lily/extender-engraver.cc

   1 /*
   2   extender-engraver.cc -- implement Extender_engraver
   3
   4   (c) 1998--1999 Jan Nieuwenhuizen <janneke@gnu.org>
   5 */
   6
   7 #include "proto.hh"
   8 #include "musical-request.hh"
   9 #include "extender-engraver.hh"
  10 #include "extender-spanner.hh"
  11 #include "score-column.hh"
  12 #include "text-item.hh"
  13
  14 ADD_THIS_TRANSLATOR (Extender_engraver);
  15
  16 Extender_engraver::Extender_engraver ()
  17 {
  18   extender_spanner_p_ = 0;
  19   req_l_ = 0;
  20 }
  21
  22 void
  23 Extender_engraver::acknowledge_element (Score_element_info i)
  24 {
  25   if (Text_item* t = dynamic_cast<Text_item*> (i.elem_l_))
  26     {
  27       Rhythmic_req * rh = dynamic_cast<Rhythmic_req*>  (i.req_l_);
  28       if (!rh)
  29         return;
  30
  31       now_lyrics_.push (Text_lyric_tuple (t, rh, now_mom () + rh->length_mom ()));
  32       /*
  33         UGH.  What do we do in case of multiple alternatives?
  34        */
  35       if (extender_spanner_p_
  36           && !extender_spanner_p_->spanned_drul_[RIGHT]
  37             )
  38           {
  39             extender_spanner_p_->set_textitem (RIGHT, t);
  40           }
  41     }
  42 }
  43
  44
  45 bool
  46 Extender_engraver::do_try_music (Music* req_l)
  47 {
  48   if (Extender_req* p = dynamic_cast <Extender_req *> (req_l))
  49     {
  50       if (req_l_)
  51         return false;
  52
  53       req_l_ = p;
  54       return true;
  55     }
  56   return false;
  57 }
  58
  59 void
  60 Extender_engraver::do_removal_processing ()
  61 {
  62   if (extender_spanner_p_)
  63     {
  64       req_l_->warning (_ ("unterminated extender"));
  65       extender_spanner_p_->set_bounds(RIGHT, get_staff_info ().command_pcol_l ());
  66     }
  67 }
  68
  69 void
  70 Extender_engraver::do_process_requests ()
  71 {
  72   Array<Text_lyric_tuple> stopped_texts;
  73   Moment now = now_mom ();
  74
  75   stopped_texts.clear ();
  76   while (past_lyrics_pq_.size ()
  77          && past_lyrics_pq_.front ().end_ == now)
  78     stopped_texts.push (past_lyrics_pq_.get ());
  79
  80   if (req_l_)
  81     {
  82       if (!stopped_texts.size ())
  83         {
  84           req_l_->warning ("Nothing to connect extender to on the left. Ignoring extender request");
  85           return;
  86         }
  87
  88       extender_spanner_p_ = new Extender_spanner;
  89       extender_spanner_p_->set_textitem  (LEFT, stopped_texts[0].text_l_);
  90       announce_element (Score_element_info (extender_spanner_p_, req_l_));
  91     }
  92 }
  93
  94
  95 void
  96 Extender_engraver::do_pre_move_processing ()
  97 {
  98   for (int i=0; i < now_lyrics_.size (); i++)
  99     {
 100       past_lyrics_pq_.insert (now_lyrics_[i]);
 101     }
 102   now_lyrics_.clear ();
 103
 104   if (extender_spanner_p_)
 105     {
 106       typeset_element (extender_spanner_p_);
 107       extender_spanner_p_ = 0;
 108     }
 109 }
 110 void
 111 Extender_engraver::do_post_move_processing ()
 112 {
 113   Moment now = now_mom ();
 114   while (past_lyrics_pq_.size () && past_lyrics_pq_.front ().end_ < now)
 115     past_lyrics_pq_.delmin ();
 116
 117   req_l_ =0;
 118 }
 119
 120 /**********************************************************************/
 121 Text_lyric_tuple::Text_lyric_tuple ()
 122 {
 123   text_l_ =0;
 124   req_l_ =0;
 125   end_ = 0;
 126 }
 127
 128 Text_lyric_tuple::Text_lyric_tuple (Text_item *h, Rhythmic_req*m, Moment mom)
 129 {
 130   text_l_ = h;
 131   req_l_ = m;
 132   end_ = mom;
 133 }
 134
 135
 136 int
 137 Text_lyric_tuple::time_compare (Text_lyric_tuple const&h1,
 138                              Text_lyric_tuple const &h2)
 139 {
 140   return (h1.end_ - h2.end_ ).sign ();
 141 }