| /* |
| * 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.codeInsight.intention; |
| |
| import com.intellij.codeInsight.intention.impl.BaseIntentionAction; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.util.IncorrectOperationException; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author Danila Ponomarenko |
| */ |
| public abstract class BaseElementAtCaretIntentionAction extends BaseIntentionAction { |
| private volatile boolean useElementToTheLeft = false; |
| |
| @Override |
| public final boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) { |
| if (!file.getManager().isInProject(file)) return false; |
| |
| useElementToTheLeft = false; |
| final PsiElement elementToTheRight = getElementToTheRight(editor, file); |
| if (elementToTheRight != null && isAvailable(project, editor, elementToTheRight)) { |
| return true; |
| } |
| |
| final PsiElement elementToTheLeft = getElementToTheLeft(editor, file); |
| if (elementToTheLeft != null && isAvailable(project, editor, elementToTheLeft)) { |
| useElementToTheLeft = true; |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Checks whether this intention is available at a caret offset in file. |
| * If this method returns true, a light bulb for this intention is shown. |
| * |
| * @param project the project in which the availability is checked. |
| * @param editor the editor in which the intention will be invoked. |
| * @param element the element under caret. |
| * @return true if the intention is available, false otherwise. |
| */ |
| public abstract boolean isAvailable(@NotNull Project project, Editor editor, @NotNull PsiElement element); |
| |
| @Override |
| public final void invoke(@NotNull Project project, Editor editor, PsiFile file) throws IncorrectOperationException { |
| final PsiElement element = useElementToTheLeft ? getElementToTheLeft(editor, file) : getElementToTheRight(editor,file); |
| if (element == null){ |
| return; |
| } |
| |
| invoke(project, editor, element); |
| } |
| |
| /** |
| * Invokes intention action for the element under cursor. |
| * |
| * @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 |
| * |
| */ |
| public abstract void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element) throws IncorrectOperationException; |
| |
| @Nullable |
| protected static PsiElement getElementToTheRight(Editor editor, @NotNull PsiFile file) { |
| return file.findElementAt(editor.getCaretModel().getOffset()); |
| } |
| |
| @Nullable |
| protected static PsiElement getElementToTheLeft(Editor editor, @NotNull PsiFile file) { |
| return file.findElementAt(editor.getCaretModel().getOffset() - 1); |
| } |
| |
| |
| } |