src/stem.cc

   1 #include "stem.hh"
   2 #include "dimen.hh"
   3 #include "debug.hh"
   4 #include "paper-def.hh"
   5 #include "notehead.hh"
   6 #include "lookup.hh"
   7 #include "molecule.hh"
   8 #include "pcol.hh"
   9 #include "misc.hh"
  10
  11 const int STEMLEN=7;
  12
  13
  14 Stem::Stem(int c) //, Moment len)
  15 {
  16     beams_left = 0;
  17     beams_right = 0;
  18     minnote = 1000;             // invalid values
  19     maxnote = -1000;
  20     bot = top = 0;
  21     flag = 4;
  22     dir =0;
  23     staff_center=c;
  24     stemlen=0;
  25     print_flag=true;
  26     stem_xoffset=0;
  27 }
  28
  29 void
  30 Stem::do_print() const
  31 {
  32 #ifndef NPRINT
  33     mtor << "flag "<< flag << " print_flag " << print_flag
  34          << "min,max [" << minnote << ", " << maxnote << "]";
  35 #endif
  36 }
  37 void
  38 Stem::set_stemend(Real se)
  39 {
  40
  41     // todo: margins
  42     if (!  ((dir > 0 && se >= maxnote) || (se <= minnote && dir <0))  )
  43         warning("Weird stem size; check for narrow beams",0);
  44
  45     top = (dir < 0) ? maxnote           : se;
  46     bot = (dir < 0) ? se  : minnote;
  47     flag = dir*abs(flag);
  48 }
  49
  50 void
  51 Stem::add(Notehead *n)
  52 {
  53     assert(status < PRECALCED);
  54
  55     if (n->balltype == 1)
  56         return;
  57     int p = n->position;
  58     if (p < minnote)
  59         minnote = p;
  60     if (p > maxnote)
  61         maxnote = p;
  62     heads.push(n);
  63     n->add_dependency(this);
  64 }
  65
  66
  67 int
  68 Stem::get_default_dir()
  69 {
  70     if (dir)
  71         return dir;
  72     Real mean = (minnote+maxnote)/2;
  73     return (mean > staff_center) ? -1: 1;
  74 }
  75
  76 void
  77 Stem::set_default_dir()
  78 {
  79     dir = get_default_dir();
  80 }
  81
  82 void
  83 Stem::set_default_stemlen()
  84 {
  85     if (!dir)
  86         set_default_dir();
  87
  88     int stafftop = 2*staff_center;
  89     stemlen = STEMLEN  + (maxnote - minnote);
  90
  91     // uhh... how about non 5-line staffs?
  92     if (maxnote < -2 && dir == 1){
  93         int t = staff_center - staff_center/2;
  94         stemlen = t - minnote +2;
  95     } else if (minnote > stafftop + 2 && dir == -1) {
  96         int t = staff_center + staff_center/2;
  97         stemlen = maxnote -t +2;
  98     }
  99
 100     assert(stemlen);
 101 }
 102
 103
 104 void
 105 Stem::set_default_extents()
 106 {
 107     if (minnote > maxnote) {
 108         warning("Empty stem. Ugh!", 0);
 109         minnote = -10;
 110         maxnote = 20;
 111     }
 112
 113     if (!stemlen)
 114         set_default_stemlen();
 115
 116     set_stemend((dir< 0) ? maxnote-stemlen: minnote +stemlen);
 117     if (dir > 0){
 118         stem_xoffset = paper()->note_width()-paper()->rule_thickness();
 119     } else
 120         stem_xoffset = 0;
 121 }
 122
 123 void
 124 Stem::set_noteheads()
 125 {
 126     if(!heads.size())
 127         return;
 128     heads.sort(Notehead::compare);
 129     heads[0]->extremal = -1;
 130     heads.top()->extremal = 1;
 131     int parity=1;
 132     int lastpos = heads[0]->position;
 133     for (int i=1; i < heads.size(); i ++) {
 134         int dy =abs(lastpos- heads[i]->position);
 135
 136         if (dy <= 1) {
 137             if (parity)
 138                 heads[i]->x_dir = (stem_xoffset>0) ? 1:-1;
 139             parity = !parity;
 140         } else
 141             parity = 0;
 142         lastpos = heads[i]->position;
 143     }
 144 }
 145
 146 void
 147 Stem::do_pre_processing()
 148 {
 149     if (bot == top)
 150         set_default_extents();
 151     set_noteheads();
 152 }
 153
 154
 155 Interval
 156 Stem::width()const
 157 {
 158     if (!print_flag || abs(flag) <= 4)
 159         return Interval(0,0);   // TODO!
 160     Paper_def*p= paper();
 161     Interval r(p->lookup_p_->flag(flag).dim.x);
 162     r+= stem_xoffset;
 163     return r;
 164 }
 165
 166 Molecule*
 167 Stem::brew_molecule_p()const return out;
 168 {
 169     assert(bot!=top);
 170
 171
 172     Paper_def *p =paper();
 173
 174     Real dy = p->internote();
 175     Symbol ss =p->lookup_p_->stem(bot*dy,top*dy);
 176
 177
 178     out = new Molecule(Atom(ss));
 179
 180     if (print_flag&&abs(flag) > 4){
 181         Symbol fl = p->lookup_p_->flag(flag);
 182         Molecule m(fl);
 183         if (flag < -4){
 184             out->add_bottom(m);
 185         } else if (flag > 4) {
 186             out->add_top(m);
 187         } else
 188             assert(false);
 189     }
 190
 191     out->translate(Offset(stem_xoffset,0));
 192 }
 193
 194 Real
 195 Stem::hindex()const
 196 {
 197     return pcol_l_->hpos + stem_xoffset; // hmm.  + offset_.x;
 198 }
 199
 200