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// 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_CSSSYNTAXPARSER_H_
#define XFA_FDE_CSS_CFDE_CSSSYNTAXPARSER_H_
#include <stack>
#include "xfa/fde/css/cfde_csstextbuf.h"
#define FDE_CSSSYNTAXCHECK_AllowCharset 1
#define FDE_CSSSYNTAXCHECK_AllowImport 2
enum class FDE_CSSSyntaxMode {
RuleSet,
Comment,
AtRule,
UnknownRule,
Charset,
Import,
MediaRule,
URI,
MediaType,
Selector,
PropertyName,
PropertyValue,
};
enum class FDE_CSSSyntaxStatus : uint8_t {
Error,
EOS,
None,
Charset,
ImportRule,
ImportClose,
PageRule,
StyleRule,
FontFaceRule,
MediaRule,
MediaType,
URI,
Selector,
DeclOpen,
DeclClose,
PropertyName,
PropertyValue,
};
class CFDE_CSSSyntaxParser {
public:
CFDE_CSSSyntaxParser();
~CFDE_CSSSyntaxParser();
bool Init(const FX_WCHAR* pBuffer,
int32_t iBufferSize,
int32_t iTextDatSize = 32,
bool bOnlyDeclaration = false);
FDE_CSSSyntaxStatus DoSyntaxParse();
const FX_WCHAR* GetCurrentString(int32_t& iLength) const;
protected:
void Reset(bool bOnlyDeclaration);
void SwitchMode(FDE_CSSSyntaxMode eMode);
int32_t SwitchToComment();
bool RestoreMode();
bool AppendChar(FX_WCHAR wch);
int32_t SaveTextData();
bool IsCharsetEnabled() const {
return (m_dwCheck & FDE_CSSSYNTAXCHECK_AllowCharset) != 0;
}
void DisableCharset() { m_dwCheck = FDE_CSSSYNTAXCHECK_AllowImport; }
bool IsImportEnabled() const;
void DisableImport() { m_dwCheck = 0; }
CFDE_CSSTextBuf m_TextData;
CFDE_CSSTextBuf m_TextPlane;
int32_t m_iTextDatLen;
uint32_t m_dwCheck;
FDE_CSSSyntaxMode m_eMode;
FDE_CSSSyntaxStatus m_eStatus;
std::stack<FDE_CSSSyntaxMode> m_ModeStack;
};
#endif // XFA_FDE_CSS_CFDE_CSSSYNTAXPARSER_H_
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