lily/score-engraver.cc

   1 /*
   2   score-engraver.cc -- implement Score_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "debug.hh"
  10
  11 #include "line-of-score.hh"
  12 #include "item.hh"
  13 #include "score-engraver.hh"
  14 #include "paper-score.hh"
  15 #include "musical-request.hh"
  16 #include "paper-column.hh"
  17 #include "command-request.hh"
  18 #include "paper-def.hh"
  19 #include "axis-group-interface.hh"
  20
  21 Score_engraver::Score_engraver()
  22 {
  23   scoreline_l_ =0;
  24   command_column_l_ =0;
  25   musical_column_l_ =0;
  26   breaks_i_ =0;
  27   pscore_p_ = 0;
  28 }
  29
  30 void
  31 Score_engraver::prepare (Moment w)
  32 {
  33   Global_translator::prepare (w);
  34
  35   SCM props = get_property (ly_symbol2scm ("basicPaperColumnProperties"));
  36   set_columns (new Paper_column (props),  new Paper_column (props));
  37
  38   command_column_l_->set_elt_property ("when", w.make_scm());
  39   musical_column_l_->set_elt_property ("when", w.make_scm());
  40   command_column_l_->set_elt_property ("breakable", SCM_BOOL_T);
  41
  42   Score_element_info i1(command_column_l_, 0), i2 (musical_column_l_,0);
  43
  44   i1.origin_trans_l_ = this;
  45   i2.origin_trans_l_ = this;
  46   announce_element (i1);
  47   announce_element (i2);
  48
  49   post_move_processing();
  50 }
  51
  52 void
  53 Score_engraver::finish()
  54 {
  55   if ((breaks_i_%8))
  56     progress_indication ("[" + to_str ( breaks_i_) + "]");
  57
  58   check_removal();
  59   removal_processing();
  60 }
  61
  62 /*
  63   use start/finish?
  64  */
  65 void
  66 Score_engraver::do_creation_processing ()
  67 {
  68   scoreline_l_ = pscore_p_->line_l_;
  69
  70   scoreline_l_->set_bound(LEFT, command_column_l_);
  71
  72   command_column_l_->set_elt_property ("breakable", SCM_BOOL_T);
  73
  74   Engraver_group_engraver::do_creation_processing();
  75 }
  76
  77
  78 void
  79 Score_engraver::do_removal_processing()
  80 {
  81   Engraver_group_engraver::do_removal_processing();
  82   scoreline_l_->set_bound(RIGHT,command_column_l_);
  83   command_column_l_->set_elt_property ("breakable", SCM_BOOL_T);
  84
  85   typeset_all ();
  86
  87   set_columns (0,0);
  88 }
  89
  90 void
  91 Score_engraver::process()
  92 {
  93   process_music();
  94   do_announces();
  95   pre_move_processing();
  96   check_removal();
  97 }
  98
  99 void
 100 Score_engraver::announce_element (Score_element_info info)
 101 {
 102   announce_info_arr_.push (info);
 103   pscore_p_->line_l_->typeset_element (info.elem_l_);
 104 }
 105
 106 /* All elements are propagated to the top upon announcement. If
 107    something was created during one run of
 108    Engraver_group_engraver::do_announces, then
 109    announce_info_arr_.size() will be nonzero again
 110 */
 111 /* junkme? Done by Engraver_group_engraver::do_announces ()?
 112  */
 113
 114 void
 115 Score_engraver::do_announces()
 116 {
 117   while (announce_info_arr_.size())
 118     Engraver_group_engraver::do_announces();
 119 }
 120
 121
 122 void
 123 Score_engraver::typeset_element (Score_element *elem_p)
 124 {
 125   elem_p_arr_.push (elem_p);
 126 }
 127
 128
 129 void
 130 Score_engraver::typeset_all()
 131 {
 132   for  (int i =0; i < elem_p_arr_.size(); i++)
 133     {
 134       Score_element * elem_p = elem_p_arr_[i];
 135       elem_p->add_processing ();
 136
 137
 138       if (Spanner *s = dynamic_cast <Spanner *> (elem_p))
 139         {
 140             /*
 141             do something sensible if spanner not
 142             spanned on 2 items.
 143            */
 144           Direction d = LEFT;
 145           do {
 146             if (!s->get_bound (d))
 147               {
 148                 s->set_bound(d, command_column_l_);
 149                 ::warning (_f ("unbound spanner `%s'", s->name().ch_C()));
 150               }
 151           } while (flip(&d) != LEFT);
 152         }
 153       else
 154         {
 155           if (!elem_p->parent_l (X_AXIS))
 156             {
 157               bool br = to_boolean (elem_p->get_elt_property ("breakable"));
 158               Axis_group_interface::add_element (br ? command_column_l_ : musical_column_l_, elem_p);
 159
 160             }
 161         }
 162       if (!elem_p->parent_l(Y_AXIS))
 163         Axis_group_interface::add_element (scoreline_l_, elem_p);
 164     }
 165   elem_p_arr_.clear();
 166 }
 167
 168 void
 169 Score_engraver::do_pre_move_processing()
 170 {
 171   // this generates all items.
 172   Engraver_group_engraver::do_pre_move_processing();
 173
 174   typeset_all();
 175   if (to_boolean (command_column_l_->get_elt_property ("breakable")))
 176     {
 177       breaks_i_ ++;
 178       if (! (breaks_i_%8))
 179         progress_indication ("[" + to_str ( breaks_i_) + "]");
 180     }
 181 }
 182
 183 void
 184 Score_engraver::set_columns (Paper_column *new_command_l,
 185                              Paper_column *new_musical_l)
 186 {
 187   Paper_column * news[] = {new_command_l, new_musical_l};
 188   Paper_column **current[] = {&command_column_l_, &musical_column_l_};
 189
 190   for (int i=00; i< 2; i++)
 191     {
 192       if (*current[i])
 193         {
 194           scoreline_l_->add_column ((*current[i]));
 195 #if 0
 196           /*
 197             TODO: delay this decision.
 198            */
 199           if (!Paper_column::used_b (*current[i]))
 200             {
 201               (*current[i])->suicide ();
 202               *current[i]  =0;
 203             }
 204 #endif
 205         }
 206       if (news[i])
 207         *current[i] = news[i];
 208     }
 209
 210   if (new_musical_l)
 211     set_property ("currentMusicalColumn", new_musical_l->self_scm ());
 212   if (new_command_l)
 213     set_property ("currentCommandColumn", new_command_l->self_scm ());
 214 }
 215
 216 Music_output*
 217 Score_engraver::get_output_p ()
 218 {
 219   Music_output * o = pscore_p_;
 220   pscore_p_=0;
 221   return o;
 222 }
 223
 224 bool
 225 Score_engraver::do_try_music (Music*r)
 226 {
 227   bool gotcha = Engraver_group_engraver::do_try_music (r);
 228
 229   if (!gotcha)
 230     {
 231       if (Break_req* b = dynamic_cast<Break_req *> (r))
 232         {
 233           gotcha = true;
 234
 235
 236           SCM pen = command_column_l_->get_elt_property  ("penalty");
 237           Real total_penalty = gh_number_p (pen)
 238             ? gh_scm2double(pen)
 239             : 0.0;
 240
 241           total_penalty += b->penalty_f_;
 242           if (b->penalty_f_ > 10000.0) //  ugh. arbitrary.
 243             forbid_breaks ();
 244
 245           command_column_l_->set_elt_property ("penalty",
 246                                                gh_double2scm (total_penalty));
 247         }
 248     }
 249    return gotcha;
 250 }
 251
 252 void
 253 Score_engraver::forbid_breaks ()
 254 {
 255   /*
 256     result is junked.
 257    */
 258   command_column_l_->remove_elt_property ("breakable");
 259 }
 260
 261 ADD_THIS_TRANSLATOR(Score_engraver);
 262
 263 void
 264 Score_engraver::do_add_processing ()
 265 {
 266   Translator_group::do_add_processing ();
 267   assert (dynamic_cast<Paper_def *> (output_def_l_));
 268   assert (!daddy_trans_l_);
 269   pscore_p_ = new Paper_score;
 270   pscore_p_->paper_l_ = dynamic_cast<Paper_def*>(output_def_l_);
 271
 272   SCM props = get_property(ly_symbol2scm ("basicLineOfScoreProperties"));
 273
 274   pscore_p_->typeset_line (new Line_of_score (props));
 275 }
 276