Package org.jline.builtins

Class Less

java.lang.Object

org.jline.builtins.Less

public class Less
extends java.lang.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 class	Less.Operation

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor	Description
Less(Terminal terminal, java.nio.file.Path currentDir)
Less(Terminal terminal, java.nio.file.Path currentDir, Options opts)
Less(Terminal terminal, java.nio.file.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(Terminal.Signal signal)
protected void	openSource()
void	run(java.util.List<Source> sources)
void	run(Source... sources)
Less	tabs(java.util.List<java.lang.Integer> tabs)
static java.lang.String[]	usage()

Methods inherited from class java.lang.Object

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

Field Detail

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 java.util.List<java.lang.Integer> tabs

syntaxName

protected java.lang.String syntaxName

terminal

protected final Terminal terminal

display

protected final Display display

bindingReader

protected final BindingReader bindingReader

currentDir

protected final java.nio.file.Path currentDir

sources

protected java.util.List<Source> sources

sourceIdx

protected int sourceIdx

reader

protected java.io.BufferedReader reader

keys

protected KeyMap<Less.Operation> keys

firstLineInMemory

protected int firstLineInMemory

lines

protected java.util.List<AttributedString> lines

firstLineToDisplay

protected int firstLineToDisplay

firstColumnToDisplay

protected int firstColumnToDisplay

offsetInLine

protected int offsetInLine

message

protected java.lang.String message

errorMessage

protected java.lang.String errorMessage

buffer

protected final java.lang.StringBuilder buffer

options

protected final java.util.Map<java.lang.String,Less.Operation> options

window

protected int window

halfWindow

protected int halfWindow

nbEof

protected int nbEof

patternHistory

protected Nano.PatternHistory patternHistory

pattern

protected java.lang.String pattern

displayPattern

protected java.lang.String displayPattern

size

protected final Size size

Constructor Detail

Less

public Less(Terminal terminal,
            java.nio.file.Path currentDir)

Less

public Less(Terminal terminal,
            java.nio.file.Path currentDir,
            Options opts)

Less

public Less(Terminal terminal,
            java.nio.file.Path currentDir,
            Options opts,
            ConfigurationPath configPath)

Method Detail

usage

public static java.lang.String[] usage()

tabs

public Less tabs(java.util.List<java.lang.Integer> tabs)

handle

public void handle(Terminal.Signal signal)

run

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

Throws:

java.io.IOException

java.lang.InterruptedException

run

public void run(java.util.List<Source> sources)
         throws java.io.IOException,
                java.lang.InterruptedException

Throws:

java.io.IOException

java.lang.InterruptedException

openSource

protected void openSource()
                   throws java.io.IOException

Throws:

java.io.IOException

checkInterrupted

public static void checkInterrupted()
                             throws java.lang.InterruptedException

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

Throws:

java.lang.InterruptedException - if the thread has been interruped