Move ScratchService to API and enable intentions actions in scratches

platform/lang-api/src/com/intellij/codeInsight/intention/BaseElementAtCaretIntentionAction.java

@@ -17,6 +17,7 @@
 package com.intellij.codeInsight.intention;
 
 import com.intellij.codeInsight.intention.impl.BaseIntentionAction;
+import com.intellij.ide.scratch.ScratchFileService;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.project.Project;
 import com.intellij.psi.PsiElement;
@@ -51,7 +52,7 @@ public abstract class BaseElementAtCaretIntentionAction extends BaseIntentionAct
   }
 
   protected boolean checkFile(@NotNull PsiFile file) {
-    return file.getManager().isInProject(file);
+    return file.getManager().isInProject(file) || ScratchFileService.isInScratchRoot(file.getVirtualFile());
   }
 
   /**
@@ -81,8 +82,7 @@ public abstract class BaseElementAtCaretIntentionAction extends BaseIntentionAct
    * @param project the project in which the file is opened.
    * @param editor  the editor for the file.
    * @param element the element under cursor.
-   * @throws com.intellij.util.IncorrectOperationException
-   *
+   * @throws IncorrectOperationException
    */
   public abstract void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element) throws IncorrectOperationException;
 

platform/lang-api/src/com/intellij/codeInsight/intention/PsiElementBaseIntentionAction.java

@@ -17,6 +17,7 @@
 package com.intellij.codeInsight.intention;
 
 import com.intellij.codeInsight.intention.impl.BaseIntentionAction;
+import com.intellij.ide.scratch.ScratchFileService;
 import com.intellij.openapi.editor.CaretModel;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.project.Project;
@@ -36,29 +37,31 @@ import org.jetbrains.annotations.Nullable;
 public abstract class PsiElementBaseIntentionAction extends BaseIntentionAction {
   @Override
   public final void invoke(@NotNull Project project, Editor editor, PsiFile file) throws IncorrectOperationException {
-    if (!file.getManager().isInProject(file)) return;
+    if (!checkFile(file)) return;
     final PsiElement element = getElement(editor, file);
     if (element != null) {
       invoke(project, editor, element);
     }
   }
 
+  protected boolean checkFile(@Nullable PsiFile file) {
+    if (file == null) return false;
+    PsiManager manager = file.getManager();
+    return manager != null && manager.isInProject(file) || ScratchFileService.isInScratchRoot(file.getVirtualFile());
+  }
+
   /**
    * Invokes intention action for the element under caret.
    *
    * @param project the project in which the file is opened.
    * @param editor  the editor for the file.
    * @param element the element under cursor.
-   *
    */
   public abstract void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element) throws IncorrectOperationException;
 
   @Override
   public final boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) {
-    if (file == null) return false;
-    final PsiManager manager = file.getManager();
-    if (manager == null) return false;
-    if (!manager.isInProject(file)) return false;
+    if (!checkFile(file)) return false;
     final PsiElement element = editor == null ? null : getElement(editor, file);
     return element != null && isAvailable(project, editor, element);
   }

platform/lang-api/src/com/intellij/ide/scratch/RootType.java

@@ -22,6 +22,7 @@ import com.intellij.openapi.extensions.ExtensionPointName;
 import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.fileEditor.FileEditorManager;
 import com.intellij.openapi.fileTypes.FileType;
+import com.intellij.openapi.fileTypes.FileTypeManager;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.vfs.VirtualFile;
@@ -95,7 +96,10 @@ public abstract class RootType {
   public Icon substituteIcon(@NotNull Project project, @NotNull VirtualFile file) {
     Language language = substituteLanguage(project, file);
     FileType fileType = LanguageUtil.getLanguageFileType(language);
-    if (fileType == null) fileType = ScratchUtil.getFileTypeFromName(file);
+    if (fileType == null) {
+      String extension = file.getExtension();
+      fileType = extension == null ? null : FileTypeManager.getInstance().getFileTypeByFileName(file.getNameSequence());
+    }
     return fileType != null ? fileType.getIcon() : null;
   }
 

platform/lang-impl/src/com/intellij/ide/scratch/ScratchFileType.java

@@ -15,7 +15,6 @@
  */
 package com.intellij.ide.scratch;
 
-import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.fileTypes.LanguageFileType;
 import com.intellij.openapi.fileTypes.PlainTextFileType;
 import com.intellij.openapi.fileTypes.PlainTextLanguage;
@@ -39,7 +38,7 @@ public class ScratchFileType extends LanguageFileType implements FileTypeIdentif
 
   @Override
   public boolean isMyFileType(@NotNull VirtualFile file) {
-    return ScratchFileService.getInstance().getRootType(file) != null;
+    return ScratchFileService.isInScratchRoot(file);
   }
 
   @NotNull

platform/lang-impl/src/com/intellij/ide/scratch/ScratchUtil.java

@@ -74,7 +74,7 @@ public class ScratchUtil {
   }
 
   @Nullable
-  public static FileType getFileTypeFromName(@NotNull VirtualFile file) {
+  private static FileType getFileTypeFromName(@NotNull VirtualFile file) {
     String extension = file.getExtension();
     return extension == null ? null : FileTypeManager.getInstance().getFileTypeByExtension(extension);
   }