// Copyright (c) 1999-2009 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:

// Definition of classes for the class that deals with client communication

// 

//

#ifndef __CLIENT_H__

#define __CLIENT_H__

#include <Graphics/WSGRAPHICDRAWERINTERFACE.H>

#include "WSGRAPHICDRAWERARRAY.H"

#include <e32std.h>

#include <e32base.h>

#include "W32STD.H"

#include "w32cmd.h"

#include "WSOBJIX.H"

#include "EVQUEUE.H"

#include "PRIKEY.H"

#include "wstypes.h"

#include <e32hashtab.h>  //RHashMap

class CWsWindowBase;

class CWsClientWindow;

class CWsPointerCursor;

class CWsCustomTextCursor;

class CWsSpriteBase;

class DWsScreenDevice;

class CScreen;

class RHandleBase;

class CWsGraphicDrawerObject;

class CWsGraphicDrawer;

class MWsElement;

class TSurfaceConfiguration;

class CWsRedrawMsgWindow;

/** Server-side object for a client session.

@internalComponent

@released

*/

class CWsClient : public CSession2, public MWsClient

	{

private:

	friend class CWsRedrawMsgWindow;

private:

	class TWsCursorArrayItem;

	enum{EObjectGranularity=5};

	enum{ENoDefaultSystemPointerCursor=-1};

public:

	enum{EPanicLeave=1};

public: // from MWsClient

	TBool HasCapability(TCapability aCapability) const;

	TSecureId SecureId() const;

	TVendorId VendorId() const;

public:

	CWsClient(RThread aClient);

	~CWsClient();

	static void InitStaticsL();

	static void DeleteStatics();

	inline TBool NotClosing() const;

	inline CWsObjectIx* ObjectIndex();

	inline const RMessage2& ClientMessage() const;

	inline const RThread& Client() const;

	static inline CWsClient* CurrentClient();

	inline TInt ConnectionHandle() const;

	inline DWsScreenDevice* PrimaryScreenDevice();

	inline const DWsScreenDevice* PrimaryScreenDevice() const;

	inline CScreen* Screen();

	inline const CScreen* Screen() const;

	static CWsPointerCursor* SystemPointerCursor(TInt aIndex);

	static inline CWsPointerCursor* DefaultSystemPointerCursor();

	static CWsCustomTextCursor* FindCustomTextCursor(TInt aIdentifier);

	void SessionPanic(TClientPanic aReason) const;

	// Window object access from handle

	void HandleToWindow(TInt aHandle, CWsWindowBase** pWin);

	void HandleToClientWindow(TInt aHandle, CWsClientWindow** pWin);

	// Generic WsObject access from handle

	CWsObject* HandleToObj(TInt aHandle, WH_HANDLES aType);

	const CWsObject* HandleToObj(TInt aHandle, WH_HANDLES aType) const;

	CWsObject* HandleToObjUntyped(TInt aHandle);

	const CWsObject* HandleToObjUntyped(TInt aHandle) const;

	CWsGraphicDrawerObject* DrawerObject(const CWsGraphicDrawer* aDrawer);

	const CWsGraphicDrawerObject* DrawerObject(const CWsGraphicDrawer* aDrawer) const;

	// Handle from object

	inline TInt ObjectHandle(const CWsObject* aThis) const;

	// Queue access

	inline CEventQueue* EventQueue();

	inline const CEventQueue* EventQueue() const;

	inline CRedrawQueue* RedrawQueue();

	inline const CRedrawQueue* RedrawQueue() const;	

	// Execute client command from buffer

	void ExecuteCommandL(TInt aOpcode, const TAny* aCmdData);

	static const TUint8* EndOfCommandBuffer();

	static const TPtrC BufferTPtr(TText* aStart,TInt aLen);

	static TBool BufferTPtrGc(TText* aStart,TInt aLen,TPtrC& aPtr);

	static const TPtrC8 BufferTPtr8(TUint8* aStart,TInt aLen);

	// Remote read data from client

	void RemoteRead(TDes16& aDes, TInt aOffset);

	void RemoteRead(TDes8& aDes, TInt aOffset);

	void RemoteReadL(TDes16& aDes, TInt aOffset);

	void RemoteReadL(TDes8& aDes, TInt aOffset);

	// Send the reply to the client's request

	void SetResponseHandle(RHandleBase* aHandle);

	static void ReplyBuf(const TAny* aSource, TInt aLength);

	static void ReplyBuf(const TDesC8 &aDes);

	static void ReplyBuf(const TDesC16 &aDes);

	static void ReplySize(const TSize &aSize);

	static void ReplyPoint(const TPoint &aPoint);

	static void ReplyRect(const TRect &aRect);

	static void ReplyGroupName(HBufC* aName, TInt aMaxLength);

	static void SetReply(TInt reply);

	void RequestComplete(TRequestStatus*& aStatus, TInt aErr);

	// Panic or terminate the client

	static void PanicCurrentClient(TClientPanic aPanic);

	static TInt ReplyBufSpace()  ;

	void PPanic(TClientPanic aPanic) const;

	void SessionTerminate();

	// All events

	inline void EventReady(const RMessagePtr2& aEventMsg);

	// Pointer events

	inline void PurgePointerEvents();

	// Key events

	inline void PriorityKeyPressed(TInt aHandle, const TKeyData &aKey, TInt aScanCode);

	// Notification of misc events

	void AddNotificationL(TInt aKey, const RMessage2& aClientMsg);

	void CompleteNotification(TInt aKey, TInt aReason);

	inline void NotifyScreenDeviceDeleted(DWsScreenDevice* aDeletedScreenDevice);

	// Redraw

	void TriggerRedraw();

	// Misc

	void UpdateWindowOrdinalPrioritys();

	void SetClientPriority();	// boost when in foreground

	void CreateDrawableSourceL(const TWsClCmdCreateDrawableSource& aDrawableSourceData);

	//retry putting events on event queue

	void SetRetryFlag(TEventCode aEventCode);

	void RemoveRetryFlag(TEventCode aEventCode);

	TBool RetryEvent(TEventCode aEventCode);

    inline void WgMsgQueueOverflow();// Set flag  window group message queue is overflow and has pending messages

private: // from MWsClient

	TInt SendMessage(const CWsGraphicDrawer* aOnBehalfOf, const TDesC8& aData);

	TInt SendMessage(const CWsGraphicDrawer* aOnBehalfOf, CWsMessageData& aData);

private: // from CSession2

	void ServiceL(const RMessage2 &aMessage);

	void ServiceError(const RMessage2& aMessage,TInt aError);

private:

	// Construction and destruction

	inline TBool IsInitialised();

	void StartInitializationL(TUint aConnectionHandle);

	void CompleteInitializationL();

	void InitialiseScreenDevices();

	// Service client commands by dispatching them to the object associated with the op code

	void DoServiceL(const RMessage2& aMessage, TBool& aCompleteRequest);

	void DoServiceCommandBuf();

	void DispatchCommandsInBufL();

	void CompleteMessage(const RMessage2& aMessage,TInt aReason);

	// Execute async client commands

	void ExecuteAsyncClientCommandL(TInt aOpcode, const RMessage2& aMessage);

	static inline TBool CheckBuffer(TInt aLength, TInt aMaxLength);

	static TBool DebugEnforceRedrawCallingConvention();

	// Create new objects

	void CreateNewWindowGroupL(const TWsClCmdCreateWindowGroup &aCmd);

	void CreateNewWindowL(const TWsClCmdCreateWindow &aCmd);

	void CreateNewAnimDllL(const TWsClCmdUnion &aParams);

	void CreateNewSpriteL(const TWsClCmdCreateSprite &aCmd);

	void CreateNewPointerCursorL(const TWsClCmdCreatePointerCursor &aCmd);

	void CreateNewBitmapL(const TWsClCmdCreateBitmap &aCmd);

	void CreateNewClickHandlerL(const TUid& aUid);

	void CreateNewScreenDeviceL( TInt aDefaultScreenNumber, TUint aClientScreenDevicePointer);

	// Surface management

	TInt RegisterSurface(const TWsClCmdUnion& pData);

	void UnregisterSurface(const TWsClCmdUnion& pData);

	// Text cursor

	static inline CWsCustomTextCursor*& TextCursor (TInt aPosition);

	void StartSetCustomTextCursorL(const TWsClCmdCustomTextCursorData& aCmd);

	void CompleteSetCustomTextCursorL(TInt aErr);

	// Pointer cursor

	static inline CWsPointerCursor*& PointerCursor (TInt aPosition);

	void SetSystemPointerCursorL(TInt aIndex, CWsPointerCursor* aCursor);

	void ClearSystemPointerCursor(TInt aIndex);

	void ClaimSystemPointerCursorListL();

	void FreeSystemPointerCursorList();

	void SetDefaultSystemPointerCursor(TInt aIndex);

	static void DeleteSystemPointerListEntry(TInt aIndex);

	static TBool FindCursorArrayItem(CArrayFixFlat<TWsCursorArrayItem>* aCursorArray,

									  TInt aIndex, TInt& aPosition);

	// Key events

	inline void CancelClientRequestForPriorityKeyEvent();

	inline void HandleClientRequestForPriorityKeyData();

	inline void PriorityKeyEventReady(const RMessagePtr2& aEventMsg);

	// Redraw events

	inline void CancelClientRequestForRedrawEvent();

	inline void HandleClientRequestForRedrawData();

	inline void RedrawEventReady(const RMessagePtr2& aEventMsg);

	inline TBool ClientProcessingRedrawEvent();

	// Client event requests

	inline void HandleClientRequestForEventData();

	inline void CancelClientRequestForEventData();

	// Debugging

	void DebugInfoL(TInt aFunction, TInt aParam, TBool aHasReplyBuf) const;

	void DebugInfoUnclassifiedL(TInt aFunction, TInt aParam, TBool aHasReplyBuf) const;

	TInt DebugInfoClassifiedL(TInt aFunction, TInt aParam, TBool aHasReplyBuf) const;

	TInt DebugInfoScreenUiL(TInt aFunction, TInt aParam, TInt aReplyBufSize, CScreen& aScreen) const;

	TInt DebugInfoScreenElementSetL(TInt aFunction, TInt aParam, TInt aReplyBufSize,const CScreen& aScreen) const;

	TInt DebugInfoElementSetWindowL(TInt aFunction, TInt aParam, TInt aReplyBufSize,const CScreen& aScreen) const;

	TInt DebugInfoElementSetElementL(TInt aFunction, TInt aParam, TInt aReplyBufSize,const CScreen& aScreen) const;

	TInt DebugReturnConfig(TInt aReplyBufSize, MWsElement* aElement, TInt aFlags=0)const;

	TInt DebugReturnBase(TInt aReplyBufSize, const MWsElement* aElement) const;

	TInt DebugReturnFlags(TInt aReplyBufSize, const MWsElement* aElement, TInt aFlags=0) const;

	TInt DebugReturnRegion(TInt aReplyBufSize, const TRegion* aRegion, TInt aErrCodeIfEmpty) const;	

	// Misc

	void SetComputeMode(RWsSession::TComputeMode aComputeMode);

public:

	static TWsCmdHeaderBase iCurrentCommand;

private:

	class TWsCursorArrayItem

		{

	public:

		CWsSpriteBase* iCursor;

		TInt iIndex;

		};

	enum TInternalFlags

		{

		EIsInitialised = 0x01,

		EPanicClientAsSoonAsPossible = 0x02,		//The client should be panicked, but we have no way to panic him now

		EClientIsClosing = 0x04,		//The client is closing down, so the screen device may no longer be valid

		EFinishedProcessingCommands=0x08,	//Reached last command in command buffer or otherwised finihsed processing it

		ERemoveKeyCode=0x10,		//Remove the Win32 keycode emulator only

		ERetryDisplayEvent=0x20,

		EIsPerformingRedrawEvent=0x40,         //The client is performing a RedrawEvent

		EWgMsgQueueOverflow =0x80,

		};

private:

	RThread iClient;

	CScreen* iScreen;		//## This needs updating

	TUint iConnectionHandle; // Connection ID, only needed for logging, could bin this

	CEventQueue* iEventQueue;

	CRedrawQueue* iRedrawQueue;

	CPriorityKey* iPriorityKeyEvent;

	CWsGraphicMessageQueue iGraphicMessageQueue;

	RWsSession::TComputeMode iComputeMode;

	CWsObjectIx* iObjectIndex;

	DWsScreenDevice* iPrimaryScreenDevice;

	TWsCursorArrayItem iTempCustomTextCursor;

	mutable TInt iPanicReason;

	mutable TUint iInternalFlags;

	RMessage2 iClientMessage;

	RHandleBase* iResponseHandle;

	TInt iMessageIdSeq;

	//Members for procerssing command buffer

	static CWsClient* iCurrentClient;	// Client who's buffer is currently being processed

	static TInt iReply;					// Value to reply

	static TInt iReplyOffset;			// Offset into reply to write next block of data

	static TBuf8<EClientBufferMaxSize> iCmdBuf; // Buffer contain a block of client commands

	static CWsObject* iDestObj;			// Current object client command is for

	static const TUint8* iNextCmd;		// Pointer in buffer to the next command to be processed

	static TInt iDefaultSystemPointerCursorIndex;		// Negative when there isn't one

	static CWsPointerCursor* iDefaultSystemPointerCursor;

	static CArrayFixFlat<TWsCursorArrayItem>* iSystemPointerCursors;

	static CWsClient* iSystemPointerCursorListOwner;

	static CArrayFixFlat<TWsCursorArrayItem>* iTextCursorArray;

	static TUint iConnectionId;

	static TKeyArrayFix iCursorKey;

 	static TBool iDebug_EnforceRedrawCallingConvention;

#if defined(__WINS__)

public:

	inline TBool RemoveKeyCode();

#endif

	};

//

// inlines			//

//

inline const RThread& CWsClient::Client() const

	{return iClient;}

inline void CWsClient::EventReady(const RMessagePtr2& aEventMsg)

	{iEventQueue->EventReady(aEventMsg);}

inline void CWsClient::HandleClientRequestForEventData()

    {iEventQueue->GetData();}

inline void CWsClient::CancelClientRequestForEventData()

	{iEventQueue->CancelRead();}

inline void CWsClient::PurgePointerEvents()

	{iEventQueue->PurgePointerEvents();}

inline void CWsClient::RedrawEventReady(const RMessagePtr2& aEventMsg)

    {

    iInternalFlags&=~EIsPerformingRedrawEvent;

    iRedrawQueue->EventReady(aEventMsg);

    }

inline TBool CWsClient::ClientProcessingRedrawEvent()

	{return !!(iInternalFlags&EIsPerformingRedrawEvent);}

inline void CWsClient::HandleClientRequestForRedrawData()

    {

    iInternalFlags|=EIsPerformingRedrawEvent;

    iRedrawQueue->GetData();

    }

inline void CWsClient::CancelClientRequestForRedrawEvent()

	{iRedrawQueue->CancelRead();}

inline void CWsClient::PriorityKeyEventReady(const RMessagePtr2& aEventMsg)

    {iPriorityKeyEvent->EventReady(aEventMsg);}

inline void CWsClient::CancelClientRequestForPriorityKeyEvent()

	{iPriorityKeyEvent->CancelRead();}

inline void CWsClient::HandleClientRequestForPriorityKeyData()

	{iPriorityKeyEvent->GetData();}

inline void CWsClient::PriorityKeyPressed(TInt aHandle, const TKeyData &aKey, TInt aScanCode)

	{iPriorityKeyEvent->PriorityKey(aHandle,aKey,aScanCode);}

inline TInt CWsClient::ObjectHandle(const CWsObject* aThis) const

	{return(iObjectIndex->At(aThis));}

#if defined(__WINS__)

inline TBool CWsClient::RemoveKeyCode()

	{return iInternalFlags&ERemoveKeyCode;}

#endif

inline CEventQueue* CWsClient::EventQueue()

	{return(iEventQueue);}

inline const CEventQueue* CWsClient::EventQueue() const

	{return(iEventQueue);}

inline CRedrawQueue* CWsClient::RedrawQueue()

	{return(iRedrawQueue);}

inline const CRedrawQueue* CWsClient::RedrawQueue() const

	{return(iRedrawQueue);}

inline CWsObjectIx* CWsClient::ObjectIndex()

	{return(iObjectIndex);}

inline TInt CWsClient::ConnectionHandle() const

	{return(iConnectionHandle);}

inline DWsScreenDevice* CWsClient::PrimaryScreenDevice()

	{return(iPrimaryScreenDevice);}

inline const DWsScreenDevice* CWsClient::PrimaryScreenDevice() const

	{return(iPrimaryScreenDevice);}

inline void CWsClient::NotifyScreenDeviceDeleted(DWsScreenDevice* aDeletedScreenDevice)

	{

	if (iPrimaryScreenDevice == aDeletedScreenDevice)

		iPrimaryScreenDevice = NULL;

	}

inline CWsPointerCursor*& CWsClient::PointerCursor(TInt aIndex)

	{return (CWsPointerCursor*&)(*iSystemPointerCursors)[aIndex].iCursor;}

inline CWsCustomTextCursor*& CWsClient::TextCursor(TInt aIndex)

	{return (CWsCustomTextCursor*&)(*iTextCursorArray)[aIndex].iCursor;}

inline const RMessage2& CWsClient::ClientMessage() const

	{return iClientMessage;}

inline CScreen* CWsClient::Screen()

	{return iScreen;}

inline const CScreen* CWsClient::Screen() const

	{return iScreen;}

inline TBool CWsClient::NotClosing() const

	{return !(iInternalFlags&EClientIsClosing);}

inline CWsClient* CWsClient::CurrentClient()

	{return iCurrentClient;}

inline TBool CWsClient::CheckBuffer(TInt aLength, TInt aMaxLength)

	{return TBool((aLength>=0) && (aLength<=aMaxLength));}

inline TBool CWsClient::IsInitialised()

	{return iInternalFlags&EIsInitialised; }

inline void CWsClient::WgMsgQueueOverflow()

    {iInternalFlags |= EWgMsgQueueOverflow;}

#endif