Re: [NTG-context] displayed formula confuses parshape around figure

21 Sep 2006

      On Wed, 20 Sep 2006 14:36:33 +0100
Sanjoy Mahajan  wrote:
...
...
It works for me if put a \par or a empty line after the first
\input.
That's true, but doing so ends the paragraph.  Shouldn't the displayed
math be part of the paragraph?  The \input tufte's were just to make
the minimal example.  It came from a paragraph with text and math that
begins with a figure:
\placefigure[right,none]{}{\externalfigure[dummy]}
Then lots of text about the figure, leading up to 
\startformula
this equation
\stopformula
then more text discussing the equation...
-Sanjoy
Ok, I playes yesterday I bit with your example and can you give now
a solution for your problem.

\starttext

% This works

\hangindent4cm
\hangafter-3
\input tufte
$$
A = a^\alpha b^\beta,
$$
\input tufte

\blank[line]

% The group around the formula produces the error. I tried this also
% with plain TeX and I worked without problems. A ConTeXt bug.

\hangindent4cm
\hangafter-3
\input tufte
\bgroup
$$
A = a^\alpha b^\beta,
$$
\egroup
\input tufte

% Test if my path works also with intending

%\setupindenting[yes,medium]
%\setupformulas[indentnext=yes]

% Patch for startformula/s, look a hangindent and hangafter.

\unprotect

\def\dostopformula
  {\doplaceformulanumber
   \getvalue{\e!stop\formulaparameter\c!alternative\v!formula}%
   \resetlastlinewidth
   \nonoindentation
   \dochecknextindentation{\??fm\currentformula}%
   \egroup
   \hangafter\minusone   % added
   \hangindent\zeropoint % added
   \setfalse\handleformulanumber
   \dorechecknextindentation} % here ?

\def\startformulas#1\stopformulas % new / to be internationalized
  {\bgroup
   \forgetdisplayskips
   \startdisplaymath
   \setlocalhsize
   \long\def\startformula##1\stopformula{\advance\scratchcounter
\plusone}% \scratchcounter\zerocount #1% preroll
   \divide \hsize \scratchcounter
   \hbox to \localhsize \bgroup
     \hss
     \def\normalstartformula{\vskip-\strutdepth$$}% i hate this
     \def\normalstartformula{\vskip-\strutdepth$$}% i hate this
     \def\normalstopformula {$$}%
     \def\startformula{$\vcenter\bgroup\normalstartformula}%
     \def\stopformula {\normalstopformula\egroup$\hss}%
     #1%
     \egroup
   \stopdisplaymath
   \egroup
   \hangafter\minusone   % added
   \hangindent\zeropoint} % added

\protect

% No longer a problem, my patch works.

\hangindent4cm
\hangafter-3
\input tufte
\startformula
A = a^\alpha b^\beta,
\stopformula
\input tufte

\blank[line]

\hangindent4cm
\hangafter-3
\input tufte
\startformulas
\startformula
A = a^\alpha b^\beta,
\stopformula
\stopformulas
\input tufte

\stoptext

Wolfgang

Re: [NTG-context] displayed formula confuses parshape around figure

Wolfgang Schuster