input/regression/incipit.ly

   1 \header {
   2
   3   texidoc = "Incipit can be printed using an InstrumentName grob."
   4
   5 }
   6
   7 \version "2.12.0"
   8
   9 %% to avoid warnings:
  10 #(set-object-property! 'music 'backend-type? ly:music?)
  11 #(set-object-property! 'music 'backend-doc "Incipit music")
  12
  13 \score {
  14   \new Staff {
  15     %% All this would be shortcuted by an appropriate music function:
  16     \override Staff.InstrumentName #'music = ##{ \clef "petrucci-c1" c'4 d' e' f' #}
  17     \override Staff.InstrumentName #'self-alignment-X = #RIGHT
  18     \override Staff.InstrumentName #'self-alignment-Y = #UP
  19     \override Staff.InstrumentName #'Y-offset = #4
  20     \override Staff.InstrumentName #'padding = #0
  21     \override Staff.InstrumentName #'stencil =
  22     #(lambda (grob)
  23        (let* ((instrument-name (ly:grob-property grob 'long-text))
  24               (layout (ly:output-def-clone (ly:grob-layout grob)))
  25               (music (make-music 'SequentialMusic
  26                       'elements (list (make-music 'ContextSpeccedMusic
  27                                         'context-type 'MensuralStaff
  28                                         'element (make-music 'PropertySet
  29                                                    'symbol 'instrumentName
  30                                                    'value instrument-name))
  31                                       (ly:grob-property grob 'music))))
  32               (score (ly:make-score music))
  33               (mm (ly:output-def-lookup layout 'mm))
  34               (indent (ly:output-def-lookup layout 'indent))
  35               (incipit-width (ly:output-def-lookup layout 'incipit-width))
  36               (scaled-incipit-width (if (number? incipit-width)
  37                                         (* incipit-width mm)
  38                                         (* indent 0.5))))
  39          (ly:output-def-set-variable! layout 'indent (- indent scaled-incipit-width))
  40          (ly:output-def-set-variable! layout 'line-width indent)
  41          (ly:output-def-set-variable! layout 'ragged-right #f)
  42          (ly:score-add-output-def! score layout)
  43          (set! (ly:grob-property grob 'long-text)
  44                (markup #:score score))
  45          (ly:system-start-text::print grob)))
  46
  47     %% the instrument name definition is separated:
  48     \set Staff.instrumentName = \markup Instrument
  49     c'4 d' e' f' g'1
  50   }
  51   \layout {
  52     ragged-right = ##t
  53     indent = 5\cm
  54     incipit-width = 3 \cm
  55   }
  56 }