react-monaco-editor
Version:
Monaco Editor for React
107 lines (103 loc) • 3.16 kB
JavaScript
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
;
const { RawSource } = require("webpack-sources");
const WebAssemblyImportDependency = require("../dependencies/WebAssemblyImportDependency");
class WasmModuleTemplatePlugin {
apply(moduleTemplate) {
moduleTemplate.hooks.content.tap(
"WasmModuleTemplatePlugin",
(moduleSource, module, { chunk }) => {
if (module.type && module.type.startsWith("webassembly")) {
if (chunk.canBeInitial())
throw new Error(
"Sync WebAssembly compilation is not yet implemented"
);
const generateExports = () => {
if (
Array.isArray(module.buildMeta.providedExports) &&
Array.isArray(module.usedExports)
) {
// generate mangled exports
return module.buildMeta.providedExports
.map(exp => {
const usedName = module.isUsed(exp);
if (usedName) {
return `${module.exportsArgument}[${JSON.stringify(
usedName
)}] = instance.exports[${JSON.stringify(exp)}];`;
} else {
return `// unused ${JSON.stringify(exp)} export`;
}
})
.join("\n");
} else {
// generate simple export
return `${module.moduleArgument}.exports = instance.exports;`;
}
};
const generateImports = () => {
const depsByRequest = new Map();
for (const dep of module.dependencies) {
if (dep instanceof WebAssemblyImportDependency) {
const request = dep.request;
let array = depsByRequest.get(request);
if (!array) {
depsByRequest.set(request, (array = []));
}
const exportName = dep.name;
const usedName = dep.module && dep.module.isUsed(exportName);
array.push({
exportName,
usedName,
module: dep.module
});
}
}
const importsCode = [];
for (const pair of depsByRequest) {
const properties = [];
for (const data of pair[1]) {
properties.push(
`\n\t\t${JSON.stringify(
data.exportName
)}: __webpack_require__(${JSON.stringify(
data.module.id
)})[${JSON.stringify(data.usedName)}]`
);
}
importsCode.push(
`\n\t${JSON.stringify(pair[0])}: {${properties.join(",")}\n\t}`
);
}
return importsCode.join(",");
};
const source = new RawSource(
[
'"use strict";',
"",
"// Instantiate WebAssembly module",
"var instance = new WebAssembly.Instance(__webpack_require__.w[module.i], {" +
generateImports(),
"});",
"",
"// export exports from WebAssembly module",
// TODO rewrite this to getters depending on exports to support circular dependencies
generateExports()
].join("\n")
);
return source;
} else {
return moduleSource;
}
}
);
moduleTemplate.hooks.hash.tap("WasmModuleTemplatePlugin", hash => {
hash.update("WasmModuleTemplatePlugin");
hash.update("1");
});
}
}
module.exports = WasmModuleTemplatePlugin;