| /* |
| * Copyright 2000-2013 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.DataContext; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.editor.ScrollType; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.PsiNameIdentifierOwner; |
| import com.intellij.psi.PsiReference; |
| import com.intellij.refactoring.RefactoringActionHandler; |
| import com.intellij.refactoring.changeSignature.ChangeSignatureHandler; |
| import com.intellij.refactoring.util.CommonRefactoringUtil; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| public class ChangeSignatureAction extends BasePlatformRefactoringAction { |
| |
| public ChangeSignatureAction() { |
| setInjectedContext(true); |
| } |
| |
| @Override |
| public boolean isAvailableInEditorOnly() { |
| return false; |
| } |
| |
| @Override |
| public boolean isEnabledOnElements(@NotNull PsiElement[] elements) { |
| return elements.length == 1 && findTargetMember(elements[0]) != null; |
| } |
| |
| @Override |
| protected boolean isAvailableOnElementInEditorAndFile(@NotNull final PsiElement element, @NotNull final Editor editor, @NotNull PsiFile file, @NotNull DataContext context) { |
| PsiElement targetMember = findTargetMember(element); |
| if (targetMember == null) { |
| final ChangeSignatureHandler targetHandler = getChangeSignatureHandler(file.getLanguage()); |
| if (targetHandler != null) { |
| return true; |
| } |
| return false; |
| } |
| final ChangeSignatureHandler targetHandler = getChangeSignatureHandler(targetMember.getLanguage()); |
| if (targetHandler == null) return false; |
| return true; |
| } |
| |
| @Nullable |
| private static PsiElement findTargetMember(@Nullable PsiElement element) { |
| if (element == null) return null; |
| final ChangeSignatureHandler fileHandler = getChangeSignatureHandler(element.getLanguage()); |
| if (fileHandler != null) { |
| final PsiElement targetMember = fileHandler.findTargetMember(element); |
| if (targetMember != null) return targetMember; |
| } |
| PsiReference reference = element.getReference(); |
| if (reference == null && element instanceof PsiNameIdentifierOwner) { |
| return element; |
| } |
| if (reference != null) { |
| return reference.resolve(); |
| } |
| return null; |
| } |
| |
| @Nullable |
| @Override |
| protected RefactoringActionHandler getRefactoringHandler(@NotNull RefactoringSupportProvider provider) { |
| return provider.getChangeSignatureHandler(); |
| } |
| |
| @Nullable |
| @Override |
| protected RefactoringActionHandler getRefactoringHandler(@NotNull RefactoringSupportProvider provider, final PsiElement element) { |
| return new RefactoringActionHandler() { |
| @Override |
| public void invoke(@NotNull Project project, Editor editor, PsiFile file, DataContext dataContext) { |
| editor.getScrollingModel().scrollToCaret(ScrollType.MAKE_VISIBLE); |
| final PsiElement targetMember = findTargetMember(element); |
| if (targetMember == null) { |
| final ChangeSignatureHandler handler = getChangeSignatureHandler(file.getLanguage()); |
| if (handler != null) { |
| final String notFoundMessage = handler.getTargetNotFoundMessage(); |
| if (notFoundMessage != null) { |
| CommonRefactoringUtil.showErrorHint(project, editor, notFoundMessage, ChangeSignatureHandler.REFACTORING_NAME, null); |
| } |
| } |
| return; |
| } |
| final ChangeSignatureHandler handler = getChangeSignatureHandler(targetMember.getLanguage()); |
| if (handler == null) return; |
| handler.invoke(project, new PsiElement[]{targetMember}, dataContext); |
| } |
| |
| @Override |
| public void invoke(@NotNull Project project, @NotNull PsiElement[] elements, DataContext dataContext) { |
| if (elements.length != 1) return; |
| final PsiElement targetMember = findTargetMember(elements[0]); |
| if (targetMember == null) return; |
| final ChangeSignatureHandler handler = getChangeSignatureHandler(targetMember.getLanguage()); |
| if (handler == null) return; |
| handler.invoke(project, new PsiElement[]{targetMember}, dataContext); |
| } |
| }; |
| } |
| |
| @Nullable |
| private static ChangeSignatureHandler getChangeSignatureHandler(Language language) { |
| return LanguageRefactoringSupport.INSTANCE.forLanguage(language).getChangeSignatureHandler(); |
| } |
| } |