Editing ChordNames in a ChordMarkup-context

Sometimes the possibility to enter chords not using the default ChordNames-context, but as text only is requested.<br />
This snippets provides some code to do so.

Obvious disadvantages are missing midi and it's not transposable.

<lilypond version="2.24.0" full>
#(define (markup-concat-join markups sep)
  "Return concat-markup of @var{markups}, joining them with markup @var{sep}"
  (if (pair? markups)
      (make-concat-markup (list-insert-separator markups sep))
      empty-markup))

#(define (pitch-accidental-markuplist pitch-strg context)
  (let* ((minor-chord-modifier
           (ly:context-property context 'minorChordModifier))
         (minor?
           (and (not (string-null? pitch-strg))
                (string=? "m" (string-take-right pitch-strg 1))))
         (pitch-markup
           (lambda (strg)
             (if minor?
                 (make-concat-markup 
                   (list (string-drop-right strg 1) minor-chord-modifier))
                 strg))))
  (cond
    ((string-null? pitch-strg) '())
    ((string-contains pitch-strg "is")
     (list (string-take pitch-strg 1)
           (make-smaller-markup
             (make-raise-markup 0.6 
               (make-musicglyph-markup "accidentals.sharp")))
           (if minor? minor-chord-modifier "")))
    ((or (string-contains pitch-strg "s")
         (string-ci=? (string-take pitch-strg 1) "B"))
     (list (string-take pitch-strg 1)
           (make-smaller-markup
             (make-raise-markup 0.3 
               (make-musicglyph-markup "accidentals.flat")))
           (if minor? minor-chord-modifier "")))
    (else (list (pitch-markup pitch-strg))))))
    
#(define chords->lyrics
  (lambda (text context)
    (if (not (string? text))
        text
        (let* ((slash-chord-separator
                 (ly:context-property context 'slashChordSeparator "/"))
               (chord-name-separator
                 (ly:context-property context 'chordNameSeparator ""))
               (major-seven-symbol
                 (ly:context-property context 'majorSevenSymbol #f))
               (chord-root-namer
                 (ly:context-property context 'chordRootNamer))
               (chord-note-namer
                 (ly:context-property context 'chordNoteNamer))
               (chrd&bass (string-split text #\/))
               (chrd (car chrd&bass))
               (root&adds (string-split chrd #\:))
               (bass
                 (if (pair? (cdr chrd&bass))
                     (cadr chrd&bass)
                     ""))
               (slash-bass 
                 (if (string-null? bass)
                     ""
                     (make-concat-markup
                       (cons 
                         slash-chord-separator 
                         (if (and (procedure? chord-note-namer)
                                  (eq? (procedure-name chord-note-namer) 
                                       'identity))
                             (list bass)
                             (pitch-accidental-markuplist bass context))))))
               (root (car root&adds))
               (root
                 (make-concat-markup 
                   (if (eq? (procedure-name chord-root-namer) 'identity)
                       (list root)
                       (pitch-accidental-markuplist root context))))
               (adds
                 (if (null? (cdr root&adds))
                     ""
                     (cadr root&adds)))
               (adds-list                                                     
                 (string-split adds #\.))
               (adds&alts
                 (map
                   (lambda (add)
                     (cond 
                       ((and (string=? add "7+") major-seven-symbol)
                        major-seven-symbol)
                       ((string-contains add "+")
                        (make-concat-markup
                          (list
                            (make-raise-markup 0.6 
                              (make-musicglyph-markup "accidentals.sharp"))
                            (string-delete #\+ add))))
                       ((string-contains add "-")
                        (make-concat-markup
                          (list
                            (make-raise-markup 0.3 
                              (make-musicglyph-markup "accidentals.flat"))
                            (string-delete #\- add))))
                       (else add)))
                   adds-list)))
        (make-concat-markup
          (list
            root
            (make-super-markup 
              (markup-concat-join adds&alts chord-name-separator))
            slash-bass))))))

#(define (Chords_lyrics_engraver context)
   (make-engraver
     (acknowledgers
       ((lyric-syllable-interface engraver grob source-engraver)
        (ly:grob-set-property! grob 'text
          (chords->lyrics (ly:grob-property grob 'text) context))))))


\layout {
  \context {
    \Lyrics
    \name "ChordMarkup"
    \consists \Chords_lyrics_engraver
    \override LyricText.font-family = #'sans
    \override LyricText.self-alignment-X = #LEFT
    %% some defaults:
    %slashChordSeparator = #"/"
    %majorSevenSymbol = #whiteTriangleMarkup
    %chordNameSeparator = #(make-hspace-markup 0.5)
    %minorChordModifier = #"m"
  }
  \context {
    \Score
    \accepts "ChordMarkup"
  }
  \context {
    \StaffGroup
    \accepts "ChordMarkup"
  }
  \context {
    \ChoirStaff
    \accepts "ChordMarkup"
  }
  %% others?
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\markup \bold \rounded-box \rounded-box \fill-line { 
  \column {
    "Generals for entering ChordNames in ChordMarkup-context:"
    "- Root is not capitalized, it's taken as entered!"
    "- Double-alteration (ases etc) as root is not supported"
    "- Input should be entered as string, otherwise numbers are taken as 
duration"
    \line {
      "- Durations are entered as usual for LyricText, i.e" 
      \typewriter "\lyricmode { \"c:sus4\"2 }"
      "is of duration 2"
    }
    }
  \null
}
    

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% CHORD-EXAMPLES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\header { tagline = ##f }

%% 1

simple-chrds =
<<
  \new ChordMarkup
    \lyricmode {
      C Cis D Dis E Eis F Fis G Gis A Ais B H h b 
      cism cesm hm "B:sus4"
    }
  \new ChordNames
    \chordmode {
      c cis d dis e eis f fis g gis a ais bes b b bes
      cis:m ces:m b:m bes:sus4
    }
  \new Staff
    \chordmode {
      c cis d dis e eis f fis g gis a ais bes b b bes
      cis:m ces:m b:m bes:sus4
    }
>>

\score {
  \simple-chrds
  \header {
    piece = \markup \rounded-box \fill-line { 
      \column {
        "In ChordMarkup minor-chords have to be entered like: cism"
        "Note the absence of \":\" here."
      }
      \null
    }
  }
  \layout { indent = 0 }
}

%% 2

keep-entered-root-chrds =
<<
  \new ChordMarkup
    \lyricmode {
      \set chordRootNamer = #identity
      C Cis cism "Cis:7.5-" "Cis:5-.7" "Es:7+.(13)/fis"
      \set chordNoteNamer = #identity
      "Es:7+.add13/Fis"
      G /e /es /d /F /E /Es /D
    }
  \new ChordNames
    \chordmode {
      c cis cis:m cis:7.5- cis:5-.7 ees:7+.13/fis
      ees:7+.13/fis g \repeat unfold 7 q
    }
  \new Staff
    \chordmode {
      c cis cis:m cis:7.5- cis:5-.7 ees:7+.13/fis
      ees:7+.13/fis g \repeat unfold 7 q
    }
>>

\score {
  \keep-entered-root-chrds
  \header {
    piece = \markup \rounded-box \fill-line { 
      \column {
        "To insist on the root as entered, set 'chordRootNamer' to 'identity'"
        "Rootless basses are possible"
        "To insist on the bass as entered, set 'chordNoteNamer' to 'identity'"
      }
      \null
    }
  }
  \layout { indent = 0 }
}

%% 3

change-defaults-chrds =
<<
  \new ChordMarkup
    \lyricmode {
      "C/E" \once \set slashChordSeparator = " with bass:" "C/E"
      "C:7+" \once \set majorSevenSymbol = "7<" "C:7+"
      "C:7.13" \once \set chordNameSeparator = "," "C:7.13"
      "cm:7.alt" 
        \once \set minorChordModifier = 
          #(markup #:fontsize -4 #:smallCaps "minor")
        "cm:7.alt"
    }
  \new ChordNames
    \chordmode {
      c:7+ c:7+
    }
  \new Staff
    \chordmode {
      c/+e c/+e c:7+ c:7+ c:7.13 c:7.13 c:m7 c:m7
    }
>>

\score {
  \change-defaults-chrds
  \header {
    piece = \markup \rounded-box \fill-line { 
      \column {
        "It's possible to change"
        "- slashChordSeparator"
        "- majorSevenSymbol"
        "- chordNameSeparator"
        "- minorChordModifier"
      }
      \null
    }
  }
  \layout { indent = 0 }
}

%% 4

other-example-chrds =
  \new ChordMarkup
    \lyricmode {
      "C:13" C:alt "C:7.alt" "Gm:7.(b5)/F"
    }

\score {
  \other-example-chrds
  \header { piece = \markup \rounded-box \fill-line { "Other examples" \null } }
  \layout { indent = 0 }
}
</lilypond>

[[Category:Chords]]
[[Category:Contexts and engravers]]
[[Category:Tweaks and overrides]]
[[Category:Scheme]]