summaryrefslogtreecommitdiff
path: root/macros/latex-dev/base/oldlfont.dtx
blob: 56204af7ae472f5b2ac3cadfb1281f193ee40a7c (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
% \iffalse meta-comment
%
% Copyright (C) 1993-2021
% The LaTeX3 Project and any individual authors listed elsewhere
% in this file.
%
% This file is part of the LaTeX base system.
% -------------------------------------------
%
% It may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
%    https://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2008 or later.
%
% This file has the LPPL maintenance status "maintained".
%
% The list of all files belonging to the LaTeX base distribution is
% given in the file `manifest.txt'. See also `legal.txt' for additional
% information.
%
% The list of derived (unpacked) files belonging to the distribution
% and covered by LPPL is defined by the unpacking scripts (with
% extension .ins) which are part of the distribution.
%
% \fi
%\iffalse   % this is a METACOMMENT !
%
%% File `oldlfont.dtx'.
%% Copyright (C) 1989-1995 Frank Mittelbach and Rainer Sch\"opf,
%% all rights reserved.
%
%<*dtx>
          \ProvidesFile{oldlfont.dtx}
%</dtx>
%<package>\NeedsTeXFormat{LaTeX2e}
%<package>\ProvidesPackage{oldlfont}
%<driver> \ProvidesFile{oldlfont.drv}
%<*!latex209>
% \fi
%         \ProvidesFile{oldlfont.dtx}
          [2014/09/29 v2.2k Standard LaTeX package]
%
% \iffalse
%</!latex209>
%<*driver>
\documentclass{ltxdoc}
\begin{document}
\DocInput{oldlfont.dtx}
\end{document}
%</driver>
% \fi
%
%
%
%
%
% \providecommand\dst{\expandafter{\normalfont\scshape docstrip}}
%
% \GetFileInfo{oldlfont.dtx}
%
% \title{The file \texttt{oldlfont.dtx} for use with
%        \LaTeXe.\thanks{This file has version
%        number \fileversion, dated \filedate.}\\[2pt]
%        It contains the code for \texttt{oldlfont.sty}}
%
% \author{Frank Mittelbach}
%
% \MaintainedByLaTeXTeam{latex}
% \maketitle
%
% \section{Introduction}
%
%    This file contains the code for the \texttt{oldlfont} package
%    which emulates the following \LaTeX~2.09 font commands:
%    \begin{itemize}
%    \item The two-letter font-changing commands |\rm|, etc.~are
%       defined to cancel each other out as they did in \LaTeX~2.09.
%    \item The two-letter font-changing commands are allowed in math
%       mode.
%    \item The |latexsym| package is loaded.
%    \end{itemize}
%    For full compatibility mode, the file |latex209.def| is loaded by
%    |\documentstyle|.
%
% The following modules are used in the implementation to direct
% \dst{} in generating the external files:
% \begin{center}
% \begin{tabular}{ll}
%   driver   & produce a documentation driver file \\
%   package  & produce |oldlfont.sty| \\
%   latex209 & produce part of |latex209.def|
% \end{tabular}
% \end{center}
%
% \StopEventually{}
%
% \changes{v2.2k}{1995/11/29}{Remove duplicate driver code.}
%
% \section{The Code}
%
%
% \begin{macro}{\math@bgroup}
% \begin{macro}{\math@egroup}
%   To make \meta{math alphabet identifier} work like simple font
%   switches we change the meaning of |\math@bgroup| and
%   |\math@egroup| to |\@empty|. This emulates the behavior of
% \texttt{oldlfont.sty} in NFSS1 setups.  These definitions are not
%    part of \texttt{latex209} automatically, since to emulate 2.09
%    they are not necessary (all standard fonts are declared as math
%    symbol fonts).
% \changes{v2.2f}{1994/05/05}{Added saved versions of the
% math-groupers, CAR}
% \changes{v2.2g}{1994/05/09}{Moved outside latex209 part}
%    \begin{macrocode}
\let\math@bgroup\@empty
\let\math@egroup\@empty
\let \@@math@bgroup \math@bgroup
\let \@@math@egroup \math@egroup
%    \end{macrocode}
% \end{macro}
% \end{macro}
%
%
%    The rest of this document describes code that is used in
%    |oldlfont.sty| and |latex209.def|.
%    \begin{macrocode}
%<*package|latex209>
%    \end{macrocode}
%
%    When emulating the old settings we don't want a lot of NFSS
%    information being displayed. Thus we required that the
%    \texttt{tracefnt} package is loaded with the option
%    \texttt{errorshow}.
%    \begin{macrocode}
\RequirePackage[errorshow]{tracefnt}
%    \end{macrocode}
%
%    We define math \emph{alphabet} identifiers for the typefaces
%    described in the \LaTeX{} manual.  This is straightforward. Some
%    are already defined by the kernel code.
%    And here are the other ones defined by the old \LaTeX{}. They all
%    get declared as math symbol font alphabets. Thus we first
%    allocate the additional symbol fonts.
%    \begin{macrocode}
\DeclareSymbolFont{bold}{OT1}{cmr}{bx}{n}
\DeclareSymbolFont{sans}{OT1}{cmss}{m}{n}
\DeclareSymbolFont{typewriter}{OT1}{cmtt}{m}{n}
\DeclareSymbolFont{italic}{OT1}{cmr}{m}{it}
\DeclareSymbolFont{smallcaps}{OT1}{cmr}{m}{sc}
\DeclareSymbolFont{slanted}{OT1}{cmr}{m}{sl}
%    \end{macrocode}
%    And here are the corresponding math identifiers.
%    \begin{macrocode}
\DeclareSymbolFontAlphabet\mathbf{bold}
\DeclareSymbolFontAlphabet\mathsf{sans}
\DeclareSymbolFontAlphabet\mathtt{typewriter}
\DeclareSymbolFontAlphabet\mathsc{smallcaps}
\DeclareSymbolFontAlphabet\mathsl{slanted}
%    \end{macrocode}
%    We undefine the old |\mit| and |\cal| macros (whatever meaning
%    they have) and reallocate them as symbol font alphabets.
%    \begin{macrocode}
\let\mit\undefined
\let\cal\undefined
\let\mathit\undefined
\DeclareSymbolFontAlphabet\mathit{italic}
\DeclareSymbolFontAlphabet{\mit}{letters}
\DeclareSymbolFontAlphabet{\cal}{symbols}
%    \end{macrocode}
%
%    We define the font commands for selecting the typeface. They are
%    probably defined by the document class/style but we want to force
%    the old meaning.
%
%    And here are the definition as they were in \LaTeX~2.09 but
%    translated into NFSS2 language.
% \changes{v2.2h}{1994/05/11}{DPC use \cs{DeclareProtectedCommand}}
% \changes{v2.2i}{1994/05/13}{DPC renamed to \cs{DeclareRobustCommand}}
%    \begin{macrocode}
\DeclareRobustCommand\rm{\normalfont\rmfamily\mathgroup\symoperators}
\DeclareRobustCommand\sf{\normalfont\sffamily\mathgroup\symsans}
\DeclareRobustCommand\sl{\normalfont\slshape\mathgroup\symslanted}
\DeclareRobustCommand\bf{\normalfont\bfseries\mathgroup\symbold}
\DeclareRobustCommand\sc{\normalfont\scshape\mathgroup\symsmallcaps}
\DeclareRobustCommand\it{\normalfont\itshape\mathgroup\symitalic}
\DeclareRobustCommand\tt{\normalfont\ttfamily\mathgroup\symtypewriter}
%    \end{macrocode}
%     We also have to define the \emph{emphasize} font change command
%    (i.e.\ |\em|). This command will look whether the current font is
%    sloped (i.e.\ has a positive |\fontdimen1|) and will then select
%    either |\rm| or |\it|.
%    \begin{macrocode}
\DeclareRobustCommand\em{%
  \@nomath\em
  \ifdim \fontdimen\@ne\font>\z@\rm\else\it\fi}
%    \end{macrocode}
%
% \begin{macro}{\@setfontsize}
%    Font size changes are handled using the |\@setfontsize| command
%    (in new class files) or by the |@setsize| command in old document
%    style files. The latter is now defined to call |\@setfontsize| in
%    the NFSS2 kernel code.
%    Thus to make all size changing commands automatically return to
%    the normal font of the document we only have to slightly modify
%    the definition of |\@setfontsize| by adding a |\normalfont|
%    command to it.
% \changes{v2.2j}{1994/11/06}{Use \cs{@typeset@protect}}
%    \begin{macrocode}
\def\@setfontsize#1#2#3{\@nomath#1%
    \ifx\protect\@typeset@protect
      \let\@currsize#1%
    \fi
    \fontsize{#2}{#3}\normalfont}
%    \end{macrocode}
% \end{macro}
%
%
%  \begin{macro}{\non@alpherr}
%    Since we emulate the old syntax we also have to silently ignore
%    uses of a math alphabet outside math mode. Since we now use the
%    |\sym...| switches the following setting is not longer necessary.
%    \begin{macrocode}
%\let\non@alpherr\@gobble
%    \end{macrocode}
%  \end{macro}
%
%  \begin{macro}{\not@math@alphabet}
%    But we need to disable the error message that is generated from
%    |\bfseries| etc.
%    \begin{macrocode}
\let\not@math@alphabet\@gobbletwo
%    \end{macrocode}
%  \end{macro}
%
%
%    We left out the special \LaTeX{} fonts which are not automatically
%    included in the base version of the font selection since these
%    fonts contain only a few characters which are also included in
%    the AMS fonts so anybody who is using these fonts doesn't need
%    them.  But for compatibility reasons we will define these symbols.
%
%    \begin{macrocode}
\RequirePackage{latexsym}
%</package|latex209>
%    \end{macrocode}
%
% \DeleteShortVerb{\|}
% \Finale
\endinput