First commit

node_modules/whatwg-url/lib/utils.js

@@ -0,0 +1,190 @@
+"use strict";
+
+// Returns "Type(value) is Object" in ES terminology.
+function isObject(value) {
+  return (typeof value === "object" && value !== null) || typeof value === "function";
+}
+
+const hasOwn = Function.prototype.call.bind(Object.prototype.hasOwnProperty);
+
+// Like `Object.assign`, but using `[[GetOwnProperty]]` and `[[DefineOwnProperty]]`
+// instead of `[[Get]]` and `[[Set]]` and only allowing objects
+function define(target, source) {
+  for (const key of Reflect.ownKeys(source)) {
+    const descriptor = Reflect.getOwnPropertyDescriptor(source, key);
+    if (descriptor && !Reflect.defineProperty(target, key, descriptor)) {
+      throw new TypeError(`Cannot redefine property: ${String(key)}`);
+    }
+  }
+}
+
+function newObjectInRealm(globalObject, object) {
+  const ctorRegistry = initCtorRegistry(globalObject);
+  return Object.defineProperties(
+    Object.create(ctorRegistry["%Object.prototype%"]),
+    Object.getOwnPropertyDescriptors(object)
+  );
+}
+
+const wrapperSymbol = Symbol("wrapper");
+const implSymbol = Symbol("impl");
+const sameObjectCaches = Symbol("SameObject caches");
+const ctorRegistrySymbol = Symbol.for("[webidl2js] constructor registry");
+
+const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(async function* () {}).prototype);
+
+function initCtorRegistry(globalObject) {
+  if (hasOwn(globalObject, ctorRegistrySymbol)) {
+    return globalObject[ctorRegistrySymbol];
+  }
+
+  const ctorRegistry = Object.create(null);
+
+  // In addition to registering all the WebIDL2JS-generated types in the constructor registry,
+  // we also register a few intrinsics that we make use of in generated code, since they are not
+  // easy to grab from the globalObject variable.
+  ctorRegistry["%Object.prototype%"] = globalObject.Object.prototype;
+  ctorRegistry["%IteratorPrototype%"] = Object.getPrototypeOf(
+    Object.getPrototypeOf(new globalObject.Array()[Symbol.iterator]())
+  );
+
+  try {
+    ctorRegistry["%AsyncIteratorPrototype%"] = Object.getPrototypeOf(
+      Object.getPrototypeOf(
+        globalObject.eval("(async function* () {})").prototype
+      )
+    );
+  } catch {
+    ctorRegistry["%AsyncIteratorPrototype%"] = AsyncIteratorPrototype;
+  }
+
+  globalObject[ctorRegistrySymbol] = ctorRegistry;
+  return ctorRegistry;
+}
+
+function getSameObject(wrapper, prop, creator) {
+  if (!wrapper[sameObjectCaches]) {
+    wrapper[sameObjectCaches] = Object.create(null);
+  }
+
+  if (prop in wrapper[sameObjectCaches]) {
+    return wrapper[sameObjectCaches][prop];
+  }
+
+  wrapper[sameObjectCaches][prop] = creator();
+  return wrapper[sameObjectCaches][prop];
+}
+
+function wrapperForImpl(impl) {
+  return impl ? impl[wrapperSymbol] : null;
+}
+
+function implForWrapper(wrapper) {
+  return wrapper ? wrapper[implSymbol] : null;
+}
+
+function tryWrapperForImpl(impl) {
+  const wrapper = wrapperForImpl(impl);
+  return wrapper ? wrapper : impl;
+}
+
+function tryImplForWrapper(wrapper) {
+  const impl = implForWrapper(wrapper);
+  return impl ? impl : wrapper;
+}
+
+const iterInternalSymbol = Symbol("internal");
+
+function isArrayIndexPropName(P) {
+  if (typeof P !== "string") {
+    return false;
+  }
+  const i = P >>> 0;
+  if (i === 2 ** 32 - 1) {
+    return false;
+  }
+  const s = `${i}`;
+  if (P !== s) {
+    return false;
+  }
+  return true;
+}
+
+const byteLengthGetter =
+    Object.getOwnPropertyDescriptor(ArrayBuffer.prototype, "byteLength").get;
+function isArrayBuffer(value) {
+  try {
+    byteLengthGetter.call(value);
+    return true;
+  } catch (e) {
+    return false;
+  }
+}
+
+function iteratorResult([key, value], kind) {
+  let result;
+  switch (kind) {
+    case "key":
+      result = key;
+      break;
+    case "value":
+      result = value;
+      break;
+    case "key+value":
+      result = [key, value];
+      break;
+  }
+  return { value: result, done: false };
+}
+
+const supportsPropertyIndex = Symbol("supports property index");
+const supportedPropertyIndices = Symbol("supported property indices");
+const supportsPropertyName = Symbol("supports property name");
+const supportedPropertyNames = Symbol("supported property names");
+const indexedGet = Symbol("indexed property get");
+const indexedSetNew = Symbol("indexed property set new");
+const indexedSetExisting = Symbol("indexed property set existing");
+const namedGet = Symbol("named property get");
+const namedSetNew = Symbol("named property set new");
+const namedSetExisting = Symbol("named property set existing");
+const namedDelete = Symbol("named property delete");
+
+const asyncIteratorNext = Symbol("async iterator get the next iteration result");
+const asyncIteratorReturn = Symbol("async iterator return steps");
+const asyncIteratorInit = Symbol("async iterator initialization steps");
+const asyncIteratorEOI = Symbol("async iterator end of iteration");
+
+module.exports = exports = {
+  isObject,
+  hasOwn,
+  define,
+  newObjectInRealm,
+  wrapperSymbol,
+  implSymbol,
+  getSameObject,
+  ctorRegistrySymbol,
+  initCtorRegistry,
+  wrapperForImpl,
+  implForWrapper,
+  tryWrapperForImpl,
+  tryImplForWrapper,
+  iterInternalSymbol,
+  isArrayBuffer,
+  isArrayIndexPropName,
+  supportsPropertyIndex,
+  supportedPropertyIndices,
+  supportsPropertyName,
+  supportedPropertyNames,
+  indexedGet,
+  indexedSetNew,
+  indexedSetExisting,
+  namedGet,
+  namedSetNew,
+  namedSetExisting,
+  namedDelete,
+  asyncIteratorNext,
+  asyncIteratorReturn,
+  asyncIteratorInit,
+  asyncIteratorEOI,
+  iteratorResult
+};