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>

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.

EditorBuffer

EditorBuffer(ConsoleDriver driver)

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