Example #1
0
  /**
   * Calling this method will put the underlying terminal in private mode, clear the screen, move
   * the cursor and refresh.
   *
   * @throws LanternaException
   */
  public void startScreen() {
    if (hasBeenActivated) return;

    hasBeenActivated = true;
    terminal.enterPrivateMode();
    terminal.clearScreen();
    terminal.moveCursor(cursorPosition.getColumn(), cursorPosition.getRow());
    refresh();
  }
Example #2
0
  /**
   * Call this method to make changes done through {@code putCharacter(...)}, {@code putString(...)}
   * visible on the terminal. The screen will calculate the changes that are required and send the
   * necessary characters and control sequences to make it so.
   */
  public void refresh() {
    if (!hasBeenActivated) return;

    synchronized (mutex) {
      // If any resize operations are in the queue, execute them
      resizeScreenIfNeeded();

      Map<TerminalPosition, ScreenCharacter> updateMap =
          new TreeMap<TerminalPosition, ScreenCharacter>(new ScreenPointComparator());

      for (int y = 0; y < terminalSize.getRows(); y++) {
        for (int x = 0; x < terminalSize.getColumns(); x++) {
          ScreenCharacter c = backbuffer[y][x];
          if (!c.equals(visibleScreen[y][x]) || wholeScreenInvalid) {
            visibleScreen[y][x] =
                c; // Remember, ScreenCharacter is immutable, we don't need to worry about it being
            // modified
            updateMap.put(new TerminalPosition(x, y), c);
          }
        }
      }

      Writer terminalWriter = new Writer();
      terminalWriter.reset();
      TerminalPosition previousPoint = null;
      for (TerminalPosition nextUpdate : updateMap.keySet()) {
        if (previousPoint == null
            || previousPoint.getRow() != nextUpdate.getRow()
            || previousPoint.getColumn() + 1 != nextUpdate.getColumn()) {
          terminalWriter.setCursorPosition(nextUpdate.getColumn(), nextUpdate.getRow());
        }
        terminalWriter.writeCharacter(updateMap.get(nextUpdate));
        previousPoint = nextUpdate;
      }
      terminalWriter.setCursorPosition(
          getCursorPosition().getColumn(), getCursorPosition().getRow());
      wholeScreenInvalid = false;
    }
    terminal.flush();
  }
Example #3
0
 public int compare(TerminalPosition o1, TerminalPosition o2) {
   if (o1.getRow() == o2.getRow())
     if (o1.getColumn() == o2.getColumn()) return 0;
     else return new Integer(o1.getColumn()).compareTo(o2.getColumn());
   else return new Integer(o1.getRow()).compareTo(o2.getRow());
 }