/*	$Id: textdisplay.c,v 1.4 2005/01/11 22:48:11 andreradke Exp $    */

/******************************************************************************

    UserLand Frontier(tm) -- High performance Web content management,
    object database, system-level and Internet scripting environment,
    including source code editing and debugging.

    Copyright (C) 1992-2004 UserLand Software, Inc.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

******************************************************************************/

#include "frontier.h"
#include "standard.h"

#include "quickdraw.h"
#include "font.h"
#include "smallicon.h"
#include "textdisplay.h"


#define horizinset 0
#define vertinset 0




void gettextdisplayinfo (Rect r, short fontnum, short fontsize, short fontstyle, tylinespacing spacing, short horizscrollunit, tytextdisplayinfo *info) {

	/*
	this is a central bottleneck -- anyone who wants to know where lines
	are, how big they are, how big the display is, etc, calls this 
	routine.  the displayinfo field of the outline record is filled.
	
	we establish the display size and the position for the first line
	of text, also the height of each line.
	
	we add a little extra space above each line to balance the space
	that's left when most characters don't descend.  makes the display
	look more balanced, but the coding is a little wierd...
	*/
	
	register short r1, r2, r3; /*registers that get re-used*/
	tytextdisplayinfo displayinfo;
	
	displayinfo.r = r;
	
	insetrect (&displayinfo.r, horizinset, vertinset);
	
	pushstyle (fontnum, fontsize, fontstyle);
	
	r1 = globalfontinfo.ascent + globalfontinfo.descent;
	
	r2 = globalfontinfo.descent;
	
	r3 = r1 + r2;
	
	switch (spacing) {
		
		case singlespaced:
			break;
		
		case oneandalittlespaced:
			r3 += 1; break;
	
		case oneandaquarterspaced:
			r3 += (r3 / 4); break;
			
		case oneandahalfspaced:
			r3 += (r3 / 2); break;
			
		case doublespaced:
			r3 *= 2; break;
			
		case triplespaced:
			r3 *= 3; break;
		
		} /*switch*/
	
	r3 = max (r3, heightsmallicon - 2); /*make sure it can handle an icon (almost)*/
		
	displayinfo.lh = r3;
	
	displayinfo.v = displayinfo.r.top + globalfontinfo.ascent + r2;
	
	displayinfo.h = displayinfo.r.left;
	
	r1 = displayinfo.r.bottom - displayinfo.r.top;
	
	displayinfo.screenlines = r1 / r3;
	
	r2 = r1 - (displayinfo.screenlines * r3); /*number of extra pixels*/
	
	r1 = r2 / 2; /*number of pixels added at top of display rectangle*/
	
	displayinfo.r.top += r1;
	
	displayinfo.v += r1;
	
	displayinfo.r.bottom -= r2 - r1; /*subtract the complementary number of pixels from bottom*/
	
	displayinfo.horizscrollpixels = horizscrollunit;
	
	popstyle ();
	
	*info = displayinfo;	
	} /*gettextdisplayinfo*/