source file of the GNU LilyPond music typesetter
- (c) 1997, 1998, 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "bar-engraver.hh"
-#include "staff-bar.hh"
+#include "bar.hh"
+#include "score-engraver.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"
+#include "engraver.hh"
+
+/**
+ generate bars. Either user ("|:"), or default (new measure)
+ */
+class Bar_engraver : public Engraver
+{
+public:
+ Bar_engraver();
+ VIRTUAL_COPY_CONS(Translator);
+ void request_bar (String type_str);
+
+protected:
+ virtual void do_creation_processing ();
+ virtual void do_removal_processing ();
+ virtual void do_process_music();
+ virtual void do_pre_move_processing();
+
+private:
+ void typeset_bar ();
+ void create_bar ();
+
+ Item * bar_p_;
+};
Bar_engraver::Bar_engraver()
{
do_post_move_processing();
}
-bool
-Bar_engraver::do_try_music (Music*r_l)
-{
- 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::create_bar ()
{
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;
- }
+ bar_p_ = new Item (get_property ("basicBarProperties"));
- /*
- 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);
- }
- announce_element (Score_element_info (bar_p_, bar_req_l_));
- }
-}
-
-void
-Bar_engraver::request_bar (String type_str)
-{
- Scalar prop = get_property ("barAtLineStart", 0);
- if (!now_mom ())
- {
- Scalar prop = get_property ("barAtLineStart", 0);
- if (!prop.to_bool ())
- return;
+ SCM gl = get_property ("whichBar");
+ if (scm_equal_p (gl, bar_p_->get_elt_property ("glyph")) != SCM_BOOL_T)
+ bar_p_->set_elt_property ("glyph", gl);
+
+ announce_element (bar_p_, 0);
}
- 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;
}
void
Bar_engraver::do_creation_processing ()
{
- create_bar ();
- bar_p_->type_str_ = "";
}
void
Bar_engraver::do_removal_processing ()
{
- if (bar_p_)
- {
- typeset_element (bar_p_);
- bar_p_ =0;
- }
+ typeset_bar ();
}
+/*
+ Bar_engraver should come *after* any engravers that expect bars to
+ modify whichBar in do_process_music () be typeset
+*/
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 ())
+Bar_engraver::do_process_music()
+{
+ SCM b =get_property ("whichBar");
+ if (gh_string_p (b))
{
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_)
- {
- Break_req r;
- r.penalty_i_ = Break_req::DISALLOW;
- daddy_grav_l ()->try_music (&r);
}
}
-
-void
-Bar_engraver::do_pre_move_processing()
+void
+Bar_engraver::typeset_bar ()
{
if (bar_p_)
{
}
}
-void
-Bar_engraver::do_post_move_processing()
+/*
+ lines may only be broken if there is a barline in all staffs
+*/
+void
+Bar_engraver::do_pre_move_processing()
{
- bar_req_l_ = 0;
-}
-
+ 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 (); // guh. Use properties!
+ }
+ else
+ typeset_bar ();
+}
ADD_THIS_TRANSLATOR(Bar_engraver);
-
-