/*
- break-align-item.cc -- implement Break_align_item
+ break-align-item.cc -- implement Break_align_interface
source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
+
+
#include <math.h>
-#include <libc-extension.hh>
+#include <libc-extension.hh> // isinf
#include "side-position-interface.hh"
+#include "axis-group-interface.hh"
#include "warn.hh"
-#include "dimension-cache.hh"
#include "lily-guile.hh"
#include "break-align-item.hh"
#include "dimensions.hh"
-#include "paper-score.hh"
#include "paper-def.hh"
#include "paper-column.hh"
#include "group-interface.hh"
#include "align-interface.hh"
-void
-Break_align_item::before_line_breaking ()
+MAKE_SCHEME_CALLBACK (Break_align_interface,before_line_breaking,1);
+
+SCM
+Break_align_interface::before_line_breaking (SCM smob)
+{
+ Grob* me = unsmob_grob (smob);
+ do_alignment (me);
+ return SCM_UNSPECIFIED;
+}
+MAKE_SCHEME_CALLBACK (Break_align_interface,alignment_callback,2);
+
+SCM
+Break_align_interface::alignment_callback (SCM element_smob, SCM axis)
{
- if (break_status_dir() == LEFT)
+ Grob *me = unsmob_grob (element_smob);
+ Axis a = (Axis) gh_scm2int (axis);
+
+ assert (a == X_AXIS);
+ Grob *par = me->parent_l (a);
+ if (par && !to_boolean (par->get_grob_property ("break-alignment-done")))\
{
- set_elt_property ("self-alignment-X", gh_int2scm (RIGHT));
+ par->set_grob_property ("break-alignment-done", SCM_BOOL_T);
+ Break_align_interface::do_alignment (par);
}
- else
+
+ return gh_double2scm (0);
+}
+
+MAKE_SCHEME_CALLBACK (Break_align_interface,self_align_callback,2);
+SCM
+Break_align_interface::self_align_callback (SCM element_smob, SCM axis)
+{
+ Grob *me = unsmob_grob (element_smob);
+ Axis a = (Axis) gh_scm2int (axis);
+ assert (a == X_AXIS);
+
+ Item* item = dynamic_cast<Item*> (me);
+ Direction bsd = item->break_status_dir ();
+ if (bsd == LEFT)
{
- add_offset_callback (Align_interface::center_on_element, X_AXIS);
+ me->set_grob_property ("self-alignment-X", gh_int2scm (RIGHT));
}
+
+ /*
+ Force break alignment itself to be done first, in the case
+ */
+
+ return Side_position_interface::aligned_on_self (element_smob, axis);
+}
+void
+Break_align_interface::add_element (Grob*me, Grob *toadd)
+{
+ Axis_group_interface::add_element (me, toadd);
+}
+
+void
+Break_align_interface::do_alignment (Grob *me)
+{
+ Item * item = dynamic_cast<Item*> (me);
+ Item *column = item->column_l ();
- Real interline= paper_l ()->get_var ("interline");
- Link_array<Score_element> elems;
- Link_array<Score_element> all_elems
- = Pointer_group_interface__extract_elements (this, (Score_element*)0,
- "elements");
+ Link_array<Grob> elems;
+ Link_array<Grob> all_elems
+ = Pointer_group_interface__extract_elements (me, (Grob*)0,
+ "elements");
- for (int i=0; i < all_elems.size(); i++)
+ for (int i=0; i < all_elems.size (); i++)
{
- Interval y = all_elems[i]->extent(X_AXIS);
- if (!y.empty_b())
- elems.push (dynamic_cast<Score_element*> (all_elems[i]));
+ Interval y = all_elems[i]->extent (all_elems[i], X_AXIS);
+ if (!y.empty_b ())
+ elems.push (dynamic_cast<Grob*> (all_elems[i]));
}
if (!elems.size ())
SCM current_origin = ly_symbol2scm ("none");
for (int i=0; i <= elems.size (); i++)
{
- Score_element *next_elt = i < elems.size ()
+ Grob *next_elt = i < elems.size ()
? elems[i]
: 0 ;
if (next_elt)
{
- next_origin = next_elt->get_elt_property ("break-align-symbol");
+ next_origin = next_elt->get_grob_property ("break-align-symbol");
next_origin =
- (next_origin == SCM_UNDEFINED)
- ? ly_symbol2scm ("none")
- : next_origin;
+ gh_symbol_p (next_origin)?
+ next_origin : ly_symbol2scm ("none")
+;
}
else
next_origin = ly_symbol2scm ("begin-of-note");
-
- SCM e = scm_assoc (scm_listify (current_origin,
+
+ SCM alist = me->get_grob_property ("space-alist");
+ SCM e = scm_assoc (scm_list_n (current_origin,
next_origin,
- SCM_UNDEFINED),
- scm_eval (ly_symbol2scm ("space-alist")));
-
+ SCM_UNDEFINED), alist);
+
SCM extra_space;
if (e != SCM_BOOL_F)
{
- extra_space = gh_cdr (e);
+ extra_space = ly_cdr (e);
}
else
{
warning (_f ("unknown spacing pair `%s', `%s'",
ly_symbol2string (current_origin),
ly_symbol2string (next_origin)));
- extra_space = scm_listify (ly_symbol2scm ("minimum-space"), gh_double2scm (0.0), SCM_UNDEFINED);
+ extra_space = scm_list_n (ly_symbol2scm ("minimum-space"), gh_double2scm (0.0), SCM_UNDEFINED);
}
- SCM symbol = gh_car (extra_space);
- Real spc = gh_scm2double (SCM_CADR(extra_space));
- spc *= interline;
+ SCM symbol = ly_car (extra_space);
+ Real spc = gh_scm2double (ly_cadr (extra_space));
- dists.push(spc);
+ dists.push (spc);
symbol_list = gh_cons (symbol, symbol_list);
current_origin = next_origin;
}
// skip the first sym.
- symbol_list = gh_cdr (scm_reverse (symbol_list));
- for (int i=0; i <elems.size()-1; i++)
+ symbol_list = ly_cdr (scm_reverse (symbol_list));
+ for (int i=0; i <elems.size ()-1; i++)
{
- String sym_str = ly_symbol2string (gh_car (symbol_list));
- elems[i]->set_elt_property (sym_str,
- scm_cons (gh_double2scm (0),
+ elems[i]->internal_set_grob_property (ly_car (symbol_list),
+ scm_cons (gh_double2scm (0),
gh_double2scm (dists[i+1])));
- symbol_list = gh_cdr (symbol_list);
+ symbol_list = ly_cdr (symbol_list);
}
// urg
- SCM first_pair = elems[0]->get_elt_property ("minimum-space");
+ SCM first_pair = elems[0]->get_grob_property ("minimum-space");
if (gh_pair_p (first_pair))
first_pair = first_pair;
else
first_pair = gh_cons (gh_double2scm (0.0), gh_double2scm (0.0));
scm_set_car_x (first_pair, gh_double2scm (-dists[0]));
- elems[0]->set_elt_property ("minimum-space", first_pair);
+ elems[0]->set_grob_property ("minimum-space", first_pair);
+ Direction bsd = item->break_status_dir ();
+ if (bsd == LEFT)
+ {
+ me->set_grob_property ("self-alignment-X", gh_int2scm (RIGHT));
+ }
/*
Force callbacks for alignment to be called
- */
- Real unused = elems[0]->relative_coordinate (this, X_AXIS);
- Real pre_space = elems[0]->relative_coordinate (column_l (), X_AXIS);
+ */
+ Align_interface::align_elements_to_extents (me, X_AXIS);
+
+ Real pre_space = elems[0]->relative_coordinate (column, X_AXIS);
- Real xl = elems[0]->extent (X_AXIS)[LEFT];
+ Real xl = elems[0]->extent (elems[0],X_AXIS)[LEFT];
if (!isinf (xl))
pre_space += xl;
else
programming_error ("Infinity reached. ");
- Real xr = elems.top ()->extent (X_AXIS)[RIGHT];
- Real spring_len = elems.top ()->relative_coordinate (column_l (), X_AXIS);
+ Real xr = elems.top ()->extent (elems.top (), X_AXIS)[RIGHT];
+ Real spring_len = elems.top ()->relative_coordinate (column, X_AXIS);
if (!isinf (xr))
spring_len += xr;
else
Real stretch_distance =0.;
- if (gh_car (symbol_list) == ly_symbol2scm ("extra-space"))
+ if (ly_car (symbol_list) == ly_symbol2scm ("extra-space"))
{
spring_len += dists.top ();
stretch_distance = dists.top ();
}
- else if (gh_car (symbol_list) == ly_symbol2scm ("minimum-space"))
+ else if (ly_car (symbol_list) == ly_symbol2scm ("minimum-space"))
{
spring_len = spring_len >? dists.top ();
stretch_distance = spring_len;
}
+
/*
Hint the spacing engine how much space to put in.
The pairs are in the format of an interval (ie. CAR < CDR).
*/
- column_l ()->set_elt_property ("extra-space",
- scm_cons (gh_double2scm (pre_space),
- gh_double2scm (spring_len)));
-
- column_l ()->set_elt_property ("stretch-distance",
- gh_cons (gh_double2scm (-dists[0]),
- gh_double2scm (stretch_distance)));
-
-}
+ /*
+ UGH UGH UGH
-Break_align_item::Break_align_item (SCM s)
- : Item (s)
-{
- set_elt_property ("stacking-dir" , gh_int2scm (RIGHT));
+ This is a side effect, and there is no guarantee that this info is
+ computed at a "sane" moment.
+
+ (just spent some time tracking a bug that was caused by this info
+ being written halfway:
+
+ self_alignment_callback (*)
+ -> child->relative_coordinate (self)
+ -> break_alignment
+ -> child->relative_coordinate (column)
- Align_interface (this).set_interface ();
- Align_interface (this).set_axis (X_AXIS);
+ the last call incorporates the value that should've been computed
+ in (*), but--of course-- is not yet.
+
+ The result is that an offsets of align_elements_to_extents () are
+ not compensated for, and spring_len is completely off.
+
+
+ */
+ column->set_grob_property ("extra-space",
+ scm_cons (gh_double2scm (pre_space),
+ gh_double2scm (spring_len)));
- add_offset_callback (Side_position_interface::aligned_on_self, X_AXIS);
+ column->set_grob_property ("stretch-distance",
+ gh_cons (gh_double2scm (-dists[0]),
+ gh_double2scm (stretch_distance)));
+}
+
+
+void
+Break_align_interface::set_interface (Grob*me)
+{
+ Align_interface::set_interface (me);
+ Align_interface::set_axis (me,X_AXIS);
}
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