diff options
Diffstat (limited to 'node_modules/webpack/lib/wasm-async/AsyncWebAssemblyJavascriptGenerator.js')
| -rw-r--r-- | node_modules/webpack/lib/wasm-async/AsyncWebAssemblyJavascriptGenerator.js | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/wasm-async/AsyncWebAssemblyJavascriptGenerator.js b/node_modules/webpack/lib/wasm-async/AsyncWebAssemblyJavascriptGenerator.js new file mode 100644 index 00000000..f3f908f0 --- /dev/null +++ b/node_modules/webpack/lib/wasm-async/AsyncWebAssemblyJavascriptGenerator.js @@ -0,0 +1,206 @@ +/* + MIT License http://www.opensource.org/licenses/mit-license.php + Author Tobias Koppers @sokra +*/ + +"use strict"; + +const { RawSource } = require("webpack-sources"); +const Generator = require("../Generator"); +const InitFragment = require("../InitFragment"); +const RuntimeGlobals = require("../RuntimeGlobals"); +const Template = require("../Template"); +const WebAssemblyImportDependency = require("../dependencies/WebAssemblyImportDependency"); + +/** @typedef {import("webpack-sources").Source} Source */ +/** @typedef {import("../../declarations/WebpackOptions").OutputNormalized} OutputOptions */ +/** @typedef {import("../DependencyTemplates")} DependencyTemplates */ +/** @typedef {import("../Generator").GenerateContext} GenerateContext */ +/** @typedef {import("../Module")} Module */ +/** @typedef {import("../NormalModule")} NormalModule */ +/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */ + +const TYPES = new Set(["webassembly"]); + +/** + * @typedef {{ request: string, importVar: string }} ImportObjRequestItem + */ + +class AsyncWebAssemblyJavascriptGenerator extends Generator { + /** + * @param {OutputOptions["webassemblyModuleFilename"]} filenameTemplate template for the WebAssembly module filename + */ + constructor(filenameTemplate) { + super(); + this.filenameTemplate = filenameTemplate; + } + + /** + * @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) { + return 40 + module.dependencies.length * 10; + } + + /** + * @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 { + runtimeTemplate, + chunkGraph, + moduleGraph, + runtimeRequirements, + runtime + } = generateContext; + runtimeRequirements.add(RuntimeGlobals.module); + runtimeRequirements.add(RuntimeGlobals.moduleId); + runtimeRequirements.add(RuntimeGlobals.exports); + runtimeRequirements.add(RuntimeGlobals.instantiateWasm); + /** @type {InitFragment<InitFragment<string>>[]} */ + const initFragments = []; + /** @type {Map<Module, ImportObjRequestItem>} */ + const depModules = new Map(); + /** @type {Map<string, WebAssemblyImportDependency[]>} */ + const wasmDepsByRequest = new Map(); + for (const dep of module.dependencies) { + if (dep instanceof WebAssemblyImportDependency) { + const module = /** @type {Module} */ (moduleGraph.getModule(dep)); + if (!depModules.has(module)) { + depModules.set(module, { + request: dep.request, + importVar: `WEBPACK_IMPORTED_MODULE_${depModules.size}` + }); + } + let list = wasmDepsByRequest.get(dep.request); + if (list === undefined) { + list = []; + wasmDepsByRequest.set(dep.request, list); + } + list.push(dep); + } + } + + /** @type {Array<string>} */ + const promises = []; + + const importStatements = Array.from( + depModules, + ([importedModule, { request, importVar }]) => { + if (moduleGraph.isAsync(importedModule)) { + promises.push(importVar); + } + return runtimeTemplate.importStatement({ + update: false, + module: importedModule, + chunkGraph, + request, + originModule: module, + importVar, + runtimeRequirements + }); + } + ); + const importsCode = importStatements.map(([x]) => x).join(""); + const importsCompatCode = importStatements.map(([_, x]) => x).join(""); + + const importObjRequestItems = Array.from( + wasmDepsByRequest, + ([request, deps]) => { + const exportItems = deps.map(dep => { + const importedModule = + /** @type {Module} */ + (moduleGraph.getModule(dep)); + const importVar = + /** @type {ImportObjRequestItem} */ + (depModules.get(importedModule)).importVar; + return `${JSON.stringify( + dep.name + )}: ${runtimeTemplate.exportFromImport({ + moduleGraph, + module: importedModule, + request, + exportName: dep.name, + originModule: module, + asiSafe: true, + isCall: false, + callContext: false, + defaultInterop: true, + importVar, + initFragments, + runtime, + runtimeRequirements + })}`; + }); + return Template.asString([ + `${JSON.stringify(request)}: {`, + Template.indent(exportItems.join(",\n")), + "}" + ]); + } + ); + + const importsObj = + importObjRequestItems.length > 0 + ? Template.asString([ + "{", + Template.indent(importObjRequestItems.join(",\n")), + "}" + ]) + : undefined; + + const instantiateCall = `${RuntimeGlobals.instantiateWasm}(${module.exportsArgument}, ${ + module.moduleArgument + }.id, ${JSON.stringify( + chunkGraph.getRenderedModuleHash(module, runtime) + )}${importsObj ? `, ${importsObj})` : ")"}`; + + if (promises.length > 0) + runtimeRequirements.add(RuntimeGlobals.asyncModule); + + const source = new RawSource( + promises.length > 0 + ? Template.asString([ + `var __webpack_instantiate__ = ${runtimeTemplate.basicFunction( + `[${promises.join(", ")}]`, + `${importsCompatCode}return ${instantiateCall};` + )}`, + `${RuntimeGlobals.asyncModule}(${ + module.moduleArgument + }, async ${runtimeTemplate.basicFunction( + "__webpack_handle_async_dependencies__, __webpack_async_result__", + [ + "try {", + importsCode, + `var __webpack_async_dependencies__ = __webpack_handle_async_dependencies__([${promises.join( + ", " + )}]);`, + `var [${promises.join( + ", " + )}] = __webpack_async_dependencies__.then ? (await __webpack_async_dependencies__)() : __webpack_async_dependencies__;`, + `${importsCompatCode}await ${instantiateCall};`, + "__webpack_async_result__();", + "} catch(e) { __webpack_async_result__(e); }" + ] + )}, 1);` + ]) + : `${importsCode}${importsCompatCode}module.exports = ${instantiateCall};` + ); + + return InitFragment.addToSource(source, initFragments, generateContext); + } +} + +module.exports = AsyncWebAssemblyJavascriptGenerator; |