lily/phrasing-slur-engraver.cc

   1 /*
   2   phrasing-slur-engraver.cc -- implement Phrasing_slur_engraver
   3
   4   (c)  1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   5 */
   6
   7 #include "event.hh"
   8 #include "slur.hh"
   9 #include "warn.hh"
  10 #include "note-column.hh"
  11 #include "translator-group.hh"
  12 #include "engraver.hh"
  13 #include "spanner.hh"
  14
  15 /*
  16   TODO:
  17
  18   ALGRGRRGRG
  19
  20   Derive this from Slur_engraver. This code is completely duplicate.
  21 */
  22 class Phrasing_slur_engraver : public Engraver
  23 {
  24   Link_array<Music> eventses_;
  25   Link_array<Music> new_phrasing_slur_evs_;
  26   Link_array<Grob> phrasing_slur_l_stack_;
  27   Link_array<Grob> end_phrasing_slurs_;
  28   Moment last_start_;
  29
  30 protected:
  31   virtual bool try_music (Music*);
  32   virtual void acknowledge_grob (Grob_info);
  33   virtual void stop_translation_timestep ();
  34   virtual void start_translation_timestep ();
  35   virtual void finalize ();
  36   virtual void process_acknowledged_grobs ();
  37
  38 public:
  39   TRANSLATOR_DECLARATIONS(Phrasing_slur_engraver);
  40
  41 };
  42
  43 Phrasing_slur_engraver::Phrasing_slur_engraver ()
  44 {
  45   last_start_ = Moment (-1);
  46 }
  47
  48 bool
  49 Phrasing_slur_engraver::try_music (Music *ev)
  50 {
  51   if (ev->is_mus_type ("abort-event"))
  52     {
  53       for (int i = 0; i < phrasing_slur_l_stack_.size (); i++)
  54         {
  55           phrasing_slur_l_stack_[i]->suicide ();
  56         }
  57       phrasing_slur_l_stack_.clear ();
  58       for (int i = 0; i < end_phrasing_slurs_.size (); i++)
  59         {
  60           end_phrasing_slurs_[i]->suicide ();
  61         }
  62       end_phrasing_slurs_.clear ();
  63       eventses_.clear ();
  64       new_phrasing_slur_evs_.clear ();
  65     }
  66   else if (ev->is_mus_type ("phrasing-slur-event"))
  67     {
  68       /*
  69         Let's not start more than one phrasing slur per moment.
  70       */
  71
  72       Direction d = to_dir (ev->get_mus_property ("span-direction"));
  73
  74       if (d == START)
  75         {
  76           if (now_mom () > last_start_)
  77             {
  78               new_phrasing_slur_evs_.push (ev);
  79               last_start_ = now_mom ();
  80               return true;
  81             }
  82         }
  83       else
  84         {
  85           new_phrasing_slur_evs_.push (ev);
  86           return true;
  87         }
  88     }
  89   return false;
  90 }
  91
  92 void
  93 Phrasing_slur_engraver::acknowledge_grob (Grob_info info)
  94 {
  95   if (Note_column::has_interface (info.grob_))
  96     {
  97       Grob *e =info.grob_;
  98       for (int i = 0; i < phrasing_slur_l_stack_.size (); i++)
  99         Slur::add_column (phrasing_slur_l_stack_[i], e);
 100       for (int i = 0; i < end_phrasing_slurs_.size (); i++)
 101         Slur::add_column (end_phrasing_slurs_[i], e);
 102     }
 103 }
 104
 105 void
 106 Phrasing_slur_engraver::finalize ()
 107 {
 108   for (int i = 0; i < phrasing_slur_l_stack_.size (); i++)
 109     {
 110 #if 0
 111       typeset_grob (phrasing_slur_l_stack_[i]);
 112 #else
 113       /*
 114         Let's not typeset unterminated stuff
 115       */
 116       phrasing_slur_l_stack_[i]->suicide ();
 117 #endif
 118     }
 119   phrasing_slur_l_stack_.clear ();
 120
 121   for (int i=0; i < eventses_.size (); i++)
 122     {
 123       eventses_[i]->origin ()->warning (_ ("unterminated phrasing slur"));
 124     }
 125 }
 126
 127 void
 128 Phrasing_slur_engraver::process_acknowledged_grobs ()
 129 {
 130   Link_array<Grob> start_phrasing_slurs;
 131   for (int i=0; i< new_phrasing_slur_evs_.size (); i++)
 132     {
 133       Music* phrasing_slur_ev = new_phrasing_slur_evs_[i];
 134       // end phrasing slur: move the phrasing slur to other array
 135
 136       Direction d = to_dir (phrasing_slur_ev->get_mus_property ("span-direction"));
 137
 138       if (d == STOP)
 139         {
 140           if (phrasing_slur_l_stack_.empty ())
 141             phrasing_slur_ev->origin ()->warning (_f ("can't find start of phrasing slur"));
 142           else
 143             {
 144               Grob* phrasing_slur = phrasing_slur_l_stack_.pop ();
 145               end_phrasing_slurs_.push (phrasing_slur);
 146               eventses_.pop ();
 147             }
 148         }
 149       else if (d == START)
 150         {
 151           // push a new phrasing_slur onto stack.
 152           // (use temp. array to wait for all phrasing_slur STOPs)
 153           Grob* phrasing_slur = new Spanner (get_property ("PhrasingSlur"));
 154           Slur::set_interface (phrasing_slur); // can't remove.
 155
 156
 157           if (Direction updown = to_dir (phrasing_slur_ev->get_mus_property ("direction")))
 158             {
 159               phrasing_slur->set_grob_property ("direction", gh_int2scm (updown));
 160             }
 161
 162           start_phrasing_slurs.push (phrasing_slur);
 163           eventses_.push (phrasing_slur_ev);
 164           announce_grob(phrasing_slur, phrasing_slur_ev->self_scm());
 165         }
 166     }
 167   for (int i=0; i < start_phrasing_slurs.size (); i++)
 168     phrasing_slur_l_stack_.push (start_phrasing_slurs[i]);
 169   new_phrasing_slur_evs_.clear ();
 170 }
 171
 172 void
 173 Phrasing_slur_engraver::stop_translation_timestep ()
 174 {
 175   for (int i = 0; i < end_phrasing_slurs_.size (); i++)
 176     {
 177       typeset_grob (end_phrasing_slurs_[i]);
 178     }
 179   end_phrasing_slurs_.clear ();
 180 }
 181
 182 void
 183 Phrasing_slur_engraver::start_translation_timestep ()
 184 {
 185   new_phrasing_slur_evs_.clear ();
 186 }
 187
 188
 189
 190 ENTER_DESCRIPTION(Phrasing_slur_engraver,
 191 /* descr */       "Print phrasing slurs. Similar to @ref{Slur_engraver}",
 192 /* creats*/       "PhrasingSlur",
 193 /* accepts */     "phrasing-slur-event",
 194 /* acks  */       "note-column-interface",
 195 /* reads */       "",
 196 /* write */       "");