X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fstem.cc;h=d5555a1e72633629f7e09a6a81f67da9e4602433;hb=75eebcb49e52d296b1da3e1074e0825d2c780db4;hp=f964895964e3e5a8e2fa59c3b6fd253d224ca419;hpb=1e0413d626643796546674de541493b30057524b;p=lilypond.git diff --git a/lily/stem.cc b/lily/stem.cc index f964895964..d5555a1e72 100644 --- a/lily/stem.cc +++ b/lily/stem.cc @@ -3,8 +3,8 @@ source file of the GNU LilyPond music typesetter - (c) 1996--2004 Han-Wen Nienhuys - Jan Nieuwenhuizen + (c) 1996--2006 Han-Wen Nienhuys + Jan Nieuwenhuizen TODO: This is way too hairy @@ -13,24 +13,24 @@ Stem-end, chord-start, etc. is all confusing naming. */ -#include // rint +#include "stem.hh" + +#include // rint +using namespace std; #include "lookup.hh" #include "directional-element-interface.hh" #include "note-head.hh" -#include "stem.hh" #include "warn.hh" #include "output-def.hh" #include "rhythmic-head.hh" #include "font-interface.hh" -#include "stencil.hh" #include "paper-column.hh" #include "misc.hh" #include "beam.hh" #include "rest.hh" -#include "group-interface.hh" +#include "pointer-group-interface.hh" #include "staff-symbol-referencer.hh" -#include "spanner.hh" #include "side-position-interface.hh" #include "dot-column.hh" #include "stem-tremolo.hh" @@ -40,7 +40,7 @@ Stem::set_beaming (Grob *me, int beam_count, Direction d) { SCM pair = me->get_property ("beaming"); - if (!ly_c_pair_p (pair)) + if (!scm_is_pair (pair)) { pair = scm_cons (SCM_EOL, SCM_EOL); me->set_property ("beaming", pair); @@ -48,7 +48,7 @@ Stem::set_beaming (Grob *me, int beam_count, Direction d) SCM lst = index_get_cell (pair, d); for (int i = 0; i < beam_count; i++) - lst = scm_cons (scm_int2num (i), lst); + lst = scm_cons (scm_from_int (i), lst); index_set_cell (pair, d, lst); } @@ -56,20 +56,19 @@ int Stem::get_beaming (Grob *me, Direction d) { SCM pair = me->get_property ("beaming"); - if (!ly_c_pair_p (pair)) + if (!scm_is_pair (pair)) return 0; SCM lst = index_get_cell (pair, d); return scm_ilength (lst); } - Interval Stem::head_positions (Grob *me) { if (head_count (me)) { - Drul_array e (extremal_heads (me)); + Drul_array e (extremal_heads (me)); return Interval (Staff_symbol_referencer::get_position (e[DOWN]), Staff_symbol_referencer::get_position (e[UP])); } @@ -81,51 +80,23 @@ Stem::chord_start_y (Grob *me) { Interval hp = head_positions (me); if (!hp.is_empty ()) - return hp[get_direction (me)] * Staff_symbol_referencer::staff_space (me) + return hp[get_grob_direction (me)] * Staff_symbol_referencer::staff_space (me) * 0.5; return 0; } -Real -Stem::stem_end_position (Grob *me) -{ - SCM p = me->get_property ("stem-end-position"); - Real pos; - if (!ly_c_number_p (p)) - { - pos = get_default_stem_end_position (me); - me->set_property ("stem-end-position", scm_make_real (pos)); - } - else - pos = ly_scm2double (p); - - return pos; -} - -Direction -Stem::get_direction (Grob *me) -{ - Direction d = get_grob_direction (me); - if (!d) - { - d = get_default_dir (me); - // urg, AAARGH! - set_grob_direction (me, d); - } - return d; -} void Stem::set_stemend (Grob *me, Real se) { // todo: margins - Direction d = get_direction (me); + Direction d = get_grob_direction (me); - if (d && d * head_positions (me)[get_direction (me)] >= se*d) - me->warning (_ ("Weird stem size; check for narrow beams")); + if (d && d * head_positions (me)[get_grob_direction (me)] >= se * d) + me->warning (_ ("weird stem size, check for narrow beams")); - me->set_property ("stem-end-position", scm_make_real (se)); + me->set_property ("stem-end-position", scm_from_double (se)); } /* Note head that determines hshift for upstems @@ -133,16 +104,17 @@ Stem::set_stemend (Grob *me, Real se) Grob * Stem::support_head (Grob *me) { - if (head_count (me) == 1) - /* UGH. */ - return unsmob_grob (ly_car (me->get_property ("note-heads"))); + extract_grob_set (me, "note-heads", heads); + if (heads.size () == 1) + return heads[0]; + return first_head (me); } int Stem::head_count (Grob *me) { - return Pointer_group_interface::count (me, "note-heads"); + return Pointer_group_interface::count (me, ly_symbol2scm ("note-heads")); } /* The note head which forms one end of the stem. @@ -150,7 +122,7 @@ Stem::head_count (Grob *me) Grob * Stem::first_head (Grob *me) { - Direction d = get_direction (me); + Direction d = get_grob_direction (me); if (d) return extremal_heads (me)[-d]; return 0; @@ -160,18 +132,18 @@ Stem::first_head (Grob *me) Grob * Stem::last_head (Grob *me) { - Direction d = get_direction (me); + Direction d = get_grob_direction (me); if (d) return extremal_heads (me)[d]; - return 0; + return 0; } -/* START is part where stem reaches `last' head. - -This function returns a drul with (bottom-head, top-head). +/* + START is part where stem reaches `last' head. + This function returns a drul with (bottom-head, top-head). */ -Drul_array +Drul_array Stem::extremal_heads (Grob *me) { const int inf = 1000000; @@ -179,13 +151,12 @@ Stem::extremal_heads (Grob *me) extpos[DOWN] = inf; extpos[UP] = -inf; - Drul_array exthead; - exthead[LEFT] = exthead[RIGHT] =0; + Drul_array exthead (0, 0); + extract_grob_set (me, "note-heads", heads); - for (SCM s = me->get_property ("note-heads"); ly_c_pair_p (s); - s = ly_cdr (s)) + for (int i = heads.size (); i--;) { - Grob *n = unsmob_grob (ly_car (s)); + Grob *n = heads[i]; int p = Staff_symbol_referencer::get_rounded_position (n); Direction d = LEFT; @@ -196,13 +167,14 @@ Stem::extremal_heads (Grob *me) exthead[d] = n; extpos[d] = p; } - } while (flip (&d) != DOWN); + } + while (flip (&d) != DOWN); } return exthead; } static int -icmp (int const &a, int const &b) +integer_compare (int const &a, int const &b) { return a - b; } @@ -211,93 +183,133 @@ icmp (int const &a, int const &b) Array Stem::note_head_positions (Grob *me) { - Array ps ; - for (SCM s = me->get_property ("note-heads"); ly_c_pair_p (s); - s = ly_cdr (s)) + Array ps; + extract_grob_set (me, "note-heads", heads); + + for (int i = heads.size (); i--;) { - Grob *n = unsmob_grob (ly_car (s)); + Grob *n = heads[i]; int p = Staff_symbol_referencer::get_rounded_position (n); ps.push (p); } - ps.sort (icmp); + ps.sort (integer_compare); return ps; } void Stem::add_head (Grob *me, Grob *n) { - n->set_property ("stem", me->self_scm ()); - n->add_dependency (me); + n->set_object ("stem", me->self_scm ()); - /* TODO: why not store Rest pointers? */ if (Note_head::has_interface (n)) Pointer_group_interface::add_grob (me, ly_symbol2scm ("note-heads"), n); + else if (Rest::has_interface (n)) + Pointer_group_interface::add_grob (me, ly_symbol2scm ("rests"), n); } bool Stem::is_invisible (Grob *me) { - return !(head_count (me) - && ly_scm2int (me->get_property ("duration-log")) >= 1); + Real stemlet_length = robust_scm2double (me->get_property ("stemlet-length"), + 0.0); + + return !((head_count (me) + || stemlet_length > 0.0) + && scm_to_int (me->get_property ("duration-log")) >= 1); } -Direction -Stem::get_default_dir (Grob *me) +MAKE_SCHEME_CALLBACK (Stem, calc_stem_end_position, 1) +SCM +Stem::calc_stem_end_position (SCM smob) { - int staff_center = 0; + Grob *me = unsmob_grob (smob); + + if (!head_count (me)) + return scm_from_double (0.0); + + + Real ss = Staff_symbol_referencer::staff_space (me); + int durlog = duration_log (me); + Array a; + + /* WARNING: IN HALF SPACES */ + Real length = robust_scm2double (me->get_property ("length"), 7); + + Direction dir = get_grob_direction (me); Interval hp = head_positions (me); - if (hp.is_empty ()) - return CENTER; + Real stem_end = dir ? hp[dir] + dir * length : 0; - int udistance = (int) (UP * hp[UP] - staff_center); - int ddistance = (int) (DOWN * hp[DOWN] - staff_center); + /* TODO: change name to extend-stems to staff/center/'() */ + bool no_extend_b = to_boolean (me->get_property ("no-stem-extend")); + if (!no_extend_b && dir * stem_end < 0) + stem_end = 0.0; - if (sign (ddistance - udistance)) - return Direction (sign (ddistance - udistance)); + + /* 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 + && durlog > 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 / ss; - return to_dir (me->get_property ("neutral-direction")); + /* Very gory: add myself to the X-support of the parent, + which should be a dot-column. */ + if (dir * (stem_end + 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. */ + } + } + } + } + + return scm_from_double (stem_end); } -Real -Stem::get_default_stem_end_position (Grob *me) + +MAKE_SCHEME_CALLBACK (Stem, calc_length, 1) +SCM +Stem::calc_length (SCM smob) { - Real ss = Staff_symbol_referencer::staff_space (me); + Grob *me = unsmob_grob (smob); + + SCM details = me->get_property ("details"); int durlog = duration_log (me); - SCM s; - Array a; - /* WARNING: IN HALF SPACES */ + Real ss = Staff_symbol_referencer::staff_space (me); Real length = 7; - SCM scm_len = me->get_property ("length"); - if (ly_c_number_p (scm_len)) - length = ly_scm2double (scm_len); - else - { - s = me->get_property ("lengths"); - if (ly_c_pair_p (s)) - length = 2 * ly_scm2double (robust_list_ref (durlog - 2, s)); - } + SCM s = scm_cdr (scm_assq (ly_symbol2scm ("lengths"), details)); + if (scm_is_pair (s)) + length = 2 * scm_to_double (robust_list_ref (durlog - 2, s)); - /* URGURGURG - 'set-default-stemlen' sets direction too. */ - Direction dir = get_direction (me); - if (!dir) - { - dir = get_default_dir (me); - set_grob_direction (me, dir); - } + Direction dir = get_grob_direction (me); /* Stems in unnatural (forced) direction should be shortened, according to [Roush & Gourlay] */ Interval hp = head_positions (me); if (dir && dir * hp[dir] >= 0) { - SCM sshorten = me->get_property ("stem-shorten"); - SCM scm_shorten = ly_c_pair_p (sshorten) ? - robust_list_ref ((duration_log (me) - 2) >? 0, sshorten): SCM_EOL; - Real shorten = 2* robust_scm2double (scm_shorten,0); + SCM sshorten = scm_cdr (scm_assq (ly_symbol2scm ("stem-shorten"), details)); + SCM scm_shorten = scm_is_pair (sshorten) + ? robust_list_ref (max (duration_log (me) - 2, 0), sshorten) : SCM_EOL; + Real shorten = 2* robust_scm2double (scm_shorten, 0); /* On boundary: shorten only half */ if (abs (head_positions (me)[dir]) <= 1) @@ -306,17 +318,19 @@ Stem::get_default_stem_end_position (Grob *me) length -= shorten; } + length *= robust_scm2double (me->get_property ("length-fraction"), 1.0); + /* Tremolo stuff. */ - Grob *t_flag = unsmob_grob (me->get_property ("tremolo-flag")); - if (t_flag && !unsmob_grob (me->get_property ("beam"))) + Grob *t_flag = unsmob_grob (me->get_object ("tremolo-flag")); + if (t_flag && !unsmob_grob (me->get_object ("beam"))) { /* Crude hack: add extra space if tremolo flag is there. - We can't do this for the beam, since we get into a loop - (Stem_tremolo::raw_stencil () looks at the beam.) --hwn */ + We can't do this for the beam, since we get into a loop + (Stem_tremolo::raw_stencil () looks at the beam.) --hwn */ Real minlen = 1.0 - + 2 * Stem_tremolo::raw_stencil (t_flag).extent (Y_AXIS).length () + + 2 * Stem_tremolo::raw_stencil (t_flag).extent (Y_AXIS).length () / ss; if (durlog >= 3) @@ -330,70 +344,31 @@ Stem::get_default_stem_end_position (Grob *me) if (dir == DOWN) minlen -= 1.0; } - length = length >? (minlen + 1.0); - } - - Real st = dir ? hp[dir] + dir * length : 0; - - /* TODO: change name to extend-stems to staff/center/'() */ - bool no_extend_b = to_boolean (me->get_property ("no-stem-extend")); - if (!no_extend_b && dir * st < 0) - 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 - && durlog > 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 / ss; - - /* 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. */ - } - } - } + length = max (length, minlen + 1.0); } - return st; + + return scm_from_double (length); } - /* The log of the duration (Number of hooks on the flag minus two) */ int Stem::duration_log (Grob *me) { SCM s = me->get_property ("duration-log"); - return (ly_c_number_p (s)) ? ly_scm2int (s) : 2; + return (scm_is_number (s)) ? scm_to_int (s) : 2; } -void -Stem::position_noteheads (Grob *me) +MAKE_SCHEME_CALLBACK(Stem, calc_positioning_done, 1); +SCM +Stem::calc_positioning_done (SCM smob) { + Grob *me = unsmob_grob (smob); if (!head_count (me)) - return; - - Link_array heads = - Pointer_group_interface__extract_grobs (me, (Grob*) 0, "note-heads"); + return SCM_BOOL_T; + extract_grob_set (me, "note-heads", ro_heads); + Link_array heads (ro_heads); heads.sort (compare_position); - Direction dir = get_direction (me); + Direction dir = get_grob_direction (me); if (dir < 0) heads.reverse (); @@ -401,30 +376,36 @@ Stem::position_noteheads (Grob *me) Real thick = thickness (me); Grob *hed = support_head (me); - Real w = Note_head::head_extent (hed,X_AXIS)[dir]; + if (!dir) + { + programming_error ("Stem dir must be up or down."); + dir = UP; + set_grob_direction (me, dir); + } + + Real w = hed->extent (hed, X_AXIS)[dir]; for (int i = 0; i < heads.size (); i++) - heads[i]->translate_axis (w - Note_head::head_extent (heads[i], - X_AXIS)[dir], + heads[i]->translate_axis (w - heads[i]->extent (heads[i], X_AXIS)[dir], X_AXIS); bool parity = true; Real lastpos = Real (Staff_symbol_referencer::get_position (heads[0])); - for (int i = 1; i < heads.size (); i ++) + for (int i = 1; i < heads.size (); i++) { Real p = Staff_symbol_referencer::get_position (heads[i]); - Real dy =fabs (lastpos- p); + Real dy = fabs (lastpos- p); /* - dy should always be 0.5, 0.0, 1.0, but provide safety margin - for rounding errors. + dy should always be 0.5, 0.0, 1.0, but provide safety margin + for rounding errors. */ - if (dy < 1.1) + if (dy < 1.1) { if (parity) { - Real ell = Note_head::head_extent (heads[i], X_AXIS).length (); + Real ell = heads[i]->extent (heads[i], X_AXIS).length (); - Direction d = get_direction (me); + Direction d = get_grob_direction (me); /* Reversed head should be shifted ell-thickness, but this looks too crowded, so we only shift ell-0.5*thickness. @@ -442,18 +423,18 @@ Stem::position_noteheads (Grob *me) heads[i]->translate_axis (-thick * (2 - reverse_overlap) * d, X_AXIS); - /* TODO: - + /* 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 <- kern this. + | X - + */ } parity = !parity; @@ -463,78 +444,115 @@ Stem::position_noteheads (Grob *me) lastpos = int (p); } + + return SCM_BOOL_T; } -MAKE_SCHEME_CALLBACK (Stem,before_line_breaking,1); +MAKE_SCHEME_CALLBACK(Stem, calc_direction, 1); SCM -Stem::before_line_breaking (SCM smob) +Stem::calc_direction (SCM smob) { Grob *me = unsmob_grob (smob); - - /* - Do the calculations for visible stems, but also for invisible stems - with note heads (i.e. half notes.) - */ - if (head_count (me)) + Direction dir = CENTER; + if (Grob *beam = unsmob_grob (me->get_object ("beam"))) { - stem_end_position (me); // ugh. Trigger direction calc. - position_noteheads (me); + SCM ignore_me = beam->get_property ("direction"); + (void) ignore_me; + dir = get_grob_direction (me); } else - me->set_property ("print-function", SCM_EOL); + { + SCM dd = me->get_property ("default-direction"); + dir = to_dir (dd); + if (!dir) + return me->get_property ("neutral-direction"); + } - return SCM_UNSPECIFIED; + return scm_from_int (dir); } -/* - ugh. - When in a beam with tuplet brackets, brew_mol is called early, - caching a wrong value. - */ -MAKE_SCHEME_CALLBACK (Stem, height, 2); +MAKE_SCHEME_CALLBACK(Stem, calc_default_direction, 1); SCM -Stem::height (SCM smob, SCM ax) +Stem::calc_default_direction (SCM smob) { - Axis a = (Axis)ly_scm2int (ax); Grob *me = unsmob_grob (smob); - assert (a == Y_AXIS); - /* - ugh. - this dependency should be automatic. + Direction dir = CENTER; + int staff_center = 0; + Interval hp = head_positions (me); + if (!hp.is_empty ()) + { + int udistance = (int) (UP * hp[UP] - staff_center); + int ddistance = (int) (DOWN * hp[DOWN] - staff_center); + + dir = Direction (sign (ddistance - udistance)); + } + + return scm_from_int (dir); +} + + +MAKE_SCHEME_CALLBACK (Stem, height, 1); +SCM +Stem::height (SCM smob) +{ + Grob *me = unsmob_grob (smob); + + Direction dir = get_grob_direction (me); + + /* Trigger callback. + + UGH. Should be automatic */ - Grob *beam= get_beam (me); + Grob *beam = get_beam (me); if (beam) { - Beam::after_line_breaking (beam->self_scm ()); + beam->get_property ("positions"); } - - SCM mol = me->get_uncached_stencil (); - Interval iv; - if (mol != SCM_EOL) - iv = unsmob_stencil (mol)->extent (a); - if (Grob *b =get_beam (me)) + /* + Can't get_stencil(), since that would cache stencils too early. + This causes problems with beams. + */ + Stencil *stencil = unsmob_stencil (print (smob)); + Interval iv = stencil ? stencil->extent (Y_AXIS) : Interval(); + if (beam) { - Direction d = get_direction (me); - iv[d] += d * Beam::get_thickness (b) * 0.5 ; + if (dir == CENTER) + { + programming_error ("no stem direction"); + dir = UP; + } + iv[dir] += dir * Beam::get_thickness (beam) * 0.5; } return ly_interval2scm (iv); } +Real +Stem::stem_end_position (Grob *me) +{ + return robust_scm2double (me->get_property ("stem-end-position"), 0); +} Stencil Stem::flag (Grob *me) { - /* TODO: maybe property stroke-style should take different values, - e.g. "" (i.e. no stroke), "single" and "double" (currently, it's - '() or "grace"). */ + int log = duration_log (me); + if (log < 3 + || unsmob_grob (me->get_object ("beam"))) + return Stencil (); + + /* + TODO: maybe property stroke-style should take different values, + e.g. "" (i.e. no stroke), "single" and "double" (currently, it's + '() or "grace"). */ String flag_style; SCM flag_style_scm = me->get_property ("flag-style"); - if (ly_c_symbol_p (flag_style_scm)) + if (scm_is_symbol (flag_style_scm)) flag_style = ly_symbol2string (flag_style_scm); - + if (flag_style == "no-flag") return Stencil (); @@ -551,61 +569,33 @@ Stem::flag (Grob *me) */ { 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. - */ - int p = Staff_symbol_referencer::get_rounded_position (me); - staffline_offs = Staff_symbol_referencer::on_staffline (me, p) - ? "1" : "0"; + { + int p = (int) (rint (stem_end_position (me))); + staffline_offs + = Staff_symbol_referencer::on_staffline (me, p) ? "0" : "1"; } else - { - staffline_offs = "2"; - } + staffline_offs = "2"; } else - { - staffline_offs = ""; - } + staffline_offs = ""; - char dir = (get_direction (me) == UP) ? 'u' : 'd'; + char dir = (get_grob_direction (me) == UP) ? 'u' : 'd'; String font_char = flag_style - + to_string (dir) + staffline_offs + to_string (duration_log (me)); + + to_string (dir) + staffline_offs + to_string (log); Font_metric *fm = Font_interface::get_default_font (me); - Stencil flag = fm->find_by_name ("flags-" + font_char); + Stencil flag = fm->find_by_name ("flags." + font_char); if (flag.is_empty ()) me->warning (_f ("flag `%s' not found", font_char)); SCM stroke_style_scm = me->get_property ("stroke-style"); - if (ly_c_string_p (stroke_style_scm)) + if (scm_is_string (stroke_style_scm)) { String stroke_style = ly_scm2string (stroke_style_scm); if (!stroke_style.is_empty ()) { String font_char = to_string (dir) + stroke_style; - Stencil stroke = fm->find_by_name ("flags-" + font_char); + Stencil stroke = fm->find_by_name ("flags." + font_char); if (stroke.is_empty ()) me->warning (_f ("flag stroke `%s' not found", font_char)); else @@ -616,26 +606,34 @@ Stem::flag (Grob *me) return flag; } -MAKE_SCHEME_CALLBACK (Stem,dim_callback,2); +MAKE_SCHEME_CALLBACK (Stem, width, 1); SCM -Stem::dim_callback (SCM e, SCM ax) +Stem::width (SCM e) { - Axis a = (Axis) ly_scm2int (ax); - assert (a == X_AXIS); Grob *me = unsmob_grob (e); - Interval r (0, 0); - if (unsmob_grob (me->get_property ("beam")) || abs (duration_log (me)) <= 2) - ; // TODO! + + Interval r; + + if (is_invisible (me)) + r.set_empty (); + else if (unsmob_grob (me->get_object ("beam")) + || abs (duration_log (me)) <= 2) + { + r = Interval (-1, 1); + r *= thickness (me) / 2; + } else - r = flag (me).extent (X_AXIS) - + thickness (me)/2; + { + r = Interval (-1, 1) * thickness (me) * 0.5; + r.unite (flag (me).extent (X_AXIS)); + } return ly_interval2scm (r); } Real Stem::thickness (Grob *me) { - return ly_scm2double (me->get_property ("thickness")) + return scm_to_double (me->get_property ("thickness")) * Staff_symbol_referencer::line_thickness (me); } @@ -645,157 +643,206 @@ Stem::print (SCM smob) { Grob *me = unsmob_grob (smob); Stencil mol; - Direction d = get_direction (me); + Direction d = get_grob_direction (me); + + Real stemlet_length = robust_scm2double (me->get_property ("stemlet-length"), + 0.0); + bool stemlet = stemlet_length > 0.0; /* TODO: make the stem start a direction ? This is required to avoid stems passing in tablature chords. */ - Grob *lh = to_boolean (me->get_property ("avoid-note-head")) - ? last_head (me) : lh = first_head (me); + Grob *lh + = to_boolean (me->get_property ("avoid-note-head")) + ? last_head (me) + : first_head (me); + Grob *beam = get_beam (me); + + if (!lh && !stemlet) + return SCM_EOL; - if (!lh) + if (!lh && stemlet && !beam) return SCM_EOL; if (is_invisible (me)) return SCM_EOL; - Real y1 = Staff_symbol_referencer::get_position (lh); - Real y2 = stem_end_position (me); + Real y2 = robust_scm2double (me->get_property ("stem-end-position"), 0.0); + Real y1 = y2; + Real half_space = Staff_symbol_referencer::staff_space (me) * 0.5; - Interval stem_y (y1 ? y1); + if (lh) + y2 = Staff_symbol_referencer::get_position (lh); + else if (stemlet) + { + Real beam_translation = Beam::get_beam_translation (beam); + Real beam_thickness = Beam::get_thickness (beam); + int beam_count = beam_multiplicity (me).length () + 1; + + y2 -= d + * (0.5 * beam_thickness + + beam_translation * max (0, (beam_count - 1)) + + stemlet_length) / half_space; + } - // dy? - Real dy = Staff_symbol_referencer::staff_space (me) * 0.5; + Interval stem_y (min (y1, y2), max (y2, y1)); - if (Grob *hed = support_head (me)) + if (Grob *head = 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); + */ + Interval head_height = head->extent (head, Y_AXIS); + Real y_attach = Note_head::stem_attachment_coordinate (head, Y_AXIS); y_attach = head_height.linear_combination (y_attach); - stem_y[Direction (-d)] += d * y_attach/dy; + stem_y[Direction (-d)] += d * y_attach / half_space; } - // URG Real stem_width = thickness (me); - Real blot = - me->get_paper ()->get_dimension (ly_symbol2scm ("blotdiameter")); + Real blot + = me->layout ()->get_dimension (ly_symbol2scm ("blotdiameter")); - Box b = Box (Interval (-stem_width/2, stem_width/2), - Interval (stem_y[DOWN]*dy, stem_y[UP]*dy)); + Box b = Box (Interval (-stem_width / 2, stem_width / 2), + Interval (stem_y[DOWN] * half_space, stem_y[UP] * half_space)); Stencil ss = Lookup::round_filled_box (b, blot); mol.add_stencil (ss); - if (!get_beam (me) && abs (duration_log (me)) > 2) - { - Stencil fl = flag (me); - fl.translate_axis (stem_y[d]*dy - d * blot/2, Y_AXIS); - fl.translate_axis (stem_width/2, X_AXIS); - mol.add_stencil (fl); - } + mol.add_stencil (get_translated_flag (me)); return mol.smobbed_copy (); } +Stencil +Stem::get_translated_flag (Grob *me) +{ + Stencil fl = flag (me); + if (!fl.is_empty ()) + { + Direction d = get_grob_direction (me); + Real blot + = me->layout ()->get_dimension (ly_symbol2scm ("blotdiameter")); + Real stem_width = thickness (me); + Real half_space = Staff_symbol_referencer::staff_space (me) * 0.5; + Real y2 = robust_scm2double (me->get_property ("stem-end-position"), 0.0); + fl.translate_axis (y2 * half_space - d * blot / 2, Y_AXIS); + fl.translate_axis (stem_width / 2, X_AXIS); + } + return fl; +} + + /* move the stem to right of the notehead if it is up. - */ -MAKE_SCHEME_CALLBACK (Stem, off_callback, 2); +*/ +MAKE_SCHEME_CALLBACK (Stem, offset_callback, 1); SCM -Stem::off_callback (SCM element_smob, SCM) +Stem::offset_callback (SCM smob) { - Grob *me = unsmob_grob (element_smob); + Grob *me = unsmob_grob (smob); Real r = 0.0; - - if (head_count (me)) - if (Grob *f = first_head (me)) - { - Interval head_wid = Note_head::head_extent (f, X_AXIS); - Real attach = 0.0; - - if (is_invisible (me)) - attach = 0.0; - else + + if (Grob *f = first_head (me)) + { + Interval head_wid = f->extent (f, X_AXIS); + Real attach = 0.0; + + if (is_invisible (me)) + attach = 0.0; + else attach = Note_head::stem_attachment_coordinate (f, X_AXIS); - - Direction d = get_direction (me); - Real real_attach = head_wid.linear_combination (d * attach); - r = real_attach; - - /* If not centered: correct for stem thickness. */ - if (attach) - { - Real rule_thick = thickness (me); - r += - d * rule_thick * 0.5; - } - } - return scm_make_real (r); + + Direction d = get_grob_direction (me); + Real real_attach = head_wid.linear_combination (d * attach); + r = real_attach; + + /* If not centered: correct for stem thickness. */ + if (attach) + { + Real rule_thick = thickness (me); + r += -d * rule_thick * 0.5; + } + } + else + { + extract_grob_set (me, "rests", rests); + if (rests.size ()) + { + Grob *rest = rests.top (); + r = rest->extent (rest, X_AXIS).center (); + } + } + return scm_from_double (r); } -Grob * +Spanner * Stem::get_beam (Grob *me) { - SCM b = me->get_property ("beam"); - return unsmob_grob (b); + SCM b = me->get_object ("beam"); + return dynamic_cast (unsmob_grob (b)); } Stem_info Stem::get_stem_info (Grob *me) { - /* Return cached info if available */ - SCM scm_info = me->get_property ("stem-info"); - if (!ly_c_pair_p (scm_info)) - { - calc_stem_info (me); - scm_info = me->get_property ("stem-info"); - } - Stem_info si; si.dir_ = get_grob_direction (me); - si.ideal_y_ = ly_scm2double (ly_car (scm_info)); - si.shortest_y_ = ly_scm2double (ly_cadr (scm_info)); + + SCM scm_info = me->get_property ("stem-info"); + si.ideal_y_ = scm_to_double (scm_car (scm_info)); + si.shortest_y_ = scm_to_double (scm_cadr (scm_info)); return si; } - /* TODO: add extra space for tremolos! */ -void -Stem::calc_stem_info (Grob *me) +MAKE_SCHEME_CALLBACK(Stem, calc_stem_info, 1); +SCM +Stem::calc_stem_info (SCM smob) { + Grob *me = unsmob_grob (smob); Direction my_dir = get_grob_direction (me); if (!my_dir) { - programming_error ("No stem dir set?"); - my_dir = UP; + programming_error ("no stem dir set"); + my_dir = UP; } Real staff_space = Staff_symbol_referencer::staff_space (me); Grob *beam = get_beam (me); + + if (beam) + { + (void) beam->get_property ("beaming"); + } + Real beam_translation = Beam::get_beam_translation (beam); Real beam_thickness = Beam::get_thickness (beam); int beam_count = Beam::get_direction_beam_count (beam, my_dir); - + Real length_fraction + = robust_scm2double (me->get_property ("length-fraction"), 1.0); /* Simple standard stem length */ - SCM lengths = me->get_property ("beamed-lengths"); - Real ideal_length = - ly_scm2double (robust_list_ref (beam_count - 1,lengths)) - + SCM details = me->get_property ("details"); + SCM lengths = scm_cdr (scm_assq (ly_symbol2scm ("beamed-lengths"), details)); + + Real ideal_length + = scm_to_double (robust_list_ref (beam_count - 1, lengths)) * staff_space - /* stem only extends to center of beam */ + * length_fraction + + /* stem only extends to center of beam + */ - 0.5 * beam_thickness; /* Condition: sane minimum free stem length (chord to beams) */ - lengths = me->get_property ("beamed-minimum-free-lengths"); - Real ideal_minimum_free = - ly_scm2double (robust_list_ref (beam_count - 1, lengths)) - * staff_space; + lengths = scm_cdr (scm_assq (ly_symbol2scm ("beamed-minimum-free-lengths"), details)); + Real ideal_minimum_free + = scm_to_double (robust_list_ref (beam_count - 1, lengths)) + * staff_space + * length_fraction; /* UGH It seems that also for ideal minimum length, we must use @@ -812,91 +859,130 @@ Stem::calc_stem_info (Grob *me) /* stem only extends to center of beam */ - 0.5 * beam_thickness; - ideal_length = ideal_length >? ideal_minimum_length; + ideal_length = max (ideal_length, ideal_minimum_length); /* Convert to Y position, calculate for dir == UP */ - Real note_start = - /* staff positions */ + Real note_start + = /* staff positions */ head_positions (me)[my_dir] * 0.5 * my_dir * staff_space; Real ideal_y = note_start + ideal_length; - /* Conditions for Y position */ /* Lowest beam of (UP) beam must never be lower than second staffline - Reference? + Reference? - Although this (additional) rule is probably correct, - I expect that highest beam (UP) should also never be lower - than middle staffline, just as normal stems. + Although this (additional) rule is probably correct, + I expect that highest beam (UP) should also never be lower + than middle staffline, just as normal stems. - Reference? + Reference? - Obviously not for grace beams. + Obviously not for grace beams. - Also, not for knees. Seems to be a good thing. */ + Also, not for knees. Seems to be a good thing. */ bool no_extend_b = to_boolean (me->get_property ("no-stem-extend")); bool is_knee = to_boolean (beam->get_property ("knee")); if (!no_extend_b && !is_knee) { /* Highest beam of (UP) beam must never be lower than middle staffline */ - ideal_y = ideal_y >? 0; + ideal_y = max (ideal_y, 0.0); /* Lowest beam of (UP) beam must never be lower than second staffline */ - ideal_y = ideal_y >? (-staff_space - - beam_thickness + height_of_my_beams); + ideal_y = max (ideal_y, (-staff_space + - beam_thickness + height_of_my_beams)); } - ideal_y -= robust_scm2double (beam->get_property ("shorten"), 0); - Real minimum_free = - ly_scm2double (robust_list_ref - (beam_count - 1, - me->get_property - ("beamed-extreme-minimum-free-lengths"))) - * staff_space; + SCM bemfl = scm_cdr (scm_assq (ly_symbol2scm ("beamed-extreme-minimum-free-lengths"), + details)); + + Real minimum_free + = scm_to_double (robust_list_ref (beam_count - 1, bemfl)) + * staff_space + * length_fraction; Real minimum_length = minimum_free + height_of_my_beams /* stem only extends to center of beam */ - 0.5 * beam_thickness; + if (Grob *tremolo = unsmob_grob (me->get_object ("tremolo-flag"))) + { + Interval y_ext = tremolo->extent (tremolo, Y_AXIS); + y_ext.widen (0.5); // FIXME. Should be tunable? + minimum_length = max (minimum_length, y_ext.length ()); + } + ideal_y *= my_dir; Real minimum_y = note_start + minimum_length; Real shortest_y = minimum_y * my_dir; - me->set_property ("stem-info", - scm_list_2 (scm_make_real (ideal_y), - scm_make_real (shortest_y))); + return scm_list_2 (scm_from_double (ideal_y), + scm_from_double (shortest_y)); } Slice Stem::beam_multiplicity (Grob *stem) { - SCM beaming= stem->get_property ("beaming"); - Slice le = int_list_to_slice (ly_car (beaming)); - Slice ri = int_list_to_slice (ly_cdr (beaming)); + SCM beaming = stem->get_property ("beaming"); + Slice le = int_list_to_slice (scm_car (beaming)); + Slice ri = int_list_to_slice (scm_cdr (beaming)); le.unite (ri); return le; } - /* FIXME: Too many properties */ ADD_INTERFACE (Stem, "stem-interface", "The stem represent the graphical stem. " "In addition, it internally connects note heads, beams and" "tremolos. " - "Rests and whole notes have invisible stems.", - "tremolo-flag french-beaming " - "avoid-note-head thickness " - "stem-info beamed-lengths beamed-minimum-free-lengths " - "beamed-extreme-minimum-free-lengths lengths beam stem-shorten " - "duration-log beaming neutral-direction stem-end-position " - "note-heads direction length flag-style " - "no-stem-extend stroke-style"); + "Rests and whole notes have invisible stems." + + "\n\nThe following properties may be set in the details list." + "@table @code\n" + "@item beamed-lengths \n" + "list of stem lengths given beam multiplicity. \n" + "@item beamed-minimum-free-lengths \n" + "list of normal minimum free stem lengths (chord to beams) given beam multiplicity.\n" + "@item beamed-extreme-minimum-free-lengths\n" + "list of extreme minimum free stem lengths (chord to beams) given beam multiplicity.\n" + "@item lengths\n" + "Default stem lengths. The list gives a length for each flag-count.\n" + "@item stem-shorten\n" + "How much a stem in a forced direction " + "should be shortened. The list gives an amount depending on the number " + "of flags/beams." + "@end table\n" + , + + /* properties */ + "avoid-note-head " + "beam " + "beaming " + "default-direction " + "details " + "direction " + "duration-log " + "flag-style " + "french-beaming " + "length " + "length-fraction " + "neutral-direction " + "no-stem-extend " + "note-heads " + "positioning-done " + "rests " + "stem-end-position " + "stem-info " + "stemlet-length " + "stroke-style " + "thickness " + "tremolo-flag " + ); /****************************************************************/