//
// Nenya library - tools for developing networked games
// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
// https://github.com/threerings/nenya
//
// This library is free software; you can redistribute it and/or modify it
// 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.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

package com.threerings.util;

import java.util.Iterator;

/**
 * The key translator interface provides a means whereby the keyboard manager can map a key code to
 * the logical {@link com.samskivert.swing.Controller} action command that it represents.
 */
public interface KeyTranslator
{
    /**
     * Returns whether there is an action command for the key corresponding to the given keycode.
     * The translator may have an action command for either a key press or a key release of the key,
     * or both.
     */
    public boolean hasCommand (int keyCode);

    /**
     * Returns whether there is an action command for the key corresponding to the given character
     * in the case of a keyTyped event corresponding to it.
     */
    public boolean hasCommand (char ch);

    /**
     * Returns the action command string associated with a key press of the key corresponding to
     * the given key code, or <code>null</code> if there is no associated command.
     */
    public String getPressCommand (int keyCode);

    /**
     * Returns the action command string associated with a key press of the given character,
     * or <code>null</code> if there is no associated command.
     */
    public String getPressCommand (char ch);

    /**
     * Returns the action command string associated with a key release of the key corresponding to
     * the given key code, or <code>null</code> if there is no associated command.
     */
    public String getReleaseCommand (int keyCode);

    /**
     * Returns the action command string associated with a key release of the given character,
     * or <code>null</code> if there is no associated command.
     */
    public String getReleaseCommand (char ch);

    /**
     * Returns the number of times each second that key presses are to be automatically repeated
     * while the key is held down, or <code>0</code> to disable auto-repeat for the key.
     */
    public int getRepeatRate (int keyCode);

    /**
     * Returns the number of times each second that key presses are to be automatically repeated
     * while the key is held down, or <code>0</code> to disable auto-repeat for the key.
     */
    public int getRepeatRate (char ch);

    /**
     * Returns the delay in milliseconds before generating auto-repeated key press events for the
     * specified key.
     */
    public long getRepeatDelay (int keyCode);

    /**
     * Returns the delay in milliseconds before generating auto-repeated key press events for the
     * specified key.
     */
    public long getRepeatDelay (char ch);

    /**
     * Returns an iterator that iterates over the available press commands.
     */
    public Iterator<String> enumeratePressCommands ();

    /**
     * Returns an iterator that iterates over the available release commands.
     */
    public Iterator<String> enumerateReleaseCommands ();
}
