;;;;
;;;; source file of the GNU LilyPond music typesetter
;;;;
-;;;; (c) 2006 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+;;;; (c) 2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;; 2006 Nicolas Sceaux <nicolas.sceaux@free.fr>
(define-module (scm layout-page-dump)
#:use-module (srfi srfi-1)
#:use-module (ice-9 pretty-print)
#:use-module (scm paper-system)
#:use-module (scm page)
+ #:use-module (scm layout-page-layout)
#:use-module (lily)
- #:export (write-page-breaks))
-
+ #:export (write-page-breaks
+ ;; utilisties for writing other page dump functions
+ record-tweaks dump-all-tweaks))
(define (record-tweaks what property-pairs tweaks)
(let ((key (ly:output-def-lookup (ly:grob-layout what)
- 'tweak-key
- "tweaks"))
- (when (ly:grob-property what 'when)))
+ 'tweak-key
+ "tweaks"))
+ (when (ly:grob-property what 'when)))
(if (not (hash-ref tweaks key))
- (hash-set! tweaks key '()))
+ (hash-set! tweaks key '()))
(hash-set! tweaks key
- (acons when property-pairs
- (hash-ref tweaks key)))))
+ (acons when property-pairs
+ (hash-ref tweaks key)))))
(define (graceless-moment mom)
(ly:make-moment (ly:moment-main-numerator mom)
- (ly:moment-main-denominator mom)
- 0 0))
+ (ly:moment-main-denominator mom)
+ 0 0))
(define (moment->skip mom)
(let ((main (if (> (ly:moment-main-numerator mom) 0)
- (format "\\skip 1*~a/~a"
- (ly:moment-main-numerator mom)
- (ly:moment-main-denominator mom))
- ""))
- (grace (if (< (ly:moment-grace-numerator mom) 0)
- (format "\\grace { \\skip 1*~a/~a }"
- (- (ly:moment-grace-numerator mom))
- (ly:moment-grace-denominator mom))
- "")))
+ (format "\\skip 1*~a/~a"
+ (ly:moment-main-numerator mom)
+ (ly:moment-main-denominator mom))
+ ""))
+ (grace (if (< (ly:moment-grace-numerator mom) 0)
+ (format "\\grace { \\skip 1*~a/~a }"
+ (- (ly:moment-grace-numerator mom))
+ (ly:moment-grace-denominator mom))
+ "")))
(format "~a~a" main grace)))
(define (dump-tweaks out-port tweak-list last-moment)
(if (not (null? tweak-list))
(let* ((now (caar tweak-list))
- (diff (ly:moment-sub now last-moment))
+ (diff (ly:moment-sub now last-moment))
(these-tweaks (cdar tweak-list))
(skip (moment->skip diff))
(line-break-str (if (assoc-get 'line-break these-tweaks #f)
(lambda ()
(pretty-print
(assoc-get 'spacing-parameters
- these-tweaks '()))))))
+ these-tweaks '()))))))
(base (format "~a~a~a"
line-break-str
page-break-str
space-tweaks)))
- (format out-port "~a\n~a\n" skip base)
- (dump-tweaks out-port (cdr tweak-list) (graceless-moment now)))))
+ (format out-port "~a\n~a\n" skip base)
+ (dump-tweaks out-port (cdr tweak-list) (graceless-moment now)))))
(define (dump-all-tweaks pages tweaks)
(let* ((paper (ly:paper-book-paper (page-property (car pages) 'paper-book)))
- (parser (ly:output-def-parser paper))
- (name (format "~a-page-layout.ly"
- (ly:parser-output-name parser)))
- (out-port (open-output-file name)))
- (ly:progress "Writing page layout to ~a" name)
+ (parser (ly:output-def-parser paper))
+ (name (format "~a-page-layout.ly"
+ (ly:parser-output-name parser)))
+ (out-port (open-output-file name)))
+ (ly:message "Writing page layout to ~a" name)
(hash-for-each
(lambda (key val)
(format out-port "~a = {" key)
tweaks)
(close-port out-port)))
-(define (write-page-breaks pages)
- "Dump page breaks"
- (let ((tweaks (make-hash-table 23)))
+(define (write-page-breaks pages)
+ "Dump page breaks and tweaks"
+ (let ((tweaks (make-hash-table 60)))
(define (handle-page page)
- (define index 0)
- (define music-system-heights
- (map-in-order (lambda (sys)
- (* -1 (car (paper-system-extent sys Y))))
- (remove (lambda (sys)
- (ly:prob-property? sys 'is-title))
- (page-lines page))))
- (define (handle-system sys)
- (let* ((props `((line-break . #t)
- (spacing-parameters
- . ((system-Y-extent . ,(paper-system-extent sys Y))
- (system-refpoint-Y-extent . ,(paper-system-staff-extents sys))
- (system-index . ,index)
- (music-system-heights . ,music-system-heights)
- (page-system-count . ,(length (page-lines page)))
- (page-printable-height . ,(page-printable-height page))
- (page-space-left . ,(page-property page 'space-left)))))))
- (if (equal? (car (page-lines page)) sys)
- (set! props (cons '(page-break . #t)
- props)))
- (if (not (ly:prob-property? sys 'is-title))
- (record-tweaks (ly:spanner-bound (ly:prob-property sys 'system-grob) LEFT)
- props
- tweaks))
- (set! index (1+ index))))
- (for-each handle-system (page-lines page)))
+ "Computes vertical stretch for each music line of `page' (starting by
+ the smallest lines), then record the tweak parameters of each line to
+ the `tweaks' hash-table."
+ (let* ((lines (page-property page 'lines))
+ (line-count (length lines))
+ (compute-max-stretch (ly:output-def-lookup
+ (ly:paper-book-paper (page-property page
+ 'paper-book))
+ 'system-maximum-stretch-procedure))
+ (page-number (page-property page 'page-number)))
+ (let set-line-stretch! ((sorted-lines (sort lines
+ (lambda (l1 l2)
+ (< (line-height l1)
+ (line-height l2)))))
+ (rest-height ;; sum of stretchable line heights
+ (reduce + 0.0
+ (map line-height
+ (filter stretchable-line? lines))))
+ (space-left (page-maximum-space-left page)))
+ (if (not (null? sorted-lines))
+ (let* ((line (first sorted-lines))
+ (height (line-height line))
+ (stretch (min (compute-max-stretch line)
+ (if (and (stretchable-line? line)
+ (positive? rest-height))
+ (/ (* height space-left) rest-height)
+ 0.0))))
+ (set! (ly:prob-property line 'stretch) stretch)
+ (set-line-stretch! (cdr sorted-lines)
+ (if (stretchable-line? line)
+ (- rest-height height)
+ rest-height)
+ (- space-left stretch)))))
+ (let record-line-tweak ((lines lines)
+ (is-first-line #t)
+ (index 0))
+ (if (not (null? lines))
+ (let ((line (first lines)))
+ (if (not (ly:prob-property? line 'is-title))
+ (record-tweaks
+ (ly:spanner-bound (ly:prob-property line 'system-grob) LEFT)
+ `((line-break . #t)
+ (page-break . ,is-first-line)
+ (spacing-parameters
+ . ((page-number . ,page-number)
+ (system-index . ,index)
+ (system-stretch . ,(ly:prob-property line 'stretch))
+ (system-Y-extent . ,(paper-system-extent line Y))
+ (system-refpoint-Y-extent . ,(paper-system-staff-extents line))
+ (page-system-count . ,line-count)
+ (page-printable-height . ,(page-printable-height page))
+ (page-space-left . ,(page-property page 'space-left)))))
+ tweaks))
+ (record-line-tweak (cdr lines) #f (1+ index)))))))
+ ;; Compute tweaks for each page, then dump them to the page-layout file
(for-each handle-page pages)
(dump-all-tweaks pages tweaks)))
projects / lilypond.git / blobdiff