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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/events/ozone/evdev/event_factory_evdev.h"
#include "base/bind.h"
#include "base/debug/trace_event.h"
#include "base/task_runner.h"
#include "base/thread_task_runner_handle.h"
#include "base/threading/worker_pool.h"
#include "base/time/time.h"
#include "ui/events/devices/device_data_manager.h"
#include "ui/events/devices/input_device.h"
#include "ui/events/ozone/device/device_event.h"
#include "ui/events/ozone/device/device_manager.h"
#include "ui/events/ozone/evdev/cursor_delegate_evdev.h"
#include "ui/events/ozone/evdev/input_controller_evdev.h"
#include "ui/events/ozone/evdev/input_device_factory_evdev.h"
#include "ui/events/ozone/evdev/input_device_factory_evdev_proxy.h"
#include "ui/events/ozone/evdev/input_injector_evdev.h"
namespace ui {
namespace {
// Thread safe dispatcher proxy for EventFactoryEvdev.
class ProxyDeviceEventDispatcher : public DeviceEventDispatcherEvdev {
public:
ProxyDeviceEventDispatcher(
scoped_refptr<base::SingleThreadTaskRunner> ui_thread_runner,
base::WeakPtr<EventFactoryEvdev> event_factory_evdev)
: ui_thread_runner_(ui_thread_runner),
event_factory_evdev_(event_factory_evdev) {}
~ProxyDeviceEventDispatcher() override {}
// DeviceEventDispatcher:
void DispatchKeyEvent(const KeyEventParams& params) override {
ui_thread_runner_->PostTask(FROM_HERE,
base::Bind(&EventFactoryEvdev::DispatchKeyEvent,
event_factory_evdev_, params));
}
void DispatchMouseMoveEvent(const MouseMoveEventParams& params) override {
ui_thread_runner_->PostTask(
FROM_HERE, base::Bind(&EventFactoryEvdev::DispatchMouseMoveEvent,
event_factory_evdev_, params));
}
void DispatchMouseButtonEvent(const MouseButtonEventParams& params) override {
ui_thread_runner_->PostTask(
FROM_HERE, base::Bind(&EventFactoryEvdev::DispatchMouseButtonEvent,
event_factory_evdev_, params));
}
void DispatchMouseWheelEvent(const MouseWheelEventParams& params) override {
ui_thread_runner_->PostTask(
FROM_HERE, base::Bind(&EventFactoryEvdev::DispatchMouseWheelEvent,
event_factory_evdev_, params));
}
void DispatchScrollEvent(const ScrollEventParams& params) override {
ui_thread_runner_->PostTask(
FROM_HERE, base::Bind(&EventFactoryEvdev::DispatchScrollEvent,
event_factory_evdev_, params));
}
void DispatchTouchEvent(const TouchEventParams& params) override {
ui_thread_runner_->PostTask(
FROM_HERE, base::Bind(&EventFactoryEvdev::DispatchTouchEvent,
event_factory_evdev_, params));
}
void DispatchKeyboardDevicesUpdated(
const std::vector<KeyboardDevice>& devices) override {
ui_thread_runner_->PostTask(
FROM_HERE,
base::Bind(&EventFactoryEvdev::DispatchKeyboardDevicesUpdated,
event_factory_evdev_, devices));
}
void DispatchTouchscreenDevicesUpdated(
const std::vector<TouchscreenDevice>& devices) override {
ui_thread_runner_->PostTask(
FROM_HERE,
base::Bind(&EventFactoryEvdev::DispatchTouchscreenDevicesUpdated,
event_factory_evdev_, devices));
}
void DispatchMouseDevicesUpdated(
const std::vector<InputDevice>& devices) override {
ui_thread_runner_->PostTask(
FROM_HERE, base::Bind(&EventFactoryEvdev::DispatchMouseDevicesUpdated,
event_factory_evdev_, devices));
}
void DispatchTouchpadDevicesUpdated(
const std::vector<InputDevice>& devices) override {
ui_thread_runner_->PostTask(
FROM_HERE,
base::Bind(&EventFactoryEvdev::DispatchTouchpadDevicesUpdated,
event_factory_evdev_, devices));
}
private:
scoped_refptr<base::SingleThreadTaskRunner> ui_thread_runner_;
base::WeakPtr<EventFactoryEvdev> event_factory_evdev_;
};
} // namespace
EventFactoryEvdev::EventFactoryEvdev(CursorDelegateEvdev* cursor,
DeviceManager* device_manager,
KeyboardLayoutEngine* keyboard_layout)
: last_device_id_(0),
device_manager_(device_manager),
keyboard_(&modifiers_,
keyboard_layout,
base::Bind(&EventFactoryEvdev::DispatchUiEvent,
base::Unretained(this))),
cursor_(cursor),
input_controller_(&keyboard_, &button_map_),
initialized_(false),
weak_ptr_factory_(this) {
DCHECK(device_manager_);
}
EventFactoryEvdev::~EventFactoryEvdev() {
}
void EventFactoryEvdev::Init() {
DCHECK(!initialized_);
// Set up device factory.
scoped_ptr<DeviceEventDispatcherEvdev> dispatcher(
new ProxyDeviceEventDispatcher(base::ThreadTaskRunnerHandle::Get(),
weak_ptr_factory_.GetWeakPtr()));
input_device_factory_.reset(
new InputDeviceFactoryEvdev(dispatcher.Pass(), cursor_));
input_device_factory_proxy_.reset(
new InputDeviceFactoryEvdevProxy(base::ThreadTaskRunnerHandle::Get(),
input_device_factory_->GetWeakPtr()));
// TODO(spang): This settings interface is really broken. crbug.com/450899
input_controller_.SetInputDeviceFactory(input_device_factory_proxy_.get());
// Scan & monitor devices.
device_manager_->AddObserver(this);
device_manager_->ScanDevices(this);
initialized_ = true;
}
scoped_ptr<SystemInputInjector> EventFactoryEvdev::CreateSystemInputInjector() {
// Use forwarding dispatcher for the injector rather than dispatching
// directly. We cannot assume it is safe to (re-)enter ui::Event dispatch
// synchronously from the injection point.
scoped_ptr<DeviceEventDispatcherEvdev> dispatcher(
new ProxyDeviceEventDispatcher(base::ThreadTaskRunnerHandle::Get(),
weak_ptr_factory_.GetWeakPtr()));
return make_scoped_ptr(new InputInjectorEvdev(dispatcher.Pass(), cursor_));
}
void EventFactoryEvdev::DispatchKeyEvent(const KeyEventParams& params) {
keyboard_.OnKeyChange(params.code, params.down);
}
void EventFactoryEvdev::DispatchMouseMoveEvent(
const MouseMoveEventParams& params) {
MouseEvent event(ui::ET_MOUSE_MOVED, params.location, params.location,
modifiers_.GetModifierFlags(),
/* changed_button_flags */ 0);
event.set_source_device_id(params.device_id);
DispatchUiEvent(&event);
}
void EventFactoryEvdev::DispatchMouseButtonEvent(
const MouseButtonEventParams& params) {
// Mouse buttons can be remapped, touchpad taps & clicks cannot.
unsigned int button = params.button;
if (params.allow_remap)
button = button_map_.GetMappedButton(button);
int modifier = EVDEV_MODIFIER_NONE;
switch (button) {
case BTN_LEFT:
modifier = EVDEV_MODIFIER_LEFT_MOUSE_BUTTON;
break;
case BTN_RIGHT:
modifier = EVDEV_MODIFIER_RIGHT_MOUSE_BUTTON;
break;
case BTN_MIDDLE:
modifier = EVDEV_MODIFIER_MIDDLE_MOUSE_BUTTON;
break;
default:
return;
}
int flag = modifiers_.GetEventFlagFromModifier(modifier);
modifiers_.UpdateModifier(modifier, params.down);
MouseEvent event(params.down ? ui::ET_MOUSE_PRESSED : ui::ET_MOUSE_RELEASED,
params.location, params.location,
modifiers_.GetModifierFlags() | flag,
/* changed_button_flags */ flag);
event.set_source_device_id(params.device_id);
DispatchUiEvent(&event);
}
void EventFactoryEvdev::DispatchMouseWheelEvent(
const MouseWheelEventParams& params) {
MouseWheelEvent event(params.delta, params.location, params.location,
modifiers_.GetModifierFlags(),
0 /* changed_button_flags */);
event.set_source_device_id(params.device_id);
DispatchUiEvent(&event);
}
void EventFactoryEvdev::DispatchScrollEvent(const ScrollEventParams& params) {
ScrollEvent event(params.type, params.location, params.timestamp,
modifiers_.GetModifierFlags(), params.delta.x(),
params.delta.y(), params.ordinal_delta.x(),
params.ordinal_delta.y(), params.finger_count);
event.set_source_device_id(params.device_id);
DispatchUiEvent(&event);
}
void EventFactoryEvdev::DispatchTouchEvent(const TouchEventParams& params) {
float x = params.location.x();
float y = params.location.y();
double radius_x = params.radii.x();
double radius_y = params.radii.y();
// Transform the event to align touches to the image based on display mode.
DeviceDataManager::GetInstance()->ApplyTouchTransformer(params.device_id, &x,
&y);
DeviceDataManager::GetInstance()->ApplyTouchRadiusScale(params.device_id,
&radius_x);
DeviceDataManager::GetInstance()->ApplyTouchRadiusScale(params.device_id,
&radius_y);
TouchEvent touch_event(params.type, gfx::PointF(x, y),
modifiers_.GetModifierFlags(), params.touch_id,
params.timestamp, radius_x, radius_y,
/* angle */ 0.f, params.pressure);
touch_event.set_source_device_id(params.device_id);
DispatchUiEvent(&touch_event);
}
void EventFactoryEvdev::DispatchUiEvent(Event* event) {
// DispatchEvent takes PlatformEvent which is void*. This function
// wraps it with the real type.
DispatchEvent(event);
}
void EventFactoryEvdev::DispatchKeyboardDevicesUpdated(
const std::vector<KeyboardDevice>& devices) {
DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
observer->OnKeyboardDevicesUpdated(devices);
}
void EventFactoryEvdev::DispatchTouchscreenDevicesUpdated(
const std::vector<TouchscreenDevice>& devices) {
DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
observer->OnTouchscreenDevicesUpdated(devices);
}
void EventFactoryEvdev::DispatchMouseDevicesUpdated(
const std::vector<InputDevice>& devices) {
// There's no list of mice in DeviceDataManager.
input_controller_.set_has_mouse(devices.size() != 0);
}
void EventFactoryEvdev::DispatchTouchpadDevicesUpdated(
const std::vector<InputDevice>& devices) {
// There's no list of touchpads in DeviceDataManager.
input_controller_.set_has_touchpad(devices.size() != 0);
}
void EventFactoryEvdev::OnDeviceEvent(const DeviceEvent& event) {
if (event.device_type() != DeviceEvent::INPUT)
return;
switch (event.action_type()) {
case DeviceEvent::ADD:
case DeviceEvent::CHANGE: {
TRACE_EVENT1("ozone", "OnDeviceAdded", "path", event.path().value());
input_device_factory_proxy_->AddInputDevice(NextDeviceId(), event.path());
break;
}
case DeviceEvent::REMOVE: {
TRACE_EVENT1("ozone", "OnDeviceRemoved", "path", event.path().value());
input_device_factory_proxy_->RemoveInputDevice(event.path());
break;
}
}
}
void EventFactoryEvdev::OnDispatcherListChanged() {
if (!initialized_)
Init();
}
void EventFactoryEvdev::WarpCursorTo(gfx::AcceleratedWidget widget,
const gfx::PointF& location) {
if (!cursor_)
return;
cursor_->MoveCursorTo(widget, location);
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(&EventFactoryEvdev::DispatchMouseMoveEvent,
weak_ptr_factory_.GetWeakPtr(),
MouseMoveEventParams(-1 /* device_id */,
cursor_->GetLocation())));
}
int EventFactoryEvdev::NextDeviceId() {
return ++last_device_id_;
}
} // namespace ui
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