java.lang.Object
- org.jline.reader.impl.BufferImpl

All Implemented Interfaces:

Buffer
```
public class BufferImpl
extends java.lang.Object
implements Buffer
```
A holder for a StringBuilder that also contains the current cursor position.

Since:

2.0

Field Summary

Fields
Modifier and Type Field Description

private int[] buffer

private int cursor

private int cursorCol

private int g0

private int g1

Constructor Summary

Constructors
Modifier Constructor Description

BufferImpl()

BufferImpl(int size)

private BufferImpl(BufferImpl buffer)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`private int`	`adjust(int i)`
`int`	`atChar(int i)`
`boolean`	`backspace()`	Issue a backspace.
`int`	`backspace(int num)`	Issue num backspaces.
`boolean`	`clear()`
`BufferImpl`	`copy()`
`void`	`copyFrom(Buffer buf)`
`int`	`currChar()`
`boolean`	`currChar(int ch)`
`int`	`cursor()`
`boolean`	`cursor(int position)`	Move the cursor position to the specified absolute index.
`boolean`	`delete()`
`int`	`delete(int num)`
`boolean`	`down()`
`private int`	`getCursorCol()`
`int`	`length()`
`int`	`move(int num)`	Move the cursor where characters.
`private void`	`moveGapToCursor()`
`boolean`	`moveXY(int dx, int dy)`
`int`	`nextChar()`
`int`	`prevChar()`
`java.lang.String`	`substring(int start)`
`java.lang.String`	`substring(int start, int end)`
`java.lang.String`	`toString()`
`boolean`	`up()`
`java.lang.String`	`upToCursor()`
`void`	`write(int c)`	Write the specific character into the buffer, setting the cursor position ahead one.
`private void`	`write(int[] ucps)`
`void`	`write(int c, boolean overTyping)`	Write the specific character into the buffer, setting the cursor position ahead one.
`void`	`write(java.lang.CharSequence str)`	Insert the specified chars into the buffer, setting the cursor to the end of the insertion point.
`void`	`write(java.lang.CharSequence str, boolean overTyping)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - cursor
```
private int cursor
```
  - cursorCol
```
private int cursorCol
```
  - buffer
```
private int[] buffer
```
  - g0
```
private int g0
```
  - g1
```
private int g1
```
- Constructor Detail
  - BufferImpl
```
public BufferImpl()
```
  - BufferImpl
```
public BufferImpl(int size)
```
  - BufferImpl
```
private BufferImpl(BufferImpl buffer)
```
- Method Detail
  - copy
```
public BufferImpl copy()
```
    Specified by:
    
    copy in interface Buffer
  - cursor
```
public int cursor()
```
    Specified by:
    
    cursor in interface Buffer
  - length
```
public int length()
```
    Specified by:
    
    length in interface Buffer
  - currChar
```
public boolean currChar(int ch)
```
    Specified by:
    
    currChar in interface Buffer
  - currChar
```
public int currChar()
```
    Specified by:
    
    currChar in interface Buffer
  - prevChar
```
public int prevChar()
```
    Specified by:
    
    prevChar in interface Buffer
  - nextChar
```
public int nextChar()
```
    Specified by:
    
    nextChar in interface Buffer
  - atChar
```
public int atChar(int i)
```
    Specified by:
    
    atChar in interface Buffer
  - adjust
```
private int adjust(int i)
```
  - write
```
public void write(int c)
```
    Write the specific character into the buffer, setting the cursor position ahead one.
    
    Specified by:
    
    write in interface Buffer
    
    Parameters:
    
    c - the character to insert
  - write
```
public void write(int c,
                  boolean overTyping)
```
    Write the specific character into the buffer, setting the cursor position ahead one. The text may overwrite or insert based on the current setting of overTyping.
    
    Specified by:
    
    write in interface Buffer
    
    Parameters:
    
    c - the character to insert
  - write
```
public void write(java.lang.CharSequence str)
```
    Insert the specified chars into the buffer, setting the cursor to the end of the insertion point.
    
    Specified by:
    
    write in interface Buffer
  - write
```
public void write(java.lang.CharSequence str,
                  boolean overTyping)
```
    Specified by:
    
    write in interface Buffer
  - write
```
private void write(int[] ucps)
```
  - clear
```
public boolean clear()
```
    Specified by:
    
    clear in interface Buffer
  - substring
```
public java.lang.String substring(int start)
```
    Specified by:
    
    substring in interface Buffer
  - substring
```
public java.lang.String substring(int start,
                                  int end)
```
    Specified by:
    
    substring in interface Buffer
  - upToCursor
```
public java.lang.String upToCursor()
```
    Specified by:
    
    upToCursor in interface Buffer
  - cursor
```
public boolean cursor(int position)
```
    Move the cursor position to the specified absolute index.
    
    Specified by:
    
    cursor in interface Buffer
  - move
```
public int move(int num)
```
    Move the cursor where characters.
    
    Specified by:
    
    move in interface Buffer
    
    Parameters:
    
    num - If less than 0, move abs(where) to the left, otherwise move where to the right.
    
    Returns:
    
    The number of spaces we moved
  - up
```
public boolean up()
```
    Specified by:
    
    up in interface Buffer
  - down
```
public boolean down()
```
    Specified by:
    
    down in interface Buffer
  - moveXY
```
public boolean moveXY(int dx,
                      int dy)
```
    Specified by:
    
    moveXY in interface Buffer
  - getCursorCol
```
private int getCursorCol()
```
  - backspace
```
public int backspace(int num)
```
    Issue num backspaces.
    
    Specified by:
    
    backspace in interface Buffer
    
    Returns:
    
    the number of characters backed up
  - backspace
```
public boolean backspace()
```
    Issue a backspace.
    
    Specified by:
    
    backspace in interface Buffer
    
    Returns:
    
    true if successful
  - delete
```
public int delete(int num)
```
    Specified by:
    
    delete in interface Buffer
  - delete
```
public boolean delete()
```
    Specified by:
    
    delete in interface Buffer
  - toString
```
public java.lang.String toString()
```
    Specified by:
    
    toString in interface Buffer
    
    Overrides:
    
    toString in class java.lang.Object
  - copyFrom
```
public void copyFrom(Buffer buf)
```
    Specified by:
    
    copyFrom in interface Buffer
  - moveGapToCursor
```
private void moveGapToCursor()
```

Modifier and Type	Field	Description
`private int[]`	`buffer`
`private int`	`cursor`
`private int`	`cursorCol`
`private int`	`g0`
`private int`	`g1`

Modifier	Constructor	Description
	`BufferImpl()`
	`BufferImpl(int size)`
`private`	`BufferImpl(BufferImpl buffer)`

Class BufferImpl

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

cursor

cursorCol

buffer

g0

g1

Constructor Detail

BufferImpl

BufferImpl

BufferImpl

Method Detail

copy

cursor

length

currChar

currChar

prevChar

nextChar

atChar

adjust

write

write

write

write

write

clear

substring

substring

upToCursor

cursor

move

up

down

moveXY

getCursorCol

backspace

backspace

delete

delete

toString

copyFrom

moveGapToCursor