/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* For further information about Alkacon Software GmbH, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.widgets;
import org.opencms.file.CmsObject;
import org.opencms.i18n.CmsEncoder;
import org.opencms.i18n.CmsLocaleManager;
import org.opencms.i18n.CmsMessages;
import org.opencms.util.CmsMacroResolver;
import org.opencms.util.CmsStringUtil;
import org.opencms.util.I_CmsMacroResolver;
import org.opencms.xml.types.I_CmsXmlContentValue;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Provides a standard HTML form input widget for overwriting localized values of a resource bundle, for use on a widget dialog.<p>
*
* The resource bundle is configured with the widget configuration attribute. An optional key name to look up in the bundle
* can be given, too, in case it is different from the element name: <code>key=mykey</code>.<p>
*
* The locale to get the value for can be configured, too, by adding a configuration directive: <code>locale=en</code>.<p>
*
* Example: <code><layout element="elemname" widget="LocalizationWidget" configuration="org.opencms.workplace.messages|key=mykey|locale=en" /></code>.<p>
*
* To use the stored localization values and have the values of the resource bundles as fallback,
* use the {@link org.opencms.xml.CmsXmlMessages} object.<p>
*
* @since 6.5.4
*/
public class CmsLocalizationWidget extends A_CmsWidget {
/** The option for the localized key name. */
public static final String OPTION_KEY = "key=";
/** The option for the locale to use. */
public static final String OPTION_LOCALE = "locale=";
/** Pattern to get OpenCms like macros, e.g. "%(0)". */
private static Pattern PATTERN_MACRO = Pattern.compile(".*("
+ I_CmsMacroResolver.MACRO_DELIMITER
+ "\\"
+ I_CmsMacroResolver.MACRO_START
+ ")(\\d*)(\\"
+ I_CmsMacroResolver.MACRO_END
+ ").*");
/** Pattern to get message bundle arguments, e.g. "{0}". */
private static Pattern PATTERN_MESSAGEARGUMENT = Pattern.compile(".*(\\{)(\\d*)(\\}).*");
/** The bundle key (optional, if not equal to the element name). */
private String m_bundleKey;
/** The locale to get the value for. */
private Locale m_locale;
/** The localized bundle to get the value from. */
private CmsMessages m_messages;
/**
* Creates a new input localization widget.<p>
*/
public CmsLocalizationWidget() {
// empty constructor is required for class registration
this("");
}
/**
* Creates a new input localization widget with the given configuration.<p>
*
* @param configuration the configuration to use
*/
public CmsLocalizationWidget(String configuration) {
super(configuration);
}
/**
* @see org.opencms.widgets.I_CmsWidget#getDialogWidget(org.opencms.file.CmsObject, org.opencms.widgets.I_CmsWidgetDialog, org.opencms.widgets.I_CmsWidgetParameter)
*/
public String getDialogWidget(CmsObject cms, I_CmsWidgetDialog widgetDialog, I_CmsWidgetParameter param) {
String id = param.getId();
// initialize bundle
initConfiguration(cms, param);
StringBuffer result = new StringBuffer(256);
result.append("<td class=\"xmlTd\">");
result.append("<input class=\"xmlInput textInput");
if (param.hasError()) {
result.append(" xmlInputError");
}
result.append("\"");
result.append(" name=\"");
result.append(id);
result.append("\" id=\"");
result.append(id);
result.append("\" value=\"");
// determine value to show in editor
String value = m_messages.key(m_bundleKey);
if ((CmsStringUtil.isNotEmptyOrWhitespaceOnly(param.getStringValue(cms)) && !value.equals(param.getStringValue(cms)))
|| value.startsWith(CmsMessages.UNKNOWN_KEY_EXTENSION)) {
// saved value is provided and different from localized value in bundle or no value found in bundle, use it
value = param.getStringValue(cms);
// replace OpenCms macro syntax with message bundle arguments
Matcher matcher = PATTERN_MACRO.matcher(value);
while (matcher.matches()) {
int startIndex = matcher.start(1);
int endIndex = matcher.end(3);
String number = matcher.group(2);
value = value.substring(0, startIndex) + "{" + number + "}" + value.substring(endIndex);
matcher = PATTERN_MACRO.matcher(value);
}
}
result.append(CmsEncoder.escapeXml(value));
result.append("\">");
result.append("</td>");
return result.toString();
}
/**
* @see org.opencms.widgets.I_CmsWidget#newInstance()
*/
public I_CmsWidget newInstance() {
return new CmsLocalizationWidget(getConfiguration());
}
/**
* @see org.opencms.widgets.I_CmsWidget#setEditorValue(org.opencms.file.CmsObject, java.util.Map, org.opencms.widgets.I_CmsWidgetDialog, org.opencms.widgets.I_CmsWidgetParameter)
*/
@Override
public void setEditorValue(
CmsObject cms,
Map<String, String[]> formParameters,
I_CmsWidgetDialog widgetDialog,
I_CmsWidgetParameter param) {
String[] values = formParameters.get(param.getId());
if ((values != null) && (values.length > 0)) {
// initialize bundle
initConfiguration(cms, param);
String value = m_messages.key(m_bundleKey);
if (value.equals(values[0].trim())) {
// value is equal to localized value, do not save
value = "";
} else {
// value is different, save it
value = values[0];
// now replace message bundle like argument placeholders like "{0}" with OpenCms macros
Matcher matcher = PATTERN_MESSAGEARGUMENT.matcher(value);
while (matcher.matches()) {
int startIndex = matcher.start(1);
int endIndex = matcher.end(3);
String number = CmsMacroResolver.formatMacro(matcher.group(2));
// replace arguments with macros
value = value.substring(0, startIndex) + number + value.substring(endIndex);
matcher = PATTERN_MESSAGEARGUMENT.matcher(value);
}
}
param.setStringValue(cms, value);
}
}
/**
* Initializes the localized bundle to get the value from, the optional key name and the optional locale.<p>
*
* @param cms an initialized instance of a CmsObject
* @param param the widget parameter to generate the widget for
*/
protected void initConfiguration(CmsObject cms, I_CmsWidgetParameter param) {
// set the default bundle key
m_bundleKey = param.getName();
// set the default locale for XML contents
m_locale = cms.getRequestContext().getLocale();
try {
I_CmsXmlContentValue value = (I_CmsXmlContentValue)param;
m_locale = value.getLocale();
} catch (Exception e) {
// ignore, this is no XML content
}
// check the message bundle
if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(getConfiguration())) {
//initialize messages, the optional bundle key name and the optional locale from configuration String
String bundleName = "";
List<String> configs = CmsStringUtil.splitAsList(getConfiguration(), '|');
Iterator<String> i = configs.iterator();
while (i.hasNext()) {
String config = i.next();
if (config.startsWith(OPTION_KEY)) {
m_bundleKey = config.substring(OPTION_KEY.length());
} else if (config.startsWith(OPTION_LOCALE)) {
m_locale = CmsLocaleManager.getLocale(config.substring(OPTION_LOCALE.length()));
} else {
bundleName = config;
}
}
// create messages object
m_messages = new CmsMessages(bundleName, m_locale);
} else {
// initialize empty messages object to avoid NPE
m_messages = new CmsMessages("", m_locale);
}
}
}