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Diffstat (limited to 'macros/luatex/optex/lists.opm')
-rw-r--r-- | macros/luatex/optex/lists.opm | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/macros/luatex/optex/lists.opm b/macros/luatex/optex/lists.opm new file mode 100644 index 0000000000..0b63409dce --- /dev/null +++ b/macros/luatex/optex/lists.opm @@ -0,0 +1,79 @@ +%% This is part of OpTeX project, see http://petr.olsak.net/optex + +\_codedecl \begitems {Lists: begitems, enditems <2020-03-14>} + + \_doc ----------------------------- + `\aboveliskip` is used above the list of items, + `\belowliskip` is used below the list of items and + `\interliskip` is used between items. + \_cod ----------------------------- + +\_def\_aboveliskip {\_removelastskip \_penalty-100 \_medskip} +\_def\_belowliskip {\_penalty-200 \_medskip} +\_def\_interliskip {} + + \_doc ----------------------------- + The `\itemnum` is localy reset to zero in each group declared by + `\begitems`. So nested lists are numbered independently. User can set + initial value of `\itemnum` to another value after `\beitems` if he/she want. + + Each level of nested lists is indented by new `\iindent` from left. + Default item mark is `\_printitem`. + + The `\begitems` runs `\_aboveliskip` only if we are not near below a title, + where a vertical skip is placed already and where the `\penalty` 11333 is. + \_cod ----------------------------- + +\_newcount\_itemnum \_itemnum=0 +\_newtoks\_printitem + +\_def\_begitems{\_par \_ifnum\_lastpenalty<10000 \_aboveliskip \_fi + \_bgroup + \_itemnum=0 \_adef*{\_startitem} + \_advance\_leftskip by\_iindent + \_printitem=\_defaultitem +} +\_def\_enditems{\_par\_egroup\_belowliskip} + +\_def\_startitem{\_par \_ifnum\_itemnum>0 \_interliskip \_fi + \_advance\_itemnum by1 + \_the\_everyitem \_noindent\_llap{\_the\_printitem}\_ignorespaces +} + + \_doc ----------------------------- + Various item marks are saved in `\_item:<letter>` macros. + You ca re-define then or define more such macros. + The `\style <letter>` does `\_printitem={\_item:<letter>}`. + \_cod ----------------------------- + +\_def\_style#1{% + \_ifcsname _item:#1\_endcsname \_printitem=\ea{\_csname _item:#1\_endcsname}% + \_else \_printitem=\_defaultitem \_fi +} +\_sdef{_item:o}{\_raise.4ex\_hbox{$\_scriptscriptstyle\_bullet$} } +\_sdef{_item:-}{- } +\_sdef{_item:n}{\_the\_itemnum. } +\_sdef{_item:N}{\_the\_itemnum) } +\_sdef{_item:i}{(\_romannumeral\_itemnum) } +\_sdef{_item:I}{\_uppercase\_ea{\_romannumeral\_itemnum}\_kern.5em} +\_sdef{_item:a}{\_athe\_itemnum) } +\_sdef{_item:A}{\_uppercase\_ea{\_athe\_itemnum}) } +\_sdef{_item:x}{\_raise.3ex\_fullrectangle{.6ex} } +\_sdef{_item:X}{\_raise.2ex\_fullrectangle{1ex}\_kern.5em} + + \_doc ----------------------------- + `\_athe{<num>}` returns the <num>s lowercase letter from the alphabet. + `\_fullrectangle{<dimen>}` prints full rectangle with given <dimen>. + \_cod ----------------------------- + +\_def\_fullrectangle#1{\_hbox{\_vrule height#1 width#1}} + +\_def\_athe#1{\_ifcase#1?\_or a\_or b\_or c\_or d\_or e\_or f\_or g\_or h\_or + i\_or j\_or k\_or l\_or m\_or n\_or o\_or p\_or q\_or r\_or s\_or t\_or + u\_or v\_or w\_or x\_or y\_or z\_else ?\_fi +} +\_public \begitems \enditems \style \itemnum ; + +\_endcode % ------------------------------------- + + |