source file of the GNU LilyPond music typesetter
- (c) 1997, 1998, 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "bar-engraver.hh"
-#include "bar.hh"
-#include "musical-request.hh"
-#include "multi-measure-rest.hh"
-#include "command-request.hh"
-#include "time-description.hh"
-#include "engraver-group.hh"
-#include "repeated-music.hh"
+#include "bar-line.hh"
+#include "score-engraver.hh"
+#include "event.hh"
+#include "engraver-group-engraver.hh"
+#include "warn.hh"
+#include "item.hh"
+#include "engraver.hh"
-Bar_engraver::Bar_engraver()
-{
- bar_p_ =0;
- do_post_move_processing();
-}
+/*
+ generate bars. Either user ("|:"), or default (new measure)
-bool
-Bar_engraver::do_try_music (Music*r_l)
+ */
+class Bar_engraver : public Engraver
{
- if (Bar_req * b= dynamic_cast <Bar_req *> (r_l))
- {
- if (bar_req_l_ && bar_req_l_->equal_b (b)) // huh?
- return false;
-
- bar_req_l_ = b;
- return true;
- }
-
- return false;
-
-}
-
-void
-Bar_engraver::acknowledge_element (Score_element_info i)
+public:
+ TRANSLATOR_DECLARATIONS( Bar_engraver );
+ void request_bar (String type_string);
+
+protected:
+ virtual void finalize ();
+ virtual void stop_translation_timestep ();
+ virtual void process_acknowledged_grobs ();
+
+private:
+ void typeset_bar ();
+ void create_bar ();
+
+ Item * bar_;
+};
+
+Bar_engraver::Bar_engraver ()
{
- if (Bar *b = dynamic_cast<Bar *> (i.elem_l_))
- {
- // only bar-engraver should create bars
- assert (0);
- }
+ bar_ =0;
}
void
Bar_engraver::create_bar ()
{
- if (!bar_p_)
+ if (!bar_)
{
- bar_p_ = new Bar;
- bar_p_->break_priority_i_ = 0;
- // urg: "" != empty...
- String default_type = get_property ("defaultBarType", 0);
- if (default_type.length_i ())
- {
- bar_p_->type_str_ = default_type;
- }
- Scalar prop = get_property ("barAtLineStart", 0);
- if (prop.to_bool ())
- {
- bar_p_->at_line_start_b_ = true;
- }
- announce_element (Score_element_info (bar_p_, bar_req_l_));
+ bar_ = make_item ("BarLine");
+ SCM gl = get_property ("whichBar");
+ if (scm_equal_p (gl, bar_->get_grob_property ("glyph")) != SCM_BOOL_T)
+ bar_->set_grob_property ("glyph", gl);
+
+ announce_grob(bar_, SCM_EOL);
}
}
void
-Bar_engraver::request_bar (String type_str)
+Bar_engraver::finalize ()
{
- Scalar prop = get_property ("barAtLineStart", 0);
- if (!now_mom ())
- {
- Scalar prop = get_property ("barAtLineStart", 0);
- if (!prop.to_bool ())
- return;
- }
- create_bar ();
- if (((type_str == "|:") && (bar_p_->type_str_ == ":|"))
- || ((type_str == ":|") && (bar_p_->type_str_ == "|:")))
- bar_p_->type_str_ = ":|:";
- else
- bar_p_->type_str_ = type_str;
+ typeset_bar ();
}
-void
-Bar_engraver::do_creation_processing ()
-{
- create_bar ();
- bar_p_->type_str_ = "";
- Scalar prop = get_property ("barAuto", 0);
- auto_create_bar_b_ = prop.to_bool ();
-}
+/*
+ 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_grobs(), just to be
+ on the safe side.
+
+*/
void
-Bar_engraver::do_removal_processing ()
+Bar_engraver::process_acknowledged_grobs ()
{
- if (bar_p_)
+ if (!bar_ && gh_string_p (get_property ("whichBar")))
{
- typeset_element (bar_p_);
- bar_p_ =0;
+ create_bar ();
}
}
void
-Bar_engraver::do_process_requests()
-{
- Time_description const *time = get_staff_info().time_C_;
- if (bar_req_l_)
- {
- create_bar ();
- bar_p_->type_str_ = bar_req_l_->type_str_;
- }
- else if (!now_mom ())
- {
- create_bar ();
- bar_p_->type_str_ = "|";
- }
- else
- {
- Scalar always = get_property ("barAlways", 0);
- if ((time && !time->whole_in_measure_) || always.to_bool ())
- {
- if (auto_create_bar_b_)
- create_bar ();
- Scalar prop = get_property ("barAuto", 0);
- auto_create_bar_b_ = prop.to_bool ();
- }
- }
-
- if (!bar_p_)
+Bar_engraver::typeset_bar ()
+{
+ if (bar_)
{
- Break_req r;
- r.penalty_i_ = Break_req::DISALLOW;
- daddy_grav_l ()->try_music (&r);
+ typeset_grob (bar_);
+ bar_ =0;
}
}
-
+/*
+ lines may only be broken if there is a barline in all staves
+*/
void
-Bar_engraver::do_pre_move_processing()
+Bar_engraver::stop_translation_timestep ()
{
- if (bar_p_)
+ if (!bar_)
{
- typeset_element (bar_p_);
- bar_p_ =0;
+ top_engraver ()->forbid_breaks (); // guh. Use properties!
}
+ else
+ typeset_bar ();
}
-void
-Bar_engraver::do_post_move_processing()
-{
- bar_req_l_ = 0;
-}
-
-
-
-ADD_THIS_TRANSLATOR(Bar_engraver);
-
+ENTER_DESCRIPTION(Bar_engraver,
+/* descr */ "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",
+/* creats*/ "BarLine",
+/* accepts */ "",
+/* acks */ "",
+/* reads */ "whichBar",
+/* write */ "");