source file of the GNU LilyPond music typesetter
- (c) 1997, 1998, 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
*/
+
+#include "bar-line.hh"
+#include "context.hh"
+#include "score-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 "time-description.hh"
-#include "engraver-group-engraver.hh"
#include "warn.hh"
+#include "item.hh"
-Bar_engraver::Bar_engraver()
-{
- bar_p_ =0;
- do_post_move_processing();
-}
+#include "translator.icc"
-bool
-Bar_engraver::do_try_music (Music*r_l)
+/*
+ generate bars. Either user ("|:"), or default (new measure)
+*/
+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;
-}
+public:
+ TRANSLATOR_DECLARATIONS (Bar_engraver);
+ void request_bar (string type_string);
+protected:
+ virtual void finalize ();
+ void stop_translation_timestep ();
+ void process_acknowledged ();
+private:
+ void typeset_bar ();
+ void create_bar ();
-void
-Bar_engraver::create_bar ()
+ Item *bar_;
+};
+
+Bar_engraver::Bar_engraver ()
{
- if (!bar_p_)
- {
- bar_p_ = new Staff_bar;
- bar_p_->set_elt_property (break_priority_scm_sym, gh_int2scm (0));
-
- // urg: "" != empty...
- String default_type = get_property ("defaultBarType", 0);
- if (default_type.length_i ())
- {
- bar_p_->type_str_ = default_type;
- }
-
- /*
- urg. Why did I implement this?
- */
- Scalar prop = get_property ("barAtLineStart", 0);
- if (prop.to_bool ())
- {
- bar_p_->set_elt_property (at_line_start_scm_sym, SCM_BOOL_T);
- }
- prop = get_property ("barSize", 0);
- if (prop.isnum_b ())
- {
- bar_p_->set_elt_property (bar_size_scm_sym,
- gh_double2scm (Real(prop)));
- }
- announce_element (Score_element_info (bar_p_, bar_req_l_));
- }
+ bar_ = 0;
}
-/**
- Make a barline. If there are both |: and :| requested, merge them
- to :|:.
-
-*/
void
-Bar_engraver::request_bar (String requested_type)
+Bar_engraver::create_bar ()
{
- Scalar prop = get_property ("barAtLineStart", 0);
- if (!now_mom ())
- {
- Scalar prop = get_property ("barAtLineStart", 0);
- if (!prop.to_bool ())
- return;
- }
- bool bar_existed = bar_p_;
- create_bar ();
- if (bar_existed && requested_type == "")
+ if (!bar_)
{
- return;
+ bar_ = make_item ("BarLine", SCM_EOL);
+ SCM gl = get_property ("whichBar");
+ if (scm_equal_p (gl, bar_->get_property ("glyph")) != SCM_BOOL_T)
+ bar_->set_property ("glyph", gl);
}
- else if (((requested_type == "|:") && (bar_p_->type_str_ == ":|"))
- || ((requested_type == ":|") && (bar_p_->type_str_ == "|:")))
- bar_p_->type_str_ = ":|:";
- else
- bar_p_->type_str_ = requested_type;
}
-void
-Bar_engraver::do_creation_processing ()
+void
+Bar_engraver::finalize ()
{
- create_bar ();
- bar_p_->type_str_ = "";
+ typeset_bar ();
}
+/*
+ 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::do_removal_processing ()
+Bar_engraver::process_acknowledged ()
{
- if (bar_p_)
- {
- typeset_element (bar_p_);
- bar_p_ =0;
- }
+ if (!bar_ && scm_is_string (get_property ("whichBar")))
+ 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 nonauto = get_property ("barNonAuto", 0);
- if (!nonauto.to_bool ())
- {
- Scalar always = get_property ("barAlways", 0);
- if ((time && !time->whole_in_measure_) || always.to_bool ())
- create_bar ();
- }
- }
-
- 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 ();
- }
-}
-
-
-void
-Bar_engraver::do_pre_move_processing()
+Bar_engraver::typeset_bar ()
{
- if (bar_p_)
- {
- typeset_element (bar_p_);
- bar_p_ =0;
- }
+ bar_ = 0;
}
+/*
+ lines may only be broken if there is a barline in all staves
+*/
void
-Bar_engraver::do_post_move_processing()
+Bar_engraver::stop_translation_timestep ()
{
- bar_req_l_ = 0;
+ if (!bar_)
+ context ()->get_score_context ()->set_property ("forbidBreak", SCM_BOOL_T);
+ else
+ typeset_bar ();
}
-
-
-ADD_THIS_TRANSLATOR(Bar_engraver);
-
-
+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",
+ /* create */ "BarLine",
+ /* accept */ "",
+ /* read */ "whichBar",
+ /* write */ "forbidBreak");
projects / lilypond.git / blobdiff