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/**************************************************************************
/* Readline.java -- Java wrapper of GNU readline
/*
/* Java Wrapper Copyright (c) 1998-2001 by Bernhard Bablok (mail@bablokb.de)
/*
/* This program is free software; you can redistribute it and/or modify
/* it under the terms of the GNU Library General Public License as published
/* by the Free Software Foundation; either version 2 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 Library General Public License for more details.
/*
/* You should have received a copy of the GNU Library General Public License
/* along with this program; see the file COPYING.LIB. If not, write to
/* the Free Software Foundation Inc., 59 Temple Place - Suite 330,
/* Boston, MA 02111-1307 USA
/**************************************************************************/
package org.gnu.readline;
import java.io.*;
import java.util.*;
/**
This class implements basic functionality of the GNU-readline interface. It
uses native method calls if available, otherwise it defaults to normal
I/O using a BufferedReader.
<p>A typical implementation could look like:
<pre>
try {
Readline.load(ReadlineLibrary.GnuReadline);
}
catch (UnsatisfiedLinkError ignore_me) {
System.err.println("couldn't load readline lib. Using simple stdin.");
}
Readline.initReadline("myapp");
Runtime.getRuntime() // if your version supports
.addShutdownHook(new Thread() { // addShutdownHook (since 1.3)
public void run() {
Readline.cleanup();
}
});
while (true) {
try {
line = Readline.readline("myprompt> ");
if (line == null)
System.out.println("no input");
else
processLine();
}
catch (EOFException e) {
break;
}
catch (Exception e) {
doSomething();
}
}
Readline.cleanup(); // see note above about addShutdownHook
</pre>
@version $Revision: 1.29 $
@author $Author: bablokb $
*/
public class Readline {
/**
Constant to access rl_library_version using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_LIBRARY_VERSION =
new ReadlineConstString(0, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_readline_name using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_READLINE_NAME =
new ReadlineConstString(1, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_prompt using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_PROMPT =
new ReadlineConstString(2, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_line_buffer using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_LINE_BUFFER =
new ReadlineConstString(3, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_terminal_name using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_TERMINAL_NAME =
new ReadlineConstString(4, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_executing_macro using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_EXECUTING_MACRO =
new ReadlineConstString(5, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_basic_word_break_characters using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_BASIC_WORD_BREAK_CHARACTERS =
new ReadlineConstString(6, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_completer_word_break_characters using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_COMPLETER_WORD_BREAK_CHARACTERS =
new ReadlineConstString(7, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_completer_quote_characters using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_COMPLETER_QUOTE_CHARACTERS =
new ReadlineConstString(8, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_basic_quote_characters using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_BASIC_QUOTE_CHARACTERS =
new ReadlineConstString(9, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_filename_quote_characters using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_FILENAME_QUOTE_CHARACTERS =
new ReadlineConstString(10, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_special_prefixes using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstString RL_SPECIAL_PREFIXES =
new ReadlineConstString(11, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access history_word_delimiters using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstString HISTORY_WORD_DELIMITERS =
new ReadlineConstString(12, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access history_no_expand_chars using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstString HISTORY_NO_EXPAND_CHARS =
new ReadlineConstString(13, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access history_search_delimiter_chars using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstString HISTORY_SEARCH_DELIMITERS =
new ReadlineConstString(14, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_readline_version using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_READLINE_VERSION =
new ReadlineConstInt(0, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_gnu_readline_p using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_GNU_READLINE_P =
new ReadlineConstInt(1, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_readline_state using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_READLINE_STATE =
new ReadlineConstInt(2, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_editing_mode using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_EDITING_MODE =
new ReadlineConstInt(3, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_insert_mode using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_INSERT_MODE =
new ReadlineConstInt(4, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_point using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_POINT =
new ReadlineConstInt(5, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_end using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_END =
new ReadlineConstInt(6, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_mark using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_MARK =
new ReadlineConstInt(7, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_done using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_DONE =
new ReadlineConstInt(8, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_pending_input using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_PENDING_INPUT =
new ReadlineConstInt(9, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_dispatching using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_DISPATCHING =
new ReadlineConstInt(10, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_explicit_arg using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_EXPLICIT_ARG =
new ReadlineConstInt(11, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_numeric_arg using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_NUMERIC_ARG =
new ReadlineConstInt(12, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_erase_empty_line using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_ERASE_EMPTY_LINE =
new ReadlineConstInt(13, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_already_prompted using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_ALREADY_PROMPTED =
new ReadlineConstInt(14, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_num_chars_to_read using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_NUM_CHARS_TO_READ =
new ReadlineConstInt(15, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_catch_signals using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_CATCH_SIGNALS =
new ReadlineConstInt(16, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_catch_sigwinch using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_CATCH_SIGWINCH =
new ReadlineConstInt(17, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_filename_completion_desired using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_FILENAME_COMPLETION_DESIRED =
new ReadlineConstInt(18, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_filename_quoting_desired using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_FILENAME_QUOTING_DESIRED =
new ReadlineConstInt(19, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_attempted_completion_over using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_ATTEMPTED_COMPLETION_OVER =
new ReadlineConstInt(20, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_completion_type using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_COMPLETION_TYPE =
new ReadlineConstInt(21, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_completion_append_character using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_COMPLETION_APPEND_CHARACTER =
new ReadlineConstInt(22, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_completion_suppress_append using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_COMPLETION_SUPPRESS_APPEND =
new ReadlineConstInt(23, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_completion_query_items using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_COMPLETION_QUERY_ITEMS =
new ReadlineConstInt(24, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access rl_completion_mark_symlink_dirs using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_COMPLETION_MARK_SYMLINK_DIRS =
new ReadlineConstInt(25, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_ignore_completion_duplicates using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_IGNORE_COMPLETION_DUPLICATES =
new ReadlineConstInt(26, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access rl_inhibit_completion using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstInt RL_INHIBIT_COMPLETION =
new ReadlineConstInt(27, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access history_base using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstInt HISTORY_BASE =
new ReadlineConstInt(28, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access history_length using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public final static ReadlineConstInt HISTORY_LENGTH =
new ReadlineConstInt(29, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline, ReadlineLibrary.Editline});
/**
Constant to access history_max_entries using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt HISTORY_MAX_ENTRIES =
new ReadlineConstInt(30, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/**
Constant to access history_quotes_inhibit_expansion using
<code>getVar()</code> or <code>setVar()</code>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
*/
public final static ReadlineConstInt HISTORY_QUOTES_EXPANSION =
new ReadlineConstInt(31, new ReadlineLibrary[]
{ReadlineLibrary.GnuReadline});
/* ----------------------------------------------------------------------- */
/**
The currently defined ReadlineCompleter.
*/
private static ReadlineCompleter iCompleter = null;
/**
The currently implementing backing library.
*/
private static ReadlineLibrary iLib = ReadlineLibrary.PureJava;
/**
The BufferedReader for the fallback solution.
*/
private static BufferedReader iReader = null;
/**
The current encoding of the BufferedReader. The default is the
value of the property <em>readline.encoding</em>. If this
property is unset, the default is null, so the BufferedReader
will use the default encoding.
*/
private static String iEncoding =
System.getProperty("readline.encoding", null);
/**
Configuration flag: throw an UnsupportedOperationException, if true.
This value defaults to false.
*/
private static boolean iThrowException = false;
/////////////////////////////////////////////////////////////////////////////
/**
Load an implementing backing library. This method might throw an
UnsatisfiedLinkError in case the native libary is not found in the
library path. If you want to have a portable program, just catch and
ignore that error. JavaReadline will then just use the pure Java fallback
solution.
@param lib An object (constant) of type ReadlineLibrary
@throws UnsatisfiedLinkError if the shared library could not be
found. Add it to your LD_LIBRARY_PATH.
@see org.gnu.readline.ReadlineLibrary
*/
public static final void load(ReadlineLibrary lib) throws UnsatisfiedLinkError {
if (lib == iLib) // ok, since objects are immutable
return;
if (lib == ReadlineLibrary.PureJava) {
iLib = lib;
return;
}
System.loadLibrary(lib.getName()); // might throw UnsatisfiedLinkError
iLib = lib;
}
/////////////////////////////////////////////////////////////////////////////
/**
Initialize the GNU-Readline library. This will also set the
application name, which can be used in the initialization files of
Readline (usually /etc/inputrc and ~/.inputrc) to define application
specific keys. See the file ReadlineTest.java int the test subdir of
the distribution for an example.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
<li>Getline</li>
</ul>
</p>
@param applicationName Name of application in initialization file
*/
public static void initReadline(String applicationName) {
if (iLib == ReadlineLibrary.GnuReadline ||
iLib == ReadlineLibrary.Editline ||
iLib == ReadlineLibrary.Getline)
initReadlineImpl(applicationName);
}
/////////////////////////////////////////////////////////////////////////////
/**
Display a prompt on standard output and read a string from standard
input. This method returns 'null', if there has been an empty input
(user pressed just [RETURN]) and throws an EOFException on end-of-file
(C-d). This versino of <tt>readline()</tt> automatically adds the line
to the in-memory history; use the other version of <tt>readline()</tt>
if you want explicit control over that feature.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
<li>Getline</li>
<li>PureJava</li>
</ul>
</p>
@param prompt Prompt to display
@return The string the user entered or 'null' if there was no input.
@throws EOFException on end-of-file, i.e. CTRL-d input.
@see #readline(String,boolean)
@see #addHistory()
*/
public static String readline(String prompt) throws EOFException,
IOException, UnsupportedEncodingException {
return readline(prompt,true);
}
/**
Display a prompt on standard output and read a string from
standard input. This method returns 'null', if there has
been an empty input (user pressed just [RETURN]) and throws
an EOFException on end-of-file (C-d).
@param prompt Prompt to display
@param addToHist <tt>true</tt> to add the line to the history
automatically; <tt>false</tt> to refrain from
adding the line to the history. (You can manually
add the line to the history by calling
<tt>addHistory()</tt>.)
@return The string the user entered or 'null' if there was no input.
@throws EOFException on end-of-file, i.e. CTRL-d input.
@see #readline(String)
@see #addHistory()
*/
public static String readline(String prompt, boolean addToHist)
throws EOFException, IOException, UnsupportedEncodingException {
if (iLib != ReadlineLibrary.PureJava) {
String line = readlineImpl(prompt);
if ((line != null) && (addToHist))
addToHistory(line);
return line;
} else {
System.out.print(prompt);
if (iReader == null) {
if (iEncoding == null)
iReader = new BufferedReader(new InputStreamReader(System.in));
else
iReader = new BufferedReader(
new InputStreamReader(System.in, iEncoding));
}
String line = iReader.readLine();
if (line == null)
throw new EOFException("EOF");
if (line.length() == 0)
line = null;
return line;
}
}
/////////////////////////////////////////////////////////////////////////////
/**
Add a line to the in-memory history.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
<li>Getline</li>
</ul>
</p>
@param line The line to add to the history
@throws UnsupportOperationException if underlying library doesn't support
a history
*/
public static void addToHistory(String line) {
if (iLib == ReadlineLibrary.GnuReadline ||
iLib == ReadlineLibrary.Editline ||
iLib == ReadlineLibrary.Getline)
addToHistoryImpl(line);
else if (iThrowException)
throw new UnsupportedOperationException();
}
/////////////////////////////////////////////////////////////////////////////
/**
Get the history buffer in a supplied <tt>Collection</tt>.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
@param collection where to store the history
@throws UnsupportOperationException if underlying library doesn't support
a history
*/
public static void getHistory(Collection collection) {
if (iLib == ReadlineLibrary.GnuReadline ||
iLib == ReadlineLibrary.Editline)
getHistoryImpl(collection);
else if (iThrowException)
throw new UnsupportedOperationException();
}
/////////////////////////////////////////////////////////////////////////////
/**
Get the size, in elements (lines), of the history buffer.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
@return the number of lines in the history buffer
*/
public static int getHistorySize() {
int result = 0;
if (iLib == ReadlineLibrary.GnuReadline ||
iLib == ReadlineLibrary.Editline)
result = getHistorySizeImpl();
else if (iThrowException)
throw new UnsupportedOperationException();
return result;
}
/////////////////////////////////////////////////////////////////////////////
/**
Clear the history buffer.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public static void clearHistory() {
if (iLib == ReadlineLibrary.GnuReadline ||
iLib == ReadlineLibrary.Editline)
clearHistoryImpl();
else if (iThrowException)
throw new UnsupportedOperationException();
}
/////////////////////////////////////////////////////////////////////////////
/**
Get the specified entry from the history buffer. History buffer entries
are numbered from 0 through (<tt>getHistorySize() - 1</tt>), with the
oldest entry at index 0.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
@param i the index of the entry to return
@return the line at the specified index in the history buffer
@throws ArrayIndexOutOfBoundsException index out of range
*/
public static String getHistoryLine(int i) {
String s = null;
if (iLib == ReadlineLibrary.GnuReadline ||
iLib == ReadlineLibrary.Editline) {
if ((i < 0) || i >= getHistorySize())
throw new ArrayIndexOutOfBoundsException(i);
s = getHistoryLineImpl(i);
}
else if (iThrowException)
throw new UnsupportedOperationException();
return s;
}
/////////////////////////////////////////////////////////////////////////////
/**
Read keybindings and variable assignments from a file. This method is a
wrapper to rl_read_init_file(char *filename). Throws IOException if
something goes wrong.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
@param filename Name of file to read bindings from
@return void
*/
public static void readInitFile(String filename) throws IOException {
if (iLib == ReadlineLibrary.GnuReadline)
readInitFileImpl(filename);
else if (iThrowException)
throw new UnsupportedOperationException();
}
/////////////////////////////////////////////////////////////////////////////
/**
Parse argument string as if it had been read from `inputrc' file
and perform key bindings and variable assignments found.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
</ul>
</p>
@param line Simulated line from inputrc file
@return boolean False in case of error
*/
public static boolean parseAndBind(String line) {
if (iLib == ReadlineLibrary.GnuReadline)
return parseAndBindImpl(line);
else if (iThrowException)
throw new UnsupportedOperationException();
else
return true;
}
/////////////////////////////////////////////////////////////////////////////
/**
Reads a history file into memory
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
@param filename Name of history file to read
*/
public static void readHistoryFile(String filename)
throws EOFException, UnsupportedEncodingException {
if (iLib == ReadlineLibrary.GnuReadline || iLib == ReadlineLibrary.Editline)
readHistoryFileImpl(filename);
else if (iThrowException)
throw new UnsupportedOperationException();
}
/////////////////////////////////////////////////////////////////////////////
/**
Writes a history file to disc
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
@param filename Name of history file to write
*/
public static void writeHistoryFile(String filename)
throws EOFException, UnsupportedEncodingException {
if (iLib == ReadlineLibrary.GnuReadline || iLib == ReadlineLibrary.Editline)
writeHistoryFileImpl(filename);
else if (iThrowException)
throw new UnsupportedOperationException();
}
/////////////////////////////////////////////////////////////////////////////
/**
Set your completer implementation. Setting this to <code>null</code>
will result in the default behaviour of readline which is filename
completion.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
@param rlc An object implementing the ReadlineCompleter interface
*/
public static void setCompleter(ReadlineCompleter rlc) {
iCompleter = rlc;
if (iLib == ReadlineLibrary.GnuReadline ||
iLib == ReadlineLibrary.Editline) {
setCompleterImpl(iCompleter);
} else if (iThrowException)
throw new UnsupportedOperationException();
}
/////////////////////////////////////////////////////////////////////////////
/**
Query current completer function.
@return Current ReadlineCompleter object
*/
public static ReadlineCompleter getCompleter() {
return iCompleter;
}
/////////////////////////////////////////////////////////////////////////////
/**
Reset the readline library and with it, the terminal.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public static void cleanup() {
if (iLib == ReadlineLibrary.GnuReadline ||
iLib == ReadlineLibrary.Editline) {
cleanupReadlineImpl();
}
}
/////////////////////////////////////////////////////////////////////////////
/**
Return if we have a terminal. This requires, that any of the native
libraries have been loaded yet
(so call Readline.{@link #load(ReadlineLibrary)}())
first, otherwise this will always return true.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public static boolean hasTerminal() {
if (iLib == ReadlineLibrary.GnuReadline ||
iLib == ReadlineLibrary.Editline) {
return hasTerminalImpl();
}
return true;
}
/////////////////////////////////////////////////////////////////////////////
/**
Set word break characters.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
@param wordBreakCharacters A string of word break characters
*/
public static void
setWordBreakCharacters(String wordBreakCharacters)
throws UnsupportedEncodingException {
if (iLib == ReadlineLibrary.GnuReadline || iLib == ReadlineLibrary.Editline)
setWordBreakCharactersImpl(wordBreakCharacters);
else if (iThrowException)
throw new UnsupportedOperationException();
}
/////////////////////////////////////////////////////////////////////////////
/**
Query word break characters.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public static String getWordBreakCharacters() {
if (iLib == ReadlineLibrary.GnuReadline || iLib == ReadlineLibrary.Editline)
return getWordBreakCharactersImpl();
else if (iThrowException)
throw new UnsupportedOperationException();
else
return null;
}
/////////////////////////////////////////////////////////////////////////////
/**
Query the current line buffer. This returns the current content of
the internal line buffer. You might need this in a
{@link ReadlineCompleter} implementation to access the full text
given so far.
<p>Supporting implementations:
<ul>
<li>GNU-Readline</li>
<li>Editline</li>
</ul>
</p>
*/
public static String getLineBuffer() {
if (iLib == ReadlineLibrary.GnuReadline || iLib == ReadlineLibrary.Editline)
return getLineBufferImpl();
else if (iThrowException)
throw new UnsupportedOperationException();
else
return null;
}
/////////////////////////////////////////////////////////////////////////////
/**
Configure behavior in case an unsupported method is called. If argument
is true, unsupported methods throw an UnsupportedOperationException.
@param flag configuration flag
*/
public static void setThrowExceptionOnUnsupportedMethod(boolean flag) {
iThrowException = flag;
}
/////////////////////////////////////////////////////////////////////////////
/**
Query behavior in case an unsupported method is called.
@return configuration flag
*/
public static boolean getThrowExceptionOnUnsupportedMethod() {
return iThrowException;
}
/////////////////////////////////////////////////////////////////////////////
/**
Set current encoding of fallback BufferedReader.
@param encoding encoding to use
*/
public static void setEncoding(String encoding) {
iEncoding = encoding;
}
/////////////////////////////////////////////////////////////////////////////
/**
Query current encoding of fallback BufferedReader.
@return current encoding
*/
public static String getEncoding() {
return iEncoding;
}
/////////////////////////////////////////////////////////////////////////////
/**
Set integer readline-variable.
@param c symbolic constant of readline-variable
@param value new value of readline-variable
@return old value of readline-variable
*/
public static int setVar(ReadlineConstInt c, int value) {
if (c.isSupported(iLib))
return setVarIntImpl(c.getNumber(),value);
else if (iThrowException)
throw new UnsupportedOperationException();
else
return Integer.MIN_VALUE;
}
/////////////////////////////////////////////////////////////////////////////
/**
Query integer readline-variable.
@param c symbolic constant of readline-variable
@return value of variable
*/
public static int getVar(ReadlineConstInt c) {
if (c.isSupported(iLib))
return getVarIntImpl(c.getNumber());
else if (iThrowException)
throw new UnsupportedOperationException();
else
return Integer.MIN_VALUE;
}
/////////////////////////////////////////////////////////////////////////////
/**
Set string readline-variable.
@param c symbolic constant of readline-variable
@param value new value of readline-variable
@return old value of readline-variable
*/
public static String setVar(ReadlineConstString c, String value) throws
UnsupportedEncodingException {
if (c.isSupported(iLib))
return setVarStringImpl(c.getNumber(),value);
else if (iThrowException)
throw new UnsupportedOperationException();
else
return null;
}
/////////////////////////////////////////////////////////////////////////////
/**
Query string readline-variable.
@param c symbolic constant of readline-variable
@return value of variable
*/
public static String getVar(ReadlineConstString c) throws
UnsupportedEncodingException {
if (c.isSupported(iLib))
return getVarStringImpl(c.getNumber());
else if (iThrowException)
throw new UnsupportedOperationException();
else
return null;
}
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of initReadline()
@see org.gnu.readline.Readline#initReadline(String applicationName)
*/
private native static void initReadlineImpl(String applicationName);
/////////////////////////////////////////////////////////////////////////////
/**
cleanup readline; reset terminal.
*/
private native static void cleanupReadlineImpl();
/////////////////////////////////////////////////////////////////////////////
/**
native implementation of isatty();
*/
private native static boolean hasTerminalImpl();
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of readline()
@see org.gnu.readline.Readline#readline(String prompt)
*/
private native static String readlineImpl(String prompt)
throws EOFException, UnsupportedEncodingException;
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of addToHistory
@see org.gnu.readline.Readline#addToHistory(String line)
*/
private native static void addToHistoryImpl(String line);
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of getHistory
@see org.gnu.readline.Readline#getHistory()
*/
private native static void getHistoryImpl(Collection collection);
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of getHistorySize
@see org.gnu.readline.Readline#getHistorySize()
*/
private native static int getHistorySizeImpl();
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of getHistoryLine
@see org.gnu.readline.Readline#getHistoryLine()
*/
private native static String getHistoryLineImpl(int i);
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of clearHistory
@see org.gnu.readline.Readline#clearHistory()
*/
private native static void clearHistoryImpl();
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of readInitFile(String filename)
@see org.gnu.readline.Readline#readInitFile(String filename)
*/
private native static void readInitFileImpl(String filename)
throws IOException;
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of getLineBuffer()
@see org.gnu.readline.Readline#getLineBuffer()
*/
private native static String getLineBufferImpl();
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of parseAndBind(String line)
@see org.gnu.readline.Readline#parseAndBind(String line)
*/
private native static boolean parseAndBindImpl(String line);
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of readHistoryFile(String filename)
@see org.gnu.readline.Readline#readHistoryFile(String filename)
*/
private native static void readHistoryFileImpl(String filename)
throws EOFException, UnsupportedEncodingException;
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of writeHistoryFile(String filename)
@see org.gnu.readline.Readline#writeHistoryFile(String filename)
*/
private native static void writeHistoryFileImpl(String filename)
throws EOFException, UnsupportedEncodingException;
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of setCompleter(ReadlineCompleter rlc)
@see org.gnu.readline.Readline#setCompleter(ReadlineCompleter rlc)
*/
private native static void setCompleterImpl(ReadlineCompleter rlc);
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of getWordBreakCharacters()
@see org.gnu.readline.Readline#getWordBreakCharacters()
*/
private native static String getWordBreakCharactersImpl();
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of setWordBreakCharacters()
@see
org.gnu.readline.Readline#setWordBreakCharacters(String wordBreakCharacters)
*/
private native static void
setWordBreakCharactersImpl(String wordBreakCharacters)
throws UnsupportedEncodingException;
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of setVar(ReadlineConstInt,int)
@see
org.gnu.readline.Readline#setVar(ReadlineConstInt,int)
*/
private native static int setVarIntImpl(int number,int value);
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of getVar(ReadlineConstInt)
@see
org.gnu.readline.Readline#getVar(ReadlineConstInt)
*/
private native static int getVarIntImpl(int number);
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of setVar(ReadlineConstString,String)
@see
org.gnu.readline.Readline#setVar(ReadlineConstString,String)
*/
private native static String setVarStringImpl(int number,String value)
throws UnsupportedEncodingException;
/////////////////////////////////////////////////////////////////////////////
/**
Native implementation of getVar(ReadlineConstString)
@see
org.gnu.readline.Readline#getVar(ReadlineConstString)
*/
private native static String getVarStringImpl(int number)
throws UnsupportedEncodingException;
}
|