gecko-dev/dom/file/FileRequest.cpp

179 строки
4.8 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 "FileRequest.h"
#include "nsIJSContextStack.h"
#include "nsContentUtils.h"
#include "nsEventDispatcher.h"
#include "nsError.h"
#include "nsDOMProgressEvent.h"
#include "nsDOMClassInfoID.h"
#include "FileHelper.h"
#include "LockedFile.h"
USING_FILE_NAMESPACE
FileRequest::FileRequest(nsIDOMWindow* aWindow)
: DOMRequest(aWindow), mIsFileRequest(true)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
}
FileRequest::~FileRequest()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
}
// static
already_AddRefed<FileRequest>
FileRequest::Create(nsIDOMWindow* aOwner,
LockedFile* aLockedFile,
bool aIsFileRequest)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsRefPtr<FileRequest> request = new FileRequest(aOwner);
request->mLockedFile = aLockedFile;
request->mIsFileRequest = aIsFileRequest;
return request.forget();
}
nsresult
FileRequest::PreHandleEvent(nsEventChainPreVisitor& aVisitor)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
aVisitor.mCanHandle = true;
aVisitor.mParentTarget = mLockedFile;
return NS_OK;
}
nsresult
FileRequest::NotifyHelperCompleted(FileHelper* aFileHelper)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsresult rv = aFileHelper->mResultCode;
// 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.
jsval result;
nsIScriptContext* sc = GetContextForEventHandlers(&rv);
NS_ENSURE_STATE(sc);
JSContext* cx = sc->GetNativeContext();
NS_ASSERTION(cx, "Failed to get a context!");
JSObject* global = sc->GetNativeGlobal();
NS_ASSERTION(global, "Failed to get global object!");
JSAutoRequest ar(cx);
JSAutoEnterCompartment ac;
if (ac.enter(cx, global)) {
rv = aFileHelper->GetSuccessResult(cx, &result);
if (NS_FAILED(rv)) {
NS_WARNING("GetSuccessResult failed!");
}
}
else {
NS_WARNING("Failed to enter correct compartment!");
rv = NS_ERROR_DOM_FILEHANDLE_UNKNOWN_ERR;
}
if (NS_SUCCEEDED(rv)) {
FireSuccess(result);
}
else {
FireError(rv);
}
return NS_OK;
}
NS_IMETHODIMP
FileRequest::GetLockedFile(nsIDOMLockedFile** aLockedFile)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsCOMPtr<nsIDOMLockedFile> lockedFile(mLockedFile);
lockedFile.forget(aLockedFile);
return NS_OK;
}
NS_IMPL_CYCLE_COLLECTION_CLASS(FileRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(FileRequest, DOMRequest)
// Don't need NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS because
// nsDOMEventTargetHelper does it for us.
NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(progress)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR_AMBIGUOUS(mLockedFile,
nsIDOMLockedFile)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(FileRequest, DOMRequest)
NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(progress)
NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLockedFile)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(FileRequest)
NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIDOMFileRequest, mIsFileRequest)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO_CONDITIONAL(FileRequest, mIsFileRequest)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO_CONDITIONAL(DOMRequest, !mIsFileRequest)
NS_INTERFACE_MAP_END_INHERITING(DOMRequest)
NS_IMPL_ADDREF_INHERITED(FileRequest, DOMRequest)
NS_IMPL_RELEASE_INHERITED(FileRequest, DOMRequest)
DOMCI_DATA(FileRequest, FileRequest)
NS_IMPL_EVENT_HANDLER(FileRequest, progress)
void
FileRequest::FireProgressEvent(PRUint64 aLoaded, PRUint64 aTotal)
{
if (NS_FAILED(CheckInnerWindowCorrectness())) {
return;
}
nsRefPtr<nsDOMProgressEvent> event = new nsDOMProgressEvent(nullptr, nullptr);
nsresult rv = event->InitProgressEvent(NS_LITERAL_STRING("progress"),
false, false, false, aLoaded, aTotal);
if (NS_FAILED(rv)) {
return;
}
rv = event->SetTrusted(true);
if (NS_FAILED(rv)) {
return;
}
bool dummy;
rv = DispatchEvent(static_cast<nsIDOMProgressEvent*>(event), &dummy);
if (NS_FAILED(rv)) {
return;
}
}
void
FileRequest::RootResultVal()
{
NS_ASSERTION(!mRooted, "Don't call me if already rooted!");
nsXPCOMCycleCollectionParticipant *participant;
CallQueryInterface(this, &participant);
nsContentUtils::HoldJSObjects(NS_CYCLE_COLLECTION_UPCAST(this, DOMRequest),
participant);
mRooted = true;
}