function spm_make_manual(c)
% Convert a job configuration tree into a series of LaTeX documents
%__________________________________________________________________________
% Copyright (C) 2005-2017 Wellcome Trust Centre for Neuroimaging

% John Ashburner
% $Id: spm_make_manual.m 7019 2017-02-16 10:49:48Z guillaume $


if ~nargin, c = spm_cfg; end
if nargin && ischar(c), clean_latex_compile; return; end

cd(fullfile(spm('Dir'),'man'));

fp = fopen('spm_manual.tex','w');
fprintf(fp,'\\documentclass[a4paper,titlepage]{book}\n');
fprintf(fp,'\\usepackage{epsfig,amsmath,pifont,moreverb,minitoc}\n');
fprintf(fp,'%s\n%s\n%s\n%s\n%s\n%s\n%s\n',...
    '\usepackage[colorlinks=true,',...
    'pdfpagemode=UseOutlines,',...
    'pdftitle={SPM Manual},','pdfauthor={The SPM Team},',...
    'pdfsubject={Statistical Parametric Mapping},',...
    'pdfkeywords={neuroimaging, MRI, PET, EEG, MEG, SPM}',...
    ']{hyperref}');

fprintf(fp,'\\pagestyle{headings}\n\\bibliographystyle{plain}\n\n');
fprintf(fp,'\\hoffset=15mm\n\\voffset=-5mm\n');
fprintf(fp,'\\oddsidemargin=0mm\n\\evensidemargin=0mm\n\\topmargin=0mm\n');
fprintf(fp,'\\headheight=12pt\n\\headsep=10mm\n\\textheight=240mm\n\\textwidth=148mm\n');
fprintf(fp,'\\marginparsep=5mm\n\\marginparwidth=21mm\n\\footskip=10mm\n\n');

fprintf(fp,'\\title{\\huge{SPM Manual}}\n');
fprintf(fp,'\\author{The FIL Methods Group (and honorary members)}\n');
fprintf(fp,'\\begin{document}\n');
fprintf(fp,'\\maketitle\n');
fprintf(fp,'\\dominitoc\\tableofcontents\n\n');
fprintf(fp,'\\newpage\n\\section*{The SPM User Interface}\n');
write_help(c,fp);
for i=1:numel(c.values)
   % this is always false, and each cfg_item has a tag
   %if isfield(c.values{i},'tag')
       part(c.values{i},fp);
   %end
end
%fprintf(fp,'\\parskip=0mm\n\\bibliography{methods_macros,methods_group,external}\n\\end{document}\n\n');
fprintf(fp,'\\parskip=0mm\n');
bibcstr = get_bib(fullfile(spm('dir'),'man','biblio'));

tbxlist = dir(fullfile(spm('dir'),'toolbox'));
for k = 1:numel(tbxlist)
    if tbxlist(k).isdir
        bibcstr=[bibcstr(:); get_bib(fullfile(spm('dir'),'toolbox', ...
                 tbxlist(k).name))];
    end
end
bibcstr = strcat(bibcstr,',');
bibstr  = strcat(bibcstr{:});
fprintf(fp,'\\bibliography{%s}\n',bibstr(1:end-1));
fprintf(fp,'\\end{document}\n\n');
fclose(fp);


%==========================================================================
function part(c,fp)
% this is always false, and each cfg_item has a tag
%if isstruct(c) && isfield(c,'tag')
    fprintf(fp,'\\part{%s}\n',texify(c.name));
    % write_help(c,fp);
    if isa(c,'cfg_repeat')||isa(c,'cfg_choice')||isa(c,'cfg_menu')
        for i=1:numel(c.values)
            %if isfield(c.values{i},'tag')
                fprintf(fp,'\\include{%s}\n',c.values{i}.tag);
                chapter(c.values{i});
            %end
        end
    end
    %if isfield(c,'val')
        for i=1:numel(c.val)
            if isfield(c.val{i},'tag')
                if chapter(c.val{i})
                    fprintf(fp,'\\include{%s}\n',c.val{i}.tag);
                end
            end
        end
    %end
%end


%==========================================================================
function sts = chapter(c)
bn = c.tag;
if strcmp(bn,'preproc') && ~isempty(strfind(c.help{1},'M/EEG'))
    bn = ['MEEG_' bn]; % fix for name clash with other 'preproc'
end
fp = fopen([bn '.tex'],'w');
if fp==-1, sts = false; return; end

fprintf(fp,'\\chapter{%s  \\label{Chap:%s}}\n\\minitoc\n\n\\vskip 1.5cm\n\n',texify(c.name),c.tag);
write_help(c,fp);

switch class(c)
    case {'cfg_branch','cfg_exbranch'}
        for i=1:numel(c.val)
            section(c.val{i},fp);
        end
    case {'cfg_repeat','cfg_choice'}
        for i=1:numel(c.values)
            section(c.values{i},fp);
        end
end
fclose(fp);
sts = true;


%==========================================================================
function section(c,fp,lev)
if nargin<3, lev = 1; end
sec = {'section','subsection','subsubsection','paragraph','subparagraph','textbf','textsc','textsl','textit'};
if lev<=length(sec)
    fprintf(fp,'\n\\%s{%s}\n',sec{lev},texify(c.name));
    write_help(c,fp);
    switch class(c)
        case {'cfg_branch','cfg_exbranch'}
            for i=1:numel(c.val)
                if strcmp(c.name,'Inverse') && strcmp(c.val{i}.name,'Composition')
                    % Remove recursion in Util > Deformations
                    continue;
                end
                section(c.val{i},fp,lev+1);
            end
        case {'cfg_repeat','cfg_choice'}
            for i=1:numel(c.values)
                if strcmp(c.name,'Composition') && strcmp(c.values{i}.name,'Composition')
                    % Remove recursion in Util > Deformations
                    continue;
                end
                section(c.values{i},fp,lev+1);
            end
    end
else
    warning(['Too many nested levels... ' c.name]);
end


%==========================================================================
function write_help(hlp,fp)
if isa(hlp, 'cfg_item')
    if ~isempty(hlp.help)
       hlp = hlp.help;
    else
        return;
    end
end
if iscell(hlp)
    for i=1:numel(hlp)
        write_help(hlp{i},fp);
    end
    return;
end
str = texify(hlp);
fprintf(fp,'%s\n\n',str);


%==========================================================================
function str = texify(str0)
st1  = strfind(str0,'/*');
en1  = strfind(str0,'*/');
st = [];
en = [];
for i=1:numel(st1)
    en1  = en1(en1>st1(i));
    if ~isempty(en1)
        st  = [st st1(i)];
        en  = [en en1(1)];
        en1 = en1(2:end);
    end
end

str = '';
pen = 1;
for i=1:numel(st)
    str = [str clean_latex(str0(pen:st(i)-1)) str0(st(i)+2:en(i)-1)];
    pen = en(i)+2;
end
str = [str clean_latex(str0(pen:numel(str0)))];


%==========================================================================
function str = clean_latex(str)
str  = strrep(str,'$','\$');
str  = strrep(str,'&','\&');
str  = strrep(str,'^','\^');
str  = strrep(str,'_','\_');
str  = strrep(str,'#','\#');
%str  = strrep(str,'\','$\\$');
str  = strrep(str,'|','$|$');
str  = strrep(str,'>','$>$');
str  = strrep(str,'<','$<$');


%==========================================================================
function bibcstr = get_bib(bibdir)
biblist = dir(fullfile(bibdir,'*.bib'));
bibcstr = {};
for k = 1:numel(biblist)
    n          = spm_file(biblist(k).name,'basename');
    bibcstr{k} = fullfile(bibdir,n);
end


%==========================================================================
function clean_latex_compile
p = fullfile(spm('Dir'),'man');
[f, d] = spm_select('FPlist',p,'.*\.aux$');
f = strvcat(f, spm_select('FPlist',p,'.*\.tex$'));
f = strvcat(f, spm_select('FPlist',p,'^manual\..*$'));
f(strcmp(cellstr(f),fullfile(spm('Dir'),'man','manual.tex')),:) = [];
f(strcmp(cellstr(f),fullfile(spm('Dir'),'man','manual.pdf')),:) = [];
for i=1:size(d,1)
    f = strvcat(f, spm_select('FPlist',deblank(d(i,:)),'.*\.aux$'));
end
f(strcmp(cellstr(f),filesep),:) = [];
disp(f); pause
for i=1:size(f,1)
    spm_unlink(deblank(f(i,:)));
end