Re: Lyrics break estimation of vertical spacing

[Boris Shingarov]

On Fri, 19 Mar 2010 17:15:08 -0400, Boris Shingarov  wrote:
  
 >  As to the call to get_skylines(), now I am really confused.  All this
 >  (get_property("springs-and-rods") resulting in
 >  Spacing_spanner::set_springs() and all the other things down the road
 >  being called), happens much earlier than thewhole page layout stage --
 >  I guess the Y-extent property is stored inside the grob at this earlier
 >  stage?

 Ok, now I understand what's going on here: the get_skylines() does get
 called much earlier in the game, but it also is called during
 Constrained_breaking::fill_line_details(), the Y-extent function of the
 system is the one from Axis_group_interface; that iterates over all
 spanners calculating their pure_height(), that goes through another
 layer of Axis_group_interface, and that one finaly reaches the
 Align_interface.
  
 What this tree of grobs looks like, and what is each grob, I am not
 sure how to tell.