lily/staff-side.cc

   1 /*
   2   g-staff-side.cc --  implement Staff_side_element
   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
  10 #include "staff-side.hh"
  11 #include "staff-symbol.hh"
  12 #include "debug.hh"
  13 #include "warn.hh"
  14 #include "dimensions.hh"
  15 #include "dimension-cache.hh"
  16
  17 Staff_side_element::Staff_side_element ()
  18 {
  19   dir_ = CENTER;
  20   to_position_l_ = 0;
  21   set_elt_property (transparent_scm_sym, SCM_BOOL_T);
  22   axis_ = Y_AXIS;
  23 }
  24
  25
  26
  27 void
  28 Staff_side_element::do_pre_processing ()
  29 {
  30   if (!dir_)
  31     dir_ = get_default_direction ();
  32
  33   if (axis_ == X_AXIS)
  34     position_self ();
  35 }
  36
  37 Direction
  38 Staff_side_element::get_default_direction () const
  39 {
  40   return DOWN;
  41 }
  42
  43
  44 void
  45 Staff_side_element::set_victim (Score_element *e)
  46 {
  47   add_dependency (e);
  48   to_position_l_ = e;
  49   to_position_l_->dim_cache_[axis_]->parent_l_ = dim_cache_[axis_];
  50 }
  51
  52 void
  53 Staff_side_element::add_support (Score_element*e)
  54 {
  55   add_dependency (e);
  56   support_l_arr_.push (e);
  57 }
  58
  59
  60 void
  61 Staff_side_element::do_substitute_element_pointer (Score_element*o, Score_element*n)
  62 {
  63   Staff_symbol_referencer::do_substitute_element_pointer (o,n);
  64   if (o == to_position_l_)
  65     to_position_l_ = n;
  66   else
  67     support_l_arr_.unordered_substitute (o,n);
  68 }
  69
  70 void
  71 Staff_side_element::position_self ()
  72 {
  73   if (to_position_l_ &&
  74       to_position_l_->get_elt_property (transparent_scm_sym) != SCM_BOOL_F)
  75     return;
  76
  77   Interval dim;
  78   Dimension_cache *common = 0;
  79   if (support_l_arr_.size ())
  80     {
  81       common = common_group (typecast_array (support_l_arr_, (Graphical_element*)0),
  82                              axis_);
  83
  84       for (int i=0; i < support_l_arr_.size (); i++)
  85         {
  86           Score_element * e = support_l_arr_ [i];
  87           Real coord = e->relative_coordinate (common, axis_);
  88
  89           dim.unite (coord + e->extent (axis_));
  90         }
  91     }
  92   else
  93      common = dim_cache_[axis_]->parent_l_;
  94
  95   if (dim.empty_b ())
  96     {
  97       dim = Interval(0,0);
  98     }
  99
 100
 101   Interval sym_dim
 102     = to_position_l_
 103     ? to_position_l_->extent (axis_)
 104     : Interval(0,0);
 105
 106   Real off =  dim_cache_[axis_]->relative_coordinate (common);
 107
 108
 109
 110   SCM pad = remove_elt_property (padding_scm_sym);
 111   if (pad != SCM_BOOL_F)
 112     {
 113       off += gh_scm2double (SCM_CDR(pad)) * dir_;
 114     }
 115   Real total_off = dim[dir_] + off;
 116
 117   /*
 118     no_staff_support_scm_sym is ugh bugfix to get staccato dots right.
 119    */
 120   if (to_position_l_ && to_position_l_->get_elt_property (no_staff_support_scm_sym) == SCM_BOOL_F)
 121      total_off += - sym_dim[-dir_];
 122
 123   dim_cache_[axis_]->set_offset (total_off);
 124   if (fabs (total_off) > 100 CM)
 125     programming_error ("Huh ? Improbable staff side dim.");
 126 }
 127
 128 void
 129 Staff_side_element::do_post_processing ()
 130 {
 131   if (axis_ == Y_AXIS)
 132     position_self ();
 133 }
 134
 135
 136 void
 137 Staff_side_element::do_add_processing ()
 138 {
 139   if (get_elt_property (no_staff_support_scm_sym) == SCM_BOOL_F
 140       && axis_ == Y_AXIS && staff_symbol_l ())
 141     {
 142       add_support (staff_symbol_l ());
 143     }
 144 }
 145
 146 Interval
 147 Staff_side_element::do_height () const
 148 {
 149   Interval i;
 150   if (to_position_l_)
 151     return to_position_l_->extent (Y_AXIS);
 152   return i;
 153 }
 154
 155 void
 156 Staff_side_element::do_print () const
 157 {
 158 #ifndef NPRINT
 159   if (to_position_l_)
 160     DOUT << "positioning " << to_position_l_->name();
 161
 162   DOUT << "axis == " << axis_name_str (axis_)
 163        << ", dir == " << to_str (dir_ );
 164 #endif
 165 }
 166
 167
 168 Interval
 169 Staff_side_item::do_width () const
 170 {
 171   Interval i;
 172   if (to_position_l_)
 173     return to_position_l_->extent (X_AXIS);
 174   return i;
 175 }
 176
 177 void
 178 Staff_side_item::do_print () const
 179 {
 180   Staff_side_element::do_print ();
 181 }
 182
 183 void
 184 Staff_side_spanner::do_print () const
 185 {
 186   Staff_side_element::do_print ();
 187 }