/*

* Copyright (c) 2008 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:  Declares main application class.

 *

*/

#ifndef __KEYBOARD_H

#define __KEYBOARD_H

#include <e32std.h>

#include <w32std.h>

#include <e32event.h>

#include "hidinterfaces.h"

#include "hidkeys.h"

#include "layoutmgr.h"

#include "timeoutnotifier.h"

#include "bthidsettings.h"

class CField;

class CHidKeyboardDriver;

class CTimeOutTimer;

/*!

 HID keyboard driver class

 */

class CHidKeyboardDriver : public CHidDriver, public MTimeOutNotifier

    {

private:

    /*! Initialisation states */

    enum TKeyboardDriverState

        {

        EUninitialised, /*!< Driver has not been initialised */

        EInitialised, /*!< Driver is initialised */

        EDisabled

        /*!< The driver will not respond to interrupt data */

        };

    // Flags indicating which locking keys are active

    enum TLockVals

        {

        ENumLock = 1, ECapsLock = 2, EScrollLock = 4

        };

    // The types of keyboard input report fields that we handle:

    enum TKeyFieldType

        {

        EStandardKeys = 0,

        EModifierKeys = 1,

        EMediaKeys = 2,

        EPowerKeys = 3,

        KNumInputFieldTypes

        };

public:

    // Constructors and destructor

    /*!

     Creates an instantiated CHidKeyboardDriver object.

     @param aHid The generic HID layer that requested the driver

     @param aFactory aFactory The factory that created the driver

     @result A pointer to the instantiated keyboard driver

     */

    static CHidKeyboardDriver* NewL(MDriverAccess* aHid);

    /*!

     Creates an instantiated CHidKeyboardDriver object and leaves it on the

     cleanup stack.

     @param aHid The generic HID layer that requested the driver

     @param aFactory aFactory The factory that created the driver

     @result A pointer to the instantiated keyboard driver

     */

    static CHidKeyboardDriver* NewLC(MDriverAccess* aHid);

    /*!

     Stops driver activity, deletes the key repeat and decode objects and closes

     the window server session before the driver is deleted

     */

    virtual ~CHidKeyboardDriver();

public:

    // new functions

    /*!

     Called by the Generic HID layer to see if the driver can is able to use

     reports from a newly-connected device

     @result ETrue The driver can handle the reports

     @result EFalse The driver cannot handle the reports

     */

    virtual TInt CanHandleReportL(CReportRoot* aReportRoot);

    /*!

     Called by the Generic HID layer when a device has been removed, prior to the

     driver being removed.  This allows the driver to notify any applications of

     disconnection, if required

     @param aReason The reason for device disconnection

     */

    virtual void Disconnected(TInt aReason);

    /*!

     Called by the Generic HID layer when data has been received from the device

     handled by this driver.

     @param aChannel The channel on which the data was received (as defined by the

     transport layer

     @param aPayload A pointer to the data buffer

     */

    virtual TInt DataIn(CHidTransport::THidChannelType aChannel,

            const TDesC8& aPayload);

    /*!

     Called by the transport layers to inform the generic HID of the success of

     the last Set... command.

     @param aConnectionId ID of the device

     @param aCmdAck Status of the last Set... command

     */

    virtual void CommandResult(TInt aCmdAck);

    /*!

     Called after a driver is sucessfully created by the Generic HID, when a

     device is connected

     */

    virtual void InitialiseL(TInt aConnectionId);

    /*!

     Resets the internal state of the driver (any pressed keys are released) and

     enables the driver

     */

    virtual void StartL(TInt aConnectionId);

    /*!

     Cancels all pressed keys and disables the driver (so it will not

     process interrupt data)

     */

    virtual void Stop();

    /**

     * Return count of supported fields

     *

     * @since S60 v5.0     

     * @return Number of supported fields.

     */

    virtual TInt SupportedFieldCount();

    /**

     * Set input handling registy 

     *

     * @since S60 v5.0     

     * @param aHandlingReg  a Input handling registry

     */

    virtual void SetInputHandlingReg(CHidInputDataHandlingReg* aHandlingReg);

    // ----------------------------------------

    // Repeat key timer interface:

    /*!

     Callback function for the key repeat timer to trigger a repeat key event.

     */

    TInt OnKeyRepeat();

    static TInt TimerFiredOnKeyRepeat(TAny* aThis);

private:

    // Constructors

    // Constructor taking a pointer to the HID layer requesting the driver

    // instance

    CHidKeyboardDriver(MDriverAccess* aHid);

    void ConstructL();

private:

    // Functions from base classes

    /**

     * From MTimeoutNotifier

     */

    void TimerExpired();

private:

    // New Functions

    // Called from within DataIn to handle interrupt and control channel data

    void InterruptData(const TDesC8& aPayload);

    // Send key down / key up events to the window server:

    void KeyEvent(TBool aIsKeyDown, TInt aHidKey, TInt aUsagePage);

    TKeyEvent TKeyEventFromScanCode(TInt aScanCode) const;

    inline void KeyUp(TInt aHidKey, TInt aUsagePage);

    inline void KeyDown(TInt aHidKey, TInt aUsagePage);

    // Handles the states of the modifier keys

    void UpdateModifiers(TInt aFieldIndex, const TDesC8& aReport);

    // Handle key presses

    void ProcessKeys(TInt aFieldIndex, const TDesC8& aReport);

    // Determines whether too many keys have been pressed on the device

    TBool IsRollover(TInt aFieldIndex, const TDesC8& aReport) const;

    // Get current modifier state in the format used by TKeyEvent

    TUint32 KeyEventModifiers() const;

    // Resets the internal keypress states and sends keyup events if required

    void CancelKeysForField(TInt aFieldIndex);

    void CancelAllKeys();

    // Determines whether any lock (Caps,Num,scroll) keys are pressed

    void UpdateLockState(TInt aKey);

    // Sets the LEDs on the keyboard according to the keyboard state

    // (Not implemented)

    void SetKeyboardLeds() const;

    // Send a key event to the system

    void SendKeyPress(TUint16 aUnicode, TInt aUsagePage, TInt aScanCode,

            TBool aIsRepeatingKey);

    void SendToWindowGroup(const TKeyEvent& aKeyEvent, TEventCode aType);

    void SendToWindowServer(TKeyEvent aKeyEvent);

    // Determine which window group a key event should be sent to.

    // Except for special cases this is the window group with the focus.

    TInt WindowGroupForKeyEvent(const TKeyEvent& aKeyEvent, TEventCode aType);

    // Handles the sending of raw events to the phone application instead of key events.

    void HandleTelephoneAppKeys(TInt aScanCode, TInt aUniCode,

            TBool aIsKeyDown);

    // Checks if application launching key combination and launch a corresponding application

    void HandleApplicationLaunchKeysL(TUint16 aScancodeKey, TBool aIsKeyDown,

            TUint8 aModifiers);

    /**

     * CHidKeyboardDriver::LaunchApplicationL

     * @param aAppUid Application UID

     */

    void LaunchApplicationL(TInt aAppUid);

    // Checks if multimedia-key (play,stop,..) and sends to RemCon

            TUint8 aModifiers);

    TInt AppMenuId();

    TInt PhoneAppId();

    TInt IdleAppId();

    TBool IsApplicationMenuTopMost();

    TBool IsPhoneAppTopMost();

    // bitmap for Multimedia key states

    enum TMmKeyDown

        {

        };

    void ResetBitmap(TBool aIsKeyDown, TMmKeyDown aBitmapToReset);

    /**

     * Send raw key event to window server

     * @param aScancode key scancode

     * @param aModifiers modifier

     * @return Error code

     */

    TInt SendRawEvent(TInt aScancode, TBool aIsKeyDown, TUint aModifier);

    // ----------------------------------------

    static TInt ResetArrayToSize(RArray<TInt>& aArray, TInt aSize);

    TBool IsDigitKey(TInt aScanCode);

    TBool IsSpecialHandleKey(TInt aUniCode);

private:

    TKeyboardDriverState iDriverState;

    // Application UIDs

    TInt iConnectionId;

    TInt iAppMenuId;

    TInt iPhoneAppId;

    TInt iIdleAppId;

    // The Generic HID layer

    MDriverAccess *iGenericHid;

    // Arrays of keys currently pressed for each field:

    RArray<TInt> iKeys[KNumInputFieldTypes];

    // Pointers to the fields in the report descriptor containing the

    // various types of key:

    const CField* iField[KNumInputFieldTypes];

    // Pointer to the field in the report descriptor containing the LEDs:

    const CField* iLedField;

    // The current modifier state

    TUint8 iModifiers;

    // The current locking key states

    TUint8 iLockState;

    //Supported field types count

    TInt iSupportedFieldCount;

    // A window server session, so keypresses can be sent to applications:

    RWsSession iWsSession;

    // Timer object so the driver can generate repeat keypresses:

    CPeriodic *iRepeatTimer;

    // The last keypress event sent to the window server (allows key repeat)

    TKeyEvent iLastKey;

    // Layout manager session:

    RLayoutManager iLayoutMgr;

    // Settings handler class

    CBtHidSettings* iSettings;

    /*! The last keyboard layout selected by the user */

    THidKeyboardLayoutId iLastSelectedLayout;

    // Flag for Multimedia key state

    TUint8 iMmKeyDown;

    CHidInputDataHandlingReg* iInputHandlingReg;

    // This timer stops key repeating after defined time to prevent endless key repeats in error cases. Fix for EMKD-7FBB9H

    CTimeOutTimer* iRepeatEndTimer;

    };

// ----------------------------------------------------------------------

// Helpers for sending key events:

inline void CHidKeyboardDriver::KeyUp(TInt aHidKey, TInt aUsagePage)

    {

    KeyEvent(EFalse, aHidKey, aUsagePage);

    }

inline void CHidKeyboardDriver::KeyDown(TInt aHidKey, TInt aUsagePage)

    {

    KeyEvent(ETrue, aHidKey, aUsagePage);

    }

// ----------------------------------------------------------------------

#endif