* lily/accidental-placement.cc (split_accidentals): new function

[lilypond.git] / scm / grob-description.scm

diff --git a/scm/grob-description.scm b/scm/grob-description.scm
index 439dae00c50d1874b340af321d4fc1ad9664f6f8..3782c1347231f8941e64b4bab54e7fa1042ca958 100644 (file)
--- a/scm/grob-description.scm
+++ b/scm/grob-description.scm
@@ -18,14 +18,14 @@
        (molecule-callback . ,Accidental_interface::brew_molecule)
        (font-family . music)
        (cautionary-style . smaller)
-       (after-line-breaking-callback . ,Accidental_interface::after_line_breaking)             (meta . ((interfaces . (accidental-interface font-interface))))
+       (after-line-breaking-callback . ,Accidental_interface::after_line_breaking)             (meta . ((interfaces . (item-interface accidental-interface font-interface))))
        ))
     (AccidentalPlacement
      . (
-       (X-extent-callback . ,Accidental_placement::extent_callback)
+       (X-extent-callback . ,Axis_group_interface::group_extent_callback)
        (left-padding . 0.3)
        (right-padding . 0.3)
-       (meta . ((interfaces . (accidental-placement-interface))))
+       (meta . ((interfaces . (item-interface accidental-placement-interface))))
        ))
 
     (Ambitus
@@ -44,7 +44,7 @@
                       (time-signature . (extra-space . 0.0)) 
                       (first-note . (extra-space . 0.0))
                       ))
-       (meta . ((interfaces . (ambitus-interface staff-symbol-referencer-interface break-aligned-interface font-interface))))
+       (meta . ((interfaces . (ambitus-interface staff-symbol-referencer-interface break-aligned-interface item-interface  font-interface))))
        ))
 
     (Arpeggio
@@ -56,7 +56,7 @@
        (X-offset-callbacks . (,Side_position_interface::aligned_side))
        (direction . -1)
        (staff-position . 0.0)
-       (meta . ((interfaces . (arpeggio-interface staff-symbol-referencer-interface side-position-interface font-interface))))
+       (meta . ((interfaces . (arpeggio-interface staff-symbol-referencer-interface side-position-interface item-interface font-interface))))
        ))
 
     (BarLine
@@ -83,7 +83,7 @@
        (thin-kern . 3.0)
        (hair-thickness . 1.6)
        (thick-thickness . 6.0)
-       (meta . ((interfaces . (bar-line-interface  break-aligned-interface font-interface))))
+       (meta . ((interfaces . (bar-line-interface item-interface   break-aligned-interface font-interface))))
        ))
 
     
@@ -104,7 +104,7 @@
              ((interfaces . (side-position-interface
                              text-interface
                              self-alignment-interface
-                             font-interface break-aligned-interface))))
+                             font-interface item-interface  break-aligned-interface))))
 
             ))
 
@@ -118,7 +118,7 @@
        (padding . 0.1)
        (kern . 0.2)
        (thickness . 1.0)
-       (meta . ((interfaces . (text-interface bass-figure-interface self-alignment-interface font-interface))))
+       (meta . ((interfaces . (text-interface bass-figure-interface item-interface self-alignment-interface font-interface))))
        ))
     (Beam
      . (
@@ -149,7 +149,7 @@
        (auto-knee-gap . 7)
        (font-name . "cmr10")
        (space-function . ,Beam::space_function)
-       (meta . ((interfaces . (staff-symbol-referencer-interface beam-interface))))
+       (meta . ((interfaces . (staff-symbol-referencer-interface beam-interface spanner-interface))))
        ))
 
     (BreakAlignment
@@ -158,7 +158,7 @@
        (stacking-dir . 1)
        (axes . (0))
        (X-extent-callback . ,Axis_group_interface::group_extent_callback)
-       (meta . ((interfaces . (break-alignment-interface axis-group-interface)))))
+       (meta . ((interfaces . (break-alignment-interface item-interface axis-group-interface)))))
        )
 
     (BreakAlignGroup
@@ -166,7 +166,7 @@
        (axes  . (0))
        (X-offset-callbacks . (,Break_align_interface::alignment_callback))
        (X-extent-callback . ,Axis_group_interface::group_extent_callback)
-       (meta . ((interfaces . (break-aligned-interface axis-group-interface))))
+       (meta . ((interfaces . (break-aligned-interface item-interface axis-group-interface item-interface ))))
        ))
 
     (BreathingSign
@@ -186,7 +186,7 @@
        (text . "scripts-rcomma")
        (Y-offset-callbacks . (,Breathing_sign::offset_callback))
        (break-visibility . ,begin-of-line-invisible)
-       (meta . ((interfaces . (break-aligned-interface breathing-sign-interface text-interface font-interface))))
+       (meta . ((interfaces . (break-aligned-interface breathing-sign-interface text-interface font-interface item-interface ))))
        ))
 
     (Clef
@@ -206,7 +206,7 @@
                        (next-note . (extra-space . 0.5))                       
                        ))
        (Y-offset-callbacks  . (,Staff_symbol_referencer::callback)) 
-       (meta . ((interfaces . (clef-interface staff-symbol-referencer-interface font-interface break-aligned-interface))))
+       (meta . ((interfaces . (clef-interface staff-symbol-referencer-interface font-interface break-aligned-interface item-interface ))))
        ))
 
     (ChordName
@@ -215,7 +215,7 @@
        (after-line-breaking-callback . ,Chord_name::after_line_breaking)
        (chord-name-function . ,default-chord-name-function)
        (font-family . roman)
-       (meta . ((interfaces . (font-interface text-interface chord-name-interface))))
+       (meta . ((interfaces . (font-interface text-interface chord-name-interface item-interface ))))
        ))
 
     (Custos
@@ -233,7 +233,7 @@
        (space-alist . (
                        (first-note . (minimum-space . 0.0))
                        ))
-       (meta . ((interfaces . (custos-interface staff-symbol-referencer-interface break-aligned-interface))))
+       (meta . ((interfaces . (custos-interface staff-symbol-referencer-interface break-aligned-interface item-interface ))))
        ))
 
 
@@ -243,7 +243,7 @@
        (direction . 1)
        (X-extent-callback . ,Axis_group_interface::group_extent_callback)
        (X-offset-callbacks . (,Dot_column::side_position))
-       (meta . ((interfaces . (dot-column-interface axis-group-interface))))
+       (meta . ((interfaces . (dot-column-interface axis-group-interface item-interface ))))
        ))
 
     (Dots
@@ -251,7 +251,7 @@
        (molecule-callback . ,Dots::brew_molecule)
        (dot-count . 1)
        (Y-offset-callbacks  . (,Dots::quantised_position_callback ,Staff_symbol_referencer::callback))
-       (meta . ((interfaces . (font-interface staff-symbol-referencer-interface dots-interface))))
+       (meta . ((interfaces . (font-interface staff-symbol-referencer-interface dots-interface item-interface ))))
        ))
 
     (DoublePercentRepeat .
@@ -266,7 +266,7 @@
                          (break-visibility . ,begin-of-line-invisible)
                          (meta . ((interfaces . (font-interface
                                                  break-aligned-interface
-                                                 percent-repeat-interface))))
+                                                 percent-repeat-interface item-interface ))))
                         ))
 
     (DynamicText
@@ -282,7 +282,7 @@
        (font-family . dynamic)
        (font-shape . italic)
        (self-alignment-Y . 0)
-       (meta . ((interfaces . (font-interface text-interface self-alignment-interface  dynamic-interface))))
+       (meta . ((interfaces . (font-interface text-interface self-alignment-interface  dynamic-interface item-interface ))))
        ))
 
     (DynamicLineSpanner
@@ -293,7 +293,7 @@
        (padding . 0.6)
        (minimum-space . 1.2)
        (direction . -1)
-       (meta . ((interfaces . (dynamic-interface axis-group-interface side-position-interface))))
+       (meta . ((interfaces . (dynamic-interface axis-group-interface side-position-interface spanner-interface))))
        ))
 
     (LeftEdge
@@ -311,7 +311,7 @@
                        (first-note . (extra-space . 0.0))
                        (key-signature . (extra-space . 0.0))
                        ))
-       (meta . ((interfaces . (break-aligned-interface))))
+       (meta . ((interfaces . (break-aligned-interface item-interface ))))
        ))
 
     (Fingering
@@ -327,7 +327,7 @@
        (font-family . number)
        (font-relative-size . -3)
        (font-shape . upright)
-       (meta . ((interfaces . (finger-interface font-interface text-script-interface text-interface side-position-interface self-alignment-interface))))
+       (meta . ((interfaces . (finger-interface font-interface text-script-interface text-interface side-position-interface self-alignment-interface item-interface ))))
        ))
 
 
@@ -336,7 +336,7 @@
        (Y-offset-callbacks . (,Hara_kiri_group_spanner::force_hara_kiri_callback))
        (Y-extent-callback . ,Hara_kiri_group_spanner::y_extent)
        (axes . (1))
-       (meta . ((interfaces . (axis-group-interface hara-kiri-group-interface))))
+       (meta . ((interfaces . (axis-group-interface hara-kiri-group-interface item-interface  spanner-interface))))
        ))
 
     (Hairpin
@@ -353,7 +353,7 @@
        (dash-length . 4.0)
        (self-alignment-Y . 0)
        (Y-offset-callbacks . (,Self_alignment_interface::aligned_on_self))
-       (meta . ((interfaces . (hairpin-interface self-alignment-interface dynamic-interface))))
+       (meta . ((interfaces . (hairpin-interface self-alignment-interface dynamic-interface spanner-interface))))
        ))
 
     (InstrumentName
@@ -373,7 +373,7 @@
        (break-visibility . ,begin-of-line-visible)
        (baseline-skip . 2)
        (font-family . roman)
-       (meta . ((interfaces . (font-interface self-alignment-interface side-position-interface text-interface break-aligned-interface))))
+       (meta . ((interfaces . (font-interface self-alignment-interface side-position-interface text-interface break-aligned-interface item-interface ))))
        ))
 
     (KeySignature
@@ -388,7 +388,7 @@
        (break-align-symbol . key-signature)
        (break-visibility . ,begin-of-line-visible)
        (breakable . #t)
-       (meta . ((interfaces . (key-signature-interface  font-interface  break-aligned-interface))))
+       (meta . ((interfaces . (key-signature-interface  font-interface  break-aligned-interface item-interface ))))
        ))
 
     (Ligature
@@ -403,7 +403,7 @@
        (height . 0.5)
        (ligature-primitive-callback . ,Note_head::brew_molecule)
        (molecule-callback . ,Ligature_bracket::brew_molecule)
-       (meta . ((interfaces . (ligature-bracket-interface))))
+       (meta . ((interfaces . (ligature-bracket-interface spanner-interface))))
        ))
 
     (LigatureHead
@@ -425,7 +425,7 @@
        (maximum-length .  100)
        (molecule-callback . ,Hyphen_spanner::brew_molecule)
        (Y-extent-callback . ,Grob::point_dimension_callback)
-       (meta . ((interfaces . (lyric-hyphen-interface))))
+       (meta . ((interfaces . (lyric-hyphen-interface spanner-interface))))
        ))
 
     (LyricExtender
@@ -434,7 +434,7 @@
        (height . 0.8) ; stafflinethickness;
        (right-trim-amount . 0.5)
        (Y-extent-callback . ,Grob::point_dimension_callback)
-       (meta . ((interfaces . (lyric-extender-interface))))
+       (meta . ((interfaces . (lyric-extender-interface spanner-interface))))
        ))
 
     (LyricText
@@ -449,7 +449,7 @@
        (font-family . roman)
        (font-shape . upright)
        ;; duh, side-position-interface?
-       (meta . ((interfaces . (lyric-syllable-interface self-alignment-interface text-interface font-interface))))
+       (meta . ((interfaces . (lyric-syllable-interface self-alignment-interface text-interface font-interface item-interface ))))
        ))
 
     (MensuralLigature
@@ -487,7 +487,7 @@
        (font-family . roman)
        (break-visibility . ,end-of-line-invisible)
        (padding . 0.8)
-       (meta . ((interfaces . (text-interface side-position-interface font-interface mark-interface self-alignment-interface))))
+       (meta . ((interfaces . (text-interface side-position-interface font-interface mark-interface self-alignment-interface item-interface ))))
        ))
 
     (MultiMeasureRest
@@ -502,7 +502,7 @@
        (thickness . 6.6)
        (font-family . number)
        (padding . 1)
-       (meta . ((interfaces . (multi-measure-rest-interface rest-interface font-interface staff-symbol-referencer-interface))))
+       (meta . ((interfaces . (multi-measure-rest-interface rest-interface font-interface staff-symbol-referencer-interface spanner-interface))))
        ))
 
     (NoteCollision
@@ -512,7 +512,7 @@
        (note-width . 1.321)
        (X-extent-callback . ,Axis_group_interface::group_extent_callback)
        (Y-extent-callback . ,Axis_group_interface::group_extent_callback)      
-       (meta . ((interfaces . (note-collision-interface axis-group-interface))))
+       (meta . ((interfaces . (note-collision-interface axis-group-interface item-interface ))))
        ))
 
     (NoteColumn
@@ -520,7 +520,7 @@
        (axes . (0 1))
        (X-extent-callback . ,Axis_group_interface::group_extent_callback)
        (Y-extent-callback . ,Axis_group_interface::group_extent_callback)      
-       (meta . ((interfaces . (axis-group-interface note-column-interface))))
+       (meta . ((interfaces . (axis-group-interface note-column-interface item-interface ))))
        ))
 
     (NoteHead
@@ -529,7 +529,7 @@
        (molecule-callback . ,Note_head::brew_molecule)
        (Y-offset-callbacks  . (,Staff_symbol_referencer::callback))
        (stem-attachment-function . ,note-head-style->attachment-coordinates)
-       (meta . ((interfaces . (rhythmic-head-interface font-interface note-head-interface staff-symbol-referencer-interface))))
+       (meta . ((interfaces . (rhythmic-head-interface font-interface note-head-interface staff-symbol-referencer-interface item-interface ))))
        ))
 
     (Glissando
@@ -540,7 +540,7 @@
        (X-extent-callback . #f)
        (Y-extent-callback . #f)                         
        (molecule-callback . ,Line_spanner::brew_molecule)
-       (meta . ((interfaces . (line-spanner-interface))))
+       (meta . ((interfaces . (line-spanner-interface spanner-interface))))
        ))
 
     (VoiceFollower
@@ -551,14 +551,14 @@
        (X-extent-callback . #f)
        (Y-extent-callback . #f)                         
        (molecule-callback . ,Line_spanner::brew_molecule)
-       (meta . ((interfaces . (line-spanner-interface))))
+       (meta . ((interfaces . (line-spanner-interface spanner-interface))))
        ))
 
     (NoteName
      . (
        (molecule-callback . ,Text_item::brew_molecule)
        (font-family . roman)
-       (meta . ((interfaces . (note-name-interface text-interface font-interface))))
+       (meta . ((interfaces . (note-name-interface text-interface font-interface item-interface ))))
        ))
 
     (OctavateEight
@@ -570,17 +570,20 @@
        (Y-offset-callbacks . (,Side_position_interface::aligned_side))
        (molecule-callback . ,Text_item::brew_molecule)
        (font-shape . italic)
+       (padding . 0.4)
+       (font-relative-size . -2)
        (font-family . roman)
-       (meta . ((interfaces . (text-interface self-alignment-interface side-position-interface font-interface))))
+       (meta . ((interfaces . (text-interface self-alignment-interface side-position-interface font-interface item-interface ))))
        ))
 
     (PaperColumn
      . (
        (axes . (0))
+       (before-line-breaking-callback . ,Paper_column::before_line_breaking)
        (X-extent-callback . ,Axis_group_interface::group_extent_callback)
 
 ;              (molecule-callback . ,Paper_column::brew_molecule) (font-name . "cmr8") (Y-extent-callback . #f)
-       (meta . ((interfaces . (paper-column-interface axis-group-interface spaceable-grob-interface))))
+       (meta . ((interfaces . (paper-column-interface axis-group-interface spaceable-grob-interface item-interface ))))
        ))
 
     (PhrasingSlur
@@ -603,19 +606,19 @@
        (attachment . (#f . #f))
        (attachment-offset . ((0 . 0) . (0 . 0)))
        (slope-limit . 0.8)
-       (meta . ((interfaces . (slur-interface))))
+       (meta . ((interfaces . (slur-interface spanner-interface))))
        ))
 
     (NonMusicalPaperColumn
      . (
        (axes . (0))
        (X-extent-callback . ,Axis_group_interface::group_extent_callback)
-
+       (before-line-breaking-callback . ,Paper_column::before_line_breaking)
        ;; debugging stuff: print column number.
 ;      (molecule-callback . ,Paper_column::brew_molecule) (font-name . "cmr8") (Y-extent-callback . #f)
 
 
-       (meta .  ((interfaces . (paper-column-interface axis-group-interface spaceable-grob-interface))))
+       (meta .  ((interfaces . (paper-column-interface axis-group-interface spaceable-grob-interface item-interface ))))
        ))
 
     (PercentRepeat
@@ -626,7 +629,7 @@
        (thickness . 0.48)
        (minimum-width . 12.5) ; staffspace
        (font-family . music)
-       (meta . ((interfaces . (multi-measure-rest-interface  font-interface percent-repeat-interface))))
+       (meta . ((interfaces . (multi-measure-rest-interface  spanner-interface font-interface percent-repeat-interface))))
        ))
 
     (PianoPedalBracket   ;; an example of a text spanner
@@ -642,7 +645,7 @@
        (edge-height . (1.0 . 1.0))
        (shorten-pair . (0.0 . 0.0))
        (thickness .  1.0)
-       (meta . ((interfaces . (text-spanner-interface piano-pedal-interface))))
+       (meta . ((interfaces . (text-spanner-interface piano-pedal-interface spanner-interface))))
        ))
 
     (RepeatSlash
@@ -650,7 +653,7 @@
        (molecule-callback . , Percent_repeat_item_interface::beat_slash)
        (thickness . 0.48)
        (slope . 1.7)
-       (meta . ((interfaces . (percent-repeat-interface))))
+       (meta . ((interfaces . (percent-repeat-interface item-interface ))))
        ))
     (Rest
      . (
@@ -664,13 +667,13 @@
                 (interfaces . (font-interface
                                rhythmic-head-interface
                                staff-symbol-referencer-interface
-                               rest-interface))
+                               rest-interface item-interface ))
                ))))
 
     (RestCollision
      . (
        (minimum-distance . 0.75)
-       (meta . ((interfaces . (rest-collision-interface))))
+       (meta . ((interfaces . (rest-collision-interface item-interface ))))
        ))
 
     (Script
@@ -685,13 +688,13 @@
        (X-offset-callbacks . (,Self_alignment_interface::centered_on_parent))
        (before-line-breaking-callback . ,Script_interface::before_line_breaking)
        (font-family . music)
-       (meta . ((interfaces . (script-interface side-position-interface font-interface))))
+       (meta . ((interfaces . (script-interface side-position-interface font-interface item-interface ))))
        ))
 
     (ScriptColumn
      . (
        (before-line-breaking-callback . ,Script_column::before_line_breaking)
-       (meta . ((interfaces . (script-column-interface))))
+       (meta . ((interfaces . (script-column-interface item-interface ))))
        ))
 
     (Slur
@@ -714,7 +717,7 @@
        (attachment . (#f . #f))
        (attachment-offset . ((0 . 0) . (0 . 0)))
        (slope-limit . 0.8)
-       (meta . ((interfaces . (slur-interface))))
+       (meta . ((interfaces . (slur-interface spanner-interface))))
        ))
 
     (SpacingSpanner
@@ -724,7 +727,7 @@
        (shortest-duration-space . 2.0)
        (spacing-increment . 1.2)
        (base-shortest-duration . ,(make-moment 1 8))
-       (meta . ((interfaces . (spacing-interface spacing-spanner-interface))))
+       (meta . ((interfaces . (spacing-interface spacing-spanner-interface spanner-interface))))
        ))
 
     (SpanBar
@@ -747,7 +750,7 @@
        (thin-kern . 3.0)
        (hair-thickness . 1.6)
        (thick-thickness . 6.0)
-       (meta . ((interfaces . (span-bar-interface bar-line-interface))))
+       (meta . ((interfaces . (span-bar-interface bar-line-interface item-interface ))))
        ))
 
     (StanzaNumber
@@ -757,28 +760,27 @@
        (break-align-symbol . clef)
        (break-visibility . ,begin-of-line-visible)
        (font-family . roman)
-       (meta . ((interfaces . (break-aligned-interface text-interface font-interface))))               
+       (meta . ((interfaces . (break-aligned-interface text-interface font-interface item-interface ))))               
        ))
 
     (StaffSpacing
      . (
        (breakable . #t)
        (stem-spacing-correction . 0.4)
-       (meta . ((interfaces . (spacing-interface staff-spacing-interface))))
+       (meta . ((interfaces . (spacing-interface staff-spacing-interface item-interface ))))
        ))
     (NoteSpacing
      . (
        (stem-spacing-correction . 0.5)
-       (meta . ((interfaces . (spacing-interface note-spacing-interface))))
+       (meta . ((interfaces . (spacing-interface note-spacing-interface item-interface ))))
        ))
 
     (StaffSymbol
      . (
        (molecule-callback . ,Staff_symbol::brew_molecule)
        (line-count . 5)
-       (ragged-right . #f)
        (layer . 0)
-       (meta . ((interfaces . (staff-symbol-interface))))
+       (meta . ((interfaces . (staff-symbol-interface spanner-interface))))
        ))
 
     (SostenutoPedal
@@ -792,7 +794,7 @@
        (font-family . roman)
        (font-shape . italic)
        (self-alignment-X . 0)
-       (meta . ((interfaces . (text-interface  self-alignment-interface font-interface))))
+       (meta . ((interfaces . (text-interface  self-alignment-interface font-interface item-interface))))
        ))
 
     (SostenutoPedalLineSpanner 
@@ -803,7 +805,7 @@
        (padding . 1.2)
        (minimum-space . 1.0)
        (direction . -1)
-       (meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface))))
+       (meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface  spanner-interface))))
        ))
        
     (Stem
@@ -832,7 +834,7 @@
        (font-family . music)      
        (avoid-note-head . #f)
        (up-to-staff . #f)
-       (meta . ((interfaces . (stem-interface  font-interface))))
+       (meta . ((interfaces . (stem-interface  font-interface item-interface ))))
        ))
 
     (StemTremolo
@@ -841,20 +843,20 @@
        (Y-extent-callback . ,Stem_tremolo::height)
        (X-extent-callback . #f)
 
-       (beam-width . 2.0) ; staff-space
+       (beam-width . 1.6) ; staff-space
        (beam-thickness . 0.48) ; staff-space
-       (meta . ((interfaces . (stem-tremolo-interface))))
+       (meta . ((interfaces . (stem-tremolo-interface item-interface ))))
        ))
 
     (SeparationItem
      . (
-       (meta . ((interfaces . (spacing-interface separation-item-interface))))
+       (meta . ((interfaces . (spacing-interface separation-item-interface item-interface ))))
        ))
 
     (SeparatingGroupSpanner
      . (
        (spacing-procedure . ,Separating_group_spanner::set_spacing_rods)
-       (meta . ((interfaces . (spacing-interface separation-spanner-interface))))
+       (meta . ((interfaces . (spacing-interface separation-spanner-interface spanner-interface))))
        ))
 
     (SustainPedal
@@ -866,7 +868,7 @@
        (padding . 0.0)  ;; padding relative to SustainPedalLineSpanner
        (pedal-type . text)
        (X-offset-callbacks . (,Self_alignment_interface::aligned_on_self))
-       (meta . ((interfaces . (piano-pedal-interface text-spanner-interface text-interface self-alignment-interface font-interface))))
+       (meta . ((interfaces . (piano-pedal-interface text-spanner-interface text-interface self-alignment-interface font-interface item-interface))))
        ))
 
     (SustainPedalLineSpanner 
@@ -877,7 +879,7 @@
        (padding . 1.2)
        (minimum-space . 1.0)
        (direction . -1)
-       (meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface))))
+       (meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface spanner-interface))))
        ))
 
     (System
@@ -885,7 +887,7 @@
        (axes . (0 1))
        (X-extent-callback . ,Axis_group_interface::group_extent_callback)
        (Y-extent-callback . ,Axis_group_interface::group_extent_callback)      
-       (meta . ((interfaces . (system-interface axis-group-interface))))
+       (meta . ((interfaces . (system-interface axis-group-interface spanner-interface))))
        ))
 
     (SystemStartBrace
@@ -909,7 +911,7 @@
        (arch-width . 1.5)
        (bracket-collapse-height . 1)
        (thickness . 0.25)
-       (meta . ((interfaces . (system-start-delimiter-interface))))
+       (meta . ((interfaces . (system-start-delimiter-interface spanner-interface))))
        ))
 
     (SystemStartBar
@@ -919,7 +921,7 @@
        (glyph . "bar-line")
        (thickness . 1.6)
        (after-line-breaking-callback . ,System_start_delimiter::after_line_breaking)
-       (meta . ((interfaces . (system-start-delimiter-interface))))
+       (meta . ((interfaces . (system-start-delimiter-interface spanner-interface))))
        ))
 
     (TextScript
@@ -932,7 +934,7 @@
        ;; todo: add X self alignment?
        (baseline-skip . 2)
        (font-family . roman)
-       (meta . ((interfaces . (text-script-interface text-interface side-position-interface font-interface))))
+       (meta . ((interfaces . (text-script-interface text-interface side-position-interface font-interface item-interface ))))
        ))
 
     (TextSpanner
@@ -946,7 +948,7 @@
        (width-correct . -1)
 
        (direction . 1)
-       (meta . ((interfaces . (text-spanner-interface side-position-interface font-interface))))               
+       (meta . ((interfaces . (text-spanner-interface side-position-interface font-interface spanner-interface))))             
        ))
     
     (TabNoteHead
@@ -956,7 +958,7 @@
        (molecule-callback . ,tablature-molecule-callback)
        (Y-offset-callbacks  . (,Staff_symbol_referencer::callback))
        (stem-attachment-function . ,tablature-stem-attachment-function)
-       (meta . ((interfaces . (rhythmic-head-interface font-interface note-head-interface staff-symbol-referencer-interface))))
+       (meta . ((interfaces . (rhythmic-head-interface font-interface note-head-interface staff-symbol-referencer-interface item-interface ))))
        ))
 
 
@@ -970,7 +972,7 @@
        (x-gap . -0.1)
        (y-offset . 0.6)
        (minimum-length  . 2.5)
-       (meta . ((interfaces . (tie-interface))))
+       (meta . ((interfaces . (tie-interface spanner-interface))))
        ))
 
     (TieColumn
@@ -978,7 +980,7 @@
        (after-line-breaking-callback . ,Tie_column::after_line_breaking)
        (X-extent-callback . ())
        (Yoo-extent-callback . ())      
-       (meta . ((interfaces . (tie-column-interface))))
+       (meta . ((interfaces . (tie-column-interface spanner-interface))))
        ))
 
     (TimeSignature
@@ -993,7 +995,7 @@
        (breakable . #t)
        (style . C)
        (font-family . number)
-       (meta . ((interfaces . (time-signature-interface break-aligned-interface font-interface))))
+       (meta . ((interfaces . (time-signature-interface break-aligned-interface font-interface item-interface ))))
        ))
 
     (TupletBracket
@@ -1011,7 +1013,7 @@
        (font-shape . italic)
 
        (font-relative-size . -1)
-       (meta .  ((interfaces . (text-interface tuplet-bracket-interface font-interface))))
+       (meta .  ((interfaces . (text-interface tuplet-bracket-interface font-interface spanner-interface))))
        ))
 
     (UnaCordaPedal
@@ -1025,7 +1027,7 @@
        (pedal-type . text)
        (padding . 0.0)  ;; padding relative to UnaCordaPedalLineSpanner
        (X-offset-callbacks . (,Self_alignment_interface::aligned_on_self))
-       (meta . ((interfaces . (text-interface self-alignment-interface font-interface))))
+       (meta . ((interfaces . (text-interface self-alignment-interface font-interface item-interface ))))
        ))
 
     (UnaCordaPedalLineSpanner 
@@ -1035,7 +1037,7 @@
        (padding . 1.2)
        (minimum-space . 1.0)
        (direction . -1)
-       (meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface))))
+       (meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface spanner-interface))))
        ))
 
     (VoltaBracket
@@ -1050,7 +1052,7 @@
        (minimum-space . 5)
        (font-family . number)
        (font-relative-size . -2)
-       (meta . ((interfaces . (volta-bracket-interface text-interface side-position-interface font-interface))))
+       (meta . ((interfaces . (volta-bracket-interface text-interface side-position-interface font-interface spanner-interface))))
        ))
     
     (VerticalAlignment
@@ -1058,7 +1060,7 @@
        (axes . (1))
        (Y-extent-callback . ,Axis_group_interface::group_extent_callback)
        (stacking-dir . -1)
-       (meta . ((interfaces . (align-interface axis-group-interface))))
+       (meta . ((interfaces . (align-interface axis-group-interface spanner-interface))))
        ))
 
     (VerticalAxisGroup
@@ -1066,7 +1068,7 @@
        (axes . (1))
        (Y-extent-callback . ,Axis_group_interface::group_extent_callback)      
        
-       (meta . ((interfaces . (axis-group-interface))))
+       (meta . ((interfaces . (axis-group-interface spanner-interface))))
        ))
    )
  )
@@ -1103,7 +1105,8 @@
 (map (lambda (x)
                                        ; (display (car x)) (newline)
 
-       (set-object-property! (car x) 'translation-type? list?))
+       (set-object-property! (car x) 'translation-type? list?)
+       (set-object-property! (car x) 'is-grob? #t))
      all-grob-descriptions)