webpack/lib/dependencies/CssImportDependency.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Ivan Kopeykin @vankop
*/

"use strict";

const makeSerializable = require("../util/makeSerializable");
const ModuleDependency = require("./ModuleDependency");

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../ChunkGraph")} ChunkGraph */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../Module")} Module */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../ModuleGraphConnection")} ModuleGraphConnection */
/** @typedef {import("../ModuleGraphConnection").ConnectionState} ConnectionState */
/** @typedef {import("../css/CssParser").Range} Range */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
/** @typedef {import("../util/Hash")} Hash */
/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */

class CssImportDependency extends ModuleDependency {
	/**
	 * Example of dependency:
	 *
	 * \@import url("landscape.css") layer(forms) screen and (orientation: landscape) screen and (orientation: landscape);
	 *
	 * @param {string} request request
	 * @param {Range} range range of the argument
	 * @param {string | undefined} layer layer
	 * @param {string | undefined} supports list of supports conditions
	 * @param {string | undefined} media list of media conditions
	 */
	constructor(request, range, layer, supports, media) {
		super(request);
		this.range = range;
		this.layer = layer;
		this.supports = supports;
		this.media = media;
	}

	get type() {
		return "css @import";
	}

	get category() {
		return "css-import";
	}

	/**
	 * @returns {string | null} an identifier to merge equal requests
	 */
	getResourceIdentifier() {
		let str = `context${this._context || ""}|module${this.request}`;

		if (this.layer) {
			str += `|layer${this.layer}`;
		}

		if (this.supports) {
			str += `|supports${this.supports}`;
		}

		if (this.media) {
			str += `|media${this.media}`;
		}

		return str;
	}

	/**
	 * @param {string} context context directory
	 * @returns {Module | null} a module
	 */
	createIgnoredModule(context) {
		return null;
	}

	/**
	 * @param {ObjectSerializerContext} context context
	 */
	serialize(context) {
		const { write } = context;
		write(this.layer);
		write(this.supports);
		write(this.media);
		super.serialize(context);
	}

	/**
	 * @param {ObjectDeserializerContext} context context
	 */
	deserialize(context) {
		const { read } = context;
		this.layer = read();
		this.supports = read();
		this.media = read();
		super.deserialize(context);
	}
}

CssImportDependency.Template = class CssImportDependencyTemplate extends (
	ModuleDependency.Template
) {
	/**
	 * @param {Dependency} dependency the dependency for which the template should be applied
	 * @param {ReplaceSource} source the current replace source which can be modified
	 * @param {DependencyTemplateContext} templateContext the context object
	 * @returns {void}
	 */
	apply(dependency, source, templateContext) {
		const dep = /** @type {CssImportDependency} */ (dependency);

		source.replace(dep.range[0], dep.range[1] - 1, "");
	}
};

makeSerializable(
	CssImportDependency,
	"webpack/lib/dependencies/CssImportDependency"
);

module.exports = CssImportDependency;