/** Output put the prompt + the current buffer */
public final void drawLine() throws IOException {
if (prompt != null) {
printString(prompt);
}
printString(buf.buffer.toString());
if (buf.length() != buf.cursor) // not at end of line
back(buf.length() - buf.cursor); // sync
}
/**
* Redraw the rest of the buffer from the cursor onwards. This is necessary for inserting text
* into the buffer.
*
* @param clear the number of characters to clear after the end of the buffer
*/
private final void drawBuffer(final int clear) throws IOException {
// debug ("drawBuffer: " + clear);
char[] chars = buf.buffer.substring(buf.cursor).toCharArray();
if (mask != null) Arrays.fill(chars, mask.charValue());
printCharacters(chars);
clearAhead(clear);
back(chars.length);
flushConsole();
}
/** 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;
}
/**
* Output the specified {@link Collection} in proper columns.
*
* @param stuff the stuff to print
*/
public void printColumns(final Collection stuff) throws IOException {
if ((stuff == null) || (stuff.size() == 0)) {
return;
}
int width = getTermwidth();
int maxwidth = 0;
for (Iterator i = stuff.iterator();
i.hasNext();
maxwidth = Math.max(maxwidth, i.next().toString().length())) {;
}
StringBuffer line = new StringBuffer();
int showLines;
if (usePagination) showLines = getTermheight() - 1; // page limit
else showLines = Integer.MAX_VALUE;
for (Iterator i = stuff.iterator(); i.hasNext(); ) {
String cur = (String) i.next();
if ((line.length() + maxwidth) > width) {
printString(line.toString().trim());
printNewline();
line.setLength(0);
if (--showLines == 0) { // Overflow
printString(loc.getString("display-more"));
flushConsole();
int c = readVirtualKey();
if (c == '\r' || c == '\n') showLines = 1; // one step forward
else if (c != 'q') showLines = getTermheight() - 1; // page forward
back(loc.getString("display-more").length());
if (c == 'q') break; // cancel
}
}
pad(cur, maxwidth + 3, line);
}
if (line.length() > 0) {
printString(line.toString().trim());
printNewline();
line.setLength(0);
}
}
/** Clear ahead the specified number of characters without moving the cursor. */
private final void clearAhead(final int num) throws IOException {
if (num == 0) {
return;
}
// debug ("clearAhead: " + num);
// print blank extra characters
printCharacters(' ', num);
// we need to flush here so a "clever" console
// doesn't just ignore the redundancy of a space followed by
// a backspace.
flushConsole();
// reset the visual cursor
back(num);
flushConsole();
}
