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248 jpm 1 
<?php
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/**
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*
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* Formats parsed Text_Wiki for LaTeX rendering.
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*
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* $Id: Latex.php,v 1.1 2005-01-20 19:44:30 jpm Exp $
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*
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* @author Jeremy Cowgar <jeremy@cowgar.com>
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*
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* @package Text_Wiki
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*
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* @todo [http://google.com] becomes 1 with a LaTeX footnote in subscript.
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*       This should be a normal LaTeX footnote associated with the
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*       previous word?
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*
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* @todo parse "..." to be ``...''
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*
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* @todo parse '...' to be `...'
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*
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* @todo move escape_latex to a static function, move escaping to the
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*       individual .php files they are associated with
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*
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* @todo allow the user to add conf items to do things like
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*       + A custom document header
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*       + Custom page headings
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*       + Include packages
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*       + Set Title, Author, Date
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*       + Include a title page
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*       + Not output Document Head/Foot (maybe combinding many pages?)
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*
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*/
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class Text_Wiki_Render_Latex extends Text_Wiki_Render {
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    function escape_latex ($txt) {
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        $txt = str_replace("\\", "\\\\", $txt);
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        $txt = str_replace('#', '\#', $txt);
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        $txt = str_replace('$', '\$', $txt);
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        $txt = str_replace('%', '\%', $txt);
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        $txt = str_replace('^', '\^', $txt);
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        $txt = str_replace('&', '\&', $txt);
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        $txt = str_replace('_', '\_', $txt);
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        $txt = str_replace('{', '\{', $txt);
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        $txt = str_replace('}', '\}', $txt);
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        // Typeset things a bit prettier than normas
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        $txt = str_replace('~',   '$\sim$', $txt);
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        $txt = str_replace('...', '\ldots', $txt);
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        return $txt;
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    }
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    function escape($tok, $ele) {
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        if (isset($tok[$ele])) {
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            $tok[$ele] = $this->escape_latex($tok[$ele]);
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        }
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        return $tok;
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    }
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    function pre()
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    {
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        foreach ($this->wiki->tokens as $k => $tok) {
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            if ($tok[0] == 'Code') {
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                continue;
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            }
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            $tok[1] = $this->escape($tok[1], 'text');
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            $tok[1] = $this->escape($tok[1], 'page');
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            $tok[1] = $this->escape($tok[1], 'href');
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            $this->wiki->tokens[$k] = $tok;
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        }
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        $this->wiki->source = $this->escape_latex($this->wiki->source);
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        return
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            "\\documentclass{article}\n".
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            "\\usepackage{ulem}\n".
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            "\\pagestyle{headings}\n".
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            "\\begin{document}\n";
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    }
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    function post()
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    {
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        return "\\end{document}\n";
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    }
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}
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?>