147 lines
4.1 KiB
JavaScript
Executable file
147 lines
4.1 KiB
JavaScript
Executable file
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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*/
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"use strict";
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const RuntimeGlobals = require("../RuntimeGlobals");
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const Template = require("../Template");
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const HelperRuntimeModule = require("./HelperRuntimeModule");
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class AsyncModuleRuntimeModule extends HelperRuntimeModule {
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constructor() {
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super("async module");
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}
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/**
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* @returns {string} runtime code
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*/
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generate() {
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const { runtimeTemplate } = this.compilation;
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const fn = RuntimeGlobals.asyncModule;
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return Template.asString([
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'var webpackThen = typeof Symbol === "function" ? Symbol("webpack then") : "__webpack_then__";',
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'var webpackExports = typeof Symbol === "function" ? Symbol("webpack exports") : "__webpack_exports__";',
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`var completeQueue = ${runtimeTemplate.basicFunction("queue", [
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"if(queue) {",
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Template.indent([
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`queue.forEach(${runtimeTemplate.expressionFunction(
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"fn.r--",
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"fn"
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)});`,
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`queue.forEach(${runtimeTemplate.expressionFunction(
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"fn.r-- ? fn.r++ : fn()",
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"fn"
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)});`
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]),
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"}"
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])}`,
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`var completeFunction = ${runtimeTemplate.expressionFunction(
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"!--fn.r && fn()",
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"fn"
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)};`,
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`var queueFunction = ${runtimeTemplate.expressionFunction(
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"queue ? queue.push(fn) : completeFunction(fn)",
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"queue, fn"
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)};`,
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`var wrapDeps = ${runtimeTemplate.returningFunction(
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`deps.map(${runtimeTemplate.basicFunction("dep", [
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'if(dep !== null && typeof dep === "object") {',
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Template.indent([
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"if(dep[webpackThen]) return dep;",
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"if(dep.then) {",
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Template.indent([
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"var queue = [];",
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`dep.then(${runtimeTemplate.basicFunction("r", [
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"obj[webpackExports] = r;",
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"completeQueue(queue);",
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"queue = 0;"
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])});`,
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`var obj = {};
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obj[webpackThen] = ${runtimeTemplate.expressionFunction(
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"queueFunction(queue, fn), dep.catch(reject)",
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"fn, reject"
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)};`,
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"return obj;"
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]),
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"}"
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]),
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"}",
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`var ret = {};
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ret[webpackThen] = ${runtimeTemplate.expressionFunction(
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"completeFunction(fn)",
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"fn"
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)};
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ret[webpackExports] = dep;
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return ret;`
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])})`,
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"deps"
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)};`,
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`${fn} = ${runtimeTemplate.basicFunction("module, body, hasAwait", [
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"var queue = hasAwait && [];",
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"var exports = module.exports;",
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"var currentDeps;",
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"var outerResolve;",
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"var reject;",
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"var isEvaluating = true;",
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"var nested = false;",
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`var whenAll = ${runtimeTemplate.basicFunction(
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"deps, onResolve, onReject",
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[
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"if (nested) return;",
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"nested = true;",
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"onResolve.r += deps.length;",
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`deps.map(${runtimeTemplate.expressionFunction(
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"dep[webpackThen](onResolve, onReject)",
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"dep, i"
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)});`,
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"nested = false;"
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]
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)};`,
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`var promise = new Promise(${runtimeTemplate.basicFunction(
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"resolve, rej",
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[
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"reject = rej;",
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`outerResolve = ${runtimeTemplate.expressionFunction(
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"resolve(exports), completeQueue(queue), queue = 0"
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)};`
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]
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)});`,
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"promise[webpackExports] = exports;",
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`promise[webpackThen] = ${runtimeTemplate.basicFunction(
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"fn, rejectFn",
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[
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"if (isEvaluating) { return completeFunction(fn); }",
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"if (currentDeps) whenAll(currentDeps, fn, rejectFn);",
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"queueFunction(queue, fn);",
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"promise.catch(rejectFn);"
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]
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)};`,
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"module.exports = promise;",
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`body(${runtimeTemplate.basicFunction("deps", [
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"if(!deps) return outerResolve();",
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"currentDeps = wrapDeps(deps);",
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"var fn, result;",
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`var promise = new Promise(${runtimeTemplate.basicFunction(
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"resolve, reject",
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[
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`fn = ${runtimeTemplate.expressionFunction(
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`resolve(result = currentDeps.map(${runtimeTemplate.returningFunction(
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"d[webpackExports]",
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"d"
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)}))`
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)};`,
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"fn.r = 0;",
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"whenAll(currentDeps, fn, reject);"
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]
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)});`,
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"return fn.r ? promise : result;"
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])}).then(outerResolve, reject);`,
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"isEvaluating = false;"
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])};`
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]);
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}
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}
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module.exports = AsyncModuleRuntimeModule;
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