/*
* 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.daemon.QuickFixBundle;
import com.intellij.codeInsight.daemon.impl.HighlightInfo;
import com.intellij.codeInsight.intention.IntentionAction;
import com.intellij.openapi.diagnostic.Logger;
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.infos.CandidateInfo;
import com.intellij.psi.infos.MethodCandidateInfo;
import com.intellij.psi.util.PsiUtil;
import com.intellij.psi.util.TypeConversionUtil;
import com.intellij.util.ArrayUtil;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
import java.util.ArrayList;
import java.util.List;
/**
* @author cdr
*/
public class PermuteArgumentsFix implements IntentionAction {
private static final Logger LOG = Logger.getInstance("#com.intellij.codeInsight.daemon.impl.quickfix.PermuteArgumentsFix");
private final PsiCall myCall;
private final PsiCall myPermutation;
private PermuteArgumentsFix(@NotNull PsiCall call, @NotNull PsiCall permutation) {
myCall = call;
myPermutation = permutation;
}
@Override
public boolean startInWriteAction() {
return true;
}
@Override
@NotNull
public String getText() {
return QuickFixBundle.message("permute.arguments");
}
@Override
@NotNull
public String getFamilyName() {
return getText();
}
@Override
public boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) {
return !project.isDisposed() && myCall.isValid() && myCall.getManager().isInProject(myCall);
}
@Override
public void invoke(@NotNull Project project, Editor editor, PsiFile file) throws IncorrectOperationException {
myCall.getArgumentList().replace(myPermutation.getArgumentList());
}
public static void registerFix(HighlightInfo info, PsiCall callExpression, final CandidateInfo[] candidates, final TextRange fixRange) {
PsiExpression[] expressions = callExpression.getArgumentList().getExpressions();
if (expressions.length < 2) return;
List<PsiCall> permutations = new ArrayList<>();
for (CandidateInfo candidate : candidates) {
if (candidate instanceof MethodCandidateInfo) {
MethodCandidateInfo methodCandidate = (MethodCandidateInfo)candidate;
PsiMethod method = methodCandidate.getElement();
PsiSubstitutor substitutor = methodCandidate.getSubstitutor();
PsiParameter[] parameters = method.getParameterList().getParameters();
if (expressions.length != parameters.length || parameters.length ==0) continue;
int minIncompatibleIndex = parameters.length;
int maxIncompatibleIndex = 0;
int incompatibilitiesCount = 0;
for (int i = 0; i < parameters.length; i++) {
PsiParameter parameter = parameters[i];
PsiType type = substitutor.substitute(parameter.getType());
if (TypeConversionUtil.areTypesAssignmentCompatible(type, expressions[i])) continue;
if (minIncompatibleIndex == parameters.length) minIncompatibleIndex = i;
maxIncompatibleIndex = i;
incompatibilitiesCount++;
}
try {
registerSwapFixes(expressions, callExpression, permutations, methodCandidate, incompatibilitiesCount, minIncompatibleIndex, maxIncompatibleIndex);
registerShiftFixes(expressions, callExpression, permutations, methodCandidate, minIncompatibleIndex, maxIncompatibleIndex);
}
catch (IncorrectOperationException e) {
LOG.error(e);
}
}
}
if (permutations.size() == 1) {
PermuteArgumentsFix fix = new PermuteArgumentsFix(callExpression, permutations.get(0));
QuickFixAction.registerQuickFixAction(info, fixRange, fix);
}
}
private static void registerShiftFixes(final PsiExpression[] expressions, final PsiCall callExpression, final List<PsiCall> permutations,
final MethodCandidateInfo methodCandidate, final int minIncompatibleIndex, final int maxIncompatibleIndex)
throws IncorrectOperationException {
PsiMethod method = methodCandidate.getElement();
PsiSubstitutor substitutor = methodCandidate.getSubstitutor();
// shift range should include both incompatible indexes
for (int i = 0; i <= minIncompatibleIndex; i++) {
for (int j = Math.max(i+2,maxIncompatibleIndex); j < expressions.length; j++) { // if j=i+1 the shift is equal to swap
{
ArrayUtil.rotateLeft(expressions, i, j);
if (PsiUtil.isApplicable(method, substitutor, expressions)) {
if (canShift(expressions, callExpression, permutations, i)) return;
}
ArrayUtil.rotateRight(expressions, i, j);
}
{
ArrayUtil.rotateRight(expressions, i, j);
if (PsiUtil.isApplicable(method, substitutor, expressions)) {
if (canShift(expressions, callExpression, permutations, i)) return;
}
ArrayUtil.rotateLeft(expressions, i, j);
}
}
}
}
private static boolean canShift(PsiExpression[] expressions, PsiCall callExpression, List<PsiCall> permutations, int i) {
PsiCall copy = LambdaUtil.copyTopLevelCall(callExpression);
if (copy == null) return false;
PsiExpressionList list = copy.getArgumentList();
if (list == null) return false;
PsiExpression[] copyExpressions = list.getExpressions();
for (int k = i; k < copyExpressions.length; k++) {
copyExpressions[k].replace(expressions[k]);
}
JavaResolveResult result = copy.resolveMethodGenerics();
if (result.getElement() != null && result.isValidResult()) {
permutations.add(copy);
if (permutations.size() > 1) return true;
}
return false;
}
private static void registerSwapFixes(final PsiExpression[] expressions, final PsiCall callExpression, final List<PsiCall> permutations,
MethodCandidateInfo candidate, final int incompatibilitiesCount, final int minIncompatibleIndex,
final int maxIncompatibleIndex) throws IncorrectOperationException {
PsiMethod method = candidate.getElement();
PsiSubstitutor substitutor = candidate.getSubstitutor();
if (incompatibilitiesCount >= 3) return; // no way we can fix it by swapping
for (int i = minIncompatibleIndex; i < maxIncompatibleIndex; i++) {
for (int j = i+1; j <= maxIncompatibleIndex; j++) {
ArrayUtil.swap(expressions, i, j);
if (PsiUtil.isApplicable(method, substitutor, expressions)) {
PsiCall copy = LambdaUtil.copyTopLevelCall(callExpression);
if (copy == null) return;
PsiExpressionList argumentList = copy.getArgumentList();
if (argumentList == null) return;
PsiExpression[] copyExpressions = argumentList.getExpressions();
copyExpressions[i].replace(expressions[i]);
copyExpressions[j].replace(expressions[j]);
JavaResolveResult result = copy.resolveMethodGenerics();
if (result.getElement() != null && result.isValidResult()) {
permutations.add(copy);
if (permutations.size() > 1) return;
}
}
ArrayUtil.swap(expressions, i, j);
}
}
}
}