+;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
-;;;; lily-library.scm -- utilities
+;;;; Copyright (C) 1998--2010 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; Han-Wen Nienhuys <hanwen@xs4all.nl>
;;;;
-;;;; source file of the GNU LilyPond music typesetter
+;;;; 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.
;;;;
-;;;; (c) 1998--2009 Jan Nieuwenhuizen <janneke@gnu.org>
-;;;; Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;; 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/>.
; for take, drop, take-while, list-index, and find-tail:
(use-modules (srfi srfi-1))
(or (equal? a b)
(ly:moment<? a b)))
+(define-public (fraction->moment fraction)
+ (if (null? fraction)
+ ZERO-MOMENT
+ (ly:make-moment (car fraction) (cdr fraction))))
+
+(define-public (moment->fraction moment)
+ (cons (ly:moment-main-numerator moment)
+ (ly:moment-main-denominator moment)))
+
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; arithmetic
(define-public (average x . lst)
(ly:make-score music))
-(define (get-outfile-name parser base)
- (let* ((output-suffix (ly:parser-lookup parser 'output-suffix))
+(define (get-current-filename parser)
+ "return any suffix value for output filename allowing for settings by
+calls to bookOutputName function"
+ (let ((book-filename (ly:parser-lookup parser 'book-filename)))
+ (if (not book-filename)
+ (ly:parser-output-name parser)
+ book-filename)))
+
+(define (get-current-suffix parser)
+ "return any suffix value for output filename allowing for settings by calls to
+bookoutput function"
+ (let ((book-output-suffix (ly:parser-lookup parser 'book-output-suffix)))
+ (if (not (string? book-output-suffix))
+ (ly:parser-lookup parser 'output-suffix)
+ book-output-suffix)))
+
+(define-public current-outfile-name #f) ; for use by regression tests
+
+(define (get-outfile-name parser)
+ "return current filename for generating backend output files"
+ ;; user can now override the base file name, so we have to use
+ ;; the file-name concatenated with any potential output-suffix value
+ ;; as the key to out internal a-list
+ (let* ((base-name (get-current-filename parser))
+ (output-suffix (get-current-suffix parser))
+ (alist-key (format "~a~a" base-name output-suffix))
(counter-alist (ly:parser-lookup parser 'counter-alist))
- (output-count (assoc-get output-suffix counter-alist 0))
- (result base))
+ (output-count (assoc-get alist-key counter-alist 0))
+ (result base-name))
;; Allow all ASCII alphanumerics, including accents
(if (string? output-suffix)
- (set! result (format "~a-~a"
- base (string-regexp-substitute
- "[^-[:alnum:]]" "_" output-suffix))))
+ (set! result
+ (format "~a-~a"
+ result
+ (string-regexp-substitute
+ "[^-[:alnum:]]"
+ "_"
+ output-suffix))))
;; assoc-get call will always have returned a number
(if (> output-count 0)
- (set! result (format #f "~a-~a" result output-count)))
+ (set! result (format #f "~a-~a" result output-count)))
(ly:parser-define!
- parser 'counter-alist
- (assoc-set! counter-alist output-suffix (1+ output-count)))
+ parser 'counter-alist
+ (assoc-set! counter-alist alist-key (1+ output-count)))
+ (set! current-outfile-name result)
result))
(define (print-book-with parser book process-procedure)
(let* ((paper (ly:parser-lookup parser '$defaultpaper))
(layout (ly:parser-lookup parser '$defaultlayout))
- (count (ly:parser-lookup parser 'output-count))
- (base (ly:parser-output-name parser))
- (outfile-name (get-outfile-name parser base)))
-
+ (outfile-name (get-outfile-name parser)))
(process-procedure book paper layout outfile-name)))
(define-public (print-book-with-defaults parser book)
(cons (cdar alist)
(flatten-alist (cdr alist))))))
+(define (assoc-remove key alist)
+ "Remove key (and its corresponding value) from an alist.
+ Different than assoc-remove! because it is non-destructive."
+ (define (assoc-crawler key l r)
+ (if (null? r)
+ l
+ (if (equal? (caar r) key)
+ (append l (cdr r))
+ (assoc-crawler key (append l `(,(car r))) (cdr r)))))
+ (assoc-crawler key '() alist))
+
+(define-public (map-selected-alist-keys function keys alist)
+ "Returns alist with function applied to all of the values in list keys.
+ For example:
+ @code{guile> (map-selected-alist-keys - '(a b) '((a . 1) (b . -2) (c . 3) (d . 4)))}
+ @code{((a . -1) (b . 2) (c . 3) (d . 4))}"
+ (define (map-selected-alist-keys-helper function key alist)
+ (map
+ (lambda (pair)
+ (if (equal? key (car pair))
+ (cons key (function (cdr pair)))
+ pair))
+ alist))
+ (if (null? keys)
+ alist
+ (map-selected-alist-keys
+ function
+ (cdr keys)
+ (map-selected-alist-keys-helper function (car keys) alist))))
+
;;;;;;;;;;;;;;;;
;; vector
(define (functional-or . rest)
(if (pair? rest)
(or (car rest)
- (apply functional-and (cdr rest)))
+ (apply functional-or (cdr rest)))
#f))
(define (functional-and . rest)
(lambda (x) x)
(map proc lst)))
-(define (flatten-list x)
+(define-public (flatten-list x)
"Unnest list."
(cond ((null? x) '())
((not (pair? x)) (list x))
Example: (split-at-predicate < '(1 2 3 2 1)) ==> ((1 2 3) . (2 1))"
(if (null? lst)
(list lst)
- (let ((i (list-index pred (cdr lst) lst)))
+ (let ((i (list-index (lambda (x y) (not (pred x y)))
+ lst
+ (cdr lst))))
(if i
(cons (take lst (1+ i)) (drop lst (1+ i)))
(list lst)))))
(cons (cons (car coords) (cadr coords))
(ly:list->offsets accum (cddr coords)))))
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; numbers
-
-(if (not (defined? 'nan?)) ;; guile 1.6 compat
- (define-public (nan? x) (not (or (< 0.0 x)
- (> 0.0 x)
- (= 0.0 x)))))
-
-(if (not (defined? 'inf?))
- (define-public (inf? x) (= (/ 1.0 x) 0.0)))
-
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; intervals
(define-public interval-end cdr)
-(define-public (interval-translate iv amount)
- (cons (+ amount (car iv))
- (+ amount (cdr iv))))
-
(define (other-axis a)
(remainder (+ a 1) 2))
(define-public (interval-widen iv amount)
- (cons (- (car iv) amount)
- (+ (cdr iv) amount)))
+ (cons (- (car iv) amount)
+ (+ (cdr iv) amount)))
(define-public (interval-empty? iv)
(> (car iv) (cdr iv)))
(define-public (interval-union i1 i2)
- (cons (min (car i1) (car i2))
- (max (cdr i1) (cdr i2))))
+ (cons
+ (min (car i1) (car i2))
+ (max (cdr i1) (cdr i2))))
(define-public (interval-intersection i1 i2)
- (cons (max (car i1) (car i2))
- (min (cdr i1) (cdr i2))))
+ (cons
+ (max (car i1) (car i2))
+ (min (cdr i1) (cdr i2))))
(define-public (interval-sane? i)
(not (or (nan? (car i))
(cons (min (interval-start interval) p)
(max (interval-end interval) p)))
+(define-public (reverse-interval iv)
+ (cons (cdr iv) (car iv)))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; coordinates
+
+(define coord-x car)
+(define coord-y cdr)
+
+(define (coord-operation operator operand coordinate)
+ (if (pair? operand)
+ (cons (operator (coord-x operand) (coord-x coordinate))
+ (operator (coord-y operand) (coord-y coordinate)))
+ (cons (operator operand (coord-x coordinate))
+ (operator operand (coord-y coordinate)))))
+
+(define (coord-apply function coordinate)
+ (if (pair? function)
+ (cons
+ ((coord-x function) (coord-x coordinate))
+ ((coord-y function) (coord-y coordinate)))
+ (cons
+ (function (coord-x coordinate))
+ (function (coord-y coordinate)))))
+
+(define-public (coord-translate coordinate amount)
+ (coord-operation + amount coordinate))
+
+(define-public (coord-scale coordinate amount)
+ (coord-operation * amount coordinate))
+
+(define-public (coord-rotate coordinate degrees-in-radians)
+ (let*
+ ((coordinate
+ (cons
+ (exact->inexact (coord-x coordinate))
+ (exact->inexact (coord-y coordinate))))
+ (radius
+ (sqrt
+ (+ (* (coord-x coordinate) (coord-x coordinate))
+ (* (coord-y coordinate) (coord-y coordinate)))))
+ (angle (angle-0-2pi (atan (coord-y coordinate) (coord-x coordinate)))))
+ (cons
+ (* radius (cos (+ angle degrees-in-radians)))
+ (* radius (sin (+ angle degrees-in-radians))))))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; trig
+
+(define-public PI (* 4 (atan 1)))
+
+(define-public TWO-PI (* 2 PI))
+
+(define-public PI-OVER-TWO (/ PI 2))
+
+(define-public THREE-PI-OVER-TWO (* 3 PI-OVER-TWO))
+
+(define-public (cyclic-base-value value cycle)
+ "Takes a value and modulo-maps it between 0 and base."
+ (if (< value 0)
+ (cyclic-base-value (+ value cycle) cycle)
+ (if (>= value cycle)
+ (cyclic-base-value (- value cycle) cycle)
+ value)))
+
+(define-public (angle-0-2pi angle)
+ "Takes an angle in radians and maps it between 0 and 2pi."
+ (cyclic-base-value angle TWO-PI))
+
+(define-public (angle-0-360 angle)
+ "Takes an angle in radians and maps it between 0 and 2pi."
+ (cyclic-base-value angle 360.0))
+
+(define-public PI-OVER-180 (/ PI 180))
+
+(define-public (degrees->radians angle-degrees)
+ "Convert the given angle from degrees to radians"
+ (* angle-degrees PI-OVER-180))
+
+(define-public (ellipse-radius x-radius y-radius angle)
+ (/
+ (* x-radius y-radius)
+ (sqrt
+ (+ (* (expt y-radius 2)
+ (* (cos angle) (cos angle)))
+ (* (expt x-radius 2)
+ (* (sin angle) (sin angle)))))))
+
+(define-public (polar->rectangular radius angle-in-degrees)
+ "Convert polar coordinate @code{radius} and @code{angle-in-degrees}
+ to (x-length . y-length)"
+ (let ((complex (make-polar
+ radius
+ (degrees->radians angle-in-degrees))))
+ (cons
+ (real-part complex)
+ (imag-part complex))))
+
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; string
(define-public (car< a b)
(< (car a) (car b)))
+(define-public (car<= a b)
+ (<= (car a) (car b)))
+
(define-public (symbol<? lst r)
(string<? (symbol->string lst) (symbol->string r)))
;;; FONT may be font smob, or pango font string...
(define-public (font-name-style font)
- ;; FIXME: ughr, barf: feta-alphabet is actually emmentaler
- (if (and (string? font)
- (string-prefix? "feta-alphabet" font))
- (string-append "emmentaler"
- "-"
- (substring font
- (string-length "feta-alphabet")
- (string-length font)))
+ (if (string? font)
+ (string-downcase font)
(let* ((font-name (ly:font-name font))
(full-name (if font-name font-name (ly:font-file-name font))))
- (if (string-prefix? "Aybabtu" full-name)
- "aybabtu"
- (string-downcase full-name)))))
+ (string-downcase full-name))))
(define-public (modified-font-metric-font-scaling font)
(let* ((designsize (ly:font-design-size font))
projects / lilypond.git / blobdiff