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########################################################################
##
## Copyright (C) 2010-2024 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this
## distribution or <https://octave.org/copyright/>.
##
## This file is part of Octave.
##
## Octave 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 3 of the License, or
## (at your option) any later version.
##
## Octave 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 Octave; see the file COPYING. If not, see
## <https://www.gnu.org/licenses/>.
##
########################################################################
## -*- texinfo -*-
## @deftypefn {} {@var{has_terminal} =} __gnuplot_has_terminal__ (@var{term})
## @deftypefnx {} {@var{has_terminal} =} __gnuplot_has_terminal__ (@var{term}, @var{plot_stream})
## Undocumented internal function.
## @end deftypefn
function gnuplot_supports_term = __gnuplot_has_terminal__ (term, plot_stream)
term = strtrim (term);
term = lower (strtok (term, " "));
if (nargin < 2)
plot_stream = __gnuplot_open_stream__ (2);
endif
available_terminals = __gnuplot_get_var__ (plot_stream, "GPVAL_TERMINALS");
available_terminals = regexp (available_terminals, '\w+', "match");
if (nargin < 2 && ! isempty (plot_stream))
pclose (plot_stream(1));
if (numel (plot_stream) > 1)
pclose (plot_stream(2));
endif
if (numel (plot_stream) > 2)
waitpid (plot_stream(3));
endif
endif
gnuplot_supports_term = any (strcmp (term, available_terminals));
endfunction
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