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					553 lines
				
				21 KiB
			| 
											3 years ago
										 | 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.
 | ||
|  |             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 = []; | ||
|  |     recurse(parsed, mapUrl, mappings, sources, sourcesContent, names, 0, 0, Infinity, Infinity); | ||
|  |     const joined = { | ||
|  |         version: 3, | ||
|  |         file: parsed.file, | ||
|  |         names, | ||
|  |         sources, | ||
|  |         sourcesContent, | ||
|  |         mappings, | ||
|  |     }; | ||
|  |     return presortedDecodedMap(joined); | ||
|  | }; | ||
|  | function recurse(input, mapUrl, mappings, sources, sourcesContent, names, 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, lineOffset + offset.line, columnOffset + offset.column, sl, sc); | ||
|  |     } | ||
|  | } | ||
|  | function addSection(input, mapUrl, mappings, sources, sourcesContent, names, lineOffset, columnOffset, stopLine, stopColumn) { | ||
|  |     if ('sections' in input) | ||
|  |         return recurse(...arguments); | ||
|  |     const map = new TraceMap(input, mapUrl); | ||
|  |     const sourcesOffset = sources.length; | ||
|  |     const namesOffset = names.length; | ||
|  |     const decoded = decodedMappings(map); | ||
|  |     const { resolvedSources, sourcesContent: contents } = 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); | ||
|  |     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; | ||
|  | /** | ||
|  |  * 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 generated line/column position of the provided source/line/column source position. | ||
|  |  */ | ||
|  | let generatedPositionFor; | ||
|  | /** | ||
|  |  * Finds all generated line/column positions of the provided source/line/column source position. | ||
|  |  */ | ||
|  | let allGeneratedPositionsFor; | ||
|  | /** | ||
|  |  * Iterates each mapping in generated position order. | ||
|  |  */ | ||
|  | let eachMapping; | ||
|  | /** | ||
|  |  * Retrieves the source content for a particular source, if its found. Returns null if not. | ||
|  |  */ | ||
|  | let sourceContentFor; | ||
|  | /** | ||
|  |  * 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) { | ||
|  |         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; | ||
|  |         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; | ||
|  |     } | ||
|  | } | ||
|  | (() => { | ||
|  |     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; | ||
|  |         const segments = decoded[line]; | ||
|  |         const index = traceSegmentInternal(segments, map._decodedMemo, line, column, GREATEST_LOWER_BOUND); | ||
|  |         return index === -1 ? null : segments[index]; | ||
|  |     }; | ||
|  |     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 OMapping(null, null, null, null); | ||
|  |         const segments = decoded[line]; | ||
|  |         const index = traceSegmentInternal(segments, 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); | ||
|  |     }; | ||
|  |     allGeneratedPositionsFor = (map, { source, line, column, bias }) => { | ||
|  |         // SourceMapConsumer uses LEAST_UPPER_BOUND for some reason, so we follow suit.
 | ||
|  |         return generatedPosition(map, source, line, column, bias || LEAST_UPPER_BOUND, true); | ||
|  |     }; | ||
|  |     generatedPositionFor = (map, { source, line, column, bias }) => { | ||
|  |         return generatedPosition(map, source, line, column, bias || GREATEST_LOWER_BOUND, false); | ||
|  |     }; | ||
|  |     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, | ||
|  |                 }); | ||
|  |             } | ||
|  |         } | ||
|  |     }; | ||
|  |     sourceContentFor = (map, source) => { | ||
|  |         const { sources, resolvedSources, sourcesContent } = map; | ||
|  |         if (sourcesContent == null) | ||
|  |             return null; | ||
|  |         let index = sources.indexOf(source); | ||
|  |         if (index === -1) | ||
|  |             index = resolvedSources.indexOf(source); | ||
|  |         return index === -1 ? null : sourcesContent[index]; | ||
|  |     }; | ||
|  |     presortedDecodedMap = (map, mapUrl) => { | ||
|  |         const tracer = new TraceMap(clone(map, []), mapUrl); | ||
|  |         tracer._decoded = map.mappings; | ||
|  |         return tracer; | ||
|  |     }; | ||
|  |     decodedMap = (map) => { | ||
|  |         return clone(map, decodedMappings(map)); | ||
|  |     }; | ||
|  |     encodedMap = (map) => { | ||
|  |         return clone(map, encodedMappings(map)); | ||
|  |     }; | ||
|  |     function generatedPosition(map, source, line, column, bias, all) { | ||
|  |         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 = (map._bySources || (map._bySources = buildBySources(decodedMappings(map), (map._bySourceMemos = sources.map(memoizedState))))); | ||
|  |         const segments = generated[sourceIndex][line]; | ||
|  |         if (segments == null) | ||
|  |             return all ? [] : GMapping(null, null); | ||
|  |         const memo = 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]); | ||
|  |     } | ||
|  | })(); | ||
|  | function clone(map, mappings) { | ||
|  |     return { | ||
|  |         version: map.version, | ||
|  |         file: map.file, | ||
|  |         names: map.names, | ||
|  |         sourceRoot: map.sourceRoot, | ||
|  |         sources: map.sources, | ||
|  |         sourcesContent: map.sourcesContent, | ||
|  |         mappings, | ||
|  |     }; | ||
|  | } | ||
|  | 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; | ||
|  | } | ||
|  | 
 | ||
|  | export { AnyMap, GREATEST_LOWER_BOUND, LEAST_UPPER_BOUND, TraceMap, allGeneratedPositionsFor, decodedMap, decodedMappings, eachMapping, encodedMap, encodedMappings, generatedPositionFor, originalPositionFor, presortedDecodedMap, sourceContentFor, traceSegment }; | ||
|  | //# sourceMappingURL=trace-mapping.mjs.map
 |