| 1 | import {
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| 2 | AcceptedPlugin,
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| 3 | Plugin,
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| 4 | ProcessOptions,
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| 5 | Transformer,
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| 6 | TransformCallback
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| 7 | } from './postcss.js'
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| 8 | import LazyResult from './lazy-result.js'
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| 9 | import Result from './result.js'
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| 10 | import Root from './root.js'
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| 11 |
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| 12 | /**
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| 13 | * Contains plugins to process CSS. Create one `Processor` instance,
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| 14 | * initialize its plugins, and then use that instance on numerous CSS files.
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| 15 | *
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| 16 | * ```js
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| 17 | * const processor = postcss([autoprefixer, precss])
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| 18 | * processor.process(css1).then(result => console.log(result.css))
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| 19 | * processor.process(css2).then(result => console.log(result.css))
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| 20 | * ```
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| 21 | */
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| 22 | export default class Processor {
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| 23 | /**
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| 24 | * Current PostCSS version.
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| 25 | *
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| 26 | * ```js
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| 27 | * if (result.processor.version.split('.')[0] !== '6') {
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| 28 | * throw new Error('This plugin works only with PostCSS 6')
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| 29 | * }
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| 30 | * ```
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| 31 | */
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| 32 | version: string
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| 33 |
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| 34 | /**
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| 35 | * Plugins added to this processor.
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| 36 | *
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| 37 | * ```js
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| 38 | * const processor = postcss([autoprefixer, precss])
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| 39 | * processor.plugins.length //=> 2
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| 40 | * ```
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| 41 | */
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| 42 | plugins: (Plugin | Transformer | TransformCallback)[]
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| 43 |
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| 44 | /**
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| 45 | * @param plugins PostCSS plugins
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| 46 | */
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| 47 | constructor (plugins?: AcceptedPlugin[])
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| 48 |
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| 49 | /**
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| 50 | * Adds a plugin to be used as a CSS processor.
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| 51 | *
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| 52 | * PostCSS plugin can be in 4 formats:
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| 53 | * * A plugin in `Plugin` format.
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| 54 | * * A plugin creator function with `pluginCreator.postcss = true`.
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| 55 | * PostCSS will call this function without argument to get plugin.
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| 56 | * * A function. PostCSS will pass the function a @{link Root}
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| 57 | * as the first argument and current `Result` instance
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| 58 | * as the second.
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| 59 | * * Another `Processor` instance. PostCSS will copy plugins
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| 60 | * from that instance into this one.
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| 61 | *
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| 62 | * Plugins can also be added by passing them as arguments when creating
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| 63 | * a `postcss` instance (see [`postcss(plugins)`]).
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| 64 | *
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| 65 | * Asynchronous plugins should return a `Promise` instance.
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| 66 | *
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| 67 | * ```js
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| 68 | * const processor = postcss()
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| 69 | * .use(autoprefixer)
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| 70 | * .use(precss)
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| 71 | * ```
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| 72 | *
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| 73 | * plugin PostCSS plugin or `Processor` with plugins.
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| 74 | * {Processes} Current processor to make methods chain.
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| 75 | */
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| 76 | use (plugin: AcceptedPlugin): this
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| 77 |
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| 78 | /**
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| 79 | * Parses source CSS and returns a `LazyResult` Promise proxy.
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| 80 | * Because some plugins can be asynchronous it doesn’t make
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| 81 | * any transformations. Transformations will be applied
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| 82 | * in the `LazyResult` methods.
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| 83 | *
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| 84 | * ```js
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| 85 | * processor.process(css, { from: 'a.css', to: 'a.out.css' })
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| 86 | * .then(result => {
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| 87 | * console.log(result.css)
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| 88 | * })
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| 89 | * ```
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| 90 | *
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| 91 | * @param css String with input CSS or any object with a `toString()` method,
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| 92 | * like a Buffer. Optionally, senda `Result` instance
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| 93 | * and the processor will take the `Root` from it.
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| 94 | * @param opts Options.
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| 95 | * @return Promise proxy.
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| 96 | */
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| 97 | process (
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| 98 | css: string | { toString(): string } | Result | LazyResult | Root,
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| 99 | options?: ProcessOptions
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| 100 | ): LazyResult
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| 101 | }
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