lily/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 "proto.hh"
   9 #include "plist.hh"
  10 #include "command-request.hh"
  11 #include "musical-request.hh"
  12 #include "voice-regs.hh"
  13 #include "register.hh"
  14 #include "slur-reg.hh"
  15 #include "headreg.hh"
  16 #include "walk-regs.hh"
  17 #include "debug.hh"
  18
  19 Voice_registers::Voice_registers(Voice *v_p)
  20 {
  21     voice_l_ = v_p;
  22     add(new Notehead_register);
  23     add(new Slur_register);
  24 }
  25
  26 void
  27 Voice_registers::acknowledge_element(Staff_elem_info i)
  28 {
  29     if (i.voice_l_ != voice_l_)
  30         return;
  31     Register_group_register::acknowledge_element(i);
  32 }
  33
  34 bool
  35 Voice_registers::try_request(Request*r_l)
  36 {
  37     if (r_l->voice_l() !=voice_l_)
  38         return false;
  39
  40     Command_req *c=r_l->command();
  41     if (c&&c->terminate()) {
  42         daddy_reg_l_->terminate_register(this);
  43         return true;            // scary. We're deleted now..
  44     } else if (c&&c->groupchange()) {
  45
  46         ((Walker_registers*)daddy_reg_l_->daddy_reg_l_)->       // scary.
  47             change_group(c->groupchange(), this,
  48                          (Voice_group_registers*)daddy_reg_l_); // UGR!
  49         return true;
  50     }
  51
  52     return Register_group_register::try_request(r_l);
  53 }
  54
  55 bool
  56 Voice_registers::acceptable_request_b(Request*r)
  57 {
  58     Command_req *  c_l = r->command();
  59     return  r->groupchange() || (c_l&&c_l->terminate())
  60         || Register_group_register::acceptable_request_b(r);
  61 }
  62 IMPLEMENT_STATIC_NAME(Voice_registers);
  63
  64 void
  65 Voice_registers::do_print() const
  66 {
  67 #ifndef NPRINT
  68     mtor << "Voice= " << voice_l_<<'\n';
  69     Register_group_register::do_print();
  70 #endif
  71 }