## Copyright (C) 2010 Shai Ayal
##
## 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
## <http://www.gnu.org/licenses/>.

## -*- texinfo -*-
## @deftypefn {Function File} {} __fltk_print__ (@var{@dots{}})
## Undocumented internal function.
## @end deftypefn

function opts = __fltk_print__ (opts)

  dos_shell = (ispc () && ! isunix ());

  figure (opts.figure)
  drawnow ("expose")

  if (! isempty (opts.fig2dev_binary))
    ## fig2dev is prefered for conversion to emf
    fig2dev_devices = {"pstex", "mf", "emf"};
  else
    fig2dev_devices = {"pstex", "mf"};
  endif

  gl2ps_device = {};
  pipeline = {};
  switch (lower (opts.devopt))
  case {"eps", "eps2", "epsc", "epsc2"}
    ## format GL2PS_EPS
    gl2ps_device = {"eps"};
    ## FIXME - use epstool to tighten bbox and provide preview.
    pipeline = {opts.epstool_cmd(opts, "-", opts.name)};
  case {"epslatex", "pslatex", "pdflatex", "epslatexstandalone", ...
        "pslatexstandalone", "pdflatexstandalone"}
    ## format GL2PS_TEX
    n = find (opts.devopt == "l", 1);
    suffix = opts.devopt(1:n-1);
    dot = find (opts.name == ".", 1, "last");
    if ((! isempty (dot))
        && any (strcmpi (opts.name(dot:end), ...
                {".eps", ".ps", ".pdf", ".tex", "."})))
      name = opts.name(1:dot-1);
      if (dot < numel (opts.name)
          && any (strcmpi (opts.name(dot+1:end), {"eps", "ps", "pdf"})))
        ## If user provides eps/ps/pdf suffix, use it.
        suffix = opts.name(dot+1:end);
      endif
    elseif (dot == numel (opts.name))
      name = opts.name;
    endif
    gl2ps_device = {sprintf("%snotxt", lower (suffix))};
    gl2ps_device{2} = "tex";
    if (dos_shell)
      pipeline = {sprintf("copy con %s.%s", name, suffix)};
      pipeline{2} = sprintf ("copy con %s.tex", name);
    else
      pipeline = {sprintf("cat > %s.%s", name, suffix)};
      pipeline{2} = sprintf ("cat > %s.tex", name);
    endif
  case "tikz"
    ## format GL2PS_PGF
    gl2ps_device = {"pgf"};
    pipeline = {sprintf("cat > %s", opts.name)};
  case "svg"
    ## format GL2PS_SVG
    gl2ps_device = {"svg"};
    pipeline = {sprintf("cat > %s", opts.name)};
  case fig2dev_devices
    cmd_pstoedit = opts.pstoedit_cmd (opts, "fig");
    cmd_fig2dev = opts.fig2dev_cmd (opts, opts.devopt);
    if (strcmp (opts.devopt, "pstex"))
      [~, ~, ext] = fileparts (opts.name);
      if (any (strcmpi (ext, {".ps", ".tex", "."})))
        opts.name = opts.name(1:end-numel(ext));
      endif
      opts.name = strcat (opts.name, ".ps");
      cmd = sprintf ("%s | %s > %s", cmd_pstoedit, cmd_fig2dev, opts.name);
      gl2ps_device = {"eps"};
      pipeline = {cmd};
      cmd_fig2dev = opts.fig2dev_cmd (opts, "pstex_t");
      gl2ps_device{2} = "eps";
      pipeline{2} = sprintf ("%s | %s > %s", cmd_pstoedit,
                             cmd_fig2dev, strrep(opts.name, ".ps", ".tex"));
    else
      cmd = sprintf ("%s | %s > %s", cmd_pstoedit, cmd_fig2dev, opts.name);
      gl2ps_device = {"eps"};
      pipeline = {cmd};
    endif
  case "aifm"
    cmd = opts.pstoedit_cmd (opts, "ps2ai");
    gl2ps_device = {"eps"};
    pipeline = {sprintf("%s > %s", cmd, opts.name)};
  case {"dxf", "emf", "fig", "hpgl"}
    cmd = opts.pstoedit_cmd (opts);
    gl2ps_device = {"eps"};
    pipeline = {sprintf("%s > %s", cmd, opts.name)};
  case {"corel", "gif"}
    error ("print:unsupporteddevice",
           "print.m: %s output is not available for the FLTK backend.",
           upper (opts.devopt))
  case opts.ghostscript.device
    opts.ghostscript.source = "-";
    opts.ghostscript.output = opts.name;
    if (opts.send_to_printer)
      opts.unlink(strcmp (opts.unlink, opts.ghostscript.output)) = [];
      opts.ghostscript.output = "-";
    endif
    [cmd_gs, cmd_cleanup] = __ghostscript__ (opts.ghostscript);
    if (opts.send_to_printer || isempty (opts.name))
      cmd_lpr = opts.lpr_cmd (opts);
      cmd = sprintf("%s | %s", cmd_gs, cmd_lpr);
    else
      cmd = sprintf("%s", cmd_gs);
    endif
    if (! isempty (cmd_cleanup))
      gl2ps_device = {"eps"};
      if (dos_shell)
        pipeline = {sprintf("%s & %s", cmd, cmd_cleanup)};
      else
        pipeline = {sprintf("%s ; %s", cmd, cmd_cleanup)};
      endif
    else
      gl2ps_device = {"eps"};
      pipeline = {cmd};
    endif
  otherwise
    error (sprintf ("print:no%soutput", opts.devopt),
           "print.m: %s output is not available for GL2PS output.",
           upper (opts.devopt))
  endswitch

  opts.pipeline = pipeline;

  for n = 1:numel(pipeline)
    if (opts.debug)
      fprintf ("fltk-pipeline: '%s'\n", pipeline{n})
    endif
    pid = popen (pipeline{n}, "w");
    if (pid < 0)
      error ("print:popenfailed", "print.m: failed to open pipe.");
    endif
    unwind_protect
      drawnow (gl2ps_device{n} , sprintf ("%d" , pid));
      waitpid (pid);
    unwind_protect_cleanup
      pclose (pid);
    end_unwind_protect
  endfor

endfunction