[java-typing] IDEA-333179 "}" not added automatically after typing "\{" in interpolated string

GitOrigin-RevId: 5e8c790eb6422a25705806cdcb94c252c92883b3

java/java-frontback-impl/src/com/intellij/codeInsight/editorActions/AbstractBasicJavaTypedHandler.java

@@ -125,6 +125,17 @@ public abstract class AbstractBasicJavaTypedHandler extends TypedHandlerDelegate
         return Result.CONTINUE;
       }
       Document doc = editor.getDocument();
+      if (!iterator.atEnd() &&
+          (iterator.getTokenType() == StringEscapesTokenTypes.VALID_STRING_ESCAPE_TOKEN ||
+            iterator.getTokenType() == StringEscapesTokenTypes.INVALID_CHARACTER_ESCAPE_TOKEN) &&
+          CodeInsightSettings.getInstance().AUTOINSERT_PAIR_BRACKET) { // "\{}" in strings
+        CharSequence sequence = doc.getCharsSequence();
+        if (sequence.length() > offset && sequence.charAt(offset - 1) == '\\' && sequence.charAt(offset) != '}') {
+          doc.insertString(offset, "{}");
+          editor.getCaretModel().moveToOffset(offset + 1);
+          return Result.STOP;
+        }
+      }
       PsiDocumentManager.getInstance(project).commitDocument(doc);
       final PsiElement leaf = file.findElementAt(offset);
       if (BasicJavaAstTreeUtil.getParentOfType(leaf, BASIC_ARRAY_INITIALIZER_EXPRESSION, false,

java/java-frontback-tests/testSrc/com/intellij/codeInsight/AbstractBasicJavaTypingTest.java

@@ -118,6 +118,14 @@ public abstract class AbstractBasicJavaTypingTest extends BasePlatformTestCase {
 
   public void testQuestionAfterPolyadicBoolean() { doTest('?'); }
 
+  public void testStartStringTemplate() { doTest('{'); }
+
+  public void testStartStringTemplateNoClosingQuote() { doTest('{'); }
+
+  public void testStartStringTemplateTextBlock() { doTest('{'); }
+
+  public void testStartStringTemplateAlreadyBrace() { doTest('{'); }
+
   protected void doTest(char c) {
     myFixture.configureByFile(getTestName(true) + "_before.java");
     myFixture.type(c);

java/java-tests/testData/codeInsight/typing/startStringTemplateAlreadyBrace_after.java

@@ -0,0 +1,3 @@
+class X {
+  String str = STR."hello\{<caret>}"
+}

java/java-tests/testData/codeInsight/typing/startStringTemplateAlreadyBrace_before.java

@@ -0,0 +1,3 @@
+class X {
+  String str = STR."hello\<caret>}"
+}

java/java-tests/testData/codeInsight/typing/startStringTemplateNoClosingQuote_after.java

@@ -0,0 +1,3 @@
+class X {
+  String str = STR."hello\{<caret>}
+}

java/java-tests/testData/codeInsight/typing/startStringTemplateNoClosingQuote_before.java

@@ -0,0 +1,3 @@
+class X {
+  String str = STR."hello\<caret>
+}

java/java-tests/testData/codeInsight/typing/startStringTemplateTextBlock_after.java

@@ -0,0 +1,4 @@
+class X {
+  String str = STR."""
+        hello\{<caret>}
+}

java/java-tests/testData/codeInsight/typing/startStringTemplateTextBlock_before.java

@@ -0,0 +1,4 @@
+class X {
+  String str = STR."""
+        hello\<caret>
+}

java/java-tests/testData/codeInsight/typing/startStringTemplate_after.java

@@ -0,0 +1,3 @@
+class X {
+  String str = STR."hello\{<caret>}"
+}

java/java-tests/testData/codeInsight/typing/startStringTemplate_before.java

@@ -0,0 +1,3 @@
+class X {
+  String str = STR."hello\<caret>"
+}