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node_modules/webpack/lib/css/CssModulesPlugin.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const { ConcatSource } = require("webpack-sources");
+const HotUpdateChunk = require("../HotUpdateChunk");
+const RuntimeGlobals = require("../RuntimeGlobals");
+const SelfModuleFactory = require("../SelfModuleFactory");
+const CssExportDependency = require("../dependencies/CssExportDependency");
+const CssImportDependency = require("../dependencies/CssImportDependency");
+const CssLocalIdentifierDependency = require("../dependencies/CssLocalIdentifierDependency");
+const CssSelfLocalIdentifierDependency = require("../dependencies/CssSelfLocalIdentifierDependency");
+const CssUrlDependency = require("../dependencies/CssUrlDependency");
+const StaticExportsDependency = require("../dependencies/StaticExportsDependency");
+const { compareModulesByIdentifier } = require("../util/comparators");
+const createSchemaValidation = require("../util/create-schema-validation");
+const createHash = require("../util/createHash");
+const memoize = require("../util/memoize");
+const nonNumericOnlyHash = require("../util/nonNumericOnlyHash");
+const CssExportsGenerator = require("./CssExportsGenerator");
+const CssGenerator = require("./CssGenerator");
+const CssParser = require("./CssParser");
+
+/** @typedef {import("webpack-sources").Source} Source */
+/** @typedef {import("../../declarations/WebpackOptions").CssExperimentOptions} CssExperimentOptions */
+/** @typedef {import("../Chunk")} Chunk */
+/** @typedef {import("../Compiler")} Compiler */
+/** @typedef {import("../Module")} Module */
+
+const getCssLoadingRuntimeModule = memoize(() =>
+	require("./CssLoadingRuntimeModule")
+);
+
+const getSchema = name => {
+	const { definitions } = require("../../schemas/WebpackOptions.json");
+	return {
+		definitions,
+		oneOf: [{ $ref: `#/definitions/${name}` }]
+	};
+};
+
+const validateGeneratorOptions = createSchemaValidation(
+	require("../../schemas/plugins/css/CssGeneratorOptions.check.js"),
+	() => getSchema("CssGeneratorOptions"),
+	{
+		name: "Css Modules Plugin",
+		baseDataPath: "parser"
+	}
+);
+const validateParserOptions = createSchemaValidation(
+	require("../../schemas/plugins/css/CssParserOptions.check.js"),
+	() => getSchema("CssParserOptions"),
+	{
+		name: "Css Modules Plugin",
+		baseDataPath: "parser"
+	}
+);
+
+const escapeCss = (str, omitOptionalUnderscore) => {
+	const escaped = `${str}`.replace(
+		// cspell:word uffff
+		/[^a-zA-Z0-9_\u0081-\uffff-]/g,
+		s => `\\${s}`
+	);
+	return !omitOptionalUnderscore && /^(?!--)[0-9_-]/.test(escaped)
+		? `_${escaped}`
+		: escaped;
+};
+
+const plugin = "CssModulesPlugin";
+
+class CssModulesPlugin {
+	/**
+	 * @param {CssExperimentOptions} options options
+	 */
+	constructor({ exportsOnly = false }) {
+		this._exportsOnly = exportsOnly;
+	}
+	/**
+	 * Apply the plugin
+	 * @param {Compiler} compiler the compiler instance
+	 * @returns {void}
+	 */
+	apply(compiler) {
+		compiler.hooks.compilation.tap(
+			plugin,
+			(compilation, { normalModuleFactory }) => {
+				const selfFactory = new SelfModuleFactory(compilation.moduleGraph);
+				compilation.dependencyFactories.set(
+					CssUrlDependency,
+					normalModuleFactory
+				);
+				compilation.dependencyTemplates.set(
+					CssUrlDependency,
+					new CssUrlDependency.Template()
+				);
+				compilation.dependencyTemplates.set(
+					CssLocalIdentifierDependency,
+					new CssLocalIdentifierDependency.Template()
+				);
+				compilation.dependencyFactories.set(
+					CssSelfLocalIdentifierDependency,
+					selfFactory
+				);
+				compilation.dependencyTemplates.set(
+					CssSelfLocalIdentifierDependency,
+					new CssSelfLocalIdentifierDependency.Template()
+				);
+				compilation.dependencyTemplates.set(
+					CssExportDependency,
+					new CssExportDependency.Template()
+				);
+				compilation.dependencyFactories.set(
+					CssImportDependency,
+					normalModuleFactory
+				);
+				compilation.dependencyTemplates.set(
+					CssImportDependency,
+					new CssImportDependency.Template()
+				);
+				compilation.dependencyTemplates.set(
+					StaticExportsDependency,
+					new StaticExportsDependency.Template()
+				);
+				normalModuleFactory.hooks.createParser
+					.for("css")
+					.tap(plugin, parserOptions => {
+						validateParserOptions(parserOptions);
+						return new CssParser();
+					});
+				normalModuleFactory.hooks.createParser
+					.for("css/global")
+					.tap(plugin, parserOptions => {
+						validateParserOptions(parserOptions);
+						return new CssParser({
+							allowPseudoBlocks: false,
+							allowModeSwitch: false
+						});
+					});
+				normalModuleFactory.hooks.createParser
+					.for("css/module")
+					.tap(plugin, parserOptions => {
+						validateParserOptions(parserOptions);
+						return new CssParser({
+							defaultMode: "local"
+						});
+					});
+				normalModuleFactory.hooks.createGenerator
+					.for("css")
+					.tap(plugin, generatorOptions => {
+						validateGeneratorOptions(generatorOptions);
+						return this._exportsOnly
+							? new CssExportsGenerator()
+							: new CssGenerator();
+					});
+				normalModuleFactory.hooks.createGenerator
+					.for("css/global")
+					.tap(plugin, generatorOptions => {
+						validateGeneratorOptions(generatorOptions);
+						return this._exportsOnly
+							? new CssExportsGenerator()
+							: new CssGenerator();
+					});
+				normalModuleFactory.hooks.createGenerator
+					.for("css/module")
+					.tap(plugin, generatorOptions => {
+						validateGeneratorOptions(generatorOptions);
+						return this._exportsOnly
+							? new CssExportsGenerator()
+							: new CssGenerator();
+					});
+				const orderedCssModulesPerChunk = new WeakMap();
+				compilation.hooks.afterCodeGeneration.tap("CssModulesPlugin", () => {
+					const { chunkGraph } = compilation;
+					for (const chunk of compilation.chunks) {
+						if (CssModulesPlugin.chunkHasCss(chunk, chunkGraph)) {
+							orderedCssModulesPerChunk.set(
+								chunk,
+								this.getOrderedChunkCssModules(chunk, chunkGraph, compilation)
+							);
+						}
+					}
+				});
+				compilation.hooks.contentHash.tap("CssModulesPlugin", chunk => {
+					const {
+						chunkGraph,
+						outputOptions: {
+							hashSalt,
+							hashDigest,
+							hashDigestLength,
+							hashFunction
+						}
+					} = compilation;
+					const modules = orderedCssModulesPerChunk.get(chunk);
+					if (modules === undefined) return;
+					const hash = createHash(hashFunction);
+					if (hashSalt) hash.update(hashSalt);
+					for (const module of modules) {
+						hash.update(chunkGraph.getModuleHash(module, chunk.runtime));
+					}
+					const digest = /** @type {string} */ (hash.digest(hashDigest));
+					chunk.contentHash.css = nonNumericOnlyHash(digest, hashDigestLength);
+				});
+				compilation.hooks.renderManifest.tap(plugin, (result, options) => {
+					const { chunkGraph } = compilation;
+					const { hash, chunk, codeGenerationResults } = options;
+
+					if (chunk instanceof HotUpdateChunk) return result;
+
+					const modules = orderedCssModulesPerChunk.get(chunk);
+					if (modules !== undefined) {
+						result.push({
+							render: () =>
+								this.renderChunk({
+									chunk,
+									chunkGraph,
+									codeGenerationResults,
+									uniqueName: compilation.outputOptions.uniqueName,
+									modules
+								}),
+							filenameTemplate: CssModulesPlugin.getChunkFilenameTemplate(
+								chunk,
+								compilation.outputOptions
+							),
+							pathOptions: {
+								hash,
+								runtime: chunk.runtime,
+								chunk,
+								contentHashType: "css"
+							},
+							identifier: `css${chunk.id}`,
+							hash: chunk.contentHash.css
+						});
+					}
+					return result;
+				});
+				const enabledChunks = new WeakSet();
+				const handler = (chunk, set) => {
+					if (enabledChunks.has(chunk)) {
+						return;
+					}
+					enabledChunks.add(chunk);
+
+					set.add(RuntimeGlobals.publicPath);
+					set.add(RuntimeGlobals.getChunkCssFilename);
+					set.add(RuntimeGlobals.hasOwnProperty);
+					set.add(RuntimeGlobals.moduleFactoriesAddOnly);
+					set.add(RuntimeGlobals.makeNamespaceObject);
+
+					const CssLoadingRuntimeModule = getCssLoadingRuntimeModule();
+					compilation.addRuntimeModule(chunk, new CssLoadingRuntimeModule(set));
+				};
+				compilation.hooks.runtimeRequirementInTree
+					.for(RuntimeGlobals.hasCssModules)
+					.tap(plugin, handler);
+				compilation.hooks.runtimeRequirementInTree
+					.for(RuntimeGlobals.ensureChunkHandlers)
+					.tap(plugin, handler);
+				compilation.hooks.runtimeRequirementInTree
+					.for(RuntimeGlobals.hmrDownloadUpdateHandlers)
+					.tap(plugin, handler);
+			}
+		);
+	}
+
+	getModulesInOrder(chunk, modules, compilation) {
+		if (!modules) return [];
+
+		const modulesList = [...modules];
+
+		// Get ordered list of modules per chunk group
+		// Lists are in reverse order to allow to use Array.pop()
+		const modulesByChunkGroup = Array.from(chunk.groupsIterable, chunkGroup => {
+			const sortedModules = modulesList
+				.map(module => {
+					return {
+						module,
+						index: chunkGroup.getModulePostOrderIndex(module)
+					};
+				})
+				.filter(item => item.index !== undefined)
+				.sort((a, b) => b.index - a.index)
+				.map(item => item.module);
+
+			return { list: sortedModules, set: new Set(sortedModules) };
+		});
+
+		if (modulesByChunkGroup.length === 1)
+			return modulesByChunkGroup[0].list.reverse();
+
+		const compareModuleLists = ({ list: a }, { list: b }) => {
+			if (a.length === 0) {
+				return b.length === 0 ? 0 : 1;
+			} else {
+				if (b.length === 0) return -1;
+				return compareModulesByIdentifier(a[a.length - 1], b[b.length - 1]);
+			}
+		};
+
+		modulesByChunkGroup.sort(compareModuleLists);
+
+		const finalModules = [];
+
+		for (;;) {
+			const failedModules = new Set();
+			const list = modulesByChunkGroup[0].list;
+			if (list.length === 0) {
+				// done, everything empty
+				break;
+			}
+			let selectedModule = list[list.length - 1];
+			let hasFailed = undefined;
+			outer: for (;;) {
+				for (const { list, set } of modulesByChunkGroup) {
+					if (list.length === 0) continue;
+					const lastModule = list[list.length - 1];
+					if (lastModule === selectedModule) continue;
+					if (!set.has(selectedModule)) continue;
+					failedModules.add(selectedModule);
+					if (failedModules.has(lastModule)) {
+						// There is a conflict, try other alternatives
+						hasFailed = lastModule;
+						continue;
+					}
+					selectedModule = lastModule;
+					hasFailed = false;
+					continue outer; // restart
+				}
+				break;
+			}
+			if (hasFailed) {
+				// There is a not resolve-able conflict with the selectedModule
+				if (compilation) {
+					// TODO print better warning
+					compilation.warnings.push(
+						new Error(
+							`chunk ${
+								chunk.name || chunk.id
+							}\nConflicting order between ${hasFailed.readableIdentifier(
+								compilation.requestShortener
+							)} and ${selectedModule.readableIdentifier(
+								compilation.requestShortener
+							)}`
+						)
+					);
+				}
+				selectedModule = hasFailed;
+			}
+			// Insert the selected module into the final modules list
+			finalModules.push(selectedModule);
+			// Remove the selected module from all lists
+			for (const { list, set } of modulesByChunkGroup) {
+				const lastModule = list[list.length - 1];
+				if (lastModule === selectedModule) list.pop();
+				else if (hasFailed && set.has(selectedModule)) {
+					const idx = list.indexOf(selectedModule);
+					if (idx >= 0) list.splice(idx, 1);
+				}
+			}
+			modulesByChunkGroup.sort(compareModuleLists);
+		}
+		return finalModules;
+	}
+
+	getOrderedChunkCssModules(chunk, chunkGraph, compilation) {
+		return [
+			...this.getModulesInOrder(
+				chunk,
+				chunkGraph.getOrderedChunkModulesIterableBySourceType(
+					chunk,
+					"css-import",
+					compareModulesByIdentifier
+				),
+				compilation
+			),
+			...this.getModulesInOrder(
+				chunk,
+				chunkGraph.getOrderedChunkModulesIterableBySourceType(
+					chunk,
+					"css",
+					compareModulesByIdentifier
+				),
+				compilation
+			)
+		];
+	}
+
+	renderChunk({
+		uniqueName,
+		chunk,
+		chunkGraph,
+		codeGenerationResults,
+		modules
+	}) {
+		const source = new ConcatSource();
+		const metaData = [];
+		for (const module of modules) {
+			try {
+				const codeGenResult = codeGenerationResults.get(module, chunk.runtime);
+
+				const s =
+					codeGenResult.sources.get("css") ||
+					codeGenResult.sources.get("css-import");
+				if (s) {
+					source.add(s);
+					source.add("\n");
+				}
+				const exports =
+					codeGenResult.data && codeGenResult.data.get("css-exports");
+				const moduleId = chunkGraph.getModuleId(module) + "";
+				metaData.push(
+					`${
+						exports
+							? Array.from(exports, ([n, v]) => {
+									const shortcutValue = `${
+										uniqueName ? uniqueName + "-" : ""
+									}${moduleId}-${n}`;
+									return v === shortcutValue
+										? `${escapeCss(n)}/`
+										: v === "--" + shortcutValue
+										? `${escapeCss(n)}%`
+										: `${escapeCss(n)}(${escapeCss(v)})`;
+							  }).join("")
+							: ""
+					}${escapeCss(moduleId)}`
+				);
+			} catch (e) {
+				e.message += `\nduring rendering of css ${module.identifier()}`;
+				throw e;
+			}
+		}
+		source.add(
+			`head{--webpack-${escapeCss(
+				(uniqueName ? uniqueName + "-" : "") + chunk.id,
+				true
+			)}:${metaData.join(",")};}`
+		);
+		return source;
+	}
+
+	static getChunkFilenameTemplate(chunk, outputOptions) {
+		if (chunk.cssFilenameTemplate) {
+			return chunk.cssFilenameTemplate;
+		} else if (chunk.canBeInitial()) {
+			return outputOptions.cssFilename;
+		} else {
+			return outputOptions.cssChunkFilename;
+		}
+	}
+
+	static chunkHasCss(chunk, chunkGraph) {
+		return (
+			!!chunkGraph.getChunkModulesIterableBySourceType(chunk, "css") ||
+			!!chunkGraph.getChunkModulesIterableBySourceType(chunk, "css-import")
+		);
+	}
+}
+
+module.exports = CssModulesPlugin;