/**
* Move the cursor <i>where</i> characters, withough checking the current buffer.
*
* @see #where
* @param where the number of characters to move to the right or left.
*/
private final void moveInternal(final int where) throws IOException {
// debug ("move cursor " + where + " ("
// + buf.cursor + " => " + (buf.cursor + where) + ")");
buf.cursor += where;
char c;
if (where < 0) {
int len = 0;
for (int i = buf.cursor; i < buf.cursor - where; i++) {
if (buf.getBuffer().charAt(i) == '\t') len += TAB_WIDTH;
else len++;
}
char cbuf[] = new char[len];
Arrays.fill(cbuf, BACKSPACE);
out.write(cbuf);
return;
} else if (buf.cursor == 0) {
return;
} else if (mask != null) {
c = mask.charValue();
} else {
printCharacters(buf.buffer.substring(buf.cursor - where, buf.cursor).toCharArray());
return;
}
// null character mask: don't output anything
if (NULL_MASK.equals(mask)) {
return;
}
printCharacters(c, Math.abs(where));
}
/**
* Clear the buffer and add its contents to the history.
*
* @return the former contents of the buffer.
*/
final String finishBuffer() {
String str = buf.buffer.toString();
// we only add it to the history if the buffer is not empty
// and if mask is null, since having a mask typically means
// the string was a password. We clear the mask after this call
if (str.length() > 0) {
if (mask == null && useHistory) {
history.addToHistory(str);
} else {
mask = null;
}
}
history.moveToEnd();
buf.buffer.setLength(0);
buf.cursor = 0;
return str;
}