/*
* =============================================================================
*
* Copyright (c) 2011-2014, The THYMELEAF team (http://www.thymeleaf.org)
*
* 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.thymeleaf.standard.inliner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.thymeleaf.Arguments;
import org.thymeleaf.Configuration;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.dom.AbstractTextNode;
import org.thymeleaf.exceptions.TemplateProcessingException;
import org.thymeleaf.standard.expression.IStandardExpression;
import org.thymeleaf.standard.expression.IStandardExpressionParser;
import org.thymeleaf.standard.expression.StandardExpressions;
import org.unbescape.html.HtmlEscape;
/**
*
* @author Daniel Fernández
*
* @since 1.0
*
*/
public class StandardTextTextInliner implements IStandardTextInliner {
private static final Logger logger = LoggerFactory.getLogger(StandardTextTextInliner.class);
public static final StandardTextTextInliner INSTANCE = new StandardTextTextInliner();
public static final String TEXT_INLINE_EVAL = "\\[\\[(.*?)\\]\\]";
public static final Pattern TEXT_INLINE_EVAL_PATTERN = Pattern.compile(TEXT_INLINE_EVAL, Pattern.DOTALL);
public static final String SCRIPT_INLINE_PREFIX = "[[";
public static final String SCRIPT_INLINE_SUFFIX = "]]";
private StandardTextTextInliner() {
super();
}
public void inline(final Arguments arguments, final AbstractTextNode text) {
final String content = text.getOriginalContent();
final String textContent =
processTextInline(content, arguments);
text.setContent(textContent, true);
}
static String processTextInline(
final String input, final Arguments arguments) {
if (input == null || input.length() == 0) {
return input;
}
final Matcher matcher = TEXT_INLINE_EVAL_PATTERN.matcher(input);
if (matcher.find()) {
final Configuration configuration = arguments.getConfiguration();
final IStandardExpressionParser expressionParser = StandardExpressions.getExpressionParser(configuration);
final StringBuilder strBuilder = new StringBuilder();
int curr = 0;
do {
strBuilder.append(input.substring(curr,matcher.start(0)));
final String match = HtmlEscape.unescapeHtml(matcher.group(1));
if (logger.isTraceEnabled()) {
logger.trace("[THYMELEAF][{}] Applying text inline evaluation on \"{}\"", TemplateEngine.threadIndex(), match);
}
try {
final IStandardExpression expression =
expressionParser.parseExpression(configuration, arguments, match);
final Object result = expression.execute(configuration, arguments);
strBuilder.append(HtmlEscape.escapeHtml4Xml(String.valueOf(result)));
} catch (final TemplateProcessingException ignored) {
// If it is not a standard expression, just output it as original
strBuilder.append(SCRIPT_INLINE_PREFIX).append(match).append(SCRIPT_INLINE_SUFFIX);
}
curr = matcher.end(0);
} while (matcher.find());
strBuilder.append(input.substring(curr));
return strBuilder.toString();
}
return input;
}
}