engraver-init.ly: guarantee no ledger lines in NullVoice

[lilypond.git] / ly / engraver-init.ly

diff --git a/ly/engraver-init.ly b/ly/engraver-init.ly
index 1842de28a2f5b54598709a91ae11a28cf41d4a76..6421d9efa1f3fa2aa990743062a3dbb1a5c13521 100644 (file)
--- a/ly/engraver-init.ly
+++ b/ly/engraver-init.ly
@@ -147,9 +147,11 @@
   \accepts "ChoirStaff"
   \accepts "ChordNames"
   \accepts "DrumStaff"
+  \accepts "Dynamics"
   \accepts "FiguredBass"
   \accepts "GrandStaff"
   \accepts "Lyrics"
+  \accepts "OneStaff"
   \accepts "PianoStaff"
   \accepts "RhythmicStaff"
   \accepts "Staff"
@@ -385,6 +387,7 @@ together, never separately."
   \accepts "FretBoards"
   \accepts "GrandStaff"
   \accepts "Lyrics"
+  \accepts "OneStaff"
   \accepts "PianoStaff"
   \accepts "RhythmicStaff"
   \accepts "Staff"
@@ -397,6 +400,35 @@ staves are connected vertically.  @code{StaffGroup} only consists of
 a collection of staves, with a bracket in front and spanning bar lines."
 }
 
+\context {
+  \type "Engraver_group"
+  \name "OneStaff"
+  \accepts "ChordNames"
+  \accepts "DrumStaff"
+  \accepts "Dynamics"
+  \accepts "FiguredBass"
+  \accepts "FretBoards"
+  \accepts "GregorianTranscriptionStaff"
+  \accepts "KievanStaff"
+  \accepts "Lyrics"
+  \accepts "MensuralStaff"
+  \accepts "NoteNames"
+  \accepts "PetrucciStaff"
+  \accepts "RhythmicStaff"
+  \accepts "Staff"
+  \accepts "TabStaff"
+  \accepts "VaticanaStaff"
+  \defaultchild "Staff"
+  \consists "Axis_group_engraver"
+
+  \description "Provides a common axis for the contained staves,
+making all of them appear in the same vertical space.  This can be
+useful for typesetting staves of different types in immediate succession
+or for temporarily changing the character of one staff or overlaying
+it with a different one.  Often used with @code{\\stopStaff} and
+@code{\\startStaff} for best results."
+}
+
 \context {
   \type "Engraver_group"
   \name "Dynamics"
@@ -580,6 +612,7 @@ automatically when an output definition (a @code{\\score} or
   \accepts "Lyrics"
   \accepts "MensuralStaff"
   \accepts "NoteNames"
+  \accepts "OneStaff"
   \accepts "PetrucciStaff"
   \accepts "PianoStaff"
   \accepts "RhythmicStaff"
@@ -795,6 +828,10 @@ context."
   \consists "Pitch_squash_engraver"
   squashedPosition = 0
 
+  %% generate no ledger lines, needed for staves with custom
+  %% line positions and ledger lines that appear inside the staff
+  \override NoteHead.no-ledgers = ##t
+
   %% the engravers that control the 'busy' flags for note-onsets and melismata
   \consists "Grob_pq_engraver"
   \consists "Tie_engraver"