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 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package com.sun.glass.ui.lens;

import com.sun.glass.events.TouchEvent;
import com.sun.glass.events.MouseEvent;
import com.sun.glass.events.KeyEvent;
import com.sun.glass.ui.TouchInputSupport;
import com.sun.glass.ui.GestureSupport;
import com.sun.glass.ui.Application;
import com.sun.glass.ui.View;

import java.lang.Integer;
import java.security.AccessController;
import java.security.PrivilegedAction;


final class LensTouchInputSupport {

    /**
     * This property define the size of the tap radius which can be seen as the
     * 'finger size'. After the first tap, a touch point will be considered
     * STILL as long as the point coordinates are within the tap radius. When the
     * point coordinates move outside the tap radius the point will be considered
     * as 'dragging' and all move events will be reported as long as they are
     * greater then the touchMoveSensitivity property
     * Property is used by Lens native input driver
     *
     */
    static final int touchTapRadius;
    /**
     * This property determine the sensitivity of move events from touch. The
     * bigger the value the less sensitive is the touch screen. In practice move
     * events with a delta smaller then the value of this property will be
     * filtered out.The value of the property is in pixels.
     * Property is used by Lens native input driver
     */
    private static final int touchMoveSensitivity;

    /**
     * This property enables or disables input device pruning. When input
     * device pruning is enabled, only the first device input node of a
     * device is captured. So if an input device driver registers nodes
     * /dev/input/event2 and /dev/input/event3 for the same devices, only
     * the first node reported by udev is used.
     * Input device pruning is off by default.
     */
    private static final boolean pruneInputDevices;

    /**
     * This property enable/disable multi touch support by the input driver.
     * When the property is disabled and a multitouch screen is connected, the
     * input driver will 'downgrade' the screen events to a single touch
     * point, as if a single touch screen was connected
     *
     */
    private static final boolean useMultiTouch;

    /**
     * This property is used for printing raw events, device properties, device
     * attach / detach, low level Lens input driver decisions etc. Useful for
     * debugging a new input device that is not recognized or behave wrongly by
     * the Lens input driver. Property is disabled by default
                                        */
    private static final boolean enableDeviceTrace;

    static {
        touchTapRadius = AccessController.doPrivileged(
                (PrivilegedAction<Integer>) () -> Integer.getInteger("lens.input.touch.TapRadius", 20));

        touchMoveSensitivity = AccessController.doPrivileged(
                (PrivilegedAction<Integer>) () -> Integer.getInteger("lens.input.touch.MoveSensitivity", 20));

        pruneInputDevices = AccessController.doPrivileged(
                (PrivilegedAction<Boolean>) () -> Boolean.getBoolean("lens.input.pruneDevices"));

        useMultiTouch = AccessController.doPrivileged(
                (PrivilegedAction<Boolean>) () -> !(Boolean.getBoolean("lens.input.forceSingleTouch")));

        enableDeviceTrace = AccessController.doPrivileged(
                (PrivilegedAction<Boolean>) () -> Boolean.getBoolean("lens.input.trace"));

    }


    private final static GestureSupport gestures = new GestureSupport(false);
    private final static TouchInputSupport touches =
        new TouchInputSupport(gestures.createTouchCountListener(), false);

    static void postTouchEvent(LensView view, int state, long id,
                               int x, int y, int absX, int absY) {
        touches.notifyBeginTouchEvent(view, 0, true, 1);
        touches.notifyNextTouchEvent(view, state, id, x, y, absX, absY);
        touches.notifyEndTouchEvent(view);
    }

    static void postMultiTouchEvent(LensView view, int[] states, long[] ids,
                                    int[] xs, int[] ys, int dx, int dy) {
        touches.notifyBeginTouchEvent(view, 0, true, states.length);
        for (int i = 0; i < states.length; i++) {
            touches.notifyNextTouchEvent(view, states[i], ids[i],
                                         xs[i] + dx, ys[i] + dy,
                                         xs[i], ys[i]);
        }
        touches.notifyEndTouchEvent(view);
    }
}