gecko-dev/dom/file/FileRequest.cpp

157 lines
4.1 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 "nsIDOMProgressEvent.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);
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_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)
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_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(uint64_t aLoaded, uint64_t aTotal)
{
if (NS_FAILED(CheckInnerWindowCorrectness())) {
return;
}
nsCOMPtr<nsIDOMEvent> event;
nsresult rv = NS_NewDOMProgressEvent(getter_AddRefs(event), 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);
}