[pstricks] [Problem] Spurious blank introduced by \pst at newnode in some special circumstances

[Denis Girou]

  Dominique Rodriguez <dominique.rodriguez at waika9.com> reported (some time
ago) a problem that was already encountered but without I truly understanded it
(it arrive only in some "special" circumstances). But working on the example
he sent me, I could diagnosed the problem and correct it, introducing a
\pst at killglue macro inside the \pst at newnode one.

  * 00/11/09 pst-node.tex (97 patch 11): The \pst at newnode macro can introduce
a spurious blank in some special circumstances. I add a \pst at killglue macro
to solve the problem.
(reported by Dominique Rodriguez <dominique.rodriguez at waika9.com>)

  Here was the test case I built from his example:

\documentclass[12pt,a4paper]{article}

\usepackage{pst-node}

\psset{subgriddiv=0,griddots=5}

\SpecialCoor

\newcommand{\Test}{%
\begin{pspicture}(4,4)\psgrid
  \pnode(1,1){A}\rput(A){$\bullet$}
  \pnode(2,2){B}\rput(B){$\bullet$}
  \pnode(3,3){C}\rput(C){$\bullet$}
\end{pspicture}
%
\hfill
\def\MyNode(##1,##2)##3{\pnode(##1,##2){##3}\rput(##3){$\bullet$}}%
\begin{pspicture}(4,4)\psgrid
  \MyNode(1,1){A}
  \MyNode(2,2){B}
  \MyNode(3,3){C}
\end{pspicture}
\hfill
%
\def\MyNode(##1,##2)##3{{\pnode(##1,##2){##3}\rput(##3){$\bullet$}}}%
\begin{pspicture}(4,4)\psgrid
  \MyNode(1,1){A}
  \MyNode(2,2){B}
  \MyNode(3,3){C}
\end{pspicture}
\vspace{2cm}}

\pagestyle{empty}

\begin{document}

\Test

\makeatletter

\def\pst at newnode#1#2#3#4{%
% DG/SR modification begin - Nov.  9, 2000 - Patch 11
\pst at killglue
% DG/SR modification end
\leavevmode
\pst at getnode{#1}\pst at thenode
\pst at Verb{%
\pst at nodedict
{#3}
\ifx\psk at name\relax false \else \psk at name true \fi
\pst at thenode
#2
{#4}
\tx at NewNode
end}%
\global\let\psk at name\relax
\pstree at nodehook
\global\let\pstree at nodehook\relax}

\makeatother

\Test

\end{document}


  Thanks to Dominique Rodriguez for his report.

D.G.