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{"version":3,"file":"gen-mapping.umd.js","sources":["../../src/gen-mapping.ts"],"sourcesContent":["import { SetArray, put } from '@jridgewell/set-array';\nimport { encode } from '@jridgewell/sourcemap-codec';\n\nimport type { SourceMapSegment } from './sourcemap-segment';\nimport type { DecodedSourceMap, EncodedSourceMap, Pos, Mapping } from './types';\n\nexport type { DecodedSourceMap, EncodedSourceMap, Mapping };\n\nexport type Options = {\n  file?: string | null;\n  sourceRoot?: string | null;\n};\n\n/**\n * A low-level API to associate a generated position with an original source position. Line and\n * column here are 0-based, unlike `addMapping`.\n */\nexport let addSegment: {\n  (\n    map: GenMapping,\n    genLine: number,\n    genColumn: number,\n    source?: null,\n    sourceLine?: null,\n    sourceColumn?: null,\n    name?: null,\n  ): void;\n  (\n    map: GenMapping,\n    genLine: number,\n    genColumn: number,\n    source: string,\n    sourceLine: number,\n    sourceColumn: number,\n    name?: null,\n  ): void;\n  (\n    map: GenMapping,\n    genLine: number,\n    genColumn: number,\n    source: string,\n    sourceLine: number,\n    sourceColumn: number,\n    name: string,\n  ): void;\n};\n\n/**\n * A high-level API to associate a generated position with an original source position. Line is\n * 1-based, but column is 0-based, due to legacy behavior in `source-map` library.\n */\nexport let addMapping: {\n  (\n    map: GenMapping,\n    mapping: {\n      generated: Pos;\n      source?: null;\n      original?: null;\n      name?: null;\n    },\n  ): void;\n  (\n    map: GenMapping,\n    mapping: {\n      generated: Pos;\n      source: string;\n      original: Pos;\n      name?: null;\n    },\n  ): void;\n  (\n    map: GenMapping,\n    mapping: {\n      generated: Pos;\n      source: string;\n      original: Pos;\n      name: string;\n    },\n  ): void;\n};\n\n/**\n * Adds/removes the content of the source file to the source map.\n */\nexport let setSourceContent: (map: GenMapping, source: string, content: string | null) => void;\n\n/**\n * Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects\n * a sourcemap, or to JSON.stringify.\n */\nexport let decodedMap: (map: GenMapping) => DecodedSourceMap;\n\n/**\n * Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects\n * a sourcemap, or to JSON.stringify.\n */\nexport let encodedMap: (map: GenMapping) => EncodedSourceMap;\n\n/**\n * Returns an array of high-level mapping objects for every recorded segment, which could then be\n * passed to the `source-map` library.\n */\nexport let allMappings: (map: GenMapping) => Mapping[];\n\n/**\n * Provides the state to generate a sourcemap.\n */\nexport class GenMapping {\n  private _names = new SetArray();\n  private _sources = new SetArray();\n  private _sourcesContent: (string | null)[] = [];\n  private _mappings: SourceMapSegment[][] = [];\n  declare file: string | null | undefined;\n  declare sourceRoot: string | null | undefined;\n\n  constructor({ file, sourceRoot }: Options = {}) {\n    this.file = file;\n    this.sourceRoot = sourceRoot;\n  }\n\n  static {\n    addSegment = (map, genLine, genColumn, source, sourceLine, sourceColumn, name) => {\n      const {\n        _mappings: mappings,\n        _sources: sources,\n        _sourcesContent: sourcesContent,\n        _names: names,\n      } = map;\n\n      const line = getLine(mappings, genLine);\n      if (source == null) {\n        const seg: SourceMapSegment = [genColumn];\n        const index = getColumnIndex(line, genColumn, seg);\n        return insert(line, index, seg);\n      }\n\n      // Sigh, TypeScript can't figure out sourceLine and sourceColumn aren't nullish if source\n      // isn't nullish.\n      assert<number>(sourceLine);\n      assert<number>(sourceColumn);\n      const sourcesIndex = put(sources, source);\n      const seg: SourceMapSegment = name\n        ? 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name: string | undefined = undefined;\n\n          if (seg.length !== 1) {\n            source = sources.array[seg[1]];\n            original = { line: seg[2] + 1, column: seg[3] };\n\n            if (seg.length === 5) name = names.array[seg[4]];\n          }\n\n          out.push({ generated, source, original, name } as Mapping);\n        }\n      }\n\n      return out;\n    };\n  }\n}\n\nfunction assert<T>(_val: unknown): asserts _val is T {\n  // noop.\n}\n\nfunction getLine(mappings: SourceMapSegment[][], index: number): SourceMapSegment[] {\n  for (let i = mappings.length; i <= index; i++) {\n    mappings[i] = [];\n  }\n  return mappings[index];\n}\n\nfunction getColumnIndex(line: SourceMapSegment[], column: number, seg: SourceMapSegment): number {\n  let index = line.length;\n  for (let i = index - 1; i >= 0; i--, index--) {\n    const current = line[i];\n    const col = current[0];\n    if (col > column) continue;\n    if (col < column) break;\n\n    const cmp = compare(current, 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