| // 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 XFA_FDE_CSS_CFDE_CSSTEXTBUF_H_ |
| #define XFA_FDE_CSS_CFDE_CSSTEXTBUF_H_ |
| |
| #include "core/fxcrt/cfx_retain_ptr.h" |
| #include "core/fxcrt/cfx_seekablestreamproxy.h" |
| #include "core/fxcrt/fx_memory.h" |
| #include "core/fxcrt/fx_system.h" |
| |
| class CFDE_CSSTextBuf { |
| public: |
| CFDE_CSSTextBuf(); |
| ~CFDE_CSSTextBuf(); |
| |
| void AttachBuffer(const wchar_t* pBuffer, int32_t iBufLen); |
| bool EstimateSize(int32_t iAllocSize); |
| bool AppendChar(wchar_t wch); |
| |
| void Clear() { m_iDatPos = m_iDatLen = 0; } |
| void Reset(); |
| |
| int32_t TrimEnd(); |
| |
| void Subtract(int32_t iStart, int32_t iLength); |
| bool IsEOF() const { return m_iDatPos >= m_iDatLen; } |
| |
| wchar_t GetAt(int32_t index) const { return GetBuffer()[index]; } |
| wchar_t GetChar() const { return GetBuffer()[m_iDatPos]; } |
| wchar_t GetNextChar() const { |
| return (m_iDatPos + 1 >= m_iDatLen) ? 0 : GetBuffer()[m_iDatPos + 1]; |
| } |
| |
| void MoveNext() { m_iDatPos++; } |
| |
| int32_t GetLength() const { return m_iDatLen; } |
| const wchar_t* GetBuffer() const; |
| |
| protected: |
| bool ExpandBuf(int32_t iDesiredSize); |
| |
| bool m_bExtBuf; |
| const wchar_t* m_pExtBuffer; |
| wchar_t* m_pBuffer; |
| int32_t m_iBufLen; |
| int32_t m_iDatLen; |
| int32_t m_iDatPos; |
| }; |
| |
| #endif // XFA_FDE_CSS_CFDE_CSSTEXTBUF_H_ |