Introduce Variable: Skip leading/trailing comments inside selection

#KT-13054 Fixed

idea/src/org/jetbrains/kotlin/idea/refactoring/KotlinRefactoringUtil.java

@@ -53,6 +53,7 @@ import org.jetbrains.kotlin.idea.refactoring.introduce.IntroduceUtilKt;
 import org.jetbrains.kotlin.idea.util.IdeDescriptorRenderers;
 import org.jetbrains.kotlin.psi.*;
 import org.jetbrains.kotlin.psi.psiUtil.KtPsiUtilKt;
+import org.jetbrains.kotlin.psi.psiUtil.PsiUtilsKt;
 import org.jetbrains.kotlin.renderer.DescriptorRenderer;
 import org.jetbrains.kotlin.resolve.BindingContext;
 import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils;
@@ -350,9 +351,17 @@ public class KotlinRefactoringUtil {
         if (editor.getSelectionModel().hasSelection()) {
             int selectionStart = editor.getSelectionModel().getSelectionStart();
             int selectionEnd = editor.getSelectionModel().getSelectionEnd();
-            String text = file.getText();
-            while (selectionStart < selectionEnd && Character.isSpaceChar(text.charAt(selectionStart))) ++selectionStart;
-            while (selectionStart < selectionEnd && Character.isSpaceChar(text.charAt(selectionEnd - 1))) --selectionEnd;
+
+            PsiElement firstElement = file.findElementAt(selectionStart);
+            PsiElement lastElement = file.findElementAt(selectionEnd - 1);
+
+            if (PsiTreeUtil.getParentOfType(firstElement, KtLiteralStringTemplateEntry.class, KtEscapeStringTemplateEntry.class) == null
+                    && PsiTreeUtil.getParentOfType(lastElement, KtLiteralStringTemplateEntry.class, KtEscapeStringTemplateEntry.class) == null) {
+                firstElement = PsiUtilsKt.getNextSiblingIgnoringWhitespaceAndComments(firstElement, true);
+                lastElement = PsiUtilsKt.getPrevSiblingIgnoringWhitespaceAndComments(lastElement, true);
+                selectionStart = firstElement.getTextRange().getStartOffset();
+                selectionEnd = lastElement.getTextRange().getEndOffset();
+            }
 
             for (CodeInsightUtils.ElementKind elementKind : elementKinds) {
                 PsiElement element = findElement(file, selectionStart, selectionEnd, failOnEmptySuggestion, elementKind);

idea/testData/refactoring/introduceVariable/commentSkipping.kt

@@ -0,0 +1,7 @@
+fun foo(x: Boolean) {
+
+}
+
+fun bar() {
+    foo(<selection>/* 1 */true/* 2 */</selection>)
+}

idea/testData/refactoring/introduceVariable/commentSkipping.kt.after

@@ -0,0 +1,8 @@
+fun foo(x: Boolean) {
+
+}
+
+fun bar() {
+    val x = true
+    foo(/* 1 */x/* 2 */)
+}

idea/testData/refactoring/introduceVariable/stringTemplates/extractTrueWithSpaces.kt

@@ -0,0 +1,7 @@
+fun foo(param: Int): String {
+    val x = "atrue123"
+    val y = "aTRUE123"
+    val z = true
+    val u = "123 true 456"
+    return "ab<selection> true </selection>def"
+}

idea/testData/refactoring/introduceVariable/stringTemplates/extractTrueWithSpaces.kt.after

@@ -0,0 +1,8 @@
+fun foo(param: Int): String {
+    val x = "atrue123"
+    val y = "aTRUE123"
+    val z = true
+    val s = " true "
+    val u = "123${s}456"
+    return "ab${s}def"
+}

idea/tests/org/jetbrains/kotlin/idea/refactoring/introduce/ExtractionTestGenerated.java

@@ -61,6 +61,12 @@ public class ExtractionTestGenerated extends AbstractExtractionTest {
             doIntroduceVariableTest(fileName);
         }
 
+        @TestMetadata("commentSkipping.kt")
+        public void testCommentSkipping() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceVariable/commentSkipping.kt");
+            doIntroduceVariableTest(fileName);
+        }
+
         @TestMetadata("ComplexCallee.kt")
         public void testComplexCallee() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceVariable/ComplexCallee.kt");
@@ -735,6 +741,12 @@ public class ExtractionTestGenerated extends AbstractExtractionTest {
                 doIntroduceVariableTest(fileName);
             }
 
+            @TestMetadata("extractTrueWithSpaces.kt")
+            public void testExtractTrueWithSpaces() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceVariable/stringTemplates/extractTrueWithSpaces.kt");
+                doIntroduceVariableTest(fileName);
+            }
+
             @TestMetadata("fullContent.kt")
             public void testFullContent() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceVariable/stringTemplates/fullContent.kt");