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% lollipop-lists.tex copyright 1992/3 Victor Eijkhout
% copyright 2014--2016 Vafa Khalighi
%
%
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program. If not, see <http://www.gnu.org/licenses/>.
%
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%% L I S T S
\@GenericConstruct{List}
\newif\if@initem \@initemyes \newif\if@alitem
\newbox\@labelbox
\def\item{\Emessage{Item command outside list}}
% Breakpoints around a list
%
% first redefine generic defaults:
% try not to break before, maybe not after,
%
\add@List@default{\def\@beforepenalty{\penalty1000 }}
\add@List@default{\def\@afterpenalty{\penalty200 }}
% between items is okay
%
\add@List@default{\def\@betweenpenalty{\penalty-50 }}
\@ListOption{breakbetween}{
\switch {\if\EqualString{#1}}
{no} {\def\@betweenpenalty{\penalty\@M}}
{yes} {\def\@betweenpenalty{\CSname{\h@or@v fil}\penalty-\@M}}
{0} {\def\@betweenpenalty{}}
{default} {\edef\cs@e{\def\nxp\@betweenpenalty{\penalty\@w@w{#1}\relax}}
\cs@e}
\endswitch
}
\newtoks\indent@depth
\add@List@default{\indent@depth={}}
\noeol
\def\@DefineList{
\@DefineStopCommand{\nxp\xx@label \the\item@e@coms\@gen@close}
\csarg\edef{\@name}{\@gen@open
\ifitem@list \nxp\step@counter{itemlevel}\fi
\ifenum@list \nxp\step@counter{enumlevel}
\nxp\represent@counter{item}
{\nxp\enum@repr{\counter@@name{enumlevel}}}\fi
\ifleft@embedded@construct \previousindent\z@
\else \nxp\PushIndentLevel
\ifauto@indent \else \levelindent\the\indent@depth \fi
\parindent\levelindent
\fi
\nxp\@alitemno
\nxp\start@counter{item}%
\the\item@b@coms
\def\nxp\item@label{
\nxp\ifdim\wd\@labelbox>\tempdima
\ifitem@tab \advance\tempdima20pt\relax
{\nxp\item@label}
\else \iflabel@flow@right
\ifleft@embedded@construct
\else\hskip-\previousindent\fi
\box\@labelbox
\else \nxp\llap{\box\@labelbox}\fi\fi
\nxp\else \llap{\hbox to \tempdima
{\ifleft@item\else\hfil\fi
\box\@labelbox \ifleft@item\hfil\fi}}
\nxp\fi}%
\def\nxp\num@item
{\setbox\@labelbox=\hbox{\the\item@coms}
\tempdima\previousindent
\nxp\item@label %\nxp\Indent:no
\the\item@a@coms \nxp\xx@label}
\def\nxp\item
{\ifleft@embedded@construct
\else \nxp\if@alitem\@par%\CSname{@itembreek}%
\nxp\hold@parskip \nxp\fi \fi
\nxp\if\nxp\TestCounter:item >0 \@betweenpenalty \nxp\fi
\CSname{@\h@or@v white}{\white@between}
\nxp\@initemno \nxp\@alitemyes \nxp\noindent
\nxp\step@counter{item}\relax
\iflabel@defined\else\nxp\define@reference{item}\fi
\CSname{\@name @item}}
}
\csarg\edef{\@name @item}{
\iflist@has@description \nxp\desc@item
\else \nxp\num@item\fi}
\@Labelize{\@name @item}
}
\normaleol
% Inside a list Foo \item is defined as
%
% \item = all sorts of skips and switches
% step item counter, define reference
% \Foo@item
%
% \Foo@item[opt.lab.] = \desc@item or \num@item
%
% \desc@item =
% { \aftergroup\num@item \@description}
%
% \num@item = \item@label \item@a@coms \xx@label
%
% Item
% start with start/left/right
% indicating alignment, start = left
%
\newif\ifleft@item \newif\ifitem@tab
\add@List@default{\left@itemyes \item@tabno}
\newtoks\item@coms % content of the item label
\newtoks\item@b@coms % start of the list?
\newtoks\item@a@coms % immediately after the item
\newtoks\item@e@coms % after the whole list
\add@List@default{\item@coms{}\item@b@coms{}\item@a@coms{}
\item@e@coms{}\def\@current@options@list{item@b@coms}}
\@ListOption{item}{
\switch {\if\EqualString{#1}}
{stop} {\@add@toks{\egroup}\e@group
\def\@current@options@list{item@a@coms}}
{tabstop} {\item@tabyes
\@add@toks{\egroup}\e@group
\def\@current@options@list{item@a@coms}}
{left} {\global\left@itemyes
\b@group\def\@current@options@list{item@coms}%
\@add@toks{\bgroup}}
{start}{\global\left@itemyes
\b@group\def\@current@options@list{item@coms}%
\@add@toks{\bgroup}}
{right}{\global\left@itemno
\b@group\def\@current@options@list{item@coms}%
\@add@toks{\bgroup}}
{default} {\Emessage{Unknown option #1 for List, item}}
\endswitch}
% Label overflow
%
\newif\iflabel@flow@right
\add@List@default{\label@flow@rightyes}
\@ListOption{labeloverflow}{
\if\EqualString{#1}{left}\label@flow@rightno
\else\label@flow@rightyes\fi}
% Description
% the line after \item gets picked up,
% and becomes available as `description'
%
\newif\iflist@has@description
\add@List@default{\list@has@descriptionno}
\@ListOption{description}{
\global\list@has@descriptionyes \@add@toks{\description@text}}
{\noeol
\othercr
\gdef\@description{\bgroup\othercr \@@description}
\gdef\@@description#1^^M
{\gdef\description@text{#1}%
\egroup % balance the \bgroup in \@description
% which kept the \othercr local
\egroup % balance the \bgroup in \desc@item
% which enabled the \aftergroup\num@item
}
}
\def\desc@item{\bgroup
\aftergroup\num@item
\@description}
% White between items
%
\add@List@default{\def\white@between{0pt}}
\@ListOption{whitebetween}{\def\white@between{#1}}
% \edef\white@between{\@w@w{#1}}}
% Indentation
% is automatic (default) and level dependent
% or explicit
%
\newif\ifauto@indent
\add@List@default{\auto@indentyes}
\@ListOption{indentation}{
\if\EqualString{#1}{automatic}\auto@indentyes
\else\auto@indentno
\edef\cs@e{\nxp\indent@depth={\@w@w{#1}}}\cs@e
\fi}
% Tail of the list:
% everything after the keyword 'text' is tail
%
\@ListOption{text}{\at@breakpointyes
\def\@current@options@list{item@e@coms}}
%%%%%%%%%%%%%%%% List Nesting Counters
%
% Item sign
% gives the default, level dependent marker
%
\new@@counter{itemlevel} \set@counter{itemlevel}0
\newif\ifitem@list
\add@List@default{\item@listno}
\@ListOption{itemsign}{
\global\item@listyes
\edef\cs@e{\nxp\@add@toks
{\nxp\ifcustom@label\nxp\the\current@label
\nxp\else\nxp\item@sign\counter@@name{itemlevel}%
\nxp\fi}}
\cs@e}
\def\@item@sign#1{itemsign\romannumeral#1}
\def\item@sign#1{\if\UndefinedCS{\@item@sign{#1}}\@@item@sign{#1}%
\else \csname \@item@sign{#1}\endcsname \fi}
\def\@@item@sign#1{\ifcase#1\relax\or
$\bullet$\or $\circ$ \or --\else $\cdot$\fi}
\def\SetItemSign:#1=#2{\csarg\edef{\@item@sign{#1}}%
{\cswitch \ifx#2 in:
b $\bullet$;
c $\circ$;
d $\diamond$;
m ---;
n --;
. $\cdot$;
default $\cdot$;
\endswitch}}
% Item Counter
%
% Allocate a bare bones counter
\new@@counter{item}\represent@counter{item}1
\newtoks\item@RL \item@RL{}
% Keep track of enumerate list level
%
\new@@counter{enumlevel} \set@counter{enumlevel}0
\newif\ifenum@list
\add@List@default{\enum@listno}
\@ListOption{itemCounter}{
\global\enum@listyes
\@add@toks{\pad@clear\ifcustom@label\the\current@label
\else\itemCounter\fi}
}
\def\@enum@repr#1{enumrepr\romannumeral#1}
\def\enum@repr#1{\if\UndefinedCS{\@enum@repr{#1}}\@@enum@repr{#1}%
\else \csname \@enum@repr{#1}\endcsname \fi}
\def\@@enum@repr#1{\ifcase#1\relax\or
1\or A\or I\or a\or i\else 1\fi}
\def\SetItemCounterRepresentation:#1=#2{\csarg\edef{\@enum@repr{#1}}{#2}}
%
\def\@itembreek{\if@initem\par\fi}
% Clear items for Widest.
% this is rather susceptible for improvement.
%
\def\ClearFor:#1
{\def\widest@pad{#1}}
\def\widest@pad{\m@ne}
\def\pad@clear{\ifnum\widest@pad=\m@ne\else
\tempcounta\widest@pad
\advance\tempcounta-\LogTen{\cs@counter@name{item}}\relax
\hphantom{\ifcase\tempcounta \or 9\or 99 \or 999 \or 9999 \else 99999\fi
}%
\fi}
%%%%%%%%%%%%%%%% Stripped Lists
%
% for use in external files
%
\@GenericConstruct{ExternalItem}%stripped list
\add@ExternalItem@default{\extra@args\tw@}
\noeol
\def\@DefineExternalItem{
\@DefineStopCommand{\@gen@close}
\ifx\pre@fix\@empty \Wmessage{No file for external item: \@name}\fi
\edef\cs@e{\nxp\append@to@list
{\pre@fix @local@defs}
{\nxp\if\nxp\UndefinedCS{\@command}
\nxp\Wmessage{Item `\@name' not defined for `\pre@fix'}
\nxp\else
\let\CSname{\@name}\CSname{\@command}
\nxp\fi}}
\cs@e
\csarg\edef{\@command}##1##2{
\def\CSname{\@name Label}{##1}
\@gen@open\def\nxp\Page{##2}
\nxp\PushIndentLevel \let\nxp\nl\relax
\the\item@b@coms
\def\nxp\item{\ifleft@embedded@construct\else\noindent\fi
\setbox\@labelbox=\hbox{\the\item@coms}
\nxp\ifdim\wd\@labelbox>\previousindent
\iflabel@flow@right \hskip-\previousindent\box\@labelbox
\else \nxp\llap{\box\@labelbox}\fi
\nxp\else \llap{\hbox to \previousindent
{\ifleft@item\else\hfil\fi
\box\@labelbox \ifleft@item\hfil\fi}}
\nxp\fi}%
\ifexternal@item@has@item\nxp\item\the\item@a@coms\fi
\ifright@embedded@construct\else\@par\fi
\iflong@external\else\nxp\>\fi
}
}
\normaleol
\add@ExternalItem@default{\@whitebefore\z@toks}
\add@ExternalItem@default{\@whiteafter\z@toks}
\add@ExternalItem@default{\let\Page\@space
\csarg\let{\@name Label}\@space}
% Specify for what external file this is meant
%
\@ExternalItemOption{file}{
\if\UndefinedCS{\file@ext@name{#1}}
\Emessage{File <#1> has not been defined yet}\fi
\def\pre@fix{#1}}
\newif\iflong@external
\add@ExternalItem@default{\long@externalno}
\@ExternalItemOption{long}{
\csname long@external#1\endcsname}
% Commands before and after
% option 'title' is dummy
%
%\@ExternalItemOption{title}{}
% dangerous: better rely on automatic titelization
% Item
% start with start/left/right
% indicating alignment, start = left
%
\add@ExternalItem@default{\left@itemyes}
\add@ExternalItem@default{\item@coms{}\item@b@coms{}\item@e@coms{}
\item@a@coms{}\def\@current@options@list{item@b@coms}}
\newif\ifexternal@item@has@item
\adds@ExternalItem@default{\external@item@has@itemno}
\def\ExternalItem@item{\external@item@has@itemyes
\List@item}
% Label overflow
%
\add@ExternalItem@default{\label@flow@rightyes}
\let\ExternalItem@labeloverflow\List@labeloverflow
\endinput
% 92/11/26 itemsign / itemCounter changed to handle custom@label
% 93/01/03 item call in ExternalItem made conditional
|