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 "staff-regs.hh"        // needed because somebody has to delete us.
  15 #include "debug.hh"
  16 #include "input-register.hh"
  17 #include "voice-group-regs.hh"
  18
  19 Voice_registers::Voice_registers(Voice *v_p, Input_register const*ireg_C)
  20 {
  21     ireg_C_ = ireg_C;
  22     voice_l_ = v_p;
  23     add(ireg_C->get_nongroup_p_arr());
  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         /* this is scary as well. The groupchange has to be handled by
  46          the Staff_registers, which are two levels up in the hierarchy
  47          */
  48
  49         assert(daddy_reg_l_->name() == Voice_group_registers::static_name());
  50         ((Staff_registers*)daddy_reg_l_->daddy_reg_l_)->        // scary.
  51             change_group(c->groupchange(), this,
  52                          (Voice_group_registers*)daddy_reg_l_); // UGR!
  53         return true;
  54     }
  55
  56     return Register_group_register::try_request(r_l);
  57 }
  58
  59 bool
  60 Voice_registers::acceptable_request_b(Request*r)
  61 {
  62     Command_req *  c_l = r->command();
  63     return   (c_l&&(c_l->terminate()||c_l->groupchange()))
  64         || Register_group_register::acceptable_request_b(r);
  65 }
  66 IMPLEMENT_STATIC_NAME(Voice_registers);
  67
  68 void
  69 Voice_registers::do_print() const
  70 {
  71 #ifndef NPRINT
  72     mtor << "Voice= " << voice_l_<<'\n';
  73     Register_group_register::do_print();
  74 #endif
  75 }