1 files changed, 52 insertions, 0 deletions
diff --git a/xfa/fwl/core/ifwl_target.h b/xfa/fwl/core/ifwl_target.h
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+++ b/xfa/fwl/core/ifwl_target.h
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+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef XFA_FWL_CORE_IFWL_TARGET_H_
+#define XFA_FWL_CORE_IFWL_TARGET_H_
+
+#include "core/fxcrt/include/fx_basic.h"
+#include "xfa/fwl/core/fwl_error.h"
+
+// FWL contains three parallel inheritance hierarchies, which reference each
+// other via pointers as follows:
+//
+//                                           m_pImpl
+//      (nonesuch)              IFWL_Target ----------> CFWL_TargetImp
+//                                   |                       |
+//                                   A                       A
+//                   m_pIface        |                       |
+//      CFWL_Widget ----------> IFWL_Widget             CFWL_WidgetImp
+//           |                       |                       |
+//           A                       A                       A
+//           |                       |                       |
+//      CFWL_...                IFWL_...                CFWL_...Imp
+//
+
+class CFWL_TargetImp;
+
+class IFWL_Target {
+ public:
+  IFWL_Target() : m_pImpl(nullptr) {}
+  virtual ~IFWL_Target();
+
+  // These call into equivalent polymorphic methods of m_pImpl. There
+  // should be no need to override these in subclasses.
+  FWL_ERR GetClassName(CFX_WideString& wsClass) const;
+  FX_DWORD GetClassID() const;
+  FX_BOOL IsInstance(const CFX_WideStringC& wsClass) const;
+  FWL_ERR Initialize();
+  FWL_ERR Finalize();
+
+  CFWL_TargetImp* GetImpl() const { return m_pImpl; }
+
+ protected:
+  void SetImpl(CFWL_TargetImp* pImpl) { m_pImpl = pImpl; }
+
+ private:
+  CFWL_TargetImp* m_pImpl;
+};
+
+#endif  // XFA_FWL_CORE_IFWL_TARGET_H_