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/*
* Copyright 2000-2009 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.daemon.impl.quickfix;
import com.intellij.codeInsight.FileModificationService;
import com.intellij.codeInsight.daemon.QuickFixBundle;
import com.intellij.codeInspection.LocalQuickFixAndIntentionActionOnPsiElement;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Comparing;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiMethod;
import com.intellij.psi.PsiParameter;
import com.intellij.refactoring.changeSignature.ChangeSignatureProcessor;
import com.intellij.refactoring.changeSignature.ParameterInfoImpl;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.ArrayList;
import java.util.List;
public class RemoveUnusedParameterFix extends LocalQuickFixAndIntentionActionOnPsiElement {
private final String myName;
public RemoveUnusedParameterFix(PsiParameter parameter) {
super(parameter);
myName = parameter.getName();
}
@NotNull
@Override
public String getText() {
return QuickFixBundle.message("remove.unused.parameter.text", myName);
}
@Override
@NotNull
public String getFamilyName() {
return QuickFixBundle.message("remove.unused.parameter.family");
}
@Override
public boolean isAvailable(@NotNull Project project,
@NotNull PsiFile file,
@NotNull PsiElement startElement,
@NotNull PsiElement endElement) {
final PsiParameter myParameter = (PsiParameter)startElement;
return
myParameter.isValid()
&& myParameter.getDeclarationScope() instanceof PsiMethod
&& myParameter.getManager().isInProject(myParameter);
}
@Override
public void invoke(@NotNull Project project,
@NotNull PsiFile file,
@Nullable("is null when called from inspection") Editor editor,
@NotNull PsiElement startElement,
@NotNull PsiElement endElement) {
final PsiParameter myParameter = (PsiParameter)startElement;
if (!FileModificationService.getInstance().prepareFileForWrite(myParameter.getContainingFile())) return;
removeReferences(myParameter);
}
private static void removeReferences(PsiParameter parameter) {
PsiMethod method = (PsiMethod) parameter.getDeclarationScope();
ChangeSignatureProcessor processor = new ChangeSignatureProcessor(parameter.getProject(),
method,
false, null,
method.getName(),
method.getReturnType(),
getNewParametersInfo(method, parameter));
processor.run();
}
public static ParameterInfoImpl[] getNewParametersInfo(PsiMethod method, PsiParameter parameterToRemove) {
List<ParameterInfoImpl> result = new ArrayList<ParameterInfoImpl>();
PsiParameter[] parameters = method.getParameterList().getParameters();
for (int i = 0; i < parameters.length; i++) {
PsiParameter parameter = parameters[i];
if (!Comparing.equal(parameter, parameterToRemove)) {
result.add(new ParameterInfoImpl(i, parameter.getName(), parameter.getType()));
}
}
return result.toArray(new ParameterInfoImpl[result.size()]);
}
@Override
public boolean startInWriteAction() {
return false;
}
}
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