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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_hotkey_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 "ui/events/event.h"
#include "ui/events/event_utils.h"
#include "ui/events/keycodes/keyboard_codes.h"
#include "ui/events/platform/platform_event_observer.h"
#include "ui/events/platform/platform_event_source.h"
namespace remoting {
namespace {
class LocalHotkeyInputMonitorChromeos : public LocalHotkeyInputMonitor {
public:
LocalHotkeyInputMonitorChromeos(
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
base::OnceClosure disconnect_callback);
LocalHotkeyInputMonitorChromeos(const LocalHotkeyInputMonitorChromeos&) =
delete;
LocalHotkeyInputMonitorChromeos& operator=(
const LocalHotkeyInputMonitorChromeos&) = delete;
~LocalHotkeyInputMonitorChromeos() override;
private:
class Core : ui::PlatformEventObserver {
public:
Core(scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
base::OnceClosure disconnect_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:
void HandleKeyPressed(const ui::PlatformEvent& event);
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
// Must be called on |caller_task_runner_|.
base::OnceClosure disconnect_callback_;
};
// Task runner on which ui::events are received.
scoped_refptr<base::SingleThreadTaskRunner> input_task_runner_;
std::unique_ptr<Core> core_;
};
LocalHotkeyInputMonitorChromeos::LocalHotkeyInputMonitorChromeos(
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
base::OnceClosure disconnect_callback)
: input_task_runner_(input_task_runner),
core_(new Core(caller_task_runner, std::move(disconnect_callback))) {
input_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&Core::Start, base::Unretained(core_.get())));
}
LocalHotkeyInputMonitorChromeos::~LocalHotkeyInputMonitorChromeos() {
input_task_runner_->DeleteSoon(FROM_HERE, core_.release());
}
LocalHotkeyInputMonitorChromeos::Core::Core(
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
base::OnceClosure disconnect_callback)
: caller_task_runner_(caller_task_runner),
disconnect_callback_(std::move(disconnect_callback)) {
DCHECK(disconnect_callback_);
}
void LocalHotkeyInputMonitorChromeos::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. (And if that doesn't work, maybe a PointerObserver.)
if (ui::PlatformEventSource::GetInstance()) {
ui::PlatformEventSource::GetInstance()->AddPlatformEventObserver(this);
}
}
LocalHotkeyInputMonitorChromeos::Core::~Core() {
if (ui::PlatformEventSource::GetInstance()) {
ui::PlatformEventSource::GetInstance()->RemovePlatformEventObserver(this);
}
}
void LocalHotkeyInputMonitorChromeos::Core::WillProcessEvent(
const ui::PlatformEvent& event) {
// No need to handle this callback.
}
void LocalHotkeyInputMonitorChromeos::Core::DidProcessEvent(
const ui::PlatformEvent& event) {
ui::EventType type = ui::EventTypeFromNative(event);
if (type == ui::EventType::kKeyPressed) {
HandleKeyPressed(event);
}
}
void LocalHotkeyInputMonitorChromeos::Core::HandleKeyPressed(
const ui::PlatformEvent& event) {
// Ignore input if we've already initiated a disconnect.
if (!disconnect_callback_) {
return;
}
DCHECK(event->IsKeyEvent());
ui::KeyEvent key_event(event);
if (key_event.IsControlDown() && key_event.IsAltDown() &&
key_event.key_code() == ui::VKEY_ESCAPE) {
caller_task_runner_->PostTask(FROM_HERE, std::move(disconnect_callback_));
}
}
} // namespace
std::unique_ptr<LocalHotkeyInputMonitor> LocalHotkeyInputMonitor::Create(
scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
base::OnceClosure disconnect_callback) {
return std::make_unique<LocalHotkeyInputMonitorChromeos>(
caller_task_runner, input_task_runner, std::move(disconnect_callback));
}
} // namespace remoting
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