/usr/share/lilypond/2.18.2/scm/page.scm is in lilypond-data 2.18.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 | ;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
;;;; Copyright (C) 2006--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
;;;;
;;;; LilyPond is free software: you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;;; the Free Software Foundation, either version 3 of the License, or
;;;; (at your option) any later version.
;;;;
;;;; LilyPond is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;;; GNU General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU General Public License
;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
(define-module (scm page)
#:export (make-page
page-property
page-set-property!
page-prev
page-printable-height
layout->page-init
page-force
page-penalty
page-configuration
page-lines
page-page-number
page-system-numbers
page-stencil
page-free-height
page?
))
(use-modules (lily)
(scm paper-system)
(srfi srfi-1))
(define (annotate? layout)
(eq? #t (ly:output-def-lookup layout 'annotate-spacing)))
(define page-module (current-module))
(define (make-page paper-book . args)
(let*
((p (apply ly:make-prob (append
(list 'page (layout->page-init (ly:paper-book-paper paper-book))
'paper-book paper-book)
args))))
(page-set-property! p 'head-stencil (page-header p))
(page-set-property! p 'foot-stencil (page-footer p))
p))
(define page-property ly:prob-property)
(define page-set-property! ly:prob-set-property!)
(define (page-property? page sym)
(eq? #t (page-property page sym)))
(define (page? x) (ly:prob-type? x 'page))
;; define accessors.
(for-each
(lambda (j)
(module-define!
page-module
(string->symbol (format #f "page-~a" j))
(lambda (pg)
(page-property pg j))))
'(page-number prev lines force penalty lines))
(define (page-system-numbers page)
(map (lambda (ps) (ly:prob-property ps 'number))
(page-lines page)))
(define (page-translate-systems page)
(for-each
(lambda (sys-off)
(let*
((sys (car sys-off))
(off (cadr sys-off)))
(if (not (number? (ly:prob-property sys 'Y-offset)))
(ly:prob-set-property! sys 'Y-offset off))))
(zip (page-property page 'lines)
(page-property page 'configuration))))
(define (annotate-top-space first-system layout header-stencil stencil)
(let* ((top-margin (ly:output-def-lookup layout 'top-margin))
(sym (if (paper-system-title? first-system)
'top-markup-spacing
'top-system-spacing))
(spacing-spec (ly:output-def-lookup layout sym))
(X-offset (ly:prob-property first-system 'X-offset 5))
(header-extent (ly:stencil-extent header-stencil Y)))
(set! stencil
(ly:stencil-add stencil
(ly:stencil-translate-axis
(annotate-spacing-spec layout
spacing-spec
(- top-margin)
(car header-extent)
#:base-color red)
X-offset X)))
stencil))
(define (annotate-page layout stencil)
(let ((top-margin (ly:output-def-lookup layout 'top-margin))
(paper-height (ly:output-def-lookup layout 'paper-height))
(bottom-margin (ly:output-def-lookup layout 'bottom-margin))
(add-stencil (lambda (y)
(set! stencil
(ly:stencil-add stencil
(ly:stencil-translate-axis y 6 X))))))
(add-stencil
(ly:stencil-translate-axis
(annotate-y-interval layout "paper-height"
(cons (- paper-height) 0)
#t)
1 X))
(add-stencil
(ly:stencil-translate-axis
(annotate-y-interval layout "top-margin"
(cons (- top-margin) 0)
#t)
2 X))
(add-stencil
(ly:stencil-translate-axis
(annotate-y-interval layout "bottom-margin"
(cons (- paper-height) (- bottom-margin paper-height))
#t)
2 X))
stencil))
(define (annotate-space-left page)
(let*
((paper-book (page-property page 'paper-book))
(layout (ly:paper-book-paper paper-book))
(arrow (annotate-y-interval layout
"space left"
(cons (- 0.0
(page-property page 'bottom-edge)
(let ((foot (page-property page 'foot-stencil)))
(if (and (ly:stencil? foot)
(not (ly:stencil-empty? foot)))
(car (ly:stencil-extent foot Y))
0.0)))
(page-property page 'bottom-system-edge))
#t)))
(set! arrow (ly:stencil-translate-axis arrow 8 X))
arrow))
(define (page-header-or-footer page dir)
(let*
((paper-book (page-property page 'paper-book))
(layout (ly:paper-book-paper paper-book))
(scopes (ly:paper-book-scopes paper-book))
(number (page-page-number page))
(is-last-bookpart (page-property page 'is-last-bookpart))
(is-bookpart-last-page (page-property page 'is-bookpart-last-page))
(sym (if (= dir UP)
'make-header
'make-footer))
(header-proc (ly:output-def-lookup layout sym)))
(if (procedure? header-proc)
(header-proc layout scopes number is-last-bookpart is-bookpart-last-page)
#f)))
(define (page-header page)
(page-header-or-footer page UP))
(define (page-footer page)
(page-header-or-footer page DOWN))
(define (layout->page-init layout)
"Alist of settings for page layout"
(let*
((paper-height (ly:output-def-lookup layout 'paper-height))
(paper-width (ly:output-def-lookup layout 'paper-width))
(left-margin (ly:output-def-lookup layout 'left-margin))
(right-margin (ly:output-def-lookup layout 'right-margin))
(bottom-edge (- paper-height
(ly:output-def-lookup layout 'bottom-margin)) )
(top-margin (ly:output-def-lookup layout 'top-margin))
)
`((paper-height . ,paper-height)
(paper-width . ,paper-width)
(left-margin . ,left-margin)
(right-margin . ,right-margin)
(top-margin . ,top-margin)
(bottom-edge . ,bottom-edge)
)))
(define (make-page-stencil page)
"Construct a stencil representing the page from PAGE."
(page-translate-systems page)
(let*
((paper-book (page-property page 'paper-book))
(prop (lambda (sym) (page-property page sym)))
(layout (ly:paper-book-paper paper-book))
(scopes (ly:paper-book-scopes paper-book))
(lines (page-lines page))
(number (page-page-number page))
;; TODO: naming paper-height/paper-width not analogous to TeX.
(system-xoffset (ly:output-def-lookup layout 'horizontal-shift 0.0))
(system-separator-markup (ly:output-def-lookup layout 'system-separator-markup))
(system-separator-stencil (if (markup? system-separator-markup)
(interpret-markup layout
(layout-extract-page-properties layout)
system-separator-markup)
#f))
(page-stencil (ly:make-stencil '()))
(last-system #f)
(last-y 0.0)
(add-to-page (lambda (stencil x y)
(set! page-stencil
(ly:stencil-add page-stencil
(ly:stencil-translate stencil
(cons
(+ system-xoffset x)
(- 0 y (prop 'top-margin)))
)))))
(add-system
(lambda (system)
(let* ((stencil (paper-system-stencil system))
(y (ly:prob-property system 'Y-offset 0))
(is-title (paper-system-title?
system)))
(add-to-page stencil
(ly:prob-property system 'X-offset 0.0)
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
0
(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))))
(head (prop 'head-stencil))
(foot (prop 'foot-stencil))
)
(if (and
(ly:stencil? head)
(not (ly:stencil-empty? head)))
(begin
;; Ensure that the top of the header just touches the top margin.
(set! head (ly:stencil-translate-axis head
(- 0 (cdr (ly:stencil-extent head Y)) (prop 'top-margin)) Y))
(set! page-stencil (ly:stencil-add page-stencil head))))
(if (and
(annotate? layout)
(pair? lines))
(begin
(set! page-stencil (annotate-top-space (car lines) layout head page-stencil))
(for-each (lambda (sys next-sys)
(paper-system-annotate sys next-sys layout))
lines
(append (cdr lines) (list #f)))
(paper-system-annotate-last (car (last-pair lines)) layout)))
(for-each add-system lines)
(ly:prob-set-property! page 'bottom-system-edge
(car (ly:stencil-extent page-stencil Y)))
(ly:prob-set-property! page 'space-left
(+ (prop 'bottom-edge)
(prop 'bottom-system-edge)
(if (and (ly:stencil? foot)
(not (ly:stencil-empty? foot)))
(car (ly:stencil-extent foot Y))
0.0)))
(if (annotate? layout)
(set! page-stencil
(ly:stencil-add page-stencil
(annotate-space-left page))))
(if (and (ly:stencil? foot)
(not (ly:stencil-empty? foot)))
(set! page-stencil
(ly:stencil-add
page-stencil
(ly:stencil-translate
foot
(cons 0
(+ (- (prop 'bottom-edge))
(- (car (ly:stencil-extent foot Y)))))))))
(if (ly:output-def-lookup layout 'two-sided #f)
(set! page-stencil
(ly:stencil-translate page-stencil
(cons (prop (if (even? number)
'left-margin
'right-margin))
0)))
(set! page-stencil
(ly:stencil-translate page-stencil (cons (prop 'left-margin) 0))))
;; annotation.
(if (annotate? layout)
(set! page-stencil (annotate-page layout page-stencil)))
page-stencil))
(define-public (page-stencil page)
(if (not (ly:stencil? (page-property page 'stencil)))
;; todo: make tweakable.
;; via property + callbacks.
(page-set-property! page 'stencil (make-page-stencil page)))
(page-property page 'stencil))
(define (calc-printable-height page)
"Printable area for music and titles; matches default-page-make-stencil."
(let*
((paper-book (page-property page 'paper-book))
(layout (ly:paper-book-paper paper-book))
(h (- (ly:output-def-lookup layout 'paper-height)
(ly:output-def-lookup layout 'top-margin)
(ly:output-def-lookup layout 'bottom-margin)))
(head (page-property page 'head-stencil))
(foot (page-property page 'foot-stencil))
(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 (page-printable-height page)
(if (not (number? (page-property page 'printable-height)))
(page-set-property! page 'printable-height (calc-printable-height page)))
(page-property page 'printable-height))
|