| // 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 CORE_FXCRT_CFX_BLOCKBUFFER_H_ |
| #define CORE_FXCRT_CFX_BLOCKBUFFER_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <utility> |
| #include <vector> |
| |
| #include "core/fxcrt/fx_string.h" |
| |
| class CFX_BlockBuffer { |
| public: |
| CFX_BlockBuffer(); |
| ~CFX_BlockBuffer(); |
| |
| bool InitBuffer(); |
| bool IsInitialized() { return m_BufferSize / GetAllocStep() >= 1; } |
| |
| std::pair<wchar_t*, size_t> GetAvailableBlock(); |
| size_t GetAllocStep() const; |
| size_t GetDataLength() const { return m_DataLength; } |
| void IncrementDataLength() { m_DataLength++; } |
| bool IsEmpty() const { return m_DataLength == 0; } |
| |
| void Reset(bool bReserveData) { |
| if (!bReserveData) |
| m_StartPosition = 0; |
| m_DataLength = 0; |
| } |
| |
| void SetTextChar(size_t iIndex, wchar_t ch); |
| void DeleteTextChars(size_t iCount); |
| CFX_WideString GetTextData(size_t iStart, size_t iLength) const; |
| |
| private: |
| std::pair<size_t, size_t> TextDataIndex2BufIndex(const size_t iIndex) const; |
| |
| std::vector<std::unique_ptr<wchar_t, FxFreeDeleter>> m_BlockArray; |
| size_t m_DataLength; |
| size_t m_BufferSize; |
| size_t m_StartPosition; |
| }; |
| |
| #endif // CORE_FXCRT_CFX_BLOCKBUFFER_H_ |