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// Copyright (c) 2010 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/brightness_library.h"
#include "base/message_loop.h"
#include "base/observer_list.h"
#include "chrome/browser/browser_thread.h"
#include "chrome/browser/chromeos/brightness_bubble.h"
#include "chrome/browser/chromeos/volume_bubble.h"
#include "chrome/browser/chromeos/cros/cros_library.h"
namespace chromeos {
class BrightnessLibraryImpl : public BrightnessLibrary {
public:
BrightnessLibraryImpl() : brightness_connection_(NULL) {
if (CrosLibrary::Get()->EnsureLoaded())
Init();
}
~BrightnessLibraryImpl() {
if (brightness_connection_) {
chromeos::DisconnectBrightness(brightness_connection_);
brightness_connection_ = NULL;
}
}
void AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
private:
static void BrightnessChangedHandler(void* object,
int brightness_level) {
BrightnessLibraryImpl* self = static_cast<BrightnessLibraryImpl*>(object);
self->OnBrightnessChanged(brightness_level);
}
void Init() {
DCHECK(!brightness_connection_) << "Already intialized";
brightness_connection_ =
chromeos::MonitorBrightness(&BrightnessChangedHandler, this);
}
void OnBrightnessChanged(int brightness_level) {
// Make sure we run on the UI thread.
if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
NewRunnableMethod(this,
&BrightnessLibraryImpl::OnBrightnessChanged,
brightness_level));
return;
}
FOR_EACH_OBSERVER(Observer,
observers_,
BrightnessChanged(brightness_level));
}
chromeos::BrightnessConnection brightness_connection_;
ObserverList<Observer> observers_;
DISALLOW_COPY_AND_ASSIGN(BrightnessLibraryImpl);
};
class BrightnessLibraryStubImpl : public BrightnessLibrary {
public:
BrightnessLibraryStubImpl() {}
~BrightnessLibraryStubImpl() {}
void AddObserver(Observer* observer) {}
void RemoveObserver(Observer* observer) {}
};
// static
BrightnessLibrary* BrightnessLibrary::GetImpl(bool stub) {
if (stub)
return new BrightnessLibraryStubImpl();
else
return new BrightnessLibraryImpl();
}
} // namespace chromeos
// Needed for NewRunnableMethod() call above.
DISABLE_RUNNABLE_METHOD_REFCOUNT(chromeos::BrightnessLibraryImpl);
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