## Copyright (C) 1999, 2005, 2006, 2007, 2008 Daniel Heiserer
## Copyright (C) 2001 Laurent Mazet
##
## 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} {} print (@var{filename}, @var{options})
## @deftypefnx {Function File} {} print (@var{h}, @var{filename}, @var{options})
## Print a graph, or save it to a file
##
## @var{filename} defines the file name of the output file. If no
## filename is specified, output is sent to the printer.
##
## @var{h} specifies the figure handle. If no handle is specified
## the handle for the current figure is used.
##
## @var{options}:
## @table @code
## @item -P@var{printer}
##   Set the @var{printer} name to which the graph is sent if no
##   @var{filename} is specified.
## @item -color
## @itemx -mono
##   Monochrome or colour lines.
## @item -solid
## @itemx -dashed
##   Solid or dashed lines.
## @item -portrait
## @itemx -landscape
##   Plot orientation, as returned by "orient".
## @item -d@var{device}
##   Output device, where @var{device} is one of:
##   @table @code
##   @item ps
##   @itemx ps2
##   @itemx psc
##   @itemx psc2
##     Postscript (level 1 and 2, mono and color)
##   @item eps
##   @itemx eps2
##   @itemx epsc
##   @itemx epsc2
##     Encapsulated postscript (level 1 and 2, mono and color)
##   @item tex
##   @itemx epslatex
##   @itemx epslatexstandalone
##   @itemx pstex
##   @itemx pslatex
##     Generate a LaTeX (or TeX) file for labels, and eps/ps for
##     graphics.  The file produced by @code{epslatexstandalone} can be
##     processed directly by LaTeX.  The other formats are intended to
##     be included in a LaTeX (or TeX) document.  The @code{tex} device
##     is the same as the @code{epslatex} device.
##   @item ill
##   @itemx aifm
##     Adobe Illustrator
##   @item cdr
##   @itemx corel
##     CorelDraw
##   @item dxf
##     AutoCAD
##   @item emf
##     Microsoft Enhanced Metafile
##   @item fig
##     XFig.  If this format is selected the additional options
##     @code{-textspecial} or @code{-textnormal} can be used to control
##     whether the special flag should be set for the text in the figure
##     (default is @code{-textnormal}). 
##   @item hpgl
##     HP plotter language
##   @item mf
##     Metafont
##   @item png
##     Portable network graphics
##   @item jpg
##   @itemx jpeg
##     JPEG image
##   @item gif
##     GIF image
##   @item pbm
##     PBMplus
##   @item svg
##     Scalable vector graphics
##   @item pdf
##     Portable document format
##   @end table
##
##   Other devices are supported by "convert" from ImageMagick.  Type
##   system("convert") to see what formats are available.
##
##   If the device is omitted, it is inferred from the file extension,
##   or if there is no filename it is sent to the printer as postscript.
##
## @itemx -r@var{NUM}
##   Resolution of bitmaps in pixels per inch.
##
## @itemx -S@var{xsize},@var{ysize}
##   Plot size in pixels for PNG and SVG.  If using the command form of
##   the print function, you must quote the @var{xsize},@var{ysize}
##   option.  For example, by writing @code{"-S640,480"}.
##
## @item -F@var{fontname}
## @itemx -F@var{fontname}:@var{size}
## @itemx -F:@var{size}
##   @var{fontname} set the postscript font (for use with postscript,
##   aifm, corel and fig). By default, 'Helvetica' is set for PS/Aifm,
##   and 'SwitzerlandLight' for Corel. It can also be 'Times-Roman'.
##   @var{size} is given in points. @var{fontname} is ignored for the
##   fig device.
## @end table
##
## The filename and options can be given in any order.
## @end deftypefn

## Author: Daniel Heiserer <Daniel.heiserer@physik.tu-muenchen.de>
## Adapted-By: jwe

function print (varargin)

  orientation = orient ();
  use_color = 0; # 0=default, -1=mono, +1=color
  force_solid = 0; # 0=default, -1=dashed, +1=solid
  fontsize = "";
  font = "";
  size = "";
  name = "";
  devopt = "";
  printer = "";
  debug = false;
  debug_file = "octave-print-commands.log";
  special_flag = "textnormal";
  resolution = "";

  old_fig = get (0, "currentfigure");
  unwind_protect
    ## Ensure the last figure is on the screen for single line commands like
    ##   plot(...); print(...);
    drawnow ();

    for i = 1:nargin
      arg = varargin{i};
      if (ischar (arg))
        if (strcmp (arg, "-color"))
	use_color = 1;
        elseif (strcmp (arg, "-mono"))
	  use_color = -1;
        elseif (strcmp (arg, "-solid"))
          force_solid = 1;
        elseif (strcmp (arg, "-dashed"))
          force_solid = -1;
        elseif (strcmp (arg, "-portrait"))
	  orientation = "portrait";
        elseif (strcmp (arg, "-landscape"))
	  orientation = "landscape";
        elseif (strcmp (arg, "-textspecial"))
	  special_flag = "textspecial";
        elseif (strncmp (arg, "-debug", 6))
	  debug = true;
	  if (length (arg) > 7)
	    debug_file = arg(8:end);
	  endif
        elseif (length (arg) > 2 && arg(1:2) == "-d")
	  devopt = arg(3:end);
        elseif (length (arg) > 2 && arg(1:2) == "-P")
	  printer = arg;
        elseif (length (arg) > 2 && arg(1:2) == "-F")
	  idx = rindex (arg, ":");
	  if (idx)
	    font = arg(3:idx-1);
	    fontsize = arg(idx+1:length(arg));
	  else
	    font = arg(3:length(arg));
	  endif
        elseif (length (arg) > 2 && arg(1:2) == "-S")
	  size = arg(3:length(arg));
        elseif (length (arg) > 2 && arg(1:2) == "-r")
	  resolution = arg(3:length(arg));
        elseif (length (arg) >= 1 && arg(1) == "-")
	  error ("print: unknown option `%s'", arg);
	elseif (length (arg) > 0)
	  name = arg;
        endif
      elseif (isfigure (arg))
        figure (arg);
      else
        error ("print: expecting inputs to be character string options or a figure handle");
      endif
    endfor

    doprint = isempty (name);
    if (doprint)
      if (isempty (devopt))
        printname = cstrcat (tmpnam, ".ps");
      else
        printname = cstrcat (tmpnam, ".", devopt);
      endif
      name = printname;
    endif

    if (isempty (devopt))
      dot = rindex (name, ".");
      if (dot == 0)
        error ("print: no format specified");
      else
        dev = tolower (name(dot+1:end));
      endif
    else
      dev = devopt;
    endif

    if (strcmp (dev, "tex"))
      dev = "epslatex";
      ## gnuplot 4.0 wants ".eps" in the output name    
      if (! __gnuplot_has_feature__ ("epslatex_implies_eps_filesuffix"))
        name = cstrcat (name(1:dot), "eps");
      endif
    elseif (strcmp (dev, "ill"))
      dev = "aifm";
    elseif (strcmp (dev, "cdr"))
      dev = "corel";
    endif

    ## check if we have to use convert
    dev_list = {"aifm", "corel", "fig", "png", "jpg", "jpeg", ...
	      "gif", "pbm", "dxf", "mf", "svg", "hpgl", ...
	      "ps", "ps2", "psc", "psc2", "eps", "eps2", ...
	      "epsc", "epsc2", "emf", "pdf", "pslatex", ...
	      "epslatex", "epslatexstandalone", "pstex"};
    convertname = "";
    [idx, errmsg] = cellidx (dev_list, dev);
    if (! idx)
      if (! isempty (devopt))
        convertname = cstrcat (devopt, ":", name);
      else
        convertname = name;
      endif
      dev = "epsc";
      name = cstrcat (tmpnam, ".eps");
    endif

    if (strcmp (dev, "ps") || strcmp (dev, "ps2")
        || strcmp (dev, "psc")  || strcmp (dev, "psc2")
        || strcmp (dev, "epsc") || strcmp (dev, "epsc2")
        || strcmp (dev, "eps")  || strcmp (dev, "eps2")
        || strcmp (dev, "pstex")|| strcmp (dev, "pslatex")
        || strcmp (dev, "epslatex") || strcmp (dev, "epslatexstandalone"))

      ## Various postscript options
      if (strcmp (dev, "pstex")|| strcmp (dev, "pslatex")
	|| strcmp (dev, "epslatex"))
        termn = dev;
        options = "";
      elseif (strcmp (dev, "epslatexstandalone"))
        if (__gnuplot_has_feature__ ("epslatexstandalone_terminal"))
	termn = "epslatex";
	options = "standalone ";
        else
	error ("print: epslatexstandalone needs gnuplot 4.2 or higher");
        endif
      else
        if (dev(1) == "e")
	options = "eps ";
        else
	options = cstrcat (orientation, " ");
        endif
        termn = "postscript";
      endif
      
      if (any (dev == "c") || use_color > 0)
        if (force_solid < 0)
	  options = cstrcat (options, "color dashed ");
        else
	  options = cstrcat (options, "color solid ");
        endif
      else
        if (force_solid > 0)
	  options = cstrcat (options, "mono solid ");
        else
	  options = cstrcat (options, "mono dashed ");
        endif
      endif

      if (! isempty (font))
        options = cstrcat (options, "\"", font, "\" ");
      endif
      if (! isempty (fontsize))
        options = cstrcat (options, " ", fontsize);
      endif
      
      new_terminal = cstrcat (termn, " ", options);
      
    elseif (strcmp (dev, "aifm") || strcmp (dev, "corel"))
      ## Adobe Illustrator, CorelDraw
      if (use_color >= 0)
        options = " color";
      else
        options = " mono";
      endif
      if (! isempty (font))
        options = cstrcat (options, " \"", font, "\"");
      endif
      if (! isempty (fontsize))
        options = cstrcat (options, " ", fontsize);
      endif

      new_terminal = cstrcat (dev, " ", options);

    elseif (strcmp (dev, "fig"))
      ## XFig
      options = orientation;
      if (use_color >= 0)
        options = " color";
      else
        options = " mono";
      endif
      options = cstrcat (options, " ", special_flag);
      if (! isempty (fontsize))
        options = cstrcat (options, " fontsize ", fontsize);
      endif

      new_terminal = cstrcat ("fig ", options);

    elseif (strcmp (dev, "emf"))
      ## Enhanced Metafile format
      options = " ";
      if (use_color >= 0)
        options = " color";
      else
        options = " mono";
      endif
      if (force_solid >= 0)
        options = cstrcat (options, " solid");
      endif
      if (! isempty (font))
        options = cstrcat (options, " \"", font, "\"");
      endif
      if (! isempty (fontsize))
        options = cstrcat (options, " ", fontsize);
      endif

      new_terminal = cstrcat ("emf ", options);

    elseif (strcmp (dev, "png") || strcmp (dev, "gif")
	  || strcmp (dev, "jpg") || strcmp (dev, "jpeg")
	  || strcmp (dev, "pbm"))
      if (strcmp (dev, "jpg"))
        dev = "jpeg";
      endif
      ## Portable network graphics, PBMplus

      ## FIXME -- New PNG interface takes color as "xRRGGBB"
      ## where x is the literal character 'x' and 'RRGGBB' are the red,
      ## green and blue components in hex.  For now we just ignore it
      ## and use default.  The png terminal now is so rich with options,
      ## that one perhaps has to write a separate printpng.m function.
      ## DAS

      if (isempty (size) && isempty (resolution))
        options = " large";
      elseif (! isempty (size))
        options = cstrcat (" size ", size);
      else
	options = "";
      endif
      new_terminal = cstrcat (dev, options);

    elseif (strcmp (dev, "dxf") || strcmp (dev, "mf") || strcmp (dev, "hpgl"))
      ## AutoCad DXF, METAFONT, HPGL
      new_terminal = dev;

    elseif (strcmp (dev, "svg"))
      ## SVG
      options = "";
      if (! isempty (size))
        options = cstrcat (" size ", size);
      endif
      new_terminal = cstrcat ("svg", options);
      
    elseif (strcmp (dev, "pdf"))
      ## Portable Document format
      options = " ";
      if (use_color >= 0)
        options = "color";
      else
        options = "mono";
      endif
      if (force_solid > 0)
         options = cstrcat (options, " solid");
      elseif (force_solid < 0)
        options = cstrcat (options, " dashed");
      endif
      if (! isempty (font))
        options = cstrcat (options, "\"", font, "\" ");
      endif
      if (! isempty (fontsize))
        options = cstrcat (options, " ", fontsize);
      endif

      new_terminal = cstrcat ("pdf ", options);

    endif

    mono = use_color < 0;

    if (isempty (resolution))
      resolution = get (0, "screenpixelsperinch");
    else
      resolution = str2num (resolution);
    endif
    figure_properties = get (gcf);
    if (! isfield (figure_properties, "__pixels_per_inch__"))
      addproperty ("__pixels_per_inch__", gcf, "double", resolution);
    endif
    set (gcf, "__pixels_per_inch__", resolution)

    if (debug)
      drawnow (new_terminal, name, mono, debug_file);
    else
      drawnow (new_terminal, name, mono);
    endif

    if (! isempty (convertname))
      command = sprintf ("convert '%s' '%s'", name, convertname);
      [errcode, output] = system (command);
      unlink (name);
      if (errcode)
        error ("print: could not convert");
      endif
    endif

    ## FIXME -- This looks like a dirty, Unix-specific hack.
    ## DAS
    if (doprint)
      system (sprintf ("lpr %s '%s'", printer, printname));
      unlink (printname);
    endif

  unwind_protect_cleanup
    if (isfigure (old_fig))
      figure (old_fig)
    endif
  end_unwind_protect

endfunction