EDU-121 Forbid renaming

python/educational/interactive-learning/resources/META-INF/plugin.xml

@@ -61,6 +61,9 @@
             description="Show hint for answer placeholder"/>
     <action id="StudyRunAction" class="com.jetbrains.edu.learning.actions.StudyRunAction" text="Run File With Tests"
             description="Run your code with tests"/>
+    <action overrides="true"  id="RenameElement" class="com.jetbrains.edu.learning.actions.StudyRenameTaskFileAction"
+      text="Rename..."
+    />
 
   </actions>
 

python/educational/interactive-learning/src/com/jetbrains/edu/learning/actions/StudyRenameTaskFileAction.java

@@ -0,0 +1,26 @@
+package com.jetbrains.edu.learning.actions;
+
+import com.intellij.openapi.actionSystem.CommonDataKeys;
+import com.intellij.openapi.actionSystem.DataContext;
+import com.intellij.psi.PsiElement;
+import com.intellij.refactoring.actions.RenameElementAction;
+import com.jetbrains.edu.learning.StudyUtils;
+import org.jetbrains.annotations.NotNull;
+
+public class StudyRenameTaskFileAction extends RenameElementAction {
+  @Override
+  protected boolean isEnabledOnDataContext(DataContext dataContext) {
+    PsiElement element = CommonDataKeys.PSI_ELEMENT.getData(dataContext);
+    return super.isEnabledOnDataContext(dataContext) && !isTaskFile(element);
+  }
+
+  private static boolean isTaskFile(PsiElement element) {
+    return element != null && StudyUtils.getTaskFile(element.getProject(),
+                                  element.getContainingFile().getVirtualFile()) != null;
+  }
+
+  @Override
+  public boolean isEnabledOnElements(@NotNull PsiElement[] elements){
+    return !super.isEnabledOnElements(elements) && !isTaskFile(elements[0]);
+  }
+}