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/*
* Copyright 2003-2006 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.trivialif;
import com.intellij.psi.*;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.IncorrectOperationException;
import com.siyeh.ipp.base.Intention;
import com.siyeh.ipp.base.PsiElementPredicate;
import com.siyeh.ipp.psiutils.ParenthesesUtils;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.NonNls;
public class MergeIfOrIntention extends Intention {
@NotNull
public PsiElementPredicate getElementPredicate() {
return new MergeIfOrPredicate();
}
public void processIntention(PsiElement element)
throws IncorrectOperationException {
final PsiJavaToken token = (PsiJavaToken)element;
if (MergeIfOrPredicate.isMergableExplicitIf(token)) {
replaceMergeableExplicitIf(token);
}
else {
replaceMergeableImplicitIf(token);
}
}
private static void replaceMergeableExplicitIf(PsiJavaToken token)
throws IncorrectOperationException {
final PsiIfStatement parentStatement =
(PsiIfStatement)token.getParent();
assert parentStatement != null;
final PsiIfStatement childStatement =
(PsiIfStatement)parentStatement.getElseBranch();
if (childStatement == null) {
return;
}
final PsiExpression childCondition = childStatement.getCondition();
if (childCondition == null) {
return;
}
final String childConditionText;
if (ParenthesesUtils.getPrecedence(childCondition)
> ParenthesesUtils.OR_PRECEDENCE) {
childConditionText = '(' + childCondition.getText() + ')';
}
else {
childConditionText = childCondition.getText();
}
final PsiExpression condition = parentStatement.getCondition();
if (condition == null) {
return;
}
final String parentConditionText;
if (ParenthesesUtils.getPrecedence(condition)
> ParenthesesUtils.OR_PRECEDENCE) {
parentConditionText = '(' + condition.getText() + ')';
}
else {
parentConditionText = condition.getText();
}
final PsiStatement parentThenBranch = parentStatement.getThenBranch();
if (parentThenBranch == null) {
return;
}
final String parentThenBranchText = parentThenBranch.getText();
@NonNls final StringBuilder statement = new StringBuilder();
statement.append("if(");
statement.append(parentConditionText);
statement.append("||");
statement.append(childConditionText);
statement.append(')');
statement.append(parentThenBranchText);
final PsiStatement childElseBranch = childStatement.getElseBranch();
if (childElseBranch != null) {
final String childElseBranchText = childElseBranch.getText();
statement.append("else ");
statement.append(childElseBranchText);
}
final String newStatement = statement.toString();
replaceStatement(newStatement, parentStatement);
}
private static void replaceMergeableImplicitIf(PsiJavaToken token)
throws IncorrectOperationException {
final PsiIfStatement parentStatement =
(PsiIfStatement)token.getParent();
final PsiIfStatement childStatement =
(PsiIfStatement)PsiTreeUtil.skipSiblingsForward(parentStatement,
PsiWhiteSpace.class);
assert childStatement != null;
final PsiExpression childCondition = childStatement.getCondition();
if (childCondition == null) {
return;
}
final String childConditionText;
if (ParenthesesUtils.getPrecedence(childCondition)
> ParenthesesUtils.OR_PRECEDENCE) {
childConditionText = '(' + childCondition.getText() + ')';
}
else {
childConditionText = childCondition.getText();
}
assert parentStatement != null;
final PsiExpression condition = parentStatement.getCondition();
if (condition == null) {
return;
}
final String parentConditionText;
if (ParenthesesUtils.getPrecedence(condition)
> ParenthesesUtils.OR_PRECEDENCE) {
parentConditionText = '(' + condition.getText() + ')';
}
else {
parentConditionText = condition.getText();
}
final PsiStatement parentThenBranch = parentStatement.getThenBranch();
if (parentThenBranch == null) {
return;
}
final StringBuilder newStatement = new StringBuilder();
newStatement.append("if(");
newStatement.append(parentConditionText);
newStatement.append("||");
newStatement.append(childConditionText);
newStatement.append(')');
newStatement.append(parentThenBranch.getText());
final PsiStatement childElseBranch = childStatement.getElseBranch();
if (childElseBranch != null) {
newStatement.append("else ");
newStatement.append(childElseBranch.getText());
}
replaceStatement(newStatement.toString(), parentStatement);
childStatement.delete();
}
}
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