source file of the GNU LilyPond music typesetter
- (c) 2001--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2001--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "staff-spacing.hh"
Staff_spacing::next_note_correction (Grob *me,
Grob *g,
Interval bar_size,
+ Real current_space, Real current_fixed,
Real *space,
- Real *fix)
+ Real *fix,
+ int *wish_count)
{
- (void)space;
-
+ (void) current_fixed;
if (!g || !Note_column::has_interface (g))
return ;
Item *col = dynamic_cast<Item *> (g)->get_column ();
- Real max_corr = max (0., (- g->extent (col, X_AXIS)[LEFT]));
+ Real left_stickout_correction = max (0., (- g->extent (col, X_AXIS)[LEFT]));
+
+ /* staff space -> positions */
+ bar_size *= 2;
/*
Duh. If this gets out of hand, we should invent something more generic.
*/
- if (Grob *a = Note_column::accidentals (g))
+ Grob *accs = Note_column::accidentals (g);
+ if (accs)
{
Interval v;
- if (Accidental_placement::has_interface (a))
- v = Accidental_placement::get_relevant_accidental_extent (a, col, me);
+ if (Accidental_placement::has_interface (accs))
+ v = Accidental_placement::get_relevant_accidental_extent (accs, col, me);
else
- v = a->extent (col, X_AXIS);
-
- max_corr = max (max_corr, (- v[LEFT]));
+ v = accs->extent (col, X_AXIS);
+
+ left_stickout_correction = max (left_stickout_correction, (- v[LEFT]));
}
- if (Grob *a = unsmob_grob (g->get_object ("arpeggio")))
- max_corr = max (max_corr, - a->extent (col, X_AXIS)[LEFT]);
+ Grob *arpeggio = unsmob_grob (g->get_object ("arpeggio"));
+ if (arpeggio)
+ left_stickout_correction = max (left_stickout_correction, - arpeggio->extent (col, X_AXIS)[LEFT]);
+
/*
Let's decrease the space a little if the problem is not located
after a barline.
*/
if (bar_size.is_empty ())
- max_corr *= 0.75;
-
- if (!bar_size.is_empty ())
- if (Grob *stem = Note_column::get_stem (g))
- {
- Direction d = get_grob_direction (stem);
- if (d == DOWN)
- {
- Real stem_start = Stem::head_positions (stem) [DOWN];
- Real stem_end = Stem::stem_end_position (stem);
- Interval stem_posns (min (stem_start, stem_end),
- max (stem_end, stem_start));
-
- stem_posns.intersect (bar_size);
-
- Real corr = min (abs (stem_posns.length () / 7.0), 1.0);
- corr *= robust_scm2double (me->get_property ("stem-spacing-correction"), 1);
-
- if (d != DOWN)
- corr = 0.0;
- max_corr = max (max_corr, corr);
- }
- }
-
- *fix += max_corr;
-}
+ left_stickout_correction *= 0.75;
+
+ /*
+ We want 0.3 ss before the sticking-out object.
+
+ current_fixed/2 is our guess at (right side of left object + 0.3)
+ */
+ left_stickout_correction += current_fixed/2 - current_space;
+ left_stickout_correction = max (left_stickout_correction, 0.0);
+
+ Real optical_corr = 0.0;
+ Grob *stem = Note_column::get_stem (g);
+ if (!bar_size.is_empty ()
+ && !arpeggio
+ && !accs
+ && stem)
+ {
+ Direction d = get_grob_direction (stem);
+ if (Stem::is_normal_stem (stem) && d == DOWN)
+ {
+
+ /*
+ can't look at stem-end-position, since that triggers
+ beam slope computations.
+ */
+ Real stem_start = Stem::head_positions (stem) [d];
+ Real stem_end = stem_start +
+ d * robust_scm2double (stem->get_property ("length"), 7);
+
+ Interval stem_posns (min (stem_start, stem_end),
+ max (stem_end, stem_start));
+
+ stem_posns.intersect (bar_size);
+
+ optical_corr = min (abs (stem_posns.length () / 7.0), 1.0);
+ optical_corr *= robust_scm2double (me->get_property ("stem-spacing-correction"), 1);
+ }
+ }
+
+
+ Real correction = optical_corr + left_stickout_correction;
+ if (correction)
+ {
+ (*wish_count) ++;
+
+ /*
+ This minute adjustments don't make sense for widely spaced scores.
+ Hence, we need to keep the stretchable (that is, space - fix)
+ distance equal.
+ */
+ *space += correction;
+ *fix += correction;
+ }
+}
/*
Y-positions that are covered by BAR_GROB, in the case that it is a
barline. */
SCM glyph = bar_grob->get_property ("glyph-name");
Grob *staff_sym = Staff_symbol_referencer::get_staff_symbol (bar_grob);
- String glyph_string = scm_is_string (glyph) ? ly_scm2string (glyph) : "";
- if (glyph_string.left_string (1) == "|" || glyph_string.left_string (1) == ".")
+ string glyph_string = scm_is_string (glyph) ? ly_scm2string (glyph) : "";
+ if (glyph_string.substr (0, 1) == "|"
+ || glyph_string.substr (0, 1) == ".")
{
Grob *common = bar_grob->common_refpoint (staff_sym, Y_AXIS);
- Interval bar_size = bar_grob->extent (common, Y_AXIS);
+ bar_size = bar_grob->extent (common, Y_AXIS);
bar_size *= 1.0 / Staff_symbol_referencer::staff_space (bar_grob);
}
}
pointers to the separation-items, not the note-columns or
note-spacings.
*/
+
void
Staff_spacing::next_notes_correction (Grob *me, Grob *last_grob,
+ Real current_space, Real current_fixed,
Real *compound_space, Real *compound_fixed
)
{
*compound_fixed = 0.0;
*compound_space = 0.0;
- int wishes;
-
- for (int i = right_items.size (); i--;)
+ int wish_count = 0;
+
+ for (vsize i = right_items.size (); i--;)
{
Grob *g = right_items[i];
-
- Real space = 0.0;
- Real fixed = 0.0;
-
- next_note_correction (me, g, bar_size, &space, &fixed);
-
- *compound_space += space;
- *compound_fixed += fixed;
- wishes ++;
-
- extract_grob_set (g, "elements", elts);
- for (int j = elts.size (); j--;)
+ if (Note_column::has_interface (right_items[i]))
{
+ Grob *g = right_items[i];
+
Real space = 0.0;
Real fixed = 0.0;
- next_note_correction (me, elts[j], bar_size, &space, &fixed);
- *compound_fixed += fixed;
+
+ next_note_correction (me, g, bar_size,
+ current_space, current_fixed,
+ &space, &fixed, &wish_count);
+
*compound_space += space;
- wishes ++;
+ *compound_fixed += fixed;
+ }
+ else
+ {
+ extract_grob_set (g, "elements", elts);
+ for (vsize j = elts.size (); j--;)
+ {
+ Real space = 0.0;
+ Real fixed = 0.0;
+ next_note_correction (me, elts[j], bar_size,
+ current_space, current_fixed,
+ &space, &fixed,
+ &wish_count);
+ *compound_fixed += fixed;
+ *compound_space += space;
+ }
}
}
-
- if (wishes)
+
+ if (wish_count > 1)
{
- *compound_space /= wishes;
- *compound_fixed /= wishes;
+ *compound_space /= wish_count;
+ *compound_fixed /= wish_count;
}
}
Item *me_item = dynamic_cast<Item *> (me);
extract_grob_set (me, "left-items", items);
- for (int i = items.size (); i--;)
+ for (vsize i = items.size (); i--;)
{
Grob *cand = items[i];
if (cand && Separation_item::has_interface (cand))
*fixed = *space;
}
- Real correction_fixed, correction_space;
- next_notes_correction (me, last_grob, &correction_space, &correction_fixed );
+ Real correction_fixed = 0.0;
+ Real correction_space = 0.0;
+ next_notes_correction (me, last_grob,
+ *space, *fixed,
+ &correction_space, &correction_fixed );
*space += correction_space;
*fixed += correction_fixed;
}
-ADD_INTERFACE (Staff_spacing, "staff-spacing-interface",
+ADD_INTERFACE (Staff_spacing,
"This object calculates spacing details from a "
" breakable symbol (left) to another object. For example, it takes care "
" of optical spacing from a bar lines to a note.",
- "stem-spacing-correction left-items right-items");
+
+ /* properties */
+ "stem-spacing-correction "
+ "left-items "
+ "right-items "
+ );
projects / lilypond.git / blobdiff