ui/ozone/ozone_platform.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_OZONE_OZONE_PLATFORM_H_
   6 #define UI_OZONE_OZONE_PLATFORM_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "ui/events/ozone/event_factory_ozone.h"
  10 #include "ui/gfx/ozone/surface_factory_ozone.h"
  11 #include "ui/ozone/ime/input_method_context_factory_ozone.h"
  12 #include "ui/ozone/ozone_export.h"
  13
  14 namespace ui {
  15
  16 // Base class for Ozone platform implementations.
  17 //
  18 // Ozone platforms must override this class and implement the virtual
  19 // GetFooFactoryOzone() methods to provide implementations of the
  20 // various ozone interfaces.
  21 //
  22 // The OzonePlatform subclass can own any state needed by the
  23 // implementation that is shared between the various ozone interfaces,
  24 // such as a connection to the windowing system.
  25 //
  26 // A platform is free to use different implementations of each
  27 // interface depending on the context. You can, for example, create
  28 // different objects depending on the underlying hardware, command
  29 // line flags, or whatever is appropriate for the platform.
  30 class OZONE_EXPORT OzonePlatform {
  31  public:
  32   OzonePlatform();
  33   virtual ~OzonePlatform();
  34
  35   // Initialize the platform. Once complete, SurfaceFactoryOzone &
  36   // EventFactoryOzone will be set.
  37   static void Initialize();
  38
  39   // Factory getters to override in subclasses. The returned objects will be
  40   // injected into the appropriate layer at startup. Subclasses should not
  41   // inject these objects themselves. Ownership is retained by OzonePlatform.
  42   virtual gfx::SurfaceFactoryOzone* GetSurfaceFactoryOzone() = 0;
  43   virtual ui::EventFactoryOzone* GetEventFactoryOzone() = 0;
  44   virtual ui::InputMethodContextFactoryOzone*
  45       GetInputMethodContextFactoryOzone() = 0;
  46
  47  private:
  48   static OzonePlatform* instance_;
  49
  50   DISALLOW_COPY_AND_ASSIGN(OzonePlatform);
  51 };
  52
  53 }  // namespace ui
  54
  55 #endif  // UI_OZONE_OZONE_PLATFORM_H_