source file of the GNU LilyPond music typesetter
- (c) 1998--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1998--2002 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 "group-interface.hh"
+#include "directional-element-interface.hh"
void
-Side_position_interface::add_support (Score_element*e)
+Side_position_interface::add_support (Grob*me, Grob*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::add_grob (me, ly_symbol2scm ("side-support-elements"), e);
}
Direction
-Side_position_interface::get_direction () const
+Side_position_interface::get_direction (Grob*me)
{
- SCM d = elt_l_->get_elt_property ("direction");
- if (isdir_b (d))
- return to_dir (d) ? to_dir (d) : DOWN;
+ SCM d = me->get_grob_property ("direction");
+ if (isdir_b (d) && to_dir (d))
+ return to_dir (d);
- Direction relative_dir = UP;
- SCM reldir = elt_l_->get_elt_property ("side-relative-direction"); // should use a lambda.
+ Direction relative_dir = Direction (1);
+ SCM reldir = me->get_grob_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");
- Score_element * e = unsmob_element(other_elt);
+ SCM other_elt = me->get_grob_property ("direction-source");
+ Grob * e = unsmob_grob (other_elt);
if (e)
{
- return (Direction)(relative_dir * Side_position_interface (e).get_direction ());
+ return (Direction) (relative_dir * Directional_element_interface::get (e));
}
- return DOWN;
+ return CENTER;
}
-/*
- Callback that does the aligning. Puts the element next to the support
- */
-Real
-Side_position_interface::side_position (Dimension_cache const * c)
+MAKE_SCHEME_CALLBACK (Side_position_interface,aligned_on_support_extents, 2);
+SCM
+Side_position_interface::aligned_on_support_extents (SCM element_smob, SCM axis)
{
- Score_element * me = (c->element_l ());
+ Grob *me = unsmob_grob (element_smob);
+ Axis a = (Axis) gh_scm2int (axis);
- Interval dim;
- Axis axis = c->axis ();
- Score_element *common = me->parent_l (axis);
- SCM support = me->get_elt_property ("side-support");
- for (SCM s = support; s != SCM_EOL; s = gh_cdr (s))
+ return general_side_position (me, a, true);
+}
+
+
+/*
+ Puts the element next to the support, optionally taking in
+ account the extent of the support.
+*/
+SCM
+Side_position_interface::general_side_position (Grob * me, Axis a, bool use_extents)
+{
+ Grob *common = me->get_parent (a);
+
+ /*
+ As this is only used as a callback, this is called only once. We
+ could wipe SIDE-SUPPORT-ELEMENTS after we retrieve it to conserve
+ memory; however -- we should look more into benefits of such actions?
+
+ The benefit is small, it seems: total GC times taken don't
+ differ. Would this also hamper Generational GC ?
+
+ */
+ SCM support = me->get_grob_property ("side-support-elements");
+ // me->remove_grob_property ("side-support-elements");
+ for (SCM s = support; s != SCM_EOL; s = ly_cdr (s))
{
- Score_element * e = unsmob_element ( gh_car (s));
+ Grob * e = unsmob_grob (ly_car (s));
if (e)
- common = common->common_refpoint (e, axis);
+ common = common->common_refpoint (e, a);
}
- for (SCM s = support; s != SCM_EOL; s = gh_cdr (s))
+ Interval dim;
+ for (SCM s = support; s != SCM_EOL; s = ly_cdr (s))
{
-
- Score_element * e = unsmob_element ( gh_car (s));
+ Grob * e = unsmob_grob (ly_car (s));
if (e)
- {
- Real coord = e->relative_coordinate (common, axis);
-
- dim.unite (coord + e->extent (axis));
- }
+ if (use_extents)
+ dim.unite (e->extent (common, a));
+ else
+ {
+ Real x = e->relative_coordinate (common, a);
+ dim.unite (Interval (x,x));
+ }
}
if (dim.empty_b ())
{
- dim = Interval(0,0);
+ dim = Interval (0,0);
}
- Direction dir = Side_position_interface (me).get_direction ();
+ Direction dir = Side_position_interface::get_direction (me);
- Real off = me->parent_l (axis)->relative_coordinate (common, axis);
- SCM minimum = me->remove_elt_property ("minimum-space");
+ Real off = me->get_parent (a)->relative_coordinate (common, a);
+ SCM minimum = me->remove_grob_property ("minimum-space");
- Real total_off = dim[dir] + off;
- SCM padding = me->remove_elt_property ("padding");
+ Real total_off = dim.linear_combination (dir) + off;
+ SCM padding = me->remove_grob_property ("padding");
if (gh_number_p (padding))
{
total_off += gh_scm2double (padding) * dir;
}
- if (gh_number_p (minimum) && total_off * dir < gh_scm2double (minimum))
+
+ if (gh_number_p (minimum)
+ && dir
+ && total_off * dir < gh_scm2double (minimum))
{
total_off = gh_scm2double (minimum) * dir;
}
+
if (fabs (total_off) > 100 CM)
programming_error ("Huh ? Improbable staff side dim.");
- return total_off;
+ return gh_double2scm (total_off);
+}
+
+/*
+ Cut & paste (ugh.)
+ */
+MAKE_SCHEME_CALLBACK (Side_position_interface,aligned_on_support_refpoints,2);
+SCM
+Side_position_interface::aligned_on_support_refpoints (SCM smob, SCM axis)
+{
+ Grob *me = unsmob_grob (smob);
+ Axis a = (Axis) gh_scm2int (axis);
+
+ return general_side_position (me, a, false);
}
+
/**
callback that centers the element on itself
+
+ Requires that self-alignment-{X,Y} be set.
*/
-Real
-Side_position_interface::aligned_on_self (Dimension_cache const *c)
+MAKE_SCHEME_CALLBACK (Side_position_interface,aligned_on_self,2);
+SCM
+Side_position_interface::aligned_on_self (SCM element_smob, SCM axis)
{
+ Grob *me = unsmob_grob (element_smob);
+ Axis a = (Axis) gh_scm2int (axis);
String s ("self-alignment-");
- Axis ax = c->axis ();
- s += (ax == X_AXIS) ? "X" : "Y";
- Score_element *elm = c->element_l ();
- SCM align (elm->get_elt_property (s));
- if (isdir_b (align))
+
+ s += (a == X_AXIS) ? "X" : "Y";
+
+ SCM align (me->get_grob_property (s.ch_C ()));
+ if (gh_number_p (align))
{
- Direction d = to_dir (align);
- Interval ext(elm->extent (ax));
+ Interval ext (me->extent (me,a));
if (ext.empty_b ())
{
programming_error ("I'm empty. Can't align on self");
- return 0.0;
+ return gh_double2scm (0.0);
}
- else if (d)
+ else
{
- return - ext[d];
+ return gh_double2scm (- ext.linear_combination (gh_scm2double (align)));
}
- return - ext.center ();
}
- else
- return 0.0;
+ else if (unsmob_grob (align))
+ {
+ return gh_double2scm (- unsmob_grob (align)->relative_coordinate (me, a));
+ }
+ return gh_double2scm (0.0);
}
/*
Callback that quantises in staff-spaces, rounding in the direction
- of the elements "direction" elt property. */
-Real
-Side_position_interface::quantised_position (Dimension_cache const *c)
+ of the elements "direction" elt property.
+
+ Only rounds when we're inside the staff, as determined by
+ Staff_symbol_referencer::staff_radius () */
+MAKE_SCHEME_CALLBACK (Side_position_interface,quantised_position,2);
+SCM
+Side_position_interface::quantised_position (SCM element_smob, SCM)
{
- Score_element * me = (c->element_l ());
- Side_position_interface s(me);
- Direction d = s.get_direction ();
- Staff_symbol_referencer_interface si (me);
+ Grob *me = unsmob_grob (element_smob);
+
+
+ Direction d = Side_position_interface::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);
- 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_space () / 2.0;
+ return gh_double2scm ((rp - p) * Staff_symbol_referencer::staff_space (me) / 2.0);
}
- return 0.0;
+ return gh_double2scm (0.0);
}
/*
Position next to support, taking into account my own dimensions and padding.
*/
-Real
-Side_position_interface::aligned_side (Dimension_cache const *c)
+MAKE_SCHEME_CALLBACK (Side_position_interface,aligned_side,2);
+SCM
+Side_position_interface::aligned_side (SCM element_smob, SCM axis)
{
- Score_element * me = (c->element_l ());
- Side_position_interface s(me);
- Direction d = s.get_direction ();
- Axis ax = c->axis ();
- Real o = side_position (c);
+ Grob *me = unsmob_grob (element_smob);
+ Axis a = (Axis) gh_scm2int (axis);
+
+ Direction d = Side_position_interface::get_direction (me);
+
+ Real o = gh_scm2double (aligned_on_support_extents (element_smob,axis));
- Interval iv = me->extent (ax);
+ Interval iv = me->extent (me, a);
if (!iv.empty_b ())
{
+ if (!d)
+ {
+ programming_error ("Direction unknown, but aligned-side wanted.");
+ d = DOWN;
+ }
o += - iv[-d];
- SCM pad = me->get_elt_property ("padding");
+ SCM pad = me->get_grob_property ("padding");
if (gh_number_p (pad))
o += d *gh_scm2double (pad) ;
}
- return o;
+ return gh_double2scm (o);
}
/*
Position centered on parent.
*/
-Real
-Side_position_interface::centered_on_parent (Dimension_cache const *c)
+MAKE_SCHEME_CALLBACK (Side_position_interface,centered_on_parent,2);
+SCM
+Side_position_interface::centered_on_parent (SCM element_smob, SCM axis)
{
+ Grob *me = unsmob_grob (element_smob);
+ Axis a = (Axis) gh_scm2int (axis);
+ Grob *him = me->get_parent (a);
- Score_element *me = c->element_l ();
- Axis a = c->axis ();
- Score_element *him = me->parent_l (a);
-
- return him->extent (a).center ();
+ return gh_double2scm (him->extent (him,a).center ());
}
void
-Side_position_interface::add_staff_support ()
+Side_position_interface::add_staff_support (Grob*me)
{
- Staff_symbol_referencer_interface si (elt_l_);
- if (si.staff_symbol_l ())
+ Grob* st = Staff_symbol_referencer::staff_symbol_l (me);
+ if (st && get_axis (me) == Y_AXIS)
{
- add_support (si.staff_symbol_l ());
+ add_support (me,st);
}
}
void
-Side_position_interface::set_axis (Axis a)
+Side_position_interface::set_axis (Grob*me, Axis a)
{
- // prop transparent ?
- if (elt_l_->get_elt_property ("side-support") == SCM_UNDEFINED)
- elt_l_->set_elt_property ("side-support" ,SCM_EOL);
-
- if (!elt_l_->has_offset_callback_b (aligned_side, a))
- elt_l_->add_offset_callback (aligned_side, a);
+ me->add_offset_callback (Side_position_interface::aligned_side_proc, a);
}
-void
-Side_position_interface::set_quantised (Axis a)
-{
- elt_l_->add_offset_callback (quantised_position, a);
-}
+// ugh. doesn't cactch all variants.
Axis
-Side_position_interface::get_axis () const
+Side_position_interface::get_axis (Grob*me)
{
- if (elt_l_->has_offset_callback_b (&side_position, X_AXIS)
- || elt_l_->has_offset_callback_b (&aligned_side , X_AXIS))
+ if (me->has_offset_callback_b (Side_position_interface::aligned_side_proc, X_AXIS)
+ || me->has_offset_callback_b (Side_position_interface::aligned_side_proc , X_AXIS))
return X_AXIS;
}
void
-Side_position_interface::set_direction (Direction d)
+Side_position_interface::set_direction (Grob*me, Direction d)
{
- elt_l_->set_elt_property ("direction", gh_int2scm (d));
+ me->set_grob_property ("direction", gh_int2scm (d));
}
void
-Side_position_interface::set_minimum_space (Real m)
+Side_position_interface::set_minimum_space (Grob*me, Real m)
{
- elt_l_->set_elt_property ("minimum-space", gh_double2scm (m));
+ me->set_grob_property ("minimum-space", gh_double2scm (m));
}
void
-Side_position_interface::set_padding (Real p)
+Side_position_interface::set_padding (Grob*me, Real p)
{
- elt_l_->set_elt_property ("padding", gh_double2scm (p));
+ me->set_grob_property ("padding", gh_double2scm (p));
}
bool
-Side_position_interface::has_interface_b () const
+Side_position_interface::has_interface (Grob*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_interface::supported_b (Grob*me)
{
- SCM s =elt_l_->get_elt_property ("side-support");
- return s != SCM_UNDEFINED && s != SCM_EOL;
+ SCM s = me->get_grob_property ("side-support-elements");
+ return gh_pair_p (s);
}
-Side_position_interface
-side_position (Score_element* e)
-{
- Side_position_interface si (e);
- return si;
-}
projects / lilypond.git / blobdiff