mirror of
https://github.com/denoland/deno
synced 2024-09-17 23:22:46 +00:00
fc4819e1e0
Refactors Event and EventTarget so that they better encapsulate their non-public data as well as are more forward compatible with things like DOM Nodes. Moves `dom_types.ts` -> `dom_types.d.ts` which was always the intention, it was a legacy of when we used to build the types from the code and the limitations of the compiler. There was a lot of cruft in `dom_types` which shouldn't have been there, and mis-alignment to the DOM standards. This generally has been eliminated, though we still have some minor differences from the DOM (like the removal of some deprecated methods/properties). Adds `DOMException`. Strictly it shouldn't inherit from `Error`, but most browsers provide a stack trace when one is thrown, so the behaviour in Deno actually better matches the browser. `Event` still doesn't log to console like it does in the browser. I wanted to get this raised and that could be an enhancement later on (it currently doesn't either).
123 lines
3.8 KiB
TypeScript
123 lines
3.8 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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// This module is the entry point for "main" isolate, ie. the one
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// that is created when you run "deno" executable.
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//
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// It provides a single function that should be called by Rust:
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// - `bootstrapMainRuntime` - must be called once, when Isolate is created.
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// It sets up runtime by providing globals for `WindowScope` and adds `Deno` global.
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import * as Deno from "./deno.ts";
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import * as csprng from "./ops/get_random_values.ts";
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import { exit } from "./ops/os.ts";
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import {
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readOnly,
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getterOnly,
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writable,
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windowOrWorkerGlobalScopeMethods,
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windowOrWorkerGlobalScopeProperties,
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eventTargetProperties,
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setEventTargetData,
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} from "./globals.ts";
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import { internalObject } from "./internals.ts";
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import { setSignals } from "./signals.ts";
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import { replLoop } from "./repl.ts";
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import { LocationImpl } from "./web/location.ts";
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import { setTimeout } from "./web/timers.ts";
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import * as runtime from "./runtime.ts";
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import { symbols } from "./symbols.ts";
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import { log, immutableDefine } from "./util.ts";
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// TODO: factor out `Deno` global assignment to separate function
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// Add internal object to Deno object.
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// This is not exposed as part of the Deno types.
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// @ts-ignore
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Deno[symbols.internal] = internalObject;
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let windowIsClosing = false;
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function windowClose(): void {
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if (!windowIsClosing) {
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windowIsClosing = true;
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// Push a macrotask to exit after a promise resolve.
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// This is not perfect, but should be fine for first pass.
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Promise.resolve().then(() =>
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setTimeout.call(
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null,
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() => {
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// This should be fine, since only Window/MainWorker has .close()
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exit(0);
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},
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0
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)
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);
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}
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}
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export const mainRuntimeGlobalProperties = {
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window: readOnly(globalThis),
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self: readOnly(globalThis),
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crypto: readOnly(csprng),
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// TODO(bartlomieju): from MDN docs (https://developer.mozilla.org/en-US/docs/Web/API/WorkerGlobalScope)
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// it seems those two properties should be available to workers as well
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onload: writable(null),
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onunload: writable(null),
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close: writable(windowClose),
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closed: getterOnly(() => windowIsClosing),
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};
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let hasBootstrapped = false;
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export function bootstrapMainRuntime(): void {
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if (hasBootstrapped) {
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throw new Error("Worker runtime already bootstrapped");
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}
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log("bootstrapMainRuntime");
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hasBootstrapped = true;
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Object.defineProperties(globalThis, windowOrWorkerGlobalScopeMethods);
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Object.defineProperties(globalThis, windowOrWorkerGlobalScopeProperties);
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Object.defineProperties(globalThis, eventTargetProperties);
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Object.defineProperties(globalThis, mainRuntimeGlobalProperties);
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setEventTargetData(globalThis);
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// Registers the handler for window.onload function.
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globalThis.addEventListener("load", (e) => {
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const { onload } = globalThis;
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if (typeof onload === "function") {
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onload(e);
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}
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});
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// Registers the handler for window.onunload function.
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globalThis.addEventListener("unload", (e) => {
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const { onunload } = globalThis;
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if (typeof onunload === "function") {
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onunload(e);
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}
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});
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const s = runtime.start();
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const location = new LocationImpl(s.location);
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immutableDefine(globalThis, "location", location);
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Object.freeze(globalThis.location);
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Object.defineProperties(Deno, {
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pid: readOnly(s.pid),
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noColor: readOnly(s.noColor),
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args: readOnly(Object.freeze(s.args)),
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});
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// Setup `Deno` global - we're actually overriding already
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// existing global `Deno` with `Deno` namespace from "./deno.ts".
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immutableDefine(globalThis, "Deno", Deno);
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Object.freeze(globalThis.Deno);
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Object.freeze(globalThis.Deno.core);
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Object.freeze(globalThis.Deno.core.sharedQueue);
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setSignals();
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log("cwd", s.cwd);
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log("args", Deno.args);
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if (s.repl) {
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replLoop();
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}
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}
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