new engraver for spacing in chordlyrics

private_includes/base/basic_format_and_style_settings.ily

@@ -134,18 +134,23 @@ override-stanza =
 #}
 )
 
+#(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
+        (number-formater
+          (if (eq? stanza-style 'roman)
+              (map roman-format stanzanumbers)
+              stanzanumbers)))))
+
 #(define (stanza . stanzanumbers)
 #{
   \once \override StanzaNumber.details.custom-realstanza = ##t % set this to signal that there is a real stanza and no repeat signs
   \applyContext
   #(lambda (context)
-    (let* ((stanzanumbers-override (ly:assoc-get 'custom-stanzanumber-override (ly:assoc-get 'details (ly:context-grob-definition context 'StanzaNumber) '()) #f))
+    (handle-stanza-numbers context stanzanumbers
-           (stanza-style (ly:assoc-get 'style (ly:context-grob-definition context 'StanzaNumber)))
+      (lambda (numbers) (string-join (map (lambda (n) (format #f stanzaFormat n)) numbers) ", "))))
-           (stanza-format (lambda (stanzanumber) (format #f (if (eq? stanza-style 'roman) romanStanzaFormat stanzaFormat) stanzanumber))))
-        (ly:context-set-property! context 'stanza
-          (string-join (map stanza-format
-                            (if stanzanumbers-override stanzanumbers-override stanzanumbers))
-                        ", "))))
 #}
 )
 
@@ -153,7 +158,14 @@ 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
-    \set stanza = #(make-on-the-fly-markup (lambda (layout props m) ((ly:output-def-lookup layout 'refMarkupFormatter) layout props stanzanumbers)) (make-null-markup))
+    \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)))))
     #lyrics
   }
 #}

private_includes/base/default_style.ily

@@ -16,7 +16,6 @@ songTocColumns = 3
 globalSize = 15
 lyricSize = 1.6
 stanzaFormat = "~a."
-romanStanzaFormat = "~@r."
 refString = "Ref.:"
 refStringWithNumbers = "Ref. ~a:"
 % hübsche Wiederholungszeichen für den Liedtext

private_includes/base/verses_with_chords.ily

@@ -253,6 +253,100 @@
                                     (make-pad-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)
+         (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
+      (listeners
+       ((multi-measure-rest-event engraver event)
+        (set! have-a-rest #t)
+        )
+       ((rest-event engraver event)
+        (set! have-a-rest #t)
+        )
+       ((lyric-event engraver event)
+        (set! have-a-rest #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)
+        ))
+      (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! 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! 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 #{#})
@@ -293,9 +387,11 @@
             \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
               \remove Bar_number_engraver
               \remove Mark_engraver
               \remove Jump_engraver
@@ -325,14 +421,6 @@
               \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)
-            }
           }
         }
       }