use lilypond 2.27 and be compatibel to 2.26

* introduce \songsChapter and \markuppage
* have nested chapters in PDF toc

.gitignore

@@ -1,8 +1,8 @@
 # ---> Lilypond
 *.pdf
+*.cho
 *.ps
 *.midi
 *.mid
 *.log
 *~
-

private_includes/base/all.ily

@@ -21,15 +21,28 @@
     )))))
     (scm-load "resolve_inherits.scm")
     (scm-load "yaml_parser.scm")))
-#(define AUTHOR_DATA (if (defined? 'AUTHOR_DATA) AUTHOR_DATA (parse-yml-file "../../lilypond-song-includes/data/authors.yml")))
-#(define SONG_DATA (if (defined? 'SONG_DATA) SONG_DATA (parse-yml-file "../../lilypond-song-includes/data/songs.yml")))
 
+#(define (song-includes-data-path filename)
+  (string-join
+    (list
+      (dirname (dirname (dirname (dirname (current-filename)))))
+      "lilypond-song-includes"
+      "data"
+      filename)
+    file-name-separator-string))
+#(define AUTHOR_DATA (if (defined? 'AUTHOR_DATA) AUTHOR_DATA (parse-yml-file (song-includes-data-path "authors.yml"))))
+#(define SONG_DATA (if (defined? 'SONG_DATA) SONG_DATA (parse-yml-file (song-includes-data-path "songs.yml"))))
+
+\include #(if (ly:version? < '(2 27 0)) "compat_lilypond_2_26.ily" "../void.ily")
 \include "merge_rests_engraver_override.ily"
 \include "basic_format_and_style_settings.ily"
 \include "eps_file_from_song_dir.ily"
+\include "embedded_songs.ily"
 \include "title_with_category_images.ily"
 \include "chord_settings.ily"
+\include "chordpro.ily"
 \include "transposition.ily"
+\include "markup_tag_groups_hack.ily"
 \include "verses_with_chords.ily"
 \include "arrows_in_scores.ily"
 \include "swing_style.ily"
@@ -43,7 +56,10 @@ HEADER = {}
 MUSIC = {}
 TEXT = \markuplist {}
 TEXT_PAGES = #f
+EMBEDDED_SONGS = #'()
 
 verseChords = {}
 firstVoice = {}
 global = {}
+
+\resetTagGroups

private_includes/base/basic_format_and_style_settings.ily

@@ -29,6 +29,11 @@
     (if (null? stanzanumbers)
         refString
         (ly:format refStringWithNumbers (string-join (map (lambda (stanzanumber) (ly:format "~a" stanzanumber)) stanzanumbers) ", ")))))
+  bridgeMarkupFormatter = #(lambda (layout props stanzanumbers)
+    (interpret-markup layout props
+    (if (null? stanzanumbers)
+        bridgeString
+        (ly:format bridgeStringWithNumbers (string-join (map (lambda (stanzanumber) (ly:format "~a" stanzanumber)) stanzanumbers) ", ")))))
 }
 
 generalLayout = \layout {
@@ -49,8 +54,11 @@ generalLayout = \layout {
   \context {
     \Score
     \remove "Bar_number_engraver"
+    \remove "Metronome_mark_engraver"
     \RemoveEmptyStaves
     \override VerticalAxisGroup.remove-first = ##t
+    \numericTimeSignature
+    rehearsalMarkFormatter = #format-mark-box-alphabet
     \overrideTimeSignatureSettings
       4/4               % timeSignatureFraction
       1/4               % baseMomentFraction
@@ -78,6 +86,27 @@ generalLayout = \layout {
   }
 }
 
+#(define (customized-layout base-layout)
+   (let
+     ((custom-size (ly:output-def-lookup base-layout 'size #f)))
+     (if custom-size (layout-set-staff-size custom-size))))
+
+% Scores in Markups (z.B. inline-score) kopieren ihr \layout schon beim Parsen,
+% also bevor customized-layout greift. Deshalb nachträglich anpassen.
+#(define (customize-embedded-score-layouts! obj)
+   (cond
+     ((ly:score? obj)
+      (for-each
+        (lambda (def)
+          (let ((custom-size (ly:output-def-lookup def 'size #f))
+                (scope (ly:output-def-scope def)))
+            (if custom-size
+              (layout-set-absolute-staff-size-in-module scope (* custom-size (eval 'pt scope))))))
+        (ly:score-output-defs obj)))
+     ((pair? obj)
+      (customize-embedded-score-layouts! (car obj))
+      (customize-embedded-score-layouts! (cdr obj)))))
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %%% kleine Helferlein:
 
@@ -126,74 +155,129 @@ romanStanza =
   #(define-music-function (parser location) ()
   #{ \override StanzaNumber.style = #'roman #})
 
+#(define (number-or-number-list? x) (or (number? x) (number-list? x)))
+
+% "1,4" -> (1 4); Einträge, die keine Zahl sind, bleiben Strings ("1b,2b" -> ("1b" "2b"))
+#(define (stanza-numbers-from-string str)
+  (map (lambda (s) (or (string->number s) s))
+       (remove string-null? (map string-trim-both (string-split str #\,)))))
+
+% Kein number? hier, sonst kann der Parser 1,4 nicht mehr als Liste lesen
+#(define (stanza-numbers? x) (or (number-list? x) (string? x)))
+
 override-stanza =
-#(define-music-function (parser location stanzanumbers) (number-list?)
+#(define-music-function (stanzanumbers) (number-or-number-list?)
 #{
-  \once \override StanzaNumber.details.custom-stanzanumber-override = #stanzanumbers
+  \once \override StanzaNumber.details.custom-stanzanumber-override = #(if (number? stanzanumbers) (list stanzanumbers) stanzanumbers)
 #}
 )
 
-#(define (stanza . stanzanumbers)
+#(define (romanize-stanza-numbers numbers style)
+  (if (eq? style 'roman)
+      (map (lambda (n) (if (number? n) (format #f "~@r" n) n)) numbers)
+      numbers))
+
+#(define (format-stanza-numbers numbers style)
+  (string-join
+    (map (lambda (n) (format #f stanzaFormat n)) (romanize-stanza-numbers numbers style))
+    ", "))
+
+% Strophennummer, die erst beim Setzen aus den Eigenschaften des StanzaNumber-Grobs gebaut wird
+% (details.custom-stanza-type, details.custom-stanza-numbers, style, details.custom-inline-text).
+% So können \fstanza, \ref, \bridge und \repStartWithTag im selben Zeitschritt kombiniert werden.
+#(define-markup-command (formatted-stanza layout props) ()
+  #:properties ((details '()) (style #f))
+  (let* ((realstanza (ly:assoc-get 'custom-realstanza details #f))
+         (type (ly:assoc-get 'custom-stanza-type details 'verse))
+         (numbers (ly:assoc-get 'custom-stanzanumber-override details
+                    (ly:assoc-get 'custom-stanza-numbers details '())))
+         (inline-text (ly:assoc-get 'custom-inline-text details #f))
+         (inline-direction (ly:assoc-get 'custom-inline-direction details CENTER))
+         (rep-start (and inline-text (eqv? inline-direction LEFT)))
+         (roman-numbers (romanize-stanza-numbers numbers style))
+         (stanza-stencil
+           (and realstanza
+             (case type
+               ((ref) ((ly:output-def-lookup layout 'refMarkupFormatter) layout props roman-numbers))
+               ((bridge) ((ly:output-def-lookup layout 'bridgeMarkupFormatter) layout props roman-numbers))
+               (else (interpret-markup layout props (format-stanza-numbers numbers style))))))
+         (padded-stanza-stencil
+           (and stanza-stencil
+             (interpret-markup layout props (make-pad-left-markup 1 (make-stencil-markup stanza-stencil))))))
+    (if rep-start
+      (interpret-markup layout props
+        (make-concat-markup
+          (append
+            (if padded-stanza-stencil (list (make-stencil-markup padded-stanza-stencil) (make-hspace-markup 1)) '())
+            (list (make-override-markup '(font-series . normal) inline-text)))))
+      (or padded-stanza-stencil empty-stencil))))
+
+#(define (formatted-stanza-music type stanzanumbers)
 #{
   \once \override StanzaNumber.details.custom-realstanza = ##t % set this to signal that there is a real stanza and no repeat signs
-  \applyContext
+  \once \override StanzaNumber.details.custom-stanza-type = #type
-  #(lambda (context)
+  \once \override StanzaNumber.details.custom-stanza-numbers = #stanzanumbers
-    (let* ((stanzanumbers-override (ly:assoc-get 'custom-stanzanumber-override (ly:assoc-get 'details (ly:context-grob-definition context 'StanzaNumber) '()) #f))
+  \stanza \markup \formatted-stanza
-           (stanza-style (ly:assoc-get 'style (ly:context-grob-definition context 'StanzaNumber)))
+#})
-           (stanza-format (lambda (stanzanumber) (format #f (if (eq? stanza-style 'roman) romanStanzaFormat stanzaFormat) stanzanumber))))
+
-        (ly:context-set-property! context 'stanza
+% \fstanza 1      -> "1."
-          (string-join (map stanza-format
+% \fstanza 1,4    -> "1., 4." (nur im Notenmodus, z.B. \chordverse { \fstanza 1,4 } ...)
-                            (if stanzanumbers-override stanzanumbers-override stanzanumbers))
+% \fstanza "1,4"  -> "1., 4." (auch im \lyricmode, dort versteht LilyPond 1,4 nicht als Liste)
-                        ", "))))
+fstanza =
-#}
+#(define-music-function (stanzanumbers) (stanza-numbers?)
-)
+  (formatted-stanza-music 'verse
+    (if (string? stanzanumbers) (stanza-numbers-from-string stanzanumbers) stanzanumbers)))
 
 ref =
 #(define-music-function (stanzanumbers lyrics) ((number-list? (list)) ly:music?)
 #{ \lyricmode {
-    \once \override StanzaNumber.details.custom-realstanza = ##t % set this to signal that there is a real stanza and no repeat signs
+    #(formatted-stanza-music 'ref stanzanumbers)
-    \set stanza = #(make-on-the-fly-markup (lambda (layout props m) ((ly:output-def-lookup layout 'refMarkupFormatter) layout props stanzanumbers)) (make-null-markup))
+    #lyrics
+  }
+#}
+)
+
+bridge =
+#(define-music-function (stanzanumbers lyrics) ((number-list? (list)) ly:music?)
+#{ \lyricmode {
+    #(formatted-stanza-music 'bridge stanzanumbers)
     #lyrics
   }
 #}
 )
 
 % 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.details.custom-realstanza = ##t we set that also as stanza.
+% if there is a stanza set by \fstanza in the same moment, \formatted-stanza prints both.
-repStartWithTag = \lyricmode {
+% Sets custom-inline-text for ChordPro export so it can collect the repeat sign separately
+repStartWithTag =
+#(define-music-function () ()
+#{ \lyricmode {
   \tag #'repeats {
-    \applyContext
+    \once \override StanzaNumber.details.custom-inline-text = \repStart
-    #(lambda (context)
+    \once \override StanzaNumber.details.custom-inline-direction = #LEFT
-      (let ((lastStanza (ly:context-property context 'stanza))
+    \stanza \markup \formatted-stanza
-            (printLastStanza (ly:assoc-get 'custom-realstanza (ly:assoc-get 'details (ly:context-grob-definition context 'StanzaNumber) '()) #f))
-            (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.details.custom-inline-text = \repStop
+    \once \override StanzaNumber.details.custom-inline-direction = #RIGHT
     \once \override StanzaNumber.font-series = #'normal
     \once \override StanzaNumber.direction = 1
-    \set stanza = \markup { \repStop }
+    \stanza \markup { \pad-x-right #1 \repStop }
   }
 }
 
 rightHyphen = \lyricmode {
   \once \override StanzaNumber.font-series = #'normal
   \once \override StanzaNumber.direction = 1
-  \set stanza = "-"
+  \stanza "-"
 }
 
 leftHyphen = \lyricmode {
   \once \override StanzaNumber.font-series = #'normal
-  \set stanza = "-"
+  \stanza "-"
 }
 
 multiVerseSkips =
@@ -259,9 +343,23 @@ rufWithMarkup =
      \lyricmode {
        \once \override StanzaNumber.font-series = #'normal
        \once \override StanzaNumber.direction = 1
-       \set stanza = #text
+       \stanza #text
      }
    #})
 ruf =
 #(define-music-function (text) (string?)
-   (rufWithMarkup (make-ruf-style-markup text)))
+   (rufWithMarkup (make-ruf-style-markup text)))
+
+underlineOn =
+#(define-music-function () ()
+   #{
+     \override LyricText.stencil =
+     #(lambda (grob)
+        (grob-interpret-markup grob (make-underline-markup (ly:grob-property grob 'text))))
+   #})
+
+underlineOff =
+#(define-music-function () ()
+   #{
+     \revert LyricText.stencil
+   #})

private_includes/base/chord_settings.ily

@@ -40,34 +40,19 @@ shiftChords = #(define-music-function (parser location xshift chords) (number? l
 
 altChord =
 #(define-music-function (parser location mainchord altchord) (ly:music? ly:music?)
-  (let* ((remove-point-and-click
+  (let* ((chord-name (lambda (in-pitches bass inversion context)
-           (lambda (grob)
+           (make-line-markup (list
-             (ly:grob-set-property! grob 'cause #f)
+             (ignatzek-chord-names in-pitches bass inversion context)
-             (ly:text-interface::print grob)))
+             (make-hspace-markup 0.3)
-         (chord-name (lambda (in-pitches bass inversion context) #{
+             (parenthesis-ignatzek-chord-names (music-pitches (transposable (cons (car (music-pitches mainchord)) (car in-pitches)) (music-clone altchord))) '() '() context)
-           \markup {
+             ))
-             \translate #'(-0.5 . 0)
+           )))
-             \score {
-               \chords { \transposable #(cons (car (music-pitches mainchord)) (car in-pitches)) { #(music-clone mainchord) \klamm #(music-clone altchord) } }
-               \layout {
-                 \LAYOUT
-                 \context {
-                   \ChordNames
-                   \override ChordName.extra-spacing-width = #'(0 . 0.3)
-                   \override ChordName.stencil = #remove-point-and-click
-                 }
-                 \context {
-                   \Score
-                   \override SpacingSpanner.spacing-increment = 0
-                 }
-               }
-             }
-           }#})))
     #{
       \once \set chordNameFunction = #chord-name
       #mainchord
     #}))
 
+
 % Akkorde werden so transponiert, dass sie passen, wenn man mit Kapo im angegebenen Bund spielt
 capoTranspose =
 #(define-music-function (fret chords) (number? ly:music?)
@@ -80,41 +65,8 @@ capoTranspose =
     (ly:make-pitch 0 0)
     chords))
 
-% 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))
+#(define (bassnote-name->german-markup-nosym pitch lowercase?)((chord-name:name-markup 'deutsch) pitch #f))
 
 defaultChordPrintings = {
   <c g>-\markup { \super "5" }
@@ -157,15 +109,15 @@ generalLayout = \layout {
   \generalLayout
   \context {
     \ChordNames
-    \semiGermanChords
     \override ChordName.font-size = \songScoreChordFontSize
     \override ChordName.font-series = \songChordFontSeries
     \override ChordName.font-family = #'serif
     chordNameLowercaseMinor = ##t
     chordChanges = ##t
-    % eigenen chordRootNamer damit F# = Fis und Gb = Ges (also alteration ausgeschrieben)
+    chordRootNamer = #(chord-name:name-markup 'deutsch)
-    chordRootNamer = #note-name->german-markup-nosym
     chordNoteNamer = #bassnote-name->german-markup-nosym
+    additionalPitchPrefix = ""
+
     majorSevenSymbol = "maj7"
     chordNameExceptions = \chordNameExceptions
   }
@@ -203,7 +155,7 @@ Ensure_first_chord_after_line_break_printed_engraver =
                   ; 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)
+                (item::enforce-musical-break-visibility grob)
                 )))))))
 
 % If you add this engraver to ChordNames Context chords get only printed on chordchanges and not at newline.
@@ -214,4 +166,4 @@ Ignoring_newline_chord_changes_engraver =
        ((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)
-                )))))
+                )))))

private_includes/base/compat_lilypond_2_26.ily

@@ -0,0 +1,11 @@
+% Abwärtskompatibilität zu LilyPond 2.26.
+% Wird von all.ily nur eingebunden, wenn die laufende LilyPond-Version älter als 2.27 ist.
+% Alles andere ist für die aktuelle 2.27 geschrieben.
+
+% Ab 2.27 gibt es \stanza als Musikfunktion (StanzaEvent), in 2.26 nur die Kontext-Property stanza.
+stanza =
+#(define-music-function (text) (markup?)
+  (context-spec-music (make-property-set 'stanza text) 'Bottom))
+
+% Ab 2.27 heißt ly:chord-name::after-line-breaking item::enforce-musical-break-visibility.
+#(define item::enforce-musical-break-visibility ly:chord-name::after-line-breaking)

private_includes/base/default_songinfo_style.ily

@@ -2,16 +2,18 @@
   poetPrefix = "Worte:"
   composerPrefix = "Weise:"
   compositionPrefix = "Satz:"
-  adaptionTextPrefix = "Bearbeitung Text:"
+  adaptionTextPrefix = "Bearbeitung:"
-  adaptionMusicPrefix = "Bearbeitung Musik:"
+  adaptionMusicPrefix = "Bearbeitung:"
   poetAndComposerEqualPrefix = "Worte und Weise:"
   voicePrefix = "Stimme:"
   versePrefix = "Strophe:"
+  refPrefix = "Refrain:"
   translationAuthorPrefix = "Übersetzung:"
   translationPrefix = "Übersetzung:"
   pronunciationPrefix = "Aussprache:"
   interludePrefix = "Zwischenspiel:"
   bridgePrefix = "Bridge:"
+  author-joiner = #(lambda (author-list) (string-join author-list ", "))
 
   authorFormat =
     #(lambda (noDetails name trail_name birth_year death_year organization)
@@ -31,6 +33,114 @@
               ""
           )))
 
+  authorContributionFormat =
+    #(lambda* (render-contribution-group render-partial-contribution-group #:key
+        (poetIds '())
+        (translatorIds '())
+        (versePoetData '())
+        (composerIds '())
+        (verseComposerData '())
+        (refComposerIds '())
+        (voiceComposerData '())
+        (compositionIds '())
+        (adaptionTextIds '())
+        (adaptionMusicIds '())
+        (bridgeIds '())
+        (interludeIds '())
+        (year_text #f)
+        (year_translation #f)
+        (year_melody #f)
+        (year_melody_meloref #f)
+        (year_composition #f)
+        (year_adaption_text #f)
+        (year_adaption_music #f)
+        (poetAndComposerEqualPrefix "")
+        (poetPrefix "")
+        (composerPrefix "")
+        (translationAuthorPrefix "")
+        (pronunciationPrefix "")
+        (compositionPrefix "")
+        (adaptionTextPrefix "")
+        (adaptionMusicPrefix "")
+        (bridgePrefix "")
+        (interludePrefix "")
+        (refPrefix ""))
+      (if (and
+            (equal? poetIds composerIds)
+            (null? translatorIds)
+            (null? versePoetData)
+            (null? verseComposerData)
+            (null? refComposerIds)
+            (null? voiceComposerData)
+            (null? compositionIds)
+            (null? adaptionTextIds)
+            (null? adaptionMusicIds)
+            (null? bridgeIds)
+            (null? interludeIds))
+        (list
+          (join-present (list
+            (render-contribution-group 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
+              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 adaptionTextPrefix adaptionTextIds)
+                  year_adaption_text
+                ) ", ")
+                (join-present (list
+                  (render-contribution-group translationAuthorPrefix translatorIds)
+                  year_translation
+                ) ", ")
+              ) "; ")
+            ))
+          (if (and
+                (null? composerIds)
+                (null? compositionIds)
+                (null? adaptionMusicIds)
+                (null? verseComposerData)
+                (null? refComposerIds)
+                (null? voiceComposerData)
+                (null? bridgeIds)
+                (null? interludeIds)) #f
+            (string-append
+              composerPrefix
+              " "
+              (join-present (list
+                (join-present (list
+                  (render-contribution-group "" composerIds)
+                  year_melody
+                ) ", ")
+                (render-partial-contribution-group 'versePrefix verseComposerData)
+                (join-present (list
+                  (render-contribution-group refPrefix refComposerIds)
+                  year_melody_meloref
+                ) ", ")
+                (render-partial-contribution-group 'voicePrefix voiceComposerData)
+                (join-present (list
+                  (render-contribution-group compositionPrefix compositionIds)
+                  year_composition
+                ) ", ")
+                (join-present (list
+                  (render-contribution-group adaptionMusicPrefix adaptionMusicIds)
+                  year_adaption_music
+                ) ", ")
+                (render-contribution-group bridgePrefix bridgeIds)
+                (render-contribution-group interludePrefix interludeIds)
+              ) "; ")
+            )))))
+
+
   songinfoMarkup =
     #(make-on-the-fly-markup
       (lambda (layout props m)
@@ -45,13 +155,15 @@
               (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))
+              (concat-markupped-strings (lambda (text)
+                (ly:regex-replace (ly:make-regex "(\\S+)(\\\\\\w+(?:\\s+\\[^\\{\\s]*|\\s*\\{[^\\}]*\\}))(\\S*)") text "\\concat {" 1 "\\line {" 2 "}" 3 "}")))
               (string-with-paragraphs->markuplist (lambda (prefix text)
                 (if text
                   (apply append
                     (map
                       (lambda (paragraph)
                         (make-wordwrap-internal-markup-list #t
-                          #{ \markuplist { $(ly:parser-include-string paragraph) } #}))
+                          #{ \markuplist { $(ly:parser-include-string (concat-markupped-strings paragraph)) } #}))
                       (ly:regex-split (ly:make-regex "\r?\n[ \t\r\n]*\n[ \t\r\n]*") (string-append prefix text))))
                   '())))
               (poet-and-composer-markup-list
@@ -75,4 +187,4 @@
                   )))))
       (make-null-markup)
     )
-}
+}

private_includes/base/default_style.ily

@@ -16,9 +16,10 @@ songTocColumns = 3
 globalSize = 15
 lyricSize = 1.6
 stanzaFormat = "~a."
-romanStanzaFormat = "~@r."
 refString = "Ref.:"
 refStringWithNumbers = "Ref. ~a:"
+bridgeString = "Bridge:"
+bridgeStringWithNumbers = "Bridge ~a:"
 % hübsche Wiederholungszeichen für den Liedtext
 repStart = "𝄆"
 repStop = "𝄇"

private_includes/base/embedded_songs.ily

@@ -0,0 +1,157 @@
+%% Mehrere Lieder in einer Liederdatei (z.B. zwei Lieder auf einer Seite)
+%%
+%% Das erste Lied ist das Hauptlied (HEADER), alle weiteren werden als
+%% eingebettete Lieder angemeldet. Eingebettete Lieder bekommen eigene
+%% Eintraege im Inhaltsverzeichnis, in den Kategorie-, Autoren- und
+%% Kapitelverzeichnissen, im PDF-Inhaltsverzeichnis, in der toc.csv und
+%% eine eigene Liednummer. Im Footer steht die Songinfo des letzten
+%% eingebetteten Lieds (abschaltbar mit footersong = ##f im HEADER bzw. mit
+%% footersong = \andereslied umstellbar), die Songinfo des Hauptlieds wird
+%% mit \songinfo-of selbst platziert.
+%%
+%% Beispiel:
+%%
+%%   \include "../../lilypond-song-includes/liedbausteine/lied_a.ly"
+%%   liedA = \captureSong
+%%   \include "../../lilypond-song-includes/liedbausteine/lied_b.ly"
+%%   liedB = \captureSong
+%%
+%%   TEXT = \markuplist {
+%%     \songinfo-of \liedA
+%%     \vspace #2
+%%     \embedded-song-title \liedB
+%%     \vspace #.5
+%%     \score { \songMusic \liedB \layout { \LAYOUT } }
+%%     \with-song \liedB {
+%%       \chordlyrics \secondVerse
+%%     }
+%%   }
+%%
+%%   \restoreSong \liedA
+%%   \embedSong \liedB
+%%   \include "public_includes/layout_bottom.ily"
+%%
+%% \captureSong sichert den Header (basicSongInfo) und die Variablen aus
+%% captured-song-variable-names, damit das naechste \include sie nicht
+%% ueberschreibt. Das Ergebnis ist ein normales Header-Modul, es kann also
+%% auch in \header { \liedA } verwendet werden.
+%%
+%% \restoreSong setzt basicSongInfo, HEADER und diese Variablen zurueck,
+%% TEXT aber nicht. TEXT also vor \restoreSong schreiben, solange darin noch
+%% Variablen des zuletzt eingebundenen Lieds (\secondVerse usw.) stehen.
+%%
+%% Ohne \with-song beziehen sich Strophen mit Akkorden auf das Hauptlied.
+%%
+%% Alle Verzeichniseintraege zeigen auf die erste Seite des Hauptlieds.
+
+#(define captured-song-variable-names '(MUSIC global firstVoice verseChords))
+
+#(define (song-variable song name)
+  (assq-ref (module-ref song 'captured-song-variables '()) name))
+
+#(define (extract-and-check-vars-from-module headermodule varlist)
+  (let* ((headervars (if (module? headermodule) (hash-map->list cons (struct-ref headermodule 0)) '()))
+         (extract-var-and-check (lambda (headervar)
+           (let* ((variableref (assoc-ref headervars headervar))
+                  (extracted (if variableref (variable-ref variableref) #f)))
+              (if (and extracted (not (and (string? extracted) (string-null? extracted)))) extracted #f)))))
+    (map (lambda (varsymbol)
+      (cons varsymbol (extract-var-and-check varsymbol))
+    ) varlist)))
+
+% Text des PDF-Lesezeichens eines Lieds, #f wenn es keins bekommt.
+% Gleiche Regel wie in build-full-title.
+#(define (song-pdf-bookmark-title headermodule)
+  (let* ((vars (extract-and-check-vars-from-module headermodule '(title starttext)))
+         (title (assq-ref vars 'title))
+         (starttext (assq-ref vars 'starttext))
+         (as-string (lambda (m) (if (markup? m) (markup->string m) ""))))
+    (cond ((and title starttext) (string-append (as-string starttext) " | " (as-string title)))
+          (title (as-string title))
+          (starttext (string-append (as-string starttext) " | "))
+          (else #f))))
+
+#(define (embedded-song-list songs)
+  (if (list? songs) (filter module? songs) '()))
+
+#(define (embedded-songs-of-header headermodule)
+  (if (module? headermodule)
+    (embedded-song-list (module-ref headermodule 'embeddedsongs '()))
+    '()))
+
+% Ersetzt alle header:*-Properties durch die Felder aus headermodule, damit
+% keine Felder des Hauptlieds in das andere Lied durchsickern.
+#(define (header-module->props headermodule props)
+  (let ((header-key? (lambda (entry)
+          (and (pair? entry) (symbol? (car entry))
+               (string-prefix? "header:" (symbol->string (car entry)))))))
+    (cons
+      (map (lambda (kv) (cons (symbol-append 'header: (car kv)) (cdr kv)))
+           (ly:module->alist headermodule))
+      (map (lambda (alist) (remove header-key? alist)) props))))
+
+captureSong =
+#(define-scheme-function () ()
+  (let ((song (make-module)))
+    (ly:module-copy song basicSongInfo)
+    (module-define! song 'captured-song-variables
+      (filter-map
+        (lambda (name)
+          (let ((value (ly:parser-lookup name)))
+            (and (not (null? value)) (cons name value))))
+        captured-song-variable-names))
+    song))
+
+% Stellt basicSongInfo, HEADER und die gesicherten Variablen eines Lieds
+% wieder her, als waere es das zuletzt eingebundene.
+restoreSong =
+#(define-void-function (song) (module?)
+  (for-each
+    (lambda (kv) (ly:parser-define! (car kv) (cdr kv)))
+    (module-ref song 'captured-song-variables '()))
+  (ly:parser-define! 'basicSongInfo song)
+  (ly:parser-define! 'HEADER #{ \bookpart { \header { $song } } #}))
+
+embedSong =
+#(define-void-function (song) (module?)
+  (set! EMBEDDED_SONGS (append EMBEDDED_SONGS (list song))))
+
+songMusic =
+#(define-music-function (song) (module?)
+  (let ((music (song-variable song 'MUSIC)))
+    (if (ly:music? music) music (make-music 'SequentialMusic))))
+
+% Strophen, \fromproperty #'header:... usw. beziehen sich innerhalb auf das
+% angegebene Lied. Die Transposition des Hauptlieds wird nicht uebernommen.
+#(define-markup-list-command (with-song layout props song args) (module? markup-list?)
+  (let* ((music-or-empty (lambda (name)
+           (let ((music (song-variable song name)))
+             (if (ly:music? music) music (make-music 'SequentialMusic)))))
+         (verseChords (music-or-empty 'verseChords))
+         (global (music-or-empty 'global))
+         (firstVoice (music-or-empty 'firstVoice)))
+    (interpret-markup-list layout
+      (prepend-alist-chain 'verse-chords #{ \chords { $verseChords } #}
+        (prepend-alist-chain 'verse-reference-voice #{ $global $firstVoice #}
+          (prepend-alist-chain 'transposition (cons #f #f)
+            (header-module->props song props))))
+      args)))
+
+#(define-markup-command (songinfo-of layout props song) (module?)
+  (interpret-markup layout (header-module->props song props)
+    (make-fractional-line-width-markup (make-songinfo-content-markup))))
+
+#(define-markup-command (embedded-song-title layout props song) (module?)
+  (interpret-markup layout (header-module->props song props)
+    (make-fill-line-markup (list (ly:output-def-lookup layout 'defaultTitleMarkup)))))
+
+% PDF-Lesezeichen der eingebetteten Lieder, wird von build-full-title direkt
+% nach dem Lesezeichen des Hauptlieds ausgegeben.
+#(define-markup-command (embedded-songs-to-pdf-toc layout props) ()
+  (apply ly:stencil-add
+    (cons empty-stencil
+      (filter-map
+        (lambda (song)
+          (let ((bookmark (song-pdf-bookmark-title song)))
+            (and bookmark (make-pdf-toc-stencil bookmark 0))))
+        (embedded-song-list (chain-assoc-get 'header:embeddedsongs props '()))))))

private_includes/base/eps_file_from_song_dir.ily

@@ -6,10 +6,20 @@
 #(define-markup-command (customEps layout props ysize filename)(number? string?)
    #:properties ((songfilename ""))
    (interpret-markup layout props
-     (let ((defaulttitlemarkup (ly:output-def-lookup layout 'defaultTitleMarkup))
+     (let* ((defaulttitlemarkup (ly:output-def-lookup layout 'defaultTitleMarkup))
-           (filepath (if (string-null? songfilename)
+            ;; Determine the song directory to resolve the EPS relative to.
-                          filename
+            ;; In TEXT the name arrives via the markup props (\setsongfilename),
-                          (ly:format "~a/~a/~a" songPath songfilename filename))))
+            ;; but inside MUSIC (e.g. \mark) the props do not carry it, so we
+            ;; fall back to the value stored in the score's \layout block.
+            (layout-songfilename (ly:output-def-lookup layout 'songfilename #f))
+            (songdir (cond ((not (string-null? songfilename)) songfilename)
+                           ((and (string? layout-songfilename)
+                                 (not (string-null? layout-songfilename)))
+                            layout-songfilename)
+                           (else #f)))
+            (filepath (if songdir
+                          (ly:format "~a/~a/~a" songPath songdir filename)
+                          filename)))
        (if (file-exists? filepath)
              (make-epsfile-markup Y ysize filepath)
              (if defaulttitlemarkup

private_includes/base/footer_with_songinfo.ily

@@ -30,7 +30,11 @@
       (lambda (a b) (< (cadr a) (cadr b))))
     (list)))
 
-#(define-markup-command (print-songinfo layout props) ()
+#(define (join-present items joiner)
+  (string-join (filter (lambda (item) (and (string? item) (not (string-null? (string-trim-both item))))) items) joiner))
+
+% Songinfo aus den header:*-Properties, ohne Pruefung auf die letzte Seite.
+#(define-markup-command (songinfo-content layout props) ()
   (define (songinfo-from songId key)
     (let ((song (if (defined? 'SONG_DATA) (assoc-ref SONG_DATA songId) #f)))
       (if song
@@ -74,11 +78,7 @@
   (define (render-contribution-group contributionPrefix authorIds)
     (if (null? authorIds)
       ""
-      (string-append contributionPrefix " " (string-join (format-authors authorIds) ", ")))
+      (string-append contributionPrefix " " ((ly:output-def-lookup layout 'author-joiner) (format-authors authorIds))))
-  )
-
-  (define (join-present items joiner)
-    (string-join (filter (lambda (item) (and (string? item) (not (string-null? (string-trim-both item))))) items) joiner)
   )
 
   (define (render-partial-contribution-group prefixLookup authorData)
@@ -94,99 +94,44 @@
 
   (define (poet-and-composer-from-authors authors)
     (if authors
-      (let (
+      ((ly:output-def-lookup layout 'authorContributionFormat)
-            (poetIds (find-author-ids-by 'text authors))
+        render-contribution-group
-            (translatorIds (find-author-ids-by 'translation authors))
+        render-partial-contribution-group
-            (versePoetData (find-author-id-with-part-numbers 'verse authors))
+        #:poetIds (find-author-ids-by 'text authors)
-            (composerIds (find-author-ids-by 'melody authors))
+        #:translatorIds (find-author-ids-by 'translation authors)
-            (verseComposerData (find-author-id-with-part-numbers 'meloverse authors))
+        #:versePoetData (find-author-id-with-part-numbers 'verse authors)
-            (voiceComposerData (find-author-id-with-part-numbers 'voice authors))
+        #:composerIds (find-author-ids-by 'melody authors)
-            (compositionIds (find-author-ids-by 'composition authors))
+        #:verseComposerData (find-author-id-with-part-numbers 'meloverse authors)
-            (adaptionTextIds (find-author-ids-by 'adaption_text authors))
+        #:refComposerIds (find-author-ids-by 'meloref authors)
-            (adaptionMusicIds (find-author-ids-by 'adaption_music authors))
+        #:voiceComposerData (find-author-id-with-part-numbers 'voice authors)
-            (bridgeIds (find-author-ids-by 'bridge authors))
+        #:compositionIds (find-author-ids-by 'composition authors)
-            (interludeIds (find-author-ids-by 'interlude authors))
+        #:adaptionTextIds (find-author-ids-by 'adaption_text authors)
-            (year_text (chain-assoc-get 'header:year_text props #f))
+        #:adaptionMusicIds (find-author-ids-by 'adaption_music authors)
-            (year_translation (chain-assoc-get 'header:year_translation props #f))
+        #:bridgeIds (find-author-ids-by 'bridge authors)
-            (year_melody (chain-assoc-get 'header:year_melody props #f))
+        #:interludeIds (find-author-ids-by 'interlude authors)
-            (year_composition (chain-assoc-get 'header:year_composition props #f))
+        #:year_text (chain-assoc-get 'header:year_text props #f)
-            (year_adaption_text (chain-assoc-get 'header:year_adaption_text props #f))
+        #:year_translation (chain-assoc-get 'header:year_translation props #f)
-            (year_adaption_music (chain-assoc-get 'header:year_adaption_music props #f))
+        #:year_melody (chain-assoc-get 'header:year_melody props #f)
-            )
+        #:year_melody_meloref (chain-assoc-get 'header:year_melody_meloref props #f)
-        (if (and
+        #:year_composition (chain-assoc-get 'header:year_composition props #f)
-              (equal? poetIds composerIds)
+        #:year_adaption_text (chain-assoc-get 'header:year_adaption_text props #f)
-              (null? translatorIds)
+        #:year_adaption_music (chain-assoc-get 'header:year_adaption_music props #f)
-              (null? versePoetData)
+        #:poetAndComposerEqualPrefix (ly:output-def-lookup layout 'poetAndComposerEqualPrefix)
-              (null? verseComposerData)
+        #:poetPrefix (ly:output-def-lookup layout 'poetPrefix)
-              (null? voiceComposerData)
+        #:composerPrefix (ly:output-def-lookup layout 'composerPrefix)
-              (null? compositionIds)
+        #:translationAuthorPrefix (ly:output-def-lookup layout 'translationAuthorPrefix)
-              (null? adaptionTextIds)
+        #:pronunciationPrefix (ly:output-def-lookup layout 'pronunciationPrefix)
-              (null? adaptionMusicIds)
+        #:compositionPrefix (ly:output-def-lookup layout 'compositionPrefix)
-              (null? bridgeIds)
+        #:adaptionTextPrefix (ly:output-def-lookup layout 'adaptionTextPrefix)
-              (null? interludeIds))
+        #:adaptionMusicPrefix (ly:output-def-lookup layout 'adaptionMusicPrefix)
-          (list
+        #:bridgePrefix (ly:output-def-lookup layout 'bridgePrefix)
-            (join-present (list
+        #:interludePrefix (ly:output-def-lookup layout 'interludePrefix)
-              (render-contribution-group (ly:output-def-lookup layout 'poetAndComposerEqualPrefix) poetIds)
+        #:refPrefix (ly:output-def-lookup layout 'refPrefix))
-              (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 'translationAuthorPrefix) translatorIds)
-                    year_translation
-                  ) ", ")
-                  (join-present (list
-                    (render-contribution-group (ly:output-def-lookup layout 'adaptionTextPrefix) adaptionTextIds)
-                    year_adaption_text
-                  ) ", ")
-                ) "; ")
-              ))
-            (if (and
-                  (null? composerIds)
-                  (null? compositionIds)
-                  (null? adaptionMusicIds)
-                  (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
-                  ) ", ")
-                  (join-present (list
-                    (render-contribution-group (ly:output-def-lookup layout 'adaptionMusicPrefix) adaptionMusicIds)
-                    year_adaption_music
-                  ) ", ")
-                  (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* ((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))
@@ -200,7 +145,7 @@
             (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))))
+            (year_melody (if (string? (cadr 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))
@@ -222,10 +167,25 @@
               #:fontsize songInfoFontSize
               #:sans
               (ly:output-def-lookup layout 'songinfoMarkup)
-            )))
+            ))))
-      (make-null-markup)))
 )
 
+% Songinfo im Footer, nur auf der letzten Seite des Bookparts. Gibt es
+% eingebettete Lieder (siehe embedded_songs.ily), steht hier die Songinfo des
+% letzten eingebetteten Lieds, ausser im Header ist footersong gesetzt
+% (##f = Hauptlied, oder ein mit \captureSong gesichertes Lied).
+#(define-markup-command (print-songinfo layout props) ()
+  (if (chain-assoc-get 'page:is-bookpart-last-page props #f)
+    (let* ((footersong (chain-assoc-get 'header:footersong props 'auto))
+           (embedded (embedded-song-list (chain-assoc-get 'header:embeddedsongs props '())))
+           (song (if (eq? footersong 'auto)
+                     (and (pair? embedded) (last embedded))
+                     footersong)))
+      (interpret-markup layout
+        (if (module? song) (header-module->props song props) props)
+        (make-songinfo-content-markup)))
+    (interpret-markup layout props (make-null-markup))))
+
 #(define-markup-command (print-pagenumber layout props)()
   (let ((label (chain-assoc-get 'header:myindexlabel props #f)))
    (interpret-markup layout props
@@ -270,4 +230,4 @@
       \line { \page-number-to-pdf-label \null }
     }
   }
-}
+}

private_includes/base/markup_tag_groups_hack.ily

@@ -0,0 +1,16 @@
+% We have to record the tag groups for markup, so we use the right tag groups during markup interpretiton.
+recordedTagGroups = #'()
+
+tagGroup =
+#(define-void-function (tags) (symbol-list?)
+   (let ((err (define-tag-group tags)))
+     (if err (ly:parser-error err (*location*))
+         (set! recordedTagGroups (cons tags recordedTagGroups)))))
+
+#(define-markup-command (handle-tag-groups layout props recorded-groups m) (list? markup?)
+   (resetTagGroups)
+   (for-each
+     (lambda (group)
+       (define-tag-group group))
+     recorded-groups)
+   (interpret-markup layout props m))

private_includes/base/swing_style.ily

@@ -1,4 +1,4 @@
-swing = \mark \markup {
+swing = \textMark \markup {
   \line \general-align #Y #DOWN {
     \score {
       \new Staff \with {
@@ -47,7 +47,7 @@ swing = \mark \markup {
   }
 }
 
-swingOff = \mark \markup {
+swingOff = \textMark \markup {
   \line \general-align #Y #DOWN {
     \score {
       \new Staff \with {
@@ -99,7 +99,7 @@ swingOff = \mark \markup {
 \include "swing.ly"
 
 swingMusic =
-#(define-music-function (parser location music) (ly:music?)
+#(define-music-function (music) (ly:music?)
   (define (partial-duration-length m)
     (let ((name (ly:music-property m 'name))
           (es (ly:music-property m 'elements))
@@ -118,4 +118,4 @@ swingMusic =
 #{
   \swing
   \applySwingWithOffset 8 #'(2 1) #(partial-duration-length music) #music
-#})
+#})

private_includes/base/title_with_category_images.ily

@@ -1,6 +1,5 @@
 #(define-markup-command (bookTitleMarkupCustom layout props)()
-   (interpret-markup layout
+   (interpret-markup layout props
-     (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))
@@ -27,34 +26,60 @@
 
 #(define pdf-encode (@@ (lily framework-ps) pdf-encode))
 % PDF tags
-#(define-markup-command (title-to-pdf-toc layout props title) (string?)
+% Erzeugt ein PDF-Lesezeichen (Outline-Eintrag) auf der aktuellen Seite.
+% count = Anzahl der direkten Unterpunkte, die (in Seitenreihenfolge) direkt
+%   nachfolgen. 0 = Blatt-Eintrag (kein /Count), >0 = aufgeklappt,
+%   <0 = zugeklappt (Betrag = Anzahl direkter Kinder).
+#(define (make-pdf-toc-stencil title count)
   (if (string-null? title)
      empty-stencil
      (ly:make-stencil
       (list 'embedded-ps
              (ly:format
-              "[/Action /GoTo /View [/XYZ -4 currentpagedevice /PageSize get 1 get 4 add null] /Title (~a) /OUT pdfmark" (pdf-encode title)))
+              "[~a/Action /GoTo /View [/XYZ -4 currentpagedevice /PageSize get 1 get 4 add null] /Title (~a) /OUT pdfmark"
+              (if (= count 0) "" (ly:format "/Count ~a " count))
+              (pdf-encode title)))
       empty-interval empty-interval
       ;'(0 . 0) '(0 . 0)
       )))
 
-#(define-markup-command (title-with-category-images layout props right)(boolean?)
+% Einzelner (Blatt-)Eintrag im PDF-Inhaltsverzeichnis.
-   (interpret-markup layout props
+#(define-markup-command (title-to-pdf-toc layout props title) (string?)
+  (make-pdf-toc-stencil title 0))
+
+% Kapitel-Eintrag mit verschachtelten Unterpunkten.
+% count = Anzahl der direkt nachfolgenden Einträge, die diesem Kapitel
+%   untergeordnet werden sollen (positiv = aufgeklappt, negativ = zugeklappt).
+#(define-markup-command (chapter-to-pdf-toc layout props count title) (integer? string?)
+  (make-pdf-toc-stencil title count))
+
+#(define-markup-command (build-full-title layout props right)(boolean?)
+   (interpret-markup layout (prepend-alist-chain 'songfilename (chain-assoc-get 'header:songfilename props "") props)
      (let* ((title (chain-assoc-get 'header:title props ""))
             (starttext (chain-assoc-get 'header:starttext props #f))
-            (pdfbookmark (if starttext (string-append starttext " | " title) title)))
+            (pdfbookmark (if starttext (string-append starttext " | " title) title))
+            (chaptertitle (chain-assoc-get 'header:chaptertitle props #f))
+            (chaptercount (chain-assoc-get 'header:chaptercount props 0))
+            (title-markup (ly:output-def-lookup layout (if right 'oddTitleLineMarkup 'evenTitleLineMarkup))))
      (if title
-       (if right
+       ;; Ist dieses Lied das erste eines Kapitels, wird der Kapitel-Eintrag
-         #{\markup { \title-to-pdf-toc #pdfbookmark \fill-line \general-align #Y #UP { \null \bookTitleMarkupCustom \category-images } } #}
+       ;; unmittelbar vor dem Lied-Eintrag ausgegeben, damit die pdfmark-/OUT-
-         #{\markup { \title-to-pdf-toc #pdfbookmark \fill-line \general-align #Y #UP { \category-images \bookTitleMarkupCustom \null } } #})
+       ;; Reihenfolge (Elternteil vor Kindern) im PDF-Stream garantiert stimmt.
-      #{ \markup { " " } #})
+       ;; Eingebettete Lieder (embedded_songs.ily) folgen direkt nach dem Lied.
+       (if (and (string? chaptertitle) (not (string-null? chaptertitle)))
+         (markup #:chapter-to-pdf-toc chaptercount chaptertitle
+                 #:title-to-pdf-toc pdfbookmark #:embedded-songs-to-pdf-toc title-markup)
+         (markup #:title-to-pdf-toc pdfbookmark #:embedded-songs-to-pdf-toc title-markup))
+       make-null-markup)
      )))
 
 \paper {
   bookTitleMarkup = \markup \null
   scoreTitleMarkup = \markup \null
-  oddHeaderMarkup = \markup { \if \on-first-page-of-part \title-with-category-images ##t }
+  oddHeaderMarkup = \markup { \if \on-first-page-of-part \build-full-title ##t }
-  evenHeaderMarkup = \markup { \if \on-first-page-of-part \title-with-category-images ##f }
+  evenHeaderMarkup = \markup { \if \on-first-page-of-part \build-full-title ##f }
+  oddTitleLineMarkup = \markup { \fill-line \general-align #Y #UP { \null \bookTitleMarkupCustom \category-images } }
+  evenTitleLineMarkup = \markup { \fill-line \general-align #Y #UP { \category-images \bookTitleMarkupCustom \null } }
   defaultTitleMarkup = \markup {
     \override #'(baseline-skip . 3.5)
     \center-column {
@@ -63,4 +88,4 @@
       \smaller \bold \fromproperty #'header:subsubtitle
     }
   }
-}
+}

private_includes/base/transposition.ily

@@ -2,7 +2,12 @@ TRANSPOSITION = #(cons #f #f)
 
 transposeGlobal =
 #(define-void-function (from to) (ly:pitch? ly:pitch?)
-   (set! TRANSPOSITION (cons from to)))
+   (if (not (car TRANSPOSITION))
+       (set! TRANSPOSITION (cons from to))
+       (let ((current_to (cdr TRANSPOSITION))
+             (interval (ly:pitch-diff to from)))
+         (set! TRANSPOSITION (cons (car TRANSPOSITION) 
+                                    (ly:pitch-transpose current_to interval))))))
 
 transposable =
 #(define-music-function (fromto music) (pair? ly:music?)

private_includes/base/verses_with_chords.ily

@@ -60,19 +60,20 @@
 
 % Text über Text mittig darstellen
 #(define-markup-command (textup layout props text uptext) (markup? markup?)
+   #:properties ((verselayout generalLayout)
+                 (verse-text-chord-distance songTextChordDistance))
    "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 {
+         \general-align #X #LEFT \override #`(direction . ,UP) \override #'(baseline-skip . 1) \dir-column \chord-alignment-style-dependent {
-           \pad-to-box #'(0 . 0) #'(0 . 2.0) { #text }
+           \pad-to-box #'(0 . 0) #`(0 . ,(- verse-text-chord-distance 0.8)) { #text }
-           \size-box-to-box ##f ##t #uptext \score { \chords { g4:m a } \layout { \verselayout } }
+           \size-box-to-box ##f ##t #uptext \score { \chords { g4:m a } \layout { $verselayout #(customized-layout verselayout) } }
          }
          #text
        }
      #}
-   )))
+   ))
 
 #(define-markup-command (anchor-x-between layout props arga argb)
    (markup? markup?)
@@ -82,16 +83,15 @@
             (ly:stencil-aligned-to m X (- (/ (* la 2) l) 1))
      ))
 
-#(define-markup-command (stanza-raw layout props arg)
+#(define-markup-command (stanza-raw layout props arg) (string-or-music?)
-   (string-or-music?)
+   #:properties ((verselayout generalLayout))
-   (let ((verselayout (chain-assoc-get 'verselayout props generalLayout)))
    (interpret-markup layout props
      (if (and (string? arg) (string-null? arg))
          " "
          #{\markup
-           \score { \new Lyrics { \lyricmode { #(if (ly:music? arg) arg #{ \set stanza = #arg #}) "" } } \layout { \verselayout } }
+           \score { \new Lyrics { \lyricmode { #(if (ly:music? arg) arg #{ \stanza #arg #}) "" } } \layout { $verselayout #(customized-layout verselayout) } }
          #}
-     ))))
+     )))
 
 #(define-markup-command (stanza layout props arg)
    (string-or-music?)
@@ -141,7 +141,7 @@
        (make-wrap-newline-markup
                (ly:regex-replace (ly:make-regex "\\(( *)([^,()]*)( *),([^)]*)\\)")
                  (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 } }")
+                "\\textup \\line { \"" 1 "\" " 2 " \"" 3 "\" } \\score { " transp " \\chords { s4 " 4 " } \\layout { $verselayout #(customized-layout verselayout) } }")
                 )
      ))))
 
@@ -203,23 +203,9 @@
 
 #(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)
+      (interpret-markup layout props (make-pad-x-left-markup amount arg))
-                       (cons (- (car x) amount) (cdr x))
+      `(,amount . 0)))
-                       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-with-indents layout props lines)
   (markup-list?)
@@ -250,9 +236,145 @@
   (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))
+                                    (make-pad-x-right-markup -0.1 (make-tied-lyric-markup text))
                                     text))))
 
+Chord_lyrics_spacing_engraver =
+#(lambda (ctx)
+   (let ((last-lyric-syllable #f)
+         (lyric-width-since-last-chord 0)
+         (music-columns-for-last-syllable 0)
+         (last-printed-chord #f)
+         (chord-width-since-last-lyric 0)
+         (lyrics-seen-since-break #f)
+         (have-a-rest #f)
+         (stanza #f)
+         ; Akkord auf einer Skip-Silbe "_" nach Wortende soll über die folgende Silbe
+         (word-continues #f)
+         (continuation-this-step #f)
+         (lyric-skip-this-step #f)
+         (syllable-this-step #f)
+         (chord-this-step #f)
+         (chord-on-lyric-skip #f)
+         (place-at-right-edge
+          (lambda (grob anchor padding)
+            (let ((anchor-width (interval-length (ly:grob-extent anchor anchor X))))
+              (ly:grob-set-parent! grob X anchor)
+              (ly:grob-set-property! grob 'X-offset (+ padding anchor-width))
+              ))))
+     (make-engraver
+      ((start-translation-timestep engraver)
+       (set! continuation-this-step #f)
+       (set! lyric-skip-this-step #f)
+       (set! syllable-this-step #f)
+       (set! chord-this-step #f)
+       )
+      ((stop-translation-timestep engraver)
+       (if (and chord-on-lyric-skip (not (eq? chord-on-lyric-skip chord-this-step)))
+           (begin
+             (if (and syllable-this-step (not chord-this-step))
+                 (begin
+                   (ly:grob-set-parent! chord-on-lyric-skip X syllable-this-step)
+                   (ly:grob-set-property! chord-on-lyric-skip 'X-offset 0)
+                   (ly:grob-set-property! chord-on-lyric-skip 'extra-spacing-width '(+inf.0 . -inf.0))
+                   (set! lyric-width-since-last-chord (interval-length (ly:grob-extent syllable-this-step syllable-this-step X)))))
+             (set! chord-on-lyric-skip #f)))
+       (if syllable-this-step
+           (set! word-continues continuation-this-step))
+       )
+      (listeners
+       ((multi-measure-rest-event engraver event)
+        (set! have-a-rest #t)
+        )
+       ((rest-event engraver event)
+        (set! have-a-rest #t)
+        )
+       ((hyphen-event engraver event)
+        (set! continuation-this-step #t)
+        )
+       ((extender-event engraver event)
+        (set! continuation-this-step #t)
+        )
+       ((lyric-event engraver event)
+        (set! have-a-rest #f)
+        ; "_" wird zu " " und erzeugt keine LyricText
+        (if (equal? (ly:event-property event 'text) " ")
+            (begin
+              (set! lyric-skip-this-step #t)
+              (set! chord-on-lyric-skip #f)))
+        (set! music-columns-for-last-syllable 0)
+        )
+       ((break-event engraver event)
+        (set! last-lyric-syllable #f)
+        (set! lyric-width-since-last-chord 0)
+        (set! music-columns-for-last-syllable 0)
+        (set! last-printed-chord #f)
+        (set! chord-width-since-last-lyric 0)
+        (set! lyrics-seen-since-break #f)
+        (set! chord-on-lyric-skip #f)
+        ))
+      (acknowledgers
+       ((musical-paper-column-interface this-engraver grob source-engraver)
+        (set! music-columns-for-last-syllable (+ 1 music-columns-for-last-syllable))
+        )
+       ((lyric-syllable-interface this-engraver grob source-engraver)
+        (let ((syllable-width (interval-length (ly:grob-extent grob grob X))))
+          (set! lyric-width-since-last-chord (+ lyric-width-since-last-chord syllable-width))
+          )
+        (if (> chord-width-since-last-lyric 0)
+            (if lyrics-seen-since-break
+                (ly:grob-set-property! grob 'extra-spacing-width
+                                       (cons (- chord-width-since-last-lyric) (cdr (ly:grob-property grob 'extra-spacing-width '(0 . 0)))))
+                (if last-printed-chord
+                  (let ((gap-for-starting-rest 2.0))
+                    (if stanza (ly:grob-set-property! stanza 'padding (+ 1 gap-for-starting-rest)))
+                    (ly:grob-set-parent! grob X last-printed-chord)
+                    (ly:grob-set-property! grob 'X-offset gap-for-starting-rest)
+                    )))
+            )
+        (set! syllable-this-step grob)
+        (set! last-lyric-syllable grob)
+        (set! chord-width-since-last-lyric 0)
+        (set! lyrics-seen-since-break #t)
+        )
+       ((chord-name-interface this-engraver grob source-engraver)
+        (if (not (and
+                  (boolean? (ly:grob-property grob 'begin-of-line-visible))
+                  (ly:grob-property grob 'begin-of-line-visible)
+                  lyrics-seen-since-break))
+            (let* ((last-printed-chord-width (if last-printed-chord (interval-length (ly:grob-extent last-printed-chord last-printed-chord X)) 0))
+                   (chord-overwidth (- last-printed-chord-width lyric-width-since-last-chord))
+                   (chord-gap 0.5))
+              (if have-a-rest
+                  (let ((chord-width (interval-length (ly:grob-extent grob grob X))))
+                    (if last-lyric-syllable
+                        (if (and last-printed-chord (> chord-overwidth 0))
+                          (place-at-right-edge grob last-printed-chord chord-gap)
+                          (place-at-right-edge grob last-lyric-syllable 0))
+                        (if last-printed-chord
+                            (place-at-right-edge grob last-printed-chord chord-gap)))
+                    (set! chord-width-since-last-lyric (+ chord-width-since-last-lyric chord-width chord-gap))
+                    ))
+              (if (and last-lyric-syllable last-printed-chord (> chord-overwidth 0))
+                      (ly:grob-set-property! last-lyric-syllable 'extra-spacing-width
+                                             (cons (car (ly:grob-property last-lyric-syllable 'extra-spacing-width '(0 . 0))) (+ chord-gap chord-overwidth)))
+                      )
+              (set! lyric-width-since-last-chord (* (if last-lyric-syllable (interval-length (ly:grob-extent last-lyric-syllable last-lyric-syllable X)) 0) (- 1 (/ 1.0 music-columns-for-last-syllable))))
+              (set! chord-this-step grob)
+              (if (and lyric-skip-this-step (not have-a-rest) (not word-continues))
+                  (set! chord-on-lyric-skip grob))
+              (set! last-printed-chord grob)
+              (set! last-lyric-syllable #f)
+              )
+            (ly:grob-set-property! grob 'X-extent '(+inf.0 . -inf.0))
+            )
+        )
+        ((stanza-number-interface this-engraver grob source-engraver)
+          (set! stanza grob)
+          )
+       )
+      )))
+
 #(define-markup-command (chordlyrics layout props lyrics) (ly:music?)
    #:properties ((verse-chords #{#})
                  (verse-reference-voice #{#})
@@ -272,10 +394,8 @@
             \new Lyrics \lyricsto "dummyvoice" { #lyrics }
           >>
           \layout {
-            \verselayout
+            $verselayout
-            #(let
+            #(customized-layout verselayout)
-              ((custom-size (ly:output-def-lookup verselayout 'size #f)))
-              (if custom-size (layout-set-staff-size custom-size)))
             ragged-right = ##t
             \context {
               \Lyrics
@@ -296,15 +416,20 @@
             \context {
               \Score
               \override PaperColumn.keep-inside-line = ##f
-             % \override SpacingSpanner.strict-note-spacing = ##t
+              % \override SpacingSpanner.strict-note-spacing = ##t
               \override SpacingSpanner.uniform-stretching = ##t
               \override SpacingSpanner.spacing-increment = 0
+              % \override SpacingSpanner.packed-spacing = ##t
+              \consists \Chord_lyrics_spacing_engraver
+              % ChordPro engraver in Score context to collect all data
+              \consists \ChordPro_score_collector
               \remove Bar_number_engraver
               \remove Mark_engraver
               \remove Jump_engraver
               \remove Volta_engraver
               \remove Parenthesis_engraver
               \remove Metronome_mark_engraver
+              \remove Text_mark_engraver
             }
             \context {
               \Staff
@@ -328,14 +453,6 @@
               \remove Note_heads_engraver
               \remove Script_engraver
             }
-            \context {
-              \NullVoice
-              \consists Rest_engraver
-              \omit Rest
-              \undo \omit NoteHead
-              \hide NoteHead
-              \override NoteHead.X-extent = #'(0 . 0)
-            }
           }
         }
       }

private_includes/book/book_include.ily

@@ -119,7 +119,7 @@ width may require additional tweaking.)"
 
 
 includeSong =
-#(define-void-function (parser location filename) (string?)
+#(define-void-function (filename) (string?)
      #{
      \bookOutputName #filename
      #}
@@ -130,32 +130,47 @@ includeSong =
         (acons label additional-page-numbers additional-page-switch-label-list))
       (set! song-list
         (acons (string->symbol filename)
-          (acons 'label label
+          `(
-            (acons 'header HEADER
+            (label . ,label)
-              (acons 'music MUSIC
+            (header . ,HEADER)
-                (acons 'layout LAYOUT
+            (music . ,MUSIC)
-                  (acons 'text-pages
+            (layout . ,LAYOUT)
-                    (map (lambda (text)
+            (text-pages . ,(map (lambda (text)
                       #{ \markuplist \setsongfilename $filename $text #})
-                      TEXT_PAGES)
+                      TEXT_PAGES))
-                    '())))))
+          )
           song-list))
     ))
 
 blankpage =
-#(define-void-function (parser location) ()
+#(define-void-function () ()
     (set! song-list
       (acons 'emptyPage
         '()
         song-list)))
 
 imagepage =
-#(define-void-function (parser location xsize filename) (number? string?)
+#(define-void-function (xsize filename) (number? string?)
     (set! song-list
       (acons 'imagePage
-        (acons 'xsize xsize (acons 'filename filename '()))
+        `((xsize . ,xsize)
+          (filename . ,filename))
         song-list)))
 
+markuppage =
+#(define-void-function (mkup) (markup?)
+    (set! song-list
+      (acons 'markupPage
+        `((markup . ,mkup))
+        song-list)))
+
+#(define chapters '())
+
+songsChapter =
+#(define-void-function (title) (string?)
+    (set! chapters
+      (cons (cons title (length song-list)) chapters)))
+
 #(define-markup-command (pagecenter layout props stuff)(markup?)
    (interpret-markup layout props
      (let ((halfpaperheight (/ (ly:output-def-lookup layout 'paper-height) 2))
@@ -164,53 +179,154 @@ imagepage =
    )))
 
 songs =
-#(define-void-function (parser location) ()
+#(define-void-function () ()
+ (let* ((ordered (reverse song-list))
+        (total (length ordered))
+        ;; Ein Lied erzeugt nur dann einen PDF-Outline-Eintrag (/OUT), wenn
+        ;; title oder starttext gesetzt sind (siehe build-full-title). Nur solche
+        ;; Lieder duerfen als Kapitel-Kinder gezaehlt werden -- sonst wird die
+        ;; /Count zu hoch und der erste Folgeeintrag (z.B. ein spaeteres Kapitel)
+        ;; rutscht faelschlich als Kind mit hinein.
+        ;; Eingebettete Lieder (embedded_songs.ily) haben jeweils ein eigenes
+        ;; Lesezeichen, daher die Anzahl statt eines Booleans.
+        (bookmark-count
+          (lambda (e)
+            (if (or (eq? (car e) 'emptyPage)
+                    (eq? (car e) 'imagePage)
+                    (eq? (car e) 'markupPage))
+                0
+                (let* ((headermodule (ly:book-header (assq-ref (cdr e) 'header)))
+                       (vars (extract-and-check-vars-from-module headermodule '(title starttext))))
+                  (+ (if (or (assq-ref vars 'title) (assq-ref vars 'starttext)) 1 0)
+                     (count song-pdf-bookmark-title (embedded-songs-of-header headermodule)))))))
+        (count-bookmark-songs
+          (lambda (start end)
+            (let loop ((i 0) (l ordered) (c 0))
+              (cond ((or (null? l) (>= i end)) c)
+                    ((< i start) (loop (+ i 1) (cdr l) c))
+                    (else (loop (+ i 1) (cdr l) (+ c (bookmark-count (car l)))))))))
+        ;; chapters: (title . start-index). start-index = Anzahl der song-list-
+        ;; Eintraege beim Aufruf von songsChapter = Index in `ordered`, ab dem
+        ;; das Kapitel beginnt.
+        (chapters-asc (sort chapters (lambda (a b) (< (cdr a) (cdr b)))))
+        ;; pending: aufsteigende Liste von (start title count); count = Anzahl
+        ;; der Lesezeichen-Lieder von diesem Kapitel bis zum Beginn des naechsten.
+        (pending
+          (let loop ((chs chapters-asc) (acc '()))
+            (if (null? chs)
+                (reverse acc)
+                (let* ((title (caar chs))
+                       (start (cdar chs))
+                       (end (if (null? (cdr chs)) total (cdadr chs)))
+                       (cnt (count-bookmark-songs start end)))
+                  (loop (cdr chs) (cons (list start title cnt) acc))))))
+        ;; Aktuell aktives Kapitel (Titel-String) waehrend des Durchlaufs. Wird
+        ;; gesetzt, sobald ein Kapitel aktiviert (aus `pending` entfernt) wird --
+        ;; egal ob auf einer Seite (chapter-prefixed-markup) oder auf dem ersten
+        ;; Song. Jeder danach folgende Song erhaelt dieses Kapitel als
+        ;; chapterref-Header-Feld, woraus toc_include.ily den Kapitel-Index baut.
+        (current-chapter #f)
+        ;; Stellt einer beliebigen Seite (markup-/image-/emptyPage) den Kapitel-
+        ;; Eintrag (chapter-to-pdf-toc) bei, falls an Position `this-index` ein
+        ;; Kapitel faellig ist, und entfernt es aus `pending`. So fuehrt die
+        ;; Kapitel-Referenz zur ersten Seite nach dem \songsChapter -- egal
+        ;; welcher Seitentyp das ist. Der Eintrag wird als unsichtbares Overlay
+        ;; (\combine) beigelegt, damit er das Seitenlayout nicht veraendert;
+        ;; \with-dimensions gibt dem sonst extent-losen pdfmark einen minimalen
+        ;; Extent, damit er auch auf leeren Seiten nicht verworfen wird.
+        (chapter-prefixed-markup
+          (lambda (this-index base-markup)
+            (if (and (pair? pending) (<= (car (car pending)) this-index))
+                (let ((cnt (caddr (car pending)))
+                      (title (cadr (car pending))))
+                  (set! pending (cdr pending))
+                  (set! current-chapter title)
+                  (make-combine-markup
+                    base-markup
+                    (make-with-dimensions-markup '(0 . 0) '(0 . 0.1)
+                      (make-chapter-to-pdf-toc-markup cnt title))))
+                base-markup)))
+        (index 0))
  (for-each (lambda (songitems)
-   (ly:book-add-bookpart! (ly:parser-lookup '$current-book)
+   (let ((this-index index))
-    (let ((filename (car songitems))
+     (set! index (+ index 1))
-          (songvars (cdr songitems)))
+     (ly:book-add-bookpart! (ly:parser-lookup '$current-book)
-      (if (eq? filename 'emptyPage)
+      (let ((filename (car songitems))
-          #{ \bookpart { \markup { \null } } #}
+            (songvars (cdr songitems)))
-      (if (eq? filename 'imagePage)
+        (if (eq? filename 'emptyPage)
-          (let ((xsize (assq-ref songvars 'xsize))
+            #{ \bookpart { \markup { $(chapter-prefixed-markup this-index (make-null-markup)) } } #}
-                (filename (ly:format "~a/~a" imagePagePath (assq-ref songvars 'filename))))
+        (if (eq? filename 'markupPage)
-          #{ \bookpart {
+            ;; Kapitelanfang auf einer markuppage: Kapitel-Eintrag wird dieser
-               \paper {
+            ;; Seite beigelegt (siehe chapter-prefixed-markup).
-                 %{
+            #{ \bookpart { \markup { $(chapter-prefixed-markup this-index (assq-ref songvars 'markup)) } } #}
-                 inner-margin = 0
+        (if (eq? filename 'imagePage)
-                 outer-margin = 0
+            (let* ((xsize (assq-ref songvars 'xsize))
-                 binding-offset = 0
+                   (filename (ly:format "~a/~a" imagePagePath (assq-ref songvars 'filename)))
-                 top-margin = 0
+                   (img-markup #{ \markup { \pagecenter { \epsfile #X #xsize #filename } } #}))
-                 bottom-margin = 0
+            #{ \bookpart {
-                 %}
+                 \paper {
-                 print-page-number = ##f
+                   %{
-                 last-bottom-spacing = #'((basic-distance . 0) (minimum-distance . 0) (padding . 0))
+                   inner-margin = 0
-                 page-count = 1
+                   outer-margin = 0
-              }
+                   binding-offset = 0
-              \markup { \pagecenter { \epsfile #X #xsize #filename } }
+                   top-margin = 0
-          } #}
+                   bottom-margin = 0
-          )
+                   %}
-          (let* ((newnumber (+ 1 song-number))
+                   print-page-number = ##f
-                 (header #{ \bookpart { $(assq-ref songvars 'header) \header {
+                   last-bottom-spacing = #'((basic-distance . 0) (minimum-distance . 0) (padding . 0))
-                   songfilename = $(symbol->string filename)
+                   page-count = 1
-                   myindexlabel = #(assq-ref songvars 'label)
+                }
-                   songnumber = #(number->string newnumber)
+                \markup { $(chapter-prefixed-markup this-index img-markup) }
-                 } } #})
+            } #}
-                 (music (assq-ref songvars 'music))
+            )
-                 (layout (assq-ref songvars 'layout))
+            ;; Ist ein Kapitel faellig (Start <= aktuelle Position) und dies ein
-                 (text-pages (assq-ref songvars 'text-pages))
+            ;; echtes Lied, wird die Kapitelinfo an dieses Lied gehaengt und aus
-                 (label (assq-ref songvars 'label)))
+            ;; `pending` entfernt.
+            (let* ((newnumber (+ 1 song-number))
+                   (chaptertitle (if (and (pair? pending) (<= (car (car pending)) this-index))
+                                     (cadr (car pending)) #f))
+                   (chaptercount (if chaptertitle (caddr (car pending)) 0))
+                   ;; Startet das Kapitel erst auf diesem Song (nicht schon auf
+                   ;; einer vorangehenden Seite), wird current-chapter jetzt
+                   ;; gesetzt und pending entfernt -- vor dem Bau des Headers,
+                   ;; damit chapterref bereits das neue Kapitel enthaelt.
+                   (_ (if chaptertitle
+                          (begin (set! current-chapter chaptertitle)
+                                 (set! pending (cdr pending)))))
+                   (header #{ \bookpart { $(assq-ref songvars 'header) \header {
+                     songfilename = $(symbol->string filename)
+                     myindexlabel = #(assq-ref songvars 'label)
+                     songnumber = #(number->string newnumber)
+                     chaptertitle = #chaptertitle
+                     chaptercount = #chaptercount
+                     chapterref = #current-chapter
+                   } } #})
+                   (music (assq-ref songvars 'music))
+                   (layout (assq-ref songvars 'layout))
+                   (text-pages (assq-ref songvars 'text-pages))
+                   (label (assq-ref songvars 'label))
+                   (toc-music (header-module-to-toc! (ly:book-header header) label)))
             (set! song-number newnumber)
+            ;; Eingebettete Lieder: eigene Liednummer, gleiche Seite (label)
+            (for-each
+              (lambda (song)
+                (let ((tocheader (make-module)))
+                  (set! song-number (+ 1 song-number))
+                  (ly:module-copy tocheader song)
+                  (module-define! tocheader 'songnumber (number->string song-number))
+                  (module-define! tocheader 'chapterref current-chapter)
+                  (header-module-to-toc! tocheader label)))
+              (embedded-songs-of-header (ly:book-header header)))
             #{
               \bookpart {
                 $header
-                \headerToTOC #header #label
+                $toc-music
-                \score { $music \layout { $layout } }
+                \score { $music \layout { $layout songfilename = $(symbol->string filename) } }
                 $(add-text-pages text-pages)
               }
-            #}))))))
+            #}))))))))
-   (reverse song-list)
+   ordered
-   ))
+   )))
 
 #(define (boernel-stats)
    (let (

private_includes/book/toc_include.ily

@@ -90,7 +90,7 @@
      (for-each (lambda (category)
             (let* ((catsym (string->symbol category))
                    (catlist (hashq-ref category-index-hash catsym
-                              (list (list label 'indexCategoryMarkup `(((rawtext . ,category))))))))
+                              (list (list label 'indexCategoryMarkup `(((combine-with-next . #t) (rawtext . ,category))))))))
               (if (assq catsym category-names)
                 (hashq-set! category-index-hash catsym
                   (cons (list label markup-symbol textoptions) catlist))
@@ -114,7 +114,7 @@
      (for-each (lambda (authorID)
             (let* ((authorsym (string->symbol authorID))
                    (authorlist (hashq-ref author-index-hash authorsym
-                              (list (list label 'indexAuthorMarkup `(((rawtext . ,authorID))))))))
+                              (list (list label 'indexAuthorMarkup `(((combine-with-next . #t) (rawtext . ,authorID))))))))
                 (hashq-set! author-index-hash authorsym
                   (cons (list label markup-symbol textoptions) authorlist))
                 ))
@@ -132,6 +132,37 @@
                 author-index-hash)
               (lambda (a b) (string-ci<? (car a) (car b))))))))
 
+% code for chapter index
+% Anders als bei Kategorien/Autoren ergibt sich die Kapitelzugehoerigkeit nicht
+% aus dem Song-Header, sondern aus dem \songsChapter, das dem Song vorangeht
+% (in book_include.ily als Header-Feld chapterref an jeden Song gehaengt).
+% Die Kapitel behalten hier ihre Auftritts-Reihenfolge (nicht alphabetisch),
+% ebenso die Songs innerhalb eines Kapitels ihre Song-Reihenfolge.
+#(define*-public (add-chapter-index-item! chapter markup-symbol textoptions #:optional label) #f)
+#(define-public (chapter-index-items) #f)
+
+#(let ((chapter-index-hash (make-hash-table))
+       (chapter-order '()))
+   (set! add-chapter-index-item!
+   (lambda* (chapter markup-symbol textoptions #:optional (label (gensym "index")))
+     (let* ((chaptersym (string->symbol chapter))
+            (existing (hashq-ref chapter-index-hash chaptersym #f))
+            (chapterlist (or existing
+                           (begin
+                             (set! chapter-order (cons chaptersym chapter-order))
+                             (list (list label 'indexChapterMarkup `(((combine-with-next . #t) (rawtext . ,chapter))))))))
+            )
+       (hashq-set! chapter-index-hash chaptersym
+         (cons (list label markup-symbol textoptions) chapterlist)))
+       (make-music 'EventChord
+         'page-marker #t
+         'page-label label
+         'elements (list (make-music 'LabelEvent
+         'page-label label)))))
+   (set! chapter-index-items (lambda ()
+          (append-map (lambda (chaptersym) (reverse (hashq-ref chapter-index-hash chaptersym (list))))
+            (reverse chapter-order)))))
+
 
 #(define-markup-command (with-link-symbol-ref layout props symbol arg)
    (symbol? markup?)
@@ -215,37 +246,52 @@
         (make-null-markup))
     \vspace #.4
   }
+  indexChapterMarkup = \markup \override #'(baseline-skip . 1.5) \left-column {
+    \vspace #1
+    \sans \bold \fontsize #3 \fromproperty #'index:text
+    \vspace #.4
+  }
 }
 
 #(define (prepare-item-markup items layout)
-   (map (lambda (index-item)
+  (define (single-item-markup index-item)
-         (let* ((label (car index-item))
+    (let* ((label (car index-item))
-                (index-markup (cadr index-item))
+           (index-markup (cadr index-item))
-                (textoptions (caddr index-item))
+           (textoptions (caddr index-item))
-                (text (chain-assoc-get 'rawtext textoptions))
+           (text (chain-assoc-get 'rawtext textoptions))
-                (alternative (chain-assoc-get 'alternative textoptions))
+           (alternative (chain-assoc-get 'alternative textoptions))
-                (songnumber (chain-assoc-get 'songnumber textoptions)))
+           (songnumber (chain-assoc-get 'songnumber textoptions)))
-           (markup #:override (cons 'index:label label)
+      (markup #:override (cons 'index:label label)
-             #:override (cons 'index:page (markup #:custom-page-number label -1))
+        #:override (cons 'index:page (markup #:custom-page-number label -1))
-             #:override (cons 'index:text text)
+        #:override (cons 'index:text text)
-             #:override (cons 'index:alternative alternative)
+        #:override (cons 'index:alternative alternative)
-             #:override (cons 'index:songnumber songnumber)
+        #:override (cons 'index:songnumber songnumber)
-             (ly:output-def-lookup layout index-markup))))
+        (ly:output-def-lookup layout index-markup))))
-       (items)))
+  (if (null? items)
+      items
+      (let* ((index-item (car items))
+             (combine-with-next (chain-assoc-get 'combine-with-next (caddr index-item) #f))
+             (restitems (cdr items))
+             (item-markup (single-item-markup index-item)))
+        (if (and combine-with-next (not (null? restitems)))
+            (cons (make-column-markup (list item-markup (single-item-markup (car restitems)))) (prepare-item-markup (cdr restitems) layout))
+            (cons item-markup (prepare-item-markup restitems 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)
-            ((authors) author-index-items)))
+            ((authors) author-index-items)
+            ((chapters) chapter-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))))))
+          (prepare-item-markup (items) layout))))))
 
 indexItem =
 #(define-music-function (parser location sorttext text) (string? markup?)
@@ -255,36 +301,30 @@ indexItem =
 indexSection =
 #(define-music-function (parser location sorttext text) (string? markup?)
    "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 (prepend-alist-chain 'rawtext text '()) sorttext))
+   (add-index-item! 'indexSectionMarkup (prepend-alist-chain 'combine-with-next #t (prepend-alist-chain 'rawtext text '())) sorttext))
 
 #(define (extract-and-check-vars-from-header bookheader varlist)
-  (let* ((headervars (hash-map->list cons (struct-ref (ly:book-header bookheader) 0)))
+  (extract-and-check-vars-from-module (ly:book-header bookheader) varlist))
-         (extract-var-and-check (lambda (headervar)
-           (let* ((variableref (assoc-ref headervars headervar))
-                  (extracted (if variableref (variable-ref variableref) #f)))
-              (if (and extracted (not (and (string? extracted) (string-null? extracted)))) extracted #f)))))
-    (map (lambda (varsymbol)
-      (cons varsymbol (extract-var-and-check varsymbol))
-    ) varlist)))
 
-headerToTOC = #(define-music-function (parser location header label) (ly:book? symbol?)
+#(define (header-module-to-toc! headermodule label)
     (define (all-author-ids 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))
+            (refComposerIds (find-author-ids-by 'meloref authors))
             (voiceComposerData (find-author-id-with-part-numbers 'voice authors))
             (compositionIds (find-author-ids-by 'composition authors))
             (adaptionIds (find-author-ids-by 'adaption authors))
             (bridgeIds (find-author-ids-by 'bridge authors))
             (interludeIds (find-author-ids-by 'interlude authors)))
         (delete-duplicates
-          (append poetIds translatorIds (map car versePoetData) composerIds (map car verseComposerData) (map car voiceComposerData) compositionIds adaptionIds bridgeIds interludeIds))
+          (append poetIds translatorIds (map car versePoetData) composerIds (map car verseComposerData) refComposerIds (map car voiceComposerData) compositionIds adaptionIds bridgeIds interludeIds))
     ))
     (let*
       (
-       (extractedheadervars (extract-and-check-vars-from-header header '(title starttext alttitle categorytitle categories authors songnumber)))
+       (extractedheadervars (extract-and-check-vars-from-module headermodule '(title starttext alttitle categorytitle categories authors songnumber chapterref)))
        (title (assq-ref extractedheadervars 'title))
        (starttext (assq-ref extractedheadervars 'starttext))
        (alttitle (assq-ref extractedheadervars 'alttitle))
@@ -292,12 +332,14 @@ headerToTOC = #(define-music-function (parser location header label) (ly:book? s
        (categories (assq-ref extractedheadervars 'categories))
        (authors (assq-ref extractedheadervars 'authors))
        (songnumber (assq-ref extractedheadervars 'songnumber))
+       (chapterref (assq-ref extractedheadervars 'chapterref))
        (textoptions (lambda (text alternative) `(((rawtext . ,text) (alternative . ,alternative) (songnumber . ,songnumber)))))
        (add-to-toc! (lambda (toctitle alternative)
                       (add-index-item! 'indexItemMarkup (textoptions toctitle alternative) toctitle label)))
        )
            (if categories (add-category-index-item! (string-tokenize categories) 'indexItemMarkup (textoptions (if categorytitle categorytitle title) #f) label))
            (if authors (add-author-index-item! (all-author-ids authors) 'indexItemMarkup (textoptions (if categorytitle categorytitle title) #f) label))
+           (if chapterref (add-chapter-index-item! chapterref 'indexItemMarkup (textoptions (if categorytitle categorytitle title) #f) label))
            (if starttext (add-to-toc! starttext #t))
            (if alttitle
                (if (list? alttitle)
@@ -308,6 +350,9 @@ headerToTOC = #(define-music-function (parser location header label) (ly:book? s
            (if title (add-to-toc! title #f) #{ #})
     ))
 
+headerToTOC = #(define-music-function (parser location header label) (ly:book? symbol?)
+  (header-module-to-toc! (ly:book-header header) label))
+
 
 %% https://github.com/NalaGinrut/guile-csv/blob/master/csv/csv.scm
 
@@ -353,11 +398,8 @@ headerToTOC = #(define-music-function (parser location header label) (ly:book? s
          (para-lines (map cleanup-whitespaces para-strings)))
     (string-join para-lines "\n")))
   (define (generate-toc-csv labelPageTable)
-    (let ((song-lines (map (lambda (song)
+    (define (song-line filename page-number headermodule)
-            (let* ((filename (symbol->string (car song)))
+            (let* ((extractedheadervars (extract-and-check-vars-from-module headermodule
-                   (songvars (cdr song))
-                   (page-number (number->string (assoc-get (assq-ref songvars 'label) labelPageTable)))
-                   (extractedheadervars (extract-and-check-vars-from-header (assq-ref songvars 'header)
                       '(title starttext alttitle categorytitle categories authors year_text year_melody year_translation year_composition year_adaption infotext translation pronunciation copyright source)))
                    (headervar-or-empty (lambda (varsym)
                      (let ((extracted (assq-ref extractedheadervars varsym)))
@@ -368,6 +410,7 @@ headerToTOC = #(define-music-function (parser location header label) (ly:book? s
                    (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))
+                   (refComposerIds (find-author-ids-by 'meloref authors))
                    (voiceComposerData (find-author-id-with-part-numbers 'voice authors))
                    (compositionIds (find-author-ids-by 'composition authors))
                    (adaptionTextIds (find-author-ids-by 'adaption_text authors))
@@ -389,7 +432,7 @@ headerToTOC = #(define-music-function (parser location header label) (ly:book? s
                   (headervar-or-empty 'categories)
                   (format-authors (append poetIds adaptionTextIds (map car versePoetData)))
                   (format-authors translatorIds)
-                  (format-authors (append composerIds compositionIds adaptionMusicIds bridgeIds interludeIds (map car voiceComposerData) (map car verseComposerData)))
+                  (format-authors (append composerIds compositionIds adaptionMusicIds bridgeIds interludeIds (map car voiceComposerData) (map car verseComposerData) refComposerIds))
                   (headervar-or-empty 'year_text)
                   (headervar-or-empty 'year_melody)
                   (headervar-or-empty 'year_translation)
@@ -402,7 +445,16 @@ headerToTOC = #(define-music-function (parser location header label) (ly:book? s
                   (format-info-paragraphs (headervar-or-empty 'translation))
                   (format-info-paragraphs (headervar-or-empty 'pronunciation))
               ))))
-            (alist-delete 'imagePage (alist-delete 'emptyPage song-list)))))
+    ;; Eingebettete Lieder (embedded_songs.ily) bekommen eigene Zeilen mit
+    ;; Dateiname und Seite des Hauptlieds.
+    (let ((song-lines (append-map (lambda (song)
+            (let* ((filename (symbol->string (car song)))
+                   (songvars (cdr song))
+                   (page-number (assoc-get (assq-ref songvars 'label) labelPageTable))
+                   (headermodule (ly:book-header (assq-ref songvars 'header))))
+              (map (lambda (module) (song-line filename page-number module))
+                   (cons headermodule (embedded-songs-of-header headermodule)))))
+            (alist-delete 'markupPage (alist-delete 'imagePage (alist-delete 'emptyPage song-list))))))
     (call-with-output-file "toc.csv"
       (lambda (port)
        (csv-write (cons '(
@@ -432,6 +484,6 @@ headerToTOC = #(define-music-function (parser location header label) (ly:book? s
   ; we use a delayed stencil to have all the page references available
   (ly:make-stencil
     `(delay-stencil-evaluation
-      ,(delay (let* ((table (ly:output-def-lookup layout 'label-page-table)))
+      ,(delay (let* ((table (ly:output-def-lookup layout 'label-page-string-table)))
         (generate-toc-csv (if (list? table) table '()))
         empty-stencil)))))

public_includes/layout_bottom.ily

@@ -1,8 +1,17 @@
-% set the speed of the midi music
-#(define midiQuarterNoteSpeed (if (defined? 'midiQuarterNoteSpeed) midiQuarterNoteSpeed 90))
-
 MUSIC = { \transposable #TRANSPOSITION \MUSIC }
 
+%% Eingebettete Lieder (siehe embedded_songs.ily) im Header des Hauptlieds
+%% vermerken, daraus bauen Footer, PDF-Lesezeichen und Verzeichnisse.
+#(if (and (pair? EMBEDDED_SONGS) (ly:book? HEADER) (ly:book-header HEADER))
+  (module-define! (ly:book-header HEADER) 'embeddedsongs EMBEDDED_SONGS))
+
+LAYOUT = \layout {
+  \LAYOUT
+  #(customized-layout LAYOUT)
+}
+
+#(customize-embedded-score-layouts! (list TEXT TEXT_PAGES))
+
 verselayout = \layout {
   \LAYOUT
   \context {
@@ -11,18 +20,12 @@ verselayout = \layout {
   }
 }
 
-LAYOUT = \layout {
-  \LAYOUT
-  #(let
-    ((custom-size (ly:output-def-lookup LAYOUT 'size #f)))
-    (if custom-size (layout-set-staff-size custom-size)))
-}
-
 TEXT = \markuplist {
   \override #`(transposition . ,TRANSPOSITION)
   \override #`(verselayout . ,verselayout)
   \override #`(verse-chords . ,#{ \chords { \verseChords } #})
   \override #`(verse-reference-voice . ,#{ \global \firstVoice  #})
+  \handle-tag-groups \recordedTagGroups
   \TEXT
 }
 
@@ -34,6 +37,7 @@ TEXT = \markuplist {
         \override #`(verselayout . ,verselayout)
         \override #`(verse-chords . ,#{ \chords { \verseChords } #})
         \override #`(verse-reference-voice . ,#{ \global \firstVoice  #})
+        \handle-tag-groups \recordedTagGroups
         #text
       }
     #})
@@ -44,6 +48,20 @@ TEXT = \markuplist {
     TEXT_PAGES
     (list TEXT))))
 
+%% Add invisible ChordPro write trigger to last TEXT_PAGES markuplist
+#(when (and (defined? 'chordpro-export-enabled) chordpro-export-enabled (pair? TEXT_PAGES))
+  (let* ((last-index (- (length TEXT_PAGES) 1))
+         (last-page (list-ref TEXT_PAGES last-index))
+         (modified-last-page #{
+           \markuplist {
+             #last-page
+             \chordpro-delayed-write
+           }
+         #}))
+    (set! TEXT_PAGES
+      (append (list-head TEXT_PAGES last-index)
+              (list modified-last-page)))))
+
 #(define (add-text-pages text-pages)
   (if (pair? text-pages)
     (begin
@@ -60,21 +78,41 @@ TEXT = \markuplist {
     (if header (set! $defaultheader header))
     (if paper (set! $defaultpaper paper))
   )
+
+  ;; ChordPro export: Store filename and extract metadata from basicSongInfo FIRST
+  (when (and (defined? 'chordpro-export-enabled) chordpro-export-enabled)
+    ;; Use ly:parser-output-name which returns the output basename
+    ;; This will write relative to current working directory (same as PDF)
+    (let ((output-name (ly:parser-output-name)))
+      (set! chordpro-current-filename output-name))
+
+    ;; Try to extract metadata from the HEADER (falls back to basicSongInfo)
+    (let ((header-module (if (and (ly:book? HEADER) (ly:book-header HEADER))
+                             (ly:book-header HEADER)
+                             (and (defined? 'basicSongInfo) basicSongInfo))))
+      (when header-module
+        (let* ((header-alist (ly:module->alist header-module))
+               (title (assoc-ref header-alist 'title))
+               (authors (assoc-ref header-alist 'authors)))
+          (when title
+            (set! chordpro-header-title
+                  (if (markup? title)
+                      (markup->string title)
+                      (if (string? title) title "Untitled"))))
+          (when authors
+            (set! chordpro-header-authors authors))))))
+
   (add-score #{
     \score {
       \MUSIC
       \layout { \LAYOUT }
     }#})
   (add-text-pages TEXT_PAGES)
+
   (add-score #{
     \score {
       \unfoldRepeats { \MUSIC \INLINESCOREMUSIC }
       \midi {
-        \context {
-          \Score
-          % Tempo des midi files
-          tempoWholesPerMinute = #(/ midiQuarterNoteSpeed 4)
-        }
         \context {
           \Staff
           \remove "Staff_performer"
@@ -85,4 +123,4 @@ TEXT = \markuplist {
         }
       }
     }#})
-))
+))

public_includes/pool_bottom.ily

@@ -4,4 +4,4 @@ HEADER = \bookpart {
     \basicSongInfo
   }
 }
-\include #(if noDefaultOutput "../private_includes/void.ily" "layout_bottom.ily")
+\include #(if noDefaultOutput "../private_includes/void.ily" "layout_bottom.ily")