lily/dynamic-engraver.cc

   1 /*
   2   dynamic-reg.cc -- implement Dynamic_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include "debug.hh"
   9 #include "crescendo.hh"
  10 #include "musical-request.hh"
  11 #include "lookup.hh"
  12 #include "paper-def.hh"
  13 #include "score-column.hh"
  14 #include "staff-symbol.hh"
  15 #include "note-column.hh"
  16 #include "text-item.hh"
  17 #include "staff-side.hh"
  18 #include "engraver.hh"
  19 #include "stem.hh"
  20 #include "note-head.hh"
  21
  22 /**
  23    print text & hairpin dynamics.
  24  */
  25 class Dynamic_engraver : public Engraver
  26 {
  27   Text_item * text_p_;
  28   Crescendo * to_end_cresc_p_;
  29   Crescendo * cresc_p_;
  30
  31   Span_req * cresc_req_l_;
  32   Array<Request*> dynamic_req_l_arr_;
  33   void  typeset_all ();
  34 public:
  35   VIRTUAL_COPY_CONS(Translator);
  36   Dynamic_engraver();
  37
  38 protected:
  39   virtual void do_removal_processing ();
  40   virtual void acknowledge_element (Score_element_info);
  41   virtual bool do_try_music (Music *req_l);
  42   virtual void do_process_requests();
  43   virtual void do_pre_move_processing();
  44   virtual void do_post_move_processing();
  45 };
  46
  47
  48
  49 Dynamic_engraver::Dynamic_engraver()
  50 {
  51   do_post_move_processing();
  52   text_p_ =0;
  53
  54   to_end_cresc_p_ = cresc_p_ = 0;
  55
  56   cresc_req_l_ = 0;
  57 }
  58
  59 void
  60 Dynamic_engraver::do_post_move_processing()
  61 {
  62   dynamic_req_l_arr_.clear();
  63 }
  64
  65 bool
  66 Dynamic_engraver::do_try_music (Music * m)
  67 {
  68   Request * r = dynamic_cast<Request*> (m);
  69
  70   if(Text_script_req * d = dynamic_cast <Text_script_req *> (r))
  71     {
  72       if (d->style_str_ != "dynamic")
  73         return false;
  74     }
  75   else if (Span_req * s =  dynamic_cast <Span_req*> (r))
  76     {
  77       if (s-> span_type_str_ != "crescendo"
  78           && s->span_type_str_ != "decrescendo")
  79         return false;
  80     }
  81   else
  82     return false;
  83
  84   for (int i=0; i < dynamic_req_l_arr_.size (); i++)
  85     if (r->equal_b (dynamic_req_l_arr_[i]))
  86       return true;
  87
  88   dynamic_req_l_arr_.push (r);
  89   return true;
  90 }
  91
  92
  93 void
  94 Dynamic_engraver::do_process_requests()
  95 {
  96   Crescendo*  new_cresc_p=0;
  97
  98   for (int i=0; i < dynamic_req_l_arr_.size(); i++)
  99     {
 100       if (Text_script_req *absd =
 101           dynamic_cast<Text_script_req *> ( dynamic_req_l_arr_[i]))
 102         {
 103           if (text_p_)
 104             {
 105               dynamic_req_l_arr_[i]->warning (_("Got a dynamic already.  Continuing dazed and confused."));
 106               continue;
 107             }
 108
 109           String loud = absd->text_str_;
 110
 111           text_p_ = new Text_item;
 112           text_p_->text_str_ =  loud; // ugh
 113           text_p_->set_elt_property ("style", gh_str02scm ("dynamic"));
 114           text_p_->set_elt_property ("script-priority",
 115                                      gh_int2scm (100));
 116           Staff_sidify (text_p_).set_axis (Y_AXIS);
 117
 118
 119           if (absd->get_direction ())
 120             {
 121               text_p_->set_elt_property ("direction", gh_int2scm (absd->get_direction ()));
 122             }
 123
 124
 125           /*
 126             UGH UGH
 127            */
 128           SCM prop = get_property ("dynamicDirection", 0);
 129           if (!isdir_b (prop))
 130             {
 131               prop = get_property ("verticalDirection", 0);
 132             }
 133
 134           if (isdir_b (prop) && to_dir (prop))
 135             text_p_->set_elt_property ("direction", prop);
 136
 137
 138           prop = get_property ("dynamicPadding", 0);
 139           if (gh_number_p(prop))
 140             {
 141               text_p_->set_elt_property ("padding", prop);
 142             }
 143           announce_element (Score_element_info (text_p_, absd));
 144         }
 145       else if (Span_req *span_l
 146                = dynamic_cast <Span_req *> (dynamic_req_l_arr_[i]))
 147         {
 148           if (span_l->span_dir_ == STOP)
 149             {
 150               if (!cresc_p_)
 151                 {
 152                   span_l->warning (_ ("Can't find (de)crescendo to end"));
 153                 }
 154               else
 155                 {
 156                   assert (!to_end_cresc_p_);
 157                   to_end_cresc_p_ =cresc_p_;
 158
 159                   cresc_p_ = 0;
 160                 }
 161             }
 162           else if (span_l->span_dir_ == START)
 163             {
 164               cresc_req_l_ = span_l;
 165               assert (!new_cresc_p);
 166               new_cresc_p  = new Crescendo;
 167               new_cresc_p->grow_dir_ = (span_l->span_type_str_ == "crescendo")  ? BIGGER : SMALLER;
 168
 169               Staff_sidify (new_cresc_p).set_axis (Y_AXIS);
 170               announce_element (Score_element_info (new_cresc_p, span_l));
 171             }
 172         }
 173     }
 174
 175   if (new_cresc_p)
 176     {
 177       if (cresc_p_)
 178         {
 179           ::warning (_ ("Too many crescendi here"));
 180           typeset_element (cresc_p_);
 181
 182           cresc_p_ = 0;
 183         }
 184
 185       cresc_p_ = new_cresc_p;
 186       cresc_p_->set_bounds(LEFT,get_staff_info().musical_pcol_l ());
 187
 188       if (text_p_)
 189         {
 190           cresc_p_->dyn_b_drul_[LEFT] = true;
 191           if (to_end_cresc_p_)
 192             to_end_cresc_p_->dyn_b_drul_[RIGHT] = true;
 193         }
 194     }
 195 }
 196
 197 void
 198 Dynamic_engraver::do_pre_move_processing()
 199 {
 200   typeset_all ();
 201 }
 202
 203
 204
 205 ADD_THIS_TRANSLATOR(Dynamic_engraver);
 206
 207 void
 208 Dynamic_engraver::do_removal_processing ()
 209 {
 210   if (cresc_p_)
 211     {
 212       typeset_element (cresc_p_ );
 213       cresc_req_l_->warning (_ ("unended crescendo"));
 214       cresc_p_ =0;
 215     }
 216   typeset_all ();
 217 }
 218
 219
 220 void
 221 Dynamic_engraver::typeset_all ()
 222 {
 223   if (to_end_cresc_p_)
 224     {
 225       to_end_cresc_p_->set_bounds(RIGHT,get_staff_info().musical_pcol_l ());
 226
 227       typeset_element (to_end_cresc_p_);
 228
 229       to_end_cresc_p_ =0;
 230
 231     }
 232
 233   if (text_p_)
 234     {
 235       typeset_element (text_p_);
 236       text_p_ =0;
 237     }
 238 }
 239
 240
 241 void
 242 Dynamic_engraver::acknowledge_element (Score_element_info i)
 243 {
 244   if (dynamic_cast<Stem *> (i.elem_l_)
 245       || dynamic_cast<Note_head *> (i.elem_l_)
 246       )
 247     {
 248       if (text_p_)
 249         Staff_sidify (text_p_).add_support (i.elem_l_);
 250
 251       if (to_end_cresc_p_)
 252         Staff_sidify (to_end_cresc_p_).add_support (i.elem_l_);
 253
 254       if (cresc_p_)
 255         Staff_sidify(cresc_p_).add_support (i.elem_l_);
 256     }
 257 }
 258