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

ui/events/ozone/evdev/event_converter_evdev.h

+// 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.
+
+#ifndef UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_H_
+#define UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_H_
+
+#include <set>
+
+#include "base/callback.h"
+#include "base/files/file_path.h"
+#include "base/message_loop/message_loop.h"
+#include "ui/events/devices/input_device.h"
+#include "ui/events/ozone/evdev/event_dispatch_callback.h"
+#include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
+#include "ui/gfx/geometry/size.h"
+
+struct input_event;
+
+namespace ui {
+enum class DomCode;
+
+class EVENTS_OZONE_EVDEV_EXPORT EventConverterEvdev
+    : public base::MessagePumpLibevent::Watcher {
+ public:
+  EventConverterEvdev(int fd,
+                      const base::FilePath& path,
+                      int id,
+                      InputDeviceType type,
+                      const std::string& name,
+                      uint16_t vendor_id,
+                      uint16_t product_id);
+  ~EventConverterEvdev() override;
+
+  int id() const { return input_device_.id; }
+
+  const base::FilePath& path() const { return path_; }
+
+  InputDeviceType type() const { return input_device_.type; }
+
+  const InputDevice& input_device() const { return input_device_; }
+
+  // Start reading events.
+  void Start();
+
+  // Stop reading events.
+  void Stop();
+
+  // Enable or disable this device. A disabled device still polls for
+  // input and can update state but must not dispatch any events to UI.
+  void SetEnabled(bool enabled);
+
+  // Cleanup after we stop reading events (release buttons, etc).
+  virtual void OnStopped();
+
+  // Prepare for disable (e.g. should release keys/buttons/touches).
+  virtual void OnDisabled();
+
+  // Start or restart (e.g. should reapply keys/buttons/touches).
+  virtual void OnEnabled();
+
+  // Returns true if the converter is used for a keyboard device.
+  virtual bool HasKeyboard() const;
+
+  // Returns true if the converter is used for a mouse device;
+  virtual bool HasMouse() const;
+
+  // Returns true if the converter is used for a touchpad device.
+  virtual bool HasTouchpad() const;
+
+  // Returns true if the converter is used for a touchscreen device.
+  virtual bool HasTouchscreen() const;
+
+  // Returns true if the converter is used for a device with a caps lock LED.
+  virtual bool HasCapsLockLed() const;
+
+  // Returns the size of the touchscreen device if the converter is used for a
+  // touchscreen device.
+  virtual gfx::Size GetTouchscreenSize() const;
+
+  // Returns the number of touch points this device supports. Should not be
+  // called unless HasTouchscreen() returns true
+  virtual int GetTouchPoints() const;
+
+  // Sets which keyboard keys should be processed. If |enable_filter| is
+  // false, all keys are allowed and |allowed_keys| is ignored.
+  virtual void SetKeyFilter(bool enable_filter,
+                            std::vector<DomCode> allowed_keys);
+
+  // Update caps lock LED state.
+  virtual void SetCapsLockLed(bool enabled);
+
+  // Helper to generate a base::TimeDelta from an input_event's time
+  static base::TimeDelta TimeDeltaFromInputEvent(const input_event& event);
+
+ protected:
+  // base::MessagePumpLibevent::Watcher:
+  void OnFileCanWriteWithoutBlocking(int fd) override;
+
+  // File descriptor to read.
+  int fd_;
+
+  // Path to input device.
+  base::FilePath path_;
+
+  // Input device information, including id (which uniquely identifies an
+  // event converter) and type.
+  InputDevice input_device_;
+
+  // Whether we're polling for input on the device.
+  bool watching_ = false;
+
+  // Whether events should be dispatched to UI.
+  bool enabled_ = false;
+
+  // Controller for watching the input fd.
+  base::MessagePumpLibevent::FileDescriptorWatcher controller_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(EventConverterEvdev);
+};
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_OZONE_EVDEV_EVENT_CONVERTER_EVDEV_H_