Make it possible to override a stanza number

* add translation, interlude, bridge and meloverse
* fix rendering bugs

all_base_includes.ly

@@ -0,0 +1,24 @@
+#(define noStandaloneOutput (if (defined? 'noStandaloneOutput) noStandaloneOutput #f))
+
+#(if (defined? 'LAYOUT) #f (load (string-append (dirname (current-filename)) file-name-separator-string "json_parser.scm")))
+#(use-modules (json parser))
+\include "resolve_inherits.ly"
+\include "basic_format_and_style_settings.ly"
+\include "eps_file_from_song_dir.ly"
+\include "title_with_category_images.ly"
+\include "chord_settings.ly"
+\include "transposition.ly"
+\include "verses_with_chords.ly"
+\include "arrows_in_scores.ly"
+\include "swing_style.ly"
+\include "inline_score.ly"
+
+% reset important variables
+LAYOUT = \layout { \generalLayout }
+HEADER = {}
+MUSIC = {}
+TEXT = \markuplist {""}
+
+verseChords = {}
+firstVoice = {}
+global = {}

auto_rest_merging.ly

@@ -1,86 +0,0 @@
-%% 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 {
-  \generalLayout
-  \context {
-    \Staff
-    \override RestCollision.positioning-done = #merge-rests-on-positioning
-  }
-}

basic_format_and_style_settings.ly

@@ -1,8 +1,8 @@
 \language "deutsch"
 
-\include "default_author_style.ly"
-\include "styles.ly"
-\include #(ly:format "styles/~a.ly" songStyle)
+\include "default_style.ly"
+\include "default_songinfo_style.ly"
+\include "footer_with_songinfo.ly"
 
 \include #(if (defined? 'customStyleOverridesFile) customStyleOverridesFile "void.ly")
 
@@ -14,7 +14,6 @@
   property-defaults.fonts.sans = \songLyricFont
   %annotate-spacing = ##t
   % spacing stuff
-  lyric-size = #lyricSize
   two-sided = ##t
   inner-margin = 1.5\cm
   outer-margin = \songMargin
@@ -40,6 +39,7 @@ generalLayout = \layout {
   \context {
     \Staff
     \accidentalStyle modern
+    \consists Merge_rests_engraver
   }
   \context {
     \Score
@@ -61,6 +61,11 @@ generalLayout = \layout {
     \Voice
     % ich will lines breaken wie ich will!
     \remove "Forbid_line_break_engraver"
+    \override NoteHead.layer = 2
+    \override Dots.layer = 2
+    \override Stem.layer = 2
+    \override Flag.layer = 2
+    \override Beam.layer = 2
   }
 }
 
@@ -72,27 +77,101 @@ textp = \lyricmode { \markup { \raise #1 \musicglyph #"rests.3" } }
 % zweite Stimme alles grau
 secondVoiceStyle = {
   \override NoteHead.color = #grey
+  \override Dots.color = #grey
   \override Stem.color = #grey
   \override Flag.color = #grey
   \override Beam.color = #grey
+  \override NoteHead.layer = 1
+  \override Dots.layer = 1
+  \override Stem.layer = 1
+  \override Flag.layer = 1
+  \override Beam.layer = 1
 }
 
 firstVoiceStyle = {
   \override NoteHead.color = #black
+  \override Dots.color = #black
   \override Stem.color = #black
   \override Flag.color = #black
   \override Beam.color = #black
 }
 
-% einzelne Noten innerhalb von \secondVoiceStyle mit schwarzem statt grauem Kopf
+% Deprecated: 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
-  #})
+    (begin (ly:warning "\\schwarzkopf brauchts nicht mehr, das kann ersatzlos weg!") noten))
 
-% hübsche Wiederholungszeichen für den Liedtext
-repStart = "𝄆"
-repStop = "𝄇"
+romanStanza =
+  #(define-music-function (parser location) ()
+  #{ \override StanzaNumber.style = #'roman #})
+
+override-stanza =
+#(define-music-function (parser location stanzanumber) (number?)
+#{
+  \once \override StanzaNumber.forced-spacing = #stanzanumber % misuse property "forced-spacing" to override the stanzanumber
+#}
+)
+
+stanza =
+#(define-music-function (parser location stanzanumber) (number?)
+#{
+  \once \override StanzaNumber.layer = 23 % set this to signal that there is a real stanza and no repeat signs
+  \applyContext
+  #(lambda (context)
+    (let* ((stanzanumber (ly:assoc-get 'forced-spacing (ly:context-grob-definition context 'StanzaNumber) stanzanumber))
+           (stanzastyle (ly:assoc-get 'style (ly:context-grob-definition context 'StanzaNumber)))
+           (formattedStanzaNumber (format #f (if (eq? stanzastyle 'roman) romanStanzaFormat stanzaFormat) stanzanumber)))
+        (ly:context-set-property! context 'stanza formattedStanzaNumber)))
+#}
+)
+
+ref = {
+  \once \override StanzaNumber.layer = 23 % set this to signal that there is a real stanza and no repeat signs
+  \set stanza = \refString
+}
+
+% prints a repStart Sign as stanza if the tag 'repeats is kept.
+% if there was a stanza already set by the stanza function with StanzaNumber.layer = 23 we set that also as stanza.
+repStartWithTag = \lyricmode {
+  \tag #'repeats {
+    \applyContext
+    #(lambda (context)
+      (let ((lastStanza (ly:context-property context 'stanza))
+            (printLastStanza (= (ly:assoc-get 'layer (ly:context-grob-definition context 'StanzaNumber) 0) 23))
+            (stanzaFontSeries (ly:assoc-get 'font-series (ly:context-grob-definition context 'StanzaNumber) 'normal)))
+      (ly:context-set-property! context 'stanza
+        (make-concat-markup
+          (if printLastStanza
+            (list (make-override-markup `(font-series . ,stanzaFontSeries) lastStanza) (make-hspace-markup 1) repStart)
+            (list repStart)
+            )))))
+    \once \override StanzaNumber.font-series = #'normal
+  }
+}
+
+repStopWithTag = \lyricmode {
+  \tag #'repeats {
+    \once \override StanzaNumber.font-series = #'normal
+    \once \override StanzaNumber.direction = 1
+    \set stanza = \markup { \repStop }
+  }
+}
+
+rightHyphen = \lyricmode {
+  \once \override StanzaNumber.font-series = #'normal
+  \once \override StanzaNumber.direction = 1
+  \set stanza = "-"
+}
+
+leftHyphen = \lyricmode {
+  \once \override StanzaNumber.font-series = #'normal
+  \set stanza = "-"
+}
+
+multiVerseSkips =
+#(define-music-function (parser location skips) (number?)
+  #{ \tag #'multiVerse { \repeat unfold #skips { \skip4 } } #})
+
+alt =
+#(define-music-function (parser location a b) (ly:music? ly:music?)
+  #{ \tag #'firstVerse { #a } \tag #'multiVerse { #b } #})

book_include.ly

@@ -1,5 +1,3 @@
-\version "2.18"
-
 #(define song-list '())
 
 #(define (files-in-directory dirname)
@@ -120,7 +118,7 @@ includeSong =
      #{
      \bookOutputName #filename
      #}
-    (ly:parser-parse-string (if (< (list-ref (ly:version) 1) 19) (ly:parser-clone parser) (ly:parser-clone))
+    (ly:parser-parse-string (ly:parser-clone)
       (ly:format "\\include \"~a/~a/~a.ly\"" songPath filename filename))
     (let ((label (gensym "index")))
       (set! additional-page-switch-label-list
@@ -155,7 +153,7 @@ imagepage =
 songs =
 #(define-void-function (parser location) ()
  (for-each (lambda (songitems)
-   (ly:book-add-bookpart! (if (< (list-ref (ly:version) 1) 19) (ly:parser-lookup parser '$current-book) (ly:parser-lookup '$current-book))
+   (ly:book-add-bookpart! (ly:parser-lookup '$current-book)
     (let ((filename (car songitems))
           (songvars (cdr songitems)))
       (if (eq? filename 'emptyPage)

chord_settings.ly

@@ -8,6 +8,16 @@ klamm = #(define-music-function (parser location chords) (ly:music?)
 	\set chordNameFunction = #ignatzek-chord-names
 #})
 
+repeats-around-chords =
+#(define-music-function (parser location chords) (ly:music?)
+#{
+  \once \set noChordSymbol = \markup { \normal-text \repStart }
+  r4
+	$chords
+  \once \set noChordSymbol = \markup { \normal-text \repStop }
+  r4
+#})
+
 bchord =
 #(define-music-function (parser location chords) (ly:music?)
 #{
@@ -22,6 +32,38 @@ shiftChord = #(define-music-function (parser location xshift chord) (number? ly:
 	$chord
 #})
 
+shiftChords = #(define-music-function (parser location xshift chords) (number? ly:music?)
+#{
+	\override ChordName.extra-offset = #`(,xshift . 0)
+	$chords
+#})
+
+altChord = #(define-music-function (parser location mainchord altchord) (ly:music? ly:music?)
+(define (chord-namer in-pitches bass inversion context)
+#{
+  \markup {
+    \translate #'(-0.5 . 0)
+    \score {
+      \chords { #mainchord \klamm #altchord }
+      \layout {
+        \LAYOUT
+        \context {
+          \ChordNames
+          \override ChordName.extra-spacing-width = #'(0 . 0.3)
+        }
+        \context {
+          \Score
+          \override SpacingSpanner.spacing-increment = 0
+        }
+      }
+    }
+  }
+#})
+#{
+  \once \set chordNameFunction = #chord-namer
+	#mainchord
+#})
+
 % 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))))
@@ -71,7 +113,7 @@ generalLayout = \layout {
     \semiGermanChords
     \override ChordName.font-size = \songScoreChordFontSize
     \override ChordName.font-series = \songChordFontSeries
-    \override ChordName.font-family = #'sans
+    \override ChordName.font-family = #'serif
     chordNameLowercaseMinor = ##t
     chordChanges = ##t
     % eigenen chordRootNamer damit F# = Fis und Gb = Ges (also alteration ausgeschrieben)
@@ -79,16 +121,6 @@ generalLayout = \layout {
     chordNoteNamer = #bassnote-name->german-markup-nosym
     majorSevenSymbol = "maj7"
     chordNameExceptions = \chordNameExceptions
-    % der baseline-skip der Akkorde beeinflusst, wie hoch die Hochstellung ist
-    \override ChordName.baseline-skip = #1.0
-  }
-}
-
-verseChordLayout = \layout {
-  \generalLayout
-  \context {
-    \ChordNames
-    \override ChordName.font-size = \songTextChordFontSize
   }
 }
 
@@ -97,14 +129,42 @@ verseChordLayout = \layout {
    (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
+            \score { \new ChordNames {
+              #(ly:parser-include-string (string-append "\\chordmode { s4 " chord " }"))
+            } \layout { \generalLayout } }
+            \override #'(fret-diagram-details . ((barre-type . straight))) {
+              \fret-diagram-terse #fret
             }
           }
         }
      #}))
+
+% If you add this engraver to ChordNames Context chords get only printed on chordchanges and if its the first chord after line break.
+Ensure_first_chord_after_line_break_printed_engraver =
+  #(lambda (ctx)
+     (define last-system-column-rank 0)
+     (make-engraver
+      (acknowledgers
+       ((chord-name-interface this-engraver grob source-engraver)
+          (ly:grob-set-property! grob 'after-line-breaking
+            (lambda (grob)
+              (let ((current-system-column-rank (car (ly:grob-spanned-column-rank-interval (ly:grob-system grob)))))
+                (if (and
+                       (ly:context-property ctx 'chordChanges #f)
+                       (ly:grob-property grob 'begin-of-line-visible #f)
+                       (not (= last-system-column-rank current-system-column-rank)))
+                  ; the current chord handling implementation in lilypond uses 'begin-of-line-visible to mark repeated chords
+                  (ly:grob-set-property! grob 'begin-of-line-visible #f))
+                (set! last-system-column-rank current-system-column-rank)
+                (ly:chord-name::after-line-breaking grob)
+                )))))))
+
+% If you add this engraver to ChordNames Context chords get only printed on chordchanges and not at newline.
+Ignoring_newline_chord_changes_engraver =
+  #(lambda (ctx)
+     (make-engraver
+      (acknowledgers
+       ((chord-name-interface this-engraver grob source-engraver)
+         (when (and (ly:context-property ctx 'chordChanges #f) (ly:grob-property grob 'begin-of-line-visible #f))
+                  (ly:grob-suicide! grob)
+                )))))

default_author_style.ly

@@ -1,26 +0,0 @@
-\paper {
-  authorMarkup =
-    #(make-on-the-fly-markup
-      (lambda (layout props m)
-        (let ((name (chain-assoc-get 'author:name props #f))
-             (trail_name (chain-assoc-get 'author:trail_name props #f))
-             (birth_year (chain-assoc-get 'author:birth_year props #f))
-             (death_year (chain-assoc-get 'author:death_year props #f))
-             (organization (chain-assoc-get 'author:organization props #f)))
-          (interpret-markup layout props
-            (string-append
-              name
-              (if trail_name (ly:format " (~a)" trail_name) "")
-              (if (and birth_year death_year)
-                (ly:format ", (~a‒~a)" birth_year death_year)
-                (if birth_year
-                  (ly:format ", (*~a)" birth_year)
-                  (if death_year (ly:format ", (†~a)" death_year) "")))
-              (if organization (ly:format ", ~a" organization) "")
-          ))))
-      (make-null-markup)
-    )
-  poetMarkup = \markup { "Worte:" \fromproperty #'author }
-  composerMarkup = \markup { "Weise:" \fromproperty #'author }
-  poetAndComposerEqualMarkup = \markup { "Worte und Weise:" \fromproperty #'author }
-}

default_output.ly

@@ -0,0 +1,7 @@
+#(define noDefaultOutput (if (defined? 'noDefaultOutput) noDefaultOutput #f))
+HEADER = \bookpart {
+  \header {
+    \basicSongInfo
+  }
+}
+\include #(if noDefaultOutput "void.ly" "standalone_output.ly")

default_songinfo_style.ly

@@ -0,0 +1,62 @@
+\paper {
+  poetPrefix = "Worte:"
+  composerPrefix = "Weise:"
+  compositionPrefix = "Satz:"
+  poetAndComposerEqualPrefix = "Worte und Weise:"
+  voicePrefix = "Stimme:"
+  versePrefix = "Strophe:"
+  translationPrefix = "Übersetzung:"
+  interludePrefix = "Zwischenspiel:"
+  bridgePrefix = "Bridge:"
+
+  authorFormat =
+    #(lambda (noDetails name trail_name birth_year death_year organization)
+        (let ((string-present (lambda (str) (and str (not (and (string? str) (string-null? str))))))
+              (render_informations (lambda (infolist) (string-append (car infolist) (if (or noDetails (null? (cdr infolist))) "" (string-append " (" (string-join (cdr infolist) ", ") ")"))))))
+            (if (or (string-present trail_name) (string-present name))
+              (render_informations (filter string-present (list
+                trail_name
+                name
+                (if (and (string-present birth_year) (string-present death_year))
+                  (ly:format "~a‒~a" birth_year death_year)
+                  (if (string-present birth_year)
+                    (ly:format "*~a" birth_year)
+                    (if (string-present death_year) (ly:format "†~a" death_year) "")))
+                organization
+              )))
+              ""
+          )))
+
+  songinfoMarkup =
+    #(make-on-the-fly-markup
+      (lambda (layout props m)
+        (let* ((between-poet-and-composer-markup (chain-assoc-get 'header:between-poet-and-composer-markup props (make-hspace-markup 3)))
+              (poet-maybe-with-composer (chain-assoc-get 'songinfo:poet-maybe-with-composer props #f))
+              (composer (chain-assoc-get 'songinfo:composer props #f))
+              (copyright (chain-assoc-get 'songinfo:copyright props #f))
+              (infotext (chain-assoc-get 'songinfo:infotext props #f))
+              (translation (chain-assoc-get 'songinfo:translation props #f))
+              (pronunciation (chain-assoc-get 'songinfo:pronunciation props #f))
+              (year_text (chain-assoc-get 'songinfo:year_text props #f))
+              (year_melody (chain-assoc-get 'songinfo:year_melody props #f))
+              (poet-with-year (if (and poet-maybe-with-composer year_text) (string-append poet-maybe-with-composer ", " year_text) poet-maybe-with-composer))
+              (composer-with-year (if (and composer year_melody) (string-append composer ", " year_melody) composer))
+              (poet-and-composer-oneliner (if (and poet-with-year composer-with-year) (markup poet-with-year between-poet-and-composer-markup composer-with-year) #f))
+              (current-line-width (chain-assoc-get 'line-width props (ly:output-def-lookup layout 'line-width))))
+          (stack-lines DOWN 0.0 (chain-assoc-get 'baseline-skip props)
+            (interpret-markup-list layout props
+              (append
+                (if (and poet-and-composer-oneliner (< (interval-length (ly:stencil-extent (interpret-markup layout props poet-and-composer-oneliner) X)) current-line-width))
+                  (list poet-and-composer-oneliner)
+                  (make-wordwrap-string-internal-markup-list #t (string-append
+                    (if poet-with-year (string-append "\n\n" poet-with-year) "")
+                    (if composer-with-year (string-append "\n\n" composer-with-year) "")
+                  )))
+                (make-wordwrap-string-internal-markup-list #t (string-append
+                  (if copyright (string-append "\n\n© " copyright) "")
+                  (if infotext (string-append "\n\n" infotext) "")
+                  (if translation (string-append "\n\nÜbersetzung: " translation) "")
+                  (if pronunciation (string-append "\n\nAussprache: " pronunciation) ""))))))))
+      (make-null-markup)
+    )
+}

default_style.ly

@@ -0,0 +1,23 @@
+songFormatAndSize = "a5"
+songMargin = 5
+songInfoFontSize = 0
+songInfoLineWidthFraction = 0.9
+songTitleSize = 6
+songTitleFont = "LilyPond Sans"
+songChordFont = "LilyPond Sans"
+songLyricFont = "LilyPond Sans"
+songChordFontSeries = #'bold
+songTextChordAlignment = #'left
+songScoreChordFontSize = 2
+songTextChordFontSize = \songScoreChordFontSize
+songTextChordDistance = 2.8
+songTextLineHeigth = 5.8
+songTocColumns = 3
+globalSize = 15
+lyricSize = 1.6
+stanzaFormat = "~a."
+romanStanzaFormat = "~@r."
+refString = "Ref.:"
+% hübsche Wiederholungszeichen für den Liedtext
+repStart = "𝄆"
+repStop = "𝄇"

footer_with_songinfo.ly

@@ -1,3 +1,4 @@
+#(use-modules (ice-9 receive))
 #(define-markup-command (print-songinfo layout props) ()
   (define (songinfo-from songId key)
     (let ((song (if (defined? 'SONG_DATA) (assoc-ref SONG_DATA songId) #f)))
@@ -5,60 +6,187 @@
         (assoc-ref song key)
         (ly:warning (ly:format "song with id ~a not found" songId)))))
 
-  (define (format-author authorId)
+  (define (format-author authorId noDetails)
     (let ((author (if (defined? 'AUTHOR_DATA) (assoc-ref AUTHOR_DATA authorId) #f)))
       (if author
-        (markup
-          #:override (cons 'author:name (assoc-ref author "name"))
-          #:override (cons 'author:trail_name (assoc-ref author "trail_name"))
-          #:override (cons 'author:birth_year (assoc-ref author "birth_year"))
-          #:override (cons 'author:death_year (assoc-ref author "death_year"))
-          #:override (cons 'author:organization (assoc-ref author "organization"))
-          (ly:output-def-lookup layout 'authorMarkup))
-        (ly:warning (ly:format "author with id ~a not found" authorId)))))
+        ((ly:output-def-lookup layout 'authorFormat)
+          noDetails
+          (assoc-ref author "name")
+          (assoc-ref author "trail_name")
+          (assoc-ref author "birth_year")
+          (assoc-ref author "death_year")
+          (assoc-ref author "organization")
+        )
+        "unbekannt")))
 
   (define (format-poet poetId)
-    (markup #:override (cons 'author (format-author poetId)) (ly:output-def-lookup layout 'poetMarkup)))
+    (string-append (ly:output-def-lookup layout 'poetPrefix) " " (format-author poetId #f)))
 
   (define (format-composer composerId)
-    (markup #:override (cons 'author (format-author composerId)) (ly:output-def-lookup layout 'composerMarkup)))
+    (string-append (ly:output-def-lookup layout 'composerPrefix) " " (format-author composerId #f)))
 
   (define (format-poet-and-composer authorId)
-    (markup #:override (cons 'author (format-author authorId)) (ly:output-def-lookup layout 'poetAndComposerEqualMarkup)))
+    (string-append (ly:output-def-lookup layout 'poetAndComposerEqualPrefix) " " (format-author authorId #f)))
+
+  (define (find-author-ids-by contributionType authors)
+    (filter-map (lambda (authordata) (if (member contributionType (cdr authordata)) (car authordata) #f)) authors)
+  )
+
+  (define (find-author-id-with-part-numbers contributionType authors)
+    (filter-map (lambda (authordata)
+      (let ((contributionNumbers (filter-map (lambda (contribution) (if (and (list? contribution) (equal? contributionType (car contribution))) (cadr contribution) #f)) (cdr authordata)))
+            (authorId (car authordata)))
+        (if (null? contributionNumbers) #f (cons authorId contributionNumbers))
+      )) authors)
+  )
+
+  (define (numbered-contribution-prefix contributionNumbers prefixLookup)
+    (string-append
+      (string-join (map (lambda (contributionNumber) (ly:format "~a." contributionNumber)) contributionNumbers) ", ")
+      " "
+      (ly:output-def-lookup layout prefixLookup)
+    )
+  )
+
+  (define referencedAuthors '())
+
+  (define (format-authors authorIds)
+    (map (lambda (authorId)
+      (format-author
+        authorId
+        (if (member authorId referencedAuthors)
+          #t
+          (begin
+            (set! referencedAuthors (cons authorId referencedAuthors))
+            #f)))
+    ) authorIds)
+  )
+
+  (define (render-contribution-group contributionPrefix authorIds)
+    (if (null? authorIds)
+      ""
+      (string-append contributionPrefix " " (string-join (format-authors authorIds) ", ")))
+  )
+
+  (define (render-partial-contribution-group prefixLookup authorData)
+    (if (null? authorData)
+      ""
+      (let ((firstAuthorContributions (cdar authorData)))
+        (receive (authorDataSame authorDataOther)
+            (partition (lambda (authorEntry) (equal? (cdr authorEntry) firstAuthorContributions)) authorData)
+          (string-append
+            (render-contribution-group (numbered-contribution-prefix firstAuthorContributions prefixLookup) (map car authorDataSame))
+            " "
+            (render-partial-contribution-group prefixLookup authorDataOther)
+          ))))
+  )
+
+  (define (join-present items joiner)
+    (string-join (filter (lambda (item) (and (string? item) (not (string-null? (string-trim-both item))))) items) joiner)
+  )
+
+  (define (poet-and-composer-from-authors authors)
+    (if authors
+      (let (
+            (poetIds (find-author-ids-by 'text authors))
+            (translatorIds (find-author-ids-by 'translation authors))
+            (versePoetData (find-author-id-with-part-numbers 'verse authors))
+            (composerIds (find-author-ids-by 'melody authors))
+            (verseComposerData (find-author-id-with-part-numbers 'meloverse authors))
+            (voiceComposerData (find-author-id-with-part-numbers 'voice authors))
+            (compositionIds (find-author-ids-by 'composition authors))
+            (bridgeIds (find-author-ids-by 'bridge authors))
+            (interludeIds (find-author-ids-by 'interlude authors))
+            (year_text (chain-assoc-get 'header:year_text props #f))
+            (year_translation (chain-assoc-get 'header:year_translation props #f))
+            (year_melody (chain-assoc-get 'header:year_melody props #f))
+            (year_composition (chain-assoc-get 'header:year_composition props #f))
+            )
+        (if (and (equal? poetIds composerIds) (null? translatorIds) (null? versePoetData) (null? verseComposerData) (null? voiceComposerData) (null? compositionIds) (null? bridgeIds) (null? interludeIds))
+          (list
+            (join-present (list
+              (render-contribution-group (ly:output-def-lookup layout 'poetAndComposerEqualPrefix) poetIds)
+              (if (equal? year_text year_melody) year_text (join-present (list year_text year_melody) "/"))
+            ) ", ")
+            #f)
+          (list
+            (if (and (null? poetIds) (null? versePoetData) (null? translatorIds)) #f
+              (string-append
+                (ly:output-def-lookup layout 'poetPrefix)
+                " "
+                (join-present (list
+                  (join-present (list
+                    (render-contribution-group "" poetIds)
+                    year_text
+                  ) ", ")
+                  (render-partial-contribution-group 'versePrefix versePoetData)
+                  (join-present (list
+                    (render-contribution-group (ly:output-def-lookup layout 'translationPrefix) translatorIds)
+                    year_translation
+                  ) ", ")
+                ) "; ")
+              ))
+            (if (and (null? composerIds) (null? compositionIds) (null? verseComposerData) (null? voiceComposerData) (null? bridgeIds) (null? interludeIds)) #f
+              (string-append
+                (ly:output-def-lookup layout 'composerPrefix)
+                " "
+                (join-present (list
+                  (join-present (list
+                    (render-contribution-group "" composerIds)
+                    year_melody
+                  ) ", ")
+                  (render-partial-contribution-group 'versePrefix verseComposerData)
+                  (render-partial-contribution-group 'voicePrefix voiceComposerData)
+                  (join-present (list
+                    (render-contribution-group (ly:output-def-lookup layout 'compositionPrefix) compositionIds)
+                    year_composition
+                  ) ", ")
+                  (render-contribution-group (ly:output-def-lookup layout 'bridgePrefix) bridgeIds)
+                  (render-contribution-group (ly:output-def-lookup layout 'interludePrefix) interludeIds)
+                ) "; ")
+              )))))
+      (list #f #f)
+    )
+  )
 
   (interpret-markup layout props
     (if (chain-assoc-get 'page:is-bookpart-last-page props #f)
-    (let* ((songId (chain-assoc-get 'header:songId props #f))
+    (let* ((authors (chain-assoc-get 'header:authors props #f))
+           (poet-and-composers (poet-and-composer-from-authors authors))
+           (songId (chain-assoc-get 'header:songId props #f))
            (poetId (chain-assoc-get 'header:poetId props (if songId (songinfo-from songId "poet") #f)))
            (composerId (chain-assoc-get 'header:composerId props (if songId (songinfo-from songId "composer") #f)))
            (poet-and-composer-same (equal? poetId composerId)))
-      (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 (if poetId (if poet-and-composer-same (format-poet-and-composer poetId) (format-poet poetId)) #f)))
-            (composer (chain-assoc-get 'header:composer props (if (and composerId (not poet-and-composer-same)) (format-composer composerId) #f)))
-            (poet-and-composer-stacked (chain-assoc-get 'header:poet-and-composer-stacked props songInfoPoetAndComposerStacked))
-            (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)))
-            (markup #:override '(baseline-skip . 3.0) (
-                make-fontsize-markup songInfoFontSize
-                (make-sans-markup
-                ;%\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 "")
-                  )))
-                )))
-              )
-            )
-          ))
+      (let ((infotext (chain-assoc-get 'header:infotext props (chain-assoc-get 'header:songinfo props #f)))
+            (poet-maybe-with-composer (chain-assoc-get 'header:poet props (if poetId (if poet-and-composer-same (format-poet-and-composer poetId) (format-poet poetId)) (car poet-and-composers))))
+            (composer (chain-assoc-get 'header:composer props (if (and composerId (not poet-and-composer-same)) (format-composer composerId) (cadr poet-and-composers))))
+            (copyright (chain-assoc-get 'header:copyright props #f))
+            (translation (chain-assoc-get 'header:translation props #f))
+            (pronunciation (chain-assoc-get 'header:pronunciation props #f))
+            (year_text (if (string? (car poet-and-composers)) #f (chain-assoc-get 'header:year_text props #f)))
+            (year_melody (if (string? (car poet-and-composers)) #f (chain-assoc-get 'header:year_melody props #f))))
+            (markup
+              #:override (cons 'songinfo:poet-maybe-with-composer
+                (if (and poet-maybe-with-composer (not (and (string? poet-maybe-with-composer) (string-null? poet-maybe-with-composer)))) poet-maybe-with-composer #f))
+              #:override (cons 'songinfo:composer
+                (if (and composer (not (and (string? composer) (string-null? composer)))) composer #f))
+              #:override (cons 'songinfo:copyright
+                (if (and copyright (not (and (string? copyright) (string-null? copyright)))) copyright #f))
+              #:override (cons 'songinfo:infotext
+                (if (and infotext (not (and (string? infotext) (string-null? infotext)))) infotext #f))
+              #:override (cons 'songinfo:translation
+                (if (and translation (not (and (string? translation) (string-null? translation)))) translation #f))
+              #:override (cons 'songinfo:pronunciation
+                (if (and pronunciation (not (and (string? pronunciation) (string-null? pronunciation)))) pronunciation #f))
+              #:override (cons 'songinfo:year_text
+                (if (and year_text (not (and (string? year_text) (string-null? year_text)))) year_text #f))
+              #:override (cons 'songinfo:year_melody
+                (if (and year_melody (not (and (string? year_melody) (string-null? year_melody)))) year_melody #f))
+              #:override '(baseline-skip . 3.0)
+              #:fontsize songInfoFontSize
+              #:sans
+              (ly:output-def-lookup layout 'songinfoMarkup)
+            )))
       (make-null-markup)))
 )
 
@@ -72,6 +200,12 @@
         )
    ))))
 
+#(define-markup-command (fractional-line-width layout props arg)(markup?)
+  (interpret-markup layout props
+    (make-override-markup
+      `(line-width . ,(* (chain-assoc-get 'header:songinfo-size-factor props songInfoLineWidthFraction) (ly:output-def-lookup layout 'line-width)))
+      arg)))
+
 \paper {
   print-first-page-number = ##t
   first-page-number = #0
@@ -79,14 +213,14 @@
   oddFooterMarkup = \markup {
     \fill-line {
       \line { \null }
-      \line { \general-align #Y #DOWN \print-songinfo }
+      \line { \general-align #Y #DOWN \fractional-line-width \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 { \general-align #Y #DOWN \fractional-line-width \print-songinfo }
       \line { \null }
     }
   }

general_include.ly

@@ -1,28 +1,6 @@
-\version "2.18"
-
+\version "2.25.8"
 #(ly:set-option 'relative-includes #t)
 
-\include #(if (< (list-ref (ly:version) 1) 24) "legacy-lilypond-compatibility.ly" "void.ly")
+#(define noDefaultOutput #t)
 
-#(define noStandaloneOutput (if (defined? 'noStandaloneOutput) noStandaloneOutput #f))
-
-#(if (defined? 'LAYOUT) #f (load "json_parser.scm"))
-#(use-modules (json parser))
-\include "basic_format_and_style_settings.ly"
-\include #(if (< (list-ref (ly:version) 1) 25) "legacy-lilypond-compatibility-pre-2.25.ly" "void.ly")
-\include "eps_file_from_song_dir.ly"
-\include "title_with_category_images.ly"
-\include "footer_with_songinfo.ly"
-\include "auto_rest_merging.ly"
-\include "chord_settings.ly"
-\include "transposition.ly"
-\include "verses_with_chords.ly"
-\include "arrows_in_scores.ly"
-\include "swing_style.ly"
-\include "inline_score.ly"
-
-% reset important variables
-LAYOUT = \layout { \generalLayout }
-HEADER = {}
-MUSIC = {}
-TEXT = \markuplist {""}
+\include "all_base_includes.ly"

inline_score.ly

@@ -4,5 +4,5 @@ inline-score =
 #(define-music-function (music) (ly:music?)
    (set! INLINESCOREMUSIC #{ \INLINESCOREMUSIC #music #})
     #{
-      \transposable #music
+      \transposable #TRANSPOSITION #music
     #})

legacy-lilypond-compatibility-pre-2.25.ly

@@ -1,22 +0,0 @@
-% guile regular expressions aktivieren:
-#(use-modules (ice-9 regex))
-
-#(define ly:make-regex make-regexp)
-#(define ly:regex-exec regexp-exec)
-#(define ly:regex-match-substring match:substring)
-#(define (ly:regex-replace pattern text . replacements)
-  (apply regexp-substitute/global #f pattern text 'pre (append replacements (list 'post))))
-
-
-% old font handling
-
-#(define (default-pango size)
-  (make-pango-font-tree
-    songChordFont
-    songLyricFont
-    "Luxi Mono"
-    (/ size 20)))
-
-\paper {
-  #(define fonts (default-pango globalSize))
-}

legacy-lilypond-compatibility.ly

@@ -1,27 +0,0 @@
-% this is to be compatible to older lilypond versions
-\version "2.18.0"
-
-#(define (on-first-page layout props)
-  "Whether the markup is printed on the first page of the book."
-  (= (chain-assoc-get 'page:page-number props -1)
-     (book-first-page layout props)))
-
-#(define-markup-command (if layout props condition? argument)
-  (procedure? markup?)
-  #:category conditionals
-  (if (condition? layout props)
-      (interpret-markup layout props argument)
-      empty-stencil))
-
-#(define (on-first-page-of-part layout props)
-  "Whether the markup is printed on the first page of the book part."
-  (= (chain-assoc-get 'page:page-number props -1)
-     (ly:output-def-lookup layout 'first-page-number)))
-
-#(define (should-print-page-number layout props)
-  "Whether the page number should be printed on this page.  This depends
-on the settings @code{print-@/page-@/numbers} and
-@code{print-@/first-@/page-@/number} of the @code{\\paper} block."
-  (and (eq? #t (ly:output-def-lookup layout 'print-page-number))
-       (or (not (on-first-page layout props))
-           (eq? #t (ly:output-def-lookup layout 'print-first-page-number)))))

resolve_inherits.ly

@@ -0,0 +1,22 @@
+#(define (resolve-inherit-entry-in-list alist entry)
+  (let* ((key (car entry))
+        (attributes (cdr entry))
+        (inherits (assoc-ref attributes "inherits")))
+    (if inherits
+      (let* ((alist-without-entry (alist-delete key alist))
+            (inherit-entry (assoc inherits alist-without-entry))
+            (inherits-attributes (if inherit-entry (alist-copy (cdr (resolve-inherit-entry-in-list alist-without-entry inherit-entry)))))
+            (override-attributes (alist-delete "inherits" attributes)))
+        (if inherit-entry
+          (begin
+            (for-each (lambda (attribute) (assoc-set! inherits-attributes (car attribute) (cdr attribute))) override-attributes)
+            (cons key inherits-attributes)
+          )
+          (ly:error "~a can not inherit from ~a" key inherits))
+      )
+      entry
+    )))
+
+#(define (resolve-inherits alist)
+  (map (lambda (entry) (resolve-inherit-entry-in-list alist entry)) alist)
+)

snippet_include.ly

@@ -0,0 +1,8 @@
+#(ly:set-option 'relative-includes #t)
+
+#(define noDefaultOutput (if (defined? 'noDefaultOutput) noDefaultOutput #f))
+
+\include #(if noDefaultOutput "void.ly" "all_base_includes.ly")
+
+#(define AUTHOR_DATA (if (defined? 'AUTHOR_DATA) AUTHOR_DATA (call-with-input-file "../data/authors.json" json->scm)))
+#(define SONG_DATA (if (defined? 'SONG_DATA) SONG_DATA (call-with-input-file "../data/songs.json" json->scm)))

standalone_output.ly

@@ -1,7 +1,22 @@
 % set the speed of the midi music
 #(define midiQuarterNoteSpeed (if (defined? 'midiQuarterNoteSpeed) midiQuarterNoteSpeed 90))
 
-MUSIC = { \transposable \MUSIC }
+MUSIC = { \transposable #TRANSPOSITION \MUSIC }
+
+verselayout = \layout {
+  \LAYOUT
+  \context {
+    \ChordNames
+    \override ChordName.font-size = \songTextChordFontSize
+  }
+}
+TEXT = \markuplist {
+  \override #`(transposition . ,TRANSPOSITION)
+  \override #`(verselayout . ,verselayout)
+  \override #`(verse-chords . ,#{ \chords { \verseChords } #})
+  \override #`(verse-reference-voice . ,#{ \global \firstVoice  #})
+  \TEXT
+}
 
 % nur Output wenn noStandaloneOutput auf false steht
 output = #(if (not noStandaloneOutput)

styles.ly

@@ -5,7 +5,7 @@
 
 #(define songStyle
   (if (not (defined? 'songStyle))
-      (if (not (defined? 'defaultSongStyle)) 'börnel defaultSongStyle)
+      (if (not (defined? 'defaultSongStyle)) 'default defaultSongStyle)
       songStyle))
 
 #(if (not (boolean? bookStyle))

styles/bock.ly

@@ -1,15 +0,0 @@
-songFormatAndSize = "a6landscape"
-songMargin = 8
-songInfoFontSize = -1.5
-songTitleFont = "Britannic T. custom"
-songChordFont = "TimesNewRomanPS"
-songLyricFont = "Arial"
-songChordFontSeries = #'normal
-songTextChordAlignment = #'left
-songScoreChordFontSize = 3
-songTextChordFontSize = 2
-songTextLineHeigth = 5.5
-songInfoPoetAndComposerStacked = ##f
-songTocColumns = 3
-globalSize = 15
-lyricSize = 1.6

styles/börnel.ly

@@ -1,15 +0,0 @@
-songFormatAndSize = "b6landscape"
-songMargin = 5
-songInfoFontSize = -3.5
-songTitleFont = "Oregano"
-songChordFont = "TeX Gyre Heros"
-songLyricFont = "Liberation Sans"
-songChordFontSeries = #'bold
-songTextChordAlignment = #'center
-songScoreChordFontSize = 0
-songTextChordFontSize = \songScoreChordFontSize
-songTextLineHeigth = 5
-songInfoPoetAndComposerStacked = ##f
-songTocColumns = 3
-globalSize = 15
-lyricSize = 1.6

styles/büdel.ly

@@ -1,15 +0,0 @@
-songFormatAndSize = "a5"
-songMargin = 5
-songInfoFontSize = 0
-songTitleFont = "Fontin Bold"
-songChordFont = "Fontin"
-songLyricFont = "FontinSans"
-songChordFontSeries = #'bold
-songTextChordAlignment = #'left
-songScoreChordFontSize = 2
-songTextChordFontSize = 2
-songTextLineHeigth = 5.3
-songInfoPoetAndComposerStacked = ##t
-songTocColumns = 2
-globalSize = 14
-lyricSize = 1.6

title_with_category_images.ly

@@ -4,7 +4,7 @@
 \markup {
   \override #'(baseline-skip . 3.5)
   \center-column {
-    \override #`(font-name . ,songTitleFont) { \fontsize #6 \fromproperty #'header:title }
+    \override #`(font-name . ,songTitleFont) { \fontsize #songTitleSize \fromproperty #'header:title }
     \large \bold \fromproperty #'header:subtitle
     \smaller \bold \fromproperty #'header:subsubtitle
   }
@@ -35,10 +35,7 @@
            (string-tokenize (chain-assoc-get 'header:categories props ""))))
        (make-null-markup))))
 
-#(define pdf-encode
-   (if (< (list-ref (ly:version) 1) 24)
-       ly:encode-string-for-pdf
-   (@@ (lily framework-ps) pdf-encode)))
+#(define pdf-encode (@@ (lily framework-ps) pdf-encode))
 % PDF tags
 #(define-markup-command (title-to-pdf-toc layout props title) (string?)
      (ly:make-stencil

toc_include.ly

@@ -167,26 +167,11 @@
                (reverse (map (lambda (m)
                                (make-size-box-to-box-markup #f #t m target-size-markup))
                           (cons
-                           (make-fill-with-pattern-markup 1 RIGHT "." (car revlist) page)
+                           (make-with-link-symbol-ref-markup 'index:label (make-fill-with-pattern-markup 1 RIGHT "." (car revlist) page))
                            (cdr revlist)))))))))
 
 \paper {
-  indexTitleMarkup = \markup \column {
-    \fontsize #5 \sans \bold \fill-line { \null \fromproperty #'index:text \null }
-    \vspace #.5
-    \justify {
-      Da die allermeisten Lieder unter verschiedenen Namen bekannt sind,
-      wollen wir euch ein Inhaltsverzeichnis an die Hand geben, mit dem ihr hoffentlich auf verschiedene Arten fündig werdet.
-      Die Liedtitel, die auch die Überschriften sind, findet ihr normal gedruckt.
-      Alle weiteren Alternativtitel oder Liedanfänge sind zur Unterscheidung kursiv gedruckt.
-    }
-    \vspace #1
-  }
-  categoryTitleMarkup = \markup \column {
-    \fontsize #5 \sans \bold \fill-line { \null \fromproperty #'index:text \null }
-    \vspace #1
-  }
-  indexItemMarkup = \markup \with-link-symbol-ref #'index:label {
+  indexItemMarkup = \markup {
     \index-item-with-pattern
   }
   indexSectionMarkup = \markup \override #'(baseline-skip . 1.5) \left-column {
@@ -199,29 +184,7 @@
   }
 
 }
-%{
-#(define-markup-list-command (index layout props) ()
-  ( _i "Outputs an alphabetical sorted index, using the paper
-  variable @code{indexTitleMarkup} for its title, then the list of
-  lines built using the @code{indexItem} music function
-  Usage: @code{\\markuplines \\index}" )
-  (cons (interpret-markup layout (cons (list (cons 'index:text "Inhaltsverzeichnis")) props)
-        (ly:output-def-lookup layout 'indexTitleMarkup))
-    (space-lines (chain-assoc-get 'baseline-skip props)
-        (map (lambda (index-item)
-         (let ((label (car index-item))
-         (index-markup (cadr index-item))
-         (text (caddr index-item)))
-           (interpret-markup
-             layout
-             (cons (list (cons 'index:page
-              (markup #:page-ref label "XXX" "?"))
-             (cons 'index:text text)
-             (cons 'index:label label))
-             props)
-             (ly:output-def-lookup layout index-markup))))
-       (index-items)))))
-%}
+
 #(define (prepare-item-markup items layout)
    (map (lambda (index-item)
          (let ((label (car index-item))
@@ -233,33 +196,18 @@
              (ly:output-def-lookup layout index-markup))))
        (items)))
 
-
-#(define-markup-list-command (colindex layout props) ()
-  ( _i "Outputs an alphabetical sorted index, using the paper
-  variable @code{indexTitleMarkup} for its title, then the list of
-  lines built using the @code{indexItem} music function
-  Usage: @code{\\markuplines \\index}" )
-      (let ((title (interpret-markup layout (cons (list (cons 'index:text "Inhaltsverzeichnis")) props)
-        (ly:output-def-lookup layout 'indexTitleMarkup))))
-        (cons title
-  (interpret-markup-list layout props
-    (make-columnlayout-markup-list songTocColumns 2
-      (let ((h (- (ly:output-def-lookup layout 'paper-height) 12)))
-        (cons (- h (interval-length (ly:stencil-extent title Y))) h))
-      (prepare-item-markup index-items layout))))))
-
-#(define-markup-list-command (categoryindex layout props) ()
-  ( _i "Outputs categorized song titles" )
-    (if (null-list? (category-index-items))
-        (list)
-      (let ((title (interpret-markup layout (cons (list (cons 'index:text "Inhaltsverzeichnis nach Kategorien")) props)
-        (ly:output-def-lookup layout 'categoryTitleMarkup))))
-        (cons title
-  (interpret-markup-list layout props
-    (make-columnlayout-markup-list songTocColumns 2
-      (let ((h (- (ly:output-def-lookup layout 'paper-height) 12)))
-        (cons (- h (interval-length (ly:stencil-extent title Y))) h))
-      (prepare-item-markup category-index-items layout)))))))
+#(define-markup-list-command (index-in-columns-with-title layout props index-type title-markup) (symbol? markup?)
+  ( _i "Outputs index alphabetical sorted or in categories" )
+    (let ((items (case index-type
+            ((alphabetical) index-items)
+            ((categories) category-index-items)))
+          (title (interpret-markup layout props title-markup)))
+      (cons title
+      (interpret-markup-list layout props
+        (make-columnlayout-markup-list songTocColumns 2
+          (let ((h (- (ly:output-def-lookup layout 'paper-height) 12)))
+            (cons (- h (interval-length (ly:stencil-extent title Y))) h))
+          (prepare-item-markup items layout))))))
 
 indexItem =
 #(define-music-function (parser location sorttext text) (string? markup?)
@@ -271,18 +219,6 @@ indexSection =
    "Add a section line to the alphabetical index, using @code{indexSectionMarkup} paper variable markup. This can be used to divide the alphabetical index into different sections, for example one section for each first letter."
    (add-index-item! 'indexSectionMarkup text sorttext))
 
-%{
-addTitleToTOC = #(define-music-function (parser location title) (string?)
-  #{
-    \indexItem #title \markup { #title }
-  #})
-
-addAltTitleToTOC = #(define-music-function (parser location title) (string?)
-  #{
-    \indexItem #title \markup { \italic #title }
-  #})
-%}
-
 #(define (extract-var-from-module module sym)
   (let ((variableref (assoc-ref module sym)))
     (if variableref (variable-ref variableref) #f))

transposition.ly

@@ -1,13 +1,22 @@
-TRANSPOSITION = ##f
+TRANSPOSITION = #(cons #f #f)
 
 transposeGlobal =
 #(define-void-function (from to) (ly:pitch? ly:pitch?)
    (set! TRANSPOSITION (cons from to)))
 
 transposable =
-#(define-music-function (music) (ly:music?)
-  (if TRANSPOSITION
+#(define-music-function (fromto music) (pair? ly:music?)
+  (if (car fromto)
     #{
-      \transpose #(car TRANSPOSITION) #(cdr TRANSPOSITION) #music
+      \transpose #(car fromto) #(cdr fromto) #music
     #}
     music))
+
+% Akkorde in Strophen transponieren
+#(define-markup-list-command (transpose layout props from to markuplist)
+  (markup? markup? markup-list?)
+
+  (define (markup->pitch m)
+    (ly:assoc-get (string->symbol (markup->string m)) pitchnames))
+
+  (interpret-markup-list layout (prepend-alist-chain 'transposition (cons (markup->pitch from) (markup->pitch to)) props) markuplist))

verses_with_chords.ly

@@ -5,7 +5,7 @@
      #{ \markup { \column {
      $(let ((verse-markup-string (
         string-append "\\line { "
-          (ly:regex-replace (ly:make-regex "\n") text " } \\line { ")
+          (ly:regex-replace (ly:make-regex "\r?\n") text " } \\line { ")
           " \\size-box-to-box ##f ##t \"\" \"Agj\" }" )))
        (ly:parser-include-string verse-markup-string))
      }}#}
@@ -52,11 +52,6 @@
      ((center) (make-size-box-to-box-markup use-x use-y abox bbox))
      ((left) (make-size-box-to-box-left-aligned-markup use-x use-y abox bbox)))))
 
-% 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 songTextChordAlignment
@@ -66,17 +61,18 @@
 % Text über Text mittig darstellen
 #(define-markup-command (textup layout props text uptext) (markup? markup?)
    "Markup über Text mittig darstellen."
+   (let ((verselayout (chain-assoc-get 'verselayout props generalLayout)))
    (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 } }
+           \size-box-to-box ##f ##t #uptext \score { \chords { g4:m a } \layout { \verselayout } }
          }
          #text
        }
      #}
-   ))
+   )))
 
 #(define-markup-command (anchor-x-between layout props arga argb)
    (markup? markup?)
@@ -87,52 +83,92 @@
      ))
 
 #(define-markup-command (stanza-raw layout props arg)
-   (markup?)
+   (string-or-music?)
+   (let ((verselayout (chain-assoc-get 'verselayout props generalLayout)))
    (interpret-markup layout props
      (if (and (string? arg) (string-null? arg))
          " "
          #{\markup
-           \score { \new Lyrics { \lyricmode { \set stanza = #arg "" } } \layout { \generalLayout } }
+           \score { \new Lyrics { \lyricmode { #(if (ly:music? arg) arg #{ \set stanza = #arg #}) "" } } \layout { \verselayout } }
          #}
-     )))
+     ))))
 
 #(define-markup-command (stanza layout props arg)
-   (markup?)
+   (string-or-music?)
    (interpret-markup layout props
      (make-size-box-to-box-markup #f #t (make-stanza-raw-markup arg) (make-stanza-raw-markup "x"))))
 
+#(define (handle-custom-newlines custom-verse-breaks text)
+  (if (null? custom-verse-breaks)
+    text
+    (let make-custom-linebreaks
+      ((break-words custom-verse-breaks)
+       (newtext (ly:regex-replace (ly:make-regex "\r?\n") text " ")))
+      (if (null? break-words)
+          newtext
+          (make-custom-linebreaks
+            (cdr break-words)
+            (ly:regex-replace
+              (ly:make-regex
+                (string-append
+                  "("
+                  (string-concatenate
+                    (map
+                      (lambda (character)
+                        (let ((escaped_char (ly:regex-quote (string character))))
+                             (string-append "(?: *,[^,)]+\\)" escaped_char "|\\(?" escaped_char ")")))
+                      (string->list (car break-words))))
+                  "(?: *,[^,)]+\\))?)(.*)$"))
+              newtext
+              1 "\n" 2))))))
+
+#(use-modules (lily display-lily))
+
 % Kompletten Vers mit Akkorden
-#(define-markup-command (chordverse layout props stanza verse) (markup? string?)
-   #:properties ((intraverse-vspace 0))
+#(define-markup-command (chordverse layout props stanza verse) (string-or-music? string?)
+   #:properties (
+    (intraverse-vspace 0)
+    (custom-verse-breaks '())
+    (transposition (cons #f #f))
+    (verselayout generalLayout)
+    )
    "Vers mit Akkorden"
-   (let* ((fromto (chain-assoc-get 'transposition props #f))
-          (transp (if fromto
-                    (string-append "\\transpose " (car fromto) " " (cdr fromto))
+   (let ((transp (if (car transposition)
+                    (string-append "\\transpose " (symbol->string (note-name->lily-string (car transposition))) " " (symbol->string (note-name->lily-string (cdr transposition))))
                     "")))
    (interpret-markup layout props
      (markup #:override `(baseline-skip . ,(+ intraverse-vspace songTextLineHeigth)) #:anchor-x-between #:stanza stanza
        (make-wrap-newline-markup
                (ly:regex-replace (ly:make-regex "\\(( *)([^,()]*)( *),([^)]*)\\)")
-                 (ly:regex-replace (ly:make-regex "(([^ \n]*\\([^()]*,[^()]+\\)[^ \n(]*)+)") verse " \\concat { " 1 " } ")
-                "\\textup \\line { \"" 1 "\" " 2 " \"" 3 "\" } \\score { \\transposable " transp " \\chords { s4 " 4 " } \\layout { \\verseChordLayout } }")
+                 (ly:regex-replace (ly:make-regex "(([^ \n]*\\([^()]*,[^()]+\\)[^ \n(]*)+)") (handle-custom-newlines custom-verse-breaks verse) " \\concat { " 1 " } ")
+                "\\textup \\line { \"" 1 "\" " 2 " \"" 3 "\" } \\score { " transp " \\chords { s4 " 4 " } \\layout { \\verselayout } }")
                 )
      ))))
 
 % Kompletter Vers aus dem Akkorde entfernt werden
-#(define-markup-command (nochordverse layout props stanza verse) (markup? string?)
-   #:properties ((intraverse-vspace 0))
+#(define-markup-command (nochordverse layout props stanza verse) (string-or-music? string?)
+   #:properties ((intraverse-vspace 0)(custom-verse-breaks '()))
    "Vers ohne Akkorde"
    (interpret-markup layout props
      (markup #:override `(baseline-skip . ,(+ intraverse-vspace 3.0)) #:anchor-x-between #:stanza stanza
-           #:wrap-newline (ly:regex-replace (ly:make-regex "\\(([^,]*),([^)]*)\\)") verse 1)
+           #:wrap-newline (ly:regex-replace (ly:make-regex "\\(([^,]*),([^)]*)\\)") (handle-custom-newlines custom-verse-breaks verse) 1)
      )
    )
 )
 
 #(define-markup-command (verseformat layout props verse) (markup?)
+   #:properties ((verselayout generalLayout))
    "Textformatierung für Strophen"
    (interpret-markup layout props
-       (make-sans-markup (make-fontsize-markup (ly:output-def-lookup layout 'lyric-size) verse))
+     (let* (
+         (layout-scale (ly:output-def-lookup layout 'output-scale 1.0))
+         (verselayout-scale (ly:output-def-lookup verselayout 'output-scale layout-scale))
+         (mag-scale (/ verselayout-scale layout-scale))
+         (lyric-context-props (ly:context-def-lookup (ly:assoc-get 'Lyrics (ly:output-find-context-def verselayout 'Lyrics)) 'property-ops))
+         (lyric-size (caddr (find (lambda (prop) (and (equal? 'push (car prop)) (equal? 'LyricText (cadr prop)) (equal? 'font-size (cadddr prop)))) lyric-context-props)))
+       )
+       (make-magnify-markup mag-scale (make-sans-markup (make-fontsize-markup lyric-size verse)))
+     )
    )
 )
 
@@ -142,26 +178,158 @@
                  (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))))))
+   (define (add-markup-between-elements reverses markup-between elements)
+     ((if reverses fold fold-right) (lambda (element filled-list)
+              (cons element (if (null? filled-list) '() (cons markup-between filled-list))))
+        '() elements))
+   (let* ((column-item-count (ceiling (/ (length versegroup) verse-cols)))
+          (column-data (make-list verse-cols)))
+    (let columnize-list ((index 0) (items versegroup))
+      (if (not (null? items))
+        (let* ((column-index (if verse-ordering-horizontal
+                                 (modulo index verse-cols)
+                                 (floor (/ index column-item-count))))
+               (column-markups (list-ref column-data column-index)))
+          (list-set! column-data column-index (cons (car items) column-markups))
+          (columnize-list (+ index 1) (cdr items)))))
+    (interpret-markup layout props
+      (make-fill-line-markup (list (make-verseformat-markup (make-line-markup
+        (add-markup-between-elements #f
+          (make-hspace-markup verse-hspace)
+          (map (lambda (column-markups)
+              (make-column-markup
+                (add-markup-between-elements #t (make-vspace-markup verse-vspace) column-markups)))
+            column-data)))))))))
+
+#(define-markup-command (pad-left layout props amount arg)
+  (number? markup?)
+  (let* ((m (interpret-markup layout props arg))
+         (x (ly:stencil-extent m X))
+         (y (ly:stencil-extent m Y)))
+    (ly:stencil-translate
+      (ly:make-stencil (ly:stencil-expr m)
+                       (cons (- (car x) amount) (cdr x))
+                       y)
+      `(,amount . 0))))
+
+#(define-markup-command (pad-right layout props amount arg)
+  (number? markup?)
+  (let* ((m (interpret-markup layout props arg))
+         (x (ly:stencil-extent m X))
+         (y (ly:stencil-extent m Y)))
+      (ly:make-stencil (ly:stencil-expr m)
+                       (cons (car x) (+ (cdr x) amount))
+                       y)))
+
+#(define-markup-command (score-equal-height layout props reference-height lines)
+  (number? markup-list?)
+  #:category music
+  #:properties ((baseline-skip))
+    (stack-stencils Y DOWN baseline-skip
+      (map
+        (lambda (line) (ly:make-stencil (ly:stencil-expr line) (ly:stencil-extent line X) `(,(/ reference-height -2.0) . ,(/ reference-height 2.0))))
+        (interpret-markup-list layout props lines))))
+
+#(define-public (custom-lyric-text::print grob)
+  "Allow interpretation of tildes as lyric tieing marks."
+  ;; See also similar code in Lyric_performer.
+  (let ((text (ly:grob-property grob 'text)))
+
+    (grob-interpret-markup grob (if (string? text)
+                                    (make-pad-right-markup -0.1 (make-tied-lyric-markup text))
+                                    text))))
+
+#(define-markup-command (chordlyrics layout props lyrics) (ly:music?)
+   #:properties ((verse-chords #{#})
+                 (verse-reference-voice #{#})
+                 (verse-break-voice #{#})
+                 (verse-line-height songTextLineHeigth)
+                 (verse-text-chord-distance songTextChordDistance)
+                 (intraverse-vspace 0)
+                 (transposition (cons #f #f))
+                 (verselayout generalLayout))
+  "Vers mit Akkorden"
+  (interpret-markup layout props
+    #{
+      \markup {
+        \override #`(baseline-skip . ,intraverse-vspace)
+        \score-equal-height #verse-line-height \score-lines {
+          \transposable #transposition
+          <<
+            \new Devnull { #verse-break-voice }
+            \new NullVoice = "dummyvoice" { #verse-reference-voice }
+            #(music-clone verse-chords)
+            \new Lyrics \lyricsto "dummyvoice" { #lyrics }
+          >>
+          \layout {
+            \verselayout
+            ragged-right = ##t
+            \context {
+              \Lyrics
+              \override VerticalAxisGroup.nonstaff-relatedstaff-spacing.basic-distance = #verse-text-chord-distance
+              \override LyricText.parent-alignment-X = #LEFT
+              \override LyricText.self-alignment-X = #LEFT
+              \override LyricText.word-space = 0.8
+              \override LyricSpace.minimum-distance = 0.8
+              \override LyricText.stencil = #custom-lyric-text::print
+            }
+            \context {
+              \ChordNames
+              \override VerticalAxisGroup.staff-affinity = ##f
+              \override ChordName.extra-spacing-width = #'(-0.1 . 0.1)
+              \consists \Ensure_first_chord_after_line_break_printed_engraver
+            }
+            \context {
+              \Score
+              \override PaperColumn.keep-inside-line = ##f
+             % \override SpacingSpanner.strict-note-spacing = ##t
+              \override SpacingSpanner.uniform-stretching = ##t
+              \override SpacingSpanner.spacing-increment = 0
+              \remove Bar_number_engraver
+              \remove Mark_engraver
+              \remove Volta_engraver
+              \remove Parenthesis_engraver
+            }
+            \context {
+              \Staff
+              \remove Staff_symbol_engraver
+              \remove Clef_engraver
+              \remove Time_signature_engraver
+              \remove Bar_engraver
+              \remove Separating_line_group_engraver
+              \omit KeySignature
+              \omit KeyCancellation
+            }
+            \context {
+              \Voice
+              \remove Stem_engraver
+              \remove Rest_engraver
+              \remove Multi_measure_rest_engraver
+              \remove Phrasing_slur_engraver
+              \remove Slur_engraver
+              \remove Tie_engraver
+              \remove Dynamic_engraver
+              \remove Note_heads_engraver
+            }
+            \context {
+              \NullVoice
+              \consists Rest_engraver
+              \omit Rest
+             % \undo \omit NoteHead
+             % \hide NoteHead
+            }
+          }
+        }
+      }
+    #}
+  )
+)
+
+#(define-markup-command (nochordlyrics layout props lyrics) (ly:music?)
+    "Vers ohne Akkorde"
+  (interpret-markup layout props
+    (markup
+      #:override `(verse-chords . ,#{#})
+      #:override `(verse-line-height . ,(- songTextLineHeigth 2))
+      #:chordlyrics lyrics))
+)