/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 2004--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Copyright (C) 2004--2012 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
#include "self-alignment-interface.hh"
+#include "directional-element-interface.hh"
#include "grob.hh"
+#include "grob-array.hh"
+#include "interval-minefield.hh"
+#include "note-column.hh"
#include "paper-column.hh"
+#include "pointer-group-interface.hh"
#include "warn.hh"
MAKE_SCHEME_CALLBACK (Self_alignment_interface, y_aligned_on_self, 1);
Self_alignment_interface::aligned_on_self (Grob *me, Axis a, bool pure, int start, int end)
{
SCM sym = (a == X_AXIS) ? ly_symbol2scm ("self-alignment-X")
- : ly_symbol2scm ("self-alignment-Y");
+ : ly_symbol2scm ("self-alignment-Y");
SCM align (me->internal_get_property (sym));
if (scm_is_number (align))
{
Interval ext (me->maybe_pure_extent (me, a, pure, start, end));
- if (ext.is_empty ())
- programming_error ("cannot align on self: empty element");
- else
- return scm_from_double (- ext.linear_combination (scm_to_double (align)));
+ if (!ext.is_empty ())
+ return scm_from_double (- ext.linear_combination (scm_to_double (align)));
}
return scm_from_double (0.0);
}
-
SCM
Self_alignment_interface::centered_on_object (Grob *him, Axis a)
{
return centered_on_object (unsmob_grob (smob)->get_parent (X_AXIS), X_AXIS);
}
+MAKE_SCHEME_CALLBACK (Self_alignment_interface, centered_on_note_columns, 1);
+SCM
+Self_alignment_interface::centered_on_note_columns (SCM smob)
+{
+ Item *it = unsmob_item (smob)->get_column ();
+ if (!it)
+ return scm_from_double (0.0);
+
+ extract_grob_set (it, "elements", elts);
+ vector<Grob *> ncs;
+ Interval centers;
+ for (vsize i = 0; i < elts.size (); i++)
+ if (Note_column::has_interface (elts[i]))
+ centers.add_point (scm_to_double (centered_on_object (elts[i], X_AXIS)));
+
+ if (centers.is_empty ())
+ return scm_from_double (0.0);
+
+ return scm_from_double (centers.center ());
+}
+
MAKE_SCHEME_CALLBACK (Self_alignment_interface, centered_on_y_parent, 1);
SCM
Self_alignment_interface::centered_on_y_parent (SCM smob)
return centered_on_object (unsmob_grob (smob)->get_parent (Y_AXIS), X_AXIS);
}
-MAKE_SCHEME_CALLBACK (Self_alignment_interface, aligned_on_x_parent,1);
+MAKE_SCHEME_CALLBACK (Self_alignment_interface, aligned_on_x_parent, 1);
SCM
Self_alignment_interface::aligned_on_x_parent (SCM smob)
{
return aligned_on_parent (unsmob_grob (smob), X_AXIS);
}
-MAKE_SCHEME_CALLBACK (Self_alignment_interface, aligned_on_y_parent,1);
+MAKE_SCHEME_CALLBACK (Self_alignment_interface, aligned_on_y_parent, 1);
SCM
Self_alignment_interface::aligned_on_y_parent (SCM smob)
{
Interval he = him->extent (him, a);
SCM sym = (a == X_AXIS) ? ly_symbol2scm ("self-alignment-X")
- : ly_symbol2scm ("self-alignment-Y");
+ : ly_symbol2scm ("self-alignment-Y");
SCM align_prop (me->internal_get_property (sym));
if (!scm_is_number (align_prop))
return scm_from_double (x);
}
+MAKE_SCHEME_CALLBACK (Self_alignment_interface, avoid_x_colliding_grobs, 2);
+SCM
+Self_alignment_interface::avoid_x_colliding_grobs (SCM smob, SCM o)
+{
+ SCM avoided = avoid_colliding_grobs (unsmob_grob (smob), X_AXIS, robust_scm2double (o, 0.0));
+ return scm_is_null (avoided) ? o : avoided;
+}
+
+MAKE_SCHEME_CALLBACK (Self_alignment_interface, x_colliding_grobs, 1);
+SCM
+Self_alignment_interface::x_colliding_grobs (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ extract_grob_set (me, "potential-X-colliding-grobs", pot);
+ vector<Grob *> act;
+ Direction d = get_grob_direction (me->get_parent (Y_AXIS));
+ for (vsize i = 0; i < pot.size (); i++)
+ if (d == get_grob_direction (pot[i])
+ && to_boolean (pot[i]->get_property ("cross-staff")))
+ act.push_back (pot[i]);
+
+ SCM grobs_scm = Grob_array::make_array ();
+ unsmob_grob_array (grobs_scm)->set_array (act);
+
+ return grobs_scm;
+}
+
+SCM
+Self_alignment_interface::avoid_colliding_grobs (Grob *me, Axis a, Real offset)
+{
+ extract_grob_set (me, a == X_AXIS ? "X-colliding-grobs" : "Y-colliding-grobs", colls);
+ if (!colls.size ())
+ return SCM_EOL;
+ vector<Interval> ivs;
+
+ Item *refp = dynamic_cast<Item *> (common_refpoint_of_array (colls, me, a));
+ if (!refp)
+ return SCM_EOL;
+
+ Interval iv = me->extent (me, a) + offset;
+ for (vsize i = 0; i < colls.size (); i++)
+ ivs.push_back (colls[i]->extent (refp, a));
+
+ Interval_minefield minefield (Interval (iv.center (), iv.center ()), iv.length ());
+ for (vsize i = 0; i < ivs.size (); i++)
+ minefield.add_forbidden_interval (ivs[i]);
+ minefield.solve ();
+ Interval pos = minefield.feasible_placements ();
+
+ if (pos[LEFT] == pos[RIGHT])
+ return SCM_EOL;
+
+ Direction col_dir = ((abs (pos[LEFT] - iv.center ())
+ + robust_scm2double (me->get_property ("collision-bias"), 0.0))
+ > abs (pos[RIGHT] - iv.center ()))
+ ? RIGHT
+ : LEFT;
+
+ return scm_from_double ((pos[col_dir] - (iv.length () / 2)
+ + col_dir
+ * robust_scm2double (me->get_property ("collision-padding"), 0.0)));
+}
+
void
Self_alignment_interface::set_center_parent (Grob *me, Axis a)
{
add_offset_callback (me,
- (a == X_AXIS) ? centered_on_x_parent_proc : centered_on_y_parent_proc,
- a);
+ (a == X_AXIS) ? centered_on_x_parent_proc : centered_on_y_parent_proc,
+ a);
+}
+
+void
+Self_alignment_interface::avoid_x_collisions (Grob *me)
+{
+ chain_offset_callback (me, avoid_x_colliding_grobs_proc, X_AXIS);
}
void
Self_alignment_interface::set_align_self (Grob *me, Axis a)
{
add_offset_callback (me,
- (a == X_AXIS) ? x_aligned_on_self_proc : y_aligned_on_self_proc,
- a);
+ (a == X_AXIS) ? x_aligned_on_self_proc : y_aligned_on_self_proc,
+ a);
}
ADD_INTERFACE (Self_alignment_interface,
- "Position this object on itself and/or on its parent. To this"
- " end, the following functions are provided:\n"
- "\n"
- "@table @code\n"
- "@item Self_alignment_interface::[xy]_aligned_on_self\n"
- "Align self on reference point, using"
- " @code{self-alignment-X} and @code{self-alignment-Y}."
- "@item Self_alignment_interface::aligned_on_[xy]_parent\n"
- "@item Self_alignment_interface::centered_on_[xy]_parent\n"
- "Shift the object so its own reference point is centered on"
- " the extent of the parent\n"
- "@end table\n",
-
- /* properties */
- "self-alignment-X "
- "self-alignment-Y "
- );
+ "Position this object on itself and/or on its parent. To this"
+ " end, the following functions are provided:\n"
+ "\n"
+ "@table @code\n"
+ "@item Self_alignment_interface::[xy]_aligned_on_self\n"
+ "Align self on reference point, using"
+ " @code{self-alignment-X} and @code{self-alignment-Y}."
+ "@item Self_alignment_interface::aligned_on_[xy]_parent\n"
+ "@item Self_alignment_interface::centered_on_[xy]_parent\n"
+ "Shift the object so its own reference point is centered on"
+ " the extent of the parent\n"
+ "@end table\n",
+
+ /* properties */
+ "collision-bias "
+ "collision-padding "
+ "potential-X-colliding-grobs "
+ "self-alignment-X "
+ "self-alignment-Y "
+ "X-colliding-grobs "
+ "Y-colliding-grobs "
+ );
projects / lilypond.git / blobdiff