X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Fmusic-functions.scm;h=5af90d22606c00012469bd194f4551a81b077257;hb=e421edccdc9aa2dbcdea52bdc35149d35997d224;hp=f9d0d9da1f8221d2bc66e5ffd40d5e279279d961;hpb=fd8ed70c80d71a3bc6e0e62cc86a3659e23eb0a2;p=lilypond.git

diff --git a/scm/music-functions.scm b/scm/music-functions.scm
index f9d0d9da1f..5af90d2260 100644
--- a/scm/music-functions.scm
+++ b/scm/music-functions.scm
@@ -1,81 +1,171 @@
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
-(define-public (denominator-tuplet-formatter mus)
-  (number->string (ly-get-mus-property mus 'denominator)))
+(define-public (music-map function music)
+  "Apply @var{function} to @var{music} and all of the music it contains. "
+  (let* ((es (ly:get-mus-property music 'elements))
+         (e (ly:get-mus-property music 'element))
+	 )
 
-(define-public (fraction-tuplet-formatter mus)
-  (string-append (number->string (ly-get-mus-property mus 'numerator))
-		 ":"
-		 (number->string (ly-get-mus-property mus 'denominator))
-		 ))
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+    (ly:set-mus-property! music 'elements 
+	(map (lambda (y) (music-map  function y)) es))
+	(if (ly:music? e)
+	    (ly:set-mus-property! music 'element (music-map function  e)))
+	(function music)
+	))
+
+(define-public (music-filter pred? music)
+  "Filter out music expressions that do not satisfy PRED."
+  
+  (define (inner-music-filter pred? music)
+    "Recursive function."
+    (let* ((es (ly:get-mus-property music 'elements))
+	   (e (ly:get-mus-property music 'element))
+	   (as (ly:get-mus-property music 'articulations))
+	   (filtered-as (filter ly:music? (map (lambda (y) (inner-music-filter pred? y)) as)))
+	   (filtered-e (if (ly:music? e)
+			   (inner-music-filter pred? e)
+			   e))
+	   (filtered-es (filter ly:music? (map (lambda (y) (inner-music-filter pred? y)) es)))
+	   )
+
+      (ly:set-mus-property! music 'element filtered-e)
+      (ly:set-mus-property! music 'elements filtered-es)
+      (ly:set-mus-property! music 'articulations filtered-as)
+
+      ;; if filtering emptied the expression, we remove it completely.
+      (if (or (pred? music)
+	      (and (eq? filtered-es '()) (not (ly:music? e))
+		   (or (not (eq? es '()))
+		       (ly:music? e))))
+	  (set! music '()))
+      
+      music))
+
+  (set! music (inner-music-filter pred? music))
+  (if (ly:music? music)
+      music
+      (make-music-by-name 'Music)	;must return music.
+      ))
+
+(define-public (remove-tag tag)
+  (lambda (mus)
+    (music-filter
+     (lambda (m)
+       (let* ((tags (ly:get-mus-property m 'tags))
+	      (res (memq tag tags)))
+       res)) mus)))
+
+(define-public (display-music music)
+  "Display music, not done with music-map for clarity of presentation."
+  (display music)
+  (display ": { ")
+  
+  (let* ((es (ly:get-mus-property music 'elements))
+         (e (ly:get-mus-property music 'element))
+	 )
 
+    (display (ly:get-mutable-properties music))
 
-(define-public (shift-duration-log music shift dot)
-  "Recurse through music, adding SHIFT to duration-log and optionally 
+    (if (pair?  es)
+	(begin (display "\nElements: {\n")
+	       (map display-music es)
+	       (display "}\n")
+	))
+    
+    
+    (if (ly:music? e)
+	(begin
+	  (display "\nChild:")
+	  (display-music e)
+	  )
+	)
+    )
+  (display " }\n")
+  music
+  )
+
+
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(define (shift-one-duration-log music shift dot)
+  "  add SHIFT to ly:duration-log and optionally 
   a dot to any note encountered. This scales the music up by a factor 
   2^shift * (2 - (1/2)^dot)"
-  (let* ((es (ly-get-mus-property music 'elements))
-         (e (ly-get-mus-property music 'element))
-         (n  (ly-music-name music))
-	 (f  (lambda (x)  (shift-duration-log x shift dot)))
-	 )
-    (if (or (equal? n "Note_req")
-	    (equal? n "Rest_req"))
+
+  (let*
+      (
+       (d (ly:get-mus-property music 'duration))
+       )
+    (if (ly:duration? d)
 	(let* (
-	       (d (ly-get-mus-property music 'duration))
-	       (cp (duration-factor d))
-	       (nd (make-duration (+ shift (duration-log d))
-				  (+ dot (duration-dot-count d))
-				  (car cp)
-				  (cdr cp)))
+	       (cp (ly:duration-factor d))
+	       (nd (ly:make-duration (+ shift (ly:duration-log d))
+				     (+ dot (ly:duration-dot-count d))
+				     (car cp)
+				     (cdr cp)))
 	       
 	       )
-	  (ly-set-mus-property! music 'duration nd)
+	  (ly:set-mus-property! music 'duration nd)
 	  ))
-    
-    (if (pair? es)
-        (ly-set-mus-property!
-         music 'elements
-         (map f es)))
-    
-    (if (music? e)
-        (ly-set-mus-property!
-         music 'element
-         (f e)))
-    
     music))
 
 
+
+(define-public (shift-duration-log music shift dot)
+  (music-map (lambda (x) (shift-one-duration-log x shift dot))
+	     music))
+  
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; clusters.
+
+(define-public (note-to-cluster music)
+  "Replace NoteEvents by ClusterNoteEvents."
+  (if (eq? (ly:get-mus-property music 'name) 'NoteEvent)
+      (let* ((cn (make-music-by-name 'ClusterNoteEvent)))
+
+	     (ly:set-mus-property! cn 'pitch (ly:get-mus-property music 'pitch))
+	     (ly:set-mus-property! cn 'duration (ly:get-mus-property music 'duration))
+	     cn)
+      music))
+
+(define-public (notes-to-clusters music)
+  (music-map note-to-cluster music))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; repeats.
+
 (define-public (unfold-repeats music)
 "
 This function replaces all repeats  with unfold repeats. It was 
 written by Rune Zedeler. "
-  (let* ((es (ly-get-mus-property music 'elements))
-         (e (ly-get-mus-property music 'element))
-         (n  (ly-music-name music)))
+  (let* ((es (ly:get-mus-property music 'elements))
+         (e (ly:get-mus-property music 'element))
+         (n  (ly:music-name music)))
  
     (if (equal? n "Repeated_music")
         (begin
 	  (if (equal?
-	       (ly-get-mus-property music 'iterator-ctor)
+	       (ly:get-mus-property music 'iterator-ctor)
 	       Chord_tremolo_iterator::constructor)
-	      (shift-duration-log music  (intlog2 (ly-get-mus-property music 'repeat-count)) 0)
+	      (shift-duration-log music  (ly:intlog2 (ly:get-mus-property music 'repeat-count)) 0)
 	      )
-          (ly-set-mus-property!
+          (ly:set-mus-property!
            music 'length Repeated_music::unfolded_music_length)
-	  (ly-set-mus-property!
+	  (ly:set-mus-property!
 	   music 'start-moment-function Repeated_music::first_start)
-          (ly-set-mus-property!
+          (ly:set-mus-property!
            music 'iterator-ctor Unfolded_repeat_iterator::constructor)))
 
     (if (pair? es)
-        (ly-set-mus-property!
+        (ly:set-mus-property!
          music 'elements
          (map unfold-repeats es)))
 
-    (if (music? e)
-        (ly-set-mus-property!
+    (if (ly:music? e)
+        (ly:set-mus-property!
          music 'element
          (unfold-repeats e)))
 
@@ -83,84 +173,53 @@ written by Rune Zedeler. "
 
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; property setting music objs.
 
-(define  (pitchify-scripts music)
-  "Copy the pitch fields of the Note_requests into  Text_script_requests, to aid
-Fingering_engraver."
-  (define (find-note musics)
-    (filter-list (lambda (m) (equal? (ly-music-name m) "Note_req")) musics)
-    )
-  (define (find-scripts musics)
-    (filter-list (lambda (m) (equal? (ly-music-name m) "Text_script_req")) musics))
+(define-public (make-grob-property-set grob gprop val)
 
-  (let* (
-	 (e (ly-get-mus-property music 'element))
-	 (es (ly-get-mus-property music 'elements))
-	 (notes (find-note es))
-	 (pitch (if (pair? notes) (ly-get-mus-property (car  notes) 'pitch) #f))
-	 )
-
-    (if pitch
-	(map (lambda (x) (ly-set-mus-property! x 'pitch pitch)) (find-scripts es))
-	)
-	
-    (if (pair? es)
-        (ly-set-mus-property!
-         music 'elements
-         (map pitchify-scripts es)))
-
-    (if (music? e)
-        (ly-set-mus-property!
-         music 'element
-         (pitchify-scripts e)))
-
-    music))
-
-
-;;;;;;;;;;;;;;;;;
-;;;;;;;;;;;;;;;;
-;;;;;;;;;;;;;;;;
-
-
-(define (make-grob-property-set grob gprop val)
-  "Make a M-exp that sets GPROP to VAL in GROBS. Does a pop first, i.e.
-this is not an override 
-"
+  "Make a Music expression that sets GPROP to VAL in GROB. Does a pop first,
+i.e.  this is not an override"
   
-   (let* ((m (ly-make-music  "Music")))
-     (ly-set-mus-property! m 'iterator-ctor Push_property_iterator::constructor)
-     (ly-set-mus-property! m 'symbol grob)
-     (ly-set-mus-property! m 'grob-property gprop)
-     (ly-set-mus-property! m 'grob-value val)
-     (ly-set-mus-property! m 'pop-first #t)
+   (let* ((m (make-music-by-name  'OverrideProperty)))
+     (ly:set-mus-property! m 'symbol grob)
+     (ly:set-mus-property! m 'grob-property gprop)
+     (ly:set-mus-property! m 'grob-value val)
+     (ly:set-mus-property! m 'pop-first #t)
 		
      m
    
    ))
-   
-(define (make-grob-property-revert grob gprop)
+
+
+(define-public (make-grob-property-revert grob gprop)
   "Revert the grob property GPROP for GROB."
-   (let* ((m (ly-make-music  "Music")))
-     (ly-set-mus-property! m 'iterator-ctor Pop_property_iterator::constructor)
-     (ly-set-mus-property! m 'symbol grob)
-     (ly-set-mus-property! m 'grob-property gprop)
+   (let* ((m (make-music-by-name  'OverrideProperty)))
+     (ly:set-mus-property! m 'symbol grob)
+     (ly:set-mus-property! m 'grob-property gprop)
 		
      m
    
    ))
-   
-(define (make-voice-props-set n)
+
+
+(define-public (make-voice-props-set n)
   (make-sequential-music
    (append
       (map (lambda (x) (make-grob-property-set x 'direction
 					       (if (odd? n) -1 1)))
-	   '(Tie Slur Stem Dots))
-      (list (make-grob-property-set 'NoteColumn 'horizontal-shift (quotient n 2)))
+	   '(Tie Slur Script TextScript Stem Dots))
+      (list
+       (make-grob-property-set 'NoteColumn 'horizontal-shift (quotient n 2))
+       (make-grob-property-set 'MultiMeasureRest 'staff-position
+			       (if (odd? n) -4 4)
+			       )
+       
+       )
    )
   ))
 
-(define (make-voice-props-revert)
+
+(define-public (make-voice-props-revert)
   (make-sequential-music
    (list
       (make-grob-property-revert 'Tie 'direction)
@@ -171,59 +230,245 @@ this is not an override
    ))
   )
 
-(define (context-spec-music m context . rest)
+
+(define-public (context-spec-music m context . rest)
   "Add \context CONTEXT = foo to M. "
   
-  (let* ((cm (ly-make-music "Context_specced_music")))
-    (ly-set-mus-property! cm 'element m)
-    (ly-set-mus-property! cm 'context-type context)
+  (let* ((cm (make-music-by-name 'ContextSpeccedMusic)))
+    (ly:set-mus-property! cm 'element m)
+    (ly:set-mus-property! cm 'context-type context)
     (if (and  (pair? rest) (string? (car rest)))
-	(ly-set-mus-property! cm 'context-id (car rest))
+	(ly:set-mus-property! cm 'context-id (car rest))
     )
     cm
   ))
 
-(define (make-sequential-music elts)
-  (let*  ((m (ly-make-music "Sequential_music")))
-    (ly-set-mus-property! m 'elements elts)
+(define-public (make-apply-context func)
+  (let*
+      ((m (make-music-by-name 'ApplyContext)))
+
+    (ly:set-mus-property! m 'procedure func)
     m
   ))
 
-(define (make-simultaneous-music elts)
-  (let*  ((m (ly-make-music "Simultaneous_music")))
-    (ly-set-mus-property! m 'elements elts)
+(define-public (make-sequential-music elts)
+  (let*  ((m (make-music-by-name 'SequentialMusic)))
+    (ly:set-mus-property! m 'elements elts)
+    m
+  ))
+
+(define-public (make-simultaneous-music elts)
+  (let*  ((m (make-music-by-name 'SimultaneousMusic)))
+    (ly:set-mus-property! m 'elements elts)
+    m
+    ))
+
+(define-public (make-event-chord elts)
+  (let*  ((m (make-music-by-name 'EventChord)))
+    (ly:set-mus-property! m 'elements elts)
     m
     ))
 
-(define (music-separator? m)
-  "Is M a separator."
-  (let* ((n (ly-get-mus-property m 'name )))
-    (and (symbol? n) (equal? 'separator n))
+
+(define-public (make-nonevent-skip dur)
+  (let*  ((m (make-music-by-name 'NonEventSkip)))
+    (ly:set-mus-property! m 'duration dur)
+    m
   ))
 
-(define (split-one sep?  l acc)
-  "Split off the first parts before separator and return both parts.
+;;;;;;;;;;;;;;;;
 
-"
-  (if (null? l)
-      (cons acc '())
-      (if (sep? (car l))
-	  (cons acc (cdr l))
-	  (split-one sep? (cdr l) (cons (car l) acc))
-	  )
+;; mmrest
+(define-public (make-multi-measure-rest duration location)
+  (let*
+      (
+       (start (make-music-by-name 'MultiMeasureRestEvent))
+       (stop  (make-music-by-name 'MultiMeasureRestEvent))
+       (skip ( make-music-by-name 'SkipEvent))
+       (ch (make-music-by-name 'BarCheck))
+       (ch2  (make-music-by-name 'BarCheck))
+       (seq  (make-music-by-name 'MultiMeasureRestMusicGroup))
+       )
+
+    (map (lambda (x) (ly:set-mus-property! x 'origin location))
+	 (list start stop skip ch ch2 seq))
+    (ly:set-mus-property! start 'span-direction START)
+    (ly:set-mus-property! stop 'span-direction STOP)    
+    (ly:set-mus-property! skip 'duration duration)
+    (ly:set-mus-property! seq 'elements
+     (list
+      ch
+      (make-event-chord (list start))
+      (make-event-chord (list skip))
+      (make-event-chord (list stop))
+      ch2
       ))
 
-(define (split-list l sep?)
-  (if (null? l)
-      '()
-      (let* ((c (split-one sep? l '())))
-	(cons (reverse! (car c) '()) (split-list (cdr c) sep?))
-	)
-      )
+    seq
+    ))
+
+(define-public (glue-mm-rest-texts music)
+  "Check if we have R1*4-\markup { .. }, and if applicable convert to
+a property set for MultiMeasureRestNumber."
+  
+  (define (script-to-mmrest-text script-music)
+    "Extract 'direction and 'text   from SCRIPT-MUSIC, and transform into property sets."
+    
+    (let*
+	(
+	 (text (ly:get-mus-property script-music 'text))
+	 (dir (ly:get-mus-property script-music 'direction))
+	 (p (make-music-by-name 'MultiMeasureTextEvent))
+	 )
+
+      (if (ly:dir? dir)
+	  (ly:set-mus-property! p  'direction dir))
+      (ly:set-mus-property! p 'text text)
+      p
+    ))
+  
+  (if (eq? (ly:get-mus-property music 'name)  'MultiMeasureRestMusicGroup)
+      (let*
+	  (
+	   (text? (lambda (x) (memq 'script-event (ly:get-mus-property x 'types))))
+	   (es (ly:get-mus-property  music 'elements))
+	   (texts (map script-to-mmrest-text  (filter text? es)))
+	   (others (remove text? es))
+	   )
+	(if (pair? texts)
+	    (ly:set-mus-property!
+	     music 'elements
+	     (cons (make-event-chord texts) others)
+	    ))
+      ))
+  music
   )
 
-;; test code
-; (display (split-list '(a b c / d e f / g) (lambda (x) (equal? x '/))) )
+
+(define-public (make-property-set sym val)
+  (let*
+      (
+       (m (make-music-by-name 'PropertySet))
+       )
+    (ly:set-mus-property! m 'symbol sym)
+    (ly:set-mus-property! m 'value val)
+    m
+  ))
+
+
+
+(define-public (make-ottava-set octavation)
+  (let*
+      ((m (make-music-by-name 'ApplyContext)))
+    
+  
+  (define (ottava-modify context)
+    "Either reset centralCPosition to the stored original,
+or remember old centralCPosition, add OCTAVATION to centralCPosition,
+and set OTTAVATION to `8va', or whatever appropriate."
+    (if (number? (ly:get-context-property  context 'centralCPosition))
+	
+	(if (= octavation 0)
+	    (let*
+		((where (ly:context-property-where-defined context 'centralCPosition))
+		 (oc0 (ly:get-context-property context 'originalCentralCPosition)))
+
+	      (ly:set-context-property! context 'centralCPosition oc0)
+	      (ly:unset-context-property where 'originalCentralCPosition)
+	      (ly:unset-context-property where 'ottavation))
+
+	    (let*
+		((where (ly:context-property-where-defined context 'centralCPosition))
+		 (c0 (ly:get-context-property context 'centralCPosition))
+		 (new-c0 (+ c0 (* -7 octavation)))
+		 (string (cdr
+			  (assoc octavation '((2 . "15ma")
+					      (1 . "8va")
+					      (0 . #f)
+					      (-1 . "8va bassa")
+					      (-2 . "15ma bassa"))))))
+
+	      (ly:set-context-property! context 'centralCPosition new-c0)
+	      (ly:set-context-property! context 'originalCentralCPosition c0)
+	      (ly:set-context-property! context 'ottavation string)
+	      
+	      ))))
+
+  (ly:set-mus-property! m 'procedure  ottava-modify)
+  (context-spec-music m 'Staff)
+  ))
+
+(define-public (set-octavation ottavation)
+  (ly:export (make-ottava-set ottavation)))
+
+(define-public (make-time-signature-set num den . rest)
+  " Set properties for time signature NUM/DEN.
+Rest can contain a list of beat groupings 
+
+"
+  
+  (let*
+      (
+       (set1 (make-property-set 'timeSignatureFraction (cons num den) ))
+       (beat (ly:make-moment 1 den))
+       (len  (ly:make-moment num den))
+       (set2 (make-property-set 'beatLength beat))
+       (set3 (make-property-set 'measureLength len))
+       (set4 (make-property-set 'beatGrouping (if (pair? rest)
+						  (car rest)
+						  '())))
+       (basic  (list set1 set2 set3 set4)))
+
+    (context-spec-music
+     (make-sequential-music basic) 'Timing)))
+
+(define-public (set-time-signature num den . rest)
+  (ly:export (apply make-time-signature-set `(,num ,den . ,rest))))
+
+(define-public (make-penalty-music pen)
+ (let
+     ((m (make-music-by-name 'BreakEvent)))
+   (ly:set-mus-property! m 'penalty pen)
+   m))
+
+(define-public (make-articulation name)
+  (let* (
+	 (m (make-music-by-name 'ArticulationEvent))
+      )
+      (ly:set-mus-property! m 'articulation-type name)
+      m
+  ))
+
+(define-public (make-lyric-event string duration)
+  (let* ((m (make-music-by-name 'LyricEvent)))
+
+    (ly:set-mus-property! m 'duration duration)
+    (ly:set-mus-property! m 'text string)
+    m))
+
+(define-public (make-span-event type spandir)
+  (let* (
+	 (m (make-music-by-name  type))
+	 )
+    (ly:set-mus-property! m 'span-direction spandir)
+    m
+    ))
+
+(define-public (set-mus-properties! m alist)
+  "Set all of ALIST as properties of M." 
+  (if (pair? alist)
+      (begin
+	(ly:set-mus-property! m (caar alist) (cdar alist))
+	(set-mus-properties! m (cdr alist)))
+  ))
+
+
+
+(define-public (music-separator? m)
+  "Is M a separator?"
+  (let* ((ts (ly:get-mus-property m 'types )))
+    (memq 'separator ts)
+  ))
 
 
 ;;; splitting chords into voices.
@@ -242,17 +487,16 @@ this is not an override
 		(make-voice-props-set number)
 		(make-simultaneous-music (car lst))))
 
-	      "Voice"  (number->string number))
+	      'Voice  (number->string number))
 	      (voicify-list (cdr lst) (+ number 1))
        ))
    )
 
 (define (voicify-chord ch)
   "Split the parts of a chord into different Voices using separator"
-   (let* ((es (ly-get-mus-property ch 'elements)))
-
-
-     (ly-set-mus-property!  ch 'elements
+   (let* ((es (ly:get-mus-property ch 'elements)))
+     
+     (ly:set-mus-property!  ch 'elements
        (voicify-list (split-list es music-separator?) 0))
      ch
    ))
@@ -260,54 +504,107 @@ this is not an override
 (define (voicify-music m)
    "Recursively split chords that are separated with \\ "
    
-   (if (not (music? m))
+   (if (not (ly:music? m))
        (begin (display m)
        (error "not music!"))
        )
    (let*
-       ((es (ly-get-mus-property m 'elements))
-	(e (ly-get-mus-property m 'element))
+       ((es (ly:get-mus-property m 'elements))
+	(e (ly:get-mus-property m 'element))
 	)
      (if (pair? es)
-	 (ly-set-mus-property! m 'elements (map voicify-music es)))
-     (if (music? e)
-	 (ly-set-mus-property! m 'element  (voicify-music e)))
+	 (ly:set-mus-property! m 'elements (map voicify-music es)))
+     (if (ly:music? e)
+	 (ly:set-mus-property! m 'element  (voicify-music e)))
      (if
-      (and (equal? (ly-music-name m) "Simultaneous_music")
-	   (reduce (lambda (x y ) (or x y)) 	(map music-separator? es)))
+      (and (equal? (ly:music-name m) "Simultaneous_music")
+	   (reduce (lambda (x y ) (or x y)) #f (map music-separator? es)))
       (voicify-chord m)
       )
 
      m
      ))
 
+(define-public (empty-music)
+  (ly:export (make-music-by-name 'Music))
+  )
 ;;;
 
-;;;;;;;;;;;;;;;;
-;;;;;;;;;;;;;;;;
+; Make a function that checks score element for being of a specific type. 
+(define-public (make-type-checker symbol)
+  (lambda (elt)
+    ;;(display  symbol)
+    ;;(eq? #t (ly:get-grob-property elt symbol))
+    (not (eq? #f (memq symbol (ly:get-grob-property elt 'interfaces))))))
+
+(define-public ((outputproperty-compatibility func sym val) grob g-context ao-context)
+  (if (func grob)
+      (ly:set-grob-property! grob sym val)))
+
+
+(define-public ((set-output-property grob-name symbol val)  grob grob-c context)
+   "Usage:
+
+\\applyoutput #(set-output-property 'Clef 'extra-offset '(0 . 1))
+
+"
+   
+   (let*
+       ((meta (ly:get-grob-property grob 'meta)))
+
+     (if (equal?  (cdr (assoc 'name meta)) grob-name)
+	 (ly:set-grob-property! grob symbol val)
+	 )))
+
+
+;;
+(define-public (smart-bar-check n)
+  "Make  a bar check that checks for a specific bar number. 
+"
+  (let*
+      (
+       (m (make-music-by-name 'ApplyContext))
+       )
+    
+    (define (checker tr)
+      (let* ((bn (ly:get-context-property tr 'currentBarNumber)))
+	(if (= bn  n)
+	    #t
+	    (error
+	     (format "Bar check failed, we should have reached ~a, instead at ~a\n"
+		     n bn ))
+	    )))
+
+    (ly:set-mus-property! m 'procedure checker)
+    m
+    ))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; warn for bare chords at start.
 
 (define (has-request-chord elts)
-  (reduce (lambda (x y) (or x y)) (map (lambda (x) (equal? (ly-music-name x)
+  (reduce (lambda (x y) (or x y)) #f (map (lambda (x) (equal? (ly:music-name x)
 							   "Request_chord")) elts)
   ))
 
-(define (ly-music-message music msg)
-  (let* (
-      (ip (ly-get-mus-property music 'origin))
+(define (ly:music-message music msg)
+  (let*
+      (
+      (ip (ly:get-mus-property music 'origin))
       )
 
-    (if (ly-input-location? ip)
-	(ly-input-message ip msg)
-	(ly-warn msg))
+    (if (ly:input-location? ip)
+	(ly:input-message ip msg)
+	(ly:warn msg))
   ))
   
 (define (check-start-chords music)
   "Check music expression for a Simultaneous_music containing notes\n(ie. Request_chords), without context specification. Called  from parser."
   
      (let*
-       ((es (ly-get-mus-property music 'elements))
-	(e (ly-get-mus-property music 'element))
-	(name (ly-music-name music)) 
+       ((es (ly:get-mus-property music 'elements))
+	(e (ly:get-mus-property music 'element))
+	(name (ly:music-name music)) 
 	)
 
        (cond 
@@ -315,29 +612,109 @@ this is not an override
 	 ((equal? name "Simultaneous_music")
 
 	  (if (has-request-chord es)
-	      (ly-music-message music "Starting score with a chord.\nPlease insert an explicit \\context before chord")
+	      (ly:music-message music "Starting score with a chord.\nPlease insert an explicit \\context before chord")
 	      (map check-start-chords es)))
 	 
 	 ((equal? name "Sequential_music")
 	   (if (pair? es)
 	       (check-start-chords (car es))))
-	  (else (if (music? e) (check-start-chords e )))
+	  (else (if (ly:music? e) (check-start-chords e )))
        
        ))
      music
      )
 
 
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+;; setting stuff for grace context.
+;;
+
+(define (vector-extend v x)
+  "Make a new vector consisting of V, with X added to the end."
+  (let*
+      ((n (vector-length v))
+       (nv (make-vector (+ n 1) '())))
+
+    
+    (vector-move-left! v 0 n nv 0)
+    (vector-set! nv n x)
+    nv))
+
+
+(define (vector-map f v)
+  "Map  F over V. This function returns nothing."
+  (do
+      ((n (vector-length v))
+       (i 0 (+ i 1)))
+      ((>= i n))
+  
+    (f (vector-ref v i))))
+
+(define (vector-reverse-map f v)
+  "Map  F over V, N to 0 order. This function returns nothing."
+  (do
+      ((i (- (vector-length v) 1) (- i 1)))
+      ((< i 0))
+  
+    (f (vector-ref v i))))
+
+;; TODO:  make a remove-grace-property too.
+(define-public (add-grace-property context-name grob sym val)
+  "Set SYM=VAL for GROB in CONTEXT-NAME. "
+  (define (set-prop context)
+    (let*
+	((where (ly:context-property-where-defined context 'graceSettings))
+	 (current (ly:get-context-property where 'graceSettings))
+	 (new-settings (vector-extend current (list context-name grob sym val)))
+	 )
+      (ly:set-context-property! where 'graceSettings new-settings)))
+    
+    (ly:export (context-spec-music (make-apply-context set-prop) 'Voice)))
+
+
+(define-public (set-start-grace-properties context)
+  (define (execute-1 x)
+    (let*
+	((tr (ly:translator-find context (car x))))
+
+      (if (ly:context? tr)
+	  (ly:context-pushpop-property tr (cadr x) (caddr x) (cadddr x))
+	  )))
+  
+  (let*
+      ((props (ly:get-context-property context 'graceSettings)))
+    (if (vector? props)
+	(vector-map execute-1 props))))
+
+(define-public (set-stop-grace-properties context)
+  (define (execute-1 x)
+    (let*
+	((tr (ly:translator-find context (car x))))
+      (if (ly:context? tr)
+	  (ly:context-pushpop-property tr (cadr x) (caddr x))
+	  )))
+  
+  (let*
+      ((props (ly:get-context-property context 'graceSettings)))
+    (if (vector? props)
+	(vector-reverse-map execute-1 props))))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; switch it on here, so parsing and init isn't checked (too slow!)
+;;
+;; automatic music transformations.
 
 (define (switch-on-debugging m)
   (set-debug-cell-accesses! 15000)
-  m
-  )
+  m)
 
-(define toplevel-music-functions
+(define-public toplevel-music-functions
   (list check-start-chords
 	voicify-music
-
+	(lambda (x) (music-map glue-mm-rest-texts x))
 ; switch-on-debugging
 	))
+
+