mirror of
https://github.com/mozilla/gecko-dev.git
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345 lines
8.8 KiB
C++
345 lines
8.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "DOMRequest.h"
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#include "DOMError.h"
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#include "nsCxPusher.h"
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#include "nsThreadUtils.h"
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#include "DOMCursor.h"
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#include "nsIDOMEvent.h"
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using mozilla::dom::DOMRequest;
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using mozilla::dom::DOMRequestService;
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using mozilla::dom::DOMCursor;
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using mozilla::AutoSafeJSContext;
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DOMRequest::DOMRequest(nsPIDOMWindow* aWindow)
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: nsDOMEventTargetHelper(aWindow->IsInnerWindow() ?
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aWindow : aWindow->GetCurrentInnerWindow())
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, mResult(JSVAL_VOID)
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, mDone(false)
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{
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(DOMRequest)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(DOMRequest,
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nsDOMEventTargetHelper)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mError)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DOMRequest,
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nsDOMEventTargetHelper)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mError)
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tmp->mResult = JSVAL_VOID;
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(DOMRequest,
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nsDOMEventTargetHelper)
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// Don't need NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER because
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// nsDOMEventTargetHelper does it for us.
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NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mResult)
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(DOMRequest)
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NS_INTERFACE_MAP_ENTRY(nsIDOMDOMRequest)
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NS_INTERFACE_MAP_END_INHERITING(nsDOMEventTargetHelper)
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NS_IMPL_ADDREF_INHERITED(DOMRequest, nsDOMEventTargetHelper)
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NS_IMPL_RELEASE_INHERITED(DOMRequest, nsDOMEventTargetHelper)
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/* virtual */ JSObject*
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DOMRequest::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aScope)
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{
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return DOMRequestBinding::Wrap(aCx, aScope, this);
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}
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NS_IMPL_EVENT_HANDLER(DOMRequest, success)
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NS_IMPL_EVENT_HANDLER(DOMRequest, error)
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NS_IMETHODIMP
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DOMRequest::GetReadyState(nsAString& aReadyState)
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{
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DOMRequestReadyState readyState = ReadyState();
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switch (readyState) {
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case DOMRequestReadyState::Pending:
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aReadyState.AssignLiteral("pending");
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break;
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case DOMRequestReadyState::Done:
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aReadyState.AssignLiteral("done");
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break;
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default:
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MOZ_CRASH("Unrecognized readyState.");
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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DOMRequest::GetResult(JS::MutableHandle<JS::Value> aResult)
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{
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aResult.set(Result());
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return NS_OK;
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}
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NS_IMETHODIMP
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DOMRequest::GetError(nsISupports** aError)
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{
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NS_IF_ADDREF(*aError = GetError());
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return NS_OK;
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}
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void
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DOMRequest::FireSuccess(JS::Handle<JS::Value> aResult)
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{
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NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
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NS_ASSERTION(!mError, "mError shouldn't have been set!");
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NS_ASSERTION(mResult == JSVAL_VOID, "mResult shouldn't have been set!");
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mDone = true;
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if (JSVAL_IS_GCTHING(aResult)) {
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RootResultVal();
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}
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mResult = aResult;
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FireEvent(NS_LITERAL_STRING("success"), false, false);
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}
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void
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DOMRequest::FireError(const nsAString& aError)
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{
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NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
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NS_ASSERTION(!mError, "mError shouldn't have been set!");
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NS_ASSERTION(mResult == JSVAL_VOID, "mResult shouldn't have been set!");
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mDone = true;
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mError = new DOMError(GetOwner(), aError);
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FireEvent(NS_LITERAL_STRING("error"), true, true);
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}
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void
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DOMRequest::FireError(nsresult aError)
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{
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NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
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NS_ASSERTION(!mError, "mError shouldn't have been set!");
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NS_ASSERTION(mResult == JSVAL_VOID, "mResult shouldn't have been set!");
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mDone = true;
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mError = new DOMError(GetOwner(), aError);
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FireEvent(NS_LITERAL_STRING("error"), true, true);
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}
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void
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DOMRequest::FireDetailedError(nsISupports* aError)
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{
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NS_ASSERTION(!mDone, "mDone shouldn't have been set to true already!");
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NS_ASSERTION(!mError, "mError shouldn't have been set!");
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NS_ASSERTION(mResult == JSVAL_VOID, "mResult shouldn't have been set!");
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NS_ASSERTION(aError, "No detailed error provided");
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mDone = true;
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mError = aError;
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FireEvent(NS_LITERAL_STRING("error"), true, true);
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}
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void
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DOMRequest::FireEvent(const nsAString& aType, bool aBubble, bool aCancelable)
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{
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if (NS_FAILED(CheckInnerWindowCorrectness())) {
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return;
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}
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nsCOMPtr<nsIDOMEvent> event;
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NS_NewDOMEvent(getter_AddRefs(event), this, nullptr, nullptr);
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nsresult rv = event->InitEvent(aType, aBubble, aCancelable);
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if (NS_FAILED(rv)) {
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return;
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}
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event->SetTrusted(true);
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bool dummy;
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DispatchEvent(event, &dummy);
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}
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void
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DOMRequest::RootResultVal()
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{
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mozilla::HoldJSObjects(this);
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}
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NS_IMPL_ISUPPORTS1(DOMRequestService, nsIDOMRequestService)
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NS_IMETHODIMP
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DOMRequestService::CreateRequest(nsIDOMWindow* aWindow,
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nsIDOMDOMRequest** aRequest)
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{
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nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(aWindow));
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NS_ENSURE_STATE(win);
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NS_ADDREF(*aRequest = new DOMRequest(win));
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return NS_OK;
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}
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NS_IMETHODIMP
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DOMRequestService::CreateCursor(nsIDOMWindow* aWindow,
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nsICursorContinueCallback* aCallback,
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nsIDOMDOMCursor** aCursor)
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{
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nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(aWindow));
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NS_ENSURE_STATE(win);
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NS_ADDREF(*aCursor = new DOMCursor(win, aCallback));
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return NS_OK;
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}
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NS_IMETHODIMP
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DOMRequestService::FireSuccess(nsIDOMDOMRequest* aRequest,
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JS::Handle<JS::Value> aResult)
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{
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NS_ENSURE_STATE(aRequest);
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static_cast<DOMRequest*>(aRequest)->FireSuccess(aResult);
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return NS_OK;
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}
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NS_IMETHODIMP
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DOMRequestService::FireError(nsIDOMDOMRequest* aRequest,
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const nsAString& aError)
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{
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NS_ENSURE_STATE(aRequest);
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static_cast<DOMRequest*>(aRequest)->FireError(aError);
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return NS_OK;
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}
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NS_IMETHODIMP
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DOMRequestService::FireDetailedError(nsIDOMDOMRequest* aRequest,
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nsISupports* aError)
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{
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NS_ENSURE_STATE(aRequest);
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static_cast<DOMRequest*>(aRequest)->FireDetailedError(aError);
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return NS_OK;
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}
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class FireSuccessAsyncTask : public nsRunnable
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{
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FireSuccessAsyncTask(DOMRequest* aRequest,
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const JS::Value& aResult) :
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mReq(aRequest),
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mResult(aResult),
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mIsSetup(false)
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{
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}
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public:
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void
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Setup()
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{
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AutoSafeJSContext cx;
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JS_AddValueRoot(cx, &mResult);
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mIsSetup = true;
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}
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// Due to the fact that initialization can fail during shutdown (since we
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// can't fetch a js context), set up an initiatization function to make sure
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// we can return the failure appropriately
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static nsresult
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Dispatch(DOMRequest* aRequest,
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const JS::Value& aResult)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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nsRefPtr<FireSuccessAsyncTask> asyncTask = new FireSuccessAsyncTask(aRequest, aResult);
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asyncTask->Setup();
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if (NS_FAILED(NS_DispatchToMainThread(asyncTask))) {
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NS_WARNING("Failed to dispatch to main thread!");
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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Run()
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{
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mReq->FireSuccess(JS::Handle<JS::Value>::fromMarkedLocation(&mResult));
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return NS_OK;
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}
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~FireSuccessAsyncTask()
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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if(!mIsSetup) {
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// If we never set up, no reason to unroot
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return;
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}
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AutoSafeJSContext cx;
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JS_RemoveValueRoot(cx, &mResult);
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}
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private:
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nsRefPtr<DOMRequest> mReq;
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JS::Value mResult;
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bool mIsSetup;
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};
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class FireErrorAsyncTask : public nsRunnable
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{
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public:
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FireErrorAsyncTask(DOMRequest* aRequest,
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const nsAString& aError) :
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mReq(aRequest),
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mError(aError)
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{
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}
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NS_IMETHODIMP
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Run()
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{
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mReq->FireError(mError);
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return NS_OK;
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}
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private:
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nsRefPtr<DOMRequest> mReq;
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nsString mError;
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};
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NS_IMETHODIMP
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DOMRequestService::FireSuccessAsync(nsIDOMDOMRequest* aRequest,
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JS::Handle<JS::Value> aResult)
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{
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NS_ENSURE_STATE(aRequest);
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return FireSuccessAsyncTask::Dispatch(static_cast<DOMRequest*>(aRequest), aResult);
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}
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NS_IMETHODIMP
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DOMRequestService::FireErrorAsync(nsIDOMDOMRequest* aRequest,
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const nsAString& aError)
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{
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NS_ENSURE_STATE(aRequest);
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nsCOMPtr<nsIRunnable> asyncTask =
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new FireErrorAsyncTask(static_cast<DOMRequest*>(aRequest), aError);
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if (NS_FAILED(NS_DispatchToMainThread(asyncTask))) {
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NS_WARNING("Failed to dispatch to main thread!");
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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DOMRequestService::FireDone(nsIDOMDOMCursor* aCursor) {
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NS_ENSURE_STATE(aCursor);
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static_cast<DOMCursor*>(aCursor)->FireDone();
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return NS_OK;
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}
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