gecko-dev/dom/indexedDB/IDBFileRequest.cpp

159 строки
3.8 KiB
C++

/* -*- 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 "IDBFileRequest.h"
#include "IDBFileHandle.h"
#include "js/RootingAPI.h"
#include "jsapi.h"
#include "MainThreadUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/dom/FileHelper.h"
#include "mozilla/dom/IDBFileRequestBinding.h"
#include "mozilla/dom/ProgressEvent.h"
#include "mozilla/EventDispatcher.h"
#include "nsCOMPtr.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsIDOMEvent.h"
#include "nsIScriptContext.h"
#include "nsLiteralString.h"
namespace mozilla {
namespace dom {
namespace indexedDB {
IDBFileRequest::IDBFileRequest(nsPIDOMWindow* aWindow)
: DOMRequest(aWindow), mWrapAsDOMRequest(false)
{
}
IDBFileRequest::~IDBFileRequest()
{
}
// static
already_AddRefed<IDBFileRequest>
IDBFileRequest::Create(nsPIDOMWindow* aOwner, IDBFileHandle* aFileHandle,
bool aWrapAsDOMRequest)
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
nsRefPtr<IDBFileRequest> request = new IDBFileRequest(aOwner);
request->mFileHandle = aFileHandle;
request->mWrapAsDOMRequest = aWrapAsDOMRequest;
return request.forget();
}
nsresult
IDBFileRequest::PreHandleEvent(EventChainPreVisitor& aVisitor)
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
aVisitor.mCanHandle = true;
aVisitor.mParentTarget = mFileHandle;
return NS_OK;
}
void
IDBFileRequest::OnProgress(uint64_t aProgress, uint64_t aProgressMax)
{
FireProgressEvent(aProgress, aProgressMax);
}
nsresult
IDBFileRequest::NotifyHelperCompleted(FileHelper* aFileHelper)
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
nsresult rv = aFileHelper->ResultCode();
// If the request failed then fire error event and return.
if (NS_FAILED(rv)) {
FireError(rv);
return NS_OK;
}
// Otherwise we need to get the result from the helper.
nsIScriptContext* sc = GetContextForEventHandlers(&rv);
NS_ENSURE_STATE(sc);
AutoJSContext cx;
MOZ_ASSERT(cx, "Failed to get a context!");
JS::Rooted<JS::Value> result(cx);
JS::Rooted<JSObject*> global(cx, sc->GetWindowProxy());
MOZ_ASSERT(global, "Failed to get global object!");
JSAutoCompartment ac(cx, global);
rv = aFileHelper->GetSuccessResult(cx, &result);
if (NS_FAILED(rv)) {
NS_WARNING("GetSuccessResult failed!");
}
if (NS_SUCCEEDED(rv)) {
FireSuccess(result);
}
else {
FireError(rv);
}
return NS_OK;
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(IDBFileRequest, DOMRequest,
mFileHandle)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(IDBFileRequest)
NS_INTERFACE_MAP_END_INHERITING(DOMRequest)
NS_IMPL_ADDREF_INHERITED(IDBFileRequest, DOMRequest)
NS_IMPL_RELEASE_INHERITED(IDBFileRequest, DOMRequest)
// virtual
JSObject*
IDBFileRequest::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
if (mWrapAsDOMRequest) {
return DOMRequest::WrapObject(aCx, aGivenProto);
}
return IDBFileRequestBinding::Wrap(aCx, this, aGivenProto);
}
IDBFileHandle*
IDBFileRequest::GetFileHandle() const
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
return static_cast<IDBFileHandle*>(mFileHandle.get());
}
void
IDBFileRequest::FireProgressEvent(uint64_t aLoaded, uint64_t aTotal)
{
if (NS_FAILED(CheckInnerWindowCorrectness())) {
return;
}
ProgressEventInit init;
init.mBubbles = false;
init.mCancelable = false;
init.mLengthComputable = false;
init.mLoaded = aLoaded;
init.mTotal = aTotal;
nsRefPtr<ProgressEvent> event =
ProgressEvent::Constructor(this, NS_LITERAL_STRING("progress"), init);
DispatchTrustedEvent(event);
}
} // namespace indexedDB
} // namespace dom
} // namespace mozilla