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+# webpack-sources
+
+Contains multiple classes which represent a `Source`. A `Source` can be asked for source code, size, source map and hash.
+
+## `Source`
+
+Base class for all sources.
+
+### Public methods
+
+All methods should be considered as expensive as they may need to do computations.
+
+#### `source`
+
+```typescript
+Source.prototype.source() -> String | Buffer
+```
+
+Returns the represented source code as string or Buffer (for binary Sources).
+
+#### `buffer`
+
+```typescript
+Source.prototype.buffer() -> Buffer
+```
+
+Returns the represented source code as Buffer. Strings are converted to utf-8.
+
+#### `size`
+
+```typescript
+Source.prototype.size() -> Number
+```
+
+Returns the size in bytes of the represented source code.
+
+#### `map`
+
+```typescript
+Source.prototype.map(options?: Object) -> Object | null
+```
+
+Returns the SourceMap of the represented source code as JSON. May return `null` if no SourceMap is available.
+
+The `options` object can contain the following keys:
+
+- `columns: Boolean` (default `true`): If set to false the implementation may omit mappings for columns.
+
+#### `sourceAndMap`
+
+```typescript
+Source.prototype.sourceAndMap(options?: Object) -> {
+	source: String | Buffer,
+	map: Object | null
+}
+```
+
+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()` separately.
+
+See `map()` for `options`.
+
+#### `updateHash`
+
+```typescript
+Source.prototype.updateHash(hash: Hash) -> void
+```
+
+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)
+
+## `RawSource`
+
+Represents source code without SourceMap.
+
+```typescript
+new RawSource(sourceCode: String | Buffer)
+```
+
+## `OriginalSource`
+
+Represents source code, which is a copy of the original file.
+
+```typescript
+new OriginalSource(
+	sourceCode: String | Buffer,
+	name: String
+)
+```
+
+- `sourceCode`: The source code.
+- `name`: The filename of the original source code.
+
+OriginalSource tries to create column mappings if requested, by splitting the source code at typical statement borders (`;`, `{`, `}`).
+
+## `SourceMapSource`
+
+Represents source code with SourceMap, optionally having an additional SourceMap for the original source.
+
+```typescript
+new SourceMapSource(
+	sourceCode: String | Buffer,
+	name: String,
+	sourceMap: Object | String | Buffer,
+	originalSource?: String | Buffer,
+	innerSourceMap?: Object | String | Buffer,
+	removeOriginalSource?: boolean
+)
+```
+
+- `sourceCode`: The source code.
+- `name`: The filename of the original source code.
+- `sourceMap`: The SourceMap for the source code.
+- `originalSource`: The source code of the original file. Can be omitted if the `sourceMap` already contains the original source code.
+- `innerSourceMap`: The SourceMap for the `originalSource`/`name`.
+- `removeOriginalSource`: Removes the source code for `name` from the final map, keeping only the deeper mappings for that file.
+
+The `SourceMapSource` supports "identity" mappings for the `innerSourceMap`.
+When original source matches generated source for a mapping it's assumed to be mapped char by char allowing to keep finer mappings from `sourceMap`.
+
+## `CachedSource`
+
+Decorates a `Source` and caches returned results of `map`, `source`, `buffer`, `size` and `sourceAndMap` in memory. `updateHash` is not cached.
+It tries to reused cached results from other methods to avoid calculations, i. e. when `source` is already cached, calling `size` will get the size from the cached source, calling `sourceAndMap` will only call `map` on the wrapped Source.
+
+```typescript
+new CachedSource(source: Source)
+new CachedSource(source: Source | () => Source, cachedData?: CachedData)
+```
+
+Instead of passing a `Source` object directly one can pass an function that returns a `Source` object. The function is only called when needed and once.
+
+### Public methods
+
+#### `getCachedData()`
+
+Returns the cached data for passing to the constructor. All cached entries are converted to Buffers and strings are avoided.
+
+#### `original()`
+
+Returns the original `Source` object.
+
+#### `originalLazy()`
+
+Returns the original `Source` object or a function returning these.
+
+## `PrefixSource`
+
+Prefix every line of the decorated `Source` with a provided string.
+
+```typescript
+new PrefixSource(
+	prefix: String,
+	source: Source | String | Buffer
+)
+```
+
+## `ConcatSource`
+
+Concatenate multiple `Source`s or strings to a single source.
+
+```typescript
+new ConcatSource(
+	...items?: Source | String
+)
+```
+
+### Public methods
+
+#### `add`
+
+```typescript
+ConcatSource.prototype.add(item: Source | String)
+```
+
+Adds an item to the source.
+
+## `ReplaceSource`
+
+Decorates a `Source` with replacements and insertions of source code.
+
+The `ReplaceSource` supports "identity" mappings for child source.
+When original source matches generated source for a mapping it's assumed to be mapped char by char allowing to split mappings at replacements/insertions.
+
+### Public methods
+
+#### `replace`
+
+```typescript
+ReplaceSource.prototype.replace(
+	start: Number,
+	end: Number,
+	replacement: String
+)
+```
+
+Replaces chars from `start` (0-indexed, inclusive) to `end` (0-indexed, inclusive) with `replacement`.
+
+Locations represents locations in the original source and are not influenced by other replacements or insertions.
+
+#### `insert`
+
+```typescript
+ReplaceSource.prototype.insert(
+	pos: Number,
+	insertion: String
+)
+```
+
+Inserts the `insertion` before char `pos` (0-indexed).
+
+Location represents location in the original source and is not influenced by other replacements or insertions.
+
+#### `original`
+
+Get decorated `Source`.
+
+## `CompatSource`
+
+Converts a Source-like object into a real Source object.
+
+### Public methods
+
+#### static `from`
+
+```typescript
+CompatSource.from(sourceLike: any | Source)
+```
+
+If `sourceLike` is a real Source it returns it unmodified. Otherwise it returns it wrapped in a CompatSource.