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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/input_monitor/local_keyboard_input_monitor.h"
#include <utility>
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/location.h"
#include "base/task/single_thread_task_runner.h"
#include "remoting/host/chromeos/point_transformer.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
#include "ui/events/event.h"
#include "ui/events/event_utils.h"
#include "ui/events/keycodes/dom/keycode_converter.h"
#include "ui/events/platform/platform_event_observer.h"
#include "ui/events/platform/platform_event_source.h"
namespace remoting {
namespace {
bool IsInjectedByCrd(const ui::PlatformEvent& event) {
return event->source_device_id() == ui::ED_REMOTE_INPUT_DEVICE;
}
class LocalKeyboardInputMonitorChromeos : public LocalKeyboardInputMonitor {
public:
LocalKeyboardInputMonitorChromeos(
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
LocalInputMonitor::KeyPressedCallback key_pressed_callback);
LocalKeyboardInputMonitorChromeos(const LocalKeyboardInputMonitorChromeos&) =
delete;
LocalKeyboardInputMonitorChromeos& operator=(
const LocalKeyboardInputMonitorChromeos&) = delete;
~LocalKeyboardInputMonitorChromeos() override;
private:
class Core : ui::PlatformEventObserver {
public:
Core(scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
LocalInputMonitor::KeyPressedCallback on_key_event_callback);
Core(const Core&) = delete;
Core& operator=(const Core&) = delete;
~Core() override;
void Start();
// ui::PlatformEventObserver interface.
void WillProcessEvent(const ui::PlatformEvent& event) override;
void DidProcessEvent(const ui::PlatformEvent& event) override;
private:
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
LocalInputMonitor::KeyPressedCallback key_pressed_callback_;
};
// Task runner on which ui::events are received.
scoped_refptr<base::SingleThreadTaskRunner> input_task_runner_;
std::unique_ptr<Core> core_;
};
LocalKeyboardInputMonitorChromeos::LocalKeyboardInputMonitorChromeos(
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
LocalInputMonitor::KeyPressedCallback key_pressed_callback)
: input_task_runner_(input_task_runner),
core_(new Core(caller_task_runner, std::move(key_pressed_callback))) {
input_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&Core::Start, base::Unretained(core_.get())));
}
LocalKeyboardInputMonitorChromeos::~LocalKeyboardInputMonitorChromeos() {
input_task_runner_->DeleteSoon(FROM_HERE, core_.release());
}
LocalKeyboardInputMonitorChromeos::Core::Core(
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
LocalInputMonitor::KeyPressedCallback key_pressed_callback)
: caller_task_runner_(caller_task_runner),
key_pressed_callback_(std::move(key_pressed_callback)) {}
void LocalKeyboardInputMonitorChromeos::Core::Start() {
// TODO(erg): Need to handle the mus case where PlatformEventSource is null
// because we are in mus. This class looks like it can be rewritten with mus
// EventMatchers.
if (ui::PlatformEventSource::GetInstance()) {
ui::PlatformEventSource::GetInstance()->AddPlatformEventObserver(this);
}
}
LocalKeyboardInputMonitorChromeos::Core::~Core() {
if (ui::PlatformEventSource::GetInstance()) {
ui::PlatformEventSource::GetInstance()->RemovePlatformEventObserver(this);
}
}
void LocalKeyboardInputMonitorChromeos::Core::WillProcessEvent(
const ui::PlatformEvent& event) {
// No need to handle this callback.
}
void LocalKeyboardInputMonitorChromeos::Core::DidProcessEvent(
const ui::PlatformEvent& event) {
// Do not pass on events remotely injected by CRD, as we're supposed to
// monitor for local input only.
if (IsInjectedByCrd(event)) {
return;
}
ui::EventType type = ui::EventTypeFromNative(event);
if (type == ui::EventType::kKeyPressed) {
ui::DomCode dom_code = ui::CodeFromNative(event);
uint32_t usb_keycode = ui::KeycodeConverter::DomCodeToUsbKeycode(dom_code);
caller_task_runner_->PostTask(
FROM_HERE, base::BindOnce(key_pressed_callback_, usb_keycode));
}
}
} // namespace
std::unique_ptr<LocalKeyboardInputMonitor> LocalKeyboardInputMonitor::Create(
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
LocalInputMonitor::KeyPressedCallback on_key_event_callback,
base::OnceClosure disconnect_callback) {
return std::make_unique<LocalKeyboardInputMonitorChromeos>(
caller_task_runner, input_task_runner, std::move(on_key_event_callback));
}
} // namespace remoting
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