Issue 4828/2: Add StaffSymbol.ledger-positions-function

[lilypond.git] / scm / define-grob-properties.scm

diff --git a/scm/define-grob-properties.scm b/scm/define-grob-properties.scm
index fc8c86c5a3241095e2eaf408abccd3130442561a..60b9d5b000c2e6896237aac6c9404857610719ac 100644 (file)
--- a/scm/define-grob-properties.scm
+++ b/scm/define-grob-properties.scm
@@ -575,8 +575,13 @@ lines for.")
 lines.  It is the sum of 2@tie{}numbers: The first is the factor for
 line thickness, and the second for staff space.  Both contributions
 are added.")
-     (ledger-positions ,list? "Repeating pattern for the vertical positions
-of ledger lines.  Bracketed groups are always shown together.")
+     (ledger-positions ,list? "Vertical positions of ledger lines.
+When set on a @code{StaffSymbol} grob it defines a repeating
+pattern of ledger lines and any parenthesized groups will always be
+shown together.")
+     (ledger-positions-function ,scheme? "A quoted Scheme procedure that
+takes a @code{StaffSymbol} grob and the vertical position of a note head
+as arguments and returns a list of ledger line positions.")
      (left-bound-info ,list? "An alist of properties for determining
 attachments of spanners to edges.")
      (left-padding ,ly:dimension? "The amount of space that is put
@@ -610,9 +615,6 @@ visual output is influenced by changes to
 ;;;
      (max-beam-connect ,integer? "Maximum number of beams to connect
 to beams from this stem.  Further beams are typeset as beamlets.")
-     (max-stretch ,number? "The maximum amount that this
-@code{VerticalAxisGroup} can be vertically stretched (for example, in
-order to better fill a page).")
      (maximum-gap ,number? "Maximum value allowed for @code{gap}
 property.")
      (measure-count ,integer? "The number of measures for a
@@ -706,6 +708,11 @@ over the total spanner, where the width of the spanner is normalized
 between 0 and 1.")
      (note-names ,vector? "Vector of strings containing names for
 easy-notation note heads.")
+     (note-collision-threshold ,ly:dimension? "Simultaneous notes that
+are this close or closer in units of @code{staff-space} will be
+identified as vertically colliding. Used by @code{Stem} grobs for notes
+in the same voice, and @code{NoteCollision} grobs for notes in
+different voices. Default value@tie{}1.")
      (number-type ,symbol? "Numbering style. Choices include
 @code{roman-lower}, @code{roman-upper} and @code{arabic}.")
 
@@ -881,7 +888,8 @@ placed vertically.")
 object.")
      (simple-Y ,boolean? "Should the Y placement of a spanner
 disregard changes in system heights?")
-     (size ,number? "Size of object, relative to standard size.")
+     (size ,number? "The ratio of the size of the object to its default
+size.")
      (skip-quanting ,boolean? "Should beam quanting be skipped?")
      (skyline-horizontal-padding ,number? "For determining the
 vertical distance between two staves, it is possible to have a
@@ -1141,16 +1149,14 @@ one below this grob.")
 ;;;
      (when ,ly:moment? "Global time step associated with this column.")
      (whiteout ,boolean-or-number? "If a number or true, the grob is
-printed over a white background that follows the outline of the stencil,
-if the grob is visible.  A number sets the thickness of the outline as a
-multiple of the staff-line thickness.  For compatibility with former
-behavior (now available with @code{whiteout-box}) the value @code{#t} is
-treated as @code{3.0}.  Usually @code{#f} by default.")
-     (whiteout-box ,boolean-or-number? "If a number or true, the grob
-is printed over a rectangular white background to white-out underlying
-material, if the grob is visible.  A number indicates how far the
-outline extends beyond the bounding box of the grob as a multiple of
-the staff-line thickness.  Usually @code{#f} by default.")
+printed over a white background to white-out underlying material, if
+the grob is visible.  A number indicates how far the white background
+extends beyond the bounding box of the grob as a multiple of the
+staff-line thickness.  The shape of the background is determined by
+@code{whiteout-style}.  Usually @code{#f} by default.")
+     (whiteout-style ,symbol? "Determines the shape of the
+@code{whiteout} background.  Available are @code{'outline},
+@code{'rounded-box}, and the default @code{'box}.")
      (width ,ly:dimension? "The width of a grob measured in staff
 space.")
      (word-space ,ly:dimension? "Space to insert between words in