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/*
* Copyright 2000-2011 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.refactoring.changeSignature;
import com.intellij.lang.Language;
import com.intellij.lang.StdLanguages;
import com.intellij.openapi.application.Result;
import com.intellij.openapi.command.WriteCommandAction;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.*;
import com.intellij.psi.impl.light.LightModifierList;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
/**
* User: anna
* Date: Sep 6, 2010
*/
public class JavaChangeSignatureDetector implements LanguageChangeSignatureDetector {
private static final Logger LOG = Logger.getInstance("#" + JavaChangeSignatureDetector.class.getName());
@Override
public ChangeInfo createInitialChangeInfo(final @NotNull PsiElement element) {
final PsiMethod method = PsiTreeUtil.getParentOfType(element, PsiMethod.class, false);
if (method != null && isInsideMethodSignature(element, method)) {
//do not initialize change signature on return type change
if (element.getTextRange().getEndOffset() <= method.getTextOffset()) return null;
return DetectedJavaChangeInfo.createFromMethod(method);
} else {
final PsiVariable variable = PsiTreeUtil.getParentOfType(element, PsiVariable.class);
if (variable != null) {
return new RenameChangeInfo(variable, null) {
@Override
public Language getLanguage() {
return StdLanguages.JAVA;
}
};
}
}
return null;
}
@Override
public boolean performChange(final ChangeInfo changeInfo, ChangeInfo initialChangeInfo, @NotNull final String oldText, boolean silently) {
if (changeInfo instanceof DetectedJavaChangeInfo) {
return ((DetectedJavaChangeInfo)changeInfo).perform(initialChangeInfo, oldText, silently);
} else if (changeInfo instanceof RenameChangeInfo) {
((RenameChangeInfo)changeInfo).perform();
return true;
}
return false;
}
@Override
public boolean isChangeSignatureAvailableOnElement(PsiElement element, ChangeInfo currentInfo) {
if (currentInfo instanceof RenameChangeInfo) {
final PsiElement nameIdentifier = ((RenameChangeInfo)currentInfo).getNameIdentifier();
if (nameIdentifier != null) {
final TextRange nameIdentifierTextRange = nameIdentifier.getTextRange();
return nameIdentifierTextRange.contains(element.getTextRange()) ||
nameIdentifierTextRange.getEndOffset() == element.getTextOffset();
}
}
else if (currentInfo instanceof JavaChangeInfo) {
final PsiMethod method = (PsiMethod)currentInfo.getMethod();
return getSignatureRange(method).contains(element.getTextRange());
}
return false;
}
@Override
public boolean ignoreChanges(PsiElement element) {
if (element instanceof PsiMethod) return true;
return PsiTreeUtil.getParentOfType(element, PsiImportList.class) != null;
}
@Nullable
@Override
public TextRange getHighlightingRange(ChangeInfo changeInfo) {
if (changeInfo == null) return null;
if (changeInfo instanceof RenameChangeInfo) {
PsiElement nameIdentifier = ((RenameChangeInfo)changeInfo).getNameIdentifier();
return nameIdentifier != null ? nameIdentifier.getTextRange() : null;
}
PsiElement method = changeInfo.getMethod();
return method instanceof PsiMethod ? getSignatureRange((PsiMethod)method) : null;
}
@Nullable
@Override
public String extractSignature(PsiElement element, @NotNull ChangeInfo initialChangeInfo) {
final PsiMethod method = PsiTreeUtil.getParentOfType(element, PsiMethod.class, false);
if (method != null && isInsideMethodSignature(element, method) && method == initialChangeInfo.getMethod()) {
final TextRange signatureRange = getSignatureRange(method);
return element.getContainingFile().getText().substring(signatureRange.getStartOffset(), signatureRange.getEndOffset());
} else if (element instanceof PsiIdentifier && element.getParent() instanceof PsiNamedElement) {
return element.getText();
}
return null;
}
@Override
public ChangeInfo createNextChangeInfo(String signature, @NotNull final ChangeInfo currentInfo, String initialName) {
final Project project = currentInfo.getMethod().getProject();
if (currentInfo instanceof RenameChangeInfo) {
return currentInfo;
}
final PsiMethod oldMethod = (PsiMethod)currentInfo.getMethod();
String visibility = "";
PsiClass containingClass = oldMethod.getContainingClass();
if (containingClass != null && containingClass.isInterface()) {
visibility = PsiModifier.PUBLIC + " ";
}
PsiMethod method = JavaPsiFacade.getElementFactory(project).createMethodFromText((visibility + signature).trim(), oldMethod);
return ((DetectedJavaChangeInfo)currentInfo).createNextInfo(method);
}
private static boolean isInsideMethodSignature(PsiElement element, @NotNull PsiMethod method) {
final PsiCodeBlock body = method.getBody();
final TextRange textRange = element.getTextRange();
final PsiModifierList psiModifierList = method.getModifierList();
if (psiModifierList instanceof LightModifierList) return false;
if (body != null) {
return textRange.getEndOffset() <= body.getTextOffset() && textRange.getStartOffset() >= psiModifierList.getTextRange().getEndOffset();
}
return textRange.getStartOffset() >= psiModifierList.getTextRange().getEndOffset() &&
textRange.getEndOffset() <= method.getTextRange().getEndOffset();
}
public static TextRange getSignatureRange(PsiMethod method) {
final PsiCodeBlock body = method.getBody();
if (body != null) {
return new TextRange(method.getTextRange().getStartOffset(), body.getTextOffset());
}
return new TextRange(method.getTextRange().getStartOffset(),
method.getTextRange().getEndOffset());
}
@Override
public boolean isMoveParameterAvailable(PsiElement element, boolean left) {
if (element instanceof PsiParameter) {
final PsiParameter parameter = (PsiParameter)element;
final PsiElement declarationScope = parameter.getDeclarationScope();
if (declarationScope instanceof PsiMethod) {
final PsiMethod method = (PsiMethod)declarationScope;
final int parameterIndex = method.getParameterList().getParameterIndex(parameter);
if (left) {
return parameterIndex > 0;
} else {
return parameterIndex < method.getParameterList().getParametersCount() - 1;
}
}
}
return false;
}
@Override
public void moveParameter(final PsiElement element, final Editor editor, final boolean left) {
final PsiParameter parameter = (PsiParameter)element;
final PsiMethod method = (PsiMethod)parameter.getDeclarationScope();
final int parameterIndex = method.getParameterList().getParameterIndex(parameter);
new WriteCommandAction(element.getProject(), MOVE_PARAMETER){
@Override
protected void run(Result result) throws Throwable {
final PsiParameterList parameterList = method.getParameterList();
final PsiParameter[] parameters = parameterList.getParameters();
final int deltaOffset = editor.getCaretModel().getOffset() - parameter.getTextRange().getStartOffset();
final PsiParameter frst = left ? parameters[parameterIndex - 1] : parameter;
final PsiParameter scnd = left ? parameter : parameters[parameterIndex + 1];
final int startOffset = frst.getTextRange().getStartOffset();
final int endOffset = scnd.getTextRange().getEndOffset();
final PsiFile file = method.getContainingFile();
final Document document = PsiDocumentManager.getInstance(getProject()).getDocument(file);
if (document != null) {
final String comma_whitespace_between =
document.getText().substring(frst.getTextRange().getEndOffset(), scnd.getTextRange().getStartOffset());
document.replaceString(startOffset, endOffset, scnd.getText() + comma_whitespace_between + frst.getText());
editor.getCaretModel().moveToOffset(document.getText().indexOf(parameter.getText(), startOffset) + deltaOffset);
}
}
}.execute();
}
}
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