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/*
* java-gnome, a UI library for writing GTK and GNOME programs from Java!
*
* Copyright © 2006-2010 Operational Dynamics Consulting, Pty Ltd
*
* The code in this file, and the program it is a part of, is made available
* to you by its authors as open source software: you can redistribute it
* and/or modify it under the terms of the GNU General Public License version
* 2 ("GPL") as published by the Free Software Foundation.
*
* 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 GPL for more details.
*
* You should have received a copy of the GPL along with this program. If not,
* see http://www.gnu.org/licenses/. The authors of this program may be
* contacted through http://java-gnome.sourceforge.net/.
*/
package com.operationaldynamics.ui;
/*
* This class imported from ObjectiveAccounts accounting package where it was
* originally deployed as GPL code in generic.ui.Text with the following
* headers:
*
* Word wrap algorithm GPL code imported from xseq.ui.OverviewWindow
* Copyright (c) 2004-2005 Operational Dynamics Consulting Pty Ltd
*
* Comma padding algorithm imported from pulseSession.session.cmdHandler of
* SINS (SINS Is Not ShadNet) codebase, redistributable under the GNU GPL v2.
* Copyright (c) 1997-1998 Andrew Cowie
*/
import java.text.DecimalFormat;
/**
* This class also has numerous static methods with useful routines for doing
* basic formatting on Strings.
*
* @author Andrew Cowie
*/
public abstract class Text
{
/**
* @param str
* the String to pad.
* @param width
* maximum length of the padded result.
* @param justify
* if RIGHT, right justify. If LEFT, normal left justification.
* @return the padded String.
*/
public static String pad(String str, int width, Align justify) {
String trimmed = null;
/*
* crop
*/
int len;
if (str == null) {
len = 0;
trimmed = "";
} else {
len = str.length();
if (len > width) {
trimmed = str.substring(0, width);
len = width;
} else {
trimmed = str;
}
}
int spaces = width - len;
/*
* pad
*/
StringBuffer buf = new StringBuffer("");
if (justify == Align.LEFT) {
buf.append(trimmed);
}
for (int i = 0; i < spaces; i++) {
buf.append(" ");
}
if (justify == Align.RIGHT) {
buf.append(trimmed);
}
return buf.toString();
}
/**
* If argument is longer than width, then trim it back and add three dots.
*/
public static String chomp(String str, int width) {
if (width < 2) { // 4
throw new IllegalArgumentException(
"Can't chomp to less than a width of 2 because of adding elipses");
}
if (str == null) {
return "";
}
/*
* crop
*/
int len = str.length();
if (len > width) {
StringBuffer buf = new StringBuffer(str.substring(0, width - 1)); // 3
final int end = buf.length() - 1;
if (buf.charAt(end) == ' ') {
buf.deleteCharAt(end);
}
// We now use an ellipsis, … instead of "..."
buf.append("\u2026");
return buf.toString();
} else {
return str;
}
}
/**
* Carry out manual word wrap on a String. Normalizes all \n and \t
* characters to spaces, trims leading and training whitespace, and then
* inserts \n characters to "wrap" at the specified width boundary.
* <p>
* This code came about because unfortunately, Pango markup has no syntax
* for expressing auto word wrap, and worse, GtkCellRendererText has no
* ability to wrap text. So we (ick) do it by hand.
*
* @return a single String with newline characters inserted at appropriate
* points to cause the effect of wrapping at the specified width.
*/
public static String wrap(String str, int width) {
StringBuffer buf = new StringBuffer(str);
int index;
/*
* normalize any existing IFS characters to spaces
*/
while ((index = buf.indexOf("\n")) != -1) {
buf.setCharAt(index, ' ');
}
while ((index = buf.indexOf("\t")) != -1) {
buf.setCharAt(index, ' ');
}
/*
* trim. Yes, I know about String.trim(), but we've already done half
* the work it does; no need to be inefficient.
*/
while (buf.charAt(0) == ' ') {
buf.deleteCharAt(0);
}
while (buf.charAt(buf.length() - 1) == ' ') {
buf.deleteCharAt(buf.length() - 1);
}
while ((index = buf.indexOf(" ")) != -1) {
buf.deleteCharAt(index);
}
/*
* word wrap.
*/
int next_space = 0;
int line_start = 0;
while (next_space != -1) {
if ((next_space - line_start) > width) {
buf.setCharAt(next_space, '\n');
line_start = next_space;
}
next_space = buf.indexOf(" ", next_space + 1); // bounds?
}
return buf.toString();
}
/**
* Pad and justify a long. This is useful for displaying the memory usage
* numbers from Runtime.freeMemory() and Runtime.totalMemory()
*
* @param num
* a number to render as a comma padded string.
* @return a 25 character wide string with the number right justified wnd
* with comma characters at thousand marks.
*/
/*
* from pulseSession.session.cmdHandler
*/
public static String padComma(long num) {
DecimalFormat df = new DecimalFormat("#,###,###,###,###,###,###");
StringBuffer comma = new StringBuffer(df.format(num));
int pad = 25 - comma.length();
for (int i = 0; i < pad; i++) {
comma.insert(0, ' ');
}
return comma.toString();
}
}
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