/*---------------------------------------------------------*/
/*                                                         */
/*   PKE Demo program header      by D. Canright           */
/*                                                         */
/*---------------------------------------------------------*/

#include <iostream.h>
#include <strstrea.h>

#define Uses_TApplication
#define Uses_TCheckBoxes
#define Uses_TMenuBar
#define Uses_TStatusLine
#define Uses_TRect
#define Uses_TDialog
#define Uses_TInputLine
#define Uses_TLabel
#define Uses_TScroller
#define Uses_TScrollBar
#define Uses_TWindow
#define Uses_Boolean
#include <tv.h>

const int	MAXSIZE = 81;
const int	MAXSSIZE = 127;

const
	cmOpenKeyWin = 201,
	cmNewKeyWin  = 202,
	cmSaveKeyWin = 203,
	cmOpenMsgWin = 204,
	cmNewMsgWin  = 205,
	cmSaveMsgWin = 206,
	cmEncrMsgWin = 207,
	cmDecrMsgWin = 208,
	cmDbEnMsgWin = 209,
	cmDbDeMsgWin = 210,
	cmCopyKey    = 211,
	cmPastePriKey= 212,
	cmPastePubKey= 213,
	cmEncrFile   = 214,
	cmDecrFile   = 215,
	cmDbEnFile   = 216,
	cmDbDeFile   = 217,
	cmDoHelp     = 218,
	cmDoHelpMath = 219,
	cmDoHelpAbout= 220;


const int maxLineLength = maxViewWidth+1;
const int maxLines      = 500;

const int numWidth      =  8;
const int numLength     =  6;
const int msgWidth      = 36;
const int nameWidth     = 12;

const int unknownint = 0X8000;


class TNumIn: public TInputLine  // define a new window class
{

public:

	 TNumIn( const TRect& r, short aNumber = numLength );
	 virtual void handleEvent( TEvent& Event );
	 void setData( int z );
	 int getData();
};

class TInterior : public TScroller
{
	int lineCount;
	char *lines[maxLines];

public:

	 TInterior( const TRect& bounds, TScrollBar *aHScrollBar,
			  TScrollBar *aVScrollBar, const char *fileName ); // constructor
	 virtual ~TInterior();
	 virtual void draw();              // override TView::draw
	 void readFile( const char *fileName );
	 void deleteFile();
};

class THelpWindow : public TWindow   // define a new window class
{
public:

	 THelpWindow( const TRect& bounds, const char *aTitle,
			const char *fileName );
};

class PKEApp : public TApplication
{
	 THelpWindow *helpWin[3];
	 ushort kwinNum, mwinNum;

public:

	 PKEApp();
	 virtual ~PKEApp();

	 virtual void handleEvent( TEvent& Event );
	 static TMenuBar *initMenuBar( TRect );
	 static TStatusLine *initStatusLine( TRect );
	 virtual void outOfMemory();
	 void newMsgWin(const char *fileName);
	 void newKeyWin(const char *fileName);
	 void keyfileOpen();
	 void msgfileOpen();
	 void doSuspend();
	 void doResume();
	 void doHelp(int type, const char *aTitle, const char *fileName);
	 void encryptFile();
	 void decryptFile();
	 void dblencryptFile();
	 void dbldecryptFile();

	 int clipPriv, clipPub, clipMod;
};

class TKeyWindow : public TDialog      // define a new window class
{
	 int pub, priv, modulus;      // keys
	 TNumIn *publn, *privln, *modln;

public:
	 PKEApp *boss;

	 TKeyWindow( const TRect& bounds, const char *aTitle,
		PKEApp *theBoss );
	 virtual void handleEvent( TEvent& Event );
	 int readFile( const char *fileName );
	 void writeFile();
	 int generate();
private:
	 void writeKeys();
	 void clipKeys();
};

class TMsgWindow : public TDialog      // define a new window class
{
	 char msg[MAXSIZE], secret[MAXSSIZE];
	 TInputLine *msgln, *secretln;

public:
	 PKEApp *boss;

	 TMsgWindow( const TRect& bounds, const char *aTitle,
		PKEApp *theBoss );
	 virtual void handleEvent( TEvent& Event );
	 int readFile( const char *fileName );
	 void writeFile();
	 void encrypt();
	 void decrypt();
	 void dblencrypt();
	 void dbldecrypt();
private:
	 void getMsgs();
	 void putMsgs();
};

class TKeyDialog : public TDialog      // define a new window class
{
public:
	 PKEApp *boss;
	 TInputLine *keyin, *modin;

	 TKeyDialog( const char *aTitle, int theMod, PKEApp *theBoss );
	 virtual void handleEvent( TEvent& Event );
private:
	 int mod;
};

// for error messages:
	 extern char errorMsg[];
	 extern ostrstream errstr;
	 extern char buf[];	// all-purpose line buffer

ushort execDialog( TDialog *d, void *data );