gecko-dev/dom/filehandle/FileRequest.cpp

158 строки
3.8 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 "FileHelper.h"
#include "js/RootingAPI.h"
#include "jsapi.h"
#include "LockedFile.h"
#include "MainThreadUtils.h"
#include "mozilla/dom/FileRequestBinding.h"
#include "mozilla/EventDispatcher.h"
#include "nsCOMPtr.h"
#include "nsCxPusher.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsIDOMEvent.h"
#include "nsIDOMProgressEvent.h"
#include "nsIScriptContext.h"
#include "nsLiteralString.h"
namespace mozilla {
namespace dom {
FileRequest::FileRequest(nsPIDOMWindow* aWindow)
: DOMRequest(aWindow), mWrapAsDOMRequest(false)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
}
FileRequest::~FileRequest()
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
}
// static
already_AddRefed<FileRequest>
FileRequest::Create(nsPIDOMWindow* aOwner, LockedFile* aLockedFile,
bool aWrapAsDOMRequest)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsRefPtr<FileRequest> request = new FileRequest(aOwner);
request->mLockedFile = aLockedFile;
request->mWrapAsDOMRequest = aWrapAsDOMRequest;
return request.forget();
}
nsresult
FileRequest::PreHandleEvent(EventChainPreVisitor& 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.
nsIScriptContext* sc = GetContextForEventHandlers(&rv);
NS_ENSURE_STATE(sc);
AutoJSContext cx;
NS_ASSERTION(cx, "Failed to get a context!");
JS::Rooted<JS::Value> result(cx);
JS::Rooted<JSObject*> global(cx, sc->GetWindowProxy());
NS_ASSERTION(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(FileRequest, DOMRequest,
mLockedFile)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(FileRequest)
NS_INTERFACE_MAP_END_INHERITING(DOMRequest)
NS_IMPL_ADDREF_INHERITED(FileRequest, DOMRequest)
NS_IMPL_RELEASE_INHERITED(FileRequest, DOMRequest)
// virtual
JSObject*
FileRequest::WrapObject(JSContext* aCx)
{
if (mWrapAsDOMRequest) {
return DOMRequest::WrapObject(aCx);
}
return FileRequestBinding::Wrap(aCx, this);
}
LockedFile*
FileRequest::GetLockedFile() const
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
return mLockedFile;
}
void
FileRequest::FireProgressEvent(uint64_t aLoaded, uint64_t aTotal)
{
if (NS_FAILED(CheckInnerWindowCorrectness())) {
return;
}
nsCOMPtr<nsIDOMEvent> event;
nsresult rv = NS_NewDOMProgressEvent(getter_AddRefs(event), this,
nullptr, nullptr);
if (NS_FAILED(rv)) {
return;
}
nsCOMPtr<nsIDOMProgressEvent> progress = do_QueryInterface(event);
MOZ_ASSERT(progress);
rv = progress->InitProgressEvent(NS_LITERAL_STRING("progress"), false, false,
false, aLoaded, aTotal);
if (NS_FAILED(rv)) {
return;
}
DispatchTrustedEvent(event);
}
} // namespace dom
} // namespace mozilla