Hi Melt: I just solved in this way ( I looked at
https://stackoverflow.com/questions/21816306/guile-scheme-redefine-another-modules-internal-function
for
understanding how a redefinition of a module's function works):
Lot of dependencies to fix as a consequence, but it works:
*****************************************************************************************************
#(use-modules
(guile)
(lily)
(scm page)
(scm paper-system)
(scm output-svg)
(scm clip-region)
(srfi srfi-1)
(srfi srfi-2)
(srfi srfi-13)
(ice-9 regex))
#(define (svg-begin . rest)
(string-append
(eo 'svg #t
'(xmlns . "http://www.w3.org/2000/svg";)
'(xmlns:xlink . "http://www.w3.org/1999/xlink";)
'(version . "1.2")
`(width . ,(ly:format "~2fmm" (first rest)))
`(height . ,(ly:format "~2fmm" (second rest)))
`(viewBox . ,(ly:format "~4f ~4f ~4f ~4f"
(third rest) (fourth rest)
(fifth rest) (sixth rest))))
(eo 'style #t '(text . "style/css"))
"<![CDATA[
tspan { white-space: pre; }
"))
#(define (svg-end)
(ec 'svg))
#(define (style-defs-end)
(string-append
"]]>
"
(ec 'style)))
#(define (woff-header paper dir)
"TODO:
* add (ly:version) to font name
* copy woff font with version alongside svg output
"
(set! output-dir dir)
(define-fonts paper svg-define-font svg-define-font))
#(define (dump-page paper filename page page-number page-count)
(let* ((outputter (ly:make-paper-outputter (open-file filename "wb")
'svg))
(dump (lambda (str) (display str (ly:outputter-port outputter))))
(lookup (lambda (x) (ly:output-def-lookup paper x)))
(unit-length (lookup 'output-scale))
(output-scale (* lily-unit->mm-factor unit-length))
(device-width (lookup 'paper-width))
(device-height (lookup 'paper-height))
(page-width (* output-scale device-width))
(page-height (* output-scale device-height)))
(if (ly:get-option 'svg-woff)
(module-define! (ly:outputter-module outputter) 'paper paper))
(dump (svg-begin page-width page-height
0 0 device-width device-height))
(if (ly:get-option 'svg-woff)
(module-remove! (ly:outputter-module outputter) 'paper))
(if (ly:get-option 'svg-woff)
(dump (woff-header paper (dirname filename))))
(dump (style-defs-end))
(dump (comment (format #f "Page: ~S/~S" page-number page-count)))
(ly:outputter-output-scheme outputter
`(begin (set! lily-unit-length ,unit-length)
""))
(ly:outputter-dump-stencil outputter page)
(dump (svg-end))
(ly:outputter-close outputter)))
%
%
% HERE IS THE OVERRIDE
%
%
#(module-define! (resolve-module '(scm framework-svg)) 'output-framework
(lambda (basename book scopes fields) (let* ((paper (ly:paper-book-paper
book))
(page-stencils (map page-stencil (ly:paper-book-pages book)))
(page-number (1- (ly:output-def-lookup paper 'first-page-number)))
(page-count (length page-stencils))
(filename "")
(file-suffix (lambda (num)
(if (= page-count 1) "" (format #f "-~a" num)))))
(if (ly:get-option 'clip-systems) (clip-system-SVG basename book))
(for-each
(lambda (page)
(set! page-number (1+ page-number))
(set! filename (format #f "~a~a.html"
basename
(file-suffix page-number)))
(dump-page paper filename page page-number page-count))
page-stencils))))
*****************************************************************************************************
Best,
Paolo
On Mon, Dec 23, 2019 at 10:30 AM Malte Meyn <lilyp...@maltemeyn.de> wrote:
>
>
> Am 23.12.19 um 10:19 schrieb Malte Meyn:
> > might have something to do with Scheme modules
>
> The reason for this guess: I copied and changed the definition for
> output-preview-framework and it didn’t work as expected. So I looked
> where this function is called and found the file lily/paper-book.cc. The
> function output-preview-framework isn’t just called directly but the
> name 'output-preview-framework is looked up in a module resolved from
> some string probably containing "svg". I have no idea what LilyPond and
> I are doing here but maybe it’s a hint for someone else searching for a
> solution.
>
>
