+(define (woff-header paper dir)
+ "TODO:
+ * add (ly:version) to font name
+ * copy woff font with version alongside svg output
+"
+ (set! output-dir dir)
+ (string-append
+ (eo 'defs)
+ (eo 'style '(text . "style/css"))
+ "<![CDATA[
+"
+ (define-fonts paper svg-define-font svg-define-font)
+ "]]>
+"
+ (ec 'style)
+ (ec 'defs)))
+
+(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 (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)))
+
+(define (dump-preview paper stencil filename)
+ (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))
+ (x-extent (ly:stencil-extent stencil X))
+ (y-extent (ly:stencil-extent stencil Y))
+ (left-x (car x-extent))
+ (top-y (cdr y-extent))
+ (device-width (interval-length x-extent))
+ (device-height (interval-length y-extent))
+ (output-scale (* lily-unit->mm-factor unit-length))
+ (svg-width (* output-scale device-width))
+ (svg-height (* output-scale device-height)))
+
+ (if (ly:get-option 'svg-woff)
+ (module-define! (ly:outputter-module outputter) 'paper paper))
+ (dump (svg-begin svg-width svg-height
+ left-x (- top-y) 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))))
+ (ly:outputter-output-scheme outputter
+ `(begin (set! lily-unit-length ,unit-length)
+ ""))
+ (ly:outputter-dump-stencil outputter stencil)
+ (dump (svg-end))
+ (ly:outputter-close outputter)))
+
+
+(define (output-framework 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 "-page-~a" num)))))
+ (for-each
+ (lambda (page)
+ (set! page-number (1+ page-number))
+ (set! filename (format #f "~a~a.svg"
+ basename
+ (file-suffix page-number)))
+ (dump-page paper filename page page-number page-count))
+ page-stencils)))
+
+(define (output-preview-framework basename book scopes fields)
+ (let* ((paper (ly:paper-book-paper book))
+ (systems (relevant-book-systems book))
+ (to-dump-systems (relevant-dump-systems systems)))
+ (dump-preview paper
+ (stack-stencils Y DOWN 0.0
+ (map paper-system-stencil
+ (reverse to-dump-systems)))
+ (format #f "~a.preview.svg" basename))))