Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/ozone/evdev/event_factory_evdev.cc

+// 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/task_runner.h"
+#include "base/thread_task_runner_handle.h"
+#include "base/threading/worker_pool.h"
+#include "base/time/time.h"
+#include "base/trace_event/trace_event.h"
+#include "ui/events/devices/device_data_manager.h"
+#include "ui/events/devices/input_device.h"
+#include "ui/events/event_utils.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"
+#include "ui/events/ozone/evdev/touch_evdev_types.h"
+
+namespace ui {
+
+namespace {
+
+// Thread safe dispatcher proxy for EventFactoryEvdev.
+//
+// This is used on the device I/O thread for dispatching to UI.
+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));
+  }
+  void DispatchDeviceListsComplete() override {
+    ui_thread_runner_->PostTask(
+        FROM_HERE, base::Bind(&EventFactoryEvdev::DispatchDeviceListsComplete,
+                              event_factory_evdev_));
+  }
+
+ 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)
+    : device_manager_(device_manager),
+      keyboard_(&modifiers_,
+                keyboard_layout,
+                base::Bind(&EventFactoryEvdev::DispatchUiEvent,
+                           base::Unretained(this))),
+      cursor_(cursor),
+      input_controller_(&keyboard_, &button_map_),
+      touch_id_generator_(0),
+      weak_ptr_factory_(this) {
+  DCHECK(device_manager_);
+}
+
+EventFactoryEvdev::~EventFactoryEvdev() {
+}
+
+void EventFactoryEvdev::Init() {
+  DCHECK(!initialized_);
+
+  StartThread();
+
+  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> proxy_dispatcher(
+      new ProxyDeviceEventDispatcher(base::ThreadTaskRunnerHandle::Get(),
+                                     weak_ptr_factory_.GetWeakPtr()));
+  return make_scoped_ptr(
+      new InputInjectorEvdev(proxy_dispatcher.Pass(), cursor_));
+}
+
+void EventFactoryEvdev::DispatchKeyEvent(const KeyEventParams& params) {
+  TRACE_EVENT1("evdev", "EventFactoryEvdev::DispatchKeyEvent", "device",
+               params.device_id);
+  keyboard_.OnKeyChange(params.code, params.down, params.suppress_auto_repeat,
+                        params.timestamp, params.device_id);
+}
+
+void EventFactoryEvdev::DispatchMouseMoveEvent(
+    const MouseMoveEventParams& params) {
+  TRACE_EVENT1("evdev", "EventFactoryEvdev::DispatchMouseMoveEvent", "device",
+               params.device_id);
+  MouseEvent event(ui::ET_MOUSE_MOVED, params.location, params.location,
+                   params.timestamp, modifiers_.GetModifierFlags(),
+                   /* changed_button_flags */ 0);
+  event.set_source_device_id(params.device_id);
+  DispatchUiEvent(&event);
+}
+
+void EventFactoryEvdev::DispatchMouseButtonEvent(
+    const MouseButtonEventParams& params) {
+  TRACE_EVENT1("evdev", "EventFactoryEvdev::DispatchMouseButtonEvent", "device",
+               params.device_id);
+
+  // 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;
+    case BTN_BACK:
+      modifier = EVDEV_MODIFIER_BACK_MOUSE_BUTTON;
+      break;
+    case BTN_FORWARD:
+      modifier = EVDEV_MODIFIER_FORWARD_MOUSE_BUTTON;
+      break;
+    default:
+      return;
+  }
+
+  int flag = modifiers_.GetEventFlagFromModifier(modifier);
+  bool was_down = modifiers_.GetModifierFlags() & flag;
+  modifiers_.UpdateModifier(modifier, params.down);
+  bool down = modifiers_.GetModifierFlags() & flag;
+
+  // Suppress nested clicks. EventModifiersEvdev counts presses, we only
+  // dispatch an event on 0-1 (first press) and 1-0 (last release) transitions.
+  if (down == was_down)
+    return;
+
+  MouseEvent event(params.down ? ui::ET_MOUSE_PRESSED : ui::ET_MOUSE_RELEASED,
+                   params.location, params.location, params.timestamp,
+                   modifiers_.GetModifierFlags() | flag,
+                   /* changed_button_flags */ flag);
+  event.set_source_device_id(params.device_id);
+  DispatchUiEvent(&event);
+}
+
+void EventFactoryEvdev::DispatchMouseWheelEvent(
+    const MouseWheelEventParams& params) {
+  TRACE_EVENT1("evdev", "EventFactoryEvdev::DispatchMouseWheelEvent", "device",
+               params.device_id);
+  MouseWheelEvent event(params.delta, params.location, params.location,
+                        params.timestamp, modifiers_.GetModifierFlags(),
+                        0 /* changed_button_flags */);
+  event.set_source_device_id(params.device_id);
+  DispatchUiEvent(&event);
+}
+
+void EventFactoryEvdev::DispatchScrollEvent(const ScrollEventParams& params) {
+  TRACE_EVENT1("evdev", "EventFactoryEvdev::DispatchScrollEvent", "device",
+               params.device_id);
+  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) {
+  TRACE_EVENT1("evdev", "EventFactoryEvdev::DispatchTouchEvent", "device",
+               params.device_id);
+
+  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);
+
+  // params.slot is guaranteed to be < kNumTouchEvdevSlots.
+  int touch_id = touch_id_generator_.GetGeneratedID(
+      params.device_id * kNumTouchEvdevSlots + params.slot);
+  TouchEvent touch_event(params.type, gfx::PointF(x, y),
+                         modifiers_.GetModifierFlags(), 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);
+
+  if (params.type == ET_TOUCH_RELEASED || params.type == ET_TOUCH_CANCELLED) {
+    touch_id_generator_.ReleaseGeneratedID(touch_event.touch_id());
+  }
+}
+
+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) {
+  TRACE_EVENT0("evdev", "EventFactoryEvdev::DispatchKeyboardDevicesUpdated");
+  DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
+  observer->OnKeyboardDevicesUpdated(devices);
+}
+
+void EventFactoryEvdev::DispatchTouchscreenDevicesUpdated(
+    const std::vector<TouchscreenDevice>& devices) {
+  TRACE_EVENT0("evdev", "EventFactoryEvdev::DispatchTouchscreenDevicesUpdated");
+  DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
+  observer->OnTouchscreenDevicesUpdated(devices);
+}
+
+void EventFactoryEvdev::DispatchMouseDevicesUpdated(
+    const std::vector<InputDevice>& devices) {
+  TRACE_EVENT0("evdev", "EventFactoryEvdev::DispatchMouseDevicesUpdated");
+
+  // There's no list of mice in DeviceDataManager.
+  input_controller_.set_has_mouse(devices.size() != 0);
+  DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
+  observer->OnMouseDevicesUpdated(devices);
+}
+
+void EventFactoryEvdev::DispatchTouchpadDevicesUpdated(
+    const std::vector<InputDevice>& devices) {
+  TRACE_EVENT0("evdev", "EventFactoryEvdev::DispatchTouchpadDevicesUpdated");
+
+  // There's no list of touchpads in DeviceDataManager.
+  input_controller_.set_has_touchpad(devices.size() != 0);
+  DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
+  observer->OnTouchpadDevicesUpdated(devices);
+}
+
+void EventFactoryEvdev::DispatchDeviceListsComplete() {
+  TRACE_EVENT0("evdev", "EventFactoryEvdev::DispatchDeviceListsComplete");
+  DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
+  observer->OnDeviceListsComplete();
+}
+
+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("evdev", "EventFactoryEvdev::OnDeviceAdded", "path",
+                   event.path().value());
+      input_device_factory_proxy_->AddInputDevice(NextDeviceId(), event.path());
+      break;
+    }
+    case DeviceEvent::REMOVE: {
+      TRACE_EVENT1("evdev", "EventFactoryEvdev::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(),
+                                                 EventTimeForNow())));
+}
+
+int EventFactoryEvdev::NextDeviceId() {
+  return ++last_device_id_;
+}
+
+void EventFactoryEvdev::StartThread() {
+  // Set up device factory.
+  scoped_ptr<DeviceEventDispatcherEvdev> proxy_dispatcher(
+      new ProxyDeviceEventDispatcher(base::ThreadTaskRunnerHandle::Get(),
+                                     weak_ptr_factory_.GetWeakPtr()));
+  thread_.Start(proxy_dispatcher.Pass(), cursor_,
+                base::Bind(&EventFactoryEvdev::OnThreadStarted,
+                           weak_ptr_factory_.GetWeakPtr()));
+}
+
+void EventFactoryEvdev::OnThreadStarted(
+    scoped_ptr<InputDeviceFactoryEvdevProxy> input_device_factory) {
+  TRACE_EVENT0("evdev", "EventFactoryEvdev::OnThreadStarted");
+  input_device_factory_proxy_ = input_device_factory.Pass();
+
+  // Hook up device configuration.
+  input_controller_.SetInputDeviceFactory(input_device_factory_proxy_.get());
+
+  // Scan & monitor devices.
+  device_manager_->AddObserver(this);
+  device_manager_->ScanDevices(this);
+
+  // Notify device thread that initial scan is done.
+  input_device_factory_proxy_->OnStartupScanComplete();
+}
+
+}  // namespace ui