+}
+
+% TODO: Gregorian Chant contexts should be moved to gregorian-init.ly,
+% but this does not work (is this a bug or intended behaviour?):
+%
+% If I try to do so, I get "error: unknown escaped string:
+% `\VaticanaStaffContext'" in params-init.ly. If I also move
+% "\translator { \Vaticana*Context }" from params-init.ly to the end
+% of gregorian-init.ly, then I get "error: parse error, unexpected
+% TRANSLATOR: \translator { \VaticanaStaffContext }" in
+% gregorian-init.ly. --jr
+
+VaticanaVoiceContext = \translator {
+ \VoiceContext
+ \name "VaticanaVoice"
+ \alias "Voice"
+ \description "Same as @code{Voice} context, except that it is accommodated for tyepsetting Gregorian Chant in the notational style of Editio Vaticana."
+
+ % We can not remove Slur_engraver, since \addlyrics depends on it.
+ % Instead, we make the grob transparent.
+ % Unfortunately, this gives us a lot of warnings ("Degenerate bow:
+ % infinite steepness reqd"), since in ligatures, all note heads are in
+ % the same paper column such that the (transparent) slurs eventually may
+ % start and end in the same column.
+ Slur \override #'transparent = ##t
+
+ % We can not remove Stem_engraver, since slurs depend on stems. If
+ % we try anyway, lily will crash in slur.scm:16:6: "Wrong type argument
+ % in position 1 (expecting grob): ()".
+ % As a workaround, we make the grob transparent.
+ Stem \set #'transparent = ##t
+
+ % Since we do not remove stems, but only make it transparent, we have
+ % to set the length to 0.0. Otherwise, articulation marks (such as
+ % ictus, circulus or accentus) may be vertically placed quite away from
+ % the note head.
+ Stem \set #'length = #'0.0
+
+ \remove "Ligature_bracket_engraver"
+ \consists "Vaticana_ligature_engraver"
+
+ % Set default head for notes outside of \[ \].
+ NoteHead \set #'style = #'vaticana_punctum
+
+ % Put some space before and after divisiones.
+ % FIXME: This does not seem to show any effect.
+ Script \set #'padding = #0.5
+
+ % There are no beams in Gregorian Chant notation.
+ autobeaming = ##f
+
+ % Prepare TextSpanner for \episem{Initium|Finis} use.
+ TextSpanner \set #'style = #'line
+ TextSpanner \set #'edge-height = #'(0 . 0)
+ TextSpanner \set #'padding = #0.5
+ TextSpanner \set #'enclose-bounds = ##t
+ TextSpanner \set #'edge-text = #'("" . "")
+}
+
+VaticanaStaffContext = \translator {
+ \StaffContext
+ \name "VaticanaStaff"
+ \alias "Staff"
+ \denies "Voice"
+ \accepts "VaticanaVoice"
+ \description "Same as @code{Staff} context, except that it is accommodated for tyepsetting Gregorian Chant in the notational style of Editio Vaticana."
+
+ \remove "Time_signature_engraver"
+ \consists "Custos_engraver"
+
+ % We can not remove Bar_engraver; otherwise clefs and custodes will
+ % not show up any more among other line breaking issues.
+ % Instead, we make the grob transparent.
+ BarLine \set #'transparent = ##t
+
+ StaffSymbol \set #'line-count = #4
+ StaffSymbol \set #'thickness = #0.6
+
+ % FIXME: unit on StaffSymbol's width should be \linewidth.
+ % StaffSymbol \set #'width = #60.0
+
+ % Choose vaticana do clef on 3rd line as default.
+ clefGlyph = #"clefs-vaticana_do"
+ centralCPosition = #1
+ clefPosition = #1
+ clefOctavation = #0
+
+ % Select vaticana style font.
+ KeySignature \set #'style = #'vaticana
+ Accidental \set #'style = #'vaticana
+ Custos \set #'style = #'vaticana
+ Custos \set #'neutral-position = #3
+ Custos \set #'neutral-direction = #-1
+ Custos \set #'adjust-if-on-staffline = ##t
+
+ % Score.timing = ##f
+ % Score.barAlways = ##t
+}
+
+GregorianTranscriptionVoiceContext = \translator {
+ \VoiceContext
+ \name "GregorianTranscriptionVoice"
+ \alias "Voice"
+
+ % Removing ligature bracket engraver without replacing it by some
+ % other ligature engraver would cause a "Junking event: `LigatureEvent'"
+ % warning for every "\[" and "\]". Therefore, we make the grob
+ % transparent instead.
+ LigatureBracket \set #'transparent = ##t
+
+ % We can not remove Slur_engraver, since \addlyrics depends on it.
+ % Instead, we make the grob transparent.
+ % Unfortunately, this gives us a lot of warnings ("Degenerate bow:
+ % infinite steepness reqd"), since in ligatures, all note heads are in
+ % the same paper column such that the (transparent) slurs eventually may
+ % start and end in the same column.
+ Slur \override #'transparent = ##t
+
+ % We can not remove Stem_engraver, since slurs depend on stems. If
+ % we try anyway, lily will crash in slur.scm:16:6: "Wrong type argument
+ % in position 1 (expecting grob): ()".
+ % As a workaround, we make the grob transparent.
+ Stem \set #'transparent = ##t
+
+ % Since we do not remove stems, but only make it transparent, we have
+ % to set the length to 0.0. Otherwise, articulation marks (such as
+ % ictus, circulus or accentus) may be vertically placed quite away from
+ % the note head.
+ Stem \set #'length = #'0.0
+
+ % Put some space before and after divisiones.
+ % FIXME: This does not seem to show any effect.
+ Script \set #'padding = #0.5
+
+ % There are no beams in Gregorian Chant notation.
+ autobeaming = ##f
+
+ % Prepare TextSpanner for \episem{Initium|Finis} use.
+ TextSpanner \set #'style = #'line
+ TextSpanner \set #'edge-height = #'(0 . 0)
+ TextSpanner \set #'padding = #0.5
+ TextSpanner \set #'enclose-bounds = ##t
+ TextSpanner \set #'edge-text = #'("" . "")
+}