// swad_table.c: tables

/*
    SWAD (Shared Workspace At a Distance),
    is a web platform developed at the University of Granada (Spain),
    and used to support university teaching.

    This file is part of SWAD core.
    Copyright (C) 1999-2019 Antonio Caņas Vargas

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/*****************************************************************************/
/********************************* Headers ***********************************/
/*****************************************************************************/

#define _GNU_SOURCE 		// For vasprintf
#include <stdarg.h>		// For va_start, va_end
#include <stdio.h>		// For fprintf, vasprintf
#include <stdlib.h>		// For free

#include "swad_table.h"
#include "swad_global.h"

/*****************************************************************************/
/************** External global variables from others modules ****************/
/*****************************************************************************/

extern struct Globals Gbl;

/*****************************************************************************/
/****************************** Public constants *****************************/
/*****************************************************************************/

/*****************************************************************************/
/***************************** Private constants *****************************/
/*****************************************************************************/

/*****************************************************************************/
/******************************* Private types *******************************/
/*****************************************************************************/

/*****************************************************************************/
/***************************** Private prototypes ****************************/
/*****************************************************************************/

/*****************************************************************************/
/******************************* Start/end table *****************************/
/*****************************************************************************/

void Tbl_StartTableClass (const char *fmt,...)
  {
   va_list ap;
   int NumBytesPrinted;
   char *Class;

   if (fmt)
     {
      if (fmt[0])
	{
	 va_start (ap,fmt);
	 NumBytesPrinted = vasprintf (&Class,fmt,ap);
	 va_end (ap);

	 if (NumBytesPrinted < 0)	// If memory allocation wasn't possible,
				      // or some other error occurs,
				      // vasprintf will return -1
	    Lay_NotEnoughMemoryExit ();

	 /***** Print HTML *****/
	 fprintf (Gbl.F.Out,
		  "<table class=\"%s\">",Class);

	 free ((void *) Class);
	}
      else
         Tbl_StartTable ();
     }
   else
      Tbl_StartTable ();
  }

void Tbl_StartTablePadding (unsigned CellPadding)
  {
   if (CellPadding)
      fprintf (Gbl.F.Out,
	       "<table class=\"CELLS_PAD_%u\">",
	       CellPadding);	// CellPadding must be 0, 1, 2, 5 or 10
   else
      Tbl_StartTable ();
  }

void Tbl_StartTable (void)
  {
   fprintf (Gbl.F.Out,
	    "<table>");
  }

void Tbl_StartTableCenterPadding (unsigned CellPadding)
  {
   if (CellPadding)
      fprintf (Gbl.F.Out,
	       "<table class=\"FRAME_TBL_CENTER CELLS_PAD_%u\">",
	       CellPadding);	// CellPadding must be 0, 1, 2, 5 or 10
   else
      Tbl_StartTableCenter ();
  }

void Tbl_StartTableCenter (void)
  {
   fprintf (Gbl.F.Out,
	    "<table class=\"FRAME_TBL_CENTER\">");
  }

void Tbl_StartTableWidePadding (unsigned CellPadding)
  {
   if (CellPadding)
      fprintf (Gbl.F.Out,
	       "<table class=\"FRAME_TBL_WIDE CELLS_PAD_%u\">",
	       CellPadding);	// CellPadding must be 0, 1, 2, 5 or 10
   else
      Tbl_StartTableWide ();
  }

void Tbl_StartTableWide (void)
  {
   fprintf (Gbl.F.Out,
	    "<table class=\"FRAME_TBL_WIDE\">");
  }

void Tbl_StartTableWideMarginPadding (unsigned CellPadding)
  {
   if (CellPadding)
      fprintf (Gbl.F.Out,
	       "<table class=\"FRAME_TBL_WIDE_MARGIN CELLS_PAD_%u\">",
	       CellPadding);	// CellPadding must be 0, 1, 2, 5 or 10
   else
      Tbl_StartTableWideMargin ();
  }

void Tbl_StartTableWideMargin (void)
  {
   fprintf (Gbl.F.Out,
	    "<table class=\"FRAME_TBL_WIDE_MARGIN\">");
  }

void Tbl_EndTable (void)
  {
   fprintf (Gbl.F.Out,
	    "</table>");
  }

/*****************************************************************************/
/**************************** Start/end table row ****************************/
/*****************************************************************************/

void Tbl_StartRowAttr (const char *fmt,...)
  {
   va_list ap;
   int NumBytesPrinted;
   char *Attr;

   if (fmt)
     {
      if (fmt[0])
	{
	 va_start (ap,fmt);
	 NumBytesPrinted = vasprintf (&Attr,fmt,ap);
	 va_end (ap);

	 if (NumBytesPrinted < 0)	// If memory allocation wasn't possible,
					// or some other error occurs,
					// vasprintf will return -1
	    Lay_NotEnoughMemoryExit ();

	 /***** Print HTML *****/
	 fprintf (Gbl.F.Out,
		  "<tr %s>",Attr);

	 free ((void *) Attr);
	}
      else
         Tbl_StartRow ();
     }
   else
      Tbl_StartRow ();
  }

void Tbl_StartRow (void)
  {
   fprintf (Gbl.F.Out,
	    "<tr>");
  }

void Tbl_EndRow (void)
  {
   fprintf (Gbl.F.Out,
	    "</tr>");
  }

/*****************************************************************************/
/********************************* Table cells *******************************/
/*****************************************************************************/

void Tbl_EndCell (void)
  {
   fprintf (Gbl.F.Out,
	    "</td>");
  }

void Tbl_PutEmptyCells (unsigned NumColumns)
  {
   unsigned NumCol;

   for (NumCol = 0;
	NumCol < NumColumns;
	NumCol++)
      fprintf (Gbl.F.Out,
	       "<td></td>");
  }

void Tbl_PutEmptyColouredCells (unsigned NumColumns)
  {
   unsigned NumCol;

   for (NumCol = 0;
	NumCol < NumColumns;
	NumCol++)
      fprintf (Gbl.F.Out,
	       "<td class=\"COLOR%u\"></td>",
	       Gbl.RowEvenOdd);
  }