lily/axis-group-engraver.cc

   1 /*
   2   axis-group-engraver.cc --  implement Axis_group_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7  */
   8
   9 #include "spanner.hh"
  10 #include "paper-column.hh"
  11 #include "axis-group-interface.hh"
  12 #include "engraver.hh"
  13 #include "engraver-group-engraver.hh"
  14
  15 /**
  16    Put stuff in a Spanner with an Axis_group_interface.
  17    Use as last element of a context.
  18  */
  19 class Axis_group_engraver : public Engraver
  20 {
  21 protected:
  22   Spanner *staffline_;
  23   Link_array<Grob> elts_;
  24   virtual void process_music ();
  25   virtual void finalize ();
  26   virtual void acknowledge_grob (Grob_info);
  27   virtual void process_acknowledged_grobs ();
  28   virtual Spanner* get_spanner () const;
  29   virtual void add_element (Grob*) ;
  30 public:
  31 TRANSLATOR_DECLARATIONS(Axis_group_engraver );
  32 };
  33
  34
  35
  36 Axis_group_engraver::Axis_group_engraver ()
  37 {
  38   staffline_ = 0;
  39 }
  40
  41 void
  42 Axis_group_engraver::process_music ()
  43 {
  44 if (!staffline_)
  45   {
  46     staffline_ = get_spanner ();
  47
  48   Grob *  it = unsmob_grob (get_property ("currentCommandColumn"));
  49
  50   staffline_->set_bound (LEFT,it);
  51
  52   announce_grob(staffline_, SCM_EOL);
  53 }
  54 }
  55
  56 Spanner*
  57 Axis_group_engraver::get_spanner () const
  58 {
  59   return new Spanner (get_property ("VerticalAxisGroup"));
  60 }
  61
  62 /*
  63   TODO: should we junk minimumVerticalExtent/extraVerticalExtent ?
  64  */
  65
  66 void
  67 Axis_group_engraver::finalize ()
  68 {
  69   String type = get_daddy_grav ()->context_name ();
  70   SCM dims = get_property ("verticalExtent");
  71
  72   if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
  73       && gh_number_p (ly_cdr (dims)))
  74     {
  75       staffline_->set_extent (Grob::preset_extent_proc, Y_AXIS);
  76       staffline_->set_grob_property ("Y-extent", dims);
  77     }
  78
  79   dims = get_property ("minimumVerticalExtent");
  80   if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
  81       && gh_number_p (ly_cdr (dims)))
  82     staffline_->set_grob_property ("minimum-Y-extent", dims);
  83
  84   dims = get_property ("extraVerticalExtent");
  85   if (gh_pair_p (dims) && gh_number_p (ly_car (dims))
  86       && gh_number_p (ly_cdr (dims)))
  87     staffline_->set_grob_property ("extra-Y-extent", dims);
  88
  89   Grob *  it = unsmob_grob (get_property ("currentCommandColumn"));
  90
  91
  92   staffline_->set_bound (RIGHT,it);
  93
  94   typeset_grob (staffline_);
  95   staffline_ = 0;
  96 }
  97
  98 void
  99 Axis_group_engraver::acknowledge_grob (Grob_info i)
 100 {
 101   elts_.push (i.grob_);
 102 }
 103
 104 /*
 105   maybe should check if our parent is set, because we now get a
 106   cyclic parent relationship if we have two Axis_group_engravers in
 107   the context.  */
 108 void
 109 Axis_group_engraver::process_acknowledged_grobs ()
 110 {
 111   /* UGH UGH UGH */
 112   for (int i=0; i < elts_.size (); i++)
 113     {
 114       Grob *par = elts_[i]->get_parent (Y_AXIS);
 115
 116       if ((!par || !Axis_group_interface::has_interface (par))
 117           && ! elts_[i]->empty_b (Y_AXIS))
 118         add_element (elts_[i]);
 119     }
 120   elts_.clear ();
 121 }
 122
 123 void
 124 Axis_group_engraver::add_element (Grob*e)
 125 {
 126   Axis_group_interface::add_element (staffline_, e);
 127 }
 128
 129 /****************************************************************/
 130
 131 /*
 132
 133  maybenot such a good idea after all., to put class declarations in
 134  .cc
 135
 136 */
 137
 138 #include "hara-kiri-group-spanner.hh"
 139 #include "rhythmic-head.hh"
 140
 141 class Hara_kiri_engraver : public Axis_group_engraver
 142 {
 143 protected:
 144   virtual Spanner*get_spanner ()const;
 145   virtual void acknowledge_grob (Grob_info);
 146   virtual void add_element (Grob *e);
 147 public:
 148   TRANSLATOR_DECLARATIONS(Hara_kiri_engraver);
 149 };
 150
 151 void
 152 Hara_kiri_engraver::add_element (Grob*e)
 153 {
 154   Hara_kiri_group_spanner::add_element (staffline_, e);
 155 }
 156
 157
 158 Spanner*
 159 Hara_kiri_engraver::get_spanner () const
 160 {
 161   Spanner * sp = new Spanner (get_property ("RemoveEmptyVerticalGroup"));
 162
 163   return sp;
 164 }
 165
 166 void
 167 Hara_kiri_engraver::acknowledge_grob (Grob_info i)
 168 {
 169   Axis_group_engraver::acknowledge_grob (i);
 170   if (i.grob_->internal_has_interface (ly_symbol2scm ("rhythmic-grob-interface")))
 171     {
 172       Hara_kiri_group_spanner::add_interesting_item (staffline_, i.grob_);
 173     }
 174 }
 175
 176
 177 Hara_kiri_engraver::Hara_kiri_engraver()
 178 {
 179 }
 180
 181 ENTER_DESCRIPTION(Hara_kiri_engraver,
 182 /* descr */       "Like Axis_group_engraver, but make a hara kiri spanner, and add "
 183 "interesting items (ie. note heads, lyric syllables and normal rests) ",
 184 /* creats*/       "RemoveEmptyVerticalGroup",
 185 /* accepts */     "",
 186 /* acks  */      "grob-interface",
 187 /* reads */       "",
 188 /* write */       "");
 189
 190 ENTER_DESCRIPTION(Axis_group_engraver,
 191 /* descr */       "Group all objects created in this context in a VerticalAxisGroup spanner.",
 192 /* creats*/       "VerticalAxisGroup",
 193 /* accepts */     "",
 194 /* acks  */      "grob-interface",
 195 /* reads */       "verticalExtent minimumVerticalExtent extraVerticalExtent",
 196 /* write */       "");