lily/text-engraver.cc

   1 /*
   2   text-engraver.cc --  implement Text_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9 #include "dimension-cache.hh"
  10
  11 #include "engraver.hh"
  12 #include "side-position-interface.hh"
  13 #include "text-item.hh"
  14 #include "musical-request.hh"
  15 #include "note-head.hh"
  16 #include "stem.hh"
  17 #include "staff-symbol.hh"
  18
  19 /**
  20    typeset directions that are  plain text.
  21  */
  22 class Text_engraver : public Engraver
  23 {
  24   Link_array<Text_script_req> reqs_;
  25   Link_array<Text_item> texts_;
  26 public:
  27
  28   VIRTUAL_COPY_CONS(Translator);
  29 protected:
  30   virtual bool do_try_music (Music* m);
  31   virtual void do_pre_move_processing ();
  32   virtual void do_post_move_processing ();
  33   virtual void do_process_requests ();
  34   virtual void acknowledge_element (Score_element_info);
  35 };
  36
  37
  38 bool
  39 Text_engraver::do_try_music (Music *m)
  40 {
  41   if (Text_script_req *r = dynamic_cast<Text_script_req*> (m))
  42     {
  43       reqs_.push (r);
  44       return true;
  45     }
  46   return false;
  47 }
  48
  49
  50 void
  51 Text_engraver::acknowledge_element (Score_element_info i)
  52 {
  53   if (Note_head *n = dynamic_cast<Note_head*> (i.elem_l_))
  54     {
  55       for (int i=0; i < texts_.size (); i++)
  56         {
  57           Side_position_interface st (texts_[i]);
  58           st.add_support (n);
  59           if (st.get_axis( ) == X_AXIS
  60               && !texts_[i]->parent_l (Y_AXIS))
  61             texts_[i]->set_parent (n, Y_AXIS);
  62         }
  63     }
  64   if (Stem *n = dynamic_cast<Stem*> (i.elem_l_))
  65     {
  66       for (int i=0; i < texts_.size (); i++)
  67         {
  68           Side_position_interface st(texts_[i]);
  69           st.add_support (n);
  70         }
  71     }
  72 }
  73
  74 void
  75 Text_engraver::do_process_requests ()
  76 {
  77   for (int i=0; i < reqs_.size (); i++)
  78     {
  79       Text_script_req * r = reqs_[i];
  80
  81       Text_item *text = new Text_item;
  82       Side_position_interface stafy (text);
  83
  84       SCM axisprop = get_property ("scriptHorizontal",0);
  85       if (gh_boolean_p (axisprop) && gh_scm2bool (axisprop))
  86         {
  87           stafy.set_axis (X_AXIS);
  88           //      text->set_parent (ss, Y_AXIS);
  89         }
  90       else
  91         stafy.set_axis (Y_AXIS);
  92
  93       text->set_elt_property ("script-priority",
  94                             gh_int2scm (200));
  95
  96       if (r->get_direction ())
  97         stafy.set_direction (r->get_direction ());
  98
  99       text->text_str_ = r->text_str_;
 100
 101       if (r->style_str_.length_i ())
 102         text->set_elt_property ("style", ly_str02scm (r->style_str_.ch_C()));
 103
 104       SCM empty = get_property ("textEmptyDimension", 0);
 105       if (gh_boolean_p (empty) && gh_scm2bool (empty))
 106         {
 107           text->set_empty (X_AXIS);
 108         }
 109
 110       announce_element (Score_element_info (text, r));
 111       texts_.push (text);
 112     }
 113 }
 114
 115 void
 116 Text_engraver::do_pre_move_processing ()
 117 {
 118   for (int i=0; i < texts_.size (); i++)
 119     {
 120       typeset_element (texts_[i]);
 121     }
 122   texts_.clear ();
 123 }
 124
 125 void
 126 Text_engraver::do_post_move_processing ()
 127 {
 128   reqs_.clear ();
 129 }
 130
 131 ADD_THIS_TRANSLATOR(Text_engraver);
 132