/*
- span-bar-engraver.cc -- implement Span_bar_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--1999 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 "base-span-bar-engraver.hh"
+#include "item.hh"
+#include "engraver.hh"
+#include "pointer-group-interface.hh"
+#include "lily-imports.hh"
+
+#include "translator.icc"
-class Span_bar_engraver : public Base_span_bar_engraver
+/**
+
+Make bars that span multiple "staves". Catch bars, and span a
+Span_bar over them if we find more than 2 bars. Vertical alignment
+of staves changes the appearance of spanbars. It is up to the
+aligner (Vertical_align_engraver, in this case, to add extra
+dependencies to the spanbars.
+*/
+class Span_bar_engraver : public Engraver
{
+ Item *spanbar_;
+ bool make_spanbar_;
+ vector<Item *> bars_;
+
public:
- Span_bar_engraver ();
- VIRTUAL_COPY_CONS (Translator);
+ TRANSLATOR_DECLARATIONS (Span_bar_engraver);
+protected:
+ DECLARE_ACKNOWLEDGER (bar_line);
+ void stop_translation_timestep ();
+ void process_acknowledged ();
};
-ADD_THIS_TRANSLATOR (Span_bar_engraver);
-
Span_bar_engraver::Span_bar_engraver ()
{
- use_priority_b_ = false;
+ spanbar_ = 0;
+ make_spanbar_ = false;
+}
+
+void
+Span_bar_engraver::acknowledge_bar_line (Grob_info i)
+{
+ int depth = i.origin_contexts (this).size ();
+ if (depth && !i.grob ()->internal_has_interface (ly_symbol2scm ("span-bar-interface")))
+ {
+ Item *it = dynamic_cast<Item *> (i.grob ());
+ bars_.push_back (it);
+
+ if (bars_.size () >= 2 && !spanbar_)
+ make_spanbar_ = true;
+ }
+}
+
+void
+Span_bar_engraver::process_acknowledged ()
+{
+ if (make_spanbar_)
+ {
+ spanbar_ = make_item ("SpanBar", SCM_EOL);
+
+ spanbar_->set_parent (bars_[0], X_AXIS);
+ for (vsize i = 0; i < bars_.size (); i++)
+ Pointer_group_interface::add_grob (spanbar_, ly_symbol2scm ("elements"), bars_[i]);
+ make_spanbar_ = false;
+ }
}
+
+void
+Span_bar_engraver::stop_translation_timestep ()
+{
+ if (spanbar_)
+ {
+ SCM vis = bars_[0]->get_property ("break-visibility");
+ if (ly_is_equal (spanbar_->get_property ("break-visibility"), vis))
+ spanbar_->set_property ("break-visibility", vis);
+ Lily::span_bar_notify_grobs_of_my_existence (spanbar_->self_scm ());
+ spanbar_ = 0;
+ }
+ bars_.resize (0);
+}
+
+ADD_ACKNOWLEDGER (Span_bar_engraver, bar_line);
+ADD_TRANSLATOR (Span_bar_engraver,
+ /* doc */
+ "Make cross-staff bar lines: It catches all normal bar lines"
+ " and draws a single span bar across them.",
+
+ /* create */
+ "SpanBar ",
+
+ /* read */
+ "",
+
+ /* write */
+ ""
+ );