((= NBConvert Sphinx-Latex Template

Purpose: Allow export of PDF friendly Latex inspired by Sphinx.  Most of the
       template is derived directly from Sphinx source.

Inheritance: null>display_priority>latex_base 

Note: For best display, use latex syntax highlighting. =))

((*- extends 'display_priority.tplx' -*))

%==============================================================================
% Declarations
%==============================================================================

% In order to make sure that the input/output header follows the code it 
% preceeds, the needspace package is used to request that a certain
% amount of lines (specified by this variable) are reserved.  If those
% lines aren't available on the current page, the documenter will break
% to the next page and the header along with accomanying lines will be
% rendered together.  This value specifies the number of lines that
% the header will be forced to group with without a page break.
((*- set min_header_lines = 4 -*))

% This is the number of characters that are permitted per line.  It's
% important that this limit is set so characters do not run off the
% edges of latex pages (since latex does not always seem smart enough
% to prevent this in some cases.)  This is only applied to textual output
((* if resources.sphinx.outputstyle == 'simple' *))
    ((*- set wrap_size = 85 -*))
((* elif resources.sphinx.outputstyle == 'notebook' *))
    ((*- set wrap_size = 70 -*))
((* endif *))

%==============================================================================
% Header
%==============================================================================
((* block header *))

% Header, overrides base

    % Make sure that the sphinx doc style knows who it inherits from.
    \def\sphinxdocclass{(((parentdocumentclass)))}

    % Declare the document class
    \documentclass[letterpaper,10pt,english]{((( resources.sphinx.texinputs )))/sphinx(((documentclass)))}

    % Imports
    \usepackage[utf8]{inputenc}
    \DeclareUnicodeCharacter{00A0}{\\nobreakspace}
    \usepackage[T1]{fontenc}
    \usepackage{babel}
    \usepackage{times}
    \usepackage{import}
    \usepackage[((( resources.sphinx.chapterstyle )))]{((( resources.sphinx.texinputs )))/fncychap}
    \usepackage{longtable}
    \usepackage{((( resources.sphinx.texinputs )))/sphinx}
    \usepackage{multirow}

    \usepackage{amsmath}
    \usepackage{amssymb}
    \usepackage{ucs}
    \usepackage{enumerate}

    % Used to make the Input/Output rules follow around the contents.
    \usepackage{needspace}

    % Pygments requirements
    \usepackage{fancyvrb}
    \usepackage{color}

    % Needed to box output/input
    \usepackage{tikz}
        \usetikzlibrary{calc,arrows,shadows}
    \usepackage[framemethod=tikz]{mdframed}

    \usepackage{alltt}

    % Used to load and display graphics
    \usepackage{graphicx}
    \graphicspath{ {figs/} }
    \usepackage[Export]{adjustbox} % To resize


    % For formatting output while also word wrapping.
    \usepackage{listings}
    \lstset{breaklines=true}
    \lstset{basicstyle=\small\ttfamily}
    \def\smaller{\fontsize{9.5pt}{9.5pt}\selectfont}

    %Pygments definitions
    ((( resources.sphinx.pygment_definitions )))

    %Set pygments styles if needed...
    ((* if resources.sphinx.outputstyle == 'notebook' *))
        \definecolor{nbframe-border}{rgb}{0.867,0.867,0.867}
        \definecolor{nbframe-bg}{rgb}{0.969,0.969,0.969}
        \definecolor{nbframe-in-prompt}{rgb}{0.0,0.0,0.502}
        \definecolor{nbframe-out-prompt}{rgb}{0.545,0.0,0.0}

        \newenvironment{ColorVerbatim}
        {\begin{mdframed}[%
            roundcorner=1.0pt, %
            backgroundcolor=nbframe-bg, %
            userdefinedwidth=1\linewidth, %
            leftmargin=0.1\linewidth, %
            innerleftmargin=0pt, %
            innerrightmargin=0pt, %
            linecolor=nbframe-border, %
            linewidth=1pt, %
            usetwoside=false, %
            everyline=true, %
            innerlinewidth=3pt, %
            innerlinecolor=nbframe-bg, %
            middlelinewidth=1pt, %
            middlelinecolor=nbframe-bg, %
            outerlinewidth=0.5pt, %
            outerlinecolor=nbframe-border %
        ]}
        {\end{mdframed}}
        
        \newenvironment{InvisibleVerbatim}
        {\begin{mdframed}[leftmargin=0.1\linewidth,innerleftmargin=3pt,innerrightmargin=3pt, userdefinedwidth=1\linewidth, linewidth=0pt, linecolor=white, usetwoside=false]}
        {\end{mdframed}}

        \renewenvironment{Verbatim}[1][\unskip]
        {\begin{alltt}\smaller}
        {\end{alltt}}
    ((* endif *))

    % Help prevent overflowing lines due to urls and other hard-to-break 
    % entities.  This doesn't catch everything...
    \sloppy

    % Document level variables
    \title{((( nb.metadata.name | escape_tex )))}
    \date{((( nb.metadata._draft.date | escape_tex )))}
    \release{((( nb.metadata._draft.version | escape_tex )))}
    \author{((( nb.metadata._draft.author | escape_tex )))}
    \renewcommand{\releasename}{((( nb.metadata._draft.release | escape_tex )))}

    % TODO: Add option for the user to specify a logo for his/her export.
    \newcommand{\sphinxlogo}{}

    % Make the index page of the document.
    \makeindex

    % Import sphinx document type specifics.
    ((* block sphinxheader *))((* endblock sphinxheader *)) 
((* endblock header *))

%==============================================================================
% Body
%==============================================================================
((* block body *))
((* block bodyBegin *))
% Body

    % Start of the document
    \begin{document}

        ((* if resources.sphinx.header *))
            \maketitle
        ((* endif *))

        ((* block toc *))
            \tableofcontents 
        ((* endblock toc *))

        ((* endblock bodyBegin *))((( super() )))((* block bodyEnd *))

        \renewcommand{\indexname}{Index}
        \printindex

    % End of document
    \end{document}
((* endblock bodyEnd *))
((* endblock body *))

%==============================================================================
% Footer
%==============================================================================
((* block footer *))
((* endblock footer *))

%==============================================================================
% Headings
%
% Purpose: Format pynb headers as sphinx headers.  Depending on the Sphinx
%          style that is active, this will change.  Thus sphinx styles will
%          override the values here.
%==============================================================================
((* block headingcell -*))
    \
    ((*- if cell.level == 1 -*))
        ((* block h1 -*))part((* endblock h1 -*))
    ((*- elif cell.level == 2 -*))
        ((* block h2 -*))chapter((* endblock h2 -*))
    ((*- elif cell.level == 3 -*))
        ((* block h3 -*))section((* endblock h3 -*))
    ((*- elif cell.level == 4 -*))
        ((* block h4 -*))subsection((* endblock h4 -*))
    ((*- elif cell.level == 5 -*))
        ((* block h5 -*))subsubsection((* endblock h5 -*))
    ((*- elif cell.level == 6 -*))
        ((* block h6 -*))paragraph((* endblock h6 -*))

    ((= It's important to make sure that underscores (which tend to be common
    in IPYNB file titles) do not make their way into latex.  Sometimes this
    causes latex to barf. =))
    ((*- endif -*)){((( escape_underscores(cell.source | markdown2latex ) )))}
((*- endblock headingcell *))

%==============================================================================
% Markdown
%
% Purpose: Convert markdown to latex.  Here markdown2latex is explicitly
%          called since we know we want latex output.
%==============================================================================
((*- block markdowncell scoped-*))
    ((( cell.source | markdown2latex )))
((*- endblock markdowncell -*))

%==============================================================================
% Rawcell
%
% Purpose: Raw text cells allow the user to manually inject document code that 
%          will not get touched by the templating system.
%==============================================================================
((*- block rawcell *))
    ((( cell.source | wrap(wrap_size) )))
((* endblock rawcell -*))

%==============================================================================
% Unknowncell
%
% Purpose: This is the catch anything unhandled.  To display this data, we
%          remove all possible latex conflicts and wrap the characters so they
%          can't flow off of the page.
%==============================================================================
((* block unknowncell scoped*))

    % Unsupported cell type, no formatting
    ((( cell.source | wrap | escape_tex )))
((* endblock unknowncell *))

%==============================================================================
% Input
%==============================================================================
((* block input *))

    % Make sure that atleast 4 lines are below the HR
    \needspace{((( min_header_lines )))\baselineskip}

    ((* if resources.sphinx.outputstyle == 'simple' *))

        % Add a horizantal break, along with break title.
        \vspace{10pt}
        {\scriptsize Input}\\*
        \rule[10pt]{\linewidth}{0.5pt}
        \vspace{-25pt}

        % Add contents below.
        ((( cell.input | highlight )))

    ((* elif resources.sphinx.outputstyle == 'notebook' *))
        \vspace{6pt}
        ((( write_prompt("In", cell.prompt_number, "nbframe-in-prompt") )))
        \vspace{-2.65\baselineskip}
        \begin{ColorVerbatim}
            \vspace{-0.7\baselineskip}
            ((( cell.input | highlight )))
            ((* if cell.input == None or cell.input == '' *))
                \vspace{0.3\baselineskip}
            ((* else *))
                \vspace{-0.2\baselineskip}
            ((* endif *))
        \end{ColorVerbatim}
    ((* endif *))
((* endblock input *))

%==============================================================================
% Output_Group
%
% Purpose: Make sure that only one header bar only attaches to the output 
%          once.  By keeping track of when an input group is started
%==============================================================================
((* block output_group *))
    ((* if cell.outputs.__len__() > 0 *))
        ((* if resources.sphinx.outputstyle == 'simple' *))

            % If the first block is an image, minipage the image.  Else
            % request a certain amount of space for the input text.
            ((( iff_figure(cell.outputs[0], "\\begin{minipage}{1.0\\textwidth}", "\\needspace{"  ~ min_header_lines ~ "\\baselineskip}") )))

            % Add a horizantal break, along with break title.
            \vspace{10pt}
            {\scriptsize Output}\\*
            \rule[10pt]{\linewidth}{0.5pt}
            \vspace{-20pt}

            % Add the contents of the first block.
            ((( render_output(cell.outputs[0]) )))

            % Close the minipage.
            ((( iff_figure(cell.outputs[0], "\\end{minipage}", "") )))

            % Add remainer of the document contents below.
            ((* for output in cell.outputs[1:] *))
                ((( render_output(output, cell.prompt_number) )))
            ((* endfor *))
        ((* elif resources.sphinx.outputstyle == 'notebook' *))

            % Add document contents.
            ((* for output in cell.outputs *))
                ((( render_output(output, cell.prompt_number) )))
            ((* endfor *))
        ((* endif *))
    ((* endif *))
((* endblock *))

%==============================================================================
% Additional formating
%==============================================================================
((* block data_text *))
    ((( custom_verbatim(output.text) )))
((* endblock *))

((* block traceback_line *))
    ((( conditionally_center_output(line | indent| rm_ansi) )))
((* endblock traceback_line *))

%==============================================================================
% Supported image formats
%==============================================================================
((*- block data_png -*))
    ((( conditionally_center_output(insert_graphics(output.key_png)) )))
((*- endblock -*))

((*- block data_svg -*))
    ((( conditionally_center_output(insert_graphics(output.key_svg)) )))
((*- endblock -*))

((*- block data_latex *))
    ((* if resources.sphinx.centeroutput *))\begin{center}((* endif -*))((( output.latex | rm_math_space )))((*- if resources.sphinx.centeroutput *))\end{center} ((* endif -*))
((*- endblock -*))

%==============================================================================
% Support Macros
%==============================================================================

% Name: write_prompt
% Purpose: Renders an output/input prompt for notebook style pdfs
((* macro write_prompt(prompt, number, color) -*))
    \makebox[0.1\linewidth]{\smaller\hfill\tt\color{((( color )))}((( prompt )))\hspace{4pt}{[}((( number ))){]}:\hspace{4pt}}\\*
((*- endmacro *))

% Name: render_output
% Purpose: Renders an output block appropriately.
((* macro render_output(output, prompt_number) -*))
    ((*- if output.output_type == 'pyerr' -*))
        ((*- block pyerr scoped *))
            ((( custom_verbatim(super()) )))
        ((* endblock pyerr -*))
    ((*- else -*))

        ((* if resources.sphinx.outputstyle == 'notebook' *))
            ((*- if output.output_type == 'pyout' -*))
                ((( write_prompt("Out", prompt_number, "nbframe-out-prompt") )))
                \vspace{-2.55\baselineskip}
            ((*- endif -*))

            \begin{InvisibleVerbatim}
                \vspace{-0.5\baselineskip}
        ((*- endif -*))

        ((*- block display_data scoped -*))
            ((( super() )))
        ((*- endblock display_data -*))

        ((* if resources.sphinx.outputstyle == 'notebook' *))
            \end{InvisibleVerbatim}
        ((*- endif -*))
    ((*- endif -*))
((*- endmacro *))

% Name: iff_figure
% Purpose: If the output block provided is a figure type, the 'true_content'
%          parameter will be returned.  Else, the 'false_content'. 
((* macro iff_figure(output, true_content, false_content) -*))
    ((*- set is_figure = false -*))
    ((*- for type in output | filter_data_type -*))
        ((*- if type in ['pdf', 'svg', 'png', 'jpeg','html']*))
            ((*- set is_figure = true -*))
        ((*- endif -*))
    ((*- endfor -*))
    
    ((* if is_figure -*))
        ((( true_content )))
    ((*- else -*))
        ((( false_content )))
    ((*- endif *))
((*- endmacro *))

% Name: custom_verbatim
% Purpose: This macro creates a verbatim style block that fits the existing
%          sphinx style more readily than standard verbatim blocks.
((* macro custom_verbatim(text) -*))
    \begin{alltt}
    ((*- if resources.sphinx.centeroutput *))\begin{center} ((* endif -*))
((( text | wrap(wrap_size) )))
    ((*- if resources.sphinx.centeroutput *))\end{center}((* endif -*))
    \end{alltt}
((*- endmacro *))

% Name: conditionally_center_output
% Purpose: This macro centers the output if the output centering is enabled.
((* macro conditionally_center_output(text) -*))
    ((* if resources.sphinx.centeroutput *)){\centering ((* endif *))((( text )))((* if resources.sphinx.centeroutput *))}((* endif *))
((*- endmacro *))

% Name: insert_graphics
% Purpose: This macro will insert an image in the latex document given a path.
((* macro insert_graphics(path) -*))
    \begin{center}
    \includegraphics[max size={\textwidth}{\textheight}]{(((path)))}
    \par
    \end{center}
((*- endmacro *))

% Name: escape_underscores
% Purpose: Underscores cause a problem in latex.  It's important that we 
%          escape any underscores that appear.
((* macro escape_underscores(text) -*))
    ((*- set text = text|replace("_","\\_") -*))
    ((( text )))
((*- endmacro *))