/*
- bar-number-grav.cc -- implement Bar_number_engraver
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ 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 <algorithm> // for reverse
+
+#include "paper-column.hh"
+#include "output-def.hh"
+#include "side-position-interface.hh"
+#include "engraver.hh"
+#include "context.hh"
+#include "grob-array.hh"
+#include "stream-event.hh"
-#include "bar-number-engraver.hh"
-#include "time-description.hh"
-#include "timing-engraver.hh"
-#include "engraver-group.hh"
-#include "g-text-item.hh"
+#include "translator.icc"
-Bar_number_engraver::Bar_number_engraver()
+/*
+ TODO: detect the top staff (stavesFound), and acknowledge staff-group
+ system-start-delims. If we find these, and the top staff is in the
+ staff-group, add padding to the bar number.
+*/
+class Bar_number_engraver : public Engraver
{
- axis_ = Y_AXIS;
- type_ = "barNumber";
- visibility_lambda_
- = gh_eval_str ("(lambda (d) (if (= d 1) '(#f . #f) '(#t . #t)))");
+protected:
+ Item *text_;
+ int alternative_starting_bar_number_;
+ int alternative_number_;
+ int alternative_number_increment_;
+ Stream_event *alternative_event_;
+
+protected:
+ void stop_translation_timestep ();
+ void listen_alternative (Stream_event *);
+ void acknowledge_break_alignment (Grob_info);
+ void process_music ();
+ void create_items ();
+ TRANSLATOR_DECLARATIONS (Bar_number_engraver);
+};
+
+void
+Bar_number_engraver::listen_alternative (Stream_event *ev)
+{
+ if (alternative_event_)
+ return;
+
+ alternative_event_ = ev;
+ int current_barnumber = robust_scm2int (get_property ("currentBarNumber"), 0);
+ Direction alternative_dir = robust_scm2dir (ev->get_property ("alternative-dir"), CENTER);
+ bool make_alternative = scm_is_eq (get_property ("alternativeNumberingStyle"),
+ ly_symbol2scm ("numbers"))
+ || scm_is_eq (get_property ("alternativeNumberingStyle"),
+ ly_symbol2scm ("numbers-with-letters"));
+ if (make_alternative)
+ {
+ /*
+ if we're starting the first alternative, we set the starting
+ bar number to the current bar number
+ */
+ if (alternative_dir == LEFT)
+ alternative_starting_bar_number_ = current_barnumber;
+
+ /*
+ if the alternative is not the last one, we send the
+ current bar number back to the alternative bar number.
+ */
+ if (alternative_dir < RIGHT)
+ current_barnumber = alternative_starting_bar_number_;
+
+ context ()->set_property ("currentBarNumber", scm_from_int (current_barnumber));
+ }
}
void
-Bar_number_engraver::do_process_requests ()
+Bar_number_engraver::process_music ()
{
- Translator *tr = daddy_grav_l ()->get_simple_translator ("Timing_engraver");
- Timing_translator *timer = dynamic_cast<Timing_translator*>(tr);
- Time_description *time = &timer->time_;
+ SCM wb = get_property ("whichBar");
- if (!time->whole_in_measure_ && !time->cadenza_b_ && now_moment () > Moment (0))
+ if (scm_is_string (wb))
{
- create_items (0);
-
- text_p_->text_str_ = to_str (time->bars_i_);
- text_p_->style_str_ = "roman";
+ Moment mp (robust_scm2moment (get_property ("measurePosition"), Moment (0)));
+ SCM bn = get_property ("currentBarNumber");
+ SCM proc = get_property ("barNumberVisibility");
+ if (scm_is_number (bn) && ly_is_procedure (proc)
+ && to_boolean (scm_call_2 (proc, bn, mp.smobbed_copy ())))
+ {
+ create_items ();
+ SCM alternative_style = get_property ("alternativeNumberingStyle");
+ string text_tag = "";
+ if (scm_is_eq (alternative_style, ly_symbol2scm ("numbers-with-letters")))
+ {
+ if (alternative_event_)
+ {
+ Direction alternative_dir = robust_scm2dir (alternative_event_->get_property ("alternative-dir"), RIGHT);
+ switch (alternative_dir)
+ {
+ case LEFT:
+ alternative_number_ = 0;
+ break;
+ case CENTER:
+ break;
+ case RIGHT:
+ alternative_number_ = INT_MIN;
+ break;
+ default:
+ assert (false);
+ }
+ alternative_number_ += alternative_number_increment_;
+
+ alternative_number_increment_ = robust_scm2int (alternative_event_->get_property ("alternative-increment"), 1);
+ }
+ }
+ SCM formatter = get_property ("barNumberFormatter");
+ if (ly_is_procedure (formatter))
+ text_->set_property ("text", scm_call_4 (formatter,
+ bn,
+ mp.smobbed_copy (),
+ scm_from_int (alternative_number_),
+ context ()->self_scm ()));
+ }
}
}
-ADD_THIS_TRANSLATOR(Bar_number_engraver);
+Bar_number_engraver::Bar_number_engraver (Context *c)
+ : Engraver (c)
+{
+ text_ = 0;
+ alternative_starting_bar_number_ = 0;
+ alternative_number_increment_ = 0;
+ alternative_number_ = INT_MIN;
+ alternative_event_ = 0;
+}
+
+void
+Bar_number_engraver::acknowledge_break_alignment (Grob_info inf)
+{
+ Grob *s = inf.grob ();
+ if (text_
+ && dynamic_cast<Item *> (s))
+ {
+ text_->set_parent (s, X_AXIS);
+ }
+}
+
+void
+Bar_number_engraver::stop_translation_timestep ()
+{
+ alternative_event_ = 0;
+ if (text_)
+ {
+ text_->set_object ("side-support-elements",
+ grob_list_to_grob_array (get_property ("stavesFound")));
+ text_ = 0;
+ }
+}
+
+void
+Bar_number_engraver::create_items ()
+{
+ if (text_)
+ return;
+
+ text_ = make_item ("BarNumber", SCM_EOL);
+}
+
+
+void
+Bar_number_engraver::boot ()
+{
+ ADD_LISTENER (Bar_number_engraver, alternative);
+ ADD_ACKNOWLEDGER (Bar_number_engraver, break_alignment);
+}
+
+ADD_TRANSLATOR (Bar_number_engraver,
+ /* doc */
+ "A bar number is created whenever @code{measurePosition} is"
+ " zero and when there is a bar line (i.e., when"
+ " @code{whichBar} is set). It is put on top of all staves,"
+ " and appears only at the left side of the staff. The staves"
+ " are taken from @code{stavesFound}, which is maintained by"
+ " @ref{Staff_collecting_engraver}.",
+
+ /* create */
+ "BarNumber ",
+
+ /* read */
+ "currentBarNumber "
+ "whichBar "
+ "stavesFound "
+ "barNumberFormatter "
+ "barNumberVisibility "
+ "alternativeNumberingStyle ",
+
+ /* write */
+ "currentBarNumber "
+ );
projects / lilypond.git / blobdiff