/**
* Issue <em>num</em> deletes.
*
* @return the number of characters backed up
*/
private final int delete(final int num) throws IOException {
/* Commented out beacuse of DWA-2949:
if (buf.cursor == 0)
return 0;*/
buf.buffer.delete(buf.cursor, buf.cursor + 1);
drawBuffer(1);
return 1;
}
public final boolean replace(int num, String replacement) {
buf.buffer.replace(buf.cursor - num, buf.cursor, replacement);
try {
moveCursor(-num);
drawBuffer(Math.max(0, num - replacement.length()));
moveCursor(replacement.length());
} catch (IOException e) {
e.printStackTrace();
return false;
}
return true;
}
/** Clear the echoed characters for the specified character code. */
int clearEcho(int c) throws IOException {
// if the terminal is not echoing, then just return...
if (!terminal.getEcho()) {
return 0;
}
// otherwise, clear
int num = countEchoCharacters((char) c);
back(num);
drawBuffer(num);
return num;
}
/** Delete the character at the current position and redraw the remainder of the buffer. */
private final boolean deleteCurrentCharacter() throws IOException {
boolean success = buf.buffer.length() > 0;
if (!success) {
return false;
}
if (buf.cursor == buf.buffer.length()) {
return false;
}
buf.buffer.deleteCharAt(buf.cursor);
drawBuffer(1);
return true;
}
/**
* Issue <em>num</em> backspaces.
*
* @return the number of characters backed up
*/
private final int backspace(final int num) throws IOException {
if (buf.cursor == 0) {
return 0;
}
int count = 0;
count = moveCursor(-1 * num) * -1;
// debug ("Deleting from " + buf.cursor + " for " + count);
buf.buffer.delete(buf.cursor, buf.cursor + count);
drawBuffer(count);
return count;
}
/** Output the specified character, both to the buffer and the output stream. */
private final void putChar(final int c, final boolean print) throws IOException {
buf.write((char) c);
if (print) {
// no masking...
if (mask == null) {
printCharacter(c);
}
// null mask: don't print anything...
else if (mask.charValue() == 0) {;
}
// otherwise print the mask...
else {
printCharacter(mask.charValue());
}
drawBuffer();
}
}
/** Write out the specified string to the buffer and the output stream. */
public final void putString(final String str) throws IOException {
buf.write(str);
printString(str);
drawBuffer();
}
/**
* Redraw the rest of the buffer from the cursor onwards. This is necessary for inserting text
* into the buffer.
*/
private final void drawBuffer() throws IOException {
drawBuffer(0);
}