/*

* Copyright (c) 1999 - 2004 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

package javax.microedition.lcdui;

import com.nokia.mj.impl.rt.legacy.NativeError;

//

// Provides information about device capabilities

//

final class Device

{

    Toolkit iToolkit;

    static final int CAPS_POINTER_EVENTS = 1;

    static final int CAPS_POINTER_MOTION_EVENTS = 2;

    static final int CAPS_KEY_REPEAT_EVENTS = 4;

    static final int CAPS_COLOR = 8;

    static final int CAPS_DOUBLE_BUFFERED = 16;

    static final int ATTRIB_CAPABILITIES = 0;

    static final int ATTRIB_NUM_COLORS   = 1;

    static final int ATTRIB_NUM_ALPHAS   = 2;

    static final int ATTRIB_SCREEN_WIDTH = 3;

    static final int ATTRIB_SCREEN_HEIGHT = 4;

    static final int ATTRIB_COUNT = 5;

    int iScreenWidth;     // full screen width

    int iScreenHeight;    // full screen height

    final int iNumColors;

    final int iNumAlphas;

    final boolean iHasPointerEvents;

    final boolean iHasPointerMotionEvents;

    final boolean iHasRepeatEvents;

    final boolean iIsDoubleBuffered;

    final boolean iIsColor;

    Device(Toolkit aToolkit)

    {

        iToolkit = aToolkit;

        final int[] attribs = new int[ATTRIB_COUNT];

        NativeError.check(_getAttribs(aToolkit.getHandle(), attribs));

        final int caps = attribs[ATTRIB_CAPABILITIES];

        iHasPointerEvents       = (caps & CAPS_POINTER_EVENTS) == CAPS_POINTER_EVENTS;

        iHasPointerMotionEvents = (caps & CAPS_POINTER_MOTION_EVENTS) == CAPS_POINTER_MOTION_EVENTS;

        iHasRepeatEvents        = (caps & CAPS_KEY_REPEAT_EVENTS) == CAPS_KEY_REPEAT_EVENTS;

        iIsColor = (caps & CAPS_COLOR) == CAPS_COLOR;

        iIsDoubleBuffered = (caps & CAPS_DOUBLE_BUFFERED) == CAPS_DOUBLE_BUFFERED;

        iNumColors = attribs[ATTRIB_NUM_COLORS];

        iNumAlphas = attribs[ATTRIB_NUM_ALPHAS];

        iScreenWidth  = attribs[ATTRIB_SCREEN_WIDTH];

        iScreenHeight = attribs[ATTRIB_SCREEN_HEIGHT];

    }

    final boolean hasPointerEvents()

    {

        return iHasPointerEvents;

    }

    final boolean hasPointerMotionEvents()

    {

        return iHasPointerMotionEvents;

    }

    final boolean hasRepeatEvents()

    {

        return iHasRepeatEvents;

    }

    final boolean isDoubleBuffered()

    {

        return iIsDoubleBuffered;

    }

    // Display requirements:

    final boolean isColor()

    {

        return iIsColor;

    }

    final int numColors()

    {

        return iNumColors;

    }

    final int numAlphas()

    {

        return iNumAlphas;

    }

    final int getScreenWidth()

    {

        return iScreenWidth;

    }

    final int getScreenHeight()

    {

        return iScreenHeight;

    }

    public final void getDeviceSizeWithoutKeypad()

    {

        final int[] size = new int[2];

        // This method is called during construction of Canvas,

        // then we need check variables to null.

        if (iToolkit != null)

        {

            Display display = iToolkit.getDisplay();

            if (display != null)

            {

                Displayable displayable = display.getCurrent();

                if (displayable != null)

                {

                    _getCanvasSizeWithoutKeypad(iToolkit.getHandle(),

                                                displayable.getContainerHandle(),

                                                size);

                    iScreenWidth  = size[0];

                    iScreenHeight = size[1];

                }

            }

        }

    }

    private native int _getAttribs(int aToolkit, int[] aAttribs);

    private native void _getCanvasSizeWithoutKeypad(int aToolkit, int aDisplayable, int[] aSize);

}