dom/base/WindowNamedPropertiesHandler.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_WindowNamedPropertiesHandler_h
   8 #define mozilla_dom_WindowNamedPropertiesHandler_h
   9
  10 #include "mozilla/dom/DOMJSProxyHandler.h"
  11
  12 namespace mozilla {
  13 namespace dom {
  14
  15 class WindowNamedPropertiesHandler : public BaseDOMProxyHandler {
  16  public:
  17   constexpr WindowNamedPropertiesHandler()
  18       : BaseDOMProxyHandler(nullptr, /* hasPrototype = */ true) {}
  19   virtual bool getOwnPropDescriptor(
  20       JSContext* aCx, JS::Handle<JSObject*> aProxy, JS::Handle<jsid> aId,
  21       bool /* unused */,
  22       JS::MutableHandle<Maybe<JS::PropertyDescriptor>> aDesc) const override;
  23   virtual bool defineProperty(JSContext* aCx, JS::Handle<JSObject*> aProxy,
  24                               JS::Handle<jsid> aId,
  25                               JS::Handle<JS::PropertyDescriptor> aDesc,
  26                               JS::ObjectOpResult& result) const override;
  27   virtual bool ownPropNames(
  28       JSContext* aCx, JS::Handle<JSObject*> aProxy, unsigned flags,
  29       JS::MutableHandleVector<jsid> aProps) const override;
  30   virtual bool delete_(JSContext* aCx, JS::Handle<JSObject*> aProxy,
  31                        JS::Handle<jsid> aId,
  32                        JS::ObjectOpResult& aResult) const override;
  33
  34   // No need for getPrototypeIfOrdinary here: window named-properties objects
  35   // have static prototypes, so the version inherited from BaseDOMProxyHandler
  36   // will do the right thing.
  37
  38   virtual bool preventExtensions(JSContext* aCx, JS::Handle<JSObject*> aProxy,
  39                                  JS::ObjectOpResult& aResult) const override {
  40     return aResult.failCantPreventExtensions();
  41   }
  42   virtual bool isExtensible(JSContext* aCx, JS::Handle<JSObject*> aProxy,
  43                             bool* aIsExtensible) const override {
  44     *aIsExtensible = true;
  45     return true;
  46   }
  47   virtual const char* className(JSContext* aCx,
  48                                 JS::Handle<JSObject*> aProxy) const override {
  49     return "WindowProperties";
  50   }
  51
  52   static const WindowNamedPropertiesHandler* getInstance() {
  53     static const WindowNamedPropertiesHandler instance;
  54     return &instance;
  55   }
  56
  57   // For Create, aProto is the parent of the interface prototype object of the
  58   // Window we're associated with.
  59   static JSObject* Create(JSContext* aCx, JS::Handle<JSObject*> aProto);
  60 };
  61
  62 }  // namespace dom
  63 }  // namespace mozilla
  64
  65 #endif /* mozilla_dom_WindowNamedPropertiesHandler_h */