lily/system-start-delimiter-engraver.cc

   1 /*
   2   system-start-delimiter-engraver.cc -- implement System_start_delimiter_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "system-start-delimiter.hh"
  10 #include "engraver.hh"
  11 #include "staff-symbol.hh"
  12 #include "pointer-group-interface.hh"
  13 #include "paper-column.hh"
  14 #include "output-def.hh"
  15 #include "spanner.hh"
  16
  17 class System_start_delimiter_engraver : public Engraver
  18 {
  19 public:
  20   TRANSLATOR_DECLARATIONS (System_start_delimiter_engraver);
  21
  22 protected:
  23   Spanner *delim_;
  24   DECLARE_ACKNOWLEDGER (system_start_delimiter);
  25   DECLARE_ACKNOWLEDGER (staff_symbol);
  26
  27   void process_music ();
  28   virtual void finalize ();
  29 };
  30
  31 void
  32 System_start_delimiter_engraver::acknowledge_staff_symbol (Grob_info inf)
  33 {
  34   /*
  35     don't add as Axis_group_interface::add_element (delim_, ),
  36     because that would set the parent as well */
  37
  38   Pointer_group_interface::add_grob (delim_, ly_symbol2scm ("elements"), inf.grob ());
  39 }
  40 void
  41 System_start_delimiter_engraver::acknowledge_system_start_delimiter (Grob_info inf)
  42 {
  43   SCM gl = inf.grob ()->get_property ("glyph");
  44   SCM my_gl = delim_->get_property ("glyph");
  45
  46   /*
  47     UGH UGH
  48   */
  49   if (scm_is_string (gl) && ly_is_equal (gl, scm_makfrom0str ("brace"))
  50       && scm_is_string (my_gl) && ly_is_equal (my_gl, scm_makfrom0str ("bracket")))
  51     inf.grob ()->translate_axis (-0.8, X_AXIS); // ugh
  52   else if (scm_is_string (gl) && ly_is_equal (gl, scm_makfrom0str ("bracket"))
  53            && scm_is_string (my_gl) && ly_is_equal (my_gl, scm_makfrom0str ("bracket")))
  54     {
  55       inf.grob ()->translate_axis (-0.8, X_AXIS); // ugh
  56     }
  57 }
  58
  59 System_start_delimiter_engraver::System_start_delimiter_engraver ()
  60 {
  61   delim_ = 0;
  62 }
  63
  64 void
  65 System_start_delimiter_engraver::process_music ()
  66 {
  67   if (!delim_)
  68     {
  69       SCM delim_name = get_property ("systemStartDelimiter");
  70       delim_ = make_spanner_from_properties (this, delim_name, SCM_EOL,
  71                                              ly_symbol2string (delim_name).to_str0 ());
  72
  73       delim_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
  74     }
  75 }
  76 void
  77 System_start_delimiter_engraver::finalize ()
  78 {
  79   if (delim_)
  80     delim_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
  81 }
  82
  83 #include "translator.icc"
  84
  85 ADD_ACKNOWLEDGER (System_start_delimiter_engraver, system_start_delimiter);
  86 ADD_ACKNOWLEDGER (System_start_delimiter_engraver, staff_symbol);
  87
  88 ADD_TRANSLATOR (System_start_delimiter_engraver,
  89                 /* doc */ "Creates a system start delimiter (ie. SystemStart@{Bar, Brace, Bracket@} spanner",
  90                 /* create */ "SystemStartBar SystemStartBrace SystemStartBracket",
  91                 /* accept */ "",
  92                 /* read */ "systemStartDelimiter",
  93                 /* write */ "");