Refactoring: introduce isKotlinScratch function

idea/idea-jvm/src/org/jetbrains/kotlin/idea/scratch/actions/ScratchRunLineMarkerContributor.kt

@@ -6,8 +6,6 @@
 package org.jetbrains.kotlin.idea.scratch.actions
 
 import com.intellij.execution.lineMarker.RunLineMarkerContributor
-import com.intellij.ide.scratch.ScratchFileService
-import com.intellij.ide.scratch.ScratchRootType
 import com.intellij.openapi.editor.EditorFactory
 import com.intellij.openapi.fileEditor.TextEditor
 import com.intellij.openapi.fileEditor.impl.text.TextEditorProvider
@@ -21,6 +19,7 @@ import org.jetbrains.kotlin.idea.core.util.getLineCount
 import org.jetbrains.kotlin.idea.refactoring.getLineNumber
 import org.jetbrains.kotlin.idea.scratch.ScratchExpression
 import org.jetbrains.kotlin.idea.scratch.getScratchPanel
+import org.jetbrains.kotlin.idea.scratch.isKotlinScratch
 import org.jetbrains.kotlin.idea.scratch.isKotlinWorksheet
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.findDescendantOfType
@@ -32,7 +31,7 @@ class ScratchRunLineMarkerContributor : RunLineMarkerContributor() {
         val ktFile = element.containingFile as? KtFile
         if (ktFile?.isScript() != true) return null
         val file = ktFile.virtualFile
-        if (!(ScratchFileService.getInstance().getRootType(file) is ScratchRootType || file.isKotlinWorksheet)) return null
+        if (!(file.isKotlinScratch || file.isKotlinWorksheet)) return null
 
         val declaration = element.getStrictParentOfType<KtNamedDeclaration>()
         if (declaration != null && declaration !is KtParameter && declaration.nameIdentifier == element) {

idea/idea-jvm/src/org/jetbrains/kotlin/idea/scratch/scratchUtils.kt

@@ -5,6 +5,8 @@
 
 package org.jetbrains.kotlin.idea.scratch
 
+import com.intellij.ide.scratch.ScratchFileService
+import com.intellij.ide.scratch.ScratchRootType
 import com.intellij.openapi.diagnostic.Logger
 import com.intellij.openapi.fileEditor.FileEditorManager
 import com.intellij.openapi.fileEditor.TextEditor
@@ -24,7 +26,11 @@ internal fun Logger.printDebugMessage(str: String) {
     if (isDebugEnabled) debug("SCRATCH: $str")
 }
 
-val VirtualFile.isKotlinWorksheet: Boolean get() = name.endsWith(".$KOTLIN_WORKSHEET_EXTENSION")
+val VirtualFile.isKotlinWorksheet: Boolean
+    get() = name.endsWith(".$KOTLIN_WORKSHEET_EXTENSION")
+
+val VirtualFile.isKotlinScratch: Boolean
+    get() = ScratchFileService.getInstance().getRootType(this) is ScratchRootType
 
 fun getEditorWithoutScratchPanel(fileManager: FileEditorManager, virtualFile: VirtualFile): TextEditor? {
     val editor = fileManager.getSelectedEditor(virtualFile) as? TextEditor

idea/idea-jvm/src/org/jetbrains/kotlin/idea/scratch/ui/ScratchFileHook.kt

@@ -16,8 +16,6 @@
 
 package org.jetbrains.kotlin.idea.scratch.ui
 
-import com.intellij.ide.scratch.ScratchFileService
-import com.intellij.ide.scratch.ScratchRootType
 import com.intellij.openapi.components.ProjectComponent
 import com.intellij.openapi.fileEditor.FileEditorManager
 import com.intellij.openapi.fileEditor.FileEditorManagerListener
@@ -52,7 +50,7 @@ class ScratchFileHook(val project: Project) : ProjectComponent {
 
     private fun isPluggable(file: VirtualFile): Boolean {
         if (!file.isValid) return false
-        if (!(ScratchFileService.getInstance().getRootType(file) is ScratchRootType || file.isKotlinWorksheet)) return false
+        if (!(file.isKotlinScratch || file.isKotlinWorksheet)) return false
         val psiFile = PsiManager.getInstance(project).findFile(file) ?: return false
         return ScratchFileLanguageProvider.get(psiFile.fileType) != null
     }