source file of the GNU LilyPond music typesetter
- (c) 1997--2000 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"
-#include "debug.hh"
-#include "lookup.hh"
+#include "warn.hh"
+#include "font-interface.hh"
#include "molecule.hh"
-#include "musical-request.hh"
-#include "dimension-cache.hh"
+#include "event.hh"
+#include "rhythmic-head.hh"
#include "staff-symbol-referencer.hh"
+#include "lookup.hh"
+#include "paper-def.hh"
+
+/*
+ Note_head contains the code for printing note heads.
+
+ Ledger lines:
+
+ It also contains the ledger lines, for historical reasons. Ledger
+ lines are somewhat of a PITA. In some cases, they take up no space, in
+ some cases they don't:
+ DO take space:
+ - when ledgered notes are juxtaposed: there should be some white
+ space between the ledger lines.
+
+ - when accidentals are near: the accidentals should not be on the
+ ledger lines
+
+ [both tips by Heinz Stolba from Universal Edition].
+
+ DO NOT take space into account:
+
+ - for basically everything else, e.g. swapping ledgered notes on
+ clustered chords, spacing between ledgered and unledgered notes.
+
+ TODO: fix this. It is not feasible to have a special grob for
+ ledgers, since you basically don't know if there will be ledgers,
+ unless you know at interpretation phase already 1. the Y-position,
+ 2. the number of staff lines. It's not yet specced when both pieces
+ of information are there, so for now, it is probably better to build
+ special support for ledgers into the accidental and separation-item
+ code.
+
+ (Besides a separate ledger seems overkill. For what else would
+ it be useful?)
+
+*/
/*
- build a ledger line for small pieces.
+ TODO: ledger lines are also a property of the staff. Maybe move them
+ to there?
*/
Molecule
-Note_head::ledger_line (Interval xwid) const
+Note_head::brew_ledger_lines (Grob *me,
+ int pos,
+ int interspaces,
+ Interval x_extent,
+ Real left_shorten,
+ bool take_space)
{
- Drul_array<Molecule> endings;
- endings[LEFT] = lookup_l()->afm_find ("noteheads-ledgerending");
- Molecule *e = &endings[LEFT];
- endings[RIGHT] = *e;
-
- Real thick = e->dim_[Y_AXIS].length();
- Real len = e->dim_[X_AXIS].length () - thick;
+ Grob *staff = Staff_symbol_referencer::get_staff_symbol (me);
+ Real inter_f = Staff_symbol_referencer::staff_space (me)/2;
+ int line_count = (abs (pos) < interspaces)
+ ? 0
+ : (abs (pos) - interspaces) / 2;
+ Molecule molecule = Molecule();
+
+
+ if (line_count)
+ {
+ Real ledgerlinethickness =
+ Staff_symbol::get_ledger_line_thickness (staff);
+ Real blotdiameter = ledgerlinethickness;
+ Interval y_extent =
+ Interval (-0.5*(ledgerlinethickness),
+ +0.5*(ledgerlinethickness));
+ Molecule proto_ledger_line =
+ 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 < line_count; i++)
+ {
+ 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 total;
- Direction d = LEFT;
- do {
- endings[d].translate_axis (xwid[d] - endings[d].dim_[X_AXIS][d], X_AXIS);
- total.add_molecule (endings[d]);
- } while ((flip(&d)) != LEFT);
+ return molecule;
+}
- Real xpos = xwid [LEFT] + len;
+Molecule
+internal_brew_molecule (Grob *me, bool with_ledgers)
+{
+ SCM style = me->get_grob_property ("style");
+ if (!gh_symbol_p (style))
+ {
+ return Molecule ();
+ }
- while (xpos + len + thick /2 <= xwid[RIGHT])
+ 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);
+
+ Font_metric * fm = Font_interface::get_default_font (me);
+ Molecule out = fm->find_by_name (font_char);
+ if (out.is_empty ())
{
- e->translate_axis (len, X_AXIS);
- total.add_molecule (*e);
- xpos += len;
+ me->warning (_f ("note head `%s' not found", font_char.to_str0 ()));
}
- return total;
+ int interspaces = Staff_symbol_referencer::line_count (me)-1;
+ int pos = (int)rint (Staff_symbol_referencer::get_position (me));
+ if (with_ledgers && interspaces >= 0
+ && abs (pos) - interspaces > 1)
+ {
+ Interval ledger_size = out.extent (X_AXIS);
+ ledger_size.widen ( ledger_size.length ()/4);
+
+ 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.
+ */
+
+ 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.
+ */
+ }
+
+ out.add_molecule (Note_head::brew_ledger_lines (me, pos, interspaces,
+ ledger_size,
+ left_shorten,
+ false));
+ }
+ return out;
}
-void
-Note_head::before_line_breaking ()
+MAKE_SCHEME_CALLBACK (Note_head,brew_molecule,1);
+SCM
+Note_head::brew_molecule (SCM smob)
{
- // 8 ball looks the same as 4 ball:
-
- if (balltype_i () > 2)
- set_elt_property ("duration-log", gh_int2scm (2));
+ Grob *me = unsmob_grob (smob);
- if (Dots *d = dots_l ())
- { // move into Rhythmic_head?
- Staff_symbol_referencer_interface si (d);
- Staff_symbol_referencer_interface me (this);
-
- si.set_position(int (me.position_f ()));
- }
+ /*
+ ledgers don't take space. See top of file.
+ */
+ return internal_brew_molecule (me, true).smobbed_copy ();
}
+/*
+ Compute the width the head without ledgers.
+ -- there used to be some code from the time that ledgers
+ did take space. Nowadays, we can simply take the standard extent.
+ */
+Interval
+Note_head::head_extent (Grob *me, Axis a)
+{
+ 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)));
+}
-Molecule
-Note_head::do_brew_molecule() const
+MAKE_SCHEME_CALLBACK (Note_head,brew_ez_molecule,1);
+SCM
+Note_head::brew_ez_molecule (SCM smob)
{
- Staff_symbol_referencer_interface si (this);
+ Grob *me = unsmob_grob (smob);
+ int l = Note_head::get_balltype (me);
+
+ int b = (l >= 2);
+
+ SCM cause = me->get_grob_property ("cause");
+ SCM spitch = unsmob_music (cause)->get_mus_property ("pitch");
+ Pitch* pit = unsmob_pitch (spitch);
+
+ char s[2] = "a";
+ s[0] = (pit->get_notename () + 2)%7 + 'a';
+ s[0] = toupper (s[0]);
- Real inter_f = si.staff_space ()/2;
- int sz = si.line_count ()-1;
- Real p = si.position_f ();
- int streepjes_i = abs (p) < sz
- ? 0
- : (abs((int)p) - sz) /2;
+ SCM charstr = scm_makfrom0str (s);
+
+ SCM at = scm_list_n (ly_symbol2scm ("ez-ball"),
+ charstr,
+ gh_int2scm (b),
+ gh_int2scm (1-b),
+ SCM_UNDEFINED);
+ Box bx (Interval (0, 1.0), Interval (-0.5, 0.5));
+ Molecule m (bx, at);
- SCM style = get_elt_property ("style");
- if (style == SCM_UNDEFINED)
+ int pos = (int)rint (Staff_symbol_referencer::get_position (me));
+ int interspaces = Staff_symbol_referencer::line_count (me)-1;
+ if (abs (pos) - interspaces > 1)
{
- style = ly_str02scm("");
+ Interval hd = m.extent (X_AXIS);
+ hd.widen ( hd.length ()/4);
+ m.add_molecule (brew_ledger_lines (me, pos, interspaces, hd, 0, false));
}
-
- Molecule out = lookup_l()->afm_find (String ("noteheads-") +
- ly_scm2string (scm_eval (gh_list (ly_symbol2scm("noteheadsymbol"),
- gh_int2scm(balltype_i ()),
- style,
- SCM_UNDEFINED))));
- Box ledgerless = out.dim_;
+ return m.smobbed_copy ();
+}
- if (streepjes_i)
+
+Real
+Note_head::stem_attachment_coordinate (Grob *me, Axis a)
+{
+ SCM brewer = me->get_grob_property ("molecule-callback");
+ Font_metric * fm = Font_interface::get_default_font (me);
+
+ if (brewer == Note_head::brew_molecule_proc)
{
- Direction dir = (Direction)sign (p);
- Interval hd = out.dim_[X_AXIS];
- Real hw = hd.length ()/4;
-
- Molecule ledger (ledger_line (Interval (hd[LEFT] - hw,
- hd[RIGHT] + hw)));
-
- int parity = abs(int (p)) % 2;
+ SCM style = me->get_grob_property ("style");
+ if (!gh_symbol_p (style))
+ {
+ return 0.0;
+ }
- for (int i=0; i < streepjes_i; i++)
+ 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)
{
- Molecule s (ledger);
- s.translate_axis (-dir * inter_f * (i*2 + parity),
- Y_AXIS);
- out.add_molecule (s);
+ 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 result = scm_call_2 (v, me->self_scm(), gh_int2scm (a));
+ if (!gh_pair_p (result))
+ return 0.0;
- out.dim_ = ledgerless;
- return out;
+ result = (a == X_AXIS) ? ly_car (result) : ly_cdr (result);
+
+ return robust_scm2double (result,0);
}
+int
+Note_head::get_balltype (Grob*me)
+{
+ SCM s = me->get_grob_property ("duration-log");
+ return gh_number_p (s) ? gh_scm2int (s) <? 2 : 0;
+}
+
+ADD_INTERFACE (Note_head,"note-head-interface",
+ "Note head",
+ "glyph-name-procedure accidental-grob style stem-attachment-function");
+
projects / lilypond.git / blobdiff