class.ilPCSourceCode.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once("./Services/COPage/classes/class.ilPCParagraph.php");

class ilPCSourceCode extends ilPCParagraph
{
        function init()
        {
                $this->setType("src");
        }
        
        static function getLangVars()
        {
                return array("ed_insert_code", "pc_code");
        }

        function modifyPageContentPostXsl($a_output, $outputmode = "presentation")
        {
                $dom = $this->getPage()->getDom();

                $xpc = xpath_new_context($dom);
                $path = "//Paragraph"; //"[@Characteristic = 'Code']";
                $res = & xpath_eval($xpc, $path);
                for($i = 0; $i < count($res->nodeset); $i++)
                {
                        $context_node = $res->nodeset[$i];
                        $char = $context_node->get_attribute('Characteristic');

                        if ($char != "Code")
                                continue;

                        $n = $context_node->parent_node();
                        $char = $context_node->get_attribute('Characteristic');
                        $subchar = $context_node->get_attribute('SubCharacteristic');
                        $showlinenumbers = $context_node->get_attribute('ShowLineNumbers');
                        $downloadtitle = $context_node->get_attribute('DownloadTitle');
                        $autoindent = $context_node->get_attribute('AutoIndent');

                        $content = "";

                        // get XML Content
                        $childs = $context_node->child_nodes();

                        for($j=0; $j<count($childs); $j++)
                        {
                                $content .= $dom->dump_node($childs[$j]);
                        }

                        while ($context_node->has_child_nodes ())
                        {
                                $node_del = $context_node->first_child ();
                                $context_node->remove_child ($node_del);
                        }

                        $content = str_replace("<br />", "<br/>", utf8_decode($content) );
                        $content = str_replace("<br/>", "\n", $content);
                        $rownums = count(split ("\n",$content));

                        $plain_content = html_entity_decode($content);
                        $plain_content = preg_replace ("/\&#x([1-9a-f]{2});?/ise","chr (base_convert (\\1, 16, 10))",$plain_content);
                        $plain_content = preg_replace ("/\&#(\d+);?/ise","chr (\\1)",$plain_content);
                        $content = utf8_encode($this->highlightText($plain_content, $subchar, $autoindent));

                        $content = str_replace("&amp;lt;", "&lt;", $content);
                        $content = str_replace("&amp;gt;", "&gt;", $content);
//                      $content = str_replace("&", "&amp;", $content);
//var_dump($content);
                        $rows    = "<tr valign=\"top\">";
                        $rownumbers = "";
                        $linenumbers= "";

                        //if we have to show line numbers
                        if (strcmp($showlinenumbers,"y")==0)
                        {
                                $linenumbers = "<td nowrap=\"nowrap\" class=\"ilc_LineNumbers\" >";
                                $linenumbers .= "<pre class=\"ilc_Code\">";

                                for ($j=0; $j < $rownums; $j++)
                                {
                                        $indentno      = strlen($rownums) - strlen($j+1) + 2;
                                        $rownumeration = ($j+1);
                                        $linenumbers   .= "<span class=\"ilc_LineNumber\">$rownumeration</span>";
                                        if ($j < $rownums-1)
                                        {
                                                $linenumbers .= "\n";
                                        }
                                }
                                $linenumbers .= "</pre>";
                                $linenumbers .= "</td>";
                        }

                        $rows .= $linenumbers."<td class=\"ilc_Sourcecode\"><pre class=\"ilc_Code\">".$content."</pre></td>";
                        $rows .= "</tr>";

                        // fix for ie explorer which is not able to produce empty line feeds with <br /><br />;
                        // workaround: add a space after each br.
                        $newcontent = str_replace("\n", "<br/>",$rows);
                        // fix for IE
                        $newcontent = str_replace("<br/><br/>", "<br/> <br/>",$newcontent);
                        // falls drei hintereinander...
                        $newcontent = str_replace("<br/><br/>", "<br/> <br/>",$newcontent);

                        // workaround for preventing template engine
                        // from hiding paragraph text that is enclosed
                        // in curly brackets (e.g. "{a}", see ilLMEditorGUI::executeCommand())
                        $newcontent = str_replace("{", "&#123;", $newcontent);
                        $newcontent = str_replace("}", "&#125;", $newcontent);

//echo htmlentities($newcontent);
                        $a_output = str_replace("[[[[[Code;".($i + 1)."]]]]]", $newcontent, $a_output);

                        if ($outputmode != "presentation" && is_object($this->getPage()->getOfflineHandler())
                                && trim($downloadtitle) != "")
                        {
                                // call code handler for offline versions
                                $this->getPage()->getOfflineHandler()->handleCodeParagraph($this->getPage()->getId(), $i + 1, $downloadtitle, $plain_content);
                        }
                }

                return $a_output;
        }

        function highlightText($a_text, $proglang, $autoindent)
        {

                if (!$this->hasHighlighter($proglang))
                {
                        $proglang="plain";
                }

                require_once("./Services/COPage/syntax_highlight/php/HFile/HFile_".$proglang.".php");
                $classname =  "HFile_$proglang";
                $h_instance = new $classname();
                if ($autoindent == "n") {
                        $h_instance ->notrim   = 1;
                        $h_instance ->indent   = array ("");
                        $h_instance ->unindent = array ("");
                }

                $highlighter = new Core($h_instance, new Output_css());
                $a_text = $highlighter->highlight_text(html_entity_decode($a_text));

                return $a_text;
        }

        function hasHighlighter ($hfile_ext)
        {
                return file_exists ("Services/COPage/syntax_highlight/php/HFile/HFile_".$hfile_ext.".php");
        }

}
?>