src/voice-regs.cc

   1 /*
   2   voice-regs.cc -- implement Voice_registers
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8 #include "commandrequest.hh"
   9 #include "musicalrequest.hh"
  10 #include "voice-regs.hh"
  11 #include "register.hh"
  12 #include "slur-reg.hh"
  13 #include "headreg.hh"
  14 #include "walkregs.hh"
  15 #include "debug.hh"
  16
  17 Voice_registers::Voice_registers(Voice *v_p)
  18 {
  19     voice_l_ = v_p;
  20     add(new Notehead_register);
  21     add(new Slur_register);
  22 }
  23
  24 void
  25 Voice_registers::acknowledge_element(Staff_elem_info i)
  26 {
  27     if (i.voice_l_ != voice_l_)
  28         return;
  29     Register_group_register::acknowledge_element(i);
  30 }
  31
  32 bool
  33 Voice_registers::try_request(Request*r_l)
  34 {
  35     if (r_l->voice_l() !=voice_l_)
  36         return false;
  37
  38     Command_req *c=r_l->command();
  39     if (c&&c->terminate()) {
  40         daddy_reg_l_->terminate_register(this);
  41         return true;            // scary. We're deleted now..
  42     } else if (c&&c->groupchange()) {
  43
  44         ((Walker_registers*)daddy_reg_l_->daddy_reg_l_)->       // scary.
  45             change_group(c->groupchange(), this,
  46                          (Voice_group_registers*)daddy_reg_l_); // UGR!
  47         return true;
  48     }
  49
  50     return Register_group_register::try_request(r_l);
  51 }
  52
  53 bool
  54 Voice_registers::acceptable_request_b(Request*r)
  55 {
  56 //    return (r->rest() || r->note() || r->slur() || r->groupchange());
  57     return  r->groupchange()
  58         || Register_group_register::acceptable_request_b(r);
  59 }
  60 void
  61 Voice_registers::do_print() const
  62 {
  63     mtor << "Voice= " << voice_l_<<'\n';
  64     Register_group_register::do_print();
  65 }