gecko/dom/indexedDB/IDBRequest.cpp

444 lines
11 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "IDBRequest.h"
#include "nsIJSContextStack.h"
#include "nsIScriptContext.h"
#include "nsComponentManagerUtils.h"
#include "nsDOMClassInfoID.h"
#include "nsDOMJSUtils.h"
#include "nsContentUtils.h"
#include "nsEventDispatcher.h"
#include "nsPIDOMWindow.h"
#include "nsStringGlue.h"
#include "nsThreadUtils.h"
#include "nsWrapperCacheInlines.h"
#include "AsyncConnectionHelper.h"
#include "IDBEvents.h"
#include "IDBTransaction.h"
#include "DOMError.h"
USING_INDEXEDDB_NAMESPACE
IDBRequest::IDBRequest()
: mResultVal(JSVAL_VOID),
mActorParent(nsnull),
mErrorCode(NS_OK),
mHaveResultOrErrorCode(false),
mRooted(false)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
}
IDBRequest::~IDBRequest()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
UnrootResultVal();
}
// static
already_AddRefed<IDBRequest>
IDBRequest::Create(nsISupports* aSource,
IDBWrapperCache* aOwnerCache,
IDBTransaction* aTransaction)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsRefPtr<IDBRequest> request(new IDBRequest());
request->mSource = aSource;
request->mTransaction = aTransaction;
request->BindToOwner(aOwnerCache);
if (!request->SetScriptOwner(aOwnerCache->GetScriptOwner())) {
return nsnull;
}
return request.forget();
}
void
IDBRequest::Reset()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
mResultVal = JSVAL_VOID;
mHaveResultOrErrorCode = false;
mError = nsnull;
UnrootResultVal();
}
nsresult
IDBRequest::NotifyHelperCompleted(HelperBase* aHelper)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!mHaveResultOrErrorCode, "Already called!");
NS_ASSERTION(!PreservingWrapper(), "Already rooted?!");
NS_ASSERTION(JSVAL_IS_VOID(mResultVal), "Should be undefined!");
// See if our window is still valid. If not then we're going to pretend that
// we never completed.
if (NS_FAILED(CheckInnerWindowCorrectness())) {
return NS_OK;
}
mHaveResultOrErrorCode = true;
nsresult rv = aHelper->GetResultCode();
// If the request failed then set the error code and return.
if (NS_FAILED(rv)) {
SetError(rv);
return NS_OK;
}
// Otherwise we need to get the result from the helper.
JSContext* cx = GetJSContext();
if (!cx) {
NS_WARNING("Failed to get safe JSContext!");
rv = NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR;
SetError(rv);
return rv;
}
JSObject* global = GetParentObject();
NS_ASSERTION(global, "This should never be null!");
JSAutoRequest ar(cx);
JSAutoEnterCompartment ac;
if (ac.enter(cx, global)) {
RootResultVal();
rv = aHelper->GetSuccessResult(cx, &mResultVal);
if (NS_FAILED(rv)) {
NS_WARNING("GetSuccessResult failed!");
}
}
else {
NS_WARNING("Failed to enter correct compartment!");
rv = NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR;
}
if (NS_SUCCEEDED(rv)) {
mError = nsnull;
}
else {
SetError(rv);
mResultVal = JSVAL_VOID;
}
return rv;
}
void
IDBRequest::NotifyHelperSentResultsToChildProcess(nsresult aRv)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!mHaveResultOrErrorCode, "Already called!");
NS_ASSERTION(!PreservingWrapper(), "Already rooted?!");
NS_ASSERTION(JSVAL_IS_VOID(mResultVal), "Should be undefined!");
// See if our window is still valid. If not then we're going to pretend that
// we never completed.
if (NS_FAILED(CheckInnerWindowCorrectness())) {
return;
}
mHaveResultOrErrorCode = true;
if (NS_FAILED(aRv)) {
SetError(aRv);
}
}
void
IDBRequest::SetError(nsresult aRv)
{
NS_ASSERTION(NS_FAILED(aRv), "Er, what?");
NS_ASSERTION(!mError, "Already have an error?");
mHaveResultOrErrorCode = true;
mError = DOMError::CreateForNSResult(aRv);
mErrorCode = aRv;
mResultVal = JSVAL_VOID;
UnrootResultVal();
}
#ifdef DEBUG
nsresult
IDBRequest::GetErrorCode() const
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(mHaveResultOrErrorCode, "Don't call me yet!");
return mErrorCode;
}
#endif
JSContext*
IDBRequest::GetJSContext()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
JSContext* cx;
if (GetScriptOwner()) {
nsIThreadJSContextStack* cxStack = nsContentUtils::ThreadJSContextStack();
NS_ASSERTION(cxStack, "Failed to get thread context stack!");
cx = cxStack->GetSafeJSContext();
NS_ENSURE_TRUE(cx, nsnull);
return cx;
}
nsresult rv;
nsIScriptContext* sc = GetContextForEventHandlers(&rv);
NS_ENSURE_SUCCESS(rv, nsnull);
NS_ENSURE_TRUE(sc, nsnull);
cx = sc->GetNativeContext();
NS_ASSERTION(cx, "Failed to get a context!");
return cx;
}
void
IDBRequest::RootResultValInternal()
{
NS_HOLD_JS_OBJECTS(this, IDBRequest);
}
void
IDBRequest::UnrootResultValInternal()
{
NS_DROP_JS_OBJECTS(this, IDBRequest);
}
NS_IMETHODIMP
IDBRequest::GetReadyState(nsAString& aReadyState)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (mHaveResultOrErrorCode) {
aReadyState.AssignLiteral("done");
}
else {
aReadyState.AssignLiteral("pending");
}
return NS_OK;
}
NS_IMETHODIMP
IDBRequest::GetSource(nsISupports** aSource)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsCOMPtr<nsISupports> source(mSource);
source.forget(aSource);
return NS_OK;
}
NS_IMETHODIMP
IDBRequest::GetTransaction(nsIIDBTransaction** aTransaction)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsCOMPtr<nsIIDBTransaction> transaction(mTransaction);
transaction.forget(aTransaction);
return NS_OK;
}
NS_IMETHODIMP
IDBRequest::GetResult(jsval* aResult)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!mHaveResultOrErrorCode) {
// XXX Need a real error code here.
return NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR;
}
*aResult = mResultVal;
return NS_OK;
}
NS_IMETHODIMP
IDBRequest::GetError(nsIDOMDOMError** aError)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!mHaveResultOrErrorCode) {
// XXX Need a real error code here.
return NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR;
}
NS_IF_ADDREF(*aError = mError);
return NS_OK;
}
NS_IMPL_CYCLE_COLLECTION_CLASS(IDBRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(IDBRequest, IDBWrapperCache)
// Don't need NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS because
// nsDOMEventTargetHelper does it for us.
NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(success)
NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(error)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mSource)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(mTransaction,
nsPIDOMEventTarget)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(IDBRequest, IDBWrapperCache)
tmp->mResultVal = JSVAL_VOID;
tmp->UnrootResultVal();
NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(success)
NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(error)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mSource)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mTransaction)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(IDBRequest, IDBWrapperCache)
// Don't need NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER because
// nsDOMEventTargetHelper does it for us.
if (JSVAL_IS_GCTHING(tmp->mResultVal)) {
void *gcThing = JSVAL_TO_GCTHING(tmp->mResultVal);
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_CALLBACK(gcThing, "mResultVal")
}
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(IDBRequest)
NS_INTERFACE_MAP_ENTRY(nsIIDBRequest)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(IDBRequest)
NS_INTERFACE_MAP_END_INHERITING(IDBWrapperCache)
NS_IMPL_ADDREF_INHERITED(IDBRequest, IDBWrapperCache)
NS_IMPL_RELEASE_INHERITED(IDBRequest, IDBWrapperCache)
DOMCI_DATA(IDBRequest, IDBRequest)
NS_IMPL_EVENT_HANDLER(IDBRequest, success);
NS_IMPL_EVENT_HANDLER(IDBRequest, error);
nsresult
IDBRequest::PreHandleEvent(nsEventChainPreVisitor& aVisitor)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
aVisitor.mCanHandle = true;
aVisitor.mParentTarget = mTransaction;
return NS_OK;
}
IDBOpenDBRequest::~IDBOpenDBRequest()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
UnrootResultVal();
}
// static
already_AddRefed<IDBOpenDBRequest>
IDBOpenDBRequest::Create(nsPIDOMWindow* aOwner,
JSObject* aScriptOwner)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsRefPtr<IDBOpenDBRequest> request(new IDBOpenDBRequest());
request->BindToOwner(aOwner);
if (!request->SetScriptOwner(aScriptOwner)) {
return nsnull;
}
return request.forget();
}
void
IDBOpenDBRequest::SetTransaction(IDBTransaction* aTransaction)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!aTransaction || !mTransaction,
"Shouldn't have a transaction here!");
mTransaction = aTransaction;
}
void
IDBOpenDBRequest::RootResultValInternal()
{
NS_HOLD_JS_OBJECTS(this, IDBOpenDBRequest);
}
void
IDBOpenDBRequest::UnrootResultValInternal()
{
NS_DROP_JS_OBJECTS(this, IDBOpenDBRequest);
}
NS_IMPL_CYCLE_COLLECTION_CLASS(IDBOpenDBRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(IDBOpenDBRequest,
IDBRequest)
NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(upgradeneeded)
NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(blocked)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(IDBOpenDBRequest,
IDBRequest)
NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(upgradeneeded)
NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(blocked)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(IDBOpenDBRequest)
NS_INTERFACE_MAP_ENTRY(nsIIDBOpenDBRequest)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(IDBOpenDBRequest)
NS_INTERFACE_MAP_END_INHERITING(IDBRequest)
NS_IMPL_ADDREF_INHERITED(IDBOpenDBRequest, IDBRequest)
NS_IMPL_RELEASE_INHERITED(IDBOpenDBRequest, IDBRequest)
DOMCI_DATA(IDBOpenDBRequest, IDBOpenDBRequest)
NS_IMPL_EVENT_HANDLER(IDBOpenDBRequest, blocked);
NS_IMPL_EVENT_HANDLER(IDBOpenDBRequest, upgradeneeded);
nsresult
IDBOpenDBRequest::PostHandleEvent(nsEventChainPostVisitor& aVisitor)
{
NS_ENSURE_TRUE(aVisitor.mDOMEvent, NS_ERROR_UNEXPECTED);
nsPIDOMWindow* owner = GetOwner();
if (!owner) {
return NS_OK;
}
if (aVisitor.mEventStatus != nsEventStatus_eConsumeNoDefault) {
nsString type;
nsresult rv = aVisitor.mDOMEvent->GetType(type);
NS_ENSURE_SUCCESS(rv, rv);
if (type.EqualsLiteral(ERROR_EVT_STR)) {
nsRefPtr<nsDOMEvent> duplicateEvent =
CreateGenericEvent(type, eDoesNotBubble, eNotCancelable);
NS_ENSURE_STATE(duplicateEvent);
nsCOMPtr<nsIDOMEventTarget> target(do_QueryInterface(owner));
NS_ASSERTION(target, "How can this happen?!");
bool dummy;
rv = target->DispatchEvent(duplicateEvent, &dummy);
if (NS_FAILED(rv)) {
return rv;
}
}
}
return NS_OK;
}