lily/g-staff-side.cc

   1 /*
   2   g-staff-side.cc --  implement G_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 "g-staff-side.hh"
  11 #include "staff-symbol.hh"
  12 #include "debug.hh"
  13 #include "warn.hh"
  14 #include "dimensions.hh"
  15
  16 G_staff_side_element::G_staff_side_element ()
  17 {
  18   dir_ = CENTER;
  19   to_position_l_ = 0;
  20   set_elt_property (transparent_scm_sym, SCM_BOOL_T);
  21   staff_support_b_ = true;
  22   axis_ = Y_AXIS;
  23 }
  24
  25
  26
  27 void
  28 G_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 G_staff_side_element::get_default_direction () const
  39 {
  40   return DOWN;
  41 }
  42
  43
  44 void
  45 G_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 G_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 G_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 G_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   SCM pad = remove_elt_property (padding_scm_sym);
 109   if (pad != SCM_BOOL_F)
 110     {
 111       off += gh_scm2double (SCM_CDR(pad)) * dir_;
 112     }
 113   Real total_off = dim[dir_] - sym_dim[-dir_] + off;
 114   dim_cache_[axis_]->set_offset (total_off);
 115   if (fabs (total_off) > 100 CM)
 116     programming_error ("Huh ? Improbable staff side dim.");
 117 }
 118
 119 void
 120 G_staff_side_element::do_post_processing ()
 121 {
 122   if (axis_ == Y_AXIS)
 123     position_self ();
 124 }
 125
 126
 127 void
 128 G_staff_side_element::do_add_processing ()
 129 {
 130   if (staff_support_b_
 131       && axis_ == Y_AXIS && staff_symbol_l ())
 132     {
 133       add_support (staff_symbol_l ());
 134     }
 135 }
 136
 137 Interval
 138 G_staff_side_element::do_height () const
 139 {
 140   Interval i;
 141   if (to_position_l_)
 142     return to_position_l_->extent (Y_AXIS);
 143   return i;
 144 }
 145
 146 void
 147 G_staff_side_element::do_print () const
 148 {
 149 #ifndef NPRINT
 150   if (to_position_l_)
 151     DOUT << "positioning " << to_position_l_->name();
 152
 153   DOUT << "axis == " << axis_name_str (axis_)
 154        << ", dir == " << to_str (dir_ );
 155 #endif
 156 }
 157
 158
 159 Interval
 160 G_staff_side_item::do_width () const
 161 {
 162   Interval i;
 163   if (to_position_l_)
 164     return to_position_l_->extent (X_AXIS);
 165   return i;
 166 }
 167
 168 void
 169 G_staff_side_item::do_print () const
 170 {
 171   G_staff_side_element::do_print ();
 172 }
 173
 174 void
 175 G_staff_side_spanner::do_print () const
 176 {
 177   G_staff_side_element::do_print ();
 178 }