gecko-dev/dom/base/DOMRequest.cpp
Phil Ringnalda 53745073f0 Back out 13 changesets (bug 1170760) for Gu bustage in homescreen/test/unit/apps_test.js
CLOSED TREE

Backed out changeset 5d84599a8846 (bug 1170760)
Backed out changeset 6104fe33d5f5 (bug 1170760)
Backed out changeset 1dfb229da01d (bug 1170760)
Backed out changeset f380faddfdd8 (bug 1170760)
Backed out changeset 541831dc6b57 (bug 1170760)
Backed out changeset 6a5b7dfab882 (bug 1170760)
Backed out changeset ee514a256922 (bug 1170760)
Backed out changeset 3c2c1acc34ee (bug 1170760)
Backed out changeset dc2a7f5dc5d6 (bug 1170760)
Backed out changeset b312a08fbab5 (bug 1170760)
Backed out changeset cb6aba9b8497 (bug 1170760)
Backed out changeset 39e4f5b1ba40 (bug 1170760)
Backed out changeset 7d79cce3630a (bug 1170760)
2015-11-25 21:02:55 -08:00

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=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 "DOMRequest.h"
#include "DOMError.h"
#include "nsThreadUtils.h"
#include "DOMCursor.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/ScriptSettings.h"
#include "jsfriendapi.h"
using mozilla::dom::AnyCallback;
using mozilla::dom::DOMError;
using mozilla::dom::DOMRequest;
using mozilla::dom::DOMRequestService;
using mozilla::dom::DOMCursor;
using mozilla::dom::Promise;
using mozilla::dom::AutoJSAPI;
DOMRequest::DOMRequest(nsPIDOMWindow* aWindow)
: DOMEventTargetHelper(aWindow->IsInnerWindow() ?
aWindow : aWindow->GetCurrentInnerWindow())
, mResult(JS::UndefinedValue())
, mDone(false)
{
}
DOMRequest::DOMRequest(nsIGlobalObject* aGlobal)
: DOMEventTargetHelper(aGlobal)
, mResult(JS::UndefinedValue())
, mDone(false)
{
}
DOMRequest::~DOMRequest()
{
mResult.setUndefined();
mozilla::DropJSObjects(this);
}
NS_IMPL_CYCLE_COLLECTION_CLASS(DOMRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(DOMRequest,
DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mError)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPromise)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DOMRequest,
DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mError)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPromise)
tmp->mResult.setUndefined();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(DOMRequest,
DOMEventTargetHelper)
// Don't need NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER because
// DOMEventTargetHelper does it for us.
NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mResult)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(DOMRequest)
NS_INTERFACE_MAP_ENTRY(nsIDOMDOMRequest)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(DOMRequest, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(DOMRequest, DOMEventTargetHelper)
/* virtual */ JSObject*
DOMRequest::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return DOMRequestBinding::Wrap(aCx, this, aGivenProto);
}
NS_IMPL_EVENT_HANDLER(DOMRequest, success)
NS_IMPL_EVENT_HANDLER(DOMRequest, error)
NS_IMETHODIMP
DOMRequest::GetReadyState(nsAString& aReadyState)
{
DOMRequestReadyState readyState = ReadyState();
switch (readyState) {
case DOMRequestReadyState::Pending:
aReadyState.AssignLiteral("pending");
break;
case DOMRequestReadyState::Done:
aReadyState.AssignLiteral("done");
break;
default:
MOZ_CRASH("Unrecognized readyState.");
}
return NS_OK;
}
NS_IMETHODIMP
DOMRequest::GetResult(JS::MutableHandle<JS::Value> aResult)
{
GetResult(nullptr, aResult);
return NS_OK;
}
NS_IMETHODIMP
DOMRequest::GetError(nsISupports** aError)
{
NS_IF_ADDREF(*aError = GetError());
return NS_OK;
}
void
DOMRequest::FireSuccess(JS::Handle<JS::Value> aResult)
{
NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
NS_ASSERTION(!mError, "mError shouldn't have been set!");
NS_ASSERTION(mResult.isUndefined(), "mResult shouldn't have been set!");
mDone = true;
if (aResult.isGCThing()) {
RootResultVal();
}
mResult = aResult;
FireEvent(NS_LITERAL_STRING("success"), false, false);
if (mPromise) {
mPromise->MaybeResolve(mResult);
}
}
void
DOMRequest::FireError(const nsAString& aError)
{
NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
NS_ASSERTION(!mError, "mError shouldn't have been set!");
NS_ASSERTION(mResult.isUndefined(), "mResult shouldn't have been set!");
mDone = true;
mError = new DOMError(GetOwner(), aError);
FireEvent(NS_LITERAL_STRING("error"), true, true);
if (mPromise) {
mPromise->MaybeRejectBrokenly(mError);
}
}
void
DOMRequest::FireError(nsresult aError)
{
NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
NS_ASSERTION(!mError, "mError shouldn't have been set!");
NS_ASSERTION(mResult.isUndefined(), "mResult shouldn't have been set!");
mDone = true;
mError = new DOMError(GetOwner(), aError);
FireEvent(NS_LITERAL_STRING("error"), true, true);
if (mPromise) {
mPromise->MaybeRejectBrokenly(mError);
}
}
void
DOMRequest::FireDetailedError(DOMError* aError)
{
NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
NS_ASSERTION(!mError, "mError shouldn't have been set!");
NS_ASSERTION(mResult.isUndefined(), "mResult shouldn't have been set!");
NS_ASSERTION(aError, "No detailed error provided");
mDone = true;
mError = aError;
FireEvent(NS_LITERAL_STRING("error"), true, true);
if (mPromise) {
mPromise->MaybeRejectBrokenly(mError);
}
}
void
DOMRequest::FireEvent(const nsAString& aType, bool aBubble, bool aCancelable)
{
if (NS_FAILED(CheckInnerWindowCorrectness())) {
return;
}
RefPtr<Event> event = NS_NewDOMEvent(this, nullptr, nullptr);
event->InitEvent(aType, aBubble, aCancelable);
event->SetTrusted(true);
bool dummy;
DispatchEvent(event, &dummy);
}
void
DOMRequest::RootResultVal()
{
mozilla::HoldJSObjects(this);
}
void
DOMRequest::Then(JSContext* aCx, AnyCallback* aResolveCallback,
AnyCallback* aRejectCallback,
JS::MutableHandle<JS::Value> aRetval,
mozilla::ErrorResult& aRv)
{
if (!mPromise) {
mPromise = Promise::Create(DOMEventTargetHelper::GetParentObject(), aRv);
if (aRv.Failed()) {
return;
}
if (mDone) {
// Since we create mPromise lazily, it's possible that the DOMRequest object
// has already fired its success/error event. In that case we should
// manually resolve/reject mPromise here. mPromise will take care of
// calling the callbacks on |promise| as needed.
if (mError) {
mPromise->MaybeRejectBrokenly(mError);
} else {
mPromise->MaybeResolve(mResult);
}
}
}
// Just use the global of the Promise itself as the callee global.
JS::Rooted<JSObject*> global(aCx, mPromise->GetWrapper());
global = js::GetGlobalForObjectCrossCompartment(global);
mPromise->Then(aCx, global, aResolveCallback, aRejectCallback, aRetval, aRv);
}
NS_IMPL_ISUPPORTS(DOMRequestService, nsIDOMRequestService)
NS_IMETHODIMP
DOMRequestService::CreateRequest(nsIDOMWindow* aWindow,
nsIDOMDOMRequest** aRequest)
{
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(aWindow));
NS_ENSURE_STATE(win);
NS_ADDREF(*aRequest = new DOMRequest(win));
return NS_OK;
}
NS_IMETHODIMP
DOMRequestService::CreateCursor(nsIDOMWindow* aWindow,
nsICursorContinueCallback* aCallback,
nsIDOMDOMCursor** aCursor)
{
nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(aWindow));
NS_ENSURE_STATE(win);
NS_ADDREF(*aCursor = new DOMCursor(win, aCallback));
return NS_OK;
}
NS_IMETHODIMP
DOMRequestService::FireSuccess(nsIDOMDOMRequest* aRequest,
JS::Handle<JS::Value> aResult)
{
NS_ENSURE_STATE(aRequest);
static_cast<DOMRequest*>(aRequest)->FireSuccess(aResult);
return NS_OK;
}
NS_IMETHODIMP
DOMRequestService::FireError(nsIDOMDOMRequest* aRequest,
const nsAString& aError)
{
NS_ENSURE_STATE(aRequest);
static_cast<DOMRequest*>(aRequest)->FireError(aError);
return NS_OK;
}
NS_IMETHODIMP
DOMRequestService::FireDetailedError(nsIDOMDOMRequest* aRequest,
nsISupports* aError)
{
NS_ENSURE_STATE(aRequest);
nsCOMPtr<DOMError> err = do_QueryInterface(aError);
NS_ENSURE_STATE(err);
static_cast<DOMRequest*>(aRequest)->FireDetailedError(err);
return NS_OK;
}
class FireSuccessAsyncTask : public nsRunnable
{
FireSuccessAsyncTask(JSContext* aCx,
DOMRequest* aRequest,
const JS::Value& aResult) :
mReq(aRequest),
mResult(aCx, aResult)
{
}
public:
// Due to the fact that initialization can fail during shutdown (since we
// can't fetch a js context), set up an initiatization function to make sure
// we can return the failure appropriately
static nsresult
Dispatch(DOMRequest* aRequest,
const JS::Value& aResult)
{
mozilla::ThreadsafeAutoSafeJSContext cx;
RefPtr<FireSuccessAsyncTask> asyncTask = new FireSuccessAsyncTask(cx, aRequest, aResult);
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(NS_DispatchToCurrentThread(asyncTask)));
return NS_OK;
}
NS_IMETHODIMP
Run()
{
mReq->FireSuccess(JS::Handle<JS::Value>::fromMarkedLocation(mResult.address()));
return NS_OK;
}
private:
RefPtr<DOMRequest> mReq;
JS::PersistentRooted<JS::Value> mResult;
};
class FireErrorAsyncTask : public nsRunnable
{
public:
FireErrorAsyncTask(DOMRequest* aRequest,
const nsAString& aError) :
mReq(aRequest),
mError(aError)
{
}
NS_IMETHODIMP
Run()
{
mReq->FireError(mError);
return NS_OK;
}
private:
RefPtr<DOMRequest> mReq;
nsString mError;
};
NS_IMETHODIMP
DOMRequestService::FireSuccessAsync(nsIDOMDOMRequest* aRequest,
JS::Handle<JS::Value> aResult)
{
NS_ENSURE_STATE(aRequest);
return FireSuccessAsyncTask::Dispatch(static_cast<DOMRequest*>(aRequest), aResult);
}
NS_IMETHODIMP
DOMRequestService::FireErrorAsync(nsIDOMDOMRequest* aRequest,
const nsAString& aError)
{
NS_ENSURE_STATE(aRequest);
nsCOMPtr<nsIRunnable> asyncTask =
new FireErrorAsyncTask(static_cast<DOMRequest*>(aRequest), aError);
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(NS_DispatchToCurrentThread(asyncTask)));
return NS_OK;
}
NS_IMETHODIMP
DOMRequestService::FireDone(nsIDOMDOMCursor* aCursor) {
NS_ENSURE_STATE(aCursor);
static_cast<DOMCursor*>(aCursor)->FireDone();
return NS_OK;
}