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diff --git a/fpdfsdk/pwl/cpwl_appstream.h b/fpdfsdk/pwl/cpwl_appstream.h
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+// Copyright 2017 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 FPDFSDK_PWL_CPWL_APPSTREAM_H_
+#define FPDFSDK_PWL_CPWL_APPSTREAM_H_
+
+#include "core/fxcrt/cfx_unowned_ptr.h"
+#include "core/fxcrt/fx_string.h"
+
+class CPDFSDK_Widget;
+class CPDF_Dictionary;
+class CPDF_Stream;
+
+class CPWL_AppStream {
+ public:
+ CPWL_AppStream(CPDFSDK_Widget* widget, CPDF_Dictionary* dict);
+ ~CPWL_AppStream();
+
+ void SetAsPushButton();
+ void SetAsCheckBox();
+ void SetAsRadioButton();
+ void SetAsComboBox(const CFX_WideString* sValue);
+ void SetAsListBox();
+ void SetAsTextField(const CFX_WideString* sValue);
+
+ private:
+ void AddImage(const CFX_ByteString& sAPType, CPDF_Stream* pImage);
+ void Write(const CFX_ByteString& sAPType,
+ const CFX_ByteString& sContents,
+ const CFX_ByteString& sAPState);
+ void Remove(const CFX_ByteString& sAPType);
+
+ CFX_ByteString GetBackgroundAppStream() const;
+ CFX_ByteString GetBorderAppStream() const;
+
+ CFX_UnownedPtr<CPDFSDK_Widget> widget_;
+ CFX_UnownedPtr<CPDF_Dictionary> dict_;
+};
+
+#endif // FPDFSDK_PWL_CPWL_APPSTREAM_H_