source file of the GNU LilyPond music typesetter
- (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1998--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
+#include <math.h> // ceil.
#include "side-position-interface.hh"
-#include "staff-symbol.hh"
#include "debug.hh"
#include "warn.hh"
#include "dimensions.hh"
-#include "dimension-cache.hh"
-#include "staff-symbol-referencer.hh"
-
-Side_position_interface::Side_position_interface (Score_element const *e)
-{
- elt_l_ = (Score_element*)e;
-}
+#include "staff-symbol-referencer.hh"
+#include "group-interface.hh"
void
-Side_position_interface::add_support (Score_element*e)
+Side_position::add_support (Score_element*me, Score_element*e)
{
- SCM sup = elt_l_->get_elt_property ("side-support");
- elt_l_->set_elt_property ("side-support",
- gh_cons (e->self_scm_,sup));
+ Pointer_group_interface (me, "side-support-elements").add_element (e);
}
Direction
-Side_position_interface::get_direction () const
+Side_position::get_direction (Score_element*me)
{
- SCM d = elt_l_->get_elt_property ("direction");
+ SCM d = me->get_elt_property ("direction");
if (isdir_b (d))
return to_dir (d) ? to_dir (d) : DOWN;
Direction relative_dir = UP;
- SCM reldir = elt_l_->get_elt_property ("side-relative-direction"); // should use a lambda.
+ SCM reldir = me->get_elt_property ("side-relative-direction"); // should use a lambda.
if (isdir_b (reldir))
{
relative_dir = to_dir (reldir);
}
- SCM other_elt = elt_l_->get_elt_property ("direction-source");
+ SCM other_elt = me->get_elt_property ("direction-source");
Score_element * e = unsmob_element(other_elt);
if (e)
{
- return (Direction)(relative_dir * Side_position_interface (e).get_direction ());
+ return (Direction)(relative_dir * Side_position::get_direction (e));
}
return DOWN;
}
-/**
- Callback that does the aligning.
+/*
+ Callback that does the aligning. Puts the element next to the support
*/
+
Real
-Side_position_interface::side_position (Dimension_cache const * c)
+Side_position::side_position (Score_element *cme, Axis axis)
{
- Score_element * me = dynamic_cast<Score_element*> (c->element_l ());
-
- Interval dim;
- Axis axis = c->axis ();
+ Score_element* me = (Score_element*)cme;
Score_element *common = me->parent_l (axis);
- SCM support = me->get_elt_property ("side-support");
+ SCM support = me->get_elt_property ("side-support-elements");
for (SCM s = support; s != SCM_EOL; s = gh_cdr (s))
{
- Score_element * e = unsmob_element ( gh_car (s));
+ Score_element * e = unsmob_element (gh_car (s));
if (e)
common = common->common_refpoint (e, axis);
}
+ Interval dim;
for (SCM s = support; s != SCM_EOL; s = gh_cdr (s))
{
dim = Interval(0,0);
}
+ Direction dir = Side_position::get_direction (me);
+
Real off = me->parent_l (axis)->relative_coordinate (common, axis);
+ SCM minimum = me->remove_elt_property ("minimum-space");
-
- Direction dir = Side_position_interface (me).get_direction ();
-
- SCM pad = me->remove_elt_property ("padding");
- if (pad != SCM_UNDEFINED)
+ Real total_off = dim[dir] + off;
+ SCM padding = me->remove_elt_property ("padding");
+ if (gh_number_p (padding))
{
- off += gh_scm2double (pad) * dir;
+ total_off += gh_scm2double (padding) * dir;
+ }
+ if (gh_number_p (minimum) && total_off * dir < gh_scm2double (minimum))
+ {
+ total_off = gh_scm2double (minimum) * dir;
}
- Real total_off = dim[dir] + off;
-
if (fabs (total_off) > 100 CM)
programming_error ("Huh ? Improbable staff side dim.");
return total_off;
}
+/**
+ callback that centers the element on itself
+ */
Real
-Side_position_interface::self_alignment (Dimension_cache const *c)
+Side_position::aligned_on_self (Score_element *me, Axis ax)
{
String s ("self-alignment-");
- Axis ax = c->axis ();
+
s += (ax == X_AXIS) ? "X" : "Y";
- Score_element *elm = dynamic_cast<Score_element*> (c->element_l ());
- SCM align (elm->get_elt_property (s));
- if (isdir_b (align))
+
+ SCM align (me->get_elt_property (s.ch_C()));
+ if (gh_number_p (align))
{
- Direction d = to_dir (align);
- Interval ext(elm->extent (ax));
- if (d)
+ Interval ext(me->extent (ax));
+
+ if (ext.empty_b ())
+ {
+ programming_error ("I'm empty. Can't align on self");
+ return 0.0;
+ }
+ else
{
- return - ext[d];
+ Real lambda = (0.5 - gh_scm2double (align) / 2.0);
+ return - (lambda * ext[LEFT] + (1 - lambda) * ext[RIGHT]);
}
- return - ext.center ();
}
- else
+ else if (unsmob_element (align))
+ {
+ return - unsmob_element (align)->relative_coordinate (me, ax);
+ }
return 0.0;
}
+
Real
directed_round (Real f, Direction d)
{
return ceil (f);
}
+/*
+ Callback that quantises in staff-spaces, rounding in the direction
+ of the elements "direction" elt property.
+
+ Only rounds when we're inside the staff, as determined by
+ Staff_symbol_referencer::staff_radius() */
Real
-Side_position_interface::quantised_position (Dimension_cache const *c)
+Side_position::quantised_position (Score_element *me, Axis )
{
- Score_element * me = dynamic_cast<Score_element*> (c->element_l ());
- Side_position_interface s(me);
- Direction d = s.get_direction ();
- Staff_symbol_referencer_interface si (me);
+ Direction d = Side_position::get_direction (me);
- if (si.has_interface_b ())
+ if (Staff_symbol_referencer::has_interface (me))
{
- Real p = si.position_f ();
+ Real p = Staff_symbol_referencer::position_f (me);
Real rp = directed_round (p, d);
-
+ Real rad = Staff_symbol_referencer::staff_radius (me) *2 ;
int ip = int (rp);
- if ((ip % 2) == 0)
+
+ if (abs (ip) < rad && Staff_symbol_referencer::on_staffline (me,ip))
{
ip += d;
rp += d;
}
- return (rp - p) * si.staff_line_leading_f () / 2.0;
+ return (rp - p) * Staff_symbol_referencer::staff_space (me) / 2.0;
}
return 0.0;
}
+/*
+ Position next to support, taking into account my own dimensions and padding.
+ */
Real
-Side_position_interface::aligned_side (Dimension_cache const *c)
+Side_position::aligned_side (Score_element *me, Axis ax)
{
- Score_element * me = dynamic_cast<Score_element*> (c->element_l ());
- Side_position_interface s(me);
- Direction d = s.get_direction ();
- Axis ax = c->axis ();
- Real o = side_position (c);
+
+ Direction d = Side_position ::get_direction (me);
+ Real o = side_position (me,ax);
Interval iv = me->extent (ax);
return o;
}
+/*
+ Position centered on parent.
+ */
+Real
+Side_position::centered_on_parent (Score_element * me, Axis a)
+{
+ Score_element *him = me->parent_l (a);
+ return him->extent (a).center ();
+}
void
-Side_position_interface::set_axis (Axis a)
+Side_position::add_staff_support (Score_element*me)
{
- // prop transparent ?
- if (elt_l_->get_elt_property ("side-support") == SCM_UNDEFINED)
- elt_l_->set_elt_property ("side-support" ,SCM_EOL);
-
- elt_l_->dim_cache_[a]->off_callbacks_.push (aligned_side);
+ Score_element* st = Staff_symbol_referencer::staff_symbol_l (me);
+ if (st)
+ {
+ add_support (me,st);
+ }
}
-
void
-Side_position_interface::set_quantised (Axis a)
+Side_position::set_axis (Score_element*me, Axis a)
{
- Dimension_cache * c = elt_l_->dim_cache_[a];
-
- c->off_callbacks_.push (quantised_position);
+ if (!me->has_offset_callback_b (aligned_side, a))
+ me->add_offset_callback (aligned_side, a);
}
+
+
+
Axis
-Side_position_interface::get_axis () const
+Side_position::get_axis (Score_element*me)
{
- Dimension_cache * c = elt_l_->dim_cache_[X_AXIS];
- for (int i=0 ; i < c->off_callbacks_.size();i ++)
- if (c->off_callbacks_[i] == side_position
- ||c->off_callbacks_[i] == aligned_side)
- return X_AXIS;
+ if (me->has_offset_callback_b (&side_position, X_AXIS)
+ || me->has_offset_callback_b (&aligned_side , X_AXIS))
+ return X_AXIS;
return Y_AXIS;
}
void
-Side_position_interface::set_direction (Direction d)
+Side_position::set_direction (Score_element*me, Direction d)
+{
+ me->set_elt_property ("direction", gh_int2scm (d));
+}
+
+void
+Side_position::set_minimum_space (Score_element*me, Real m)
{
- elt_l_->set_elt_property ("direction", gh_int2scm (d));
+ me->set_elt_property ("minimum-space", gh_double2scm (m));
+}
+
+void
+Side_position::set_padding (Score_element*me, Real p)
+{
+ me->set_elt_property ("padding", gh_double2scm (p));
}
bool
-Side_position_interface::has_interface_b () const
+Side_position::has_interface (Score_element*me)
{
- return elt_l_->get_elt_property ("side-support") != SCM_UNDEFINED;
+ return me->has_interface (ly_symbol2scm ("side-position-interface"));
}
bool
-Side_position_interface::supported_b () const
+Side_position::supported_b (Score_element*me)
{
- SCM s =elt_l_->get_elt_property ("side-support");
- return s != SCM_UNDEFINED && s != SCM_EOL;
+ SCM s = me->get_elt_property ("side-support-elements");
+ return gh_pair_p(s);
}
+
+
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