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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/chromeos/cros/burn_library.h"
#include <cstring>
#include "base/memory/linked_ptr.h"
#include "chrome/browser/chromeos/cros/cros_library.h"
#include "content/browser/browser_thread.h"
namespace chromeos {
class BurnLibraryImpl : public BurnLibrary,
public base::SupportsWeakPtr<BurnLibraryImpl> {
public:
BurnLibraryImpl();
virtual ~BurnLibraryImpl();
// BurnLibrary implementation.
virtual void AddObserver(Observer* observer);
virtual void RemoveObserver(Observer* observer);
virtual bool DoBurn(const FilePath& from_path, const FilePath& to_path);
bool BurnImage(const FilePath& from_path, const FilePath& to_path);
void UpdateBurnStatus(const ImageBurnStatus& status, BurnEventType evt);
private:
void Init();
static void BurnStatusChangedHandler(void* object,
const BurnStatus& status,
BurnEventType evt);
private:
ObserverList<BurnLibrary::Observer> observers_;
BurnStatusConnection burn_status_connection_;
// Holds a path that is currently being burnt to.
std::string target_path_;
DISALLOW_COPY_AND_ASSIGN(BurnLibraryImpl);
};
class BurnLibraryTaskProxy
: public base::RefCountedThreadSafe<BurnLibraryTaskProxy> {
public:
explicit BurnLibraryTaskProxy(const base::WeakPtr<BurnLibraryImpl>& library);
void BurnImage(const FilePath& from_path, const FilePath& to_path);
void UpdateBurnStatus(ImageBurnStatus* status, BurnEventType evt);
private:
base::WeakPtr<BurnLibraryImpl> library_;
friend class base::RefCountedThreadSafe<BurnLibraryTaskProxy>;
DISALLOW_COPY_AND_ASSIGN(BurnLibraryTaskProxy);
};
BurnLibraryImpl::BurnLibraryImpl() {
if (CrosLibrary::Get()->EnsureLoaded()) {
Init();
} else {
LOG(ERROR) << "Cros Library has not been loaded";
}
}
BurnLibraryImpl::~BurnLibraryImpl() {
if (burn_status_connection_) {
DisconnectBurnStatus(burn_status_connection_);
}
}
void BurnLibraryImpl::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void BurnLibraryImpl::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
bool BurnLibraryImpl::DoBurn(const FilePath& from_path,
const FilePath& to_path) {
BurnLibraryTaskProxy* task = new BurnLibraryTaskProxy(AsWeakPtr());
task->AddRef();
task->BurnImage(from_path, to_path);
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
NewRunnableMethod(task, &BurnLibraryTaskProxy::BurnImage,
from_path, to_path));
return true;
}
bool BurnLibraryImpl::BurnImage(const FilePath& from_path,
const FilePath& to_path) {
// Make sure we run on file thread.
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
// Check if there is a target path already being burnt to.
if (target_path_ == "") {
target_path_ = to_path.value();
} else {
return false;
}
StartBurn(from_path.value().c_str(), to_path.value().c_str(),
burn_status_connection_);
return true;
}
void BurnLibraryImpl::BurnStatusChangedHandler(void* object,
const BurnStatus& status,
BurnEventType evt) {
BurnLibraryImpl* burn = static_cast<BurnLibraryImpl*>(object);
// Copy burn status because it will be freed after returning from this method.
ImageBurnStatus* status_copy = new ImageBurnStatus(status);
BurnLibraryTaskProxy* task = new BurnLibraryTaskProxy(burn->AsWeakPtr());
task->AddRef();
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
NewRunnableMethod(task, &BurnLibraryTaskProxy::UpdateBurnStatus,
status_copy, evt));
}
void BurnLibraryImpl::Init() {
burn_status_connection_ = MonitorBurnStatus(&BurnStatusChangedHandler, this);
}
void BurnLibraryImpl::UpdateBurnStatus(const ImageBurnStatus& status,
BurnEventType evt) {
// Make sure we run on UI thread.
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
// If burn is finished, remove target paths from paths being burnt to.
// This has to be done in thread-safe way, hence using task proxy class.
if ((evt == BURN_CANCELED || evt == BURN_COMPLETE) &&
target_path_ == status.target_path)
target_path_ = "";
FOR_EACH_OBSERVER(Observer, observers_, ProgressUpdated(this, evt, status));
}
BurnLibraryTaskProxy::BurnLibraryTaskProxy(
const base::WeakPtr<BurnLibraryImpl>& library)
: library_(library) {
}
void BurnLibraryTaskProxy::BurnImage(const FilePath& from_path,
const FilePath& to_path) {
library_->BurnImage(from_path, to_path);
}
void BurnLibraryTaskProxy::UpdateBurnStatus(ImageBurnStatus* status,
BurnEventType evt) {
library_->UpdateBurnStatus(*status, evt);
delete status;
}
class BurnLibraryStubImpl : public BurnLibrary {
public:
BurnLibraryStubImpl() {}
virtual ~BurnLibraryStubImpl() {}
// BurnLibrary overrides.
virtual void AddObserver(Observer* observer) {}
virtual void RemoveObserver(Observer* observer) {}
virtual bool DoBurn(const FilePath& from_path, const FilePath& to_path) {
return false;
}
DISALLOW_COPY_AND_ASSIGN(BurnLibraryStubImpl);
};
// static
BurnLibrary* BurnLibrary::GetImpl(bool stub) {
if (stub)
return new BurnLibraryStubImpl();
else
return new BurnLibraryImpl();
}
} // namespace chromeos
// Allows InvokeLater without adding refcounting. This class is a Singleton and
// won't be deleted until it's last InvokeLater is run.
DISABLE_RUNNABLE_METHOD_REFCOUNT(chromeos::BurnLibraryImpl);
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