nsDOMScriptObjectFactory.cpp
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* The Original Code is mozilla.org code.
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* Contributor(s):
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 2000
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 03/27/2000 IBM Corp. Added PR_CALLBACK for Optlink
* use in OS2
*/
#include "nsDOMScriptObjectFactory.h"
#include "xpcexception.h"
#include "nsScriptNameSpaceManager.h"
#include "nsIObserverService.h"
#include "nsJSEnvironment.h"
#include "nsJSEventListener.h"
#include "nsGlobalWindow.h"
#include "nsIJSContextStack.h"
#include "nsISupportsPrimitives.h"
#include "nsDOMException.h"
#include "nsCRT.h"
#ifdef MOZ_XUL
#include "nsXULPrototypeCache.h"
#endif
#include "nsThreadUtils.h"
static NS_DEFINE_CID(kDOMScriptObjectFactoryCID, NS_DOM_SCRIPT_OBJECT_FACTORY_CID);
nsIExceptionProvider* gExceptionProvider = nsnull;
nsDOMScriptObjectFactory::nsDOMScriptObjectFactory() :
mLoadedAllLanguages(PR_FALSE)
{
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, PR_FALSE);
}
nsCOMPtr<nsIExceptionProvider> provider(new nsDOMExceptionProvider());
if (provider) {
nsCOMPtr<nsIExceptionService> xs =
do_GetService(NS_EXCEPTIONSERVICE_CONTRACTID);
if (xs) {
xs->RegisterExceptionProvider(provider, NS_ERROR_MODULE_DOM);
xs->RegisterExceptionProvider(provider, NS_ERROR_MODULE_DOM_RANGE);
#ifdef MOZ_SVG
xs->RegisterExceptionProvider(provider, NS_ERROR_MODULE_SVG);
#endif
xs->RegisterExceptionProvider(provider, NS_ERROR_MODULE_DOM_XPATH);
xs->RegisterExceptionProvider(provider, NS_ERROR_MODULE_DOM_INDEXEDDB);
xs->RegisterExceptionProvider(provider, NS_ERROR_MODULE_XPCONNECT);
xs->RegisterExceptionProvider(provider, NS_ERROR_MODULE_DOM_EVENTS);
}
NS_ASSERTION(!gExceptionProvider, "Registered twice?!");
provider.swap(gExceptionProvider);
}
// And pre-create the javascript language.
NS_CreateJSRuntime(getter_AddRefs(mLanguageArray[NS_STID_INDEX(nsIProgrammingLanguage::JAVASCRIPT)]));
}
NS_INTERFACE_MAP_BEGIN(nsDOMScriptObjectFactory)
NS_INTERFACE_MAP_ENTRY(nsIDOMScriptObjectFactory)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMScriptObjectFactory)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(nsDOMScriptObjectFactory)
NS_IMPL_RELEASE(nsDOMScriptObjectFactory)
/**
* Notes about language registration (for language other than js):
* - All language are expected to register (at least) 2 contract IDs
* @mozilla.org/script-language;1?id=%d
* using the language ID as defined in nsIProgrammingLanguage, and
* @mozilla.org/script-language;1?script-type=%s
* using the "mime-type" of the script language
*
* Theoretically, a language could register multiple script-type
* names, although this is discouraged - each language should have one,
* canonical name.
*
* The most common case is that languages are looked up by ID. For this
* reason, we keep an array of languages indexed by this ID - the registry
* is only looked the first request for a language ID.
*
* The registry is looked up and getService called for each query by name.
* (As services are cached by CID, multiple contractIDs will still work
* correctly)
**/
NS_IMETHODIMP
nsDOMScriptObjectFactory::GetScriptRuntime(const nsAString &aLanguageName,
nsIScriptRuntime **aLanguage)
{
// Note that many callers have optimized detection for JS (along with
// supporting various alternate names for JS), so don't call this.
// One exception is for the new "script-type" attribute on a node - and
// there is no need to support backwards compatible names.
// As JS is the default language, this is still rarely called for JS -
// only when a node explicitly sets JS - so that is done last.
nsCAutoString contractid(NS_LITERAL_CSTRING(
"@mozilla.org/script-language;1?script-type="));
// Arbitrarily use utf8 encoding should the name have extended chars
AppendUTF16toUTF8(aLanguageName, contractid);
nsresult rv;
nsCOMPtr<nsIScriptRuntime> lang =
do_GetService(contractid.get(), &rv);
if (NS_FAILED(rv)) {
if (aLanguageName.Equals(NS_LITERAL_STRING("application/javascript")))
return GetScriptRuntimeByID(nsIProgrammingLanguage::JAVASCRIPT, aLanguage);
// Not JS and nothing else we know about.
NS_WARNING("No script language registered for this mime-type");
return NS_ERROR_FACTORY_NOT_REGISTERED;
}
// And stash it away in our array for fast lookup by ID.
PRUint32 lang_ndx = NS_STID_INDEX(lang->GetScriptTypeID());
if (mLanguageArray[lang_ndx] == nsnull) {
mLanguageArray[lang_ndx] = lang;
} else {
// All languages are services - we should have an identical object!
NS_ASSERTION(mLanguageArray[lang_ndx] == lang,
"Got a different language for this ID???");
}
*aLanguage = lang;
NS_IF_ADDREF(*aLanguage);
return NS_OK;
}
NS_IMETHODIMP
nsDOMScriptObjectFactory::GetScriptRuntimeByID(PRUint32 aLanguageID,
nsIScriptRuntime **aLanguage)
{
if (!NS_STID_VALID(aLanguageID)) {
NS_WARNING("Unknown script language");
return NS_ERROR_UNEXPECTED;
}
*aLanguage = mLanguageArray[NS_STID_INDEX(aLanguageID)];
if (!*aLanguage) {
nsCAutoString contractid(NS_LITERAL_CSTRING(
"@mozilla.org/script-language;1?id="));
char langIdStr[25]; // space for an int.
sprintf(langIdStr, "%d", aLanguageID);
contractid += langIdStr;
nsresult rv;
nsCOMPtr<nsIScriptRuntime> lang = do_GetService(contractid.get(), &rv);
if (NS_FAILED(rv)) {
NS_ERROR("Failed to get the script language");
return rv;
}
// Stash it away in our array for fast lookup by ID.
mLanguageArray[NS_STID_INDEX(aLanguageID)] = lang;
*aLanguage = lang;
}
NS_IF_ADDREF(*aLanguage);
return NS_OK;
}
NS_IMETHODIMP
nsDOMScriptObjectFactory::GetIDForScriptType(const nsAString &aLanguageName,
PRUint32 *aScriptTypeID)
{
nsCOMPtr<nsIScriptRuntime> languageRuntime;
nsresult rv;
rv = GetScriptRuntime(aLanguageName, getter_AddRefs(languageRuntime));
if (NS_FAILED(rv))
return rv;
*aScriptTypeID = languageRuntime->GetScriptTypeID();
return NS_OK;
}
NS_IMETHODIMP
nsDOMScriptObjectFactory::NewScriptGlobalObject(PRBool aIsChrome,
PRBool aIsModalContentWindow,
nsIScriptGlobalObject **aGlobal)
{
return NS_NewScriptGlobalObject(aIsChrome, aIsModalContentWindow, aGlobal);
}
NS_IMETHODIMP_(nsISupports *)
nsDOMScriptObjectFactory::GetClassInfoInstance(nsDOMClassInfoID aID)
{
return NS_GetDOMClassInfoInstance(aID);
}
NS_IMETHODIMP_(nsISupports *)
nsDOMScriptObjectFactory::GetExternalClassInfoInstance(const nsAString& aName)
{
nsScriptNameSpaceManager *nameSpaceManager = nsJSRuntime::GetNameSpaceManager();
NS_ENSURE_TRUE(nameSpaceManager, nsnull);
const nsGlobalNameStruct *globalStruct;
nameSpaceManager->LookupName(aName, &globalStruct);
if (globalStruct) {
if (globalStruct->mType == nsGlobalNameStruct::eTypeExternalClassInfoCreator) {
nsresult rv;
nsCOMPtr<nsIDOMCIExtension> creator(do_CreateInstance(globalStruct->mCID, &rv));
NS_ENSURE_SUCCESS(rv, nsnull);
rv = creator->RegisterDOMCI(NS_ConvertUTF16toUTF8(aName).get(), this);
NS_ENSURE_SUCCESS(rv, nsnull);
rv = nameSpaceManager->LookupName(aName, &globalStruct);
NS_ENSURE_TRUE(NS_SUCCEEDED(rv) && globalStruct, nsnull);
NS_ASSERTION(globalStruct->mType == nsGlobalNameStruct::eTypeExternalClassInfo,
"The classinfo data for this class didn't get registered.");
}
if (globalStruct->mType == nsGlobalNameStruct::eTypeExternalClassInfo) {
return nsDOMClassInfo::GetClassInfoInstance(globalStruct->mData);
}
}
return nsnull;
}
NS_IMETHODIMP
nsDOMScriptObjectFactory::Observe(nsISupports *aSubject,
const char *aTopic,
const PRUnichar *someData)
{
if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
#ifdef MOZ_XUL
// Flush the XUL cache since it holds JS roots, and we're about to
// start the final GC.
nsXULPrototypeCache* cache = nsXULPrototypeCache::GetInstance();
if (cache)
cache->Flush();
#endif
nsGlobalWindow::ShutDown();
nsDOMClassInfo::ShutDown();
if (gExceptionProvider) {
nsCOMPtr<nsIExceptionService> xs =
do_GetService(NS_EXCEPTIONSERVICE_CONTRACTID);
if (xs) {
xs->UnregisterExceptionProvider(gExceptionProvider,
NS_ERROR_MODULE_DOM);
xs->UnregisterExceptionProvider(gExceptionProvider,
NS_ERROR_MODULE_DOM_RANGE);
#ifdef MOZ_SVG
xs->UnregisterExceptionProvider(gExceptionProvider,
NS_ERROR_MODULE_SVG);
#endif
xs->UnregisterExceptionProvider(gExceptionProvider,
NS_ERROR_MODULE_DOM_XPATH);
xs->UnregisterExceptionProvider(gExceptionProvider,
NS_ERROR_MODULE_XPCONNECT);
xs->UnregisterExceptionProvider(gExceptionProvider,
NS_ERROR_MODULE_DOM_EVENTS);
}
NS_RELEASE(gExceptionProvider);
}
}
return NS_OK;
}
static nsresult
CreateXPConnectException(nsresult aResult, nsIException *aDefaultException,
nsIException **_retval)
{
// See whether we already have a useful XPConnect exception. If we
// do, let's not create one with _less_ information!
nsCOMPtr<nsIXPCException> exception(do_QueryInterface(aDefaultException));
if (!exception) {
nsresult rv = NS_OK;
exception = do_CreateInstance("@mozilla.org/js/xpc/Exception;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = exception->Initialize(nsnull, aResult, nsnull, nsnull, nsnull,
nsnull);
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ADDREF(*_retval = exception);
return NS_OK;
}
NS_IMETHODIMP
nsDOMScriptObjectFactory::RegisterDOMClassInfo(const char *aName,
nsDOMClassInfoExternalConstructorFnc aConstructorFptr,
const nsIID *aProtoChainInterface,
const nsIID **aInterfaces,
PRUint32 aScriptableFlags,
PRBool aHasClassInterface,
const nsCID *aConstructorCID)
{
nsScriptNameSpaceManager *nameSpaceManager = nsJSRuntime::GetNameSpaceManager();
NS_ENSURE_TRUE(nameSpaceManager, NS_ERROR_NOT_INITIALIZED);
return nameSpaceManager->RegisterDOMCIData(aName,
aConstructorFptr,
aProtoChainInterface,
aInterfaces,
aScriptableFlags,
aHasClassInterface,
aConstructorCID);
}
// Factories
nsresult NS_GetScriptRuntime(const nsAString &aLanguageName,
nsIScriptRuntime **aLanguage)
{
nsresult rv;
*aLanguage = nsnull;
nsCOMPtr<nsIDOMScriptObjectFactory> factory = \
do_GetService(kDOMScriptObjectFactoryCID, &rv);
if (NS_FAILED(rv))
return rv;
return factory->GetScriptRuntime(aLanguageName, aLanguage);
}
nsresult NS_GetScriptRuntimeByID(PRUint32 aScriptTypeID,
nsIScriptRuntime **aLanguage)
{
nsresult rv;
*aLanguage = nsnull;
nsCOMPtr<nsIDOMScriptObjectFactory> factory = \
do_GetService(kDOMScriptObjectFactoryCID, &rv);
if (NS_FAILED(rv))
return rv;
return factory->GetScriptRuntimeByID(aScriptTypeID, aLanguage);
}
NS_IMPL_THREADSAFE_ISUPPORTS1(nsDOMExceptionProvider, nsIExceptionProvider)
NS_IMETHODIMP
nsDOMExceptionProvider::GetException(nsresult result,
nsIException *aDefaultException,
nsIException **_retval)
{
if (!NS_IsMainThread()) {
return NS_ERROR_NOT_IMPLEMENTED;
}
switch (NS_ERROR_GET_MODULE(result))
{
case NS_ERROR_MODULE_DOM_RANGE:
return NS_NewRangeException(result, aDefaultException, _retval);
#ifdef MOZ_SVG
case NS_ERROR_MODULE_SVG:
return NS_NewSVGException(result, aDefaultException, _retval);
#endif
case NS_ERROR_MODULE_DOM_XPATH:
return NS_NewXPathException(result, aDefaultException, _retval);
case NS_ERROR_MODULE_XPCONNECT:
return CreateXPConnectException(result, aDefaultException, _retval);
case NS_ERROR_MODULE_DOM_FILE:
return NS_NewFileException(result, aDefaultException, _retval);
case NS_ERROR_MODULE_DOM_INDEXEDDB:
return NS_NewIDBDatabaseException(result, aDefaultException, _retval);
case NS_ERROR_MODULE_DOM_EVENTS:
return NS_NewEventException(result, aDefaultException, _retval);
default:
return NS_NewDOMException(result, aDefaultException, _retval);
}
NS_NOTREACHED("Not reached");
return NS_ERROR_UNEXPECTED;
}
