/usr/share/gnucash/scm/html-text.scm is in gnucash-common 1:2.6.12-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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;; html-text.scm : generate HTML programmatically, with support
;; for simple style elements.
;; Copyright 2000 Bill Gribble <grib@gnumatic.com>
;;
;; 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 2 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, contact:
;;
;; Free Software Foundation Voice: +1-617-542-5942
;; 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652
;; Boston, MA 02110-1301, USA gnu@gnu.org
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; <html-text> class
;; just plain-old text. some utilities to add markup.
;; markup is done lazily (at rendering time) to allow for various styles.
;; the markup just returns a thunk which you can call later with the
;; doc as arg to get the string out.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(use-modules (gnucash printf))
(define <html-text>
(make-record-type "<html-text>"
'(body style)))
(define gnc:html-text?
(record-predicate <html-text>))
(define gnc:make-html-text-internal
(record-constructor <html-text>))
(define (gnc:make-html-text . body)
(gnc:make-html-text-internal
body
(gnc:make-html-style-table)))
(define gnc:html-text-body
(record-accessor <html-text> 'body))
(define gnc:html-text-set-body-internal!
(record-modifier <html-text> 'body))
(define (gnc:html-text-set-body! txt . rest)
(gnc:html-text-set-body-internal! txt rest))
(define gnc:html-text-style
(record-accessor <html-text> 'style))
(define gnc:html-text-set-style-internal!
(record-modifier <html-text> 'style))
(define (gnc:html-text-set-style! text tag . rest)
(let ((newstyle #f))
(if (and (= (length rest) 2)
(procedure? (car rest)))
(set! newstyle
(apply gnc:make-html-data-style-info rest))
(set! newstyle
(apply gnc:make-html-markup-style-info rest)))
(gnc:html-style-table-set! (gnc:html-text-style text) tag newstyle)))
(define (gnc:html-text-append! text . body)
(gnc:html-text-set-body-internal!
text
(append (gnc:html-text-body text) body)))
(define (gnc:html-markup tag . entities)
(lambda (doc)
(apply gnc:html-text-render-markup
doc
tag
#f
#t
entities)))
(define (gnc:html-markup/attr tag attr . entities)
(lambda (doc)
(apply gnc:html-text-render-markup
doc
tag
attr
#t
entities)))
;; This creates an open html tag which must be explicitly closed later.
(define (gnc:html-markup/open-tag-only tag . entities)
(lambda (doc)
(apply gnc:html-text-render-markup-noclose
doc
tag
#f
#t
entities)))
(define (gnc:html-markup/no-end tag . entities)
(lambda (doc)
(apply gnc:html-text-render-markup
doc
tag
#f
#f
entities)))
(define (gnc:html-markup/attr/no-end tag attr . entities)
(lambda (doc)
(apply gnc:html-text-render-markup
doc
tag
attr
#f
entities)))
;; I'm not entirely pleased about the way this works, but I can't
;; really see a way around it. It still works within the style
;; system, but it flattens out its children's lists prematurely. Has
;; to, to pass them as args to sprintf.
(define (gnc:html-markup/format format . entities)
(lambda (doc)
(apply
sprintf #f format
(map
(lambda (elt)
(let ((rendered-elt
(cond ((procedure? elt)
(elt doc))
((gnc:html-object? elt)
(gnc:html-object-render elt doc))
(#t
(gnc:html-document-render-data doc elt)))))
(cond
((string? rendered-elt)
rendered-elt)
((list? rendered-elt)
(apply string-append
(gnc:html-document-tree-collapse rendered-elt)))
(#t
(format "hold on there podner. form='~s'\n" rendered-elt)
""))))
entities))))
(define (gnc:html-markup-p . rest)
(apply gnc:html-markup "p" rest))
(define (gnc:html-markup-tt . rest)
(apply gnc:html-markup "tt" rest))
(define (gnc:html-markup-em . rest)
(apply gnc:html-markup "em" rest))
(define (gnc:html-markup-b . rest)
(apply gnc:html-markup "b" rest))
(define (gnc:html-markup-i . rest)
(apply gnc:html-markup "i" rest))
(define (gnc:html-markup-h1 . rest)
(apply gnc:html-markup "h1" rest))
(define (gnc:html-markup-h2 . rest)
(apply gnc:html-markup "h2" rest))
(define (gnc:html-markup-h3 . rest)
(apply gnc:html-markup "h3" rest))
(define (gnc:html-markup-br)
(gnc:html-markup/no-end "br"))
(define (gnc:html-markup-hr)
(gnc:html-markup/no-end "hr"))
(define (gnc:html-markup-ul items)
(apply gnc:html-markup "ul"
(map
(lambda (obj)
(gnc:html-markup "li" obj))
items)))
(define (gnc:html-markup-anchor href . rest)
(apply gnc:html-markup/attr
"a"
(string-append "href=\"" href "\"")
rest))
(define (gnc:html-markup-img src . rest)
(gnc:html-markup/attr/no-end
"img"
(with-output-to-string
(lambda ()
(display "src=\"") (display src) (display"\"")
(display " ")
(for-each
(lambda (kvp)
(display (car kvp))
(display "=\"")
(display (cadr kvp))
(display "\" "))
rest)))))
(define (gnc:html-text-render p doc)
(let* ((retval '())
(push (lambda (l) (set! retval (cons l retval)))))
(gnc:html-style-table-compile (gnc:html-text-style p)
(gnc:html-document-style-stack doc))
(gnc:html-document-push-style doc (gnc:html-text-style p))
(for-each
(lambda (elt)
(cond ((procedure? elt)
(push (elt doc)))
(#t
(push (gnc:html-document-render-data doc elt)))))
(gnc:html-text-body p))
(gnc:html-document-pop-style doc)
(gnc:html-style-table-uncompile (gnc:html-text-style p))
retval))
;; XXX It would be better to merge this with the original html-text-render-markup below it,
;; but that would require a fair amount of work to refactor so that it works correctly.
(define (gnc:html-text-render-markup-noclose doc markup attrib end-tag? . entities)
(let* ((retval '())
(push (lambda (l) (set! retval (cons l retval)))))
(push (gnc:html-document-markup-start doc markup end-tag? attrib))
(for-each
(lambda (elt)
(cond ((procedure? elt)
(push (elt doc)))
(#t
(push (gnc:html-document-render-data doc elt)))))
entities)
retval))
(define (gnc:html-text-render-markup doc markup attrib end-tag? . entities)
(let* ((retval '())
(push (lambda (l) (set! retval (cons l retval)))))
(push (gnc:html-document-markup-start doc markup end-tag? attrib))
(for-each
(lambda (elt)
(cond ((procedure? elt)
(push (elt doc)))
(#t
(push (gnc:html-document-render-data doc elt)))))
entities)
(if end-tag?
(push (gnc:html-document-markup-end doc markup)))
retval))
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