X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstaff-symbol-referencer.cc;h=09b3d2856ec5405162e50f58e817a2e784933cce;hb=38d60f8d090d915c34f5d4e6361bf86e75858f0d;hp=aad498bce3b24fb009e90d10c773adf3e5814764;hpb=07d4d05df6479d58c3c5152c07d7c86b94ee98b4;p=lilypond.git diff --git a/lily/staff-symbol-referencer.cc b/lily/staff-symbol-referencer.cc index aad498bce3..09b3d2856e 100644 --- a/lily/staff-symbol-referencer.cc +++ b/lily/staff-symbol-referencer.cc @@ -1,66 +1,240 @@ -/* - staff-symbol-referencer.cc -- implement Staff_symbol_referencer - - source file of the GNU LilyPond music typesetter - - (c) 1999 Han-Wen Nienhuys - */ +/* + This file is part of LilyPond, the GNU music typesetter. -#include + Copyright (C) 1999--2015 Han-Wen Nienhuys + + LilyPond is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + LilyPond is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with LilyPond. If not, see . +*/ #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" + +int +Staff_symbol_referencer::line_count (Grob *me) +{ + Grob *st = get_staff_symbol (me); + return st ? Staff_symbol::line_count (st) : 0; +} -Staff_symbol_referencer::Staff_symbol_referencer () +bool +Staff_symbol_referencer::on_line (Grob *me, int pos) { - staff_sym_l_ =0; + Grob *st = get_staff_symbol (me); + return st ? Staff_symbol::on_line (st, pos) : false; } -void -Staff_symbol_referencer::do_substitute_element_pointer (Score_element *o, Score_element*n) +bool +Staff_symbol_referencer::on_staff_line (Grob *me, int pos) +{ + Grob *st = get_staff_symbol (me); + return st ? Staff_symbol::on_line (st, pos, false) : false; +} + +Grob * +Staff_symbol_referencer::get_staff_symbol (Grob *me) +{ + if (has_interface (me)) + return me; + + SCM st = me->get_object ("staff-symbol"); + return unsmob (st); +} + +Real +Staff_symbol_referencer::staff_space (Grob *me) +{ + Grob *st = get_staff_symbol (me); + if (st) + 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->layout ()->get_dimension (ly_symbol2scm ("line-thickness")); +} + +Real +Staff_symbol_referencer::get_position (Grob *me) +{ + return internal_get_position (me, false); +} + +Real +Staff_symbol_referencer::pure_get_position (Grob *me) +{ + return internal_get_position (me, true); +} + +Real +Staff_symbol_referencer::internal_get_position (Grob *me, bool pure) +{ + 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 = (pure + ? me->pure_relative_y_coordinate (c, 0, INT_MAX) + : me->relative_coordinate (c, Y_AXIS)) + - st->relative_coordinate (c, Y_AXIS); + Real space = Staff_symbol::staff_space (st); + p = (space == 0) ? 0 : 2.0 * y / space; + 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) { - if (staff_sym_l_ == o) + Grob *st = get_staff_symbol (me); + Grob *c = st ? me->common_refpoint (st, Y_AXIS) : 0; + + Interval retval; + if (st && c) { - staff_sym_l_ = dynamic_cast (n); + 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))); } int -Staff_symbol_referencer::lines_i () const +Staff_symbol_referencer::pure_get_rounded_position (Grob *me) { - return (staff_sym_l_) ? staff_sym_l_->no_lines_i_ : 5; + return int (rint (pure_get_position (me))); } +MAKE_SCHEME_CALLBACK (Staff_symbol_referencer, callback, 1); +SCM +Staff_symbol_referencer::callback (SCM smob) +{ + Grob *me = unsmob (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_staff_symbol (Staff_symbol*s) +Staff_symbol_referencer::set_position (Grob *me, Real p) { - staff_sym_l_ =s; - add_dependency (s); + internal_set_position (me, p, false); } -Staff_symbol* -Staff_symbol_referencer::staff_symbol_l () const +void +Staff_symbol_referencer::pure_set_position (Grob *me, Real p) { - return staff_sym_l_; + internal_set_position (me, p, true); } -Real -Staff_symbol_referencer::staff_line_leading_f () const +void +Staff_symbol_referencer::internal_set_position (Grob *me, Real p, bool pure) +{ + Grob *st = get_staff_symbol (me); + Real oldpos = 0.0; + if (st && me->common_refpoint (st, Y_AXIS)) + { + oldpos = pure ? pure_get_position (me) : get_position (me); + } + + Real ss = Staff_symbol_referencer::staff_space (me); + me->translate_axis ((p - oldpos) * ss * 0.5, Y_AXIS); +} + +Interval +Staff_symbol_referencer::staff_span (Grob *me) { - return (staff_sym_l_) ? staff_sym_l_->staff_line_leading_f_ : paper_l ()->get_realvar (interline_scm_sym); + Interval result; + if (me) + if (Grob *symb = get_staff_symbol (me)) + result = Staff_symbol::line_span (symb); + return result; } +Real +Staff_symbol_referencer::staff_radius (Grob *me) +{ + /* + line_span is measured in pitch steps, not in staff spaces + */ + return staff_span (me).length () / 4.0; +} int -Staff_symbol_referencer::position_i () const +compare_position (Grob *const &a, Grob *const &b) { - if (!staff_sym_l_ ) - return 0; + return sign (Staff_symbol_referencer::get_position ((Grob *)a) + - Staff_symbol_referencer::get_position ((Grob *) b)); +} - Graphical_element * c = common_refpoint (staff_sym_l_, Y_AXIS); - Real y = relative_coordinate (c, Y_AXIS) - staff_sym_l_->relative_coordinate (c, Y_AXIS); +bool +position_less (Grob *const &a, Grob *const &b) +{ + return Staff_symbol_referencer::get_position (a) + < Staff_symbol_referencer::get_position (b); +} - return int (2.0 * y / staff_line_leading_f ()); +bool +pure_position_less (Grob *const &a, Grob *const &b) +{ + return Staff_symbol_referencer::pure_get_position (a) + < Staff_symbol_referencer::pure_get_position (b); } + +ADD_INTERFACE (Staff_symbol_referencer, + "An object whose Y@tie{}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 " + );