220 lines
5.0 KiB
Markdown
220 lines
5.0 KiB
Markdown
# webpack-sources
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Contains multiple classes which represent a `Source`. A `Source` can be asked for source code, size, source map and hash.
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## `Source`
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Base class for all sources.
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### Public methods
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All methods should be considered as expensive as they may need to do computations.
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#### `source`
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``` js
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Source.prototype.source() -> String
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```
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Returns the represented source code as string.
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#### `size`
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``` js
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Source.prototype.size() -> Number
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```
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Returns the size in chars of the represented source code.
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#### `map`
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``` js
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Source.prototype.map(options: Object) -> Object | null
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```
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Returns the SourceMap of the represented source code as JSON. May return `null` if no SourceMap is available.
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The `options` object can contain the following keys:
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* `columns: Boolean` (default `true`): If set to false the implementation may omit mappings for columns.
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* `module: Boolean` (default `true`): If set to false the implementation may omit inner mappings for modules.
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#### `sourceAndMap`
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``` js
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Source.prototype.sourceAndMap(options: Object) -> {
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code: String,
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map: Object
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}
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```
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Returns both, source code (like `Source.prototype.source()` and SourceMap (like `Source.prototype.map()`). This method could have better performance than calling `source()` and `map()` separatly.
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See `map()` for `options`.
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#### `updateHash`
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``` js
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Source.prototype.updateHash(hash: Hash) -> void
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```
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Updates the provided `Hash` object with the content of the represented source code. (`Hash` is an object with an `update` method, which is called with string values)
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#### `node` (optional)
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``` js
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Source.prototype.node(options: Object) -> SourceNode
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```
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This is an optional method. It may be `null` if not implemented.
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Returns a `SourceNode` (see source-map library) for the represented source code.
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See `map()` for `options`.
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#### `listNode` (optional)
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``` js
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Source.prototype.listNode(options: Object) -> SourceNode
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```
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This is an optional method. It may be `null` if not implemented.
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Returns a `SourceListMap` (see source-list-map library) for the represented source code.
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See `map()` for `options`.
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## `RawSource`
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Represents source code without SourceMap.
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``` js
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new RawSource(sourceCode: String)
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```
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## `OriginalSource`
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Represents source code, which is a copy of the original file.
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``` js
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new OriginalSource(
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sourceCode: String,
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name: String
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)
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```
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* `sourceCode`: The source code.
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* `name`: The filename of the original source code.
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OriginalSource tries to create column mappings if requested, by splitting the source code at typical statement borders (`;`, `{`, `}`).
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## `SourceMapSource`
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Represents source code with SourceMap, optionally having an additional SourceMap for the original source.
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``` js
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new SourceMapSource(
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sourceCode: String,
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name: String,
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sourceMap: Object | String,
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originalSource?: String,
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innerSourceMap?: Object | String
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)
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```
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* `sourceCode`: The source code.
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* `name`: The filename of the original source code.
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* `sourceMap`: The SourceMap for the source code.
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* `originalSource`: The source code of the original file. Can be omitted if the `sourceMap` already contains the original source code.
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* `innerSourceMap`: The SourceMap for the `originalSource`/`name`.
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## `LineToLineMappedSource`
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Represents source code, which is mapped line by line to the orginal file.
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``` js
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new LineToLineMappedSource(
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sourceCode: String,
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name: String,
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originalSource: String
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)
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```
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* `sourceCode`: The source code.
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* `name`: The filename of the original source code.
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* `originalSource`: The original source code.
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## `CachedSource`
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Decorates a `Source` and caches returned results of `map`, `source`, `size` and `sourceAndMap` in memory. Every other operation is delegated to the wrapped `Source`.
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``` js
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new CachedSource(source: Source)
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```
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## `PrefixSource`
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Prefix every line of the decorated `Source` with a provided string.
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``` js
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new PrefixSource(
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prefix: String,
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source: Source
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)
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```
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## `ConcatSource`
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Concatenate mulitple `Source`s or strings to a single source.
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``` js
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new ConcatSource(
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...items?: Source | String
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)
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```
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### Public methods
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#### `add`
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``` js
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ConcatSource.prototype.add(item: Source | String)
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```
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Adds an item to the source.
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## `ReplaceSource`
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Decorates a `Source` with replacements and insertions of source code.
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### Public methods
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#### `replace`
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``` js
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ReplaceSource.prototype.replace(
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start: Number,
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end: Number,
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replacement: String
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)
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```
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Replaces chars from `start` (0-indexed, inclusive) to `end` (0-indexed, inclusive) with `replacement`.
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Locations represents locations in the original source and are not influenced by other replacements or insertions.
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#### `insert`
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``` js
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ReplaceSource.prototype.insert(
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pos: Number,
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insertion: String
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)
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```
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Inserts the `insertion` before char `pos` (0-indexed).
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Location represents location in the original source and is not influenced by other replacements or insertions.
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