// WL_TEXT.C

#include "WL_DEF.H"
#pragma	hdrstop

/*
=============================================================================

TEXT FORMATTING COMMANDS
------------------------
^C  			Change text color
^E[enter]				End of layout (all pages)
^G,,[enter]	Draw a graphic and push margins
^P[enter]				start new page, must be the first chars in a layout
^L,[ENTER]		Locate to a specific spot, x in pixels, y in lines

=============================================================================
*/

/*
=============================================================================

						 LOCAL CONSTANTS

=============================================================================
*/

#define BACKCOLOR		0x11


#define WORDLIMIT		80
#define FONTHEIGHT		10
#define	TOPMARGIN		16
#define BOTTOMMARGIN	32
#define LEFTMARGIN		16
#define RIGHTMARGIN		16
#define PICMARGIN		8
#define TEXTROWS		((200-TOPMARGIN-BOTTOMMARGIN)/FONTHEIGHT)
#define	SPACEWIDTH		7
#define SCREENPIXWIDTH	320
#define SCREENMID		(SCREENPIXWIDTH/2)

/*
=============================================================================

						 LOCAL VARIABLES

=============================================================================
*/

int			pagenum,numpages;

unsigned	leftmargin[TEXTROWS],rightmargin[TEXTROWS];
char		far *text;
unsigned	rowon;

int			picx,picy,picnum,picdelay;
boolean		layoutdone;

//===========================================================================

#ifndef JAPAN
/*
=====================
=
= RipToEOL
=
=====================
*/

void RipToEOL (void)
{
	while (*text++ != '\n')		// scan to end of line
	;
}


/*
=====================
=
= ParseNumber
=
=====================
*/

int	ParseNumber (void)
{
	char	ch;
	char	num[80],*numptr;

//
// scan until a number is found
//
	ch = *text;
	while (ch < '0' || ch >'9')
		ch = *++text;

//
// copy the number out
//
	numptr = num;
	do
	{
		*numptr++ = ch;
		ch = *++text;
	} while (ch >= '0' && ch <= '9');
	*numptr = 0;

	return atoi (num);
}



/*
=====================
=
= ParsePicCommand
=
= Call with text pointing just after a ^P
= Upon exit text points to the start of next line
=
=====================
*/

void	ParsePicCommand (void)
{
	picy=ParseNumber();
	picx=ParseNumber();
	picnum=ParseNumber();
	RipToEOL ();
}


void	ParseTimedCommand (void)
{
	picy=ParseNumber();
	picx=ParseNumber();
	picnum=ParseNumber();
	picdelay=ParseNumber();
	RipToEOL ();
}


/*
=====================
=
= TimedPicCommand
=
= Call with text pointing just after a ^P
= Upon exit text points to the start of next line
=
=====================
*/

void	TimedPicCommand (void)
{
	ParseTimedCommand ();

//
// update the screen, and wait for time delay
//
	VW_UpdateScreen ();

//
// wait for time
//
	TimeCount = 0;
	while (TimeCount < picdelay)
	;

//
// draw pic
//
	VWB_DrawPic (picx&~7,picy,picnum);
}


/*
=====================
=
= HandleCommand
=
=====================
*/

void HandleCommand (void)
{
	int	i,margin,top,bottom;
	int	picwidth,picheight,picmid;

	switch (toupper(*++text))
	{
	case 'B':
		picy=ParseNumber();
		picx=ParseNumber();
		picwidth=ParseNumber();
		picheight=ParseNumber();
		VWB_Bar(picx,picy,picwidth,picheight,BACKCOLOR);
		RipToEOL();
		break;
	case ';':		// comment
		RipToEOL();
		break;
	case 'P':		// ^P is start of next page, ^E is end of file
	case 'E':
		layoutdone = true;
		text--;    	// back up to the '^'
		break;

	case 'C':		// ^c changes text color
		i = toupper(*++text);
		if (i>='0' && i<='9')
			fontcolor = i-'0';
		else if (i>='A' && i<='F')
			fontcolor = i-'A'+10;

		fontcolor *= 16;
		i = toupper(*++text);
		if (i>='0' && i<='9')
			fontcolor += i-'0';
		else if (i>='A' && i<='F')
			fontcolor += i-'A'+10;
		text++;
		break;

	case '>':
		px = 160;
		text++;
		break;

	case 'L':
		py=ParseNumber();
		rowon = (py-TOPMARGIN)/FONTHEIGHT;
		py = TOPMARGIN+rowon*FONTHEIGHT;
		px=ParseNumber();
		while (*text++ != '\n')		// scan to end of line
		;
		break;

	case 'T':		// ^Tyyy,xxx,ppp,ttt waits ttt tics, then draws pic
		TimedPicCommand ();
		break;

	case 'G':		// ^Gyyy,xxx,ppp draws graphic
		ParsePicCommand ();
		VWB_DrawPic (picx&~7,picy,picnum);
		picwidth = pictable[picnum-STARTPICS].width;
		picheight = pictable[picnum-STARTPICS].height;
		//
		// adjust margins
		//
		picmid = picx + picwidth/2;
		if (picmid > SCREENMID)
			margin = picx-PICMARGIN;			// new right margin
		else
			margin = picx+picwidth+PICMARGIN;	// new left margin

		top = (picy-TOPMARGIN)/FONTHEIGHT;
		if (top<0)
			top = 0;
		bottom = (picy+picheight-TOPMARGIN)/FONTHEIGHT;
		if (bottom>=TEXTROWS)
			bottom = TEXTROWS-1;

		for (i=top;i<=bottom;i++)
			if (picmid > SCREENMID)
				rightmargin[i] = margin;
			else
				leftmargin[i] = margin;

		//
		// adjust this line if needed
		//
		if (px < leftmargin[rowon])
			px = leftmargin[rowon];
		break;
	}
}


/*
=====================
=
= NewLine
=
=====================
*/

void NewLine (void)
{
	char	ch;

	if (++rowon == TEXTROWS)
	{
	//
	// overflowed the page, so skip until next page break
	//
		layoutdone = true;
		do
		{
			if (*text == '^')
			{
				ch = toupper(*(text+1));
				if (ch == 'E' || ch == 'P')
				{
					layoutdone = true;
					return;
				}
			}
			text++;

		} while (1);

	}
	px = leftmargin[rowon];
	py+= FONTHEIGHT;
}



/*
=====================
=
= HandleCtrls
=
=====================
*/

void HandleCtrls (void)
{
	char	ch;

	ch = *text++;			// get the character and advance

	if (ch == '\n')
	{
		NewLine ();
		return;
	}

}


/*
=====================
=
= HandleWord
=
=====================
*/

void HandleWord (void)
{
	char		word[WORDLIMIT];
	int			i,wordindex;
	unsigned	wwidth,wheight,newpos;


	//
	// copy the next word into [word]
	//
	word[0] = *text++;
	wordindex = 1;
	while (*text>32)
	{
		word[wordindex] = *text++;
		if (++wordindex == WORDLIMIT)
			Quit ("PageLayout: Word limit exceeded");
	}
	word[wordindex] = 0;		// stick a null at end for C

	//
	// see if it fits on this line
	//
	VW_MeasurePropString (word,&wwidth,&wheight);

	while (px+wwidth > rightmargin[rowon])
	{
		NewLine ();
		if (layoutdone)
			return;		// overflowed page
	}

	//
	// print it
	//
	newpos = px+wwidth;
	VWB_DrawPropString (word);
	px = newpos;

	//
	// suck up any extra spaces
	//
	while (*text == ' ')
	{
		px += SPACEWIDTH;
		text++;
	}
}

/*
=====================
=
= PageLayout
=
= Clears the screen, draws the pics on the page, and word wraps the text.
= Returns a pointer to the terminating command
=
=====================
*/

void PageLayout (boolean shownumber)
{
	int		i,oldfontcolor;
	char	ch;

	oldfontcolor = fontcolor;

	fontcolor = 0;

//
// clear the screen
//
	VWB_Bar (0,0,320,200,BACKCOLOR);
	VWB_DrawPic (0,0,H_TOPWINDOWPIC);
	VWB_DrawPic (0,8,H_LEFTWINDOWPIC);
	VWB_DrawPic (312,8,H_RIGHTWINDOWPIC);
	VWB_DrawPic (8,176,H_BOTTOMINFOPIC);


	for (i=0;i1)
			{
				#ifndef JAPAN
				BackPage ();
				BackPage ();
				#else
				pagenum--;
				#endif
				newpage = true;
			}
			break;

		case sc_Enter:
		case sc_DownArrow:
		case sc_PgDn:
		case sc_RightArrow:		// the text allready points at next page
			if (pagenum