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::dom {
  13
  14 class WindowNamedPropertiesHandler : public BaseDOMProxyHandler {
  15  public:
  16   constexpr WindowNamedPropertiesHandler()
  17       : BaseDOMProxyHandler(nullptr, /* hasPrototype = */ true) {}
  18   virtual bool getOwnPropDescriptor(
  19       JSContext* aCx, JS::Handle<JSObject*> aProxy, JS::Handle<jsid> aId,
  20       bool /* unused */,
  21       JS::MutableHandle<Maybe<JS::PropertyDescriptor>> aDesc) const override;
  22   virtual bool defineProperty(JSContext* aCx, JS::Handle<JSObject*> aProxy,
  23                               JS::Handle<jsid> aId,
  24                               JS::Handle<JS::PropertyDescriptor> aDesc,
  25                               JS::ObjectOpResult& result) const override;
  26   virtual bool ownPropNames(
  27       JSContext* aCx, JS::Handle<JSObject*> aProxy, unsigned flags,
  28       JS::MutableHandleVector<jsid> aProps) const override;
  29   virtual bool delete_(JSContext* aCx, JS::Handle<JSObject*> aProxy,
  30                        JS::Handle<jsid> aId,
  31                        JS::ObjectOpResult& aResult) const override;
  32
  33   // No need for getPrototypeIfOrdinary here: window named-properties objects
  34   // have static prototypes, so the version inherited from BaseDOMProxyHandler
  35   // will do the right thing.
  36
  37   virtual bool preventExtensions(JSContext* aCx, JS::Handle<JSObject*> aProxy,
  38                                  JS::ObjectOpResult& aResult) const override {
  39     return aResult.failCantPreventExtensions();
  40   }
  41   virtual bool isExtensible(JSContext* aCx, JS::Handle<JSObject*> aProxy,
  42                             bool* aIsExtensible) const override {
  43     *aIsExtensible = true;
  44     return true;
  45   }
  46   virtual const char* className(JSContext* aCx,
  47                                 JS::Handle<JSObject*> aProxy) const override {
  48     return "WindowProperties";
  49   }
  50
  51   static const WindowNamedPropertiesHandler* getInstance() {
  52     static const WindowNamedPropertiesHandler instance;
  53     return &instance;
  54   }
  55
  56   // For Create, aProto is the parent of the interface prototype object of the
  57   // Window we're associated with.
  58   static JSObject* Create(JSContext* aCx, JS::Handle<JSObject*> aProto);
  59 };
  60
  61 }  // namespace mozilla::dom
  62
  63 #endif /* mozilla_dom_WindowNamedPropertiesHandler_h */