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Some temporary notes:
==============================================================================
For reference, here is how some of this can be hacked in jadetex using
sgml-parse:
cat >>jadetex.cfg <<EOF
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% page-number and category-page-number support
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% We need a counter totalpages which truly counts the pages
% shipped out so far (unlike page, which counts something
% like the DSSSL category-page-number).
%
\newcounter{totalpages}
\setcounter{totalpages}{1}
% Wow, changing the LaTeX output routine !
\let\@@outputpage\@outputpage
\def\@outputpage{\@@outputpage\stepcounter{totalpages}}
% Produce an SGML file which can be read by sgml-parse
\newwrite\@dssslindexfile
\immediate\openout\@dssslindexfile=\jobname.index
\begingroup
\catcode`\#=12
\immediate\write\@dssslindexfile
{<!doctype pagelist [^^J %
<!element pagelist - - (node+) >^^J
<!element node - - (firstarea,node*,lastarea) >^^J
<!attlist node id ID #IMPLIED >^^J
<!element (firstarea,lastarea) - - EMPTY >^^J
<!attlist (firstarea,lastarea)^^J
page NUMBER #REQUIRED^^J
category NUMBER #REQUIRED >^^J%
]>^^J%
<pagelist>}
\endgroup
\typeout{Writing DSSSL page number information to \jobname.index.}
\newcounter{elno}
\let\@@Node\Node
\def\Node#1{%
\@@Node{#1}%
\DEBUG{Label \Label}%
\DEBUG{Element \Element}%
\def\pgid{}%
\ifx\Label\@empty
\ifx\Element\@empty\else
\setcounter{elno}{\Element}%
\addtocounter{elno}{1}%
\edef\pgid{ELNO\arabic{elno}}%
\fi
\else
\let\pgid\Label
\fi
\immediate\write\@dssslindexfile
{<node\ifx\pgid\@empty\else\space id="\pgid"\fi>^^J
<firstarea page="\arabic{totalpages}"
category="\arabic{page}">}}
\let\@@endNode\endNode
\def\endNode#1{%
\DEBUG{endNode: \Label, \Element}%
\immediate\write\@dssslindexfile
{ <lastarea page="\arabic{totalpages}"
category="\arabic{page}">^^J</node>}%
\@@endNode{#1}}
\let\@@endFOT\endFOT
\def\endFOT{%
\immediate\write\@dssslindexfile{</pagelist>}%
\immediate\closeout\@dssslindexfile
\@@endFOT}
EOF
Explanation for the TeXagnostics: What this does is write an SGML file
xyz.index (assuming you started with xyz.sgml from which jade -ttex produced
xyz.tex) with the following DTD
<!element pagelist - - (node+) >
<!element node - - (firstarea,node*,lastarea) >
<!attlist node id ID #IMPLIED >
<!element (firstarea,lastarea) - - EMPTY >
<!attlist (firstarea,lastarea)
page NUMBER #REQUIRED
category NUMBER #REQUIRED >
jadetex emits a node element for each node in the FOT (in reality there
are no nodes in the FOT, but the TeXFOTBuilder emits enough information
for jadetex to know which node was current when a FO was created).
The page and category attributes of the firstarea and lastarea elements
contain the values we want to get via
(page-number first-area-of-node: nd)
(page-number last-area-of-node: nd)
(category-page-number first-area-of-node: nd)
(category-page-number last-area-of-node: nd)
if nd is the node in question.
Here is how to define page-number and category-page-number using sgml-parse.
The ugly thing is that the name of the index file is hardcoded. This
could be improved using the -V extensions of OpenJade.
cat >>page-numbers.dsl <<EOF
(define index-sysid "xyz.index")
(define index-page-grove (sgml-parse index-sysid))
(define (page-number #!key first-area-of-node last-area-of-node)
(wrap-generated-object
(if (and first-area-of-node last-area-of-node)
(error "page-number accepts at most one key argument")
(let* ((snl (or first-area-of-node last-area-of-node (current-node)))
(area (if last-area-of-node "LASTAREA" "FIRSTAREA"))
(tid (or (id snl) (string-append "ELNO"
(format-number
(all-element-number snl) "1")))))
(if tid
(string->number
(or (attribute-string
"PAGE" (select-elements
(children (element-with-id tid index-page-grove))
area))
"0"))
(error "page-number currently works only on elements
and nodes with id"))))))
(define (category-page-number #!key first-area-of-node last-area-of-node)
(wrap-generated-object
(if (and first-area-of-node last-area-of-node)
(error "category-page-number accepts at most one key argument")
(let* ((snl (or first-area-of-node last-area-of-node (current-node)))
(area (if last-area-of-node "LASTAREA" "FIRSTAREA"))
(tid (or (id snl) (string-append "ELNO"
(format-number
(all-element-number snl) "1")))))
(if tid
(string->number
(or (attribute-string
"CATEGORY" (select-elements
(children (element-with-id tid index-page-grove))
area))
"0"))
(error "category-page-number currently works only on elements
and nodes with id"))))))
;; I used wrap-generated-object to fake a new type for generated objects.
(define (wrap-generated-object x) (cons 'generated-object x))
(define (generated-object? x)
(and (pair? x) (equal? (car x) 'generated-object)))
(define (unwrap-generated-object x)
(if (generated-object? x)
(cdr x)
(error "generated object required")))
;; Of course we also need some of the DSSSL functions dealing with
;; generated objects.
; This is a *very* partial implementation of general-indirect-sosofo.
(define (general-indirect-sosofo fun #!rest li)
(fun (map unwrap-generated-object li)))
(define (number-indirect-sosofo x #!key (format "1") (add 0) (multiple 1))
(let ((y (unwrap-generated-object x)))
(if (not (number? y))
(error "number-indirect-sosofo: kernel of generated object
not a number")
(let ((n (+ add y)))
(if (= 0 (remainder n multiple))
(literal (format-number n format))
(literal ""))))))
(define (asis-indirect-sosofo x)
(let ((y (unwrap-generated-object x)))
(if (not (sosofo? y))
(error "asis-indirect-sosofo: kernel of generated object
not a sosofo")
y)))
EOF
==============================================================================
|
