-;;; page-layout.scm -- page breaking and page layout
-;;;
+;;;; page-layout.scm -- page breaking and page layout
+;;;;
;;;; source file of the GNU LilyPond music typesetter
;;;;
-;;;; (c) 2004 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; (c) 2004--2005 Jan Nieuwenhuizen <janneke@gnu.org>
;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
(use-modules (oop goops describe)
(define-class <optimally-broken-page-node> ()
(prev #:init-value '() #:accessor node-prev #:init-keyword #:prev)
(page #:init-value 0 #:accessor node-page-number #:init-keyword #:pageno)
- (force #:init-value 0 #:accessor node-force #:init-keyword #:force)
+ (force #:init-value 0 #:accessor node-force #:init-keyword #:force)
(penalty #:init-value 0 #:accessor node-penalty #:init-keyword #:penalty)
(configuration #:init-value '() #:accessor node-configuration #:init-keyword #:configuration)
(lines #:init-value 0 #:accessor node-lines #:init-keyword #:lines))
" Penalty " (node-penalty node)
"\n")))
+(define-method (node-system-numbers (node <optimally-broken-page-node>))
+ (map ly:paper-system-number (node-lines node)))
+
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-(define TAGLINE
- (string-append "Engraved by LilyPond (version " (lilypond-version) ")"))
-
(define (page-headfoot layout scopes number sym sepsym dir last?)
"Create a stencil including separating space."
- (let*
- ((header-proc (ly:output-def-lookup layout sym))
+ (let* ((header-proc (ly:output-def-lookup layout sym))
(sep (ly:output-def-lookup layout sepsym))
(stencil (ly:make-stencil "" '(0 . 0) '(0 . 0)))
(head-stencil
(not (ly:stencil-empty? head-stencil)))
(set! head-stencil
(ly:stencil-combine-at-edge
- stencil Y dir head-stencil
+ stencil Y dir head-stencil
sep 0.0)))
head-stencil))
(define-public (default-page-music-height layout scopes number last?)
- "Printable area for music and titles; matches default-page-make-stencil."
- (let*
- ((h (- (ly:output-def-lookup layout 'vsize)
+ "Printable area for music and titles; matches default-page-make-stencil."
+ (let* ((h (- (ly:output-def-lookup layout 'vsize)
(ly:output-def-lookup layout 'topmargin)
(ly:output-def-lookup layout 'bottommargin)))
(head (page-headfoot layout scopes number 'make-header 'headsep UP last?))
(foot (page-headfoot layout scopes number 'make-footer 'footsep DOWN last?))
- (available
+ (available
(- h (if (ly:stencil? head)
(interval-length (ly:stencil-extent head Y))
0)
(if (ly:stencil? foot)
(interval-length (ly:stencil-extent foot Y))
0))))
-
-; (display (list "\n available" available head foot))
+
+ ;; (display (list "\n available" available head foot))
available))
(define-public (default-page-make-stencil
- lines offsets layout scopes number last? )
- "Construct a stencil representing the page from LINES. "
- (let*
- ((topmargin (ly:output-def-lookup layout 'topmargin))
-
- ;; TODO: naming vsize/hsize not analogous to TeX.
-
- (vsize (ly:output-def-lookup layout 'vsize))
- (hsize (ly:output-def-lookup layout 'hsize))
-
- (lmargin (ly:output-def-lookup layout 'leftmargin))
- (leftmargin (if lmargin
- lmargin
- (/ (- hsize
- (ly:output-def-lookup layout 'linewidth)) 2)))
-
- (rightmargin (ly:output-def-lookup layout 'rightmargin))
- (bottom-edge (- vsize
- (ly:output-def-lookup layout 'bottommargin)))
-
- (head (page-headfoot layout scopes number 'make-header 'headsep UP last?))
- (foot (page-headfoot layout scopes number 'make-footer 'footsep DOWN last?))
-
- (head-height (if (ly:stencil? head)
- (interval-length (ly:stencil-extent head Y))
- 0.0))
-
- (line-stencils (map ly:paper-system-stencil lines))
- (height-proc (ly:output-def-lookup layout 'page-music-height))
-
- (page-stencil (ly:make-stencil '()
- (cons leftmargin hsize)
- (cons (- topmargin) 0)))
- (was-title #t)
- (add-system (lambda (stencil-position)
- (set! page-stencil
- (ly:stencil-add
- (ly:stencil-translate-axis
- (car stencil-position)
- (- 0
- head-height
- (cadr stencil-position)
- topmargin)
- Y)
- page-stencil))))
- )
+ lines offsets layout scopes number last?)
+ "Construct a stencil representing the page from LINES.
+
+ Offsets is a list of increasing numbers. They must be negated to
+create offsets.
+ "
+ (let* ((topmargin (ly:output-def-lookup layout 'topmargin))
+
+ ;; TODO: naming vsize/hsize not analogous to TeX.
+
+ (vsize (ly:output-def-lookup layout 'vsize))
+ (hsize (ly:output-def-lookup layout 'hsize))
+
+ (system-separator-markup (ly:output-def-lookup layout 'systemSeparatorMarkup))
+ (system-separator-stencil (if (markup? system-separator-markup)
+ (interpret-markup layout
+ (page-properties layout)
+ system-separator-markup)
+ #f))
+ (lmargin (ly:output-def-lookup layout 'leftmargin))
+ (leftmargin (if lmargin
+ lmargin
+ (/ (- hsize
+ (ly:output-def-lookup layout 'linewidth)) 2)))
+
+ (rightmargin (ly:output-def-lookup layout 'rightmargin))
+ (bottom-edge (- vsize
+ (ly:output-def-lookup layout 'bottommargin)))
+
+ (head (page-headfoot layout scopes number 'make-header 'headsep UP last?))
+ (foot (page-headfoot layout scopes number 'make-footer 'footsep DOWN last?))
+
+ (head-height (if (ly:stencil? head)
+ (interval-length (ly:stencil-extent head Y))
+ 0.0))
+
+ (height-proc (ly:output-def-lookup layout 'page-music-height))
+
+ (page-stencil (ly:make-stencil '()
+ (cons leftmargin hsize)
+ (cons (- topmargin) 0)))
+ (last-system #f)
+ (last-y 0.0)
+ (add-to-page (lambda (stencil y)
+ (set! page-stencil
+ (ly:stencil-add page-stencil
+ (ly:stencil-translate-axis stencil
+ (- 0 head-height y topmargin) Y)))))
+ (add-system
+ (lambda (stencil-position)
+ (let* ((system (car stencil-position))
+ (stencil (ly:paper-system-stencil system))
+ (y (cadr stencil-position))
+ (is-title (ly:paper-system-title?
+ (car stencil-position))))
+ (add-to-page stencil y)
+ (if (and (ly:stencil? system-separator-stencil)
+ last-system
+ (not (ly:paper-system-title? system))
+ (not (ly:paper-system-title? last-system)))
+ (add-to-page
+ system-separator-stencil
+ (average (- last-y
+ (car (ly:paper-system-staff-extents last-system)))
+ (- y
+ (cdr (ly:paper-system-staff-extents system))))))
+ (set! last-system system)
+ (set! last-y y)))))
(if #f
(display (list
- "leftmargin" leftmargin "rightmargin" rightmargin
- )))
-
+ "leftmargin" leftmargin "rightmargin" rightmargin)))
+
(set! page-stencil (ly:stencil-combine-at-edge
- page-stencil Y DOWN head 0. 0.))
+ page-stencil Y DOWN head 0. 0.))
- (map add-system (zip line-stencils offsets))
+ (map add-system (zip lines offsets))
(if (ly:stencil? foot)
(set! page-stencil
(ly:stencil-add
foot
(cons 0
(+ (- bottom-edge)
- (- (car (ly:stencil-extent foot Y)))))
- ))))
-
- (ly:stencil-translate page-stencil (cons leftmargin 0))
- ))
-
-
+ (- (car (ly:stencil-extent foot Y)))))))))
+ (ly:stencil-translate page-stencil (cons leftmargin 0))))
;;; optimal page breaking
;;; This is not optimal page breaking, this is optimal distribution of
;;; lines over pages; line breaks are a given.
-; TODO:
-;
-; - density scoring
-; - separate function for word-wrap style breaking?
-; - raggedbottom? raggedlastbottom?
+;; TODO:
+;;
+;; - density scoring
+;; - separate function for word-wrap style breaking?
+;; - raggedbottom? raggedlastbottom?
(define-public (ly:optimal-page-breaks
lines paper-book)
(define scopes (ly:paper-book-scopes paper-book))
(define (page-height page-number last?)
- (let
- ((p (ly:output-def-lookup paper 'page-music-height)))
+ (let ((p (ly:output-def-lookup paper 'page-music-height)))
(if (procedure? p)
(p paper scopes page-number last?)
10000)))
-
+
(define (get-path node done)
"Follow NODE.PREV, and return as an ascending list of pages. DONE
is what have collected so far, and has ascending page numbers."
-
+
(if (is-a? node <optimally-broken-page-node>)
(get-path (node-prev node) (cons node done))
done))
(define (combine-penalties force user best-paths)
- (let*
- ((prev-force (if (null? best-paths)
- 0.0
- (node-force (car best-paths))))
- (prev-penalty (if (null? best-paths)
+ (let* ((prev-force (if (null? best-paths)
0.0
- (node-penalty (car best-paths))))
+ (node-force (car best-paths))))
+ (prev-penalty (if (null? best-paths)
+ 0.0
+ (node-penalty (car best-paths))))
(inter-system-space (ly:output-def-lookup paper 'betweensystemspace))
(force-equalization-factor 0.3)
(relative-force (/ force inter-system-space))
- (abs-relative-force (abs relative-force))
- )
-
-
- (+ (* abs-relative-force (+ abs-relative-force 1))
- prev-penalty
- (* force-equalization-factor (/ (abs (- prev-force force)) inter-system-space))
- user)))
+ (abs-relative-force (abs relative-force)))
- (define (space-systems page-height lines ragged?)
- (let*
- ((inter-system-space
- (ly:output-def-lookup paper 'betweensystemspace))
- (system-vector (list->vector
- (append lines
- (if (= (length lines) 1)
- '(#f)
- '()))
- ))
+ (+ (* abs-relative-force (+ abs-relative-force 1))
+ prev-penalty
+ (* force-equalization-factor (/ (abs (- prev-force force)) inter-system-space))
+ user)))
+
+ (define (space-systems page-height lines ragged?)
+ (let* ((inter-system-space
+ (ly:output-def-lookup paper 'betweensystemspace))
+ (system-vector (list->vector
+ (append lines
+ (if (= (length lines) 1)
+ '(#f)
+ '()))))
(staff-extents
(list->vector
- (append (map
- ly:paper-system-staff-extents
- lines)
- (if (= (length lines) 1)
- '((0 . 0))
- '()))
- ))
+ (append (map ly:paper-system-staff-extents lines)
+ (if (= (length lines) 1)
+ '((0 . 0))
+ '()))))
(real-extents
(list->vector
(append
(map
(lambda (sys) (ly:paper-system-extent sys Y)) lines)
- (if (= (length lines) 1)
- '((0 . 0))
- '())
- )))
+ (if (= (length lines) 1)
+ '((0 . 0))
+ '()))))
(no-systems (vector-length real-extents))
(topskip (interval-end (vector-ref real-extents 0)))
(space-left (- page-height
- (apply + (map interval-length (vector->list real-extents)))
+ (apply + (map interval-length (vector->list real-extents)))))
- ))
-
(space (- page-height
topskip
- (- (interval-start (vector-ref real-extents (1- no-systems))))
- ))
+ (- (interval-start (vector-ref real-extents (1- no-systems))))))
(fixed-dist (ly:output-def-lookup paper 'betweensystempadding))
(calc-spring
(lambda (idx)
- (let*
- ((this-system-ext (vector-ref staff-extents idx))
+ (let* ((this-system-ext (vector-ref staff-extents idx))
(next-system-ext (vector-ref staff-extents (1+ idx)))
- (fixed (max 0 (- (+ (interval-end next-system-ext)
+ (fixed (max 0 (- (+ (interval-end next-system-ext)
fixed-dist)
(interval-start this-system-ext))))
(title1? (and (vector-ref system-vector idx)
(ly:paper-system-title? (vector-ref system-vector idx))))
(title2? (and
- (vector-ref system-vector (1+ idx))
- (ly:paper-system-title? (vector-ref system-vector (1+ idx)))))
+ (vector-ref system-vector (1+ idx))
+ (ly:paper-system-title? (vector-ref system-vector (1+ idx)))))
(ideal (+
(cond
((and title2? title1?)
(ly:output-def-lookup paper 'beforetitlespace))
(else inter-system-space))
fixed))
- (hooke (/ 1 (- ideal fixed)))
- )
- (list ideal hooke))
- ))
+ (hooke (/ 1 (- ideal fixed))))
+ (list ideal hooke))))
(springs (map calc-spring (iota (1- no-systems))))
(calc-rod
(lambda (idx)
- (let*
- ((this-system-ext (vector-ref real-extents idx))
+ (let* ((this-system-ext (vector-ref real-extents idx))
(next-system-ext (vector-ref real-extents (1+ idx)))
(distance (max (- (+ (interval-end next-system-ext)
- fixed-dist)
+ fixed-dist)
(interval-start this-system-ext)
- ) 0))
+ ) 0))
(entry (list idx (1+ idx) distance)))
entry)))
(rods (map calc-rod (iota (1- no-systems))))
(force (car result))
(positions
(map (lambda (y)
- (+ y topskip))
- (cdr result)))
- )
-
+ (+ y topskip))
+ (cdr result))))
+
(if #f ;; debug.
(begin
- (display (list "\n# systems: " no-systems
- "\nreal-ext" real-extents "\nstaff-ext" staff-extents
- "\ninterscore" inter-system-space
- "\nspace-letf" space-left
- "\nspring,rod" springs rods
- "\ntopskip " topskip
- " space " space
- "\npage-height" page-height
- "\nragged" ragged?
- "\nforce" force
- "\nres" (cdr result)
- "\npositions" positions "\n"))))
-
- (cons force positions)))
-
+ (display (list "\n# systems: " no-systems
+ "\nreal-ext" real-extents "\nstaff-ext" staff-extents
+ "\ninterscore" inter-system-space
+ "\nspace-letf" space-left
+ "\nspring,rod" springs rods
+ "\ntopskip " topskip
+ " space " space
+ "\npage-height" page-height
+ "\nragged" ragged?
+ "\nforce" force
+ "\nres" (cdr result)
+ "\npositions" positions "\n"))))
+
+ (cons force positions)))
+
(define (walk-paths done-lines best-paths current-lines last? current-best)
"Return the best optimal-page-break-node that contains
CURRENT-LINES. DONE-LINES.reversed ++ CURRENT-LINES is a consecutive
corresponding to DONE-LINES.
CURRENT-BEST is the best result sofar, or #f."
-
+
(let* ((this-page-num (if (null? best-paths)
(ly:output-def-lookup paper 'firstpagenumber)
(1+ (node-page-number (car best-paths)))))
(ragged-all? (eq? #t (ly:output-def-lookup paper 'raggedbottom)))
(ragged-last? (eq? #t (ly:output-def-lookup paper 'raggedlastbottom)))
- (ragged? (or ragged-all?
+ (ragged? (or ragged-all?
(and ragged-last?
last?)))
(page-height (page-height this-page-num last?))
(user-penalty
(+
(max (ly:paper-system-break-before-penalty (car current-lines)) 0.0)
- user-nobreak-penalties))
+ user-nobreak-penalties))
(total-penalty (combine-penalties
force user-penalty
best-paths))
-
+
(better? (or
(not current-best)
(< total-penalty (node-penalty current-best))))
(new-best (if better?
(make <optimally-broken-page-node>
- #:prev (if (null? best-paths)
- #f
- (car best-paths))
+ #:prev (if (null? best-paths)
+ #f
+ (car best-paths))
#:lines current-lines
#:pageno this-page-num
#:force force
#:configuration positions
#:penalty total-penalty)
current-best)))
-
- (if #t ;; debug
+
+ (if #f ;; debug
(display
(list
"\nuser pen " user-penalty
(if (null? best-paths)
"start"
(node-lines (car best-paths))))))
-
+
(if (and (pair? done-lines)
;; if this page is too full, adding another line won't help
satisfied-constraints)
(walk-paths (cdr done-lines) (cdr best-paths)
(cons (car done-lines) current-lines)
last? new-best)
-
new-best)))
(define (walk-lines done best-paths todo)
(last? (null? (cdr todo)))
(next (walk-paths done best-paths (list this-line) last? #f)))
-; (display "\n***************")
+ ;; (display "\n***************")
(walk-lines (cons this-line done)
(cons next best-paths)
(cdr todo)))))
(define (line-number node)
(ly:paper-system-number (car (node-lines node))))
+ (display (_ "Calculating page breaks...") (current-error-port))
+
(let* ((best-break-node (walk-lines '() '() lines))
- (break-nodes (get-path best-break-node '())))
+ (break-nodes (get-path best-break-node '()))
+ (last-node (car (last-pair break-nodes))))
+
+ (define (node->page-stencil node)
+ (if (not (eq? node last-node))
+ (display "[" (current-error-port)))
+ (let ((stencil
+ ((ly:output-def-lookup paper 'page-make-stencil)
+ (node-lines node)
+ (node-configuration node)
+ paper
+ scopes
+ (node-page-number node)
+ (eq? node best-break-node))))
+ (if (not (eq? node last-node))
+ (begin
+ (display (car (last-pair (node-system-numbers node)))
+ (current-error-port))
+ (display "]" (current-error-port))))
+ stencil))
(if #f; (ly:get-option 'verbose)
(begin
(display (list
"\nbreaks: " (map line-number break-nodes))
- "\nsystems " (map node-lines break-nodes)
- "\npenalties " (map node-penalty break-nodes)
- "\nconfigs " (map node-configuration break-nodes))))
-
-
- ; create stencils.
-
- (map (lambda (node)
- ((ly:output-def-lookup paper 'page-make-stencil)
- (node-lines node)
- (node-configuration node)
- paper
- scopes
- (node-page-number node)
- (eq? node best-break-node)))
- break-nodes)))
-
+ "\nsystems " (map node-lines break-nodes)
+ "\npenalties " (map node-penalty break-nodes)
+ "\nconfigs " (map node-configuration break-nodes))))
+ (let ((stencils (map node->page-stencil break-nodes)))
+ (newline (current-error-port))
+ stencils)))
projects / lilypond.git / blobdiff