summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/latex/froufrou/froufrou.sty
blob: 6d7e3d98e850d52e5e9f5c4872a21848fe445da6 (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
%%
%% This is file `froufrou.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% froufrou.dtx  (with options: `package')
%% Copyright 2020 Nelson Lago <lago@ime.usp.br>
%% 
%% 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 can be
%% found at 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'.
%% 
%% The Current Maintainer of this work is Nelson Lago <lago@ime.usp.br>.
%% 
\NeedsTeXFormat{LaTeX2e}[2015/01/01]
\ProvidesPackage{froufrou}[2020/12/22 1.2 Visual section separator]

\RequirePackage{etoolbox}
\RequirePackage{expl3}

\RequirePackage{fourier-orns}
\newcommand\@froufrouFleuron{%
    \bgroup
    \footnotesize
    \rule[.7mm]{.1\textwidth}{0.5pt}%
    \enspace\,%
    \decofourleft\decotwo\decofourright
    \enspace\,%
    \rule[.7mm]{.1\textwidth}{0.5pt}%
    \egroup
}

\newcommand\@froufrouSimpleFleuron{%
    \bgroup
    \footnotesize
    \decofourleft\decotwo\decofourright
    \egroup
}

\newcommand{\@froufrouTightAsterism}{%
  \bgroup
  \smash{%
    \raisebox{-.5ex}{%
      \setlength{\tabcolsep}{-.5pt}%
      \begin{tabular}{@{}cc@{}}%
        \multicolumn2c*\\[-2ex]*&*%
      \end{tabular}%
    }%
  }%
  \egroup
}

\newcommand{\@froufrouAsterism}{%
  \bgroup
  \smash{%
    \raisebox{-.5ex}{%
      \setlength{\tabcolsep}{0pt}%
      \begin{tabular}{@{}cc@{}}%
        \multicolumn2c*\\[-1.8ex]*&*%
      \end{tabular}%
    }%
  }%
  \egroup
}

\newcommand\@froufrouTrueAsterism{⁂}

\newcommand{\@froufrouDinkus}{\relax*\quad*\quad*}

\ExplSyntaxOn
\newcommand\setfroufrou[1]{%
  \str_case:nnF{#1}{
      {}{\relax}
      {fleuron}{\def\@froufrouOrnament{\@froufrouFleuron}}
      {simplefleuron}{\def\@froufrouOrnament{\@froufrouSimpleFleuron}}
      {asterism}{\def\@froufrouOrnament{\@froufrouAsterism}}
      {tightasterism}{\def\@froufrouOrnament{\@froufrouTightAsterism}}
      {trueasterism}{\def\@froufrouOrnament{\@froufrouTrueAsterism}}
      {dinkus}{\def\@froufrouOrnament{\@froufrouDinkus}}%
  }{\def\@froufrouOrnament{#1}}%
}
\ExplSyntaxOff

\def\@froufrouspacebefore{\vskip 22pt plus 7pt minus 5pt}
\def\@froufrouspaceafter{\@froufrouspacebefore}

\newcommand{\froufrou}{%
  \@ifstar{\@afterindenttrue\@realfroufrou}{\@afterindentfalse\@realfroufrou}%
}

\newcommand\frufru{\froufrou}

\newcommand{\@realfroufrou}[1][]{%
  % Make sure we left horizontal mode.
  \nopagebreak[4]\par

  \nopagebreak[4]\@froufrouspacebefore\nopagebreak[4]

  % Start a new group to (1) reset \doublespacing, \parskip, and
  % \baselineskip, so spacing is independent from the previous text
  % settings and (2) so that using #1 to change the ornament only
  % affects the current call. Then, start yet another group only
  % for the ornament because font size changes in it should not
  % affect spacing either.
  \bgroup
    \setfroufrou{#1}%
    \normalsize
    \ifdefvoid{\setstretch}{}{\setstretch{\setspace@singlespace}}% normally 1
    \setlength{\parskip}{0pt}
    \noindent\centering\bgroup\@froufrouOrnament\egroup\par
  \egroup

  \nopagebreak[4]\@froufrouspaceafter\nopagebreak[4]

  % Next paragraph's \doublespacing, \baselineskip, and \parskip
  % should not affect spacing.
  \@froufrouFixSpacingAfter

  % Breaking after the separator is acceptable as a last resort. Since
  % we use a lot of vertical space before/after it, not allowing this
  % break might lead to poor results in some cases.
  \nopagebreak[3]

  % Emulate the behavior of \section, \subsection etc: prevent
  % the first line of the next paragraph from being indented
  % and absolutely forbid a club line in the next paragraph.
  \@afterheading
}

\newcommand\@froufrouFixSpacingAfter{
  % The next \par will add \parskip and \baselineskip. We want to
  % (1) eliminate \parskip so that spacing does not change if it
  % is nonzero and (2) add the "normal" \baselineskip, even if the
  % text is set using \doublespacing. These adjustments may be off
  % if font size, \parskip or \baselineskip are changed before the
  % next paragraph.

  \nopagebreak[4]\vskip -\parskip

  \ifdefvoid{\setstretch}
    {}
    {
      \bgroup
        % \singlespacing may add an extra \baselineskip; let's
        % avoid surprises and use \setstrech instead.
        \setstretch {\setspace@singlespace}%  normally 1
        \nopagebreak[4]\vskip \baselineskip
      \egroup

      \nopagebreak[4]\vskip -\baselineskip
    }
}

\DeclareOption{fleuron}{\setfroufrou{fleuron}}
\DeclareOption{simplefleuron}{\setfroufrou{simplefleuron}}
\DeclareOption{asterism}{\setfroufrou{asterism}}
\DeclareOption{tightasterism}{\setfroufrou{tightasterism}}
\DeclareOption{trueasterism}{\setfroufrou{trueasterism}}
\DeclareOption{dinkus}{\setfroufrou{dinkus}}
\DeclareOption*{\PackageWarning{froufrou}{Unknown option `\CurrentOption'}}
\ExecuteOptions{fleuron}
\ProcessOptions\relax

\endinput
%%
%% End of file `froufrou.sty'.