source file of the GNU LilyPond music typesetter
- (c) 2001--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 2001--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "note-spacing.hh"
#include "warn.hh"
#include "stem.hh"
#include "separation-item.hh"
+#include "spacing-interface.hh"
#include "staff-spacing.hh"
#include "accidental-placement.hh"
#include "output-def.hh"
spacing?
*/
-void
+Spring
Note_spacing::get_spacing (Grob *me, Item *right_col,
- Real base_space, Real increment, Real *space, Real *fixed)
+ Real base_space, Real increment)
{
- Drul_array<SCM> props (me->get_object ("left-items"),
- me->get_object ("right-items"));
- Direction d = LEFT;
- Direction col_dir = right_col->break_status_dir ();
- Drul_array<Interval> extents;
+ vector<Item*> note_columns = Spacing_interface::left_note_columns (me);
+ Real left_head_end = 0;
- Interval left_head_wid;
- do
+ for (vsize i = 0; i < note_columns.size (); i++)
{
- Link_array<Grob> const &items (ly_scm2link_array (props [d]));
- for (int i = items.size (); i--;)
- {
- Item *it = dynamic_cast<Item *> (items[i]);
-
- if (d == RIGHT && it->break_status_dir () != col_dir)
- it = it->find_prebroken_piece (col_dir);
-
- /*
- some kind of mismatch, eg. a note column, that is behind a
- linebreak.
- */
- if (!it)
- continue;
-
- Item *it_col = it->get_column ();
- if (d == RIGHT && right_col != it_col)
- continue;
-
- if (Separation_item::has_interface (it))
- {
- extents[d].unite (Separation_item::width (it));
- continue;
- }
-
- if (d == LEFT)
- {
- SCM r = it->get_object ("rest");
- Grob *g = unsmob_grob (r);
- if (!g)
- g = Note_column::first_head (it);
-
- /*
- Ugh. If Stem is switched off, we don't know what the
- first note head will be.
- */
- if (g)
- left_head_wid = g->extent (it_col, X_AXIS);
- }
-
- extents[d].unite (it->extent (it_col, X_AXIS));
- if (d == RIGHT)
- {
- Grob *accs = Note_column::accidentals (it);
- if (!accs)
- accs = Note_column::accidentals (it->get_parent (X_AXIS));
-
- if (accs)
- {
- Interval v
- = Accidental_placement::get_relevant_accidental_extent (accs, it_col, me);
-
- extents[d].unite (v);
- }
-
- if (Grob *arpeggio = Note_column::arpeggio (it))
- extents[d].unite (arpeggio->extent (it_col, X_AXIS));
- }
- }
-
- if (extents[d].is_empty ())
- extents[d] = Interval (0, 0);
+ SCM r = note_columns[i]->get_object ("rest");
+ Grob *g = unsmob_grob (r);
+ Grob *col = note_columns[i]->get_column ();
+
+ if (!g)
+ g = Note_column::first_head (note_columns[i]);
+
+ /*
+ Ugh. If Stem is switched off, we don't know what the
+ first note head will be.
+ */
+ if (g)
+ {
+ if (g->common_refpoint (col, X_AXIS) != col)
+ programming_error ("Note_spacing::get_spacing (): Common refpoint incorrect");
+ else
+ left_head_end = g->extent (col, X_AXIS)[RIGHT];
+ }
}
- while (flip (&d) != LEFT);
/*
- We look at the width of the note head, since smaller heads get less space
- eg. a quarter rest gets almost 0.5 ss less horizontal space than a note.
-
- What is sticking out of the note head (eg. a flag), doesn't get
- the full amount of space.
-
- FIXED also includes the left part of the right object.
- */
- *fixed
- = (left_head_wid.is_empty () ? increment
- : /*
- Size of the head:
- */
- (left_head_wid[RIGHT]+
-
- /*
- What's sticking out of the head, eg. a flag:
- */
- (extents[LEFT][RIGHT] - left_head_wid[RIGHT]) / 2))
-
- /*
- What is sticking out on the left side of the right note:
- */
- + (extents[RIGHT].is_empty ()
- ? 0.0
- : ((- extents[RIGHT][LEFT] / 2)
-
- /*
- Add that which sticks out a lot.
- */
- + max (0.0, -extents[RIGHT][LEFT] - (base_space - increment))));
+ The main factor that determines the amount of space is the width of the
+ note head (or the rest). For example, a quarter rest gets almost 0.5 ss
+ less horizontal space than a note.
- /*
- We don't do complicated stuff: (base_space - increment) is the
- normal amount of white, which also determines the amount of
- stretch. Upon (extreme) stretching, notes with accidentals should
- stretch as much as notes without accidentals.
+ The other parts of a note column (eg. flags, accidentals, etc.) don't get
+ the full amount of space. We give them half the amount of space, but then
+ adjust things so there are no collisions.
*/
- *space = (base_space - increment) + *fixed;
+ Drul_array<Skyline> skys = Spacing_interface::skylines (me, right_col);
+ Real min_dist = max (0.0, skys[LEFT].distance (skys[RIGHT]));
+ Real min_desired_space = left_head_end + (min_dist - left_head_end) / 2;
-#if 0
- /*
- The below situation is now handled by the "sticks out a lot" case
- above. However we keep around the code for a few releases before
- we drop it.
- */
- if (!extents[RIGHT].is_empty ()
- && (Item::is_breakable (right_col)
- || right_col->original ()))
- {
- /*
- This is for the situation
+ /* if the right object sticks out a lot, include a bit of extra space.
+ But only for non-musical-columns; this shouldn't apply to accidentals */
+ if (!Paper_column::is_musical (right_col))
+ min_desired_space = max (min_desired_space,
+ left_head_end + LEFT * skys[RIGHT].max_height ());
- rest | 3/4 (eol)
+ Real ideal = base_space - increment + min_desired_space;
- Since we only take half of the right-object space above, the
- barline will bump into the notes preceding it, if the right
- thing is big. We add the rest of the extents here:
- */
+ stem_dir_correction (me, right_col, increment, &ideal, &min_desired_space);
- *space += -extents[RIGHT][LEFT] / 2;
- *fixed += -extents[RIGHT][LEFT] / 2;
- }
-#endif
-
- stem_dir_correction (me, right_col, increment, space, fixed);
+ Spring ret (ideal, min_dist);
+ ret.set_inverse_compress_strength (max (0.0, ideal - max (min_dist, min_desired_space)));
+ ret.set_inverse_stretch_strength (max (0.1, base_space - increment));
+ return ret;
}
-Item *
-Note_spacing::left_column (Grob *me)
-{
- if (!me->is_live ())
- return 0;
-
- return dynamic_cast<Item *> (me)->get_column ();
-}
-
-/*
- Compute the column of the right-items. This is a big function,
- since RIGHT-ITEMS may span more columns (eg. if a clef if inserted,
- this will add a new columns to RIGHT-ITEMS. Here we look at the
- columns, and return the left-most. If there are multiple columns, we
- prune RIGHT-ITEMS.
-*/
-Item *
-Note_spacing::right_column (Grob *me)
-{
- if (!me->is_live ())
- return 0;
-
- Grob_array *a = unsmob_grob_array (me->get_object ("right-items"));
- Item *mincol = 0;
- int min_rank = INT_MAX;
- bool prune = false;
- for (int i = 0; a && i < a->size (); i++)
- {
- Item *ri = a->item (i);
- Item *col = ri->get_column ();
-
- int rank = Paper_column::get_rank (col);
-
- if (rank < min_rank)
- {
- min_rank = rank;
- if (mincol)
- prune = true;
-
- mincol = col;
- }
- }
-
- if (prune && a)
- {
- Link_array<Grob> &right = a->array_reference ();
- for (int i = right.size (); i--;)
- {
- if (dynamic_cast<Item *> (right[i])->get_column () != mincol)
- right.del (i);
- }
- }
-
- if (!mincol)
- return 0;
-
- return mincol;
-}
/**
Correct for optical illusions. See [Wanske] p. 138. The combination
up-stem + down-stem should get extra space, the combination
down-stem + up-stem less.
- TODO: have to check wether the stems are in the same staff.
+ TODO: have to check whether the stems are in the same staff.
*/
void
Note_spacing::stem_dir_correction (Grob *me, Item *rcolumn,
do
{
- Link_array<Grob> const &items (ly_scm2link_array (props [d]));
- for (int i = 0; i < items.size (); i++)
+ vector<Grob*> const &items (ly_scm2link_array (props [d]));
+ for (vsize i = 0; i < items.size (); i++)
{
Item *it = dynamic_cast<Item *> (items[i]);
stems_drul[d] = stem;
beams_drul[d] = Stem::get_beam (stem);
- Direction sd = get_grob_direction (stem);
- if (stem_dirs[d] && stem_dirs[d] != sd)
+ Direction stem_dir = get_grob_direction (stem);
+ if (stem_dirs[d] && stem_dirs[d] != stem_dir)
{
correct_stem_dirs = false;
continue;
}
- stem_dirs[d] = sd;
+ stem_dirs[d] = stem_dir;
/*
Correction doesn't seem appropriate when there is a large flag
correct_stem_dirs = false;
Interval hp = Stem::head_positions (stem);
- if (!hp.is_empty ())
+ if (correct_stem_dirs
+ && !hp.is_empty ())
{
- Real chord_start = hp[sd];
- Real stem_end = Stem::stem_end_position (stem);
+ Real chord_start = hp[stem_dir];
- stem_posns[d] = Interval (min (chord_start, stem_end), max (chord_start, stem_end));
+ /*
+ can't look at stem-end-position, since that triggers
+ beam slope computations.
+ */
+ Real stem_end = hp[stem_dir] +
+ stem_dir * robust_scm2double (stem->get_property ("length"), 7);
+
+ stem_posns[d] = Interval (min (chord_start, stem_end),
+ max (chord_start, stem_end));
head_posns[d].unite (hp);
}
}
{
stem_dirs[RIGHT] = -stem_dirs[LEFT];
stem_posns[RIGHT] = bar_yextent;
+ stem_posns[RIGHT] *= 2;
}
if (correct_stem_dirs && stem_dirs[LEFT] * stem_dirs[RIGHT] == -1)
if (!head_extent.is_empty ())
note_head_width = head_extent[RIGHT];
- if (st)
- {
- Real thick = Stem::thickness (st);
-
- note_head_width -= thick;
- }
+ note_head_width -= Stem::thickness (st);
}
correction = note_head_width * stem_dirs[LEFT];
*/
}
-ADD_INTERFACE (Note_spacing, "note-spacing-interface",
+ADD_INTERFACE (Note_spacing,
"This object calculates spacing wishes for individual voices.",
- "left-items right-items stem-spacing-correction same-direction-correction knee-spacing-correction");
+
+
+ "knee-spacing-correction "
+ "left-items "
+ "right-items "
+ "same-direction-correction "
+ "stem-spacing-correction "
+
+ );
projects / lilypond.git / blobdiff