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/*
* Copyright 2003-2014 Dave Griffith, Bas Leijdekkers
*
* 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.siyeh.ipp.base;
import com.intellij.codeInsight.FileModificationService;
import com.intellij.codeInsight.intention.BaseElementAtCaretIntentionAction;
import com.intellij.lang.java.JavaLanguage;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.*;
import com.intellij.psi.codeStyle.CodeStyleManager;
import com.siyeh.IntentionPowerPackBundle;
import com.siyeh.ig.psiutils.ComparisonUtils;
import com.siyeh.ig.psiutils.ParenthesesUtils;
import com.siyeh.ipp.psiutils.BoolUtils;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public abstract class Intention extends BaseElementAtCaretIntentionAction {
private final PsiElementPredicate predicate;
/**
* @noinspection AbstractMethodCallInConstructor, OverridableMethodCallInConstructor
*/
protected Intention() {
predicate = getElementPredicate();
}
@Override
public void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element){
if (prepareForWriting() && !FileModificationService.getInstance().preparePsiElementsForWrite(element)) {
return;
}
final PsiElement matchingElement = findMatchingElement(element, editor);
if (matchingElement == null) {
return;
}
processIntention(editor, matchingElement);
}
protected boolean prepareForWriting() {
return true;
}
protected abstract void processIntention(@NotNull PsiElement element);
protected void processIntention(Editor editor, @NotNull PsiElement element) {
processIntention(element);
}
@NotNull
protected abstract PsiElementPredicate getElementPredicate();
protected static void replaceExpressionWithNegatedExpression(@NotNull PsiExpression newExpression, @NotNull PsiExpression expression){
final Project project = expression.getProject();
final PsiElementFactory factory = JavaPsiFacade.getElementFactory(project);
PsiExpression expressionToReplace = expression;
final String newExpressionText = newExpression.getText();
final String expString;
if (BoolUtils.isNegated(expression)) {
expressionToReplace = BoolUtils.findNegation(expression);
expString = newExpressionText;
}
else if (ComparisonUtils.isComparison(newExpression)) {
final PsiBinaryExpression binaryExpression = (PsiBinaryExpression)newExpression;
final String negatedComparison = ComparisonUtils.getNegatedComparison(binaryExpression.getOperationTokenType());
final PsiExpression lhs = binaryExpression.getLOperand();
final PsiExpression rhs = binaryExpression.getROperand();
assert rhs != null;
expString = lhs.getText() + negatedComparison + rhs.getText();
}
else {
if (ParenthesesUtils.getPrecedence(newExpression) > ParenthesesUtils.PREFIX_PRECEDENCE) {
expString = "!(" + newExpressionText + ')';
}
else {
expString = '!' + newExpressionText;
}
}
final PsiExpression newCall = factory.createExpressionFromText(expString, expression);
assert expressionToReplace != null;
final PsiElement insertedElement = expressionToReplace.replace(newCall);
final CodeStyleManager codeStyleManager = CodeStyleManager.getInstance(project);
codeStyleManager.reformat(insertedElement);
}
protected static void replaceExpressionWithNegatedExpressionString(@NotNull String newExpression, @NotNull PsiExpression expression) {
final Project project = expression.getProject();
final JavaPsiFacade psiFacade = JavaPsiFacade.getInstance(project);
final PsiElementFactory factory = psiFacade.getElementFactory();
PsiExpression expressionToReplace = expression;
final String expString;
if (BoolUtils.isNegated(expression)) {
expressionToReplace = BoolUtils.findNegation(expressionToReplace);
expString = newExpression;
}
else {
PsiElement parent = expressionToReplace.getParent();
while (parent instanceof PsiParenthesizedExpression) {
expressionToReplace = (PsiExpression)parent;
parent = parent.getParent();
}
expString = "!(" + newExpression + ')';
}
final PsiExpression newCall = factory.createExpressionFromText(expString, expression);
assert expressionToReplace != null;
final PsiElement insertedElement = expressionToReplace.replace(newCall);
final CodeStyleManager codeStyleManager = CodeStyleManager.getInstance(project);
codeStyleManager.reformat(insertedElement);
}
protected static void addStatementBefore(String newStatementText, PsiReturnStatement anchor) {
final Project project = anchor.getProject();
final PsiElementFactory factory = JavaPsiFacade.getElementFactory(project);
final PsiStatement newStatement = factory.createStatementFromText(newStatementText, anchor);
final PsiElement addedStatement = anchor.getParent().addBefore(newStatement, anchor);
CodeStyleManager.getInstance(project).reformat(addedStatement);
}
@Nullable
PsiElement findMatchingElement(@Nullable PsiElement element, Editor editor) {
while (element != null) {
if (!JavaLanguage.INSTANCE.equals(element.getLanguage())) {
break;
}
if (predicate instanceof PsiElementEditorPredicate) {
if (((PsiElementEditorPredicate)predicate).satisfiedBy(element, editor)) {
return element;
}
}
else if (predicate.satisfiedBy(element)) {
return element;
}
element = element.getParent();
if (element instanceof PsiFile) {
break;
}
}
return null;
}
@Override
public boolean isAvailable(@NotNull Project project, Editor editor, @NotNull PsiElement element) {
return findMatchingElement(element, editor) != null;
}
@Override
public boolean startInWriteAction() {
return true;
}
private String getPrefix() {
final Class<? extends Intention> aClass = getClass();
final String name = aClass.getSimpleName();
final StringBuilder buffer = new StringBuilder(name.length() + 10);
buffer.append(Character.toLowerCase(name.charAt(0)));
for (int i = 1; i < name.length(); i++) {
final char c = name.charAt(i);
if (Character.isUpperCase(c)) {
buffer.append('.');
buffer.append(Character.toLowerCase(c));
}
else {
buffer.append(c);
}
}
return buffer.toString();
}
@Override
@NotNull
public String getText() {
//noinspection UnresolvedPropertyKey
return IntentionPowerPackBundle.message(getPrefix() + ".name");
}
@NotNull
public String getFamilyName() {
//noinspection UnresolvedPropertyKey
return IntentionPowerPackBundle.defaultableMessage(getPrefix() + ".family.name");
}
}
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