2003 -> 2004

[lilypond.git] / lily / system-start-delimiter-engraver.cc

diff --git a/lily/system-start-delimiter-engraver.cc b/lily/system-start-delimiter-engraver.cc
index d8ec2aed2fa15e1996d4a7d549872c20ea7c2309..3e672d0c95f560da88694848266a160ba7ebac14 100644 (file)
--- a/lily/system-start-delimiter-engraver.cc
+++ b/lily/system-start-delimiter-engraver.cc
@@ -3,95 +3,96 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 
-
 #include "system-start-delimiter.hh"
 #include "engraver.hh"
 #include "staff-symbol.hh"
 #include "group-interface.hh"
 #include "paper-column.hh"
 #include "paper-def.hh"
+#include "spanner.hh"
 
-/*
-  TODO: rename this to system-open-engraver (or whatever.)
-
- */
 class System_start_delimiter_engraver : public Engraver
 {
 public:
-  VIRTUAL_COPY_CONS(Translator);
-  System_start_delimiter_engraver();
+  TRANSLATOR_DECLARATIONS(System_start_delimiter_engraver);
 
-  Spanner * spanbar_;
 protected:
-
-  virtual void acknowledge_element (Score_element_info);
-  virtual void do_creation_processing ();
-  virtual void do_removal_processing ();
+  Spanner * delim_;
+  virtual void acknowledge_grob (Grob_info);
+  virtual void process_music ();
+  virtual void finalize ();
 };
 
-ADD_THIS_TRANSLATOR(System_start_delimiter_engraver);
 
 
 void
-System_start_delimiter_engraver::acknowledge_element (Score_element_info inf)
+System_start_delimiter_engraver::acknowledge_grob (Grob_info inf)
 {
-  if (dynamic_cast<Staff_symbol*> (inf.elem_l_))
+  if (Staff_symbol::has_interface (inf.grob_))
     {
       /*
-       don't add as Axis_group_interface (spanbar_).add_element (),
+       don't add as Axis_group_interface::add_element (delim_,),
        because that would set the parent as well */
          
-      Group_interface (spanbar_).add_element (inf.elem_l_);
+      Pointer_group_interface::add_grob (delim_, ly_symbol2scm ("elements"),  inf.grob_);
     }
-  else if (System_start_delimiter * b = dynamic_cast<System_start_delimiter *> (inf.elem_l_))
+  else if (System_start_delimiter::has_interface (inf.grob_))
     {
-      SCM gl = b->get_elt_property ("glyph");
-      SCM my_gl = get_property ("spanBarGlyph");
+      SCM gl = inf.grob_->get_grob_property ("glyph");
+      SCM my_gl = delim_->get_grob_property ("glyph");
 
       /*
        UGH UGH
        */
-      if (gh_symbol_p (gl) && gl  == ly_symbol2scm ("brace")
-         && gh_symbol_p (my_gl) && my_gl == ly_symbol2scm ("bracket"))
-       b->translate_axis ( -paper_l ()->get_var ("interline"), X_AXIS); // ugh
+      if (gh_string_p (gl) && gh_equal_p (gl, scm_makfrom0str  ("brace"))
+         && gh_string_p (my_gl) && gh_equal_p (my_gl, scm_makfrom0str  ("bracket")))
+       inf.grob_->translate_axis (-0.8, X_AXIS); // ugh
+      else if (gh_string_p (gl) && gh_equal_p (gl, scm_makfrom0str  ("bracket"))
+              && gh_string_p (my_gl) && gh_equal_p (my_gl, scm_makfrom0str  ("bracket")))
+       {
+         inf.grob_->translate_axis ( -0.8, X_AXIS); // ugh
+         inf.grob_->set_grob_property ("arch-height",
+                                      gh_double2scm (gh_scm2double(inf.grob_->get_grob_property
+                                       ("arch-height"))+0.5));
+       }
     }
-
 }
 
-System_start_delimiter_engraver::System_start_delimiter_engraver()
+System_start_delimiter_engraver::System_start_delimiter_engraver ()
 {
-  spanbar_ = 0;
+  delim_ = 0;
 }
 
 void
-System_start_delimiter_engraver::do_creation_processing()
+System_start_delimiter_engraver::process_music ()
 {
-  spanbar_ = new System_start_delimiter;
-  spanbar_->set_bound (LEFT, get_staff_info ().command_pcol_l ());
-  announce_element (Score_element_info (spanbar_,0));
-}
+  if (!delim_)
+    {
+      SCM delim_name =get_property ("systemStartDelimiter");
+      delim_ = internal_make_spanner (delim_name);
 
+      delim_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
+      announce_grob (delim_, SCM_EOL);
+    }
+}
 void
-System_start_delimiter_engraver::do_removal_processing ()
+System_start_delimiter_engraver::finalize ()
 {
-  SCM s = get_property ("systemStartDelimiterGlyph");
-  if (gh_symbol_p (s))
+  if (delim_)
     {
-      spanbar_->set_elt_property ("glyph", s);
+      delim_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+      typeset_grob (delim_);
     }
-
-  // ugh, should have naming without bracket
-  SCM collapse = get_property ("bracketCollapseHeight");
-  if (gh_number_p (collapse))
-    spanbar_->set_elt_property ("collapse-height", collapse);
-  else
-    spanbar_->set_elt_property ("collapse-height", gh_double2scm (1));
-      
-  spanbar_->set_bound (RIGHT, get_staff_info ().command_pcol_l ());
-  typeset_element (spanbar_);
 }
 
+ENTER_DESCRIPTION(System_start_delimiter_engraver,
+/* descr */       "Creates a system start delimiter (ie. SystemStart@{Bar,Brace,Bracket@} spanner",
+/* creats*/       "SystemStartBar SystemStartBrace SystemStartBracket",
+/* accepts */     "",
+/* acks  */      "system-start-delimiter-interface staff-symbol-interface",
+/* reads */       "systemStartDelimiter",
+/* write */       "");