| /* |
| * Copyright 2000-2013 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.siyeh.ig.bugs; |
| |
| import com.intellij.codeInspection.ui.SingleCheckboxOptionsPanel; |
| import com.intellij.psi.*; |
| import com.intellij.psi.tree.IElementType; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.psiutils.ExpressionUtils; |
| import com.siyeh.ig.psiutils.FormatUtils; |
| import org.jetbrains.annotations.Nls; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| |
| import javax.swing.*; |
| |
| /** |
| * @author Bas Leijdekkers |
| */ |
| public class StringConcatenationMissingWhitespaceInspection extends BaseInspection { |
| |
| @SuppressWarnings("PublicField") |
| public boolean ignoreNonStringLiterals = false; |
| |
| @Nls |
| @NotNull |
| @Override |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message("string.concatenation.missing.whitespace.display.name"); |
| } |
| |
| @NotNull |
| @Override |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message("string.concatenation.missing.whitespace.problem.descriptor"); |
| } |
| |
| @Override |
| public JComponent createOptionsPanel() { |
| return new SingleCheckboxOptionsPanel(InspectionGadgetsBundle.message("string.concatenation.missing.whitespace.option"), |
| this, "ignoreNonStringLiterals"); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new StringConcatenationMissingWhitespaceVisitor(); |
| } |
| |
| private class StringConcatenationMissingWhitespaceVisitor extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitPolyadicExpression(PsiPolyadicExpression expression) { |
| super.visitPolyadicExpression(expression); |
| final IElementType tokenType = expression.getOperationTokenType(); |
| if (!JavaTokenType.PLUS.equals(tokenType) || !ExpressionUtils.hasStringType(expression)) { |
| return; |
| } |
| final boolean formatCall = FormatUtils.isFormatCallArgument(expression); |
| final PsiExpression[] operands = expression.getOperands(); |
| PsiExpression lhs = operands[0]; |
| for (int i = 1; i < operands.length; i++) { |
| final PsiExpression rhs = operands[i]; |
| if (isMissingWhitespace(lhs, rhs, formatCall)) { |
| final PsiJavaToken token = expression.getTokenBeforeOperand(rhs); |
| if (token != null) { |
| registerError(token); |
| } |
| } |
| lhs = rhs; |
| } |
| } |
| |
| private boolean isMissingWhitespace(PsiExpression lhs, PsiExpression rhs, boolean formatCall) { |
| @NonNls final String lhsLiteral = ExpressionUtils.getLiteralString(lhs); |
| if (lhsLiteral != null) { |
| final int length = lhsLiteral.length(); |
| if (length == 0) { |
| return false; |
| } |
| if (formatCall && lhsLiteral.endsWith("%n")) { |
| return false; |
| } |
| final char c = lhsLiteral.charAt(length - 1); |
| if (Character.isWhitespace(c) || !Character.isLetterOrDigit(c)) { |
| return false; |
| } |
| } |
| else if (ignoreNonStringLiterals) { |
| return false; |
| } |
| @NonNls final String rhsLiteral = ExpressionUtils.getLiteralString(rhs); |
| if (rhsLiteral != null) { |
| if (rhsLiteral.isEmpty()) { |
| return false; |
| } |
| if (formatCall && rhsLiteral.startsWith("%n")) { |
| return false; |
| } |
| final char c = rhsLiteral.charAt(0); |
| if (Character.isWhitespace(c) || !Character.isLetterOrDigit(c)) { |
| return false; |
| } |
| } |
| else if (ignoreNonStringLiterals) { |
| return false; |
| } |
| return true; |
| } |
| } |
| } |