source file of the GNU LilyPond music typesetter
- (c) 1996--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1996--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
TODO: This is way too hairy
{
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 (!scm_is_number (p))
- {
- pos = get_default_stem_end_position (me);
- me->set_property ("stem-end-position", scm_from_double (pos));
- }
- else
- pos = scm_to_double (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)
+ 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_from_double (se));
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;
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;
&& 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<Real> 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;
+
+ /* 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);
- return to_dir (me->get_property ("neutral-direction"));
+ /* 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<Real> a;
- /* WARNING: IN HALF SPACES */
+ Real ss = Staff_symbol_referencer::staff_space (me);
Real length = 7;
- SCM scm_len = me->get_property ("length");
- if (scm_is_number (scm_len))
- length = scm_to_double (scm_len);
- else
- {
- s = me->get_property ("lengths");
- if (scm_is_pair (s))
- length = 2 * scm_to_double (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);
+ 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 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);
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")))
}
length = max (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. */
- }
- }
- }
- }
- 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)
extract_grob_set (me, "note-heads", ro_heads);
Link_array<Grob> heads (ro_heads);
heads.sort (compare_position);
- Direction dir = get_direction (me);
+ Direction dir = get_grob_direction (me);
if (dir < 0)
heads.reverse ();
Real thick = thickness (me);
Grob *hed = support_head (me);
+ 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 - heads[i]->extent (heads[i], X_AXIS)[dir],
{
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.
return SCM_BOOL_T;
}
-
-
MAKE_SCHEME_CALLBACK(Stem, calc_direction, 1);
SCM
Stem::calc_direction (SCM smob)
dir = get_grob_direction (me);
}
else
- dir = get_default_dir (me);
-
+ {
+ SCM dd = me->get_property ("default-direction");
+ dir = to_dir (dd);
+ if (!dir)
+ return me->get_property ("neutral-direction");
+ }
+
return scm_from_int (dir);
}
-MAKE_SCHEME_CALLBACK (Stem, calc_stem_end_position, 1);
+MAKE_SCHEME_CALLBACK(Stem, calc_default_direction, 1);
SCM
-Stem::calc_stem_end_position (SCM smob)
+Stem::calc_default_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.)
- */
- Real pos = 0.0;
- if (head_count (me))
+ Direction dir = CENTER;
+ int staff_center = 0;
+ Interval hp = head_positions (me);
+ if (!hp.is_empty ())
{
- pos = stem_end_position (me); // ugh. Trigger direction calc.
+ int udistance = (int) (UP * hp[UP] - staff_center);
+ int ddistance = (int) (DOWN * hp[DOWN] - staff_center);
+
+ dir = Direction (sign (ddistance - udistance));
}
-
- return scm_from_double (pos);
+
+ return scm_from_int (dir);
}
-MAKE_SCHEME_CALLBACK (Stem, height, 2);
+
+MAKE_SCHEME_CALLBACK (Stem, height, 1);
SCM
-Stem::height (SCM smob, SCM ax)
+Stem::height (SCM smob)
{
- Axis a = (Axis)scm_to_int (ax);
Grob *me = unsmob_grob (smob);
- assert (a == Y_AXIS);
Direction dir = get_grob_direction (me);
beam->get_property ("positions");
}
- /* FIXME uncached? */
- Interval iv = me->get_stencil () ? me->get_stencil ()->extent (a) : Interval();
+ /*
+ 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)
{
if (dir == CENTER)
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)
{
else
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 (log);
Font_metric *fm = Font_interface::get_default_font (me);
return flag;
}
-MAKE_SCHEME_CALLBACK (Stem, width_callback, 2);
+MAKE_SCHEME_CALLBACK (Stem, width, 1);
SCM
-Stem::width_callback (SCM e, SCM ax)
+Stem::width (SCM e)
{
- (void) ax;
- assert (scm_to_int (ax) == X_AXIS);
Grob *me = unsmob_grob (e);
Interval r;
{
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);
if (is_invisible (me))
return SCM_EOL;
- 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 (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 = hed->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 / half_space;
// URG
Real stem_width = thickness (me);
Real blot
- = me->get_layout ()->get_dimension (ly_symbol2scm ("blotdiameter"));
+ = me->layout ()->get_dimension (ly_symbol2scm ("blotdiameter"));
Box b = Box (Interval (-stem_width / 2, stem_width / 2),
Interval (stem_y[DOWN] * half_space, stem_y[UP] * half_space));
Stencil fl = flag (me);
if (!fl.is_empty ())
{
- Direction d = get_direction (me);
+ Direction d = get_grob_direction (me);
Real blot
- = me->get_layout ()->get_dimension (ly_symbol2scm ("blotdiameter"));
+ = 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 = stem_end_position (me);
+ 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);
}
/*
move the stem to right of the notehead if it is up.
*/
-MAKE_SCHEME_CALLBACK (Stem, offset_callback, 2);
+MAKE_SCHEME_CALLBACK (Stem, offset_callback, 1);
SCM
-Stem::offset_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 (Grob *f = first_head (me))
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;
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");
+ 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
+ * 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");
+ 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;
+ * staff_space
+ * length_fraction;
/* UGH
It seems that also for ideal minimum length, we must use
ideal_y -= robust_scm2double (beam->get_property ("shorten"), 0);
+ 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,
- me->get_property
- ("beamed-extreme-minimum-free-lengths")))
- * staff_space;
+ = scm_to_double (robust_list_ref (beam_count - 1, bemfl))
+ * staff_space
+ * length_fraction;
Real minimum_length = minimum_free
+ height_of_my_beams
"The stem represent the graphical stem. "
"In addition, it internally connects note heads, beams and"
"tremolos. "
- "Rests and whole notes have invisible stems.",
+ "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 "
- "beamed-extreme-minimum-free-lengths "
- "beamed-lengths "
- "beamed-minimum-free-lengths "
"beaming "
+ "default-direction "
+ "details "
"direction "
"duration-log "
"flag-style "
"french-beaming "
"length "
- "lengths "
+ "length-fraction "
"neutral-direction "
"no-stem-extend "
"note-heads "
"rests "
"stem-end-position "
"stem-info "
- "stem-shorten "
"stemlet-length "
"stroke-style "
"thickness "