X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstaff-symbol-referencer.cc;h=53637c86e5f1bd8fadc39ece6ee3dec4fdbc0f87;hb=2a00c69a012d4ccaf24a036bdb5ac9ea43fb9604;hp=22b29af5397857dab5258a1f9dd9daaf2d13aeb7;hpb=59e4ae99bad964d00dc167919779301c5ec2a535;p=lilypond.git diff --git a/lily/staff-symbol-referencer.cc b/lily/staff-symbol-referencer.cc index 22b29af539..53637c86e5 100644 --- a/lily/staff-symbol-referencer.cc +++ b/lily/staff-symbol-referencer.cc @@ -1,100 +1,194 @@ -/* +/* staff-symbol-referencer.cc -- implement Staff_symbol_referencer - + source file of the GNU LilyPond music typesetter - - (c) 1999 Han-Wen Nienhuys - */ -#include + (c) 1999--2007 Han-Wen Nienhuys +*/ #include "staff-symbol-referencer.hh" + #include "staff-symbol.hh" -#include "paper-def.hh" -#include "dimension-cache.hh" +#include "grob.hh" +#include "output-def.hh" +#include "libc-extension.hh" -Staff_symbol_referencer::Staff_symbol_referencer () +int +Staff_symbol_referencer::line_count (Grob *me) { - staff_symbol_l_ =0; - position_f_ =0; + Grob *st = get_staff_symbol (me); + return st ? Staff_symbol::line_count (st) : 0; } -void -Staff_symbol_referencer::do_substitute_element_pointer (Score_element *o, - Score_element*n) +bool +Staff_symbol_referencer::on_line (Grob *me) { - if (staff_symbol_l_ == o) - { - staff_symbol_l_ = dynamic_cast (n); - } + return on_line (me, (int) rint (get_position (me))); } -int -Staff_symbol_referencer::lines_i () const +bool +Staff_symbol_referencer::on_staff_line (Grob *me) { - return (staff_symbol_l_) ? staff_symbol_l_->no_lines_i_ : 5; + return on_staff_line (me, (int) rint (get_position (me))); } -void -Staff_symbol_referencer::set_staff_symbol (Staff_symbol*s) +bool +Staff_symbol_referencer::on_line (Grob *me, int pos) { - staff_symbol_l_ =s; - add_dependency (s); + int sz = line_count (me) - 1; + return ((pos + sz) % 2) == 0; } -Staff_symbol* -Staff_symbol_referencer::staff_symbol_l () const +bool +Staff_symbol_referencer::on_staff_line (Grob *me, int pos) { - return staff_symbol_l_; + return on_line (me, pos) && abs (pos) <= 2 * staff_radius (me); +} + +Grob * +Staff_symbol_referencer::get_staff_symbol (Grob *me) +{ + if (Staff_symbol::has_interface (me)) + return me; + + SCM st = me->get_object ("staff-symbol"); + return unsmob_grob (st); } Real -Staff_symbol_referencer::staff_line_leading_f () const +Staff_symbol_referencer::staff_space (Grob *me) { - if (staff_symbol_l_) - return staff_symbol_l_->staff_line_leading_f_; - else if (pscore_l_ && paper_l ()) - paper_l ()->get_var ("interline"); - - return 0.0; + Grob *st = get_staff_symbol (me); + if (st) + return Staff_symbol::staff_space (st); + return 1.0; } Real -Staff_symbol_referencer::position_f () const +Staff_symbol_referencer::line_thickness (Grob *me) { - Real p = position_f_; - if (staff_symbol_l_ ) + Grob *st = get_staff_symbol (me); + if (st) + return Staff_symbol::get_line_thickness (st); + return me->layout ()->get_dimension (ly_symbol2scm ("line-thickness")); +} + +Real +Staff_symbol_referencer::get_position (Grob *me) +{ + Real p = 0.0; + Grob *st = get_staff_symbol (me); + Grob *c = st ? me->common_refpoint (st, Y_AXIS) : 0; + if (st && c) { - Graphical_element * c = common_refpoint (staff_symbol_l_, Y_AXIS); - Real y = relative_coordinate (c, Y_AXIS) - staff_symbol_l_->relative_coordinate (c, Y_AXIS); + Real y = me->relative_coordinate (c, Y_AXIS) + - st->relative_coordinate (c, Y_AXIS); - p += 2.0 * y / staff_line_leading_f (); + p += 2.0 * y / Staff_symbol::staff_space (st); + return p; } - return p; + else if (!st) + return me->relative_coordinate (me->get_parent (Y_AXIS), Y_AXIS) * 2; + return robust_scm2double (me->get_property ("staff-position"), p); } +Interval +Staff_symbol_referencer::extent_in_staff (Grob *me) +{ + Grob *st = get_staff_symbol (me); + Grob *c = st ? me->common_refpoint (st, Y_AXIS) : 0; -/* - should use offset callback! - */ -void -Staff_symbol_referencer::do_pre_processing () + Interval retval; + if (st && c) + { + retval = me->extent (c, Y_AXIS) + - st->relative_coordinate (c, Y_AXIS); + } + + return retval; +} + + + +int +Staff_symbol_referencer::get_rounded_position (Grob *me) +{ + return int (rint (get_position (me))); +} + +MAKE_SCHEME_CALLBACK (Staff_symbol_referencer, callback, 1); +SCM +Staff_symbol_referencer::callback (SCM smob) { - translate_axis (position_f_ * staff_line_leading_f () /2.0, Y_AXIS); - position_f_ =0; + Grob *me = unsmob_grob (smob); + + SCM pos = me->get_property ("staff-position"); + Real off = 0.0; + if (scm_is_number (pos)) + { + Real space = Staff_symbol_referencer::staff_space (me); + off = scm_to_double (pos) * space / 2.0; + } + + return scm_from_double (off); } +/* This sets the position relative to the center of the staff symbol. + +The function is hairy, because it can be called in two situations: + +1. There is no staff yet; we must set staff-position + +2. There is a staff, and perhaps someone even applied a +translate_axis (). Then we must compensate for the translation + +In either case, we set a callback to be sure that our new position +will be extracted from staff-position */ void -Staff_symbol_referencer::set_position (Real p) +Staff_symbol_referencer::set_position (Grob *me, Real p) { - Real halfspace = staff_line_leading_f ()* 0.5; + Grob *st = get_staff_symbol (me); + Real oldpos = 0.0; + if (st && me->common_refpoint (st, Y_AXIS)) + { + oldpos = get_position (me); + } + - translate_axis (- halfspace * position_f (), Y_AXIS); - if (staff_symbol_l_) - translate_axis (halfspace * p, Y_AXIS); - else - position_f_ = p; + Real ss = Staff_symbol_referencer::staff_space (me); + me->translate_axis ((p - oldpos) * ss * 0.5, Y_AXIS); } +/* Half of the height, in staff space, i.e. 2.0 for a normal staff. */ +Real +Staff_symbol_referencer::staff_radius (Grob *me) +{ + return (line_count (me) - 1) / 2.0; +} + +int +compare_position (Grob *const &a, Grob *const &b) +{ + return sign (Staff_symbol_referencer::get_position ((Grob *)a) + - Staff_symbol_referencer::get_position ((Grob *) b)); +} + +bool +position_less (Grob *const &a, Grob *const &b) +{ + return Staff_symbol_referencer::get_position (a) + < Staff_symbol_referencer::get_position (b); +} + +ADD_INTERFACE (Staff_symbol_referencer, + "An object whose Y position is meant relative to a staff " + "symbol. " + "These usually have @code{Staff_symbol_referencer::callback} " + "in their @code{Y-offset-callbacks}. ", + + /* properties */ + "staff-position"); + +