X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstem.cc;h=6c111feee18050b85a78676aee9ad67fdacc05cf;hb=b0064942493df77833e6e41e05d362850f4874b0;hp=d0f9f8105c72cd8a949f74406b105273cbdfb28f;hpb=6a62932652940f4ac2931f75d48796887fbc5fdc;p=lilypond.git diff --git a/lily/stem.cc b/lily/stem.cc index d0f9f8105c..6c111feee1 100644 --- a/lily/stem.cc +++ b/lily/stem.cc @@ -3,290 +3,634 @@ source file of the GNU LilyPond music typesetter - (c) 1996,1997 Han-Wen Nienhuys + (c) 1996--2000 Han-Wen Nienhuys + Jan Nieuwenhuizen + + TODO: This is way too hairy */ +#include // m_pi +#include "directional-element-interface.hh" +#include "dimension-cache.hh" #include "stem.hh" -#include "dimen.hh" #include "debug.hh" #include "paper-def.hh" #include "note-head.hh" #include "lookup.hh" #include "molecule.hh" -#include "p-col.hh" +#include "paper-column.hh" #include "misc.hh" +#include "beam.hh" +#include "rest.hh" +#include "group-interface.hh" +#include "cross-staff.hh" +#include "staff-symbol-referencer.hh" -const int STEMLEN=7; -int -Stem::min_head_i()const + +void +Stem::set_beaming (int i, Direction d ) { - int m = 1000; - for (int i =0; i < head_l_arr_.size(); i++) - m = m position_i_; - return m; + SCM pair = get_elt_property ("beaming"); + + if (!gh_pair_p (pair)) + { + pair = gh_cons (gh_int2scm (0),gh_int2scm (0)); + set_elt_property ("beaming", pair); + } + index_set_cell (pair, d, gh_int2scm (i)); } int -Stem::max_head_i() const +Stem::beam_count (Direction d) const { - int m = -1000; - for (int i =0; i < head_l_arr_.size(); i++) - m = m >? head_l_arr_[i]->position_i_; - return m; - + SCM p=get_elt_property ("beaming"); + if (gh_pair_p (p)) + return gh_scm2int (index_cell (p,d)); + else + return 0; } -Stem::Stem(int c) +Interval +Stem::head_positions () const { - beams_left_i_ = 0; - beams_right_i_ = 0; + if (!heads_i ()) + { + Interval iv; + return iv; + } - stem_bottom_f_ = stem_top_f_ = 0; - flag_i_ = 4; - dir_i_ =0; - staff_size_i_ = c; + + Drul_array e (extremal_heads ()); - print_flag_b_=true; - stem_xoffset_f_ =0; + return Interval (staff_symbol_referencer (e[DOWN]).position_f (), + staff_symbol_referencer( e[UP]).position_f ()); } -IMPLEMENT_IS_TYPE_B1(Stem,Item); - -void -Stem::do_print() const -{ -#ifndef NPRINT - mtor << "flag "<< flag_i_ << " print_flag_b_ " << print_flag_b_; -#endif -} - -Real -Stem::stem_length_f()const +Real +Stem::chord_start_f () const { - return stem_top_f_-stem_bottom_f_ ; + return head_positions()[get_direction ()] + * Staff_symbol_referencer_interface (this).staff_space ()/2.0; } Real -Stem::stem_start_f()const +Stem::stem_end_position () const { - return (dir_i_ < 0)? stem_top_f_ : stem_bottom_f_; + SCM p =get_elt_property ("stem-end-position"); + Real pos; + if (!gh_number_p (p)) + { + Stem * me = (Stem*) this; + pos = get_default_stem_end_position (); + me->set_elt_property ("stem-end-position", gh_double2scm (pos)); + } + else + pos = gh_scm2double (p); + + return pos; } -Real -Stem::stem_end_f() const +Direction +Stem::get_direction () const { - return (dir_i_ < 0)? stem_bottom_f_ : stem_top_f_; + Direction d = directional_element (this).get (); + + if (!d) + { + Stem * me = (Stem*) this; + d = get_default_dir (); + // urg, AAARGH! + directional_element (me).set (d); + } + return d ; } void -Stem::set_stemend(Real se) +Stem::set_stemend (Real se) { - // todo: margins - if (! ((dir_i_ > 0 && se >= max_head_i()) || - (se <= min_head_i() && dir_i_ <0)) ) - warning("Weird stem size; check for narrow beams"); + // todo: margins + Direction d= get_direction (); + + if (d && d * head_positions()[get_direction ()] >= se*d) + warning (_ ("Weird stem size; check for narrow beams")); - stem_top_f_ = (dir_i_ < 0) ? max_head_i() : se; - stem_bottom_f_ = (dir_i_ < 0) ? se : min_head_i(); + set_elt_property ("stem-end-position", gh_double2scm (se)); } -void -Stem::add(Note_head *n) +int +Stem::type_i () const { - n->add_dependency(this); - if (n->rest_b_) { - rest_l_arr_.push(n); - } else if (n->balltype_i_ == 1) { - whole_l_arr_.push(n); - return; - } else{ - head_l_arr_.push(n); - } + return first_head () ? first_head ()->balltype_i () : 2; } -bool -Stem::invisible_b()const +/* + Note head that determines hshift for upstems + */ +Score_element* +Stem::support_head ()const { - return !head_l_arr_.size(); + SCM h = get_elt_pointer ("support-head"); + Score_element * nh = unsmob_element (h); + if (nh) + return nh; + else if (heads_i () == 1) + { + /* + UGH. + */ + + return unsmob_element (gh_car (get_elt_pointer ("heads"))); + } + else + return first_head (); } -// if dir_i_ is set we return fake values. int -Stem::get_center_distance_from_top() +Stem::heads_i ()const { - if (dir_i_) - return (dir_i_ > 0) ? 0 : 1; + Pointer_group_interface gi (this, "heads"); + return gi.count (); +} - int staff_center = staff_size_i_ / 2; - int max = max_head_i() - staff_center; - return max >? 0; +/* + The note head which forms one end of the stem. + */ +Note_head* +Stem::first_head () const +{ + return extremal_heads ()[-get_direction ()]; } -// if dir_i_ is set we return fake values. -int -Stem::get_center_distance_from_bottom() +/* + START is part where stem reaches `last' head. + */ +Drul_array +Stem::extremal_heads () const { - if (dir_i_) - return (dir_i_ > 0) ? 1 : 0; + const int inf = 1000000; + Drul_array extpos; + extpos[DOWN] = inf; + extpos[UP] = -inf; + + Drul_array exthead; + exthead[LEFT] = exthead[RIGHT] =0; + + for (SCM s = get_elt_pointer ("heads"); gh_pair_p (s); s = gh_cdr (s)) + { + Note_head * n = dynamic_cast (unsmob_element (gh_car (s))); + Staff_symbol_referencer_interface si (n); + + int p = int(si.position_f ()); + + Direction d = LEFT; + do { + if (d* p > d* extpos[d]) + { + exthead[d] = n; + extpos[d] = p; + } + } while (flip (&d) != DOWN); + } - int staff_center = staff_size_i_ / 2; - int min = staff_center - min_head_i(); - return min >? 0; + return exthead; } -int -Stem::get_default_dir() +void +Stem::add_head (Rhythmic_head *n) { - if (dir_i_) - return dir_i_; - return (get_center_distance_from_top() >= - get_center_distance_from_bottom()) ? -1 : 1; + n->set_elt_pointer ("stem", this->self_scm_); + n->add_dependency (this); + + Pointer_group_interface gi (this); + if (Note_head *nh = dynamic_cast (n)) + gi.name_ = "heads"; + else + gi.name_ = "rests"; + + gi.add_element (n); } +Stem::Stem (SCM s) + : Item (s) +{ + set_elt_pointer ("heads", SCM_EOL); + set_elt_pointer ("rests", SCM_EOL); -void -Stem::set_default_dir() + add_offset_callback ( &Stem::off_callback, X_AXIS); +} + +bool +Stem::invisible_b () const { - dir_i_ = get_default_dir(); + /* + UGH. Who determines balltype for stem? + */ + Note_head * nh = dynamic_cast (support_head ()); + return !(heads_i () && nh->balltype_i () >= 1); } -void -Stem::set_default_stemlen() +int +Stem::get_center_distance (Direction d) const { - if (!dir_i_) - set_default_dir(); + int staff_center = 0; + int distance = (int) (d*(head_positions()[d] - staff_center)); + return distance >? 0; +} - - // ugh... how about non 5-line staffs? - if ((max_head_i() < -2 && dir_i_ == 1 ) - ||(min_head_i() > staff_size_i_ && dir_i_ == -1) ){ - set_stemend( staff_size_i_ /2 -1 ); - } else { - set_stemend( (dir_i_ > 0) ? max_head_i() + STEMLEN : - min_head_i() - STEMLEN); +Direction +Stem::get_default_dir () const +{ + int du = get_center_distance (UP); + int dd = get_center_distance (DOWN); + + if (sign (dd - du)) + return Direction (sign (dd -du)); + + return Direction (int(paper_l ()->get_var ("stem_default_neutral_direction"))); +} +/* + ugh. A is used for different purposes. This functionality should be + moved into scheme at some point to get rid of the silly + conversions. (but lets wait till we have namespaces in SCM) + */ +Real +Stem::get_default_stem_end_position () const +{ + bool grace_b = to_boolean (get_elt_property ("grace")); + String type_str = grace_b ? "grace-" : ""; + SCM s; + Array a; + + Real length_f = 0.; + SCM scm_len = get_elt_property("length"); + if (gh_number_p (scm_len)) + { + length_f = gh_scm2double (scm_len); } + else + { + s = scm_eval (ly_symbol2scm ((type_str + "stem-length").ch_C())); + for (SCM q = s; q != SCM_EOL; q = gh_cdr (q)) + a.push (gh_scm2double (gh_car (q))); + + // stem uses half-spaces + length_f = a[((flag_i () - 2) >? 0) ? 0) 0){ - stem_xoffset_f_ = paper()->note_width()-paper()->rule_thickness(); - } else - stem_xoffset_f_ = 0; -} + if (!heads_i ()) + return; + + Link_array heads = + Pointer_group_interface__extract_elements (this, (Score_element*)0, "heads"); -/* - TODO + heads.sort (compare_position); + Direction dir =get_direction (); + + if (dir < 0) + heads.reverse (); + + + Real w = support_head ()->extent (X_AXIS)[dir]; + for (int i=0; i < heads.size (); i++) + { + heads[i]->translate_axis (w - heads[i]->extent (X_AXIS)[dir], X_AXIS); + } - move into note_column.cc + bool parity= true; // todo: make this settable. + int lastpos = int (Staff_symbol_referencer_interface (heads[0]).position_f ()); + for (int i=1; i < heads.size (); i ++) + { + Real p = Staff_symbol_referencer_interface (heads[i]).position_f (); + int dy =abs (lastpos- (int)p); + + if (dy <= 1) + { + if (parity) + { + Real l = heads[i]->extent (X_AXIS).length (); + heads[i]->translate_axis (l * get_direction (), X_AXIS); + } + parity = !parity; + } + else + parity = true; + + lastpos = int (p); + } +} - */ void -Stem::set_noteheads() +Stem::before_line_breaking () { - if(!head_l_arr_.size()) - return; - head_l_arr_.sort(Note_head::compare); - if (dir_i_ < 0) - head_l_arr_.reverse(); - - head_l_arr_[0]->extremal_i_ = -1; - head_l_arr_.top()->extremal_i_ = 1; - int parity=1; - int lastpos = head_l_arr_[0]->position_i_; - for (int i=1; i < head_l_arr_.size(); i ++) { - int dy =abs(lastpos- head_l_arr_[i]->position_i_); - - if (dy <= 1) { - if (parity) - head_l_arr_[i]->x_dir_i_ = (stem_xoffset_f_>0) ? 1:-1; - parity = !parity; - } else - parity = 0; - lastpos = head_l_arr_[i]->position_i_; + stem_end_position (); // ugh. Trigger direction calc. + position_noteheads (); + + if (invisible_b ()) + { + remove_elt_property ("molecule-callback"); + // suicide(); } + + set_spacing_hints (); } + + +/** + set stem directions for hinting the optical spacing correction. + + Modifies DIR_LIST property of the Stem's Paper_column + + TODO: more advanced: supply height of noteheads as well, for more advanced spacing possibilities + */ void -Stem::do_pre_processing() +Stem::set_spacing_hints () { - if (stem_bottom_f_== stem_top_f_) - set_default_extents(); - set_noteheads(); - flag_i_ = dir_i_*abs(flag_i_); - transparent_b_ = invisible_b(); - empty_b_ = invisible_b(); + if (!invisible_b ()) + { + SCM scmdir = gh_int2scm (get_direction ()); + SCM dirlist = column_l ()->get_elt_property ("dir-list"); + if (dirlist == SCM_UNDEFINED) + dirlist = SCM_EOL; + + if (scm_sloppy_memq (scmdir, dirlist) == SCM_EOL) + { + dirlist = gh_cons (scmdir, dirlist); + column_l ()->set_elt_property ("dir-list", dirlist); + } + } } +Molecule +Stem::flag () const +{ + String style; + SCM st = get_elt_property ("flag-style"); + if ( gh_string_p (st)) + { + style = ly_scm2string (st); + } + + char c = (get_direction () == UP) ? 'u' : 'd'; + Molecule m = lookup_l ()->afm_find (String ("flags-") + to_str (c) + + to_str (flag_i ())); + if (!style.empty_b ()) + m.add_molecule(lookup_l ()->afm_find (String ("flags-") + to_str (c) + style)); + return m; +} Interval -Stem::do_width()const +Stem::dim_callback (Score_element const *se, Axis ) { - if (!print_flag_b_ || abs(flag_i_) <= 4) - return Interval(0,0); // TODO! - Paper_def*p= paper(); - Interval r(p->lookup_l()->flag(flag_i_).dim.x()); - r+= stem_xoffset_f_; - return r; + Stem * s = dynamic_cast ((Score_element*)se); + + Interval r (0, 0); + if (unsmob_element (s->get_elt_pointer ("beam")) || abs (s->flag_i ()) <= 2) + ; // TODO! + else + { + r = s->flag ().extent (X_AXIS); + } + return r; } -Molecule* -Stem::brew_molecule_p()const + +const Real ANGLE = 20* (2.0*M_PI/360.0); // ugh! Should be settable. + +MAKE_SCHEME_SCORE_ELEMENT_CALLBACKS(Stem) +Molecule +Stem::do_brew_molecule () const { - Molecule *out =0; - - Real bot = stem_bottom_f_; - Real top = stem_top_f_; - - assert(bot!=top); - - Paper_def *p =paper(); - - Real dy = p->internote_f(); - Symbol ss =p->lookup_l()->stem(bot*dy,top*dy); - - out = new Molecule(Atom(ss)); - - if (print_flag_b_&&abs(flag_i_) > 4){ - Symbol fl = p->lookup_l()->flag(flag_i_); - Molecule m(fl); - if (flag_i_ < -4){ - out->add_bottom(m); - } else if (flag_i_ > 4) { - out->add_top(m); - } else - assert(false); + Molecule mol; + + Staff_symbol_referencer_interface si (first_head ()); + + Real y1 = si.position_f(); + Real y2 = stem_end_position (); + + Interval stem_y(y1,y2); + stem_y.unite (Interval (y2,y1)); + + Real dy = staff_symbol_referencer (this).staff_space ()/2.0; + Real head_wid = 0; + if (support_head ()) + head_wid = support_head ()->extent (X_AXIS).length (); + stem_y[Direction(-get_direction ())] += get_direction () * head_wid * tan(ANGLE)/(2*dy); + + if (!invisible_b ()) + { + Real stem_width = paper_l ()->get_var ("stemthickness"); + Molecule ss =lookup_l ()->filledbox (Box (Interval (-stem_width/2, stem_width/2), + Interval (stem_y[DOWN]*dy, stem_y[UP]*dy))); + mol.add_molecule (ss); } - out->translate(stem_xoffset_f_, X_AXIS); - return out; + if (!beam_l () && abs (flag_i ()) > 2) + { + Molecule fl = flag (); + fl.translate_axis(stem_y[get_direction ()]*dy, Y_AXIS); + mol.add_molecule (fl); + } + + return mol; } Real -Stem::hpos_f()const +Stem::off_callback (Score_element const* se, Axis) { - return Item::hpos_f() + stem_xoffset_f_; + Stem *st = dynamic_cast ((Score_element*)se); + + Real r=0; + if (Note_head * f = st->first_head ()) + { + Interval head_wid(0, f->extent (X_AXIS).length ()); + + if (to_boolean (st->get_elt_property ("stem-centered"))) + return head_wid.center (); + + Real rule_thick = st->paper_l ()->get_var ("stemthickness"); + Direction d = st->get_direction (); + r = head_wid[d] - d * rule_thick ; + } + return r; } -void -Stem::do_substitute_dependency(Score_elem*o,Score_elem*n) + +Beam* +Stem::beam_l ()const { - Item * o_l = o->item(); - Item * n_l = n? n->item():0; - whole_l_arr_.substitute((Note_head*)o_l, (Note_head*)n_l); - head_l_arr_.substitute((Note_head*)o_l, (Note_head*)n_l); - rest_l_arr_.substitute((Note_head*)o_l, (Note_head*)n_l); + SCM b= get_elt_pointer ("beam"); + return dynamic_cast (unsmob_element (b)); +} + + +// ugh still very long. +Stem_info +Stem::calc_stem_info () const +{ + assert (beam_l ()); + + Direction beam_dir = directional_element (beam_l ()).get (); + if (!beam_dir) + { + programming_error ("Beam dir not set."); + beam_dir = UP; + } + + Staff_symbol_referencer_interface st (this); + Real staff_space = st.staff_space (); + Real half_space = staff_space / 2; + Real interbeam_f = paper_l ()->interbeam_f (beam_l ()->get_multiplicity ()); + Real thick = gh_scm2double (beam_l ()->get_elt_property ("beam-thickness")); + int multiplicity = beam_l ()->get_multiplicity (); + + Stem_info info; + info.idealy_f_ = chord_start_f (); + + // for simplicity, we calculate as if dir == UP + info.idealy_f_ *= beam_dir; + SCM grace_prop = get_elt_property ("grace"); + + bool grace_b = to_boolean (grace_prop); + + Array a; + SCM s; + String type_str = grace_b ? "grace-" : ""; + + s = scm_eval (ly_symbol2scm ((type_str + "beamed-stem-minimum-length").ch_C())); + a.clear (); + for (SCM q = s; q != SCM_EOL; q = gh_cdr (q)) + a.push (gh_scm2double (gh_car (q))); + + + Real minimum_length = a[multiplicity ? 0 + >? (- 2 * half_space - thick + + (multiplicity > 0) * thick + + interbeam_f * (multiplicity - 1)); + } + } + else + /* knee */ + { + info.idealy_f_ -= thick; + info.maxy_f_ = info.idealy_f_; + info.miny_f_ = -INT_MAX; + + info.idealy_f_ -= stem_length; + info.maxy_f_ -= minimum_length; + } + + info.idealy_f_ = (info.maxy_f_ ? info.miny_f_; + + s = beam_l ()->get_elt_property ("shorten"); + if (gh_number_p (s)) + info.idealy_f_ -= gh_double2scm (s); + + Real interstaff_f = -beam_dir* calc_interstaff_dist (this, beam_l ()); + + info.idealy_f_ += interstaff_f; + info.miny_f_ += interstaff_f; + info.maxy_f_ += interstaff_f ; + + return info; } +