platform/lang-impl/src/com/intellij/refactoring/actions/PushDownAction.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package com.intellij.refactoring.actions;
  18
  19 import com.intellij.lang.Language;
  20 import com.intellij.lang.LanguageRefactoringSupport;
  21 import com.intellij.lang.refactoring.RefactoringSupportProvider;
  22 import com.intellij.openapi.actionSystem.DataContext;
  23 import com.intellij.openapi.actionSystem.LangDataKeys;
  24 import com.intellij.psi.PsiElement;
  25 import com.intellij.psi.PsiFile;
  26 import com.intellij.refactoring.RefactoringActionHandler;
  27 import com.intellij.refactoring.lang.ElementsHandler;
  28
  29
  30 public class PushDownAction extends BaseRefactoringAction {
  31
  32   public PushDownAction() {
  33     setInjectedContext(true);
  34   }
  35
  36   public boolean isAvailableInEditorOnly() {
  37     return false;
  38   }
  39
  40   public boolean isEnabledOnElements(PsiElement[] elements) {
  41     if (elements.length > 0) {
  42       final Language language = elements[0].getLanguage();
  43       final RefactoringActionHandler handler = LanguageRefactoringSupport.INSTANCE.forLanguage(language).getPushDownHandler();
  44       return handler instanceof ElementsHandler && ((ElementsHandler)handler).isEnabledOnElements(elements);
  45     }
  46     return false;
  47   }
  48
  49   public RefactoringActionHandler getHandler(DataContext dataContext) {
  50     PsiFile file = LangDataKeys.PSI_FILE.getData(dataContext);
  51     if (file == null) return null;
  52     final RefactoringSupportProvider supportProvider = LanguageRefactoringSupport.INSTANCE.forLanguage(file.getViewProvider().getBaseLanguage());
  53     return supportProvider != null ? supportProvider.getPushDownHandler() : null;
  54   }
  55
  56   protected boolean isAvailableForLanguage(final Language language) {
  57     return LanguageRefactoringSupport.INSTANCE.forLanguage(language).getPushDownHandler() != null;
  58   }
  59 }