summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/latex/sttools/flushend.sty
blob: 83e3186a6c6cad5b43aa5fe3b7300235a8c6593e (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
%% flushend.sty
%% Copyright 1997 Sigitas Tolu\v sis
%% VTeX Ltd., Akademijos 4, Vilnius, Lithuania
%% e-mail sigitas@vtex.lt
%% http://www.vtex.lt/tex/download/macros/
%%
% This program can redistributed and/or modified under the terms
% of the LaTeX Project Public License Distributed from CTAN
% archives in directory macros/latex/base/lppl.txt; either
% version 1 of the License, or (at your option) any later version.
%
% PURPOSE:   Balanced columns on last page in twocolumn mode.
%
% SHORT DESCRIPTION:
%
% \flushend (loaded by default)
% ---------
%   Switches on column balancing at last page
%
% \raggedend
% ----------
%   Switches off column balancing at last page
%
% \atColsBreak={#1}
% ------------------
%   Adds #1 in place of original column break (without balancing)
%   Example: \atColsBreak{\vskip-2pt}
%
% \showcolsendrule
% ----------------
%   Adds rule to the bottom of columns (just for debugging)
%
% P.S. To stretch right column by #1 add command \vskip-#1 just before
%      command \end{document}.
%      TO shrink right column by #1 add command \vskip#1 just before
%      command \end{document}.
%      Example: \vskip-10pt
%               \end{document}
%
% \changes{1997/05/16}{first version}
% \changes{1997/09/09}{support for compatibility with cuted.sty}
% \changes{1997/10/01}{\vipersep changed to \stripsep for compatibility with cuted.sty}
%
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{flushend}[1997/10/01]
%
\newbox\@aaa
\newbox\@ccc
\@ifundefined{@viper}{\newbox\@viper}{}
\@ifundefined{hold@viper}{\newbox\hold@viper}{}
\newtoks\atColsBreak \atColsBreak={}
\newdimen\@extra@skip \@extra@skip\z@
\newdimen\@nd@page@rule \@nd@page@rule\z@
\def\last@outputdblcol{%
  \if@firstcolumn
    \global \@firstcolumnfalse
    \global \setbox\@leftcolumn \box\@outputbox
  \else
    \global \@firstcolumntrue
    \if@lastpage
      \@tempdima\ht\@leftcolumn
      \splittopskip\topskip\splitmaxdepth\maxdepth
      \setbox\@tempboxa\vbox{%
                \unvbox\@leftcolumn\setbox0\lastbox\unskip%
                \the\atColsBreak%
                \unvbox\@outputbox\setbox0\lastbox\unskip}%
      \@tempdimb .5\ht\@tempboxa%
     \loop
     \setbox\@aaa\copy\@tempboxa%
     \setbox\@ccc\vbox to\@tempdimb{%
                \vsplit\@aaa to\@tempdimb\vss\vsplit\@aaa to\@tempdimb}%
     \wlog{Extra height:\the\ht\@aaa\space when \the\@tempdimb}%
     \ifvoid\@aaa \else \advance\@tempdimb 1pt \repeat%
     \loop
     \setbox\@aaa\copy\@tempboxa%
     \setbox\@ccc\vbox to\@tempdimb{%
                \vsplit\@aaa to\@tempdimb\vss}%
     \wlog{(2)Left:\the\ht\@ccc\space Right:\the\ht\@aaa\space Output:\the\@tempdimb}%
     \ifdim \ht\@ccc<\ht\@aaa \@tempdimb \the\ht\@aaa \repeat%
     \wlog{- LAST -^^JExtra skip:\the\@extra@skip^^JLeft:\the\ht\@ccc^^JRight:\the\ht\@aaa^^JOutput:\the\@tempdimb}%
    \setbox\@ccc\vbox to\@tempdimb{%
                \vsplit\@tempboxa to\@tempdimb\vss}%
    \setbox\@leftcolumn\vbox to\@tempdima{%
                \vbox to\@tempdimb{\unvbox\@ccc}%
                \hrule\@height\@nd@page@rule%
                \vss}%
    \setbox\@outputbox\vbox to\@tempdima{%
                \vbox to\@tempdimb{\unvbox\@tempboxa\vfilneg\vskip\@extra@skip}%
                \hrule\@height\@nd@page@rule%
                \vss}%
    \setbox\@outputbox \vbox {%
                         \hb@xt@\textwidth {%
                           \hb@xt@\columnwidth {%
                             \box\@leftcolumn \hss}%
                           \hfil
                           \vrule \@width\columnseprule
                           \hfil
                           \hb@xt@\columnwidth {%
                             \box\@outputbox \hss}%
                                             }%
                              }%
    \else
    \setbox\@outputbox \vbox {%
                         \hb@xt@\textwidth {%
                           \hb@xt@\columnwidth {%
                             \box\@leftcolumn \hss}%
                           \hfil
                           \vrule \@width\columnseprule
                           \hfil
                           \hb@xt@\columnwidth {%
                             \box\@outputbox \hss}%
                                             }%
                              }%
    \fi
    \ifvoid\hold@viper
    \else
      \setbox\@outputbox \vbox{\box\hold@viper\box\@outputbox}%
    \fi
    \@combinedblfloats
    \@outputpage
    \begingroup
      \@dblfloatplacement
      \@startdblcolumn
      \@whilesw\if@fcolmade \fi
        {\@outputpage
         \@startdblcolumn}%
      \ifvoid\@viper
      \else
        \global\setbox\@viper\vbox{%
                \vskip-\stripsep\unvbox\@viper}\@viperoutput
      \fi
    \endgroup
  \fi
}
\let\prev@enddocument\enddocument
\newif\if@lastpage \@lastpagefalse
\def\enddocument{\global\@lastpagetrue\let\@outputdblcol\last@outputdblcol\prev@enddocument}
\def\raggedend{\global\let\enddocument\prev@enddocument}
\def\flushend{\gdef\enddocument{\global\@lastpagetrue\let\@outputdblcol\last@outputdblcol\prev@enddocument}}
\def\showcolsendrule{\global\@nd@page@rule=.4pt}
\endinput