use lilypond 2.27 and be compatibel to 2.26

private_includes/base/all.ily

@@ -33,9 +33,11 @@
 #(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"
@@ -54,6 +56,7 @@ HEADER = {}
 MUSIC = {}
 TEXT = \markuplist {}
 TEXT_PAGES = #f
+EMBEDDED_SONGS = #'()
 
 verseChords = {}
 firstVoice = {}

private_includes/base/basic_format_and_style_settings.ily

@@ -58,6 +58,7 @@ generalLayout = \layout {
     \RemoveEmptyStaves
     \override VerticalAxisGroup.remove-first = ##t
     \numericTimeSignature
+    rehearsalMarkFormatter = #format-mark-box-alphabet
     \overrideTimeSignatureSettings
       4/4               % timeSignatureFraction
       1/4               % baseMomentFraction
@@ -90,6 +91,22 @@ generalLayout = \layout {
      ((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:
 
@@ -138,50 +155,83 @@ 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 (handle-stanza-numbers context numbers number-formater)
-  (let* ((stanzanumbers (ly:assoc-get 'custom-stanzanumber-override (ly:assoc-get 'details (ly:context-grob-definition context 'StanzaNumber) '()) numbers))
-         (stanza-style (ly:assoc-get 'style (ly:context-grob-definition context 'StanzaNumber)))
-         (roman-format (lambda (stanzanumber) (format #f "~@r" stanzanumber))))
-      (ly:context-set-property! context 'stanza
-        (make-pad-left-markup 1
-          (number-formater
-            (if (eq? stanza-style 'roman)
-                (map roman-format stanzanumbers)
-                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 (stanza . stanzanumbers)
+#(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
-  \once \override StanzaNumber.details.custom-stanza-type = #'verse
+  \once \override StanzaNumber.details.custom-stanza-type = #type
   \once \override StanzaNumber.details.custom-stanza-numbers = #stanzanumbers
-  \applyContext
-  #(lambda (context)
-    (handle-stanza-numbers context stanzanumbers
-      (lambda (numbers) (string-join (map (lambda (n) (format #f stanzaFormat n)) numbers) ", "))))
-#}
-)
+  \stanza \markup \formatted-stanza
+#})
+
+% \fstanza 1      -> "1."
+% \fstanza 1,4    -> "1., 4." (nur im Notenmodus, z.B. \chordverse { \fstanza 1,4 } ...)
+% \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
-    \once \override StanzaNumber.details.custom-stanza-type = #'ref
-    \once \override StanzaNumber.details.custom-stanza-numbers = #stanzanumbers
-    \applyContext
-    #(lambda (context)
-      (handle-stanza-numbers context stanzanumbers
-        (lambda (numbers)
-          (make-on-the-fly-markup
-            (lambda (layout props m)
-              ((ly:output-def-lookup layout 'refMarkupFormatter) layout props numbers))
-            (make-null-markup)))))
+    #(formatted-stanza-music 'ref stanzanumbers)
     #lyrics
   }
 #}
@@ -190,43 +240,24 @@ ref =
 bridge =
 #(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
-    \once \override StanzaNumber.details.custom-stanza-type = #'bridge
-    \once \override StanzaNumber.details.custom-stanza-numbers = #stanzanumbers
-    \applyContext
-    #(lambda (context)
-      (handle-stanza-numbers context stanzanumbers
-        (lambda (numbers)
-          (make-on-the-fly-markup
-            (lambda (layout props m)
-              ((ly:output-def-lookup layout 'bridgeMarkupFormatter) layout props numbers))
-            (make-null-markup)))))
+    #(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.
 % Sets custom-inline-text for ChordPro export so it can collect the repeat sign separately
-repStartWithTag = \lyricmode {
+repStartWithTag =
+#(define-music-function () ()
+#{ \lyricmode {
   \tag #'repeats {
     \once \override StanzaNumber.details.custom-inline-text = \repStart
     \once \override StanzaNumber.details.custom-inline-direction = #LEFT
-    \applyContext
-    #(lambda (context)
-      (let ((lastStanza (ly:context-property context '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
-  }
+    \stanza \markup \formatted-stanza
   }
+} #})
 
 repStopWithTag = \lyricmode {
   \tag #'repeats {
@@ -234,19 +265,19 @@ repStopWithTag = \lyricmode {
     \once \override StanzaNumber.details.custom-inline-direction = #RIGHT
     \once \override StanzaNumber.font-series = #'normal
     \once \override StanzaNumber.direction = 1
-    \set stanza = \markup { \pad-x-right #1 \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 =
@@ -312,7 +343,7 @@ rufWithMarkup =
      \lyricmode {
        \once \override StanzaNumber.font-series = #'normal
        \once \override StanzaNumber.direction = 1
-       \set stanza = #text
+       \stanza #text
      }
    #})
 ruf =

private_includes/base/chord_settings.ily

@@ -155,7 +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.

private_includes/base/chordpro.ily

@@ -319,14 +319,21 @@
                  ;; Use context property if available, otherwise grob property
                  (stanza-markup (or stanza-text-from-context stanza-text-from-grob))
                  ;; For ref/bridge, always use format-chordpro-stanza-label
-                 ;; For verse, extract from markup (includes roman numerals if \romanStanza was used)
-                 (stanza-text (if (or (eq? stanza-type 'ref) (eq? stanza-type 'bridge))
-                                 (format-chordpro-stanza-label stanza-type stanza-numbers)
+                 ;; For verses set by \fstanza, format the numbers (roman numerals if \romanStanza was used)
+                 ;; Otherwise, extract from markup
+                 (stanza-text (cond
+                               ((or (eq? stanza-type 'ref) (eq? stanza-type 'bridge))
+                                 (format-chordpro-stanza-label stanza-type stanza-numbers))
+                               (custom-realstanza
+                                 (format-stanza-numbers
+                                   (ly:assoc-get 'custom-stanzanumber-override details stanza-numbers)
+                                   (ly:grob-property grob 'style #f)))
+                               (else
                                  (if (markup? stanza-markup)
                                      (markup->string stanza-markup)
                                      (if stanza-markup
                                          (format #f "~a" stanza-markup)
-                                         #f))))
+                                         #f)))))
                  (existing (assoc this-verse-index chordpro-stanza-numbers))
                  (moment (ly:context-current-moment (ly:translator-context source-engraver)))
                  (direction (ly:grob-property grob 'direction CENTER)))

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/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/footer_with_songinfo.ily

@@ -33,7 +33,8 @@
 #(define (join-present items joiner)
   (string-join (filter (lambda (item) (and (string? item) (not (string-null? (string-trim-both item))))) items) joiner))
 
-#(define-markup-command (print-songinfo layout props) ()
+% 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
@@ -131,7 +132,6 @@
   )
 
   (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))
@@ -167,10 +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

private_includes/base/title_with_category_images.ily

@@ -65,10 +65,11 @@
        ;; Ist dieses Lied das erste eines Kapitels, wird der Kapitel-Eintrag
        ;; unmittelbar vor dem Lied-Eintrag ausgegeben, damit die pdfmark-/OUT-
        ;; Reihenfolge (Elternteil vor Kindern) im PDF-Stream garantiert stimmt.
+       ;; 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 title-markup)
-         (markup #:title-to-pdf-toc pdfbookmark title-markup))
+                 #: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)
      )))
 

private_includes/base/verses_with_chords.ily

@@ -89,7 +89,7 @@
      (if (and (string? arg) (string-null? arg))
          " "
          #{\markup
-           \score { \new Lyrics { \lyricmode { #(if (ly:music? arg) arg #{ \set stanza = #arg #}) "" } } \layout { $verselayout #(customized-layout verselayout) } }
+           \score { \new Lyrics { \lyricmode { #(if (ly:music? arg) arg #{ \stanza #arg #}) "" } } \layout { $verselayout #(customized-layout verselayout) } }
          #}
      )))
 
@@ -249,6 +249,13 @@ Chord_lyrics_spacing_engraver =
          (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))))
@@ -256,6 +263,25 @@ Chord_lyrics_spacing_engraver =
               (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)
@@ -263,8 +289,19 @@ Chord_lyrics_spacing_engraver =
        ((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)
@@ -274,6 +311,7 @@ Chord_lyrics_spacing_engraver =
         (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)
@@ -294,6 +332,7 @@ Chord_lyrics_spacing_engraver =
                     (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)
@@ -321,6 +360,9 @@ Chord_lyrics_spacing_engraver =
                                              (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)
               )

private_includes/book/book_include.ily

@@ -187,20 +187,24 @@ songs =
         ;; 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.
-        (emits-bookmark?
+        ;; Eingebettete Lieder (embedded_songs.ily) haben jeweils ein eigenes
+        ;; Lesezeichen, daher die Anzahl statt eines Booleans.
+        (bookmark-count
           (lambda (e)
-            (and (not (eq? (car e) 'emptyPage))
-                 (not (eq? (car e) 'imagePage))
-                 (not (eq? (car e) 'markupPage))
-                 (let ((vars (extract-and-check-vars-from-header
-                               (assq-ref (cdr e) 'header) '(title starttext))))
-                   (if (or (assq-ref vars 'title) (assq-ref vars 'starttext)) #t #f)))))
+            (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) (if (emits-bookmark? (car l)) (+ c 1) 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.
@@ -300,12 +304,23 @@ songs =
                    (music (assq-ref songvars 'music))
                    (layout (assq-ref songvars 'layout))
                    (text-pages (assq-ref songvars 'text-pages))
-                   (label (assq-ref songvars 'label)))
+                   (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 songfilename = $(symbol->string filename) } }
                 $(add-text-pages text-pages)
               }

private_includes/book/toc_include.ily

@@ -304,16 +304,9 @@ indexSection =
    (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-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)))
+  (extract-and-check-vars-from-module (ly:book-header bookheader) 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))
@@ -331,7 +324,7 @@ headerToTOC = #(define-music-function (parser location header label) (ly:book? s
     ))
     (let*
       (
-       (extractedheadervars (extract-and-check-vars-from-header header '(title starttext alttitle categorytitle categories authors songnumber chapterref)))
+       (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))
@@ -357,6 +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
 
@@ -402,11 +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)
-            (let* ((filename (symbol->string (car song)))
-                   (songvars (cdr song))
-                   (page-number (assoc-get (assq-ref songvars 'label) labelPageTable))
-                   (extractedheadervars (extract-and-check-vars-from-header (assq-ref songvars 'header)
+    (define (song-line filename page-number headermodule)
+            (let* ((extractedheadervars (extract-and-check-vars-from-module headermodule
                       '(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)))
@@ -452,6 +445,15 @@ 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))
               ))))
+    ;; 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)

public_includes/layout_bottom.ily

@@ -1,10 +1,17 @@
 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 {
@@ -79,9 +86,12 @@ TEXT = \markuplist {
     (let ((output-name (ly:parser-output-name)))
       (set! chordpro-current-filename output-name))
 
-    ;; Try to extract metadata from basicSongInfo \header block
-    (when (defined? 'basicSongInfo)
-      (let* ((header-alist (ly:module->alist basicSongInfo))
+    ;; 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
@@ -90,7 +100,7 @@ TEXT = \markuplist {
                       (markup->string title)
                       (if (string? title) title "Untitled"))))
           (when authors
-          (set! chordpro-header-authors authors)))))
+            (set! chordpro-header-authors authors))))))
 
   (add-score #{
     \score {