ly/graphviz-init.ly

   1 \version "2.12.0"
   2
   3 #(use-modules (scm graphviz))
   4
   5 #(define last-grob-action '())
   6
   7 #(define sym-blacklist '())
   8 #(define sym-whitelist '())
   9
  10 #(define file-line-blacklist '())
  11 #(define file-line-whitelist '())
  12
  13 #(define grob-blacklist '())
  14 #(define grob-whitelist '())
  15
  16 #(define (blacklist-symbol sym)
  17   (set! sym-blacklist (cons sym sym-blacklist)))
  18
  19 #(define (whitelist-symbol sym)
  20   (set! sym-whitelist (cons sym sym-whitelist)))
  21
  22 #(define (whitelist-grob str)
  23   (set! grob-whitelist (cons str grob-whitelist)))
  24
  25 #(define graph (make-empty-graph (ly:parser-output-name parser)))
  26
  27 #(define (grob-name g)
  28   (let* ((meta (ly:grob-property g 'meta))
  29          (name-pair (assq 'name meta)))
  30    (if (pair? name-pair)
  31        (cdr name-pair)
  32        #f)))
  33
  34 % an event is relevant if
  35 % (it is on some whitelist or all whitelists are empty)
  36 % and
  37 % (it isn't on any blacklist)
  38
  39 #(define (relevant? grob file line prop)
  40   (let ((file-line `(,file . ,line)))
  41    (and
  42     (or
  43      (= 0 (length file-line-whitelist) (length sym-whitelist) (length grob-whitelist))
  44      (memq prop sym-whitelist)
  45      (memq (grob-name grob) grob-whitelist)
  46      (member file-line file-line-whitelist))
  47     (and
  48      (not (memq prop sym-blacklist))
  49      (not (memq (grob-name grob) grob-blacklist))
  50      (not (member file-line file-line-blacklist))))))
  51
  52 #(define (grob-event-node grob label cluster)
  53   (let ((node-id (add-node graph label cluster))
  54         (prev (assv grob last-grob-action)))
  55    (if (pair? prev)
  56        (add-edge graph (cdr prev) node-id))
  57    (set! last-grob-action (assv-set! last-grob-action grob node-id))))
  58
  59 #(define (truncate-value val)
  60   (let ((val-str (format "~a" val)))
  61    (string-take val-str (min 50 (string-length val-str)))))
  62
  63 #(define (grob-mod grob file line func prop val)
  64   (let* ((val-str (truncate-value val))
  65          (label (format "~a\\n~a:~a\\n~a <- ~a" (grob-name grob) file line prop val-str)))
  66    (if (relevant? grob file line prop)
  67        (grob-event-node grob label file))))
  68
  69 #(define (grob-cache grob prop callback value)
  70   (let* ((val-str (truncate-value value))
  71          (label (format "caching ~a.~a\\n~a -> ~a" (grob-name grob) prop callback value)))
  72    (if (relevant? grob #f #f prop)
  73        (grob-event-node grob label #f))))
  74
  75 #(define (grob-create grob file line func)
  76   (let ((label (format "~a\\n~a:~a" (grob-name grob) file line)))
  77    (grob-event-node grob label file)))
  78
  79 #(ly:set-grob-modification-callback grob-mod)
  80 #(ly:set-property-cache-callback grob-cache)
  81 %#(ly:set-grob-creation-callback grob-create)