source: imaps-frontend/node_modules/webpack/lib/wasm-sync/WebAssemblyJavascriptGenerator.js

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Last change on this file was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 4 days ago

F4 Finalna Verzija
  • Property mode set to 100644
File size: 6.7 KB
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1/*
2 MIT License http://www.opensource.org/licenses/mit-license.php
3 Author Tobias Koppers @sokra
4*/
5
6"use strict";
7
8const { RawSource } = require("webpack-sources");
9const { UsageState } = require("../ExportsInfo");
10const Generator = require("../Generator");
11const InitFragment = require("../InitFragment");
12const { WEBASSEMBLY_TYPES } = require("../ModuleSourceTypesConstants");
13const RuntimeGlobals = require("../RuntimeGlobals");
14const Template = require("../Template");
15const ModuleDependency = require("../dependencies/ModuleDependency");
16const WebAssemblyExportImportedDependency = require("../dependencies/WebAssemblyExportImportedDependency");
17const WebAssemblyImportDependency = require("../dependencies/WebAssemblyImportDependency");
18
19/** @typedef {import("webpack-sources").Source} Source */
20/** @typedef {import("../Dependency")} Dependency */
21/** @typedef {import("../DependencyTemplates")} DependencyTemplates */
22/** @typedef {import("../Generator").GenerateContext} GenerateContext */
23/** @typedef {import("../Module")} Module */
24/** @typedef {import("../Module").SourceTypes} SourceTypes */
25/** @typedef {import("../NormalModule")} NormalModule */
26/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
27
28class WebAssemblyJavascriptGenerator extends Generator {
29 /**
30 * @param {NormalModule} module fresh module
31 * @returns {SourceTypes} available types (do not mutate)
32 */
33 getTypes(module) {
34 return WEBASSEMBLY_TYPES;
35 }
36
37 /**
38 * @param {NormalModule} module the module
39 * @param {string=} type source type
40 * @returns {number} estimate size of the module
41 */
42 getSize(module, type) {
43 return 95 + module.dependencies.length * 5;
44 }
45
46 /**
47 * @param {NormalModule} module module for which the code should be generated
48 * @param {GenerateContext} generateContext context for generate
49 * @returns {Source | null} generated code
50 */
51 generate(module, generateContext) {
52 const {
53 runtimeTemplate,
54 moduleGraph,
55 chunkGraph,
56 runtimeRequirements,
57 runtime
58 } = generateContext;
59 /** @type {InitFragment<InitFragment<string>>[]} */
60 const initFragments = [];
61
62 const exportsInfo = moduleGraph.getExportsInfo(module);
63
64 let needExportsCopy = false;
65 const importedModules = new Map();
66 const initParams = [];
67 let index = 0;
68 for (const dep of module.dependencies) {
69 const moduleDep =
70 dep && dep instanceof ModuleDependency ? dep : undefined;
71 if (moduleGraph.getModule(dep)) {
72 let importData = importedModules.get(moduleGraph.getModule(dep));
73 if (importData === undefined) {
74 importedModules.set(
75 moduleGraph.getModule(dep),
76 (importData = {
77 importVar: `m${index}`,
78 index,
79 request: (moduleDep && moduleDep.userRequest) || undefined,
80 names: new Set(),
81 reexports: []
82 })
83 );
84 index++;
85 }
86 if (dep instanceof WebAssemblyImportDependency) {
87 importData.names.add(dep.name);
88 if (dep.description.type === "GlobalType") {
89 const exportName = dep.name;
90 const importedModule = moduleGraph.getModule(dep);
91
92 if (importedModule) {
93 const usedName = moduleGraph
94 .getExportsInfo(importedModule)
95 .getUsedName(exportName, runtime);
96 if (usedName) {
97 initParams.push(
98 runtimeTemplate.exportFromImport({
99 moduleGraph,
100 module: importedModule,
101 request: dep.request,
102 importVar: importData.importVar,
103 originModule: module,
104 exportName: dep.name,
105 asiSafe: true,
106 isCall: false,
107 callContext: null,
108 defaultInterop: true,
109 initFragments,
110 runtime,
111 runtimeRequirements
112 })
113 );
114 }
115 }
116 }
117 }
118 if (dep instanceof WebAssemblyExportImportedDependency) {
119 importData.names.add(dep.name);
120 const usedName = moduleGraph
121 .getExportsInfo(module)
122 .getUsedName(dep.exportName, runtime);
123 if (usedName) {
124 runtimeRequirements.add(RuntimeGlobals.exports);
125 const exportProp = `${module.exportsArgument}[${JSON.stringify(
126 usedName
127 )}]`;
128 const defineStatement = Template.asString([
129 `${exportProp} = ${runtimeTemplate.exportFromImport({
130 moduleGraph,
131 module: /** @type {Module} */ (moduleGraph.getModule(dep)),
132 request: dep.request,
133 importVar: importData.importVar,
134 originModule: module,
135 exportName: dep.name,
136 asiSafe: true,
137 isCall: false,
138 callContext: null,
139 defaultInterop: true,
140 initFragments,
141 runtime,
142 runtimeRequirements
143 })};`,
144 `if(WebAssembly.Global) ${exportProp} = ` +
145 `new WebAssembly.Global({ value: ${JSON.stringify(
146 dep.valueType
147 )} }, ${exportProp});`
148 ]);
149 importData.reexports.push(defineStatement);
150 needExportsCopy = true;
151 }
152 }
153 }
154 }
155 const importsCode = Template.asString(
156 Array.from(
157 importedModules,
158 ([module, { importVar, request, reexports }]) => {
159 const importStatement = runtimeTemplate.importStatement({
160 module,
161 chunkGraph,
162 request,
163 importVar,
164 originModule: module,
165 runtimeRequirements
166 });
167 return importStatement[0] + importStatement[1] + reexports.join("\n");
168 }
169 )
170 );
171
172 const copyAllExports =
173 exportsInfo.otherExportsInfo.getUsed(runtime) === UsageState.Unused &&
174 !needExportsCopy;
175
176 // need these globals
177 runtimeRequirements.add(RuntimeGlobals.module);
178 runtimeRequirements.add(RuntimeGlobals.moduleId);
179 runtimeRequirements.add(RuntimeGlobals.wasmInstances);
180 if (exportsInfo.otherExportsInfo.getUsed(runtime) !== UsageState.Unused) {
181 runtimeRequirements.add(RuntimeGlobals.makeNamespaceObject);
182 runtimeRequirements.add(RuntimeGlobals.exports);
183 }
184 if (!copyAllExports) {
185 runtimeRequirements.add(RuntimeGlobals.exports);
186 }
187
188 // create source
189 const source = new RawSource(
190 [
191 '"use strict";',
192 "// Instantiate WebAssembly module",
193 `var wasmExports = ${RuntimeGlobals.wasmInstances}[${module.moduleArgument}.id];`,
194
195 exportsInfo.otherExportsInfo.getUsed(runtime) !== UsageState.Unused
196 ? `${RuntimeGlobals.makeNamespaceObject}(${module.exportsArgument});`
197 : "",
198
199 // this must be before import for circular dependencies
200 "// export exports from WebAssembly module",
201 copyAllExports
202 ? `${module.moduleArgument}.exports = wasmExports;`
203 : "for(var name in wasmExports) " +
204 "if(name) " +
205 `${module.exportsArgument}[name] = wasmExports[name];`,
206 "// exec imports from WebAssembly module (for esm order)",
207 importsCode,
208 "",
209 "// exec wasm module",
210 `wasmExports[""](${initParams.join(", ")})`
211 ].join("\n")
212 );
213 return InitFragment.addToSource(source, initFragments, generateContext);
214 }
215}
216
217module.exports = WebAssemblyJavascriptGenerator;
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