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--2000 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 #include "protected-scm.hh"
  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   Protected_scm staffs_;
  36
  37 protected:
  38   virtual void do_pre_move_processing ();
  39   virtual void acknowledge_element (Score_element_info);
  40   void create_items(Request*);
  41   virtual bool do_try_music (Music *req_l);
  42   virtual void do_process_music ();
  43   virtual void do_post_move_processing ();
  44 private:
  45   Mark_req * mark_req_l_;
  46 };
  47
  48
  49 ADD_THIS_TRANSLATOR (Mark_engraver);
  50
  51
  52 Mark_engraver::Mark_engraver ()
  53 {
  54   text_p_ =0;
  55   mark_req_l_ = 0;
  56   staffs_ = SCM_EOL;
  57 }
  58
  59
  60
  61 void
  62 Mark_engraver::acknowledge_element (Score_element_info inf)
  63 {
  64   Score_element * s = inf.elem_l_;
  65   if (Staff_symbol::has_interface (s))
  66     {
  67       staffs_ = gh_cons (inf.elem_l_->self_scm_, staffs_);
  68     }
  69   else if (text_p_ && Bar::has_interface (s))
  70     {
  71       /*
  72         Ugh. Figure out how to do this right at beginning of line, (without
  73         creating class Bar_script : public Item).
  74       */
  75       text_p_->set_parent (s, X_AXIS);
  76     }
  77 }
  78
  79 void
  80 Mark_engraver::do_pre_move_processing ()
  81 {
  82   if (text_p_)
  83     {
  84       text_p_->set_elt_property("side-support-elements" , staffs_);
  85       typeset_element (text_p_);
  86       text_p_ =0;
  87     }
  88 }
  89
  90
  91 void
  92 Mark_engraver::create_items (Request *rq)
  93 {
  94   if (text_p_)
  95     return;
  96
  97   SCM s = get_property ("basicMarkProperties");
  98   text_p_ = new Item (s);
  99
 100
 101   Side_position::set_axis (text_p_, Y_AXIS);
 102
 103   /*
 104     -> Generic props.
 105    */
 106   SCM prop = get_property ("markDirection");
 107   if (!isdir_b (prop))
 108     {
 109       prop = gh_int2scm (UP);
 110     }
 111   text_p_->set_elt_property ("direction", prop);
 112
 113   SCM padding = get_property ("markScriptPadding");
 114   if (gh_number_p(padding))
 115     {
 116       text_p_->set_elt_property ("padding", padding);
 117     }
 118   else
 119     {
 120       text_p_
 121         ->set_elt_property ("padding",
 122                             gh_double2scm(paper_l ()->get_var ("interline")));
 123     }
 124
 125
 126   announce_element (Score_element_info (text_p_, rq));
 127 }
 128
 129
 130 void
 131 Mark_engraver::do_post_move_processing ()
 132 {
 133   mark_req_l_ = 0;
 134 }
 135
 136
 137 bool
 138 Mark_engraver::do_try_music (Music* r_l)
 139 {
 140   if (Mark_req *mr = dynamic_cast <Mark_req *> (r_l))
 141     {
 142       if (mark_req_l_ && mr->equal_b (mark_req_l_))
 143         return true;
 144       if (mark_req_l_)
 145         return false;
 146       mark_req_l_ = mr;
 147       return true;
 148     }
 149   return false;
 150 }
 151
 152 void
 153 Mark_engraver::do_process_music ()
 154 {
 155   if (mark_req_l_)
 156     {
 157       create_items (mark_req_l_);
 158
 159       String t;
 160
 161       /*
 162         automatic marks.
 163        */
 164       SCM m = (mark_req_l_->mark_label_ == SCM_UNDEFINED)
 165         ? get_property ("rehearsalMark")
 166         : SCM(mark_req_l_->mark_label_);
 167
 168       if (gh_number_p (m))
 169         {
 170           int mark_count = gh_scm2int (m);
 171           t = to_str (mark_count);
 172           mark_count ++;
 173           m = gh_int2scm (mark_count);
 174         }
 175       else if (gh_string_p (m))
 176         {
 177           t = ly_scm2string (m);
 178           String next;
 179           if (t.length_i ())
 180             {
 181               char c = t[0];
 182               c++;
 183               next = to_str (c);
 184             }
 185           m = ly_str02scm (next.ch_C());
 186         }
 187       else
 188         {
 189           m = gh_int2scm (1);
 190         }
 191
 192       daddy_trans_l_->set_property ("rehearsalMark", m);
 193
 194
 195       text_p_->set_elt_property ("text",
 196                                  ly_str02scm ( t.ch_C()));
 197
 198       String style = "mark";
 199       for (int i=0; i < t.length_i(); i++)
 200         {
 201           if (!isdigit(t[i]))
 202             {
 203               style = "large";
 204               break;
 205             }
 206         }
 207       SCM st = ly_str02scm (style.ch_C());
 208       text_p_->set_elt_property ("style",  st);
 209     }
 210 }
 211