedMappings: (map: TraceMap) => Readonly<DecodedSourceMap['mappings']>;
/**
* A low-level API to find the segment associated with a generated line/column (think, from a
* stack trace). Line and column here are 0-based, unlike `originalPositionFor`.
*/
export declare let traceSegment: (map: TraceMap, line: number, column: number) => Readonly<SourceMapSegment> | null;
/**
* A higher-level API to find the source/line/column associated with a generated line/column
* (think, from a stack trace). Line is 1-based, but column is 0-based, due to legacy behavior in
* `source-map` library.
*/
export declare let originalPositionFor: (map: TraceMap, needle: Needle) => OriginalMapping | InvalidOriginalMapping;
/**
* Finds the source/line/column directly after the mapping returned by originalPositionFor, provided
* the found mapping is from the same source and line as the originalPositionFor mapping.
*
* Eg, in the code `let id = 1`, `originalPositionAfter` could find the mapping associated with `1`
* using the same needle that would return `id` when calling `originalPositionFor`.
*/
export declare let generatedPositionFor: (map: TraceMap, needle: SourceNeedle) => GeneratedMapping | InvalidGeneratedMapping;
/**
* Iterates each mapping in generated position order.
*/
export declare let eachMapping: (map: TraceMap, cb: (mapping: EachMapping) => void) => void;
/**
* A helper that skips sorting of the input map's mappings array, which can be expensive for larger
* maps.
*/
export declare let presortedDecodedMap: (map: DecodedSourceMap, mapUrl?: string) => TraceMap;
/**
* Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects
* a sourcemap, or to JSON.stringify.
*/
export declare let decodedMap: (map: TraceMap) => Omit<DecodedSourceMap, 'mappings'> & {
mappings: readonly SourceMapSegment[][];
};
/**
* Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects
* a sourcemap, or to JSON.stringify.
*/
export declare let encodedMap: (map: TraceMap) => EncodedSourceMap;
export { AnyMap } from './any-map';
export declare class TraceMap implements SourceMap {
version: SourceMapV3['version'];
file: SourceMapV3['file'];
names: SourceMapV3['names'];
sourceRoot: SourceMapV3['sourceRoot'];
sources: SourceMapV3['sources'];
sourcesContent: SourceMapV3['sourcesContent'];
resolvedSources: string[];
private _encoded;
private _decoded;
private _decodedMemo;
private _bySources;
private _bySourceMemos;
constructor(map: SourceMapInput, mapUrl?: string | null);
}

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import type { SourceMapSegment } from './sourcemap-segment';
import type { TraceMap } from './trace-mapping';
export interface SourceMapV3 {
file?: string | null;
names: string[];
sourceRoot?: string;
sources: (string | null)[];
sourcesContent?: (string | null)[];
version: 3;
}
export interface EncodedSourceMap extends SourceMapV3 {
mappings: string;
}
export interface DecodedSourceMap extends SourceMapV3 {
mappings: SourceMapSegment[][];
}
export interface Section {
offset: {
line: number;
column: number;
};
map: EncodedSourceMap | DecodedSourceMap | SectionedSourceMap;
}
export interface SectionedSourceMap {
file?: string | null;
sections: Section[];
version: 3;
}
export declare type OriginalMapping = {
source: string | null;
line: number;
column: number;
name: string | null;
};
export declare type InvalidOriginalMapping = {
source: null;
line: null;
column: null;
name: null;
};
export declare type GeneratedMapping = {
line: number;
column: number;
};
export declare type InvalidGeneratedMapping = {
line: null;
column: null;
};
export declare type SourceMapInput = string | EncodedSourceMap | DecodedSourceMap | TraceMap;
export declare type SectionedSourceMapInput = SourceMapInput | SectionedSourceMap;
export declare type Needle = {
line: number;
column: number;
bias?: 1 | -1;
};
export declare type SourceNeedle = {
source: string;
line: number;
column: number;
bias?: 1 | -1;
};
export declare type EachMapping = {
generatedLine: number;
generatedColumn: number;
source: null;
originalLine: null;
originalColumn: null;
name: null;
} | {
generatedLine: number;
generatedColumn: number;
source: string | null;
originalLine: number;
originalColumn: number;
name: string | null;
};
export declare abstract class SourceMap {
version: SourceMapV3['version'];
file: SourceMapV3['file'];
names: SourceMapV3['names'];
sourceRoot: SourceMapV3['sourceRoot'];
sources: SourceMapV3['sources'];
sourcesContent: SourceMapV3['sourcesContent'];
resolvedSources: SourceMapV3['sources'];
}

70
node_modules/@jridgewell/trace-mapping/package.json generated vendored Normal file
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{
"name": "@jridgewell/trace-mapping",
"version": "0.3.9",
"description": "Trace the original position through a source map",
"keywords": [
"source",
"map"
],
"main": "dist/trace-mapping.umd.js",
"module": "dist/trace-mapping.mjs",
"typings": "dist/types/trace-mapping.d.ts",
"files": [
"dist"
],
"exports": {
".": {
"browser": "./dist/trace-mapping.umd.js",
"require": "./dist/trace-mapping.umd.js",
"import": "./dist/trace-mapping.mjs"
},
"./package.json": "./package.json"
},
"author": "Justin Ridgewell <justin@ridgewell.name>",
"repository": {
"type": "git",
"url": "git+https://github.com/jridgewell/trace-mapping.git"
},
"license": "MIT",
"scripts": {
"benchmark": "run-s build:rollup benchmark:*",
"benchmark:install": "cd benchmark && npm install",
"benchmark:only": "node benchmark/index.mjs",
"build": "run-s -n build:*",
"build:rollup": "rollup -c rollup.config.js",
"build:ts": "tsc --project tsconfig.build.json",
"lint": "run-s -n lint:*",
"lint:prettier": "npm run test:lint:prettier -- --write",
"lint:ts": "npm run test:lint:ts -- --fix",
"prebuild": "rm -rf dist",
"prepublishOnly": "npm run preversion",
"preversion": "run-s test build",
"test": "run-s -n test:lint test:only",
"test:debug": "ava debug",
"test:lint": "run-s -n test:lint:*",
"test:lint:prettier": "prettier --check '{src,test}/**/*.ts' '**/*.md'",
"test:lint:ts": "eslint '{src,test}/**/*.ts'",
"test:only": "c8 ava",
"test:watch": "ava --watch"
},
"devDependencies": {
"@rollup/plugin-typescript": "8.3.0",
"@typescript-eslint/eslint-plugin": "5.10.0",
"@typescript-eslint/parser": "5.10.0",
"ava": "4.0.1",
"benchmark": "2.1.4",
"c8": "7.11.0",
"esbuild": "0.14.14",
"esbuild-node-loader": "0.6.4",
"eslint": "8.7.0",
"eslint-config-prettier": "8.3.0",
"npm-run-all": "4.1.5",
"prettier": "2.5.1",
"rollup": "2.64.0",
"typescript": "4.5.4"
},
"dependencies": {
"@jridgewell/resolve-uri": "^3.0.3",
"@jridgewell/sourcemap-codec": "^1.4.10"
}
}