/*
* 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.gwt.client.util;
import org.opencms.util.CmsStringUtil;
import com.google.gwt.core.client.JavaScriptObject;
/**
* Additional string related helper methods.<p>
*
* @since 8.0.0
*
* @see org.opencms.util.CmsStringUtil
*/
public final class CmsClientStringUtil {
/**
* Prevent instantiation.<p>
*/
private CmsClientStringUtil() {
// empty
}
/**
* Returns the exception message.<p>
*
* @param t the exception to get the message for
*
* @return the exception message
*/
public static String getMessage(Throwable t) {
String message = t.getLocalizedMessage();
if (message == null) {
message = t.getMessage();
}
if (message == null) {
message = t.getClass().getName();
}
return message;
}
/**
* Returns the stack trace of the Throwable as a string.<p>
*
* @param t the Throwable for which the stack trace should be returned
* @param separator the separator between the lines of the stack trace
*
* @return a string representing a stack trace
*/
public static String getStackTrace(Throwable t, String separator) {
return getStackTraceAsString(t.getStackTrace(), separator);
}
/**
* Returns the stack trace as a string.<p>
*
* @param trace the stack trace
* @param separator the separator between the lines of the stack trace
*
* @return a string representing a stack trace
*/
public static String getStackTraceAsString(StackTraceElement[] trace, String separator) {
String result = "";
for (StackTraceElement elem : trace) {
result += elem.toString();
result += separator;
}
return result;
}
/**
* The parseFloat() function parses a string and returns a float.<p>
*
* Only the first number in the string is returned. Leading and trailing spaces are allowed.
*
* @param str the string to be parsed
*
* @return the parsed number
*/
public static native double parseFloat(String str) /*-{
var ret = parseFloat(str, 10);
if (isNaN(ret)) {
return 0;
}
return ret;
}-*/;
/**
* The parseInt() function parses a string and returns an integer.<p>
*
* Only the first number in the string is returned. Leading and trailing spaces are allowed.
* If the first character cannot be converted to a number, parseInt() returns zero.<p>
*
* @param str the string to be parsed
*
* @return the parsed number
*/
public static native int parseInt(String str) /*-{
var ret = parseInt(str, 10);
if (isNaN(ret)) {
return 0;
}
return ret;
}-*/;
/**
* Pushes a String into a javascript array.<p>
*
* @param array the array to push the String into
* @param s the String to push into the array
*/
public static native void pushArray(JavaScriptObject array, String s) /*-{
array.push(s);
}-*/;
/**
* Shortens the string to the given maximum length.<p>
*
* Will include HTML entity ellipses replacing the cut off text.<p>
*
* @param text the string to shorten
* @param maxLength the maximum length
*
* @return the shortened string
*/
public static String shortenString(String text, int maxLength) {
if (text.length() <= maxLength) {
return text;
}
String newText = text.substring(0, maxLength - 1);
if (text.startsWith("/")) {
// file name?
newText = CmsStringUtil.formatResourceName(text, maxLength);
} else if (maxLength > 2) {
// enough space for ellipsis?
newText += CmsDomUtil.Entity.hellip.html();
}
if (CmsStringUtil.isEmptyOrWhitespaceOnly(newText)) {
// if empty, it could break the layout
newText = CmsDomUtil.Entity.nbsp.html();
}
return newText;
}
}