/*

* Copyright (c) 2002 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:

*

*/

#ifndef CMIDENV_H

#define CMIDENV_H

#include <e32def.h>

#include <lcdui.h>

class CMIDKeyTranslator;

class CMIDToolkit;

class CMIDToLcduiObserver;

/**

 *

 * A MIDlet environment, one per MIDlet, providing utility methods for the

 * MIDP implementation

 *

 */

class CMIDEnv : public CBase, public MMIDEnv

{

public:

    CMIDEnv(CMIDToolkit* aToolkit, const TSize& aSize);

    void ConstructL();

    ~CMIDEnv();

    void SetUtils(MMIDUtils* aUtils);

public:

    virtual TBool PostJavaEvent(MMIDComponent& aSource,TSourceType aSourceType,TEventType aEventType,TInt aEventData,TInt aEventData1,TInt aEventData2);

    virtual TBool PostJavaEvent(MMIDComponent& aSource,TSourceType aSourceType,TEventType aEventType=ENoType,TInt aEventData=0);

    virtual TBool PostJavaEvent(MMIDComponent& aSource,TSourceType aSourceType,TInt aEventData);

    virtual TBool PostMidletEvent(TEventType aEventType);

    virtual MMIDNotifyEvent* NewNotifyL(MMIDComponent& aSource);

    virtual TBool   PostJavaNotify(MMIDNotifyEvent* aNotify);

    virtual TBool   TranslateKeyL(TMIDKeyEvent& aEvent, const TKeyEvent&, TEventCode aType);

    virtual TBool   PostKeyEvent(MMIDComponent& aSource, TMIDKeyEvent& aEvent);

    virtual void    ResetKeys();

    virtual MMIDDisplayable* Current();

    virtual TPtrC MidletName() const;

    virtual TUid MidletUid() const;

    virtual TPtrC MidletHome() const;

    virtual void DisplayableIsDestructed(const MMIDDisplayable* displayable);

#ifdef RD_SCALABLE_UI_V2

    // This function can be moved out from RD_SCALABLE_UI_V2 flag if needed.

    // It is behind this flag because currently it is used only by Touch.

    /**

    * Returns MIDlet Suite uid that is parsed from the MIDlet home path.

    * In practise this function assumes that the midlet home path includes

    * Midlet suite uid inside the brackets, for example:

    * "e:\epoc32\winscw\c\private\102033E6\MIDlets\[101e0a27]"

    *

    * Note:

    * MIDlet suite uid could be retrieved from the Java registry based on

    * the midlet uid. But that operation is very time consuming because it

    * requires lot of file accessing, especially when there are many midlets

    * installed in the device.

    * @since S60 5.0

    * @return   TUid iMidletSuiteUid or

    *            KNullUidValue if midlet suite uid not found or error occured.

    */

    TUid MidletSuiteUid();

#endif //RD_SCALABLE_UI_V2

    virtual TInt NumColors();

    virtual TDisplayMode DisplayMode();

    virtual void  SetCanvasZoomSize(const TSize& aSize);

    virtual TSize CanvasZoomSize();

    virtual TSize CanvasAssumedSize();

    virtual TInt MidletAttribute(const TDesC& aAttributeName, TPtrC& aAttributeValue);

    /**

     * @see MMIDEnv#MidletAttributeIsSetToVal()

     */

    virtual TBool MidletAttributeIsSetToVal(const TDesC& aAttributeName, const TDesC& aAttributeValue);

    /**

     * @see MMIDEnv#MidletAttributeContainsVal()

     */

    virtual TBool MidletAttributeContainsVal(const TDesC& aAttributeName, const TDesC& aAttributeValue);

    virtual void SetCanvasAssumedSize(const TSize& aSize);

    //

    virtual void AddObserverL(MMIDEnvObserver& aObserver);

    virtual void RemoveObserver(MMIDEnvObserver& aObserver);

    //

    void HandleSwitchOnL(TBool aSwitchOn);

    void HandleForegroundL(TBool aForeground);

    void HandleResourceChangeL(TInt aType);

    /**

     * @see MMIDEnv#ReserveCanvasFrameBuffer()

     */

    virtual CFbsBitmap* ReserveCanvasFrameBufferL(MMIDCanvas& aCanvas, const TSize& aSz);

    /**

     * @see MMIDEnv#ReleaseCanvasFrameBuffer()

     */

    virtual void ReleaseCanvasFrameBuffer(MMIDCanvas& aCanvas, CFbsBitmap*& aFrameBuffer);

    /**

     * @see MMIDEnv#CanvasHasBackground()

     */

    virtual TBool CanvasHasBackground(const MMIDCanvas& aCanvas) const;

    /**

     * Maps low level key event

     * @param    aMidKeyEvent key event output data

     * @param    aEvent key event input data

     * @see    virtual void MMIDEnv::MappingDataForKey( TKeyEvent& aEvent );

     */

    virtual void MappingDataForKey(TKeyEvent& aEvent, TEventCode aType);

    /**

     * Set last key event

     * @param    aEvent key event input data

     * @see    virtual void MMIDEnv::SetLastKeyEvent( const TKeyEvent& aEvent );

     */

    virtual void SetLastKeyEvent(const TKeyEvent& aEvent);

    /**

     * From MMIDEnv.

     * Gets an instance of ToLcduiObserver.

     *

     * @since S60 5.0

     * @return Pointer to ToLcduiObserver instance

     * @see iToLcduiObserver

     */

    virtual MMIDToLcduiObserver& ToLcduiObserver();

#ifdef RD_JAVA_NGA_ENABLED

    /**

     * @see MMIDEnv#IsHardwareAccelerated()

     */

    virtual TBool IsHardwareAcceleratedL(

        MMIDEnv::THardwareType aHardwareType = MMIDEnv::EHardware3D);

private:

    /**

     * Checks and initializes 2D & 3D harware status

     * @return Hardware status @see MMIDEnv::THardwareType

     * @since S60 9.2

     */

    TInt InitHardwareStatusL();

#endif // RD_JAVA_NGA_ENABLED

private:

    /**

     * Encapsulated canvas (frame buffer) data

     */

    struct TCanvasData

    {

        /**

         * Ctor

         */

        TCanvasData()

                : iRefCount(0), iFrameBuffer(NULL), iHasBackground(EFalse)

        {

        }

        /**

         * Reset frame buffer data

         */

        inline void Reset()

        {

            delete iFrameBuffer;

            iFrameBuffer = NULL;

            iRefCount = 0;

        }

        TUint                       iRefCount;

        CFbsBitmap*                 iFrameBuffer;

        TBool                       iHasBackground;

        RMutex                      iLock;

    };

    /**

     * Autolocker class.

     */

    class TMutexAutoLock

    {

    public:

        /**

         * Ctor

         * @param aLock Syncronization primitive that is locked during construction

         */

        TMutexAutoLock(RMutex* aLock) : iLock(aLock)

        {

            iLock->Wait();

        }

        /**

         * Dtor. Signals the synchronization primitive

         */

        ~TMutexAutoLock()

        {

            iLock->Signal();

        }

    private:

        RMutex* iLock;

    };

    /**

     * Create a frame buffer for a <code>MMIDCanvas</code> instance.

     * @param   aCanvas Target canvas

     * @param   aWsBitmap If <code>ETrue</code> then the type of the frame buffer

     *          will be <code>WsBitmap</code> instead of a <code>CFbsBitmap</code>.

     * @param   aSz Frame buffer size

     * @return  Frame buffer instance

     * @since S60 5.0

     */

    CFbsBitmap* CreateCanvasFrameBufferL(

        MMIDCanvas& aCanvas, TBool aWsBitmap, const TSize& aSz);

private:

    enum {EGranularity = 4};

private:

    CMIDToolkit*                iToolkit;

    RArray<MMIDEnvObserver*>    iObservers;

    CMIDKeyTranslator*          iKeyTranslator;

    TSize                       iCanvasAssumedSize;

    TSize                       iCanvasZoomSize;

    TCanvasData                 iCanvasData;

#ifdef RD_SCALABLE_UI_V2

    // MIDlet suite uid

    TUid                        iMidletSuiteUid;

#endif //RD_SCALABLE_UI_V2

    /**

     * Provides possibility to make calls from non-LCDUI threads

     * to LCDUI ES thread.

     * Own.

     */

    CMIDToLcduiObserver*        iToLcduiObserver;

#ifdef RD_JAVA_NGA_ENABLED

    TInt                        iHardwareStatus;

#endif // RD_JAVA_NGA_ENABLED

};

#endif // CMIDENV_H