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// Copyright 2022 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/screen_ai/screen_ai_service_router.h"
#include <utility>
#include <vector>
#include "base/containers/contains.h"
#include "base/containers/flat_map.h"
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/memory/memory_pressure_monitor.h"
#include "base/metrics/histogram_functions.h"
#include "base/strings/string_split.h"
#include "base/strings/stringprintf.h"
#include "base/system/sys_info.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/thread_pool.h"
#include "chrome/browser/screen_ai/screen_ai_install_state.h"
#include "content/public/browser/network_service_instance.h"
#include "content/public/browser/service_process_host.h"
#include "content/public/browser/service_process_host_passkeys.h"
#include "mojo/public/mojom/base/file_path.mojom.h"
#include "services/network/public/mojom/network_change_manager.mojom.h"
#include "services/screen_ai/public/cpp/utilities.h"
#include "ui/accessibility/accessibility_features.h"
#if BUILDFLAG(IS_WIN)
#include "base/strings/utf_string_conversions.h"
#endif
namespace {
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
// If any value is added, please update `ComponentAvailability` in `enums.xml`.
enum class ComponentAvailability {
kAvailable = 0,
kUnavailableWithNetwork = 1,
kUnavailableWithoutNetwork = 2,
kMaxValue = kUnavailableWithoutNetwork,
};
void RecordComponentAvailability(bool available) {
bool network = !content::GetNetworkConnectionTracker()->IsOffline();
base::UmaHistogramEnumeration(
"Accessibility.ScreenAI.Component.Available2",
available
? ComponentAvailability::kAvailable
: (network ? ComponentAvailability::kUnavailableWithNetwork
: ComponentAvailability::kUnavailableWithoutNetwork));
}
} // namespace
namespace screen_ai {
ScreenAIServiceRouter::ScreenAIServiceRouter() = default;
ScreenAIServiceRouter::~ScreenAIServiceRouter() = default;
// static
// LINT.IfChange(SuggestedWaitTimeBeforeReAttempt)
base::TimeDelta ScreenAIServiceRouter::SuggestedWaitTimeBeforeReAttempt(
uint32_t reattempt_number) {
return base::Minutes(reattempt_number * reattempt_number);
}
// LINT.ThenChange(//chrome/browser/ash/app_list/search/local_image_search/image_annotation_worker.cc:SuggestedWaitTimeBeforeReAttempt)
ScreenAIServiceHandlerBase* ScreenAIServiceRouter::GetHandler(Service service) {
switch (service) {
case Service::kMainContentExtraction:
if (!mce_handler_) {
mce_handler_ =
std::make_unique<ScreenAIServiceHandlerMainContentExtraction>();
}
return mce_handler_.get();
case Service::kOCR:
if (!ocr_handler_) {
ocr_handler_ = std::make_unique<ScreenAIServiceHandlerOCR>();
}
return ocr_handler_.get();
}
}
void ScreenAIServiceRouter::GetServiceStateAsync(
Service service,
ServiceStateCallback callback) {
std::optional<bool> service_state =
GetHandler(service)->GetServiceStateAsync(std::move(callback));
// If `service_state` has value, either the service is already initialized or
// disabled. In both cases we can can assume the component was ready.
// Otherwise its download should be triggered.
if (service_state) {
RecordComponentAvailability(true);
return;
}
auto* install_state = ScreenAIInstallState::GetInstance();
// If download has previously failed, reset it.
if (install_state->get_state() ==
ScreenAIInstallState::State::kDownloadFailed) {
install_state->SetState(ScreenAIInstallState::State::kNotDownloaded);
}
// Observe component state if not already observed, otherwise trigger
// download. (Adding observer also triggers download.)
if (!component_ready_observer_.IsObserving()) {
component_ready_observer_.Observe(install_state);
} else {
install_state->DownloadComponent();
}
}
void ScreenAIServiceRouter::StateChanged(ScreenAIInstallState::State state) {
bool available = true;
switch (state) {
case ScreenAIInstallState::State::kNotDownloaded:
case ScreenAIInstallState::State::kDownloading:
return;
case ScreenAIInstallState::State::kDownloadFailed:
available = false;
ABSL_FALLTHROUGH_INTENDED;
case ScreenAIInstallState::State::kDownloaded:
if (mce_handler_) {
mce_handler_->OnLibraryAvailablityChanged(available);
}
if (ocr_handler_) {
ocr_handler_->OnLibraryAvailablityChanged(available);
}
RecordComponentAvailability(available);
break;
}
// No need to observe after library is downloaded or download has failed.
component_ready_observer_.Reset();
}
void ScreenAIServiceRouter::BindScreenAIAnnotator(
mojo::PendingReceiver<mojom::ScreenAIAnnotator> receiver) {
// Ensure handler exists.
GetHandler(Service::kOCR);
ocr_handler_->BindService(std::move(receiver));
}
void ScreenAIServiceRouter::BindMainContentExtractor(
mojo::PendingReceiver<mojom::Screen2xMainContentExtractor> receiver) {
// Ensure handler exists.
GetHandler(Service::kMainContentExtraction);
mce_handler_->BindService(std::move(receiver));
}
bool ScreenAIServiceRouter::IsConnectionBoundForTesting(Service service) {
switch (service) {
case Service::kMainContentExtraction:
return mce_handler_ &&
mce_handler_->IsConnectionBoundForTesting(); // IN-TEST
case Service::kOCR:
return ocr_handler_ &&
ocr_handler_->IsConnectionBoundForTesting(); // IN-TEST
}
}
bool ScreenAIServiceRouter::IsProcessRunningForTesting(Service service) {
switch (service) {
case Service::kMainContentExtraction:
return mce_handler_ &&
mce_handler_->IsProcessRunningForTesting(); // IN-TEST
case Service::kOCR:
return ocr_handler_ &&
ocr_handler_->IsProcessRunningForTesting(); // IN-TEST
}
}
} // namespace screen_ai
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