gecko-dev/dom/filesystem/FileSystemTaskBase.cpp

238 строки
6.1 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 "mozilla/dom/FileSystemTaskBase.h"
#include "nsNetCID.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/FileSystemBase.h"
#include "mozilla/dom/FileSystemRequestParent.h"
#include "mozilla/dom/FileSystemUtils.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/PContent.h"
#include "mozilla/dom/ipc/BlobParent.h"
#include "mozilla/unused.h"
namespace mozilla {
namespace dom {
FileSystemTaskBase::FileSystemTaskBase(FileSystemBase* aFileSystem)
: mErrorValue(NS_OK)
, mFileSystem(aFileSystem)
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
MOZ_ASSERT(aFileSystem, "aFileSystem should not be null.");
}
FileSystemTaskBase::FileSystemTaskBase(FileSystemBase* aFileSystem,
const FileSystemParams& aParam,
FileSystemRequestParent* aParent)
: mErrorValue(NS_OK)
, mFileSystem(aFileSystem)
, mRequestParent(aParent)
{
MOZ_ASSERT(XRE_IsParentProcess(),
"Only call from parent process!");
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
MOZ_ASSERT(aFileSystem, "aFileSystem should not be null.");
}
FileSystemTaskBase::~FileSystemTaskBase()
{
}
FileSystemBase*
FileSystemTaskBase::GetFileSystem() const
{
return mFileSystem.get();
}
void
FileSystemTaskBase::Start()
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
if (HasError()) {
NS_DispatchToMainThread(this);
return;
}
if (XRE_IsParentProcess()) {
// Run in parent process.
// Start worker thread.
nsCOMPtr<nsIEventTarget> target
= do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
NS_ASSERTION(target, "Must have stream transport service.");
target->Dispatch(this, NS_DISPATCH_NORMAL);
return;
}
// Run in child process.
if (mFileSystem->IsShutdown()) {
return;
}
// Retain a reference so the task object isn't deleted without IPDL's
// knowledge. The reference will be released by
// mozilla::dom::ContentChild::DeallocPFileSystemRequestChild.
NS_ADDREF_THIS();
ContentChild::GetSingleton()->SendPFileSystemRequestConstructor(this,
GetRequestParams(mFileSystem->ToString()));
}
NS_IMETHODIMP
FileSystemTaskBase::Run()
{
if (!NS_IsMainThread()) {
// Run worker thread tasks
nsresult rv = Work();
if (NS_FAILED(rv)) {
SetError(rv);
}
// Dispatch itself to main thread
NS_DispatchToMainThread(this);
return NS_OK;
}
// Run main thread tasks
HandleResult();
return NS_OK;
}
void
FileSystemTaskBase::HandleResult()
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
if (mFileSystem->IsShutdown()) {
return;
}
if (mRequestParent && mRequestParent->IsRunning()) {
Unused << mRequestParent->Send__delete__(mRequestParent,
GetRequestResult());
} else {
HandlerCallback();
}
}
FileSystemResponseValue
FileSystemTaskBase::GetRequestResult() const
{
MOZ_ASSERT(XRE_IsParentProcess(),
"Only call from parent process!");
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
if (HasError()) {
return FileSystemErrorResponse(mErrorValue);
} else {
return GetSuccessRequestResult();
}
}
void
FileSystemTaskBase::SetRequestResult(const FileSystemResponseValue& aValue)
{
MOZ_ASSERT(!XRE_IsParentProcess(),
"Only call from child process!");
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
if (aValue.type() == FileSystemResponseValue::TFileSystemErrorResponse) {
FileSystemErrorResponse r = aValue;
mErrorValue = r.error();
} else {
SetSuccessRequestResult(aValue);
}
}
bool
FileSystemTaskBase::Recv__delete__(const FileSystemResponseValue& aValue)
{
SetRequestResult(aValue);
HandlerCallback();
return true;
}
BlobParent*
FileSystemTaskBase::GetBlobParent(BlobImpl* aFile) const
{
MOZ_ASSERT(XRE_IsParentProcess(),
"Only call from parent process!");
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
MOZ_ASSERT(aFile);
// Load the lazy dom file data from the parent before sending to the child.
nsString mimeType;
aFile->GetType(mimeType);
// We call GetSize and GetLastModified to prepopulate the value in the
// BlobImpl.
{
ErrorResult rv;
aFile->GetSize(rv);
rv.SuppressException();
}
{
ErrorResult rv;
aFile->GetLastModified(rv);
rv.SuppressException();
}
ContentParent* cp = static_cast<ContentParent*>(mRequestParent->Manager());
return cp->GetOrCreateActorForBlobImpl(aFile);
}
void
FileSystemTaskBase::SetError(const nsresult& aErrorValue)
{
uint16_t module = NS_ERROR_GET_MODULE(aErrorValue);
if (module == NS_ERROR_MODULE_DOM_FILESYSTEM ||
module == NS_ERROR_MODULE_DOM_FILE ||
module == NS_ERROR_MODULE_DOM) {
mErrorValue = aErrorValue;
return;
}
switch (aErrorValue) {
case NS_OK:
mErrorValue = NS_OK;
return;
case NS_ERROR_FILE_INVALID_PATH:
case NS_ERROR_FILE_UNRECOGNIZED_PATH:
mErrorValue = NS_ERROR_DOM_FILESYSTEM_INVALID_PATH_ERR;
return;
case NS_ERROR_FILE_DESTINATION_NOT_DIR:
mErrorValue = NS_ERROR_DOM_FILESYSTEM_INVALID_MODIFICATION_ERR;
return;
case NS_ERROR_FILE_ACCESS_DENIED:
case NS_ERROR_FILE_DIR_NOT_EMPTY:
mErrorValue = NS_ERROR_DOM_FILESYSTEM_NO_MODIFICATION_ALLOWED_ERR;
return;
case NS_ERROR_FILE_TARGET_DOES_NOT_EXIST:
case NS_ERROR_NOT_AVAILABLE:
mErrorValue = NS_ERROR_DOM_FILE_NOT_FOUND_ERR;
return;
case NS_ERROR_FILE_ALREADY_EXISTS:
mErrorValue = NS_ERROR_DOM_FILESYSTEM_PATH_EXISTS_ERR;
return;
case NS_ERROR_FILE_NOT_DIRECTORY:
mErrorValue = NS_ERROR_DOM_FILESYSTEM_TYPE_MISMATCH_ERR;
return;
case NS_ERROR_UNEXPECTED:
default:
mErrorValue = NS_ERROR_DOM_FILESYSTEM_UNKNOWN_ERR;
return;
}
}
} // namespace dom
} // namespace mozilla