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authorKarl Berry <karl@freefriends.org>2010-02-24 01:07:29 +0000
committerKarl Berry <karl@freefriends.org>2010-02-24 01:07:29 +0000
commitc4e458377ddcd72ee50f86efd022f8261069b018 (patch)
tree7857cf53de3cf5d5a90071f832cdc9c06f1bd6ca /Master/texmf-dist/tex/latex/ltxmisc
parentda272fd2a178269b07d9b51671f44c4c24b00cc1 (diff)
oubraces doc update, own package (23feb10)
git-svn-id: svn://tug.org/texlive/trunk@17175 c570f23f-e606-0410-a88d-b1316a301751
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-rw-r--r--Master/texmf-dist/tex/latex/ltxmisc/oubraces.sty92
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-% oubraces.sty: Interleave \overbrace with \underbrace
-% Donald Arseneau, 1993
-%
-% \overunderbraces{upper_braces}{main_formula}{lower_braces}
-%
-% Instructions are given below, after \endinput.
-%
-% First, set catcode of @ in case it isn't a "letter" already
-\expandafter\edef\csname REST@catcode\endcsname
- {\catcode`\noexpand\@=\the\catcode`\@
- \let \csname SREST@catcode\endcsname \noexpand\UnDefinedButNoAt}
-\catcode`\@=11
-
-\def\overunderbraces #1#2#3{{%
- \baselineskip\z@skip \lineskip4\p@ \lineskiplimit4\p@
- \displaystyle % deliberately generate error if not in math mode!
-% first, do the top half of the alignment in a save-box ...
- \setbox\z@\vbox{\ialign{&\hfil${}##{}$\hfil\cr
- \global\let\br\br@label #1\cr % upper labels
- \global\let\br\br@down #1\cr % upper braces
- #2\cr % main line of the formula
- }}% finished partial alignment and \vbox.
- \dimen@-\ht\z@ % Measure height of partial alignment --
-% ... it is the height we want for the whole.
-% Now do the whole alignment (notice the repetition from above)
- \setbox\z@\vbox{\ialign{&\hfil${}##{}$\hfil\cr
- \global\let\br\br@label #1\cr % upper labels
- \global\let\br\br@down #1\cr % upper braces
- #2\cr % main line of the formula
- \global\let\br\br@up #3\cr % lower braces
- \global\let\br\br@label #3\cr % lower labels
- }}% finished whole alignment and \vbox.
- \advance\dimen@\ht\z@ % calc. the necessary lowering
- \lower\dimen@\hbox{\box\z@}% shift to get the desired height
-}}
-
-% Three aliases for \br.
-% #1=number of spanned columns, #2=label
-\def\br@up#1#2{\multispan{#1}\upbracefill}
-\def\br@down#1#2{\multispan{#1}\downbracefill}
-\def\br@label#1#2{\multispan{#1}\hidewidth $#2$\hidewidth}
-
-\REST@catcode
-
-\endinput
-%
-%-----------------------------------------------------------------
-%
-% oubraces.sty: Interleave \overbrace with \underbrace
-% Donald Arseneau, 1993
-%
-% The syntax is:
-%
-% \overunderbraces{upper_braces}{main_formula}{lower_braces}
-%
-% Suppose we want the equation:
-% x y
-% ,-----^-----. ,-----^-----.
-% a + b + c + d + e + f + g + h + i + j + k + l + m = \pi r^2
-% `-----v-----'
-% z
-% There are seven segments:
-% x y
-% ,-----^-----. ,-----^-----.
-% a + b + c + d + e + f + g + h + i + j + k + l + m = \pi r^2
-% 11111111222222223333344455555666666667777777777...
-% `-----v-----'
-% z
-% Insert & between each segment (where the tips of the braces point)
-% to type the main_formula:
-% x y
-% ,-----^-----. ,-----^-----.
-% a + b +&c + d +&e + f&+&g + h&+ i + j&+ k + l + m
-% `-----v-----'
-% z
-% Each brace should be specified by typing
-%
-% \br{number_of_segments}{label},
-%
-% separated by & to indicate which segment to start at; and
-% where & & skips a segment that has no brace. For our
-% example formula, the upper and lower brace specifiers are:
-%
-% top row: &\br{2}{x}& &\br{2}{y}
-% bot row: & &\br{3}{z}
-%
-% Now put them all together:
-%
-% \overunderbraces{&\br{2}{x}& &\br{2}{y}}%
-% {a + b +&c + d +&e + f&+&g + h&+ i + j&+ k + l + m}%
-% {& &\br{3}{z}}
-% = \pi r^2