From 81f78fab01d52498b9abb0dc3d0f9bf91be86326 Mon Sep 17 00:00:00 2001
From: Alexey Andreev <konsoletyper@gmail.com>
Date: Tue, 16 May 2023 10:12:36 +0200
Subject: [PATCH] classlib: add String.strip

---
 .../java/org/teavm/classlib/java/lang/TString.java   | 12 ++++++++++++
 .../org/teavm/classlib/java/lang/StringTest.java     |  8 ++++++++
 2 files changed, 20 insertions(+)

diff --git a/classlib/src/main/java/org/teavm/classlib/java/lang/TString.java b/classlib/src/main/java/org/teavm/classlib/java/lang/TString.java
index 13dee3c2a..de4cc9d69 100644
--- a/classlib/src/main/java/org/teavm/classlib/java/lang/TString.java
+++ b/classlib/src/main/java/org/teavm/classlib/java/lang/TString.java
@@ -475,6 +475,18 @@ public class TString extends TObject implements TSerializable, TComparable<TStri
         return substring(lower, upper + 1);
     }
 
+    public TString strip() {
+        var lower = 0;
+        var upper = length() - 1;
+        while (lower <= upper && Character.isWhitespace(charAt(lower))) {
+            ++lower;
+        }
+        while (lower <= upper && Character.isWhitespace(charAt(upper))) {
+            --upper;
+        }
+        return substring(lower, upper + 1);
+    }
+
     @Override
     public String toString() {
         return (String) (Object) this;
diff --git a/tests/src/test/java/org/teavm/classlib/java/lang/StringTest.java b/tests/src/test/java/org/teavm/classlib/java/lang/StringTest.java
index 8a12ea7a2..88891a42e 100644
--- a/tests/src/test/java/org/teavm/classlib/java/lang/StringTest.java
+++ b/tests/src/test/java/org/teavm/classlib/java/lang/StringTest.java
@@ -201,6 +201,14 @@ public class StringTest {
         assertEquals("", "  ".trim());
     }
 
+    @Test
+    public void stripWorks() {
+        assertEquals("ab", "  ab   ".strip());
+        assertEquals("ab", "ab".strip());
+        assertEquals("", "  \t".strip());
+        assertEquals("ab", "\t\n \u2008ab\r\f".strip());
+    }
+
     @Test
     public void convertedToCharArray() {
         char[] array = "123".toCharArray();