mirror of
https://github.com/2003scape/deep-c-rsc.git
synced 2024-03-22 05:49:51 -04:00
269 lines
9.1 KiB
Java
269 lines
9.1 KiB
Java
/* OptionGroup.java - a group of related command-line options
|
|
Copyright (C) 2006 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath 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 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package gnu.classpath.tools.getopt;
|
|
|
|
import java.io.PrintStream;
|
|
import java.text.BreakIterator;
|
|
import java.util.ArrayList;
|
|
import java.util.Iterator;
|
|
import java.util.Locale;
|
|
|
|
/**
|
|
* An option group holds a collection of Options. It also has a name. Option
|
|
* groups are primarily useful for grouping help output.
|
|
*/
|
|
public class OptionGroup
|
|
{
|
|
/** An 80-character string of whitespaces to use as a source for padding. */
|
|
private static final String FILLER = " "
|
|
+ " ";
|
|
private String name;
|
|
|
|
ArrayList options = new ArrayList();
|
|
|
|
/**
|
|
* Create a new nameless option group. This can only be used by Parser.
|
|
*/
|
|
OptionGroup()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Create a new option group with the indicated name.
|
|
*
|
|
* @param name the name
|
|
*/
|
|
public OptionGroup(String name)
|
|
{
|
|
this.name = name;
|
|
}
|
|
|
|
/**
|
|
* Print a designated text to a {@link PrintStream}, eventually wrapping the
|
|
* lines of text so as to ensure that the width of each line does not overflow
|
|
* {@link Parser#MAX_LINE_LENGTH} columns. The line-wrapping is done with a
|
|
* {@link BreakIterator} using the default {@link Locale}.
|
|
* <p>
|
|
* The text to print may contain <code>\n</code> characters. This method will
|
|
* force a line-break for each such character.
|
|
*
|
|
* @param out the {@link PrintStream} destination of the formatted text.
|
|
* @param text the text to print.
|
|
* @param leftMargin a positive value indicating the column position of the
|
|
* start of the first line. Continuation lines, if they exist, are
|
|
* printed starting at <code>leftMargin + 2</code> as per GNU
|
|
* convention.
|
|
* @see Parser#MAX_LINE_LENGTH
|
|
*/
|
|
protected static void formatText(PrintStream out, String text, int leftMargin)
|
|
{
|
|
formatText(out, text, leftMargin, Locale.getDefault());
|
|
}
|
|
|
|
/**
|
|
* Similar to the method with the same name and three arguments, except that
|
|
* the caller MUST specify a non-null {@link Locale} instance.
|
|
* <p>
|
|
* Print a designated text to a {@link PrintStream}, eventually wrapping the
|
|
* lines of text so as to ensure that the width of each line does not overflow
|
|
* {@link Parser#MAX_LINE_LENGTH} columns. The line-wrapping is done with a
|
|
* {@link BreakIterator} using the designated {@link Locale}.
|
|
* <p>
|
|
* The text to print may contain <code>\n</code> characters. This method will
|
|
* force a line-break for each such character.
|
|
*
|
|
* @param out the {@link PrintStream} destination of the formatted text.
|
|
* @param text the text to print.
|
|
* @param leftMargin a positive value indicating the column position of the
|
|
* start of the first line. Continuation lines, if they exist, are
|
|
* printed starting at <code>leftMargin + 2</code> as per GNU
|
|
* convention.
|
|
* @param aLocale the {@link Locale} instance to use when constructing the
|
|
* {@link BreakIterator}.
|
|
* @see Parser#MAX_LINE_LENGTH
|
|
*/
|
|
protected static void formatText(PrintStream out, String text, int leftMargin,
|
|
Locale aLocale)
|
|
{
|
|
BreakIterator bit = BreakIterator.getLineInstance(aLocale);
|
|
String[] lines = text.split("\n");
|
|
int length = leftMargin;
|
|
String leftPadding = FILLER.substring(0, leftMargin + 2);
|
|
for (int i = 0; i < lines.length; i++)
|
|
{
|
|
text = lines[i];
|
|
bit.setText(text);
|
|
int start = bit.first();
|
|
int finish;
|
|
while ((finish = bit.next()) != BreakIterator.DONE)
|
|
{
|
|
String word = text.substring(start, finish);
|
|
length += word.length();
|
|
if (length >= Parser.MAX_LINE_LENGTH)
|
|
{
|
|
out.println();
|
|
out.print(leftPadding);
|
|
length = word.length() + leftMargin + 2;
|
|
}
|
|
out.print(word);
|
|
start = finish;
|
|
}
|
|
out.println();
|
|
if (i != lines.length - 1)
|
|
{
|
|
length = leftMargin + 2;
|
|
out.print(leftPadding);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add an option to this option group.
|
|
*
|
|
* @param opt the option to add
|
|
*/
|
|
public void add(Option opt)
|
|
{
|
|
options.add(opt);
|
|
}
|
|
|
|
/**
|
|
* Print the help output for this option group.
|
|
*
|
|
* @param out the stream to which to print
|
|
*/
|
|
public void printHelp(PrintStream out, boolean longOnly)
|
|
{
|
|
// Compute maximum lengths.
|
|
int maxArgLen = 0;
|
|
boolean shortOptionSeen = false;
|
|
Iterator it;
|
|
|
|
// The first pass only looks to see if we have a short option.
|
|
it = options.iterator();
|
|
while (it.hasNext())
|
|
{
|
|
Option option = (Option) it.next();
|
|
if (option.getShortName() != '\0')
|
|
{
|
|
shortOptionSeen = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
it = options.iterator();
|
|
while (it.hasNext())
|
|
{
|
|
Option option = (Option) it.next();
|
|
String argName = option.getArgumentName();
|
|
// First compute the width required for the short
|
|
// option. "2" is the initial indentation. In the
|
|
// GNU style we don't print an argument name for
|
|
// a short option if there is also a long name for
|
|
// the option.
|
|
int thisArgLen = 2;
|
|
if (shortOptionSeen)
|
|
thisArgLen += 4;
|
|
if (option.getLongName() != null)
|
|
{
|
|
// Handle either '-' or '--'.
|
|
thisArgLen += 1 + option.getLongName().length();
|
|
if (! longOnly)
|
|
++thisArgLen;
|
|
}
|
|
// Add in the width of the argument name.
|
|
if (argName != null)
|
|
thisArgLen += 1 + argName.length();
|
|
maxArgLen = Math.max(maxArgLen, thisArgLen);
|
|
}
|
|
|
|
// Print the help.
|
|
if (name != null)
|
|
out.println(name + ":");
|
|
it = options.iterator();
|
|
while (it.hasNext())
|
|
{
|
|
Option option = (Option) it.next();
|
|
String argName = option.getArgumentName();
|
|
int column = 0;
|
|
if (option.getShortName() != '\0')
|
|
{
|
|
out.print(" -");
|
|
out.print(option.getShortName());
|
|
column += 4;
|
|
if (option.getLongName() == null)
|
|
{
|
|
if (argName != null)
|
|
{
|
|
if (! option.isJoined())
|
|
{
|
|
out.print(' ');
|
|
++column;
|
|
}
|
|
out.print(argName);
|
|
column += argName.length();
|
|
}
|
|
out.print(" ");
|
|
}
|
|
else
|
|
out.print(", ");
|
|
column += 2;
|
|
}
|
|
// Indent the long option past the short options, if one
|
|
// was seen.
|
|
for (; column < (shortOptionSeen ? 6 : 2); ++column)
|
|
out.print(' ');
|
|
if (option.getLongName() != null)
|
|
{
|
|
out.print(longOnly ? "-" : "--");
|
|
out.print(option.getLongName());
|
|
column += (longOnly ? 1 : 2) + option.getLongName().length();
|
|
if (argName != null)
|
|
{
|
|
out.print(" " + argName);
|
|
column += 1 + argName.length();
|
|
}
|
|
}
|
|
// FIXME: should have a better heuristic for padding.
|
|
out.print(FILLER.substring(0, maxArgLen + 4 - column));
|
|
formatText(out, option.getDescription(), maxArgLen + 4);
|
|
}
|
|
}
|
|
}
|