org.crsh.console
Class EditorBuffer

java.lang.Object
  org.crsh.console.EditorBuffer

All Implemented Interfaces:

Appendable, Iterator<String>

final class EditorBuffer
extends Object
implements Appendable, Iterator<String>

Field Summary

private StringBuilder	current .
private int	cursor Cursor position.
private ConsoleDriver	driver The output.
private LinkedList<String>	lines Previous lines.
private boolean	needFlush True if flush is needed.

Constructor Summary

EditorBuffer(ConsoleDriver driver)

Method Summary

EditorBuffer	append(char c)
EditorBuffer	append(CharSequence s)
EditorBuffer	append(CharSequence csq, int start, int end)
private void	appendData(CharSequence s, int start, int end)
private int	appendDel() Delete the char before the cursor.
(package private) char	charAt(int index) Returns a character at a specified index in the buffer.
(package private) int	del() Delete the char under the cursor or return -1 if no char was deleted.
private void	echoCRLF()
private void	echoDel()
(package private) void	flush()
(package private) void	flush(boolean force)
(package private) int	getCursor() Returns the current cursor position.
String	getLine()
List<String>	getLines()
(package private) int	getSize() Returns the total number of chars in the buffer, independently of the cursor position.
boolean	hasNext()
(package private) boolean	moveLeft()
(package private) int	moveLeftBy(int count)
(package private) boolean	moveRight()
(package private) boolean	moveRight(char c) Move the cursor right by one char with the provided char.
(package private) int	moveRightBy(int count)
private void	newAppendNoLF(CharSequence s, int start, int end)
String	next()
private int	pop() Popup one char from buffer at the current cursor position.
void	remove()
(package private) String	replace(CharSequence s) Replace all the characters before the cursor by the provided char sequence.
(package private) void	reset() Reset the buffer state.

Methods inherited from class java.lang.Object

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

Field Detail

current

private StringBuilder current

.

cursor

private int cursor

Cursor position.

lines

private LinkedList<String> lines

Previous lines.

driver

private final ConsoleDriver driver

The output.

needFlush

private boolean needFlush

True if flush is needed.

Constructor Detail

EditorBuffer

EditorBuffer(ConsoleDriver driver)

Method Detail

flush

void flush()
     throws IOException

Throws:

IOException

flush

void flush(boolean force)
     throws IOException

Throws:

IOException

reset

void reset()

Reset the buffer state.

getSize

int getSize()

Returns the total number of chars in the buffer, independently of the cursor position.

Returns:

the number of chars

getCursor

int getCursor()

Returns the current cursor position.

Returns:

the cursor position

charAt

char charAt(int index)
      throws StringIndexOutOfBoundsException

Returns a character at a specified index in the buffer.

Parameters:

index - the index

Returns:

the char

Throws:

StringIndexOutOfBoundsException - if the index is negative or larget than the size

getLine

public String getLine()

Returns:

the current line

getLines

public List<String> getLines()

Returns:

the lines

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<String>

next

public String next()

Specified by:

next in interface Iterator<String>

remove

public void remove()

Specified by:

remove in interface Iterator<String>

append

public EditorBuffer append(char c)
                    throws IOException

Specified by:

append in interface Appendable

Throws:

IOException

append

public EditorBuffer append(CharSequence s)
                    throws IOException

Specified by:

append in interface Appendable

Throws:

IOException

append

public EditorBuffer append(CharSequence csq,
                           int start,
                           int end)
                    throws IOException

Specified by:

append in interface Appendable

Throws:

IOException

replace

String replace(CharSequence s)
         throws IOException

Replace all the characters before the cursor by the provided char sequence.

Parameters:

s - the new char sequence

Returns:

the l

Throws:

IOException - any IOException

moveRight

boolean moveRight(char c)
            throws IOException

Move the cursor right by one char with the provided char.

Parameters:

c - the char to overwrite

Returns:

true if it happended

Throws:

IOException

moveRight

boolean moveRight()
            throws IOException

Throws:

IOException

moveLeft

boolean moveLeft()
           throws IOException

Throws:

IOException

moveRightBy

int moveRightBy(int count)
          throws IOException,
                 IllegalArgumentException

Throws:

IOException

IllegalArgumentException

moveLeftBy

int moveLeftBy(int count)
         throws IOException,
                IllegalArgumentException

Throws:

IOException

IllegalArgumentException

del

int del()
  throws IOException

Delete the char under the cursor or return -1 if no char was deleted.

Returns:

the deleted char

Throws:

IOException - any IOException

appendData

private void appendData(CharSequence s,
                        int start,
                        int end)
                 throws IOException

Throws:

IOException

newAppendNoLF

private void newAppendNoLF(CharSequence s,
                           int start,
                           int end)
                    throws IOException

Throws:

IOException

appendDel

private int appendDel()
               throws IOException

Delete the char before the cursor.

Returns:

the removed char value or -1 if no char was removed

Throws:

IOException - any IOException

echoDel

private void echoDel()
              throws IOException

Throws:

IOException

echoCRLF

private void echoCRLF()
               throws IOException

Throws:

IOException

pop

private int pop()

Popup one char from buffer at the current cursor position.

Returns:

the popped char or -1 if none was removed