/*
- bar-engraver.cc -- implement Bar_engraver
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
-
- (c) 1997, 1998, 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
+
+ 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 "context.hh"
#include "score-engraver.hh"
-#include "bar-engraver.hh"
-#include "staff-bar.hh"
-#include "musical-request.hh"
-#include "multi-measure-rest.hh"
-#include "command-request.hh"
-#include "timing-engraver.hh"
-#include "engraver-group-engraver.hh"
#include "warn.hh"
+#include "item.hh"
+#include "spanner.hh"
-ADD_THIS_TRANSLATOR (Bar_engraver);
+#include "translator.icc"
-Bar_engraver::Bar_engraver()
+/*
+ generate bars. Either user ("|:"), or default (new measure)
+*/
+class Bar_engraver : public Engraver
{
- bar_p_ =0;
- do_post_move_processing();
-}
+public:
+ TRANSLATOR_DECLARATIONS (Bar_engraver);
+
+protected:
+ void stop_translation_timestep ();
+ void process_acknowledged ();
+ void acknowledge_end_spanner (Grob_info);
+private:
+ void create_bar ();
+ Item *bar_;
+ vector<Spanner *> spanners_;
+};
+
+Bar_engraver::Bar_engraver (Context *c)
+ : Engraver (c)
+{
+ bar_ = 0;
+}
void
Bar_engraver::create_bar ()
{
- if (!bar_p_)
+ if (!bar_)
{
- bar_p_ = new Staff_bar;
- bar_p_->set_elt_property ("break-aligned", SCM_BOOL_T);
-
- // urg: "" != empty...
- SCM default_type = get_property ("defaultBarType", 0);
- if (gh_string_p (default_type))
- {
- bar_p_->set_elt_property ("glyph", default_type); // gu.h
- }
-
-#if 0
- /*
- urg. Why did I implement this? And did I implement this so
- clumsily? */
- SCM prop = get_property ("barAtLineStart", 0);
- if (to_boolean (prop))
- {
- bar_p_->set_elt_property ("at-line-start", SCM_BOOL_T);
- }
-#endif
- announce_element (Score_element_info (bar_p_, 0));
+ bar_ = make_item ("BarLine", SCM_EOL);
+ SCM gl = get_property ("whichBar");
+ if (!ly_is_equal (gl, bar_->get_property ("glyph")))
+ bar_->set_property ("glyph", gl);
}
}
-/**
- Make a barline. If there are both |: and :| requested, merge them
- to :|:.
-
+/*
+ Bar_engraver should come *after* any engravers that
+ modify whichBar
+
+ This is a little hairy : whichBar may be set by
+ Repeat_acknowledge_engraver::process_music, which is at score
+ context. This means that grobs could should be created after
+ process_music. We do stuff process_acknowledged (), just to be
+ on the safe side.
*/
+
void
-Bar_engraver::request_bar (String requested_type)
+Bar_engraver::process_acknowledged ()
{
- if (!now_mom ())
- {
- SCM prop = get_property ("barAtLineStart", 0);
- if (!to_boolean (prop))
- return;
- }
- bool bar_existed = bar_p_;
- create_bar ();
- if (bar_existed && requested_type == "")
- {
- return;
- }
+ if (!bar_ && scm_is_string (get_property ("whichBar")))
+ create_bar ();
- String current = ly_scm2string (bar_p_->get_elt_property ("glyph"));
-
- if ((requested_type == "|:" && current== ":|")
- || (requested_type == ":|" && current == "|:"))
- requested_type = ":|:";
-
-
- bar_p_->set_elt_property ("glyph",
- ly_str02scm (requested_type.ch_C ()));
-}
-
-void
-Bar_engraver::do_creation_processing ()
-{
+ if (bar_)
+ for (vsize i = 0; i < spanners_.size (); i++)
+ spanners_[i]->set_bound (RIGHT, bar_);
}
+/*
+ lines may only be broken if there is a barline in all staves
+*/
void
-Bar_engraver::do_removal_processing ()
+Bar_engraver::stop_translation_timestep ()
{
- if (bar_p_)
- {
- typeset_element (bar_p_);
- bar_p_ =0;
- }
+ if (!bar_)
+ context ()->get_score_context ()->set_property ("forbidBreak", SCM_BOOL_T);
+
+ bar_ = 0;
+ spanners_.clear ();
}
void
-Bar_engraver::do_process_requests()
-{
- Translator * t = daddy_grav_l ()->get_simple_translator ("Timing_engraver");
-
- Timing_engraver * te = dynamic_cast<Timing_engraver*>(t);
- String which = (te) ? te->which_bar () : "";
+Bar_engraver::acknowledge_end_spanner (Grob_info gi)
+{
+ Grob *g = gi.grob ();
- if (which.length_i ())
- {
- create_bar();
- bar_p_->set_elt_property ("glyph", ly_str02scm (which.ch_C ()));
- }
-
- if (!bar_p_)
- {
- Score_engraver * e = 0;
- Translator * t = daddy_grav_l ();
- for (; !e && t; t = t->daddy_trans_l_)
- {
- e = dynamic_cast<Score_engraver*> (t);
- }
-
- if (!e)
- programming_error ("No score engraver!");
- else
- e->forbid_breaks ();
- }
+ if (to_boolean (g->get_property ("to-barline")))
+ spanners_.push_back (dynamic_cast<Spanner *> (g));
}
-void
-Bar_engraver::do_pre_move_processing()
+void
+Bar_engraver::boot ()
{
- if (bar_p_)
- {
- typeset_element (bar_p_);
- bar_p_ =0;
- }
+ ADD_END_ACKNOWLEDGER (Bar_engraver, spanner);
}
+ADD_TRANSLATOR (Bar_engraver,
+ /* doc */
+ "Create barlines. This engraver is controlled through the"
+ " @code{whichBar} property. If it has no bar line to create,"
+ " it will forbid a linebreak at this point. This engraver"
+ " is required to trigger the creation of clefs at the start"
+ " of systems.",
+
+ /* create */
+ "BarLine ",
+
+ /* read */
+ "whichBar ",
+
+ /* write */
+ "forbidBreak "
+ );
projects / lilypond.git / blobdiff