fix math expression problems

bibtexbrowser.php

@@ -997,6 +997,21 @@ function latex2html($line, $do_clean_extra_bracket=true) {
   // added && strpos($line,'{')===false
   if (strpos($line,'\\')===false && strpos($line,'{')===false) return $line;
 
+  // handling uppercase
+  //  echo preg_replace_callback('!\b[a-z]!', 'upper', strtolower($str));
+  if (!function_exists("strtolowercallback")) {
+    function strtolowercallback($array) {
+      return strtolower($array[1]);
+    }
+  }
+  if (!function_exists("strtouppercallback")) {
+    function strtouppercallback($array) {
+      return strtoupper($array[1]);
+    }
+  }
+  $line = preg_replace_callback('/\\\\uppercase\{(.*)\}/U',"strtouppercallback", $line);
+  $line = preg_replace_callback('/\\\\lowercase\{(.*)\}/U',"strtolowercallback", $line);
+
   $maths = array();
   $index = 0;
   // first we escape the math env
@@ -1087,6 +1102,8 @@ function latex2html($line, $do_clean_extra_bracket=true) {
   // handling \textsubscript{....} FAILS if there still are nested {}
   $line = preg_replace('/\\\\textsubscript\{(.*)\}/U','<sub>\\1</sub>', $line);
 
+
+
   if ($do_clean_extra_bracket) {
     // clean extra tex curly brackets, usually used for preserving capitals
     // must come before the final math replacement
@@ -2452,7 +2469,7 @@ function JanosBibliographyStyle($bibentry) {
   }
 
   if ($type=="article" && $bibentry->hasField("journal")) {
-      $booktitle = '<span class="bibbooktitle">'.'In '.$bibentry->getField("journal").'</span>';
+      $booktitle = '<span class="bibbooktitle">'.''.$bibentry->getField("journal").'</span>';
   }
 
 
@@ -2774,12 +2791,16 @@ $('a.biburl').each(function() { // for each url "[bibtex]"
 if (!function_exists('javascript_math')) {
   function javascript_math() {
     ?>
-    <script type="text/x-mathjax-config">
-      MathJax.Hub.Config({
-        tex2jax: {inlineMath: [["$","$"]]}
-      });
-    </script>
-    <script src="<?php echo MATHJAX_URI ?>"></script>
+<script>
+MathJax = {
+  tex: {
+    inlineMath: [['$', '$'], ['\\(', '\\)']]
+  }
+};
+</script>
+<script type="text/javascript" id="MathJax-script" async
+  src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js">
+</script>
     <?php
   }
 }