xref: /plugin/siteexport/inc/pdfgenerator.php (revision c14be697195c95a5be429a69fd37e1bee567a81b)

<?php

if(!defined('DOKU_PLUGIN')) die('meh');

if ( !empty($_REQUEST['pdfExport']) && intval($_REQUEST['pdfExport']) == 1 && file_exists(DOKU_PLUGIN . 'dw2pdf/mpdf/mpdf.php') ) {

    require_once(DOKU_PLUGIN . 'siteexport/inc/mpdf.php');
    class siteexport_pdfgenerator
    {
        private $functions;

        public function siteexport_pdfgenerator( $functions=null )
        {
            $this->functions = $functions;
        }

        function createPDFFromFile($filename, &$NAME) {

            if ( !preg_match("/" . $this->settings->fileType . "$/", $NAME) ) {
                $this->functions->debug->message("Filetype {$this->settings->fileType} did not match filename '$NAME'", null, 4);
                return false;
            }

            $mpdf = new siteexportPDF($this->functions->debug);

            if ( !$mpdf ) {
                $this->functions->debug->message("Could not instantiate MPDF", null, 4);
                return false;
            }

            $html = file_get_contents($filename);

            if ( !strstr($html, "<html") ) {
                $this->functions->debug->message("Filecontent had no HTML starting tag", null, 4);
                return false;
            }

            // Save HTML too
            $this->functions->debug->message("Arranging HTML", null, 2);
            $this->arrangeHtml($html, 'bl,acronym');
            $this->functions->debug->message("Done arranging HTML:", $html, 1);

            $mpdf->debug = false;
            $mpdf->list_indent_first_level = 1; // Indents the first level of lists.
            //$mpdf->SetBasePath("/");
            $mpdf->usepre = false;
            $mpdf->margin_bottom_collapse = true;
            $mpdf->SetDisplayMode('fullpage');
            $mpdf->restoreBlockPageBreaks = true;
            $this->img_dpi = 300;

            $mpdf->setBasePath(empty($this->functions->settings->depth) ? './' : $this->functions->settings->depth);
            $mpdf->SetAutoFont(AUTOFONT_ALL);

            $mpdf->ignore_invalid_utf8 = true;
            $mpdf->mirrorMargins = 0;	// don't mirror margins

            $mpdf->WriteHTML($html);
            $mpdf->Output($filename, "F");

            $this->functions->debug->message("Used images:", $mpdf->images, 1);
            $this->functions->debug->message("Failed images:", $mpdf->failedimages, 1);

            return true;
        }

        function arrangeHtml(&$html, $norendertags = '' )
        {
            global $conf;

            // add bookmark links
            $html = preg_replace_callback("/<h(\d)(.*?)>(.+?)<\/h\\1>/s", array($this, '__pdfHeaderCallback'), $html);
            $html = preg_replace_callback("/<\/div>\s*?<h({$conf['plugin']['siteexport']['PDFHeaderPagebreak']})(.*?)>/s", array($this, '__pdfHeaderCallbackPagebreak'), $html);
            $html = preg_replace("/(<img.*?mediacenter.*?\/>)/", "<table style=\"width:100%; border: 0px solid #000;\"><tr><td style=\"text-align: center\">$1</td></tr></table>", $html);
            $html = preg_replace("/<p>(\s*?<table.*?<\/table>\s*?)<\/p>/s", "$1", $html);
            $html = preg_replace_callback("/<pre(.*?)>(.*?)<\/pre>/s", array($this, '__pdfPreCodeCallback'), $html);
            $html = preg_replace_callback("/<a href=\"mailto:(.*?)\".*?>(.*?)<\/a>/s", array($this, '__pdfMailtoCallback'), $html);
            /**/

            $standardReplacer = array (
            // insert a pagebreak for support of WRAP and PAGEBREAK plugins
        							'<br style="page-break-after:always;">' => '<pagebreak />',
                                    '<div class="wrap_pagebreak"></div>' => '<pagebreak />',
                                    '<sup>' => '<sup class="sup">',
                                    '<sub>' => '<sub class="sub">',
                                    '<code>' => '<code class="code">'
            );
            $html = str_replace(array_keys($standardReplacer), array_values($standardReplacer), $html);

            // thanks to Jared Ong
            // Customized to strip all span tags so that the wiki <code> SQL would display properly
            $norender = explode(',',$norendertags);
            $html = $this->strip_only($html, $norender ); //array('span','acronym'));
            $html = $this->strip_htmlencodedchars($html);
            // Customized to strip all span tags so that the wiki <code> SQL would display properly
        }

        private function __pdfMailtoCallback($DATA) {
            if ( $DATA[1] == $DATA[2] ) {
                $DATA[2] = $this->deobfuscate($DATA[2]);
            }
            $DATA[1] = $this->deobfuscate($DATA[1]);
            return "<a href=\"mailto:{$DATA[1]}\">{$DATA[2]}</a>";
        }

        private function __pdfPreCodeCallback($DATA) {

            $code = nl2br($DATA[2]);
            $code = preg_replace_callback("/(^|<br \/>)(\s+)(\S)/s", array($this, '__pdfPreWhitespacesCallback'), $code);

            return "\n<pre" . $DATA[1] . ">\n" . $code . "\n</pre>\n";
        }

        private function __pdfPreWhitespacesCallback( $DATA ) {
            return $DATA[1] . "\n" . str_repeat("&nbsp;", strlen($DATA[2])-($DATA[2]{0}=="\n"?1:0) ) . $DATA[3];
        }

        private function __pdfHeaderCallback($DATA) {
            //*
            $contentText = preg_replace("/<\/?.*?>/s", '', $DATA[3]); // 2014-07-23 Do not encode again.
            /*/
            $contentText = $this->xmlEntities(preg_replace("/<\/?.*?>/s", '', $DATA[3])); // Double encoding - has to be decoded in mpdf once more.
            //*/
            return '<tocentry content="' . $contentText . '" level="' . ($DATA[1]-1) . '" /><bookmark content="' . $contentText . '" level="' . ($DATA[1]-1) . '" /><h' . $DATA[1] . $DATA[2] . '>' . $DATA[3] . '</h' . $DATA[1] . '>';
        }

        private function __pdfHeaderCallbackPagebreak($DATA) {
            return '</div>' . "\r\n" . '<pagebreak />' . "\r\n\r\n" . '<h' . $DATA[1] . $DATA[2] . '>';
        }
        // thanks to Jared Ong
        // Custom function for help in stripping span tags
        private function strip_only($str, $tags) {
            if(!is_array($tags)) {
                $tags = (strpos($str, '>') !== false ? explode('>', str_replace('<', '', $tags)) : array($tags));
                if(end($tags) == '') array_pop($tags);
            }

            foreach($tags as $tag) $str = preg_replace('#</?'.$tag.'[^>]*>#is', '', $str);
            return $str;
        }
        // Custom function for help in stripping span tags

        // Custom function for help in replacing &#039; &quot; &gt; &lt; &amp;
        private function strip_htmlencodedchars($str) {
            $str = str_replace('&#039;', '\'', $str);
            //        $str = str_replace('&quot;', '"', $str);
            //        $str = str_replace('&gt;', '>', $str);
            //        $str = str_replace('&lt;', '<', $str);
            //        $str = str_replace('&amp;', '&', $str);
            return $str;
        }
        // Custom function for help in replacing &#039; &quot; &gt; &lt; &amp;

        /**
         * return an de-obfuscated email address in line with $conf['mailguard'] setting
         */
        private function deobfuscate($email) {
            global $conf;

            switch ($conf['mailguard']) {
                case 'visible' :
                    $obfuscate = array(' [at] ' => '@', ' [dot] ' => '.', ' [dash] ' => '-');
                    return strtr($email, $obfuscate);

                case 'hex' :
                    $encode = '';
                    $len = strlen($email);
                    for ($x=0; $x < $len; $x+=6){
                        $encode .= chr(hexdec($email{$x+3}.$email{($x+4)}));
                    }
                    return $encode;

                case 'none' :
                default :
                    return $email;
            }
        }

        /**
         * Encoding ()taken from DW - but without needing the renderer
         **/
        private function xmlEntities($string) {
            return htmlspecialchars($string,ENT_QUOTES,'UTF-8');
        }
    }
}
?>