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// Copyright 2013 The Chromium Authors
// 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 <utility>
#include "base/lazy_instance.h"
#include "base/memory/raw_ptr.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "chrome/browser/extensions/api/braille_display_private/braille_controller.h"
#include "chrome/browser/profiles/profile.h"
#if BUILDFLAG(IS_CHROMEOS)
#include "chrome/browser/ash/accessibility/accessibility_manager.h"
#include "chrome/browser/ash/login/lock/screen_locker.h"
#include "extensions/browser/extensions_browser_client.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);
~DefaultEventDelegate() override;
void BroadcastEvent(std::unique_ptr<Event> event) override;
bool HasListener() override;
private:
raw_ptr<EventRouter::Observer> observer_;
raw_ptr<Profile> profile_;
};
BrailleDisplayPrivateAPI::BrailleDisplayPrivateAPI(
content::BrowserContext* context)
: profile_(Profile::FromBrowserContext(context)),
event_delegate_(new DefaultEventDelegate(this, profile_)) {}
BrailleDisplayPrivateAPI::~BrailleDisplayPrivateAPI() = default;
void BrailleDisplayPrivateAPI::Shutdown() {
event_delegate_.reset();
}
static base::LazyInstance<
BrowserContextKeyedAPIFactory<BrailleDisplayPrivateAPI>>::DestructorAtExit
g_braille_display_private_api_factory = LAZY_INSTANCE_INITIALIZER;
// static
BrowserContextKeyedAPIFactory<BrailleDisplayPrivateAPI>*
BrailleDisplayPrivateAPI::GetFactoryInstance() {
return g_braille_display_private_api_factory.Pointer();
}
void BrailleDisplayPrivateAPI::OnBrailleDisplayStateChanged(
const DisplayState& display_state) {
std::unique_ptr<Event> event(
new Event(events::BRAILLE_DISPLAY_PRIVATE_ON_DISPLAY_STATE_CHANGED,
OnDisplayStateChanged::kEventName,
OnDisplayStateChanged::Create(display_state)));
event_delegate_->BroadcastEvent(std::move(event));
}
void BrailleDisplayPrivateAPI::OnBrailleKeyEvent(const KeyEvent& key_event) {
// Key events only go to extensions of the active profile.
if (!IsProfileActive()) {
return;
}
std::unique_ptr<Event> event(
new Event(events::BRAILLE_DISPLAY_PRIVATE_ON_KEY_EVENT,
OnKeyEvent::kEventName, OnKeyEvent::Create(key_event)));
event_delegate_->BroadcastEvent(std::move(event));
}
bool BrailleDisplayPrivateAPI::IsProfileActive() {
#if BUILDFLAG(IS_CHROMEOS)
return extensions::ExtensionsBrowserClient::Get()->IsActiveContext(profile_);
#else // !BUILDFLAG(IS_CHROMEOS)
return true;
#endif
}
void BrailleDisplayPrivateAPI::SetEventDelegateForTest(
std::unique_ptr<EventDelegate> delegate) {
event_delegate_ = std::move(delegate);
}
void BrailleDisplayPrivateAPI::OnListenerAdded(
const EventListenerInfo& details) {
BrailleController* braille_controller = BrailleController::GetInstance();
if (!scoped_observation_.IsObservingSource(braille_controller)) {
scoped_observation_.Observe(braille_controller);
}
}
void BrailleDisplayPrivateAPI::OnListenerRemoved(
const EventListenerInfo& details) {
BrailleController* braille_controller = BrailleController::GetInstance();
if (!event_delegate_->HasListener() &&
scoped_observation_.IsObservingSource(braille_controller)) {
scoped_observation_.Reset();
}
}
BrailleDisplayPrivateAPI::DefaultEventDelegate::DefaultEventDelegate(
EventRouter::Observer* observer, Profile* profile)
: observer_(observer), profile_(profile) {
EventRouter* event_router = EventRouter::Get(profile_);
event_router->RegisterObserver(observer_, OnDisplayStateChanged::kEventName);
event_router->RegisterObserver(observer_, OnKeyEvent::kEventName);
}
BrailleDisplayPrivateAPI::DefaultEventDelegate::~DefaultEventDelegate() {
EventRouter::Get(profile_)->UnregisterObserver(observer_);
}
void BrailleDisplayPrivateAPI::DefaultEventDelegate::BroadcastEvent(
std::unique_ptr<Event> event) {
EventRouter::Get(profile_)->BroadcastEvent(std::move(event));
}
bool BrailleDisplayPrivateAPI::DefaultEventDelegate::HasListener() {
EventRouter* event_router = EventRouter::Get(profile_);
return (event_router->HasEventListener(OnDisplayStateChanged::kEventName) ||
event_router->HasEventListener(OnKeyEvent::kEventName));
}
namespace api {
ExtensionFunction::ResponseAction
BrailleDisplayPrivateGetDisplayStateFunction::Run() {
auto get_display_state_on_io = []() {
return BrailleController::GetInstance()->GetDisplayState()->ToValue();
};
bool did_post_task =
content::GetIOThreadTaskRunner({})->PostTaskAndReplyWithResult(
FROM_HERE, base::BindOnce(get_display_state_on_io),
base::BindOnce(
&BrailleDisplayPrivateGetDisplayStateFunction::ReplyWithState,
this));
DCHECK(did_post_task);
return RespondLater();
}
void BrailleDisplayPrivateGetDisplayStateFunction::ReplyWithState(
base::Value::Dict state) {
Respond(WithArguments(std::move(state)));
}
BrailleDisplayPrivateWriteDotsFunction::
BrailleDisplayPrivateWriteDotsFunction() = default;
BrailleDisplayPrivateWriteDotsFunction::
~BrailleDisplayPrivateWriteDotsFunction() = default;
ExtensionFunction::ResponseAction
BrailleDisplayPrivateWriteDotsFunction::Run() {
params_ = WriteDots::Params::Create(args());
EXTENSION_FUNCTION_VALIDATE(params_);
bool did_post_task = content::GetIOThreadTaskRunner({})->PostTaskAndReply(
FROM_HERE,
base::BindOnce(&BrailleDisplayPrivateWriteDotsFunction::WriteDotsOnIO,
this),
base::BindOnce(&BrailleDisplayPrivateWriteDotsFunction::Respond, this,
NoArguments()));
DCHECK(did_post_task);
return RespondLater();
}
void BrailleDisplayPrivateWriteDotsFunction::WriteDotsOnIO() {
BrailleController::GetInstance()->WriteDots(params_->cells, params_->columns,
params_->rows);
}
ExtensionFunction::ResponseAction
BrailleDisplayPrivateUpdateBluetoothBrailleDisplayAddressFunction::Run() {
#if BUILDFLAG(IS_CHROMEOS)
EXTENSION_FUNCTION_VALIDATE(args().size() >= 1);
EXTENSION_FUNCTION_VALIDATE(args()[0].is_string());
const std::string& address = args()[0].GetString();
ash::AccessibilityManager::Get()->UpdateBluetoothBrailleDisplayAddress(
address);
return RespondNow(NoArguments());
#else
NOTREACHED();
#endif
}
} // namespace api
} // namespace extensions
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