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## Copyright (C) 2009-2012 S�ren Hauberg
##
## 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} {[@var{retval}, @var{status}] =} __makeinfo__ (@var{text}, @var{output_type})
## @deftypefnx {Function File} {[@var{retval}, @var{status}] =} __makeinfo__ (@var{text}, @var{output_type}, @var{see_also})
## Undocumented internal function.
## @end deftypefn
## Run @code{makeinfo} on a given text.
##
## The string @var{text} is run through the @code{__makeinfo__} program
## to generate output in various formats. This string must contain valid
## Texinfo formatted text.
##
## The @var{output_type} selects the format of the output. This can be either
## @t{"html"}, @t{"texinfo"}, or @t{"plain text"}. By default this is
## @t{"plain text"}. If @var{output_type} is @t{"texinfo"}, the @t{@@seealso}
## macro is expanded, but otherwise the text is unaltered.
##
## If the optional argument @var{see_also} is present, it is used to expand the
## Octave specific @t{@@seealso} macro. This argument must be a function handle,
## that accepts a cell array of strings as input argument (each elements of the
## array corresponds to the arguments to the @t{@@seealso} macro), and return
## the expanded string. If this argument is not given, the @t{@@seealso} macro
## will be expanded to the text
##
## @example
## See also: arg1, arg2, ...
## @end example
##
## @noindent
## for @t{"plain text"} output, and
##
## @example
## See also: @@ref@{arg1@}, @@ref@{arg2@}, ...
## @end example
##
## @noindent
## otherwise.
##
## The optional output argument @var{status} contains the exit status of the
## @code{makeinfo} program as returned by @code{system}.
function [retval, status] = __makeinfo__ (text, output_type = "plain text", fsee_also)
## Check input
if (nargin < 1 || nargin > 3)
print_usage ();
endif
if (! ischar (text))
error ("__makeinfo__: first input argument must be a string");
endif
if (! ischar (output_type))
error ("__makeinfo__: second input argument must be a string");
endif
if (nargin < 3)
if (strcmpi (output_type, "plain text"))
fsee_also = @(T) strcat ...
("\nSee also:", sprintf (" %s,", T{:})(1:end-1), "\n");
else
fsee_also = @(T) strcat ...
("\nSee also:", sprintf (" @ref{%s},", T{:})(1:end-1), "\n");
endif
endif
if (! isa (fsee_also, "function_handle"))
error ("__makeinfo__: third input argument must be a function handle");
endif
## It seems like makeinfo sometimes gets angry if the first character
## on a line is a space, so we remove these.
text = strrep (text, "\n ", "\n");
## Handle @seealso macro
see_also_pat = '@seealso *\{(.*)\}';
args = regexp (text, see_also_pat, 'tokens');
for ii = 1:numel (args)
expanded = fsee_also (strtrim (strsplit (args{ii}{:}, ',', true)));
text = regexprep (text, see_also_pat, expanded, 'once');
endfor
## Handle @nospell macro
text = regexprep (text, '@nospell *\{([^}]*)\}', "$1");
## Handle @xcode macro
text = regexprep (text, '@xcode *\{([^}]*)\}', "$1");
if (strcmpi (output_type, "texinfo"))
status = 0;
retval = text;
return;
endif
## Create the final TeXinfo input string
text = sprintf ("\\input texinfo\n\n%s\n\n@bye\n", text);
unwind_protect
## Write Texinfo to tmp file
template = "octave-help-XXXXXX";
[fid, name] = mkstemp (fullfile (P_tmpdir, template), true);
if (fid < 0)
error ("__makeinfo__: could not create temporary file");
endif
fprintf (fid, "%s", text);
fclose (fid);
## Take action depending on output type
switch (lower (output_type))
case "plain text"
cmd = sprintf ("%s --no-headers --no-warn --force --no-validate %s",
makeinfo_program (), name);
case "html"
cmd = sprintf ("%s --no-headers --html --no-warn --no-validate --force %s",
makeinfo_program (), name);
otherwise
error ("__makeinfo__: unsupported output type: '%s'", output_type);
endswitch
## Call makeinfo
[status, retval] = system (cmd);
unwind_protect_cleanup
if (exist (name, "file"))
delete (name);
endif
end_unwind_protect
endfunction
## No test needed for internal helper function.
%!assert (1)
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