Prevents cross-staff Stems from colliding with articulations.

[lilypond.git] / scm / output-lib.scm

diff --git a/scm/output-lib.scm b/scm/output-lib.scm
index e63e12a5489b0638e12affb0a77f31dfbc57cba2..51a45aab5567b222a1c41a3a86d094fed9580610 100644 (file)
--- a/scm/output-lib.scm
+++ b/scm/output-lib.scm
@@ -58,7 +58,6 @@
 
     (ly:text-interface::interpret-markup layout props text)))
 
-
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; beam slope
 
@@ -133,6 +132,33 @@
          (beg (ly:grob-pure-property grob 'stem-begin-position 0 1000)))
     (abs (- (ly:stem::pure-calc-stem-end-position grob 0 2147483646) beg))))
 
+(define (stem-stub::do-calculations grob)
+  (and (ly:grob-property (ly:grob-parent grob X) 'cross-staff)
+       (not (ly:grob-property (ly:grob-parent grob X) 'transparent))))
+
+(define-public (stem-stub::pure-height grob beg end)
+  (if (stem-stub::do-calculations grob)
+      '(0 . 0)
+      '(+inf.0 . -inf.0)))
+
+(define-public (stem-stub::width grob)
+  (if (stem-stub::do-calculations grob)
+      (grob::x-parent-width grob)
+      '(+inf.0 . -inf.0)))
+
+(define-public (stem-stub::extra-spacing-height grob)
+  (if (stem-stub::do-calculations grob)
+      (let* ((dad (ly:grob-parent grob X))
+             (refp (ly:grob-common-refpoint grob dad Y))
+             (stem_ph (ly:grob-pure-height dad refp 0 1000000))
+             (my_ph (ly:grob-pure-height grob refp 0 1000000))
+             ;; only account for distance if stem is on different staff than stub
+             (dist (if (grob::has-interface refp 'hara-kiri-group-spanner-interface)
+                       0
+                       (- (car my_ph) (car stem_ph)))))
+        (if (interval-empty? (interval-intersection stem_ph my_ph)) #f (coord-translate stem_ph dist)))
+      #f))
+
 (define-public (note-head::calc-duration-log grob)
   (min 2
        (ly:duration-log
@@ -406,19 +432,15 @@ and duration-log @var{log}."
     (coord-operation - from-neighbors height)))
 
 (define-public (pure-from-neighbor-interface::account-for-span-bar grob)
-  (define (other-op x) (x (cons cdr car)))
   (let* ((esh (pure-from-neighbor-interface::extra-spacing-height grob))
-         (hsb (ly:grob-property grob 'has-span-bar)))
+         (hsb (ly:grob-property grob 'has-span-bar))
+         (ii (interval-intersection esh (cons -1.01 1.01))))
     (if (pair? hsb)
-      (cons-map
-        (lambda (x)
-          (if (and ((other-op x) hsb)
-                   (not (and (eq? x car)
-                             (not (ly:grob-property grob 'allow-span-bar)))))
-              (x esh)
-              (x (cons -1.01 1.01))))
-        (cons car cdr))
-      '(-1.01 . 1.01))))
+        (cons (car (if (and (car hsb)
+                       (ly:grob-property grob 'allow-span-bar))
+                       esh ii))
+              (cdr (if (cdr hsb) esh ii)))
+        ii)))
 
 (define-public (pure-from-neighbor-interface::extra-spacing-height-including-staff grob)
   (let ((esh (pure-from-neighbor-interface::extra-spacing-height grob))