gecko/mobile/android/base/util/GamepadUtils.java

/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package org.mozilla.gecko.util;

import android.os.Build;
import android.view.InputDevice;
import android.view.KeyEvent;
import android.view.View;

public final class GamepadUtils {
    private static View.OnKeyListener sClickDispatcher;

    private GamepadUtils() {
    }

    private static boolean isGamepadKey(KeyEvent event) {
        if (Build.VERSION.SDK_INT >= 9) {
            return (event.getSource() & InputDevice.SOURCE_GAMEPAD) == InputDevice.SOURCE_GAMEPAD;
        }
        return false;
    }

    public static boolean isActionKey(KeyEvent event) {
        return (isGamepadKey(event) && (event.getKeyCode() == KeyEvent.KEYCODE_BUTTON_A));
    }

    public static boolean isBackKey(KeyEvent event) {
        return (isGamepadKey(event) && (event.getKeyCode() == KeyEvent.KEYCODE_BUTTON_B));
    }

    public static View.OnKeyListener getClickDispatcher() {
        if (sClickDispatcher == null) {
            sClickDispatcher = new View.OnKeyListener() {
                @Override
                public boolean onKey(View v, int keyCode, KeyEvent event) {
                    if (event.getAction() == KeyEvent.ACTION_DOWN && isActionKey(event)) {
                        return v.performClick();
                    }
                    return false;
                }
            };
        }
        return sClickDispatcher;
    }
}