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diff --git a/Master/texmf-dist/source/latex3/xor/xmarks.dtx b/Master/texmf-dist/source/latex3/xor/xmarks.dtx new file mode 100644 index 00000000000..c8286827ec0 --- /dev/null +++ b/Master/texmf-dist/source/latex3/xor/xmarks.dtx @@ -0,0 +1,956 @@ +% \iffalse +%% +%% (C) Copyright 1999 Frank Mittelbach +%% All rights reserved. +%% +%% Not for general distribution. In its present form it is not allowed +%% to put this package onto CD or an archive without consulting the +%% the authors. +%% +% \begin{macrocode} +\def\next#1: #2.dtx,v #3 #4 #5 #6 #7$#8{ +%<*dtx> + \ProvidesFile{#2.dtx} +%</dtx> +%<package>\ProvidesPackage{#2} +%<driver>\ProvidesFile{#2.drv} + [#4 #3 #8 (#6)]} +\next$Id: xmarks.dtx,v 1.6 2000/06/13 20:47:23 latex3 Exp $ + {multiple marks} +% \end{macrocode} +% +%<*driver> + \documentclass{ltxdoc} +% + \begin{document} + \DocInput{xmarks.dtx} + \end{document} +%</driver> +% +% \fi +% +% +% \GetFileInfo{xmarks.dtx} +% +% \title{The \textsf{xmarks} package\thanks{This file +% has version number \fileversion, last +% revised \filedate.}} +% \author{FMi} +% \date{\filedate} +% +% \maketitle +% +% \tableofcontents +% +% +% +% \section{Mark algorithm} +% +% To allow for completely independent marks we use the following +% procedure: +% \begin{itemize} +% \item +% For every mark of type \meta{type} we have a queue that holds every mark +% info found in memory. Every info is associated with a unique number, +% i.e., we simply count them. The queue always holds at least one item +% which is the previous mark info, i.e., the last mark for that type on +% the previous page. +% +% \item +% We use \TeX's internal mark mechanism only to record the associated +% numbers for marks for every type on the current page. +% +% \item +% For every \meta{type} we record the info-number that belongs to the last +% mark of the previous page. +% +% \item +% By looking at \TeX's internal |\botmark| we can determine the +% info-number of the last mark for every \meta{type} that is on the current +% page. +% +% \item +% The difference between this number and the info-number from the last +% page gives us the number of marks for every \meta{type} on the current page. +% +% \item +% That way we are able to decide how to extract items from the queue so +% that first, last, and previous mark for every type can be accessed. +% \begin{itemize} +% \item +% If the difference is zero, no new marks have been added on the +% current page, therefore the only item on the corresponding mark type +% queue holds the info that should be previous, first, and last mark of +% this type for the current page. +% \item +% If the difference is one, then the first item in the queue represents +% the info that should become the previous mark (it will be popped off) +% and the second item (which will be kept, since it will become the +% previous mark for the next page) should become first and last mark for +% the current page. +% \item +% Otherwise we had at least two marks for this type on the current page. +% Therefore, the first item in the queue will become previous mark (popped +% off), the second will become first mark (popped off), then we pop off +% all but the last item in the queue, which will become last mark, by only +% looking at it. +% \end{itemize} +% In other words every queue should hold only one item after this part of +% the algorithm has acted. +% After this is done we save the info-numbers given by |\botmark| +% as the info-numbers of the last page, so that they are available next time. +% +% \item +% Putting a mark into the galley therefore means to put its info to the +% right of the corresponding queue, increment the current info-number for +% \meta{type} by one and putting a \TeX{} mark into the galley holding the +% current info-numbers for all \meta{types}. +% +% \end{itemize} +% +% +% \subsection{Restrictions} +% +% One restriction in using this algorithm without further refinements +% is that for every \meta{type} there will be an upper limit of marks allowed +% within one document. This upper limit is given by |\maxdimen| which is +% probably high enough to ignore it, but it could be improved by resetting +% the info numbers whenever all marks have found their way onto the +% current page. +% +% Another restriction is that one better not changes from linearily +% processing the data for the main galley, or, if one modifies that +% processing one needs to carefully adjust the data structures for the +% marks as well. The problem being that the individual marks within a +% preprocessed galley will stay there forever (and thus can be parsed +% several times), the external data structures, e.g., the plists and +% the sequences however need manual corrections in that case. +% +% \subsection{Implementation} +% +% The original implementation was done on a portable PC in a train +% sometime in 1992/93 and is just a straight implementation of the +% above algorithm using plists to hold the current and the last +% info-numbers. The whole stuff could be done much better by analysing +% the algorithm combining common parts (a lot of thing have be done +% twice, etc.) and recoding the rest in a better way. +% +% The implementation below is more or less a straight adaption +% of that code, so it still needs a rewrite one day. It is based on +% modules implementing ``queues'', ``property lists'', and ``quarks'' +% most of which have been published as experimental code with a +% slightly different surface syntax, i.e., as \texttt{l3seq.sty}, +% \texttt{l3prop.sty}, and \texttt{l3quark.sty}. +% +% New stuff: +% \begin{macrocode} +\RequirePackage{ldcsetup} +\IgnoreWhiteSpace +% \end{macrocode} +% +% \begin{macrocode} +\long\def\@firstofthree#1#2#3{#1} +\long\def\@secondofthree#1#2#3{#2} +\long\def\@thirdofthree#1#2#3{#3} +% \end{macrocode} +% +% \begin{macrocode} +\def \tlp@to@str@N {\expandafter \tlp@to@str@aux \meaning} +\def \tlp@to@str@aux #1>{} +\def \tlp@to@str@c #1 {\expandafter \tlp@to@str@N \csname#1\endcsname} +% \end{macrocode} +% +% +% +% +% +% \subsection{Commands for manipulating queues} +% +% \begin{macro}{\trace@queue} +% \begin{macro}{\trace@queue@internal} +% \begin{macro}{\tracingqueues} +% \begin{macrocode} +%<*trace> +\def\trace@queue#1{\ifnum \tracingqueues > \z@ + \typeout{Queues:~ #1~ \on@line}\fi} +\def\trace@queue@internal#1{\ifnum\tracingqueues>\@ne + \typeout{Queues:~ #1~ \on@line}\fi} +\newcount\tracingqueues +%</trace> +% \end{macrocode} +% \end{macro} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\queue@new@c} +% \begin{macrocode} +\def\queue@new@c#1{\@namedef{#1}{}} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\queue@gadd@Nn} +% \begin{macrocode} +\def\queue@gadd@Nn#1#2{\expandafter\gdef\expandafter#1\expandafter + {#1\queue@elt#2\queue@eelt} +%<*trace> + \trace@queue@internal{add~ `#2'~ to~ queue~ \string#1} +%</trace> +} +% \end{macrocode} +% \end{macro} +% +% +% \begin{macro}{\queue@gadd@cn} +% \begin{macrocode} +\def\queue@gadd@cn#1{\expandafter\queue@gadd@Nn\csname#1\endcsname} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\queue@top@NN} +% \begin{macrocode} +\def\queue@top@NN#1#2{ + \queue@empty@err@N#1 + \expandafter\queue@top@split@w#1\q@stop{\def#2} +%<*trace> + \trace@queue@internal{top~ of~ queue~\string#1:~`\tlp@to@str@N#2'} +%</trace> +} +% \end{macro} +% +% \begin{macro}{\queue@top@split@w} +\def\queue@top@split@w\queue@elt#1\queue@eelt#2\q@stop#3{#3{#1}} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\queue@top@cN} +% \begin{macrocode} +\def\queue@top@cN#1{\expandafter\queue@top@NN\csname#1\endcsname} +% \end{macrocode} +% \end{macro} +% +% +% +% \begin{macro}{\queue@pop@aux@nnNN} +% \begin{macro}{\queue@pop@aux@w} +% \begin{macrocode} +\def \queue@pop@aux@nnNN #1#2#3{ + \queue@empty@err@N #3 + \expandafter\queue@pop@aux@w #3\q@stop #1#2#3} +\def \queue@pop@aux@w \queue@elt#1\queue@eelt + #2\q@stop #3#4#5#6{#3#5{#2}#4#6{#1}} +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% +% \begin{macro}{\queue@gpop@NN} +% \begin{macrocode} +\def \queue@gpop@NN #1#2{\queue@pop@aux@nnNN \gdef \def #1 #2 +%<*trace> + \trace@queue@internal{pop~ of~ queue~\string#1:~`\tlp@to@str@N #2'} +%</trace> +} +% \end{macrocode} +% \end{macro} +% +% +% \begin{macro}{\queue@gpop@cN} +% \begin{macrocode} +\def \queue@gpop@cN #1{\expandafter\queue@gpop@NN\csname#1\endcsname} +% \end{macrocode} +% \end{macro} +% +% +% \begin{macro}{\queue@empty@err@N} +% \begin{macrocode} +\def\queue@empty@err@N #1{\ifx#1\@empty \ERROR \fi} +% \end{macrocode} +% \end{macro} +% +% +% +% +% +% +% +% +% +% \subsection {Quarks} +% +% A quark is a control sequence that expands into itself@ |\def| +% |\foo{\foo}|. Quarks provide a cheap way of generating distinct +% constants. Also, they permit the following ingenious trick: when +% you pick up a token in a temporary, and you want to know whether you +% have picked up a particular quark, all you have to do is compare the +% temporary to the quark using |\ifx|. +% +% \begin{macro}{\quark@new@N} +% Allocate a new quark. +% \begin{macrocode} +\def \quark@new@N #1{\def #1{#1}} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\q@stop} +% \begin{macro}{\q@no@value} +% \begin{macro}{\q@nil} +% |\q@stop| is often used as a marker in parameter text, +% |\q@no@value| is the canonical missing value, and |\q@nil| +% represents a nil pointer in some data structures. +% \begin{macrocode} +\quark@new@N \q@stop +\quark@new@N \q@no@value +\quark@new@N \q@nil +% \end{macrocode} +% \end{macro} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\q@error} +% \begin{macro}{\q@mark} +% We need two additional quarks. |\q@error| delimits the end of +% the computation for purposes of error recovery. |\q@mark| is +% used in parameter text when we need a scanning boundary that is +% distinct from |\q@stop|. +% \begin{macrocode} +\quark@new@N\q@error +\quark@new@N\q@mark +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% +% \begin{macro}{\quark@if@no@value@NTF} +% \begin{macro}{\quark@if@no@value@NF} +% \begin{macro}{\quark@if@no@value@nTF} +% \begin{macro}{\quark@if@no@value@nT} +% \begin{macro}{\quark@if@no@value@nF} +% Here we test if we found a special quark as the first argument. +% The argument might contain an arbitrary list of tokens, therefore +% we have to wrap it up in a token list pointer. +% \begin{macrocode} +\def \quark@if@no@value@NTF #1{ +% \end{macrocode} +% We better start with |\q@no@value| as the first argument since +% the whole thing may otherwise loop if |#1| is wrongly given +% a string like |aabc| instead of a single token.\footnote{It may +% still loop in special circumstances however!} +% \begin{macrocode} + \ifx\q@no@value#1 + \expandafter\@firstoftwo + \else \expandafter\@secondoftwo \fi} +% \end{macrocode} +% It would be possible to speed up the following commands by +% providing individual implementations similar to the one above. +% Should perhaps be done if they are used often! +% \begin{macrocode} +\def \quark@if@no@value@NF #1{\quark@if@no@value@NTF {#1}\@empty} +\def \quark@if@no@value@nTF #1{\gdef \@gtempa {#1} + \quark@if@no@value@NTF\@gtempa} +\def \quark@if@no@value@nF #1{\quark@if@no@value@nTF {#1}\@empty} +\def \quark@if@no@value@nT #1#2{\quark@if@no@value@nTF {#1} + {#2}\@empty} +% \end{macrocode} +% \end{macro} +% \end{macro} +% \end{macro} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\quark@if@nil@NTF} +% A function to check for the presence of |\q@nil|. +% \begin{macrocode} +\def\quark@if@nil@NTF#1{ + \ifx#1\q@nil + \expandafter\@firstoftwo + \else + \expandafter\@secondoftwo\fi} +% \end{macrocode} +% \end{macro} +% +% +% +% +% \subsection{Commands for manipulating property lists} +% +% +% \begin{macro}{\prop@new@N} +% \begin{macrocode} +\def \prop@new@N #1{\def #1{}} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\prop@put@NNn} +% \begin{macro}{\prop@gput@NNn} +% \begin{macro}{\prop@gput@NNo} +% \begin{macro}{\prop@gput@cco} +% \begin{macro}{\prop@gput@ccn} +% \begin{macrocode} +\long\def \prop@put@NNn #1#2{\prop@split@aux@NNn + #1#2{\prop@put@aux@w {\def #1}#2}} +\long\def \prop@gput@NNn #1#2{\prop@split@aux@NNn + #1#2{\prop@put@aux@w {\gdef #1}#2}} +% missing commands for galley stuff... +\def \prop@gput@NNo #1#2#3{ + \expandafter\prop@gput@NNn \expandafter #1 \expandafter + #2 \expandafter { #3 } } +\def \prop@gput@cco #1#2#3{ + \expandafter\prop@gput@NNn \csname #1\expandafter\endcsname + \csname #2\expandafter\endcsname + \expandafter { #3 } } +\def \prop@gput@ccn #1#2{ + \expandafter\prop@gput@NNn \csname #1\expandafter\endcsname + \csname #2\endcsname + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% \end{macro} +% \end{macro} +% \end{macro} +% +% +% \begin{macro}{\prop@put@aux@w} +% \begin{macrocode} +\long\def \prop@put@aux@w #1#2#3#4#5#6{ + \quark@if@no@value@nTF {#4} + {#1{#2{#6}#3}} + {\def\tmp@w ##1#2\q@no@value {#1{#3#2{#6}##1}} + \tmp@w #5}} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\prop@split@aux@NNn} +% \begin{macrocode} +\long\def \prop@split@aux@NNn #1#2#3{ + \def\tmp@w ##1#2##2##3\q@stop {#3{##1}{##2}{##3}} +% ^ ^ needed! + \expandafter\tmp@w #1#2\q@no@value \q@stop} +% \end{macrocode} +% \end{macro} +% +% +% \begin{macro}{\prop@get@NNN} +% \begin{macrocode} +\long\def \prop@get@NNN #1#2{\prop@split@aux@NNn + #1#2\prop@get@aux@w} +% \end{macrocode} +% \end{macro} +% +% +% \begin{macro}{\prop@get@aux@w} +% \begin{macrocode} +\long\def \prop@get@aux@w #1#2#3#4{\def#4{#2}} +% \end{macrocode} +% \end{macro} +% +% +% \begin{macro}{\prop@map@funct@Nn} +% \begin{macrocode} +\let \prop@map@funct@Nn \@gobbletwo +% \end{macrocode} +% \end{macro} +% +% +% \begin{macro}{\prop@map@NN} +% \begin{macrocode} +\def \prop@map@NN #1#2{ + \let \prop@map@funct@Nn #2 + \expandafter\prop@map@aux@w #1\q@stop \q@stop} +% \end{macrocode} +% \end{macro} +% +% +% \begin{macro}{\prop@map@aux@w} +% \begin{macrocode} +\def \prop@map@aux@w #1#2{ + \ifx #1\q@stop \else + \prop@map@funct@Nn #1{#2} + \expandafter\prop@map@aux@w + \fi} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\prop@map@cN} +% \begin{macrocode} +\def \prop@map@cN #1{ + \expandafter \prop@map@NN \csname #1\endcsname } +% \end{macrocode} +% \end{macro} +% +% +% +% +% +% +% +% \subsection{Commands for manipulating marks} +% +% +% +% \begin{macro}{\trace@mark} +% \begin{macro}{\trace@mark@internal} +% \begin{macro}{\tracingmarks} +% Tracing is done when |\tracingmarks| is positive. +% \begin{macrocode} +%<*trace> +\def\trace@mark#1{\ifnum \tracingmarks > \z@ + \typeout{Marks:~ #1~ \on@line}\fi} +\def\trace@mark@internal#1{\ifnum\tracingmarks>\@ne + \typeout{Marks:~ #1}\fi} +\newcount\tracingmarks +%</trace> +% \end{macrocode} +% \end{macro} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\mark@new} +% Defines a new mark label and retrieval token list pointer. +% \begin{macrocode} +\def\mark@new#1{ +%<*trace> + \trace@mark + {new~mark:~\string#1} +%</trace> +% \end{macrocode} +% We make sure that the argument is still free and allocate the +% corresponding queue. To avoid problems with the use of such tlp's +% when they are used before the first |\mark@update@structure| we initialize +% them in a way that |\mark@previous| and the like will accept them even +% then. +% \begin{macrocode} + \newcommand* #1 {{}{}{}} + \queue@new@c{\string#1@seq} +% \end{macrocode} +% The last info-number for this type will be set to |1| This value +% is actually arbitrary and we could use |-\maxdimen+1| to get the +% range doubled. +% \begin{macrocode} + \prop@gput@NNn\mark@last@plist#1{1} +% \end{macrocode} +% More important is that the starting value for the current +% info-number is one less then the one used above. +% \begin{macrocode} + \prop@gput@NNn\mark@curr@plist#1{0} +% \end{macrocode} +% We now put the very first mark of this type in. This mark will be +% empty. This will initialize the queue (now holding the empty previous +% mark) increment the current info number, so that last and current are +% now equal and also puts a \TeX{} mark into the galley will the +% additional type present. +% \begin{macrocode} + \mark@put@Nn#1{}% +% \end{macrocode} +% \begin{macrocode} + \expandafter\g@addto@macro\expandafter\mark@save@state\expandafter{% + \expandafter\global\expandafter\let + \csname saved\string#1@seq\expandafter\endcsname + \csname\string#1@seq\endcsname} + \expandafter\g@addto@macro\expandafter\mark@restore@state@internal\expandafter{% + \expandafter\global\expandafter\let + \csname\string#1@seq\expandafter\endcsname + \csname saved\string#1@seq\endcsname} +} +% \end{macrocode} +% \end{macro} +% +% +% +% \begin{macro}{\mark@save@state} +% \begin{macro}{\mark@restore@state@internal} +% Save and restore the current state of the mark data +% structure. The commands will be extended by |\mark@new|. They are +% needed if part of the main galley is being reused or several +% times parsed. +% \begin{macrocode} +\def\mark@save@state{% + \global\let\saved@mark@curr@plist\mark@curr@plist + \global\let\saved@mark@last@plist\mark@last@plist} +\def\mark@restore@state@internal{% + \global\let\mark@curr@plist\saved@mark@curr@plist + \global\let\mark@last@plist\saved@mark@last@plist} +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\mark@restore@state} +% |\mark@restore@state| will restore the state of the mark +% mechanism to the one saved by |\mark@save@state|. It has to be +% called inside an output routine and as it needs an output routine +% of its own to restore the |\mark| status of the bottom mark (so +% that \TeX{} correctly updates the mark registers in case it +% doesn't find a mark in box 255) it has an argument which is +% executed inside that output routine to regain control. +% +% The code in the argument has to set |\output| to a new output +% routine! If not you are in trouble. +% +% \begin{macrocode} +\def\mark@restore@state#1{% +%<*trace> + \@tracepush{mark@restore@state} +%</trace> +% \end{macrocode} +% We first restore the external data structures by calling +% |\mark@restore@sate@internal|. Then we have to ensure that \TeX's +% idea of what the current |\botmark| is, corresponds to what it +% was when we saved the state. Back then it was the contents of +% |\mark@last@plist| so we are now adding an empty box and then +% mark with is contents +% onto the MVL followed by a penalty that ensures we trigger the +% output routine and then specify a tiny little output routine +% whose sole purpose is to get that mark processed. +% \begin{macrocode} + \mark@restore@state@internal + \hbox{}% +% \end{macrocode} +% We have to protect |\mark@last@plist| from expanding too far +% inside the |\mark| so we first put it into a token register +% before applying |\mark|. +% \begin{macrocode} + \@temptokena\expandafter{\mark@last@plist}% +%<*trace> + \trace@mark@internal{restoring~ botmark~ \the\@temptokena}% +%</trace> + \mark + {\the\@temptokena} + \penalty-20203\relax +% \end{macrocode} +% We are not setting |\vsize| assuming its positive. So the moment +% we return from the current output routine (we are hopefully in +% right now) we should very very soon find the above penalty and +% then trigger the output routine we are about to define now. +% +% In that output routine we have a quick test for the +% |\outputpenalty| just to ensure that we really grabbed what we +% are supposed to grab. Then we throw away the contents of box 255 +% since all we wanted todo is to get |\botmark| set back to the +% value of our mark above. Finally we execute whatever got passed +% along as argument one to regain control. Since current |\output| +% has a rather funny definition the code in that argument better +% change that back to something that does a little bit more +% typesetting. +% \begin{macrocode} + \global\output{% +%<*trace> + \@tracepush{mark@restore@state@or} +%</trace> + \ifnum-20203=\outputpenalty\else \ERROR \fi + \global\setbox\@cclv\box\voidb@x + #1% +%<*trace> + \@tracepop{mark@restore@state@or} +%</trace> + }% +%<*trace> + \@tracepop{mark@restore@state} +%</trace> +} +% \end{macrocode} +% \end{macro} +% +% +% \begin{macro}{\mark@put@Nn} +% To put a mark into the current horizontal or vertical \TeX{} list +% we first update |\mark@curr@plist| and then put its value into the +% mark without any further expansion. (The code could be +% optimized!) +% \begin{macrocode} +%<-trace>\def\mark@put@Nn#1{% % wtest hack } +%<*trace> +\def\mark@put@Nn#1#2{ + \def\l@tmpa@tlp{#2} + \trace@mark + {set~\string#1~<-~\tlp@to@str@N\l@tmpa@tlp} +%</trace> +% \end{macrocode} +% First we have to update the current info number for this type. The +% code is a bit complicated because we have to get the number from the +% the plist update it and then put it back. If we would keep the numbers +% differently this could be improved, probably at the cost of more macro +% names. +% \begin{macrocode} + \@temptokena\expandafter{\mark@curr@plist} + \prop@get@NNN\mark@curr@plist#1\@tempa +%<*debug> + \ifx\q@no@value\@tempa + \ERROR + \fi +%</debug> + \@tempcnta\@tempa + \advance\@tempcnta\@ne + \expandafter + \prop@gput@NNn\expandafter\mark@curr@plist\expandafter#1\expandafter + {\the\@tempcnta} +% \end{macrocode} +% Now we want to put this plist into a \TeX{} mark. We need a +% one-level expansion, otherwise our pkeys would expand which would +% produce chaos. So we save it in a toks register. +% \begin{macrocode} + \@temptokena\expandafter{\mark@curr@plist} + \mark + {\the\@temptokena} +% \end{macrocode} +% Finally we shouldn't forget to put the info at the right of the +% corresponding queue. +% Without tracing we can omit the second argument to +% this function. +% \begin{macrocode} +%<*trace> + \queue@gadd@cn{\string#1@seq}{#2} +%</trace> +%<-trace> \queue@gadd@cn{\string#1@seq}% +} +% \end{macrocode} +% \end{macro} +% +% +% +% +% \begin{macro}{\mark@put@Nnn} +% \begin{macrocode} +\def\mark@put@Nnn#1#2#3{ + \mark@put@Nn#1{#2#3}} +% \end{macrocode} +% \end{macro} +% +% +% +% +% \begin{macro}{\mark@update@structure} +% This function is for use in output routines to initialize the marks +% at the beginning. It is only useful after \TeX{} internally has +% updated |\botmark|. +% \begin{macrocode} +\def\mark@update@structure{ +% \end{macrocode} +% We map a function over all keys in |\mark@last@plist|, in other +% words over all types of marks. This routine will set the marks for +% all types. Finally we set the plist |\mark@last@plist| to the +% plist that was stored in |\botmark|, i.e., to the +% info-numbers from this page. +% \begin{macrocode} + \prop@map@NN\mark@last@plist\mark@retrieve@single@Nn + \expandafter\gdef\expandafter\mark@last@plist\expandafter{\botmark} +} +% \end{macrocode} +% \end{macro} +% +% +% +% \begin{macro}{\mark@retrieve@single@Nn} +% This function will be mapped over the plist containing the info-numbers +% from the last page. This means that |#1| will be the key (which is +% simply our type token list pointer and |#2| is the value, i.e. the +% info-number from the last page for this type. +% \begin{macrocode} +\def\mark@retrieve@single@Nn#1#2{ +%<*trace> + \trace@mark@internal + {queue~for~\string#1~ before:~`\tlp@to@str@c{\string#1@seq}'} +%</trace> +% \end{macrocode} +% We retrieve the info number for this type from |\botmark| +% and store the difference in |\@tempcnta|. +% \begin{macrocode} + \@temptokena\expandafter{\botmark}% +%<*trace> + \trace@mark@internal{picking~ up~ from~ output~ \the\@temptokena}% +%</trace> + \prop@get@NNN\botmark#1\@tempa +%<*debug> + \ifx\q@no@value\@tempa + \ERROR + \fi +%</debug> + \@tempcnta\@tempa + \advance\@tempcnta-#2\relax +%<*trace> + \trace@mark@internal + {found~\the\@tempcnta\space entries~ for~ \string#1~ + (new~\@tempa;~old~#2)} +%</trace> +% \end{macrocode} +% Then we decide what to do depending on its value. +% We use |\@tempa|, |\@tempb|, and |\@tempc| to +% temporarily hold the previous, first and last mark for this type. +% \begin{macrocode} + \ifcase\@tempcnta +% \end{macrocode} +% If there haven't been any new marks we leave the queue alone, +% peeking only at its top element and using it for all three marks. +% \begin{macrocode} + \queue@top@cN{\string#1@seq}\@tempa + \let\@tempb\@tempa + \let\@tempc\@tempa + \or +% \end{macrocode} +% When there was one mark of this type, we pop one item for the +% previous mark of this type, and use the remaining item for first +% and last mark. +% \begin{macrocode} + \queue@gpop@cN{\string#1@seq}\@tempa + \queue@top@cN{\string#1@seq}\@tempb + \let\@tempc\@tempb + \else +% \end{macrocode} +% If we had more than one mark for this type we pop one mark for the +% previous mark of this type, then pop another mark for the first +% mark of this type, then pop all but the last item and use the last +% item as the last mark of this type, keeping it as before on the +% queue. +% \begin{macrocode} + \queue@gpop@cN{\string#1@seq}\@tempa + \queue@top@cN{\string#1@seq}\@tempb + \@whilenum \@tempcnta>\@ne\do + {\advance\@tempcnta\m@ne + \queue@gpop@cN{\string#1@seq} + \@tempc + } + \queue@top@cN{\string#1@seq}\@tempc + \fi +% \end{macrocode} +% After this process all values for previous, first and last mark for +% this type are found so that we can store them in the tlp +% representing this type for further processing. +% \begin{macrocode} + \@temptokena\expandafter{\@tempa} + \@temptokenb\expandafter{\@tempb} + \@temptokenc\expandafter{\@tempc} + \edef#1{{\the\@temptokena}{\the\@temptokenb}{\the\@temptokenc}} +%<*trace> + \trace@mark + {in~output:~\string#1~->~\tlp@to@str@N#1} +% \end{macrocode} +% At this point the queue should show only one item. +% \begin{macrocode} + \trace@mark@internal + {queue~ for~\string#1~after:~`\tlp@to@str@c{\string#1@seq}'} +%</trace> +} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\@temptokenb} +% \begin{macro}{\@temptokenc} +% \begin{macrocode} +\newtoks\@temptokenb +\newtoks\@temptokenc +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% +% \begin{macro}{\mark@curr@plist} +% \begin{macro}{\mark@last@plist} +% Here are the allocations for the two plists used. +% \begin{macrocode} +\prop@new@N\mark@curr@plist +\prop@new@N\mark@last@plist +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% +% +% +% +% +% \begin{macro}{\mark@get@first@N} +% \begin{macro}{\mark@get@last@N} +% \begin{macro}{\mark@get@previous@N} +% To retrieve the first, last or previous page mark, we +% grap the appropriate value stored in the tlp. The marks are stored +% in the tlp in the order previous, first, last mark. These functions +% should be used only in output routines after |\mark@retrieve| has +% acted, otherwise their value will be wrong. They are all fully +% expandable. +% +% Actually, they may bomb when tracing is included and we have +% material that doesn't work corretly within a write. +% \begin{macrocode} +%<*trace> +\def\mark@get@first@N#1{ + \expandafter\@secondofthree#1 + \trace@mark@internal{use~first~\string#1~=~ + `\expandafter\@secondofthree#1'} +} +\def\mark@get@last@N#1{ + \expandafter\@thirdofthree#1 + \trace@mark@internal{use~ last~ \string#1~ =~ + `\expandafter\@thirdofthree#1'} +} +\def\mark@get@previous@N#1{ + \expandafter\@firstofthree#1 + \trace@mark@internal{use~prev~\string#1~ =~ + `\expandafter\@firstofthree#1'} +} +%</trace> +%<-trace>\def\mark@get@first@N{% +%<-trace> \expandafter\@secondofthree} +%<-trace>\def\mark@get@last@N{% +%<-trace> \expandafter\@thirdofthree} +%<-trace>\def\mark@get@previous@N{% +%<-trace> \expandafter\@firstofthree} +% \end{macrocode} +% above version in trace case doesn't work alway! +% \begin{macrocode} +\def\mark@get@first@N{% + \expandafter\@secondofthree} +\def\mark@get@last@N{% + \expandafter\@thirdofthree} +\def\mark@get@previous@N{% + \expandafter\@firstofthree} +% \end{macrocode} +% \end{macro} +% \end{macro} +% \end{macro} +% +% +% \begin{macro}{\DeclareMarkType} +% \begin{macrocode} +\def\DeclareMarkType#1{ + \expandafter\mark@new\csname mark@#1\endcsname} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\PutMark} +% \begin{macrocode} +\def\PutMark#1{ + \@ifundefined{mark@#1}{\ERROR}{} + \expandafter\mark@put@Nn\csname mark@#1\endcsname} +% \end{macrocode} +% \end{macro} +% +% +% \begin{macro}{\PreviousMark} +% \begin{macrocode} +\def\PreviousMark#1{ + \expandafter\mark@get@previous@N\csname mark@#1\endcsname} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\FirstMark} +% \begin{macrocode} +\def\FirstMark#1{ + \expandafter\mark@get@first@N\csname mark@#1\endcsname} +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\LastMark} +% \begin{macrocode} +\def\LastMark#1{ + \expandafter\mark@get@last@N\csname mark@#1\endcsname} +% \end{macrocode} +% \end{macro} +% +% \Finale +% +\endinput +% +% $Log: xmarks.dtx,v $ +% Revision 1.6 2000/06/13 20:47:23 latex3 +% docu update +% inlined quarks code +% |