gecko-dev/dom/archivereader/ArchiveRequest.cpp

278 строки
6.2 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 "ArchiveRequest.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/dom/ArchiveRequestBinding.h"
#include "mozilla/dom/ScriptSettings.h"
#include "nsContentUtils.h"
using namespace mozilla;
USING_ARCHIVEREADER_NAMESPACE
/**
* Class used to make asynchronous the ArchiveRequest.
*/
class ArchiveRequestEvent : public nsRunnable
{
public:
NS_DECL_NSIRUNNABLE
ArchiveRequestEvent(ArchiveRequest* request)
: mRequest(request)
{
MOZ_COUNT_CTOR(ArchiveRequestEvent);
}
protected:
~ArchiveRequestEvent()
{
MOZ_COUNT_DTOR(ArchiveRequestEvent);
}
private: //data
nsRefPtr<ArchiveRequest> mRequest;
};
NS_IMETHODIMP
ArchiveRequestEvent::Run()
{
NS_ABORT_IF_FALSE(mRequest, "the request is not longer valid");
mRequest->Run();
return NS_OK;
}
// ArchiveRequest
ArchiveRequest::ArchiveRequest(nsPIDOMWindow* aWindow,
ArchiveReader* aReader)
: DOMRequest(aWindow),
mArchiveReader(aReader)
{
MOZ_ASSERT(aReader);
MOZ_COUNT_CTOR(ArchiveRequest);
/* An event to make this request asynchronous: */
nsRefPtr<ArchiveRequestEvent> event = new ArchiveRequestEvent(this);
NS_DispatchToCurrentThread(event);
}
ArchiveRequest::~ArchiveRequest()
{
MOZ_COUNT_DTOR(ArchiveRequest);
}
nsresult
ArchiveRequest::PreHandleEvent(EventChainPreVisitor& aVisitor)
{
aVisitor.mCanHandle = true;
aVisitor.mParentTarget = nullptr;
return NS_OK;
}
/* virtual */ JSObject*
ArchiveRequest::WrapObject(JSContext* aCx)
{
return ArchiveRequestBinding::Wrap(aCx, this);
}
ArchiveReader*
ArchiveRequest::Reader() const
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
return mArchiveReader;
}
// Here the request is processed:
void
ArchiveRequest::Run()
{
// Register this request to the reader.
// When the reader is ready to return data, a 'Ready()' will be called
nsresult rv = mArchiveReader->RegisterRequest(this);
if (NS_FAILED(rv)) {
FireError(rv);
}
}
void
ArchiveRequest::OpGetFilenames()
{
mOperation = GetFilenames;
}
void
ArchiveRequest::OpGetFile(const nsAString& aFilename)
{
mOperation = GetFile;
mFilename = aFilename;
}
void
ArchiveRequest::OpGetFiles()
{
mOperation = GetFiles;
}
nsresult
ArchiveRequest::ReaderReady(nsTArray<nsCOMPtr<nsIDOMFile> >& aFileList,
nsresult aStatus)
{
if (NS_FAILED(aStatus)) {
FireError(aStatus);
return NS_OK;
}
nsresult rv;
AutoJSAPI jsapi;
if (NS_WARN_IF(!jsapi.Init(GetOwner()))) {
return NS_ERROR_UNEXPECTED;
}
JSContext* cx = jsapi.cx();
JS::Rooted<JS::Value> result(cx);
switch (mOperation) {
case GetFilenames:
rv = GetFilenamesResult(cx, result.address(), aFileList);
break;
case GetFile:
rv = GetFileResult(cx, &result, aFileList);
break;
case GetFiles:
rv = GetFilesResult(cx, &result, aFileList);
break;
default:
rv = NS_ERROR_UNEXPECTED;
break;
}
if (NS_FAILED(rv)) {
NS_WARNING("Get*Result failed!");
}
if (NS_SUCCEEDED(rv)) {
FireSuccess(result);
}
else {
FireError(rv);
}
return NS_OK;
}
nsresult
ArchiveRequest::GetFilenamesResult(JSContext* aCx,
JS::Value* aValue,
nsTArray<nsCOMPtr<nsIDOMFile> >& aFileList)
{
JS::Rooted<JSObject*> array(aCx, JS_NewArrayObject(aCx, aFileList.Length()));
nsresult rv;
if (!array) {
return NS_ERROR_OUT_OF_MEMORY;
}
JS::Rooted<JSString*> str(aCx);
for (uint32_t i = 0; i < aFileList.Length(); ++i) {
nsCOMPtr<nsIDOMFile> file = aFileList[i];
nsString filename;
rv = file->GetName(filename);
NS_ENSURE_SUCCESS(rv, rv);
str = JS_NewUCStringCopyZ(aCx, filename.get());
NS_ENSURE_TRUE(str, NS_ERROR_OUT_OF_MEMORY);
if (NS_FAILED(rv) ||
!JS_DefineElement(aCx, array, i, str, JSPROP_ENUMERATE)) {
return NS_ERROR_FAILURE;
}
}
if (!JS_FreezeObject(aCx, array)) {
return NS_ERROR_FAILURE;
}
*aValue = OBJECT_TO_JSVAL(array);
return NS_OK;
}
nsresult
ArchiveRequest::GetFileResult(JSContext* aCx,
JS::MutableHandle<JS::Value> aValue,
nsTArray<nsCOMPtr<nsIDOMFile> >& aFileList)
{
for (uint32_t i = 0; i < aFileList.Length(); ++i) {
nsCOMPtr<nsIDOMFile> file = aFileList[i];
nsString filename;
nsresult rv = file->GetName(filename);
NS_ENSURE_SUCCESS(rv, rv);
if (filename == mFilename) {
return nsContentUtils::WrapNative(aCx, file, &NS_GET_IID(nsIDOMFile),
aValue);
}
}
return NS_ERROR_FAILURE;
}
nsresult
ArchiveRequest::GetFilesResult(JSContext* aCx,
JS::MutableHandle<JS::Value> aValue,
nsTArray<nsCOMPtr<nsIDOMFile> >& aFileList)
{
JS::Rooted<JSObject*> array(aCx, JS_NewArrayObject(aCx, aFileList.Length()));
if (!array) {
return NS_ERROR_OUT_OF_MEMORY;
}
for (uint32_t i = 0; i < aFileList.Length(); ++i) {
nsCOMPtr<nsIDOMFile> file = aFileList[i];
JS::Rooted<JS::Value> value(aCx);
nsresult rv = nsContentUtils::WrapNative(aCx, file, &NS_GET_IID(nsIDOMFile),
&value);
if (NS_FAILED(rv) ||
!JS_DefineElement(aCx, array, i, value, JSPROP_ENUMERATE)) {
return NS_ERROR_FAILURE;
}
}
aValue.setObject(*array);
return NS_OK;
}
// static
already_AddRefed<ArchiveRequest>
ArchiveRequest::Create(nsPIDOMWindow* aOwner,
ArchiveReader* aReader)
{
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsRefPtr<ArchiveRequest> request = new ArchiveRequest(aOwner, aReader);
return request.forget();
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(ArchiveRequest, DOMRequest,
mArchiveReader)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(ArchiveRequest)
NS_INTERFACE_MAP_END_INHERITING(DOMRequest)
NS_IMPL_ADDREF_INHERITED(ArchiveRequest, DOMRequest)
NS_IMPL_RELEASE_INHERITED(ArchiveRequest, DOMRequest)