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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; index = i++) {
- if (haystack[i][COLUMN] !== needle)
- break;
- }
- return index;
- }
- function lowerBound(haystack, needle, index) {
- for (let i = index - 1; i >= 0; index = i--) {
- 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.
- let index = upperBound(originalLine, sourceColumn, memoizedBinarySearch(originalLine, sourceColumn, memo, sourceLine));
- memo.lastIndex = ++index;
- insert(originalLine, index, [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 = parse(map);
- if (!('sections' in parsed)) {
- return new TraceMap(parsed, mapUrl);
- }
- const mappings = [];
- const sources = [];
- const sourcesContent = [];
- const names = [];
- const ignoreList = [];
- recurse(parsed, mapUrl, mappings, sources, sourcesContent, names, ignoreList, 0, 0, Infinity, Infinity);
- const joined = {
- version: 3,
- file: parsed.file,
- names,
- sources,
- sourcesContent,
- mappings,
- ignoreList,
- };
- return presortedDecodedMap(joined);
- };
- function parse(map) {
- return typeof map === 'string' ? JSON.parse(map) : map;
- }
- function recurse(input, mapUrl, mappings, sources, sourcesContent, names, ignoreList, lineOffset, columnOffset, stopLine, stopColumn) {
- const { sections } = input;
- for (let i = 0; i < sections.length; i++) {
- const { map, offset } = sections[i];
- let sl = stopLine;
- let sc = stopColumn;
- if (i + 1 < sections.length) {
- const nextOffset = sections[i + 1].offset;
- sl = Math.min(stopLine, lineOffset + nextOffset.line);
- if (sl === stopLine) {
- sc = Math.min(stopColumn, columnOffset + nextOffset.column);
- }
- else if (sl < stopLine) {
- sc = columnOffset + nextOffset.column;
- }
- }
- addSection(map, mapUrl, mappings, sources, sourcesContent, names, ignoreList, lineOffset + offset.line, columnOffset + offset.column, sl, sc);
- }
- }
- function addSection(input, mapUrl, mappings, sources, sourcesContent, names, ignoreList, lineOffset, columnOffset, stopLine, stopColumn) {
- const parsed = parse(input);
- if ('sections' in parsed)
- return recurse(...arguments);
- const map = new TraceMap(parsed, mapUrl);
- const sourcesOffset = sources.length;
- const namesOffset = names.length;
- const decoded = decodedMappings(map);
- const { resolvedSources, sourcesContent: contents, ignoreList: ignores } = map;
- append(sources, resolvedSources);
- append(names, map.names);
- if (contents)
- append(sourcesContent, contents);
- else
- for (let i = 0; i < resolvedSources.length; i++)
- sourcesContent.push(null);
- if (ignores)
- for (let i = 0; i < ignores.length; i++)
- ignoreList.push(ignores[i] + sourcesOffset);
- for (let i = 0; i < decoded.length; i++) {
- const lineI = lineOffset + i;
- // 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. But it may not have any columns that overstep, so we
- // still need to check that we don't overstep lines, too.
- if (lineI > stopLine)
- return;
- // The out line may already exist in mappings (if we're continuing the line started by a
- // previous section). Or, we may have jumped ahead several lines to start this section.
- const out = getLine(mappings, lineI);
- // 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;
- const line = decoded[i];
- 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 (lineI === stopLine && column >= stopColumn)
- return;
- if (seg.length === 1) {
- out.push([column]);
- continue;
- }
- const sourcesIndex = sourcesOffset + seg[SOURCES_INDEX];
- const sourceLine = seg[SOURCE_LINE];
- const sourceColumn = seg[SOURCE_COLUMN];
- out.push(seg.length === 4
- ? [column, sourcesIndex, sourceLine, sourceColumn]
- : [column, sourcesIndex, sourceLine, sourceColumn, namesOffset + seg[NAMES_INDEX]]);
- }
- }
- }
- function append(arr, other) {
- for (let i = 0; i < other.length; i++)
- arr.push(other[i]);
- }
- function getLine(arr, index) {
- for (let i = arr.length; i <= index; i++)
- arr[i] = [];
- return arr[index];
- }
- 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;
- class TraceMap {
- constructor(map, mapUrl) {
- const isString = typeof map === 'string';
- if (!isString && map._decodedMemo)
- 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;
- this.ignoreList = parsed.ignoreList || parsed.x_google_ignoreList || undefined;
- const from = resolve(sourceRoot || '', stripFilename(mapUrl));
- this.resolvedSources = sources.map((s) => resolve(s || '', from));
- const { mappings } = parsed;
- if (typeof mappings === 'string') {
- this._encoded = mappings;
- this._decoded = undefined;
- }
- else {
- this._encoded = undefined;
- this._decoded = maybeSort(mappings, isString);
- }
- this._decodedMemo = memoizedState();
- this._bySources = undefined;
- this._bySourceMemos = undefined;
- }
- }
- /**
- * Typescript doesn't allow friend access to private fields, so this just casts the map into a type
- * with public access modifiers.
- */
- function cast(map) {
- return map;
- }
- /**
- * Returns the encoded (VLQ string) form of the SourceMap's mappings field.
- */
- function encodedMappings(map) {
- var _a;
- var _b;
- return ((_a = (_b = cast(map))._encoded) !== null && _a !== void 0 ? _a : (_b._encoded = encode(cast(map)._decoded)));
- }
- /**
- * Returns the decoded (array of lines of segments) form of the SourceMap's mappings field.
- */
- function decodedMappings(map) {
- var _a;
- return ((_a = cast(map))._decoded || (_a._decoded = decode(cast(map)._encoded)));
- }
- /**
- * 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`.
- */
- function 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;
- const segments = decoded[line];
- const index = traceSegmentInternal(segments, cast(map)._decodedMemo, line, column, GREATEST_LOWER_BOUND);
- return index === -1 ? null : segments[index];
- }
- /**
- * 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.
- */
- function originalPositionFor(map, needle) {
- let { line, column, bias } = needle;
- 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 OMapping(null, null, null, null);
- const segments = decoded[line];
- const index = traceSegmentInternal(segments, cast(map)._decodedMemo, line, column, bias || GREATEST_LOWER_BOUND);
- if (index === -1)
- return OMapping(null, null, null, null);
- const segment = segments[index];
- if (segment.length === 1)
- return OMapping(null, null, null, null);
- const { names, resolvedSources } = map;
- return OMapping(resolvedSources[segment[SOURCES_INDEX]], segment[SOURCE_LINE] + 1, segment[SOURCE_COLUMN], segment.length === 5 ? names[segment[NAMES_INDEX]] : null);
- }
- /**
- * Finds the generated line/column position of the provided source/line/column source position.
- */
- function generatedPositionFor(map, needle) {
- const { source, line, column, bias } = needle;
- return generatedPosition(map, source, line, column, bias || GREATEST_LOWER_BOUND, false);
- }
- /**
- * Finds all generated line/column positions of the provided source/line/column source position.
- */
- function allGeneratedPositionsFor(map, needle) {
- const { source, line, column, bias } = needle;
- // SourceMapConsumer uses LEAST_UPPER_BOUND for some reason, so we follow suit.
- return generatedPosition(map, source, line, column, bias || LEAST_UPPER_BOUND, true);
- }
- /**
- * Iterates each mapping in generated position order.
- */
- function 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,
- });
- }
- }
- }
- function sourceIndex(map, source) {
- const { sources, resolvedSources } = map;
- let index = sources.indexOf(source);
- if (index === -1)
- index = resolvedSources.indexOf(source);
- return index;
- }
- /**
- * Retrieves the source content for a particular source, if its found. Returns null if not.
- */
- function sourceContentFor(map, source) {
- const { sourcesContent } = map;
- if (sourcesContent == null)
- return null;
- const index = sourceIndex(map, source);
- return index === -1 ? null : sourcesContent[index];
- }
- /**
- * Determines if the source is marked to ignore by the source map.
- */
- function isIgnored(map, source) {
- const { ignoreList } = map;
- if (ignoreList == null)
- return false;
- const index = sourceIndex(map, source);
- return index === -1 ? false : ignoreList.includes(index);
- }
- /**
- * A helper that skips sorting of the input map's mappings array, which can be expensive for larger
- * maps.
- */
- function presortedDecodedMap(map, mapUrl) {
- const tracer = new TraceMap(clone(map, []), mapUrl);
- cast(tracer)._decoded = map.mappings;
- return tracer;
- }
- /**
- * Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects
- * a sourcemap, or to JSON.stringify.
- */
- function decodedMap(map) {
- return clone(map, decodedMappings(map));
- }
- /**
- * Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects
- * a sourcemap, or to JSON.stringify.
- */
- function encodedMap(map) {
- return clone(map, encodedMappings(map));
- }
- function clone(map, mappings) {
- return {
- version: map.version,
- file: map.file,
- names: map.names,
- sourceRoot: map.sourceRoot,
- sources: map.sources,
- sourcesContent: map.sourcesContent,
- mappings,
- ignoreList: map.ignoreList || map.x_google_ignoreList,
- };
- }
- function OMapping(source, line, column, name) {
- return { source, line, column, name };
- }
- function GMapping(line, column) {
- return { line, column };
- }
- 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 -1;
- return index;
- }
- function sliceGeneratedPositions(segments, memo, line, column, bias) {
- let min = traceSegmentInternal(segments, memo, line, column, GREATEST_LOWER_BOUND);
- // We ignored the bias when tracing the segment so that we're guarnateed to find the first (in
- // insertion order) segment that matched. Even if we did respect the bias when tracing, we would
- // still need to call `lowerBound()` to find the first segment, which is slower than just looking
- // for the GREATEST_LOWER_BOUND to begin with. The only difference that matters for us is when the
- // binary search didn't match, in which case GREATEST_LOWER_BOUND just needs to increment to
- // match LEAST_UPPER_BOUND.
- if (!found && bias === LEAST_UPPER_BOUND)
- min++;
- if (min === -1 || min === segments.length)
- return [];
- // We may have found the segment that started at an earlier column. If this is the case, then we
- // need to slice all generated segments that match _that_ column, because all such segments span
- // to our desired column.
- const matchedColumn = found ? column : segments[min][COLUMN];
- // The binary search is not guaranteed to find the lower bound when a match wasn't found.
- if (!found)
- min = lowerBound(segments, matchedColumn, min);
- const max = upperBound(segments, matchedColumn, min);
- const result = [];
- for (; min <= max; min++) {
- const segment = segments[min];
- result.push(GMapping(segment[REV_GENERATED_LINE] + 1, segment[REV_GENERATED_COLUMN]));
- }
- return result;
- }
- function generatedPosition(map, source, line, column, bias, all) {
- var _a;
- 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 all ? [] : GMapping(null, null);
- const generated = ((_a = cast(map))._bySources || (_a._bySources = buildBySources(decodedMappings(map), (cast(map)._bySourceMemos = sources.map(memoizedState)))));
- const segments = generated[sourceIndex][line];
- if (segments == null)
- return all ? [] : GMapping(null, null);
- const memo = cast(map)._bySourceMemos[sourceIndex];
- if (all)
- return sliceGeneratedPositions(segments, memo, line, column, bias);
- const index = traceSegmentInternal(segments, memo, line, column, bias);
- if (index === -1)
- return GMapping(null, null);
- const segment = segments[index];
- return GMapping(segment[REV_GENERATED_LINE] + 1, segment[REV_GENERATED_COLUMN]);
- }
- export { AnyMap, GREATEST_LOWER_BOUND, LEAST_UPPER_BOUND, TraceMap, allGeneratedPositionsFor, decodedMap, decodedMappings, eachMapping, encodedMap, encodedMappings, generatedPositionFor, isIgnored, originalPositionFor, presortedDecodedMap, sourceContentFor, traceSegment };
- //# sourceMappingURL=trace-mapping.mjs.map
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