/*
- bar-number-grav.cc -- implement Bar_number_engraver
+ bar-number-engraver.cc -- implement Bar_number_engraver
source file of the GNU LilyPond music typesetter
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "bar-number-engraver.hh"
-#include "script.hh"
-#include "text-def.hh"
+#include "lily-guile.hh"
+#include "paper-column.hh"
#include "paper-def.hh"
-#include "command-request.hh"
-#include "bar.hh"
-#include "span-bar.hh"
-#include "stem.hh"
-#include "time-description.hh"
+#include "side-position-interface.hh"
+#include "item.hh"
+#include "moment.hh"
+#include "engraver.hh"
+#include "translator-group.hh"
-Bar_number_engraver::Bar_number_engraver()
+/*
+
+TODO: detect the top staff (stavesFound), and acknowledge staff-group
+system-start-delims. If we find these, and the top staff is in the
+staff-group, add padding to the bar number.
+
+*/
+
+
+class Bar_number_engraver : public Engraver
{
- script_p_ =0;
-}
+protected:
+ Item* text_;
+protected:
+ virtual void stop_translation_timestep ();
+ virtual void acknowledge_grob (Grob_info);
+ virtual void process_music ();
+ void create_items ();
+ TRANSLATOR_DECLARATIONS(Bar_number_engraver );
+};
+
void
-Bar_number_engraver::acknowledge_element (Score_element_info i)
+Bar_number_engraver::process_music ()
{
- Bar *b =dynamic_cast <Bar *> (i.elem_l_);
- if (script_p_ || !b)
- return;
-
- /* Only put numbers on bars that are at our own level (don't put
- numbers over the staffs of a GrandStaff, only over the GrandStaff
- itself */
- if (i.origin_grav_l_arr_.size() != 1)
- return;
+ // todo include (&&!time->cadenza_b_)
- Time_description const * time = get_staff_info().time_C_;
- if (!time || time->cadenza_b_)
- return;
+ SCM wb = get_property ("whichBar");
- script_p_ = new Script;
- Text_def *td_p = new Text_def;
- td_p->text_str_ = to_str (time->bars_i_);
+ if (gh_string_p (wb))
+ {
+ SCM smp = get_property ("measurePosition");
+
+ Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
+ if (mp.main_part_ == Rational (0))
+ {
+ SCM bn = get_property ("currentBarNumber");
+ SCM proc = get_property ("barNumberVisibility");
+ if (gh_number_p (bn) && gh_procedure_p (proc)
+ && to_boolean(gh_call1(proc, bn)))
+ {
+ create_items ();
+ // guh.
+ text_->set_grob_property
+ ("text", scm_makfrom0str (to_string (gh_scm2int (bn)).to_str0 ()));
+ }
+ }
+ }
- td_p->align_dir_ = LEFT;
+}
- script_p_->dir_ = UP;
- script_p_->axis_ = Y_AXIS;
- script_p_->specs_p_ = td_p->clone ();
- script_p_->breakable_b_ = true;
- Scalar pri = get_property ("barNumberBreakPriority", 0);
- if (pri.length_i () && pri.isnum_b ())
- {
- script_p_->break_priority_i_ = int (pri);
- }
- else
- script_p_->break_priority_i_ = b->break_priority_i_;
- Scalar padding = get_property ("barScriptPadding", 0);
- if (padding.length_i() && padding.isnum_b ())
+Bar_number_engraver::Bar_number_engraver ()
+{
+ text_ =0;
+}
+
+
+void
+Bar_number_engraver::acknowledge_grob (Grob_info inf)
+{
+ Grob * s = inf.grob_;
+ if (text_
+ && dynamic_cast<Item*> (s)
+ && s->get_grob_property ("break-align-symbol") == ly_symbol2scm ("left-edge"))
{
- script_p_->padding_f_ = Real(padding);
+ /*
+ By default this would land on the Paper_column -- so why
+ doesn't it work when you leave this out? */
+ text_->set_parent (s, X_AXIS);
}
-
- announce_element (Score_element_info (script_p_,0));
}
-void
-Bar_number_engraver::do_pre_move_processing()
+void
+Bar_number_engraver::stop_translation_timestep ()
{
- if (script_p_)
+ if (text_)
{
- typeset_element (script_p_);
- script_p_ =0;
+ text_->set_grob_property ("side-support-elements", get_property ("stavesFound"));
+ typeset_grob (text_);
+ text_ =0;
}
}
-ADD_THIS_TRANSLATOR(Bar_number_engraver);
+void
+Bar_number_engraver::create_items ()
+{
+ if (text_)
+ return;
+
+ text_ = make_item ("BarNumber");
+ Side_position_interface::set_axis (text_,Y_AXIS);
+
+ announce_grob(text_, SCM_EOL);
+}
+
+ENTER_DESCRIPTION(Bar_number_engraver,
+/* descr */ "A bar number is created whenever measurePosition is zero. It is\n"
+"put on top of all staves, and appears only at left side of the staff.",
+/* creats*/ "BarNumber",
+/* accepts */ "",
+/* acks */ "break-aligned-interface",
+/* reads */ "currentBarNumber stavesFound barNumberVisibility" ,
+/* write */ "");