12_location.js

// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
"use strict";

/// <reference path="../../core/internal.d.ts" />

((window) => {
  const { URL } = window.__bootstrap.url;
  const { DOMException } = window.__bootstrap.domException;
  const {
    Error,
    ObjectDefineProperties,
    Symbol,
    SymbolFor,
    SymbolToStringTag,
    TypeError,
    WeakMap,
    WeakMapPrototypeGet,
    WeakMapPrototypeSet,
  } = window.__bootstrap.primordials;

  const locationConstructorKey = Symbol("locationConstuctorKey");

  // The differences between the definitions of `Location` and `WorkerLocation`
  // are because of the `LegacyUnforgeable` attribute only specified upon
  // `Location`'s properties. See:
  // - https://html.spec.whatwg.org/multipage/history.html#the-location-interface
  // - https://heycam.github.io/webidl/#LegacyUnforgeable
  class Location {
    constructor(href = null, key = null) {
      if (key != locationConstructorKey) {
        throw new TypeError("Illegal constructor.");
      }
      const url = new URL(href);
      url.username = "";
      url.password = "";
      ObjectDefineProperties(this, {
        hash: {
          get() {
            return url.hash;
          },
          set() {
            throw new DOMException(
              `Cannot set "location.hash".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        host: {
          get() {
            return url.host;
          },
          set() {
            throw new DOMException(
              `Cannot set "location.host".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        hostname: {
          get() {
            return url.hostname;
          },
          set() {
            throw new DOMException(
              `Cannot set "location.hostname".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        href: {
          get() {
            return url.href;
          },
          set() {
            throw new DOMException(
              `Cannot set "location.href".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        origin: {
          get() {
            return url.origin;
          },
          enumerable: true,
        },
        pathname: {
          get() {
            return url.pathname;
          },
          set() {
            throw new DOMException(
              `Cannot set "location.pathname".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        port: {
          get() {
            return url.port;
          },
          set() {
            throw new DOMException(
              `Cannot set "location.port".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        protocol: {
          get() {
            return url.protocol;
          },
          set() {
            throw new DOMException(
              `Cannot set "location.protocol".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        search: {
          get() {
            return url.search;
          },
          set() {
            throw new DOMException(
              `Cannot set "location.search".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        ancestorOrigins: {
          get() {
            // TODO(nayeemrmn): Replace with a `DOMStringList` instance.
            return {
              length: 0,
              item: () => null,
              contains: () => false,
            };
          },
          enumerable: true,
        },
        assign: {
          value: function assign() {
            throw new DOMException(
              `Cannot call "location.assign()".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        reload: {
          value: function reload() {
            throw new DOMException(
              `Cannot call "location.reload()".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        replace: {
          value: function replace() {
            throw new DOMException(
              `Cannot call "location.replace()".`,
              "NotSupportedError",
            );
          },
          enumerable: true,
        },
        toString: {
          value: function toString() {
            return url.href;
          },
          enumerable: true,
        },
        [SymbolFor("Deno.privateCustomInspect")]: {
          value: function (inspect) {
            const object = {
              hash: this.hash,
              host: this.host,
              hostname: this.hostname,
              href: this.href,
              origin: this.origin,
              pathname: this.pathname,
              port: this.port,
              protocol: this.protocol,
              search: this.search,
            };
            return `${this.constructor.name} ${inspect(object)}`;
          },
        },
      });
    }
  }

  ObjectDefineProperties(Location.prototype, {
    [SymbolToStringTag]: {
      value: "Location",
      configurable: true,
    },
  });

  const workerLocationUrls = new WeakMap();

  class WorkerLocation {
    constructor(href = null, key = null) {
      if (key != locationConstructorKey) {
        throw new TypeError("Illegal constructor.");
      }
      const url = new URL(href);
      url.username = "";
      url.password = "";
      WeakMapPrototypeSet(workerLocationUrls, this, url);
    }
  }

  ObjectDefineProperties(WorkerLocation.prototype, {
    hash: {
      get() {
        const url = WeakMapPrototypeGet(workerLocationUrls, this);
        if (url == null) {
          throw new TypeError("Illegal invocation.");
        }
        return url.hash;
      },
      configurable: true,
      enumerable: true,
    },
    host: {
      get() {
        const url = WeakMapPrototypeGet(workerLocationUrls, this);
        if (url == null) {
          throw new TypeError("Illegal invocation.");
        }
        return url.host;
      },
      configurable: true,
      enumerable: true,
    },
    hostname: {
      get() {
        const url = WeakMapPrototypeGet(workerLocationUrls, this);
        if (url == null) {
          throw new TypeError("Illegal invocation.");
        }
        return url.hostname;
      },
      configurable: true,
      enumerable: true,
    },
    href: {
      get() {
        const url = WeakMapPrototypeGet(workerLocationUrls, this);
        if (url == null) {
          throw new TypeError("Illegal invocation.");
        }
        return url.href;
      },
      configurable: true,
      enumerable: true,
    },
    origin: {
      get() {
        const url = WeakMapPrototypeGet(workerLocationUrls, this);
        if (url == null) {
          throw new TypeError("Illegal invocation.");
        }
        return url.origin;
      },
      configurable: true,
      enumerable: true,
    },
    pathname: {
      get() {
        const url = WeakMapPrototypeGet(workerLocationUrls, this);
        if (url == null) {
          throw new TypeError("Illegal invocation.");
        }
        return url.pathname;
      },
      configurable: true,
      enumerable: true,
    },
    port: {
      get() {
        const url = WeakMapPrototypeGet(workerLocationUrls, this);
        if (url == null) {
          throw new TypeError("Illegal invocation.");
        }
        return url.port;
      },
      configurable: true,
      enumerable: true,
    },
    protocol: {
      get() {
        const url = WeakMapPrototypeGet(workerLocationUrls, this);
        if (url == null) {
          throw new TypeError("Illegal invocation.");
        }
        return url.protocol;
      },
      configurable: true,
      enumerable: true,
    },
    search: {
      get() {
        const url = WeakMapPrototypeGet(workerLocationUrls, this);
        if (url == null) {
          throw new TypeError("Illegal invocation.");
        }
        return url.search;
      },
      configurable: true,
      enumerable: true,
    },
    toString: {
      value: function toString() {
        const url = WeakMapPrototypeGet(workerLocationUrls, this);
        if (url == null) {
          throw new TypeError("Illegal invocation.");
        }
        return url.href;
      },
      configurable: true,
      enumerable: true,
      writable: true,
    },
    [SymbolToStringTag]: {
      value: "WorkerLocation",
      configurable: true,
    },
    [SymbolFor("Deno.privateCustomInspect")]: {
      value: function (inspect) {
        const object = {
          hash: this.hash,
          host: this.host,
          hostname: this.hostname,
          href: this.href,
          origin: this.origin,
          pathname: this.pathname,
          port: this.port,
          protocol: this.protocol,
          search: this.search,
        };
        return `${this.constructor.name} ${inspect(object)}`;
      },
    },
  });

  let location = undefined;
  let workerLocation = undefined;

  function setLocationHref(href) {
    location = new Location(href, locationConstructorKey);
    workerLocation = new WorkerLocation(href, locationConstructorKey);
  }

  window.__bootstrap.location = {
    locationConstructorDescriptor: {
      value: Location,
      configurable: true,
      writable: true,
    },
    workerLocationConstructorDescriptor: {
      value: WorkerLocation,
      configurable: true,
      writable: true,
    },
    locationDescriptor: {
      get() {
        return location;
      },
      set() {
        throw new DOMException(`Cannot set "location".`, "NotSupportedError");
      },
      enumerable: true,
    },
    workerLocationDescriptor: {
      get() {
        if (workerLocation == null) {
          throw new Error(
            `Assertion: "globalThis.location" must be defined in a worker.`,
          );
        }
        return workerLocation;
      },
      configurable: true,
      enumerable: true,
    },
    setLocationHref,
    getLocationHref() {
      return location?.href;
    },
  };
})(this);