+/*
+ text-spanner.cc -- implement Text_spanner
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
+*/
+
+#include "molecule.hh"
+#include "text-spanner.hh"
+#include "spanner.hh"
+#include "lookup.hh"
+#include "dimensions.hh"
+#include "paper-def.hh"
+#include "debug.hh"
+#include "paper-column.hh"
+#include "staff-symbol-referencer.hh"
+
+/*
+ Generic Text spanner:
+
+ type: "line", "dashed-line", "dotted-line"
+ text: "text"
+ edge-text: ("le" . "re")
+ text-style: "italic"
+
+ not-yet-text
+ le -------------- re
+
+ TODO:
+ - vertical start / vertical end (fixme-name) |
+ - contination types (vert. star, vert. end) |-> eat volta-spanner
+ - more styles
+ - more texts/positions
+ - style: hairpin ?
+ */
+
+MAKE_SCHEME_CALLBACK (Text_spanner, brew_molecule, 1);
+
+SCM
+Text_spanner::brew_molecule (SCM smob)
+{
+ Score_element *me= unsmob_element (smob);
+ Spanner *spanner = dynamic_cast<Spanner*> (me);
+
+ Real staff_space = Staff_symbol_referencer::staff_space (me);
+ Real line = me->paper_l ()->get_var ("stafflinethickness");
+
+
+ Drul_array<bool> broken;
+ Direction d = LEFT;
+ do
+ {
+ Paper_column* s = dynamic_cast<Paper_column*>(spanner->get_bound (d)); // UGH
+ broken[d] = (!s->musical_b ());
+ }
+ while (flip (&d) != LEFT);
+
+ SCM s = me->get_elt_property ("text-style");
+ String text_style = "italic";
+ if (gh_string_p (s))
+ text_style = ly_scm2string (s);
+
+ SCM edge_text = me->get_elt_property ("edge-text");
+ Drul_array<Molecule> edge;
+ if (gh_pair_p (edge_text))
+ {
+ edge[LEFT] = me->lookup_l ()->text (text_style,
+ ly_scm2string (gh_car (edge_text)),
+ me->paper_l ());
+ if (!edge[LEFT].empty_b ())
+ edge[LEFT].align_to (Y_AXIS, CENTER);
+ edge[RIGHT] = me->lookup_l ()->text (text_style,
+ ly_scm2string (gh_cdr (edge_text)),
+ me->paper_l ());
+ if (!edge[RIGHT].empty_b ())
+ edge[RIGHT].align_to (Y_AXIS, CENTER);
+ }
+
+ Drul_array<Real> shorten;
+ shorten[LEFT] = 0;
+ shorten[RIGHT] = 0;
+
+ s = me->get_elt_property ("shorten");
+ if (gh_pair_p (s))
+ {
+ shorten[LEFT] = gh_scm2double (gh_car (s)) * staff_space;
+ shorten[RIGHT] = gh_scm2double (gh_cdr (s)) * staff_space;
+ }
+
+ Real broken_left = spanner->get_broken_left_end_align ();
+ Real width = spanner->spanner_length ();
+ width += spanner->get_bound (RIGHT)->extent (X_AXIS).length ();
+ width -= broken_left;
+ width -= shorten[LEFT] + shorten[RIGHT];
+ width -= edge[LEFT].extent (X_AXIS).length ()
+ + edge[RIGHT].extent (X_AXIS).length ();
+
+ if (width < 0)
+ {
+ warning (_ ("Text_spanner too small"));
+ width = 0;
+ }
+
+
+ String type = "dashed-line";
+ s = me->get_elt_property ("type");
+ if (gh_string_p (s))
+ type = ly_scm2string (s);
+
+ Real height;
+ SCM at;
+ if (type == "line"
+ || type == "dashed-line"
+ || type == "dotted-line")
+ {
+ Real thick = line;
+ s = me->get_elt_property ("line-thickness");
+ if (gh_number_p (s))
+ thick *= gh_scm2double (s);
+
+ // maybe these should be in line-thickness?
+ Real length = staff_space;
+ s = me->get_elt_property ("dash-length");
+ if (gh_number_p (s))
+ length = gh_scm2double (s) * staff_space;
+
+ Real period = 2 * length + thick;
+ s = me->get_elt_property ("dash-period");
+ if (gh_number_p (s))
+ period = gh_scm2double (s) * staff_space;
+
+ if (type == "dotted-line")
+ length = thick;
+
+ if (type == "line")
+ length = period + thick;
+
+ Real on = length - thick;
+ Real off = period - on;
+
+ height = thick;
+ at = gh_list (ly_symbol2scm ("dashed-line"),
+ gh_double2scm (thick),
+ gh_double2scm (on),
+ gh_double2scm (off),
+ gh_double2scm (width),
+ SCM_UNDEFINED);
+ }
+ Box b (Interval (0, width), Interval (-height / 2, height / 2));
+ Molecule span (b, at);
+
+ Molecule m;
+ if (!edge[LEFT].empty_b ())
+ m = edge[LEFT];
+
+ if (!span.empty_b ())
+ m.add_at_edge (X_AXIS, RIGHT, span, 0);
+ if (!edge[RIGHT].empty_b ())
+ m.add_at_edge (X_AXIS, RIGHT, edge[RIGHT], 0);
+ m.translate_axis (broken_left, X_AXIS);
+
+ return m.create_scheme ();
+}
+
+