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66 lines
1.9 KiB
66 lines
1.9 KiB
// Copyright 2017 PDFium Authors. All rights reserved. |
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// Use of this source code is governed by a BSD-style license that can be |
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// found in the LICENSE file. |
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
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#ifndef XFA_FDE_CSS_CFDE_CSSTEXTBUF_H_ |
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#define XFA_FDE_CSS_CFDE_CSSTEXTBUF_H_ |
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#include "core/fxcrt/cfx_retain_ptr.h" |
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#include "core/fxcrt/fx_memory.h" |
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#include "core/fxcrt/fx_system.h" |
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#include "xfa/fgas/crt/fgas_stream.h" |
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class CFDE_CSSTextBuf { |
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public: |
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CFDE_CSSTextBuf(); |
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~CFDE_CSSTextBuf(); |
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bool AttachBuffer(const FX_WCHAR* pBuffer, int32_t iBufLen); |
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bool EstimateSize(int32_t iAllocSize); |
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int32_t LoadFromStream(const CFX_RetainPtr<IFGAS_Stream>& pTxtStream, |
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int32_t iStreamOffset, |
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int32_t iMaxChars, |
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bool& bEOS); |
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bool AppendChar(FX_WCHAR wch) { |
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if (m_iDatLen >= m_iBufLen && !ExpandBuf(m_iBufLen * 2)) |
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return false; |
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m_pBuffer[m_iDatLen++] = wch; |
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return true; |
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} |
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void Clear() { m_iDatPos = m_iDatLen = 0; } |
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void Reset(); |
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int32_t TrimEnd() { |
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while (m_iDatLen > 0 && m_pBuffer[m_iDatLen - 1] <= ' ') |
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--m_iDatLen; |
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AppendChar(0); |
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return --m_iDatLen; |
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} |
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void Subtract(int32_t iStart, int32_t iLength); |
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bool IsEOF() const { return m_iDatPos >= m_iDatLen; } |
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FX_WCHAR GetAt(int32_t index) const { return m_pBuffer[index]; } |
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FX_WCHAR GetChar() const { return m_pBuffer[m_iDatPos]; } |
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FX_WCHAR GetNextChar() const { |
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return (m_iDatPos + 1 >= m_iDatLen) ? 0 : m_pBuffer[m_iDatPos + 1]; |
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} |
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void MoveNext() { m_iDatPos++; } |
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int32_t GetLength() const { return m_iDatLen; } |
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const FX_WCHAR* GetBuffer() const { return m_pBuffer; } |
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protected: |
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bool ExpandBuf(int32_t iDesiredSize); |
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bool m_bExtBuf; |
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FX_WCHAR* m_pBuffer; |
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int32_t m_iBufLen; |
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int32_t m_iDatLen; |
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int32_t m_iDatPos; |
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}; |
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#endif // XFA_FDE_CSS_CFDE_CSSTEXTBUF_H_
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