lily/mark-engraver.cc

   1 /*
   2   mark-engraver.cc -- implement Mark_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--2001 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include <ctype.h>
  10 #include "bar.hh"
  11 #include "command-request.hh"
  12 #include "staff-symbol.hh"
  13 #include "engraver-group-engraver.hh"
  14 #include "engraver.hh"
  15 #include "lily-guile.hh"
  16 #include "paper-column.hh"
  17 #include "paper-def.hh"
  18
  19 #include "side-position-interface.hh"
  20 #include "staff-symbol-referencer.hh"
  21 #include "item.hh"
  22 #include "group-interface.hh"
  23
  24 /**
  25   put stuff over or next to  bars.  Examples: bar numbers, marginal notes,
  26   rehearsal marks.
  27  */
  28 class Mark_engraver : public Engraver
  29 {
  30 public:
  31   VIRTUAL_COPY_CONS (Translator);
  32   Mark_engraver ();
  33 protected:
  34   Item* text_p_;
  35
  36 protected:
  37   virtual void stop_translation_timestep ();
  38   virtual void acknowledge_grob (Grob_info);
  39   void create_items (Request*);
  40   virtual bool try_music (Music *req_l);
  41   virtual void start_translation_timestep ();
  42   virtual void initialize ();
  43   virtual void process_music ();
  44
  45 private:
  46   Mark_req * mark_req_l_;
  47 };
  48
  49
  50 ADD_THIS_TRANSLATOR (Mark_engraver);
  51
  52
  53 Mark_engraver::Mark_engraver ()
  54 {
  55   text_p_ =0;
  56   mark_req_l_ = 0;
  57 }
  58
  59 void
  60 Mark_engraver::initialize ()
  61 {
  62   daddy_trans_l_->set_property ("staffsFound", SCM_EOL); // ugh: sharing with barnumber grav.
  63 }
  64
  65
  66 void
  67 Mark_engraver::acknowledge_grob (Grob_info inf)
  68 {
  69   Grob * s = inf.elem_l_;
  70   if (Staff_symbol::has_interface (s)
  71       || to_boolean (s->get_grob_property ("invisible-staff")))
  72     {
  73       SCM sts = get_property ("staffsFound");
  74       SCM thisstaff = inf.elem_l_->self_scm ();
  75       if (scm_memq (thisstaff, sts) == SCM_BOOL_F)
  76         daddy_trans_l_->set_property ("staffsFound", gh_cons (thisstaff, sts));
  77     }
  78   else if (text_p_ && Bar::has_interface (s))
  79     {
  80       /*
  81         Ugh. Figure out how to do this right at beginning of line, (without
  82         creating class Bar_script : public Item).
  83       */
  84       text_p_->set_parent (s, X_AXIS);
  85     }
  86 }
  87
  88 void
  89 Mark_engraver::stop_translation_timestep ()
  90 {
  91   if (text_p_)
  92     {
  93       text_p_->set_grob_property ("side-support-elements" , get_property ("staffsFound"));
  94       typeset_grob (text_p_);
  95       text_p_ =0;
  96     }
  97 }
  98
  99
 100 void
 101 Mark_engraver::create_items (Request *rq)
 102 {
 103   if (text_p_)
 104     return;
 105
 106   SCM s = get_property ("RehearsalMark");
 107   text_p_ = new Item (s);
 108
 109
 110   Side_position_interface::set_axis (text_p_, Y_AXIS);
 111
 112   announce_grob (text_p_, rq);
 113 }
 114
 115
 116 void
 117 Mark_engraver::start_translation_timestep ()
 118 {
 119   mark_req_l_ = 0;
 120 }
 121
 122
 123 bool
 124 Mark_engraver::try_music (Music* r_l)
 125 {
 126   if (Mark_req *mr = dynamic_cast <Mark_req *> (r_l))
 127     {
 128       if (mark_req_l_ && mr->equal_b (mark_req_l_))
 129         return true;
 130       if (mark_req_l_)
 131         return false;
 132       mark_req_l_ = mr;
 133       return true;
 134     }
 135   return false;
 136 }
 137
 138
 139 /*
 140
 141   TODO: make the increment function in Scheme.
 142
 143 */
 144 void
 145 Mark_engraver::process_music ()
 146 {
 147   if (mark_req_l_)
 148     {
 149       create_items (mark_req_l_);
 150
 151       String t;
 152
 153       /*
 154         automatic marks.
 155        */
 156
 157       SCM m = mark_req_l_->get_mus_property ("label");
 158       if (gh_pair_p (m)) // markup text
 159         text_p_->set_grob_property ("text",m);
 160       else
 161         {
 162           if (!gh_string_p (m))
 163             m =  get_property ("rehearsalMark");
 164           ;
 165
 166           if (gh_number_p (m))
 167             {
 168               int mark_count = gh_scm2int (m);
 169               t = to_str (mark_count);
 170               mark_count ++;
 171               m = gh_int2scm (mark_count);
 172             }
 173           else if (gh_string_p (m))
 174             {
 175               t = ly_scm2string (m);
 176               String next;
 177               if (t.length_i ())
 178                 {
 179                   char c = t[0];
 180                   c++;
 181                   next = to_str (c);
 182                 }
 183               m = ly_str02scm (next.ch_C ());
 184             }
 185           else
 186             {
 187               m = gh_int2scm (1);
 188             }
 189
 190           daddy_trans_l_->set_property ("rehearsalMark", m);
 191
 192           text_p_->set_grob_property ("text",
 193                                       ly_str02scm (t.ch_C ()));
 194
 195           String style = "mark";
 196           for (int i=0; i < t.length_i (); i++)
 197             {
 198               if (!isdigit (t[i]))
 199                 {
 200                   style = "large";
 201                   break;
 202                 }
 203             }
 204           SCM st = ly_symbol2scm (style.ch_C ());
 205           text_p_->set_grob_property ("font-style",  st);
 206         }
 207
 208     }
 209 }
 210