| /* |
| * Copyright 2000-2011 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.refactoring.actions; |
| |
| import com.intellij.lang.Language; |
| import com.intellij.lang.LanguageRefactoringSupport; |
| import com.intellij.lang.refactoring.RefactoringSupportProvider; |
| import com.intellij.openapi.actionSystem.CommonDataKeys; |
| import com.intellij.openapi.actionSystem.DataContext; |
| import com.intellij.openapi.actionSystem.LangDataKeys; |
| import com.intellij.openapi.actionSystem.PlatformDataKeys; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.extensions.ExtensionPointListener; |
| import com.intellij.openapi.extensions.PluginDescriptor; |
| import com.intellij.openapi.util.Condition; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.refactoring.RefactoringActionHandler; |
| import com.intellij.refactoring.lang.ElementsHandler; |
| import com.intellij.util.containers.ContainerUtil; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.List; |
| |
| /** |
| * @author yole |
| */ |
| public abstract class BasePlatformRefactoringAction extends BaseRefactoringAction { |
| private Boolean myHidden = null; |
| private final Condition<RefactoringSupportProvider> myCondition = new Condition<RefactoringSupportProvider>() { |
| @Override |
| public boolean value(RefactoringSupportProvider provider) { |
| return getRefactoringHandler(provider) != null; |
| } |
| }; |
| |
| public BasePlatformRefactoringAction() { |
| LanguageRefactoringSupport.INSTANCE.addListener(new ExtensionPointListener<RefactoringSupportProvider>() { |
| @Override |
| public void extensionAdded(@NotNull RefactoringSupportProvider extension, @Nullable PluginDescriptor pluginDescriptor) { |
| myHidden = null; |
| } |
| |
| @Override |
| public void extensionRemoved(@NotNull RefactoringSupportProvider extension, @Nullable PluginDescriptor pluginDescriptor) { |
| myHidden = null; |
| } |
| }); |
| } |
| |
| @Override |
| protected final RefactoringActionHandler getHandler(@NotNull DataContext dataContext) { |
| PsiElement element = null; |
| Editor editor = CommonDataKeys.EDITOR.getData(dataContext); |
| PsiFile file = CommonDataKeys.PSI_FILE.getData(dataContext); |
| if (editor != null && file != null) { |
| element = getElementAtCaret(editor, file); |
| if (element != null) { |
| RefactoringActionHandler handler = getHandler(element.getLanguage(), element); |
| if (handler != null) { |
| return handler; |
| } |
| } |
| } |
| |
| PsiElement referenced = CommonDataKeys.PSI_ELEMENT.getData(dataContext); |
| if (referenced != null) { |
| RefactoringActionHandler handler = getHandler(referenced.getLanguage(), referenced); |
| if (handler != null) { |
| return handler; |
| } |
| } |
| |
| PsiElement[] psiElements = LangDataKeys.PSI_ELEMENT_ARRAY.getData(dataContext); |
| if (psiElements != null && psiElements.length > 1) { |
| RefactoringActionHandler handler = getHandler(psiElements[0].getLanguage(), psiElements[0]); |
| if (handler != null && isEnabledOnElements(psiElements)) { |
| return handler; |
| } |
| } |
| |
| if (element == null) { |
| element = referenced; |
| } |
| |
| final Language[] languages = LangDataKeys.CONTEXT_LANGUAGES.getData(dataContext); |
| if (languages != null) { |
| for (Language language : languages) { |
| RefactoringActionHandler handler = getHandler(language, element); |
| if (handler != null) { |
| return handler; |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| @Nullable |
| protected RefactoringActionHandler getHandler(@NotNull Language language, PsiElement element) { |
| List<RefactoringSupportProvider> providers = LanguageRefactoringSupport.INSTANCE.allForLanguage(language); |
| if (providers.isEmpty()) return null; |
| if (element == null && !providers.isEmpty()) return getRefactoringHandler(providers.get(0)); |
| if (element != null) { |
| for (RefactoringSupportProvider provider : providers) { |
| if (provider.isAvailable(element)) { |
| return getRefactoringHandler(provider); |
| } |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| protected boolean isAvailableOnElementInEditorAndFile(@NotNull PsiElement element, @NotNull Editor editor, @NotNull PsiFile file, @NotNull DataContext context) { |
| return getHandler(context) != null; |
| } |
| |
| @Override |
| protected boolean isAvailableForLanguage(final Language language) { |
| List<RefactoringSupportProvider> providers = LanguageRefactoringSupport.INSTANCE.allForLanguage(language); |
| return ContainerUtil.find(providers, myCondition) != null; |
| } |
| |
| @Override |
| protected boolean isEnabledOnElements(@NotNull PsiElement[] elements) { |
| if (elements.length > 0) { |
| Language language = elements[0].getLanguage(); |
| RefactoringActionHandler handler = getHandler(language, elements[0]); |
| return handler instanceof ElementsHandler && ((ElementsHandler)handler).isEnabledOnElements(elements); |
| } |
| return false; |
| } |
| |
| @Nullable |
| protected abstract RefactoringActionHandler getRefactoringHandler(@NotNull RefactoringSupportProvider provider); |
| |
| @Override |
| protected boolean isHidden() { |
| if (myHidden == null) { |
| myHidden = calcHidden(); |
| } |
| return myHidden.booleanValue(); |
| } |
| |
| private boolean calcHidden() { |
| for(Language l: Language.getRegisteredLanguages()) { |
| if (isAvailableForLanguage(l)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |