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\NeedsTeXFormat{LaTeX2e}[1994/12/01]
\ProvidesPackage{inputtrc}[2010/11/11 v0.2a input tracing (UL)]
%% Copyright (C) 2010 Uwe Lueck,
%% http://www.contact-ednotes.sty.de.vu
%% -- author-maintained in the sense of LPPL below --
%%
%% This file can be redistributed and/or modified under
%% the terms of the LaTeX Project Public License; either
%% version 1.3c of the License, or any later version.
%% The latest version of this license is in
%% http://www.latex-project.org/lppl.txt
%% We did our best to help you, but there is NO WARRANTY.
%%
%% Please report bugs, problems, and suggestions via
%%
%% http://www.contact-ednotes.sty.de.vu
%%
%% === Core Definitions ===
%% Initializations of indent, current filename, and filename stack:
\gdef\IT@indent{\IT@indent@unit}
\xdef\IT@currfile{\jobname\space}
%% ... TODO: add `.tex' unless ...
\xdef\IT@filestack{\relax}
%% ... `\relax' saves braces around job file name
%% when the file stack is unbuilt.
%%
%% |\IT@prim@input{<file>}| will replace \LaTeX's \cs{@@input}
%% (at certain places, see below).
\newcommand*{\IT@prim@input}[1]{%
\typeout{\IT@indent\IT@currfile INPUTTING #1}%
%% ... TODO: option to write to `.log' only.
\xdef\IT@filestack{{\IT@currfile}\IT@filestack}%
\xdef\IT@currfile{#1}%
\expandafter \gdef\expandafter \IT@indent\expandafter{%
\IT@indent \IT@indent@unit}
\@@input#1
\expandafter\IT@pop@indent\IT@indent \@nil
\expandafter\IT@pop@file \IT@filestack\@nil
\IT@maybe@returnmessage %% v0.2
}
\def\IT@pop@indent#1#2\@nil{\gdef\IT@indent{#2}}
\def\IT@pop@file #1#2\@nil{%
\gdef\IT@currfile{#1}\gdef\IT@filestack{#2}}
%% ... cf. LaTeX's `\@pushfilename'/`\@popfilename'.
\newcommand*{\IT@the@returnmessage}{% %% v0.2
\typeout{\IT@indent RETURNING TO \IT@currfile}}
%% ... the ``active" version of `\IT@maybe@returnmessage',
%% see below ...
%%
%% === Changing \LaTeX\ (Preparations) ===
%%
%% Changing \LaTeX's `\@@input'
%% (that stores \TeX's primitive `\input')
%% is not easy
%% (cf. Didier Verna on his 'fink'
%% package,\footnote{\url{http://ctan.org/pkg/fink}}
%% also 'inputfile');
%% but it should suffice to change two of the three
%% %% <- `the two' was wrong 2010/10/08b ->
%% \LaTeX\ commands that use `\@@input':
\newcommand\IT@InputIfFileExists[2]{%
\IfFileExists{#1}%
{#2\@addtofilelist{#1}\IT@prim@input\@filef@und}}
%% ... \LaTeX's version is `\long', as opposed to `\@input':
\newcommand*{\IT@input}[1]{%
\IfFileExists{#1}{\IT@prim@input\@filef@und}%
{\typeout{No file #1.}}}
%% ... the third macro using `\@@input' is `\input'---too
%% difficult for now.
%%
%% Storing original \LaTeX:
\let\IT@ltx@InputIfFileExists\InputIfFileExists
\let\IT@ltx@input\@input
%%
%% === The User Commands ===
%% |\dotracinginputs| globally activates input tracing:
\newcommand*{\dotracinginputs}{%
\global \let \InputIfFileExists \IT@InputIfFileExists
\global \let \@input \IT@input}
%% |\notracinginputs| globally turns input tracing off:
\newcommand*{\notracinginputs}{%
\global \let \InputIfFileExists \IT@ltx@InputIfFileExists
\global \let \@input \IT@ltx@input}
%% |\setinputindentunit{<cmds>}| globally sets the ``indent unit"---the
%% default setting is <cmds>~= `\space\space':
\newcommand*{\setinputindentunit}{\gdef\IT@indent@unit}
\setinputindentunit{\space\space}
%% |\dotracingreturns| activates the \texttt{RETURNING~TO} message---
\newcommand*{\dotracingreturns}{%
\global \let \IT@maybe@returnmessage \IT@the@returnmessage}
%% ---|\notracingreturns| turns it off---
\newcommand*{\notracingreturns}{%
\global \let \IT@maybe@returnmessage \IT@the@returnmessage}
%% ---\emph{not} activated is the default:
\notracingreturns
%% |\dotracinginputsreturns| activates \emph{both} `INPUTTING' and
%% `RETURNING' messages:
\newcommand*{\dotracinginputsreturns}{%
\dotracinginputs \dotracingreturns}
%%
\endinput
%%
%% == Coda ==
%% You can't overestimate my pride!
%% \emph{That's one small step for a man---one giant leap for \TeX kind.}
%%
%% On the other hand, I probably exhausted the set of possible
%% trials and errors (becoming euphoric when it suddenly worked).
%%
%% \bigskip \noindent \itshape
%% Dedicated to Koppa Aleph Rio Lord.
%%
%% \bigskip \raggedleft
%% Worms-Pfeddersheim~2010/10/08,~U.~L.
HISTORY
v0.1 2010/10/08 very first, installed on CTAN same day
v0.1a 2010/10/08 doc corrected: LaTeX commands using \@@input;
manual page breaks -- installed on CTAN 2010/10/09
v0.2 2010/10/09 \IT@maybe@returnmessage etc.
v0.2a 2010/11/11 updated LPPL version
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