/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


#ifndef _SANE_HXX
#define _SANE_HXX

#include <osl/thread.h>
#include <osl/module.h>
#include <tools/string.hxx>
#include <vcl/bitmap.hxx>
#include <sane/sane.h>
#include <scanner.hxx>

// ---------------------
// - BitmapTransporter -
// ---------------------

class BitmapTransporter : public OWeakObject, AWT::XBitmap
{
	SvMemoryStream						m_aStream;
	vos::OMutex							m_aProtector;
										
public:									
										
										BitmapTransporter();
	virtual								~BitmapTransporter();
										
										
	// XInterface						
	virtual ANY SAL_CALL				queryInterface( const Type & rType ) throw( RuntimeException );
    virtual void SAL_CALL				acquire() throw() { OWeakObject::acquire(); }
    virtual void SAL_CALL				release() throw() { OWeakObject::release(); }

	virtual AWT::Size SAL_CALL			getSize() throw();
	virtual SEQ( sal_Int8 ) SAL_CALL	getDIB() throw();
	virtual SEQ( sal_Int8 ) SAL_CALL	getMaskDIB() throw() { return SEQ( sal_Int8 )(); }

	// Misc
	void								lock() { m_aProtector.acquire(); }
	void								unlock() { m_aProtector.release(); }
	SvMemoryStream&						getStream() { return m_aStream; }
};

// --------
// - Sane -
// --------

class Sane
{
private:
	static int				nRefCount;
	static oslModule        pSaneLib;
	
	static SANE_Status		(*p_init)( SANE_Int*,
									   SANE_Auth_Callback );
	static void				(*p_exit)();
	static SANE_Status		(*p_get_devices)( const SANE_Device***,
											  SANE_Bool );
	static SANE_Status		(*p_open)( SANE_String_Const, SANE_Handle );
	static void				(*p_close)( SANE_Handle );
	static const SANE_Option_Descriptor* (*p_get_option_descriptor)(
		SANE_Handle, SANE_Int );
	static SANE_Status		(*p_control_option)( SANE_Handle, SANE_Int,
												 SANE_Action, void*,
												 SANE_Int* );
	static SANE_Status		(*p_get_parameters)( SANE_Handle,
												 SANE_Parameters* );
	static SANE_Status		(*p_start)( SANE_Handle );
	static SANE_Status		(*p_read)( SANE_Handle, SANE_Byte*, SANE_Int,
									   SANE_Int* );
	static void				(*p_cancel)( SANE_Handle );
	static SANE_Status		(*p_set_io_mode)( SANE_Handle, SANE_Bool );
	static SANE_Status		(*p_get_select_fd)( SANE_Handle, SANE_Int* );
	static SANE_String_Const (*p_strstatus)( SANE_Status );

	static SANE_Int				nVersion;
	static SANE_Device**		ppDevices;
	static int					nDevices;

	const SANE_Option_Descriptor**	mppOptions;
	int								mnOptions;
	int								mnDevice;
	SANE_Handle						maHandle;

	Link						maReloadOptionsLink;

	inline oslGenericFunction
                    LoadSymbol( const char* );
	void			Init();
	void			DeInit();

	SANE_Status ControlOption( int, SANE_Action, void* );

	sal_Bool CheckConsistency( const char*, sal_Bool bInit = sal_False );

public:
	Sane();
	~Sane();

	static sal_Bool			IsSane()
		{ return pSaneLib ? sal_True : sal_False; }
	sal_Bool			IsOpen()
		{ return maHandle ? sal_True : sal_False; }
	static int				CountDevices()
		{ return nDevices; }
	static String			GetName( int n )
		{ return String( ppDevices[n]->name ? ppDevices[n]->name : "", osl_getThreadTextEncoding() ); }
	static String			GetVendor( int n )
		{ return String( ppDevices[n]->vendor ? ppDevices[n]->vendor : "", osl_getThreadTextEncoding() ); }
	static String			GetModel( int n )
		{ return String( ppDevices[n]->model ? ppDevices[n]->model : "", osl_getThreadTextEncoding() ); }
	static String			GetType( int n )
		{ return String( ppDevices[n]->type ? ppDevices[n]->type : "", osl_getThreadTextEncoding() ); }

	String			GetOptionName( int n )
		{ return String( mppOptions[n]->name ? (char*)mppOptions[n]->name : "", osl_getThreadTextEncoding() ); }
	String			GetOptionTitle( int n )
		{ return String( mppOptions[n]->title ? (char*)mppOptions[n]->title : "", osl_getThreadTextEncoding() ); }
	SANE_Value_Type	GetOptionType( int n )
		{ return mppOptions[n]->type; }
	SANE_Unit		GetOptionUnit( int n )
		{ return mppOptions[n]->unit; }
	String			GetOptionUnitName( int n );
	SANE_Int		GetOptionCap( int n )
		{ return mppOptions[n]->cap; }
	SANE_Constraint_Type GetOptionConstraintType( int n )
		{ return mppOptions[n]->constraint_type; }
	const char**	GetStringConstraint( int n )
		{ return (const char**)mppOptions[n]->constraint.string_list; }
	int				GetRange( int, double*& );

	inline int		GetOptionElements( int n );
	int				GetOptionByName( const char* );
	sal_Bool			GetOptionValue( int, sal_Bool& );
	sal_Bool			GetOptionValue( int, ByteString& );
	sal_Bool			GetOptionValue( int, double&, int nElement = 0 );
	sal_Bool			GetOptionValue( int, double* );

	sal_Bool			SetOptionValue( int, sal_Bool );
	sal_Bool			SetOptionValue( int, const String& );
	sal_Bool			SetOptionValue( int, double, int nElement = 0 );
	sal_Bool			SetOptionValue( int, double* );

	sal_Bool			ActivateButtonOption( int );

	int				CountOptions() { return mnOptions; }
	int				GetDeviceNumber() { return mnDevice; }
	
	sal_Bool			Open( const char* );
	sal_Bool			Open( int );
	void			Close();
	void			ReloadDevices();
	void			ReloadOptions();

	sal_Bool			Start( BitmapTransporter& );

	inline Link		SetReloadOptionsHdl( const Link& rLink );
};

inline int Sane::GetOptionElements( int n )
{
	if( mppOptions[n]->type == SANE_TYPE_FIXED ||
		mppOptions[n]->type == SANE_TYPE_INT )
	{
		return mppOptions[n]->size/sizeof( SANE_Word );
	}
	return 1;
}

inline Link	Sane::SetReloadOptionsHdl( const Link& rLink )
{
	Link aRet = maReloadOptionsLink;
	maReloadOptionsLink = rLink;
	return aRet;
}

#endif