/*
- accidental-placement.cc -- implement Accidental_placement
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 2002--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 2002--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "stream-event.hh"
#include "warn.hh"
-
-void
-Accidental_placement::add_accidental (Grob *me, Grob *a)
+static Pitch*
+accidental_pitch (Grob *acc)
{
- a->set_parent (me, X_AXIS);
- a->set_property ("X-offset", Grob::x_parent_positioning_proc);
- SCM cause = a->get_parent (Y_AXIS)->get_property ("cause");
+ SCM cause = acc->get_parent (Y_AXIS)->get_property ("cause");
Stream_event *mcause = unsmob_stream_event (cause);
if (!mcause)
{
programming_error ("note head has no event cause");
- return;
+ return 0;
}
- Pitch *p = unsmob_pitch (mcause->get_property ("pitch"));
+ return unsmob_pitch (mcause->get_property ("pitch"));
+}
+
+void
+Accidental_placement::add_accidental (Grob *me, Grob *a)
+{
+ Pitch *p = accidental_pitch (a);
+ if (!p)
+ return;
+ a->set_parent (me, X_AXIS);
+ a->set_property ("X-offset", Grob::x_parent_positioning_proc);
int n = p->get_notename ();
SCM accs = me->get_object ("accidental-grobs");
return a->vertical_extent_[UP];
}
-int ape_compare (Accidental_placement_entry *const &a,
- Accidental_placement_entry *const &b)
-{
- return sign (ape_priority (a) - ape_priority (b));
-}
-
bool ape_less (Accidental_placement_entry *const &a,
Accidental_placement_entry *const &b)
{
return ape_priority (a) < ape_priority (b);
}
-int ape_rcompare (Accidental_placement_entry *const &a,
- Accidental_placement_entry *const &b)
+/*
+ This function provides a method for sorting accidentals that belong to the
+ same note. The accidentals that this function considers to be "smallest"
+ will be placed to the left of the "larger" accidentals.
+
+ Naturals are the largest (so that they don't get confused with cancellation
+ naturals); apart from that, we order according to the alteration (so
+ double-flats are the smallest).
+
+ Precondition: the accidentals are attached to NoteHeads of the same note
+ name -- the octaves, however, may be different.
+*/
+static bool
+acc_less (Grob *const &a, Grob *const &b)
{
- return -sign (ape_priority (a) - ape_priority (b));
+ Pitch *p = accidental_pitch (a);
+ Pitch *q = accidental_pitch (b);
+
+ if (!p || !q)
+ {
+ programming_error ("these accidentals do not have a pitch");
+ return false;
+ }
+
+ if (p->get_octave () != q->get_octave ())
+ return p->get_octave () < q->get_octave ();
+
+ if (p->get_alteration () == Rational (0))
+ return false;
+ if (q->get_alteration () == Rational (0))
+ return true;
+
+ return p->get_alteration () < q->get_alteration ();
}
/*
set_ape_skylines (Accidental_placement_entry *ape,
Grob **common)
{
- for (vsize i = ape->grobs_.size (); i--;)
+ vector<Grob*> accs (ape->grobs_);
+ vector_sort (accs, &acc_less);
+
+ /* We know that each accidental has the same note name and we assume that
+ accidentals in different octaves won't collide. If two or more
+ accidentals are in the same octave:
+ 1) if they are the same accidental, print them in overstrike
+ 2) otherwise, shift one to the left so they don't overlap. */
+ int last_octave = 0;
+ Real offset = 0;
+ Real last_offset = 0;
+ Rational last_alteration (0);
+ for (vsize i = accs.size (); i--;)
{
- Grob *a = ape->grobs_[i];
+ Grob *a = accs[i];
+ Pitch *p = accidental_pitch (a);
+
+ if (!p)
+ continue;
+
+ if (i == accs.size () - 1 || p->get_octave () != last_octave)
+ {
+ last_offset = 0;
+ offset = a->extent (a, X_AXIS)[LEFT] - 0.2;
+ }
+ else if (p->get_alteration () == last_alteration)
+ a->translate_axis (last_offset, X_AXIS);
+ else /* Our alteration is different from the last one */
+ {
+ Real this_offset = offset - a->extent (a, X_AXIS)[RIGHT];
+ a->translate_axis (this_offset, X_AXIS);
+
+ /* FIXME: read the padding from the AccidentalPlacement grob */
+ last_offset = this_offset;
+ offset -= a->extent (a, X_AXIS).length () + 0.2;
+ }
+
vector<Box> boxes = Accidental_interface::accurate_boxes (a, common);
ape->extents_.insert (ape->extents_.end (), boxes.begin (), boxes.end ());
for (vsize j = boxes.size (); j--;)
ape->vertical_extent_.unite (boxes[j][Y_AXIS]);
+
+ last_octave = p->get_octave ();
+ last_alteration = p->get_alteration ();
}
ape->left_skyline_ = Skyline (ape->extents_, 0, Y_AXIS, LEFT);
ape->right_skyline_ = Skyline (ape->extents_, 0, Y_AXIS, RIGHT);
projects / lilypond.git / blobdiff