summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/source/latex/oberdiek/ifvtex.dtx
blob: 38dd4727db3bfd3bab876804e0280a5accbfbbaf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
% \iffalse meta-comment
%
% Copyright (C) 2001, 2006 by Heiko Oberdiek <oberdiek@uni-freiburg.de>
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either
% version 1.3 of this license or (at your option) any later
% version. The latest version of this license is in
%    http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of
% LaTeX version 2005/12/01 or later.
%
% This work has the LPPL maintenance status "maintained".
%
% This Current Maintainer of this work is Heiko Oberdiek.
%
% This work consists of the main source file ifvtex.dtx
% and the derived files
%    ifvtex.sty, ifvtex.pdf, ifvtex.ins, ifvtex.drv.
%
% Distribution:
%    CTAN:macros/latex/contrib/oberdiek/ifvtex.dtx
%    CTAN:macros/latex/contrib/oberdiek/ifvtex.pdf
%
% Unpacking:
%    (a) If ifvtex.ins is present:
%           tex ifvtex.ins
%    (b) Without ifvtex.ins:
%           tex ifvtex.dtx
%    (c) If you insist on using LaTeX
%           latex \let\install=y\input{ifvtex.dtx}
%        (quote the arguments according to the demands of your shell)
%
% Documentation:
%    (a) If ifvtex.drv is present:
%           latex ifvtex.drv
%    (b) Without ifvtex.drv:
%           latex ifvtex.dtx; ...
%    The class ltxdoc loads the configuration file ltxdoc.cfg
%    if available. Here you can specify further options, e.g.
%    use A4 as paper format:
%       \PassOptionsToClass{a4paper}{article}
%
%    Programm calls to get the documentation (example):
%       pdflatex ifvtex.dtx
%       makeindex -s gind.ist ifvtex.idx
%       pdflatex ifvtex.dtx
%       makeindex -s gind.ist ifvtex.idx
%       pdflatex ifvtex.dtx
%
% Installation:
%    TDS:tex/generic/oberdiek/ifvtex.sty
%    TDS:doc/latex/oberdiek/ifvtex.pdf
%    TDS:source/latex/oberdiek/ifvtex.dtx
%
%<*ignore>
\begingroup
  \def\x{LaTeX2e}
\expandafter\endgroup
\ifcase 0\ifx\install y1\fi\expandafter
         \ifx\csname processbatchFile\endcsname\relax\else1\fi
         \ifx\fmtname\x\else 1\fi\relax
\else\csname fi\endcsname
%</ignore>
%<*install>
\input docstrip.tex
\Msg{************************************************************************}
\Msg{* Installation}
\Msg{* Package: ifvtex 2006/02/20 v1.1 Provides the ifpdf switch (HO)}
\Msg{************************************************************************}

\keepsilent
\askforoverwritefalse

\preamble

This is a generated file.

Copyright (C) 2001, 2006 by Heiko Oberdiek <oberdiek@uni-freiburg.de>

This work may be distributed and/or modified under the
conditions of the LaTeX Project Public License, either
version 1.3 of this license or (at your option) any later
version. The latest version of this license is in
   http://www.latex-project.org/lppl.txt
and version 1.3 or later is part of all distributions of
LaTeX version 2005/12/01 or later.

This work has the LPPL maintenance status "maintained".

This Current Maintainer of this work is Heiko Oberdiek.

This work consists of the main source file ifvtex.dtx
and the derived files
   ifvtex.sty, ifvtex.pdf, ifvtex.ins, ifvtex.drv.

\endpreamble

\generate{%
  \file{ifvtex.ins}{\from{ifvtex.dtx}{install}}%
  \file{ifvtex.drv}{\from{ifvtex.dtx}{driver}}%
  \usedir{tex/generic/oberdiek}%
  \file{ifvtex.sty}{\from{ifvtex.dtx}{package}}%
}

\obeyspaces
\Msg{************************************************************************}
\Msg{*}
\Msg{* To finish the installation you have to move the following}
\Msg{* file into a directory searched by TeX:}
\Msg{*}
\Msg{*     ifvtex.sty}
\Msg{*}
\Msg{* To produce the documentation run the file `ifvtex.drv'}
\Msg{* through LaTeX.}
\Msg{*}
\Msg{* Happy TeXing!}
\Msg{*}
\Msg{************************************************************************}

\endbatchfile
%</install>
%<*ignore>
\fi
%</ignore>
%<*driver>
\NeedsTeXFormat{LaTeX2e}
\ProvidesFile{ifvtex.drv}%
  [2006/02/20 v1.1 Provides the ifpdf switch (HO)]
\documentclass{ltxdoc}
\usepackage{holtxdoc}
\begin{document}
  \DocInput{ifvtex.dtx}
\end{document}
%</driver>
% \fi
%
% \CheckSum{224}
%
% \CharacterTable
%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%   Digits        \0\1\2\3\4\5\6\7\8\9
%   Exclamation   \!     Double quote  \"     Hash (number) \#
%   Dollar        \$     Percent       \%     Ampersand     \&
%   Acute accent  \'     Left paren    \(     Right paren   \)
%   Asterisk      \*     Plus          \+     Comma         \,
%   Minus         \-     Point         \.     Solidus       \/
%   Colon         \:     Semicolon     \;     Less than     \<
%   Equals        \=     Greater than  \>     Question mark \?
%   Commercial at \@     Left bracket  \[     Backslash     \\
%   Right bracket \]     Circumflex    \^     Underscore    \_
%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%   Right brace   \}     Tilde         \~}
%
% \GetFileInfo{ifvtex.drv}
%
% \title{The \xpackage{ifvtex} package}
% \date{2006/02/20 v1.1}
% \author{Heiko Oberdiek\\\xemail{oberdiek@uni-freiburg.de}}
%
% \maketitle
%
% \begin{abstract}
% This package looks for \VTeX, implements
% and sets the switches \cs{ifvtex}, \cs{ifvtex}\texttt{\meta{mode}},
% \cs{ifvtexgex}. It works with plain or \LaTeX\ formats.
% \end{abstract}
%
% \tableofcontents
%
% \section{Usage}
%
% The package \xpackage{ifvtex} can be used with both \plainTeX\
% and \LaTeX:
% \begin{description}
% \item[\plainTeX:] |\input ifvtex.sty|
% \item[\LaTeXe:]   |\usepackage{ifvtex}|\\
% \end{description}
%
% The package implements switches for \VTeX\ and its different
% modes and interprets \cs{VTeXversion}, \cs{OpMode}, and \cs{gexmode}.
%
% \begin{declcs}{ifvtex}
% \end{declcs}
% The package provides the switch \cs{ifvtex}:
% \begin{quote}
%   |\ifvtex|\\
%   \hspace{1.5em}\dots\ do things, if \VTeX\ is running \dots\\
%   |\else|\\
%   \hspace{1.5em}\dots\ other \TeX\ compiler \dots\\
%   |\fi|
% \end{quote}
% Users of the package \xpackage{ifthen} can use the switch as boolean:
% \begin{quote}
%   |\boolean{ifvtex}|
% \end{quote}
%
% \begin{declcs}{ifvtexdvi}\\
%   \cs{ifvtexpdf}\SpecialUsageIndex{\ifvtexpdf}\\
%   \cs{ifvtexps}\SpecialUsageIndex{\ifvtexps}\\
%   \cs{ifvtexhtml}\SpecialUsageIndex{\ifvtexhtml}
% \end{declcs}
% \VTeX\ knows different output modes that can be asked by these
% switches.
%
% \begin{declcs}{ifvtexgex}
% \end{declcs}
% This switch shows, whether GeX is available.
%
% \StopEventually{
% }
%
% \section{Implemenation}
%
% \subsection{Reload check and package identification}
%
%    \begin{macrocode}
%<*package>
%    \end{macrocode}
%    Reload check, especially if the package is not used with \LaTeX.
%    \begin{macrocode}
\begingroup
  \expandafter\let\expandafter\x\csname ver@ifvtex.sty\endcsname
  \ifcase 0%
    \ifx\x\relax % plain
    \else
      \ifx\x\empty % LaTeX
      \else
        1%
      \fi
    \fi
  \else
    \expandafter\ifx\csname PackageInfo\endcsname\relax
      \def\x#1#2{%
        \immediate\write-1{Package #1 Info: #2.}%
      }%
    \else
      \def\x#1#2{\PackageInfo{#1}{#2, stopped}}%
    \fi
    \x{ifvtex}{The package is already loaded}%
    \endgroup
    \expandafter\endinput
  \fi
\endgroup
%    \end{macrocode}
%    Package identification:
%    \begin{macrocode}
\begingroup
  \expandafter\ifx\csname ProvidesPackage\endcsname\relax
    \def\x#1#2#3[#4]{\endgroup
      \immediate\write-1{Package: #3 #4}%
      \xdef#1{#4}%
    }%
  \else
    \def\x#1#2[#3]{\endgroup
      #2[{#3}]%
      \ifx#1\relax
        \xdef#1{#3}%
      \fi
    }%
  \fi
\expandafter\x\csname ver@ifvtex.sty\endcsname
\ProvidesPackage{ifvtex}%
  [2006/02/20 v1.1 Provides the ifpdf switch (HO)]
%    \end{macrocode}
%
%
% \subsection{Check for previously defined \cs{ifvtex}}
%
%    \begin{macrocode}
\begingroup
  \expandafter\ifx\csname ifvtex\endcsname\relax
  \else
    \edef\i/{\expandafter\string\csname ifvtex\endcsname}%
    \expandafter\ifx\csname PackageError\endcsname\relax
      \def\x#1#2{%
        \edef\z{#2}%
        \expandafter\errhelp\expandafter{\z}%
        \errmessage{Package ifvtex Error: #1}%
      }%
      \def\y{^^J}%
      \newlinechar=10
    \else
      \def\x#1#2{%
        \PackageError{ifvtex}{#1}{#2}%
      }%
      \def\y{\MessageBreak}%
    \fi
    \x{Name clash, \i/ is already defined}{%
      Incompatible versions of \i/ can cause problems,\y
      therefore package loading is aborted.%
    }%
    \endgroup
    \expandafter\endinput
  \fi
\endgroup
%    \end{macrocode}
%
% \subsection{\cs{ifvtex}}
%
%    \begin{macro}{\ifvtex}
%    Create and set the switch. \cs{newif} initializes the
%    switch with \cs{iffalse}.
%    \begin{macrocode}
\newif\ifvtex
%    \end{macrocode}
%    \begin{macrocode}
\begingroup\expandafter\expandafter\expandafter\endgroup
\expandafter\ifx\csname VTeXversion\endcsname\relax
\else
  \begingroup\expandafter\expandafter\expandafter\endgroup
  \expandafter\ifx\csname OpMOde\endcsname\relax
  \else
    \vtextrue
  \fi
\fi
%    \end{macrocode}
%    \end{macro}
%
% \subsection{Mode and GeX switches}
%
%    \begin{macrocode}
\newif\ifvtexdvi
\newif\ifvtexpdf
\newif\ifvtexps
\newif\ifvtexhtml
\newif\ifvtexgex
\ifvtex
  \ifcase\OpMode\relax
    \vtexdvitrue
  \or % 1
    \vtexpdftrue
  \or % 2
    \vtexpstrue
  \or % 3
    \vtexpstrue
  \or\or\or\or\or\or\or % 10
    \vtexhtmltrue
  \fi
  \begingroup\expandafter\expandafter\expandafter\endgroup
  \expandafter\ifx\csname gexmode\endcsname\relax
  \else
    \ifnum\gexmode>0 %
      \vtexgextrue
    \fi
  \fi
\fi
%    \end{macrocode}
%
% \subsection{Protocol entry}
%
%     Log comment:
%    \begin{macrocode}
\begingroup
  \expandafter\ifx\csname PackageInfo\endcsname\relax
    \def\x#1#2{%
      \immediate\write-1{Package #1 Info: #2.}%
    }%
  \else
    \let\x\PackageInfo
    \expandafter\let\csname on@line\endcsname\empty
  \fi
  \x{ifvtex}{%
    VTeX %
    \ifvtex
      in \ifvtexdvi DVI\fi
         \ifvtexpdf PDF\fi
         \ifvtexps PS\fi
         \ifvtexhtml HTML\fi
      \space mode %
      with\ifvtexgex\else out\fi\space GeX %
    \else
      not %
    \fi
    detected%
  }%
\endgroup
%    \end{macrocode}
%
%    \begin{macrocode}
%</package>
%    \end{macrocode}
% \section{Installation}
%
% \paragraph{CTAN.} This package is available on
% CTAN\footnote{\url{ftp://ftp.ctan.org/tex-archive/}}:
% \begin{description}
% \item[\CTAN{macros/latex/contrib/oberdiek/ifvtex.dtx}] The source file.
% \item[\CTAN{macros/latex/contrib/oberdiek/ifvtex.pdf}] Documentation.
% \end{description}
%
% \paragraph{Unpacking.} The \xfile{.dtx} file is a self-extracting
% \docstrip\ archive. The files are extracted by running the
% \xfile{.dtx} through \plainTeX:
% \begin{quote}
%   \verb|tex ifvtex.dtx|
% \end{quote}
%
% \paragraph{TDS.} Now the different files must be moved into
% the different directories in your installation TDS tree
% (also known as \xfile{texmf} tree):
% \begin{quote}
% \sbox0{^^A
% \begin{tabular}{@{}>{\ttfamily}l@{$\quad\rightarrow\quad$}>{\ttfamily}l@{}}
%   ifvtex.sty & tex/generic/oberdiek/ifvtex.sty\\
%   ifvtex.pdf & doc/latex/oberdiek/ifvtex.pdf\\
%   ifvtex.dtx & source/latex/oberdiek/ifvtex.dtx\\
% \end{tabular}^^A
% }%
% \ifdim\wd0>\linewidth
%   \mbox{}\nobreak\hskip0pt minus\leftmargin
%   \usebox0
%   \nobreak\hskip0pt minus\rightmargin
% \else
%   \usebox0
% \fi
% \end{quote}
% If you have a \xfile{docstrip.cfg} that configures and enables \docstrip's
% TDS installing feature, then some files can already be in the right
% place, see the documentation of \docstrip.
%
% \paragraph{Refresh file databases.} If your \TeX~distribution
% (\teTeX, \mikTeX, \dots) rely on file databases, you must refresh
% these. For example, \teTeX\ users run \verb|texhash| or
% \verb|mktexlsr|.
%
% \subsection{Some details for the interested}
%
% \paragraph{Attached source.}
%
% The PDF documentation on CTAN also includes the
% \xfile{.dtx} source file. It can be extracted by
% AcrobatReader 6 or higher. Another option is \textsf{pdftk},
% e.g. unpack the file into the current directory:
% \begin{quote}
%   \verb|pdftk ifvtex.pdf unpack_files output .|
% \end{quote}
%
% \paragraph{Unpacking with \LaTeX.}
% The \xfile{.dtx} chooses its action depending on the format:
% \begin{description}
% \item[\plainTeX:] Run \docstrip\ and extract the files.
% \item[\LaTeX:] Generate the documentation.
% \end{description}
% If you insist on using \LaTeX\ for \docstrip\ (really,
% \docstrip\ does not need \LaTeX), then inform the autodetect routine
% about your intention:
% \begin{quote}
%   \verb|latex \let\install=y\input{ifvtex.dtx}|
% \end{quote}
% Do not forget to quote the argument according to the demands
% of your shell.
%
% \paragraph{Generating the documentation.}
% You can use both the \xfile{.dtx} or the \xfile{.drv} to generate
% the documentation. The process can be configured by the
% configuration file \xfile{ltxdoc.cfg}. For instance, put this
% line into this file, if you want to have A4 as paper format:
% \begin{quote}
%   \verb|\PassOptionsToClass{a4paper}{article}|
% \end{quote}
% An example follows how to generate the
% documentation with pdf\LaTeX:
% \begin{quote}
%\begin{verbatim}
%pdflatex ifvtex.dtx
%makeindex -s gind.ist ifvtex.idx
%pdflatex ifvtex.dtx
%makeindex -s gind.ist ifvtex.idx
%pdflatex ifvtex.dtx
%\end{verbatim}
% \end{quote}
%
% \begin{History}
%   \begin{Version}{2001/09/26 v1.0}
%   \item
%     First public version.
%   \end{Version}
%   \begin{Version}{2006/02/20 v1.1}
%   \item
%     DTX framework.
%   \item
%     Undefined tests changed.
%   \end{Version}
% \end{History}
%
% \PrintIndex
%
% \Finale
\endinput