/*
 *
 *  (c) COPYRIGHT MIT and INRIA, 1996-2001
 *  Please first read the full copyright statement in file COPYRIGHT.
 *
 */
 
/*
 * Everything directly linked to the CSS syntax should now hopefully
 * be contained in this module.
 *
 * Author: I. Vatton
 *
 */

/* Included headerfiles */
#define THOT_EXPORT extern
#include "amaya.h"
#include "css.h"
#include "undo.h"
#include "registry.h"
#include "fetchHTMLname.h"
#include "GraphML.h"

typedef struct _BackgroundImageCallbackBlock
{
  Element                     el;
  PSchema                     tsch;
  union
  {
    PresentationContextBlock  specific;
    GenericContextBlock       generic;
  } context;
}
BackgroundImageCallbackBlock, *BackgroundImageCallbackPtr;

#include "AHTURLTools_f.h"
#include "HTMLpresentation_f.h"
#include "HTMLimage_f.h"
#include "UIcss_f.h"
#include "css_f.h"
#include "fetchHTMLname_f.h"
#include "html2thot_f.h"
#include "styleparser_f.h"

#define MAX_BUFFER_LENGTH 200
/*
 * A PropertyParser is a function used to parse  the
 * description substring associated to a given style attribute
 * e.g.: "red" for a color attribute or "12pt bold helvetica"
 * for a font attribute.
 */
typedef char *(*PropertyParser) (Element element,
				   PSchema tsch,
				   PresentationContext context,
				   char *cssRule,
				   CSSInfoPtr css,
				   ThotBool isHTML);

/* Description of the set of CSS properties supported */
typedef struct CSSProperty
  {
     char                *name;
     PropertyParser       parsing_function;
  }
CSSProperty;

struct unit_def
{
   char               *sign;
   unsigned int        unit;
};

static struct unit_def CSSUnitNames[] =
{
   {"pt", STYLE_UNIT_PT},
   {"pc", STYLE_UNIT_PC},
   {"in", STYLE_UNIT_IN},
   {"cm", STYLE_UNIT_CM},
   {"mm", STYLE_UNIT_MM},
   {"em", STYLE_UNIT_EM},
   {"px", STYLE_UNIT_PX},
   {"ex", STYLE_UNIT_XHEIGHT},
   {"%", STYLE_UNIT_PERCENT}
};

#define NB_UNITS (sizeof(CSSUnitNames) / sizeof(struct unit_def))

/*----------------------------------------------------------------------
   SkipWord:                                                  
  ----------------------------------------------------------------------*/
static char *SkipWord (char *ptr)
{
# ifdef _WINDOWS
  /* iswalnum is supposed to be supported by the i18n veriosn of libc 
     use it when available */
  while (iswalnum (*ptr) || *ptr == '-' || *ptr == '%')
# else  /* !_WINDOWS */
  while (isalnum((int)*ptr) || *ptr == '-' || *ptr == '%')
# endif /* !_WINDOWS */
        ptr++;
  return (ptr);
}

/*----------------------------------------------------------------------
   SkipBlanksAndComments:                                                  
  ----------------------------------------------------------------------*/
char *SkipBlanksAndComments (char *ptr)
{
  ptr = TtaSkipBlanks (ptr);
  while (ptr[0] == '/' && ptr[1] == '*')
    {
      /* look for the end of the comment */
      ptr = &ptr[2];
      while (ptr[0] != EOS && (ptr[0] != '*' || ptr[1] != '/'))
	ptr++;
      if (ptr[0] != EOS)
	ptr = &ptr[2];
      ptr = TtaSkipBlanks (ptr);
    }
  return (ptr);
}


/*----------------------------------------------------------------------
   SkipQuotedString:                                                  
  ----------------------------------------------------------------------*/
static char *SkipQuotedString (char *ptr, char quote)
{
  ThotBool	stop;

  stop = FALSE;
  while (!stop)
    {
    if (*ptr == quote)
       {
       ptr++;
       stop = TRUE;
       }
    else if (*ptr == EOS)
       stop = TRUE;
    else if (*ptr == '\\')
       /* escape character */
       {
       ptr++;
       if ((*ptr >= '0' && *ptr <= '9') || (*ptr >= 'A' && *ptr <= 'F') ||
	   (*ptr >= 'a' && *ptr <= 'f'))
	  {
	  ptr++;
          if ((*ptr >= '0' && *ptr <= '9') || (*ptr >= 'A' && *ptr <= 'F') ||
	      (*ptr >= 'a' && *ptr <= 'f'))
	     ptr++;
	  }
       else
	  ptr++;
       }
    else
       ptr++;
    }
  return (ptr);
}

/*----------------------------------------------------------------------
   SkipProperty:                                                  
  ----------------------------------------------------------------------*/
char *SkipProperty (char *ptr)
{
  while (*ptr != EOS && *ptr != ';' && *ptr != '}')
    ptr++;
  return (ptr);
}

/*----------------------------------------------------------------------
   ParseNumber:                                                  
   parse a number and returns the corresponding value.
  ----------------------------------------------------------------------*/
char *ParseNumber (char *cssRule, PresentationValue *pval)
{
  int                 val = 0;
  int                 minus = 0;
  int                 valid = 0;
  int                 f = 0;
  ThotBool            real = FALSE;

  pval->typed_data.unit = STYLE_UNIT_REL;
  pval->typed_data.real = FALSE;
  cssRule = SkipBlanksAndComments (cssRule);
  if (*cssRule == '-')
    {
      minus = 1;
      cssRule++;
      cssRule = SkipBlanksAndComments (cssRule);
    }

  if (*cssRule == '+')
    {
      cssRule++;
      cssRule = SkipBlanksAndComments (cssRule);
    }

  while ((*cssRule >= '0') && (*cssRule <= '9'))
    {
      val *= 10;
      val += *cssRule - '0';
      cssRule++;
      valid = 1;
    }

  if (*cssRule == '.')
    {
      real = TRUE;
      f = val;
      val = 0;
      cssRule++;
      /* keep only 3 digits */
      if (*cssRule >= '0' && *cssRule <= '9')
	{
	  val = (*cssRule - '0') * 100;
	  cssRule++;
	  if (*cssRule >= '0' && *cssRule <= '9')
	    {
	      val += (*cssRule - '0') * 10;
	      cssRule++;
	      if ((*cssRule >= '0') && (*cssRule <= '9'))
		{
		  val += *cssRule - '0';
		  cssRule++;
		}
	    }

	  while (*cssRule >= '0' && *cssRule <= '9')
	    cssRule++;
	  valid = 1;
	}
    }

  if (!valid)
    {
      pval->typed_data.unit = STYLE_UNIT_INVALID;
      pval->typed_data.value = 0;
    }
  else
    {
      pval->typed_data.real = real;
      if (real)
	{
	  if (minus)
	    pval->typed_data.value = -(f * 1000 + val);
	  else
	    pval->typed_data.value = f * 1000 + val;
	}
      else
	{
	  if (minus)
	    pval->typed_data.value = -val;
	  else
	    pval->typed_data.value = val;
	}
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSUnit:                                                  
   parse a CSS Unit substring and returns the corresponding      
   value and its unit.                                           
  ----------------------------------------------------------------------*/
char *ParseCSSUnit (char *cssRule, PresentationValue *pval)
{
  unsigned int        uni;

  pval->typed_data.unit = STYLE_UNIT_REL;
  cssRule = ParseNumber (cssRule, pval);
  if (pval->typed_data.unit == STYLE_UNIT_INVALID)
      cssRule = SkipWord (cssRule);
  else
    {
      cssRule = SkipBlanksAndComments (cssRule);
      for (uni = 0; uni < NB_UNITS; uni++)
	{
	  if (!strncasecmp (CSSUnitNames[uni].sign, cssRule,
			     strlen (CSSUnitNames[uni].sign)))
	    {
	      pval->typed_data.unit = CSSUnitNames[uni].unit;
	      return (cssRule + strlen (CSSUnitNames[uni].sign));
	    }
	}
      /* not in the list of predefined units */
      pval->typed_data.unit = STYLE_UNIT_PX;
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseBorderValue                                       
  ----------------------------------------------------------------------*/
static char *ParseBorderValue (char *cssRule, PresentationValue *border)
{
  /* first parse the attribute string */
   border->typed_data.value = 0;
   border->typed_data.unit = STYLE_UNIT_INVALID;
   border->typed_data.real = FALSE;
   if (!strncasecmp (cssRule, "thin", 4))
     {
       border->typed_data.unit = STYLE_UNIT_PX;
       border->typed_data.value = 1;
       cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "medium", 6))
     {
       border->typed_data.unit = STYLE_UNIT_PX;
       border->typed_data.value = 3;
       cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "thick", 5))
     {
       border->typed_data.unit = STYLE_UNIT_PX;
       border->typed_data.value = 5;
       cssRule = SkipWord (cssRule);
     }
   else if (isdigit (*cssRule))
     cssRule = ParseCSSUnit (cssRule, border);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseBorderStyle                                      
  ----------------------------------------------------------------------*/
static char *ParseBorderStyle (char *cssRule, PresentationValue *border)
{
  /* first parse the attribute string */
   border->typed_data.value = 0;
   border->typed_data.unit = STYLE_UNIT_PX;
   border->typed_data.real = FALSE;
   if (!strncasecmp (cssRule, "none", 4))
     border->typed_data.value = STYLE_BORDERNONE;
   else if (!strncasecmp (cssRule, "hidden", 6))
     border->typed_data.value = STYLE_BORDERHIDDEN;
   else if (!strncasecmp (cssRule, "dotted", 6))
     border->typed_data.value = STYLE_BORDERDOTTED;
   else if (!strncasecmp (cssRule, "dashed", 6))
     border->typed_data.value = STYLE_BORDERDASHED;
   else if (!strncasecmp (cssRule, "solid", 5))
     border->typed_data.value = STYLE_BORDERSOLID;
   else if (!strncasecmp (cssRule, "double", 6))
     border->typed_data.value = STYLE_BORDERDOUBLE;
   else if (!strncasecmp (cssRule, "groove", 6))
     border->typed_data.value = STYLE_BORDERGROOVE;
   else if (!strncasecmp (cssRule, "ridge", 5))
     border->typed_data.value = STYLE_BORDERRIDGE;
   else if (!strncasecmp (cssRule, "inset", 5))
     border->typed_data.value = STYLE_BORDERINSET;
   else if (!strncasecmp (cssRule, "outset", 6))
     border->typed_data.value = STYLE_BORDEROUTSET;
   else
     {
       /* invalid style */
       border->typed_data.unit = STYLE_UNIT_INVALID;
       return (cssRule);
     }
   /* the value is parsed now */
   cssRule = SkipWord (cssRule);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSColor: parse a CSS color attribute string    
   we expect the input string describing the attribute to be     
   either a color name, a 3 tuple or an hexadecimal encoding.    
   The color used will be approximed from the current color      
   table                                                         
  ----------------------------------------------------------------------*/
static char *ParseCSSColor (char *cssRule, PresentationValue * val)
{
  char               *ptr;
  unsigned short      redval = (unsigned short) -1;
  unsigned short      greenval = 0;	/* composant of each RGB       */
  unsigned short      blueval = 0;	/* default to red if unknown ! */
  int                 best = 0;	/* best color in list found */

  cssRule = SkipBlanksAndComments (cssRule);
  val->typed_data.unit = STYLE_UNIT_INVALID;
  val->typed_data.real = FALSE;
  val->typed_data.value = 0;
  ptr = TtaGiveRGB (cssRule, &redval, &greenval, &blueval);
  if (ptr == cssRule)
    {
      cssRule = SkipProperty (cssRule);
      val->typed_data.value = 0;
      val->typed_data.unit = STYLE_UNIT_INVALID;
    }
  else
    {
      best = TtaGetThotColor (redval, greenval, blueval);
      val->typed_data.value = best;
      val->typed_data.unit = STYLE_UNIT_REL;
      cssRule = ptr;
    }
  val->typed_data.real = FALSE;
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderTopWidth: parse a CSS BorderTopWidth
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderTopWidth (Element element, PSchema tsch,
				       PresentationContext context, 
				       char *cssRule, CSSInfoPtr css,
				       ThotBool isHTML)
{
  PresentationValue   border;
  
  cssRule = SkipBlanksAndComments (cssRule);
  cssRule = ParseBorderValue (cssRule, &border);
  if (border.typed_data.unit != STYLE_UNIT_INVALID)
    {
      TtaSetStylePresentation (PRBorderTopWidth, element, tsch, context, border);
      border.typed_data.value = 1;
      border.typed_data.unit = STYLE_UNIT_REL;
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderBottomWidth: parse a CSS BorderBottomWidth
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderBottomWidth (Element element, PSchema tsch,
					  PresentationContext context,
					  char *cssRule, CSSInfoPtr css,
					  ThotBool isHTML)
{
  PresentationValue   border;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseBorderValue (cssRule, &border);
  if (border.typed_data.unit != STYLE_UNIT_INVALID)
    {
      TtaSetStylePresentation (PRBorderBottomWidth, element, tsch, context, border);
      border.typed_data.value = 1;
      border.typed_data.unit = STYLE_UNIT_REL;
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderLeftWidth: parse a CSS BorderLeftWidth
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderLeftWidth (Element element, PSchema tsch,
					PresentationContext context,
					char *cssRule, CSSInfoPtr css,
					ThotBool isHTML)
{
  PresentationValue   border;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseBorderValue (cssRule, &border);
  if (border.typed_data.unit != STYLE_UNIT_INVALID)
    {
      TtaSetStylePresentation (PRBorderLeftWidth, element, tsch, context, border);
      border.typed_data.value = 1;
      border.typed_data.unit = STYLE_UNIT_REL;
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderRightWidth: parse a CSS BorderRightWidth
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderRightWidth (Element element, PSchema tsch,
					 PresentationContext context,
					 char *cssRule, CSSInfoPtr css,
					 ThotBool isHTML)
{
  PresentationValue   border;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseBorderValue (cssRule, &border);
  if (border.typed_data.unit != STYLE_UNIT_INVALID)
    {
      TtaSetStylePresentation (PRBorderRightWidth, element, tsch, context, border);
      border.typed_data.value = 1;
      border.typed_data.unit = STYLE_UNIT_REL;
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderWidth: parse a CSS BorderWidth
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderWidth (Element element, PSchema tsch,
				    PresentationContext context,
				    char *cssRule, CSSInfoPtr css,
				    ThotBool isHTML)
{
  char *ptrT, *ptrR, *ptrB, *ptrL;

  ptrT = SkipBlanksAndComments (cssRule);
  /* First parse Border-Top */
  ptrR = ParseCSSBorderTopWidth (element, tsch, context, ptrT, css, isHTML);
  ptrR = SkipBlanksAndComments (ptrR);
  if (*ptrR == ';' || *ptrR == EOS || *ptrR == ',')
    {
      cssRule = ptrR;
      /* apply the Border-Top to all */
      ptrR = ParseCSSBorderRightWidth (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSBorderBottomWidth (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSBorderLeftWidth (element, tsch, context, ptrT, css, isHTML);
    }
  else
    {
      /* parse Border-Right */
      ptrB = ParseCSSBorderRightWidth (element, tsch, context, ptrR, css, isHTML);
      ptrB = SkipBlanksAndComments (ptrB);
      if (*ptrB == ';' || *ptrB == EOS || *ptrB == ',')
	{
	  cssRule = ptrB;
	  /* apply the Border-Top to Border-Bottom */
	  ptrB = ParseCSSBorderBottomWidth (element, tsch, context, ptrT, css, isHTML);
	  /* apply the Border-Right to Border-Left */
	  ptrB = ParseCSSBorderLeftWidth (element, tsch, context, ptrR, css, isHTML);
	}
      else
	{
	  /* parse Border-Bottom */
	  ptrL = ParseCSSBorderBottomWidth (element, tsch, context, ptrB, css, isHTML);
	  ptrL = SkipBlanksAndComments (ptrL);
	  if (*ptrL == ';' || *ptrL == EOS || *ptrL == ',')
	    {
	      cssRule = ptrL;
	      /* apply the Border-Right to Border-Left */
	      ptrL = ParseCSSBorderLeftWidth (element, tsch, context, ptrR, css, isHTML);
	    }
	  else
	    /* parse Border-Left */
	    cssRule = ParseCSSBorderLeftWidth (element, tsch, context, ptrL, css, isHTML);
	  cssRule = SkipBlanksAndComments (cssRule);
	}
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderColorTop: parse a CSS BorderColorTop
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderColorTop (Element element, PSchema tsch,
				     PresentationContext context,
				     char *cssRule, CSSInfoPtr css,
				     ThotBool isHTML)
{
   PresentationValue   best;

   cssRule = ParseCSSColor (cssRule, &best);
   if (best.typed_data.unit != STYLE_UNIT_INVALID)
     /* install the new presentation */
     TtaSetStylePresentation (PRBorderTopColor, element, tsch, context, best);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderColorLeft: parse a CSS BorderColorLeft
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderColorLeft (Element element, PSchema tsch,
				      PresentationContext context,
				      char *cssRule, CSSInfoPtr css,
				      ThotBool isHTML)
{
   PresentationValue   best;

   cssRule = ParseCSSColor (cssRule, &best);
   if (best.typed_data.unit != STYLE_UNIT_INVALID)
     /* install the new presentation */
     TtaSetStylePresentation (PRBorderLeftColor, element, tsch, context, best);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderColorBottom: parse a CSS BorderColorBottom
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderColorBottom (Element element, PSchema tsch,
					PresentationContext context,
					char *cssRule, CSSInfoPtr css,
					ThotBool isHTML)
{
   PresentationValue   best;

   cssRule = ParseCSSColor (cssRule, &best);
   if (best.typed_data.unit != STYLE_UNIT_INVALID)
     /* install the new presentation */
     TtaSetStylePresentation (PRBorderBottomColor, element, tsch, context, best);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderColorRight: parse a CSS BorderColorRight
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderColorRight (Element element, PSchema tsch,
				       PresentationContext context,
				       char *cssRule, CSSInfoPtr css,
				       ThotBool isHTML)
{
   PresentationValue   best;

   cssRule = ParseCSSColor (cssRule, &best);
   if (best.typed_data.unit != STYLE_UNIT_INVALID)
     /* install the new presentation */
     TtaSetStylePresentation (PRBorderRightColor, element, tsch, context, best);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderColor: parse a CSS border-color        
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderColor (Element element, PSchema tsch,
				  PresentationContext context,
				  char *cssRule, CSSInfoPtr css,
				  ThotBool isHTML)
{
  char *ptrT, *ptrR, *ptrB, *ptrL;

  ptrT = SkipBlanksAndComments (cssRule);
  /* First parse Border-Top */
  ptrR = ParseCSSBorderColorTop (element, tsch, context, ptrT, css, isHTML);
  ptrR = SkipBlanksAndComments (ptrR);
  if (*ptrR == ';' || *ptrR == EOS || *ptrR == ',')
    {
      cssRule = ptrR;
      /* apply the Border-Top to all */
      ptrR = ParseCSSBorderColorRight (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSBorderColorBottom (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSBorderColorLeft (element, tsch, context, ptrT, css, isHTML);
    }
  else
    {
      /* parse Border-Right */
      ptrB = ParseCSSBorderColorRight (element, tsch, context, ptrR, css, isHTML);
      ptrB = SkipBlanksAndComments (ptrB);
      if (*ptrB == ';' || *ptrB == EOS || *ptrB == ',')
	{
	  cssRule = ptrB;
	  /* apply the Border-Top to Border-Bottom */
	  ptrB = ParseCSSBorderColorBottom (element, tsch, context, ptrT, css, isHTML);
	  /* apply the Border-Right to Border-Left */
	  ptrB = ParseCSSBorderColorLeft (element, tsch, context, ptrR, css, isHTML);
	}
      else
	{
	  /* parse Border-Bottom */
	  ptrL = ParseCSSBorderColorBottom (element, tsch, context, ptrB, css, isHTML);
	  ptrL = SkipBlanksAndComments (ptrL);
	  if (*ptrL == ';' || *ptrL == EOS || *ptrL == ',')
	    {
	      cssRule = ptrL;
	      /* apply the Border-Right to Border-Left */
	      ptrL = ParseCSSBorderColorLeft (element, tsch, context, ptrR, css, isHTML);
	    }
	  else
	    /* parse Border-Left */
	    cssRule = ParseCSSBorderColorLeft (element, tsch, context, ptrL, css, isHTML);
	  cssRule = SkipBlanksAndComments (cssRule);
	}
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderStyleTop: parse a CSS BorderStyleTop
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderStyleTop (Element element, PSchema tsch,
				     PresentationContext context,
				     char *cssRule, CSSInfoPtr css,
				     ThotBool isHTML)
{
  PresentationValue   border;
  
  cssRule = SkipBlanksAndComments (cssRule);
  cssRule = ParseBorderStyle (cssRule, &border);
  if (border.typed_data.unit != STYLE_UNIT_INVALID)
    TtaSetStylePresentation (PRBorderTopStyle, element, tsch, context, border);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderStyleLeft: parse a CSS BorderStyleLeft
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderStyleLeft (Element element, PSchema tsch,
				      PresentationContext context,
				      char *cssRule, CSSInfoPtr css,
				      ThotBool isHTML)
{
  PresentationValue   border;
  
  cssRule = SkipBlanksAndComments (cssRule);
  cssRule = ParseBorderStyle (cssRule, &border);
  if (border.typed_data.unit != STYLE_UNIT_INVALID)
    TtaSetStylePresentation (PRBorderLeftStyle, element, tsch, context, border);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderStyleBottom: parse a CSS BorderStyleBottom
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderStyleBottom (Element element, PSchema tsch,
					PresentationContext context,
					char *cssRule, CSSInfoPtr css,
					ThotBool isHTML)
{
  PresentationValue   border;
  
  cssRule = SkipBlanksAndComments (cssRule);
  cssRule = ParseBorderStyle (cssRule, &border);
  if (border.typed_data.unit != STYLE_UNIT_INVALID)
    TtaSetStylePresentation (PRBorderBottomStyle, element, tsch, context, border);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderStyleRight: parse a CSS BorderStyleRight
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderStyleRight (Element element, PSchema tsch,
				       PresentationContext context,
				       char *cssRule, CSSInfoPtr css,
				       ThotBool isHTML)
{
  PresentationValue   border;
  
  cssRule = SkipBlanksAndComments (cssRule);
  cssRule = ParseBorderStyle (cssRule, &border);
  if (border.typed_data.unit != STYLE_UNIT_INVALID)
    TtaSetStylePresentation (PRBorderRightStyle, element, tsch, context, border);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderStyleStyle: parse a CSS border-style        
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderStyle (Element element, PSchema tsch,
				  PresentationContext context,
				  char *cssRule, CSSInfoPtr css,
				  ThotBool isHTML)
{
  char *ptrT, *ptrR, *ptrB, *ptrL;

  ptrT = SkipBlanksAndComments (cssRule);
  /* First parse Border-Top */
  ptrR = ParseCSSBorderStyleTop (element, tsch, context, ptrT, css, isHTML);
  ptrR = SkipBlanksAndComments (ptrR);
  if (*ptrR == ';' || *ptrR == EOS || *ptrR == ',')
    {
      cssRule = ptrR;
      /* apply the Border-Top to all */
      ptrR = ParseCSSBorderStyleRight (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSBorderStyleBottom (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSBorderStyleLeft (element, tsch, context, ptrT, css, isHTML);
    }
  else
    {
      /* parse Border-Right */
      ptrB = ParseCSSBorderStyleRight (element, tsch, context, ptrR, css, isHTML);
      ptrB = SkipBlanksAndComments (ptrB);
      if (*ptrB == ';' || *ptrB == EOS || *ptrB == ',')
	{
	  cssRule = ptrB;
	  /* apply the Border-Top to Border-Bottom */
	  ptrB = ParseCSSBorderStyleBottom (element, tsch, context, ptrT, css, isHTML);
	  /* apply the Border-Right to Border-Left */
	  ptrB = ParseCSSBorderStyleLeft (element, tsch, context, ptrR, css, isHTML);
	}
      else
	{
	  /* parse Border-Bottom */
	  ptrL = ParseCSSBorderStyleBottom (element, tsch, context, ptrB, css, isHTML);
	  ptrL = SkipBlanksAndComments (ptrL);
	  if (*ptrL == ';' || *ptrL == EOS || *ptrL == ',')
	    {
	      cssRule = ptrL;
	      /* apply the Border-Right to Border-Left */
	      ptrL = ParseCSSBorderStyleLeft (element, tsch, context, ptrR, css, isHTML);
	    }
	  else
	    /* parse Border-Left */
	    cssRule = ParseCSSBorderStyleLeft (element, tsch, context, ptrL, css, isHTML);
	  cssRule = SkipBlanksAndComments (cssRule);
	}
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderTop: parse a CSS BorderTop
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderTop (Element element, PSchema tsch,
				PresentationContext context, char *cssRule,
				CSSInfoPtr css, ThotBool isHTML)
{
  char           *ptr;

  cssRule = SkipBlanksAndComments (cssRule);
  while (*cssRule != ';' && *cssRule != EOS && *cssRule != ',')
    {
      ptr = cssRule;
      cssRule = ParseCSSBorderStyleTop (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	cssRule = ParseCSSBorderTopWidth (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	cssRule = ParseCSSBorderColorTop (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	/* rule not found */
	cssRule = SkipProperty (cssRule);
      cssRule = SkipBlanksAndComments (cssRule);
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderLeft: parse a CSS BorderLeft
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderLeft (Element element, PSchema tsch,
				 PresentationContext context, char *cssRule,
				 CSSInfoPtr css, ThotBool isHTML)
{
  char           *ptr;

  cssRule = SkipBlanksAndComments (cssRule);
  while (*cssRule != ';' && *cssRule != EOS && *cssRule != ',')
    {
      ptr = cssRule;
      cssRule = ParseCSSBorderStyleLeft (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	cssRule = ParseCSSBorderLeftWidth (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	cssRule = ParseCSSBorderColorLeft (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	/* rule not found */
	cssRule = SkipProperty (cssRule);
      cssRule = SkipBlanksAndComments (cssRule);
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderBottom: parse a CSS BorderBottom
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderBottom (Element element, PSchema tsch,
				   PresentationContext context, char *cssRule,
				   CSSInfoPtr css, ThotBool isHTML)
{
  char           *ptr;

  cssRule = SkipBlanksAndComments (cssRule);
  while (*cssRule != ';' && *cssRule != EOS && *cssRule != ',')
    {
      ptr = cssRule;
      cssRule = ParseCSSBorderStyleBottom (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	cssRule = ParseCSSBorderBottomWidth (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	cssRule = ParseCSSBorderColorBottom (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	/* rule not found */
	cssRule = SkipProperty (cssRule);
      cssRule = SkipBlanksAndComments (cssRule);
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorderRight: parse a CSS BorderRight
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorderRight (Element element, PSchema tsch,
				  PresentationContext context, char *cssRule,
				  CSSInfoPtr css, ThotBool isHTML)
{
  char            *ptr;

  cssRule = SkipBlanksAndComments (cssRule);
  while (*cssRule != ';' && *cssRule != EOS && *cssRule != ',')
    {
      ptr = cssRule;
      cssRule = ParseCSSBorderStyleRight (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	cssRule = ParseCSSBorderRightWidth (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	cssRule = ParseCSSBorderColorRight (element, tsch, context, cssRule, css, isHTML);
      if (ptr == cssRule)
	/* rule not found */
	cssRule = SkipProperty (cssRule);
      cssRule = SkipBlanksAndComments (cssRule);
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBorder: parse a CSS border        
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBorder (Element element, PSchema tsch,
			     PresentationContext context, char *cssRule,
			     CSSInfoPtr css, ThotBool isHTML)
{
  char *ptrT, *ptrR;

  ptrT = SkipBlanksAndComments (cssRule);
  /* First parse Border-Top */
  ptrR = ParseCSSBorderTop (element, tsch, context, ptrT, css, isHTML);
  ptrR = SkipBlanksAndComments (ptrR);
  if (*ptrR == ';' || *ptrR == EOS || *ptrR == ',')
    {
      cssRule = ptrR;
      /* apply the Border-Top to all */
      ptrR = ParseCSSBorderRight (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSBorderBottom (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSBorderLeft (element, tsch, context, ptrT, css, isHTML);
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSClear: parse a CSS clear attribute string    
  ----------------------------------------------------------------------*/
static char *ParseCSSClear (Element element, PSchema tsch,
			    PresentationContext context, char *cssRule,
			    CSSInfoPtr css, ThotBool isHTML)
{
  cssRule = SkipProperty (cssRule);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSDisplay: parse a CSS display attribute string        
  ----------------------------------------------------------------------*/
static char *ParseCSSDisplay (Element element, PSchema tsch,
			      PresentationContext context, char *cssRule,
			      CSSInfoPtr css, ThotBool isHTML)
{
   PresentationValue   pval;

   pval.typed_data.unit = STYLE_UNIT_REL;
   pval.typed_data.real = FALSE;
   cssRule = SkipBlanksAndComments (cssRule);
   if (!strncasecmp (cssRule, "block", 5))
     {
       /* pval.typed_data.value = STYLE_INLINE;
	TtaSetStylePresentation (PRLine, element, tsch, context, pval);
	cssRule = SkipWord (cssRule); */
     }
   else if (!strncasecmp (cssRule, "inline", 6))
     {
       /* pval.typed_data.value = STYLE_INLINE;
	TtaSetStylePresentation (PRLine, element, tsch, context, pval);
	cssRule = SkipWord (cssRule); */
     }
   else if (!strncasecmp (cssRule, "none", 4))
     {
	pval.typed_data.value = STYLE_HIDE;
	TtaSetStylePresentation (PRVisibility, element, tsch, context, pval);
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "list-item", 9))
     cssRule = SkipProperty (cssRule);
   else
     fprintf (stderr, "invalid display value %s\n", cssRule);

   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSFloat: parse a CSS float attribute string    
  ----------------------------------------------------------------------*/
static char *ParseCSSFloat (Element element, PSchema tsch,
			    PresentationContext context, char *cssRule,
			    CSSInfoPtr css, ThotBool isHTML)
{
  cssRule = SkipProperty (cssRule);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSLetterSpacing: parse a CSS letter-spacing    
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSLetterSpacing (Element element, PSchema tsch,
				    PresentationContext context, char *cssRule,
				    CSSInfoPtr css, ThotBool isHTML)
{
  cssRule = SkipProperty (cssRule);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSListStyleType: parse a CSS list-style-type
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSListStyleType (Element element, PSchema tsch,
				    PresentationContext context, char *cssRule,
				    CSSInfoPtr css, ThotBool isHTML)
{
  cssRule = SkipProperty (cssRule);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSListStyleImage: parse a CSS list-style-image
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSListStyleImage (Element element, PSchema tsch,
				     PresentationContext context, char *cssRule,
				     CSSInfoPtr css, ThotBool isHTML)
{
  cssRule = SkipProperty (cssRule);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSListStylePosition: parse a CSS list-style-position
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSListStylePosition (Element element, PSchema tsch,
					PresentationContext context,
					char *cssRule, CSSInfoPtr css,
					ThotBool isHTML)
{
  cssRule = SkipProperty (cssRule);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSListStyle: parse a CSS list-style            
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSListStyle (Element element, PSchema tsch,
				PresentationContext context, char *cssRule,
				CSSInfoPtr css, ThotBool isHTML)
{
  cssRule = SkipProperty (cssRule);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSTextAlign: parse a CSS text-align            
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSTextAlign (Element element, PSchema tsch,
				PresentationContext context, char *cssRule,
				CSSInfoPtr css, ThotBool isHTML)
{
   PresentationValue   align;

   align.typed_data.value = 0;
   align.typed_data.unit = STYLE_UNIT_REL;
   align.typed_data.real = FALSE;

   cssRule = SkipBlanksAndComments (cssRule);
   if (!strncasecmp (cssRule, "left", 4))
     {
	align.typed_data.value = AdjustLeft;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "right", 5))
     {
	align.typed_data.value = AdjustRight;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "center", 6))
     {
	align.typed_data.value = Centered;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "justify", 7))
     {
	align.typed_data.value = Justify;
	cssRule = SkipWord (cssRule);
     }
   else
     {
	fprintf (stderr, "invalid align value\n");
	return (cssRule);
     }

   /*
    * install the new presentation.
    */
   if (align.typed_data.value)
     TtaSetStylePresentation (PRAdjust, element, tsch, context, align);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSTextIndent: parse a CSS text-indent          
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSTextIndent (Element element, PSchema tsch,
				 PresentationContext context, char *cssRule,
				 CSSInfoPtr css, ThotBool isHTML)
{
   PresentationValue   pval;

   cssRule = SkipBlanksAndComments (cssRule);
   cssRule = ParseCSSUnit (cssRule, &pval);
   if (pval.typed_data.unit == STYLE_UNIT_INVALID)
     return (cssRule);
   /* install the attribute */
   TtaSetStylePresentation (PRIndent, element, tsch, context, pval);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSTextTransform: parse a CSS text-transform    
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSTextTransform (Element element, PSchema tsch,
				    PresentationContext context, char *cssRule,
				    CSSInfoPtr css, ThotBool isHTML)
{
  cssRule = SkipProperty (cssRule);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSVerticalAlign: parse a CSS vertical-align    
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSVerticalAlign (Element element, PSchema tsch,
				    PresentationContext context, char *cssRule,
				    CSSInfoPtr css, ThotBool isHTML)
{
  cssRule = SkipProperty (cssRule);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSWhiteSpace: parse a CSS white-space          
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSWhiteSpace (Element element, PSchema tsch,
				 PresentationContext context, char *cssRule,
				 CSSInfoPtr css, ThotBool isHTML)
{
   cssRule = SkipBlanksAndComments (cssRule);
   if (!strncasecmp (cssRule, "normal", 6))
     cssRule = SkipWord (cssRule);
   else if (!strncasecmp (cssRule, "pre", 3))
     cssRule = SkipWord (cssRule);
   else
     return (cssRule);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSWordSpacing: parse a CSS word-spacing        
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSWordSpacing (Element element, PSchema tsch,
				  PresentationContext context, char *cssRule,
				  CSSInfoPtr css, ThotBool isHTML)
{
  cssRule = SkipProperty (cssRule);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSLineSpacing: parse a CSS font leading string 
   we expect the input string describing the attribute to be     
   value% or value                                               
  ----------------------------------------------------------------------*/
static char *ParseCSSLineSpacing (Element element, PSchema tsch,
				  PresentationContext context, char *cssRule,
				  CSSInfoPtr css, ThotBool isHTML)
{
   PresentationValue   lead;

   cssRule = ParseCSSUnit (cssRule, &lead);
   if (lead.typed_data.unit == STYLE_UNIT_INVALID)
     {
       /* invalid line spacing */
	return (cssRule);
     }
   /* install the new presentation */
   TtaSetStylePresentation (PRLineSpacing, element, tsch, context, lead);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSFontSize: parse a CSS font size attr string  
   we expect the input string describing the attribute to be     
   xx-small, x-small, small, medium, large, x-large, xx-large      
   or an absolute size, or an imcrement relative to the parent     
  ----------------------------------------------------------------------*/
static char *ParseCSSFontSize (Element element, PSchema tsch,
			       PresentationContext context, char *cssRule,
			       CSSInfoPtr css, ThotBool isHTML)
{
   PresentationValue   pval;
   char               *ptr = NULL;
   ThotBool	       real;

   pval.typed_data.real = FALSE;
   cssRule = SkipBlanksAndComments (cssRule);
   if (!strncasecmp (cssRule, "larger", 6))
     {
	pval.typed_data.unit = STYLE_UNIT_PERCENT;
	pval.typed_data.value = 130;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "smaller", 7))
     {
	pval.typed_data.unit = STYLE_UNIT_PERCENT;
	pval.typed_data.value = 80;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "xx-small", 8))
     {
	pval.typed_data.unit = STYLE_UNIT_REL;
	pval.typed_data.value = 1;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "x-small", 7))
     {
	pval.typed_data.unit = STYLE_UNIT_REL;
	pval.typed_data.value = 2;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "small", 5))
     {
	pval.typed_data.unit = STYLE_UNIT_REL;
	pval.typed_data.value = 3;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "medium", 6))
     {
	pval.typed_data.unit = STYLE_UNIT_REL;
	pval.typed_data.value = 4;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "large", 5))
     {
	pval.typed_data.unit = STYLE_UNIT_REL;
	pval.typed_data.value = 5;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "x-large", 7))
     {
	pval.typed_data.unit = STYLE_UNIT_REL;
	pval.typed_data.value = 6;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "xx-large", 8))
     {
	pval.typed_data.unit = STYLE_UNIT_REL;
	pval.typed_data.value = 7;
	cssRule = SkipWord (cssRule);
     }
   else
     {
       /* look for a '/' within the current cssRule */
       ptr = strchr (cssRule, '/');
       if (ptr != NULL)
	 {
	   /* keep the line spacing rule */
	   ptr[0] = EOS;
	   ptr = &ptr[1];
	 }
       cssRule = ParseCSSUnit (cssRule, &pval);
       if (pval.typed_data.unit == STYLE_UNIT_INVALID ||
           pval.typed_data.value < 0)
	 return (cssRule);
       if (pval.typed_data.unit == STYLE_UNIT_REL && pval.typed_data.value > 0)
	 /* CSS relative sizes have to be higher than Thot ones */
	 pval.typed_data.value += 1;
       else 
	 {
	   real = pval.typed_data.real;
	   if (pval.typed_data.unit == STYLE_UNIT_EM)
	     {
	       if (real)
		 {
		   pval.typed_data.value /= 10;
		   pval.typed_data.real = FALSE;
		   real = FALSE;
		 }
	       else
		 pval.typed_data.value *= 100;
	       pval.typed_data.unit = STYLE_UNIT_PERCENT;
	     }
	 }

     }

   /* install the presentation style */
   TtaSetStylePresentation (PRSize, element, tsch, context, pval);

   if (ptr != NULL)
     cssRule = ParseCSSLineSpacing (element, tsch, context, ptr, css, isHTML);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSFontFamily: parse a CSS font family string   
   we expect the input string describing the attribute to be     
   a common generic font style name                                
  ----------------------------------------------------------------------*/
static char *ParseCSSFontFamily (Element element, PSchema tsch,
				 PresentationContext context, char *cssRule,
				 CSSInfoPtr css, ThotBool isHTML)
{
  PresentationValue   font;
  char              quoteChar;

  font.typed_data.value = 0;
  font.typed_data.unit = STYLE_UNIT_REL;
  font.typed_data.real = FALSE;
  cssRule = SkipBlanksAndComments (cssRule);
  if (*cssRule == '"' || *cssRule == '\'')
     {
     quoteChar = *cssRule;
     cssRule++;
     }
  else
     quoteChar = EOS;

  if (!strncasecmp (cssRule, "times", 5))
      font.typed_data.value = STYLE_FONT_TIMES;
  else if (!strncasecmp (cssRule, "serif", 5))
      font.typed_data.value = STYLE_FONT_TIMES;
  else if (!strncasecmp (cssRule, "helvetica", 9) ||
           !strncasecmp (cssRule, "verdana", 7))
      font.typed_data.value = STYLE_FONT_HELVETICA;
  else if (!strncasecmp (cssRule, "sans-serif", 10))
      font.typed_data.value = STYLE_FONT_HELVETICA;
  else if (!strncasecmp (cssRule, "courier", 7))
      font.typed_data.value = STYLE_FONT_COURIER;
  else if (!strncasecmp (cssRule, "monospace", 9))
      font.typed_data.value = STYLE_FONT_COURIER;
  else
    /* unknown font name.  Skip it */
    {
      if (quoteChar) {
         cssRule = SkipQuotedString (cssRule, quoteChar);
      } else
         cssRule = SkipWord (cssRule);
      cssRule = SkipBlanksAndComments (cssRule);
      if (*cssRule == ',')
	{
	cssRule++;
	cssRule = ParseCSSFontFamily (element, tsch, context, cssRule, css, isHTML);
        return (cssRule);
	}
    }

  if (font.typed_data.value != 0)
     {
     cssRule = SkipProperty (cssRule);
     /* install the new presentation */
     TtaSetStylePresentation (PRFont, element, tsch, context, font);
     }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSFontWeight: parse a CSS font weight string   
   we expect the input string describing the attribute to be     
   normal, bold, bolder, lighter, 100, 200, 300, ... 900, inherit.
  ----------------------------------------------------------------------*/
static char *ParseCSSFontWeight (Element element, PSchema tsch,
				 PresentationContext context, char *cssRule,
				 CSSInfoPtr css, ThotBool isHTML)
{
   PresentationValue   weight;

   weight.typed_data.value = 0;
   weight.typed_data.unit = STYLE_UNIT_REL;
   weight.typed_data.real = FALSE;
   cssRule = SkipBlanksAndComments (cssRule);
   if (!strncasecmp (cssRule, "100", 3) && !isalpha (cssRule[3]))
     {
	weight.typed_data.value = -3;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "200", 3) && !isalpha (cssRule[3]))
     {
	weight.typed_data.value = -2;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "300", 3) && ! isalpha(cssRule[3]))
     {
	weight.typed_data.value = -1;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "normal", 6) || (!strncasecmp (cssRule, "400", 3) && !isalpha (cssRule[3])))
     {
	weight.typed_data.value = 0;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "500", 3) && !isalpha (cssRule[3]))
     {
	weight.typed_data.value = +1;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "600", 3) && !isalpha (cssRule[3]))
     {
	weight.typed_data.value = +2;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "bold", 4) || (!strncasecmp (cssRule, "700", 3) && !isalpha (cssRule[3])))
     {
	weight.typed_data.value = +3;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "800", 3) && !isalpha (cssRule[3]))
     {
	weight.typed_data.value = +4;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "900", 3) && !isalpha (cssRule[3]))
     {
	weight.typed_data.value = +5;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "inherit", 7) || !strncasecmp (cssRule, "bolder", 6) || !strncasecmp (cssRule, "lighter", 7))
     {
     /* not implemented */
     cssRule = SkipWord (cssRule);
     return (cssRule);
     }
   else
     return (cssRule);

   /*
    * Here we have to reduce since only two font weight values are supported
    * by the Thot presentation API.
    */
    if (weight.typed_data.value > 0)
       weight.typed_data.value = STYLE_WEIGHT_BOLD;
    else
       weight.typed_data.value = STYLE_WEIGHT_NORMAL;

   /* install the new presentation */
   TtaSetStylePresentation (PRWeight, element, tsch, context, weight);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSFontVariant: parse a CSS font variant string     
   we expect the input string describing the attribute to be     
   normal or small-caps
  ----------------------------------------------------------------------*/
static char *ParseCSSFontVariant (Element element, PSchema tsch,
				  PresentationContext context, char *cssRule,
				  CSSInfoPtr css, ThotBool isHTML)
{
   PresentationValue   style;

   style.typed_data.value = 0;
   style.typed_data.unit = STYLE_UNIT_REL;
   style.typed_data.real = FALSE;
   cssRule = SkipBlanksAndComments (cssRule);
   if (!strncasecmp (cssRule, "small-caps", 10))
     {
       /* Not supported yet */
       cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "normal", 6))
     {
       /* Not supported yet */
       cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "inherit", 7))
     {
       /* Not supported yet */
       cssRule = SkipWord (cssRule);
     }
   else
       return (cssRule);

   return (cssRule);
}


/*----------------------------------------------------------------------
   ParseCSSFontStyle: parse a CSS font style string     
   we expect the input string describing the attribute to be     
   italic, oblique or normal                         
  ----------------------------------------------------------------------*/
static char *ParseCSSFontStyle (Element element, PSchema tsch,
				PresentationContext context, char *cssRule,
				CSSInfoPtr css, ThotBool isHTML)
{
   PresentationValue   style;
   PresentationValue   size;

   style.typed_data.value = 0;
   style.typed_data.unit = STYLE_UNIT_REL;
   style.typed_data.real = FALSE;
   size.typed_data.value = 0;
   size.typed_data.unit = STYLE_UNIT_REL;
   size.typed_data.real = FALSE;
   cssRule = SkipBlanksAndComments (cssRule);
   if (!strncasecmp (cssRule, "italic", 6))
     {
	style.typed_data.value = STYLE_FONT_ITALICS;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "oblique", 7))
     {
	style.typed_data.value = STYLE_FONT_OBLIQUE;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "normal", 6))
     {
	style.typed_data.value = STYLE_FONT_ROMAN;
	cssRule = SkipWord (cssRule);
     }
   else
     {
       /* invalid font style */
	return (cssRule);
     }

   /*
    * install the new presentation.
    */
   if (style.typed_data.value != 0)
        TtaSetStylePresentation (PRStyle, element, tsch, context, style);
   if (size.typed_data.value != 0)
     {
	PresentationValue   previous_size;

	if (!TtaGetStylePresentation (PRSize, element, tsch, context, &previous_size))
	  {
	     /* !!!!!!!!!!!!!!!!!!!!!!!! Unite + relatif !!!!!!!!!!!!!!!! */
	     size.typed_data.value += previous_size.typed_data.value;
	     TtaSetStylePresentation (PRSize, element, tsch, context, size);
	  }
	else
	  {
	     size.typed_data.value = 10;
	     TtaSetStylePresentation (PRSize, element, tsch, context, size);
	  }
     }
   return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSFont: parse a CSS font attribute string
  we expect the input string describing the attribute to be
  !!!!!!                                  
  ----------------------------------------------------------------------*/
static char *ParseCSSFont (Element element, PSchema tsch,
			   PresentationContext context, char *cssRule,
			   CSSInfoPtr css, ThotBool isHTML)
{
  char           *ptr;

  cssRule = SkipBlanksAndComments (cssRule);
  if (!strncasecmp (cssRule, "caption", 7))
    ;
  else if (!strncasecmp (cssRule, "icon", 4))
    ;
  else if (!strncasecmp (cssRule, "menu", 4))
    ;
  else if (!strncasecmp (cssRule, "message-box", 11))
    ;
  else if (!strncasecmp (cssRule, "small-caption", 13))
    ;
  else if (!strncasecmp (cssRule, "status-bar", 10))
    ;
  else
    {
      while (*cssRule != ';' && *cssRule != EOS && *cssRule != ',')
	{
	  ptr = cssRule;
	  cssRule = ParseCSSFontStyle (element, tsch, context, cssRule, css, isHTML);
	  if (ptr == cssRule)
	    cssRule = ParseCSSFontVariant (element, tsch, context, cssRule, css, isHTML);
	  if (ptr == cssRule)
	    cssRule = ParseCSSFontWeight (element, tsch, context, cssRule, css, isHTML);
	  if (ptr == cssRule)
	    cssRule = ParseCSSFontSize (element, tsch, context, cssRule, css, isHTML);
	  if (ptr == cssRule)
	    cssRule = ParseCSSFontFamily (element, tsch, context, cssRule, css, isHTML);
	  cssRule = SkipBlanksAndComments (cssRule);
	}
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSTextDecoration: parse a CSS text decor string   
  we expect the input string describing the attribute to be     
  underline, overline, line-through, box, shadowbox, box3d,       
  cartouche, blink or none
  ----------------------------------------------------------------------*/
static char *ParseCSSTextDecoration (Element element, PSchema tsch,
				     PresentationContext context, char *cssRule,
				     CSSInfoPtr css, ThotBool isHTML)
{
   PresentationValue   decor;

   decor.typed_data.value = 0;
   decor.typed_data.unit = STYLE_UNIT_REL;
   decor.typed_data.real = FALSE;
   cssRule = SkipBlanksAndComments (cssRule);
   if (!strncasecmp (cssRule, "underline", strlen ("underline")))
     {
	decor.typed_data.value = Underline;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "overline", strlen ("overline")))
     {
	decor.typed_data.value = Overline;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "line-through", strlen ("line-through")))
     {
	decor.typed_data.value = CrossOut;
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "box", strlen ("box")))
     {
       /* the box text-decoration attribute is not yet supported */
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "boxshadow", strlen ("boxshadow")))
     {
       /* the boxshadow text-decoration attribute is not yet supported */
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "box3d", strlen ("box3d")))
     {
       /* the box3d text-decoration attribute is not yet supported */
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "cartouche", strlen ("cartouche")))
     {
	/*the cartouche text-decoration attribute is not yet supported */
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "blink", strlen ("blink")))
     {
	/*the blink text-decoration attribute will not be supported */
	cssRule = SkipWord (cssRule);
     }
   else if (!strncasecmp (cssRule, "none", strlen ("none")))
     {
	decor.typed_data.value = NoUnderline;
	cssRule = SkipWord (cssRule);
     }
   else
     {
	fprintf (stderr, "invalid text decoration\n");
	return (cssRule);
     }

   /*
    * install the new presentation.
    */
   if (decor.typed_data.value)
     {
       TtaSetStylePresentation (PRUnderline, element, tsch, context, decor);
     }
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSHeight: parse a CSS height attribute
  ----------------------------------------------------------------------*/
static char *ParseCSSHeight (Element element, PSchema tsch,
				 PresentationContext context, char *cssRule, CSSInfoPtr css, ThotBool isHTML)
{
   cssRule = SkipBlanksAndComments (cssRule);

   /* first parse the attribute string */
   if (!strcasecmp (cssRule, "auto"))
     {
	cssRule = SkipWord (cssRule);
	/* ParseCSSHeight: auto */
	return (cssRule);
     }
   else
     cssRule = SkipProperty (cssRule);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSWidth: parse a CSS width attribute
  ----------------------------------------------------------------------*/
static char *ParseCSSWidth (Element element, PSchema tsch,
			      PresentationContext context,
			      char *cssRule, CSSInfoPtr css,
			      ThotBool isHTML)
{
   cssRule = SkipBlanksAndComments (cssRule);

   /* first parse the attribute string */
   if (!strcasecmp (cssRule, "auto"))
     {
	cssRule = SkipWord (cssRule);
	return (cssRule);
     }
   else
     cssRule = SkipProperty (cssRule);
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSMarginTop: parse a CSS margin-top attribute
  ----------------------------------------------------------------------*/
static char *ParseCSSMarginTop (Element element, PSchema tsch,
				  PresentationContext context,
				  char *cssRule, CSSInfoPtr css,
				  ThotBool isHTML)
{
  PresentationValue   margin;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseCSSUnit (cssRule, &margin);
  if (margin.typed_data.unit != STYLE_UNIT_INVALID)
    {
      TtaSetStylePresentation (PRMarginTop, element, tsch, context, margin);
      if (margin.typed_data.value < 0)
	TtaSetStylePresentation (PRVertOverflow, element, tsch, context, margin);
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSMarginBottom: parse a CSS margin-bottom attribute
  ----------------------------------------------------------------------*/
static char *ParseCSSMarginBottom (Element element, PSchema tsch,
				     PresentationContext context,
				     char *cssRule, CSSInfoPtr css,
				     ThotBool isHTML)
{
  PresentationValue   margin;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseCSSUnit (cssRule, &margin);
  if (margin.typed_data.unit != STYLE_UNIT_INVALID)
    TtaSetStylePresentation (PRMarginBottom, element, tsch, context, margin);
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSMarginLeft: parse a CSS margin-left attribute string
  ----------------------------------------------------------------------*/
static char *ParseCSSMarginLeft (Element element, PSchema tsch,
				   PresentationContext context,
				   char *cssRule, CSSInfoPtr css,
				   ThotBool isHTML)
{
  PresentationValue   margin;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseCSSUnit (cssRule, &margin);
  if (margin.typed_data.unit != STYLE_UNIT_INVALID)
    {
      TtaSetStylePresentation (PRMarginLeft, element, tsch, context, margin);
      if (margin.typed_data.value < 0)
	TtaSetStylePresentation (PRHorizOverflow, element, tsch, context, margin);
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSMarginRight: parse a CSS margin-right attribute string
  ----------------------------------------------------------------------*/
static char *ParseCSSMarginRight (Element element, PSchema tsch,
				    PresentationContext context,
				    char *cssRule, CSSInfoPtr css,
				    ThotBool isHTML)
{
  PresentationValue   margin;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseCSSUnit (cssRule, &margin);
  if (margin.typed_data.unit != STYLE_UNIT_INVALID)
      TtaSetStylePresentation (PRMarginRight, element, tsch, context, margin);
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSMargin: parse a CSS margin attribute string
  ----------------------------------------------------------------------*/
static char *ParseCSSMargin (Element element, PSchema tsch,
			       PresentationContext context,
			       char *cssRule, CSSInfoPtr css,
			       ThotBool isHTML)
{
  char *ptrT, *ptrR, *ptrB, *ptrL;

  ptrT = SkipBlanksAndComments (cssRule);
  /* First parse Margin-Top */
  ptrR = ParseCSSMarginTop (element, tsch, context, ptrT, css, isHTML);
  ptrR = SkipBlanksAndComments (ptrR);
  if (*ptrR == ';' || *ptrR == EOS || *ptrR == ',')
    {
      cssRule = ptrR;
      /* apply the Margin-Top to all */
      ptrR = ParseCSSMarginRight (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSMarginBottom (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSMarginLeft (element, tsch, context, ptrT, css, isHTML);
    }
  else
    {
      /* parse Margin-Right */
      ptrB = ParseCSSMarginRight (element, tsch, context, ptrR, css, isHTML);
      ptrB = SkipBlanksAndComments (ptrB);
      if (*ptrB == ';' || *ptrB == EOS || *ptrB == ',')
	{
	  cssRule = ptrB;
	  /* apply the Margin-Top to Margin-Bottom */
	  ptrB = ParseCSSMarginBottom (element, tsch, context, ptrT, css, isHTML);
	  /* apply the Margin-Right to Margin-Left */
	  ptrB = ParseCSSMarginLeft (element, tsch, context, ptrR, css, isHTML);
	}
      else
	{
	  /* parse Margin-Bottom */
	  ptrL = ParseCSSMarginBottom (element, tsch, context, ptrB, css, isHTML);
	  ptrL = SkipBlanksAndComments (ptrL);
	  if (*ptrL == ';' || *ptrL == EOS || *ptrL == ',')
	    {
	      cssRule = ptrL;
	      /* apply the Margin-Right to Margin-Left */
	      ptrL = ParseCSSMarginLeft (element, tsch, context, ptrR, css, isHTML);
	    }
	  else
	    /* parse Margin-Left */
	    cssRule = ParseCSSMarginLeft (element, tsch, context, ptrL, css, isHTML);
	  cssRule = SkipBlanksAndComments (cssRule);
	}
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSPaddingTop: parse a CSS PaddingTop attribute string
  ----------------------------------------------------------------------*/
static char *ParseCSSPaddingTop (Element element, PSchema tsch,
				 PresentationContext context,
				   char *cssRule, CSSInfoPtr css,
				   ThotBool isHTML)
{
  PresentationValue   padding;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseCSSUnit (cssRule, &padding);
  if (padding.typed_data.unit != STYLE_UNIT_INVALID)
      TtaSetStylePresentation (PRPaddingTop, element, tsch, context, padding);
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSPaddingBottom: parse a CSS PaddingBottom attribute string
  ----------------------------------------------------------------------*/
static char *ParseCSSPaddingBottom (Element element, PSchema tsch,
				      PresentationContext context,
				      char *cssRule, CSSInfoPtr css,
				      ThotBool isHTML)
{
  PresentationValue   padding;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseCSSUnit (cssRule, &padding);
  if (padding.typed_data.unit != STYLE_UNIT_INVALID)
      TtaSetStylePresentation (PRPaddingBottom, element, tsch, context, padding);
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSPaddingLeft: parse a CSS PaddingLeft attribute string.
  ----------------------------------------------------------------------*/
static char *ParseCSSPaddingLeft (Element element, PSchema tsch,
				    PresentationContext context,
				    char *cssRule, CSSInfoPtr css,
				    ThotBool isHTML)
{
  PresentationValue   padding;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseCSSUnit (cssRule, &padding);
  if (padding.typed_data.unit != STYLE_UNIT_INVALID)
      TtaSetStylePresentation (PRPaddingLeft, element, tsch, context, padding);
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSPaddingRight: parse a CSS PaddingRight attribute string.
  ----------------------------------------------------------------------*/
static char *ParseCSSPaddingRight (Element element, PSchema tsch,
				     PresentationContext context,
				     char *cssRule, CSSInfoPtr css,
				     ThotBool isHTML)
{
  PresentationValue   padding;
  
  cssRule = SkipBlanksAndComments (cssRule);
  /* first parse the attribute string */
  cssRule = ParseCSSUnit (cssRule, &padding);
  if (padding.typed_data.unit != STYLE_UNIT_INVALID)
      TtaSetStylePresentation (PRPaddingRight, element, tsch, context, padding);
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSPadding: parse a CSS padding attribute string. 
  ----------------------------------------------------------------------*/
static char *ParseCSSPadding (Element element, PSchema tsch,
				PresentationContext context,
				char *cssRule, CSSInfoPtr css,
				ThotBool isHTML)
{
  char *ptrT, *ptrR, *ptrB, *ptrL;

  ptrT = SkipBlanksAndComments (cssRule);
  /* First parse Padding-Top */
  ptrR = ParseCSSPaddingTop (element, tsch, context, ptrT, css, isHTML);
  ptrR = SkipBlanksAndComments (ptrR);
  if (*ptrR == ';' || *ptrR == EOS || *ptrR == ',')
    {
      cssRule = ptrR;
      /* apply the Padding-Top to all */
      ptrR = ParseCSSPaddingRight (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSPaddingBottom (element, tsch, context, ptrT, css, isHTML);
      ptrR = ParseCSSPaddingLeft (element, tsch, context, ptrT, css, isHTML);
    }
  else
    {
      /* parse Padding-Right */
      ptrB = ParseCSSPaddingRight (element, tsch, context, ptrR, css, isHTML);
      ptrB = SkipBlanksAndComments (ptrB);
      if (*ptrB == ';' || *ptrB == EOS || *ptrB == ',')
	{
	  cssRule = ptrB;
	  /* apply the Padding-Top to Padding-Bottom */
	  ptrB = ParseCSSPaddingBottom (element, tsch, context, ptrT, css, isHTML);
	  /* apply the Padding-Right to Padding-Left */
	  ptrB = ParseCSSPaddingLeft (element, tsch, context, ptrR, css, isHTML);
	}
      else
	{
	  /* parse Padding-Bottom */
	  ptrL = ParseCSSPaddingBottom (element, tsch, context, ptrB, css, isHTML);
	  ptrL = SkipBlanksAndComments (ptrL);
	  if (*ptrL == ';' || *ptrL == EOS || *ptrL == ',')
	    {
	      cssRule = ptrL;
	      /* apply the Padding-Right to Padding-Left */
	      ptrL = ParseCSSPaddingLeft (element, tsch, context, ptrR, css, isHTML);
	    }
	  else
	    /* parse Padding-Left */
	    cssRule = ParseCSSPaddingLeft (element, tsch, context, ptrL, css, isHTML);
	  cssRule = SkipBlanksAndComments (cssRule);
	}
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSForeground: parse a CSS foreground attribute 
  ----------------------------------------------------------------------*/
static char *ParseCSSForeground (Element element, PSchema tsch,
					  PresentationContext context,
					  char *cssRule,
					  CSSInfoPtr css, ThotBool isHTML)
{
   PresentationValue   best;

   cssRule = ParseCSSColor (cssRule, &best);
   if (best.typed_data.unit != STYLE_UNIT_INVALID)
     /* install the new presentation */
     TtaSetStylePresentation (PRForeground, element, tsch, context, best);
   return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSBackgroundColor: parse a CSS background color attribute 
  ----------------------------------------------------------------------*/
static char *ParseCSSBackgroundColor (Element element, PSchema tsch,
					PresentationContext context,
					char *cssRule,
					CSSInfoPtr css, ThotBool isHTML)
{
  PresentationValue     best;
  unsigned int          savedtype = 0;
  ThotBool              moved;

  /* move the BODY rule to the HTML element */
  moved = (context->type == HTML_EL_BODY && isHTML);
  if (moved)
    {
      if (element)
	element = TtaGetMainRoot (context->doc);
      else
	{
	  savedtype = context->type;
	  context->type = HTML_EL_Document;
	}
    }

  best.typed_data.unit = STYLE_UNIT_INVALID;
  best.typed_data.real = FALSE;
  if (!strncasecmp (cssRule, "transparent", strlen ("transparent")))
    {
      best.typed_data.value = STYLE_PATTERN_NONE;
      best.typed_data.unit = STYLE_UNIT_REL;
      TtaSetStylePresentation (PRFillPattern, element, tsch, context, best);
      cssRule = SkipWord (cssRule);
    }
  else
    {
      cssRule = ParseCSSColor (cssRule, &best);
      if (best.typed_data.unit != STYLE_UNIT_INVALID)
	{
	  /* install the new presentation. */
	  TtaSetStylePresentation (PRBackground, element, tsch, context, best);
	  /* thot specificity: need to set fill pattern for background color */
	  best.typed_data.value = STYLE_PATTERN_BACKGROUND;
	  best.typed_data.unit = STYLE_UNIT_REL;
	  TtaSetStylePresentation (PRFillPattern, element, tsch, context, best);
	  best.typed_data.value = 1;
	  best.typed_data.unit = STYLE_UNIT_REL;
	  TtaSetStylePresentation (PRShowBox, element, tsch, context, best);
	}
    }

  /* restore the refered element */
  if (moved && !element)
    context->type = savedtype;
  return (cssRule);
}


/*----------------------------------------------------------------------
  ParseSVGStroke: parse a SVG stroke property
  ----------------------------------------------------------------------*/
static char *ParseSVGStroke (Element element, PSchema tsch,
			     PresentationContext context, char *cssRule,
			     CSSInfoPtr css, ThotBool isHTML)
{
  PresentationValue     best;

  best.typed_data.unit = STYLE_UNIT_INVALID;
  best.typed_data.real = FALSE;
  if (!strncasecmp (cssRule, "none", 4))
    {
      best.typed_data.value = -2;  /* -2 means transparent */
      best.typed_data.unit = STYLE_UNIT_REL;
      TtaSetStylePresentation (PRForeground, element, tsch, context, best);
      cssRule = SkipWord (cssRule);
    }
  else
    {
      cssRule = ParseCSSColor (cssRule, &best);
      if (best.typed_data.unit != STYLE_UNIT_INVALID)
	/* install the new presentation */
	TtaSetStylePresentation (PRForeground, element, tsch, context, best);
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseSVGFill: parse a SVG fill property
  ----------------------------------------------------------------------*/
static char *ParseSVGFill (Element element, PSchema tsch,
			   PresentationContext context, char *cssRule,
			   CSSInfoPtr css, ThotBool isHTML)
{
  PresentationValue     best;

  best.typed_data.unit = STYLE_UNIT_INVALID;
  best.typed_data.real = FALSE;
  if (!strncasecmp (cssRule, "none", 4))
    {
      best.typed_data.value = STYLE_PATTERN_NONE;
      best.typed_data.unit = STYLE_UNIT_REL;
      TtaSetStylePresentation (PRFillPattern, element, tsch, context, best);
      cssRule = SkipWord (cssRule);
    }
  else
    {
      cssRule = ParseCSSColor (cssRule, &best);
      if (best.typed_data.unit != STYLE_UNIT_INVALID)
	{
	  /* install the new presentation. */
	  TtaSetStylePresentation (PRBackground, element, tsch, context, best);
	  /* thot specificity: need to set fill pattern for background color */
	  best.typed_data.value = STYLE_PATTERN_BACKGROUND;
	  best.typed_data.unit = STYLE_UNIT_REL;
	  TtaSetStylePresentation (PRFillPattern, element, tsch, context, best);
	}
    }
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSBackgroundImageCallback: Callback called asynchronously by
  FetchImage when a background image has been fetched.
  ----------------------------------------------------------------------*/
void ParseCSSBackgroundImageCallback (Document doc, Element element,
				      char *file, void *extra)
{
  DisplayMode                dispMode;
  BackgroundImageCallbackPtr callblock;
  Element                    el;
  PSchema                    tsch;
  PresentationContext        context;
  PresentationValue          image;
  PresentationValue          value;

  callblock = (BackgroundImageCallbackPtr) extra;
  if (callblock == NULL)
    return;

  /* avoid too many redisplay */
  dispMode = TtaGetDisplayMode (doc);
  if (dispMode == DisplayImmediately)
    TtaSetDisplayMode (doc, DeferredDisplay);

  el = callblock->el;
  tsch = callblock->tsch;
  context = &callblock->context.specific;

  /* Ok the image was fetched, finish the background-image handling */
  image.pointer = file;
  TtaSetStylePresentation (PRBackgroundPicture, el, tsch, context, image);

  /* enforce the showbox */
  value.typed_data.value = 1;
  value.typed_data.unit = STYLE_UNIT_REL;
  value.typed_data.real = FALSE;
  TtaSetStylePresentation (PRShowBox, el, tsch, context, value);

  TtaFreeMemory (callblock);
  /* restore the display mode */
  if (dispMode == DisplayImmediately)
    TtaSetDisplayMode (doc, dispMode);
}


/*----------------------------------------------------------------------
   GetCSSBackgroundURL searches a CSS BackgroundImage url within
   the styleString.
   Returns NULL or a new allocated url string.
  ----------------------------------------------------------------------*/
char *GetCSSBackgroundURL (char *styleString)
{
  char            *b, *e, *ptr;
  int              len;

  ptr = NULL;
  b = strstr (styleString, "url");
  if (b != NULL)
    {
      b += 3;
      b = SkipBlanksAndComments (b);
      if (*b == '(')
	{
	  b++;
	  b = SkipBlanksAndComments (b);
	  /*** Caution: Strings can either be written with double quotes or
	       with single quotes. Only double quotes are handled here.
	       Escaped quotes are not handled. See function SkipQuotedString */
	  if (*b == '"')
	    {
	      b++;
	      /* search the url end */
	      e = b;
	      while (*e != EOS && *e != '"')
		e++;
	    }
	  else
	    {
	      /* search the url end */
	      e = b;
	      while (*e != EOS && *e != ')')
		e++;
	    }
	  if (*e != EOS)
	    {
	      len = (int)(e - b);
	      ptr = (char*) TtaGetMemory (len+1);
	      strncpy (ptr, b, len);
	      ptr[len] = EOS;
	    }
	}
    }
  return (ptr);
}


/*----------------------------------------------------------------------
  ParseCSSBackgroundImage: parse a CSS BackgroundImage attribute string.
  ----------------------------------------------------------------------*/
static char *ParseCSSBackgroundImage (Element element, PSchema tsch,
				      PresentationContext context,
				      char *cssRule, CSSInfoPtr css,
				      ThotBool isHTML)
{
  Element                    el;
  GenericContext             gblock;
  PresentationContext        sblock;
  BackgroundImageCallbackPtr callblock;
  PresentationValue          image, value;
  char                      *url;
  char                      *bg_image;
  char                       saved;
  char                      *base;
  char                       tempname[MAX_LENGTH];
  char                       imgname[MAX_LENGTH];
  unsigned int               savedtype = 0;
  ThotBool                   moved;

  /* default element for FetchImage */
  el = TtaGetMainRoot (context->doc);
  /* move the BODY rule to the HTML element */
  moved = (context->type == HTML_EL_BODY && isHTML);
  if (moved)
    {
      if (element)
	element = el;
      else
	{
	  savedtype = context->type;
	  context->type = HTML_EL_Document;
	}
    }
  else if (element)
    el = element;

  url = NULL;
  cssRule = SkipBlanksAndComments (cssRule);
  if (!strncasecmp (cssRule, "url", 3))
    {  
      cssRule += 3;
      cssRule = SkipBlanksAndComments (cssRule);
      if (*cssRule == '(')
	{
	  cssRule++;
	  cssRule = SkipBlanksAndComments (cssRule);
	  /*** Caution: Strings can either be written with double quotes or
	    with single quotes. Only double quotes are handled here.
	    Escaped quotes are not handled. See function SkipQuotedString */
	  if (*cssRule == '"')
	    {
	      cssRule++;
	      base = cssRule;
	      while (*cssRule != EOS && *cssRule != '"')
		cssRule++;
	    }
	  else
	    {
	      base = cssRule;
	      while (*cssRule != EOS && *cssRule != ')')
		cssRule++;
	    }
	  saved = *cssRule;
	  *cssRule = EOS;
	  url = TtaStrdup (base);
	  *cssRule = saved;
	  if (saved == '"')
	    /* we need to skip two characters */
	    cssRule++;	    
	}
      cssRule++;

      if (context->destroy)
	{
	  /* remove the background image PRule */
	  image.pointer = NULL;
	  TtaSetStylePresentation (PRBackgroundPicture, element, tsch, context, image);
	  if (TtaGetStylePresentation (PRFillPattern, element, tsch, context, &value) < 0)
	    {
	      /* there is no FillPattern rule -> remove ShowBox rule */
	      value.typed_data.value = 1;
	      value.typed_data.unit = STYLE_UNIT_REL;
	      value.typed_data.real = FALSE;
	      TtaSetStylePresentation (PRShowBox, element, tsch, context, value);
	    }
	}
      else if (url)
	{
	  bg_image = TtaGetEnvString ("ENABLE_BG_IMAGES");
	  if (bg_image == NULL || !strcasecmp (bg_image, "yes"))
	    {
	      callblock = (BackgroundImageCallbackPtr) TtaGetMemory(sizeof(BackgroundImageCallbackBlock));
	      if (callblock != NULL)
		{
		  callblock->el = element;
		  callblock->tsch = tsch;
		  if (element == NULL)
		    {
		      gblock = (GenericContext) context;
		      memcpy (&callblock->context.generic, gblock,
			      sizeof (GenericContextBlock));
		    }
		  else
		    {
		      sblock = context;
		      memcpy (&callblock->context.specific, sblock,
			      sizeof(PresentationContextBlock));
		    }

		  /* check if the image url is related to an external CSS */
		  if (css != NULL && css->category == CSS_EXTERNAL_STYLE)
		    {
		      NormalizeURL (url, 0, tempname, imgname, css->url);
		      /* fetch and display background image of element */
		      FetchImage (context->doc, el, tempname, AMAYA_LOAD_IMAGE, ParseCSSBackgroundImageCallback, callblock);
		    }
		  else
		    FetchImage (context->doc, el, url, AMAYA_LOAD_IMAGE, ParseCSSBackgroundImageCallback, callblock);
		}
	    }

	  if (url)
	    TtaFreeMemory (url);
	}
    }

  /* restore the refered element */
  if (moved && !element)
    context->type = savedtype;
  return (cssRule);
}

/*----------------------------------------------------------------------
  ParseCSSBackgroundRepeat: parse a CSS BackgroundRepeat attribute string.
  ----------------------------------------------------------------------*/
static char *ParseCSSBackgroundRepeat (Element element, PSchema tsch,
				 PresentationContext context, char *cssRule, CSSInfoPtr css, ThotBool isHTML)
{
  PresentationValue   repeat;
  unsigned int        savedtype = 0;
  ThotBool            moved;

  /* move the BODY rule to the HTML element */
  moved = (context->type == HTML_EL_BODY && isHTML);
  if (moved)
    {
      if (element)
	element = TtaGetMainRoot (context->doc);
      else
	{
	  savedtype = context->type;
	  context->type = HTML_EL_Document;
	}
    }

  repeat.typed_data.value = STYLE_REALSIZE;
  repeat.typed_data.unit = STYLE_UNIT_REL;
  repeat.typed_data.real = FALSE;
  cssRule = SkipBlanksAndComments (cssRule);
  if (!strncasecmp (cssRule, "no-repeat", 9))
    repeat.typed_data.value = STYLE_REALSIZE;
  else if (!strncasecmp (cssRule, "repeat-y", 8))
    repeat.typed_data.value = STYLE_VREPEAT;
  else if (!strncasecmp (cssRule, "repeat-x", 8))
    repeat.typed_data.value = STYLE_HREPEAT;
  else if (!strncasecmp (cssRule, "repeat", 6))
    repeat.typed_data.value = STYLE_REPEAT;
  else
    return (cssRule);

   /* install the new presentation */
  TtaSetStylePresentation (PRPictureMode, element, tsch, context, repeat);
  cssRule = SkipWord (cssRule);

  /* restore the refered element */
  if (moved && !element)
    context->type = savedtype;
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBackgroundAttachment: parse a CSS BackgroundAttachment
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBackgroundAttachment (Element element, PSchema tsch,
					   PresentationContext context,
					   char *cssRule, CSSInfoPtr css,
					   ThotBool isHTML)
{
  unsigned int          savedtype = 0;
  ThotBool              moved;

  /* move the BODY rule to the HTML element */
  moved = (context->type == HTML_EL_BODY && isHTML);
  if (moved)
    {
      if (element)
	element = TtaGetMainRoot (context->doc);
      else
	{
	  savedtype = context->type;
	  context->type = HTML_EL_Document;
	}
    }

   cssRule = SkipBlanksAndComments (cssRule);
   if (!strncasecmp (cssRule, "scroll", 6))
     cssRule = SkipWord (cssRule);
   else if (!strncasecmp (cssRule, "fixed", 5))
     cssRule = SkipWord (cssRule);

  /* restore the refered element */
  if (moved && !element)
    context->type = savedtype;
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBackgroundPosition: parse a CSS BackgroundPosition
   attribute string.                                          
  ----------------------------------------------------------------------*/
static char *ParseCSSBackgroundPosition (Element element, PSchema tsch,
					 PresentationContext context,
					 char *cssRule, CSSInfoPtr css,
					 ThotBool isHTML)
{
  PresentationValue     repeat;
  unsigned int          savedtype = 0;
  ThotBool              moved;
  ThotBool              ok;

  /* move the BODY rule to the HTML element */
  moved = (context->type == HTML_EL_BODY && isHTML);
  if (moved)
    {
      if (element)
	element = TtaGetMainRoot (context->doc);
      else
	{
	  savedtype = context->type;
	  context->type = HTML_EL_Document;
	}
    }

   cssRule = SkipBlanksAndComments (cssRule);
   ok = TRUE;
   if (!strncasecmp (cssRule, "left", 4))
     cssRule = SkipWord (cssRule);
   else if (!strncasecmp (cssRule, "right", 5))
     cssRule = SkipWord (cssRule);
   else if (!strncasecmp (cssRule, "center", 6))
     cssRule = SkipWord (cssRule);
   else if (!strncasecmp (cssRule, "top", 3))
     cssRule = SkipWord (cssRule);
   else if (!strncasecmp (cssRule, "bottom", 6))
     cssRule = SkipWord (cssRule);
   else if (isdigit (*cssRule))
     cssRule = SkipWord (cssRule);
   else
     ok = FALSE;

   if (ok)
     {
       /* force realsize for the background image */
       repeat.typed_data.value = STYLE_REALSIZE;
       repeat.typed_data.unit = STYLE_UNIT_REL;
       repeat.typed_data.real = FALSE;
       TtaSetStylePresentation (PRPictureMode, element, tsch, context, repeat);
     }

  /* restore the refered element */
  if (moved && !element)
    context->type = savedtype;
   return (cssRule);
}

/*----------------------------------------------------------------------
   ParseCSSBackground: parse a CSS background attribute 
  ----------------------------------------------------------------------*/
static char *ParseCSSBackground (Element element, PSchema tsch,
				 PresentationContext context, char *cssRule,
				 CSSInfoPtr css, ThotBool isHTML)
{
  char     *ptr;

  cssRule = SkipBlanksAndComments (cssRule);
  while (*cssRule != ';' && *cssRule != EOS && *cssRule != ',')
    {
      /* perhaps a Background Image */
      if (!strncasecmp (cssRule, "url", 3))
         cssRule = ParseCSSBackgroundImage (element, tsch, context, cssRule,
					    css, isHTML);
      /* perhaps a Background Attachment */
      else if (!strncasecmp (cssRule, "scroll", 6) ||
               !strncasecmp (cssRule, "fixed", 5))
	cssRule = ParseCSSBackgroundAttachment (element, tsch, context,
						cssRule, css, isHTML);
      /* perhaps a Background Repeat */
      else if (!strncasecmp (cssRule, "no-repeat", 9) ||
               !strncasecmp (cssRule, "repeat-y", 8)  ||
               !strncasecmp (cssRule, "repeat-x", 8)  ||
               !strncasecmp (cssRule, "repeat", 6))
	cssRule = ParseCSSBackgroundRepeat (element, tsch, context,
					    cssRule, css, isHTML);
      /* perhaps a Background Position */
      else if (!strncasecmp (cssRule, "left", 4)   ||
               !strncasecmp (cssRule, "right", 5)  ||
               !strncasecmp (cssRule, "center", 6) ||
               !strncasecmp (cssRule, "top", 3)    ||
               !strncasecmp (cssRule, "bottom", 6) ||
               isdigit (*cssRule))
           cssRule = ParseCSSBackgroundPosition (element, tsch, context,
						 cssRule, css, isHTML);
      /* perhaps a Background Color */
      else
	{
	  /* check if the rule has been found */
	  ptr = cssRule;
	  cssRule = ParseCSSBackgroundColor (element, tsch, context,
					     cssRule, css, isHTML);
	  if (ptr == cssRule)
	    /* rule not found */
	    cssRule = SkipProperty (cssRule);
	}
      cssRule = SkipBlanksAndComments (cssRule);
    }
   return (cssRule);
}

/*----------------------------------------------------------------------
 ParseCSSPageBreakBefore: parse a CSS page-break-before attribute 
  ----------------------------------------------------------------------*/
static char *ParseCSSPageBreakBefore (Element element, PSchema tsch,
				      PresentationContext context, char *cssRule,
				      CSSInfoPtr css, ThotBool isHTML)
{
  PresentationValue   page;

  page.typed_data.unit = STYLE_UNIT_INVALID;
  page.typed_data.real = FALSE;
  cssRule = SkipBlanksAndComments (cssRule);
  if (!strncasecmp (cssRule, "auto", 4))
    {
      /*page.typed_data.unit = STYLE_UNIT_REL;*/
      page.typed_data.value = STYLE_AUTO;
    }
  else if (!strncasecmp (cssRule, "always", 6))
    {
      page.typed_data.unit = STYLE_UNIT_REL;
      page.typed_data.value = STYLE_ALWAYS;
    }
  else if (!strncasecmp (cssRule, "avoid", 5))
    {
      page.typed_data.unit = STYLE_UNIT_REL;
      page.typed_data.value = STYLE_AVOID;
    }
  else if (!strncasecmp (cssRule, "left", 4))
    {
      page.typed_data.unit = STYLE_UNIT_REL;
      page.typed_data.value = STYLE_PAGELEFT;
    }
  else if (!strncasecmp (cssRule, "right", 5))
    {
      page.typed_data.unit = STYLE_UNIT_REL;
      page.typed_data.value = STYLE_PAGERIGHT;
    }
  else if (!strncasecmp (cssRule, "inherit", 7))
    {
      /*page.typed_data.unit = STYLE_UNIT_REL;*/
      page.typed_data.value = STYLE_INHERIT;
    }
  cssRule = SkipWord (cssRule);
  /* install the new presentation */
  if (page.typed_data.unit == STYLE_UNIT_REL &&
      page.typed_data.value == STYLE_ALWAYS)
    TtaSetStylePresentation (PRPageBefore, element, tsch, context, page);
  return (cssRule);
}

/*----------------------------------------------------------------------
 ParseCSSPageBreakAfter: parse a CSS page-break-after attribute 
  ----------------------------------------------------------------------*/
static char *ParseCSSPageBreakAfter (Element element, PSchema tsch,
				     PresentationContext context,
				     char *cssRule, CSSInfoPtr css,
				     ThotBool isHTML)
{
  PresentationValue   page;

  page.typed_data.unit = STYLE_UNIT_INVALID;
  page.typed_data.real = FALSE;
  cssRule = SkipBlanksAndComments (cssRule);
  if (!strncasecmp (cssRule, "auto", 4))
    {
      /*page.typed_data.unit = STYLE_UNIT_REL;*/
      page.typed_data.value = STYLE_AUTO;
    }
  else if (!strncasecmp (cssRule, "always", 6))
    {
      page.typed_data.unit = STYLE_UNIT_REL;
      page.typed_data.value = STYLE_ALWAYS;
    }
  else if (!strncasecmp (cssRule, "avoid", 5))
    {
      page.typed_data.unit = STYLE_UNIT_REL;
      page.typed_data.value = STYLE_AVOID;
    }
  else if (!strncasecmp (cssRule, "left", 4))
    {
      page.typed_data.unit = STYLE_UNIT_REL;
      page.typed_data.value = STYLE_PAGELEFT;
    }
  else if (!strncasecmp (cssRule, "right", 5))
    {
      page.typed_data.unit = STYLE_UNIT_REL;
      page.typed_data.value = STYLE_PAGERIGHT;
    }
  else if (!strncasecmp (cssRule, "inherit", 7))
    {
      /*page.typed_data.unit = STYLE_UNIT_REL;*/
      page.typed_data.value = STYLE_INHERIT;
    }
  cssRule = SkipWord (cssRule);
  /* install the new presentation */
  /*if (page.typed_data.unit == STYLE_UNIT_REL)
    TtaSetStylePresentation (PRPageAfter, element, tsch, context, page);*/
  return (cssRule);
}

/*----------------------------------------------------------------------
 ParseCSSPageBreakInside: parse a CSS page-break-inside attribute 
  ----------------------------------------------------------------------*/
static char *ParseCSSPageBreakInside (Element element, PSchema tsch,
				      PresentationContext context,
				      char *cssRule, CSSInfoPtr css,
				      ThotBool isHTML)
{
  PresentationValue   page;

  page.typed_data.unit = STYLE_UNIT_INVALID;
  page.typed_data.real = FALSE;
  cssRule = SkipBlanksAndComments (cssRule);
  if (!strncasecmp (cssRule, "auto", 4))
    {
      /*page.typed_data.unit = STYLE_UNIT_REL;*/
      page.typed_data.value = STYLE_AUTO;
    }
  else if (!strncasecmp (cssRule, "avoid", 5))
    {
      page.typed_data.unit = STYLE_UNIT_REL;
      page.typed_data.value = STYLE_AVOID;
    }
  else if (!strncasecmp (cssRule, "inherit", 7))
    {
      /*page.typed_data.unit = STYLE_UNIT_REL;*/
      page.typed_data.value = STYLE_INHERIT;
    }
  cssRule = SkipWord (cssRule);
  /* install the new presentation */
  if (page.typed_data.unit == STYLE_UNIT_REL &&
      page.typed_data.value == STYLE_AVOID)
    TtaSetStylePresentation (PRPageInside, element, tsch, context, page);
  return (cssRule);
}


/*----------------------------------------------------------------------
   ParseSVGStrokeWidth: parse a SVG stroke-width property value.                                          
  ----------------------------------------------------------------------*/
static char *ParseSVGStrokeWidth (Element element, PSchema tsch,
				  PresentationContext context, char *cssRule,
				  CSSInfoPtr css, ThotBool isHTML)
{
  PresentationValue   width;
  
  cssRule = SkipBlanksAndComments (cssRule);
  width.typed_data.value = 0;
  width.typed_data.unit = STYLE_UNIT_INVALID;
  width.typed_data.real = FALSE;
  if (isdigit (*cssRule))
     cssRule = ParseCSSUnit (cssRule, &width);
  if (width.typed_data.unit != STYLE_UNIT_INVALID)
     {
     TtaSetStylePresentation (PRLineWeight, element, tsch, context, width);
     width.typed_data.value = 1;
     width.typed_data.unit = STYLE_UNIT_REL;
     }
  return (cssRule);
}

/************************************************************************
 *									*  
 *	FUNCTIONS STYLE DECLARATIONS             			*
 *									*  
 ************************************************************************/
/*
 * NOTE: Long attribute name MUST be placed before shortened ones !
 *        e.g. "FONT-SIZE" must be placed before "FONT"
 */
static CSSProperty CSSProperties[] =
{
   {"font-family", ParseCSSFontFamily},
   {"font-style", ParseCSSFontStyle},
   {"font-variant", ParseCSSFontVariant},
   {"font-weight", ParseCSSFontWeight},
   {"font-size", ParseCSSFontSize},
   {"font", ParseCSSFont},

   {"color", ParseCSSForeground},
   {"background-color", ParseCSSBackgroundColor},
   {"background-image", ParseCSSBackgroundImage},
   {"background-repeat", ParseCSSBackgroundRepeat},
   {"background-attachment", ParseCSSBackgroundAttachment},
   {"background-position", ParseCSSBackgroundPosition},
   {"background", ParseCSSBackground},

   {"word-spacing", ParseCSSWordSpacing},
   {"letter-spacing", ParseCSSLetterSpacing},
   {"text-decoration", ParseCSSTextDecoration},
   {"vertical-align", ParseCSSVerticalAlign},
   {"text-transform", ParseCSSTextTransform},
   {"text-align", ParseCSSTextAlign},
   {"text-indent", ParseCSSTextIndent},
   {"line-height", ParseCSSLineSpacing},

   {"margin-top", ParseCSSMarginTop},
   {"margin-right", ParseCSSMarginRight},
   {"margin-bottom", ParseCSSMarginBottom},
   {"margin-left", ParseCSSMarginLeft},
   {"margin", ParseCSSMargin},

   {"padding-top", ParseCSSPaddingTop},
   {"padding-right", ParseCSSPaddingRight},
   {"padding-bottom", ParseCSSPaddingBottom},
   {"padding-left", ParseCSSPaddingLeft},
   {"padding", ParseCSSPadding},

   {"border-top-width", ParseCSSBorderTopWidth},
   {"border-right-width", ParseCSSBorderRightWidth},
   {"border-bottom-width", ParseCSSBorderBottomWidth},
   {"border-left-width", ParseCSSBorderLeftWidth},
   {"border-width", ParseCSSBorderWidth},
   {"border-top-color", ParseCSSBorderColorTop},
   {"border-right-color", ParseCSSBorderColorRight},
   {"border-bottom-color", ParseCSSBorderColorBottom},
   {"border-left-color", ParseCSSBorderColorLeft},
   {"border-color", ParseCSSBorderColor},
   {"border-top-style", ParseCSSBorderStyleTop},
   {"border-right-style", ParseCSSBorderStyleRight},
   {"border-bottom-style", ParseCSSBorderStyleBottom},
   {"border-left-style", ParseCSSBorderStyleLeft},
   {"border-style", ParseCSSBorderStyle},
   {"border-top", ParseCSSBorderTop},
   {"border-right", ParseCSSBorderRight},
   {"border-bottom", ParseCSSBorderBottom},
   {"border-left", ParseCSSBorderLeft},
   {"border", ParseCSSBorder},

   {"width", ParseCSSWidth},
   {"height", ParseCSSHeight},
   {"float", ParseCSSFloat},
   {"clear", ParseCSSClear},

   {"display", ParseCSSDisplay},
   {"white-space", ParseCSSWhiteSpace},

   {"list-style-type", ParseCSSListStyleType},
   {"list-style-image", ParseCSSListStyleImage},
   {"list-style-position", ParseCSSListStylePosition},
   {"list-style", ParseCSSListStyle},

   {"page-break-before", ParseCSSPageBreakBefore},
   {"page-break-after", ParseCSSPageBreakAfter},
   {"page-break-inside", ParseCSSPageBreakInside},

   /* SVG extensions */
   {"stroke-width", ParseSVGStrokeWidth},
   {"stroke", ParseSVGStroke},
   {"fill", ParseSVGFill}
};
#define NB_CSSSTYLEATTRIBUTE (sizeof(CSSProperties) / sizeof(CSSProperty))

/*----------------------------------------------------------------------
   ParseCSSRule: parse a CSS Style string                        
   we expect the input string describing the style to be of the  
   form: PRORPERTY: DESCRIPTION [ ; PROPERTY: DESCRIPTION ] * 
   but tolerate incorrect or incomplete input                    
  ----------------------------------------------------------------------*/
static void  ParseCSSRule (Element element, PSchema tsch,
			   PresentationContext context, char *cssRule,
			   CSSInfoPtr css, ThotBool isHTML)
{
  DisplayMode         dispMode;
  char               *p = NULL;
  int                 lg;
  unsigned int        i;
  ThotBool            found;

  /* avoid too many redisplay */
  dispMode = TtaGetDisplayMode (context->doc);
  if (dispMode == DisplayImmediately)
    TtaSetDisplayMode (context->doc, DeferredDisplay);

  while (*cssRule != EOS)
    {
      cssRule = SkipBlanksAndComments (cssRule);
      
      found = FALSE;
      /* look for the type of property */
      for (i = 0; i < NB_CSSSTYLEATTRIBUTE && !found; i++)
	{
	  lg = strlen (CSSProperties[i].name);
	  if (!strncasecmp (cssRule, CSSProperties[i].name, lg))
	    {
	      cssRule += lg;
	      found = TRUE;
	      i--;
	    }
	}

      if (i == NB_CSSSTYLEATTRIBUTE)
	cssRule = SkipProperty (cssRule);
      else
	{
	  /* update index and skip the ":" indicator if present */
	  cssRule = SkipBlanksAndComments (cssRule);
	  if (*cssRule == ':')
	    {
	      cssRule++;
	      cssRule = SkipBlanksAndComments (cssRule);
	      /* try to parse the value associated with this property */
	      if (CSSProperties[i].parsing_function != NULL)
		{
		  p = CSSProperties[i].parsing_function (element, tsch, context,
							 cssRule, css, isHTML);
		  /* update index and skip the ";" separator if present */
		  cssRule = p;
		}
	    }
	  else
	    cssRule = SkipProperty (cssRule);
	}
      /* next property */
      cssRule = SkipBlanksAndComments (cssRule);
      if (*cssRule == ',' || *cssRule == ';')
	{
	  cssRule++;
	  cssRule = SkipBlanksAndComments (cssRule);
	}
    }

  /* restore the display mode */
  if (dispMode == DisplayImmediately)
    TtaSetDisplayMode (context->doc, dispMode);
}


/*----------------------------------------------------------------------
 PToCss:  translate a PresentationSetting to the
     equivalent CSS string, and add it to the buffer given as the
     argument. It is used when extracting the CSS string from actual
     presentation.
     el is the element for which the style rule is generated
 
  All the possible values returned by the presentation drivers are
  described in thotlib/include/presentation.h
 -----------------------------------------------------------------------*/
void PToCss (PresentationSetting settings, char *buffer, int len, Element el)
{
  ElementType         elType;
  float               fval = 0;
  unsigned short      red, green, blue;
  int                 add_unit = 0;
  unsigned int        unit, i;
  ThotBool            real = FALSE;

  buffer[0] = EOS;
  if (len < 40)
    return;

  unit = settings->value.typed_data.unit;
  if (settings->value.typed_data.real)
    {
      real = TRUE;
      fval = (float) settings->value.typed_data.value;
      fval /= 1000;
    }

  switch (settings->type)
    {
    case PRVisibility:
      break;
    case PRFont:
      switch (settings->value.typed_data.value)
	{
	case STYLE_FONT_HELVETICA:
	  strcpy (buffer, "font-family: helvetica");
	  break;
	case STYLE_FONT_TIMES:
	  strcpy (buffer, "font-family: times");
	  break;
	case STYLE_FONT_COURIER:
	  strcpy (buffer, "font-family: courier");
	  break;
	}
      break;
    case PRStyle:
      switch (settings->value.typed_data.value)
	{
	case STYLE_FONT_ROMAN:
	  strcpy (buffer, "font-style: normal");
	  break;
	case STYLE_FONT_ITALICS:
	  strcpy (buffer, "font-style: italic");
	  break;
	case STYLE_FONT_OBLIQUE:
	  strcpy (buffer, "font-style: oblique");
	  break;
	}
      break;
    case PRWeight:
      switch (settings->value.typed_data.value)
	{
	case STYLE_WEIGHT_BOLD:
	  strcpy (buffer, "font-weight: bold");
	  break;
	case STYLE_WEIGHT_NORMAL:
	  strcpy (buffer, "font-weight: normal");
	  break;
	}
      break;
    case PRSize:
      if (unit == STYLE_UNIT_REL)
	{
	  if (real)
	    {
	      sprintf (buffer, "font-size: %g", fval);
	      add_unit = 1;
	    }
	  else
	    switch (settings->value.typed_data.value)
	      {
	      case 1:
		strcpy (buffer, "font-size: xx-small");
		break;
	      case 2:
		strcpy (buffer, "font-size: x-small");
		break;
	      case 3:
		strcpy (buffer, "font-size: small");
		break;
	      case 4:
		strcpy (buffer, "font-size: medium");
		break;
	      case 5:
		strcpy (buffer, "font-size: large");
		break;
	      case 6:
		strcpy (buffer, "font-size: x-large");
		break;
	      case 7:
	      case 8:
	      case 9:
	      case 10:
	      case 11:
	      case 12:
		strcpy (buffer, "font-size: xx-large");
		break;
	      }
	}
      else
	{
	  if (real)
	    sprintf (buffer, "font-size: %g", fval);
	  else
	    sprintf (buffer, "font-size: %d",
		      settings->value.typed_data.value);
	  add_unit = 1;
	}
      break;
    case PRUnderline:
      switch (settings->value.typed_data.value)
	{
	case STYLE_UNDERLINE:
	  strcpy (buffer, "text-decoration: underline");
	  break;
	case STYLE_OVERLINE:
	  strcpy (buffer, "text-decoration: overline");
	  break;
	case STYLE_CROSSOUT:
	  strcpy (buffer, "text-decoration: line-through");
	  break;
	}
      break;
    case PRIndent:
      if (real)
	sprintf (buffer, "text-indent: %g", fval);
      else
	sprintf (buffer, "text-indent: %d",
		  settings->value.typed_data.value);
      add_unit = 1;
      break;
    case PRLineSpacing:
      if (real)
	sprintf (buffer, "line-height: %g", fval);
      else
	sprintf (buffer, "line-height: %d",
		  settings->value.typed_data.value);
      add_unit = 1;
      break;
    case PRAdjust:
      switch (settings->value.typed_data.value)
	{
	case STYLE_ADJUSTLEFT:
	  strcpy (buffer, "text-align: left");
	  break;
	case STYLE_ADJUSTRIGHT:
	  strcpy (buffer, "text-align: right");
	  break;
	case STYLE_ADJUSTCENTERED:
	  strcpy (buffer, "text-align: center");
	  break;
	case STYLE_ADJUSTLEFTWITHDOTS:
	  strcpy (buffer, "text-align: left");
	  break;
        case STYLE_ADJUSTJUSTIFY:
	  strcpy (buffer, "text-align: justify");
	  break;
	}
      break;
    case PRHyphenate:
      break;
    case PRFillPattern:
      break;
    case PRBackground:
      TtaGiveThotRGB (settings->value.typed_data.value, &red, &green, &blue);
      elType = TtaGetElementType(el);
#ifdef GRAPHML
      if (strcmp(TtaGetSSchemaName (elType.ElSSchema), "GraphML") == 0)
	sprintf (buffer, "fill: #%02X%02X%02X", red, green, blue);
      else
#endif /* GRAPHML */
         sprintf (buffer, "background-color: #%02X%02X%02X", red, green,
		   blue);
      break;
    case PRForeground:
      TtaGiveThotRGB (settings->value.typed_data.value, &red, &green, &blue);
      elType = TtaGetElementType(el);
#ifdef GRAPHML
      if (strcmp(TtaGetSSchemaName (elType.ElSSchema), "GraphML") == 0)
	sprintf (buffer, "stroke: #%02X%02X%02X", red, green, blue);
      else
#endif /* GRAPHML */
	sprintf (buffer, "color: #%02X%02X%02X", red, green, blue);
      break;
    case PRLineWeight:
      elType = TtaGetElementType(el);
#ifdef GRAPHML
      if (!strcmp(TtaGetSSchemaName (elType.ElSSchema), "GraphML"))
#endif /* GRAPHML */
	{
	  if (real)
	    sprintf (buffer, "stroke-width: %g", fval);
	  else
	    sprintf (buffer, "stroke-width: %d",
		      settings->value.typed_data.value);
	}
      add_unit = 1;
      break;

    case PRMarginTop:
      if (real)
	sprintf (buffer, "marging-top: %g", fval);
      else
	sprintf (buffer, "marging-top: %d",
		  settings->value.typed_data.value);
      add_unit = 1;
      break;
    case PRMarginLeft:
      if (real)
	sprintf (buffer, "margin-left: %g", fval);
      else
	sprintf (buffer, "margin-left: %d",
		  settings->value.typed_data.value);
      add_unit = 1;
      break;
    case PRHeight:
      if (real)
	sprintf (buffer, "height: %g", fval);
      else
	sprintf (buffer, "height: %d", settings->value.typed_data.value);
      add_unit = 1;
      break;
    case PRWidth:
      if (real)
	sprintf (buffer, "width: %g", fval);
      else
	sprintf (buffer, "width: %d", settings->value.typed_data.value);
      add_unit = 1;
      break;
    case PRLine:
      if (settings->value.typed_data.value == STYLE_INLINE)
	strcpy (buffer, "display: inline");
      else if (settings->value.typed_data.value == STYLE_NOTINLINE)
	strcpy (buffer, "display: block");
      break;
    case PRBackgroundPicture:
      if (settings->value.pointer != NULL)
	sprintf (buffer, "background-image: url(%s)",
		  (char*)(settings->value.pointer));
      else
	sprintf (buffer, "background-image: none");
      break;
    case PRPictureMode:
      switch (settings->value.typed_data.value)
	{
	case STYLE_REALSIZE:
	  sprintf (buffer, "background-repeat: no-repeat");
	  break;
	case STYLE_REPEAT:
	  sprintf (buffer, "background-repeat: repeat");
	  break;
	case STYLE_VREPEAT:
	  sprintf (buffer, "background-repeat: repeat-y");
	  break;
	case STYLE_HREPEAT:
	  sprintf (buffer, "background-repeat: repeat-x");
	  break;
	}
      break;
    default:
      break;
    }

  if (add_unit)
    {
      /* add the unit string to the CSS string */
      for (i = 0; i < NB_UNITS; i++)
	{
	  if (CSSUnitNames[i].unit == unit)
	    {
	      strcat (buffer, CSSUnitNames[i].sign);
	      break;
	    }
	}
    }
}

/*----------------------------------------------------------------------
   ParseHTMLSpecificStyle: parse and apply a CSS Style string.
   This function must be called when a specific style is applied to an
   element.
   The parameter isCSS is 1 when the specific presentation should be
   translated into a CSS rule, 0 if it should be translated into a
   presentation attribute.
  ----------------------------------------------------------------------*/
void  ParseHTMLSpecificStyle (Element el, char *cssRule, Document doc,
			      int isCSS, ThotBool destroy)
{
   PresentationContext context;
   ElementType         elType;
   ThotBool            isHTML;

   /*  A rule applying to BODY is really meant to address HTML */
   elType = TtaGetElementType (el);
   isHTML = (strcmp (TtaGetSSchemaName (elType.ElSSchema), "HTML") == 0);
   /* create the context of the Specific presentation driver */
   context = TtaGetSpecificStyleContext (doc);
   if (context == NULL)
     return;
   context->type = elType.ElTypeNum;
   context->cssLevel = isCSS;
   context->destroy = destroy;
   /* Call the parser */
   ParseCSSRule (el, NULL, (PresentationContext) context, cssRule, NULL, isHTML);
   /* free the context */
   TtaFreeMemory(context);
}


/*----------------------------------------------------------------------
   ParseGenericSelector: Create a generic context for a given 
   selector string. If the selector is made of multiple comma- 
   separated selector items, it parses them one at a time and  
   return the end of the selector string to be handled or NULL 
  ----------------------------------------------------------------------*/
static char *ParseGenericSelector (char *selector, char *cssRule,
				   GenericContext ctxt, Document doc,
				   CSSInfoPtr css)
{
  ElementType        elType;
  PSchema            tsch;
  AttributeType      attrType;
  char               sel[MAX_ANCESTORS * 50];
  char              *deb, *cur;
  char              *structName;
  char              *names[MAX_ANCESTORS];
  char              *ids[MAX_ANCESTORS];
  char              *classes[MAX_ANCESTORS];
  char              *pseudoclasses[MAX_ANCESTORS];
  char              *attrs[MAX_ANCESTORS];
  char              *attrvals[MAX_ANCESTORS];
  int                i, j, k, max, maxAttr;
  ThotBool           isHTML;
  ThotBool           level;

  sel[0] = EOS;
  for (i = 0; i < MAX_ANCESTORS; i++)
    {
      names[i] = NULL;
      ids[i] = NULL;
      classes[i] = NULL;
      pseudoclasses[i] = NULL;
      attrs[i] = NULL;
      attrvals[i] = NULL;

      ctxt->name[i] = 0;
      ctxt->names_nb[i] = 0;
      ctxt->attrType[i] = 0;
      ctxt->attrText[i] = NULL;
    }
  ctxt->box = 0;
  ctxt->type = 0;
  /* the priority level of the rule depends on the selector */
  ctxt->cssLevel = 0;
  
  selector = SkipBlanksAndComments (selector);
  cur = &sel[0];
  max = 0; /* number of loops */
  while (1)
    {
      /* point to the following word in sel[] */
      deb = cur;
      /* copy an item of the selector into sel[] */
      /* put one word in the sel buffer */
      while (*selector != EOS && *selector != ',' &&
             *selector != '.' && *selector != ':' &&
             *selector != '#' && !TtaIsBlank (selector))
            *cur++ = *selector++;
      *cur++ = EOS; /* close the first string  in sel[] */
      if (deb[0] != EOS)
	names[0] = deb;
      else
	names[0] = NULL;
      classes[0] = NULL;
      pseudoclasses[0] = NULL;
      ids[0] = NULL;
      attrs[0] = NULL;
      attrvals[0] = NULL;

      /* now names[0] points to the beginning of the parsed item
	 and cur to the next chain to be parsed */
      if (*selector == ':' || *selector == '.' || *selector == '#')
	/* point to the following word in sel[] */
	deb = cur;

      if (*selector == '.')
	{
	  selector++;
	  while (*selector != EOS && *selector != ',' &&
		 *selector != '.' && *selector != ':' &&
		 !TtaIsBlank (selector))
	    *cur++ = *selector++;
	  /* point to the class in sel[] if it's valid name */
	  if (deb[0] > 64)
	    classes[0] = deb;
	  /* close the word */
	  *cur++ = EOS;
	}
      else if (*selector == ':')
	{
	  selector++;
	  while (*selector != EOS && *selector != ',' &&
             *selector != '.' && *selector != ':' &&
             !TtaIsBlank (selector))
            *cur++ = *selector++;
	  /* point to the pseudoclass in sel[] if it's valid name */
	  if (deb[0] > 64)
	    pseudoclasses[0]= deb;
	  /* close the word */
	  *cur++ = EOS;
	}
      else if (*selector == '#')
	{
	  selector++;
	  while (*selector != EOS && *selector != ',' &&
             *selector != '.' && *selector != ':' &&
             !TtaIsBlank (selector))
            *cur++ = *selector++;
	  /* point to the attribute in sel[] if it's valid name */
	  if (deb[0] > 64)
	    ids[0] = deb;
	  /* close the word */
	  *cur++ = EOS;
	}
      else if (*selector == '[')
	{
	  selector++;
	  while (*selector != EOS && *selector != ']' &&
		 *selector != '=' && *selector != '~')
	    *cur++ = *selector++;
	  /* point to the attribute in sel[] if it's valid name */
	  if (deb[0] > 64)
	    attrs[0] = deb;
	  /* close the word */
	      *cur++ = EOS;
	  if (*selector == '=')
	    {
	      /* look for a value "xxxx" */
	      while (*selector != EOS && *selector != ']' && *selector != '"')
		*cur++ = *selector++;
	      /* there is a value */
	      if (*selector != EOS)
		{
		  /* we are now parsing the attribute value */
		  attrvals[0] = cur;
		  selector++;
		  while (*selector != EOS && *selector != '"')
		    *cur++ = *selector++;
		  if (*selector != EOS)
		    selector++;
		}
	    }
	  *cur++ = EOS;
	}

      selector = SkipBlanksAndComments (selector);
      /* is it a multi-level selector? */
      if (*selector == EOS)
	/* end of the selector */
	break;
      else if (*selector == ',')
	{
	  /* end of the current selector */
	  selector++;
	  break;
	}
      else
	{
	  /* shifts the list to make room for the new name */
	  max++; /* a new level in ancestor tables */
	  if (max == MAX_ANCESTORS)
	    /* abort the CSS parsing */
	    return (selector);
	  for (i = max; i > 0; i--)
	    {
	      names[i] = names[i - 1];
	      ids[i] = ids[i - 1];
	      classes[i] = classes[i - 1];
	      attrs[i] = attrs[i - 1];
	      attrvals[i] = attrvals[i - 1];
	      pseudoclasses[i] = pseudoclasses[i - 1];
	    }
	}
    }

  /* Now set up the context block */
  i = 0;
  k = 0;
  j = 0;
  maxAttr = 0;
  while (i <= max)
    {
      if (names[i])
	{
	  /* get the new element type of this name */
	  GIType (names[i], &elType, doc);
	  if (i == 0)
	    {
	      /* Store the element type */
	      ctxt->type = elType.ElTypeNum;
	      ctxt->name[0] = elType.ElTypeNum;
	      ctxt->names_nb[0] = 0;
	      ctxt->schema = elType.ElSSchema;
	      k++;
	    }
	  else if (elType.ElTypeNum != 0)
	    {
	      /* look at the current context to see if the type is already
		 stored */
	      j = 0;
	      while (j < k && ctxt->name[j] != elType.ElTypeNum)
		j++;
	      if (j == k)
		{
		  /* add a new entry */
		  k++;
		  ctxt->name[j] = elType.ElTypeNum;
		  if (j != 0)
		  ctxt->names_nb[j] = 1;
		}
	      else
		/* increment the number of ancestor levels */
		ctxt->names_nb[j]++;
	    }
	  else
	    {
	      /* add a new entry */
	      j = k;
	      k++;
	    }
	}

      /* store attributes information */
      if (classes[i])
	{
	  ctxt->attrText[j] = classes[i];
	  ctxt->attrType[j] = HTML_ATTR_Class;
	  /* add a new entry */
	  maxAttr = i + 1;
	}
      if (pseudoclasses[i])
	{
	  ctxt->attrText[j] = pseudoclasses[i];
	  ctxt->attrType[j] = HTML_ATTR_PseudoClass;
	  /* add a new entry */
	  maxAttr = i + 1;
	}
      if (ids[i])
	{
	  ctxt->attrText[j] = ids[i];
	  ctxt->attrType[j] = HTML_ATTR_ID;
	  /* add a new entry */
	  maxAttr = i + 1;
	}
      if (attrs[i])
	{
	  MapHTMLAttribute (attrs[i], &attrType, names[i], &level, doc);
	  ctxt->attrText[j] = attrvals[i];
	  ctxt->attrType[j] = attrType.AttrTypeNum;
	  maxAttr = i + 1;
	}
      i++;
    }

  /* sort the list of ancestors by name order */
  max = k;
  i = 1;
  while (i < max)
    {
      for (k = i + 1; k < max; k++)
	if (ctxt->name[i] > ctxt->name[k])
	  {
	    j = ctxt->name[i];
	    ctxt->name[i] = ctxt->name[k];
	    ctxt->name[k] = j;
	    j = ctxt->names_nb[i];
	    ctxt->names_nb[i] = ctxt->names_nb[k];
	    ctxt->names_nb[k] = j;
	    j = ctxt->attrType[i];
	    ctxt->attrType[i] = ctxt->attrType[k];
	    ctxt->attrType[k] = j;
	    cur = ctxt->attrText[i];
	    ctxt->attrText[i] = ctxt->attrText[k];
	    ctxt->attrText[k] = cur;
	  }
      i++;
    }

  /* Get the schema name of the main element */
  if (ctxt->schema == NULL)
    ctxt->schema = TtaGetDocumentSSchema (doc);
  isHTML = (strcmp (TtaGetSSchemaName (ctxt->schema), "HTML") == 0);
  tsch = GetPExtension (doc, ctxt->schema, css);
  structName = TtaGetSSchemaName (ctxt->schema);
  if (cssRule)
    ParseCSSRule (NULL, tsch, (PresentationContext) ctxt, cssRule, css, isHTML);
  return (selector);
}

/*----------------------------------------------------------------------
   ParseStyleDeclaration: parse a style declaration    
   stored in the style element of a document                       
   We expect the style string to be of the form:                   
   [                                                                
   e.g: pinky, awful { color: pink, font-family: helvetica }        
  ----------------------------------------------------------------------*/
static void  ParseStyleDeclaration (Element el, char *cssRule, Document doc,
				    CSSInfoPtr css, ThotBool destroy)
{
  GenericContext      ctxt;
  char               *decl_end;
  char               *sel_end;
  char               *selector;
  char                saved1;
  char                saved2;

  /* separate the selectors string */
  cssRule = SkipBlanksAndComments (cssRule);
  decl_end = cssRule;
  while (*decl_end != EOS && *decl_end != '{')
    decl_end++;
  if (*decl_end == EOS)
    return;
  /* verify and clean the selector string */
  sel_end = decl_end - 1;
  while (*sel_end == SPACE || *sel_end == BSPACE ||
	 *sel_end == EOL || *sel_end == CR)
    sel_end--;
  sel_end++;
  saved1 = *sel_end;
  *sel_end = EOS;
  selector = cssRule;

  /* now, deal with the content ... */
  decl_end++;
  cssRule = decl_end;
  while (*decl_end != EOS && *decl_end != '}')
    decl_end++;
  if (*decl_end == EOS)
    {
      fprintf (stderr, "Invalid STYLE declaration: %s\n", cssRule);
      return;
    }
  saved2 = *decl_end;
  *decl_end = EOS;

  /*
   * parse the style attribute string and install the corresponding
   * presentation attributes on the new element
   */
  ctxt = TtaGetGenericStyleContext (doc);
  if (ctxt == NULL)
    return;
  ctxt->destroy = destroy;

  while ((selector != NULL) && (*selector != EOS))
    selector = ParseGenericSelector (selector, cssRule, ctxt, doc, css);
  TtaFreeMemory (ctxt);

  /* restore the string to its original form ! */
  *sel_end = saved1;
  *decl_end = saved2;
}

/************************************************************************
 *									*  
 *	EVALUATION FUNCTIONS / CASCADING AND OVERLOADING		*
 *									*  
 ************************************************************************/

/*----------------------------------------------------------------------
   IsImplicitClassName: return wether the Class name is an        
   implicit one, eg "H1" or "H2 EM" meaning it's a GI name       
   or an HTML context name.                                      
  ----------------------------------------------------------------------*/
int         IsImplicitClassName (char *class, Document doc)
{
   char         name[200];
   char        *cur = name;
   char        *first; 
   char         save;
   SSchema      schema;

   /* make a local copy */
   strncpy (name, class, 199);
   name[199] = 0;

   /* loop looking if each word is a GI */
   while (*cur != 0)
     {
	first = cur;
	cur = SkipWord (cur);
	save = *cur;
	*cur = 0;
	schema = NULL;
	if (MapGI (first, &schema, doc) == -1)
	  {
	     return (0);
	  }
	*cur = save;
	cur = SkipBlanksAndComments (cur);
     }
   return (1);
}

/************************************************************************
 *									*  
 *  Functions Needed for support of HTML 3.2: translate to CSS equiv   *
 *									*  
 ************************************************************************/

/*----------------------------------------------------------------------
   HTMLSetBackgroundColor:
  ----------------------------------------------------------------------*/
void    HTMLSetBackgroundColor (Document doc, Element el, char *color)
{
   char             css_command[100];

   sprintf (css_command, "background-color: %s", color);
   ParseHTMLSpecificStyle (el, css_command, doc, 1, FALSE);
}

/*----------------------------------------------------------------------
   HTMLSetBackgroundImage:
   repeat = repeat value
   image = url of background image
  ----------------------------------------------------------------------*/
void HTMLSetBackgroundImage (Document doc, Element el, int repeat, char *image)
{
   char           css_command[400];

   /******* check buffer overflow ********/
   sprintf (css_command, "background-image: url(%s); background-repeat: ", image);
   if (repeat == STYLE_REPEAT)
     strcat (css_command, "repeat");
   else if (repeat == STYLE_HREPEAT)
     strcat (css_command, "repeat-x");
   else if (repeat == STYLE_VREPEAT)
     strcat (css_command, "repeat-y");
   else
     strcat (css_command, "no-repeat");
   ParseHTMLSpecificStyle (el, css_command, doc, 1, FALSE);
}

/*----------------------------------------------------------------------
   HTMLSetForegroundColor:                                        
  ----------------------------------------------------------------------*/
void   HTMLSetForegroundColor (Document doc, Element el, char *color)
{
   char           css_command[100];

   sprintf (css_command, "color: %s", color);
   ParseHTMLSpecificStyle (el, css_command, doc, 1, FALSE);
}

/*----------------------------------------------------------------------
   HTMLResetBackgroundColor:                                      
  ----------------------------------------------------------------------*/
void                HTMLResetBackgroundColor (Document doc, Element el)
{
   char           css_command[100];

   sprintf (css_command, "background: red");
   ParseHTMLSpecificStyle (el, css_command, doc, 1, TRUE);
}

/*----------------------------------------------------------------------
   HTMLResetBackgroundImage:                                      
  ----------------------------------------------------------------------*/
void                HTMLResetBackgroundImage (Document doc, Element el)
{
   char           css_command[1000];

   sprintf (css_command, "background-image: url(xx); background-repeat: repeat");
   ParseHTMLSpecificStyle (el, css_command, doc, 1, TRUE);
}

/*----------------------------------------------------------------------
   HTMLResetForegroundColor:                                      
  ----------------------------------------------------------------------*/
void                HTMLResetForegroundColor (Document doc, Element el)
{
   char           css_command[100];

   /* it's not necessary to well know the current color but it must be valid */
   sprintf (css_command, "color: red");
   ParseHTMLSpecificStyle (el, css_command, doc, 1, TRUE);
}

/*----------------------------------------------------------------------
   HTMLSetAlinkColor:                                             
  ----------------------------------------------------------------------*/
void                HTMLSetAlinkColor (Document doc, char *color)
{
   char           css_command[100];

   sprintf (css_command, "a:link { color: %s }", color);
   ApplyCSSRules (NULL, css_command, doc, FALSE);
}

/*----------------------------------------------------------------------
   HTMLSetAactiveColor:                                           
  ----------------------------------------------------------------------*/
void                HTMLSetAactiveColor (Document doc, char *color)
{
   char           css_command[100];

   sprintf (css_command, "a:active { color: %s }", color);
   ApplyCSSRules (NULL, css_command, doc, FALSE);
}

/*----------------------------------------------------------------------
   HTMLSetAvisitedColor:                                          
  ----------------------------------------------------------------------*/
void                HTMLSetAvisitedColor (Document doc, char *color)
{
   char           css_command[100];

   sprintf (css_command, "a:visited { color: %s }", color);
   ApplyCSSRules (NULL, css_command, doc, FALSE);
}

/*----------------------------------------------------------------------
   HTMLResetAlinkColor:                                           
  ----------------------------------------------------------------------*/
void                HTMLResetAlinkColor (Document doc)
{
   char           css_command[100];

   sprintf (css_command, "a:link { color: red }");
   ApplyCSSRules (NULL, css_command, doc, TRUE);
}

/*----------------------------------------------------------------------
   HTMLResetAactiveColor:                                                 
  ----------------------------------------------------------------------*/
void                HTMLResetAactiveColor (Document doc)
{
   char           css_command[100];

   sprintf (css_command, "a:active { color: red }");
   ApplyCSSRules (NULL, css_command, doc, TRUE);
}

/*----------------------------------------------------------------------
   HTMLResetAvisitedColor:                                        
  ----------------------------------------------------------------------*/
void                HTMLResetAvisitedColor (Document doc)
{
   char           css_command[100];

   sprintf (css_command, "a:visited { color: red }");
   ApplyCSSRules (NULL, css_command, doc, TRUE);
}

/*----------------------------------------------------------------------
  ApplyCSSRules: parse a CSS Style description stored in the
  header of a HTML document.
  ----------------------------------------------------------------------*/
void ApplyCSSRules (Element el, char *cssRule, Document doc, ThotBool destroy)
{
  CSSInfoPtr        css;

  css = SearchCSS (doc, NULL);
  if (css == NULL)
    /* create the document css */
    css = AddCSS (doc, doc, CSS_DOCUMENT_STYLE, NULL, NULL);
  ParseStyleDeclaration (el, cssRule, doc, css, destroy); 
}

/*----------------------------------------------------------------------
   ReadCSSRules:  is the front-end function called by the HTML parser
   when detecting a <STYLE TYPE="text/css"> indicating it's the
   beginning of a CSS fragment or when reading a file .css.
  
   The CSS parser has to handle <!-- ... --> constructs used to
   prevent prehistoric browser from displaying the CSS as a text
   content. It will stop on any sequence "<x" where x is different
   from ! and will return x as to the caller. Theorically x should
   be equal to / for the </STYLE> end of style.

   The parameter doc gives the document tree that contains CSS information.
   The parameter docRef gives the document to which CSS are to be applied.
   This function uses the current css context or creates it. It's able
   to work on the given buffer or call GetNextChar to read the parsed
   file.
   Parameter withUndo indicates whether the changes made in the document
   structure and content have to be registered in the Undo queue or not
  ----------------------------------------------------------------------*/
char ReadCSSRules (Document docRef, CSSInfoPtr css, char *buffer, ThotBool withUndo)
{
  DisplayMode         dispMode;
  char                c;
  char               *cssRule, *base;
  int                 index;
  int                 CSSindex;
  int                 CSScomment;
  int                 import;
  int                 openRule;
  ThotBool            HTMLcomment;
  ThotBool            toParse, eof;
  ThotBool            ignoreMedia, media;
  ThotBool            noRule;

  CSScomment = MAX_CSS_LENGTH;
  HTMLcomment = FALSE;
  CSSindex = 0;
  toParse = FALSE;
  noRule = FALSE;
  media =  FALSE;
  ignoreMedia = FALSE;
  import = MAX_CSS_LENGTH;
  eof = FALSE;
  openRule = 0;
  c = SPACE;
  index = 0;
  /* avoid too many redisplay */
  dispMode = TtaGetDisplayMode (docRef);
  if (dispMode == DisplayImmediately)
    TtaSetDisplayMode (docRef, DeferredDisplay);

  /* look for the CSS context */
  if (css == NULL)
    css = SearchCSS (docRef, NULL);
  if (css == NULL)
    css = AddCSS (docRef, docRef, CSS_DOCUMENT_STYLE, NULL, NULL);

  while (CSSindex < MAX_CSS_LENGTH && c != EOS && !eof)
    {
      c = buffer[index++];
      eof = (c == EOS);
      CSSbuffer[CSSindex] = c;
      if (CSScomment == MAX_CSS_LENGTH ||
	  c == '*' || c == '/' || c == '<')
	{
	  /* we're not within a comment or we're parsing * or / */
	  switch (c)
	    {
	    case '@': /* perhaps an import primitive */
	      import = CSSindex;
	      break;
	    case ';':
	      if (import != MAX_CSS_LENGTH && !media)
		{ 
		  if (strncasecmp (&CSSbuffer[import+1], "import", 6))
		    /* it's not an import */
		    import = MAX_CSS_LENGTH;
		  /* save the text */
		  noRule = TRUE;
		}
	      break;
	    case '*':
	      if (CSScomment == MAX_CSS_LENGTH && CSSindex > 0 &&
		  CSSbuffer[CSSindex - 1] == '/')
		/* start a comment */
		CSScomment = CSSindex - 1;
	      break;
	    case '/':
	      if (CSSindex > 1 && CSScomment != MAX_CSS_LENGTH &&
		  CSSbuffer[CSSindex - 1] == '*')
		{
		  /* close a comment:and ignore its contents */
		  CSSindex = CSScomment - 1; /* will be incremented later */
		  CSScomment = MAX_CSS_LENGTH;
		}
	      else if (CSScomment == MAX_CSS_LENGTH && CSSindex > 0 &&
		       CSSbuffer[CSSindex - 1] ==  '<')
		{
		  /* this is the closing tag ! */
		  CSSindex -= 2; /* remove </ from the CSS string */
		  noRule = TRUE;
		} 
	      break;
	    case '<':
	      if (CSScomment == MAX_CSS_LENGTH)
		{
		  /* only if we're not parsing a comment */
		  c = buffer[index++];
		  eof = (c == EOS);
		  if (c == '!')
		    {
		      /* CSS within an HTML comment */
		      HTMLcomment = TRUE;
		      CSSindex++;
		      CSSbuffer[CSSindex] = c;
		    }
		  else if (c == EOS)
		    CSSindex++;
		}
	      break;
	    case '-':
	      if (CSSindex > 0 && CSSbuffer[CSSindex - 1] == '-' &&
		  HTMLcomment)
		/* CSS within an HTML comment */
		noRule = TRUE;
	      break;
	    case '>':
	      if (HTMLcomment)
		noRule = TRUE;
	      break;
	    case ' ':
	      if (import != MAX_CSS_LENGTH && openRule == 0)
		media = !strncmp (&CSSbuffer[import+1], "media", 5);
	      break;
	    case '{':
	      openRule++;
	      if (import != MAX_CSS_LENGTH && openRule == 1 && media)
		{
		  /* is it the screen concerned? */
		  CSSbuffer[CSSindex+1] = EOS;
		  if (TtaIsPrinting ())
		    base = strstr (&CSSbuffer[import], "print");
		  else
		    base = strstr (&CSSbuffer[import], "screen");
		  if (base == NULL)
		    ignoreMedia = TRUE;
		  noRule = TRUE;
		}
	      break;
	    case '}':
	      openRule--;
	      if (import != MAX_CSS_LENGTH && openRule == 0)
		{
		  import = MAX_CSS_LENGTH;
		  noRule = TRUE;
		  ignoreMedia = FALSE;
		  media = FALSE;
		}
	      else
		toParse = TRUE;
	      break;
	    default:
	      break;
	    }
        }
      if (c != CR)
	CSSindex++;

      if (CSSindex >= MAX_CSS_LENGTH && CSScomment < MAX_CSS_LENGTH)
	/* we're still parsing a comment: remove the text comment */
	CSSindex = CSScomment;

      if (CSSindex >= MAX_CSS_LENGTH || toParse || noRule)
	{
	  CSSbuffer[CSSindex] = EOS;
	  /* parse a not empty string */
	  if (CSSindex > 0)
	    {
              /* apply CSS rule if it's not just a saving of text */
              if (!noRule && !ignoreMedia)
		ParseStyleDeclaration (NULL, CSSbuffer, docRef, css, FALSE);
              else if (import != MAX_CSS_LENGTH &&
		       !strncasecmp (&CSSbuffer[import+1], "import", 6))
		{
		  /* import section */
		  cssRule = &CSSbuffer[import+7];
		  cssRule = TtaSkipBlanks (cssRule);
		  if (!strncasecmp (cssRule, "url", 3))
		    {
                      cssRule = &cssRule[3];
                      cssRule = TtaSkipBlanks (cssRule);
                      if (*cssRule == '(')
			{
			  cssRule++;
			  cssRule = TtaSkipBlanks (cssRule);
			  base = cssRule;
			  while (*cssRule != EOS && *cssRule != ')')
			    cssRule++;
			  *cssRule = EOS;
			  LoadStyleSheet (base, docRef, NULL, css, css->media[docRef]);
			}
		    }
		  /*
		    Caution: Strings can either be written with double quotes or
		    with single quotes. Only double quotes are handled here.
		    Escaped quotes are not handled. See function SkipQuotedString
		  */
		  else if (*cssRule == '"')
		    {
		      cssRule++;
		      base = cssRule;
		      while (*cssRule != EOS && *cssRule != '"')
			cssRule++;
		      *cssRule = EOS;
		      LoadStyleSheet (base, docRef, NULL, css, css->media[docRef]);
		    }
		  import = MAX_CSS_LENGTH;
		}
	    }
	  toParse = FALSE;
	  noRule = FALSE;
	  CSSindex = 0;
        }
    }
  /* restore the display mode */
  if (dispMode == DisplayImmediately)
    TtaSetDisplayMode (docRef, dispMode);
  return (c);
}