LineIndentProvider: support empty brackets

Part of #KT-22211
Part of #KT-39353

idea/line-indent-provider/src/org/jetbrains/kotlin/idea/formatter/lineIndent/KotlinLikeLangLineIndentProvider.kt

@@ -47,6 +47,9 @@ abstract class KotlinLikeLangLineIndentProvider : JavaLikeLangLineIndentProvider
             before.isAt(BlockOpeningBrace) && after.isAt(BlockClosingBrace) && !currentPosition.hasLineBreaksAfter(offset) ->
                 return factory.createIndentCalculator(Indent.getNoneIndent(), before.startOffset)
 
+            before.isAt(ArrayOpeningBracket) && after.isAt(ArrayClosingBracket) && !currentPosition.hasLineBreaksAfter(offset) ->
+                return factory.createIndentCalculator(Indent.getNoneIndent(), before.startOffset)
+
             before.isAt(BlockOpeningBrace) && before.beforeIgnoringWhiteSpaceOrComment().isFunctionDeclaration() ->
                 return factory.createIndentCalculator(Indent.getNormalIndent(), before.startOffset)
 

idea/performanceTests/test/org/jetbrains/kotlin/idea/perf/PerformanceTypingIndentationTestGenerated.java

@@ -203,6 +203,24 @@ public class PerformanceTypingIndentationTestGenerated extends AbstractPerforman
         runTest("idea/testData/indentationOnNewline/SettingAlignMultilineParametersInCalls.kt");
     }
 
+    @TestMetadata("idea/testData/indentationOnNewline/arrayAccess")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class ArrayAccess extends AbstractPerformanceTypingIndentationTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest(this::doPerfTest, this, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInArrayAccess() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("idea/testData/indentationOnNewline/arrayAccess"), Pattern.compile("^([^.]+)\\.(kt|kts)$"), null, true);
+        }
+
+        @TestMetadata("listAccess.kt")
+        public void testListAccess() throws Exception {
+            runTest("idea/testData/indentationOnNewline/arrayAccess/listAccess.kt");
+        }
+    }
+
     @TestMetadata("idea/testData/indentationOnNewline/controlFlowConstructions")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)

idea/testData/indentationOnNewline/arrayAccess/listAccess.after.kt

@@ -0,0 +1,8 @@
+fun a() {
+    val a = listOf(1, 2)
+    println(
+        a[
+        <caret>
+        ]
+    )
+}

idea/testData/indentationOnNewline/arrayAccess/listAccess.kt

@@ -0,0 +1,6 @@
+fun a() {
+    val a = listOf(1, 2)
+    println(
+        a[<caret>]
+    )
+}

idea/tests/org/jetbrains/kotlin/formatter/TypingIndentationTestBaseGenerated.java

@@ -205,6 +205,24 @@ public class TypingIndentationTestBaseGenerated extends AbstractTypingIndentatio
             runTest("idea/testData/indentationOnNewline/SettingAlignMultilineParametersInCalls.after.kt");
         }
 
+        @TestMetadata("idea/testData/indentationOnNewline/arrayAccess")
+        @TestDataPath("$PROJECT_ROOT")
+        @RunWith(JUnit3RunnerWithInners.class)
+        public static class ArrayAccess extends AbstractTypingIndentationTestBase {
+            private void runTest(String testDataFilePath) throws Exception {
+                KotlinTestUtils.runTest(this::doNewlineTest, this, testDataFilePath);
+            }
+
+            public void testAllFilesPresentInArrayAccess() throws Exception {
+                KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("idea/testData/indentationOnNewline/arrayAccess"), Pattern.compile("^([^\\.]+)\\.after\\.kt.*$"), null, true);
+            }
+
+            @TestMetadata("listAccess.after.kt")
+            public void testListAccess() throws Exception {
+                runTest("idea/testData/indentationOnNewline/arrayAccess/listAccess.after.kt");
+            }
+        }
+
         @TestMetadata("idea/testData/indentationOnNewline/controlFlowConstructions")
         @TestDataPath("$PROJECT_ROOT")
         @RunWith(JUnit3RunnerWithInners.class)
@@ -1174,6 +1192,19 @@ public class TypingIndentationTestBaseGenerated extends AbstractTypingIndentatio
             runTest("idea/testData/indentationOnNewline/SettingAlignMultilineParametersInCalls.after.inv.kt");
         }
 
+        @TestMetadata("idea/testData/indentationOnNewline/arrayAccess")
+        @TestDataPath("$PROJECT_ROOT")
+        @RunWith(JUnit3RunnerWithInners.class)
+        public static class ArrayAccess extends AbstractTypingIndentationTestBase {
+            private void runTest(String testDataFilePath) throws Exception {
+                KotlinTestUtils.runTest(this::doNewlineTestWithInvert, this, testDataFilePath);
+            }
+
+            public void testAllFilesPresentInArrayAccess() throws Exception {
+                KotlinTestUtils.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("idea/testData/indentationOnNewline/arrayAccess"), Pattern.compile("^([^\\.]+)\\.after\\.inv\\.kt.*$"), null, true);
+            }
+        }
+
         @TestMetadata("idea/testData/indentationOnNewline/controlFlowConstructions")
         @TestDataPath("$PROJECT_ROOT")
         @RunWith(JUnit3RunnerWithInners.class)