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54 lines
2.1 KiB
Markdown
54 lines
2.1 KiB
Markdown
# @volar/source-map
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Provides functionality related to source maps.
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## API
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### This package exports a `SourceMap` class with the following methods:
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Params:
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- `fallbackToAnyMatch`(default: false): allow the start and end offsets to come from different mappings.
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- `filter?: (data: Data) => boolean)`(default: undefined): according to mapping: Mapping<MyDataType>.data, filter out offsets that do not meet the custom conditions.
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Methods:
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- `toSourceRange(generatedStart: number, generatedEnd: number, fallbackToAnyMatch: boolean, filter?: (data: Data) => boolean)`: Returns all source start and end offsets for the given generated start and end offsets.
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- `toGeneratedRange(sourceStart: number, sourceEnd: number, fallbackToAnyMatch: boolean, filter?: (data: Data) => boolean) `: Returns all generated start and end offsets for the given source start and end offsets.
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- `toSourceLocation(generatedOffset: number, filter?: (data: Data) => boolean)`: Returns all source offsets for a given generated offset.
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- `toGeneratedLocation(sourceOffset: number, filter?: (data: Data) => boolean)`: Returns all generated offsets for a given source offset.
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## Data Structures
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### `Mapping`
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The `Mapping` is a tuple that represents a mapping in the source map. It consists of the following elements:
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- `source`: A string representing the source file. This can be `undefined`.
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- `sourceOffsets`: Offsets in the source code.
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- `generatedOffsets`: Offsets in the generated code.
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- `data`: The data associated with this mapping. The type of this data is generic and can be specified when creating a `SourceMap` instance.
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Here is an example of a `Mapping`:
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```ts
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let mapping: Mapping<MyDataType> = {
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source: '.../sourceFile.ts',
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sourceOffsets: [10],
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generatedOffsets: [30],
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lengths: [10],
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data: myData,
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};
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```
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In this example, `myData` is of type `MyDataType`, which is the type specified for the SourceMap instance.
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Remember to replace `MyDataType` and `myData` with actual types and data that are relevant to your project.
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## License
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This project is licensed under the MIT License. See the [LICENSE](LICENSE) file for more details.
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