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/*
* Copyright 2000-2014 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.codeInsight.daemon.impl.HighlightInfo;
import com.intellij.codeInsight.intention.IntentionAction;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Comparing;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.*;
import com.intellij.psi.infos.CandidateInfo;
import com.intellij.psi.infos.MethodCandidateInfo;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.HashSet;
import java.util.Set;
import static com.intellij.psi.CommonClassNames.JAVA_LANG_STRING;
public class ChangeStringLiteralToCharInMethodCallFix implements IntentionAction {
private final PsiLiteralExpression myLiteral;
private final PsiCall myCall;
public ChangeStringLiteralToCharInMethodCallFix(final PsiLiteralExpression literal, final PsiCall methodCall) {
myLiteral = literal;
myCall = methodCall;
}
@Override
@NotNull
public String getText() {
final String convertedValue = convertedValue();
final boolean isString = isString(myLiteral.getType());
return QuickFixBundle.message("fix.single.character.string.to.char.literal.text", myLiteral.getText(),
quote(convertedValue, ! isString), isString ? PsiType.CHAR.getCanonicalText() : "String");
}
@Override
@NotNull
public String getFamilyName() {
return QuickFixBundle.message("fix.single.character.string.to.char.literal.family");
}
@Override
public boolean isAvailable(@NotNull final Project project, final Editor editor, final PsiFile file) {
return myCall.isValid() && myLiteral.isValid() && myCall.getManager().isInProject(myCall);
}
@Override
public void invoke(@NotNull final Project project, final Editor editor, final PsiFile file) throws IncorrectOperationException {
if (!FileModificationService.getInstance().prepareFileForWrite(file)) return;
final Object value = myLiteral.getValue();
if (value != null && value.toString().length() == 1) {
final PsiElementFactory factory = JavaPsiFacade.getInstance(project).getElementFactory();
final PsiExpression newExpression = factory.createExpressionFromText(quote(convertedValue(), ! isString(myLiteral.getType())),
myLiteral.getParent());
myLiteral.replace(newExpression);
}
}
@Override
public boolean startInWriteAction() {
return true;
}
private static String quote(final String value, final boolean doubleQuotes) {
final char quote = doubleQuotes ? '"' : '\'';
return quote + value + quote;
}
private String convertedValue() {
String value = String.valueOf(myLiteral.getValue());
final StringBuilder builder = new StringBuilder();
StringUtil.escapeStringCharacters(value.length(), value, "\"'", builder);
return builder.toString();
}
public static void registerFixes(@NotNull final PsiMethod[] candidates, @NotNull final PsiConstructorCall call,
@NotNull final HighlightInfo out) {
final Set<PsiLiteralExpression> literals = new HashSet<PsiLiteralExpression>();
if (call.getArgumentList() == null) {
return;
}
boolean exactMatch = false;
for (PsiMethod method : candidates) {
exactMatch |= findMatchingExpressions(call.getArgumentList().getExpressions(), method, literals);
}
if (! exactMatch) {
processLiterals(literals, call, out);
}
}
public static void registerFixes(@NotNull final CandidateInfo[] candidates,
@NotNull final PsiMethodCallExpression methodCall,
@Nullable final HighlightInfo info) {
if (info == null) return;
final Set<PsiLiteralExpression> literals = new HashSet<PsiLiteralExpression>();
boolean exactMatch = false;
for (CandidateInfo candidate : candidates) {
if (candidate instanceof MethodCandidateInfo) {
final PsiMethod method = ((MethodCandidateInfo) candidate).getElement();
exactMatch |= findMatchingExpressions(methodCall.getArgumentList().getExpressions(), method, literals);
}
}
if (!exactMatch) {
processLiterals(literals, methodCall, info);
}
}
private static void processLiterals(@NotNull final Set<PsiLiteralExpression> literals,
@NotNull final PsiCall call,
@NotNull final HighlightInfo info) {
for (PsiLiteralExpression literal : literals) {
final ChangeStringLiteralToCharInMethodCallFix fix = new ChangeStringLiteralToCharInMethodCallFix(literal, call);
QuickFixAction.registerQuickFixAction(info, fix);
}
}
/**
* @return <code>true</code> if exact TYPEs match
*/
private static boolean findMatchingExpressions(final PsiExpression[] arguments, final PsiMethod existingMethod,
final Set<PsiLiteralExpression> result) {
final PsiParameterList parameterList = existingMethod.getParameterList();
final PsiParameter[] parameters = parameterList.getParameters();
if (arguments.length != parameters.length) {
return false;
}
boolean typeMatch = true;
for (int i = 0; i < parameters.length && i < arguments.length; i++) {
final PsiParameter parameter = parameters[i];
final PsiType parameterType = parameter.getType();
final PsiType argumentType = arguments[i].getType();
typeMatch &= Comparing.equal(parameterType, argumentType);
if (arguments[i] instanceof PsiLiteralExpression && ! result.contains(arguments[i]) &&
(charToString(parameterType, argumentType) || charToString(argumentType, parameterType))) {
final String value = String.valueOf(((PsiLiteralExpression) arguments[i]).getValue());
if (value != null && value.length() == 1) {
result.add((PsiLiteralExpression) arguments[i]);
}
}
}
return typeMatch;
}
private static boolean charToString(final PsiType firstType, final PsiType secondType) {
return Comparing.equal(PsiType.CHAR, firstType) && isString(secondType);
}
private static boolean isString(final PsiType type) {
return type != null && type.equalsToText(JAVA_LANG_STRING);
}
}
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