/*
* Copyright 2010-2015 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 org.jetbrains.kotlin.idea.codeInsight.unwrap;
import com.intellij.codeInsight.unwrap.AbstractUnwrapper;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiWhiteSpace;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.kotlin.idea.KotlinBundle;
import org.jetbrains.kotlin.idea.refactoring.ElementSelectionUtilsKt;
import org.jetbrains.kotlin.psi.KtBlockExpression;
import org.jetbrains.kotlin.psi.KtElement;
import org.jetbrains.kotlin.psi.KtExpression;
import java.util.List;
public abstract class KotlinUnwrapRemoveBase extends AbstractUnwrapper<KotlinUnwrapRemoveBase.Context> {
private final String key;
protected KotlinUnwrapRemoveBase(@NotNull String key) {
/*
Pass empty description to superclass since actual description
is computed based on the Psi element at hand
*/
super("");
this.key = key;
}
@Override
public String getDescription(PsiElement e) {
assert e instanceof KtElement;
return KotlinBundle.message(key, ElementSelectionUtilsKt.getExpressionShortText((KtElement) e));
}
protected boolean canExtractExpression(@NotNull KtExpression expression, @NotNull KtElement parent) {
if (expression instanceof KtBlockExpression) {
KtBlockExpression block = (KtBlockExpression) expression;
return block.getStatements().size() <= 1 || parent instanceof KtBlockExpression;
}
return true;
}
protected static class Context extends AbstractUnwrapper.AbstractContext {
@Override
protected boolean isWhiteSpace(PsiElement element) {
return element instanceof PsiWhiteSpace;
}
public void extractFromBlock(@NotNull KtBlockExpression block, @NotNull KtElement from) throws IncorrectOperationException {
List<KtExpression> expressions = block.getStatements();
if (!expressions.isEmpty()) {
extract(expressions.get(0), expressions.get(expressions.size() - 1), from);
}
}
public void extractFromExpression(@NotNull KtExpression expression, @NotNull KtElement from) throws IncorrectOperationException {
if (expression instanceof KtBlockExpression) {
extractFromBlock((KtBlockExpression) expression, from);
}
else {
extract(expression, expression, from);
}
}
public void replace(@NotNull KtElement originalElement, @NotNull KtElement newElement) {
if (myIsEffective) {
originalElement.replace(newElement);
}
}
}
@Override
protected Context createContext() {
return new Context();
}
}