1 files changed, 65 insertions, 0 deletions
diff --git a/xfa/fde/cfde_txtedtbuf.h b/xfa/fde/cfde_txtedtbuf.h
new file mode 100644
index 0000000000..0007fa4acd
--- /dev/null
+++ b/xfa/fde/cfde_txtedtbuf.h
@@ -0,0 +1,65 @@
+// 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_FDE_CFDE_TXTEDTBUF_H_
+#define XFA_FDE_CFDE_TXTEDTBUF_H_
+
+#include "core/fxcrt/include/fx_basic.h"
+#include "core/fxcrt/include/fx_system.h"
+
+class IFX_MemoryAllocator;
+class IFX_Pause;
+
+class CFDE_TxtEdtBuf {
+ public:
+  CFDE_TxtEdtBuf();
+
+  void Release();
+  FX_BOOL SetChunkSize(int32_t nChunkSize);
+  int32_t GetChunkSize() const;
+  int32_t GetTextLength() const;
+  void SetText(const CFX_WideString& wsText);
+  void GetText(CFX_WideString& wsText) const;
+  FX_WCHAR GetCharByIndex(int32_t nIndex) const;
+  void GetRange(CFX_WideString& wsText,
+                int32_t nBegin,
+                int32_t nCount = -1) const;
+
+  void Insert(int32_t nPos, const FX_WCHAR* lpText, int32_t nLength = 1);
+  void Delete(int32_t nIndex, int32_t nLength = 1);
+  void Clear(FX_BOOL bRelease = TRUE);
+
+  FX_BOOL Optimize(IFX_Pause* pPause = nullptr);
+
+ protected:
+  ~CFDE_TxtEdtBuf();
+
+ private:
+  friend class CFDE_TxtEdtBufIter;
+
+  struct FDE_CHUNKHEADER {
+    int32_t nUsed;
+    FX_WCHAR wChars[1];
+  };
+
+  struct FDE_CHUNKPLACE {
+    int32_t nChunkIndex;
+    int32_t nCharIndex;
+  };
+
+  void ResetChunkBuffer(int32_t nDefChunkCount, int32_t nChunkSize);
+  int32_t CP2Index(const FDE_CHUNKPLACE& cp) const;
+  void Index2CP(int32_t nIndex, FDE_CHUNKPLACE& cp) const;
+
+  int32_t m_nChunkSize;
+
+  int32_t m_nTotal;
+  FX_BOOL m_bChanged;
+  CFX_ArrayTemplate<FDE_CHUNKHEADER*> m_Chunks;
+  IFX_MemoryAllocator* m_pAllocator;
+};
+
+#endif  // XFA_FDE_CFDE_TXTEDTBUF_H_