/*  GadTools layout toolkit
**
**  Copyright © 1993-1995 by Olaf `Olsen' Barthel
**  Freely distributable.
*/

#include "gtlayout_global.h"

LONG LIBENT
LT_LabelWidth(REG(a0) LayoutHandle *handle,REG(a1) STRPTR label)
{
	if(handle)
	{
		struct RastPort	*rp = &handle -> RPort;
		LONG	start;
		LONG	len;
		LONG	cnt;
		LONG	width,maxWidth;
		LONG	underscore;

		start = 0;
		maxWidth = 0;
		underscore = 0;

		cnt = 0;
		len = 0;

		while(label[len])
		{
			if(label[len] == '_')
			{
				if(!underscore)
					underscore = TextLength(rp,"_",1);

				cnt += underscore;
			}

			if(label[len] == '\n')
			{
				if(len > start)
					width = TextLength(rp,&label[start],len - start) - cnt;
				else
					width = 0;

				cnt = 0;
				start = len + 1;

				if(width > maxWidth)
					maxWidth = width;
			}

			len++;
		}

		if(len > start)
			width = TextLength(rp,&label[start],len - start) - cnt;
		else
			width = 0;

		if(width > maxWidth)
			maxWidth = width;

		return(maxWidth);
	}
	else
		return(0);
}


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


LONG LIBENT
LT_LabelChars(REG(a0) LayoutHandle *handle,REG(a1) STRPTR label)
{
	if(handle)
		return((LT_LabelWidth(handle,label) + handle -> GlyphWidth - 1) / handle -> GlyphWidth);
	else
		return(0);
}