X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstem.cc;h=ceefac9709c6f2978ede0cdbce8212834efe914e;hb=38269bfebef7893a1bd82fd2182155f77a59e5a7;hp=94ddf6ca933bb6579353d0cb467a08648fe70364;hpb=c802622f935af83bb791ded58056428d6be31d0a;p=lilypond.git diff --git a/lily/stem.cc b/lily/stem.cc index 94ddf6ca93..ceefac9709 100644 --- a/lily/stem.cc +++ b/lily/stem.cc @@ -3,18 +3,23 @@ source file of the GNU LilyPond music typesetter - (c) 1996--2000 Han-Wen Nienhuys + (c) 1996--2002 Han-Wen Nienhuys Jan Nieuwenhuizen TODO: This is way too hairy + + TODO: fix naming. + + Stem-end, chord-start, etc. is all confusing naming. */ -#include // m_pi + +#include // rint #include "lookup.hh" #include "directional-element-interface.hh" #include "note-head.hh" #include "stem.hh" -#include "debug.hh" +#include "warn.hh" #include "paper-def.hh" #include "rhythmic-head.hh" #include "font-interface.hh" @@ -24,67 +29,63 @@ #include "beam.hh" #include "rest.hh" #include "group-interface.hh" -#include "cross-staff.hh" #include "staff-symbol-referencer.hh" #include "spanner.hh" - +#include "side-position-interface.hh" +#include "dot-column.hh" void -Stem::set_beaming (Score_element*me ,int i, Direction d ) +Stem::set_beaming (Grob*me, int beam_count, Direction d) { - SCM pair = me->get_elt_property ("beaming"); + SCM pair = me->get_grob_property ("beaming"); if (!gh_pair_p (pair)) { - pair = gh_cons (gh_int2scm (0),gh_int2scm (0)); - me-> set_elt_property ("beaming", pair); + pair = gh_cons (SCM_EOL, SCM_EOL); + me->set_grob_property ("beaming", pair); } - index_set_cell (pair, d, gh_int2scm (i)); -} -int -Stem::beam_count (Score_element*me,Direction d) -{ - SCM p=me->get_elt_property ("beaming"); - if (gh_pair_p (p)) - return gh_scm2int (index_cell (p,d)); - else - return 0; + SCM l = index_get_cell (pair, d); + for( int i = 0; i< beam_count; i++) + { + l = gh_cons (gh_int2scm (i), l); + } + index_set_cell (pair, d, l); } + Interval -Stem::head_positions (Score_element*me) +Stem::head_positions (Grob*me) { - if (!heads_i (me)) + if (!head_count (me)) { Interval iv; return iv; } - Drul_array e (extremal_heads (me)); + Drul_array e (extremal_heads (me)); - return Interval (Staff_symbol_referencer::position_f (e[DOWN]), - Staff_symbol_referencer::position_f ( e[UP])); + return Interval (Staff_symbol_referencer::get_position (e[DOWN]), + Staff_symbol_referencer::get_position (e[UP])); } Real -Stem::chord_start_f (Score_element*me) +Stem::chord_start_y (Grob*me) { - return head_positions(me)[get_direction (me)] + return head_positions (me)[get_direction (me)] * Staff_symbol_referencer::staff_space (me)/2.0; } Real -Stem::stem_end_position (Score_element*me) +Stem::stem_end_position (Grob*me) { - SCM p =me->get_elt_property ("stem-end-position"); + SCM p =me->get_grob_property ("stem-end-position"); Real pos; if (!gh_number_p (p)) { - pos = get_default_stem_end_position (me); - me->set_elt_property ("stem-end-position", gh_double2scm (pos)); + me->set_grob_property ("stem-end-position", gh_double2scm (pos)); } else pos = gh_scm2double (p); @@ -93,7 +94,7 @@ Stem::stem_end_position (Score_element*me) } Direction -Stem::get_direction (Score_element*me) +Stem::get_direction (Grob*me) { Direction d = Directional_element_interface::get (me); @@ -108,40 +109,35 @@ Stem::get_direction (Score_element*me) void -Stem::set_stemend (Score_element*me, Real se) +Stem::set_stemend (Grob*me, Real se) { // todo: margins Direction d= get_direction (me); - if (d && d * head_positions(me)[get_direction (me)] >= se*d) - warning (_ ("Weird stem size; check for narrow beams")); + if (d && d * head_positions (me)[get_direction (me)] >= se*d) + me->warning (_ ("Weird stem size; check for narrow beams")); - me->set_elt_property ("stem-end-position", gh_double2scm (se)); + me->set_grob_property ("stem-end-position", gh_double2scm (se)); } -int -Stem::type_i (Score_element*me) -{ - return first_head (me) ? Rhythmic_head::balltype_i (first_head (me)) : 2; -} /* Note head that determines hshift for upstems */ -Score_element* -Stem::support_head (Score_element*me) +Grob* +Stem::support_head (Grob*me) { - SCM h = me->get_elt_property ("support-head"); - Score_element * nh = unsmob_element (h); + SCM h = me->get_grob_property ("support-head"); + Grob * nh = unsmob_grob (h); if (nh) return nh; - else if (heads_i (me) == 1) + else if (head_count (me) == 1) { /* UGH. */ - return unsmob_element (gh_car (me->get_elt_property ("heads"))); + return unsmob_grob (ly_car (me->get_grob_property ("note-heads"))); } else return first_head (me); @@ -149,40 +145,55 @@ Stem::support_head (Score_element*me) int -Stem::heads_i (Score_element*me) +Stem::head_count (Grob*me) { - return Pointer_group_interface::count (me, "heads"); + return Pointer_group_interface::count (me, "note-heads"); } /* The note head which forms one end of the stem. */ -Score_element* -Stem::first_head (Score_element*me) +Grob* +Stem::first_head (Grob*me) { - return extremal_heads (me)[-get_direction (me)]; + Direction d = get_direction (me); + if (!d) + return 0; + return extremal_heads (me)[-d]; +} + +/* + The note head opposite to the first head. + */ +Grob* +Stem::last_head (Grob*me) +{ + Direction d = get_direction (me); + if (!d) + return 0; + return extremal_heads (me)[d]; } /* START is part where stem reaches `last' head. */ -Drul_array -Stem::extremal_heads (Score_element*me) +Drul_array +Stem::extremal_heads (Grob*me) { const int inf = 1000000; Drul_array extpos; extpos[DOWN] = inf; extpos[UP] = -inf; - Drul_array exthead; + Drul_array exthead; exthead[LEFT] = exthead[RIGHT] =0; - for (SCM s = me->get_elt_property ("heads"); gh_pair_p (s); s = gh_cdr (s)) + for (SCM s = me->get_grob_property ("note-heads"); gh_pair_p (s); s = ly_cdr (s)) { - Score_element * n = unsmob_element (gh_car (s)); + Grob * n = unsmob_grob (ly_car (s)); - int p = int(Staff_symbol_referencer::position_f (n)); + int p = int (Staff_symbol_referencer::get_position (n)); Direction d = LEFT; do { @@ -197,82 +208,110 @@ Stem::extremal_heads (Score_element*me) return exthead; } +static int +icmp (int const &a, int const &b) +{ + return a-b; +} + +Array +Stem::note_head_positions (Grob *me) +{ + Array ps ; + for (SCM s = me->get_grob_property ("note-heads"); gh_pair_p (s); s = ly_cdr (s)) + { + Grob * n = unsmob_grob (ly_car (s)); + int p = int (Staff_symbol_referencer::get_position (n)); + + ps.push (p); + } + + ps.sort (icmp); + return ps; +} + + void -Stem::add_head (Score_element*me, Score_element *n) +Stem::add_head (Grob*me, Grob *n) { - n->set_elt_property ("stem", me->self_scm ()); + n->set_grob_property ("stem", me->self_scm ()); n->add_dependency (me); if (Note_head::has_interface (n)) { - Pointer_group_interface::add_element (me, "heads",n); - } - else - { - n->set_elt_property ("rest", n->self_scm ()); + Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-heads"), n); } } bool -Stem::invisible_b (Score_element*me) +Stem::invisible_b (Grob*me) { - return !(heads_i (me) && Rhythmic_head::balltype_i (support_head (me)) >= 1); -} - -int -Stem::get_center_distance (Score_element*me, Direction d) -{ - int staff_center = 0; - int distance = (int) (d*(head_positions(me)[d] - staff_center)); - return distance >? 0; + return ! (head_count (me) && Note_head::get_balltype (support_head (me)) >= 1); } Direction -Stem::get_default_dir (Score_element*me) +Stem::get_default_dir (Grob*me) { - int du = get_center_distance (me,UP); - int dd = get_center_distance (me,DOWN); - - if (sign (dd - du)) - return Direction (sign (dd -du)); + int staff_center = 0; + Interval hp = head_positions (me); + if (hp.empty_b()) + { + return CENTER; + } + + int udistance = (int) (UP * hp[UP] - staff_center); + int ddistance = (int) (DOWN* hp[DOWN] - staff_center); + + if (sign (ddistance - udistance)) + return Direction (sign (ddistance -udistance)); - return to_dir (me->get_elt_property ("default-neutral-direction")); + return to_dir (me->get_grob_property ("neutral-direction")); } Real -Stem::get_default_stem_end_position (Score_element*me) +Stem::get_default_stem_end_position (Grob*me) { - bool grace_b = to_boolean (me->get_elt_property ("grace")); + SCM up_to_staff = me->get_grob_property ("up-to-staff"); + if (to_boolean(up_to_staff)) + { + int line_count = Staff_symbol_referencer::line_count (me); + + Direction dir = get_direction (me); + + return dir* (line_count + 3.5); + } + + bool grace_b = to_boolean (me->get_grob_property ("grace")); SCM s; Array a; - Real length_f = 0.; - SCM scm_len = me->get_elt_property("length"); + Real length_f = 3.5; + SCM scm_len = me->get_grob_property ("length"); if (gh_number_p (scm_len)) { length_f = gh_scm2double (scm_len); } else { - s = me->get_elt_property("lengths"); - 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 (me) - 2) >? 0) get_grob_property ("lengths"); + if (gh_pair_p (s)) + { + length_f = 2* gh_scm2double (robust_list_ref (duration_log(me) -2, s)); + } } - a.clear (); - s = me->get_elt_property ("stem-shorten"); - for (SCM q = s; gh_pair_p (q); q = gh_cdr (q)) - a.push (gh_scm2double (gh_car (q))); - - - // stem uses half-spaces + Real shorten_f = 0.0; + + SCM sshorten = me->get_grob_property ("stem-shorten"); + if (gh_pair_p (sshorten)) + { + shorten_f = 2* gh_scm2double (robust_list_ref ((duration_log (me) - 2) >? 0, sshorten)); + } - // fixme: use gh_list_ref () iso. array[] - Real shorten_f = a[((flag_i (me) - 2) >? 0) get_grob_property ("no-stem-extend")); + if (!grace_b && !no_extend_b && dir * st < 0) // junkme? + st = 0.0; + + /* + Make a little room if we have a upflag and there is a dot. + previous approach was to lengthen the stem. This is not + good typesetting practice. + + */ + if (!get_beam (me) && dir == UP + && duration_log (me) > 2) + { + Grob * closest_to_flag = extremal_heads (me)[dir]; + Grob * dots = closest_to_flag + ? Rhythmic_head::get_dots (closest_to_flag ) : 0; + + if (dots) + { + Real dp = Staff_symbol_referencer::get_position (dots); + Real flagy = flag (me).extent (Y_AXIS)[-dir] * 2 + / Staff_symbol_referencer::staff_space (me); + + /* + Very gory: add myself to the X-support of the parent, + which should be a dot-column. + */ + if (dir * (st + flagy - dp) < 0.5) + { + Grob *par = dots->get_parent (X_AXIS); + + if (Dot_column::has_interface (par)) + { + Side_position_interface::add_support (par, me); + + /* + TODO: apply some better logic here. The flag is + curved inwards, so this will typically be too + much. + */ + } + } + } + } - Real st = head_positions(me)[dir] + dir * length_f; - - bool no_extend_b = to_boolean (me->get_elt_property ("no-stem-extend")); - if (!grace_b && !no_extend_b && dir * st < 0) // junkme? - st = 0.0; return st; } + + /* - Number of hooks on the flag, ie. the log of the duration. + + the log of the duration (Number of hooks on the flag minus two) */ int -Stem::flag_i (Score_element*me) +Stem::duration_log (Grob*me) { - SCM s = me->get_elt_property ("duration-log"); - return (gh_number_p (s)) ? gh_scm2int (s) : 2; + SCM s = me->get_grob_property ("duration-log"); + return (gh_number_p (s)) ? gh_scm2int (s) : 2; } void -Stem::position_noteheads (Score_element*me) +Stem::position_noteheads (Grob*me) { - if (!heads_i (me)) + if (!head_count (me)) return; - Link_array heads = - Pointer_group_interface__extract_elements (me, (Score_element*)0, "heads"); + Link_array heads = + Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-heads"); heads.sort (compare_position); Direction dir =get_direction (me); @@ -328,26 +410,54 @@ Stem::position_noteheads (Score_element*me) heads.reverse (); - Score_element *hed = support_head (me); - Real w = hed->extent (hed, X_AXIS)[dir]; + bool invisible = invisible_b (me); + Real thick = 0.0; + if (invisible) + thick = gh_scm2double (me->get_grob_property ("thickness")) + * me->get_paper ()->get_var ("linethickness"); + + + Grob *hed = support_head (me); + Real w = Note_head::head_extent (hed,X_AXIS)[dir]; for (int i=0; i < heads.size (); i++) { - heads[i]->translate_axis (w - heads[i]->extent (heads[i], X_AXIS)[dir], X_AXIS); + heads[i]->translate_axis (w - Note_head::head_extent (heads[i],X_AXIS)[dir], + X_AXIS); } bool parity= true; // todo: make me settable. - int lastpos = int (Staff_symbol_referencer::position_f (heads[0])); + int lastpos = int (Staff_symbol_referencer::get_position (heads[0])); for (int i=1; i < heads.size (); i ++) { - Real p = Staff_symbol_referencer::position_f (heads[i]); + Real p = Staff_symbol_referencer::get_position (heads[i]); int dy =abs (lastpos- (int)p); if (dy <= 1) { if (parity) { - Real l = heads[i]->extent (heads[i], X_AXIS).length (); - heads[i]->translate_axis (l * get_direction (me), X_AXIS); + Real l = Note_head::head_extent (heads[i], X_AXIS).length (); + + Direction d = get_direction (me); + heads[i]->translate_axis (l * d, X_AXIS); + + if (invisible_b(me)) + heads[i]->translate_axis (-thick *2* d , X_AXIS); + + + /* TODO: + + For some cases we should kern some more: when the + distance between the next or prev note is too large, we'd + get large white gaps, eg. + + | + X| + |X <- kern this. + | + X + + */ } parity = !parity; } @@ -358,282 +468,429 @@ Stem::position_noteheads (Score_element*me) } } -MAKE_SCHEME_CALLBACK(Stem,before_line_breaking,1); +MAKE_SCHEME_CALLBACK (Stem,before_line_breaking,1); SCM Stem::before_line_breaking (SCM smob) { - Score_element*me = unsmob_element (smob); - stem_end_position (me); // ugh. Trigger direction calc. - position_noteheads (me); + Grob*me = unsmob_grob (smob); + - if (invisible_b (me)) + /* + Do the calculations for visible stems, but also for invisible stems + with note heads (i.e. half notes.) + */ + if (head_count (me)) { - me->remove_elt_property ("molecule-callback"); - // suicide(); + stem_end_position (me); // ugh. Trigger direction calc. + position_noteheads (me); + } + else + { + me->remove_grob_property ("molecule-callback"); } - set_spacing_hints (me); return SCM_UNSPECIFIED; } - - -/** - 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 +/* + ugh. + When in a beam with tuplet brackets, brew_mol is called early, + caching a wrong value. */ -void -Stem::set_spacing_hints (Score_element*me) +MAKE_SCHEME_CALLBACK (Stem, height, 2); +SCM +Stem::height (SCM smob, SCM ax) { - if (!invisible_b (me)) - { - SCM scmdir = gh_int2scm (get_direction (me)); - - Item* item = dynamic_cast (me); - Item * col = item->column_l (); - SCM dirlist =col->get_elt_property ("dir-list"); - if (scm_sloppy_memq (scmdir, dirlist) == SCM_BOOL_F) - { - dirlist = gh_cons (scmdir, dirlist); - col->set_elt_property ("dir-list", dirlist); - } - } + Axis a = (Axis)gh_scm2int (ax); + Grob * me = unsmob_grob (smob); + assert (a == Y_AXIS); + + SCM mol = me->get_uncached_molecule (); + Interval iv; + if (mol != SCM_EOL) + iv = unsmob_molecule (mol)->extent (a); + return ly_interval2scm (iv); } + Molecule -Stem::flag (Score_element*me) +Stem::flag (Grob*me) { - String style; - SCM st = me->get_elt_property ("flag-style"); - if ( gh_string_p (st)) + /* TODO: rename flag-style into something more appropriate, + e.g. "stroke-style", maybe with values "" (i.e. no stroke), + "single" and "double". Needs more discussion. + */ + String style, fstyle, staffline_offs; + SCM fst = me->get_grob_property ("flag-style"); + if (gh_string_p (fst)) { - style = ly_scm2string (st); + fstyle = ly_scm2string (fst); } + SCM st = me->get_grob_property ("style"); + if (gh_symbol_p (st)) + { + style = (ly_scm2string (scm_symbol_to_string (st))); + } + else + { + style = ""; + } + bool adjust = to_boolean (me->get_grob_property ("adjust-if-on-staffline")); + + if (String::compare (style, "mensural") == 0) + /* Mensural notation: For notes on staff lines, use different + flags than for notes between staff lines. The idea is that + flags are always vertically aligned with the staff lines, + regardless if the note head is on a staff line or between two + staff lines. In other words, the inner end of a flag always + touches a staff line. + */ + { + if (adjust) + { + /* Urrgh! We have to detect wether this stem ends on a staff + line or between two staff lines. But we can not call + stem_end_position(me) or get_default_stem_end_position(me), + since this encounters the flag and hence results in an + infinite recursion. However, in pure mensural notation, + there are no multiple note heads attached to a single stem, + neither is there usually need for using the stem_shorten + property (except for 32th and 64th notes, but that is not a + problem since the stem length in this case is augmented by + an integral multiple of staff_space). Hence, it should be + sufficient to just take the first note head, assume it's + the only one, look if it's on a staff line, and select the + flag's shape accordingly. In the worst case, the shape + looks slightly misplaced, but that will usually be the + programmer's fault (e.g. when trying to attach multiple + note heads to a single stem in mensural notation). */ + + /* + perhaps the detection whether this correction is needed should + happen in a different place to avoid the recursion. + + --hwn. + */ + Grob *first = first_head(me); + int sz = Staff_symbol_referencer::line_count (me)-1; + int p = (int)rint (Staff_symbol_referencer::get_position (first)); + staffline_offs = (((p ^ sz) & 0x1) == 0) ? "1" : "0"; + } + else + { + staffline_offs = "2"; + } + } + else + { + staffline_offs = ""; + } char c = (get_direction (me) == UP) ? 'u' : 'd'; - Molecule m = Font_interface::get_default_font (me)->find_by_name (String ("flags-") + to_str (c) + - to_str (flag_i (me))); - if (!style.empty_b ()) - m.add_molecule(Font_interface::get_default_font (me)->find_by_name (String ("flags-") + to_str (c) + style)); + String index_string + = String ("flags-") + style + to_string (c) + staffline_offs + to_string (duration_log (me)); + Molecule m + = Font_interface::get_default_font (me)->find_by_name (index_string); + if (!fstyle.empty_b ()) + m.add_molecule (Font_interface::get_default_font (me)->find_by_name (String ("flags-") + to_string (c) + fstyle)); return m; } -MAKE_SCHEME_CALLBACK(Stem,dim_callback,2); +MAKE_SCHEME_CALLBACK (Stem,dim_callback,2); SCM -Stem::dim_callback (SCM e, SCM ) +Stem::dim_callback (SCM e, SCM ax) { - Score_element *se = unsmob_element (e); + Axis a = (Axis) gh_scm2int (ax); + assert (a == X_AXIS); + Grob *se = unsmob_grob (e); Interval r (0, 0); - if (unsmob_element (se->get_elt_property ("beam")) || abs (flag_i (se)) <= 2) + if (unsmob_grob (se->get_grob_property ("beam")) || abs (duration_log (se)) <= 2) ; // TODO! else { r = flag (se).extent (X_AXIS); } - return ly_interval2scm ( r); + return ly_interval2scm (r); } + -const Real ANGLE = 20* (2.0*M_PI/360.0); // ugh! Should be settable. - - -MAKE_SCHEME_CALLBACK(Stem,brew_molecule,1); +MAKE_SCHEME_CALLBACK (Stem,brew_molecule,1); SCM Stem::brew_molecule (SCM smob) { - Score_element*me = unsmob_element (smob); + Grob*me = unsmob_grob (smob); Molecule mol; Direction d = get_direction (me); - Real y1 = Staff_symbol_referencer::position_f (first_head (me)); - Real y2 = stem_end_position (me); + + Real y1; + + /* + This is required to avoid stems passing in tablature chords... + */ + + + /* + TODO: make the stem start a direction ? + */ - Interval stem_y(y1,y2); - stem_y.unite (Interval (y2,y1)); - Real dy = Staff_symbol_referencer::staff_space (me)/2.0; - Real head_wid = 0; - if (Score_element *hed = support_head (me)) - head_wid = hed->extent (hed,X_AXIS).length (); - stem_y[Direction(-d)] += d * head_wid * tan(ANGLE)/(2*dy); + if (to_boolean (me->get_grob_property ("avoid-note-head"))) + { + Grob * lh = last_head (me); + if (!lh) + return SCM_EOL; + y1 = Staff_symbol_referencer::get_position (lh); + } + else + { + Grob * lh = first_head (me); + if (!lh) + return SCM_EOL; + y1 = Staff_symbol_referencer::get_position (lh); + } + + Real y2 = stem_end_position (me); + + Interval stem_y (y1 ? y1); + + + // dy? + Real dy = Staff_symbol_referencer::staff_space (me) * 0.5; + + if (Grob *hed = support_head (me)) + { + /* + must not take ledgers into account. + */ + Interval head_height = Note_head::head_extent (hed,Y_AXIS); + Real y_attach = Note_head::stem_attachment_coordinate ( hed, Y_AXIS); + + y_attach = head_height.linear_combination (y_attach); + stem_y[Direction (-d)] += d * y_attach/dy; + } if (!invisible_b (me)) { - Real stem_width = gh_scm2double (me->get_elt_property ("thickness")) * me->paper_l ()->get_var ("stafflinethickness"); + Real stem_width = gh_scm2double (me->get_grob_property ("thickness")) + // URG + * me->get_paper ()->get_var ("linethickness"); + Molecule ss =Lookup::filledbox (Box (Interval (-stem_width/2, stem_width/2), Interval (stem_y[DOWN]*dy, stem_y[UP]*dy))); mol.add_molecule (ss); } - if (!beam_l (me) && abs (flag_i (me)) > 2) + if (!get_beam (me) && abs (duration_log (me)) > 2) { Molecule fl = flag (me); - fl.translate_axis(stem_y[d]*dy, Y_AXIS); + fl.translate_axis (stem_y[d]*dy, Y_AXIS); mol.add_molecule (fl); } return mol.smobbed_copy (); } -MAKE_SCHEME_CALLBACK(Stem,off_callback,2); +/* + move the stem to right of the notehead if it is up. + */ +MAKE_SCHEME_CALLBACK (Stem,off_callback,2); SCM -Stem::off_callback (SCM element_smob, SCM ) +Stem::off_callback (SCM element_smob, SCM) { - Score_element *me = unsmob_element (element_smob); + Grob *me = unsmob_grob (element_smob); Real r=0; - if (Score_element * f = first_head (me)) + + if (head_count (me) == 0) + { + return gh_double2scm (0.0); + } + + if (Grob * f = first_head (me)) { - Interval head_wid(0, f->extent (f,X_AXIS).length ()); + Interval head_wid = Note_head::head_extent(f, X_AXIS); - if (to_boolean (me->get_elt_property ("stem-centered"))) - return gh_double2scm ( head_wid.center ()); - Real rule_thick = gh_scm2double (me->get_elt_property ("thickness")) * me->paper_l ()->get_var ("stafflinethickness"); + Real attach =0.0; + + if (invisible_b (me)) + { + attach = 0.0; + } + else + attach = Note_head::stem_attachment_coordinate(f, X_AXIS); + Direction d = get_direction (me); - r = head_wid[d] - d * rule_thick ; + + Real real_attach = head_wid.linear_combination (d * attach); + + r = real_attach; + + /* + If not centered: correct for stem thickness. + */ + if (attach) + { + Real rule_thick + = gh_scm2double (me->get_grob_property ("thickness")) + * me->get_paper ()->get_var ("linethickness"); + + + r += - d * rule_thick * 0.5; + } } return gh_double2scm (r); } -Score_element* -Stem::beam_l (Score_element*me) +Grob* +Stem::get_beam (Grob*me) { - SCM b= me->get_elt_property ("beam"); - return unsmob_element (b); + SCM b= me->get_grob_property ("beam"); + return unsmob_grob (b); } - // ugh still very long. Stem_info -Stem::calc_stem_info (Score_element*me) +Stem::calc_stem_info (Grob*me) { - Score_element * beam = beam_l (me); - - Direction beam_dir = Directional_element_interface::get (beam); - if (!beam_dir) - { - programming_error ("Beam dir not set."); - beam_dir = UP; - } + SCM up_to_staff = me->get_grob_property ("up-to-staff"); + if (gh_scm2bool(up_to_staff)) { + // Up-to-staff : the stem end out of the staff. - Real staff_space = Staff_symbol_referencer::staff_space (me); - Real half_space = staff_space / 2; - int multiplicity = Beam::get_multiplicity (beam); + /* + FIXME: duplicate code. + */ + int line_count = Staff_symbol_referencer::line_count (me); + + Stem_info si ; + + Direction dir = get_direction (me); + + si.ideal_y_ = dir* (line_count + 1.5); + si.dir_ = dir; + si.shortest_y_ = si.ideal_y_; + + return si; + } + + SCM scm_info = me->get_grob_property ("stem-info"); + if (gh_pair_p (scm_info )) + { + Stem_info si ; - SCM space_proc = beam->get_elt_property ("space-function"); - SCM space = gh_call1 (space_proc, gh_int2scm (multiplicity)); - Real interbeam_f = gh_scm2double (space) * staff_space; + si.dir_ = Directional_element_interface::get(me); + si.ideal_y_ = gh_scm2double (gh_car (scm_info)); + si.shortest_y_ = gh_scm2double (gh_cadr (scm_info)); - Real thick = gh_scm2double (beam->get_elt_property ("thickness")); - Stem_info info; - info.idealy_f_ = chord_start_f (me); + return si; + } - // for simplicity, we calculate as if dir == UP - info.idealy_f_ *= beam_dir; - SCM grace_prop = me->get_elt_property ("grace"); + Direction mydir = Directional_element_interface::get (me); + Real staff_space = Staff_symbol_referencer::staff_space (me); + Real half_space = staff_space / 2; - bool grace_b = to_boolean (grace_prop); + Grob * beam = get_beam (me); + int beam_count = beam_multiplicity(me).length()+1; + Real beam_translation= Beam::get_beam_translation (beam); + Real thick = gh_scm2double (beam->get_grob_property ("thickness")); + Real note_start = chord_start_y (me); - Array a; - SCM s; + /* from here on, calculate as if dir == UP */ + note_start *= mydir; - s = me->get_elt_property("beamed-minimum-lengths"); - a.clear (); - for (SCM q = s; q != SCM_EOL; q = gh_cdr (q)) - a.push (gh_scm2double (gh_car (q))); + SCM grace_prop = me->get_grob_property ("grace"); + + bool grace_b = to_boolean (grace_prop); + SCM bml = robust_list_ref ( beam_count , + me->get_grob_property ("beamed-minimum-lengths")); + Real minimum_length = gh_scm2double(bml)*staff_space; + SCM bl = robust_list_ref ( beam_count , + me->get_grob_property ("beamed-lengths")); + Real stem_length = gh_scm2double(bl) * staff_space; - Real minimum_length = a[multiplicity get_elt_property ("beamed-lengths"); - a.clear(); - for (SCM q = s; q != SCM_EOL; q = gh_cdr (q)) - a.push (gh_scm2double (gh_car (q))); + /* + stem goes to center of beam, hence 0.5 + */ + Real beam_lengthen = beam_translation* (beam_count - 1) + + ((beam_count > 0) ? thick : 0) - 0.5 * thick; - Real stem_length = a[multiplicity get_elt_property ("no-stem-extend")); - if (!grace_b && !no_extend_b) - { - /* highest beam of (UP) beam must never be lower than middle - staffline - lowest beam of (UP) beam must never be lower than second staffline - */ - info.miny_f_ = - info.miny_f_ >? 0 - >? (- 2 * half_space - thick - + (multiplicity > 0) * thick - + interbeam_f * (multiplicity - 1)); - } - } - else - /* knee */ + Add: not for knees. Not sure if that's is a good thing. + */ + bool no_extend_b = to_boolean (me->get_grob_property ("no-stem-extend")); + bool knee_b = to_boolean (beam->get_grob_property ("knee")); + if (!grace_b && !no_extend_b && !knee_b) { - 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; + /* highest beam of (UP) beam must never be lower than middle + staffline + lowest beam of (UP) beam must never be lower than second staffline + */ + ideal_y = + ideal_y >? 0 + >? (- 2 * half_space - thick + beam_lengthen); } + - info.idealy_f_ = (info.maxy_f_ ? info.miny_f_; - - s = beam->get_elt_property ("shorten"); + // ideal_y = ideal_y >? shortest_y; + SCM s = beam->get_grob_property ("shorten"); if (gh_number_p (s)) - info.idealy_f_ -= gh_scm2double (s); - - Real interstaff_f = -beam_dir* calc_interstaff_dist (dynamic_cast (me), dynamic_cast (beam)); + ideal_y -= gh_scm2double (s); - info.idealy_f_ += interstaff_f; - info.miny_f_ += interstaff_f; - info.maxy_f_ += interstaff_f ; - - return info; + + ideal_y *= mydir; + shortest_y *= mydir; + + me->set_grob_property ("stem-info", + scm_list_n (gh_double2scm (ideal_y), + gh_double2scm (shortest_y), + SCM_UNDEFINED)); + + Stem_info si; + si.dir_ = mydir; + si.shortest_y_ = shortest_y; + si.ideal_y_ = ideal_y; + + return si; } -bool -Stem::has_interface (Score_element*m) + +// move to stem? +Slice +Stem::beam_multiplicity (Grob *stem) { - return m && m->has_interface (ly_symbol2scm ("stem-interface")); -} + SCM beaming= stem->get_grob_property ("beaming"); + Slice l = int_list_to_slice (gh_car (beaming)); + Slice r = int_list_to_slice (gh_cdr (beaming)); + l.unite (r); -void -Stem::set_interface (Score_element*me) -{ - me->set_interface (ly_symbol2scm ("stem-interface")); + return l; } + + +ADD_INTERFACE (Stem,"stem-interface", + "A stem", + "up-to-staff avoid-note-head adjust-if-on-staffline thickness stem-info beamed-lengths beamed-minimum-lengths lengths beam stem-shorten duration-log beaming neutral-direction stem-end-position support-head note-heads direction length style no-stem-extend flag-style dir-forced"); + +