source file of the GNU LilyPond music typesetter
- (C) 2000 Juergen Reuter <reuterj@ira.uka.de>
+ (C) 2000, 2002 Juergen Reuter <reuter@ipd.uka.de>
*/
/* TODO:
- - merge create_ledger_line () and Note_head::create_ledger_line()
-
+ - merge create_ledger_line () and Note_head::create_ledger_line ()
- - rewrite create_ledger_line() to support short and thin ledger lines
+ - rewrite create_ledger_line () to support short and thin ledger lines
- do not show if a clef change immediately follows in the next line
- - make custos direction control configurable
-
- decide: do or do not print custos if the next line starts with a rest
*/
#include <stdio.h>
+#include "direction.hh"
#include "staff-symbol-referencer.hh"
#include "custos.hh"
#include "molecule.hh"
-#include "lookup.hh"
#include "debug.hh"
#include "note-head.hh"
#include "item.hh"
#include "font-interface.hh"
+#include "math.h" // rint
/*
This function is a patched and hopefully much more understandable
- rewrite of Note_head::ledger_line(). It still has some
+ rewrite of Note_head::ledger_line (). It still has some
bugs/limitations:
*
- (1) The term thick/2 probably should be thick*2 (probably a bug,
+ (1) The term thick/2 probably should be thick*2 (probably a bug,
see the code below).
*
- (2) The minimal width of the resulting ledger line equals the width
+ (2) The minimal width of the resulting ledger line equals the width
of the noteheads-ledgerending symbol (a limitation):
*
- (---- left ledger ending
+ (---- left ledger ending
----) right ledger ending
- (---) resulting ledger line (just ok)
+ (---) resulting ledger line (just ok)
*
If x_extent ("xwid" in Note_head) is less than the width of the
ledger ending, the width of the total ledger line is even *greater*
than the width of a ledger ending (I would call this a bug). In
- the below code, the condition "if (x_extent.length() >
- slice_x_extent.length())" avoids outputting the left ending in such
+ the below code, the condition "if (x_extent.length () >
+ slice_x_extent.length ())" avoids outputting the left ending in such
cases (rather a silly workaround, but better than nothing).
*
- (---- left ledger ending
+ (---- left ledger ending
----) right ledger ending
- (-) desired ledger line
+ (-) desired ledger line
------- resulting ledger line (too long)
----) resulting ledger line with additional "if" (still too long)
*
The algorithm works properly only for a desired ledger line width
greater than the width of the ledger ending:
*
- (---- left ledger ending
+ (---- left ledger ending
----) right ledger ending
- (------) desired ledger line
- (------) resulting ledger line (ok)
+ (------) desired ledger line
+ (------) resulting ledger line (ok)
*
* (3) The thickness of the ledger line is fixed (limitation).
*/
-Molecule create_ledger_line (Interval x_extent, Score_element *me)
+Molecule
+Custos::create_ledger_line (Interval x_extent, Grob *me)
{
Molecule line;
Molecule slice = Font_interface::get_default_font (me)->find_by_name ("noteheads-ledgerending");
- Interval slice_x_extent = slice.extent(X_AXIS);
- Interval slice_y_extent = slice.extent(Y_AXIS);
+ Interval slice_x_extent = slice.extent (X_AXIS);
+ Interval slice_y_extent = slice.extent (Y_AXIS);
// Create left ending of ledger line.
Molecule left_ending = slice;
left_ending.translate_axis (x_extent[LEFT] - slice_x_extent[LEFT], X_AXIS);
- if (x_extent.length() > slice_x_extent.length())
+ if (x_extent.length () > slice_x_extent.length ())
line.add_molecule (left_ending);
// Create right ending of ledger line.
// Fill out space between left and right ending of ledger line by
// lining up a series of slices in a row between them.
Molecule fill_out_slice = left_ending;
- Real thick = slice_y_extent.length();
+ Real thick = slice_y_extent.length ();
Real delta_x = slice_x_extent.length () - thick;
Real xpos = x_extent [LEFT] + 2*delta_x + thick/2; // TODO: check: thick*2?
while (xpos <= x_extent[RIGHT])
return line;
}
-void add_streepjes(Score_element* me,
+void
+Custos::add_streepjes (Grob* me,
int pos,
int interspaces,
Molecule* custos_p_)
Real inter_f = Staff_symbol_referencer::staff_space (me)/2;
int streepjes_i = abs (pos) < interspaces
? 0
- : (abs(pos) - interspaces) /2;
+ : (abs (pos) - interspaces) /2;
if (streepjes_i)
{
Direction dir = (Direction)sign (pos);
}
}
-MAKE_SCHEME_CALLBACK(Custos,brew_molecule,1);
+MAKE_SCHEME_CALLBACK (Custos,brew_molecule,1);
SCM
Custos::brew_molecule (SCM smob)
{
- Item *me = (Item *)unsmob_element (smob);
- SCM scm_style = me->get_elt_property ("style");
+ Item *me = (Item *)unsmob_grob (smob);
+ SCM scm_style = me->get_grob_property ("style");
- if (gh_string_p (scm_style))
+ if (gh_symbol_p (scm_style))
{
- String style = ly_scm2string (scm_style);
-
- String idx = "custodes-";
- int interspaces = Staff_symbol_referencer::line_count (me)-1;
+ String style = ly_scm2string (scm_symbol_to_string (scm_style));
+
+ /*
+ DOCME:
+
+ Why would we want it differently? What's the meaning of adjust ?
+ */
+ bool adjust =
+ to_boolean (me->get_grob_property ("adjust-if-on-staffline"));
+
+ String idx = "custodes-" + style + "-";
+
+ int neutral_pos;
+ SCM ntr_pos = me->get_grob_property ("neutral-position");
+ if (gh_number_p (ntr_pos))
+ neutral_pos = gh_scm2int (ntr_pos);
+ else
+ neutral_pos = 0;
+
+ Direction neutral_direction =
+ to_dir (me->get_grob_property ("neutral-direction"));
+
+ int pos = (int)rint (Staff_symbol_referencer::position_f (me));
+ int sz = Staff_symbol_referencer::line_count (me)-1;
+
+ if (pos < neutral_pos)
+ idx += "u";
+ else if (pos > neutral_pos)
+ idx += "d";
+ else if (neutral_direction == UP)
+ idx += "u";
+ else if (neutral_direction == DOWN)
+ idx += "d";
+ else // auto direction; not yet supported -> use "d"
+ idx += "d";
+
+ if (adjust)
+ {
+ idx += (((pos ^ sz) & 0x1) == 0) ? "1" : "0";
+ }
+ else
+ {
+ idx += "2";
+ }
- Real pos = Staff_symbol_referencer::position_f (me);
-
- if (pos > (interspaces/2 + 1)) // TODO: make this rule configurable
- idx += "r";
- idx += style;
Molecule molecule
= Font_interface::get_default_font (me)->find_by_name (idx);
- if (molecule.empty_b())
+ if (molecule.empty_b ())
{
- String message = "unknown custos style: `" + style + "'";
- warning(_ (message.ch_C()));
+ String message = "no such custos: `" + idx + "'";
+ warning (_ (message.ch_C ()));
return SCM_EOL;
}
else
{
- add_streepjes(me, (int)pos, interspaces, &molecule);
- return molecule.smobbed_copy();
+ add_streepjes (me, (int)pos, sz, &molecule);
+ return molecule.smobbed_copy ();
}
}
else
}
bool
-Custos::has_interface (Score_element*m)
+Custos::has_interface (Grob*m)
{
return m && m->has_interface (ly_symbol2scm ("custos-interface"));
}
+
+
+ADD_INTERFACE (Custos, "custos-interface",
+ "A custos is a staff context symbol that appears at the end of a
+ staff line with monophonic musical contents (i.e. with a single
+ voice). It anticipates the pitch of the first note of the following
+ line and thus helps the player or singer to manage line breaks
+ during performance, thus enhancing readability of a score.
+
+ Custodes were frequently used in music notation until the 16th
+ century. There were different appearences for different notation
+ styles. Nowadays, they have survived only in special forms of
+ musical notation such as via the editio vaticana dating back to the
+ beginning of the 20th century.
+
+[TODO: add to glossary]",
+ "style adjust-if-on-staffline neutral-position");
projects / lilypond.git / blobdiff