org.codenarc.rule.formatting.TrailingWhitespaceRule.groovy Maven / Gradle / Ivy

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The CodeNarc project provides a static analysis tool for Groovy code.

There is a newer version: 3.5.0-groovy-4.0

/*
 * Copyright 2014 the original author or authors.
 *
 * 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.codenarc.rule.formatting

import org.codenarc.rule.AbstractRule
import org.codenarc.source.SourceCode

/**
 * Checks that no lines of source code end with whitespace characters.
 *
 * @author Joe Sondow
 */
class TrailingWhitespaceRule extends AbstractRule {

    String name = 'TrailingWhitespace'
    int priority = 3

    @Override
    void applyTo(SourceCode sourceCode, List violations) {
        def matcher = sourceCode.getText() =~ /[^\n]*[ \t]+\n/
        while (matcher.find()) {
            def lineNumber = sourceCode.getLineNumberForCharacterIndex(matcher.start())
            violations.add(createViolation(lineNumber, matcher.group(), 'Line ends with whitespace characters'))
        }
    }
}