Imported sources

[lilypond.git] / scm / bass-figure.scm

diff --git a/scm/bass-figure.scm b/scm/bass-figure.scm
index 2753dc5e11852e9fd6f95bffc5aed23d244642a3..9c72b95ed07977e162df4e8bf7d372433aa6be81 100644 (file)
--- a/scm/bass-figure.scm
+++ b/scm/bass-figure.scm
@@ -1,92 +1,65 @@
 ;;;; figured bass support ...
 
-;;;; todo: make interfaces as 1st level objects in LilyPond.
+(ly:add-interface
+'bass-figure-interface
+ "A bass figure, including bracket"
+ '())
 
-(define (brew-one-figure grob fig-music)
-  "Brew a single column for a music figure"
-  (let* (
-        (chain (Font_interface::get_property_alist_chain grob))
-        (mf (ly:get-font grob (cons  '((font-family . music) (font-magnification . 0.8))
-                                     chain 
-                                     )))
-        (nf (ly:get-font grob
-                         (cons '((font-family . number))
-                               chain)))
-        (mol (ly:make-molecule  '() '(0 . 0) '(0 . 1.0)))
+(define  (recursive-split-at pred? l)
+  (if (null? l)
+      '()
+      (let*
+         ((x (split-at-predicate pred? l)))
+       (set-cdr! x (recursive-split-at pred? (cdr x)))
+       x
+       )))
+
+(define-public (make-bass-figure-markup figures context)
+  
+  (define (no-end-bracket? f1 f2)
+    (eq? (ly:get-mus-property f1 'bracket-stop) '())
+    )
+  (define (no-start-bracket? f1 f2)
+    (eq? (ly:get-mus-property f2 'bracket-start) '())
+    )
+
+  ;; TODO: support slashed numerals here.
+  (define (fig-to-markup fig-music)
+    (let*
+       ((align-accs (eq? #t (ly:get-context-property context 'alignBassFigureAccidentals)))
         (fig  (ly:get-mus-property fig-music 'figure))
         (acc  (ly:get-mus-property fig-music 'alteration))
-        )
-    
-    (if (number? fig)
-       (begin
-         (set! mol   (fontify-text nf (number->string fig)))
-         (ly:molecule-align-to! mol Y CENTER)
-       ))
-    
-    (if (number? acc)
-       (set! mol
-             (ly:molecule-combine-at-edge
-              mol X RIGHT (ly:find-glyph-by-name mf (string-append "accidentals-" (number->string acc)))
-              0.2))
-       )
-    (if (ly:molecule? mol)
-       (ly:molecule-align-to! mol X CENTER)
-       )
-    mol))
+        (acc-markup #f)
+        (fig-markup
+         (if (string? fig)
+             (make-simple-markup fig)
+             (if align-accs (make-simple-markup " ")
+                 (if (not (eq? acc '()))
+                     (make-simple-markup "")
+                     (make-strut-markup)))
+             )))
 
-(define (brew-bass-figure grob)
-  "Make a molecule for a Figured Bass grob"
-  (let* (
-        (figs (ly:get-grob-property grob 'causes ))
-        (mol (ly:make-molecule '() '(0 . 0) '(0 . 0)))
-        (padding (ly:get-grob-property grob 'padding))
-        (kerning (ly:get-grob-property grob 'kern))
-        (thickness (*
-                    (ly:get-paper-variable grob 'linethickness)
-                    (ly:get-grob-property grob 'thickness))
-                   )
-        (dir (ly:get-grob-property grob 'direction))
+      (if (number? acc)
+         (make-line-markup (list fig-markup
+                                 (alteration->text-accidental-markup acc)))
+         fig-markup)
+      ))
+  
+  (define (fig-seq-to-markup figs)
+    (let*
+       (
+        (c (make-dir-column-markup (map fig-to-markup figs)))
         )
-
-    (define (brew-complete-figure grob figs mol)
-      "recursive function: take some stuff from FIGS, and add it to MOL." 
-      (define (end-bracket? fig)
-       (eq? (ly:get-mus-property fig 'bracket-stop) #t)
-       )
-      
-      (if (null? figs)
-         mol
-         (if (eq? (ly:get-mus-property (car figs) 'bracket-start) #t)
-             (let* (
-                    (gather-todo (take-from-list-until figs '() end-bracket?))
-                    (unbr-mols
-                     (map
-                      (lambda (x) (brew-one-figure grob x))
-                      (reverse! (car gather-todo) '())))
-                    (br-mol (bracketify-molecule
-                             (stack-molecules Y dir kerning unbr-mols)
-                             Y thickness (* 2 padding) padding))
-                    )
-               (brew-complete-figure
-                grob (cdr gather-todo)
-                (ly:molecule-combine-at-edge mol Y dir br-mol kerning)
-                )
-               )
-             (brew-complete-figure
-              grob (cdr figs)
-              (ly:molecule-combine-at-edge mol Y dir (brew-one-figure grob (car figs))
-                                           kerning))
-             )
-         ))
-
-    
-    (set! mol (brew-complete-figure grob (reverse figs) mol))
-    (ly:molecule-align-to! mol Y (- dir))
-    mol
+      (if (eq? (ly:get-mus-property (car figs) 'bracket-start) #t)
+         (make-bracket-markup c)
+         c
+         )))
+  
+  (let*
+      (
+       (ends (recursive-split-at no-end-bracket? (reverse figures)))
+       (starts (map (lambda (x) (recursive-split-at no-start-bracket? x)) ends))
+       )
+    (make-dir-column-markup (map fig-seq-to-markup (apply append starts)))
     ))
 
-
-(ly:add-interface
-'bass-figure-interface
- "A bass figure, including bracket"
- '(padding thickness direction))