source: frontend/node_modules/webpack/lib/dependencies/CssImportDependency.js

/*
        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("../Dependency")} Dependency */
/** @typedef {import("../DependencyTemplate").CssDependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../css/CssParser").Range} Range */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */

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 {"local" | "global"=} mode mode of the parsed CSS
         * @param {string=} layer layer
         * @param {string=} supports list of supports conditions
         * @param {string=} media list of media conditions
         */
        constructor(request, range, mode, layer, supports, media) {
                super(request);
                this.range = range;
                this.mode = mode;
                this.layer = layer;
                this.supports = supports;
                this.media = media;
        }

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

        get category() {
                return `css-import${this.mode ? `-${this.mode}-module` : ""}`;
        }

        /**
         * Returns true if this dependency can be concatenated
         * @returns {boolean} true if this dependency can be concatenated
         */
        canConcatenate() {
                return true;
        }

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

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

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

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

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

                return str;
        }

        /**
         * Serializes this instance into the provided serializer context.
         * @param {ObjectSerializerContext} context context
         */
        serialize(context) {
                const { write } = context;
                write(this.range);
                write(this.mode);
                write(this.layer);
                write(this.supports);
                write(this.media);
                super.serialize(context);
        }

        /**
         * Restores this instance from the provided deserializer context.
         * @param {ObjectDeserializerContext} context context
         */
        deserialize(context) {
                const { read } = context;
                this.range = read();
                this.mode = read();
                this.layer = read();
                this.supports = read();
                this.media = read();
                super.deserialize(context);
        }
}

CssImportDependency.Template = class CssImportDependencyTemplate extends (
        ModuleDependency.Template
) {
        /**
         * Applies the plugin by registering its hooks on the compiler.
         * @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) {
                if (templateContext.type === "javascript") return;
                const dep = /** @type {CssImportDependency} */ (dependency);

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

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

module.exports = CssImportDependency;