remoting/client/plugin/pepper_mouse_locker.h

   1 // Copyright 2014 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 REMOTING_CLIENT_PLUGIN_PEPPER_MOUSE_LOCKER_H_
   6 #define REMOTING_CLIENT_PLUGIN_PEPPER_MOUSE_LOCKER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "ppapi/cpp/mouse_lock.h"
  11 #include "ppapi/utility/completion_callback_factory.h"
  12 #include "remoting/protocol/cursor_shape_stub.h"
  13
  14 namespace pp {
  15 class Instance;
  16 }  // namespace pp
  17
  18 namespace remoting {
  19
  20 class PepperInputHandler;
  21
  22 class PepperMouseLocker : public pp::MouseLock,
  23                           public protocol::CursorShapeStub {
  24  public:
  25   // |instance| and |cursor_stub| must outlive |this|.
  26   PepperMouseLocker(
  27       pp::Instance* instance,
  28       const base::Callback<void(bool)>& enable_mouse_deltas,
  29       protocol::CursorShapeStub* cursor_stub);
  30   ~PepperMouseLocker() override;
  31
  32   // Must be called when the plugin receives or loses focus.
  33   void DidChangeFocus(bool has_focus);
  34
  35   // protocol::CursorShapeStub interface.
  36   void SetCursorShape(const protocol::CursorShapeInfo& cursor_shape) override;
  37
  38 private:
  39   enum MouseLockState {
  40     MouseLockOff,
  41     MouseLockRequestPending,
  42     MouseLockOn,
  43     MouseLockCancelling
  44   };
  45
  46   // pp::MouseLock interface.
  47   void MouseLockLost() override;
  48
  49   // Handles completion of the mouse lock request issued by RequestMouseLock().
  50   void OnMouseLocked(int error);
  51
  52   // Sets the mouse-lock state to "off" and restores the normal mouse cursor.
  53   void OnMouseLockOff();
  54
  55   // Requests the browser to lock the mouse and hides the cursor.
  56   void RequestMouseLock();
  57
  58   // Requests the browser to cancel mouse lock and restores the cursor once
  59   // the lock is gone.
  60   void CancelMouseLock();
  61
  62   // Callback used to enable/disable delta motion fields in mouse events.
  63   base::Callback<void(bool)> enable_mouse_deltas_;
  64
  65   // Stub used to set the cursor that will actually be displayed.
  66   protocol::CursorShapeStub* cursor_stub_;
  67
  68   // Copy of the most-recently-set cursor, to set when mouse-lock is cancelled.
  69   scoped_ptr<protocol::CursorShapeInfo> cursor_shape_;
  70
  71   // Used to create PPAPI callbacks that will be abandoned when |this| is
  72   // deleted.
  73   pp::CompletionCallbackFactory<PepperMouseLocker> callback_factory_;
  74
  75   // True if the plugin has focus.
  76   bool has_focus_;
  77
  78   // Holds the current mouse lock state.
  79   MouseLockState mouse_lock_state_;
  80
  81   DISALLOW_COPY_AND_ASSIGN(PepperMouseLocker);
  82 };
  83
  84 }  // namespace remoting
  85
  86 #endif  // REMOTING_CLIENT_PLUGIN_PEPPER_MOUSE_LOCKER_H_