\version "2.18"

\language "deutsch"

#(ly:set-option 'relative-includes #t)

\include "../lilypond-custom-includes/categories.ly"

compatibilityMode =
#(define-void-function (parser location) ()
(if (< (list-ref (ly:version) 1) 24)
     (ly:parser-parse-string (if (< (list-ref (ly:version) 1) 19) (ly:parser-clone parser) (ly:parser-clone))
      (string-concatenate
       (list "\\include \"" "./legacy-lilypond-compatibility.ly" "\"")))))
\compatibilityMode

\include "./styles.ly"

#(define (lookup-var varsym default)
  (let ((value (assoc-ref (hash-map->list cons (struct-ref (current-module) 0)) varsym)))
      (if value (variable-ref value) default)))

globalSize = #(lookup-var 'globalSize 15)
lyricSize = #(lookup-var 'lyricSize 1.6)
showCategoryImages = #(lookup-var 'showCategoryImages #t)

% check if we have a StandAlone compile or if variable noStandaloneOutput is set
#(define isStandAlone (not (lookup-var 'noStandaloneOutput #f)))

#(if (< (list-ref (ly:version) 1) 19)
     (case song-style
       ((börnel) (set-default-paper-size "b6" 'landscape))
       ((bock) (set-default-paper-size "a6" 'landscape)))
     (case song-style
       ((börnel) (set-default-paper-size "b6landscape"))
       ((bock) (set-default-paper-size "a6landscape")))
     )

#(set-global-staff-size globalSize)

#(define-markup-command (print-songinfo layout props) ()
 (interpret-markup layout props
   (let (
         (blockwidth (* (chain-assoc-get 'header:songinfo-size-factor props 0.9) (ly:output-def-lookup layout 'line-width)))
         (infotext (chain-assoc-get 'header:songinfo props #f))
         (poet (chain-assoc-get 'header:poet props #f))
         (composer (chain-assoc-get 'header:composer props #f))
         (poet-and-composer-stacked (chain-assoc-get 'header:poet-and-composer-stacked props #f))
         (between-poet-and-composer-markup (chain-assoc-get 'header:between-poet-and-composer-markup props (make-hspace-markup 3)))
         (copyright (chain-assoc-get 'header:copyright props #f)))
     (if (chain-assoc-get 'page:is-bookpart-last-page props #f)
         (markup #:override '(baseline-skip . 3.0) (
             make-fontsize-markup (case song-style ((börnel) -3.5) ((bock) -1.5))
             ;(symbol->keyword (case song-style ((börnel) 'roman) ((bock) 'sans)))
             ((lambda (m) (case song-style ((börnel) (make-roman-markup m)) ((bock) (make-sans-markup m))))
             ;%\override #'(line-width . 92) \wordwrap-field #symbol
             (make-column-markup (list
               (make-line-markup
                (list
                 (if (and poet (not (and (string? poet) (string-null? poet)))) (markup poet between-poet-and-composer-markup) "")
                 (if (and composer (not poet-and-composer-stacked)) composer ""))
               )
               (if (and composer poet-and-composer-stacked) (make-line-markup (list composer)) "")
               (make-override-markup `(line-width . ,blockwidth) (make-justify-string-markup (string-append
                 (if (and copyright (not (and (string? copyright) (string-null? copyright)))) (ly:format "© ~a\n\n" copyright) "")
                 (if infotext infotext "")
               )))
             )))
           )
         )
       (make-null-markup))))
)

% songfilename verfügbar machen
#(define-markup-list-command (setsongfilename layout props songfilename markuplist)
  (string? markup-list?)
  (interpret-markup-list layout (prepend-alist-chain 'songfilename songfilename props) markuplist))

#(define-markup-command (customEps layout props ysize filename)(number? string?)
   #:properties ((songfilename "")
                 (defaultmarkup #f))
   (interpret-markup layout props
     (let ((filepath (if (string-null? songfilename)
                          filename
                          (ly:format "../../lieder/~a/~a" songfilename filename))))
       (if (file-exists? filepath)
             (make-epsfile-markup Y ysize filepath)
             (if defaultmarkup
                 defaultmarkup
                 (ly:format "file does not exist ~a" filepath))
))))

#(define-markup-command (bookTitleMarkupCustom layout props)()
   (interpret-markup layout
     (prepend-alist-chain 'defaultmarkup #{
\markup {
  \override #'(baseline-skip . 3.5)
  \center-column {
    \override #`(font-name . ,(case song-style ((börnel) "Oregano") ((bock) "Britannic T. custom"))) { \fontsize #6 \fromproperty #'header:title }
    \large \bold \fromproperty #'header:subtitle
    \smaller \bold \fromproperty #'header:subsubtitle
  }
}
                           #}
     (prepend-alist-chain 'songfilename (chain-assoc-get 'header:songfilename props "") props))
     (make-column-markup
       (list
         (make-vspace-markup (chain-assoc-get 'header:titletopspace props 0))
         (make-customEps-markup (chain-assoc-get 'header:titlesize props 3.5) "titel.eps")
     ))
))

#(define-markup-command (category-image layout props size category)(number? string?)
   (interpret-markup layout props
     (if isStandAlone
       (make-epsfile-markup Y size
         (category-image-path category))
       (make-epsfileref-markup Y size
         (category-image-path category)))))

#(define-markup-command (category-images layout props)()
   (interpret-markup layout props
     (if showCategoryImages
       (make-line-markup (map (lambda (category) (make-category-image-markup 5 category))
           (string-tokenize (chain-assoc-get 'header:categories props ""))))
       (make-null-markup))))

#(define-markup-command (pagecenter layout props stuff)(markup?)
   (interpret-markup layout props
     (let ((halfpaperheight (/ (ly:output-def-lookup layout 'paper-height) 2))
           (halfstuffheight (/ (interval-length (ly:stencil-extent (interpret-markup layout props stuff) Y)) 2)))
       (make-fill-line-markup (list (make-pad-to-box-markup '(0 . 0) (cons (- (- halfpaperheight halfstuffheight)) (+ halfpaperheight halfstuffheight)) stuff)))
   )))

#(define-markup-command (print-pagenumber layout props)()
  (let ((label (chain-assoc-get 'header:myindexlabel props #f)))
   (interpret-markup layout props
     (markup #:large #:bold
        (if label
         (make-custom-page-number-markup label (chain-assoc-get 'page:page-number props 0))
         (make-fromproperty-markup 'page:page-number-string)
        )
   ))))

#(define pdf-encode
   (if (< (list-ref (ly:version) 1) 24)
       ly:encode-string-for-pdf
   (@@ (lily framework-ps) pdf-encode)))
% PDF tags
#(define-markup-command (title-to-pdf-toc layout props title) (string?)
     (ly:make-stencil
      (list 'embedded-ps
             (ly:format
              "[/Action /GoTo /View [/Fit] /Title <~a> /OUT pdfmark"
               (fold
                (lambda (ch hexout)
                  (string-append hexout
                   (format #f "~2,'0x" (char->integer ch))))
                 ""
                 (string->list
                   (pdf-encode title)))))
      empty-interval empty-interval
      ;'(0 . 0) '(0 . 0)
      ))

#(define-markup-command (title-with-category-images layout props right)(boolean?)
   (interpret-markup layout props
     (let* ((title (chain-assoc-get 'header:title props #f))
            (pdfbookmark (chain-assoc-get 'header:songfilename props title)))
     (if title
     ;(if (chain-assoc-get 'header:categories props #f)
       (if right
         #{\markup { \title-to-pdf-toc #pdfbookmark \fill-line \general-align #Y #UP { \null \bookTitleMarkupCustom \category-images } } #}
         #{\markup { \title-to-pdf-toc #pdfbookmark \fill-line \general-align #Y #UP { \category-images \bookTitleMarkupCustom \null } } #})
       ;#{\markup \fill-line \general-align #Y #UP { \null \bookTitleMarkupCustom \null } #})
      ;(make-null-markup))
      #{ \markup { " " } #})
     )))

#(define (default-pango size)
   (case song-style
     ((börnel)
    (make-pango-font-tree ;"FreeSans"
                          ;"Spectral"
                          "Liberation Sans"
                          "TeX Gyre Heros"
                          "Luxi Mono"
                           (/ size 20)))
     ((bock)
    (make-pango-font-tree ;"FreeSans"
                          ;"Spectral"
                          "TimesNewRomanPS"
                          "Arial"
                          "Luxi Mono"
                           (/ size 20)))))

\paper {
  #(define fonts (default-pango globalSize))
  %annotate-spacing = ##t
  % spacing stuff
  lyric-size = #lyricSize
  two-sided = ##t
  inner-margin = 1.5\cm
  outer-margin = #(case song-style ((börnel) 5) ((bock) 8))
  binding-offset = 0\cm
  top-margin = #(case song-style ((börnel) 5) ((bock) 8))
  bottom-margin = #(case song-style ((börnel) 5) ((bock) 8))
  system-system-spacing = #'((basic-distance . 10) (padding . 1.5))
  markup-system-spacing = #'((basic-distance . 1))
  score-markup-spacing = #'((padding . 2))
  top-markup-spacing = #'((basic-distance . 0) (minimum-distance . 0) (padding . 0))
 % top-system-spacing = #'((basic-distance . 0) (minimum-distance . 0) (padding . -3))
  %top-system-spacing #'stretchability = #30
 % last-bottom-spacing #'stretchability = #0

  print-first-page-number = ##t
  first-page-number = #0

  bookTitleMarkup = \markup \null

  scoreTitleMarkup = \markup \null

  oddHeaderMarkup = \markup { \if \on-first-page-of-part \title-with-category-images ##t }
  evenHeaderMarkup = \markup { \if \on-first-page-of-part \title-with-category-images ##f }
  oddFooterMarkup = \markup {
    \fill-line {
      \line { \null }
      \line { \general-align #Y #DOWN \print-songinfo }
      \line { \if \should-print-page-number \print-pagenumber }
    }
  }
  evenFooterMarkup  = \markup {
    \fill-line {
      \line { \if \should-print-page-number \print-pagenumber }
      \line { \general-align #Y #DOWN \print-songinfo }
      \line { \null }
    }
  }
}

% Akkorde können auch geklammert sein
#(define (parenthesis-ignatzek-chord-names in-pitches bass inversion context)
(markup #:line ( "(" (ignatzek-chord-names in-pitches bass inversion context) ")" )))
klamm = #(define-music-function (parser location chords) (ly:music?)
#{
	\set chordNameFunction = #parenthesis-ignatzek-chord-names
	$chords
	\set chordNameFunction = #ignatzek-chord-names
#})

bchord =
#(define-music-function (parser location chords) (ly:music?)
#{
	\override ChordName.font-series = #'bold
	$chords
	\revert ChordName.font-series
#})

% kleine Mollakkorde und Alteration ausgeschrieben
#(define (note-name->german-markup-nosym pitch lowercase?)
   (define (pitch-alteration-semitones pitch) (inexact->exact (round (* (ly:pitch-alteration pitch) 2))))
   (define (accidental->markup alteration name)
     (if (= alteration 0)
         (make-line-markup (list empty-markup))
          (if (= alteration FLAT)
              (if (equal? name "B")
                  ""
              ;   (make-line-markup (list (make-hspace-markup 0.2)
              ;     (make-tiny-markup (make-raise-markup 1.2
              ;     (make-musicglyph-markup (assoc-get alteration standard-alteration-glyph-name-alist ""))))
              ;   ))
              (if (or (equal? name "E") (equal? name "A")) "s" "es"))
              "is")
         ))
   (define (conditional-string-downcase str condition)
     (if condition (string-downcase str) str))

   (let* ((name (ly:pitch-notename pitch))
         (alt-semitones  (pitch-alteration-semitones pitch))
	 (n-a (if (member (cons name alt-semitones) `((6 . -1) (6 . -2)))
		  (cons 7 (+ 0 alt-semitones))
		  (cons name alt-semitones))))
    (make-line-markup
     (list
      (make-simple-markup
       (conditional-string-downcase
		(vector-ref #("C" "D" "E" "F" "G" "A" "H" "B") (car n-a))
		lowercase?))
       (accidental->markup (/ (cdr n-a) 2) (vector-ref #("C" "D" "E" "F" "G" "A" "H" "B") (car n-a)) ))))
)

% additional bass notes should get uppercased
#(define (bassnote-name->german-markup-nosym pitch lowercase?)(note-name->german-markup-nosym pitch #f))

%% http://lsr.dsi.unimi.it/LSR/Item?id=336
%% see also http://code.google.com/p/lilypond/issues/detail?id=1228

%% Usage:
%%   \new Staff \with {
%%     \override RestCollision.positioning-done = #merge-rests-on-positioning
%%   } << \somevoice \\ \othervoice >>
%% or (globally):
%%   \layout {
%%     \context {
%%       \Staff
%%       \override RestCollision.positioning-done = #merge-rests-on-positioning
%%     }
%%   }
%%
%% Limitations:
%% - only handles two voices
%% - does not handle multi-measure/whole-measure rests

#(define (rest-score r)
  (let ((score 0)
	(yoff (ly:grob-property-data r 'Y-offset))
	(sp (ly:grob-property-data r 'staff-position)))
    (if (number? yoff)
	(set! score (+ score 2))
	(if (eq? yoff 'calculation-in-progress)
	    (set! score (- score 3))))
    (and (number? sp)
	 (<= 0 2 sp)
	 (set! score (+ score 2))
	 (set! score (- score (abs (- 1 sp)))))
    score))

#(define (merge-rests-on-positioning grob)
  (let* ((can-merge #f)
	 (elts (ly:grob-object grob 'elements))
	 (num-elts (and (ly:grob-array? elts)
			(ly:grob-array-length elts)))
	 (two-voice? (= num-elts 2)))
    (if two-voice?
	(let* ((v1-grob (ly:grob-array-ref elts 0))
	       (v2-grob (ly:grob-array-ref elts 1))
	       (v1-rest (ly:grob-object v1-grob 'rest))
	       (v2-rest (ly:grob-object v2-grob 'rest)))
	  (and
	   (ly:grob? v1-rest)
	   (ly:grob? v2-rest)
	   (let* ((v1-duration-log (ly:grob-property v1-rest 'duration-log))
		  (v2-duration-log (ly:grob-property v2-rest 'duration-log))
		  (v1-dot (ly:grob-object v1-rest 'dot))
		  (v2-dot (ly:grob-object v2-rest 'dot))
		  (v1-dot-count (and (ly:grob? v1-dot)
				     (ly:grob-property v1-dot 'dot-count -1)))
		  (v2-dot-count (and (ly:grob? v2-dot)
				     (ly:grob-property v2-dot 'dot-count -1))))
	     (set! can-merge
		   (and
		    (number? v1-duration-log)
		    (number? v2-duration-log)
		    (= v1-duration-log v2-duration-log)
		    (eq? v1-dot-count v2-dot-count)))
	     (if can-merge
		 ;; keep the rest that looks best:
		 (let* ((keep-v1? (>= (rest-score v1-rest)
				      (rest-score v2-rest)))
			(rest-to-keep (if keep-v1? v1-rest v2-rest))
			(dot-to-kill (if keep-v1? v2-dot v1-dot)))
		   ;; uncomment if you're curious of which rest was chosen:
		   ;;(ly:grob-set-property! v1-rest 'color green)
		   ;;(ly:grob-set-property! v2-rest 'color blue)
		   (ly:grob-suicide! (if keep-v1? v2-rest v1-rest))
		   (if (ly:grob? dot-to-kill)
		       (ly:grob-suicide! dot-to-kill))
		   (ly:grob-set-property! rest-to-keep 'direction 0)
		   (ly:rest::y-offset-callback rest-to-keep)))))))
    (if can-merge
	#t
	(ly:rest-collision::calc-positioning-done grob))))

generalLayout = \layout {
  indent = #0
  % Akkordeinstellungen
  \context {
    \ChordNames
    \semiGermanChords
    \override ChordName.font-size = #(case song-style ((börnel) 0) ((bock) 3))
    \override ChordName.font-series = #(case song-style ((börnel) 'bold) ((bock) 'normal))
    \override ChordName.font-family = #(case song-style ((börnel) 'sans) ((bock) 'roman))
    chordNameLowercaseMinor = ##t
    chordChanges = ##t
    % eigenen chordRootNamer damit F# = Fis und Gb = Ges (also alteration ausgeschrieben)
    chordRootNamer = #note-name->german-markup-nosym
    chordNoteNamer = #bassnote-name->german-markup-nosym
    majorSevenSymbol = "maj7"
    % der baseline-skip der Akkorde beeinflusst, wie hoch die Hochstellung ist
    \override ChordName.baseline-skip = #1.0
  }
  \context {
    \Lyrics
    \override LyricText.font-size = #lyricSize
    \override StanzaNumber.font-size = #lyricSize
    \override StanzaNumber.font-family = #(case song-style ((börnel) 'roman) ((bock) 'sans))
    \override LyricText.font-family = #(case song-style ((börnel) 'roman) ((bock) 'sans))
    \override LyricExtender.minimum-length = 0
  }
  \context {
    \Staff
    \override RestCollision.positioning-done = #merge-rests-on-positioning
    \accidentalStyle modern
  }
  \context {
    \Score
    \remove "Bar_number_engraver"
    \RemoveEmptyStaves
    \override VerticalAxisGroup.remove-first = ##t
    \overrideTimeSignatureSettings
      4/4               % timeSignatureFraction
      1/4               % baseMomentFraction
      #'(1 1 1 1)       % beatStructure
      #'()		% beamExceptions
    \overrideTimeSignatureSettings
      3/4               % timeSignatureFraction
      1/4               % baseMomentFraction
      #'(1 1 1 1)       % beatStructure
      #'()		% beamExceptions
  }
  \context {
    \Voice
    % ich will lines breaken wie ich will!
    \remove "Forbid_line_break_engraver"
  }
}

verseChordLayout = \layout {
  \generalLayout
  \context {
    \ChordNames
    \override ChordName.font-size = #(case song-style ((börnel) 0) ((bock) 2))
  }
}

LAYOUT = \layout { \generalLayout }

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% kleine Helferlein:

textp = \lyricmode { \markup { \raise #1 \musicglyph #"rests.3" } }

% zweite Stimme alles grau
secondVoiceStyle = {
  \override NoteHead.color = #grey
  \override Stem.color = #grey
  \override Flag.color = #grey
  \override Beam.color = #grey
}

firstVoiceStyle = {
  \override NoteHead.color = #black
  \override Stem.color = #black
  \override Flag.color = #black
  \override Beam.color = #black
}

% einzelne Noten innerhalb von \secondVoiceStyle mit schwarzem statt grauem Kopf
schwarzkopf =
#(define-music-function (parser location noten) (ly:music?)
#{
 \revert NoteHead.color
 $noten
 \override NoteHead.color = #grey
#})

% guile regular expressions aktivieren:
#(use-modules (ice-9 regex))
%{
% parsing line by line
#(define-markup-command (wrap-newline layout props text) (string?)
   "Text Zeile für Zeile parsen"
   (interpret-markup layout props
     (ly:parse-string-expression (if (< (list-ref (ly:version) 1) 19) (ly:parser-clone parser) (ly:parser-clone)) (string-append "\\markup { \\column { \\line {"
               (regexp-substitute/global #f "\n"
                  text
                'pre "} \\line {" 'post )
             "} } }" ))
   )
)
%}

% parsing line by line
#(define-markup-command (wrap-newline layout props text) (string?)
   "Text Zeile für Zeile parsen"
   (interpret-markup layout props
     #{ \markup { \column {
     $(let ((verse-markup-string (string-append "\\line { "
            (regexp-substitute/global #f "\n"
               text
             'pre " } \\line { " 'post )
          " \\size-box-to-box ##f ##t \"\" \"Agj\" }" )))
       ;(ly:parse-string-expression (if (< (list-ref (ly:version) 1) 19) (ly:parser-clone parser) (ly:parser-clone)) verse-markup-string))
       (if (< (list-ref (ly:version) 1) 19) (ly:parser-include-string parser verse-markup-string) (ly:parser-include-string verse-markup-string)))
     }}#}
   )
)

#(define-markup-command (size-box-to-box layout props use-x use-y abox bbox)
  (boolean? boolean? markup? markup?)
  (let* ((ma (interpret-markup layout props abox))
         (mb (interpret-markup layout props bbox))
         (ax (ly:stencil-extent ma X))
         (ay (ly:stencil-extent ma Y))
         (bx (ly:stencil-extent mb X))
         (by (ly:stencil-extent mb Y))
         (halfdiffabx (* (- (interval-length bx) (interval-length ax)) 0.5)))
    (ly:stencil-translate (ly:make-stencil (ly:stencil-expr ma)
                     (if use-x
                          (if (< halfdiffabx 0)
                              (cons
                                (- (interval-bound ax DOWN) halfdiffabx)
                                (+ (interval-bound ax UP) halfdiffabx))
                              bx)
                       ax)
                     (if use-y by ay))
      (cons (if (and use-x (< halfdiffabx 0)) halfdiffabx 0) 0) )))

#(define-markup-command (size-box-to-box-left-aligned layout props use-x use-y abox bbox)
  (boolean? boolean? markup? markup?)
  (let* ((ma (interpret-markup layout props abox))
         (mb (interpret-markup layout props bbox))
         (ax (ly:stencil-extent ma X))
         (ay (ly:stencil-extent ma Y))
         (bx (ly:stencil-extent mb X))
         (by (ly:stencil-extent mb Y)))
    (ly:make-stencil (ly:stencil-expr ma)
                     (if use-x bx ax)
                     (if use-y by ay))
    ))

#(define-markup-command (size-box-to-box-style-dependent layout props use-x use-y abox bbox)
   (boolean? boolean? markup? markup?)
   (interpret-markup layout props
   (case song-style
     ((börnel) (make-size-box-to-box-markup use-x use-y abox bbox))
     ((bock) (make-size-box-to-box-left-aligned-markup use-x use-y abox bbox)))))

% Akkord mit Bunddiagramm anzeigen
#(define-markup-command (fret-chord layout props fret chord) (string? string?)
   (interpret-markup layout props
     #{ \markup { \override #'(baseline-skip . 2)
          \center-column {
            \score { \new ChordNames { #(if (< (list-ref (ly:version) 1) 19)
              (ly:parser-include-string parser (string-append "\\chordmode { s4 " chord " }"))
              (ly:parser-include-string (string-append "\\chordmode { s4 " chord " }"))
              ) } \layout { \generalLayout } }
            \override #'(fret-diagram-details . (
                     (barre-type . straight))) {
            \fret-diagram-terse #fret
            }
          }
        }
     #}))

% Akkorde in Strophen transponieren
#(define-markup-list-command (transpose layout props from to markuplist)
  (markup? markup? markup-list?)
  (interpret-markup-list layout (prepend-alist-chain 'transposition (cons from to) props) markuplist))

#(define-markup-command (chord-alignment-style-dependent layout props chord-with-text) (markup?)
   (interpret-markup layout props
   (case song-style
     ((börnel) (make-center-align-markup chord-with-text))
     ((bock) (make-left-align-markup chord-with-text)))))

% Text über Text mittig darstellen
#(define-markup-command (textup layout props text uptext) (markup? markup?)
   "Markup über Text mittig darstellen."
   (interpret-markup layout props
     #{\markup {
       \size-box-to-box-style-dependent ##t ##f
         \general-align #X #LEFT \override #`(direction . ,UP) \override #'(baseline-skip . 1.0) \dir-column \chord-alignment-style-dependent {
           \pad-to-box #'(0 . 0) #'(0 . 2.0) { #text }
           \size-box-to-box ##f ##t #uptext \score { \chords { g4:m a } \layout { \generalLayout } }
         }
         #text
       }
     #}
   ))

#(define-markup-command (anchor-x-between layout props arga argb)
   (markup? markup?)
   (let* ((la (interval-length (ly:stencil-extent (interpret-markup layout props arga) X)))
          (m (interpret-markup layout props (markup #:general-align Y DOWN arga argb (make-size-box-to-box-markup #t #t (markup #:null) arga))))
          (l (interval-length (ly:stencil-extent m X))))
            (ly:stencil-aligned-to m X (- (/ (* la 2) l) 1))
     ))

#(define-markup-command (stanza-raw layout props arg)
   (markup?)
   (interpret-markup layout props
     (if (and (string? arg) (string-null? arg))
         " "
         #{\markup
           \score { \new Lyrics { \lyricmode { \set stanza = #arg "" } } \layout { \generalLayout } }
         #}
     )))

#(define-markup-command (stanza layout props arg)
   (markup?)
   (interpret-markup layout props
     (make-size-box-to-box-markup #f #t (make-stanza-raw-markup arg) (make-stanza-raw-markup "x"))))

% Kompletten Vers mit Akkorden
#(define-markup-command (chordverse layout props stanza verse) (markup? string?)
   "Vers mit Akkorden"
   (let* ((fromto (chain-assoc-get 'transposition props #f))
          (transp (if fromto
                    (string-append "\\transpose " (car fromto) " " (cdr fromto))
                    "")))
   (interpret-markup layout props
     (markup #:override `(baseline-skip . ,(case song-style ((börnel) 5.0) ((bock) 5.5))) #:anchor-x-between #:stanza stanza
       (make-wrap-newline-markup
               (regexp-substitute/global #f "\\(( *)([^,()]*)( *),([^)]*)\\)"
                 (regexp-substitute/global #f "(([^ \n]*\\([^()]*\\)[^ \n]*)+)" verse
                                         'pre " \\concat { " 1 " } " 'post)
                'pre "\\textup \\line { \"" 1 "\" " 2 " \"" 3 "\" } \\score { " transp " \\chords { s4 " 4 " } \\layout { \\verseChordLayout } }" 'post))
     ))))

% Kompletter Vers aus dem Akkorde entfernt werden
#(define-markup-command (nochordverse layout props stanza verse) (markup? string?)
   "Vers ohne Akkorde"
   (interpret-markup layout props
     (markup #:override '(baseline-skip . 3.0) #:anchor-x-between #:stanza stanza
           #:wrap-newline (regexp-substitute/global #f "\\(([^,]*),([^)]*)\\)" verse 'pre 1 'post )
     )
   )
)

% hübsche Wiederholungszeichen für den Liedtext
repStart = "𝄆"
repStop = "𝄇"
%{
repStart = \markup { \raise #0.75 \override #'(word-space . 0.2) {
  \wordwrap { \vcenter { \override #'(word-space . 0.2) { \wordwrap {
    \filled-box #'(0 . 0.3) #'(0 . 2.5) #0 \filled-box #'(0 . 0.15) #'(0 . 2.5) #0 } }
                         %\override #'(baseline-skip . 1.3) \fontsize #-5 \column { "•" "•" }
                         \override #'(baseline-skip . 1.0) \column { \draw-circle #0.2 #0 ##t \draw-circle #0.2 #0 ##t }
                          } } } }

repStop = \markup { \rotate #180 \repStart }
%}

#(define-markup-command (verseformat layout props verse) (markup?)
   "Textformatierung für Strophen"
   (interpret-markup layout props
       ((lambda (m) (case song-style ((börnel) (make-roman-markup m)) ((bock) (make-sans-markup m)))) (make-fontsize-markup (ly:output-def-lookup layout 'lyric-size) verse))
   )
)

#(define-markup-command (group-verses layout props versegroup) (markup-list?)
   #:properties ((verse-cols 1)
                 (verse-vspace 1)
                 (verse-hspace 1)
                 (verse-ordering-horizontal #f))
   "Gruppiere Strophen in einem Markup auf Wunsch spaltenweise"
   (let ((h (make-hash-table verse-cols))
         (index 0)
         (column-item-count (ceiling (/ (length versegroup) verse-cols))))
     (for-each (lambda (el)
        (let ((i (if verse-ordering-horizontal
                     (modulo index verse-cols)
                     (floor (/ index column-item-count)))))
         (hashv-set! h i (cons el (hashv-ref h i (list)))) (set! index (+ index 1))))
       versegroup)
     (interpret-markup layout props
       (make-fill-line-markup (cons (make-verseformat-markup (make-line-markup
         (reverse (hash-fold (lambda (key value l)
             (cons (make-column-markup
                       (fold (lambda (v verses)
                          (cons v (if (null? verses)
                                      verses
                                      (cons (make-vspace-markup verse-vspace) verses))))
                        (list) value))
                    (if (null-list? l)
                        l
                        (cons (make-hspace-markup verse-hspace) l))))
           (list) h))))
                                (list))))))

%%%%%%%%%%%%%%%%% Pfeilezeugs
% http://lilypond.org/doc/v2.19/Documentation/snippets/vocal-music
#(define-markup-command (arrow-at-angle layout props angle-deg length fill)
   (number? number? boolean?)
   (let* (
           (PI-OVER-180 (/ (atan 1 1) 34))
           (degrees->radians (lambda (degrees) (* degrees PI-OVER-180)))
           (angle-rad (degrees->radians angle-deg))
           (target-x (* length (cos angle-rad)))
           (target-y (* length (sin angle-rad))))
     (interpret-markup layout props
       (markup
        #:translate (cons (/ target-x 2) (/ target-y 2))
        #:rotate angle-deg
        #:translate (cons (/ length -2) 0)
        #:concat (#:draw-line (cons length 0)
                   #:arrow-head X RIGHT fill)))))


splitStaffBarLineMarkup = \markup \with-dimensions #'(0 . 0) #'(0 . 0) {
  \combine
  \arrow-at-angle #45 #(sqrt 8) ##t
  \arrow-at-angle #-45 #(sqrt 8) ##t
}

splitStaffBarLine = {
  \once \override Staff.BarLine.stencil =
  #(lambda (grob)
     (ly:stencil-combine-at-edge
      (ly:bar-line::print grob)
      X RIGHT
      (grob-interpret-markup grob splitStaffBarLineMarkup)
      0))
  \break
}

convDownStaffBarLine = {
  \once \override Staff.BarLine.stencil =
  #(lambda (grob)
     (ly:stencil-combine-at-edge
      (ly:bar-line::print grob)
      X RIGHT
      (grob-interpret-markup grob #{
        \markup\with-dimensions #'(0 . 0) #'(0 . 0) {
          \translate #'(0 . -.13)\arrow-at-angle #-45 #(sqrt 8) ##t
        }#})
      0))
  \break
}

convUpStaffBarLine = {
  \once \override Staff.BarLine.stencil =
  #(lambda (grob)
     (ly:stencil-combine-at-edge
      (ly:bar-line::print grob)
      X RIGHT
      (grob-interpret-markup grob #{
        \markup\with-dimensions #'(0 . 0) #'(0 . 0) {
          \translate #'(0 . .14)\arrow-at-angle #45 #(sqrt 8) ##t
        }#})
      0))
  \break
}