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IDBRequest.cpp
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IDBRequest.cpp
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Indexed Database.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Shawn Wilsher <me@shawnwilsher.com>
* Ben Turner <bent.mozilla@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "IDBRequest.h"
#include "nsIScriptContext.h"
#include "nsIVariant.h"
#include "nsComponentManagerUtils.h"
#include "nsDOMClassInfo.h"
#include "nsDOMJSUtils.h"
#include "nsEventDispatcher.h"
#include "nsPIDOMWindow.h"
#include "nsStringGlue.h"
#include "nsThreadUtils.h"
#include "AsyncConnectionHelper.h"
#include "IDBEvents.h"
#include "IDBTransaction.h"
USING_INDEXEDDB_NAMESPACE
IDBRequest::IDBRequest()
: mResultVal(JSVAL_VOID),
mErrorCode(0),
mResultValRooted(false),
mHaveResultOrErrorCode(false)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
}
IDBRequest::~IDBRequest()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (mResultValRooted) {
// Calling a virtual from the destructor is bad... But we know that we won't
// call a subclass' implementation because mResultValRooted will be set to
// false.
UnrootResultVal();
}
if (mListenerManager) {
mListenerManager->Disconnect();
}
}
// static
already_AddRefed<IDBRequest>
IDBRequest::Create(nsISupports* aSource,
nsIScriptContext* aScriptContext,
nsPIDOMWindow* aOwner,
IDBTransaction* aTransaction)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!aScriptContext || !aOwner) {
NS_ERROR("Null context and owner!");
return nsnull;
}
nsRefPtr<IDBRequest> request(new IDBRequest());
request->mSource = aSource;
request->mTransaction = aTransaction;
request->mScriptContext = aScriptContext;
request->mOwner = aOwner;
return request.forget();
}
void
IDBRequest::Reset()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
mResultVal = JSVAL_VOID;
mHaveResultOrErrorCode = false;
mErrorCode = 0;
if (mResultValRooted) {
UnrootResultVal();
}
}
nsresult
IDBRequest::SetDone(AsyncConnectionHelper* aHelper)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
NS_ASSERTION(!mHaveResultOrErrorCode, "Already called!");
NS_ASSERTION(!mResultValRooted, "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)) {
mErrorCode = NS_ERROR_GET_CODE(rv);
return NS_OK;
}
// Otherwise we need to get the result from the helper.
JSContext* cx = static_cast<JSContext*>(mScriptContext->GetNativeContext());
NS_ASSERTION(cx, "Failed to get a context!");
JSObject* global = static_cast<JSObject*>(mScriptContext->GetNativeGlobal());
NS_ASSERTION(global, "Failed to get global object!");
JSAutoRequest ar(cx);
JSAutoEnterCompartment ac;
if (!ac.enter(cx, global)) {
rv = NS_ERROR_DOM_INDEXEDDB_UNKNOWN_ERR;
}
else {
RootResultVal();
rv = aHelper->GetSuccessResult(cx, &mResultVal);
if (NS_SUCCEEDED(rv)) {
// Unroot if we don't really need to be rooted.
if (!JSVAL_IS_GCTHING(mResultVal)) {
UnrootResultVal();
}
}
else {
NS_WARNING("GetSuccessResult failed!");
}
}
if (NS_SUCCEEDED(rv)) {
mErrorCode = 0;
}
else {
mErrorCode = NS_ERROR_GET_CODE(rv);
mResultVal = JSVAL_VOID;
}
return rv;
}
void
IDBRequest::RootResultVal()
{
NS_ASSERTION(!mResultValRooted, "This should be false!");
NS_HOLD_JS_OBJECTS(this, IDBRequest);
mResultValRooted = true;
}
void
IDBRequest::UnrootResultVal()
{
NS_ASSERTION(mResultValRooted, "This should be true!");
NS_DROP_JS_OBJECTS(this, IDBRequest);
mResultValRooted = false;
}
NS_IMETHODIMP
IDBRequest::GetReadyState(PRUint16* aReadyState)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (mHaveResultOrErrorCode) {
*aReadyState = nsIIDBRequest::DONE;
}
else {
*aReadyState = nsIIDBRequest::LOADING;
}
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::GetErrorCode(PRUint16* aErrorCode)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!mHaveResultOrErrorCode) {
// XXX Need a real error code here.
return NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR;
}
*aErrorCode = mErrorCode;
return NS_OK;
}
NS_IMETHODIMP
IDBRequest::SetOnsuccess(nsIDOMEventListener* aSuccessListener)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
return RemoveAddEventListener(NS_LITERAL_STRING(SUCCESS_EVT_STR),
mOnSuccessListener, aSuccessListener);
}
NS_IMETHODIMP
IDBRequest::GetOnsuccess(nsIDOMEventListener** aSuccessListener)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
return GetInnerEventListener(mOnSuccessListener, aSuccessListener);
}
NS_IMETHODIMP
IDBRequest::SetOnerror(nsIDOMEventListener* aErrorListener)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
return RemoveAddEventListener(NS_LITERAL_STRING(ERROR_EVT_STR),
mOnErrorListener, aErrorListener);
}
NS_IMETHODIMP
IDBRequest::GetOnerror(nsIDOMEventListener** aErrorListener)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
return GetInnerEventListener(mOnErrorListener, aErrorListener);
}
NS_IMPL_CYCLE_COLLECTION_CLASS(IDBRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(IDBRequest,
nsDOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mOnSuccessListener)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mOnErrorListener)
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,
nsDOMEventTargetHelper)
if (tmp->mResultValRooted) {
tmp->mResultVal = JSVAL_VOID;
tmp->UnrootResultVal();
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mOnSuccessListener)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mOnErrorListener)
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(IDBRequest)
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(nsDOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(IDBRequest, nsDOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(IDBRequest, nsDOMEventTargetHelper)
DOMCI_DATA(IDBRequest, IDBRequest)
nsresult
IDBRequest::PreHandleEvent(nsEventChainPreVisitor& aVisitor)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
aVisitor.mCanHandle = PR_TRUE;
aVisitor.mParentTarget = mTransaction;
return NS_OK;
}
IDBVersionChangeRequest::~IDBVersionChangeRequest()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (mResultValRooted) {
UnrootResultVal();
}
}
// static
already_AddRefed<IDBVersionChangeRequest>
IDBVersionChangeRequest::Create(nsISupports* aSource,
nsIScriptContext* aScriptContext,
nsPIDOMWindow* aOwner,
IDBTransaction* aTransaction)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
if (!aScriptContext || !aOwner) {
NS_ERROR("Null context and owner!");
return nsnull;
}
nsRefPtr<IDBVersionChangeRequest> request(new IDBVersionChangeRequest());
request->mSource = aSource;
request->mTransaction = aTransaction;
request->mScriptContext = aScriptContext;
request->mOwner = aOwner;
return request.forget();
}
void
IDBVersionChangeRequest::RootResultVal()
{
NS_ASSERTION(!mResultValRooted, "This should be false!");
NS_HOLD_JS_OBJECTS(this, IDBVersionChangeRequest);
mResultValRooted = true;
}
void
IDBVersionChangeRequest::UnrootResultVal()
{
NS_ASSERTION(mResultValRooted, "This should be true!");
NS_DROP_JS_OBJECTS(this, IDBVersionChangeRequest);
mResultValRooted = false;
}
NS_IMETHODIMP
IDBVersionChangeRequest::SetOnblocked(nsIDOMEventListener* aBlockedListener)
{
return RemoveAddEventListener(NS_LITERAL_STRING(BLOCKED_EVT_STR),
mOnBlockedListener, aBlockedListener);
}
NS_IMETHODIMP
IDBVersionChangeRequest::GetOnblocked(nsIDOMEventListener** aBlockedListener)
{
return GetInnerEventListener(mOnBlockedListener, aBlockedListener);
}
NS_IMPL_CYCLE_COLLECTION_CLASS(IDBVersionChangeRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(IDBVersionChangeRequest,
IDBRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mOnBlockedListener)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(IDBVersionChangeRequest,
IDBRequest)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mOnBlockedListener)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(IDBVersionChangeRequest)
NS_INTERFACE_MAP_ENTRY(nsIIDBVersionChangeRequest)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(IDBVersionChangeRequest)
NS_INTERFACE_MAP_END_INHERITING(IDBRequest)
NS_IMPL_ADDREF_INHERITED(IDBVersionChangeRequest, IDBRequest)
NS_IMPL_RELEASE_INHERITED(IDBVersionChangeRequest, IDBRequest)
DOMCI_DATA(IDBVersionChangeRequest, IDBVersionChangeRequest)