/*
* Minify Maven Plugin
* https://github.com/samaxes/minify-maven-plugin
*
* Copyright (c) 2009 samaxes.com
*
* 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.samaxes.maven.minify.common;
import org.apache.maven.plugin.logging.Log;
import org.mozilla.javascript.ErrorReporter;
import org.mozilla.javascript.EvaluatorException;
/**
* A Rhino compatible error reporter.
*/
public class JavaScriptErrorReporter implements ErrorReporter {
private Log log;
private String filename;
/**
* Error reporter constructor.
*
* @param log Maven plugin log
* @param filename JavaScript source file name
*/
public JavaScriptErrorReporter(Log log, String filename) {
this.log = log;
this.filename = filename;
}
/**
* Reports a warning.
*
* @param message a String describing the warning
* @param sourceName a String describing the JavaScript source where the warning occurred; typically a file name or
* URL
* @param line the line number associated with the warning
* @param lineSource the text of the line (may be null)
* @param lineOffset the offset into lineSource where problem was detected
*/
@Override
public void warning(String message, String sourceName, int line, String lineSource, int lineOffset) {
log.warn(constructMessage(message, sourceName, line, lineSource, lineOffset));
}
/**
* Reports an error. If execution has not yet begun, the JavaScript engine is free to find additional errors rather
* than terminating the translation. However, it will not execute a script that had errors.
*
* @param message a String describing the warning
* @param sourceName a String describing the JavaScript source where the warning occurred; typically a file name or
* URL
* @param line the line number associated with the warning
* @param lineSource the text of the line (may be null)
* @param lineOffset the offset into lineSource where problem was detected
*/
@Override
public void error(String message, String sourceName, int line, String lineSource, int lineOffset) {
log.error(constructMessage(message, sourceName, line, lineSource, lineOffset));
}
/**
* Creates an EvaluatorException that may be thrown. runtimeErrors, unlike errors, will always terminate the current
* script.
*
* @param message a String describing the warning
* @param sourceName a String describing the JavaScript source where the warning occurred; typically a file name or
* URL
* @param line the line number associated with the warning
* @param lineSource the text of the line (may be null)
* @param lineOffset the offset into lineSource where problem was detected
*/
@Override
public EvaluatorException runtimeError(String message, String sourceName, int line, String lineSource,
int lineOffset) {
log.error(message);
return new EvaluatorException(message, sourceName, line, lineSource, lineOffset);
}
private String constructMessage(String message, String sourceName, int line, String lineSource, int lineOffset) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append(message).append(" at ");
if (sourceName != null) {
stringBuilder.append(sourceName);
} else if (filename != null) {
stringBuilder.append(filename);
} else {
stringBuilder.append("(unknown source)");
}
stringBuilder.append(" line ");
if (line > 0) {
stringBuilder.append(line);
} else {
stringBuilder.append("(unknown line)");
}
stringBuilder.append(":");
if (lineOffset >= 0) {
stringBuilder.append(lineOffset);
} else {
stringBuilder.append("(unknown column)");
}
if (lineSource != null) {
stringBuilder.append('\n');
stringBuilder.append(lineSource);
if (lineOffset >= 0 && lineOffset <= lineSource.length()) {
stringBuilder.append('\n');
for (int i = 0; i < lineOffset; i++) {
char c = lineSource.charAt(i);
if (Character.isWhitespace(c)) {
stringBuilder.append(c);
} else {
stringBuilder.append(' ');
}
}
stringBuilder.append("^\n");
}
}
return stringBuilder.toString();
}
}