Package protocols.apps.chat.ui

Class Console

java.lang.Object

protocols.apps.chat.ui.Console

public class Console
extends Object

A tiny mIRC-style terminal, built on JLine. The point of using JLine (rather than plain System.in/out) is the fixed input line: you can keep typing at the bottom while incoming messages scroll in above, without your half-typed line getting scrambled.

Two threads touch this:

• the reader thread (started by start(java.util.function.Consumer<java.lang.String>, java.lang.Runnable)) blocks on LineReader.readLine() and hands each entered line to a callback;
• any thread (typically Babel's protocol event loop) can call printAbove(java.lang.String) to display a message — JLine redraws the prompt for us.

Constructor Summary

Constructors

Constructor	Description
Console(String prompt)

Method Summary

Modifier and Type	Method	Description
void	printAbove(String line)	Print a line above the input prompt (safe to call from any thread).
void	start(Consumer<String> onLine, Runnable onQuit)	Start the input loop on a daemon thread.
void	stop()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Console

public Console(String prompt)
        throws IOException

Throws:

IOException

Method Details

printAbove

public void printAbove(String line)

Print a line above the input prompt (safe to call from any thread).

start

public void start(Consumer<String> onLine,
 Runnable onQuit)

Start the input loop on a daemon thread. onLine is called for every entered line; onQuit runs when the user hits Ctrl-C / Ctrl-D or the input stream ends.

stop

public void stop()