/***********************************************************************/
/* ERROR.C - Function to display error messages.                       */
/***********************************************************************/
/*
 * THE - The Hessling Editor. A text editor similar to VM/CMS xedit.
 * Copyright (C) 1991-2001 Mark Hessling
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to:
 *
 *    The Free Software Foundation, Inc.
 *    675 Mass Ave,
 *    Cambridge, MA 02139 USA.
 *
 *
 * If you make modifications to this software that you feel increases
 * it usefulness for the rest of the community, please email the
 * changes, enhancements, bug fixes as well as any and all ideas to me.
 * This software is going to be maintained and enhanced as deemed
 * necessary by the community.
 *
 * Mark Hessling,  M.Hessling@qut.edu.au  http://www.lightlink.com/hessling/
 */

static char RCSid[] = "$Id: error.c,v 1.14 2005/09/01 10:32:22 mark Exp $";

#include <the.h>
#include <proto.h>

/*-------------------------- global   data -----------------------------*/

CHARTYPE *last_message=NULL;          /* contents of last error message */
int last_message_length=0;
static int errors_displayed=0;            /* number of errors displayed */
static LINE *first_error=NULL;                   /* first error message */
static LINE *last_error=NULL;                     /* last error message */

#ifdef HAVE_PROTO
static void open_msgline(ROWTYPE,ROWTYPE,ROWTYPE);
#else
static void open_msgline();
#endif
/***********************************************************************/
#ifdef HAVE_PROTO
void display_error(unsigned short err_num,CHARTYPE *mess,bool ignore_bell)
#else
void display_error(err_num,mess,ignore_bell)
unsigned short err_num;
CHARTYPE *mess;
bool ignore_bell;
#endif
/***********************************************************************/
{
static CHARTYPE _THE_FAR *error_message[] =
{
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0001: Invalid operand:",
   (CHARTYPE *)"Error 0002: Too many operands",
   (CHARTYPE *)"Error 0003: Too few operands",
   (CHARTYPE *)"Error 0004: Invalid number:",
   (CHARTYPE *)"Error 0005: Numeric operand too small",
   (CHARTYPE *)"Error 0006: Numeric operand too large",
   (CHARTYPE *)"Error 0007: Invalid fileid:",
   (CHARTYPE *)"Error 0008: Invalid or protected file",
   (CHARTYPE *)"Error 0009: File not found",
   (CHARTYPE *)"Error 0010: Path not found",
   (CHARTYPE *)"Error 0011: File not found in THE_MACRO_PATH:",
   (CHARTYPE *)"Error 0012: Margins settings are inconsistent",
   (CHARTYPE *)"Error 0013: Invalid key name:",
   (CHARTYPE *)"File is read-only:",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0017: Target not found",
   (CHARTYPE *)"Error 0018: Invalid line name",
   (CHARTYPE *)"",
   (CHARTYPE *)"New file:",
   (CHARTYPE *)"Error 0021: Invalid command:",
   (CHARTYPE *)"Error 0022: File has been changed - use QQUIT to really quit",
   (CHARTYPE *)"Error 0023: Help file not found:",
   (CHARTYPE *)"Error 0024: Invalid command while running in batch:",
   (CHARTYPE *)"Error 0025: Error accessing REXX variable",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0029: Cannot edit -",
   (CHARTYPE *)"Error 0030: Memory shortage",
   (CHARTYPE *)"Error 0031: File already exists - use FFILE/SSAVE",
   (CHARTYPE *)"Error 0032: Invalid hexadecimal or decimal value:",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0034: Line not found",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0036: No lines changed",
   (CHARTYPE *)"Error 0037: Operand too long:",
   (CHARTYPE *)"Error 0038: Improper cursor position",
   (CHARTYPE *)"Error 0039: No remembered operand available",
   (CHARTYPE *)"Error 0040: /bin/sh cannot suspend this process",
   (CHARTYPE *)"Error 0041: Invalid SOS command:",
   (CHARTYPE *)"Error 0042: Invalid SET command:",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0044: No marked block",
   (CHARTYPE *)"Error 0045: Marked block not in current file",
   (CHARTYPE *)"Error 0046: Block boundary excluded, not in range, or past truncation column",
   (CHARTYPE *)"Error 0047: Operation invalid for line blocks",
   (CHARTYPE *)"Error 0048: Operation invalid for box blocks",
   (CHARTYPE *)"Error 0049: Operation invalid for stream blocks",
   (CHARTYPE *)"Error 0050: Invalid move location",
   (CHARTYPE *)"Error 0051: No preserved settings to restore",
   (CHARTYPE *)"Error 0052: Non-REXX macros MUST have a first line of /*NOREXX*/",
   (CHARTYPE *)"Error 0053: Valid only when issued from a REXX macro",
   (CHARTYPE *)"Error 0054: REXX interpreter returned an error",
   (CHARTYPE *)"Error 0055: No lines sorted",
   (CHARTYPE *)"Error 0056: Action invalid in read-only mode.",
   (CHARTYPE *)"Error 0057: Disk full error",
   (CHARTYPE *)"Error 0058: Valid only with REXX support:",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0060: Line name not found:",
   (CHARTYPE *)"Error 0061: Colour support not available:",
   (CHARTYPE *)"Error 0062: Operation invalid for multi-line stream blocks",
   (CHARTYPE *)"Error 0063: Invalid cursor line or column",
   (CHARTYPE *)"Error 0064: Line not reserved",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0066: Invalid match position",
   (CHARTYPE *)"Error 0067: Invalid match character",
   (CHARTYPE *)"Error 0068: Matching character not found",
   (CHARTYPE *)"Error 0069: Invalid character",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0077: Files still open in batch:",
   (CHARTYPE *)"Error 0078: Printing error:",
   (CHARTYPE *)"Error 0079: Can't add another tab position; already have 32 defined",
   (CHARTYPE *)"Error 0080: Can't add another CTLCHAR; already have 64 defined",
   (CHARTYPE *)"Error 0081: Only single-line marked blocks allowed",
   (CHARTYPE *)"Error 0082: Feature not supported:",
   (CHARTYPE *)"Error 0083: Command invalid when ring is empty",
   (CHARTYPE *)"Unable to restore",
   (CHARTYPE *)"Error 0085: Length of operand > 10",
   (CHARTYPE *)"Error 0086: Command line unavailable",
   (CHARTYPE *)"Error 0087: Cursor line not in scope",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0138: Unexpected file time stamp change - use FFILE/SSAVE",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0148: Already recording a macro",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0186: Error accessing clipboard",
   (CHARTYPE *)"Error 0187: No text in clipboard",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0199: Parser not defined:",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"",
   (CHARTYPE *)"Error 0216: TLD error:",
};
   int new_last_message_length = 0;
   int x=0, y=0;

   TRACE_FUNCTION("error.c:   display_error");

   if( curses_started
   &&  CURRENT_VIEW != NULL
   &&  CURRENT_WINDOW != NULL )
      getyx( CURRENT_WINDOW, y, x );
   /*
    * Always save message text, even if MSGMODE is OFF...
    * If no error number, display text only...
    */
   new_last_message_length = 2 + ((err_num == 0) ? strlen((DEFCHAR*)mess) : strlen((DEFCHAR*)mess) + strlen((DEFCHAR*)error_message[err_num]) + 1);
   if (last_message == NULL)
   {
      last_message_length = new_last_message_length;
      last_message = (CHARTYPE *)(*the_malloc)(last_message_length*sizeof(CHARTYPE));
      if (last_message == NULL)
      {
         TRACE_RETURN();
         return;
      }
   }
   else
   {
      if (new_last_message_length > last_message_length)
      {
         last_message_length = new_last_message_length;
         last_message = (CHARTYPE *)(*the_realloc)(last_message,last_message_length*sizeof(CHARTYPE));
         if (last_message == NULL)
         {
            TRACE_RETURN();
            return;
         }
      }
   }
   if (err_num == 0)
      strcpy((DEFCHAR *)last_message,(DEFCHAR *)mess);
   else
      sprintf((DEFCHAR *)last_message,"%s %s",error_message[err_num],mess);
   /*
    * If msgmode is off, don't display any errors.
    */
   if (CURRENT_VIEW != NULL)
   {
      if (!CURRENT_VIEW->msgmode_status)
      {
         TRACE_RETURN();
         return;
      }
   }
   /*
    * If running from NOMSG command, don't display any errors.
    */
   if (in_nomsg)
   {
      TRACE_RETURN();
      return;
   }
#ifdef MSWIN
   {
   char hdr[512];
   if (in_profile)
   {
      if (!error_on_screen
      &&  !be_quiet)
      {
         if (number_of_files == 0)
            sprintf(hdr,"*** Messages from profile file  ***\n");
         else
            sprintf(hdr,"*** Messages from profile file for ***\n%s%s\n",
                           CURRENT_FILE->fpath,CURRENT_FILE->fname);
      }
      error_on_screen = TRUE;
      Operator("%s%s",hdr,last_message);
      TRACE_RETURN();
      return;
   }
   }
#else
   if (!curses_started)
   {
      if (!error_on_screen
      &&  !be_quiet)
      {
         if (number_of_files == 0)
            fprintf(stderr,"*** Messages from profile file ***\n");
         else
            fprintf(stderr,"*** Messages from profile file for %s%s ***\n",
                           CURRENT_FILE->fpath,CURRENT_FILE->fname);
      }
      error_on_screen = TRUE;
      fprintf(stderr,"%s\n",last_message);
      TRACE_RETURN();
      return;
   }
#endif
   /*
    * Append the current message to the end of the error linked list.
    */
   last_error = lll_add(first_error,last_error,sizeof(LINE));
   if (last_error == NULL)
   {
      TRACE_RETURN();
      return;
   }
   last_error->line = (CHARTYPE *)(*the_malloc)((strlen((DEFCHAR *)last_message)+1)*sizeof(CHARTYPE));
   if (last_error->line == NULL)
   {
      TRACE_RETURN();
      return;
   }
   strcpy((DEFCHAR *)last_error->line,(DEFCHAR *)last_message);
   last_error->length = strlen((DEFCHAR *)last_message);
   if (first_error == NULL)
      first_error = last_error;
   errors_displayed++;
   expose_msgline();
   /*
    * If capturing REXX output, then add a new line to the pseudo file.
    */
   if (CAPREXXOUTx
   &&  rexx_output)
   {
      rexxout_number_lines++;
      rexxout_curr = add_LINE(rexxout_first_line,rexxout_curr,
                            last_message,strlen((DEFCHAR *)last_message),0,FALSE);
   }
#ifdef HAVE_BEEP
   if (BEEPx
   && !ignore_bell)
      beep();
#endif
   if( curses_started
   &&  CURRENT_VIEW != NULL
   &&  CURRENT_WINDOW != NULL )
      wmove( CURRENT_WINDOW, y, x );
   if ( first_screen_display )
      wrefresh( error_window );
   TRACE_RETURN();
   return;
}
/***********************************************************************/
#ifdef HAVE_PROTO
static void open_msgline(ROWTYPE base, ROWTYPE off,ROWTYPE rows)
#else
static void open_msgline(base,off,rows)
ROWTYPE base,off,rows;
#endif
/***********************************************************************/
{
   int start_row=0;
   COLOUR_ATTR attr;

   TRACE_FUNCTION( "error.c:   open_msgline" );
   if ( CURRENT_VIEW == NULL
   ||   CURRENT_FILE == NULL )
      set_up_default_colours( (FILE_DETAILS *)NULL, &attr, ATTR_MSGLINE );
   else
      memcpy( &attr, CURRENT_FILE->attr+ATTR_MSGLINE, sizeof(COLOUR_ATTR) );
   start_row = calculate_actual_row( base, off, CURRENT_SCREEN.screen_rows, TRUE );
   if ( base == POSITION_BOTTOM )
      start_row = start_row - rows + 1;
   if ( error_window != NULL )
      delwin( error_window );
   error_window = newwin( rows, CURRENT_SCREEN.screen_cols, CURRENT_SCREEN.screen_start_row + start_row, CURRENT_SCREEN.screen_start_col );
   wattrset( error_window, set_colour(&attr) );
   TRACE_RETURN();
   return;
}
/***********************************************************************/
#ifdef HAVE_PROTO
void clear_msgline(int key)
#else
void clear_msgline(key)
int key;
#endif
/***********************************************************************/
{
   TRACE_FUNCTION("error.c:   clear_msgline");
   /*
    * Only clear the message line if the supplied key matches that set
    * by SET CLEARERRORKEY.  -1 indicates any key can clear
    */
   if ( curses_started && ( key == CLEARERRORKEYx
                            ||  CLEARERRORKEYx == -1 ) )
   {
      errors_displayed = 0;
      error_on_screen = FALSE;
      if (error_window != (WINDOW *)NULL)
      {
         delwin(error_window);
         error_window = (WINDOW *)NULL;
      }
      first_error = last_error = lll_free(first_error);
      if (display_screens > 1)
         redraw_screen((CHARTYPE)(other_screen));
      redraw_screen(current_screen);
      doupdate();
   }
   TRACE_RETURN();
   return;
}
/***********************************************************************/
#ifdef HAVE_PROTO
void display_prompt(CHARTYPE *prompt)
#else
void display_prompt(prompt)
CHARTYPE *prompt;
#endif
/***********************************************************************/
{
   TRACE_FUNCTION("error.c:   display_prompt");
   open_msgline(CURRENT_VIEW->msgline_base,CURRENT_VIEW->msgline_off,1);
   wmove(error_window,0,0);
   my_wclrtoeol(error_window);
   put_string(error_window,0,0,prompt,strlen((DEFCHAR *)prompt));
   wrefresh(error_window);
   error_on_screen = TRUE;
   TRACE_RETURN();
   return;
}
/***********************************************************************/
#ifdef HAVE_PROTO
void expose_msgline(void)
#else
void expose_msgline()
#endif
/***********************************************************************/
{
   LINE *curr_error=NULL;
   register int i=0;
   ROWTYPE errors_to_display=0;
   CHARTYPE msgline_base=POSITION_TOP;
   short msgline_off=2;
   ROWTYPE msgline_rows=5,max_rows,start_row;

   TRACE_FUNCTION("error.c:   expose_msgline");
   /*
    * If msgmode is off, don't display any errors.
    */
   if (CURRENT_VIEW != NULL)
   {
      if (!CURRENT_VIEW->msgmode_status)
      {
         TRACE_RETURN();
         return;
      }
      msgline_rows = CURRENT_VIEW->msgline_rows;
      msgline_base = CURRENT_VIEW->msgline_base;
      msgline_off = CURRENT_VIEW->msgline_off;
   }
   curr_error = last_error;
   /*
    * Determine the maximum number of rows we can have in the MSGLINE
    */
   start_row = calculate_actual_row( msgline_base, msgline_off, CURRENT_SCREEN.screen_rows, TRUE );
   if ( msgline_base == POSITION_BOTTOM )
      max_rows = start_row + 1;
   else
      max_rows = CURRENT_SCREEN.screen_rows - start_row;
   /*
    * Calculate number of errors. This determines size of window to be
    * created.
    */
   if ( msgline_rows == 0 )
      msgline_rows = min( max_rows, errors_displayed );
   else
      msgline_rows = min( msgline_rows, errors_displayed );
   errors_to_display = min( max_rows, msgline_rows );
   /*
    * Create the window; errors_to_display rows long.
    */
   open_msgline( msgline_base, msgline_off, errors_to_display );
   /*
    * For all errors that are to be displayed, display them starting from
    * the bottom of the window.
    */
   for ( i = errors_to_display - 1; i > -1; i-- )
   {
      wmove( error_window, i, 0 );
      my_wclrtoeol( error_window );
      if ( CURRENT_VIEW == NULL
      ||   CURRENT_FILE == NULL)
         mvwaddstr( error_window, i, 0, (DEFCHAR *)curr_error->line );
      else
         put_string( error_window, (ROWTYPE)i, 0, curr_error->line, curr_error->length );
      curr_error = curr_error->prev;
   }
   wnoutrefresh( error_window );
   error_on_screen = TRUE;
   if ( errors_to_display == msgline_rows
   &&   errors_displayed % errors_to_display == 1
   &&   curr_error != NULL )
   {
      wmove( error_window, msgline_rows - 1, 0 );
      my_wclrtoeol( error_window );
      if ( CURRENT_VIEW == NULL
      ||   CURRENT_FILE == NULL)
         mvwaddstr( error_window, msgline_rows - 1, 0, (DEFCHAR *)"Press any key to continue..." );
      else
         put_string( error_window, (ROWTYPE)(msgline_rows - 1), 0, (CHARTYPE *)"Press any key to continue...", 28 );
      wrefresh( error_window );
      my_getch( stdscr );
   }
   TRACE_RETURN();
   return;
}