#include "staff-symbol-referencer.hh"
#include "font-interface.hh"
#include "warn.hh"
+#include "align-interface.hh"
#include <math.h>
return list;
}
+MAKE_SCHEME_CALLBACK(Line_spanner, after_line_breaking, 1);
+SCM
+Line_spanner::after_line_breaking (SCM g)
+{
+ Grob *me = unsmob_grob (g);
+ Spanner*sp = dynamic_cast<Spanner*> (me);
+
+ /*
+ We remove the line at the start of the line. For piano voice
+ indicators, it makes no sense to have them at the start of the
+ line.
+
+ I'm not sure what the official rules for glissandi are, but
+ usually the 2nd note of the glissando is "exact", so when playing
+ from the start of the line, there is no need to glide.
+
+ From a typographical p.o.v. this makes sense, since the amount of
+ space left of a note at the start of a line is very small.
+
+ --hwn.
+
+ */
+ if (sp->get_bound (LEFT)->break_status_dir()
+ && !sp->get_bound (RIGHT)->break_status_dir())
+ {
+ /*
+ Can't do suicide, since this mucks up finding the trend.
+ */
+ me->set_grob_property ("molecule-callback", SCM_EOL);
+
+ }
+ return SCM_EOL;
+}
Molecule
return mol;
}
-Offset
-Line_spanner::get_broken_offset (Grob *me, Direction dir)
+/*
+ Find a common Y parent, which --if found-- should be the
+ fixed-distance alignment.
+ */
+Grob *
+line_spanner_common_parent (Grob *me)
{
- Spanner *spanner = dynamic_cast<Spanner*> (me);
- Item* bound = spanner->get_bound (dir);
-
- if (!bound->break_status_dir ())
+ Grob * common = find_fixed_alignment_parent (me);
+ if (!common)
{
- Grob *common[] = {
- bound->common_refpoint (Staff_symbol_referencer::get_staff_symbol (me),
- X_AXIS),
- bound->common_refpoint (Staff_symbol_referencer::get_staff_symbol (me),
- Y_AXIS)
- };
-
- return Offset (abs (bound->extent (common[X_AXIS], X_AXIS)[-dir]),
- bound->extent (common[Y_AXIS], Y_AXIS).center ());
+ common = Staff_symbol_referencer::get_staff_symbol (me);
+ if (common)
+ common = common->get_parent (Y_AXIS);
+ else
+ common = me->get_parent (Y_AXIS);
}
- return Offset ();
-}
-/* A broken line-spaner should maintain the same vertical trend
- the unbroken line-spanner would have had.
- From slur */
-Offset
-Line_spanner::broken_trend_offset (Grob *me, Direction dir)
-{
- Offset o;
-
- if (Spanner *mother = dynamic_cast<Spanner*> (me->original_))
- {
- int k = broken_spanner_index (dynamic_cast<Spanner*> (me));
- Grob *neighbour = mother->broken_intos_[k + dir];
- Offset neighbour_o = get_broken_offset (neighbour, dir);
- Offset me_o = get_broken_offset (me, -dir);
-
- // Hmm, why not return me_o[X], but recalc in brew_mol?
- o = Offset (0,
- (neighbour_o[Y_AXIS]*me_o[X_AXIS]
- - me_o[Y_AXIS]*neighbour_o[X_AXIS]) * dir /
- (me_o[X_AXIS] + neighbour_o[X_AXIS]));
- }
- return o;
+ return common;
}
-
/*
Warning: this thing is a cross-staff object, so it should have empty Y-dimensions.
*/
+
MAKE_SCHEME_CALLBACK (Line_spanner, brew_molecule, 1);
SCM
Line_spanner::brew_molecule (SCM smob)
{
- Grob *me= unsmob_grob (smob);
+ Spanner *me = dynamic_cast<Spanner*> (unsmob_grob (smob));
- Spanner *spanner = dynamic_cast<Spanner*> (me);
- Drul_array<Item*> bound (spanner->get_bound (LEFT),
- spanner->get_bound (RIGHT));
+ Drul_array<Item*> bound (me->get_bound (LEFT),
+ me->get_bound (RIGHT));
- Grob *common[] = { me, me };
- for (int a = X_AXIS; a < NO_AXES; a++)
- {
- common[a] = me->common_refpoint (bound[RIGHT], Axis (a));
- common[a] = common[a]->common_refpoint (bound[LEFT], Axis (a));
-
- if (!common[a])
- {
- programming_error ("No common point!");
- return SCM_EOL;
- }
- }
Real gap = gh_scm2double (me->get_grob_property ("gap"));
Offset dxy ;
Offset my_off;
Offset his_off;
+
+ Real thick = me->get_paper ()->get_var ("linethickness");
+ SCM s = me->get_grob_property ("thickness");
+ if (gh_number_p (s))
+ thick *= gh_scm2double (s);
-
- if (bound[LEFT]->break_status_dir () || bound[RIGHT]->break_status_dir ())
- /* across line break */
+ if (bound[RIGHT]->break_status_dir())
{
- Direction broken = bound[LEFT]->break_status_dir () ? LEFT : RIGHT;
-
- dxy[X_AXIS] = bound[RIGHT]->extent (common[X_AXIS], X_AXIS)[LEFT]
- - bound[LEFT]->extent (common[X_AXIS], X_AXIS)[RIGHT];
-
- dxy += broken_trend_offset (me, broken);
- dxy[X_AXIS] -= 1 * gap;
+ if (bound[LEFT]->break_status_dir ())
+ {
+ programming_error ("line-spanner with two broken ends. Farewell sweet world.");
- my_off = Offset (0,
- me->relative_coordinate (common[Y_AXIS], Y_AXIS));
+ me->suicide();
+ return SCM_EOL;
+ }
- his_off = Offset (0,
- bound[-broken]->relative_coordinate (common[Y_AXIS],
- Y_AXIS));
+ /*
+ This is hairy. For the normal case, we simply find common
+ parents, and draw a line between the bounds. When two note
+ heads are on different lines, there is no common parent
+ anymore. We have to find the piano-staff object.
+ */
+
+ int k = broken_spanner_index (me);
+ Spanner * parent_sp = dynamic_cast<Spanner*> (me->original_);
+ Spanner * next_sp = parent_sp->broken_intos_ [k+1];
+ Item * next_bound = next_sp->get_bound (RIGHT);
- if (broken == LEFT)
+ if (next_bound->break_status_dir())
{
- my_off[Y_AXIS] += dxy[Y_AXIS];
+ programming_error ("no note heads for the line spanner on next line?"
+ " Confused.");
+ me->suicide();
+ return SCM_EOL;
}
+
+ Grob *commonx = bound[LEFT]->common_refpoint (bound[RIGHT], X_AXIS);
+ commonx = me->common_refpoint (commonx, X_AXIS);
+
+ Grob * next_common_y = line_spanner_common_parent (next_bound);
+ Grob * this_common_y = line_spanner_common_parent (bound[LEFT]);
+
+ Grob * all_common_y = me->common_refpoint (this_common_y, Y_AXIS);
+
+ Interval next_ext = next_bound->extent (next_common_y, Y_AXIS);
+ Interval this_ext = bound[LEFT]->extent (this_common_y, Y_AXIS);
+
+ Real yoff = this_common_y->relative_coordinate (all_common_y, Y_AXIS);
+
+ Offset p1 (bound[LEFT]->extent (commonx, X_AXIS)[RIGHT],
+ this_ext.center () + yoff);
+ Offset p2 (bound[RIGHT]->extent (commonx, X_AXIS)[LEFT],
+ next_ext.center () + yoff);
+
+ Offset dz (p2 -p1);
+ Real len = dz.length ();
+
+ Offset dir = dz *(1/ len);
+ dz = (dz.length () - 2*gap) *dir;
+
+
+ Molecule l (line_molecule (me, thick, dz[X_AXIS],
+ dz[Y_AXIS]));
+
+ l.translate (dir * gap + p1
+ - Offset (me->relative_coordinate (commonx, X_AXIS),
+ me->relative_coordinate (all_common_y, Y_AXIS)));
+
+ return l.smobbed_copy ();
}
else
{
- Real off = gap + ((bound[LEFT]->extent (bound[LEFT], X_AXIS).length ()*3)/4); // distance from center to start of line
+ Grob *common[] = { me, me };
+ for (int a = X_AXIS; a < NO_AXES; a++)
+ {
+ common[a] = me->common_refpoint (bound[RIGHT], Axis (a));
+ common[a] = common[a]->common_refpoint (bound[LEFT], Axis (a));
+ }
+
+ // distance from center to start of line
+ Real off = gap + ((bound[LEFT]->extent (bound[LEFT], X_AXIS).length ()*3)/4);
for (int a = X_AXIS; a < NO_AXES; a++)
{
ofxy = dxy * (off/dxy.length ());
dxy -= 2*ofxy;
- }
-
- Real thick = me->get_paper ()->get_var ("linethickness");
-
- SCM s = me->get_grob_property ("thickness");
- if (gh_number_p (s))
- thick *= gh_scm2double (s);
-
- Molecule line = line_molecule (me, thick, dxy[X_AXIS], dxy[Y_AXIS]);
- line.translate_axis (bound[LEFT]->extent (bound[LEFT],
- X_AXIS).length ()/2, X_AXIS);
- line.translate (ofxy - my_off + his_off);
- return line.smobbed_copy ();
+ Molecule line = line_molecule (me, thick, dxy[X_AXIS], dxy[Y_AXIS]);
+ line.translate_axis (bound[LEFT]->extent (bound[LEFT],
+ X_AXIS).length ()/2, X_AXIS);
+ line.translate (ofxy - my_off + his_off);
+ return line.smobbed_copy ();
+ }
}
-
ADD_INTERFACE (Line_spanner, "line-spanner-interface",
"Generic line drawn between two objects, eg. for use with glissandi.\n"
"gap is measured in staff-spaces.\n"
projects / lilypond.git / commitdiff