/*

* 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 java.util.Hashtable;

import java.util.Vector;

import java.util.Enumeration;

import java.io.IOException;

import java.io.InputStream;

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

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

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

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

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

import com.nokia.mj.impl.rt.support.ApplicationUtils;

import com.nokia.mj.impl.rt.support.ApplicationInfo;

import com.nokia.mj.impl.rt.support.Finalizer;

import com.nokia.mj.impl.rt.support.ShutdownListener;

import com.nokia.mj.impl.utils.Logger;

final class Toolkit

{

    static

    {

        com.nokia.mj.impl.rt.support.Jvm.loadSystemLibrary("javalcdui");

        DirectGraphicsInvoker.createInvoker();

        FreeSizeFontInvoker.createInvoker();

        LcduiPropertyInvoker.createInvoker();

        CanvasGraphicsItemPainterInvoker.createInvoker();

    }

    private Finalizer mFinalizer = new Finalizer()

    {

        public void finalizeImpl()

        {

            doFinalize();

        }

    };

    //

    private static final String SERVER_NAME = "javax.microedition.lcdui";

    private static final String DEFAULT_MIDLET_NAME = "MIDlet ";

    private static final int    DEFAULT_MIDLET_UID  = 0x101F9515;

    // NGA specific change.

    // Java side doesn't support native (c++) style macro flags and

    // that is why Toolkit & ToolkitInvoker have been harnessed to substitutes

    // NGA flag & its index

    static final int FLAG_NONE = 0;

    static final int FLAG_NGA_INDEX = 0;

    static final int FLAG_NGA = 1 << FLAG_NGA_INDEX;

    // Defines total flag count. Must be keep up to date.

    private static final int FLAG_COUNT = 1;

    private static final String RESOURCE_OR_PLUGIN_NOT_FOUND =

        "Cannot find lcdui dll, or lcdgr dll or lcdui resource file";

    //

    private static int iServerCount;

    private ToolkitInvoker  iInvoker;

    private Object iDestroySync = new Object();

    private static final int HANDLE_UNINITIALIZED = -0xfffffe;

    private int     iHandle = HANDLE_UNINITIALIZED;

    private Device  iDevice;

    private Display iDisplay;

    private Image   iIcon;

    private MIDEventServer iEventServer;

    private Hashtable iFontCache;

    Buffer  iBuffer;

    private Object iCallbackLock;

    private Vector iObservers;

    private boolean iStartingInBackground = false;

    protected Vector tmpDisplayables;     //temporary Vector of created Displayables

    protected boolean activated = false;  //events are dispatched only if Toolkit is active, see Toolkit.start()

    // NGA specific change

    private int iFlags = FLAG_NONE;

    //

    // Event source : must keep in sync with TSourceType in lcdui.h

    //

    private static final int ITEM                           = 3;

    private static final int DISPLAYABLE                    = 4;

    private static final int MIDLET                         = 5;

    private static final int SERIAL                         = 6; // deprecated

    private static final int CANVAS_GRAPHICS_ITEM_PAINTER   = 7;

    //

    // Event type : must keep in sync with TEventType in lcdui.h

    //

    static final int EVENT_PAINT = 10;

    static final int EVENT_KEY_PRESSED      = 11;

    static final int EVENT_KEY_RELEASED     = 12;

    static final int EVENT_KEY_REPEATED     = 13;

    static final int EVENT_POINTER_PRESSED  = 14;

    static final int EVENT_POINTER_RELEASED = 15;

    static final int EVENT_POINTER_DRAGGED  = 16;

    static final int EVENT_SIZE_CHANGED     = 17;

    static final int EVENT_EXIT_REQUESTED = 18;

    static final int EVENT_FOREGROUND = 19;

    static final int EVENT_BACKGROUND = 20;

    static final int EVENT_PAUSE_REQUESTED   = 21;

    static final int EVENT_START_REQUESTED   = 22;

    static final int EVENT_DESTROY_REQUESTED = 23;

    static final int EVENT_COMMAND     = 24;

    static final int EVENT_VISIBLE     = 25;

    static final int EVENT_TRAVERSE    = 26;

    static final int EVENT_SET_CURRENT = 29;

    static final int EVENT_SERIAL      = 30;

    static final int EVET_CANVAS_GRAPHICS_ITEM_REPAINT = 31;

    // IMPLICIT EVENT TYPES

    static final int EVENT_DISMISS = 0;         // ALERT

    static final int EVENT_ITEM_CHANGED = 0;    // ITEM(S)

    static final int EVENT_SELECT  = 0;         // LIST

    //

    // Op codes for syncing to screen

    // These must be kept in sync with MMIDCanvas::TDrawOp

    //

    private static final int SYNC      = 0;

    private static final int SYNC_RECT = 1;

    // NGA specific change.

    // Op code indicating M3G content start

    private static final int M3G_CONTENT_START = 2;

    Toolkit(ToolkitInvoker aInvoker)

    {

        iInvoker     = aInvoker;

        tmpDisplayables = new Vector();

        iStartingInBackground = iInvoker.iStartInBackGround;

        ApplicationUtils.getInstance().addShutdownListener(new ShutdownListener()

        {

            public final void shuttingDown()

            {

                dispose();

            }

        });

    }

    /**

     * Initializes the Toolkit, if it is uninitialized.

     */

    private void ensureInitialized()

    {

        if (iEventServer == null)

        {

            initialize();

        }

    }

    /**

     * Initializes the Toolkit.

     */

    synchronized private void initialize()

    {

        if (iEventServer != null)

        {

            return;

        }

        /**

         * get UI server instance number

         */

        final String serverNumber = getServerNumber();

        /**

         * create mangled server name

         */

        final String serverName = SERVER_NAME.concat(serverNumber);

        ApplicationInfo appInfo = ApplicationInfo.getInstance();

        String appName = appInfo.getLocalizedName();

        if (null == appName)

        {

            appName = DEFAULT_MIDLET_NAME.concat(serverNumber);

        }

        int appUid = LegacyRtPort.getMidletUid();

        if (appUid == 0)

        {

            appUid = DEFAULT_MIDLET_UID;

        }

        String appHome = appInfo.getRootPath();

        if (appHome.endsWith("\\"))

        {

            appHome = appHome.substring(0, appHome.length() - 1);

        }

        /**

         * Create native event server + thread. This will run until shutdown

         * in Toolkit.dispose().

         */

        iEventServer  = new UiEventServer(serverName, appUid);

        iCallbackLock = new Object();

        final Hashtable properties = iInvoker.iMidletArgs;

        final String[]  attributes = new String [properties.size() * 2];

        int count = -1;

        for (final Enumeration keys = properties.keys(); keys.hasMoreElements();)

        {

            final String key = (String)keys.nextElement();

            attributes[++count] = key;

            attributes[++count] = (String)properties.get(key);

        }

        final int server = iEventServer.getHandle();

        // NGA specific change.

        // Array that will be filled with native flag macros

        int[] flags = new int[Toolkit.FLAG_COUNT];

        iHandle = _create(server, appName, appUid, appHome, attributes, flags);

        switch (iHandle)

        {

        case NativeError.KErrNotFound:

        case NativeError.KErrPathNotFound:

            throw new RuntimeException(RESOURCE_OR_PLUGIN_NOT_FOUND);

        default:

            checkHandle(iHandle); // leaves if error

            break;

        }

        // NGA specific change.

        // Update flags

        if (flags[Toolkit.FLAG_NGA_INDEX] > 0)

        {

            this.iFlags |= Toolkit.FLAG_NGA;

        }

        iDevice    = new Device(this);

        iBuffer    = new Buffer(this);

        iFontCache = new Hashtable();

    }

    InputStream getResourceAsStream(String aResource)

    throws

                IOException

    {

        return getClass().getResourceAsStream(aResource);

    }

    synchronized void start(Display aDisplay)

    {

        ensureInitialized();

        iDisplay = aDisplay;

        NativeError.check(_activate(iHandle));

        activated = true;

    }

    private static synchronized String getServerNumber()

    {

        return Integer.toString(++iServerCount);

    }

    /**

     * NGA specific change.

     * Check if flags are set.

     * @param flags Flags indexes

     * @return True if flags are on.

     * @since S60 9.2

     */

    boolean checkFlags(int flags)

    {

        return ((iFlags & flags) > 0);

    }

    public boolean isClosed()

    {

        return ((iHandle != HANDLE_UNINITIALIZED) &&

                (iHandle <= 0));

    }

    public int getHandle()

    {

        ensureInitialized();

        if (isClosed())

        {

            throw new RuntimeException("Toolkit closed");

        }

        return iHandle;

    }

    static Toolkit getToolkit()

    {

        ToolkitInvoker invoker = (ToolkitInvoker)ToolkitInvoker.getToolkitInvoker();

        return invoker.getCurrentToolkit();

    }

    final Device getDevice()

    {

        ensureInitialized();

        return iDevice;

    }

    final Display getDisplay()

    {

        ensureInitialized();

        return iDisplay;

    }

    final Object getCallbackLock()

    {

        ensureInitialized();

        return iCallbackLock;

    }

    final Hashtable getFontCache()

    {

        ensureInitialized();

        return iFontCache;

    }

    final synchronized void addObserver(ToolkitObserver aObserver)

    {

        if (aObserver == null)

        {

            return;

        }

        if (iObservers == null)

        {

            iObservers = new Vector(2);

        }

        if (!iObservers.contains(aObserver))

        {

            iObservers.addElement(aObserver);

        }

    }

    final synchronized void removeObserver(ToolkitObserver aObserver)

    {

        if ((iObservers != null) && (aObserver != null))

        {

            iObservers.removeElement(aObserver);

        }

    }

    /**

     * If toolkit is already disposed, then native object has already been deleted

     * aHandle can be null if exception thrown in the object's constructor (where the handle

     * is typically assigned

     */

    final synchronized void disposeObject(int aHandle)

    {

        ensureInitialized();

        if (aHandle == 0)

        {

            Logger.LOG(Logger.EJavaUI, Logger.EInfo,

                       "disposeObject(" + aHandle + ") < ignoring NULL handle");

            return;

        }

        if (iHandle <= 0)

        {

            Logger.LOG(Logger.EJavaUI, Logger.EInfo,

                       "disposeObject(" + aHandle + ") < : Toolkit already closed!");

            return;

        }

        //

        // Lock buffer for duration of dispose.

        //

        synchronized (iBuffer)

        {

            iBuffer.sync();

            _disposeObject(iHandle, aHandle);

        }

    }

    private void doFinalize()

    {

        if (mFinalizer != null)

        {

            registeredFinalize();

            mFinalizer = null;

        }

    }

    void registeredFinalize()

    {

        dispose();

    }

    final synchronized void dispose()

    {

        if ((iHandle == HANDLE_UNINITIALIZED) || (iHandle > 0))

        {

            //

            // Notify observers that toolkit is being destroyed.

            //

            if (null != iObservers)

            {

                final int lastIndex = iObservers.size() -1;

                for (int ii=lastIndex; ii>=0; ii--)

                {

                    final ToolkitObserver observer = (ToolkitObserver)iObservers.elementAt(ii);

                    try

                    {

                        observer.destroyNotify();

                    }

                    catch (Exception ex)

                    {

                        Logger.ELOG(Logger.EJavaUI,

                                    "exception thrown in destroyNotify: ", ex);

                        // close must complete otherwise could get panic, so ignore

                        // any exception thrown by observers.

                    }

                }

            }

            iInvoker.removeToolkit();

            if (null != iDisplay)

            {

                iDisplay.dispose();

                iDisplay = null;

            }

            //

            // Close the graphics buffer if present.

            //

            if (null != iBuffer)

            {

                synchronized (iBuffer)

                {

                    iBuffer.close();

                }

                iBuffer = null;

            }

            if (iHandle > 0)

            {

                _dispose(iHandle);

                iHandle = 0;

            }

            //

            // Shutdown the ui event thread.

            //

            if (iEventServer != null)

            {

                iEventServer.shutdown();

            }

        }

    }

    /* deprecated */

    private void handleAsyncEvent(Object aSource, int aResult)

    {

        ((AsyncCall)aSource).complete(aResult);

    }

    private boolean resetThread()

    {

        if (!isClosed())

        {

            return true;

        }

        return false;

    }

    private void handleItemEvent(Item aSource, int aEvent, int aParam0, int aParam1, int aParam2)

    {

        if (resetThread())

        {

            aSource.handleEvent(aEvent, aParam0, aParam1, aParam2);

        }

    }

    private void handleDisplayableEvent(Displayable aSource, int aEvent, int aParam0, int aParam1, int aParam2)

    {

        synchronized (iDestroySync)

        {

            //S60 Modification ==>

            try

            {

                if (resetThread())

                {

                    aSource.handleEvent(aEvent, aParam0, aParam1);

                }

            }

            catch (Throwable t)

            {

                String className = t.getClass().getName();

                int index = className.lastIndexOf('.');

                if (index != -1)

                {

                    className = className.substring(index + 1, className.length());

                }

                String errStr= "Exception in handleDisplayableEvent. Reason: "+className+

                               "\n  event is : "+aEvent+

                               "\n  source is : "+aSource+"\n  p0 is     : "+aParam0+

                               "\n  p1 is     : "+aParam1+"\n  p2 is     : "+aParam2;

                Logger.ELOG(Logger.EJavaUI,errStr, t);

                //Removing Displayable if is exception thrown

                if (tmpDisplayables.contains(this))

                {

                    tmpDisplayables.removeElement(this);

                }