diff options
Diffstat (limited to 'Master/texmf-dist/tex/latex/fwlw')
| -rw-r--r-- | Master/texmf-dist/tex/latex/fwlw/fwlw.sty | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/latex/fwlw/fwlw.sty b/Master/texmf-dist/tex/latex/fwlw/fwlw.sty new file mode 100644 index 00000000000..17498f0bd51 --- /dev/null +++ b/Master/texmf-dist/tex/latex/fwlw/fwlw.sty @@ -0,0 +1,141 @@ +% F W L W . S T Y ( First Word, Last Word ) +% +% Donald Arseneau (1993, 1995) +% +% Modifications to LaTeX output mechanism to determine the first and +% last words on the current page, plus the first word on the *next* +% page. These can be used in head-lines or foot-lines. The `words' +% you see may not be real words, but any unbreakable object. +% +% Such labelling does not make sense when \chapter generates a page +% break, so the last page before a \chapter (or any \clearpage) gets +% a blank "next word", and the first page of the chapter gets a blank +% "first word". There is a problem when footnotes split: the "next word" +% is blank. +% +% Two pagestyles are defined to print these words: \pagestyle{NextWordFoot} +% which helps you read ahead to the word on the next page; and \pagestyle +% {fwlwhead} which is like the headers in a lexicon. Or you can use the +% words in your own page-style... +% The words are available in the box registers: +% \FirstWordBox - first word on this page +% \NextWordBox - first word on next page +% \LastWordBox - last word on this page +% Use them in your header lines like: \copy\LastWordBox. +% +% Note that `words' may be things like: +% - two~words +% - [ ]Word ( [ ] represents a parindent box) +% - a whole displayed equation +% - the first column of an aligned equation +% - anomalously blank, if there are \writes or split footnotes etc. +% - partial words like par- or -tial. +% +% An entirely different approach is possible using \mark and \obeyspaces, +% and would have different problems. The problems with catcode changes +% may be more or less serious for your particular application. You are +% welcome to write a package using that method. The best solution would +% involve \mark and an input filter program to +% `\w{tag} \w{each} \w{word}, \w{in} \w{some} \w{way}.' + +\mathchardef\LW@pen 12345 +\newbox\FirstWordBox \global\setbox\FirstWordBox\hbox{} +\newbox\NextWordBox \global\setbox\NextWordBox\hbox{} +\newbox\LastWordBox \global\setbox\LastWordBox\hbox{} +\newbox\LW@box \global\setbox\LW@box\hbox{} +\newbox\LW@saved + +\def\ps@fwlwhead{\let\@mkboth\@gobbletwo + \def\@oddhead{\if@fcolmade\else \copy\FirstWordBox\hfil\copy\LastWordBox\fi}% + \let\@evenhead\@oddhead % no word-heads on float pages. + \let\@oddfoot\@empty\let\@evenfoot\@oddfoot + \let\chaptermark\@gobble\let\sectionmark\@gobble\let\subsectionmark\@gobble + } + +\def\ps@NextWordFoot{\let\@mkboth\@gobbletwo + \let\@oddhead\@empty\let\@evenhead\@oddhead + \def\@oddfoot{\hfil\thepage\hfil\llap{\copy\NextWordBox}}\let\@evenfoot\@empty + \let\chaptermark\@gobble\let\sectionmark\@gobble\let\subsectionmark\@gobble + } + +% Shell around old output routine. Gets first word from next page by +% letting TeX continue with \vsize=0 to get a look at the next line. +% Values of \outputpenalty for \specialoutput ( -10001 to -19999 ) are +% simply run through the output routine. +% \supereject and \clearpage give a blank "next word" +% When called after making a stub-page the stub is returned to the vertical +% list, the previous page is restored and shipped out normally, but +% knowing what the next word will be. + +\edef\FWLWnorm@L@output{\the\output} + +\output{\@tempswafalse +\ifnum \outputpenalty>-\@MM \ifnum\outputpenalty<-\@M \@tempswatrue\fi\fi +\if@tempswa % special (float) output +% \message{Float handler: penalty=\the\outputpenalty}% + \FWLWnorm@L@output +\else + \ifvoid\LW@saved % end of real page +% \message{End of real page}% + \global\setbox\LW@saved\copy\@cclv % save page + \setbox\@tempboxa\vbox{\unvbox\@cclv \unskip\unkern\unpenalty + \unskip\unkern\unpenalty \unskip\unkern\unpenalty + \setbox\@tempboxa\lastbox + \LW@getlast@word\@tempboxa\LastWordBox + }\ifnum\outputpenalty>-\@MM % not \supereject + \xdef\LW@vsize{\global\vsize\the\vsize + \global\holdinginserts\the\holdinginserts}% + \global\vsize\z@ \global\holdinginserts\@ne + \else % \supereject, just output, don't look for word on next page +% \message{caused by super-eject.} + \global\setbox\@cclv\box\LW@saved + \global\setbox\NextWordBox\hbox{}% + \FWLWnorm@L@output + \global\setbox\FirstWordBox\box\NextWordBox + \fi + \else % saved page => just did tiny page to get next word +% \message{Just got next line:}{\tracingall\showboxdepth2 \showbox\@cclv}% + \setbox\@tempboxa\vbox{\penalty\LW@pen\unvcopy\@cclv \LW@getall@boxes + \ifvbox\LW@box \penalty\LW@pen\unvbox\LW@box \LW@getall@boxes\fi + \ifvbox\LW@box \global\setbox\NextWordBox\hbox{}\else + \LW@getfirst@word\LW@box\NextWordBox + \fi}% Return tiny page to page list: + \unvbox\@cclv \ifnum\outputpenalty<\@M \penalty\outputpenalty\fi + \LW@vsize\relax + \global\setbox\@cclv\box\LW@saved + \FWLWnorm@L@output + \global\setbox\FirstWordBox\box\NextWordBox +\fi\fi} + +% globally get last "word" from a box (#1) into another box (#2) +\def\LW@getlast@word#1#2{\setbox\@tempboxa\vbox{\hsize\maxdimen \@parboxrestore + \hyphenpenalty\@M \exhyphenpenalty\@M + \rightskip\fill \looseness\@M \linepenalty\z@ + \noindent\unhbox#1\endgraf + \unskip\unkern\unpenalty \global\setbox\LW@box\lastbox + }\LW@repack{#2}} + +% globally get first "word" from a box (#1) into another box (#2) +\def\LW@getfirst@word#1#2{\setbox\@tempboxa\vbox{\@parboxrestore + \parshape\thr@@ \z@\z@ \z@\z@ \z@\maxdimen \parfillskip\fill + \hyphenpenalty\@M \exhyphenpenalty\@M + \hbadness\@MM \overfullrule\z@ \hfuzz\maxdimen + \ifhbox#1\noindent + \vadjust{\penalty\LW@pen}\penalty-\@M\unhbox#1% eliminate previous \leftskip + \else\ifvbox#1\penalty\LW@pen\unvbox#1\fi\fi + \endgraf + \@tempcnta\z@ \LW@getall@boxes}\LW@repack{#2}} + +% Go through a vertical list that starts with special penalty +\def\LW@getall@boxes{\global\setbox\LW@box\lastbox \unskip\unkern \unskip\unkern + \let\@tempa\relax + \ifvoid \LW@box \advance\@tempcnta\@ne \else \@tempcnta\z@ \fi + \ifnum\lastpenalty=\LW@pen \else \unpenalty\fi + \ifnum\lastpenalty=\LW@pen \else \unpenalty\fi + \ifnum\lastpenalty=\LW@pen \else \ifnum\@tempcnta<5 + \let\@tempa\LW@getall@boxes \fi \fi \unpenalty \@tempa} + +% Put contents of \LW@box into hbox #1 +\def\LW@repack#1{\global\setbox#1\hbox{\ifhbox\LW@box + \unhbox\LW@box\unskip\unskip\unpenalty\unskip + \else\ifvbox\LW@box\box\LW@box\fi\fi}} |