fix math expression problems

BibtexbrowserTest.php

@@ -141,7 +141,7 @@ class BibtexbrowserTest extends PHPUnit_Framework_TestCase {
     
     // IEEE style
     bibtexbrowser_configure('BIBLIOGRAPHYSTYLE','JanosBibliographyStyle');
-    $this->assertEquals("Foo Bar and Jane Doe, \"An Article\", In New Results, vol. 5, pp. 1-2, 2009.\n ",strip_tags($first_entry->toHTML()));
+    $this->assertEquals("Foo Bar and Jane Doe, \"An Article\", New Results, vol. 5, pp. 1-2, 2009.\n ",strip_tags($first_entry->toHTML()));
     $css_classes_after = $this->extract_css_classes($first_entry->toHTML());
     // contract: make sure the Janos style and default style use the same CSS classes
     $this->assertEquals($css_classes_before, $css_classes_after);
@@ -847,6 +847,20 @@ class BibtexbrowserTest extends PHPUnit_Framework_TestCase {
         
     }
 
+    function test_uppercase() {
+  print(preg_replace_callback('/\\\\uppercase\{(.*)\}/',"strtolowercallback", "$\uppercase{B}"));
+
+        $bibtex = "@article{doe2000,title={Preferential polarization and its reversal in polycrystalline $\uppercase{B}i\uppercase{F}e\uppercase{O}_{3}$/$\uppercase{L}a_{0. 5}\uppercase{S}r_{0.5} \uppercase{C}o\uppercase{O}_{3}$ heterostructures},author={Jane Doe},journal={The Wordpress Journal},year=2000}";
+        $test_data = fopen('php://memory','x+');
+        fwrite($test_data, $bibtex);
+        fseek($test_data,0);
+        $db = new BibDataBase();
+        $_GET[Q_FILE] = 'sample.bib';
+        $db->update_internal("inline", $test_data);
+        $this->assertEquals('Preferential polarization and its reversal in polycrystalline $BiFeO_{3}$/$La_{0. 5}Sr_{0.5} CoO_{3}$ heterostructures', $db->bibdb['doe2000']->getTitle());
+    }
+
+    
     
 } // end class
 

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 @@ $('a.biburl').each(function() { // for each url "[bibtex]"
 if (!function_exists('javascript_math')) {
   function javascript_math() {
     ?>
-    <script type="text/x-mathjax-config">
+<script>
-      MathJax.Hub.Config({
+MathJax = {
-        tex2jax: {inlineMath: [["$","$"]]}
+  tex: {
-      });
+    inlineMath: [['$', '$'], ['\\(', '\\)']]
-    </script>
+  }
-    <script src="<?php echo MATHJAX_URI ?>"></script>
+};
+</script>
+<script type="text/javascript" id="MathJax-script" async
+  src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js">
+</script>
     <?php
   }
 }