On Mon, Jul 20, 2009 at 11:05:27AM +0200, Bertalan Fodor (LilyPondTool) wrote:
> Would it be theoretically possible to include other metadata in the
> point-and-click url besides the input file position?
> I'm looking at:
>
> (define (grob-cause offset grob
>
> I'm not sure, how much information is included in that grob object.
>
> If a text script for example would have the information that it is a
> Voice.TextScript, or that the notehead it is coming from a note event it
> would allow powerful finishing tools, like extra-offset, adding
> transposition in the editors.
Yes, you can get more information from grob-cause.
A quick inspection with GDB reveals this cause for a NoteHead grob
(indented for easier reading) in a particular file I have:
(cause
. #<Prob: Stream_event C++: Stream_event
((music-cause
. #<Prob: Music C++: Music
((length . #<Mom 1/4>)
(elements)
(duration . #<Duration 4 >)
(pitch . #<Pitch a >)
(origin . #<location test.ly:34:33>))
((display-methods #<procedure #f (note parser)>)
(name . NoteEvent)
(types general-music
event
note-event
rhythmic-event
melodic-event))>)
(length . #<Mom 1/4>)
(elements)
(duration . #<Duration 4 >)
(pitch . #<Pitch a >)
(origin . #<location test.ly:34:33>))
((class . note-event))>)
Hopefully that will give you some ideas about using grob-cause. :-)
-Patrick
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