source file of the GNU LilyPond music typesetter
- (c) 1996--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 1996--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
TODO: This is way too hairy
Drul_array<Grob *>
Stem::extremal_heads (Grob *me)
{
- const int inf = 1000000;
+ const int inf = INT_MAX;
Drul_array<int> extpos;
extpos[DOWN] = inf;
extpos[UP] = -inf;
bool
Stem::is_invisible (Grob *me)
{
- Real stemlet_length = robust_scm2double (me->get_property ("stemlet-length"),
- 0.0);
+ return !is_normal_stem (me)
+ && (robust_scm2double (me->get_property ("stemlet-length"),
+ 0.0) == 0.0);
+}
- return !((head_count (me)
- || stemlet_length > 0.0)
- && scm_to_int (me->get_property ("duration-log")) >= 1);
+
+bool
+Stem::is_normal_stem (Grob *me)
+{
+ return head_count (me) && scm_to_int (me->get_property ("duration-log")) >= 1;
}
+
MAKE_SCHEME_CALLBACK (Stem, pure_height, 3)
SCM
Stem::pure_height (SCM smob, SCM start, SCM end)
{
(void) start;
(void) end;
-
-
+
Grob *me = unsmob_grob (smob);
+ Interval iv;
+
+ if (!is_normal_stem (me))
+ return ly_interval2scm (iv);
+
+ /* if we are part of a cross-staff beam, return empty */
+ if (get_beam (me) && Beam::is_cross_staff (get_beam (me)))
+ return ly_interval2scm (iv);
+
Real ss = Staff_symbol_referencer::staff_space (me);
Real len = scm_to_double (calc_length (smob)) * ss / 2;
Direction dir = get_grob_direction (me);
- Interval iv;
Interval hp = head_positions (me);
if (dir == UP)
iv = Interval (0, len);
return scm_from_double (stem_end);
}
-
+/* Length is in half-spaces (or: positions) here. */
MAKE_SCHEME_CALLBACK (Stem, calc_length, 1)
SCM
Stem::calc_length (SCM smob)
(Stem_tremolo::raw_stencil () looks at the beam.) --hwn */
Real minlen = 1.0
- + 2 * t_flag->extent (t_flag, Y_AXIS).length ()
- / ss;
+ + 2 * Stem_tremolo::vertical_length (t_flag) / 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
if (!head_count (me))
return SCM_BOOL_T;
+ me->set_property ("positioning-done", SCM_BOOL_T);
+
extract_grob_set (me, "note-heads", ro_heads);
vector<Grob*> heads (ro_heads);
vector_sort (heads, position_less);
Stem::height (SCM smob)
{
Grob *me = unsmob_grob (smob);
-
+ if (!is_normal_stem (me))
+ return ly_interval2scm (Interval ());
+
Direction dir = get_grob_direction (me);
- /* Trigger callback.
-
- UGH. Should be automatic
- */
Grob *beam = get_beam (me);
if (beam)
{
Stem::offset_callback (SCM smob)
{
Grob *me = unsmob_grob (smob);
- Real r = 0.0;
+ extract_grob_set (me, "rests", rests);
+ if (rests.size ())
+ {
+ Grob *rest = rests.back ();
+ Real r = rest->extent (rest, X_AXIS).center ();
+ return scm_from_double (r);
+ }
+
+
if (Grob *f = first_head (me))
{
Interval head_wid = f->extent (f, X_AXIS);
Direction d = get_grob_direction (me);
Real real_attach = head_wid.linear_combination (d * attach);
- r = real_attach;
+ Real 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_from_double (r);
}
- else
- {
- extract_grob_set (me, "rests", rests);
- if (rests.size ())
- {
- Grob *rest = rests.back ();
- r = rest->extent (rest, X_AXIS).center ();
- }
- }
- return scm_from_double (r);
+
+ programming_error ("Weird stem.");
+ return scm_from_double (0.0);
}
Spanner *
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 ()
+ {
+ height_of_my_trem
+ = Stem_tremolo::vertical_length (trem)
/* 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):
return le;
}
+bool
+Stem::is_cross_staff (Grob *stem)
+{
+ Grob *beam = unsmob_grob (stem->get_object ("beam"));
+ return beam && Beam::is_cross_staff (beam);
+}
+
+MAKE_SCHEME_CALLBACK (Stem, cross_staff, 1)
+SCM
+Stem::cross_staff (SCM smob)
+{
+ return scm_from_bool (is_cross_staff (unsmob_grob (smob)));
+}
+
/* FIXME: Too many properties */
ADD_INTERFACE (Stem,
"The stem represent the graphical stem. "