-/*
+/*
ledger-line-spanner.cc -- implement Ledger_line_spanner
-
+
source file of the GNU LilyPond music typesetter
-
+
(c) 2004--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
-
*/
#include <map>
-#include <set>
#include "item.hh"
-#include "note-head.hh"
-#include "staff-symbol-referencer.hh"
-#include "staff-symbol.hh"
-#include "lookup.hh"
-#include "spanner.hh"
-#include "group-interface.hh"
+#include "note-head.hh"
+#include "staff-symbol-referencer.hh"
+#include "staff-symbol.hh"
+#include "lookup.hh"
+#include "spanner.hh"
+#include "group-interface.hh"
#include "paper-column.hh"
struct Ledger_line_spanner
{
- DECLARE_SCHEME_CALLBACK (print, (SCM ));
- DECLARE_SCHEME_CALLBACK (set_spacing_rods, (SCM ));
+ DECLARE_SCHEME_CALLBACK (print, (SCM));
+ DECLARE_SCHEME_CALLBACK (set_spacing_rods, (SCM));
static Stencil brew_ledger_lines (Grob *me,
int pos,
int interspaces,
Interval x_extent,
Real left_shorten);
- static bool has_interface (Grob*);
+ static bool has_interface (Grob *);
};
-
Stencil
Ledger_line_spanner::brew_ledger_lines (Grob *staff,
int pos,
if (line_count)
{
Real blotdiameter = ledgerlinethickness;
- Interval y_extent =
- Interval (-0.5*(ledgerlinethickness),
- +0.5*(ledgerlinethickness));
- Stencil proto_ledger_line =
- Lookup::round_filled_box (Box (x_extent, y_extent), blotdiameter);
+ Interval y_extent
+ = Interval (-0.5* (ledgerlinethickness),
+ +0.5* (ledgerlinethickness));
+ Stencil proto_ledger_line
+ = Lookup::round_filled_box (Box (x_extent, y_extent), blotdiameter);
x_extent[LEFT] += left_shorten;
- Stencil proto_first_line =
- Lookup::round_filled_box (Box (x_extent, y_extent), blotdiameter);
+ Stencil proto_first_line
+ = Lookup::round_filled_box (Box (x_extent, y_extent), blotdiameter);
Direction dir = (Direction)sign (pos);
Real offs = (Staff_symbol_referencer::on_staffline (staff, pos))
- ? 0.0
- : -dir * halfspace;
-
+ ? 0.0
+ : -dir * halfspace;
offs += pos * halfspace;
for (int i = 0; i < line_count; i++)
- {
- Stencil ledger_line ((i == 0)
- ? proto_first_line
- : proto_ledger_line
- );
- ledger_line.translate_axis (-dir * halfspace * i * 2 + offs, Y_AXIS);
- stencil.add_stencil (ledger_line);
- }
+ {
+ Stencil ledger_line ((i == 0)
+ ? proto_first_line
+ : proto_ledger_line);
+ ledger_line.translate_axis (-dir * halfspace * i * 2 + offs, Y_AXIS);
+ stencil.add_stencil (ledger_line);
+ }
}
return stencil;
}
-
-typedef std::map<int, Drul_array<Interval> > Head_extents_map;
-typedef std::map<int, Grob*> Column_map;
-
MAKE_SCHEME_CALLBACK (Ledger_line_spanner, set_spacing_rods, 1);
SCM
Ledger_line_spanner::set_spacing_rods (SCM smob)
{
- Spanner *me = dynamic_cast<Spanner*> (unsmob_grob (smob));
+ Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
// find size of note heads.
- Grob * staff = Staff_symbol_referencer::get_staff_symbol (me);
+ Grob *staff = Staff_symbol_referencer::get_staff_symbol (me);
if (!staff)
return SCM_EOL;
- Link_array<Grob> heads (Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-heads"));
-
- if (heads.is_empty ())
- return SCM_EOL;
-
+ SCM heads = me->get_property ("note-heads");
+
+
Real min_length_fraction
= robust_scm2double (me->get_property ("minimum-length-fraction"), 0.15);
-
- Head_extents_map head_extents;
- Column_map columns;
-
- int interspaces = Staff_symbol::line_count (staff)-1;
- for (int i = heads.size (); i--; )
- {
- Item *h = dynamic_cast<Item*> (heads[i]);
-
- int pos = Staff_symbol_referencer::get_rounded_position (h);
- if (pos
- && abs (pos) > interspaces)
- {
- Grob *column = h->get_column ();
- int rank = Paper_column::get_rank (column);
- Interval head_extent = h->extent (column, X_AXIS);
- Direction vdir = Direction (sign (pos));
- if (!vdir)
- continue;
-
- Interval prev_extent;
- Head_extents_map::iterator j = head_extents.find (rank);
- if (j != head_extents.end ())
- prev_extent = (*j).second[vdir];
- else
- columns[rank] = column;
-
- prev_extent.unite (head_extent);
- head_extents[rank][vdir] = prev_extent;
- }
- }
+ Drul_array<Interval> current_extents;
+ Drul_array<Interval> previous_extents;
+ Item *previous_column = 0;
+ Item *current_column = 0;
- for (Column_map::const_iterator c (columns.begin()); c != columns.end(); c++)
+ /*
+ Run through heads using a loop. Since Legder_line_spanner can
+ contain a lot of noteheads, we don't use an STL map or set.
+ */
+ int interspaces = Staff_symbol::line_count (staff) - 1;
+ for (SCM hp = heads; scm_is_pair (hp); hp = scm_cdr (hp))
{
- Grob *column = (*c).second;
- int rank = (*c).first;
-
- int next_rank = rank + 2;
+ Item *h = dynamic_cast<Item *> (unsmob_grob (scm_car (hp)));
- if (head_extents.find (next_rank) != head_extents.end ())
+ int pos = Staff_symbol_referencer::get_rounded_position (h);
+ if (abs (pos) <= interspaces)
+ continue;
+
+ Item *column = h->get_column ();
+ if (current_column != column)
{
- Drul_array<Interval> extents_left = head_extents[rank];
- Drul_array<Interval> extents_right = head_extents[next_rank];
-
- Direction d = DOWN;
+ Direction d = UP;
do
{
- if (!extents_right[d].is_empty () && !extents_right[d].is_empty ())
+ if (!current_extents[d].is_empty ()
+ && !previous_extents[d].is_empty ())
{
- Real l1 = extents_right[d].length() * min_length_fraction;
- Real l2 = extents_left[d].length() * min_length_fraction;
+ Real total_head_length = previous_extents[d].length ()
+ + current_extents[d].length ();
Rod rod;
- rod.distance_ = l1 + l2 + (l1+ l2)/2.0
- + extents_left[d][RIGHT]
- - extents_right[d][LEFT];
-
- rod.item_drul_[LEFT] = dynamic_cast<Item*> (column);
- rod.item_drul_[RIGHT] = dynamic_cast<Item*> (columns[next_rank]);
+ rod.distance_ = total_head_length
+ * (3/2 * min_length_fraction)
+ /*
+ we go from right to left.
+ */
+ - previous_extents[d][LEFT]
+ + current_extents[d][RIGHT];
+
+ rod.item_drul_[LEFT] = current_column;
+ rod.item_drul_[RIGHT] = previous_column;
rod.add_to_cols ();
}
}
while (flip (&d) != DOWN);
+
+ previous_column = current_column;
+ current_column = column;
+ previous_extents = current_extents;
+
+ current_extents[DOWN].set_empty();
+ current_extents[UP].set_empty();
}
- }
+
+
+ Interval head_extent = h->extent (column, X_AXIS);
+ Direction vdir = Direction (sign (pos));
+ if (!vdir)
+ continue;
+ current_extents[vdir].unite (head_extent);
+ }
+
return SCM_UNSPECIFIED;
}
-
struct Ledger_request
{
Interval ledger_extent_;
Interval head_extent_;
int position_;
bool excentric_;
- Ledger_request () {
+ Ledger_request ()
+ {
ledger_extent_.set_empty ();
head_extent_.set_empty ();
position_ = 0;
}
};
-typedef std::map<int, Drul_array<Ledger_request> > Ledger_requests;
-
+typedef std::map < int, Drul_array<Ledger_request> > Ledger_requests;
/*
- TODO: ledger share a lot of info. Lots of room to optimize away common
- use of objects/variables.
- */
+ TODO: ledger share a lot of info. Lots of room to optimize away
+ common use of objects/variables.
+
+*/
MAKE_SCHEME_CALLBACK (Ledger_line_spanner, print, 1);
SCM
Ledger_line_spanner::print (SCM smob)
{
- Spanner *me = dynamic_cast<Spanner*> (unsmob_grob (smob));
- Link_array<Grob> heads (Pointer_group_interface__extract_grobs (me, (Grob*)0, "note-heads"));
+ Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
+ Link_array<Grob> heads (extract_grob_array (me, ly_symbol2scm ("note-heads")));
if (heads.is_empty ())
return SCM_EOL;
-
+
// find size of note heads.
- Grob * staff = Staff_symbol_referencer::get_staff_symbol (me);
+ Grob *staff = Staff_symbol_referencer::get_staff_symbol (me);
if (!staff)
return SCM_EOL;
-
-
+
Real length_fraction
= robust_scm2double (me->get_property ("length-fraction"), 0.25);
Stencil ledgers;
Stencil default_ledger;
- Grob * common[NO_AXES];
-
- for (int i = X_AXIS; i < NO_AXES; i++)
+ Grob *common[NO_AXES];
+
+ for (int i = X_AXIS; i < NO_AXES; i++)
{
Axis a = Axis (i);
common[a] = common_refpoint_of_array (heads, me, a);
- for (int i = heads.size (); i--; )
- if (Grob * g = unsmob_grob (me->get_property ("accidental-grob")))
+ for (int i = heads.size (); i--;)
+ if (Grob *g = unsmob_grob (me->get_property ("accidental-grob")))
common[a] = common[a]->common_refpoint (g, a);
}
- int interspaces = Staff_symbol::line_count (staff)-1;
+ int interspaces = Staff_symbol::line_count (staff) - 1;
Ledger_requests reqs;
- for (int i = heads.size (); i--; )
+ for (int i = heads.size (); i--;)
{
- Item *h = dynamic_cast<Item*> (heads[i]);
-
+ Item *h = dynamic_cast<Item *> (heads[i]);
+
int pos = Staff_symbol_referencer::get_rounded_position (h);
if (pos
&& abs (pos) > interspaces)
Direction vdir = Direction (sign (pos));
int rank = Paper_column::get_rank (h->get_column ());
-
+
reqs[rank][vdir].ledger_extent_.unite (ledger_extent);
reqs[rank][vdir].head_extent_.unite (head_extent);
- reqs[rank][vdir].position_ =
- vdir * ((vdir* reqs[rank][vdir].position_) >? (vdir *pos));
+ reqs[rank][vdir].position_
+ = vdir * ((vdir* reqs[rank][vdir].position_) >? (vdir *pos));
}
}
{
continue;
}
-
+
Direction d = DOWN;
do
{
if (abs (last->second[d].position_) > interspaces
&& abs (i->second[d].position_) > interspaces)
{
- Real center =
- (last->second[d].head_extent_[RIGHT]
- + i->second[d].head_extent_[LEFT] )/2;
+ Real center
+ = (last->second[d].head_extent_[RIGHT]
+ + i->second[d].head_extent_[LEFT]) / 2;
Direction which = LEFT;
do
Ledger_request &lr = ((which == LEFT) ? *last : *i).second[d];
// due tilt of quarter note-heads
- bool both =
- (abs (last->second[d].position_) > interspaces + 1
- && abs (i->second[d].position_) > interspaces + 1);
+ bool both
+ = (abs (last->second[d].position_) > interspaces + 1
+ && abs (i->second[d].position_) > interspaces + 1);
- Real limit = (center + (both? which * gap/2 : 0));
+ Real limit = (center + (both? which * gap / 2 : 0));
lr.ledger_extent_.elem_ref (-which)
- = which * (which * lr.ledger_extent_[-which] >? which * limit);
+ = which * (which * lr.ledger_extent_[-which] >? which * limit);
}
- while (flip (&which) != LEFT);
+ while (flip (&which) != LEFT);
}
}
- while (flip (&d) != DOWN);
+ while (flip (&d) != DOWN);
}
// create ledgers for note heads
- Real ledgerlinethickness =
- Staff_symbol::get_ledger_line_thickness (staff);
- Real halfspace = Staff_symbol::staff_space (staff)/2;
- for (int i = heads.size (); i--; )
+ Real ledgerlinethickness
+ = Staff_symbol::get_ledger_line_thickness (staff);
+ Real halfspace = Staff_symbol::staff_space (staff) / 2;
+ for (int i = heads.size (); i--;)
{
- Item *h = dynamic_cast<Item*> (heads[i]);
-
+ Item *h = dynamic_cast<Item *> (heads[i]);
+
int pos = Staff_symbol_referencer::get_rounded_position (h);
if (abs (pos) > interspaces + 1)
{
Interval ledger_size = head_size;
ledger_size.widen (ledger_size.length ()* length_fraction);
- Interval max_size = reqs[Paper_column::get_rank (h->get_column ())][Direction (sign(pos))].ledger_extent_;
+ Interval max_size = reqs[Paper_column::get_rank (h->get_column ())][Direction (sign (pos))].ledger_extent_;
ledger_size.intersect (max_size);
Real left_shorten = 0.0;
- if (Grob * g = unsmob_grob (h->get_property ("accidental-grob")))
+ if (Grob *g = unsmob_grob (h->get_property ("accidental-grob")))
{
Interval accidental_size = g->extent (common[X_AXIS], X_AXIS);
- Real d =
- linear_combination (Drul_array<Real> (accidental_size[RIGHT],
- head_size[LEFT]),
- 0.0);
+ Real d
+ = linear_combination (Drul_array<Real> (accidental_size[RIGHT],
+ head_size[LEFT]),
+ 0.0);
- left_shorten = (-ledger_size[LEFT] + d) >? 0 ;
+ left_shorten = (-ledger_size[LEFT] + d) >? 0;
/*
TODO: shorten 2 ledger lines for the case natural +
downstem.
*/
-
+
}
ledgers.add_stencil (brew_ledger_lines (staff, pos, interspaces,
ledgers.translate_axis (-me->relative_coordinate (common[X_AXIS], X_AXIS),
X_AXIS);
-
+
return ledgers.smobbed_copy ();
}
"This spanner draws the ledger lines of a staff, for note heads that stick out. ",
"note-heads thickness minimum-length-fraction length-fraction gap");
-
-struct Ledgered_interface {
- static bool has_interface (Grob*);
+struct Ledgered_interface
+{
+ static bool has_interface (Grob *);
};
ADD_INTERFACE (Ledgered_interface,
projects / lilypond.git / blobdiff