///////////////////////////////////////////////////////////////////////////
//  File:    xml.cpp
//  Version: 1.1.0.4
//  Updated: 19-Jul-1998
//
//  Copyright:  Ferdinand Prantl, portions by Stcherbatchenko Andrei
//  E-mail:     prantl@ff.cuni.cz
//
//  XML syntax highlighing definition
//
//  You are free to use or modify this code to the following restrictions:
//  - Acknowledge me somewhere in your about box, simple "Parts of code by.."
//  will be enough. If you can't (or don't want to), contact me personally.
//  - LEAVE THIS HEADER INTACT
////////////////////////////////////////////////////////////////////////////

#include "StdAfx.h"
#include "crystallineparser.h"
#include "../SyntaxColors.h"
#include "../utils/string_util.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

//  C++ keywords (MSVC5.0 + POET5.0)
static const TCHAR * s_apszXmlKeywordList[] =
  {
    _T ("ATTLIST"),
    _T ("DOCTYPE"),
    _T ("ELEMENT"),
    _T ("ENTITY"),
    _T ("NOTATION"),
    _T ("xml"),
  };

static const TCHAR * s_apszUser1KeywordList[] =
  {
    _T ("#FIXED"),
    _T ("#IMPLIED"),
    _T ("#REQUIRED"),
    _T ("ANY"),
    _T ("CDATA"),
    _T ("EMPTY"),
    _T ("ENTITIES"),
    _T ("ENTITY"),
    _T ("ID"),
    _T ("IDREF"),
    _T ("IDREFS"),
    _T ("IGNORE"),
    _T ("INCLUDE"),
    _T ("NDATA"),
    _T ("NMTOKEN"),
    _T ("NMTOKENS"),
    _T ("PCDATA"),
    _T ("PUBLIC"),
    _T ("SYSTEM"),
    _T ("encoding"),
    _T ("standalone"),
    _T ("version"),
  };

static bool
IsXmlKeyword (const TCHAR *pszChars, int nLength)
{
  return ISXKEYWORDI (s_apszXmlKeywordList, pszChars, nLength);
}

static bool
IsUser1Keyword (const TCHAR *pszChars, int nLength)
{
  return ISXKEYWORDI (s_apszUser1KeywordList, pszChars, nLength);
}

unsigned
CrystalLineParser::ParseLineXml (unsigned dwCookie, const TCHAR *pszChars, int nLength, TEXTBLOCK * pBuf, int &nActualItems)
{
  if (nLength == 0)
    return dwCookie & COOKIE_EXT_COMMENT;

  bool bRedefineBlock = true;
  bool bDecIndex = false;
  int nIdentBegin = -1;
  int nPrevI = -1;
  int I=0;
  for (I = 0;; nPrevI = I, I = static_cast<int>(::CharNext(pszChars+I) - pszChars))
    {
      if (I == nPrevI)
        {
          // CharNext did not advance, so we're at the end of the string
          // and we already handled this character, so stop
          break;
        }

      if (bRedefineBlock)
        {
          int nPos = I;
          if (bDecIndex)
            nPos = nPrevI;
          if (dwCookie & (COOKIE_COMMENT | COOKIE_EXT_COMMENT))
            {
              DEFINE_BLOCK (nPos, COLORINDEX_COMMENT);
            }
          else if (dwCookie & (COOKIE_CHAR | COOKIE_STRING))
            {
              DEFINE_BLOCK (nPos, COLORINDEX_STRING);
            }
          else if (dwCookie & COOKIE_PREPROCESSOR)
            {
              DEFINE_BLOCK (nPos, COLORINDEX_PREPROCESSOR);
            }
          else
            {
              if (xisalnum (pszChars[nPos]) || pszChars[nPos] == '.')
                {
                  DEFINE_BLOCK (nPos, COLORINDEX_NORMALTEXT);
                }
              else
                {
                  DEFINE_BLOCK (nPos, COLORINDEX_OPERATOR);
                  bRedefineBlock = true;
                  bDecIndex = true;
                  goto out;
                }
            }
          bRedefineBlock = false;
          bDecIndex = false;
        }
out:

      // Can be bigger than length if there is binary data
      // See bug #1474782 Crash when comparing SQL with with binary data
      if (I >= nLength || pszChars[I] == 0)
        break;

      if (dwCookie & COOKIE_COMMENT)
        {
          DEFINE_BLOCK (I, COLORINDEX_COMMENT);
          dwCookie |= COOKIE_COMMENT;
          break;
        }

      //  String constant "...."
      if (dwCookie & COOKIE_STRING)
        {
          if (pszChars[I] == '"')
            {
              dwCookie &= ~COOKIE_STRING;
              bRedefineBlock = true;
            }
          continue;
        }

      //  Char constant '..'
      if (dwCookie & COOKIE_CHAR)
        {
          if (pszChars[I] == '\'')
            {
              dwCookie &= ~COOKIE_CHAR;
              bRedefineBlock = true;
            }
          continue;
        }

      //  Extended comment <!--....-->
      if (dwCookie & COOKIE_EXT_COMMENT)
        {
          if (I > 1 && pszChars[I] == '>' && pszChars[nPrevI] == '-' && *::CharPrev(pszChars, pszChars + nPrevI) == '-')
            {
              dwCookie &= ~COOKIE_EXT_COMMENT;
              bRedefineBlock = true;
            }
          continue;
        }

      //  Extended comment <?....?>
      if (dwCookie & COOKIE_EXT_USER1)
        {
          if (I > 0 && pszChars[I] == '>' && pszChars[nPrevI] == '?')
            {
              dwCookie &= ~COOKIE_EXT_USER1;
              bRedefineBlock = true;
            }
          continue;
        }

      //  Normal text
      if (pszChars[I] == '"')
        {
          DEFINE_BLOCK (I, COLORINDEX_STRING);
          dwCookie |= COOKIE_STRING;
          continue;
        }
      if (pszChars[I] == '\'')
        {
          // if (I + 1 < nLength && pszChars[I + 1] == '\'' || I + 2 < nLength && pszChars[I + 1] != '\\' && pszChars[I + 2] == '\'' || I + 3 < nLength && pszChars[I + 1] == '\\' && pszChars[I + 3] == '\'')
          if (!I || !xisalnum (pszChars[nPrevI]))
            {
              DEFINE_BLOCK (I, COLORINDEX_STRING);
              dwCookie |= COOKIE_CHAR;
              continue;
            }
        }
      if (!(dwCookie & COOKIE_EXT_USER1) && I < nLength - 3 && pszChars[I] == '<' && pszChars[I + 1] == '!' && pszChars[I + 2] == '-' && pszChars[I + 3] == '-')
        {
          DEFINE_BLOCK (I, COLORINDEX_COMMENT);
          I += 3;
          dwCookie |= COOKIE_EXT_COMMENT;
          dwCookie &= ~COOKIE_PREPROCESSOR;
          continue;
        }

      if (pBuf == nullptr)
        continue;               //  We don't need to extract keywords,
      //  for faster parsing skip the rest of loop

      if (xisalnum (pszChars[I]) || pszChars[I] == '.')
        {
          if (nIdentBegin == -1)
            nIdentBegin = I;
        }
      else
        {
          if (nIdentBegin >= 0)
            {
              if (dwCookie & COOKIE_PREPROCESSOR)
                {
                  if (IsXmlKeyword (pszChars + nIdentBegin, I - nIdentBegin))
                    {
                      DEFINE_BLOCK (nIdentBegin, COLORINDEX_KEYWORD);
                    }
                  else if (IsUser1Keyword (pszChars + nIdentBegin, I - nIdentBegin))
                    {
                      DEFINE_BLOCK (nIdentBegin, COLORINDEX_USER1);
                    }
                  else if (IsXNumber (pszChars + nIdentBegin, I - nIdentBegin))
                    {
                      DEFINE_BLOCK (nIdentBegin, COLORINDEX_NUMBER);
                    }
                  else
                    {
                      goto next;
                    }
                }
              else if (dwCookie & COOKIE_USER1)
                {
                  if (IsHtmlUser2Keyword (pszChars + nIdentBegin, I - nIdentBegin))
                    {
                      DEFINE_BLOCK (nIdentBegin, COLORINDEX_USER2);
                    }
                  else
                    {
                      goto next;
                    }
                }
              else if (IsXNumber (pszChars + nIdentBegin, I - nIdentBegin))
                {
                  DEFINE_BLOCK (nIdentBegin, COLORINDEX_NUMBER);
                }
              else
                {
                  goto next;
                }
              bRedefineBlock = true;
              bDecIndex = true;
              nIdentBegin = -1;
next:
              ;
            }
          //  Preprocessor start: < or bracket
          if (!(dwCookie & COOKIE_EXT_USER1) && pszChars[I] == '<' && !(I < nLength - 3 && pszChars[I + 1] == '!' && pszChars[I + 2] == '-' && pszChars[I + 3] == '-') || pszChars[I] == '{')
            {
              DEFINE_BLOCK (I, COLORINDEX_PREPROCESSOR);
              dwCookie |= COOKIE_PREPROCESSOR;
              nIdentBegin = -1;
              continue;
            }

          //  Preprocessor end: > or bracket
          if (dwCookie & COOKIE_PREPROCESSOR)
            {
              if (pszChars[I] == '>' || pszChars[I] == '}')
                {
                  dwCookie &= ~COOKIE_PREPROCESSOR;
                  nIdentBegin = -1;
                  bRedefineBlock = true;
                  continue;
                }
            }
          //  Preprocessor start: &
          if (pszChars[I] == '&')
            {
              dwCookie |= COOKIE_USER1;
              nIdentBegin = -1;
              continue;
            }

          //  Preprocessor end: ;
          if (dwCookie & COOKIE_USER1)
            {
              if (pszChars[I] == ';')
                {
                  dwCookie &= ~COOKIE_USER1;
                  nIdentBegin = -1;
                  continue;
                }
            }
        }
    }

  if (nIdentBegin >= 0 && (dwCookie & COOKIE_PREPROCESSOR))
    {
      if (IsXmlKeyword (pszChars + nIdentBegin, I - nIdentBegin))
        {
          DEFINE_BLOCK (nIdentBegin, COLORINDEX_KEYWORD);
        }
      else if (IsUser1Keyword (pszChars + nIdentBegin, I - nIdentBegin))
        {
          DEFINE_BLOCK (nIdentBegin, COLORINDEX_USER1);
        }
      else if (IsHtmlUser2Keyword (pszChars + nIdentBegin, I - nIdentBegin))
        {
          DEFINE_BLOCK (nIdentBegin, COLORINDEX_USER2);
        }
      else if (IsXNumber (pszChars + nIdentBegin, I - nIdentBegin))
        {
          DEFINE_BLOCK (nIdentBegin, COLORINDEX_NUMBER);
        }
    }
  //  Preprocessor start: < or {
  if (!(dwCookie & COOKIE_EXT_USER1) && pszChars[I] == '<' && !(I < nLength - 3 && pszChars[I + 1] == '!' && pszChars[I + 2] == '-' && pszChars[I + 3] == '-') || pszChars[I] == '{')
    {
      DEFINE_BLOCK (I + 1, COLORINDEX_PREPROCESSOR);
      dwCookie |= COOKIE_PREPROCESSOR;
      nIdentBegin = -1;
      goto end;
    }

  //  Preprocessor end: > or }
  if (dwCookie & COOKIE_PREPROCESSOR)
    {
      if (pszChars[I] == '>' || pszChars[I] == '}')
        {
          dwCookie &= ~COOKIE_PREPROCESSOR;
          nIdentBegin = -1;
        }
    }
end:
  dwCookie &= (COOKIE_EXT_COMMENT | COOKIE_STRING | COOKIE_PREPROCESSOR | COOKIE_EXT_USER1);
  return dwCookie;
}
