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// Copyright 2016 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/ash/arc/tts/arc_tts_service.h"
#include <utility>
#include "base/logging.h"
#include "base/memory/singleton.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "chrome/browser/speech/tts_chromeos.h"
#include "chromeos/ash/experiences/arc/arc_browser_context_keyed_service_factory_base.h"
#include "chromeos/ash/experiences/arc/session/arc_bridge_service.h"
#include "content/public/browser/tts_controller.h"
#include "third_party/icu/source/common/unicode/uloc.h"
namespace arc {
namespace {
// Singleton factory for ArcTtsService.
class ArcTtsServiceFactory
: public internal::ArcBrowserContextKeyedServiceFactoryBase<
ArcTtsService,
ArcTtsServiceFactory> {
public:
// Factory name used by ArcBrowserContextKeyedServiceFactoryBase.
static constexpr const char* kName = "ArcTtsServiceFactory";
static ArcTtsServiceFactory* GetInstance() {
return base::Singleton<ArcTtsServiceFactory>::get();
}
private:
friend base::DefaultSingletonTraits<ArcTtsServiceFactory>;
ArcTtsServiceFactory() = default;
~ArcTtsServiceFactory() override = default;
};
std::string CanonicalizeLocale(std::string locale) {
UErrorCode error = U_ZERO_ERROR;
// We only ever expect a maximum of a three-letter language code, a separator,
// followed by a three-letter country code.
static constexpr int kBufferSize = 8;
std::string canonical_locale;
int actual_size = uloc_canonicalize(
locale.c_str(), base::WriteInto(&canonical_locale, kBufferSize),
kBufferSize, &error);
if (actual_size == 0 || error != U_ZERO_ERROR)
return locale;
canonical_locale.resize(actual_size);
return canonical_locale;
}
} // namespace
// static
ArcTtsService* ArcTtsService::GetForBrowserContext(
content::BrowserContext* context) {
return ArcTtsServiceFactory::GetForBrowserContext(context);
}
// static
ArcTtsService* ArcTtsService::GetForBrowserContextForTesting(
content::BrowserContext* context) {
return ArcTtsServiceFactory::GetForBrowserContextForTesting(context);
}
ArcTtsService::ArcTtsService(content::BrowserContext* context,
ArcBridgeService* bridge_service)
: arc_bridge_service_(bridge_service), tts_controller_(nullptr) {
arc_bridge_service_->tts()->SetHost(this);
}
ArcTtsService::~ArcTtsService() {
arc_bridge_service_->tts()->SetHost(nullptr);
}
void ArcTtsService::OnTtsEvent(uint32_t id,
mojom::TtsEventType event_type,
uint32_t char_index,
uint32_t length,
const std::string& error_msg) {
if (!tts_controller_) {
// GetInstance() returns a base::Singleton<> object which always outlives
// |this| object.
tts_controller_ = content::TtsController::GetInstance();
if (!tts_controller_) {
LOG(WARNING) << "TtsController is not available.";
return;
}
}
content::TtsEventType chrome_event_type;
switch (event_type) {
case mojom::TtsEventType::START:
chrome_event_type = content::TTS_EVENT_START;
break;
case mojom::TtsEventType::END:
chrome_event_type = content::TTS_EVENT_END;
break;
case mojom::TtsEventType::INTERRUPTED:
chrome_event_type = content::TTS_EVENT_INTERRUPTED;
break;
case mojom::TtsEventType::ERROR:
chrome_event_type = content::TTS_EVENT_ERROR;
break;
case mojom::TtsEventType::WORD:
chrome_event_type = content::TTS_EVENT_WORD;
TtsPlatformImplChromeOs::GetInstance()->ReceivedWordEvent();
}
tts_controller_->OnTtsEvent(id, chrome_event_type, char_index, length,
error_msg);
}
void ArcTtsService::OnVoicesChanged(std::vector<mojom::TtsVoicePtr> voices) {
std::vector<content::VoiceData> chrome_voices;
for (const auto& voice : voices) {
chrome_voices.emplace_back();
content::VoiceData& chrome_voice = chrome_voices.back();
chrome_voice.native = true;
chrome_voice.native_voice_identifier = base::NumberToString(voice->id);
chrome_voice.name = std::move(voice->name);
// Normalizes using ICU; in particular, turns language codes from three to
// two letter codes. Then, replaces _ with - (expected by Chrome's tts
// controller).
chrome_voice.lang = CanonicalizeLocale(std::move(voice->locale));
for (size_t i = 0; i < chrome_voice.lang.size(); i++) {
if (chrome_voice.lang[i] == '_')
chrome_voice.lang[i] = '-';
}
chrome_voice.remote = voice->is_network_connection_required;
chrome_voice.events.insert(content::TTS_EVENT_START);
chrome_voice.events.insert(content::TTS_EVENT_END);
chrome_voice.events.insert(content::TTS_EVENT_INTERRUPTED);
chrome_voice.events.insert(content::TTS_EVENT_ERROR);
}
TtsPlatformImplChromeOs* impl = TtsPlatformImplChromeOs::GetInstance();
DCHECK(impl);
impl->SetVoices(std::move(chrome_voices));
content::TtsController::GetInstance()->VoicesChanged();
}
// static
void ArcTtsService::EnsureFactoryBuilt() {
ArcTtsServiceFactory::GetInstance();
}
} // namespace arc
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