X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstaff-symbol-referencer.cc;h=9fbe6f8b4387c9f8838f4bcea2006447d9d9bd54;hb=c2d44e3a71b2d031305abede97a53f6e5fcf832b;hp=8126bbbcf172cb47855cb1f623cce71a513b35e9;hpb=dd36ce6e97590323a7b6a61eb4a3f08d265c5b6e;p=lilypond.git diff --git a/lily/staff-symbol-referencer.cc b/lily/staff-symbol-referencer.cc index 8126bbbcf1..9fbe6f8b43 100644 --- a/lily/staff-symbol-referencer.cc +++ b/lily/staff-symbol-referencer.cc @@ -1,161 +1,179 @@ -/* +/* staff-symbol-referencer.cc -- implement Staff_symbol_referencer - + source file of the GNU LilyPond music typesetter - - (c) 1999--2000 Han-Wen Nienhuys - */ + + (c) 1999--2004 Han-Wen Nienhuys +*/ #include #include "staff-symbol-referencer.hh" #include "staff-symbol.hh" -#include "paper-def.hh" -#include "dimension-cache.hh" +#include "output-def.hh" +#include "libc-extension.hh" + -Staff_symbol_referencer_interface::Staff_symbol_referencer_interface (Score_element const *sc) +int +Staff_symbol_referencer::line_count (Grob *me) { - elt_l_ = (Score_element*)sc; + Grob *st = get_staff_symbol (me); + return st ? Staff_symbol::line_count (st) : 0; } -void -Staff_symbol_referencer_interface::set_interface () +bool +Staff_symbol_referencer::on_staffline (Grob *me) { - elt_l_->set_elt_property ("staff-position", gh_double2scm (0.0)); - elt_l_->add_offset_callback (callback, Y_AXIS); - + return on_staffline (me, (int) rint (get_position (me))); } - +/* + This does not take size into account. + maybe rename: on_virtual_staffline, on_staff_or_ledger_line? + */ bool -Staff_symbol_referencer_interface::has_interface_b () +Staff_symbol_referencer::on_staffline (Grob *me, int pos) { - return unsmob_element (elt_l_->get_elt_property ("staff-symbol")) - || gh_number_p (elt_l_->get_elt_property ("staff-position")); + int sz = line_count (me) - 1; + return ((pos + sz) % 2) == 0; } - -int -Staff_symbol_referencer_interface::line_count () const +Grob* +Staff_symbol_referencer::get_staff_symbol (Grob *me) { - Staff_symbol *st = staff_symbol_l (); - return st ? st->line_count () : 0; + if (Staff_symbol::has_interface (me)) + return me; + + SCM st = me->get_property ("staff-symbol"); + return unsmob_grob (st); } -Staff_symbol* -Staff_symbol_referencer_interface::staff_symbol_l () const +Real +Staff_symbol_referencer::staff_space (Grob *me) { - SCM st = elt_l_->get_elt_property ("staff-symbol"); - return dynamic_cast (unsmob_element(st)); + Grob *st = get_staff_symbol (me); + if (st) + return Staff_symbol::staff_space (st); + return 1.0; } Real -Staff_symbol_referencer_interface::staff_space () const +Staff_symbol_referencer::line_thickness (Grob *me) { - Staff_symbol * st = staff_symbol_l (); + Grob *st = get_staff_symbol (me); if (st) - return st->staff_space (); - else if (elt_l_->pscore_l_ && elt_l_->paper_l ()) - return elt_l_->paper_l ()->get_var ("interline"); - - return 0.0; + return Staff_symbol::get_line_thickness (st); + return me->get_paper ()->get_dimension (ly_symbol2scm ("linethickness")); } - Real -Staff_symbol_referencer_interface::position_f () const +Staff_symbol_referencer::get_position (Grob *me) { - Real p =0.0; - Staff_symbol * st = staff_symbol_l (); - Score_element * c = st ? elt_l_->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 = elt_l_->relative_coordinate (c, Y_AXIS) + Real y = me->relative_coordinate (c, Y_AXIS) - st->relative_coordinate (c, Y_AXIS); - p += 2.0 * y / st->staff_space (); + p += 2.0 * y / Staff_symbol::staff_space (st); + return p; } - else + else if (!st) { - SCM pos = elt_l_->get_elt_property ("staff-position"); - if (gh_number_p (pos)) - return gh_scm2double (pos); + return me->relative_coordinate (me->get_parent (Y_AXIS), Y_AXIS) * 2; } - - return p; + return robust_scm2double (me->get_property ("staff-position"), p); +} + +int +Staff_symbol_referencer::get_rounded_position (Grob*me) +{ + return int (rint (get_position (me))); } +LY_DEFINE (ly_grob_staff_position, "ly:grob-staff-position", + 1, 0,0, (SCM sg), + "Return the Y-position of @var{sg} relative to the staff.") +{ + Grob *g = unsmob_grob (sg); + SCM_ASSERT_TYPE (g, sg, SCM_ARG1, __FUNCTION__, "grob"); + Real pos = Staff_symbol_referencer::get_position (g); -/* - should use offset callback! - */ -Real -Staff_symbol_referencer_interface::callback (Dimension_cache const * c) + if (fabs (rint (pos) -pos) < 1e-6) // ugh. + return scm_int2num ((int) my_round (pos)); + else + return scm_make_real (pos); +} + + +/* should use offset callback! */ +MAKE_SCHEME_CALLBACK (Staff_symbol_referencer,callback,2); +SCM +Staff_symbol_referencer::callback (SCM element_smob, SCM) { - Score_element * sc = dynamic_cast (c->element_l ()); + Grob *me = unsmob_grob (element_smob); - - SCM pos = sc->get_elt_property ("staff-position"); - Real off =0.0; - if (gh_number_p (pos)) + SCM pos = me->get_property ("staff-position"); + Real off = 0.0; + if (ly_c_number_p (pos)) { - Real space = staff_symbol_referencer (sc).staff_space (); - off = gh_scm2double (pos) * space/2.0; + Real space = Staff_symbol_referencer::staff_space (me); + off = ly_scm2double (pos) * space / 2.0; + me->set_property ("staff-position", scm_int2num (0)); } - sc->set_elt_property ("staff-position", gh_double2scm (0.0)); - return off; + return scm_make_real (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_interface::set_position (Real p) +Staff_symbol_referencer::set_position (Grob *me, Real p) { - Staff_symbol * st = staff_symbol_l (); - if (st && elt_l_->common_refpoint(st, Y_AXIS)) + Grob *st = get_staff_symbol (me); + if (st && me->common_refpoint (st, Y_AXIS)) { - Real oldpos = position_f (); - elt_l_->set_elt_property ("staff-position", gh_double2scm (p - oldpos)); + Real oldpos = get_position (me); + me->set_property ("staff-position", scm_make_real (p - oldpos)); } else - { - elt_l_->set_elt_property ("staff-position", - gh_double2scm (p)); - - } - - if (elt_l_->has_offset_callback_b (callback, Y_AXIS)) - return ; + me->set_property ("staff-position", scm_make_real (p)); - elt_l_->add_offset_callback (callback, Y_AXIS); + me->add_offset_callback (Staff_symbol_referencer::callback_proc, Y_AXIS); } -Staff_symbol_referencer_interface -staff_symbol_referencer (Score_element const*e) +/* Half of the height, in staff space, i.e. 2.0 for a normal staff. */ +Real +Staff_symbol_referencer::staff_radius (Grob *me) { - return e; // gee, I'm so smart! + 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) { - Staff_symbol_referencer_interface s1(a); - Staff_symbol_referencer_interface s2(b); - - return sign(s1.position_f () - s2.position_f ()); + return sign (Staff_symbol_referencer::get_position ((Grob*)a) + - Staff_symbol_referencer::get_position ((Grob*) b)); } + +ADD_INTERFACE (Staff_symbol_referencer,"staff-symbol-referencer-interface", + "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}. " + , + "staff-position"); +