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node_modules/webpack/lib/css/CssGenerator.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Sergey Melyukov @smelukov
+*/
+
+"use strict";
+
+const { ReplaceSource } = require("webpack-sources");
+const Generator = require("../Generator");
+const InitFragment = require("../InitFragment");
+const RuntimeGlobals = require("../RuntimeGlobals");
+
+/** @typedef {import("webpack-sources").Source} Source */
+/** @typedef {import("../Dependency")} Dependency */
+/** @typedef {import("../Generator").GenerateContext} GenerateContext */
+/** @typedef {import("../Generator").UpdateHashContext} UpdateHashContext */
+/** @typedef {import("../NormalModule")} NormalModule */
+/** @typedef {import("../util/Hash")} Hash */
+
+const TYPES = new Set(["css"]);
+
+class CssGenerator extends Generator {
+	constructor() {
+		super();
+	}
+
+	/**
+	 * @param {NormalModule} module module for which the code should be generated
+	 * @param {GenerateContext} generateContext context for generate
+	 * @returns {Source} generated code
+	 */
+	generate(module, generateContext) {
+		const originalSource = /** @type {Source} */ (module.originalSource());
+		const source = new ReplaceSource(originalSource);
+		/** @type {InitFragment[]} */
+		const initFragments = [];
+		const cssExports = new Map();
+
+		generateContext.runtimeRequirements.add(RuntimeGlobals.hasCssModules);
+
+		const templateContext = {
+			runtimeTemplate: generateContext.runtimeTemplate,
+			dependencyTemplates: generateContext.dependencyTemplates,
+			moduleGraph: generateContext.moduleGraph,
+			chunkGraph: generateContext.chunkGraph,
+			module,
+			runtime: generateContext.runtime,
+			runtimeRequirements: generateContext.runtimeRequirements,
+			concatenationScope: generateContext.concatenationScope,
+			codeGenerationResults: generateContext.codeGenerationResults,
+			initFragments,
+			cssExports
+		};
+
+		/**
+		 * @param {Dependency} dependency dependency
+		 */
+		const handleDependency = dependency => {
+			const constructor = /** @type {new (...args: any[]) => Dependency} */ (
+				dependency.constructor
+			);
+			const template = generateContext.dependencyTemplates.get(constructor);
+			if (!template) {
+				throw new Error(
+					"No template for dependency: " + dependency.constructor.name
+				);
+			}
+
+			template.apply(dependency, source, templateContext);
+		};
+		module.dependencies.forEach(handleDependency);
+		if (module.presentationalDependencies !== undefined)
+			module.presentationalDependencies.forEach(handleDependency);
+
+		if (cssExports.size > 0) {
+			const data = generateContext.getData();
+			data.set("css-exports", cssExports);
+		}
+
+		return InitFragment.addToSource(source, initFragments, generateContext);
+	}
+
+	/**
+	 * @param {NormalModule} module fresh module
+	 * @returns {Set<string>} available types (do not mutate)
+	 */
+	getTypes(module) {
+		return TYPES;
+	}
+
+	/**
+	 * @param {NormalModule} module the module
+	 * @param {string=} type source type
+	 * @returns {number} estimate size of the module
+	 */
+	getSize(module, type) {
+		const originalSource = module.originalSource();
+
+		if (!originalSource) {
+			return 0;
+		}
+
+		return originalSource.size();
+	}
+
+	/**
+	 * @param {Hash} hash hash that will be modified
+	 * @param {UpdateHashContext} updateHashContext context for updating hash
+	 */
+	updateHash(hash, { module }) {}
+}
+
+module.exports = CssGenerator;