# -*- shell-script -*-
# display.sh - Bourne Again Shell Debugger display routines
#
#   Copyright (C) 2010 Rocky Bernstein
#   rocky@gnu.org
#
#   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, 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
#   General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this Program; see the file COPYING.  If not, write to
#   the Free Software Foundation, 59 Temple Place, Suite 330, Boston,
#   MA 02111 USA.

#================ VARIABLE INITIALIZATIONS ====================#

# Display data structures
typeset -a  _Dbg_disp_exp = ''; setglobal _Dbg_disp_exp = ''() # Watchpoint expressions
typeset -ia _Dbg_disp_enable = ''; setglobal _Dbg_disp_enable = ''() # 1/0 if enabled or not
typeset -i  _Dbg_disp_max = '0'     # Needed because we can't figure out what
                                # the max index is and arrays can be sparse


#========================= FUNCTIONS   ============================#

proc _Dbg_save_display {
  typeset -p _Dbg_disp_exp >> $_Dbg_statefile
  typeset -p _Dbg_disp_enable >> $_Dbg_statefile
  typeset -p _Dbg_disp_max >> $_Dbg_statefile
}

# Enable/disable display by entry numbers.
proc _Dbg_disp_enable_disable {
    if sh-expr '$# < 2'  {
	_Dbg_errmsg "Expecting at least two parameters. Got: $(#)."
	return 1
    }
    typeset -i on = $1
    typeset en_dis = $2
    shift; shift

    typeset to_go = @Argv
    typeset i = ''
    eval $_seteglob
    for i in [$to_go]  {
	match $i {
	    with $int_pat 
                _Dbg_enable_disable_display $on $en_dis $i
		
	with * 
		_Dbg_errmsg "Invalid entry number $i skipped"
		
	}
    }
    eval $_resteglob
    return 0
}

proc _Dbg_eval_all_display {
  typeset -i i = ''
  for (( i=0; i < _Dbg_disp_max ; i++ )) ; do
    if [ -n "${_Dbg_disp_exp[$i]}" ] \
      && [[ ${_Dbg_disp_enable[i]} != 0 ]] ; then
      _Dbg_printf_nocr "%2d: %s = " $i "${_Dbg_disp_exp[i]}"
      typeset -i _Dbg_show_eval_rc; _Dbg_show_eval_rc=0
      _Dbg_do_eval "_Dbg_msg ${_Dbg_disp_exp[i]}"
    fi
  done
}

# Enable/disable display(s) by entry numbers.
proc _Dbg_enable_disable_display {
  typeset -i on = $1
  typeset en_dis = $2
  typeset -i i = $3
  if test -n $(_Dbg_disp_exp[$i])  {
    if [[ ${_Dbg_disp_enable[$i]} == $on ]]  {
      _Dbg_errmsg "Display entry $i already $(en_dis), so nothing done."
    } else {
      _Dbg_write_journal_eval "_Dbg_disp_enable[$i]=$on"
      _Dbg_msg "Display entry $i $en_dis."
    }
  } else {
    _Dbg_errmsg "Display entry $i doesn't exist, so nothing done."
  }
}