Require 2.4 <= x < 3.0 where x=Python version.

[lilypond.git] / Documentation / snippets / center-text-below-hairpin-dynamics.ly

diff --git a/Documentation/snippets/center-text-below-hairpin-dynamics.ly b/Documentation/snippets/center-text-below-hairpin-dynamics.ly
index b69e4e0dffe29700ddb6bcaa31bda3d7ae2dcb7c..8ff363a61f1c260a45e246a261fa718b75afc2a2 100644 (file)
--- a/Documentation/snippets/center-text-below-hairpin-dynamics.ly
+++ b/Documentation/snippets/center-text-below-hairpin-dynamics.ly
@@ -4,7 +4,7 @@
 %% and then run scripts/auxiliar/makelsr.py
 %%
 %% This file is in the public domain.
-\version "2.17.6"
+\version "2.17.20"
 
 \header {
   lsrtags = "expressive-marks, really-cool, scheme-language, text"
@@ -13,9 +13,10 @@
 This example provides a function to typeset a hairpin (de)crescendo
 with some additional text below it, such as @qq{molto} or @qq{poco}.
 The added text will change the direction according to the direction of
-the hairpin. The Hairpin is aligned to DynamicText.  The example also
-illustrates how to modify the way an object is normally printed, using
-some Scheme code.
+the hairpin. The Hairpin is aligned to DynamicText.
+
+The example also illustrates how to modify the way an object is
+normally printed, using some Scheme code.
 
 "
   doctitle = "Center text below hairpin dynamics"
@@ -30,20 +31,27 @@ hairpinWithCenteredText =
              (par-y (ly:grob-parent grob Y))
              (dir (ly:grob-property par-y 'direction))
              (new-stencil (ly:stencil-aligned-to
-                          (ly:stencil-combine-at-edge
-                            (ly:stencil-aligned-to stencil X CENTER)
-                            Y dir
-                            (ly:stencil-aligned-to (grob-interpret-markup grob text) X CENTER))
-                            X LEFT))
+               (ly:stencil-combine-at-edge
+                 (ly:stencil-aligned-to stencil X CENTER)
+                 Y dir
+                 (ly:stencil-aligned-to (grob-interpret-markup grob text) X CENTER))
+               X LEFT))
              (staff-space (ly:output-def-lookup (ly:grob-layout grob) 'staff-space))
-             (staff-line-thickness (ly:output-def-lookup (ly:grob-layout grob) 'line-thickness))
+             (staff-line-thickness
+               (ly:output-def-lookup (ly:grob-layout grob) 'line-thickness))
              (grob-name (lambda (x) (assq-ref (ly:grob-property x 'meta) 'name)))
              (par-x (ly:grob-parent grob X))
              (dyn-text (eq? (grob-name par-x) 'DynamicText ))
-             (dyn-text-stencil-x-length (if dyn-text
-                                           (interval-length (ly:stencil-extent (ly:grob-property par-x 'stencil) X))
-                                           0))
-             (x-shift (if dyn-text (- (+ staff-space dyn-text-stencil-x-length) (* 0.5 staff-line-thickness)) 0)))
+             (dyn-text-stencil-x-length
+               (if dyn-text
+                 (interval-length
+                   (ly:stencil-extent (ly:grob-property par-x 'stencil) X))
+                 0))
+             (x-shift
+               (if dyn-text
+                 (-
+                   (+ staff-space dyn-text-stencil-x-length)
+                   (* 0.5 staff-line-thickness)) 0)))
 
       (ly:grob-set-property! grob 'Y-offset 0)
       (ly:grob-set-property! grob 'stencil