CodeBlockModification...: count file as changed when no changed elements

It means that root PSI (KtFile itself) is changed

So #KT-19726 Fixed
So #KT-20157 Fixed

idea/idea-analysis/src/org/jetbrains/kotlin/idea/project/KotlinCodeBlockModificationListener.kt

@@ -30,7 +30,6 @@ import com.intellij.pom.event.PomModelEvent
 import com.intellij.pom.event.PomModelListener
 import com.intellij.pom.tree.TreeAspect
 import com.intellij.pom.tree.events.TreeChangeEvent
-import com.intellij.psi.PsiCodeFragment
 import com.intellij.psi.PsiElement
 import com.intellij.psi.impl.PsiModificationTrackerImpl
 import com.intellij.psi.util.CachedValueProvider
@@ -84,8 +83,7 @@ class KotlinCodeBlockModificationListener(
                 val changedElements = changeSet.changedElements
                 // When a code fragment is reparsed, IntelliJ doesn't do an AST diff and considers the entire
                 // contents to be replaced, which is represented in a POM event as an empty list of changed elements
-                if (changedElements.any { getInsideCodeBlockModificationScope(it.psi) == null } ||
+                if (changedElements.any { getInsideCodeBlockModificationScope(it.psi) == null } || changedElements.isEmpty()) {
-                    (file is PsiCodeFragment && changedElements.isEmpty())) {
                     messageBusConnection.deliverImmediately()
                     if (file.isPhysical && !isReplLine(file.virtualFile)) {
                         lastAffectedModule = ModuleUtil.findModuleForPsiElement(file)

idea/testData/codeInsight/outOfBlock/WholeFileChanged.kt

@@ -0,0 +1,13 @@
+// TRUE
+// SKIP_ANALYZE_CHECK
+
+fun test() {<caret>
+
+    val someThing: Any? = null
+    val otherThing: Any? = null
+
+    if (!(someThing?.equals(otherThing) ?: otherThing == null)) {
+        // Some comment
+    }
+
+// TYPE: }

idea/tests/org/jetbrains/kotlin/idea/codeInsight/OutOfBlockModificationTestGenerated.java

@@ -269,4 +269,10 @@ public class OutOfBlockModificationTestGenerated extends AbstractOutOfBlockModif
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/codeInsight/outOfBlock/StringInSuperConstroctorCall.kt");
         doTest(fileName);
     }
+
+    @TestMetadata("WholeFileChanged.kt")
+    public void testWholeFileChanged() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/codeInsight/outOfBlock/WholeFileChanged.kt");
+        doTest(fileName);
+    }
 }