--- /dev/null
+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Mats Bengtsson <matsb@s3.kth.se>
+ Copyright (C) 2010--2011 Reinhold Kainhofer <reinhold@kainhofer.com>
+
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <cctype>
+using namespace std;
+
+#include "item.hh"
+#include "context.hh"
+#include "bar-line.hh"
+#include "staff-symbol-referencer.hh"
+#include "engraver.hh"
+#include "direction.hh"
+#include "side-position-interface.hh"
+#include "warn.hh"
+#include "international.hh"
+
+#include "translator.icc"
+
+class Cue_clef_engraver : public Engraver
+{
+public:
+ TRANSLATOR_DECLARATIONS (Cue_clef_engraver);
+
+protected:
+ void stop_translation_timestep ();
+ void process_music ();
+ DECLARE_ACKNOWLEDGER (bar_line);
+
+ virtual void derived_mark () const;
+private:
+ Item *clef_;
+ Item *octavate_;
+
+ SCM prev_glyph_;
+ SCM prev_cpos_;
+ SCM prev_octavation_;
+ void create_clef ();
+ void create_end_clef ();
+ void set_glyph ();
+ void inspect_clef_properties ();
+ void create_octavate_eight (SCM oct);
+};
+
+void
+Cue_clef_engraver::derived_mark () const
+{
+ scm_gc_mark (prev_octavation_);
+ scm_gc_mark (prev_cpos_);
+ scm_gc_mark (prev_glyph_);
+}
+
+Cue_clef_engraver::Cue_clef_engraver ()
+{
+ clef_ = 0;
+ octavate_ = 0;
+
+ prev_octavation_ = prev_cpos_ = prev_glyph_ = SCM_EOL;
+}
+
+void
+Cue_clef_engraver::set_glyph ()
+{
+ SCM glyph_sym = ly_symbol2scm ("glyph");
+ SCM basic = ly_symbol2scm ("CueClef");
+ execute_pushpop_property (context (), basic, glyph_sym, SCM_UNDEFINED);
+ execute_pushpop_property (context (), basic, glyph_sym, get_property ("cueClefGlyph"));
+
+ basic = ly_symbol2scm ("CueEndClef");
+ execute_pushpop_property (context (), basic, glyph_sym, SCM_UNDEFINED);
+ execute_pushpop_property (context (), basic, glyph_sym, get_property ("clefGlyph"));
+}
+
+/**
+ Generate a clef at the start of a measure. (when you see a Bar,
+ ie. a breakpoint)
+*/
+void
+Cue_clef_engraver::acknowledge_bar_line (Grob_info info)
+{
+ Item *item = info.item ();
+ if (item && scm_is_string (get_property ("cueClefGlyph")))
+ create_clef ();
+}
+
+void
+Cue_clef_engraver::create_octavate_eight (SCM oct)
+{
+ if (scm_is_number (oct) && scm_to_int (oct))
+ {
+ Item *g = make_item ("OctavateEight", SCM_EOL);
+
+ int abs_oct = scm_to_int (oct);
+ int dir = sign (abs_oct);
+ abs_oct = abs (abs_oct) + 1;
+
+ SCM txt = scm_number_to_string (scm_from_int (abs_oct),
+ scm_from_int (10));
+
+ g->set_property ("text",
+ scm_list_n (ly_lily_module_constant ("vcenter-markup"),
+ txt, SCM_UNDEFINED));
+ Side_position_interface::add_support (g, clef_);
+
+ g->set_parent (clef_, Y_AXIS);
+ g->set_parent (clef_, X_AXIS);
+ g->set_property ("direction", scm_from_int (dir));
+ octavate_ = g;
+ }
+}
+
+void
+Cue_clef_engraver::create_clef ()
+{
+ if (!clef_)
+ {
+ Item *c = make_item ("CueClef", SCM_EOL);
+
+ clef_ = c;
+ SCM cpos = get_property ("cueClefPosition");
+ if (scm_is_number (cpos))
+ clef_->set_property ("staff-position", cpos);
+
+ create_octavate_eight (get_property ("cueClefOctavation"));
+ }
+}
+
+void
+Cue_clef_engraver::create_end_clef ()
+{
+ if (!clef_)
+ {
+ clef_ = make_item ("CueEndClef", SCM_EOL);
+ SCM cpos = get_property ("clefPosition");
+ if (scm_is_number (cpos))
+ clef_->set_property ("staff-position", cpos);
+
+ create_octavate_eight (get_property ("clefOctavation"));
+ }
+}
+
+void
+Cue_clef_engraver::process_music ()
+{
+ inspect_clef_properties ();
+}
+
+void
+Cue_clef_engraver::inspect_clef_properties ()
+{
+ SCM glyph = get_property ("cueClefGlyph");
+ SCM clefpos = get_property ("cueClefPosition");
+ SCM octavation = get_property ("cueClefOctavation");
+
+ if (scm_equal_p (glyph, prev_glyph_) == SCM_BOOL_F
+ || scm_equal_p (clefpos, prev_cpos_) == SCM_BOOL_F
+ || scm_equal_p (octavation, prev_octavation_) == SCM_BOOL_F)
+ {
+ set_glyph ();
+ if (scm_is_string (glyph))
+ {
+ create_clef ();
+ if (clef_)
+ clef_->set_property ("non-default", SCM_BOOL_T);
+ }
+ else
+ create_end_clef ();
+
+ prev_cpos_ = clefpos;
+ prev_glyph_ = glyph;
+ prev_octavation_ = octavation;
+ }
+
+}
+
+void
+Cue_clef_engraver::stop_translation_timestep ()
+{
+ if (clef_)
+ {
+ SCM vis = 0;
+ if (to_boolean (clef_->get_property ("non-default")))
+ vis = get_property ("explicitCueClefVisibility");
+
+ if (vis)
+ clef_->set_property ("break-visibility", vis);
+
+ clef_ = 0;
+ octavate_ = 0;
+ }
+}
+
+ADD_ACKNOWLEDGER (Cue_clef_engraver, bar_line);
+ADD_TRANSLATOR (Cue_clef_engraver,
+ /* doc */
+ "Determine and set reference point for pitches in cued voices.",
+
+ /* create */
+ "CueClef "
+ "CueEndClef "
+ "OctavateEight ",
+
+ /* read */
+ "cueClefGlyph "
+ "cueClefOctavation "
+ "cueClefPosition "
+ "explicitCueClefVisibility "
+ "middleCCuePosition "
+ "clefOctavation ",
+
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff