// Copyright 2014 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_FDE_CSSSYNTAX_H_
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#define XFA_FDE_CSS_FDE_CSSSYNTAX_H_
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#include "xfa/fde/css/fde_css.h"
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#include "xfa/fgas/crt/fgas_memory.h"
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#include "xfa/fgas/crt/fgas_stream.h"
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class CFDE_CSSTextBuf : public CFX_Target {
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public:
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CFDE_CSSTextBuf();
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~CFDE_CSSTextBuf() override;
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FX_BOOL AttachBuffer(const FX_WCHAR* pBuffer, int32_t iBufLen);
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FX_BOOL EstimateSize(int32_t iAllocSize);
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int32_t LoadFromStream(IFX_Stream* pTxtStream,
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int32_t iStreamOffset,
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int32_t iMaxChars,
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FX_BOOL& bEOS);
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FX_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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}
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return (m_pBuffer[m_iDatLen++] = wch), 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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}
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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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FX_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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FX_BOOL ExpandBuf(int32_t iDesiredSize);
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FX_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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#define FDE_CSSSYNTAXCHECK_AllowCharset 1
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#define FDE_CSSSYNTAXCHECK_AllowImport 2
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enum FDE_CSSSYNTAXMODE {
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FDE_CSSSYNTAXMODE_RuleSet,
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FDE_CSSSYNTAXMODE_Comment,
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FDE_CSSSYNTAXMODE_AtRule,
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FDE_CSSSYNTAXMODE_UnknownRule,
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FDE_CSSSYNTAXMODE_Charset,
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FDE_CSSSYNTAXMODE_Import,
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FDE_CSSSYNTAXMODE_MediaRule,
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FDE_CSSSYNTAXMODE_URI,
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FDE_CSSSYNTAXMODE_MediaType,
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FDE_CSSSYNTAXMODE_Selector,
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FDE_CSSSYNTAXMODE_PropertyName,
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FDE_CSSSYNTAXMODE_PropertyValue,
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};
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class CFDE_CSSSyntaxParser : public CFX_Target {
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public:
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CFDE_CSSSyntaxParser();
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~CFDE_CSSSyntaxParser() override;
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FX_BOOL Init(IFX_Stream* pStream,
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int32_t iCSSPlaneSize,
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int32_t iTextDataSize = 32,
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FX_BOOL bOnlyDeclaration = FALSE);
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FX_BOOL Init(const FX_WCHAR* pBuffer,
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int32_t iBufferSize,
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int32_t iTextDatSize = 32,
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FX_BOOL bOnlyDeclaration = FALSE);
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FDE_CSSSYNTAXSTATUS DoSyntaxParse();
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const FX_WCHAR* GetCurrentString(int32_t& iLength) const;
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protected:
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void Reset(FX_BOOL bOnlyDeclaration);
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void SwitchMode(FDE_CSSSYNTAXMODE eMode);
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int32_t SwitchToComment();
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FX_BOOL RestoreMode();
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FX_BOOL AppendChar(FX_WCHAR wch);
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int32_t SaveTextData();
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FX_BOOL IsCharsetEnabled() const {
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return (m_dwCheck & FDE_CSSSYNTAXCHECK_AllowCharset) != 0;
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}
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void DisableCharset() { m_dwCheck = FDE_CSSSYNTAXCHECK_AllowImport; }
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FX_BOOL IsImportEnabled() const;
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void DisableImport() { m_dwCheck = 0; }
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IFX_Stream* m_pStream;
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int32_t m_iStreamPos;
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int32_t m_iPlaneSize;
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CFDE_CSSTextBuf m_TextData;
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CFDE_CSSTextBuf m_TextPlane;
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int32_t m_iTextDatLen;
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uint32_t m_dwCheck;
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FDE_CSSSYNTAXMODE m_eMode;
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FDE_CSSSYNTAXSTATUS m_eStatus;
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CFX_StackTemplate<FDE_CSSSYNTAXMODE> m_ModeStack;
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};
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#endif // XFA_FDE_CSS_FDE_CSSSYNTAX_H_
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