source file of the GNU LilyPond music typesetter
- (c) 1996--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1996--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
TODO: This is way too hairy
Stem-end, chord-start, etc. is all confusing naming.
*/
-#include <math.h> // rint
+#include "stem.hh"
-#include "lookup.hh"
+#include <cmath> // rint
+using namespace std;
+
+#include "beam.hh"
#include "directional-element-interface.hh"
-#include "note-head.hh"
-#include "stem.hh"
-#include "warn.hh"
-#include "paper-def.hh"
-#include "rhythmic-head.hh"
+#include "dot-column.hh"
#include "font-interface.hh"
-#include "stencil.hh"
-#include "paper-column.hh"
+#include "international.hh"
+#include "lookup.hh"
#include "misc.hh"
-#include "beam.hh"
+#include "note-head.hh"
+#include "output-def.hh"
+#include "paper-column.hh"
+#include "pointer-group-interface.hh"
#include "rest.hh"
-#include "group-interface.hh"
-#include "staff-symbol-referencer.hh"
-#include "spanner.hh"
+#include "rhythmic-head.hh"
#include "side-position-interface.hh"
-#include "dot-column.hh"
+#include "staff-symbol-referencer.hh"
#include "stem-tremolo.hh"
+#include "warn.hh"
void
-Stem::set_beaming (Grob*me, int beam_count, Direction d)
+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);
}
- SCM l = index_get_cell (pair, d);
- for (int i = 0; i< beam_count; i++)
- {
- l = scm_cons (scm_int2num (i), l);
- }
- index_set_cell (pair, d, l);
+ SCM lst = index_get_cell (pair, d);
+ if (beam_count)
+ for (int i = 0; i < beam_count; i++)
+ lst = scm_cons (scm_from_int (i), lst);
+ else
+ lst = SCM_BOOL_F;
+
+ index_set_cell (pair, d, lst);
}
-
-Interval
-Stem::head_positions (Grob*me)
+int
+Stem::get_beaming (Grob *me, Direction d)
{
- if (!head_count (me))
- {
- Interval iv;
- return iv;
- }
-
- Drul_array<Grob*> e (extremal_heads (me));
-
- return Interval (Staff_symbol_referencer::get_position (e[DOWN]),
- Staff_symbol_referencer::get_position (e[UP]));
-}
-
+ SCM pair = me->get_property ("beaming");
+ if (!scm_is_pair (pair))
+ return 0;
-Real
-Stem::chord_start_y (Grob*me)
-{
- return head_positions (me)[get_direction (me)]
- * Staff_symbol_referencer::staff_space (me)/2.0;
+ SCM lst = index_get_cell (pair, d);
+ return scm_ilength (lst);
}
-Real
-Stem::stem_end_position (Grob*me)
+Interval
+Stem::head_positions (Grob *me)
{
- SCM p =me->get_property ("stem-end-position");
- Real pos;
- if (!ly_c_number_p (p))
+ if (head_count (me))
{
- pos = get_default_stem_end_position (me);
- me->set_property ("stem-end-position", scm_make_real (pos));
+ Drul_array<Grob *> e (extremal_heads (me));
+ return Interval (Staff_symbol_referencer::get_position (e[DOWN]),
+ Staff_symbol_referencer::get_position (e[UP]));
}
- else
- pos = ly_scm2double (p);
-
- return pos;
+ return Interval ();
}
-Direction
-Stem::get_direction (Grob*me)
+Real
+Stem::chord_start_y (Grob *me)
{
- Direction d = get_grob_direction (me);
-
- if (!d)
- {
- d = get_default_dir (me);
- // urg, AAARGH!
- set_grob_direction (me, d);
- }
- return d ;
+ Interval hp = head_positions (me);
+ if (!hp.is_empty ())
+ return hp[get_grob_direction (me)] * Staff_symbol_referencer::staff_space (me)
+ * 0.5;
+ return 0;
}
+
void
-Stem::set_stemend (Grob*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)
- me->warning (_ ("Weird stem size; check for narrow beams"));
-
- me->set_property ("stem-end-position", scm_make_real (se));
-}
+ Direction d = get_grob_direction (me);
+ if (d && d * head_positions (me)[get_grob_direction (me)] >= se * d)
+ me->warning (_ ("weird stem size, check for narrow beams"));
-/*
- Note head that determines hshift for upstems
+ me->set_property ("stem-end-position", scm_from_double (se));
+}
- WARNING: triggers direction
-*/
-Grob*
-Stem::support_head (Grob*me)
+/* Note head that determines hshift for upstems
+ WARNING: triggers direction */
+Grob *
+Stem::support_head (Grob *me)
{
- if (head_count (me) == 1)
- {
- /*
- UGH.
- */
-
- return unsmob_grob (ly_car (me->get_property ("note-heads")));
- }
- else
- return first_head (me);
-}
+ extract_grob_set (me, "note-heads", heads);
+ if (heads.size () == 1)
+ return heads[0];
+ return first_head (me);
+}
int
-Stem::head_count (Grob*me)
+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.
-
- WARNING: triggers direction
-*/
-Grob*
-Stem::first_head (Grob*me)
+/* The note head which forms one end of the stem.
+ WARNING: triggers direction */
+Grob *
+Stem::first_head (Grob *me)
{
- Direction d = get_direction (me);
- if (!d)
- return 0;
- return extremal_heads (me)[-d];
+ Direction d = get_grob_direction (me);
+ if (d)
+ return extremal_heads (me)[-d];
+ return 0;
}
-/*
- The note head opposite to the first head.
- */
-Grob*
-Stem::last_head (Grob*me)
+/* 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];
+ Direction d = get_grob_direction (me);
+ if (d)
+ return extremal_heads (me)[d];
+ return 0;
}
/*
- START is part where stem reaches `last' head.
- */
-Drul_array<Grob*>
-Stem::extremal_heads (Grob*me)
+ START is part where stem reaches `last' head.
+
+ This function returns a drul with (bottom-head, top-head).
+*/
+Drul_array<Grob *>
+Stem::extremal_heads (Grob *me)
{
const int inf = 1000000;
Drul_array<int> extpos;
extpos[DOWN] = inf;
- extpos[UP] = -inf;
-
- Drul_array<Grob *> exthead;
- exthead[LEFT] = exthead[RIGHT] =0;
-
- for (SCM s = me->get_property ("note-heads"); ly_c_pair_p (s); s = ly_cdr (s))
- {
- Grob * n = unsmob_grob (ly_car (s));
+ extpos[UP] = -inf;
-
+ Drul_array<Grob *> exthead (0, 0);
+ extract_grob_set (me, "note-heads", heads);
+
+ for (vsize i = heads.size (); i--;)
+ {
+ Grob *n = heads[i];
int p = Staff_symbol_referencer::get_rounded_position (n);
Direction d = LEFT;
- do {
- if (d* p > d* extpos[d])
+ do
{
- exthead[d] = n;
- extpos[d] = p;
+ if (d * p > d * extpos[d])
+ {
+ 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;
+ return a - b;
}
-/*
- The positions, in ascending order.
- */
-Array<int>
+/* The positions, in ascending order. */
+vector<int>
Stem::note_head_positions (Grob *me)
{
- Array<int> ps ;
- for (SCM s = me->get_property ("note-heads"); ly_c_pair_p (s); s = ly_cdr (s))
+ vector<int> ps;
+ extract_grob_set (me, "note-heads", heads);
+
+ for (vsize 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.push_back (p);
}
-
- ps.sort (icmp);
- return ps;
-}
+ vector_sort (ps, integer_compare);
+ return ps;
+}
void
-Stem::add_head (Grob*me, Grob *n)
+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);
- }
+ 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)
+Stem::is_invisible (Grob *me)
{
- return ! (head_count (me)
- && ly_scm2int (me->get_property ("duration-log")) >= 1);
-}
-
-Direction
-Stem::get_default_dir (Grob*me)
-{
- int staff_center = 0;
- Interval hp = head_positions (me);
- if (hp.is_empty ())
- {
- 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));
+ Real stemlet_length = robust_scm2double (me->get_property ("stemlet-length"),
+ 0.0);
- return to_dir (me->get_property ("neutral-direction"));
+ return !((head_count (me)
+ || stemlet_length > 0.0)
+ && scm_to_int (me->get_property ("duration-log")) >= 1);
}
-Real
-Stem::get_default_stem_end_position (Grob*me)
+MAKE_SCHEME_CALLBACK (Stem, calc_stem_end_position, 1)
+SCM
+Stem::calc_stem_end_position (SCM smob)
{
- Real ss = Staff_symbol_referencer::staff_space (me);
-
- int durlog = duration_log (me);
-
- SCM s;
- Array<Real> a;
-
-
- Real length = 7; // WARNING: IN HALF SPACES
- 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));
- }
- }
+ Grob *me = unsmob_grob (smob);
- /* URGURGURG
- 'set-default-stemlen' sets direction too
- */
- Direction dir = get_direction (me);
- if (!dir)
- {
- dir = get_default_dir (me);
- set_grob_direction (me, dir);
- }
+ if (!head_count (me))
+ return scm_from_double (0.0);
- /* stems in unnatural (forced) direction should be shortened,
- according to [Roush & Gourlay] */
- if (dir * head_positions (me)[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);
-
-
- /* On boundary: shorten only half */
- if (abs (head_positions (me)[dir]) <= 1)
- shorten *= 0.5;
- length -= shorten;
- }
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ int durlog = duration_log (me);
+ vector<Real> a;
- /*
- Tremolo stuff:
- */
- Grob * trem = unsmob_grob (me->get_property ("tremolo-flag"));
- if (trem && !unsmob_grob (me->get_property ("beam")))
- {
- /*
- Crude hack: add extra space if tremolo flag is there.
+ /* WARNING: IN HALF SPACES */
+ Real length = robust_scm2double (me->get_property ("length"), 7);
- 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 (trem).extent (Y_AXIS).length () / ss;
-
- if (durlog >= 3)
- {
- Interval flag_ext = flag (me).extent (Y_AXIS) ;
- if (!flag_ext.is_empty ())
- minlen += 2 * flag_ext.length () / ss ;
-
- /*
- The clash is smaller for down stems (since the tremolo is
- angled up.)
- */
- if (dir == DOWN)
- minlen -= 1.0;
- }
-
- length = length >? (minlen + 1.0);
- }
-
- Interval hp = head_positions (me);
- Real st = hp[dir] + dir * length;
+ Direction dir = get_grob_direction (me);
+ Interval hp = head_positions (me);
+ Real stem_end = dir ? hp[dir] + dir * length : 0;
- /*
- TODO: change name to extend-stems to 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 * st < 0) // junkme?
- st = 0.0;
+ if (!no_extend_b && dir * stem_end < 0)
+ stem_end = 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.
-
- */
+
+ /* 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;
+ 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)
+ Interval flag_yext = flag (me).extent (Y_AXIS) * (2 / ss) + stem_end;
+
+ /* Very gory: add myself to the X-support of the parent,
+ which should be a dot-column. */
+
+ if (flag_yext.distance (dp) < 0.5)
{
Grob *par = dots->get_parent (X_AXIS);
{
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.
- */
+ /* TODO: apply some better logic here. The flag is
+ curved inwards, so this will typically be too
+ much. */
}
}
}
}
-
- return st;
+ return scm_from_double (stem_end);
}
+MAKE_SCHEME_CALLBACK (Stem, calc_length, 1)
+SCM
+Stem::calc_length (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+
+ SCM details = me->get_property ("details");
+ int durlog = duration_log (me);
+
+ Real ss = Staff_symbol_referencer::staff_space (me);
+ Real length = 7;
+ 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));
+
+ 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 = 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)
+ shorten *= 0.5;
+
+ length -= shorten;
+ }
+
+ length *= robust_scm2double (me->get_property ("length-fraction"), 1.0);
+
+ /* Tremolo stuff. */
+ 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 */
+
+ Real minlen = 1.0
+ + 2 * t_flag->extent (t_flag, Y_AXIS).length ()
+ / ss;
+
+ /* We don't want to add the whole extent of the flag because the trem
+ and the flag can overlap partly. beam_translation gives a good
+ approximation */
+ if (durlog >= 3)
+ {
+ Real beam_trans = Stem_tremolo::get_beam_translation (t_flag);
+ /* the obvious choice is (durlog - 2) here, but we need a bit more space. */
+ minlen += 2 * (durlog - 1.5) * beam_trans;
+
+ /* up-stems need even a little more space to avoid collisions. This
+ needs to be in sync with the tremolo positioning code in
+ Stem_tremolo::print */
+ if (dir == UP)
+ minlen += beam_trans;
+ }
+ length = max (length, minlen + 1.0);
+ }
- the log of the duration (Number of hooks on the flag minus two)
- */
+ return scm_from_double (length);
+}
+/* The log of the duration (Number of hooks on the flag minus two) */
int
-Stem::duration_log (Grob*me)
+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<Grob> heads =
- Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-heads");
+ return SCM_BOOL_T;
- heads.sort (compare_position);
- Direction dir =get_direction (me);
-
- if (dir < 0)
- heads.reverse ();
+ extract_grob_set (me, "note-heads", ro_heads);
+ vector<Grob*> heads (ro_heads);
+ vector_sort (heads, compare_position);
+ Direction dir = get_grob_direction (me);
+ if (dir < 0)
+ reverse (heads);
Real thick = thickness (me);
-
+
Grob *hed = support_head (me);
- Real w = Note_head::head_extent (hed,X_AXIS)[dir];
- for (int i=0; i < heads.size (); i++)
+ if (!dir)
{
- heads[i]->translate_axis (w - Note_head::head_extent (heads[i],X_AXIS)[dir],
- X_AXIS);
+ programming_error ("Stem dir must be up or down.");
+ dir = UP;
+ set_grob_direction (me, dir);
}
- bool parity= true;
+ Real w = hed->extent (hed, X_AXIS)[dir];
+ for (vsize i = 0; i < heads.size (); i++)
+ 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 (vsize 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 l = 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 l-thickness, but this
- looks too crowded, so we only shift l-0.5*thickness.
+ Reversed head should be shifted ell-thickness, but this
+ looks too crowded, so we only shift ell-0.5*thickness.
This leads to assymetry: Normal heads overlap the
stem 100% whereas reversed heads only overlaps the
stem 50%
-
*/
- Real reverse_overlap =0.5;
- heads[i]->translate_axis ((l-thick*reverse_overlap) * d, X_AXIS);
+ Real reverse_overlap = 0.5;
+ heads[i]->translate_axis ((ell - thick * reverse_overlap) * d,
+ X_AXIS);
if (is_invisible (me))
- heads[i]->translate_axis (-thick*(2 - reverse_overlap) * d , X_AXIS);
+ 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
+ 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;
}
else
parity = true;
-
+
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))
+ Grob *me = unsmob_grob (smob);
+ 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);
+ Grob *me = unsmob_grob (smob);
- SCM mol = me->get_uncached_stencil ();
- Interval iv;
- if (mol != SCM_EOL)
- iv = unsmob_stencil (mol)->extent (a);
- if (Grob *b =get_beam (me))
+ Direction dir = CENTER;
+ int staff_center = 0;
+ Interval hp = head_positions (me);
+ if (!hp.is_empty ())
{
- Direction d = get_direction (me);
- iv[d] += d * Beam::get_thickness (b) /2.0 ;
+ int udistance = (int) (UP * hp[UP] - staff_center);
+ int ddistance = (int) (DOWN * hp[DOWN] - staff_center);
+
+ dir = Direction (sign (ddistance - udistance));
}
-
- return ly_interval2scm (iv);
+
+ return scm_from_int (dir);
}
-Stencil
-Stem::flag (Grob*me)
+MAKE_SCHEME_CALLBACK (Stem, height, 1);
+SCM
+Stem::height (SCM smob)
{
- /* 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;
+ Grob *me = unsmob_grob (smob);
+
+ Direction dir = get_grob_direction (me);
- SCM flag_style_scm = me->get_property ("flag-style");
- if (ly_c_symbol_p (flag_style_scm))
+ /* Trigger callback.
+
+ UGH. Should be automatic
+ */
+ Grob *beam = get_beam (me);
+ if (beam)
{
- flag_style = ly_symbol2string (flag_style_scm);
+ /* trigger set-stem-lengths. */
+ beam->get_property ("quantized-positions");
}
- if (flag_style == "no-flag")
+ /*
+ 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)
{
- return Stencil ();
+ 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)
+{
+ 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 (scm_is_symbol (flag_style_scm))
+ flag_style = ly_symbol2string (flag_style_scm);
+
+ if (flag_style == "no-flag")
+ return Stencil ();
+
bool adjust = true;
- String staffline_offs;
- if (String::compare (flag_style, "mensural") == 0)
+ string staffline_offs;
+ if (flag_style == "mensural")
/* 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,
*/
{
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_line (me, p) ? "0" : "1";
}
else
- {
- staffline_offs = "2";
- }
+ staffline_offs = "2";
}
else
- {
- staffline_offs = "";
- }
+ staffline_offs = "";
- char dir = (get_direction (me) == UP) ? 'u' : 'd';
- String font_char =
- flag_style + to_string (dir) + staffline_offs + to_string (duration_log (me));
+ char dir = (get_grob_direction (me) == UP) ? 'u' : 'd';
+ string font_char = flag_style
+ + 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));
- }
+ 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 stroke_style = ly_scm2string (stroke_style_scm);
+ if (!stroke_style.empty ())
{
- String font_char = to_string (dir) + stroke_style;
- Stencil stroke = fm->find_by_name ("flags-" + font_char);
+ string font_char = to_string (dir) + stroke_style;
+ Stencil stroke = fm->find_by_name ("flags." + font_char);
if (stroke.is_empty ())
- {
- me->warning (_f ("flag stroke `%s' not found", font_char));
- }
+ me->warning (_f ("flag stroke `%s' not found", font_char));
else
- {
- flag.add_stencil (stroke);
- }
+ flag.add_stencil (stroke);
}
}
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)
+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);
}
-MAKE_SCHEME_CALLBACK (Stem,print,1);
-
+MAKE_SCHEME_CALLBACK (Stem, print, 1);
SCM
-Stem::print (SCM smob)
+Stem::print (SCM smob)
{
- Grob*me = unsmob_grob (smob);
+ Grob *me = unsmob_grob (smob);
Stencil mol;
- Direction d = get_direction (me);
-
- /*
- TODO: make the stem start a direction ?
+ Direction d = get_grob_direction (me);
- 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);
+ Real stemlet_length = robust_scm2double (me->get_property ("stemlet-length"),
+ 0.0);
+ bool stemlet = stemlet_length > 0.0;
- if (!lh)
+ /* 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)
+ : first_head (me);
+ Grob *beam = get_beam (me);
+
+ if (!lh && !stemlet)
+ return SCM_EOL;
+
+ 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);
-
- Interval stem_y (y1 <? y2,y2 >? y1);
-
- // dy?
- Real dy = Staff_symbol_referencer::staff_space (me) * 0.5;
+ 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;
- if (Grob *hed = support_head (me))
+ 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;
+ }
+
+ Interval stem_y (min (y1, y2), max (y2, y1));
+
+ 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"));
-
- Box b = Box (Interval (-stem_width/2, stem_width/2),
- Interval (stem_y[DOWN]*dy, stem_y[UP]*dy));
+ Real blot
+ = me->layout ()->get_dimension (ly_symbol2scm ("blot-diameter"));
+
+ 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 ("blot-diameter"));
+ 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);
-
- Real r=0;
+ Grob *me = unsmob_grob (smob);
+ Real r = 0.0;
- if (head_count (me) == 0)
- {
- return scm_make_real (0.0);
- }
-
- if (Grob * f = first_head (me))
+ if (Grob *f = first_head (me))
{
- Interval head_wid = Note_head::head_extent (f, X_AXIS);
-
- Real attach =0.0;
+ Interval head_wid = f->extent (f, X_AXIS);
+ Real attach = 0.0;
if (is_invisible (me))
- {
- attach = 0.0;
- }
+ attach = 0.0;
else
attach = Note_head::stem_attachment_coordinate (f, X_AXIS);
- Direction d = get_direction (me);
-
+ 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 not centered: correct for stem thickness. */
if (attach)
{
- Real rule_thick
- = thickness (me);
-
- r += - d * rule_thick * 0.5;
+ Real rule_thick = thickness (me);
+ r += -d * rule_thick * 0.5;
+ }
+ }
+ else
+ {
+ extract_grob_set (me, "rests", rests);
+ if (rests.size ())
+ {
+ Grob *rest = rests.back ();
+ r = rest->extent (rest, X_AXIS).center ();
}
}
- return scm_make_real (r);
+ return scm_from_double (r);
}
-
-Grob*
-Stem::get_beam (Grob*me)
+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<Spanner *> (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));
+ si.dir_ = get_grob_direction (me);
+
+ 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;
+
+ Real height_of_my_trem = 0.0;
+ Grob *trem = unsmob_grob (me->get_object ("tremolo-flag"));
+ if (trem)
+ height_of_my_trem = trem->extent (trem, Y_AXIS).length ()
+ /* hack a bit of space around the trem. */
+ + beam_translation;
/* UGH
It seems that also for ideal minimum length, we must use
the maximum beam count (for this direction):
-
+
\score{ \notes\relative c''{ [a8 a32] }}
-
+
must be horizontal. */
Real height_of_my_beams = beam_thickness
+ (beam_count - 1) * beam_translation;
Real ideal_minimum_length = ideal_minimum_free
+ height_of_my_beams
+ + height_of_my_trem
/* 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?
-
- 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?
-
- Obviously not for grace beams.
-
- Also, not for knees. Seems to be a good thing. */
+
+ 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.
+
+ Reference?
+
+ Obviously not for grace beams.
+
+ 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
+ Real minimum_length = max (minimum_free, height_of_my_trem)
+ height_of_my_beams
/* stem only extends to center of beam */
- 0.5 * beam_thickness;
- Real minimum_y = note_start + minimum_length;
-
-
ideal_y *= my_dir;
- Real shortest_y = minimum_y * my_dir;
-
- me->set_property ("stem-info",
- scm_list_n (scm_make_real (ideal_y),
- scm_make_real (shortest_y),
- SCM_UNDEFINED));
+ Real minimum_y = note_start + minimum_length;
+ Real shortest_y = minimum_y * my_dir;
+
+ 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 l = int_list_to_slice (ly_car (beaming));
- Slice r = int_list_to_slice (ly_cdr (beaming));
- l.unite (r);
-
- return l;
-}
-
-
-/*
- these are too many props.
- */
-ADD_INTERFACE (Stem,"stem-interface",
- "The stem represent the graphical stem. "
- " In addition, it internally connects note heads, beams, 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");
-
-
+ 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."
+
+ "\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 "
+ "max-beam-connect "
+ "neutral-direction "
+ "no-stem-extend "
+ "note-heads "
+ "positioning-done "
+ "rests "
+ "stem-end-position "
+ "stem-info "
+ "stemlet-length "
+ "stroke-style "
+ "thickness "
+ "tremolo-flag "
+ );
/****************************************************************/
Stem_info::Stem_info ()
{
- ideal_y_ = shortest_y_ =0;
+ ideal_y_ = shortest_y_ = 0;
dir_ = CENTER;
}
projects / lilypond.git / blobdiff