/*
GanttProject is an opensource project management tool. License: GPL3
Copyright (C) 2011 GanttProject team
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 3
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package net.sourceforge.ganttproject.util;
import java.awt.FontMetrics;
/**
* This class groups static methods together to handle strings.
*
* @author Maarten Bezemer
*/
public class StringUtils {
/**
* @return string with the given amount of spaces padded to the left. For
* negative amounts the original string will be returned
*/
static public String padLeft(String string, int padding) {
if (padding > 0) {
padding += string.length();
return String.format("%1$" + padding + "s", string);
}
return string;
}
/**
* @return string with the given amount of spaces padded to the right. For
* negative amounts the original string will be returned
*/
static public String padRight(String string, int padding) {
if (padding > 0) {
padding += string.length();
return String.format("%1$-" + padding + "s", string);
}
return string;
}
/** @return a comma separated list showing the names of the given objects */
public static String getDisplayNames(Object[] objects) {
if (objects.length == 1) {
return objects[0].toString();
}
StringBuffer result = new StringBuffer();
for (int i = 0; i < objects.length; i++) {
result.append(objects[i].toString());
if (i < objects.length - 1) {
result.append(", ");
}
}
return result.toString();
}
/**
* Truncates the <code>str</code> String according to <code>width</code> and
* <code>fontMetrics</code>.
*
* @return the truncated String.
*/
public static String getTruncatedString(String str, int width, FontMetrics fontMetrics) {
int strWidth = fontMetrics.stringWidth(str);
if (strWidth <= width) {
// No truncation is required
return str;
}
// Start with width of "..." part
int maxWidth = fontMetrics.stringWidth("...");
// Find amount of chars to reach the given width
int i;
for (i = 0; i < str.length() && maxWidth < width; i++) {
maxWidth += fontMetrics.charWidth(str.charAt(i));
;
}
// last check went over allowed width, so use up to this length (see
// substring documentation)
return str.substring(0, i) + "...";
}
public static boolean isEmptyOrNull(String s) {
if (s == null) {
return true;
}
if (s.isEmpty()) {
return true;
}
return false;
}
}