;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
(use-modules (oop goops describe)
- (oop goops))
+ (oop goops)
+ (scm paper-system)
+ (scm page)
+ )
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+(define (write-page-breaks pages)
+ "Dump page breaks"
-(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)
- (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))
+ (define tweaks (make-hash-table 23))
-(define-method (display (node <optimally-broken-page-node>) port)
- (map (lambda (x) (display x port))
- (list
- "Page " (node-page-number node)
- " Lines: " (node-lines node)
- " Penalty " (node-penalty node)
- "\n")))
-
-(define-method (node-system-numbers (node <optimally-broken-page-node>))
- (map (lambda (ps) (ly:paper-system-property ps 'number))
- (node-lines node)))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-(define (annotate? layout)
- (eq? #t (ly:output-def-lookup layout 'annotatespacing)))
-
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-(define-public (paper-system-staff-extents ps)
- (ly:paper-system-property ps 'refpoint-Y-extent '(0 . 0)))
-
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; ANNOTATIONS
-;;
-;; annotations are arrows indicating the numerical value of
-;; spacing variables
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-(define (annotate-y-interval layout name extent is-length?)
- ;; do something sensible for 0,0 intervals.
- (set! extent (interval-widen extent 0.001))
- (let*
- ((text-props (cons
- '((font-size . -3)
- (font-family . typewriter))
- (layout-extract-page-properties layout)))
- (annotation (interpret-markup
- layout text-props
- (make-column-markup
- (list
- (make-whiteout-markup (make-simple-markup name))
- (make-whiteout-markup
- (make-simple-markup
- (if is-length?
- (format "~$" (interval-length extent))
- (format "(~$,~$)" (car extent)
- (cdr extent)))))))))
- (arrows
- (ly:stencil-translate-axis
- (dimension-arrows (cons 0 (interval-length extent)))
- (interval-start extent) Y)))
-
- (set! annotation
- (ly:stencil-aligned-to annotation Y CENTER))
-
- (set! annotation (ly:stencil-translate annotation
- (cons 0 (interval-center extent))))
-
- (set! annotation
- (ly:stencil-combine-at-edge arrows X RIGHT annotation 0.5 0))
-
- (set! annotation
- (ly:make-stencil (ly:stencil-expr annotation)
- (ly:stencil-extent annotation X)
- (cons 10000 -10000)))
- annotation))
-
-(define (paper-system-annotate-last system layout)
- (let*
- ((bottomspace (ly:paper-system-property system 'bottom-space))
- (y-extent (paper-system-extent system Y))
- (x-extent (paper-system-extent system X))
- (stencil (ly:paper-system-property system 'stencil))
-
- (arrow (if (number? bottomspace)
- (annotate-y-interval layout
- "bottom-space"
- (cons (- (car y-extent) bottomspace)
- (car y-extent))
- #t)
- #f)))
-
- (if arrow
- (set! stencil
- (ly:stencil-add stencil arrow)))
-
- (set! (ly:paper-system-property system 'stencil)
- stencil)
- ))
-
-(define (paper-system-annotate system layout)
- "Add arrows and texts to indicate which lengths are set."
- (let*
- ((annotations (ly:make-stencil '() (cons 0 2) (cons 0 0)))
- (append-stencil
- (lambda (a b)
- (ly:stencil-combine-at-edge a X RIGHT b 0.5 0)))
-
- (annotate-property
- (lambda (name extent is-length?)
- (set! annotations
- (append-stencil annotations
- (annotate-y-interval layout
- name extent is-length?)))))
-
- (bbox-extent (paper-system-extent system Y))
- (refp-extent (ly:paper-system-property system 'refpoint-Y-extent))
- (next-space (ly:paper-system-property system 'next-space
- (ly:output-def-lookup layout 'betweensystemspace)
- ))
- (next-padding (ly:paper-system-property system 'next-padding
- (ly:output-def-lookup layout 'betweensystempadding)
- ))
-
- )
-
- (if (number-pair? bbox-extent)
- (begin
- (annotate-property "Y-extent"
- bbox-extent #f)
- (annotate-property "next-padding"
- (interval-translate (cons (- next-padding) 0) (car bbox-extent))
- #t)))
-
- ;; titles don't have a refpoint-Y-extent.
- (if (number-pair? refp-extent)
- (begin
- (annotate-property "refpoint-Y-extent"
- refp-extent #f)
-
- (annotate-property "next-space"
- (interval-translate (cons (- next-space) 0) (car refp-extent))
- #t)))
-
-
-
- (set! (ly:paper-system-property system 'stencil)
- (ly:stencil-add
- (ly:paper-system-property system 'stencil)
- (ly:make-stencil
- (ly:stencil-expr annotations)
- (ly:stencil-extent empty-stencil X)
- (ly:stencil-extent empty-stencil Y)
- )))
-
- ))
-
-(define (annotate-page layout stencil)
- (let*
- ((topmargin (ly:output-def-lookup layout 'topmargin))
- (vsize (ly:output-def-lookup layout 'vsize))
- (bottommargin (ly:output-def-lookup layout 'bottommargin))
- (add-stencil (lambda (y)
- (set! stencil
- (ly:stencil-add stencil y))
- )))
-
- (add-stencil
- (ly:stencil-translate-axis
- (annotate-y-interval layout "vsize"
- (cons (- vsize) 0)
- #t)
- 1 X))
-
-
- (add-stencil
- (ly:stencil-translate-axis
- (annotate-y-interval layout "topmargin"
- (cons (- topmargin) 0)
- #t)
- 2 X))
-
- (add-stencil
- (ly:stencil-translate-axis
- (annotate-y-interval layout "bottommargin"
- (cons (- vsize) (- bottommargin vsize))
- #t)
- 2 X))
-
- stencil))
-
-(define (annotate-space-left page-stencil layout bottom-edge)
- (let*
- ((arrow (annotate-y-interval layout
- "space left"
- (cons (- bottom-edge) (car (ly:stencil-extent page-stencil Y)))
- #t)))
-
- (set! arrow (ly:stencil-translate-axis arrow 8 X))
- (ly:stencil-add page-stencil arrow)))
-
-\f
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-
-(define (page-headfoot layout scopes number
- sym separation-symbol dir last?)
- "Create a stencil including separating space."
-
- (let* ((header-proc (ly:output-def-lookup layout sym))
- (sep (ly:output-def-lookup layout separation-symbol))
- (stencil (ly:make-stencil "" '(0 . 0) '(0 . 0)))
- (head-stencil
- (if (procedure? header-proc)
- (header-proc layout scopes number last?)
- #f))
- )
-
- (if (and (number? sep)
- (ly:stencil? head-stencil)
- (not (ly:stencil-empty? head-stencil)))
-
- (begin
- (set! head-stencil
- (ly:stencil-combine-at-edge
- stencil Y dir head-stencil
- sep 0.0))
-
-
- ;; add arrow markers
- (if (annotate? layout)
- (set! head-stencil
- (ly:stencil-add
- (ly:stencil-translate-axis
- (annotate-y-interval layout
- (symbol->string separation-symbol)
- (cons (min 0 (* dir sep))
- (max 0 (* dir sep)))
- #t)
- (/ (ly:output-def-lookup layout 'linewidth) 2)
- X)
- (if (= dir UP)
- (ly:stencil-translate-axis
- (annotate-y-interval layout
- "pagetopspace"
- (cons
- (- (min 0 (* dir sep))
- (ly:output-def-lookup layout 'pagetopspace))
- (min 0 (* dir sep)))
- #t)
- (+ 7 (interval-center (ly:stencil-extent head-stencil X))) X)
- empty-stencil
- )
- head-stencil
- ))
- )))
-
- 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)
- (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
- (- 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))
- available))
-
-(define-public (default-page-make-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-xoffset (ly:output-def-lookup layout 'horizontalshift 0.0))
- (system-separator-markup (ly:output-def-lookup layout 'systemSeparatorMarkup))
- (system-separator-stencil (if (markup? system-separator-markup)
- (interpret-markup layout
- (layout-extract-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 stencil
- (cons
- system-xoffset
- (- 0 head-height y topmargin))
-
- )))))
- (add-system
- (lambda (stencil-position)
- (let* ((system (car stencil-position))
- (stencil (paper-system-stencil system))
- (y (cadr stencil-position))
- (is-title (paper-system-title?
- (car stencil-position))))
- (add-to-page stencil y)
- (if (and (ly:stencil? system-separator-stencil)
- last-system
- (not (paper-system-title? system))
- (not (paper-system-title? last-system)))
- (add-to-page
- system-separator-stencil
- (average (- last-y
- (car (paper-system-staff-extents last-system)))
- (- y
- (cdr (paper-system-staff-extents system))))))
- (set! last-system system)
- (set! last-y y))))
+ (define (record what property-pairs)
+ (let*
+ ((key (ly:output-def-lookup (ly:grob-layout what)
+ 'tweak-key
+ "tweaks"
+ ))
+ (when (ly:grob-property what 'when))
)
-
- (if (annotate? layout)
- (begin
- (for-each (lambda (sys) (paper-system-annotate sys layout))
- lines)
- (paper-system-annotate-last (car (last-pair lines)) layout)))
-
-
- (if #f
- (display (list
- "leftmargin " leftmargin "rightmargin " rightmargin
- )))
-
- (set! page-stencil (ly:stencil-combine-at-edge
- page-stencil Y DOWN
- (if (and
- (ly:stencil? head)
- (not (ly:stencil-empty? head)))
- head
- (ly:make-stencil "" (cons 0 0) (cons 0 0)))
- 0. 0.))
-
- (map add-system (zip lines offsets))
-
- (if (annotate? layout)
- (set!
- page-stencil
- (annotate-space-left page-stencil layout
- (- bottom-edge
- (if (ly:stencil? foot)
- (interval-length (ly:stencil-extent foot Y))
- 0)))
- ))
-
-
- (if (and (ly:stencil? foot)
- (not (ly:stencil-empty? foot)))
- (set! page-stencil
- (ly:stencil-add
- page-stencil
- (ly:stencil-translate
- foot
- (cons 0
- (+ (- bottom-edge)
- (- (car (ly:stencil-extent foot Y)))))))))
-
- (set! page-stencil
- (ly:stencil-translate page-stencil (cons leftmargin 0)))
-
- ;; annotation.
- (if (annotate? layout)
- (set! page-stencil (annotate-page layout page-stencil)))
+ (if (not (hash-ref tweaks key))
+ (hash-set! tweaks key '()))
+
+ (hash-set! 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))
+
+ (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 "~a~a" main grace)))
-
- page-stencil))
-
-;;; optimal page breaking
-
-;;; This is not optimal page breaking, this is optimal distribution of
-;;; lines over pages; line breaks are a given.
+ (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))
+ (these-tweaks (cdar tweak-list))
+ (skip (moment->skip diff))
+ (line-break-str (if (assoc-get 'line-break these-tweaks #f)
+ "\\break\n"
+ ""))
+ (page-break-str (if (assoc-get 'page-break these-tweaks #f)
+ "\\pageBreak\n"
+ ""))
+ (space-tweaks (format "\\spacingTweaks #'~a\n"
+ (with-output-to-string
+ (lambda ()
+ (pretty-print
+
+ (assoc-get 'spacing-parameters 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))
+ )))
+
+ (define (dump-all-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)
+ (hash-for-each
+ (lambda (key val)
+ (format out-port "~a = {" key)
+ (dump-tweaks out-port (reverse val) (ly:make-moment 0 1))
+ (display "}" out-port))
+ tweaks)
+ (close-port out-port)
+ ))
+
+ (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 (ly:spanner-bound (ly:prob-property sys 'system-grob) LEFT)
+ props))
+
+ (set! index (1+ index))
+ ))
+ (for-each handle-system (page-lines page)))
+
+ (for-each handle-page pages)
+ (dump-all-tweaks))
+
+(define (post-process-pages layout pages)
+ (if (ly:output-def-lookup layout 'write-page-layout #f)
+ (write-page-breaks pages)))
+
+;; Optimal distribution of
+;; lines over pages; line breaks are a given.
;; TODO:
;;
;; - density scoring
;; - separate function for word-wrap style breaking?
-;; - raggedbottom? raggedlastbottom?
+;; - ragged-bottom? ragged-last-bottom?
(define-public (optimal-page-breaks lines paper-book)
- "Return pages as a list starting with 1st page. Each page is a list
-of lines. "
+ "Return pages as a list starting with 1st page. Each page is a 'page Prob."
(define MAXPENALTY 1e9)
(define paper (ly:paper-book-paper paper-book))
+
+ ;; ugh.
+ (define page-alist (layout->page-init (ly:paper-book-paper paper-book)))
(define scopes (ly:paper-book-scopes paper-book))
(define force-equalization-factor #f)
-
- (define (page-height page-number last?)
- (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))
+ (if (page? node)
+ (get-path (page-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))))
+ (page-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))
+ (page-penalty (car best-paths))))
+ (inter-system-space (ly:output-def-lookup paper 'between-system-space))
(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))
(define (space-systems page-height lines ragged?)
(let* ((global-inter-system-space
- (ly:output-def-lookup paper 'betweensystemspace))
+ (ly:output-def-lookup paper 'between-system-space))
(top-space
- (ly:output-def-lookup paper 'pagetopspace))
- (global-fixed-dist (ly:output-def-lookup paper 'betweensystempadding))
+ (ly:output-def-lookup paper 'page-top-space))
+ (global-fixed-dist (ly:output-def-lookup paper 'between-system-padding))
(system-vector (list->vector
(append lines
(interval-end (vector-ref real-extents 0))
))
(last-system (vector-ref system-vector (1- system-count)))
- (bottom-space (if (ly:paper-system? last-system)
- (ly:paper-system-property last-system 'bottom-space 0.0)
+ (bottom-space (if (ly:prob? last-system)
+ (ly:prob-property last-system 'bottom-space 0.0)
0.0))
(space-left (- page-height
bottom-space
(lambda (idx)
(let* (
(upper-system (vector-ref system-vector idx))
- (between-space (ly:paper-system-property upper-system 'next-space
+ (between-space (ly:prob-property upper-system 'next-space
global-inter-system-space))
- (fixed-dist (ly:paper-system-property upper-system 'next-padding
+ (fixed-dist (ly:prob-property upper-system 'next-padding
global-fixed-dist))
(this-system-ext (vector-ref staff-extents idx))
(ideal (+
(cond
((and title2? title1?)
- (ly:output-def-lookup paper 'betweentitlespace))
+ (ly:output-def-lookup paper 'between-title-space))
(title1?
- (ly:output-def-lookup paper 'aftertitlespace))
+ (ly:output-def-lookup paper 'after-title-space))
(title2?
- (ly:output-def-lookup paper 'beforetitlespace))
+ (ly:output-def-lookup paper 'before-title-space))
(else between-space))
fixed))
(hooke (/ 1 (- ideal fixed))))
(lambda (idx)
(let* (
(upper-system (vector-ref system-vector idx))
- (fixed-dist (ly:paper-system-property upper-system 'next-padding
+ (fixed-dist (ly:prob-property upper-system 'next-padding
global-fixed-dist))
(this-system-ext (vector-ref real-extents idx))
(next-system-ext (vector-ref real-extents (1+ idx)))
(rods (map calc-rod (iota (1- system-count))))
;; we don't set ragged based on amount space left.
- ;; raggedbottomlast = ##T is much more predictable
+ ;; ragged-bottomlast = ##T is much more predictable
(result (ly:solve-spring-rod-problem
springs rods space
ragged?))
(cons force positions)))
- (define (walk-paths done-lines best-paths current-lines last? current-best)
+ (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
ascending range of lines, and BEST-PATHS contains the optimal breaks
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)))))
+ (ly:output-def-lookup paper 'first-page-number)
+ (1+ (page-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)))
+ (this-page (make-page
+ page-alist
+ 'paper-book paper-book
+ 'is-last last?
+ 'page-number this-page-num))
+
+ (ragged-all? (eq? #t (ly:output-def-lookup paper 'ragged-bottom)))
+ (ragged-last? (eq? #t (ly:output-def-lookup paper 'ragged-last-bottom)))
(ragged? (or ragged-all?
(and ragged-last?
last?)))
- (page-height (page-height this-page-num last?))
- (vertical-spacing (space-systems page-height current-lines ragged?))
+ (height (page-printable-height this-page))
+ (vertical-spacing (space-systems height current-lines ragged?))
+
(satisfied-constraints (car vertical-spacing))
(force (if satisfied-constraints
(if (and last? ragged-last?)
10000))
(positions (cdr vertical-spacing))
(get-break-penalty (lambda (sys)
- (ly:paper-system-property sys 'penalty 0.0)))
+ (ly:prob-property sys 'penalty 0.0)))
(user-nobreak-penalties
(-
(apply + (filter negative?
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))
- #:lines current-lines
- #:pageno this-page-num
- #:force force
- #:configuration positions
- #:penalty total-penalty)
+ (is-better (or
+ (not current-best)
+ (and
+ satisfied-constraints
+ (< total-penalty (page-penalty current-best)))))
+ (new-best (if is-better
+ (begin
+ (map
+ (lambda (x)
+ (page-set-property! this-page
+ (car x)
+ (cdr x)))
+ (list
+ (cons 'prev (if (null? best-paths)
+ #f
+ (car best-paths)))
+ (cons 'lines current-lines)
+ (cons 'force force)
+ (cons 'configuration positions)
+ (cons 'penalty total-penalty)))
+ this-page)
current-best)))
;; (display total-penalty) (newline)
"\nuser pen " user-penalty
"\nsatisfied-constraints" satisfied-constraints
"\nlast? " last? "ragged?" ragged?
- "\nbetter? " better? " total-penalty " total-penalty "\n"
+ "\nis-better " is-better " total-penalty " total-penalty "\n"
"\nconfig " positions
"\nforce " force
"\nlines: " current-lines "\n")))
(if #f ; debug
- (display (list "\nnew-best is " (node-lines new-best)
+ (display (list "\nnew-best is " (page-lines new-best)
"\ncontinuation of "
(if (null? best-paths)
"start"
- (node-lines (car best-paths))))))
+ (page-lines (car best-paths))))))
(if (and (pair? done-lines)
;; if this page is too full, adding another line won't help
(define (walk-lines done best-paths todo)
"Return the best page breaking as a single
-<optimal-page-break-node> for optimally breaking TODO ++
+page node for optimally breaking TODO ++
DONE.reversed. BEST-PATHS is a list of break nodes corresponding to
DONE."
(cdr todo)))))
(define (line-number node)
- (ly:paper-system-property (car (node-lines node)) 'number))
-
+ (ly:prob-property (car (page-lines node)) 'number))
+
(ly:message (_ "Calculating page breaks..."))
(set! force-equalization-factor
(ly:output-def-lookup paper 'verticalequalizationfactor 0.3))
-
+
(let* ((best-break-node (walk-lines '() '() lines))
- (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))
- (ly:progress "["))
- (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
- (ly:progress (number->string
- (car (last-pair (node-system-numbers node)))))
- (ly:progress "]")))
- stencil))
+ (break-nodes (get-path best-break-node '())))
+ (page-set-property! (car (last-pair break-nodes)) 'is-last #t)
(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))))
+ "\nsystems " (map page-lines break-nodes)
+ "\npenalties " (map page-penalty break-nodes)
+ "\nconfigs " (map page-configuration break-nodes))))
- (let ((stencils (map node->page-stencil break-nodes)))
- (ly:progress "\n")
- stencils)))
+ ;; construct page stencils.
+ (for-each page-stencil break-nodes)
+ (post-process-pages paper break-nodes)
+
+ break-nodes))
projects / lilypond.git / blobdiff