dom/base/nsDOMScriptObjectFactory.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=2 sw=2 et tw=78:
   3  *
   4  * This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   7  *
   8  *
   9  * This Original Code has been modified by IBM Corporation.
  10  * Modifications made by IBM described herein are
  11  * Copyright (c) International Business Machines
  12  * Corporation, 2000
  13  *
  14  * Modifications to Mozilla code or documentation
  15  * identified per MPL Section 3.3
  16  *
  17  * Date         Modified by     Description of modification
  18  * 03/27/2000   IBM Corp.       Added PR_CALLBACK for Optlink
  19  *                               use in OS2
  20  */
  21
  22 #include "nsDOMScriptObjectFactory.h"
  23 #include "nsScriptNameSpaceManager.h"
  24 #include "nsIObserverService.h"
  25 #include "nsJSEnvironment.h"
  26 #include "nsGlobalWindow.h"
  27 #include "nsCRT.h"
  28 #ifdef MOZ_XUL
  29 #include "nsXULPrototypeCache.h"
  30 #endif
  31 #include "nsThreadUtils.h"
  32
  33 using mozilla::dom::GetNameSpaceManager;
  34
  35 nsDOMScriptObjectFactory::nsDOMScriptObjectFactory()
  36 {
  37   nsCOMPtr<nsIObserverService> observerService =
  38     mozilla::services::GetObserverService();
  39   if (observerService) {
  40     observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
  41   }
  42
  43 }
  44
  45 NS_INTERFACE_MAP_BEGIN(nsDOMScriptObjectFactory)
  46   NS_INTERFACE_MAP_ENTRY(nsIDOMScriptObjectFactory)
  47   NS_INTERFACE_MAP_ENTRY(nsIObserver)
  48   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMScriptObjectFactory)
  49 NS_INTERFACE_MAP_END
  50
  51
  52 NS_IMPL_ADDREF(nsDOMScriptObjectFactory)
  53 NS_IMPL_RELEASE(nsDOMScriptObjectFactory)
  54
  55 NS_IMETHODIMP_(nsISupports *)
  56 nsDOMScriptObjectFactory::GetClassInfoInstance(nsDOMClassInfoID aID)
  57 {
  58   return NS_GetDOMClassInfoInstance(aID);
  59 }
  60
  61 NS_IMETHODIMP_(nsISupports *)
  62 nsDOMScriptObjectFactory::GetExternalClassInfoInstance(const nsAString& aName)
  63 {
  64   nsScriptNameSpaceManager *nameSpaceManager = GetNameSpaceManager();
  65   NS_ENSURE_TRUE(nameSpaceManager, nullptr);
  66
  67   const nsGlobalNameStruct *globalStruct = nameSpaceManager->LookupName(aName);
  68   if (globalStruct) {
  69     if (globalStruct->mType == nsGlobalNameStruct::eTypeExternalClassInfoCreator) {
  70       nsresult rv;
  71       nsCOMPtr<nsIDOMCIExtension> creator(do_CreateInstance(globalStruct->mCID, &rv));
  72       NS_ENSURE_SUCCESS(rv, nullptr);
  73
  74       rv = creator->RegisterDOMCI(NS_ConvertUTF16toUTF8(aName).get(), this);
  75       NS_ENSURE_SUCCESS(rv, nullptr);
  76
  77       globalStruct = nameSpaceManager->LookupName(aName);
  78       NS_ENSURE_TRUE(globalStruct, nullptr);
  79
  80       NS_ASSERTION(globalStruct->mType == nsGlobalNameStruct::eTypeExternalClassInfo,
  81                    "The classinfo data for this class didn't get registered.");
  82     }
  83     if (globalStruct->mType == nsGlobalNameStruct::eTypeExternalClassInfo) {
  84       return nsDOMClassInfo::GetClassInfoInstance(globalStruct->mData);
  85     }
  86   }
  87   return nullptr;
  88 }
  89
  90 NS_IMETHODIMP
  91 nsDOMScriptObjectFactory::Observe(nsISupports *aSubject,
  92                                   const char *aTopic,
  93                                   const char16_t *someData)
  94 {
  95   if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
  96 #ifdef MOZ_XUL
  97     // Flush the XUL cache since it holds JS roots, and we're about to
  98     // start the final GC.
  99     nsXULPrototypeCache* cache = nsXULPrototypeCache::GetInstance();
 100
 101     if (cache)
 102       cache->Flush();
 103 #endif
 104   }
 105
 106   return NS_OK;
 107 }
 108
 109 NS_IMETHODIMP
 110 nsDOMScriptObjectFactory::RegisterDOMClassInfo(const char *aName,
 111                                                nsDOMClassInfoExternalConstructorFnc aConstructorFptr,
 112                                                const nsIID *aProtoChainInterface,
 113                                                const nsIID **aInterfaces,
 114                                                uint32_t aScriptableFlags,
 115                                                bool aHasClassInterface,
 116                                                const nsCID *aConstructorCID)
 117 {
 118   nsScriptNameSpaceManager *nameSpaceManager = GetNameSpaceManager();
 119   NS_ENSURE_TRUE(nameSpaceManager, NS_ERROR_NOT_INITIALIZED);
 120
 121   return nameSpaceManager->RegisterDOMCIData(aName,
 122                                              aConstructorFptr,
 123                                              aProtoChainInterface,
 124                                              aInterfaces,
 125                                              aScriptableFlags,
 126                                              aHasClassInterface,
 127                                              aConstructorCID);
 128 }