X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstaff-symbol-referencer.cc;h=7fe0bf3131679d75ad7aa456547719430f103c1d;hb=a7c719415cae938b6b0aff98e72eab5e5366c5a3;hp=b67c577954ceac377f443636cdd4fa4778f47cb0;hpb=0af2486a28f1c60b9de929a9101964d880927e54;p=lilypond.git diff --git a/lily/staff-symbol-referencer.cc b/lily/staff-symbol-referencer.cc index b67c577954..7fe0bf3131 100644 --- a/lily/staff-symbol-referencer.cc +++ b/lily/staff-symbol-referencer.cc @@ -1,151 +1,174 @@ -/* +/* staff-symbol-referencer.cc -- implement Staff_symbol_referencer - + source file of the GNU LilyPond music typesetter - - (c) 1999--2000 Han-Wen Nienhuys - */ -#include + (c) 1999--2006 Han-Wen Nienhuys +*/ #include "staff-symbol-referencer.hh" -#include "staff-symbol.hh" -#include "paper-def.hh" - +#include "staff-symbol.hh" +#include "grob.hh" +#include "output-def.hh" +#include "libc-extension.hh" +int +Staff_symbol_referencer::line_count (Grob *me) +{ + Grob *st = get_staff_symbol (me); + return st ? Staff_symbol::line_count (st) : 0; +} -void -Staff_symbol_referencer::set_interface (Score_element * e) +bool +Staff_symbol_referencer::on_line (Grob *me) { - if (!gh_number_p (e->get_elt_property ("staff-position"))) - e->set_elt_property ("staff-position", gh_double2scm (0.0)); - - e->add_offset_callback (callback, Y_AXIS); + return on_line (me, (int) rint (get_position (me))); } bool -Staff_symbol_referencer::has_interface (Score_element*e) +Staff_symbol_referencer::on_staff_line (Grob *me) { - return unsmob_element (e->get_elt_property ("staff-symbol")) - || gh_number_p (e->get_elt_property ("staff-position")); + return on_staff_line (me, (int) rint (get_position (me))); } +bool +Staff_symbol_referencer::on_line (Grob *me, int pos) +{ + int sz = line_count (me) - 1; + return ((pos + sz) % 2) == 0; +} -int -Staff_symbol_referencer::line_count (Score_element*me) +bool +Staff_symbol_referencer::on_staff_line (Grob *me, int pos) { - Score_element *st = staff_symbol_l (me); - return st ? Staff_symbol::line_count (st) : 0; + return on_line (me, pos) && abs (pos) <= 2 * staff_radius (me); } -Score_element* -Staff_symbol_referencer::staff_symbol_l (Score_element*me) +Grob * +Staff_symbol_referencer::get_staff_symbol (Grob *me) { - SCM st = me->get_elt_property ("staff-symbol"); - return unsmob_element(st); + if (Staff_symbol::has_interface (me)) + return me; + + SCM st = me->get_object ("staff-symbol"); + return unsmob_grob (st); } Real -Staff_symbol_referencer::staff_space (Score_element*me) +Staff_symbol_referencer::staff_space (Grob *me) { - Score_element * st = staff_symbol_l (me); + Grob *st = get_staff_symbol (me); if (st) return Staff_symbol::staff_space (st); - else if (me->pscore_l_ && me->paper_l ()) - return me->paper_l ()->get_var ("interline"); - - return 0.0; + return 1.0; } +Real +Staff_symbol_referencer::line_thickness (Grob *me) +{ + 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::position_f (Score_element*me) +Staff_symbol_referencer::get_position (Grob *me) { - Real p =0.0; - Score_element * st = staff_symbol_l (me); - Score_element * c = st ? me->common_refpoint (st, Y_AXIS) : 0; + Real p = 0.0; + Grob *st = get_staff_symbol (me); + Grob *c = st ? me->common_refpoint (st, Y_AXIS) : 0; if (st && c) { Real y = me->relative_coordinate (c, Y_AXIS) - st->relative_coordinate (c, Y_AXIS); p += 2.0 * y / Staff_symbol::staff_space (st); + return p; } - else - { - SCM pos = me->get_elt_property ("staff-position"); - if (gh_number_p (pos)) - return gh_scm2double (pos); - } - - 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); } +int +Staff_symbol_referencer::get_rounded_position (Grob *me) +{ + return int (rint (get_position (me))); +} - -/* - should use offset callback! - */ -Real -Staff_symbol_referencer::callback (Score_element * sc,Axis ) +MAKE_SCHEME_CALLBACK (Staff_symbol_referencer, callback, 1); +SCM +Staff_symbol_referencer::callback (SCM smob) { - Score_element* me = (Score_element*)sc; // UGH. - - SCM pos = sc->get_elt_property ("staff-position"); - Real off =0.0; - if (gh_number_p (pos)) + 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 (sc); - off = gh_scm2double (pos) * space/2.0; + Real space = Staff_symbol_referencer::staff_space (me); + off = scm_to_double (pos) * space / 2.0; } - me->set_elt_property ("staff-position", gh_double2scm (0.0)); - - return off; + return scm_from_double (off); } -/* - - This sets the position relative to the center of the staff symbol. +/* This sets the position relative to the center of the staff symbol. - The function is hairy, because it can be callled in two situations: +The function is hairy, because it can be called in two situations: - 1. There is no staff yet; we must set staff-position +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 */ - 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 (Score_element*me,Real p) +Staff_symbol_referencer::set_position (Grob *me, Real p) { - Score_element * st = staff_symbol_l (me); - if (st && me->common_refpoint(st, Y_AXIS)) + Grob *st = get_staff_symbol (me); + Real oldpos = 0.0; + if (st && me->common_refpoint (st, Y_AXIS)) { - Real oldpos = position_f (me); - me->set_elt_property ("staff-position", gh_double2scm (p - oldpos)); + oldpos = get_position (me); } - else - { - me->set_elt_property ("staff-position", - gh_double2scm (p)); - } - - if (me->has_offset_callback_b (callback, Y_AXIS)) - return ; - - me->add_offset_callback (callback, Y_AXIS); + + 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 (Score_element *const &a, Score_element * const &b) +compare_position (Grob *const &a, Grob *const &b) { - return sign (Staff_symbol_referencer::position_f((Score_element*)a) - - Staff_symbol_referencer::position_f((Score_element*)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"); +