forked from M3-Academy/challenge-algorithms-v2.0
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46 KiB
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1 line
46 KiB
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{"version":3,"file":"trace-mapping.mjs","sources":["../src/resolve.ts","../src/strip-filename.ts","../src/sourcemap-segment.ts","../src/sort.ts","../src/binary-search.ts","../src/by-source.ts","../src/any-map.ts","../src/trace-mapping.ts"],"sourcesContent":["import resolveUri from '@jridgewell/resolve-uri';\n\nexport default function resolve(input: string, base: string | undefined): string {\n // The base is always treated as a directory, if it's not empty.\n // https://github.com/mozilla/source-map/blob/8cb3ee57/lib/util.js#L327\n // https://github.com/chromium/chromium/blob/da4adbb3/third_party/blink/renderer/devtools/front_end/sdk/SourceMap.js#L400-L401\n if (base && !base.endsWith('/')) base += '/';\n\n return resolveUri(input, base);\n}\n","/**\n * Removes everything after the last \"/\", but leaves the slash.\n */\nexport default function stripFilename(path: string | undefined | null): string {\n if (!path) return '';\n const index = path.lastIndexOf('/');\n return path.slice(0, index + 1);\n}\n","type GeneratedColumn = number;\ntype SourcesIndex = number;\ntype SourceLine = number;\ntype SourceColumn = number;\ntype NamesIndex = number;\n\ntype GeneratedLine = number;\n\nexport type SourceMapSegment =\n | [GeneratedColumn]\n | [GeneratedColumn, SourcesIndex, SourceLine, SourceColumn]\n | [GeneratedColumn, SourcesIndex, SourceLine, SourceColumn, NamesIndex];\n\nexport type ReverseSegment = [SourceColumn, GeneratedLine, GeneratedColumn];\n\nexport const COLUMN = 0;\nexport const SOURCES_INDEX = 1;\nexport const SOURCE_LINE = 2;\nexport const SOURCE_COLUMN = 3;\nexport const NAMES_INDEX = 4;\n\nexport const REV_GENERATED_LINE = 1;\nexport const REV_GENERATED_COLUMN = 2;\n","import { COLUMN } from './sourcemap-segment';\n\nimport type { SourceMapSegment } from './sourcemap-segment';\n\nexport default function maybeSort(\n mappings: SourceMapSegment[][],\n owned: boolean,\n): SourceMapSegment[][] {\n const unsortedIndex = nextUnsortedSegmentLine(mappings, 0);\n if (unsortedIndex === mappings.length) return mappings;\n\n // If we own the array (meaning we parsed it from JSON), then we're free to directly mutate it. If\n // not, we do not want to modify the consumer's input array.\n if (!owned) mappings = mappings.slice();\n\n for (let i = unsortedIndex; i < mappings.length; i = nextUnsortedSegmentLine(mappings, i + 1)) {\n mappings[i] = sortSegments(mappings[i], owned);\n }\n return mappings;\n}\n\nfunction nextUnsortedSegmentLine(mappings: SourceMapSegment[][], start: number): number {\n for (let i = start; i < mappings.length; i++) {\n if (!isSorted(mappings[i])) return i;\n }\n return mappings.length;\n}\n\nfunction isSorted(line: SourceMapSegment[]): boolean {\n for (let j = 1; j < line.length; j++) {\n if (line[j][COLUMN] < line[j - 1][COLUMN]) {\n return false;\n }\n }\n return true;\n}\n\nfunction sortSegments(line: SourceMapSegment[], owned: boolean): SourceMapSegment[] {\n if (!owned) line = line.slice();\n return line.sort(sortComparator);\n}\n\nfunction sortComparator(a: SourceMapSegment, b: SourceMapSegment): number {\n return a[COLUMN] - b[COLUMN];\n}\n","import type { SourceMapSegment, ReverseSegment } from './sourcemap-segment';\nimport { COLUMN } from './sourcemap-segment';\n\nexport type MemoState = {\n lastKey: number;\n lastNeedle: number;\n lastIndex: number;\n};\n\nexport let found = false;\n\n/**\n * A binary search implementation that returns the index if a match is found.\n * If no match is found, then the left-index (the index associated with the item that comes just\n * before the desired index) is returned. To maintain proper sort order, a splice would happen at\n * the next index:\n *\n * ```js\n * const array = [1, 3];\n * const needle = 2;\n * const index = binarySearch(array, needle, (item, needle) => item - needle);\n *\n * assert.equal(index, 0);\n * array.splice(index + 1, 0, needle);\n * assert.deepEqual(array, [1, 2, 3]);\n * ```\n */\nexport function binarySearch(\n haystack: SourceMapSegment[] | ReverseSegment[],\n needle: number,
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