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 "dimension-cache.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 "staff-symbol.hh"
  22 #include "item.hh"
  23 #include "group-interface.hh"
  24
  25 /**
  26   put stuff over or next to  bars.  Examples: bar numbers, marginal notes,
  27   rehearsal marks.
  28  */
  29 class Mark_engraver : public Engraver
  30 {
  31 public:
  32   VIRTUAL_COPY_CONS(Translator);
  33   Mark_engraver ();
  34 protected:
  35   Item* text_p_;
  36   Protected_scm staffs_;
  37
  38 protected:
  39   virtual void do_creation_processing ();
  40   virtual void do_pre_move_processing ();
  41   virtual void acknowledge_element (Score_element_info);
  42   void create_items(Request*);
  43   virtual bool do_try_music (Music *req_l);
  44   virtual void do_process_music ();
  45   virtual void do_post_move_processing ();
  46 private:
  47   Mark_req * mark_req_l_;
  48 };
  49
  50
  51 ADD_THIS_TRANSLATOR (Mark_engraver);
  52
  53
  54 Mark_engraver::Mark_engraver ()
  55 {
  56   text_p_ =0;
  57   mark_req_l_ = 0;
  58   staffs_ = SCM_EOL;
  59 }
  60
  61 void
  62 Mark_engraver::do_creation_processing ()
  63 {
  64 }
  65
  66
  67 void
  68 Mark_engraver::acknowledge_element (Score_element_info inf)
  69 {
  70   Score_element * s = inf.elem_l_;
  71   if (dynamic_cast<Staff_symbol*> (s))
  72     {
  73       staffs_ = gh_cons (inf.elem_l_->self_scm_, staffs_);
  74     }
  75   else if (text_p_ && dynamic_cast<Bar*> (s))
  76     {
  77       /*
  78         Ugh. Figure out how to do this right at beginning of line, (without
  79         creating class Bar_script : public Item).
  80       */
  81       text_p_->set_parent (s, X_AXIS);
  82     }
  83 }
  84
  85 void
  86 Mark_engraver::do_pre_move_processing ()
  87 {
  88   if (text_p_)
  89     {
  90       text_p_->set_elt_pointer("side-support-elements" , staffs_);
  91       typeset_element (text_p_);
  92       text_p_ =0;
  93     }
  94 }
  95
  96
  97 void
  98 Mark_engraver::create_items (Request *rq)
  99 {
 100   if (text_p_)
 101     return;
 102
 103   SCM s = get_property ("basicMarkProperties");
 104   text_p_ = new Item (s);
 105
 106   Group_interface (text_p_, "interfaces").add_thing (ly_symbol2scm ("Mark"));
 107   Side_position_interface staffside(text_p_);
 108   staffside.set_axis (Y_AXIS);
 109
 110   /*
 111     -> Generic props.
 112    */
 113   SCM prop = get_property ("markDirection");
 114   if (!isdir_b (prop))
 115     {
 116       prop = gh_int2scm (UP);
 117     }
 118   text_p_->set_elt_property ("direction", prop);
 119
 120   SCM padding = get_property ("markScriptPadding");
 121   if (gh_number_p(padding))
 122     {
 123       text_p_->set_elt_property ("padding", padding);
 124     }
 125   else
 126     {
 127       text_p_
 128         ->set_elt_property ("padding",
 129                             gh_double2scm(paper_l ()->get_var ("interline")));
 130     }
 131
 132
 133   announce_element (Score_element_info (text_p_, rq));
 134 }
 135
 136
 137 void
 138 Mark_engraver::do_post_move_processing ()
 139 {
 140   mark_req_l_ = 0;
 141 }
 142
 143
 144 bool
 145 Mark_engraver::do_try_music (Music* r_l)
 146 {
 147   if (Mark_req *mr = dynamic_cast <Mark_req *> (r_l))
 148     {
 149       if (mark_req_l_ && mr->equal_b (mark_req_l_))
 150         return true;
 151       if (mark_req_l_)
 152         return false;
 153       mark_req_l_ = mr;
 154       return true;
 155     }
 156   return false;
 157 }
 158
 159 void
 160 Mark_engraver::do_process_music ()
 161 {
 162   if (mark_req_l_)
 163     {
 164       create_items (mark_req_l_);
 165
 166       String t;
 167
 168       /*
 169         automatic marks.
 170        */
 171       SCM m = (mark_req_l_->mark_label_ == SCM_UNDEFINED)
 172         ? get_property ("rehearsalMark")
 173         : SCM(mark_req_l_->mark_label_);
 174
 175       if (gh_number_p (m))
 176         {
 177           int mark_count = gh_scm2int (m);
 178           t = to_str (mark_count);
 179           mark_count ++;
 180           m = gh_int2scm (mark_count);
 181         }
 182       else if (gh_string_p (m))
 183         {
 184           t = ly_scm2string (m);
 185           String next;
 186           if (t.length_i ())
 187             {
 188               char c = t[0];
 189               c++;
 190               next = to_str (c);
 191             }
 192           m = ly_str02scm (next.ch_C());
 193         }
 194       else
 195         {
 196           m = gh_int2scm (1);
 197         }
 198
 199       daddy_trans_l_->set_property ("rehearsalMark", m);
 200
 201
 202       text_p_->set_elt_property ("text",
 203                                  ly_str02scm ( t.ch_C()));
 204
 205       String style = "mark";
 206       for (int i=0; i < t.length_i(); i++)
 207         {
 208           if (!isdigit(t[i]))
 209             {
 210               style = "large";
 211               break;
 212             }
 213         }
 214       SCM st = ly_str02scm (style.ch_C());
 215       text_p_->set_elt_property ("style",  st);
 216     }
 217 }
 218