149 lines
4.7 KiB
JavaScript
149 lines
4.7 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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/** @typedef {import("webpack-sources").Source} Source */
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/** @typedef {import("./ChunkGraph")} ChunkGraph */
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/** @typedef {import("./CodeGenerationResults")} CodeGenerationResults */
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/** @typedef {import("./Compilation")} Compilation */
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/** @typedef {import("./ConcatenationScope")} ConcatenationScope */
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/** @typedef {import("./DependencyTemplate")} DependencyTemplate */
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/** @typedef {import("./DependencyTemplates")} DependencyTemplates */
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/** @typedef {import("./Module").ConcatenationBailoutReasonContext} ConcatenationBailoutReasonContext */
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/** @typedef {import("./ModuleGraph")} ModuleGraph */
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/** @typedef {import("./NormalModule")} NormalModule */
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/** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */
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/** @typedef {import("./util/Hash")} Hash */
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/** @typedef {import("./util/runtime").RuntimeSpec} RuntimeSpec */
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/**
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* @typedef {Object} GenerateContext
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* @property {DependencyTemplates} dependencyTemplates mapping from dependencies to templates
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* @property {RuntimeTemplate} runtimeTemplate the runtime template
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* @property {ModuleGraph} moduleGraph the module graph
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* @property {ChunkGraph} chunkGraph the chunk graph
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* @property {Set<string>} runtimeRequirements the requirements for runtime
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* @property {RuntimeSpec} runtime the runtime
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* @property {ConcatenationScope=} concatenationScope when in concatenated module, information about other concatenated modules
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* @property {CodeGenerationResults=} codeGenerationResults code generation results of other modules (need to have a codeGenerationDependency to use that)
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* @property {string} type which kind of code should be generated
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* @property {function(): Map<string, any>=} getData get access to the code generation data
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*/
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/**
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* @typedef {Object} UpdateHashContext
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* @property {NormalModule} module the module
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* @property {ChunkGraph} chunkGraph
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* @property {RuntimeSpec} runtime
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*/
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/**
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*
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*/
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class Generator {
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static byType(map) {
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return new ByTypeGenerator(map);
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}
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/* istanbul ignore next */
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/**
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* @abstract
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* @param {NormalModule} module fresh module
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* @returns {Set<string>} available types (do not mutate)
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*/
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getTypes(module) {
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const AbstractMethodError = require("./AbstractMethodError");
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throw new AbstractMethodError();
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}
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/* istanbul ignore next */
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/**
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* @abstract
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* @param {NormalModule} module the module
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* @param {string=} type source type
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* @returns {number} estimate size of the module
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*/
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getSize(module, type) {
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const AbstractMethodError = require("./AbstractMethodError");
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throw new AbstractMethodError();
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}
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/* istanbul ignore next */
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/**
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* @abstract
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* @param {NormalModule} module module for which the code should be generated
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* @param {GenerateContext} generateContext context for generate
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* @returns {Source} generated code
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*/
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generate(
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module,
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{ dependencyTemplates, runtimeTemplate, moduleGraph, type }
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) {
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const AbstractMethodError = require("./AbstractMethodError");
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throw new AbstractMethodError();
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}
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/**
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* @param {NormalModule} module module for which the bailout reason should be determined
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* @param {ConcatenationBailoutReasonContext} context context
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* @returns {string | undefined} reason why this module can't be concatenated, undefined when it can be concatenated
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*/
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getConcatenationBailoutReason(module, context) {
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return `Module Concatenation is not implemented for ${this.constructor.name}`;
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}
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/**
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* @param {Hash} hash hash that will be modified
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* @param {UpdateHashContext} updateHashContext context for updating hash
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*/
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updateHash(hash, { module, runtime }) {
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// no nothing
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}
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}
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class ByTypeGenerator extends Generator {
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constructor(map) {
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super();
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this.map = map;
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this._types = new Set(Object.keys(map));
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}
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/**
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* @param {NormalModule} module fresh module
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* @returns {Set<string>} available types (do not mutate)
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*/
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getTypes(module) {
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return this._types;
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}
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/**
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* @param {NormalModule} module the module
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* @param {string=} type source type
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* @returns {number} estimate size of the module
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*/
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getSize(module, type) {
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const t = type || "javascript";
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const generator = this.map[t];
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return generator ? generator.getSize(module, t) : 0;
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}
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/**
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* @param {NormalModule} module module for which the code should be generated
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* @param {GenerateContext} generateContext context for generate
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* @returns {Source} generated code
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*/
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generate(module, generateContext) {
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const type = generateContext.type;
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const generator = this.map[type];
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if (!generator) {
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throw new Error(`Generator.byType: no generator specified for ${type}`);
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}
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return generator.generate(module, generateContext);
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}
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}
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module.exports = Generator;
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