text: // Copyright 2016 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/ozone/platform/wayland/ozone_platform_wayland.h"
  
  #include "base/memory/ptr_util.h"
  #include "ui/display/fake_display_delegate.h"
  #include "ui/ozone/common/stub_overlay_manager.h"
  #include "ui/ozone/platform/wayland/wayland_connection.h"
  #include "ui/ozone/platform/wayland/wayland_surface_factory.h"
  #include "ui/ozone/platform/wayland/wayland_window.h"
  #include "ui/ozone/public/cursor_factory_ozone.h"
  #include "ui/ozone/public/gpu_platform_support_host.h"
  #include "ui/ozone/public/input_controller.h"
  #include "ui/ozone/public/ozone_platform.h"
  #include "ui/ozone/public/system_input_injector.h"
  
  namespace ui {
  
  namespace {
  
  class OzonePlatformWayland : public OzonePlatform {
   public:
    OzonePlatformWayland() {}
    ~OzonePlatformWayland() override {}
  
    // OzonePlatform
    SurfaceFactoryOzone* GetSurfaceFactoryOzone() override {
      return surface_factory_.get();
    }
  
    OverlayManagerOzone* GetOverlayManager() override {
      return overlay_manager_.get();
    }
  
    CursorFactoryOzone* GetCursorFactoryOzone() override {
      return cursor_factory_.get();
    }
  
    InputController* GetInputController() override {
      return input_controller_.get();
    }
  
    GpuPlatformSupportHost* GetGpuPlatformSupportHost() override {
      return gpu_platform_support_host_.get();
    }
  
    std::unique_ptr<SystemInputInjector> CreateSystemInputInjector() override {
      return nullptr;
    }
  
    std::unique_ptr<PlatformWindow> CreatePlatformWindow(
        PlatformWindowDelegate* delegate,
        const gfx::Rect& bounds) override {
      auto window =
          base::MakeUnique<WaylandWindow>(delegate, connection_.get(), bounds);
      if (!window->Initialize())
        return nullptr;
      return std::move(window);
    }
  
    std::unique_ptr<display::NativeDisplayDelegate> CreateNativeDisplayDelegate()
        override {
      return base::MakeUnique<display::FakeDisplayDelegate>();
    }
  
    void InitializeUI() override {
      InitParams default_params;
      InitializeUI(default_params);
    }
  
    void InitializeUI(const InitParams& args) override {
      connection_.reset(new WaylandConnection);
      if (!connection_->Initialize())
        LOG(FATAL) << "Failed to initialize Wayland platform";
  
      cursor_factory_.reset(new CursorFactoryOzone);
      overlay_manager_.reset(new StubOverlayManager);
      input_controller_ = CreateStubInputController();
      surface_factory_.reset(new WaylandSurfaceFactory(connection_.get()));
      gpu_platform_support_host_.reset(CreateStubGpuPlatformSupportHost());
    }
  
    void InitializeGPU() override {
      InitParams default_params;
      InitializeGPU(default_params);
    }
  
    void InitializeGPU(const InitParams& args) override {
      // TODO(fwang): args.single_process parameter should be checked here; make
      // sure callers pass in the proper value. Once it happens, the check whether
      // surface factory was set in the same process by a previous InitializeUI
      // call becomes unneeded.
      if (!surface_factory_) {
        // TODO(fwang): Separate processes can not share a Wayland connection
        // and so the current implementations of GLOzoneEGLWayland and
        // WaylandCanvasSurface may only work when UI and GPU live in the same
        // process. GetSurfaceFactoryOzone() must be non-null so a dummy instance
        // of WaylandSurfaceFactory is needed to make the GPU initialization
        // gracefully fail.
        surface_factory_.reset(new WaylandSurfaceFactory(nullptr));
      }
    }
  
   private:
    std::unique_ptr<WaylandConnection> connection_;
    std::unique_ptr<WaylandSurfaceFactory> surface_factory_;
    std::unique_ptr<CursorFactoryOzone> cursor_factory_;
    std::unique_ptr<StubOverlayManager> overlay_manager_;
    std::unique_ptr<InputController> input_controller_;
    std::unique_ptr<GpuPlatformSupportHost> gpu_platform_support_host_;
  
    DISALLOW_COPY_AND_ASSIGN(OzonePlatformWayland);
  };
  
  }  // namespace
  
  OzonePlatform* CreateOzonePlatformWayland() {
    return new OzonePlatformWayland;
  }
  
  }  // namespace ui
  