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     terminate_b_ = false;
  22     ireg_C_ = ireg_C;
  23     voice_l_ = v_p;
  24     add(ireg_C->get_nongroup_p_arr());
  25 }
  26
  27 void
  28 Voice_registers::acknowledge_element(Staff_elem_info i)
  29 {
  30     if (i.voice_l_ != voice_l_)
  31         return;
  32     Register_group_register::acknowledge_element(i);
  33 }
  34
  35 bool
  36 Voice_registers::try_request(Request*r_l)
  37 {
  38     if (r_l->voice_l() !=voice_l_)
  39         return false;
  40
  41     Command_req *c=r_l->command();
  42     if (c&&c->terminate()) {
  43         terminate_b_ = true;
  44         return true;            // scary. We're deleted now..
  45     } else if (c&&c->groupchange()) {
  46         /* this is scary as well. The groupchange has to be handled by
  47          the Staff_registers, which are two levels up in the hierarchy
  48          */
  49
  50         assert(daddy_reg_l_->name() == Voice_group_registers::static_name());
  51         ((Staff_registers*)daddy_reg_l_->daddy_reg_l_)->        // scary.
  52             change_group(c->groupchange(), this,
  53                          (Voice_group_registers*)daddy_reg_l_); // ugh!
  54         return true;
  55     }
  56
  57     return Register_group_register::try_request(r_l);
  58 }
  59
  60 bool
  61 Voice_registers::acceptable_request_b(Request*r)
  62 {
  63     Command_req *  c_l = r->command();
  64     return   (c_l&&(c_l->terminate()||c_l->groupchange()))
  65         || Register_group_register::acceptable_request_b(r);
  66 }
  67 IMPLEMENT_STATIC_NAME(Voice_registers);
  68
  69 void
  70 Voice_registers::do_print() const
  71 {
  72 #ifndef NPRINT
  73     mtor << "Voice= " << voice_l_<<'\n';
  74     Register_group_register::do_print();
  75 #endif
  76 }
  77
  78 void
  79 Voice_registers::pre_move_processing()
  80 {
  81     if (terminate_b_)
  82         daddy_reg_l_->terminate_register(this);
  83     else
  84         Register_group_register::pre_move_processing();
  85 }