X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstaff-symbol-referencer.cc;h=604eac7b3d837625d04012a2c9cb68aadb3e8006;hb=6ac8e1b2d7640826ae251e040de5efbc36da68ab;hp=f2532f0d43e0cbda93eef0d2356e565a8f7d4ef0;hpb=01d84d552854fb399bd0e819502c6c2db2a1b214;p=lilypond.git diff --git a/lily/staff-symbol-referencer.cc b/lily/staff-symbol-referencer.cc index f2532f0d43..604eac7b3d 100644 --- a/lily/staff-symbol-referencer.cc +++ b/lily/staff-symbol-referencer.cc @@ -3,7 +3,7 @@ source file of the GNU LilyPond music typesetter - (c) 1999 Han-Wen Nienhuys + (c) 1999--2003 Han-Wen Nienhuys */ #include @@ -11,99 +11,170 @@ #include "staff-symbol-referencer.hh" #include "staff-symbol.hh" #include "paper-def.hh" -#include "dimension-cache.hh" +#include "libc-extension.hh" -Staff_symbol_referencer::Staff_symbol_referencer () + +int +Staff_symbol_referencer::line_count (Grob*me) { - set_elt_property ("staff-position", gh_double2scm (0.0)); - dim_cache_[Y_AXIS]->off_callbacks_.push (callback); + Grob *st = get_staff_symbol (me); + return st ? Staff_symbol::line_count (st) : 0; } +bool +Staff_symbol_referencer::on_staffline (Grob*me) +{ + return on_staffline (me, (int) rint (get_position (me))); +} -int -Staff_symbol_referencer::lines_i () const +bool +Staff_symbol_referencer::on_staffline (Grob*me, int pos) { - Staff_symbol *st = staff_symbol_l (); - return st ? st->no_lines_i_ : 5; + int sz = line_count (me)-1; + return ((pos + sz) % 2) == 0; } -Staff_symbol* -Staff_symbol_referencer::staff_symbol_l () const +Grob* +Staff_symbol_referencer::get_staff_symbol (Grob*me) { - SCM st = get_elt_property ("staff-symbol"); - return dynamic_cast (unsmob_element(st)); + SCM st = me->get_grob_property ("staff-symbol"); + return unsmob_grob (st); } Real -Staff_symbol_referencer::staff_line_leading_f () const +Staff_symbol_referencer::staff_space (Grob*me) { - Staff_symbol * st = staff_symbol_l (); + Grob * st = get_staff_symbol (me); if (st) - return st->staff_line_leading_f_; - else if (pscore_l_ && paper_l ()) - paper_l ()->get_var ("interline"); - - return 0.0; + return Staff_symbol::staff_space (st); + + 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->get_paper ()->get_realvar (ly_symbol2scm ("linethickness")); +} Real -Staff_symbol_referencer::position_f () const +Staff_symbol_referencer::get_position (Grob*me) { Real p =0.0; - SCM pos = get_elt_property ("staff-position"); - if (gh_number_p (pos)) - p = gh_scm2double (pos); - - Staff_symbol * st = staff_symbol_l (); - if (st) + Grob * st = get_staff_symbol (me); + Grob * c = st ? me->common_refpoint (st, Y_AXIS) : 0; + if (st && c) { - Score_element * c = common_refpoint (st, Y_AXIS); - Real y = 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; + + return robust_scm2double ( me->get_grob_property ("staff-position"), p); } +LY_DEFINE(ly_grob_staff_position, + "ly:grob-staff-position", + 1, 0,0, (SCM sg), + "Return the Y-position of this grob 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); + + if (fabs (rint (pos) -pos) < 1e-6) // ugh. + return gh_int2scm ((int) my_round (pos)); + else + return gh_double2scm (pos); +} + /* should use offset callback! */ -Real -Staff_symbol_referencer::callback (Dimension_cache const * c) +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 ()); - Staff_symbol_referencer * ref = dynamic_cast (sc); - SCM pos = sc->get_elt_property ("staff-position"); + Grob *me = unsmob_grob (element_smob); + + SCM pos = me->get_grob_property ("staff-position"); Real off =0.0; if (gh_number_p (pos)) { - off = gh_scm2double (pos) * ref->staff_line_leading_f () /2.0; + Real space = Staff_symbol_referencer::staff_space (me); + off = gh_scm2double (pos) * space/2.0; + me->set_grob_property ("staff-position", gh_int2scm (0)); } - sc->set_elt_property ("staff-position", gh_double2scm (0.0)); - return off; + return gh_double2scm (off); } + /* + + This sets the position relative to the center of the staff symbol. + + The function is hairy, because it can be callled 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; - - translate_axis (- halfspace * position_f (), Y_AXIS); - Staff_symbol *st = staff_symbol_l (); - if (st) - translate_axis (halfspace * p, Y_AXIS); + Grob * st = get_staff_symbol (me); + if (st && me->common_refpoint (st, Y_AXIS)) + { + Real oldpos = get_position (me); + me->set_grob_property ("staff-position", gh_double2scm (p - oldpos)); + } else { - // SCM pos = get_elt_property ("staff-position"); - set_elt_property ("staff-position", - gh_double2scm (p)); - // gh_double2scm (p + gh_scm2double (pos))); + me->set_grob_property ("staff-position", + gh_double2scm (p)); + } + + if (me->has_offset_callback_b (Staff_symbol_referencer::callback_proc, Y_AXIS)) + return ; + + me->add_offset_callback (Staff_symbol_referencer::callback_proc, 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)); } +ADD_INTERFACE (Staff_symbol_referencer,"staff-symbol-referencer-interface", + "Object whose Y position is meaning with reference to a staff " +"symbol. Objects that have this interface should include " +"Staff_symbol_referencer::callback in their Y-offset-callback. " +, + "staff-position");