/*
 * libbrlapi - A library providing access to braille terminals for applications.
 *
 * Copyright (C) 2006-2018 by
 *   Samuel Thibault <Samuel.Thibault@ens-lyon.org>
 *   Sébastien Hinderer <Sebastien.Hinderer@ens-lyon.org>
 *
 * libbrlapi comes with ABSOLUTELY NO WARRANTY.
 *
 * This is free software, placed under the terms of the
 * GNU Lesser General Public License, as published by the Free Software
 * Foundation; either version 2.1 of the License, or (at your option) any
 * later version. Please see the file LICENSE-LGPL for details.
 *
 * Web Page: http://brltty.com/
 *
 * This software is maintained by Dave Mielke <dave@mielke.cc>.
 */

package org.a11y.BrlAPI;

public class Brlapi extends Native implements Constants {
  protected final ConnectionSettings settings;
  protected final int fileDescriptor;

  public Brlapi (ConnectionSettings settings) throws Error {
    this.settings = new ConnectionSettings();
    fileDescriptor = openConnection(settings, this.settings);
  }

  protected void finalize () {
    closeConnection();
  }

  public String getHost () {
    return settings.host;
  }

  public String getAuth () {
    return settings.auth;
  }

  public int getFileDescriptor () {
    return fileDescriptor;
  }

  public int enterTtyMode (int tty) throws Error {
    return enterTtyMode(tty, null);
  }

  public int enterTtyMode (String driver) throws Error {
    return enterTtyMode(TTY_DEFAULT, driver);
  }

  public int enterTtyMode () throws Error {
    return enterTtyMode(null);
  }

  public void enterTtyModeWithPath (int[] ttys) throws Error {
    enterTtyModeWithPath(ttys, null);
  }

  public void writeDots (byte[] dots) throws Error {
    DisplaySize size = getDisplaySize();
    int count = size.getWidth() * size.getHeight();

    if (dots.length != count) {
      byte[] d = new byte[count];
      while (count > dots.length) d[--count] = 0;
      System.arraycopy(dots, 0, d, 0, count);
      dots = d;
    }

    super.writeDots(dots);
  }

  public void writeText (int cursor) throws Error {
    writeText(cursor, null);
  }

  public void writeText (String text) throws Error {
    writeText(CURSOR_OFF, text);
  }

  public void writeText (String text, int cursor) throws Error {
    writeText(cursor, text);
  }

  public void writeText (int cursor, String text) throws Error {
    if (text != null) {
      DisplaySize size = getDisplaySize();
      int count = size.getWidth() * size.getHeight();

      {
        StringBuffer sb = new StringBuffer(text);
        while (sb.length() < count) sb.append(' ');
        text = sb.toString();
      }

      text = text.substring(0, count);
    }

    super.writeText(cursor, text);
  }
}
