;;;; This file is part of LilyPond, the GNU music typesetter. ;;;; ;;;; Copyright (C) 2000--2014 Han-Wen Nienhuys ;;;; ;;;; 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 . ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; jazz-part 2 ;; ;; after Klaus Ignatzek, Die Jazzmethode fuer Klavier 1. ;; ;; The idea is: split chords into ;; ;; ROOT PREFIXES MAIN-NAME ALTERATIONS SUFFIXES ADDITIONS ;; ;; and put that through a layout routine. ;; ;; the split is a procedural process, with lots of set!. ;; ;; todo: naming is confusing: steps (0 based) vs. steps (1 based). (define (pitch-step p) "Musicological notation for an interval. Eg. C to D is 2." (+ 1 (ly:pitch-steps p))) (define (get-step x ps) "Does PS have the X step? Return that step if it does." (if (null? ps) #f (if (= (- x 1) (ly:pitch-steps (car ps))) (car ps) (get-step x (cdr ps))))) (define (replace-step p ps) "Copy PS, but replace the step of P in PS." (if (null? ps) '() (let* ((t (replace-step p (cdr ps)))) (if (= (ly:pitch-steps p) (ly:pitch-steps (car ps))) (cons p t) (cons (car ps) t))))) (define (remove-step x ps) "Copy PS, but leave out the Xth step." (if (null? ps) '() (let* ((t (remove-step x (cdr ps)))) (if (= (- x 1) (ly:pitch-steps (car ps))) t (cons (car ps) t))))) (define-public (ignatzek-chord-names in-pitches bass inversion context) (define (remove-uptil-step x ps) "Copy PS, but leave out everything below the Xth step." (if (null? ps) '() (if (< (ly:pitch-steps (car ps)) (- x 1)) (remove-uptil-step x (cdr ps)) ps))) (define name-root (ly:context-property context 'chordRootNamer)) (define name-note (let ((nn (ly:context-property context 'chordNoteNamer))) (if (eq? nn '()) ;; replacing the next line with name-root gives guile-error...? -rz ;; apparently sequence of defines is equivalent to let, not let* ? -hwn (ly:context-property context 'chordRootNamer) ;; name-root nn))) (define (compact-name-root pitch scale) (let* ((alt (ly:pitch-alteration pitch))) (make-line-markup (list (make-bold-markup (make-scale-markup '(0.5 . 1) (make-simple-markup (vector-ref #("C" "D" "E" "F" "G" "A" "B") (ly:pitch-notename pitch))))) (if (= alt 0) (make-hspace-markup 0.1) (make-line-markup (list (make-hspace-markup 0.1) (make-fontsize-markup -7 (make-raise-markup 1.2 ;(* 1 scale) (alteration->text-accidental-markup alt))) (make-hspace-markup -0.5)))))))) (define (name-inversion pitch scale) (let* ((alt (ly:pitch-alteration pitch))) (make-line-markup (list (make-raise-markup 1;1.5 (make-scale-markup '(0.75 . 0.5) (make-bold-markup (make-simple-markup "/")))) (make-hspace-markup -0.3) (make-raise-markup 0.5 (make-bold-markup (make-scale-markup '(0.4 . 0.6) (make-simple-markup (vector-ref #("C" "D" "E" "F" "G" "A" "B") (ly:pitch-notename pitch)))))) (make-raise-markup 0.5 (if (= alt NATURAL) (make-hspace-markup 2) (make-line-markup (list (make-hspace-markup 0.1) (make-fontsize-markup -7 (if (= alt SHARP) (make-raise-markup 0.1 (alteration->text-accidental-markup alt)) (make-raise-markup 0.2 (alteration->text-accidental-markup alt)))))))))))) (define (is-natural-alteration? p) (= (natural-chord-alteration p) (ly:pitch-alteration p))) (define (ignatzek-format-chord-name root prefix-modifiers main-name alteration-pitches addition-pitches suffix-modifiers bass-pitch lowercase-root?) "Format for the given (lists of) pitches. This is actually more work than classifying the pitches." (define (filter-main-name p) "The main name: don't print anything for natural 5 or 3." (if (or (not (ly:pitch? p)) (and (is-natural-alteration? p) (or (= (pitch-step p) 5) (= (pitch-step p) 3)))) '() (list (name-step p)))) (define (glue-word-to-step word x) (make-line-markup (list (make-simple-markup word) (name-step x)))) (define (suffix-modifier->markup mod) (if (or (= 4 (pitch-step mod)) (= 2 (pitch-step mod))) (glue-word-to-step "sus" mod) (glue-word-to-step "huh" mod))) (define (prefix-modifier->markup mod) (if (and (= 3 (pitch-step mod)) (= FLAT (ly:pitch-alteration mod))) (if lowercase-root? empty-markup (ly:context-property context 'minorChordModifier)) (make-simple-markup "huh"))) (define (filter-alterations alters) "Filter out uninteresting (natural) pitches from ALTERS." (define (altered? p) (not (is-natural-alteration? p))) (if (null? alters) '() (let* ((lst (filter altered? alters)) (lp (last-pair alters))) ;; we want the highest also if unaltered (if (and (not (altered? (car lp))) (> (pitch-step (car lp)) 5)) (append lst (last-pair alters)) lst)))) (define (name-step pitch) (define (step-alteration pitch) (- (ly:pitch-alteration pitch) (natural-chord-alteration pitch))) (let* ((num-markup (make-simple-markup (number->string (pitch-step pitch)))) (args (list num-markup)) (total (if (= (ly:pitch-alteration pitch) 0) (if (= (pitch-step pitch) 7) (list (ly:context-property context 'majorSevenSymbol)) args) (cons (accidental->markup (step-alteration pitch)) args)))) (make-line-markup total))) (define (markup-formatting sep root-markup prefixes to-be-raised-stuff bass-pitch) (define bass-inv #f) (define slashsep (ly:context-property context 'slashChordSeparator)) (define scale (ly:context-property context 'chordCompactScale)) (if (pair? scale) (begin (set! bass-inv (if (ly:pitch? bass-pitch) (name-inversion bass-pitch scale) empty-markup)) (make-with-dimensions-markup '(0 . 0) '(0 . 0) (make-scale-markup scale (make-combine-markup (make-line-markup (list root-markup (make-scale-markup '(0.4 . 0.6) (make-bold-markup (conditional-kern-before (markup-join prefixes sep) (and (not (null? prefixes)) (= (ly:pitch-alteration root) NATURAL)) (ly:context-property context 'chordPrefixSpacer)))) (make-scale-markup '(0.4 . 0.6) (make-bold-markup to-be-raised-stuff)))) (make-raise-markup -2 bass-inv))))) (begin (set! bass-inv (if (ly:pitch? bass-pitch) (list slashsep (name-note bass-pitch #f)) '())) (make-line-markup (append (list root-markup (conditional-kern-before (markup-join prefixes sep) (and (not (null? prefixes)) (= (ly:pitch-alteration root) NATURAL)) (ly:context-property context 'chordPrefixSpacer)) (make-super-markup to-be-raised-stuff)) bass-inv))))) (let* ((sep (ly:context-property context 'chordNameSeparator)) (slashsep (ly:context-property context 'slashChordSeparator)) (scale (ly:context-property context 'chordCompactScale)) (root-markup (if (pair? scale) (compact-name-root root scale) (name-root root lowercase-root?))) (add-pitch-prefix (ly:context-property context 'additionalPitchPrefix)) (add-markups (map (lambda (x) (glue-word-to-step add-pitch-prefix x)) addition-pitches)) (filtered-alterations (filter-alterations alteration-pitches)) (alterations (map name-step filtered-alterations)) (suffixes (map suffix-modifier->markup suffix-modifiers)) (prefixes (map prefix-modifier->markup prefix-modifiers)) (main-markups (filter-main-name main-name)) (to-be-raised-stuff (markup-join (append main-markups alterations suffixes add-markups) sep))) (markup-formatting sep root-markup prefixes to-be-raised-stuff bass-pitch))) (define (ignatzek-format-exception root exception-markup bass-pitch lowercase-root?) (define scale (ly:context-property context 'chordCompactScale)) (define bass-inv #f) (if (pair? scale) ;;;compact: (begin (set! bass-inv (if (ly:pitch? bass-pitch) (name-inversion bass-pitch scale) empty-markup)) (make-with-dimensions-markup '(0 . 0) '(0 . 0) (make-scale-markup scale (make-combine-markup (make-line-markup (list (compact-name-root root scale) exception-markup)) (make-raise-markup -2 bass-inv))))) ;;; non compact: (make-line-markup `( ,(name-root root lowercase-root?) ,exception-markup . ,(if (ly:pitch? bass-pitch) (list (ly:context-property context 'slashChordSeparator) (name-note bass-pitch #f)) '()))))) (let* ((root (car in-pitches)) (pitches (map (lambda (x) (ly:pitch-diff x root)) (cdr in-pitches))) (lowercase-root? (and (ly:context-property context 'chordNameLowercaseMinor) (let ((third (get-step 3 pitches))) (and third (= (ly:pitch-alteration third) FLAT))))) (exceptions (ly:context-property context 'chordNameExceptions)) (exception (assoc-get pitches exceptions)) (prefixes '()) (suffixes '()) (add-steps '()) (main-name #f) (bass-note (if (ly:pitch? inversion) inversion bass)) (alterations '())) (if exception (ignatzek-format-exception root exception bass-note lowercase-root?) (begin ;; no exception. ;; handle sus4 and sus2 suffix: if there is a 3 together with ;; sus2 or sus4, then we explicitly say add3. (for-each (lambda (j) (if (get-step j pitches) (begin (if (get-step 3 pitches) (begin (set! add-steps (cons (get-step 3 pitches) add-steps)) (set! pitches (remove-step 3 pitches)))) (set! suffixes (cons (get-step j pitches) suffixes))))) '(2 4)) ;; do minor-3rd modifier. (if (and (get-step 3 pitches) (= (ly:pitch-alteration (get-step 3 pitches)) FLAT)) (set! prefixes (cons (get-step 3 pitches) prefixes))) ;; lazy bum. Should write loop. (cond ((get-step 7 pitches) (set! main-name (get-step 7 pitches))) ((get-step 6 pitches) (set! main-name (get-step 6 pitches))) ((get-step 5 pitches) (set! main-name (get-step 5 pitches))) ((get-step 4 pitches) (set! main-name (get-step 4 pitches))) ((get-step 3 pitches) (set! main-name (get-step 3 pitches)))) (let* ((3-diff? (lambda (x y) (= (- (pitch-step y) (pitch-step x)) 2))) (split (split-at-predicate 3-diff? (remove-uptil-step 5 pitches)))) (set! alterations (append alterations (car split))) (set! add-steps (append add-steps (cdr split))) (set! alterations (delq main-name alterations)) (set! add-steps (delq main-name add-steps)) ;; chords with natural (5 7 9 11 13) or leading subsequence. ;; etc. are named by the top pitch, without any further ;; alterations. (if (and (ly:pitch? main-name) (= 7 (pitch-step main-name)) (is-natural-alteration? main-name) (pair? (remove-uptil-step 7 alterations)) (every is-natural-alteration? alterations)) (begin (set! main-name (last alterations)) (set! alterations '()))) (ignatzek-format-chord-name root prefixes main-name alterations add-steps suffixes bass-note lowercase-root?))))))