source file of the GNU LilyPond music typesetter
- (c) 2000--2002 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 2000--2006 Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "molecule.hh"
-#include "item.hh"
-#include "spanner.hh"
#include "line-spanner.hh"
-#include "paper-def.hh"
+
+
+#include "spanner.hh"
+#include "output-def.hh"
#include "paper-column.hh"
#include "staff-symbol-referencer.hh"
#include "font-interface.hh"
+#include "warn.hh"
+#include "align-interface.hh"
+#include "lookup.hh"
+#include "line-interface.hh"
+
+Stencil
+zigzag_stencil (Grob *me,
+ Offset from,
+ Offset to)
+{
+ Offset dz = to -from;
-#include <math.h>
+ Real thick = Staff_symbol_referencer::line_thickness (me);
+ thick *= robust_scm2double (me->get_property ("thickness"), 1.0); // todo: staff sym referencer?
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
-/*
- slightishly clumsy interface?
+ Real w = robust_scm2double (me->get_property ("zigzag-width"), 1) * staff_space;
+ int count = (int) ceil (dz.length () / w);
+ w = dz.length () / count;
+
+ Real l = robust_scm2double (me->get_property ("zigzag-length"), 1) * w;
+ Real h = l > w / 2 ? sqrt (l * l - w * w / 4) : 0;
+
+ Offset rotation_factor = complex_exp (Offset (0, dz.arg ()));
+
+ Offset points[3];
+ points[0] = Offset (0, -h / 2);
+ points[1] = Offset (w / 2, h / 2);
+ points[2] = Offset (w, -h / 2);
+ for (int i = 0; i < 3; i++)
+ points[i] = complex_multiply (points[i], rotation_factor);
- Make a Scheme expression for a line going from (0,0) to (dx,dy).
- */
+ Stencil squiggle (Line_interface::make_line (thick, points[0], points[1]));
+ squiggle.add_stencil (Line_interface::make_line (thick, points[1], points[2]));
-static SCM
-line_atom (Grob* me, Real thick, Real dx, Real dy)
+ Stencil total;
+ for (int i = 0; i < count; i++)
+ {
+ Stencil moved_squiggle (squiggle);
+ moved_squiggle.translate (from + Offset (i * w, 0) * rotation_factor);
+ total.add_stencil (moved_squiggle);
+ }
+
+ Box b;
+ b.add_point (Offset (0, 0));
+ b.add_point (dz);
+ b[X_AXIS].widen (thick / 2);
+ b[Y_AXIS].widen (thick / 2);
+
+ return Stencil (b, total.expr ());
+}
+
+MAKE_SCHEME_CALLBACK (Line_spanner, after_line_breaking, 1);
+SCM
+Line_spanner::after_line_breaking (SCM g)
{
- SCM type = me->get_grob_property ("type");
- Real staff_space = Staff_symbol_referencer::staff_space (me);
-
- // maybe these should be in line-thickness?
- Real length = staff_space;
- SCM s = me->get_grob_property ("dash-length");
- if (gh_number_p (s))
- length = gh_scm2double (s) * staff_space;
-
- Real period = 2 * length + thick;
- s = me->get_grob_property ("dash-period");
- if (gh_number_p (s))
- period = gh_scm2double (s) * staff_space;
-
- if (type == ly_symbol2scm ("dotted-line"))
- length = thick;
-
- if (type == ly_symbol2scm ("line"))
- length = period + thick;
-
- Real on = length - thick;
- Real off = period - on;
-
- SCM list = scm_list_n (ly_symbol2scm ("dashed-line"),
- gh_double2scm (thick),
- gh_double2scm (on),
- gh_double2scm (off),
- gh_double2scm (dx),
- gh_double2scm (dy),
- SCM_UNDEFINED);
-
- return list;
+ Grob *me = unsmob_grob (g);
+ Spanner *sp = dynamic_cast<Spanner *> (me);
+
+ /*
+ We remove the line at the start of the line. For piano voice
+ indicators, it makes no sense to have them at the start of the
+ line.
+
+ I'm not sure what the official rules for glissandi are, but
+ usually the 2nd note of the glissando is "exact", so when playing
+ from the start of the line, there is no need to glide.
+
+ From a typographical p.o.v. this makes sense, since the amount of
+ space left of a note at the start of a line is very small.
+
+ --hwn.
+
+ */
+ if (sp->get_bound (LEFT)->break_status_dir ()
+ && !sp->get_bound (RIGHT)->break_status_dir ())
+ {
+ /*
+ Can't do suicide, since this mucks up finding the trend.
+ */
+ me->set_property ("transparent", SCM_BOOL_T);
+ }
+ return SCM_EOL;
}
-Molecule
-Line_spanner::line_molecule (Grob* me, Real thick, Real dx, Real dy)
+Stencil
+Line_spanner::line_stencil (Grob *me,
+ Offset from,
+ Offset to)
{
- Molecule mol;
- SCM type = me->get_grob_property ("type");
- if (gh_symbol_p (type)
+ Offset dz = to -from;
+ SCM type = me->get_property ("style");
+
+ Stencil line;
+
+ if (scm_is_symbol (type)
&& (type == ly_symbol2scm ("line")
|| type == ly_symbol2scm ("dashed-line")
|| type == ly_symbol2scm ("dotted-line")
- || (type == ly_symbol2scm ("trill") && dy != 0)))
+ || type == ly_symbol2scm ("zigzag")
+ || (type == ly_symbol2scm ("trill") && dz[Y_AXIS] != 0)))
{
- Box b (Interval (-0.5* thick + (0 <? dx) ,0.5* thick+ (0 >? dx)),
- Interval (- 0.5* thick + (0<? dy), 0.5*thick + (0 >? dy)));
- mol = Molecule (b, line_atom (me, thick, dx, dy));
+ line = (type == ly_symbol2scm ("zigzag"))
+ ? zigzag_stencil (me, from, to)
+ : Line_interface::line (me, from, to);
}
- else if (gh_symbol_p (type)
+ else if (scm_is_symbol (type)
&& type == ly_symbol2scm ("trill"))
{
- SCM alist_chain = Font_interface::font_alist_chain (me);
- SCM style_chain = scm_list_n (gh_cons (ly_symbol2scm ("font-family"),
- ly_symbol2scm ("music")),
- SCM_UNDEFINED);
-
- Font_metric *fm = Font_interface::get_font (me,
- scm_list_n (style_chain,
- alist_chain,
- SCM_UNDEFINED));
- Molecule m = fm->find_by_name ("scripts-trill-element");
+ SCM alist_chain = Font_interface::text_font_alist_chain (me);
+ SCM style_alist = scm_list_n (scm_cons (ly_symbol2scm ("font-encoding"),
+ ly_symbol2scm ("fetaMusic")),
+ SCM_UNDEFINED);
+
+ Font_metric *fm = select_font (me->layout (),
+ scm_cons (style_alist,
+ alist_chain));
+ Stencil m = fm->find_by_name ("scripts.trill_element");
+ Stencil mol;
+
do
- mol.add_at_edge (X_AXIS, RIGHT, m, 0);
+ mol.add_at_edge (X_AXIS, RIGHT, m, 0, 0);
while (m.extent (X_AXIS).length ()
&& mol.extent (X_AXIS).length ()
- + m.extent (X_AXIS).length () < dx);
+ + m.extent (X_AXIS).length () < dz[X_AXIS])
+ ;
/*
FIXME: should center element on x/y
- */
+ */
mol.translate_axis (m.extent (X_AXIS).length () / 2, X_AXIS);
- mol.translate_axis (-(mol.extent (Y_AXIS)[DOWN]
- + mol.extent (Y_AXIS).length ())/2, Y_AXIS);
- }
- return mol;
-}
+ mol.translate_axis (- (mol.extent (Y_AXIS)[DOWN]
+ + mol.extent (Y_AXIS).length ()) / 2, Y_AXIS);
-Offset
-Line_spanner::get_broken_offset (Grob *me, Direction dir)
-{
- Spanner *spanner = dynamic_cast<Spanner*> (me);
- Item* bound = spanner->get_bound (dir);
-
- if (!bound->break_status_dir ())
- {
- Grob *common[] = {
- bound->common_refpoint (Staff_symbol_referencer::get_staff_symbol (me),
- X_AXIS),
- bound->common_refpoint (Staff_symbol_referencer::get_staff_symbol (me),
- Y_AXIS)
- };
-
- return Offset (abs (bound->extent (common[X_AXIS], X_AXIS)[-dir]),
- bound->extent (common[Y_AXIS], Y_AXIS).center ());
+ mol.translate (from);
+ line = mol;
}
- return Offset ();
+
+ if (to_boolean (me->get_property ("arrow")))
+ line.add_stencil (Line_interface::arrows (me, from, to, false, true));
+
+ return line;
}
-Offset
-Line_spanner::broken_trend_offset (Grob *me, Direction dir)
+/*
+ Find a common Y parent, which --if found-- should be the
+ fixed-distance alignment.
+*/
+Grob *
+line_spanner_common_parent (Grob *me)
{
- /* A broken line-spaner should maintain the same vertical trend
- the unbroken line-spanner would have had.
- From slur */
- Offset o;
- if (Spanner *mother = dynamic_cast<Spanner*> (me->original_))
+ Grob *common = find_fixed_alignment_parent (me);
+ if (!common)
{
- for (int i = dir == LEFT ? 0 : mother->broken_intos_.size () - 1;
- dir == LEFT ? i < mother->broken_intos_.size () : i > 0;
- dir == LEFT ? i++ : i--)
- {
- if (mother->broken_intos_[i - dir] == me)
- {
- Grob *neighbour = mother->broken_intos_[i];
- Offset neighbour_o = get_broken_offset (neighbour, dir);
- Offset me_o = get_broken_offset (me, -dir);
- // Hmm, why not return me_o[X], but recalc in brew_mol?
- o = Offset (0,
- (neighbour_o[Y_AXIS]*me_o[X_AXIS]
- - me_o[Y_AXIS]*neighbour_o[X_AXIS]) * dir /
- (me_o[X_AXIS] + neighbour_o[X_AXIS]));
- break;
- }
- }
+ common = Staff_symbol_referencer::get_staff_symbol (me);
+ if (common)
+ common = common->get_parent (Y_AXIS);
+ else
+ common = me->get_parent (Y_AXIS);
}
- return o;
-}
+ return common;
+}
/*
Warning: this thing is a cross-staff object, so it should have empty Y-dimensions.
- (If not, you risk that this is called from the staff-alignment
- routine, via molecule_extent. At this point, the staves aren't
+ (If not, you risk that this is called from the staff-alignment
+ routine, via stencil_extent. At this point, the staves aren't
separated yet, so it doesn't work cross-staff.
+ (huh? crossable staves have fixed distance? --hwn)
*/
-MAKE_SCHEME_CALLBACK (Line_spanner, brew_molecule, 1);
+MAKE_SCHEME_CALLBACK (Line_spanner, print, 1);
SCM
-Line_spanner::brew_molecule (SCM smob)
+Line_spanner::print (SCM smob)
{
- Grob *me= unsmob_grob (smob);
-
- Spanner *spanner = dynamic_cast<Spanner*> (me);
- Item* bound_drul[] = {
- spanner->get_bound (LEFT),
- 0,
- spanner->get_bound (RIGHT)
- };
-
- Item** bound = bound_drul + 1;
-
- Grob *common[] = { 0, 0 };
- for (Axis a = X_AXIS; a < NO_AXES; a = Axis (a + 1))
- {
- common[a] = bound[LEFT]->common_refpoint (bound[RIGHT], a);
-
- if (!common[a])
- return SCM_EOL;
- }
-
- Real gap = gh_scm2double (me->get_grob_property ("gap"));
- Real dist; /*distance between points */
+ Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
+
+ Drul_array<Item *> bound (me->get_bound (LEFT),
+ me->get_bound (RIGHT));
+
+ Real gap = robust_scm2double (me->get_property ("gap"), 0.0);
- Offset ofxy (gap, 0); /*offset from start point to start of line*/
- Offset dxy ;
+ Offset ofxy (gap, 0); /* offset from start point to start of line */
+ Offset dxy;
Offset my_off;
Offset his_off;
-
- if (bound[LEFT]->break_status_dir () || bound[RIGHT]->break_status_dir ())
- /* across line break */
+ if (bound[RIGHT]->break_status_dir ())
{
- Direction broken = bound[LEFT]->break_status_dir () ? LEFT : RIGHT;
-
- dxy[X_AXIS] = bound[RIGHT]->extent (common[X_AXIS], X_AXIS)[LEFT]
- - bound[LEFT]->extent (common[X_AXIS], X_AXIS)[RIGHT];
-
- dxy += broken_trend_offset (me, broken);
- dxy[X_AXIS] -= 1 * gap;
-
- my_off = Offset (0,
- me->relative_coordinate (common[Y_AXIS], Y_AXIS));
+ if (bound[LEFT]->break_status_dir ())
+ {
+ programming_error ("line-spanner with two broken ends. Farewell sweet world.");
- his_off = Offset (0,
- bound[-broken]->relative_coordinate (common[Y_AXIS],
- Y_AXIS));
+ me->suicide ();
+ return SCM_EOL;
+ }
- if (broken == LEFT)
+ /*
+ This is hairy. For the normal case, we simply find common
+ parents, and draw a line between the bounds. When two note
+ heads are on different systems, there is no common parent
+ anymore. We have to find the piano-staff object.
+ */
+
+ int k = broken_spanner_index (me);
+ Spanner *parent_sp = dynamic_cast<Spanner *> (me->original ());
+ Spanner *next_sp = parent_sp->broken_intos_ [k + 1];
+ Item *next_bound = next_sp->get_bound (RIGHT);
+
+ if (next_bound->break_status_dir ())
{
- my_off[Y_AXIS] += dxy[Y_AXIS];
+ programming_error ("no note heads for the line spanner on next line?"
+ " Confused.");
+ me->suicide ();
+ return SCM_EOL;
}
+
+ Grob *commonx = bound[LEFT]->common_refpoint (bound[RIGHT], X_AXIS);
+ commonx = me->common_refpoint (commonx, X_AXIS);
+
+ Grob *next_common_y = line_spanner_common_parent (next_bound);
+ Grob *this_common_y = line_spanner_common_parent (bound[LEFT]);
+
+ Grob *all_common_y = me->common_refpoint (this_common_y, Y_AXIS);
+
+ Interval next_ext = next_bound->extent (next_common_y, Y_AXIS);
+ Interval this_ext = bound[LEFT]->extent (this_common_y, Y_AXIS);
+
+ Real yoff = this_common_y->relative_coordinate (all_common_y, Y_AXIS);
+
+ Offset p1 (bound[LEFT]->extent (commonx, X_AXIS)[RIGHT],
+ this_ext.center () + yoff);
+ Offset p2 (bound[RIGHT]->extent (commonx, X_AXIS)[LEFT],
+ next_ext.center () + yoff);
+
+ Offset dz (p2 -p1);
+ Real len = dz.length ();
+
+ Offset dir = dz * (1 / len);
+ dz = (dz.length () - 2 * gap) * dir;
+
+ Stencil l (line_stencil (me, Offset (0, 0), dz));
+
+ l.translate (dir * gap + p1
+ - Offset (me->relative_coordinate (commonx, X_AXIS),
+ me->relative_coordinate (all_common_y, Y_AXIS)));
+
+ return l.smobbed_copy ();
}
else
{
- Real off = gap + ((bound[LEFT]->extent (bound[LEFT], X_AXIS).length ()*3)/4); // distance from center to start of line
- dxy[X_AXIS] = bound[RIGHT]->extent (common[X_AXIS], X_AXIS).center ()
- - bound[LEFT]->extent (common[X_AXIS], X_AXIS).center ();
- dxy[Y_AXIS] = bound[RIGHT]->extent (common[Y_AXIS], Y_AXIS).center ()
- - bound[LEFT]->extent (common[Y_AXIS], Y_AXIS).center ();
-
- dist = sqrt (dxy[X_AXIS]*dxy[X_AXIS]+dxy[Y_AXIS]*dxy[Y_AXIS]);
- ofxy = dxy* (off/dist);
- dxy -= 2*ofxy;
+ Grob *common[] = { me, me };
+ for (int a = X_AXIS; a < NO_AXES; a++)
+ {
+ common[a] = me->common_refpoint (bound[RIGHT], Axis (a));
+ common[a] = common[a]->common_refpoint (bound[LEFT], Axis (a));
+ }
- my_off = Offset (me->relative_coordinate (common[X_AXIS], X_AXIS),
- me->relative_coordinate (common[Y_AXIS], Y_AXIS));
-
- his_off = Offset (bound[LEFT]->relative_coordinate (common[X_AXIS],
- X_AXIS),
- bound[LEFT]->relative_coordinate (common[Y_AXIS],
- Y_AXIS));
-
- }
-
- Real thick = me->get_paper ()->get_var ("linethickness");
-
- SCM s = me->get_grob_property ("thickness");
- if (gh_number_p (s))
- thick *= gh_scm2double (s);
-
-
- Molecule line = line_molecule (me, thick, dxy[X_AXIS], dxy[Y_AXIS]);
- line.translate_axis (bound[LEFT]->extent (bound[LEFT],
- X_AXIS).length ()/2, X_AXIS);
- line.translate (ofxy - my_off + his_off);
- return line.smobbed_copy ();
-}
+ // distance from center to start of line
+ Real off = gap + ((bound[LEFT]->extent (bound[LEFT], X_AXIS).length () * 3) / 4);
+ for (int a = X_AXIS; a < NO_AXES; a++)
+ {
+ Axis ax = (Axis)a;
+ dxy[ax]
+ = + robust_relative_extent (bound[RIGHT], common[X_AXIS], ax).center ()
+ - robust_relative_extent (bound[LEFT], common[X_AXIS], ax).center ();
+ my_off[ax] = me->relative_coordinate (common[a], ax);
+ his_off[ax] = bound[LEFT]->relative_coordinate (common[a], ax);
+ }
-ADD_INTERFACE (Line_spanner, "line-spanner-interface",
- "Generic line drawn between two objects, eg. for use with glissandi.
-gap is measured in staff-spaces. ",
- "gap dash-period dash-length thickness type");
+ ofxy = dxy * (off / dxy.length ());
+ dxy -= 2*ofxy;
+
+ Stencil line = line_stencil (me, Offset (0, 0), dxy);
+ line.translate_axis (bound[LEFT]->extent (bound[LEFT], X_AXIS).length () / 2, X_AXIS);
+ line.translate (ofxy - my_off + his_off);
+ return line.smobbed_copy ();
+ }
+}
+
+ADD_INTERFACE (Line_spanner, "line-spanner-interface",
+ "Generic line drawn between two objects, e.g. for use with glissandi.\n"
+ "The property @code{style} can be @code{line}, "
+ "@code{dashed-line}, @code{trill}, \n"
+ "@code{dotted-line} or @code{zigzag}.\n"
+ "\n",
+ "gap zigzag-width zigzag-length thickness arrow");
projects / lilypond.git / blobdiff