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// 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 _FDE_CSSSYNTAX
#define _FDE_CSSSYNTAX
class CFDE_CSSTextBuf : public CFX_Target
{
public:
CFDE_CSSTextBuf();
~CFDE_CSSTextBuf();
FX_BOOL AttachBuffer(const FX_WCHAR* pBuffer, int32_t iBufLen);
FX_BOOL EstimateSize(int32_t iAllocSize);
int32_t LoadFromStream(IFX_Stream *pTxtStream, int32_t iStreamOffset, int32_t iMaxChars, FX_BOOL &bEOS);
FX_BOOL AppendChar(FX_WCHAR wch)
{
if (m_iDatLen >= m_iBufLen && !ExpandBuf(m_iBufLen * 2)) {
return FALSE;
}
return (m_pBuffer[m_iDatLen++] = wch), TRUE;
}
void Clear()
{
m_iDatPos = m_iDatLen = 0;
}
void Reset();
int32_t TrimEnd()
{
while (m_iDatLen > 0 && m_pBuffer[m_iDatLen - 1] <= ' ') {
--m_iDatLen;
}
AppendChar(0);
return --m_iDatLen;
}
void Subtract(int32_t iStart, int32_t iLength);
FX_BOOL IsEOF() const
{
return m_iDatPos >= m_iDatLen;
}
FX_WCHAR GetAt(int32_t index) const
{
return m_pBuffer[index];
}
FX_WCHAR GetChar() const
{
return m_pBuffer[m_iDatPos];
}
FX_WCHAR GetNextChar() const
{
return (m_iDatPos + 1 >= m_iDatLen) ? 0 : m_pBuffer[m_iDatPos + 1];
}
void MoveNext()
{
m_iDatPos++;
}
int32_t GetLength() const
{
return m_iDatLen;
}
const FX_WCHAR* GetBuffer() const
{
return m_pBuffer;
}
protected:
FX_BOOL ExpandBuf(int32_t iDesiredSize);
FX_BOOL m_bExtBuf;
FX_WCHAR* m_pBuffer;
int32_t m_iBufLen;
int32_t m_iDatLen;
int32_t m_iDatPos;
};
#define FDE_CSSSYNTAXCHECK_AllowCharset 1
#define FDE_CSSSYNTAXCHECK_AllowImport 2
enum FDE_CSSSYNTAXMODE {
FDE_CSSSYNTAXMODE_RuleSet,
FDE_CSSSYNTAXMODE_Comment,
FDE_CSSSYNTAXMODE_AtRule,
FDE_CSSSYNTAXMODE_UnknownRule,
FDE_CSSSYNTAXMODE_Charset,
FDE_CSSSYNTAXMODE_Import,
FDE_CSSSYNTAXMODE_MediaRule,
FDE_CSSSYNTAXMODE_URI,
FDE_CSSSYNTAXMODE_MediaType,
FDE_CSSSYNTAXMODE_Selector,
FDE_CSSSYNTAXMODE_PropertyName,
FDE_CSSSYNTAXMODE_PropertyValue,
};
class CFDE_CSSSyntaxParser : public IFDE_CSSSyntaxParser, public CFX_Target
{
public:
CFDE_CSSSyntaxParser();
~CFDE_CSSSyntaxParser();
virtual void Release()
{
FDE_Delete this;
}
virtual FX_BOOL Init(IFX_Stream *pStream, int32_t iCSSPlaneSize, int32_t iTextDataSize = 32, FX_BOOL bOnlyDeclaration = FALSE);
virtual FX_BOOL Init(const FX_WCHAR* pBuffer, int32_t iBufferSize, int32_t iTextDatSize = 32, FX_BOOL bOnlyDeclaration = FALSE);
virtual FDE_CSSSYNTAXSTATUS DoSyntaxParse();
virtual const FX_WCHAR* GetCurrentString(int32_t &iLength) const;
protected:
void Reset(FX_BOOL bOnlyDeclaration);
void SwitchMode(FDE_CSSSYNTAXMODE eMode);
int32_t SwitchToComment();
FX_BOOL RestoreMode();
FX_BOOL AppendChar(FX_WCHAR wch);
int32_t SaveTextData();
FX_BOOL IsCharsetEnabled() const
{
return (m_dwCheck & FDE_CSSSYNTAXCHECK_AllowCharset) != 0;
}
void DisableCharset()
{
m_dwCheck = FDE_CSSSYNTAXCHECK_AllowImport;
}
FX_BOOL IsImportEnabled() const;
void DisableImport()
{
m_dwCheck = 0;
}
IFX_Stream *m_pStream;
int32_t m_iStreamPos;
int32_t m_iPlaneSize;
CFDE_CSSTextBuf m_TextData;
CFDE_CSSTextBuf m_TextPlane;
int32_t m_iTextDatLen;
FX_DWORD m_dwCheck;
FDE_CSSSYNTAXMODE m_eMode;
FDE_CSSSYNTAXSTATUS m_eStatus;
CFX_StackTemplate<FDE_CSSSYNTAXMODE> m_ModeStack;
};
#endif
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