Re: Vertical alignment of formulas

[Hans Hagen <pragma@wxs.nl>]

At 19:24 17/09/2003 +0200, you wrote:
>Hi
>
> > one complication is that the last line width is not available outside math
> > mode (which is a pain)
>
>If really needed one can use quite old plain macro which try to soften this
>pain... However for short
>paragraphs it needs some changes (\prevgraf can't be less then zero). Meybe
>this is not very nice but...
>
>\newif\ifmeasdisp \measdispfalse
>\newcount\lineno
>\newdimen\linesize
>\def\measline{\ifhmode
>               \bgroup
>               \parfillskip=0pt plus 1fil
>               \predisplaypenalty=10000
>               \postdisplaypenalty=10000
>               \displaywidowpenalty=\widowpenalty
>               \abovedisplayskip=-\baselineskip
>               \belowdisplayskip=-\baselineskip
>               \abovedisplayshortskip=-\baselineskip
>               \belowdisplayshortskip=-\baselineskip
>               $$\global\linesize=\predisplaysize$$
>               \global\advance\linesize by -2em
>               \global\lineno=\prevgraf
>               \global\advance\lineno by -3
>               \ifmeasdisp\immediate\write16{>>\the\lineno: \the\linesize}\fi
>               \global\advance\lineno by -1
>               \global\prevgraf=\lineno
>               \kern\linesize
>               \egroup
>               \else
>               \immediate\write16{! I'M IN VMODE---MEASURING IGNORED}%
>               \fi}
>% ------------------------------------------------------------------------
>% Author: B. Jackowski, 22 V 1990.
>% ------------------------------------------------------------------------

this 'using a fake formula' is more or less the way i determine the last 
line length, but keep in mind that this only works in situations like:

   some text \measline

and not in

   some text \par (or empty line) \measline

Hans

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                                   Hans Hagen | PRAGMA ADE | pragma@wxs.nl
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