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 "staffcolumn.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(Request * r_l)
  52 {
  53
  54     Command_req* creq_l= r_l->command();
  55     if (!creq_l || !creq_l->clefchange())
  56         return false;
  57
  58     accepted_req_arr_.push(creq_l);
  59     // do it now! Others have to read c0_pos.
  60     read_req(creq_l->clefchange());
  61     return true;
  62 }
  63
  64 void
  65 Clef_register::process_request()
  66 {
  67     const Time_description *time_l = &walk_l_->time_;
  68     if (!accepted_req_arr_.size() &&
  69         (!time_l->whole_in_measure_|| !time_l->when_)) {
  70
  71         clef_p_ = new Clef_item;
  72         clef_p_->change = false;
  73     } else if (accepted_req_arr_.size()) {
  74         clef_p_ = new Clef_item;
  75         clef_p_->change = true;
  76     }
  77     if (clef_p_) {
  78         clef_p_->read(*this);
  79 //      announce_element(Staff_elem_info(clef_p_,
  80 //                                       accepted_req_arr_[0], this));
  81     }
  82 }
  83
  84 void
  85 Clef_register::do_pre_move_process()
  86 {
  87     if (!clef_p_)
  88         return;
  89     if (clef_p_->change) {
  90         typeset_breakable_item(new Clef_item(*clef_p_),
  91                                clef_p_, new Clef_item(*clef_p_) );
  92     } else {
  93         typeset_breakable_item(0, 0, clef_p_);
  94     }
  95     clef_p_ = 0;
  96 }
  97