source file of the GNU LilyPond music typesetter
- (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include <math.h>
#include <ctype.h>
+#include "staff-symbol.hh"
#include "misc.hh"
#include "dots.hh"
#include "note-head.hh"
int pos,
int interspaces,
Interval x_extent,
- bool take_space)
+ Real left_shorten,
+ bool take_space)
{
+ Grob *staff = Staff_symbol_referencer::get_staff_symbol (me);
Real inter_f = Staff_symbol_referencer::staff_space (me)/2;
- int lines_i = abs (pos) < interspaces
+ int line_count = (abs (pos) < interspaces)
? 0
: (abs (pos) - interspaces) / 2;
Molecule molecule = Molecule();
- if (lines_i)
+
+ if (line_count)
{
Real ledgerlinethickness =
- (me->get_paper ()->get_var ("ledgerlinethickness"));
+ Staff_symbol::get_ledger_line_thickness (staff);
Real blotdiameter = ledgerlinethickness;
- // (me->get_paper ()->get_var ("blotdiameter"));
Interval y_extent =
Interval (-0.5*(ledgerlinethickness),
+0.5*(ledgerlinethickness));
- Box ledger_line (x_extent, y_extent);
-
Molecule proto_ledger_line =
- Lookup::roundfilledbox (ledger_line, blotdiameter);
-
- if (!take_space)
- proto_ledger_line.set_empty (true);
+ Lookup::round_filled_box (Box (x_extent, y_extent), blotdiameter);
+
+ x_extent[LEFT] += left_shorten;
+ Molecule proto_first_line =
+ Lookup::round_filled_box (Box (x_extent, y_extent), blotdiameter);
+ if (!take_space)
+ {
+ proto_ledger_line.set_empty (true);
+ proto_first_line.set_empty (true);
+ }
+
Direction dir = (Direction)sign (pos);
Real offs = (Staff_symbol_referencer::on_staffline (me, pos))
? 0.0
: -dir * inter_f;
- for (int i = 0; i < lines_i; i++)
+
+ for (int i = 0; i < line_count; i++)
{
- Molecule ledger_line (proto_ledger_line);
+ Molecule ledger_line ((i == 0)
+ ? proto_first_line
+ : proto_ledger_line
+ );
ledger_line.translate_axis (-dir * inter_f * i * 2 + offs, Y_AXIS);
molecule.add_molecule (ledger_line);
}
}
Molecule
-internal_brew_molecule (Grob *me, bool ledger_take_space)
+internal_brew_molecule (Grob *me, bool with_ledgers)
{
SCM style = me->get_grob_property ("style");
if (!gh_symbol_p (style))
Font_metric * fm = Font_interface::get_default_font (me);
Molecule out = fm->find_by_name (font_char);
- if (out.empty_b())
+ if (out.is_empty ())
{
me->warning (_f ("note head `%s' not found", font_char.to_str0 ()));
}
int interspaces = Staff_symbol_referencer::line_count (me)-1;
int pos = (int)rint (Staff_symbol_referencer::get_position (me));
- if (abs (pos) - interspaces > 1)
+ if (with_ledgers && interspaces >= 0
+ && abs (pos) - interspaces > 1)
{
- Interval hd = out.extent (X_AXIS);
- Real left_ledger_protusion = hd.length ()/4;
- Real right_ledger_protusion = left_ledger_protusion;
+ Interval ledger_size = out.extent (X_AXIS);
+ ledger_size.widen ( ledger_size.length ()/4);
- if (unsmob_grob(me->get_grob_property ("accidental-grob")))
+ Real left_shorten =0.0;
+ if (Grob * g = unsmob_grob(me->get_grob_property ("accidental-grob")))
{
/*
make a little room for accidentals.
TODO: this will look silly if a chord has ledger lines,
and only the bottom note has an accidental.
*/
-
- left_ledger_protusion *= 0.66;
- right_ledger_protusion *= 0.9;
+
+ Grob *common = g->common_refpoint (me, X_AXIS);
+ Real d =
+ (me->extent (common, X_AXIS)[LEFT]
+ +g->extent (common, X_AXIS)[RIGHT]) /2;
+
+ left_shorten = (-ledger_size[LEFT] + d) >? 0 ;
+
+ /*
+ TODO: shorten 2 ledger lines for the case natural +
+ downstem.
+ */
}
- Interval l_extents = Interval (hd[LEFT] - left_ledger_protusion,
- hd[RIGHT] + right_ledger_protusion);
out.add_molecule (Note_head::brew_ledger_lines (me, pos, interspaces,
- l_extents,
- ledger_take_space));
+ ledger_size,
+ left_shorten,
+ false));
}
return out;
}
/*
ledgers don't take space. See top of file.
*/
- return internal_brew_molecule (me, false).smobbed_copy ();
+ return internal_brew_molecule (me, true).smobbed_copy ();
}
/*
Interval
Note_head::head_extent (Grob *me, Axis a)
{
- Molecule * mol = me->get_molecule();
- return mol ? mol ->extent (a) : Interval(0,0);
+ SCM brewer = me->get_grob_property ("molecule-callback");
+ if (brewer == Note_head::brew_molecule_proc)
+ {
+ Molecule mol = internal_brew_molecule (me, false);
+
+ if (!mol.is_empty ())
+ return mol.extent (a);
+ }
+ else
+ {
+ Molecule * mol = me->get_molecule ();
+ if (mol)
+ return mol->extent (a) ;
+ }
+
+ return Interval (0,0);
}
+/*
+ This is necessary to prevent a cyclic dependency: the appearance of
+ the ledgers depends on positioning, so the Grob::get_molecule() can
+ not be used for determining the note head extent.
+
+ */
+MAKE_SCHEME_CALLBACK (Note_head,extent,2);
+SCM
+Note_head::extent (SCM smob, SCM axis)
+{
+ Grob *me = unsmob_grob (smob);
+ return ly_interval2scm (head_extent (me, (Axis) gh_scm2int (axis)));
+}
MAKE_SCHEME_CALLBACK (Note_head,brew_ez_molecule,1);
-
SCM
Note_head::brew_ez_molecule (SCM smob)
{
if (abs (pos) - interspaces > 1)
{
Interval hd = m.extent (X_AXIS);
- Real hw = hd.length ()/4;
- Interval extent = Interval (hd[LEFT] - hw, hd[RIGHT] + hw);
- m.add_molecule (brew_ledger_lines (me, pos, interspaces, extent, false));
+ hd.widen ( hd.length ()/4);
+ m.add_molecule (brew_ledger_lines (me, pos, interspaces, hd, 0, false));
}
return m.smobbed_copy ();
Real
Note_head::stem_attachment_coordinate (Grob *me, Axis a)
{
- SCM v = me->get_grob_property ("stem-attachment-function");
+ SCM brewer = me->get_grob_property ("molecule-callback");
+ Font_metric * fm = Font_interface::get_default_font (me);
+
+ if (brewer == Note_head::brew_molecule_proc)
+ {
+ SCM style = me->get_grob_property ("style");
+ if (!gh_symbol_p (style))
+ {
+ return 0.0;
+ }
+
+ SCM log = gh_int2scm (Note_head::get_balltype (me));
+ SCM proc = me->get_grob_property ("glyph-name-procedure");
+ SCM scm_font_char = scm_call_2 (proc, log, style);
+ String font_char = "noteheads-" + ly_scm2string (scm_font_char);
+ int k = fm->name_to_index (font_char) ;
+
+ if (k >= 0)
+ {
+ Box b = fm->get_indexed_char (k);
+ Offset wxwy = fm->get_indexed_wxwy (k);
+ Interval v = b[a];
+ if (!v.is_empty ())
+ return 2 * (wxwy[a] - v.center()) / v.length ();
+ }
+ }
+
+ /*
+ Fallback
+ */
+ SCM v = me->get_grob_property ("stem-attachment-function");
if (!gh_procedure_p (v))
return 0.0;
-
- SCM st = me->get_grob_property ("style");
- SCM log = gh_int2scm (get_balltype (me));
- SCM result = gh_apply (v, scm_list_n (st, log, SCM_UNDEFINED));
-
+
+ SCM result = scm_call_2 (v, me->self_scm(), gh_int2scm (a));
if (!gh_pair_p (result))
return 0.0;
result = (a == X_AXIS) ? ly_car (result) : ly_cdr (result);
- return gh_number_p (result) ? gh_scm2double (result) : 0.0;
+ return robust_scm2double (result,0);
}
int