From 07caf142d7dc7da5d2c09990860aca73e137b2bf Mon Sep 17 00:00:00 2001
From: thepurpleblob <thepurpleblob>
Date: Tue, 11 Sep 2007 13:55:33 +0000
Subject: [PATCH] MDL-10092: Decode HTML entities before processing.

Merged from STABLE_18
---
 filter/tex/latex.php    | 2 +-
 filter/tex/pix.php      | 3 ++-
 filter/tex/texdebug.php | 2 ++
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/filter/tex/latex.php b/filter/tex/latex.php
index d00c94b3a..b476683bd 100644
--- a/filter/tex/latex.php
+++ b/filter/tex/latex.php
@@ -1,4 +1,4 @@
-<?php
+<?php // $Id$
     // latex.php
     // render TeX stuff using latex - this will not work on all platforms
     // or configurations. Only works on Linux and Mac with appropriate 
diff --git a/filter/tex/pix.php b/filter/tex/pix.php
index 66d39c675..64bb46c2e 100644
--- a/filter/tex/pix.php
+++ b/filter/tex/pix.php
@@ -56,7 +56,8 @@
             $latex = new latex();
             $density = $CFG->filter_tex_density;
             $background = $CFG->filter_tex_latexbackground;
-            $latex_path = $latex->render( $texcache->rawtext, $md5, 12, $density, $background );
+            $texexp = html_entity_decode( $texcache->rawtext );
+            $latex_path = $latex->render( $texexp, $md5, 12, $density, $background );
             if ($latex_path) {    
                 copy( $latex_path, $pathname );
                 $latex->clean_up( $md5 );
diff --git a/filter/tex/texdebug.php b/filter/tex/texdebug.php
index e4224ecd3..3b2ad1e21 100644
--- a/filter/tex/texdebug.php
+++ b/filter/tex/texdebug.php
@@ -254,6 +254,8 @@
         $gif = "$latex->temp_dir/$md5.gif";
 
         // put the expression as a file into the temp area
+        $expression = html_entity_decode( $expression );
+        $output .= "<p>Processing TeX expression:</p><pre>$expression</pre>\n";
         $doc = $latex->construct_latex_document( $expression );
         $fh = fopen( $tex, 'w' );
         fputs( $fh, $doc );
-- 
2.11.4.GIT