src/clefreg.cc

   1 /*
   2   clef.cc -- implement  Clef_register
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>,
   7   Mats Bengtsson <matsb@s3.kth.se>
   8 */
   9
  10 #include "clefreg.hh"
  11 #include "clefitem.hh"
  12 #include "debug.hh"
  13 #include "commandrequest.hh"
  14 #include "timedescription.hh"
  15 #include "complexwalker.hh"
  16 #include "stcol.hh"
  17
  18 Clef_register::Clef_register(Complex_walker*w)
  19     : Request_register(w)
  20 {
  21     clef_p_ = 0;
  22
  23     set_type("violin");
  24 }
  25 bool
  26 Clef_register::set_type(String s)
  27 {
  28     clef_type_str_  = s;
  29     if (clef_type_str_ == "violin") {
  30         c0_position_i_= -2;
  31     } else if (clef_type_str_ == "alto") {
  32         c0_position_i_= 4;
  33     } else if (clef_type_str_ == "tenor") {
  34         c0_position_i_= 6;
  35     } else if (clef_type_str_ == "bass") {
  36         c0_position_i_= 10;
  37     }else
  38         return false;
  39     walk_l_->set_c0_position(c0_position_i_);
  40     return true;
  41 }
  42
  43 void
  44 Clef_register::read_req(Clef_change_req*c_l)
  45 {
  46     if (!set_type(c_l->clef_str_))
  47         error("unknown clef type ", c_l->defined_ch_c_l_);
  48 }
  49
  50 bool
  51 Clef_register::try_request(Nonmusical_req* r_l)
  52 {
  53     if (!r_l->clefchange())
  54         return false;
  55
  56     accepted_req_arr_.push(r_l);
  57     // do it now! Others have to read c0_pos.
  58     read_req(r_l->clefchange());
  59     return true;
  60 }
  61
  62 void
  63 Clef_register::process_request()
  64 {
  65     const Time_description *time_l = &walk_l_->time_;
  66     if (!accepted_req_arr_.size() &&
  67         (!time_l->whole_in_measure_|| !time_l->when_)) {
  68
  69         clef_p_ = new Clef_item;
  70         clef_p_->change = false;
  71     } else if (accepted_req_arr_.size()) {
  72         clef_p_ = new Clef_item;
  73         clef_p_->change = true;
  74     }
  75     if (clef_p_) {
  76         clef_p_->read(*this);
  77 //      announce_element(Staff_elem_info(clef_p_,
  78 //                                       accepted_req_arr_[0], this));
  79     }
  80 }
  81
  82 void
  83 Clef_register::do_pre_move_process()
  84 {
  85     if (!clef_p_)
  86         return;
  87     if (clef_p_->change) {
  88         typeset_breakable_item(new Clef_item(*clef_p_),
  89                                clef_p_, new Clef_item(*clef_p_) );
  90     } else {
  91         typeset_breakable_item(0, 0, clef_p_);
  92     }
  93     clef_p_ = 0;
  94 }
  95