Package org.jline.builtins

Class Less

java.lang.Object

org.jline.builtins.Less

public class Less
extends Object

A terminal pager similar to the 'less' Unix command.

This class provides a file viewer with features including:

• Forward and backward navigation
• Search functionality
• Syntax highlighting
• Line numbering
• Status display
• Multiple file support

The implementation supports many of the key bindings and features of the traditional Unix 'less' command, adapted for JLine's terminal handling.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static enum	Less.Operation

Field Summary

Fields

Modifier and Type	Field	Description
protected final BindingReader	bindingReader
protected final StringBuilder	buffer
boolean	chopLongLines
protected final Path	currentDir
protected final org.jline.utils.Display	display
protected String	displayPattern
protected String	errorMessage
protected int	firstColumnToDisplay
protected int	firstLineInMemory
protected int	firstLineToDisplay
protected int	halfWindow
boolean	ignoreCaseAlways
boolean	ignoreCaseCond
protected KeyMap<Less.Operation>	keys
protected List<org.jline.utils.AttributedString>	lines
protected String	message
protected int	nbEof
boolean	noInit
boolean	noKeypad
protected int	offsetInLine
protected final Map<String,Less.Operation>	options
protected String	pattern
protected Nano.PatternHistory	patternHistory
boolean	printLineNumbers
boolean	quiet
boolean	quitAtFirstEof
boolean	quitAtSecondEof
boolean	quitIfOneScreen
protected BufferedReader	reader
protected final org.jline.terminal.Size	size
protected int	sourceIdx
protected List<Source>	sources
protected String	syntaxName
protected List<Integer>	tabs
protected final org.jline.terminal.Terminal	terminal
boolean	veryQuiet
protected int	window

Constructor Summary

Constructors

Constructor	Description
Less(org.jline.terminal.Terminal terminal, Path currentDir)
Less(org.jline.terminal.Terminal terminal, Path currentDir, Options opts)
Less(org.jline.terminal.Terminal terminal, Path currentDir, Options opts, ConfigurationPath configPath)

Method Summary

Modifier and Type	Method	Description
static void	checkInterrupted()	This is for long running commands to be interrupted by ctrl-c
void	handle(org.jline.terminal.Terminal.Signal signal)
protected void	openSource()
void	run(List<Source> sources)
void	run(Source... sources)
Less	tabs(List<Integer> tabs)
static String[]	usage()

Methods inherited from class java.lang.Object

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

Field Details

quitAtSecondEof

public boolean quitAtSecondEof

quitAtFirstEof

public boolean quitAtFirstEof

quitIfOneScreen

public boolean quitIfOneScreen

printLineNumbers

public boolean printLineNumbers

quiet

public boolean quiet

veryQuiet

public boolean veryQuiet

chopLongLines

public boolean chopLongLines

ignoreCaseCond

public boolean ignoreCaseCond

ignoreCaseAlways

public boolean ignoreCaseAlways

noKeypad

public boolean noKeypad

noInit

public boolean noInit

tabs

protected List<Integer> tabs

syntaxName

protected String syntaxName

terminal

protected final org.jline.terminal.Terminal terminal

display

protected final org.jline.utils.Display display

bindingReader

protected final BindingReader bindingReader

currentDir

protected final Path currentDir

sources

protected List<Source> sources

sourceIdx

protected int sourceIdx

reader

protected BufferedReader reader

keys

protected KeyMap<Less.Operation> keys

firstLineInMemory

protected int firstLineInMemory

lines

protected List<org.jline.utils.AttributedString> lines

firstLineToDisplay

protected int firstLineToDisplay

firstColumnToDisplay

protected int firstColumnToDisplay

offsetInLine

protected int offsetInLine

message

protected String message

errorMessage

protected String errorMessage

buffer

protected final StringBuilder buffer

options

protected final Map<String,Less.Operation> options

window

protected int window

halfWindow

protected int halfWindow

nbEof

protected int nbEof

patternHistory

protected Nano.PatternHistory patternHistory

pattern

protected String pattern

displayPattern

protected String displayPattern

size

protected final org.jline.terminal.Size size

Constructor Details

Less

public Less(org.jline.terminal.Terminal terminal,
 Path currentDir)

Less

public Less(org.jline.terminal.Terminal terminal,
 Path currentDir,
 Options opts)

Less

public Less(org.jline.terminal.Terminal terminal,
 Path currentDir,
 Options opts,
 ConfigurationPath configPath)

Method Details

usage

public static String[] usage()

tabs

public Less tabs(List<Integer> tabs)

handle

public void handle(org.jline.terminal.Terminal.Signal signal)

run

public void run(Source... sources)
         throws IOException,
InterruptedException

Throws:

IOException

InterruptedException

run

public void run(List<Source> sources)
         throws IOException,
InterruptedException

Throws:

IOException

InterruptedException

openSource

protected void openSource()
                   throws IOException

Throws:

IOException

checkInterrupted

public static void checkInterrupted()
                             throws InterruptedException

This is for long running commands to be interrupted by ctrl-c

Throws:

InterruptedException - if the thread has been interruped