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// Copyright 2013 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/extensions/api/braille_display_private/braille_display_private_api.h"
#include "base/lazy_instance.h"
#include "chrome/browser/extensions/api/braille_display_private/braille_controller.h"
#include "chrome/browser/extensions/extension_system.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#if defined(OS_CHROMEOS)
#include "chrome/browser/chromeos/login/screen_locker.h"
#include "chrome/browser/chromeos/profiles/profile_helper.h"
#endif
namespace OnDisplayStateChanged =
extensions::api::braille_display_private::OnDisplayStateChanged;
namespace OnKeyEvent = extensions::api::braille_display_private::OnKeyEvent;
namespace WriteDots = extensions::api::braille_display_private::WriteDots;
using extensions::api::braille_display_private::DisplayState;
using extensions::api::braille_display_private::KeyEvent;
using extensions::api::braille_display_private::BrailleController;
namespace extensions {
class BrailleDisplayPrivateAPI::DefaultEventDelegate
: public BrailleDisplayPrivateAPI::EventDelegate {
public:
DefaultEventDelegate(EventRouter::Observer* observer, Profile* profile);
virtual ~DefaultEventDelegate();
virtual void BroadcastEvent(scoped_ptr<Event> event) OVERRIDE;
virtual bool HasListener() OVERRIDE;
private:
EventRouter::Observer* observer_;
Profile* profile_;
};
BrailleDisplayPrivateAPI::BrailleDisplayPrivateAPI(Profile* profile)
: profile_(profile), scoped_observer_(this),
event_delegate_(new DefaultEventDelegate(this, profile_)) {
}
BrailleDisplayPrivateAPI::~BrailleDisplayPrivateAPI() {
}
void BrailleDisplayPrivateAPI::Shutdown() {
}
static base::LazyInstance<ProfileKeyedAPIFactory<BrailleDisplayPrivateAPI> >
g_factory = LAZY_INSTANCE_INITIALIZER;
// static
ProfileKeyedAPIFactory<BrailleDisplayPrivateAPI>*
BrailleDisplayPrivateAPI::GetFactoryInstance() {
return g_factory.Pointer();
}
void BrailleDisplayPrivateAPI::OnDisplayStateChanged(
const DisplayState& display_state) {
scoped_ptr<Event> event(new Event(
OnDisplayStateChanged::kEventName,
OnDisplayStateChanged::Create(display_state)));
event_delegate_->BroadcastEvent(event.Pass());
}
void BrailleDisplayPrivateAPI::OnKeyEvent(
const KeyEvent& key_event) {
// Key events only go to extensions of the active profile.
if (!IsProfileActive())
return;
scoped_ptr<Event> event(new Event(
OnKeyEvent::kEventName, OnKeyEvent::Create(key_event)));
event_delegate_->BroadcastEvent(event.Pass());
}
bool BrailleDisplayPrivateAPI::IsProfileActive() {
#if defined(OS_CHROMEOS)
Profile* active_profile;
chromeos::ScreenLocker* screen_locker =
chromeos::ScreenLocker::default_screen_locker();
if (screen_locker && screen_locker->locked()) {
active_profile = chromeos::ProfileHelper::GetSigninProfile();
} else {
// Since we are creating one instance per profile / user, we should be fine
// comparing against the active user. That said - if we ever change that,
// this code will need to be changed.
active_profile = ProfileManager::GetActiveUserProfile();
}
return profile_->IsSameProfile(active_profile);
#else // !defined(OS_CHROMEOS)
return true;
#endif
}
void BrailleDisplayPrivateAPI::SetEventDelegateForTest(
scoped_ptr<EventDelegate> delegate) {
event_delegate_ = delegate.Pass();
}
void BrailleDisplayPrivateAPI::OnListenerAdded(
const EventListenerInfo& details) {
BrailleController* braille_controller = BrailleController::GetInstance();
if (!scoped_observer_.IsObserving(braille_controller))
scoped_observer_.Add(braille_controller);
}
void BrailleDisplayPrivateAPI::OnListenerRemoved(
const EventListenerInfo& details) {
BrailleController* braille_controller = BrailleController::GetInstance();
if (!event_delegate_->HasListener() &&
scoped_observer_.IsObserving(braille_controller)) {
scoped_observer_.Remove(braille_controller);
}
}
BrailleDisplayPrivateAPI::DefaultEventDelegate::DefaultEventDelegate(
EventRouter::Observer* observer, Profile* profile)
: observer_(observer), profile_(profile) {
EventRouter* event_router = ExtensionSystem::Get(profile_)->event_router();
event_router->RegisterObserver(observer_, OnDisplayStateChanged::kEventName);
event_router->RegisterObserver(observer_, OnKeyEvent::kEventName);
}
BrailleDisplayPrivateAPI::DefaultEventDelegate::~DefaultEventDelegate() {
ExtensionSystem::Get(profile_)->event_router()->UnregisterObserver(observer_);
}
void BrailleDisplayPrivateAPI::DefaultEventDelegate::BroadcastEvent(
scoped_ptr<Event> event) {
ExtensionSystem::Get(profile_)->event_router()->BroadcastEvent(event.Pass());
}
bool BrailleDisplayPrivateAPI::DefaultEventDelegate::HasListener() {
EventRouter* event_router = ExtensionSystem::Get(profile_)->event_router();
return (event_router->HasEventListener(OnDisplayStateChanged::kEventName) ||
event_router->HasEventListener(OnKeyEvent::kEventName));
}
namespace api {
bool BrailleDisplayPrivateGetDisplayStateFunction::Prepare() {
return true;
}
void BrailleDisplayPrivateGetDisplayStateFunction::Work() {
SetResult(
BrailleController::GetInstance()->GetDisplayState()->ToValue().release());
}
bool BrailleDisplayPrivateGetDisplayStateFunction::Respond() {
return true;
}
BrailleDisplayPrivateWriteDotsFunction::
BrailleDisplayPrivateWriteDotsFunction() {
}
BrailleDisplayPrivateWriteDotsFunction::
~BrailleDisplayPrivateWriteDotsFunction() {
}
bool BrailleDisplayPrivateWriteDotsFunction::Prepare() {
params_ = WriteDots::Params::Create(*args_);
EXTENSION_FUNCTION_VALIDATE(params_);
return true;
}
void BrailleDisplayPrivateWriteDotsFunction::Work() {
BrailleController::GetInstance()->WriteDots(params_->cells);
}
bool BrailleDisplayPrivateWriteDotsFunction::Respond() {
return true;
}
} // namespace api
} // namespace extensions
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