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git-svn-id: svn://fileserver/activex/AVS/Sources/TeamlabOffice/trunk/ServerComponents@52221 954022d7-b5bf-4e40-9824-e11837661b57
This commit is contained in:
Sergey.Kirillov
committed by
Alexander Trofimov
Alexander Trofimov
parent
7299b44189
commit
3779f31d9e
312
ASCOfficeHtmlFile/SDK/HTMLReader/LiteHTMLReader.cpp
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312
ASCOfficeHtmlFile/SDK/HTMLReader/LiteHTMLReader.cpp
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/**
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* PROJECT - HTML Reader Class Library
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*
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* LiteHTMLReader.cpp - CLiteHTMLReader implementation
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*
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* Written By Gurmeet S. Kochar <gomzygotit@hotmail.com>
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* Copyright (c) 2004. All rights reserved.
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*
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* This code may be used in compiled form in any way you desire
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* (including commercial use). The code may be redistributed
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* unmodified by any means PROVIDING it is not sold for profit
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* without the authors written consent, and providing that this
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* notice and the authors name and all copyright notices remains
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* intact. However, this file and the accompanying source code may
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* not be hosted on a website or bulletin board without the authors
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* written permission.
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*
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* This file is provided "AS IS" with no expressed or implied warranty.
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* The author accepts no liability for any damage/loss of business that
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* this product may cause.
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*
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* Although it is not necessary, but if you use this code in any of
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* your application (commercial or non-commercial), please INFORM me
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* so that I may know how useful this library is. This will encourage
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* me to keep updating it.
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*/
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#include "stdafx.h"
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#include "LiteHTMLReader.h"
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#ifdef _DEBUG
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# define new DEBUG_NEW
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# undef THIS_FILE
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static char THIS_FILE[] = __FILE__;
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#endif // _DEBUG
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#ifndef __LITEHTMLENTITYRESOLVER_H__
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# include "LiteHTMLEntityResolver.h"
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#endif // !__LITEHTMLENTITYRESOLVER_H__
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#pragma warning(push, 4)
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UINT CLiteHTMLReader::parseDocument(void)
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{
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ASSERT(m_lpszBuffer != NULL);
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bool bAbort = false; // continue parsing or abort?
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bool bIsClosingTag = false; // tag parsed is a closing tag?
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bool bIsOpeningTag = false; // tag parsed is an opening tag?
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CString strCharacters; // character data
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CString strComment; // comment data
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CString strT; // temporary storage
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DWORD dwCharDataStart = 0L; // starting position of character data
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DWORD dwCharDataLen = 0L; // length of character data
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LONG lTemp = 0L; // temporary storage
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TCHAR ch = 0; // character at current buffer position
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CLiteHTMLTag oTag; // tag information
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if ( (!m_lpszBuffer) || (!m_dwBufLen) )
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return (0U);
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// reset seek pointer to beginning
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ResetSeekPointer();
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// notify event handler about parsing startup
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if (getEventNotify(notifyStartStop))
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{
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bAbort = false;
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m_pEventHandler->BeginParse(m_dwAppData, bAbort);
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if (bAbort) goto LEndParse;
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}
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// skip leading white-space characters
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while (isWhiteSpace(ReadChar()))
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;
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ch = UngetChar();
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while ((ch = ReadChar()) != NULL)
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{
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switch (ch)
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{
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// tag starting delimeter?
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case _T('<'):
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{
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UngetChar();
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strComment.Empty();
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if (!parseComment(strComment))
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{
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bIsOpeningTag = false;
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bIsClosingTag = false;
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if (!parseTag(oTag, bIsOpeningTag, bIsClosingTag))
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{
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++dwCharDataLen;
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// manually advance buffer position
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// because the last call to UngetChar()
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// moved it back one character
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ch = ReadChar();
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break;
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}
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}
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// clear pending notifications
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if ( (dwCharDataLen) || (strCharacters.GetLength()) )
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{
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strCharacters += CString(&m_lpszBuffer[dwCharDataStart], dwCharDataLen);
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NormalizeCharacters(strCharacters);
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if ( (strCharacters.GetLength()) &&
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(getEventNotify(notifyCharacters)) )
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{
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bAbort = false;
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m_pEventHandler->Characters(strCharacters, m_dwAppData, bAbort);
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if (bAbort) goto LEndParse;
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}
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strCharacters.Empty();
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}
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dwCharDataLen = 0L;
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dwCharDataStart = m_dwBufPos;
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if (strComment.GetLength())
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{
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if (getEventNotify(notifyComment))
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{
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bAbort = false;
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m_pEventHandler->Comment(strComment, m_dwAppData, bAbort);
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if (bAbort) goto LEndParse;
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}
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}
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else
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{
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if ( (bIsOpeningTag) && (getEventNotify(notifyTagStart)) )
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{
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bAbort = false;
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m_pEventHandler->StartTag(&oTag, m_dwAppData, bAbort);
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if (bAbort) goto LEndParse;
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}
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if ( (bIsClosingTag) && (getEventNotify(notifyTagEnd)) )
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{
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bAbort = false;
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m_pEventHandler->EndTag(&oTag, m_dwAppData, bAbort);
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if (bAbort) goto LEndParse;
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}
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}
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break;
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}
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// entity reference beginning delimeter?
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case _T('&'):
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{
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UngetChar();
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lTemp = 0;
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if (m_bResolveEntities)
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lTemp = CLiteHTMLEntityResolver::resolveEntity(&m_lpszBuffer[m_dwBufPos], ch);
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if (lTemp)
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{
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strCharacters += CString(&m_lpszBuffer[dwCharDataStart], dwCharDataLen) + ch;
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m_dwBufPos += lTemp;
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dwCharDataStart = m_dwBufPos;
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dwCharDataLen = 0L;
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}
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else
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{
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ch = ReadChar();
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++dwCharDataLen;
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}
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break;
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}
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// any other character
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default:
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{
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++dwCharDataLen;
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break;
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}
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}
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}
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// clear pending notifications
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if ( (dwCharDataLen) || (strCharacters.GetLength()) )
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{
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strCharacters += CString(&m_lpszBuffer[dwCharDataStart], dwCharDataLen) + ch;
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NormalizeCharacters(strCharacters);
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strCharacters.TrimRight(); // explicit trailing white-space removal
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if ( (strCharacters.GetLength()) &&
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(getEventNotify(notifyCharacters)) )
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{
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bAbort = false;
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m_pEventHandler->Characters(strCharacters, m_dwAppData, bAbort);
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if (bAbort) goto LEndParse;
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}
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}
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LEndParse:
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// notify event handler about parsing completion
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if (getEventNotify(notifyStartStop))
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m_pEventHandler->EndParse(m_dwAppData, bAbort);
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m_lpszBuffer = NULL;
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m_dwBufLen = 0L;
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return (m_dwBufPos);
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}
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/**
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* CLiteHTMLReader::Read
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* The Read method parses an HTML document from an
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* in-memory string buffer and raises events defined
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* in ILiteHTMLReaderEvents to notify about variours
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* elements.
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*
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* @param lpszString - string containing HTML text to parse
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*
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* @return number of TCHARs successfully parsed
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* @since 1.0
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* @author Gurmeet S. Kochar
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*/
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UINT CLiteHTMLReader::Read(LPCTSTR lpszString)
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{
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ASSERT(AfxIsValidString(lpszString));
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m_dwBufLen = ::_tcslen(lpszString);
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if (m_dwBufLen)
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{
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m_lpszBuffer = lpszString;
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return (parseDocument());
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}
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return (0U);
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}
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/**
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* CLiteHTMLReader::Read
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* This method is similar to the Read(LPCTSTR) method,
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* except that, it accepts a file HANDLE instead of
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* an in-memory string buffer containing HTML text.
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*
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* @param hFile - file handle
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*
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* @return number of TCHARs successfully parsed
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* @since 1.0
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* @author Gurmeet S. Kochar
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*/
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UINT CLiteHTMLReader::ReadFile(HANDLE hFile)
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{
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ASSERT(hFile != INVALID_HANDLE_VALUE);
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ASSERT(::GetFileType(hFile) == FILE_TYPE_DISK);
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HANDLE hFileMap;
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LPCTSTR lpsz;
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UINT nRetVal;
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// determine file size
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m_dwBufLen = ::GetFileSize(hFile, NULL);
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if (m_dwBufLen == INVALID_FILE_SIZE)
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{
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TRACE1("(Error) CLiteHTMLReader::Read:"
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" GetFileSize() failed;"
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" GetLastError() returns 0x%08x.\n", ::GetLastError());
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goto LError;
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}
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// calculate length, in TCHARs, of the buffer
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m_dwBufLen /= sizeof(TCHAR);
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if (!m_dwBufLen)
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return (0U);
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// create a file-mapping object for the file
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hFileMap = ::CreateFileMapping(hFile, NULL, PAGE_READONLY, 0L, 0L, NULL);
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if (hFileMap == NULL)
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{
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TRACE1("(Error) CLiteHTMLReader::Read:"
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" CreateFileMapping() failed;"
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" GetLastError() returns 0x%08x.\n", ::GetLastError());
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goto LError;
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}
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// map the entire file into the address-space of the application
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lpsz = (LPCTSTR)::MapViewOfFile(hFileMap, FILE_MAP_READ, 0L, 0L, 0L);
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if (lpsz == NULL)
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{
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TRACE1("(Error) CLiteHTMLReader::Read:"
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" MapViewOfFile() failed;"
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" GetLastError() returns 0x%08x.\n", ::GetLastError());
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goto LError;
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}
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m_lpszBuffer = lpsz;
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nRetVal = parseDocument();
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goto LCleanExit;
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LError:
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nRetVal = 0U;
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m_dwBufLen = 0L;
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LCleanExit:
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if (lpsz != NULL)
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VERIFY(::UnmapViewOfFile(lpsz));
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if (hFileMap)
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VERIFY(::CloseHandle(hFileMap));
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return (nRetVal);
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}
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#pragma warning(pop)
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