Debugger: Fix breakpoints and stepping on a first line (KT-33304)

This commit fixes the 'SmartStepIntoTestGenerated#testFunWithExpressionBody' test.

idea/idea-core/src/org/jetbrains/kotlin/idea/core/util/CodeInsightUtils.java

@@ -319,9 +319,14 @@ public class CodeInsightUtils {
     public static PsiElement getTopmostElementAtOffset(@NotNull PsiElement element, int offset) {
         do {
             PsiElement parent = element.getParent();
-            if (parent == null || (parent.getTextOffset() < offset) || parent instanceof KtBlockExpression) {
+            if (parent == null
+                || (parent.getTextOffset() < offset)
+                || parent instanceof KtBlockExpression
+                || parent instanceof PsiFile
+            ) {
                 break;
             }
+
             element = parent;
         }
         while(true);

idea/jvm-debugger/jvm-debugger-core/src/org/jetbrains/kotlin/idea/debugger/breakpoints/LineBreakpointExpressionVisitor.kt

@@ -95,6 +95,14 @@ class LineBreakpointExpressionVisitor private constructor(
         return ApplicabilityResult.UNKNOWN
     }
 
+    override fun visitPackageDirective(directive: KtPackageDirective, data: Unit?): ApplicabilityResult {
+        return ApplicabilityResult.UNKNOWN
+    }
+
+    override fun visitImportDirective(importDirective: KtImportDirective, data: Unit?): ApplicabilityResult {
+        return ApplicabilityResult.UNKNOWN
+    }
+
     override fun visitProperty(property: KtProperty, data: Unit?): ApplicabilityResult {
         if (property.hasModifier(KtTokens.CONST_KEYWORD)) {
             return ApplicabilityResult.UNKNOWN

idea/jvm-debugger/jvm-debugger-core/src/org/jetbrains/kotlin/idea/debugger/breakpoints/breakpointTypeUtils.kt

@@ -23,10 +23,7 @@ import com.intellij.openapi.editor.Document
 import com.intellij.openapi.fileEditor.FileDocumentManager
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.vfs.VirtualFile
-import com.intellij.psi.PsiComment
-import com.intellij.psi.PsiElement
-import com.intellij.psi.PsiManager
-import com.intellij.psi.PsiWhiteSpace
+import com.intellij.psi.*
 import com.intellij.psi.util.PsiTreeUtil
 import com.intellij.xdebugger.XDebuggerUtil
 import com.intellij.xdebugger.XSourcePosition
@@ -114,7 +111,7 @@ fun isBreakpointApplicable(file: VirtualFile, line: Int, project: Project, check
 private fun getTopmostParentOnLineOrSelf(element: PsiElement, document: Document, line: Int): PsiElement {
     var current = element
     var parent = current.parent
-    while (parent != null) {
+    while (parent != null && parent !is PsiFile) {
         val offset = parent.textOffset
         if (offset > document.textLength) {
             val containingFile = element.containingFile

idea/jvm-debugger/jvm-debugger-test/testData/breakpointApplicability/inlineOnly.kt

@@ -1,4 +1,4 @@
-fun foo() {
+fun foo() { /// M
     require(true) { "foo" } /// *, L, λ
 
     require(true) { val a = 5 } /// *, L, λ

idea/jvm-debugger/jvm-debugger-test/testData/breakpointApplicability/locals.kt

@@ -1,4 +1,4 @@
-fun foo1() {
+fun foo1() { /// M
     // We don't support function breakpoints for local functions yet
     fun local() { /// L
         println() /// L

idea/jvm-debugger/jvm-debugger-test/testData/breakpointApplicability/properties.kt

@@ -1,4 +1,4 @@
-class Foo1 {
+class Foo1 { /// M
     val x: String /// F, L
         get() = "foo" /// M
 }