CasperSecurity
import {
AcceptedPlugin,
Plugin,
ProcessOptions,
Transformer,
TransformCallback
} from './postcss.js'
import LazyResult from './lazy-result.js'
import Result from './result.js'
import Root from './root.js'
import NoWorkResult from './no-work-result.js'
/**
* Contains plugins to process CSS. Create one `Processor` instance,
* initialize its plugins, and then use that instance on numerous CSS files.
*
* ```js
* const processor = postcss([autoprefixer, postcssNested])
* processor.process(css1).then(result => console.log(result.css))
* processor.process(css2).then(result => console.log(result.css))
* ```
*/
export default class Processor {
/**
* Current PostCSS version.
*
* ```js
* if (result.processor.version.split('.')[0] !== '6') {
* throw new Error('This plugin works only with PostCSS 6')
* }
* ```
*/
version: string
/**
* Plugins added to this processor.
*
* ```js
* const processor = postcss([autoprefixer, postcssNested])
* processor.plugins.length //=> 2
* ```
*/
plugins: (Plugin | Transformer | TransformCallback)[]
/**
* @param plugins PostCSS plugins
*/
constructor(plugins?: AcceptedPlugin[])
/**
* Adds a plugin to be used as a CSS processor.
*
* PostCSS plugin can be in 4 formats:
* * A plugin in `Plugin` format.
* * A plugin creator function with `pluginCreator.postcss = true`.
* PostCSS will call this function without argument to get plugin.
* * A function. PostCSS will pass the function a @{link Root}
* as the first argument and current `Result` instance
* as the second.
* * Another `Processor` instance. PostCSS will copy plugins
* from that instance into this one.
*
* Plugins can also be added by passing them as arguments when creating
* a `postcss` instance (see [`postcss(plugins)`]).
*
* Asynchronous plugins should return a `Promise` instance.
*
* ```js
* const processor = postcss()
* .use(autoprefixer)
* .use(postcssNested)
* ```
*
* @param plugin PostCSS plugin or `Processor` with plugins.
* @return {Processes} Current processor to make methods chain.
*/
use(plugin: AcceptedPlugin): this
/**
* Parses source CSS and returns a `LazyResult` Promise proxy.
* Because some plugins can be asynchronous it doesn’t make
* any transformations. Transformations will be applied
* in the `LazyResult` methods.
*
* ```js
* processor.process(css, { from: 'a.css', to: 'a.out.css' })
* .then(result => {
* console.log(result.css)
* })
* ```
*
* @param css String with input CSS or any object with a `toString()` method,
* like a Buffer. Optionally, senda `Result` instance
* and the processor will take the `Root` from it.
* @param opts Options.
* @return Promise proxy.
*/
process(
css: string | { toString(): string } | Result | LazyResult | Root,
options?: ProcessOptions
): LazyResult | NoWorkResult
}