1 files changed, 135 insertions, 0 deletions
diff --git a/xbmc/windowing/wayland/SeatInputProcessing.h b/xbmc/windowing/wayland/SeatInputProcessing.h
new file mode 100644
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+++ b/xbmc/windowing/wayland/SeatInputProcessing.h
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+/*
+ *  Copyright (C) 2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include "InputProcessorKeyboard.h"
+#include "InputProcessorPointer.h"
+#include "InputProcessorTouch.h"
+#include "Seat.h"
+
+#include <cstdint>
+#include <map>
+#include <memory>
+
+#include <wayland-client-protocol.hpp>
+
+namespace KODI
+{
+namespace WINDOWING
+{
+namespace WAYLAND
+{
+
+enum class InputType
+{
+  POINTER,
+  KEYBOARD,
+  TOUCH
+};
+
+/**
+ * Handler interface for input events from \ref CSeatInputProcessor
+ */
+class IInputHandler
+{
+public:
+  /**
+   * Handle input event
+   * \param type input device type that caused the event
+   * \param event XBMC event data
+   */
+  virtual void OnEvent(InputType type, XBMC_Event& event) {}
+  /**
+   * Handle focus enter
+   * \param type input device type for which the surface has gained the focus
+   */
+  virtual void OnEnter(InputType type) {}
+  /**
+   * Handle focus leave
+   * \param type input device type for which the surface has lost the focus
+   */
+  virtual void OnLeave(InputType type) {}
+  /**
+   * Handle request for setting the cursor
+   *
+   * When the client gains pointer focus for a surface, a cursor image must be
+   * attached to the pointer. Otherwise the previous pointer image would
+   * be used.
+   *
+   * This request is sent in addition to \ref OnEnter for \ref InputType::POINTER.
+   *
+   * \param seatGlobalName numeric Wayland global name of the seat the event occurred on
+   * \param pointer pointer instance that needs its cursor set
+   * \param serial Wayland protocol message serial that must be sent back in set_cursor
+   */
+  virtual void OnSetCursor(std::uint32_t seatGlobalName, std::uint32_t serial) {}
+
+  virtual ~IInputHandler() = default;
+};
+
+/**
+ * Receive events from all registered wl_seats and process them into Kodi events
+ *
+ * Multi-seat support is not currently implemented completely, but each seat has
+ * separate state.
+ */
+class CSeatInputProcessing final : IInputHandlerPointer, IInputHandlerKeyboard
+{
+public:
+  /**
+   * Construct a seat input processor
+   *
+   * \param inputSurface Surface that events should be processed on (all other surfaces are ignored)
+   * \param handler Mandatory handler for processed input events
+   */
+  CSeatInputProcessing(wayland::surface_t const& inputSurface, IInputHandler& handler);
+  void AddSeat(CSeat* seat);
+  void RemoveSeat(CSeat* seat);
+
+  /**
+   * Set the scale the coordinates should be interpreted at
+   *
+   * Wayland input events are always in surface coordinates, but Kodi only uses
+   * buffer coordinates internally. Use this function to set the scaling
+   * factor between the two and multiply the surface coordinates accordingly
+   * for Kodi events.
+   *
+   * \param scale new buffer-to-surface pixel ratio
+   */
+  void SetCoordinateScale(std::int32_t scale);
+
+private:
+  wayland::surface_t m_inputSurface;
+  IInputHandler& m_handler;
+
+  void OnPointerEnter(std::uint32_t seatGlobalName, std::uint32_t serial) override;
+  void OnPointerLeave() override;
+  void OnPointerEvent(XBMC_Event& event) override;
+
+  void OnKeyboardEnter() override;
+  void OnKeyboardLeave() override;
+  void OnKeyboardEvent(XBMC_Event& event) override;
+
+  struct SeatState
+  {
+    CSeat* seat;
+    std::unique_ptr<CInputProcessorKeyboard> keyboardProcessor;
+    std::unique_ptr<CInputProcessorPointer> pointerProcessor;
+    std::unique_ptr<CInputProcessorTouch> touchProcessor;
+
+    SeatState(CSeat* seat)
+    : seat{seat}
+    {}
+  };
+  std::map<std::uint32_t, SeatState> m_seats;
+};
+
+}
+}
+}