From: Ben Soares <b.soares@dundee.ac.uk>
Date: Tue, 31 Oct 2023 09:28:36 +0000 (+0000)
Subject: JAL-4059 Converting Pattern/Matcher methods that are possibly incompatible with JS... 
X-Git-Url: http://source.jalview.org/gitweb/?a=commitdiff_plain;h=3b65a96203737c2ace58b1205e0056508e9dbff3;p=jalview.git

JAL-4059 Converting Pattern/Matcher methods that are possibly incompatible with JS regex equivalents
---

diff --git a/src/jalview/util/StringUtils.java b/src/jalview/util/StringUtils.java
index 89bc36d..9212c8e 100644
--- a/src/jalview/util/StringUtils.java
+++ b/src/jalview/util/StringUtils.java
@@ -25,7 +25,6 @@ import java.net.URLEncoder;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
-import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 public class StringUtils
@@ -178,6 +177,8 @@ public class StringUtils
       cp = pos + seplen;
       wasescaped = escape == -1;
       // last separator may be in an unmatched quote
+      // private static final Pattern DELIMITERS_PATTERN =
+      // Pattern.compile(".*='[^']*(?!')");
       wasquoted = DELIMITERS_PATTERN.matcher(lstitem).matches();
     }
     if (cp < input.length())
@@ -597,14 +598,20 @@ public class StringUtils
 
   public static int indexOfFirstWhitespace(String text)
   {
-    int index = -1;
-    Pattern pat = Pattern.compile("\\s");
-    Matcher m = pat.matcher(text);
-    if (m.find())
+    // Rewritten to not use regex for Jalviewjs. Probably more efficient this
+    // way anyway.
+    if (text == null)
+    {
+      return -1;
+    }
+    for (int i = 0; i < text.length(); i++)
     {
-      index = m.start();
+      if (Character.isWhitespace(text.charAt(i)))
+      {
+        return i;
+      }
     }
-    return index;
+    return -1;
   }
 
   /*