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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/x/x11_user_input_monitor.h"
#include "base/logging.h"
#include "base/task/single_thread_task_runner.h"
#include "ui/events/devices/x11/xinput_util.h"
#include "ui/events/keycodes/keyboard_code_conversion_x.h"
#include "ui/gfx/x/future.h"
namespace ui {
XUserInputMonitor::XUserInputMonitor(
const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner)
: io_task_runner_(io_task_runner) {}
XUserInputMonitor::~XUserInputMonitor() {
DCHECK(!connection_);
}
void XUserInputMonitor::WillDestroyCurrentMessageLoop() {
DCHECK(io_task_runner_->BelongsToCurrentThread());
StopMonitor();
}
void XUserInputMonitor::OnEvent(const x11::Event& event) {
DCHECK(io_task_runner_->BelongsToCurrentThread());
DCHECK(write_key_press_callback_);
auto* raw = event.As<x11::Input::RawDeviceEvent>();
if (!raw || (raw->opcode != x11::Input::RawDeviceEvent::RawKeyPress &&
raw->opcode != x11::Input::RawDeviceEvent::RawKeyRelease)) {
return;
}
EventType type = raw->opcode == x11::Input::RawDeviceEvent::RawKeyPress
? EventType::kKeyPressed
: EventType::kKeyReleased;
auto key_sym =
connection_->KeycodeToKeysym(static_cast<x11::KeyCode>(raw->detail), 0);
KeyboardCode key_code = KeyboardCodeFromXKeysym(key_sym);
counter_.OnKeyboardEvent(type, key_code);
// Update count value in shared memory.
if (key_press_count_mapping_) {
write_key_press_callback_.Run(*key_press_count_mapping_,
GetKeyPressCount());
}
}
uint32_t XUserInputMonitor::GetKeyPressCount() const {
return counter_.GetKeyPressCount();
}
void XUserInputMonitor::StartMonitor(WriteKeyPressCallback& callback) {
DCHECK(io_task_runner_->BelongsToCurrentThread());
write_key_press_callback_ = callback;
if (!connection_) {
// TODO(jamiewalch): We should pass the connection in.
if (auto* connection = x11::Connection::Get()) {
connection_ = connection->Clone();
} else {
LOG(ERROR) << "Couldn't open X connection";
StopMonitor();
return;
}
}
connection_->AddEventObserver(this);
if (!connection_->xinput().present()) {
LOG(ERROR) << "X Input extension not available.";
StopMonitor();
return;
}
x11::Input::XIEventMask mask{};
SetXinputMask(&mask, x11::Input::RawDeviceEvent::RawKeyPress);
SetXinputMask(&mask, x11::Input::RawDeviceEvent::RawKeyRelease);
connection_->xinput().XISelectEvents(
{connection_->default_root(),
{{x11::Input::DeviceId::AllMaster, {mask}}}});
connection_->Flush();
// Register OnConnectionData() to be called every time there is something to
// read from |connection_|.
watch_controller_ = base::FileDescriptorWatcher::WatchReadable(
connection_->GetFd(),
base::BindRepeating(&XUserInputMonitor::OnConnectionData,
base::Unretained(this)));
// Start observing message loop destruction if we start monitoring the first
// event.
base::CurrentThread::Get()->AddDestructionObserver(this);
// Fetch pending events if any.
OnConnectionData();
}
void XUserInputMonitor::StartMonitorWithMapping(
WriteKeyPressCallback& callback,
base::WritableSharedMemoryMapping mapping) {
StartMonitor(callback);
key_press_count_mapping_ =
std::make_unique<base::WritableSharedMemoryMapping>(std::move(mapping));
}
void XUserInputMonitor::StopMonitor() {
DCHECK(io_task_runner_->BelongsToCurrentThread());
watch_controller_.reset();
connection_.reset();
key_press_count_mapping_.reset();
// Stop observing message loop destruction if no event is being monitored.
base::CurrentThread::Get()->RemoveDestructionObserver(this);
}
void XUserInputMonitor::OnConnectionData() {
DCHECK(io_task_runner_->BelongsToCurrentThread());
connection_->DispatchAll();
}
} // namespace ui
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