629 lines
17 KiB
Scheme
629 lines
17 KiB
Scheme
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;;;; -*-Scheme-*-
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;;;;
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;;;; $Revision: 1.14 $
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;;;;
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;;;; `ms' specific definitions for HTML output format
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;;; --------------------------------------------------------------------------
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;;; Options.
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(define-option 'signature 'string "")
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(define-option 'split 'integer 0)
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(define-option 'toc 'boolean #t)
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(define-option 'toc-header 'string "Table of Contents")
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(define-option 'pp-indent 'integer 3)
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(define-option 'footnotes-header 'string "Footnotes")
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(define-option 'footnote-reference 'string "[note %1%]")
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(define-option 'footnote-anchor 'string "[%1%]")
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;;; --------------------------------------------------------------------------
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;;; Predefined strings and number registers.
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(defstring 'Q "``")
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(defstring 'U "''")
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(defstring '- "--") ; em-dash
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(defstring 'MO (substitute "%monthname+%"))
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(defstring 'DY (substitute "%monthname+% %day%, %year%"))
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(defnumreg 'PN #\0)
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;;; --------------------------------------------------------------------------
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;;; General bookkeeping.
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(define split-sections? #f) ; #t if `split' option is positive
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(define-pair abstract abstract? "" "<hr>\n")
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(define-pair title title? "<h1>\n" "</h1>\n")
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(define-pair secthdr secthdr? "<h2>\n" "</h2>\n")
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(define-pair tag-para tag-para? "<dl>\n" "</dl>\n")
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(define-pair list-para list-para? "<ul>\n" "</ul>\n")
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(define-pair quoted quoted? "<blockquote>\n" "</blockquote>\n")
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(define (reset-everything)
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(emit
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(reset-font)
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(center 0)
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(quoted #f)
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(secthdr #f)
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(preform #f)
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(tag-para #f)
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(list-para #f)
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(reset-title-features))
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(header-processor #f))
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(define-nested-pair indent indent-level "<dl><dt><dd>\n" "</dl>\n")
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;;; --------------------------------------------------------------------------
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;;; Manage HTML output files.
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(define HTML-streams '())
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(define (push-HTML-stream file-suffix title-suffix)
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(let* ((docname (option 'document))
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(title (option 'title))
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(t (concat (if title title docname) title-suffix))
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(fn (if file-suffix (concat docname file-suffix ".html") #f))
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(s (if fn (open-output-stream fn) #f)))
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(close-stream (set-output-stream! #f))
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(set-output-stream! s)
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(list-push! HTML-streams fn)
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(emit-HTML-prolog)
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(emit "<title>" (translate t) "</title>\n</head><body>\n")))
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(define (pop-HTML-stream)
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(if (not (eqv? (option 'signature) ""))
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(emit "<p><hr>\n" (substitute (option 'signature))) #\newline)
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(emit "</body>\n</html>\n")
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(list-pop! HTML-streams)
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(close-stream (set-output-stream! #f))
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(if (and (not (null? HTML-streams)) (car HTML-streams))
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(set-output-stream! (append-output-stream (car HTML-streams)))))
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;;; --------------------------------------------------------------------------
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;;; Callback procedure called by hyper.scm when creating hypertext anchor.
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(define (query-anchor request label)
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(lambda (op)
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(case op
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(allowed? #t)
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(emit-anchor? #t)
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(filename
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(if (not (stream-file? (output-stream)))
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(car HTML-streams)
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(stream-target (output-stream)))))))
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;;; --------------------------------------------------------------------------
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;;; Generate hypertext reference and anchor.
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(define (make-href type index contents)
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(let* ((docname (option 'document))
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(file
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(case type
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((section toc) (car HTML-streams))
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(footnote (if split-sections? (concat docname "-notes.html") "")))))
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(format #f "<a href=\"~a#~a~a\">~a" file type index
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(if contents (concat contents "</a>\n") ""))))
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(define (make-anchor type index contents)
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(format #f "<a name=\"~a~a\">~a</a>" type index contents))
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;;; --------------------------------------------------------------------------
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;;; Automatically generated TOC.
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(define auto-toc-entry
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(let ((last-level 0))
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(lambda (anchor entry level labelnum)
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(with-output-appended-to-stream "[autotoc]"
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(emit (repeat-string (- level last-level) "<ul>")
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(repeat-string (- last-level level) "</ul>"))
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(set! last-level level)
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(if (positive? level)
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(emit "<li>" (make-href 'section labelnum anchor) entry))))))
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(define (auto-toc-spill)
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(auto-toc-entry "" "" 0 0)
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(let ((toc (stream->string "[autotoc]")))
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(if (not (eqv? toc ""))
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(emit "<h2>" (substitute (option 'toc-header)) "</h2>\n" toc))))
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;;; --------------------------------------------------------------------------
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;;; Start and exit event functions.
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(defevent 'start 10
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(lambda _
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(set! split-sections? (positive? (option 'split)))
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(let ((docname (option 'document)))
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(if (not (or docname (option 'title)))
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(quit "you must set either document= or title="))
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(if (and split-sections? (not docname))
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(quit "you must set document= for non-zero `split'"))
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(push-HTML-stream (if docname "" #f) ""))))
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(defevent 'exit 10
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(lambda _
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(reset-everything)
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(emit (indent 0))
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(footnote-processor 'spill)
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(do () ((null? (cdr HTML-streams))) (pop-HTML-stream))
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(if (option 'toc)
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(auto-toc-spill))
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(pop-HTML-stream)))
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;;; --------------------------------------------------------------------------
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;;; Title features, abstract.
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(define got-title? #f)
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(define (reset-title-features)
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(concat (title #f)
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(begin1 (if got-title? "<hr>\n" "") (set! got-title? #f))))
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(defmacro 'TL
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(lambda _
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(cond
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(got-title?
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(warn ".TL is only allowed once"))
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(else
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(reset-everything)
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(set! got-title? #t)
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(title #t)))))
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(defmacro 'AU
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(lambda _
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(emit (title #f) "<p>\n" (change-font 2))
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(center 999)))
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(defmacro 'AI
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(lambda _
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(emit (title #f) "<br>\n" (change-font 1))
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(center 999)))
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(defmacro 'AB
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(lambda (AB . args)
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(reset-everything)
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(abstract #t)
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(cond ((null? args)
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"<h2>ABSTRACT</h2>\n<p>\n")
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((string=? (car args) "no")
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"<p>\n")
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(else
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(concat "<h2>" (parse (car args)) "</h2>\n<p>\n")))))
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(defmacro 'AE
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(lambda _
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(cond (abstract? (reset-everything) (abstract #f))
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(else (warn ".AE without preceding .AB")))))
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;;; --------------------------------------------------------------------------
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;;; Numbered sections.
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(define sections (list 0))
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(define (increment-section! s n)
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(if (positive? n)
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(increment-section! (cdr s) (1- n))
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(set-car! s (if (char? (car s))
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(integer->char (modulo (1+ (char->integer (car s))) 256))
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(1+ (car s))))
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(set-cdr! s '())))
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(define (section-number s n)
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(if (zero? n)
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""
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(format #f "~a.~a" (car s) (section-number (cdr s) (1- n)))))
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(define (verify-section-number s)
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(cond ((eqv? s "") #f)
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((string->number s) (string->number s))
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((char-alphabetic? (string-ref s 0)) (string-ref s 0))
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(else #f)))
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(define (numbered-section args)
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(cond
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((null? args)
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(increment-section! sections 0)
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(defstring 'SN (section-number sections 1))
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1)
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((string=? (car args) "S")
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(cond
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((null? (cdr args))
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(warn ".NH with `S' argument but no numbers")
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1)
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(else
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(let ((new (map verify-section-number (cdr args))))
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(if (memq #f new)
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(warn "bad section number in .NH request")
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(set! sections new))
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(defstring 'SN (section-number new (length new)))
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(length new)))))
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(else
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(let ((level (string->number (car args))))
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(if (not level)
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(begin
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(warn "~a is not a valid section level" (car args))
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(set! level 1)))
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(if (< (length sections) level)
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(append! sections (make-list (- level (length sections)) 0)))
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(increment-section! sections (1- level))
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(defstring 'SN (section-number sections level))
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level))))
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(defmacro 'NH
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(lambda (NH . args)
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(reset-everything)
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(emit (indent 0))
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(let ((level (numbered-section args)))
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(if (and split-sections? (<= level (option 'split)))
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(let* ((sect (stringdef 'SN))
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(suff (concat #\- (string-prune-right sect "." sect))))
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(push-HTML-stream suff (concat ", section " sect))))
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(header-processor #t level))))
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(define header-processor
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(let ((stream #f) (inside? #f) (seq 1) (level 0))
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(lambda (enter? . arg)
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(cond
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((and enter? (not inside?))
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(set! level (car arg))
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(set! stream (set-output-stream! (open-output-stream "[header]"))))
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((and inside? (not enter?))
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(close-stream (set-output-stream! stream))
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(let ((hdr (stream->string "[header]"))
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(sectno (stringdef 'SN)))
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(cond
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((and split-sections? (option 'toc))
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(auto-toc-entry (concat sectno #\space) hdr level seq)
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(emit "<h2>" (make-anchor 'section seq sectno)))
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(else
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(emit "<h2>" sectno)))
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(emit nbsp hdr "</h2>\n")
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(++ seq))))
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(set! inside? enter?)
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"")))
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;;; --------------------------------------------------------------------------
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;;; Font switching and related requests.
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(define (with-font font . args)
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(let ((old current-font))
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(cond
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((null? args)
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(concat (change-font font) #\newline))
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((null? (cdr args))
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(concat (change-font font) (parse (car args) #\newline)
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(change-font old)))
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(else
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(concat (change-font font) (parse (car args)) (change-font old)
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(parse (cadr args) #\newline))))))
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(defmacro 'I with-font)
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(defmacro 'B with-font)
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(defmacro 'R with-font)
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(defmacro 'UL (lambda (UL) (with-font "I"))) ; <u> doesn't work
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(defmacro 'SM
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(lambda (SM . words)
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(if (null? words) "" (parse (apply spread words) #\newline))))
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(defmacro 'LG (requestdef 'SM))
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;;; --------------------------------------------------------------------------
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;;; Indented paragraph with optional label.
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(define (indented-paragraph IP . arg)
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(define (non-tagged? s)
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(or (null? s) (member (car s) '("\\(bu" "\\(sq" "\\-"))))
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(emit (reset-font) (secthdr #f) (reset-title-features))
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(header-processor #f)
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(cond
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(preform?
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(surprise ".IP inside .nf/.fi")
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(if (not (null? arg)) (concat (parse (car arg)) #\newline) #\newline))
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(tag-para?
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(if (null? arg)
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"<dt><dd><p>\n"
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(concat "<dt>" (parse (car arg)) "<dd>\n")))
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(list-para?
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(cond
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((non-tagged? arg)
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"<li>\n")
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(else
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(warn ".IP `arg' in a list that was begun as non-tagged")
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(concat "<li>" (parse (car arg)) "<br>\n"))))
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((non-tagged? arg)
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(concat (list-para #t) (indented-paragraph IP)))
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(else
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(concat (tag-para #t) (indented-paragraph IP (car arg))))))
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(defmacro 'IP indented-paragraph)
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;;; --------------------------------------------------------------------------
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;;; Relative indent.
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||
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(define (relative-indent request . _)
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(if preform?
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(surprise ".RS/.RE inside .nf/.fi"))
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(emit (reset-font) (tag-para #f) (list-para #f))
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(with-preform-preserved
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(indent (if (string=? request "RS") '+ '-))))
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(defmacro 'RS relative-indent)
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(defmacro 'RE relative-indent)
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|
;;; --------------------------------------------------------------------------
|
||
|
|
;;; Displays.
|
||
|
|
|
||
|
|
(define display-saved-font #f)
|
||
|
|
(define inside-display? #f)
|
||
|
|
(define indented-display? #f)
|
||
|
|
|
||
|
|
(define (display-start type)
|
||
|
|
(if (or (string=? type "C") (string=? type "B"))
|
||
|
|
(begin
|
||
|
|
(warn "display type ~a not supported (using I)" type)
|
||
|
|
(set! type "I")))
|
||
|
|
(cond
|
||
|
|
((or (not (= (string-length type) 1))
|
||
|
|
(not (memq (string-ref type 0) '(#\I #\L #\C #\B))))
|
||
|
|
(warn "illegal display type `~a'" type))
|
||
|
|
(inside-display?
|
||
|
|
(warn "nested display ignored"))
|
||
|
|
(preform?
|
||
|
|
(warn "display inside .nf/.fi ignored"))
|
||
|
|
(else
|
||
|
|
(set! display-saved-font current-font)
|
||
|
|
(emit (reset-font))
|
||
|
|
(set! indented-display? (string=? type "I"))
|
||
|
|
(if indented-display?
|
||
|
|
(emit (indent '+)))
|
||
|
|
(set! inside-display? #t)
|
||
|
|
(preform #t))))
|
||
|
|
|
||
|
|
(defmacro 'DS
|
||
|
|
(lambda (DS . args)
|
||
|
|
(display-start (if (null? args) "I" (car args)))))
|
||
|
|
|
||
|
|
(defmacro 'ID (lambda _ (display-start "I")))
|
||
|
|
(defmacro 'LD (lambda _ (display-start "L")))
|
||
|
|
(defmacro 'CD (lambda _ (display-start "C")))
|
||
|
|
(defmacro 'BD (lambda _ (display-start "B")))
|
||
|
|
|
||
|
|
(defmacro 'DE
|
||
|
|
(lambda _
|
||
|
|
(cond
|
||
|
|
((not inside-display?)
|
||
|
|
(warn ".DE without matching display start"))
|
||
|
|
(else
|
||
|
|
(set! inside-display? #f)
|
||
|
|
(emit
|
||
|
|
(with-font-preserved
|
||
|
|
(preform #f)
|
||
|
|
(if indented-display? (indent '-) ""))
|
||
|
|
(change-font display-saved-font))
|
||
|
|
""))))
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;;; --------------------------------------------------------------------------
|
||
|
|
;;; Footnotes.
|
||
|
|
|
||
|
|
;; Generating \[***] for \** allows us to defer creating the anchor from
|
||
|
|
;; string expansion time to output time. Otherwise we couldn't use <...>.
|
||
|
|
|
||
|
|
(defstring '* "\\[***]")
|
||
|
|
|
||
|
|
(define **-count 0)
|
||
|
|
|
||
|
|
(defspecial '***
|
||
|
|
(lambda _
|
||
|
|
(++ **-count)
|
||
|
|
(footnote-anchor (substitute (option 'footnote-reference)
|
||
|
|
(number->string **-count)))))
|
||
|
|
|
||
|
|
(define next-footnote 0)
|
||
|
|
|
||
|
|
(define (footnote-anchor sym)
|
||
|
|
(++ next-footnote)
|
||
|
|
(with-font-preserved
|
||
|
|
(concat (change-font 1) (make-href 'footnote next-footnote sym))))
|
||
|
|
|
||
|
|
;; New request to generate a footnote anchor; an alternative to \**.
|
||
|
|
;; Should be followed by .FS. Do not use `.FA \**'.
|
||
|
|
|
||
|
|
(defmacro 'FA
|
||
|
|
(lambda (FA arg) (footnote-anchor (parse arg))))
|
||
|
|
|
||
|
|
|
||
|
|
(define footnote-processor
|
||
|
|
(let ((stream #f) (inside? #f))
|
||
|
|
(lambda (op . arg)
|
||
|
|
(case op
|
||
|
|
(begin
|
||
|
|
(cond
|
||
|
|
(inside?
|
||
|
|
(surprise "nested .FS"))
|
||
|
|
(else
|
||
|
|
(set! inside? #t)
|
||
|
|
(set! stream (set-output-stream!
|
||
|
|
(append-output-stream "[footnotes]")))
|
||
|
|
(emit "<p>\n")
|
||
|
|
(let ((anchor
|
||
|
|
(cond ((not (null? arg))
|
||
|
|
(parse (car arg)))
|
||
|
|
((positive? **-count)
|
||
|
|
(substitute (option 'footnote-anchor)
|
||
|
|
(number->string **-count)))
|
||
|
|
(else #f))))
|
||
|
|
(if anchor
|
||
|
|
(emit "<b>" (make-anchor 'footnote next-footnote anchor)
|
||
|
|
"</b>" nbsp))))))
|
||
|
|
(end
|
||
|
|
(cond
|
||
|
|
(inside?
|
||
|
|
(set! inside? #f)
|
||
|
|
(close-stream (set-output-stream! stream)))
|
||
|
|
(else (warn ".FE without matching .FS"))))
|
||
|
|
(spill
|
||
|
|
(if inside? (quit "unterminated footnote at end of document"))
|
||
|
|
(let ((contents (stream->string "[footnotes]"))
|
||
|
|
(hdr (substitute (option 'footnotes-header))))
|
||
|
|
(cond
|
||
|
|
((not (eqv? contents ""))
|
||
|
|
(if split-sections?
|
||
|
|
(push-HTML-stream "-notes" ", footnotes"))
|
||
|
|
(cond ((and split-sections? (option 'toc))
|
||
|
|
(auto-toc-entry hdr "" 1 0)
|
||
|
|
(emit "<h2>" (make-anchor 'section 0 hdr)))
|
||
|
|
(else (emit "<h2>" hdr)))
|
||
|
|
(emit "</h2>\n" contents))
|
||
|
|
((positive? next-footnote)
|
||
|
|
(warn "footnote anchor used, but no .FS"))))))
|
||
|
|
"")))
|
||
|
|
|
||
|
|
(defmacro 'FS
|
||
|
|
(lambda (FS . arg)
|
||
|
|
(apply footnote-processor 'begin arg)))
|
||
|
|
|
||
|
|
(defmacro 'FE
|
||
|
|
(lambda _ (footnote-processor 'end)))
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;;; --------------------------------------------------------------------------
|
||
|
|
;;; TOC macros.
|
||
|
|
|
||
|
|
(define toc-processor
|
||
|
|
(let ((stream #f) (inside? #f) (seq 1))
|
||
|
|
(lambda (op . arg)
|
||
|
|
(case op
|
||
|
|
(begin
|
||
|
|
(cond
|
||
|
|
(inside?
|
||
|
|
(surprise "nested .XS"))
|
||
|
|
(else
|
||
|
|
(set! inside? #t)
|
||
|
|
(emit (make-anchor 'toc seq " ") #\newline)
|
||
|
|
(set! stream (set-output-stream! (append-output-stream "[toc]")))
|
||
|
|
(if (>= (length arg) 2)
|
||
|
|
(emit
|
||
|
|
(repeat-string
|
||
|
|
(get-hunits (parse-expression (cadr arg) 0 #\n)) nbsp)))
|
||
|
|
(if (option 'document)
|
||
|
|
(emit (make-href 'toc seq #f)))
|
||
|
|
(++ seq))))
|
||
|
|
(end
|
||
|
|
(cond
|
||
|
|
(inside?
|
||
|
|
(set! inside? #f)
|
||
|
|
(if (option 'document) (emit "</a>\n"))
|
||
|
|
(emit "<br>\n")
|
||
|
|
(close-stream (set-output-stream! stream)))
|
||
|
|
(else (warn ".XE or .XA without matching .XS"))))
|
||
|
|
(spill
|
||
|
|
(if inside? (quit "unterminated .XE"))
|
||
|
|
(if (or (null? arg) (not (string=? (car arg) "no")))
|
||
|
|
(emit "<h2>Table of Contents</h2>\n"))
|
||
|
|
(emit (stream->string "[toc]"))))
|
||
|
|
"")))
|
||
|
|
|
||
|
|
(defmacro 'XS
|
||
|
|
(lambda (XS . arg)
|
||
|
|
(apply toc-processor 'begin arg)))
|
||
|
|
|
||
|
|
(defmacro 'XE (lambda _ (toc-processor 'end)))
|
||
|
|
(defmacro 'XA (lambda _ (toc-processor 'end) (toc-processor 'begin)))
|
||
|
|
|
||
|
|
(defmacro 'PX
|
||
|
|
(lambda (PX . arg)
|
||
|
|
(apply toc-processor 'spill arg)))
|
||
|
|
|
||
|
|
|
||
|
|
;;; --------------------------------------------------------------------------
|
||
|
|
;;; Paragraphs of various kinds.
|
||
|
|
|
||
|
|
(define-macro (define-paragraph request . body)
|
||
|
|
`(defmacro ,request (lambda _ (reset-everything) ,@body)))
|
||
|
|
|
||
|
|
(define-paragraph 'LP "<p>\n")
|
||
|
|
(define-paragraph 'PP (concat "<p>\n"
|
||
|
|
(repeat-string (option 'pp-indent) nbsp)))
|
||
|
|
(define-paragraph 'QP (quoted #t))
|
||
|
|
(define-paragraph 'SH (secthdr #t))
|
||
|
|
(define-paragraph 'RT)
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;;; --------------------------------------------------------------------------
|
||
|
|
;;; Requests that must be ignored, either because the function cannot
|
||
|
|
;;; be expressed in HTML or because they assume a page structure.
|
||
|
|
|
||
|
|
(defmacro 'AM "") ; better accents
|
||
|
|
(defmacro 'BT "") ; bottom title
|
||
|
|
(defmacro 'CM "") ; cut mark between pages
|
||
|
|
(defmacro 'CT "") ; chapter title
|
||
|
|
(defmacro 'DA "") ; force date at page bottom
|
||
|
|
(defmacro 'EF "") ; even footer
|
||
|
|
(defmacro 'EH "") ; even header
|
||
|
|
(defmacro 'HD "") ; optional page header
|
||
|
|
(defmacro 'KE "") ; keep end
|
||
|
|
(defmacro 'KF "") ; floating keep
|
||
|
|
(defmacro 'KS "") ; keep
|
||
|
|
(defmacro 'ND "") ; no date in footer
|
||
|
|
(defmacro 'NL "") ; reset point size to normal
|
||
|
|
(defmacro 'OF "") ; odd footer
|
||
|
|
(defmacro 'OH "") ; odd header
|
||
|
|
(defmacro 'P1 "") ; print header on 1st page
|
||
|
|
(defmacro 'PT "") ; page title
|
||
|
|
(defmacro 'TM "") ; UCB thesis mode
|
||
|
|
|
||
|
|
(defmacro 'BX ; boxed word
|
||
|
|
(lambda (BX word)
|
||
|
|
(parse word #\newline)))
|
||
|
|
|
||
|
|
(define (multi-column-ignored request . _)
|
||
|
|
(warn "multi-column request .~a not supported" request))
|
||
|
|
|
||
|
|
(defmacro 'MC multi-column-ignored)
|
||
|
|
(defmacro '1C multi-column-ignored)
|
||
|
|
(defmacro '2C multi-column-ignored)
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
;;; --------------------------------------------------------------------------
|
||
|
|
;;; Anachronisms, kludges, etc.
|
||
|
|
|
||
|
|
(defmacro 'UX "UNIX")
|
||
|
|
|
||
|
|
(defmacro 'B1 "<hr>\n")
|
||
|
|
(defmacro 'B2 "<hr>\n")
|