/*
* Copyright 2000-2017 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.plugins.groovy.intentions.conversions;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.DialogWrapper;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiField;
import com.intellij.psi.PsiReference;
import com.intellij.psi.search.searches.MethodReferencesSearch;
import com.intellij.refactoring.ui.ConflictsDialog;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.containers.HashSet;
import com.intellij.util.containers.MultiMap;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.plugins.groovy.GroovyLanguage;
import org.jetbrains.plugins.groovy.intentions.GroovyIntentionsBundle;
import org.jetbrains.plugins.groovy.intentions.base.Intention;
import org.jetbrains.plugins.groovy.intentions.base.PsiElementPredicate;
import org.jetbrains.plugins.groovy.lang.psi.GroovyPsiElementFactory;
import org.jetbrains.plugins.groovy.lang.psi.api.auxiliary.modifiers.GrModifier;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrVariableDeclaration;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrOpenBlock;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.GrTypeDefinitionBody;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.members.GrMethod;
import org.jetbrains.plugins.groovy.lang.psi.util.PsiUtil;
import java.util.Collection;
/**
* @author Maxim.Medvedev
*/
public class ConvertMethodToClosureIntention extends Intention {
private static final Logger LOG = Logger.getInstance("#org.jetbrains.plugins.groovy.intentions.conversions.ConvertMethodToclosureIntention");
@NotNull
@Override
protected PsiElementPredicate getElementPredicate() {
return new MyPredicate();
}
@Override
protected void processIntention(@NotNull PsiElement element, @NotNull Project project, Editor editor) throws IncorrectOperationException {
MultiMap<PsiElement, String> conflicts = new MultiMap<>();
final GrMethod method;
if (element.getParent() instanceof GrMethod) {
method = (GrMethod)element.getParent();
}
else {
final PsiReference ref = element.getReference();
LOG.assertTrue(ref != null);
final PsiElement resolved = ref.resolve();
LOG.assertTrue(resolved instanceof GrMethod);
method = (GrMethod)resolved;
}
final PsiClass containingClass = method.getContainingClass();
final String methodName = method.getName();
final PsiField field = containingClass.findFieldByName(methodName, true);
if (field != null) {
conflicts.putValue(field, GroovyIntentionsBundle.message("field.already.exists", methodName));
}
final Collection<PsiReference> references = MethodReferencesSearch.search(method).findAll();
final Collection<GrReferenceExpression> usagesToConvert = new HashSet<>(references.size());
for (PsiReference ref : references) {
final PsiElement psiElement = ref.getElement();
if (!GroovyLanguage.INSTANCE.equals(psiElement.getLanguage())) {
conflicts.putValue(psiElement, GroovyIntentionsBundle.message("method.is.used.outside.of.groovy"));
}
else if (!PsiUtil.isMethodUsage(psiElement)) {
if (psiElement instanceof GrReferenceExpression) {
if (((GrReferenceExpression)psiElement).hasMemberPointer()) {
usagesToConvert.add((GrReferenceExpression)psiElement);
}
}
}
}
if (!conflicts.isEmpty()) {
ConflictsDialog conflictsDialog = new ConflictsDialog(project, conflicts, () -> execute(method, usagesToConvert));
conflictsDialog.show();
if (conflictsDialog.getExitCode() != DialogWrapper.OK_EXIT_CODE) return;
}
execute(method, usagesToConvert);
}
private static void execute(final GrMethod method, final Collection<GrReferenceExpression> usagesToConvert) {
ApplicationManager.getApplication().runWriteAction(() -> {
GroovyPsiElementFactory factory = GroovyPsiElementFactory.getInstance(method.getProject());
StringBuilder builder = new StringBuilder(method.getTextLength());
String modifiers = method.getModifierList().getText();
if (modifiers.trim().isEmpty()) {
modifiers = GrModifier.DEF;
}
builder.append(modifiers).append(' ');
builder.append(method.getName()).append("={");
builder.append(method.getParameterList().getText()).append(" ->");
final GrOpenBlock block = method.getBlock();
builder.append(block.getText().substring(1));
final GrVariableDeclaration variableDeclaration =
GroovyPsiElementFactory.getInstance(method.getProject()).createFieldDeclarationFromText(builder.toString());
method.replace(variableDeclaration);
for (GrReferenceExpression element : usagesToConvert) {
final PsiElement qualifier = element.getQualifier();
final StringBuilder text = new StringBuilder(qualifier.getText());
element.setQualifier(null);
text.append('.').append(element.getText());
element.replace(factory.createExpressionFromText(text.toString()));
}
});
}
private static class MyPredicate implements PsiElementPredicate {
@Override
public boolean satisfiedBy(@NotNull PsiElement element) {
if (element.getLanguage() != GroovyLanguage.INSTANCE) return false;
GrMethod method;
final PsiReference ref = element.getReference();
if (ref != null) {
final PsiElement resolved = ref.resolve();
if (!(resolved instanceof GrMethod)) return false;
method = (GrMethod)resolved;
}
else {
final PsiElement parent = element.getParent();
if (!(parent instanceof GrMethod)) return false;
if (((GrMethod)parent).getNameIdentifierGroovy() != element) return false;
method = (GrMethod)parent;
}
return method.getBlock() != null && method.getParent() instanceof GrTypeDefinitionBody;
// return element instanceof GrMethod && ((GrMethod)element).getBlock() != null && element.getParent() instanceof GrTypeDefinitionBody;
}
}
}